How Psychology Affects The Work Of General Practitioners...

Investigate how psychology can be used to understand specific behaviours, and examine how it can be applied to the work of General Practitioners and social workers Psychodynamic - Strengths and Limitations: Strengths- †¢ Defence Mechanisms, this allows other to relate one thing to another by putting a reason behind it, for example if a child is seen to be abusive towards an animal then it can be viewed as displacement from maybe their home life and it would mean that professionals would need to look into it as a child could be getting abused and taking their anger out on animals. †¢ Free association, by using free association it allows professional to be able to tell someone’s state of mind, they can tell this by saying a word and the†¦show more content†¦Ã¢â‚¬ ¢ Biased Sample, the sample in which Freud used was biased in all aspects as he only used women who were his own patients, they also all had mental health issues. His one other study of little Hans was also the only sample he did on a child. †¢ Rejects Free will, This approach does not allow any evidence of the use of free will, this is because it does not allow for any biological processes that may take part. How can doctors and social workers use this theory? Doctors- †¢ Doctors can use this approach as they can talk through free association and maybe uncover why a person is feeling the way they are. Free association is a technique used in psychoanalytic therapy to help patients learn more about what they are thinking and feeling. This is where the professional says a word and the service user has to say the first words that come into their head. A doctor would not specifically have the qualifications to deal with this so they would refer the service user to a counsellor. Social workers- †¢ This approach can be used by social workers as they can look at not just the service user but they can also look at the family and their environment, as this would give them an idea to their upbringing, as see if that could be influences their behaviour. How can this theory be used to explain addictions and depression? The psychodynamic approach highlight how important childhood it, and with knowing this if there was any disruption to the growth and development of a child they

Happy Mushroom Marketing Plan - 2236 Words

MARKETING PLAN I. BACKGROUND A. MARKET SITUATION Freshly packed mushroom products, Happy Mushroom comes with two varieties -- the fresh mushroom and dried mushroom, specifically oyster, shitake, straw and button mushroom, carefully packed every morning. The revolutionary Mushroom contains about 80 to 90 % water and is very low in calories. It is also an excellent source of potassium and somehow reduces breast cancer and prostate cancer. And its re-sealable and biodegradable packaging makes it very useful and earth-friendly, Specifically, Happy Mushroom offers the following benefits: * Health supplement for cardiovascular support * Immune modulation and lowering of cholesterol * Stimulate the immune system and help†¦show more content†¦In this age of fitness and form, health-conscious generation has brought the dietary products back in the limelight, and its rising popularity is attributed to the abundance of nutritional plants in the Philippines, which are beneficial to the body: provides health supplement for cardiovascular support, immune modulation and lowering of cholesterol, stimulate the immune system and help fighting infection an also demonstrate anti-tumor activity. 2. House to house selling and availability in Market Stalls. Our primary target market is Household families, who seek new ingredients, new recipes for their family, thus we are taking this opportunity to serve them through our house to house selling. And also we will be placing our mushroom products to different vegetable stalls in different baranggays. Threats We face these main threats at the introduction of Happy Mushrooms. 1. Dense competition of Mushroom Farms in Tagaytay area. Many farms were been established long before the launching of Happy Mushroom farm in Tagaytay area. Same product category, close range of pricing but not all of the benefits of Happy Mushroom products. Therefore, our marketing communication must stress out the clear product differentiation and the great value-for-price advantage. 2. High inflation in dietary products. The country’s high inflation rates can affect the production, sales, and revenue of our product. Objectives and Issues First Year Objectives. 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Review Questions Free Essays

1. Explain the significance of components (encapsulation) in the context of object-oriented development. 2. We will write a custom essay sample on Review Questions or any similar topic only for you Order Now Explain how does OO based development helps reuse? 3. How does the concept of inheritance relate to OO-based development? 4. How does the concept of composition/ aggregation relate to OO-based development? 5. Identify the four components of a use case and how they affect each other. 6. Provide an example for actor generalization. What is the significance of generalizing or specializing actors? 7. Provide an example for use case generalization. What is its significance? 8. What are the differences between â€Å"extend† and â€Å"include† use cases? 9. How do you define structural modeling in an object-oriented approach? 10. How would you distinguish objects from classes? Can you provide an example? 11. Where do classes originate from? 12. To build an information system, which one do you need to identify first, classes or objects? Explain. 13. Structural modeling represents classes or objects? 14. How does encapsulation protect business rules from unauthorized access and manipulation? 15. How does an object’s interface relate to services that the object provides? 6. Comment on the statement: â€Å"Classes provide the containers and objects provide the contents. † 17. Why should operations be described by verbs? 18. What is â€Å"protected† visibility? Give an example. 19. What is the difference between aggregation and composition? Give an example for each. 20. Describe the relationship between dynamic modeling, behavio ral modeling and structural modeling. 21. Comment on this statement: â€Å"Dynamic modeling is about interaction. † 22. How sequence diagram differs from use-case modeling? 23. Explain how objects interact by exchanging messages. 4. Explain the role of parameters and return values in exchanging messages. 25. What are the building blocks of a sequence diagram? 26. Explain the lifetime of an object. Provide an example. 27. How actors and objects fit in a sequence diagram? 28. Why dynamic modeling is based on objects, but not classes? 29. Explain the following pairs in relation to each other: a. Method Operation b. Event State. c. Interaction Message. 30. What are the components of statechart modeling? 31. What is the significance of statechart modeling? How to cite Review Questions, Essay examples Review Questions Free Essays In your own words explain what is meant by: vision, mission and goals. Vision – it is an aspirational view of what the company will be like in the future. It is a detailed description of how things will be when the organization eventually reaches its destination. We will write a custom essay sample on Review Questions or any similar topic only for you Order Now Mission † A mission statement answers the question â€Å"Why do we exist? † and expresses the company’s purpose both for those in the organization and for the public. It identifies the organizations reason for being and may define the rganizations primary customers, the products and services that they produce. Purpose is to communicate what the company stands for and where it is heading. Goals – Is basically what the organization alms to achieve In future, perhaps to increase revenue, profit, reputation and loyalty to the public. 2) Discuss their role on strategy formulation. The vision, mission and goals play a great part when organizations formulate their strategy for the long term direction as it will help to identify the implementation steps, the planning, coordination, collaboration, communication and control that the ompany will need to do In order to achieve the maln goal of their organization. ) In your opinion, what should be the starting point for strategy formulation be? The competitive advantage from the resource and capabilities of the organization will be the starting point of strategy formulation. Organizations identify how they differ from their competitors and design such strategies to exploit such differences, as strategy is about being different and this will help In formulating long term direction, scope of the organization and alrnlng to achieve advantage In a changing environment. International strategy 1) What Is the difference between global and multl-domestlc strategy? Global Strategy – assumes a single market and offers a standard product to meet customer needs wherever they are located. This is a cost leadership strategy, exploiting economies of scale and other cost efficiencies. Multi-domestic strategy – assumes variance in customers needs according to their location and therefore issues a differentiation strategy, adapting products and services to make unique local requirements. ) Identify five examples of each. Multi-domestic Strategy 1) Red bull and Packaging 2) Nokia 2) 3) Reebok 3) 4) Ford Motor 4) 5) McDonalds 5) Value chain and value system 1) Explain how the concept/framework of the value chain and value system may help in the strategy formulation process. The value chain will help identify competitive advantage. Focusing on the way the organization may use its resources may allow the organization to identify how it can be different and unique or where it can be more efficient. ) With reference to the value chain; identify alternative strategies available to the nternational organization Since an international organization will typically comprise of more than one business, the organization should be decomposed into strategic business units with different strategies considered for each. An organization can develop cost leadership, product differentiation, and business innovation strategies to confront its competitive forces. Cost leadership requires the organization to find and exploit sources of cost advantages, efficient manufacturing processes and tight cost controls. Product differentiation is based on understanding the customers and heir needs in order to provide something unique and valuable to them. Generic Strategy 1) Describe each of the generic strategies Segmentation strategy Cost leadership – This strategy involves the firm winning market share by appealing to cost-conscious or price-sensitive customers. This is achieved by having the lowest prices in the target market segment, or at least the lowest price to value ratio (price compared to what customers receive). To succeed at offering the lowest price while still achieving profitability and a high return on investment, the firm must be able to Differentiation strategy – A differentiation strategy is appropriate where the target customer segment is not price-sensitive, the market is competitive or saturated, customers have very specific needs which are possibly under-served, and the firm has unique resources and capabilities which enable it to satisfy these needs in ways that are difficult to copy. 2) Identify and describe the strategies that may deliver a competitive advantage. Since an international organization will typically comprise of more than one business, he organization should be decomposed into strategic business units with different strategies considered for each. An organization can develop cost leadership, product differentiation, and business innovation strategies to confront its competitive forces. Cost leadership requires the organization to find and exploit sources of cost advantages, efficient manufacturing processes and tight cost controls. Product differentiation is based on understanding the customers and their needs in order to provide something unique and valuable to them. Strategy formulation 1) Identify and describe the different ways strategy may be formed within organizations In general terms, strategy formation in most organizations can be thought of as resolving around the interplay for three basic forces: An environment that changes continuously but regularly; An organizational operating system A leadership whose role is to mediate between these two forces, to maintain the stability of the organizations operating system while at the same time ensuring its adaptation to environmental change. Describe the key stages in a typical planning approach to strategy formulation 3) Critically evaluate, compare and contrast the planning and adaptive modes of strategy formulation Competitive advantange 1) In your own words, explain what is meany by resource, routine, capability and competence. How to cite Review Questions, Papers

Edward Weston Biography Essay Example For Students

Edward Weston Biography Essay Weston is, in the real sense, one of the few creative artists of today. He has recreated the matter-forms and forces of nature; he has made these forms eloquent of the fundamental unity of the work. His work illuminates mans inner journey toward perfection of the spirit. Ansel Adams, Date Unknown Edward Weston 1886-1958 may seem like he was a confused man in trying to find his photographic goals. Just like many other photographers, both of his time and now, he strove to find what truly satisfied his talent and the acceptance of himself. He generated something for all photographers. This was success and recognition as a grand master of twentieth century photography. This was a legacy that tells an interesting tale; it tells a tale of a thousand plus successful and loved photographs, a daily journal, and a life with its ups and downs and broad dimensions. He was born in Highland Park, Illinois, and thus he was an American photographer. His mother died when he was five, possibly the reason for his skipping out of his schooling. At the age of sixteen 1902, his father bought him a Kodak box camera Bulls-Eye No. 2. Soon he was saving money to buy a better 5x camera with a tripod. Taking photographs interested and obsessed him. He wrote, I needed no friends now. . . Sundays my camera and I would take long car-rides into the country. . . In 1906, two things happened. First, a submission of his was printed in the magazine Camera and Darkroom. This photograph was called simply Spring. Secondly, he moved to California to work as a surveyor for San Pedro, Los Angeles and Salt Lake Railroad. From that time on, his interests lied in everything that was unorthodox astrology, the occult, nudism, vegetarianism, etc.. Maybe he never was much of an orthodox type man or photographer. He went back to Illinois for several months to attend the Illinois College of Photography. The inspiration behind this was to show his girlfriend, a daughter of a wealthy land-owner that hed make money for them. He then headed back to California for good. This lead to marriage in 1909 and to two sons soon afterwards. During this time, Weston also became the founding member of the Camera Pictorialists of Los Angeles. 1911: Began a portrait studio in Tropico, California. This studio would stay open until 1922. Also 1911: He started writing articles that were published in magazines. One of these magazines was called American Photographer. His third and fourth sons were born in 1916 and 1919. Weston had always enjoyed photography as an art, but, in 1915, his visit to the San Francisco Panama Pacific Exhibition began a series of events that would lead him to a renouncement of pictorialism. At the exhibition, he viewed abstract paintings. These caused him to vow to capture the physical quality of the objects he photographed with the sharpest truthfulness and exactitude. Thus began a dissatisfaction with his own work. In 1922, he traveled to Ohio and took photographs of the Armco Steel Plant and then went to New York. There he met Alfred Stieglitz, Paul Strand, Charles Sheck and Georgia OKeefe. After that, he renounced pictorialism all together. He often traveled to Mexico during the 1920s, and his photographs included nudes. One of these nudes, named Tina Modotti, would turn into his own personal love affair, breaking up his marriage. He made many photographs in Mexico. Some were published in the book Idols Behind Altars by Anita Brenner. During this time, he also began to photograph seashells, vegetables and nudes. In 1929, his first New York exhibit occurred at the Alma Reeds Delphic Studios Gallery and later showed at Harvard Society of Contemporary Arts. His photographs were shown along with the likes of Walker Evans, Eugene Atget, Charles Sheeler, Alfred Stieglitz, and many others. In 1932, he became a Charter member, along with Ansel Adams, of the Group f/64 Club. The club was also founded that same year. The goal of this club was to secure maximum image sharpness of both foreground and distance. .u3d5970940fa12f15e248f305d3d815a4 , .u3d5970940fa12f15e248f305d3d815a4 .postImageUrl , .u3d5970940fa12f15e248f305d3d815a4 .centered-text-area { min-height: 80px; position: relative; } .u3d5970940fa12f15e248f305d3d815a4 , .u3d5970940fa12f15e248f305d3d815a4:hover , .u3d5970940fa12f15e248f305d3d815a4:visited , .u3d5970940fa12f15e248f305d3d815a4:active { border:0!important; } .u3d5970940fa12f15e248f305d3d815a4 .clearfix:after { content: ""; display: table; clear: both; } .u3d5970940fa12f15e248f305d3d815a4 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u3d5970940fa12f15e248f305d3d815a4:active , .u3d5970940fa12f15e248f305d3d815a4:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u3d5970940fa12f15e248f305d3d815a4 .centered-text-area { width: 100%; position: relative ; } .u3d5970940fa12f15e248f305d3d815a4 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u3d5970940fa12f15e248f305d3d815a4 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u3d5970940fa12f15e248f305d3d815a4 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u3d5970940fa12f15e248f305d3d815a4:hover .ctaButton { background-color: #34495E!important; } .u3d5970940fa12f15e248f305d3d815a4 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u3d5970940fa12f15e248f305d3d815a4 .u3d5970940fa12f15e248f305d3d815a4-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u3d5970940fa12f15e248f305d3d815a4:after { content: ""; display: block; clear: both; } READ: Murder in Black and White: Victorian Crime Scenes and the Ripper Photographs EssayIn 1934, Weston vowed to make only unretouched portraits. He strived to be as far away from pictorialism as he could. In 1935, he initiated the Edward Weston Print of the Month Club. He offered photographs for ten dollars each. In 1937, he was awarded the first Guggenheim fellowship. In 1940, a book called California and the West featured his photographs and the text of Charis Wilson his new wife not the nude, Tina Modotti. In 1941, Weston was commissioned by the Limited Editions Club to illustrate a new edition of Walt Whitmans Leaves of Grass. Weston started suffering from Parkinsons diseas e in 1946. That same year the Museum of Modern Art in New York City featured a retrospective of his work; three hundred prints were on display. To sort of sign-off from photographing, Weston went to his favorite photographing spot at Point Lobos. There he would take his last photographs 1948. For the next ten years, he supervised his two sons in the printing of Edward Weston life works. Also, in 1952, he published a Fiftieth Anniversary Portfolio. He died in 1958 at his home in Carmel. From his famous studies of the green pepper to his favorite spots at Point Lobos, Weston was mainly concerned in photographing nature. Thats why his photographs encompassed still-lifes, seashells, tree stumps, eroded rocks, female nudes, landscapes, and other natural forms. His 1936 compilation of photographs of California sand dunes is considered by many to be his finest work. Many feel he brought regeneration to photography, and maybe he did. It seems, whether he liked it or not, that pictorialism never left him. No matter how sharp and truthful his photographs became or were, they seemed to always have a pictorial feel. Maybe someday Ill read through the daily journal he kept, called Daybooks. It was published, most of it after his death. Maybe then I could get a feel for what Point Lobos meant and what the shapes of the vegetables, seashells, and the rolling dunes meant. Maybe I could understand his obsession with female nudes and their shapes and his brief period of industrial scenes. The tale is told. Weve seen the photographs, few among thousands. Weve seen the broad dimensions that encompassed his life. Weve also seen the journal, his daily pouring out. It is indeed a true legacy, a legacy that lives on through the sharp, up close-and personal photographs.

