HR Planning Case Study Essay

Xerox is a widely known firm worldwide, but it has been through numerous crises in the past decade. In fact, at one point several years ago, there were questions about Xerox surviving as a firm. But no longer. Under the leadership of Anne Mulcahy as CEO, Xerox has rebounded. Numerous strategic business and financial decisions had to be made, including reducing the workforce by 30,000. But Mulcahy also stressed that HR had to become a more strategic contributor. One of the actions taken was to consolidate a number of HR functions from different busi-ness units into a corporate HR Service Center. This center performs many administrative trans-actions, and has added Internet- based systems to make HR services more accessible to managers and employees. To track employees’ views on the company and HR, employee surveys on the company in-tranet have been used for several years. Areas at which lower scores were recorded have been addressed by HR staff and other managers. The survey results have led to another primary focus at Xerox: employee retention. With all of the reductions and organizational restructurings, keeping the remaining employees, especially high- potential ones, has been a continuing emphasis. Xerox has invested significant time and resources into training and development of its employees, an important retention factor. Greater use of e- learning, technology, and leadership development have paid off in reducing turnover and convincing employees that career opportunities exist at Xerox. Continuing com-petitive pressures are presenting new challenges for Xerox and its HR staff. The strategic importance of HR has been demonstrated in the past, and looks to be a part of the firm’s future.

Major Inventions of the Late 19th Century and Early 20th Century

They have been many major inventions within the late 19th and early 20th century. Throughout history, these inventions have made great impacts on society. Three of these inventions that made the greatest impact are the telephone, the telegraph, and the light bulb. Each of these inventions has made a different impact in some way but they are still some of the greatest inventions.The telephone has left a huge impact on the world. The telephone is a device that can electronically transmit speech. Telephones are still today. People ranted about the helpful characteristics of the telephone.The telephone made communication easier and faster for people. It led to additional advances in networked communications. It also led to more job offerings, changes marketing and politics, and allowed more public feedback. At the same time privacy was a concern, but the telephone also increased privacy in many ways.It helped so people did not have to write letters to exchange information, yet people cou ld eavesdrop on phone calls since they would have to go to a local store to make a phone call. The telephone usage has increased at high percentages since it was created.The telephone has made the world smaller and more accessible to everyone. The telegraph was another invention that left a great impact on society. The telegraph worked by transmitting electrical signals of dots and dashes over a wire laid between stations.Within only nine years of the telegraph’s first message, only one state was not connected by telegraph. The telegraph reducing the amount of time it took to transfer information over large distances from weeks down to hours or minutes. The telegraph led to the inventions of the telephone, fax machines, and the Internet.The telegraph laid the basis for the communications revolution that led to those later inventions. The light bulb had its on major impact on society. The light bulb is the first electrical light used. The light bulb has made working for longer hours possible. It has also removed fire hazards like oil lamps and candles.Light bulbs help you work at all possible hours instead of being interrupted when the sun goes down. The light bulb impacts society with other inventions that use light bulbs as a main resource such as the flashlight, the microwave oven, head lamps, and light houses.They also allowed people to move around at night without any dangers. When cars were invented, light bulbs were used for head lights and traffic lights. Light bulbs became a major resource of light for many people since they was invented. There are many inventions that impacted society within the late 19th century and the early 20th century.Light bulb, telephone, and the telegraph are the three major inventions that had the greatest impact on society. They have all made different types of impacts in several different ways but they are still considered to be some of the greatest inventions in history.