The process of being cool free essay sample

This Is basically a form of protection against stealing other peoples work. Copyright Is to software as plagiarism Is to writing. People put money Into copyrighting any original work. This includes, literary, musical, dramatic, artistic, and other Intellectual pieces. When avoiding the cost of these works, people are stealing money. Not only Is online piracy morally and lawfully wrong, but It comes with hefty consequences. According to source 3, Criminally copyright Infringement Is Investigated by federal law enforcement agencies and Is punishable by up to 5 years In prison and a fine of 250,000. Even though the consequences are severe, people continue to commit online piracy. People, who produce this music online, put in excess amounts of energy, time, and money while getting nothing in return. In source 4, the artist asks, do you think about the days, weeks, months- maybe even years- that we have to put into writing, practicing, recording, mixing, and distributing that song? The frustrations of being taken advantage of are evident in this source. We will write a custom essay sample on The process of being cool or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Artists want to share their music but cannot be giving it away for free.This is their living and it would be impossible for them to make any profit if everyone is Just took part in online piracy. When people participate in online piracy, they are stealing work that has taken many hours and much money to produce. Not only is online piracy illegal, but there are many consequences and risks that follow. As stated in source 1, when you participate in peer-to peer networks, private data and sensitive documents on your computer become accessible to others.. . This is a way identity theft and fraud occurs.Many people do not think about the risks involved in illegally reproducing or distributing copyrighted material, but they are significant. There is also a treat of viruses. The practice of using file-sharing sites invites many different viruses that can be detrimental to the computer being used. Not only is it stealing, but both civil and criminal penalties are severe (source 1). While there are many reasons In favor of people getting prosecuted for online piracy, there are also some reasons against prosecution for it. Many people argue that everyone does It, so why cant they do It.Just because everyone is participating In online piracy, does not change that It Is against the law. The amount of people that participate In online piracy Is evident In the plea graph used in source 3. People were surveyed on the acceptability of piracy. Out of all the people surveyed, 56. 5% approved of online piracy. More than half believe It Is okay to download music files Illegally. The mall culprits of online piracy are teenagers.

Biography of Adam Smith, Founding Father of Economics

Biography of Adam Smith, Founding Father of Economics Adam Smith (June 16, 1723–July 17, 1790) was a Scottish philosopher who today is considered to be the father of economics. His seminal work, The Wealth of Nations, published in 1776, influenced generations of politicians, leaders, and thinkers, including Alexander Hamilton, who looked to Smiths theories when, as secretary of the treasury, he fashioned the economic system of the United States. Fast Facts: Adam Smith Known For: Father of economicsBorn: June 16, 1723 in Fife, ScotlandParents: Adam Smith, Margaret DouglasDied: July 17, 1790 in Edinburgh, ScotlandEducation: University of Glasgow, Balliol College, OxfordPublished Works: The Theory of Moral Sentiments (1759), The Wealth of Nations (1776)Notable Quote: Every individual†¦ neither intends to promote the public interest, nor knows how much he is promoting it†¦he intends only his own security; and by directing that industry in such a manner as its produce may be of the greatest value, he intends only his own gain, and he is in this, as in many other cases, led by an invisible hand to promote an end which was no part of his intention. Early Years and Education Smith was born in 1723 in Kirkcaldy, Scotland, where his widowed mother raised him. At age 14, as was the usual practice, he entered the University of Glasgow on a scholarship. He later attended Balliol College at Oxford, graduating with extensive knowledge of European literature. He returned home and delivered a series of well-received lectures at Glasgow University, which appointed him first as the chair of logic in 1751 and then chair of moral philosophy in 1752. Founding Father of Economics Smith is often described as the founding father of economics. A great deal of what is now considered standard belief about the theory about markets was developed by Smith. He explained his theories in Theory of Moral Sentiments, published in 1759. In 1776, he published his masterpiece, An Inquiry into the Nature and Causes of the Wealth of Nations, which today is generally called The Wealth of Nations. In Theory of Moral Sentiments, Smith developed the foundation for a general system of morals. It is a very important text in the history of moral and political thought. It provides the ethical, philosophical, psychological, and methodological underpinnings to Smiths later works. ​ In this work, Smith stated that man was self-interested and self-commanded. Individual freedom, according to Smith, is rooted in self-reliance, the ability of an individual to pursue his self-interest while commanding himself based on the principles of natural law. The Wealth of Nations The Wealth of Nations is actually a five-book series and considered to be the first modern work in the field of economics. Using very detailed examples, Smith attempted to reveal the nature and cause of a nations prosperity. Through his examination, he developed a critique of the economic system. Most commonly known are Smiths critique of mercantilism and his concept of the invisible  hand, which guides economic activity. In explaining this theory, Smith stated that wealthy individuals are: ...led by an  invisible hand  to make nearly the same distribution of the necessaries of life, which would have been made, had the earth been divided into equal portions among all its inhabitants, and thus without intending it, without knowing it, advance the interest of the society. What led Smith to this remarkable conclusion was his recognition that wealthy people dont live in a vacuum: they need to pay (and thus feed) the individuals who grow their food, manufacture their household items, and toil as their servants. Simply put, they cant keep all the money for themselves. Smiths arguments are still used and cited today in debates. Not everyone agrees with Smiths ideas. Many see Smith as an advocate of ruthless individualism. Regardless of how Smiths ideas are viewed, The Wealth of Nations is considered to be, and is arguably, the most important book on the subject ever published. Without a doubt, it is the most seminal text in the field of free-market capitalism. Later Years and Death After living in both France and London for a time, Smith returned to Scotland in 1778 when he was appointed the commissioner of customs for Edinburgh. Smith died on July 17, 1790, in Edinburgh and was buried in the Canongate churchyard. Legacy Smiths work had a profound effect on the American  founding fathers  and the nations economic system. Instead of founding the United States on the idea of mercantilism and creating a culture of  high tariffs  to protect local interests, many key leaders, including  James Madison  and Hamilton, espoused the ideas of free trade and limited government intervention. In fact, Hamilton, in his Report on Manufacturers espoused a number of theories first stated by Smith. These theories stressed the need to cultivate the extensive land that was available in America to create a wealth of capital through labor, distrust of inherited titles and nobility, and the establishment of a military to protect the land against foreign intrusions. Sources â€Å"Adam Smith.†Ã‚  Econlib.Brett, Sarah, and Oxford University Press. â€Å"Adam Smith (1723-90).†Ã‚  Oxford University Press | Online Resource Centre.Founders Online. Alexander Hamiltons Final Version of the Report on the Subject of the Manufactures.  National Archives and Records Administration, National Archives and Records Administration.

Contemporary issues in conflict and security Case Study

Contemporary issues in conflict and security - Case Study Example Terrorism poses threat to societal gains as wells lives of the people in the society. The interest in discussing this issue lies in the fact that it conflict human security interest. Crenshaw (2009:383), believe that the causes of terrorism fall into two categories. First, societal setting creates permissive conditions, which promote terrorism. Modernisation is one of the permissive conditions, which creates interrelated factors that support the terrorism activities. Communication and transportation are crucial to terrorism activities because they allow the terror groups to improve their networks and extend their activities across the world. For instance, train bombing in Spain in 2001, depicts how networking and transportation allow terror activities to expand their roots in the society. Crenshaw (2009:381), argues that terrorist activities observed in the historical Russia in 1890s and the modern terrorist observed in Spain in 2001 depend on modernisation in executing their ills. The fear that the society harbours today is potentiality of the terror groups, using the modern nuclear technology to execute their plots. Crenshaw (2009:382), posit that urbanisation is an aspect of modernisation that create permissive situations for terror activities. The concept of terrorism in relation to urbanization traces its roots in 1960s in Latin America where urban war fair first appeared. She points out that cities became the central point for terror activities. Various scholars have given their explanation in relation to cities as target places for terror activities (Bjorgo, 2005:123). Largely, these arguments describe the urbanisation effects as weaknesses that create permissive conditions for terror activities in the cities. For instance over population create conditions of low lifestyle, economic constraints, among other factors, which lead to criminal activities. The criminal hideouts in the shanties permit the

Nurses Role in the Field of Health Care Essay Example | Topics and Well Written Essays - 750 words

Nurses Role in the Field of Health Care - Essay Example Professional nurses require a legal system that regulates their professional and or ethical activity. In addition, there are professional bodies that are responsible for admitting different professionals into the mainstream practice after training and certification. Nursing regulatory bodies admit these professionals into the profession after assessing and evaluating their suitability to become professional nurses. Professional nursing and Nursing stereotypes A professional nurse should embrace patients as well as the loved ones/caretakers in good faith. They should not only be willing but love their work to succeed in caring for patients. Services to patients should be put first before any other thing, financial interest included. In addition, nurses need to be presentable at all times (Allen, 2001). The appearance of a nurse should always be pleasant to everyone as this will be interpretive of the quality of service he offers. Nursing has been invariantly labeled as a career for th e feminine. The public views this profession as a reserve for the female gender and should not be ventured into by the males. In fact, some of the male nurses have been labeled as pansy and their sexual orientation questioned. Moreover, nurses are also viewed as subservient compared to the medical professionals and often seen as sub-standard workers to the physicians and effeminate type casting on the male nurses. Plainly speaking, nursing is not entirely a feminine affair. Both males and females have the capability to pursue this career as a choice. Secondly, nursing complements other healthcare skills and not necessarily subservient to them. Without nursing, the role and successes of the medical doctors are largely limited and may hardly operate. It is important to note that the disciplines in the medical loci are intertwined in terms of roles and none is subservient to the other. Role of Nurses Unknown To the Public A nurse acts as the patient’s advocate. For instance, a n urse will always support the needs of a patient first. The public is usually unaware of this role of nurses. Secondly, unaware to the public, nurses are involved in the spiritual wellbeing of the patient. It is quite essential that patients are counseled and guided spiritually according to their beliefs; such acts would include bible discussion and spiritual uplifting through prayers and meditation, depending on the beliefs of the patient in question. Among nursing theorist that are real role models to current and aspiring nurses is Dorothea Orem. This assertion is due to fact that many nurses always embrace her theory of â€Å"self-care being a basic human requirement.† Orea asserts that people are distinct individuals and should be primarily responsible for their own care before eventually â€Å"devolving† care to other members of the society (Gordon, 2005). Nurses and Medical Doctors At personal levels, many nurses do not confide to the opinion that nursing as a car eer merely involves following up instructions from doctors. Instead they implement the instructions given to them by doctors. This function they do not do blindly but in line with their professional skills and trainings. They are not being ordered on what to do; rather, they already have the knowledge of everything required of them (Larrabbee, 2009). Nurses are also responsible of the well-being of their patients (Nettina, 2001). In fact, the recovery of patient

E-marketing assignment on Olympics Web TV Essay

E-marketing assignment on Olympics Web TV - Essay Example As a new company Olympics Web TV will have strengths with regards to its marketing mix on product, place, promotion, people and physical evidence. From the outset the product will be specifically designed for online delivery and as such the organisation can easily personalise their product to different consumer tastes and also avoid the costly challenges that its multi-delivery competitors faced in migrating their offerings to the Web. This focused-delivery mode will result in huge savings for Olympics Web TV especially in terms of infrastructure needed to operate. Olympics Web TV could use the new computing paradigms such as cloud computing to convert capital expenditure into operating expenditure, and easily scale their offering as and when required thus maximising on investment for product innovation. As an Internet-provisioned product, Olympics Web TV will be cheap to distribute and cost comparatively less to promote in comparison to non-Internet enabled TV products. Finally, online provisioned products have significantly less human resource requirements and less investment in physical evidence. These shall provide Olympics Web TV with huge savings as well. Olympics Web TV weaknesses shall mainly be encountered in its marketing mix under price and processes. The greatest cost for online TV is content licensing. As a new company Olympics Web TV may not have the huge resources required to compete with incumbents in securing the lucrative Olympics licensing rights. Moreover, the incumbents, such as the BBC and ITV, have the advantage of having had previous relationships with several key content providers such as movie rights, International Olympics Committee (IOC), FIFA and so on. Secondly, streaming video has an impact on customer Internet usage and, thus, increases cost of service to the consumer. With regards to processes, online TV has got lower switching costs in comparison to say, cable TV thus Olympics Web TV will have to ensure that its processes operate at optimal efficiency around the clock. As a new player, Olympics Web TV does not own or have access to significant existing infrastructure and this may have a negative impact on i ts processes. In spite of the above weaknesses, there are a number of opportunities that Olympic Web TV could exploit to create sustainable competitive advantages. For starters, the global trend towards increased online video streaming and Internet usage is an emerging market that provides an almost equal and open platform for new and established players to be innovative. Secondly, unlike its competitors, BBC and ITV, Olympics Web TV can easily enter into joint affiliations and partnerships even with both organisations and end up leveraging their content to its advantage. The large industry players are more likely to enter into joint affiliations and partnerships with small organizations than with each other. All said Olympics Web TV must also be wary of the following threats: (1) the impact pirated content has on the video streaming culture; (2) competition from emerging services such as Apple’s iTunes and also from existing video-streaming service providers such as YouTube; and (3) the non-competitive practices of large incumbents with deep pockets. Competitor analysis According to Porter (1998) competitor analysis involves looking at: the competitor’s objectives, competitor’s assumptions, competitor’s strategy and competitor’