Treating Animals with the Same Respect as Humans

Treating animals with the same respect as humans In 2012 there were 35 000 animal cruelty cases reported in the media all over the world. What is more, there are many atrocious videos posted on the internet in which animals are being ill-treated or killed. Statistically, one fifth of all domestic animals are not well treated. These facts arouse the question: ‘Should animals be treated with the same respect as humans? ’. In spite of the fact that animals are not conscious thinking creatures, they should be treated as humans because they are biologically similar to us and they are our companions.First and foremost, animals are biologically similar to humans. Their genetic code is similar to ours because it is made of the same nucleotides that encode amino acids. DNA is the carrier of genetic information in which our behaviour, appearance and genetic predispositions are encoded. Human and animals’ structure of DNA is almost the same. The best example is the DNA of th e great apes which is in 95 percent similar to the human. Even though many people can say that animals do not feel anything, animals are able to feel pain, happiness or anger owing to the developed nervous system.The typical examples of that are a dog which howls when it feels pain and a cat which purrs when it is being stroked. Many experiments were held in which e. g. chimpanzees were learnt how to count fruits shown on the screen and with the right answer they were getting a reward, and they were able to learn it which is the clear proof that they are able to learn certain conducts in the course of time. Furthermore, many species of animals are human companions. Choicely trained dogs are used to help blind people function in the world. Jack is one of the many people who without his dog would only have to stay at home and be dependent on his family.However, it is not the life that those people want to live and dogs are the unbeatable mean of helping them in their day-to-day activi ties. Secondly, enormously keen sense of smell that sniffer dogs have is most useful in rescuing people who have been trapped under the rubble because they can smell the scent of human in the places where the sight of rescue team is limited. Cats or hamsters are bred because of the very simple reason – they are ideal for children. Most of them are tame and they like being stroked. On the other hand, opponents say that animals should not be treated as humans because they are not conscious thinking creatures.The only way of communication between them is using primitive codes, not developed language e. g. bees are dancing in order to communicate something to others or elephants are making sounds that are not audible for humans. What is more, these codes are only used by them in order to survive their assemblage. All in all, no matter what opponents may say, animals should be treated with the same respect as humans. They are biologically similar to humans at the DNA level and the y are perfect human companions used in order to help people and beguile their free time. They should not be treated as if they did not feel anything.

Films as Essential Tools of National Historical Analysis Research Paper

Films as Essential Tools of National Historical Analysis - Research Paper Example Cinematic and narrative elements of movies together with other stylistic devices help to bring out the intended meaning or outcome. Modern filmmakers have creatively used various aspects that show events that depict historical growth of particular nations. These films show the reasons why certain historical aspects have faded away or have remained and why they hold particular importance to those nations. Au Revoir les Enfantes also known as Goodbye Children is about a French boarding school that is under the administration of priests (Everett 49). The school seems to be a place of protection where people enjoyed peace and harmony until a new student gets into the school. The new student was allocated a room, which he could share with a student who was top in his class. Despite the fact that they became rivals at their first contact, they later form an inseparable bond linked by a shared secret. They became friends one night when they got lost in the woods and are rescued by German so ldiers. The soldiers wrapped them in blankets and drove them back to school. The film was written and directed by Louis Malle. It was produced in the year 1987 (Everett 49). The movie is based on an event that happened in January 1944. Louis Malle was twelve years old when the incident happened. At that time, he was attending a Jesuit boarding school along Fountainebleau. After the Christmas holiday had ended, schools were back with normal classes and other operations. In the middle of the scholastic year, three new students joined the school one of whom became a rival and competitor with Mall. Malle used to top the class in scholastic domain. After several weeks in school, Germans arrested the young boy who competed with Malle together with the other newcomers. Julien did not know about the true identity of jean but tried as much as he could and learnt that Jean was a pseudonym. The headmaster of the school also disappeared at the same time. The three boys were of Jewish decent. Th e convent school in Au revoir les enfants, on the other hand, is an elite institution for wealthy children, and it attempts to insulate itself from events outside its walls.   This is also a familiar trope in Holocaust/Occupation films... the wealthy elite who go into denial and/or lie about what's going on around them in order to hang onto not just wealth and power, but also customs, tradition, and civility. As the film documents, films can be used to show important historical events that took place at a certain period in time. This film captures the events that took place during the Second World War and their impacts. It is a fiction film that was created from the memories from a journalist’s conscience (Aitken 207). It is a story about France during the Second World War. It is essential to note that the young boy, Jean Bonnet was different from the other students in the school. He had a curly hair and did not eat pork. However, the secret about his decent becomes an open secret when everyone knows that he is Jewish. The catholic priests who are the administrators of the school admitted the Jewish boys as an act of charity because the boys lived as pseudonyms because they did not know the whereabouts of their parents (Aitken 207). Malle’s films clearly show the use of the narrative trope of class, morality, and opportunity during crisis. For instance,  Lucien Lacombe is a working-class farm boy who is able to advance himself during the Vichy crisis,