Culture Diversity Within Ryanair

Culture Diversity Within Ryanair Main purpose of this assignment to show the importance of Ryan air airline management and leadership across culture. In this assignment I am going to show the theories of leadership and motivation and different leadership styles across different culture and different motivation technique across different culture, motivate across a different culture , the theories of leadership and motivation, different leadership styles across different culture , Manage culture diversity within an organisation, theories relating managing culture diversity, different needs and expectations culturally diverse guests, techniques for managing and building team with a culture diverse workforce of Ryanair Please do not refer to first person (I) Introduction Ryanair is the worlds most wanted airline working near fifteen hundred flights per day from low cost directions across twenty eight countries, involving over 168 terminuses. It was set up in 1985 Ryanair has a team of more than 8,500 people and assumes to carry over 80 million travellers in the present economic time. Its head office is located at Dublin Airport with its primary operational bases at Dublin and London Stansted Airports. It is Europes largest low cost airline and one of the most commercial, In spite of the hard business environment in which Ryan air worked in both 2011 and 2012, the airline has been characterized by rapid expansion, a result of the deregulationof the aviation industry in Europe in 1997 and the success of its low-cost business model. It was one of the first independent airlines in Ireland. In 2001, many believed that Ryan air was like the Wal-Mart and Southwest Airlines of Europe Barret, S. D. (2004) Task 1 Chapter 1 Lead and motivate across a different culture All cultures have beliefs which are mutual for all people in that culture. Many beliefs have same values consequently there are some arguments that no need to learn Indian cultural beliefs and American cultural beliefs. Equally both countries hold morality as faith in their culture no need to check it people only need to understand how these values are bought out in toward life over activities, manners, beliefs . In the modern age of enterprise culture, aggressive competition and strategic leadership for effectiveness in the market, Ryanair has structured its leadership and business classic to report the subjects of organizes an commercial method to the management of organisations for a transformational method established upon achievement. For Ryanair, these issues discovery expression in low-cost and generic factors. Basically these factors are answerable for Ryanairs success occurrence. In catching this transformational, change-oriented quantity of Ryanair. A distressing business ideal tests the strategies used by the present well-established organisations in the market. Its main attention is on price understanding of customers. , noticing these things that Michael OLeary, the CEO of Ryanair has been at the centre of economy and low-cost revolt that has produced an detonation in the airline industry. Ryanairs leadership success is contingent on the economic condition in the United Kingdom i n the stir of the de ruling strategy that allowed new entrants into the aircraft industry thereby opening the rule that completed air manageable partial preserve of the rich class, and the inflexible commercial spirit that OLeary displays(Arredondo, P., 2011) Motivation is a massive matter. The base of motivation may change in people. In the determination location, many have self-confidence in that the side by side of agreement at work is a durable negotiator. It is true that people alter throughout their life. A person who once was motivated by change may or not like it any shorter. Though, the person who beloveds lifelessness may essential to involvement alteration to obtain almost different in their lives, fairly new than what they been doing for many, several years. 1.1 Theories of leadership and motivation (Ryanair ) Interest in leadership improved for the period of the early twentieth century. Early leadership theories motivated on abilities notable between leaders and followers, whereas following theories considered at other variables such as situational features and proficiency levels. Although many diverse leadership theories have occurred, maximum can be confidential 1. Contingency Theories: Contingency theories of leadership focus on certain variables associated to the atmosphere that might determine which particular style of leadership is best appropriate for the condition. According to this theory, no leadership style is best in all states. Success is determined by a number of variables, including the leadership style, qualities of the followers and aspects of the situation. Contingency theory adopts no one accurate way to lead will fit all conditions. In this approach states that there is no perfect way to lead an establishment rather situations govern the way to lead at an assumed time. In addition, there is a serious correlation or affinity between situational and contingency theory of leadership. Both suggest that sets of structure to lead depend on the problem at hand. Contingency theory is a class of behavioural theory that claims that there is no best method to Ryanair or leads a government. Instead, the ideal progression of action is c ontingent on the internal and external factors or conditions. Thus, contingency approach to leadership pressures related factors as significant influence on leader success. Bass, B. M. (1985 4. Situational Theories: Situational theories recommend that leaders preference the best classification of attainment based upon situational variables. Different styles of leadership of Ryanair may be more appropriate for positive types of decision-making. That anxieties follower development, an extension, the point actuality strained is that there is a break from organizational model scientific management largely mistreated the impacts of the environmental factors as well as encouraged vertical management structure, a departure from flat management arrangement. Ryanairs contingency or situational leadership, the symbol is that it is based upon leader-match theory, Theories of Motivation Motivation is the different, internal method that strengthens, leads, and sustains behaviour. It is an individual strength that bases one to perform in a particular way .Most often, motivation is the term used to explain peoples behaviour. Effective directors are said to be highly encouraged. A team leader who eludes work is said to be unmotivated Equity Theory: Motivation theories can help directors understand how to motivate their staff. The equity theory of motivation is based on the fact that individuals are inspired first to achieve and then to preserve a sense of impartiality. Equity refers to the distribution of rewards in direct equality to the contribution of each employee to the organization (Ryan air). Everyone needs not to receive the same rewards, but the rewards should be in accordance with individual contributions. The idea of equity likes a development of an input-to-outcome ratio. Alavi, M (2000), Expectancy Theory: Expectancy theory, industrialized by Captor opportunity is a very difficult prototypical of incentive that is based on an uncertain assumption. According to expectancy theory, motivation is dependent on how much want something and on how likely to become it. Ryan air airline sales subjects managers who are applicants for advancement to one sales reservations managers job. Ryanair has had a very good sales year and always get good performance evaluations.D.R., 1997 Reinforcement Theory Reinforcement theory states that behavior that is pleased it is likely to be repeated, although behavior that has been criticized is less likely to remain. Ryan airs is a non-additional airline but it has a high business the assistant general Secretary Ryan air has a very suppressive government and they have very high staff income Ryan air and as result the company is recruiting now agreement labor from activities as far away .Pilots were lately told that in order to development from older airplanes to original aircraft 1.2 Different leadership styles across different culture Nowadays, people from different cultures and value systems are appointed by the business organizations across the world. Western leadership style is supplementary of a participative style somewhere the manager contains his team followers to a positive point in result making. But, in Asia the leadership style is a combination of autocratic and transactional leaderships. An effective leader who arrangements with another culture should recognize their work related social and cultural values to achieve business success. He should also have the ability to organize and main a workforce of diverse cultures. Mosakowski, E, (2000) The leadership style OLeary has started at Ryanair good deal form in a grouping of translation a movement from autocratic leadership to democratic one. Major styles of leadership democratic participative, autocratic repressive and laissez faire representative. OLeary has expanded the leadership base at the top organisation unit from. It is significant to communication that OLearys leadership style has to experience this evolution from 1988 till present in order to recover the then injured, unknown airline, Ryanair, from dripping cash and this essential aggressiveness, confidence, style of leadership that concluded in low cost and non-additional method. OLearys leadership structure as at when he joint Ryanair in 1988 as Tony Ryans particular enforcer to 1994 when he became the CEO of the airline and now has experienced distinction to ensemble different situations. Different leadership styles are desirable to manage with different situations the autocratic style marks logic when an ass ociation is in deep anxiety and needs to complete an express improvement that style would be counter productive when the association is in a growth situation Green, S. G. (2002 Ryanairs leadership style has developed the European air company industry has been unfavourably re-joined. Leadership change is primarily a function of leadership style. Also, it is doubtful from the analysis presented Ryanairs success story is blocked in its leadership style, which has observed a sort of evolution from autocratic to democratic. And the leadership theory that marks the possibility of this new organizational culture change is administered Therefore, even though OLearys leadership model has been successful, it is essentially contingent upon the deregulation strategy in place since its founding. In addition, in order to withstand this administrative success, Ryanair requirements to gain the opposition in the airline industry and alters itself for sustainability. 1.3 Different motivations across different culture Motivation has kept people in emergencies accepted during times. It has been the basis of improved principles of living, achievement, prosperity, and approval. Most leaders concluded olden days have used irregular systems of motivation. The same is accurate of successful managers. The role of motivation in the work environment has great value. Many readings have developed from one place to another various motivational techniques for leading employees towards desired goals. The success or failure of motivation time-outs not on the system itself but on managements capability to like the wants of people with appropriate rewards Objects are needs, which force people to move towards goals. Many theories of motivation have been established with the thoughtful of how workers performances can be strengthened confidently and how they can improve and focused to accomplish favourite ideas. Motivation training in diverse culture needs ID of the positive and negative culture based-factors. Grant, R.M. 2002, Contemporary concepts of culture Several organization examiners contributed to the opinion that perceives culture as- a mutual similar way of existence, calculating and doing which are ideas, shared by members of a cultural group. Culture involves of designs, clear and unspoken of and for behaviour acquired and conducted by signs, establishing the unique successes of human groups, including their expressions in objects; the important basic of culture involves of customs practices that only come into existence in relation to, and in contrast with, other cultural groups. Differences in cultural principles need additional skill when trying to motivate changes in Behaviour. Managers of Ryanair want to correctly understand the condition and strategy an approach that turns a persons morals and needs. The theory of motivation recommends that people are motivated to do belongings as of external honors. Humanistic Theory of Motivation: Humanistic theories of motivation are founded on the knowledge that people also have strong Perceptive clarifications to perform various actions. Once the minor level requests have been seen, the main motivator converts the requirement for the desire to fulfill ones specific possible Adapting to Environments Ryan air managers are said to be highly motivated. A team leader who circumvents work is said to be unenthusiastic. Many workers from the United Kingdom have port their occupations with Ryan air and as result the company is employing now contract labor from agencies. Pilots were newly told that in order to progress from older planes to newer aircraft, they would have to compensation for their own retraining. Politis, J. D. (2004 1.4 leadership strategies for an organization that operates across different culture Organizations are motivated by expert leadership to display them over unsurpassed modifications. Some of the best and most appreciated managements are weakening to adapt to change, implement their strategic plans successfully or prepare for a more indeterminate future. Many top directors complain the lack of leadership worktable strength in their companies and sensation what will happen every leader is conscious of the value of a precise business strategy. Without proper leadership, even the best and courageous strategies die on the plant, their probable never understood. The skill of an association to attain its areas does not be dependent completely on the strong point of will of an only great leader, even upon the efficiency of the organizations restraint of knowledge. A good leadership strategy takes all of these factors into explanation Politis, J. D. (2004 Strategic Leadership is a development, which certifications organisation to be active rather than reactive in shaping its own future. A concentrating organizational lead affords and launches unworkable leadership to Ryanair. A good organisational leader progresses a positive scheme to strategic management, where the management rather than just identifying and answering to alteration. The change in business environment unfair the strategy of Ryanair. New markets or introducing a new service and it also created sources of innovation like a change in market structure, Tie Leadership Development to Business Strategy. Leadership development should originate and end with the businesss strategy and objectives in mind. The respondents well-known that the establishment of an cohesive strategy and system for all managerial development was the leading significance of their learning and development establishments These results imitation an previous study as well Many corporate learning and development establishments The best businesses for leaders consistently execute on the strategies that make for good leadership development. They make enterprise wide standards, practices, and metrics for leadership;Martins, L.L. (1996) Organizational culture is the collective behavior of humans who are part of a society and the meanings that the people to their actions. Culture includes the organization values, visions, averages, working language attach, systems, symbols, principles. It is also the arrangement of such supportive behaviors and expectations that are taught to new executive members as a way of observing, and even thinking and sensation. Organizational culture moves the way people and collections interact with each other, with clients, and with sponsors Ryanair and Marketing Strategy Marketing strategy is very important in order to maintain modest advantage. It is important in order to maintain good relationship with the customers. This is mainly important in the service industry, as well as the hospitality and tourism sector. This is because of the fact that the entire industry is characterized by intensive competition, because of the growing number of competitors in the global market. In addition, the services actuality offered as well as the products being created are hard to differentiate, because the products and services to be offered towards the customers are practically the same Peterson, S. J. (2009) Ryanair were recognized by the Ryan family with an investment segment of a staff of 25. The company launched its first direction in July with daily flights which operate daily from Waterford in the southeast of Ireland to London Gatwick Ryanair is the worlds much-loved airline and works more than 1500 flights daily from 44 sources and more than 1100 low fare routes crossways more than 25 countries, which connect to over 160 terminuses. As a result, it is dynamic for company in this production the emergence of the Internet in the mid-1990s as well as the growth of Intranets and Extranets required airlines to progress their strategy on industrial innovations in order to increase their attractiveness. In addition, they progressively reinvented themselves to main technology suppliers for a wide range of tourism organisations including airlines, travel agencies and Internet travel portals. Cross-cultural understanding influences business relationships, and many training providers offer courses that outline the various basics of the cultural exchange and appropriate ways of doing business with abroad societies. Whilst this is highly applicable, it is valuable to specifically analyse the impact of cultural values on business performs in the tourism industry. Task 2 Chapter 2 Manage culture diversity within an organisation Diversity is much wider topic today Diversity is strangeness or those human capacities that are diverse from outside the sets, to which we belong, yet present in other individuals and groups. Its important to appreciate how these magnitudes affect presentation, inspiration, success, and interactions with others. Organized organizations and observes that have presented barriers to some dimensions of diversity should be examined, challenged, and removed.Diversity also incorporates a wide variety of other differences, including work experience, parental status, educational background, and managing diversity means more than simply observing legal and policy requirements. Managing diversity is defined as planning and executing administrative systems and performs to manage people so that the potential advantages of diversity are maximized Thomas, R.R., 1996 Managing Diversity. Managing diversity means identifying peoples alterations and make out these differences as valuable it improves good organization like Ryanair practices by stopping perception and promoting inclusiveness. Companies should completely redesign the working culture that make possible the scheming of a wide collection of posts that leads to give definition of how work gets done and how diverse markets are approached. All workforces should be held responsible for their performances and human resources results. Companies must create a post bureaucratic organization based upon trust and admiration in which diverse employees are valued and integrated into all aspects of the work. Diversity increases inspiration and innovation and advantages. Diversity helps administrations for inflowing the global arena. Diverse groups mark it possible to improve elasticity and fast reply to change. The cultural impact on management is exposed by humble ethics, attitudes, and beliefs of the people. Culture can mark skill allocation, managerial attitudes, managerial ideology and even government-business relationships. Hall, T. (2005 Managing Cultural Diversity: To manage successfully in a global diverse environment, that essential to identify the differences and learn to use them to improvement, reasonably simply allowing differences to cause difficulties somewhat directors should be skilled how to respect the differences at work and how to work with them to maximize the contribution of each employee, It is a global and diverse company, which works individuals of all confidences. To reproduce the protracted collection of principles followed by their employees they provide prayer facilities across the business and publish religious festivals information sheet on intranet site with the aim of raising awareness on the different cultures across the company. Some religions or beliefs have specific food needs. Ryanair provide a variety of dietary selections to confirm key rations are provided for and foods are considered. In addition, the Ryanair Uniform Committee has adapted the new uniform to ensure that it sustains the company image whilst allowing flexibility to meet key religious needs. Peterson, S. J. (2009) The Employment Equality (Age) Regulations have had a great impression through the Ryanair airline. Prior to the regulation, Ryanair ran attention assemblies to estimate workers views on the changes. There was an extensive choice of answers, maximum persons sensed that the age regulation was an optimistic period and that flexibility was the key to working for longer. Ryanair is working closely with the construction of Terminal 5 to confirm all phases of disability are protected. As a company they are dedicated to confirming that controlled employees can attain their full conceivable. Practical alterations are completed for employees if they are disabled to become disabled whilst working for Ryanair. They work in partnership with the Employers Setting on Disability. They also work with the Disability Rights Commission to support their disability strategy. Flexible working has become significant part of the technique they (Ryanair) work and represents part of a current change of attitude. Ryanair has introduced a number of elastic working enterprises that have progressive women who tend to undertake responsibility for most dependent care. One objective is to increase the focus on work-life balance to encourage women to return near work after maternity leave. It is a priority of our race equality strategy to listen to their ethnic minority employees. Ryanair encourage sharing ideas on how they can work on issues such as career progression, training and development, internal and external recruitment, harassment and bullying. Milliken, F.J.1996 2.1 Theories relating managing culture diversity Workforce diversity is a difficult work to achieve in an establishment. The organization of workforce diversity as a device to raise administrative success cannot be highlighted, especially with modern alterations wide crossways the world Workforce diversity is a main anxiety for maximise of the trades. Workforce diversity, incapacity, old age, human resource management, equal opportunity. The increased flexibility and contact of people from assorted circumstances as a result of better-quality economic and political systems and the acknowledgment of human rights has put most organizations under burden to hold diversity at the work place. The idea of diversity management of Ryanair increased kindness with globalisation and the requirement for more families to banquet globally to influence customers across the world. D.R., (1997) Managing diversity make a modest benefit to Ryanair. Possible benefits of this diversity contain well choices, more achievement in advertising to external and national cultural sectional groups, and an improved passage of economic chance culturally diverse groups comparative to similar groups are new active both in the contact method and work presentation these assistances arise after a diverse group has been together for old-fashioned. Ryanair succeed at diversity if the creativity to make, achieve and price the diverse workforce has the full sustenance of the highest management The organization must connect and worries for diversity to human resource management choices around staffing, group, project, sequence planning, presentation administration, and Managers must know their companys culture principal and then contrivance diversity plans allowing to that culture Diversity of Ryanair in administrations has its assistances but there are some disadvantages of workforce diversity. Some people feel helpless by working with people of a different age, sex, or culture. There is a rise in the cost of training. This increase originates from prices related with meetings, programs and addresses specified to encourage diversity in the company Theories of cultural values Mainly in the workplace, minions expect to be referred. In cultures with a high control distance, dissimilarity is more broadly recognised and power, which is thought by a marginal, is known by the needy majority of people. In a more manly culture leaders are expected to be critical and forceful and struggle is committed by aggressive Uncertainty deterrence rises to the vital for instructions and principles. Weak uncertainty avoidance comprises incentive by attainment and inspiration of inventive ideas and performance. Strong uncertainty escaping specifies a need for rules and some battle to state-of-the-art designs and behaviour. Motivation by safety is likely to be established in civilizations indicating strong uncertainty avoidance. Milliken, F.J.1996 2.2 Different needs and expectations culturally diverse guests Elastic working has becomean important part of the way Ryanair work and signifies part of an on-going change of attitude. There are clear benefits for passengers and for their business and they will continue to support flexible occupied solutions that are appropriate and meet our needs. They support a wide variety of elastic working possibilities that are aimed to meet different types of work. These solutions assist the employee to balance home and work life whilst contributing to the on-going changes wished by the organisation to assist cost reduction.Free and incapacity facilities governments essential to reflect the variety of their clients values, beliefs and cultural expectations. Religious practice Communal and debility facilities workers need to be watchful to the conceivable changes in sacred formal and the influence of a beings religious practice on their politics and value system. Central faith of Ryan air may admiration other beliefs as cults somewhat than official religions however people of any belief have a right to respect.Turner, J., 1985 Incapacity Ryan air needs to contemplate different cultural views of disability and look after of family members with incapacity, positioning the person before the disability, and facilities for people with a disability. Focus on the person, not the disability. Work performs may need to be modified to permit for dissimilar national views and conventions main contact and corporal exchange with the opposite gender. Culturally comprehensive practice It is impractical to assume public and disability services workforces at Ryan air to differentiate the cultural in a fast increasing and extremely modest global market, and in contradiction of the background of the current challenging economic climate, the pursuit of quality has become an organisational imperative for leisure industry trades. Different acuities of quality, yet, make its realisation more problematic, not least since of the very nature of the persons within the market the staff within vacation industry businesses and guests. Lawson, R., 2002 The relationship between cultural realization and superiority There is a correlation between the equal of national realization of the travel business and the following perception of product, service quality on the part of the tourist. Increased customer satisfaction is likely to follow as a result of improved staff cultural awareness and following development of ethnically appropriate products and services. It is significant for tourism businesses and purposes to take this into account in the provision of products and services. Cross-cultural understanding influences business relationships, and many training providers offer courses that outline the various basics of the cultural exchange and appropriate ways of doing business with abroad societies. Whilst this is highly applicable, it is valuable to specifically analyse the impact of cultural values on business performs in the tourism industry. Wendy. (2004, March Undoubtedly the tourism industry and culture are inextricably linked in that it is often the search for a cultural exchange that is an inherent part of the motivation for the tourist to travel. As already illustrated, to meet expectations there is a need for cultural awareness, both on the part of the individuals travelling and, equally importantly, tourism businesses. Customer loyalty is often affected by the perception of the level of service provision. Another aspect of culture is body language and whilst subtle, it is easily possible to offend through inappropriate gestures that demonstrate a lack of respect and subsequently undermine the business relationship. The National Centre for Languages stresses the requirement for cultural skills in business, specifically the tourism industry, indicating that cultural and language skills are beneficial for, amongst others, hotel reception, tourist attraction and restaurant staff, in welcoming guests, dealing with enquiries, taking bookings and guiding visitors. 2.3 Techniques for managing and building team with a culture diverse workforce Teambuilding Insignificant businesses depend on teamwork, objective as significant as their improved accompaniments. When a minor group of people starts employed to near common goals and making results that improve up to more than the amount of the portions, it becomes a team. Positive team employed gets consequences in all areas, including auctions, IT, problem solving and handling new projects. People work more effectively and their inspiration and loyalty to business are also increased. Starting and conference the team, important sides, Positive side assemblies, solving problems. Cultural Diversity in the Workplace, Paglis, L. L. (2002) gradually various incomplete work to the globalization of profitable, nationwide competence is conceivably the most leading ability for effective work presentation in this century. Social competence is the ability to collaborate successfully with persons from different beliefs. This capability of Ryanair is needy on awareness of ones own cultural worldview, information of worldviews, compliant to cultural variations, and multicultural services. Managing culture diverse workforce Developed cultural capability consequences in capability to appreciate, connect with, and efficiently cooperate with peoples crossways cultures, work with varying culture calendar Communication:Providing evidence precisely and punctually is dangerous to effective effort and team presentation.

Compare and contrast two poems that contain different representations :: English Literature:

Compare and contrast two poems that contain different representations of school pupils. 'Comprehensive' is a representation of a comprehensive school, in the way that the diverse mixture of cultures are included in the poem. Each pupil has a different life and culture, and the pitfalls of comprehensive schools are clearly shown by the way in which each pupil is represented. The first pupil is African, and homesick, and is not happy in England. It seems as though she misses her culture, and feels as though she is being stifled by the British culture. This is also true of 'In Which The Ancient History I learn Is Not My Own.' The boy represented in this poem is homesick, and also feels stifled by the British culture, due to the fact that he is being almost forced into it, thus not allowing him to enjoy his own Irish culture. The teacher wants him to learn 'The English Kings, the famous battles and God's grace in History' which causes him to begin to forget his own History, which he is desperately trying to hold on to. The second pupil in 'Comprehensive' is a boy named 'Wayne,' who is depicted as a stereotypical boy. He is precocious in the way he thinks he is 'too old for games' and believes he is old enough to support something so controversial, when clearly he does not understand it to a full extent. He holds a very patriarchal view, especially when it comes to women. He believes that they are there to have their knickers pulled down, as it were and cook for him. Such a strong attitude as this for a pupil of only fourteen years of age inevitably will cause friction between him and his peers and teachers. And in a school of mixed culture, this would not bode well. Although the teacher has not such a derogatory attitude as Wayne, she is similar in the way that she has very strong views that she places upon the young Irish boy in, 'In Which The Ancient History Is Not My Own.' The Teacher is very patriotic, and expects the pupil of a completely different culture to be the same about England. An example of this is when the teacher describes the Roman Empire as 'the greatest Empire ever known- until our time of course.' This is the kind of attitude that is almost stripping the boy of his patriotism of his own land, and restricting him from learn about his own History. He has had to take on another cultures history and been forced to take it on as his own. Similarities can be made between the young Irish boy and 'Ejaz' and

Principles of Dimensional Modeling

Dimensional modeling is system of a logical design used by several data warehouse designers for their commercial OLAP products. DM is considered to be the single practicable technique for databases that are intended to support end-user queries in a data warehouse. It is quite dissimilar from entity-relation modeling. Though ER is very functional for the transaction capture and the data administration phases of creating a data warehouse, but it should be shunned for end-user delivery.This paper explains the dimensional modeling and how dimensional modeling technique varies/ contrasts with ER models. Dimensional Modeling technique is a preferred choice in data warehousing. Basically, it is a technique of logical design which presents the data in a standard, intuitive framework that allows for high-performance access. It is intrinsically dimensional, and it sticks on to a discipline that uses the relational model with some significant restrictions.In each DM, there is one table with a m ultiple key, called the fact table, and a set of smaller tables called dimension tables. Each dimension table consists of a single-part primary key that corresponds precisely to one of the components of the multipart key in the fact table. This characteristic of star-like structure is generally called a star join. Due to multipart primary key made up of two or more foreign keys in fact table, it always articulates a many-to-many relationship.The most valuable fact tables include one or more numerical measures that crop up for the permutation of keys that delineate each record. Dimension tables have explanatory textual information. Dimension attributes are used as the source of most of the interesting constraints in data warehouse queries, and they are virtually always the source of the row headers in the SQL answer set. Dimension Attributes are the various columns in a dimension table. In the Location dimension, the attributes can be Location Code, State, Country, Zip code.Normally the Dimension Attributes are used in report labels, and query constraints such as where ‘Country=US'. The dimension attributes also contain one or more hierarchical relationships. One has to decide the subjects before designing a data warehouse. In DM, a model of tables and relations is constituted with the purpose of optimizing decision support query performance in relational databases, relative to a measurement or set of measurements of the outcomes of the business process being modeled.Whereas, conventional E-R models are composed to eradicate redundancy in the data model, to facilitate retrieval of individual records having certain critical identifiers, and therefore, optimize On-line Transaction Processing (OLTP) performance. The grain of the fact table is usually a quantitative measurement of the outcome of the business process being analyzed in a DM. The dimension tables are generally composed of attributes measured on some discrete category scale that describe, qualify , locate, or constrain the fact table quantitative measurements.Ralph Kimball views that the data warehouse should always be modeled using a DM/star schema. Kimball has affirmed that though DM/star schemas have the better performance in comparison to E-R models, their use involves no loss of information, because any E-R model can be signified as a set of DM models without loss of information. In E-R models, normalization through addition of attributive and sub-type entities destroys the clean dimensional structure of star schemas and creates snowflakes, which, in general, slows down browsing performance.But in star schemas, browsing performance is protected by restricting the formal model to associative and fundamental entities, unless certain special conditions exist. The dimensional model has a numerous important data warehouse advantages which the ER model is deficient in. The dimensional model is an expected, standard outline. The wild variability of the structure of ER models m eans that each data warehouse needs custom, handwritten and tuned SQL. It also means that each schema, once it is tuned, is very vulnerable to changes in the user's querying habits, because such schemas are asymmetrical.By contrast, in a dimensional model all dimensions serve as equal entry points to the fact table. Changes in users' querying habits don't change the structure of the SQL or the standard ways of measuring and controlling performance (Ramon Barquin and Herb Edelstein, 1996). It can be concluded that dimensional modeling is the only feasible technique for designing end-user delivery databases. ER modeling beats end-user delivery and should not be used for this intention. ER modeling form the micro relationships among data elements thus it is not a proper business model (Ramon Barquin and Herb Edelstein, 1996).

Free Essays on Restaurant

I. INTRODUCTION: My research paper is about an evaluation of the Ayhan’s Shish Kebab Restaurant in attracting American customer (WS, pg: 110) lunch trade. The reason I’m interested in this topic is because I like to know why the restaurant is doing good business for a long time. I have some personal experience being a waitress, as well as an assistant manager in Ayhan’s shish Kebab Restaurant. Therefore, I can make some analysis (WS, pg: 16) on my experience and the reasons why the restaurant is attracting American customers. In my opinion, some reasons play the most significant role in success of the Ayhan's Shish Kebab Restaurant in regards to American customer lunch trade. Since Ayhan’s Shish Kebab Restaurant’s motto relies on customer satisfaction, it is better for me to use my marketing (WS, pg: 277) knowledge and my background to analyze some reasons. II. BACKGROUND SECTION: â€Å"Ayhan’s Shish Kebab Restaurant is mainly a Turkish restaurant. The restaurant has four different locations, all of which provide a wide variety of menu and serve quality for reasonable prices.† (Canas, Interview, November 2002) Like Ayhan’s Shish Kebab Restaurant, â€Å" Turkish cuisine has the extra privilege of being at the cross-roads of the far East and the Mediterranean†¦Ã¢â‚¬  (Plaza, 9) â€Å"†¦the Turkish cuisine is a rich and varied number of dishes, which can be prepared and combined with other dishes in meals of almost infinite variety, but always in a non-arbitrary way.† (Plaza, 15) â€Å" When meat is used, it is used sparingly. Even with the meat kebabs, the â€Å"pide† or the flat bread occupies the largest part of the portion along with vegetables or yogurt. (Plaza, 12) III. PERSONAL AND ACADEMIC ANALYSIS 1. Ayhan’s Shish Kebab Restaurant has success in attracting American customer lunch trade because of quality service (WS, pg: 389). According to my website: â€Å" The analogy works perfectly much like Mexicans i... Free Essays on Restaurant Free Essays on Restaurant I. INTRODUCTION: My research paper is about an evaluation of the Ayhan’s Shish Kebab Restaurant in attracting American customer (WS, pg: 110) lunch trade. The reason I’m interested in this topic is because I like to know why the restaurant is doing good business for a long time. I have some personal experience being a waitress, as well as an assistant manager in Ayhan’s shish Kebab Restaurant. Therefore, I can make some analysis (WS, pg: 16) on my experience and the reasons why the restaurant is attracting American customers. In my opinion, some reasons play the most significant role in success of the Ayhan's Shish Kebab Restaurant in regards to American customer lunch trade. Since Ayhan’s Shish Kebab Restaurant’s motto relies on customer satisfaction, it is better for me to use my marketing (WS, pg: 277) knowledge and my background to analyze some reasons. II. BACKGROUND SECTION: â€Å"Ayhan’s Shish Kebab Restaurant is mainly a Turkish restaurant. The restaurant has four different locations, all of which provide a wide variety of menu and serve quality for reasonable prices.† (Canas, Interview, November 2002) Like Ayhan’s Shish Kebab Restaurant, â€Å" Turkish cuisine has the extra privilege of being at the cross-roads of the far East and the Mediterranean†¦Ã¢â‚¬  (Plaza, 9) â€Å"†¦the Turkish cuisine is a rich and varied number of dishes, which can be prepared and combined with other dishes in meals of almost infinite variety, but always in a non-arbitrary way.† (Plaza, 15) â€Å" When meat is used, it is used sparingly. Even with the meat kebabs, the â€Å"pide† or the flat bread occupies the largest part of the portion along with vegetables or yogurt. (Plaza, 12) III. PERSONAL AND ACADEMIC ANALYSIS 1. Ayhan’s Shish Kebab Restaurant has success in attracting American customer lunch trade because of quality service (WS, pg: 389). According to my website: â€Å" The analogy works perfectly much like Mexicans i...

Quote The Raven The ABCs of Job Searching

Quote The Raven The ABCs of Job Searching TheJobNetwork’s expert advice series Quote the Raven, hosted by Raven Chiara and her special guests gives you the best advice on finding and keeping a job. In this episode, the team covers the ABC’s of Job Searching. A is for Apply when Appropriate:Don’t apply at work, dummy!Don’t send an email at 2am drunk, dummy! Use Boomerang for Gmail!B is for Bringing Your Best:Dress to impress for the interview, you shlub.C is for Customize Your Communication:Hot Tip!Take words from job description and snap, crackle, pop and sprinkle into your resume and cover letter.Don’t lie. You are not a good liar.Use some tools to pimp your resume ride, like etsy.com, fiverr.com, loftresume.comShare your thoughts with us†¦or your embarrassing job searching stories using #quotetheraven.Follow the hosts on   Twitter and Instagram @ravenchiara and @whybegee.

Health Reforms in USA Term Paper Example | Topics and Well Written Essays - 1000 words

Health Reforms in USA - Term Paper Example According to the research findings, it can, therefore, be said that similarly as in the US, China has also seen many health reforms in the last decade, but the grounds on the basis of which the reforms have been made in the two countries differ quite considerably. Whilst in China, securing people from financial shocks resulting from high medical costs was the reason; in America, the attention was focused on reducing expensive emergency care by increasing access to health insurance and thereby reducing the burden from providers’ shoulders. The healthcare system of US was declared as ‘broken’ in the 1990’s, and since then the health-related concerns have only risen. One essential healthcare system overhaul in the USA was the Patient Protection and Affordable Care Act (PPACA), signed by President Obama in 2010. Since it became law, US has observed great debate on the national level about the ‘Obamacare’ Act; a term coined by people against the pas sage of the Act who see the Act as bringing benefit not for the citizen but for Mr. Obama solitarily. Similarly, an appeal was filed in the world’s top court for the repealing of the law but the Court on ruled the Obamacare is upheld – the ruling to which Obama referred to as the victory for the people of America. Comparing the US healthcare structure with that of China, things are much different. Although major reforms have been made and efforts have been put in to ensure the delivery of better health services to the people of China, a vast proportion of the total population still lives far below national socioeconomic average. Of particular importance, among these reforms, is New Rural Co-operative Medical Care System (NRCMCS), a restructure overhaul for China’s healthcare arrangement initiated in 2005. The essential provisions of this system are that the burden of an average Chinese patient is not borne by the patient alone, rather it is divided among the Cen tral Government, Provincial Government and the patient himself, the ratio is 40%, 40%, and 20% respectively.