The Story of Continental Airlines remarkable turnaround in 1994 is Essay

The Story of Continental Airlines remarkable turnaround in 1994 is well known in business policy and strategy classes worldwide - Essay Example Continental Airlines is presently America’s fifth largest airline that carries around 50 million passengers a year across the globe to more than 227 destinations. But a couple of decades back in 1993, it was facing its third and final bankruptcy when the new CEO Gordon Bethune and Consultant, Brenneman created history in the turnaround of Continental Airlines. Their leadership initiatives turned the loss of $613 million in 1994 to $224 million profit in 1995 (Brenneman, 1998). The discontented and highly demotivated workforce became the major enabling elements of success that contributed to its renewal. The turnaround strategy was critical factor that was conceptualized around four simple strategic principles that required strong belief, persistence and constant motivation. The creative approach highlighted leaders’ vision which was used to inspire the workforce for higher productive outcome. Turnaround strategy of Bethune and Brenneman was mainly focused on how the firm’s falling fortunes can be turned around into success. They did not place undue emphasis on cost cutting but rather made judicious plans for building strong team of high performance members who believed in collective actions and shared goals. The leadership of new management was exemplary in their forward looking outlook and expedited the process of recovery with single focus on defined goals and objectives. The strategies that were implemented are as follows: 1. Strategic action plans for recovery Bateman and Snell (2009:132) assert that strategic plans facilitate organizations to be innovative and develop linkages to meet the needs of the markets. Flexibility of approach and well laid out plans provide firms with clear direction for the future (Montgomery, 2008). In Continental case, action plan was made with feedback from the customers and employees, which was communicated across the workforce. The recovery plan was distinct in its simple targets but strict in its timeframe so that recovery could be fast. The necessity of fast action was communicated to workforce so that they could understand and become proactive in making it a success. It worked in Continental case because the high frustration in the workforce was mainly due to unclear and frequently changing strategies of the past. The lack of concise directions and target had led to disillusionment, adversely impacting their motiv ation for higher achievement. The new plans were clearly defined by the management and communicated on regular basis to the workforce that helped to strengthen their confidence and motivated them to work towards the goals with renewed enthusiasm. 2. Leadership initiative and team building Drucker (1999) believes that external and internal environment hugely contributes to business performance and managerial leadership innovatively exploits them for the organization’s advantage. The open communication approach used by Bethune and Brenneman helped in adapting to the strategic changes that were introduced to transform business dynamics. Leadership initiative is critical factor to develop an organizational culture of proactive participation, shared learning and strong teamwork (Shapiro, Slywotzky and Tedlow, 2000). The leaders looked for opportunities and exploited them with a sense of high urgency through a team of motivated

Practical Project Report Essay Example | Topics and Well Written Essays - 2000 words

Practical Project Report - Essay Example During my visit, I maintained my study to concentrate on the quality of services offered by the service providers of the restaurant. Glass Brasserie is a unique restaurant in its own way; it is incomparable to other restaurants. My initial observation upon reaching the restaurant was the cool, well-maintained and welcoming environment. Glass Brasserie is located in a human-friendly environment where no client would resist visiting often. This first impression at the entrance of the restaurant depicts an image of what to expect once in the restaurant. In the restaurant, all guest tables are perfectly arranged awaiting the arrival of new clients. The service providers are neatly dressed, and from their looks, one can easily know they have a passion for their profession. Quality in any organization determines the success or failure of the organization (Jane, 2001). Glass Brasserie’s management has enhanced quality delivery of services. The services providers are quick to respond to any new client who comes in the restaurant door. A warm welcome, hand washing and passing of menu to the clients is a welcome gesture. Such a warm welcome makes the client feel appreciated for his/her visit despite the fact that they will pay for the services. In this case, Glass Brasserie has succeeded in aspects of welcoming their clients and making them feel appreciated. Upon the client settling, the service providers take time to display their different type of foods and beverages to clients, expecting the clients to choose what they would like to consume. In the event the menu does not have a food or beverage the client wants to consume, the service providers ensure they find a means to provide the client’s expectations. This once again is a gesture to show appreciation of the clients in their restaurant. The physical aspects of the restaurant in my view are perfectly developed and deployed within the entity. Despite the physical factors of this restaurant, the means of delivery are professional and unique. Service providers in this restaurant deliver client’s order in a stylish and fashionable manner. Professionalism and style-decency in food and beverages is an essential factor to please clients. The manner in which you serve clients determines the reputation of the restaurant to the public. In Glass Brasserie restaurant, the service providers are very innovative and passionate in their tasks. Delivery of cutlery to the clients is on a dish; the cutleries wrapped perfectly in serviettes. This type of delivery shows the level of neatness observed within the restaurant. Upon delivering the cutlery on the table, the service providers carry along the client’s order in a tray. It is common for any restaurant to pack their deliveries on trays, however, the manner in which the service providers at Glass Brasserie deliver makes the difference; their passion for the job makes it look unique. Looking around the restaurant, you can tell tha t the clients are enjoying their stay at the restaurant. This is because they have exposure to quality services of their expectation and to some, beyond their expectations. Once finished taking meals a client has an option to be entertained or leave for the guest room to have some rest. The guest rooms neatly arranged: the level of catering professionalism is of high quality. Each guest is served with all essentials such as towels, bathing soaps, tooth

Bioprocessing requirements to manufacture a specific product Essay

Bioprocessing requirements to manufacture a specific product - Essay Example In lactic acid fermentation, a single molecule of pyruvate is changed into lactate. In the same process, ethanol and carbon dioxide are also resulting products. This kind of fermentation occurs in muscles of animals when the energy requirement exceeds the oxygen supply. This anaerobic process occurs, providing the organism with the energy required, in an anaerobic manner. Before this process can occur, though, a molecule of glucose has to be split into two molecules of pyruvate. This is a process referred to as glycolysis. In homolactic fermentation, two moles of lactic acid are anaerobically formed from a single molecule of glucose. When lactic acid is produced during fermentation, a racemic mixture of its two isomers is obtained. The L(+) and D(-) isomers will exist in equal quantities. When carbohydrate is fermented, glycolic and lactic acids will be found in the product mixture. This is the simplest form of fermentation. Lactic acid fermentation is a redox reaction that occurs in anaerobic conditions (Dworkin, 2006, 539). Lactic acid fermentation as a process finds use in the food industry since it is used in the production of yoghurt. Milk is fermented with bacteria that are harmless, mainly Streptococcus thermophilus and Lactobacillus bulgaricus. Milk is used as the culture in this process. When the pH of the milk is decreased, it congeals. The bacteria are responsible for producing compounds that give the resultant product the distinctive taste of yoghurt. By lowering the pH, the conditions become unfavourable for harmful bacteria, making this process effective. This process also finds use in producing sauerkraut. This process utilizes genus Leuconostoc (Dworkin, 2006, 541). In lactic acid fermentation, the product will be dependent on the strain of microbe used. The strain of microbe that is used for fermentation will influence the stereo-specificity of the product. The

Certified fitness trainer (Question5) Essay Example | Topics and Well Written Essays - 250 words

Certified fitness trainer (Question5) - Essay Example Secondly, you must also work out the core and abdominal muscles to strengthen them up. The media and magazines are pushing these myths because over a period of time people have become accustomed to taking it for absolute truth. They continue exercising in the same way and get the same result. Also so that people don’t fall prey to these myths and their efforts are not wasted or worse still detrimental to their health. Let us analyze the first fallacy - a result is no guarantee that it is beneficial to a person in the long run. For instance, if we perform countless sit-ups every day we will see a difference at the end of the period. So we assume that the exercise works since we can see a result, but do we really benefit from having stronger, tightened abdominal muscles? Or have we just got tightened muscles that will put Das 2 undue stress on our frame? Will it make any difference to our performance? Are we feeling stronger or are we just feeling tightness in an over-active mus cle? This is the second fallacy. Therefore, articles and advertisements on the internet and in magazines should depict different health and exercise myths and provide factually accurate fitness and health advice based on scientific reasoning to spread the awareness and to enhance performance. It should tell us the right way of exercising and its effect. Das 3 Works Cited Busy Woman’s Guide To Health & Fitness.