What Should Be The Policy of The Social Network Based Corporations on Research Paper

What Should Be The Policy of The Social Network Based Corporations on The Use of Internet For Illegal or Criminal Activities - Research Paper Example It can be affirmed that a well-built or a relevant internet policy plays an essential role for an organization to protect credential information from any external threat. Moreover, the intermediaries associated with social media services also incorporate adequate provisions that ensure to prohibit users to practice different illegal activities. In relation to the present day context of rapidly growing vulnerabilities, the social networking service providers are likely to develop effective privacy policies to prevent users from being affected with the conduct of various criminal and unlawful activities.Moreover, the internet service providers in the global domain tend to adopt along with implement highly developed privacy policies concerning easy accessibility of internet usage due to growing vulnerabilities. In this regard, the internet policies of the global marketers highly incorporate strong regulations in order to protect information of the social media users along with their cre dentials from external threats.... ime, it has been witnessed that a growing number of unlawful or criminal activities by the users are performed through different social media and blogging internet sites. In this present day scenario, it can be viewed that the users often face certain threats while performing different activities in the online social media networks. In this regard, the organizations such as Google, Facebook and Twitters among others are highly focused on building strict policies in order to prohibit the conduct of various illegal activities associated with terrorism, sexual abuse and other similar practices through social networks. The security policies of the present social media websites ensure to keep the track of each user, regarding their posts along with comments made by their peers and other suspicious users. The provisions underneath the privacy policy of the aforesaid organizations also incorporate adequate measure concerning age, gender along with other determinant factors for reducing pote ntial hazards from the criminal issues. With respect to the policies associated with privacy of user contents, the organizations also tend to conduct user verification process in order to keep adequate safety of information along with personal contents. Moreover, the process also enables the organizations to prevent the conduct of illegal activities through the usage of internet medium (Vacca, 2012). 4. Government Policy Options With regard to determine the phenomenon of extensively growing number of social media users, the governmental policies along with the regulations can be apparently observed to frequently involve continuous development in protecting the abusive use of internet. The federal law associated with the use of internet comprises numerous policies that ensure effective use

Argue a global issue presented in or surrounding your short story. How Research Paper

Argue a global issue presented in or surrounding your short story. How stereotyping or judging people affects our society. (base - Research Paper Example We find the women of the village adoring the man, seeing his lovely face and body. The physical qualities of the man makes women attached to him. Villagers translate his physical qualities into his personality (Rabassa, 2010). Women of the village feel sympathy for him and thinks how good it would have been if the man was alive. Villagers feel for the man who is dead. The village people arrange grand funeral arrangements for the man only because he is handsome. The modern world has the same mindset as the people of this village; stereotyping is the core concept that rules the world. Prejudice and stereotyping corrupts relationships. Multicultural societies are under the curse of prejudice and discrimination. Considering the United States as an example we can find that prejudice is the most crucial feature of the society. It is nothing but prejudice that has caused discrimination, oppression and tensions among various racial and ethnic classes in the United States (Forbes, 2010). Prej udice results in racial profiling, alienation, housing segregation, dangerous ethnic jokes and various other problems (GLIMUN, 2009). Prejudice demolishes all types of fellowships. No relationship would abide in the presence of prejudice. The very word racism is defined as a prejudice that makes the members of one race feel themselves intrinsically superior than the members of another race (GLIMUN, 2009). Prejudice reflects segregation, and it has completely blocked the progress of the nation. The term ‘prejudice’ now symbolically represents the life of the negatively privileged minorities in the United States. This strange racial prejudice has resulted into an isolated, ill developed and racially segregated society that has encouraged racial mistrust, senseless conflicts and other discriminations that prevents the society from obtaining true racial equality (United Nations, 2010). Prejudice hinders cooperation and mutual respect and destroys relationships. Prejudice di ssolves the good relationship between people of different race, ethnicity and nationality. Racial prejudice and segregation has resulted in systemic inequalities that stand as a barrier to the development (of the whole society) and personal improvement of individuals. Prejudice has contributed for the widening of the socio-economic gap between superior group (whites) and the minorities (blacks). Racial prejudice has led the nation to various curses like racial profiling. Racial profiling is an act from the side of police (or a private security practice) through which a person is religion unnecessarily suspected because of the inferior nature of his/her race, nationality, ethnicity or religion (Cole and Smith, 2010). Police officers often stop, check, and examine the vehicles of their victims (by force also) without any reason or proof about the misbehavior or criminality of the person (Cole and Smith, 2010) (Cleary, 2000). Racial profiling arises as a result of the wrong prejudice t hat the racially inferior people are likely to commit crimes (though it is not so). African-Americans and Latinos are the victims of racial profiling in most cases. Police has got a general belief that non-white people are mostly drug users and sellers. But studies (reports regarding police stops and checking) have revealed that people who are considered to be racially inferior