Stress Essay Example | Topics and Well Written Essays - 750 words - 1

Stress - Essay Example Stress can be explained as bodily reaction of certain agents. Stress is a response state and that its induction depends on the mediation of some appraising, perceiving, or interpreting mechanism. Also stress is defined as "a psychological and physiological response to events that upset our personal balance in some way. These events or demands are known as stressors" (Stress Management 2007). Certain universally adequate stimuli may be expected to lead to stress more rapidly than others, as, for example, cutting off the air supply. The main types of stress are physiological, psychological, and social. Also, it is possible to mention acute and episodic acute stress, chronic and traumatic types of stress (Stress Management 2007). This should lead to a stress state in all persons, with little variation in the rate of its development. However, any less severe stimulation, and particularly where the effectiveness of the stimulation is dependent on prior conditioning (as in the case of social stimuli), will give rise to response patterns that vary greatly from person to person and may induce anxiety or stress much more rapidly in one person than another. The main symptoms of stress are frustration, conflicts, pressure, emotional disorders, aggressiveness or passivity, memory problems and loss of objectivity, anxiety and depression, etc. The main causes of stress are health-related problems such as temperature and heart disease, high blood pressure and diabetes, tautological disorders and illnesses, headaches and inc reasing alcohol use, etc. In other words, there may be specific as well as general causes of distinct stress-related disease patterns. Systemic stress is concerned primarily with the disturbances of tissue systems, psychological stress with cognitive factors leading to the evaluation of threat, and social stress with the disruption of a social unit or system (Davis et al 72). While many believe the three types of stress are related, the nature of this relationship is far from clear. Critics admit that: 'the nature and severity of the stress disorder could depend on at least three factors: (1) the formal characteristics of the environmental demands, (2) the quality of the emotional response generated by the demands, and (3) the processes of coping mobilized by the stressful commerce. (Davis 127). The kind of situation which arouses a stress response in a particular individual must be related to significant events in that person's life (Stress Management 2007). Stress reduction techniques involve humor and self talk, crying and diet. The best techniques to cope with stress are rest and psychical exercises, effective anger management and analysis of the problems. In severe cases, psychologists use tranquilising drugs to treat stress and reduce its negative effects. Treatment may be viewed in these terms as assistance in the effort to reestablish the optimal level of integration which had to be sacrificed for a more tenable level of maintenance. Stress has a negative and harmful impact on human life and performance, and for this reason it is important for an individual to foresee and reduce the amount and impact of stress-related factors on our life. Works Cited Stress management. (n.d.). Davis, M.,

Strategic Planning Today for the Delivery of Quality Health Care Research Paper

Strategic Planning Today for the Delivery of Quality Health Care - Research Paper Example As the paper declares in the case of the service industry, it is hard for customers to know the quality of service they will get, and, therefore, depend on history of a business before choosing it as a source of service. Consequently, it is crucial for an institution to have a history of offering outstanding services to increase its customer base. In addition, in the health services industry, quality goes together with safety and customers seek services from highly acclaimed institutions, especially those with high recovery rates and low mortality rates. An institution must create a culture of quality service by one of the two main approaches, quality assurance, and quality control; the former is more suitable since it signifies a commitment to improvement and not just adherence to laid-down standards. If the health care system is not visionary enough to anticipate later changes and modify their approach on patient care, then technological advancement will result in use of equipment that increases productivity without having improvements in the quality and safety of service. In this research paper, strategic planning will be linked to improvements in service delivery. The paper will achieve this by reviewing the literature on research done to improve service delivery, and the consequences of doing so. Finally, the report will summarize the strategy, and make recommendations for improvement if available. Research Sources There have been many research attempts; all aimed at identifying reasons, consequences, factors, and methodologies of implementing research findings to improve the quality of medical care to patients. The findings of these studies, if implemented, stand a high chance of improving the quality of healthcare. However, this implementation depends on various factors incl uding the