Reliability Issues †Centrifugal Slurry Pumps Essay Example for Free

Reliability Issues – Centrifugal Slurry Pumps Essay Introduction Pumps were probably the first machine ever developed, and are now the second most common machine in use around the world, out-numbered only by the electric motor. The very earliest type of pump is now known as a water wheel, Persian wheel or â€Å"noria†, consisting of a wheel of buckets that rotates to pick up water from a stream and dump it into a trough. Another early pump was the â€Å"Archimedean screw†, similar to the modern screw conveyor except that the flights were often fixed to the tube so that the whole arrangement would turn together. Both of these devices are still used, most commonly in basic agricultural applications. Pumps are now produced in an enormous range of types and sizes, for a very wide scope of applications, and this makes it difficult for any individual reference document or organisation to cover â€Å"pumps and pumping† as a general topic. So the broad field of pumping is classified into sub-divisions and then dealt with at that level. In the mining industry, the upper end of the pump scale includes impellers with diameters over 2.5m, slurry lines 10km long, particle size up to 100mm, flow rates handling more than 7000tph, and motors over 10MW. Finer slurries of around 1mm particle size are pumped for hundreds of kilometres in some operations. There are many ways to classify pumps. This just one of them. This document only addresses centrifugal pumps, with a focus on single-stage radial-flow slurry pumps. Centrifugal pumps are capable of meeting duties of up to 1.4 m /s at 30MPa, and higher volumes at lower 3 pressures. The maximum flow rate at low discharge pressure is about 180 m /s. Industrial applications requiring high delivery pressures generally use reciprocating fixed-displacement pumps, but they are limited in the amount of flow they can put out per unit. In general purpose applications, where different types of pumps could all deliver the performance sought, centrifugal pumps are usually the preferred choice due to lower lifecycle costs. Basic Requirements for Reliability Assuming correct pump manufacture and installation, the basic requirements for reliable long-term operation of centrifugal pumps are: 1. Continuous operation at best-efficiency point (BEP) 2. Adequate net positive suction head (NPSH) 3. Low velocity fluid flow within the pump and throughout the system 4. Processing of fluids that are benign ie: a) Chemically and physically stable b) At near-ambient temperatures c) Free of particles likely to cause wear or blockage Pumps of a basic design satisfying all these requirements have run for 50 years and more without major component replacement. The first three requirements are satisfied by matching pump performance to expected duty. Where item 4 cannot be addressed through pre-treatment of the fluid, the pump configuration, geometry and materials must be optimised to give best results. Obviously, item 4.c) is a dominating issue for slurry pumps as it cannot be eliminated and must be managed. Centrifugal Pump Construction Centrifugal pumps have two main sub-assemblies – the rotating parts (impeller, shaft, bearings), and the fixed parts (casing, piping connections, stand, foundations. Pumps of all types may be single stage or multi-stage. Multiple stages are used where it is not practical to generate the necessary discharge pressure using a single impeller. The simplest way to imagine a multi-stage pump is as one pump with its discharge feeding straight into the suction of a second pump so that the overall discharge pressure is increased while the flow rate stays the same. However, this arrangement is properly described as â€Å"single stage pumps in series†. A true multi-stage pump consists of multiple impellers mounted on a single shaft, positioned in a single casing made up of multiple chambers. Multi-stage pumps of this type are not used with slurries, but sometimes slurry pumps are mounted in series. Casing There are two types of casing designs â€Å"volute† and â€Å"diffuser†. A volute casing has a snail’s shell shape, while a diffuser casing has internal vanes. Diffuser casings are rarely used on single-stage radial pumps, and are not commonly used for handling slurries due to the flow restriction and high wear rates that would result. Slurry pumps have volute casings which house the impeller and have a spiral-shaped outer volume that extends 360 degrees and increases in cross-sectional area as it approaches the discharge flange. At full circle the volute overlaps itself, creating the cut-point, also known as â€Å"cut-water point† or â€Å"tongue†. The ideal shape is to have a steady linear increase in cross-sectional area for 360 degrees around the circumference starting from the cut-water point, but this can be difficult to manufacture. Compared to a clear water pump, a slurry pump has a much larger radial gap between cut-water point and impelle r, to reduce risk of blockage. Where a pump is identified as oversize for its duty, and is suffering high recirculation wear, it may be possible to fit liners with an extended cut-water point that throttles the flow. In theory, when a pump operates at its best efficiency point (BEP), the pressure acting on the impeller and casing are uniform. However, in practice the pressure is rarely completely uniform, and if a pump is operating away from its BEP the imbalanced in the radial forces acting on the impeller become significant. These forces are larger for bigger pumps operating at higher pressures. Running a large pump below rated capacity can create unbalanced radial forces that may (over time) damage the bearings or snap the shaft. If it is known that a pump may need to occasionally operate well away from its BEP, the manufacturer should include an oversize shaft arrangement in the design, but with commercial competition driving purchase decisions this may have to be specifically requested. Another option for reducing imbalanced radial forces is to use a twin-volute design, which consists of a wall splitting the volute in half for about half its circumference, ending after the cut-point but before the discharge flange. This is not practical for most slurry applications. Casings must be designed to allow the impeller to be installed inside, and so are manufactured in at least two parts. Solid casings have a removable cover, either on the suction side or shaft side or both, but the volute shape is a one-piece casting. Casings may also be split, either axially or radially. Axially split housings make inspection easier because the upper piece can usually be removed without disturbing the shaft or piping too much. Split casings may tend to â€Å"breathe† at high pressures, resulting in leakage, air entrainment, vibration, misalignment etc. Casings are normally provided with ribbing at the location of highest stresses, to minimise this. Open or semi-open impellers require close clearances against the casing to ensure pumping efficiency. The casings generally include a side-plate that can be adjusted for minimal clearance using jacking screws or shims, especially in wearing applications eg slurries. Impeller Impellers are classified according to their design features ie: ï‚ · Suction flow orientation o Single suction ie inlet on one side only o Double suction ie inlet on both sides ï‚ · The direction of exit flow relative to the shaft axis ie: o Radial flow o Axial flow o Mixed flow ï‚ · Vane shape ie: o Single curvature vanes, also called straight vanes – the impeller surfaces that accelerate the fluid are straight and parallel to the axis of rotation o Francis or screw vane – the surfaces that accelerate the fluid are curved in relation to the axis of rotation ï‚ · Mechanical construction o Enclosed ie with side walls or â€Å"shrouds† o Open ie no shrouds o Semi-open ie shroud on one side only o Partially shrouded ie shroud not extending to impeller tips The open area through which the fluid flows into the impeller is called the suction eye. For a closed-shroud impeller, this is simply the hole in the shroud. The suction eye area is an important featur e of the pump design. The area taken up by the shaft, if it protrudes through the eye, is deducted when calculating eye area. Impellers can be single suction or double suction. A single suction impeller has an inlet eye on one side only, with the shaft extending out the opposite side so the impeller overhangs. A double suction impeller can be thought of as two mirror-image single suction impellers mounted back-to-back. They accept fluid from both sides and usually have a shaft that extends straight through the impeller with bearings providing support on both sides. Double suction impellers are usually fed fluid from a single inlet flange, with the fluid flow being split into two streams by channelling inside the casing. Double suction units provide advantages in reduced fluid velocity at the impeller eye, and better balancing of axial hydraulic forces, while single suction units are simpler in design, manufacture and maintenance. Most if not all slurry pumps are single suction type. Some pumps may have an inducer, which is an axial flow impeller with a few blades installed between the suction inlet and the main impeller, intended to improve the suction head seen by the main impeller. Impeller shrouds often incorporate thin â€Å"pump-out vanes† cast into the outside of the shrouds. Their purpose is to help clear any solids from the back hub of the impeller (opposite the inlet eye), reduce pressure at the seal area, reduce axial thrust, and discourage recirculation. Some impellers have similar vanes on the eye side as well as the shaft side – in this case, those on the shaft side are usually called â€Å"expeller vanes†. In clear water pumps, a cylindrical ring is usually cast or machined into the outside surface of the shrouds, coinciding with a matching feature in the casing, to help seal off the discharge fluid from the suction fluid and prevent internal circulation. Clearances here are tight in order to ensure pumping efficiency – typically around 0.25mm on radius for most common sizes of industrial pumps. In larger pumps the casing (and sometimes also the impeller) is usually protected at this point by replaceable â€Å"wear rings†, which may be high-wear items, and need to be replaced before efficiencies fall too low. It is good practice to replace wear rings once the clearance reaches twice the original specification. Wear rings are provided in a wide range of designs and materials according to the pressures, speeds and fluids involved. The wear rings on impeller and casing are often made from differing materials that are not subject to galling, to reduce problems should contact occur. Wear ring features may include labyrinths, water injection, inspection ports, adjustment mechanisms etc. Pumps handling light slurries may make use of wear rings, sometimes with water injection to reduce wear from the slurry. Pumps handling heavier slurries usually just use pump-out vanes. Slurry pump impellers must be designed to resist wear and tear, and this requires some pumping efficiency features to be sacrificed. For example, vane edges will be blunter, vanes and shrouds will be generally thicker, and the number of vanes will be decreased in order to open up the channels between them. Passages through slurry pumps, including impeller vane spacing, are larger than for clear water pumps. Open impellers are sometimes used for very stringy materials, but tend to be weak and wear quickly, and so are not very common. Vane shape is obviously a major element of impeller design. Two critical factors are the blade entry angle (ß1) and blade exit angle (ß2), as measured between the centre-line of the vane and a tangent to the inner or outer diameter (respectively) drawn from their tips, in the oppo site direction to rotation. Most modern pumps have impellers with ß2 smaller than ninety degrees – ie backward-curved blades. Theoretically, a forward-curved blade would give higher head, but at less efficiency. Some pumps have ß2 at ninety degrees, and these are sometimes referred to as â€Å"expellers†. Many clear-water impeller designs rely on close running clearances between vane tips and casing to minimise recirculation from one â€Å"vane chamber† to the next, and maximise efficiency. Even small amounts of vane tip wear can have an effect on head and overall efficiency. The outer and inner vane tips should be sharp, not rounded or chamfered. Replacing a pump which is too large for its duty can be a major exercise. It usually requires changes to the foundations, drive arrangement and piping, spares holdings, and so on. A model of the ideal size may be just not available. As an alternative, in some cases it may viable to install a reduced-diameter impeller without changing other components. If done correctly, trimming the impeller will move the pump’s BEP to match the actual system operating point. The efficiency at the new BEP will be lower than the BEP with the original impeller, but higher than was being achieved in practice when operating well away from the original BEP. The performance variation can be estimated using the â€Å"affinity laws† which often apply to a specific impeller before and after machining: Flow rate: Pump head: Motor power: Q1 / Q2 = n1 D1 / n2 D2 H1 / H2 = (n1 D1 / n2 D2) P1 / P2 = (n1 D1 / n2 D2) 2 So if running at the same speed, trimming an impeller by a certain proportion will result in a corresponding drop in flow rate, a greater decrease in head produced, and an even greater decrease in the motor power consumed. However, these equations are based on several assumptions and some caution is called for. Impellers are complex three-dimensional objects and their effects on the liquid are due to other factors that are also affected by machining, beyond just the outside diameter – eg open area, discharge blade angle and so on. The following considerations should apply. ï‚ · Diameter reductions should not exceed 10%. Reductions beyond 20% are generally considered extreme. Some references state 30% as the maximum reduction advisable. ï‚ · Some overlap in the vanes should be retained. ï‚ · The angle between the vane centreline and the tangent to the outer diameter drawn at its tip should be restored to original by filing, with most filing occurring on the trailing si de of the vane.   The vanes will probably be thicker after cutting, and should be filed back to original shape, by filing on the traling side of the vane. ï‚ · Vane tips should be kept sharp, not rounded or chamfered. Outer tips should be sharpened by filing on the trailing side, and inner tips by filing mostly on the leading side.   Inefficiencies will take the form of increased disc friction, increased flow path length within the casing, and more recirculation across vane tips. Impellers apply forces to the fluid and are subject to the equal and opposite forces themselves. The typical single-suction impeller engages with fluid entering the pump and at first accelerates it axially into the pump, before diverting it into the radial direction. The impeller pushes the fluid into the pump, and at the same time pushes itself axially back toward the inlet point. Another way of looking at this effect is to consider that the impeller is mostly exposed to pressurised fluid all over the shroud surfaces, but not at the eye on the suction side. The thrust on the impeller must be resisted by the shaft arrangement, which must always include bearings capable of serious thrust loading. Double-suction pumps typically have less axial loading, but can still experience axial thrust, especially if flow is restricted more on one side due to internal differences in the pump, or restrictions in fluid supply on one side. Clean water pump designs may incorporate features to reduce this imbalance, such as having wear rings on both sides of the impeller, with the pressure within t he volume they enclose largely equalised by â€Å"balancing holes† passing right through the impeller. Another method is the use of a balancing disc. This is a disc mounted on the shaft in a separate chamber, with a geometry and clearances designed to counterbalance thrust effects. However, these are not practical for slurry pumps, which may use pump-out vanes instead, to lower the pressure toward the inner area of the non-suction shroud. Axial thrust loads usually consist of a steady state component plus dynamic fluctuations. Heavy axial loading is often associated with recirculation. Where failure occurs it is usually a result of overloading and over-heating of bearing components. Measures to correct excessive axial loading include:   Restoring BEP operating conditions (which may include selecting a more appropriate pump size or trimming the impeller)   Ensuring internal clearances / wear are not excessive ï‚ · Verifying correct bearing type and installation including clearances / pre-load To further complicate this issue of axial thrust, single-suction pumps handling fluids with a high suction head may experience thrust on the impeller in the opposite direction, away from the inlet. And then there are pumps with highly variable duties and suction conditions that may experience impeller thrust in different directions at different times. Shaft The shaft transmits mechanical power to the impeller from the driving motor or engine. It must also support the impeller and restrict its axial and radial movement. The loads on the shaft include self-weight of the rotating components, torque, and forces transmitted to / from the fluid. Design of a shaft requires consideration of maximum allowable deflection, the span or overhang, the location and direction of all loads, any temperature variations, and the critical speed. Loads are normally at their maximum on start-up. All objects have a natural frequency at which they will vibrate after being struck. Machines made of several components with complex shapes normally have several natural frequencies, some of which dominate. In the case of pumps, if the rotational speed of the impeller matches a dominant natural frequency, small imbalances may be amplified to a level where they interfere with operation and/or reliability. These are known as â€Å"critical speeds†. Steady operating speeds between 75% and 120% of the first critical speed should be avoided. Pumps with longer overhang on the shafts have lower critical speeds. Shafts are referred to as rigid or flexible, according to whether the running speed is lower or higher than the first critical speed. Pumps with a flexible shaft must pass through a critical speed on each start-up. This is not usually a problem because frictional forces with the fluid and the bearings act as dampers for a period sufficient for transition through the critical speed. Pumps with speeds below 1750rpm, which includes most slurry pumps, are usually of the rigid-shaft design. The shaft must be designed so that any deflection will not bring moving parts into contact, for example at wearing rings, or cause non-concentricity in critical areas such as the shaft seal. As a general rule, shaft deflection should not exceed 0.15mm even under the most extreme conditions. Deflection and critical speed are related stiffening a shaft to reduce deflection will also raise its critical speed. For pumps with overhung impellers, as is the case for most slurry pumps, this often results in the shaft diameter between bearings being quite large. The fluid passing through a pump creates a hydrodynamic bearing effect, known as the â€Å"Lomakin Effect†. That is, to some extent, the impeller rotating in the casing with fluid present is like a shaft rotating in a journal bearing with oil present. The result is that the shaft is better supported when running than when idle, so that the shaft deflection will be less, and the critical speed of the shaft assembly will be higher. However, the Lomakin Effect varies with pump head and internal clearances, both of which diminish with wear. Therefore the effective critical speed may be expected to decrease with time in service. To allow assembly, shafts step up in diameter from coupling to bearing to impeller, so tha t any torque problems are very likely to appear first at the coupling rather than the impeller, at least in single stage pumps. Shaft Seal and Sleeve The shaft connects the drive to the impeller, and so must pass through the pressurised casing. Achieving a reliable seal between shaft and casing is one of the most problematic areas in pumping. Centrifugal pumps have two types of seals – mechanical seals and packing seals. Many designs of mechanical seals have been attempted for slurry pumps, without comprehensive success, and the remainder of this discussion concentrates mainly on packing seals and stuffing boxes. Note, however, that packing is only suitable within pressure and temperature limitations. Depending on pump design and duty, the seal may need to prevent either air ingress into the casing, or fluid egress out of the casing or both of these at different times, if operation is variable. Many casings are designed with the seal area built into a compartment configured to improve sealing performance. For mechanical seals, this compartment is usually referred to as the â€Å"seal chamber†, while for packing seal s, it is known as the â€Å"stuffing box†. Slurry pump seals usually consist of several rings of packing fitted in a stuffing box around the shaft, often with provision for grease lubrication or water injection to reduce friction and provide additional sealing (particularly for when the pump is stopped). There are many stuffing box design variations and many types and configurations of packing. Stuffing boxes will accept a number of rings of packing, with a packing ring or throat bush preventing extrusion into the casing, and a gland (sometimes called a â€Å"follower†) used to adjust packing compression. A lantern ring may be substituted for one of the packing rings, to cater for injection of grease or sealing water, water being particularly required if air would otherwise be sucked into the fluid stream at this point. Sealing water (or an alternative clean liquid) is usually required for: Slurries   Liquids for which leakage is not acceptable   Liquids that are not suitable for sealing purposes   Suction lifts greater than 4.5m (air ingress may interfere with priming)   Discharge pressures above 70kPa The packing must be placed under some compression and this tends to result in wear on the shaft, which is often sleeved to avoid having to replace the entire shaft once wear is advanced. There are numerous designs of shaft sleeves. The shaft sleeve must be resistant to friction and heat, and several different materials and surface treatments are available – eg hardened high-chrome stainless