Desmond Morris reaction Essay Example | Topics and Well Written Essays - 500 words

Desmond Morris reaction - Essay Example The territorial space was most interesting to me because I have noticed that people make a fairly wide combination of affiliations depending upon the circumstances. For instance, not everyone in my group of flats has the same political affiliations, but we are all neighbors and form a solid group whenever anything unfamiliar enters the neighborhood. At the same time that we identify ourselves as residents at this place, we also identify ourselves as students at the same school, workers at the same place, ‘workers’ or ‘students’, members of particular political parties and members of different and usually much smaller social groups and clubs. When our group of flats gets together for community events, we present a solid group to the outside, but inside, we are organized and divided according to some of these other affiliations. While I had always assumed this affiliation process was a natural process of sorting according to individual personality types, I had n’t considered how we established these associations so quickly within the group setting. Morris’ explanation into the various visual clues we provide in our daily interactions as he came down to the familial level began to make this clear. For example, I suddenly realized that no matter which door in the complex I come to, I can usually tell which resident lives there by the way they have customized their entrance area, which is otherwise identical to everyone else’s entrance area.

Why video games are Good Essay Example for Free

Why video games are Good Essay A kid plops down in front of the television and powers up his video game console. As he reaches for his controller, his mother has one point of view in her mind, more time wasted, another day wasted, video games rot my children’s brain. Or do they? Video games have a horrible stigma of â€Å"rotting our brain’s† because many believe that they are pumping our children’s minds with senseless violence and explicit content. Although many video games do include a substantial amount of violence, it comes second to the fact they can actually make you smarter according to many scientists and academics. They are seen to be good learning devices because of the problem solving and strategic thinking that is utilized to play video games. While there is obviously no substitute for classroom learning, video games can exercise the brain in many different ways. Most kids would rather pick up a joystick than pick up a textbook. Much to they’re unknowing they are exercising their brains. While traveling and discovering this exciting virtual world, they begin to figure out the rules and understand their goals in order beat the game and win. What might seem like a mindless zombie sitting on the couch for hours is actually someone solving a profuse amount of puzzles that are instilled in their video game. Someone playing a video game must solve and complete direct conflicts while keeping their overall goal in perspective. Playing a video game is similar to solving a science problem. Video gamers must come up with a hypothesis while trying to accomplish a goal, much like a student conducting a lab would do. For example: if a gamer is searching for a hidden item and they hypothesize that the item is in a dragon’s belly, they will attack the dragon and discover whether their hypothesis was correct or false. If they don’t find the item they must modify their hypothesis the next time they play. Video games are driven by goals and objectives, which are essential for learning. Scientific studies have shown that the brain can change with practice. If you train yourself to complete a certain objective, the part of you’re brain that you are using can actually growth in size and operation. Another scientific study has shown that those who constantly challenge their brain have almost a 50% less chance of developing dementia. Video games are all about interactive and active exploration, unlike leisurely reading a novel. A video game requires your brain to make immediate decisions. While reading a novel will exercise your creativity and imagination, video games will make your brain weigh circumstances and evidence, examine situations, reflect on your overall goal and forge a decision. It is not about what you’re thinking about when playing a video game, it is the way your thinking that challenges your brain. Video games make learning easier, comfortable, achievable and enjoyable. Any kid would rather learn how to slay a dragon than learn there times tables. This is simply because games offer more immediate and visible rewards. Memorizing and studying terms and theories may get you a good mark on your test, while beating the final boss will end the game. Gamers can also create their own adventure and decide their own unique fate and decided where they want to go and how they want to get there, within the restrictions of the game. It becomes their adventure. This is all played from the safety of their home, which prevents fears of making a mistake in front of others. If they lose, they can simply restart and try again without the feeling of embarrassment. This encourages gamers to take risks and expand their exploration opportunities. Although video games are no substitute for classroom learning, they have beneficial outcomes that can improve our brains activity making it healthier and function more efficiently. So next time you contemplate purchasing a video game, think about it not as endless hours waiting to be wasted, but rather as a large time investment for better of your mind.