steel, ceramic, plasma spray or tungsten carbide coating etc. To prevent chipping, coatings should not extend to the edges of the sleeve. The sleeve does not contribute to strength, so the shaft itself must be large enough to carry all the loads, and this means that including a sleeve in the design enlarges the seal diameter. For small pumps, this may decrease pumping efficiency and raise the purchase cost to the point that sleeves may be abandoned and a stainless steel shaft used instead. Glands may be solid, or split to allow replacement without disassembly of pump or bearing assembly. They are usually made of bronze, cast iron or steel. Special designs are used to improve safety if the fluid is hazardous. The leakage of fluid past the packing is controlled by tightening the gland, compressing the packing axially and expands it radially so that leakage paths along the shaft sleeve are constrained. However, some fluid flow between packing and sleeve is usually needed to avoid overheating the packing and damaging the sleeve surface. Once the sleeve surface is damaged, the sealing efficiency decreases and more tightening is required, further damaging the sleeve, and so on. The secret is to provide a configuration of packing and seal water injection that suits the application, and then avoid over-adjustment. To further reduce the pressure at the shaft seal area, where the rear pump-out vanes are not sufficient, some slurry pumps are fitted with a second smaller open-faced impeller, usually called an â€Å"expeller†. Many different designs have been tried. If sealing water is used, there will be a design intention regarding the ratio of water to pass in to the volute compared to out past the gland follower. This can be controlled using the number of packing rings on each side of the lantern ring, but the lantern ring must be installed at the injection point. For clean water pumps, this seal water is sometimes provided from the pump discharge. Clean water must be used to avoid contaminating the packing with grit – filtration or cycloning may be necessary if the water contains some grit. When managing sealing arrangements, thought must be given to what happens when the pump is stopped. The pressure in the stuffing box changes to static conditions, which may result in slurry leaking into the packing and contaminating it, causing rapid sleeve wear on re-starting. But if sealing water continues to be applied, the slurry may be diluted, and eventually a sump can be filled with sealing water if left idle for a long time. For prolonged stoppages, sumps may be best dropped, for various reasons. On restarting, sealing water supply should start before the pump starts. Stuffing boxes in extreme applications may be provided with galleries through which cooling water can pass to prevent excessive temperatures around the packing. In applications where leakage must be more precisely controlled, or where elevated temperatures in the seal area must be avoided (for example where the fluid is volatile), mechanical seals may be suitable, provided that the fluid is not damaging to the seal components. A comparison between mechanical seals and packing seals is given below. ï‚ · Packing seals: o Low initial cost o Tend to deteriorate gradually o Easily replaced when necessary o Can handle large axial shaft movements o Always some leakage required o Require regular adjustment o Not suitable for hazardous / volatile fluids o Often cause progressive shaft sleeve wear o Can result in significant shaft power losses o Limited to low pressures and speeds ï‚ · Mechanical seals: o Minimal or zero leakage o No adjustments required o Suitable for hazardous / volat ile fluids o No shaft wear o Do not consume significant shaft power o Can handle high pressures and speeds o Tend to fail suddenly o Replacement requires pump disassembly o High initial cost Packing seals work as a result of axial compression, so that the packing rings extrude outward and apply radial pressure to the adjacent components, these being the static surface of the stuffing box, and the rotating shaft sleeve. A dynamic seal is formed between the packing rings and the sleeve surface, with some fluid flow between the two being necessary for lubrication and cooling. For clean water pumps, this fluid may be supplied from the inner end of the stuffing box, or from the discharge pipe via small diameter piping. In the case of slurries, grit in the fluid would add to friction and wear, so the lubricating and cooling fluid is usually injected from a separate clean water supply. The injection pressure should be 10 to 25psi greater than that at the inside end of the stuffing box, and this figure should be available from the pump designer. A rule of thumb is to set the gland feed water pressure to between 35 and 70kPa above pump discharge pressure. Pressure regulation is often helpful. In theory, some slurry pumps should operate with a pressure at the inside of the stuffing box which is below atmospheric pressure, so that the packing is required only to prevent air ingress into the pump. However, when the pump is turned off, or in abnormal operating conditions, slurry can pass back into the seal and contaminate the packing with grit, so these situations still call for water injection. Grease or oil may be used instead of water in some applications. Packing material must be able to withstand the operating environment and remain resilient to perform satisfactorily despite minor shaft misalignment, run-out, wear and thermal expansion / contraction. Packing is available in a huge range of materials (lubricant, binder and fibre / matrix) and in many sizes, shapes, and constructions, to suit different applications – particularly size, shaft speed, temperature, pressure, and chemical resistance. The number of packing rings varies between applications, the most common arrangement being throat bush or ring, three inner packing rings, lantern ring, two more packing rings, and gland follower. The lantern ring may be placed further in, to reduce slurry ingress. Packing size is usually proportional to shaft / sleeve outer diameter, as follows: Shaft / Sleeve OD (mm) 15 to 30 30 to 50 50 to 75 75 to 120 120 to 305 Packing Size (mm) 6 8 10 12.5 16 Shaft sleeve finish needs to be at least 0.4micron CLA to avoid excessive rotational friction, and the finish in the stuffing box bore needs to be at least 1.65 micron CLA to allow even compression during adjustment. The sleeve must be harder than the packing, and chemically resistant to the fluid pumped and the injection fluid. Any coating on the sleeve must have a good thermal shock resistance. The lantern ring allows for entry and distribution of the lubricant or flushing fluid. Lantern rings are usually split to allow installation and removal without pump disassembly. They were traditionally made from metal such as stainless steel, but lubricant-impregnated plastics are now common. Gland followers are also usually split to allow easy replacement. They are usually bronze but may be steel or cast iron. Special purpose gland followers are used with volatile or hazardous materials, including capacity for diluting and safely flushing away leakage. The axial compression on the packing must be occasionally adjusted to control leakage. The correct leakage rate is one drip per second. Over-tightening should be avoided as it will result in over-heating and shaft wear. Most packing is supplied with impregnated lubricant, and over-tightening will press the lubricant out. Pumps need extra sealing provisions if pressure at the inner end of the stuffing box is greater than 75psi. The use of harder packing material on the inner rings may help. The procedure for replacing packing is: 1. Read the instructions provided by the pump manufacturer and packing supplier. 2. Loosen and remove gland follower. Inspect gland follower for wear, corrosion, warping etc. 3. Remove old packing rings using a packing puller, and the lantern ring. 4. Inspect shaft sleeve surface for deterioration, and clean up where possible. Replace if necessary. 5. Inspect bore of stuffing box for corrosion, wear, scaling etc, and clean up where possible. 6. Verify correct packing size to be used. 7. Tightly wrap the correct number of packing coils around a mandrel of equal diameter to the shaft sleeve. 8. Cut each ring at an oblique angle. 9. Install each ring, staggering the joins 90 degrees on subsequent rings. Suction / Intake Design Centrifugal pumps operate most efficiently when the liquid to be pumped flows into the inlet nozzle in a smooth, uniform manner with minimal turbulence. Suction systems need to be designed to ensure that this happens. The most common problems are: ï‚ · Uneven / turbulent flow ï‚ · Vapour collection ï‚ · Vortex formation Suction piping should be as short and straight as possible to minimise friction, and if unavoidably long, should be of large diameter. The suction line will normally be at least one pipe size larger than the pump inlet flange, requiring fitment of a reducer. A reducer should not change the pipe bore by more than 100mm. Fluid flow should be as uniform as possible right up to the pump inlet flange. There should not be any fittings likely to cause turbulence, sudden changes in flow direction or spin within ten pipe diameters of the pump inlet flange. There should be no short radius elbows at all, and no long radius elbows within three pipe diameters. All suction line connections need thorough sealing to prevent air being drawn in. For suction manifolds serving multiple pumps, all the above points apply, and branches should be angled at 30 or 45 degrees, rather than ninety degrees, and sized so that fluid flow is constant throughout. Flow should not exceed 0.9m/s. Improper suction conditions or designs can result in the fluid swirling as it approaches the pump through the suction pipe. This is called â€Å"pre-rotation†. It causes a drop in pumping efficiency because the pump is designed to process fluid that is entering without rotation, and can cause additional suction pipe wear. Sometimes a radial fin is fitted to the suction pipe or casing to reduce pre-rotation. The suction pipe design should cater for elimination of air from the suction line, and prevention of vapour pockets, in the simplest manner, meaning that: ï‚ · For pumps with the feed being drawn from a level below (eg a dam pump), o Suction pipe should have a slightly upward slope toward the pump o The eccentric reducer should have the flat side on top ï‚ · For pumps with the feed being drawn from a level above (eg a thickener underflow pump), o Suction pipe should have a slightly downward slope toward the pump Vortexing in feed tanks needs to be avoided to prevent air being drawn down into the pump. Baffles may need to be fitted to tank walls. The tank fluid level needs to be kept well above the suction inlet. Bearings Bearings provide axial and lateral restraint to the pump shaft and attached components, while allowing free rotation. Axial loading on pump shafts may be significant as discussed separately, and the bearing arrangement always includes some thrust capability. The bearings most commonly used are deep-groove single row ball bearings, and single or double row angular contact ball bearings. Pumps may be in overhung configuration, where the shaft is supported by bearings on one side only, or have a shaft that passes right throught the casing with bearings on both sides. Most slurry pumps are of the overhung design. The bearings are usually rolling-element, but plain journal bearings are sometimes used on larger pump sizes. The bearings must be lubricated by grease injection or oil bath and may need provisions for cooling as well. This may be by having a cooling water jacket integral with the bearing housing, or by pumping the lubricating oil through a heat exchanger and filter. Oil lubrication is usually recommended rather than grease, if speed exceeds 5000rpm (which is very rare in a slurry pump). Grease-packed bearings should have one third of the chamber filled with grease. Oil baths should be filled to the centre point of the lowest rolling element. Inadequate loading of bearings can result in the rolling elements skating over the race instead of rolling, and this can cause heating and failure. To avoid this, bearing assemblies are usually designed with an assembly configuration, including preload, that ensures all bearings carry some load. Frame and Foundations For large pumps that are directly connected (ie no vee-belt drive), the motor and pump are usually mounted on the same bed-plate, which is fixed to the foundations in a way sufficient for eliminating looseness and distortion. This eliminates some misalignment issues at the source. Foundations including bed-plates should be checked occasionally for deterioration (corrosion, ground subsidence, concrete cracking, loose fasteners, missing grout etc), and the alignment between pump and motor should also be checked if there is any cause for concern. The framework should have provisions for drainage of any spillage and seal leakage etc, so that this does not become trapped and contribute to corrosion etc. Where pumps operate at high temperature (ie above around 100C) the pump casing should be supported at its axial centre-line, to help reduce thermal stresses. It is generally preferred that all suction and discharge piping have its own supports, so that the pump casing and foundations do not carry any significant static or dynamic piping loads, and so that pump components can be independently removed and replaced. Where this is not the case, extra pump and foundation attention may be needed at the design stage. Drive Arrangement Many drive arrangements are possible to suit the circumstances. Electric motor drive is the most popular, followed by internal combustion engines. Variable speed drives are sometimes necessary and often convenient, but always more expensive and less reliable. In minerals handling plants, slurry pumps are most often electric motor driven, with belt drives. Belt drives allow speeds to be changed through minor modifications – ie pulley changes. Short, low head slurry system designs usually provide motors that are 10 to 20% oversized, to cater for any under-estimates in slurry or system characteristics such as viscosity and friction, and to allow for minor system modifications during the service life. Instrumentation Pumps may be controlled to allow: ï‚ · Variation of flow rate, pressure, liquid level ï‚ · Protection against damaging operating conditions ï‚ · Flexibility in matching pumping performance to duty For centrifugal pumps, control is usually accomplished by speed setting (including turning off/on), or valve setting. This may be manual or automatic. For slurries, control by throttling valve is rare due to the wear rates that usually result. Typical instrumentation includes: ï‚ · Tank / sump level switches ï‚ · Pressure sensors ï‚ · Flow sensors ï‚ · Density sensors In each case, protection from damage by the slurry is critical. This is commonly achieved by using sensors that do not need to contact the slurry eg nucleonic density sensors mounted outside the pipe, with source on one side and detector on the other. Ideally, it is good to have instrumentation available, either permanently mounted or portable, to: Verify operation at BEP, by measuring the difference between suction and discharge pressure Determine flow Ensure that NPSH is sufficient to prevent cavitation Compare flow to motor amperage, to identify when impeller adjustment is needed Need to search more on valves for slurry applications. Notes on Material Selection Where there is some chance of parts coming into contact during pump operation, thought should be given towards minimising the damage that may result. An example of this is at the wear-ring / impeller interface. Studies have shown that damage can be minimised by manufacturing adjacent components from materials that:   Are dissimilar, except where known to be resistant to adhesive wear and galling   Have a difference in hardness of at least 10Rc, if either has hardness less than 45Rc Because it may be difficult to always prevent cavitation from occurring, impellers are usually made of cavitationresistant materials such as chrome-manganese austenitic stainless steel, carburised 12% chrome stainless steel, cast nickel-aluminium bronze, etc. Obviously corrosion resistance is another key selection factor that these materials satisfy. Slurry pumps are subject to heavy wear in the form of abrasion and erosion. The aggressiveness of the slurry is determined by the hardness of the particle s in the slurry, their shape (rounded or sharp), the pulp density, and the size distribution. Slurries can become less aggressive as they travel through a minerals processing plant as the sharp edges become rounded off. Velocity and angle of impingment are also very important factors affecting the resultant wear rates, with wear rate being proportional to velocity squared according to some references. The impingement angle associated with maximum wear rate seems to be dependent on the hardness and brittleness of the material being struck. For very hard / brittle materials it is between 65 and 90 degrees, while for more ductile materials it may be around 25 degrees. Pumps handling slurries with greater than 6mm particle size are usually lined with rubber. However, if impeller tip speed exceeds 28m/s, rubber becomes subject to thermal degradation, and this usually restricts the use of rubber to a maximum head of 30m per stage. Metal lined pumps may be used up to 55m head per stage. For wet end components, materials that may be used to resist wear include Ni-resist, carburised and hardened 12% chromium steel, etc. White iron slurry pump components, which includes Ni-Hard, are restricted to impeller tip speeds of about 36m/s to avoid maximum disc stresses. Steel components are softer but can run at higher speeds, up to a tip speed of 45m/s. Centrifugal pumps are subject to cyclic loads due to such things as imbalance, unbalanced radial forces, fluctuating axial thrust, the vibration induced as each vane passes the cut-point, and variations in upstream and downstream fluid pressure and flow. This sets the scene for fatigue loading, which becomes more of an issue if the slurry is corrosive. Fretting may occur between assembled components where looseness is allowed to develop. This is best avoided through the use of correct manufacturing dimensions and surface finishes, good fitting practice etc. The materials commonly used for pump components include:   Impellers (require castability, weldability, and resistance to corrosion, abrasion, and cavitation) o Bronze, for non-corrosive liquids below 120C o Nickel-aluminium bronze, for higher speed and mildly corrosive applications o Cast iron, for small low-cost applications o Martensitic stainless steel, where added resistance to cavitation, wear, corrosion (other than salt water) or high temperatures may be required o Austenitic stainless steel (mostly cast 316 grade), where a higher level of corrosion resistance is needed. Austenitic stainless steel with 6% molybdenum is often used for salt water pumping.   Casings (require strength, castability and machinability, weldability, and resistance to corrosion and wear) o Cast iron o Cast steel, where extra strength is required ie for pressures above 6000kPa (1000psi) and temperatures above 175C. o Austenitic cast irons with 15 to 20% nickel (Ni-Resist) may be used where abrasion and corrosion are issues. o Bronze, for water applications o Stainless steel, where corrosion is a major issue – martensitic for higher pressures in mildly corrosive fluids, austenitic for more aggressively corrosive fluids. ï‚ · Shafts (require resistance to fatigue and corrosion) o Mild steel, where corrosion and fatigue are minor issues Low alloy steel such as 4140 for added strength Martensitic stainless steel, where added strength and corrosion resistance are needed Shafts are usually chrome-plated, and care is needed to avoid this adding to the fatigue susceptibility through micro–cracking and hydrogen embrittlement. Shafts can be shot-peened prior to plating, and heat-treated afterward to reduce these effects. Wear rings (require castability and machinability, and resistance to corrosion, abrasion and galling) o Bronze for clean liquids and temperatures up to 120C o Stainless steel for applications with abrasion, corrosion and high temperatures – but steps must be taken to avoid galling should the rings come into contact eg increased clearances, hardness differences etc. o o o Impellers other than those made from martensitic stainless steel can usually be repaired by welding, although in some cases this needs to be followed by specific heat treatment processes. In all cases, more exotic (and expensive) materials may be used for specific applications. Material selection is often a balancing act between optimising purchase cost and maintenance / operations performance. Where high temperatures are involved, material selection must take into account differences in expansion rates. Unlined slurry pump impellers and casings are often made from abrasion-resistant cast irons as per ASTM A532, which includes Ni-Hard. These materials consist of a martensitic matrix with secondary hard phases of chrome and iron carbides that increase wear resistance. They cannot be machined or welded, and tend to be prone to corrosion, and breakage through mechanical impact and thermal shock. Brittleness may be reduced by annealing, but this reduces wear resistance. Slurry pump impellers and casings may be lined with softer materials like rubber, where high temperatures can be avoided. These can reduce wear rates by absorbing the impact energy of the particles, while resisting corrosion. Problems may arise in bonding of the rubber at the cut water point, and on the impeller. The lining reduces the thickness of the metal section of the component, so stronger materials are usually used eg steel rather than cast iron. Manufacturers develop their own specifications for ideal liner thicknesses based on experience, but one reference suggests a volute liner thickness of 4% to 6% of impeller diameter. Natural rubbers seem well suited for wear liners for use with slurries with less than 6mm particle size for the impeller, and 15mm particle size for the volute. Provided the base materials are suitable, patches of high wear on wet end parts can sometimes be repaired by welding / hard-facing. However, this increases the likelihood of cracking. Also if the welding results in uneven surfaces in critical points, the added turbulence can accelerate further wear. Many types and styles of surface coating have been tried, with some success. These include thermal spray coatings, diffusion surface treatments, spraying and trowelling of epoxies, etc.