Experiments of Copper (II) Sulphate

Experiments of Copper (II) Sulphate Aim This experiment is to calculate the x which is water of crystallization and the chemical equation is CuSO4 (aq) Â · xH2O (s) and to observed colour changed when complex formation of copper (II) sulphate are formed. Introduction Molar mass is summation of all the atomic masses in a chemical equation. Transition metals are the elements which are found in the d-block in The Periodic Table. The element which is in the first transition series is strong oxidizers and they can form bivalent metal ions which have reducibility and its charge is 2+. Because of empty of d-orbital, transition metals easily form coordination compounds. Copper can form coordination compound; however, its d10 structure is stable so that its highest charge is +3. Hydrochloric acid, its chemical formula is HCl. It is a strong acid and is easily vaporize so that after opening the container which contains HCl, the acid vapour will be seeing very clearly. Because HCl can volatilize, it will combine with the water and form HCl drops (Baidu.Baike, 2009). Copper (II) sulphate often exists as a crystallization as a pentahydrate which means a molecule contains five crystallization of water. It can be sale as blue vitriol which is a chemical material using to produce pigments, battery and so on (Chmicalland21, nd). Ammonia solution is a colourless liquid and has pungent smell. If it is exposing to air it loses NH3 quickly (Down.Food126, 2008). The displacement reaction is a simple substance reacts with a compound, and forms other kinds of simple substance and compound. The Crystal Theory is a theory that search for the chemical bond of the transition metals. The transition metals ions are located on the crystal field and surrounding by anions and dipole molecules. The anions are called central ions, and the dipole molecules are called ligands. These ions can affect the energy which belongs to d-orbital, because of a splitting of energy levels. However, this theory can used to explain the colour changes of the complex (Science.Jrank, 2010). Lister and Renshaw (2000, p469) has pointed out that the molecules or ions use lone pairs to form dative bonds with a d-block metal which is surrounding by a transition metal to form, its a complex. In addition, these kinds of molecules or ions are called ligands. Method Firstly, several apparatus were used in this experiment, for instance, crucible, spatulas, burner, tongs, electronic balance, stand, dessicator, paper clip, conical flasks and pipettes. Secondly, some chemical were used, for example, hydrated copper sulphate, water, concentrate hydrochloric acid, ammonia solution. The last but one, students should wear the coat and safety glasses in the experiment. Part A First, the inside of crucible was cleaned. Second, a paper clip was placed into the crucible and weighed by electronic balance. The weight was recorded down to 0.01g. Third, 3g of copper sulphate was placed into the crucible using the spatula, and was weighed by the electronic balance. Fourth, the burner was lit, and was put under the stand. The paper clip and copper (II) sulphate was placed on the stand and was heated for about 5 minutes. The crystal was stirred with the paper clip. The colour was observed. Fifth, the crucible was placed inside the dessicator for 5 minutes to cool down using tongs (The paper clip was left in the crucible). Sixth, the crucible was weighted when it was cool enough. At last, some water was added into the crucible and indicates the blue colour which is the colour of crystallization of water. Part B Firstly, some copper sulphate and water was put into 3 conical flasks and was shaken to dissolve. Secondly, concentrated hydrochloric acid was dropped into one conical flask using a pipette and observed. Lastly, some ammonia acid was dropped into a second conical flask using another pipette until the colour changed. The colour of this solution should observe carefully after different volume ammonia acid was added. Discussion Part A The chemical formula in part A is CuSO4 (aq) Â · xH2O (l) > CuSO4 (aq) + xH2O (l) Mr 160 + 18x 160 Mass 2.22g 1.4g 1.4 (160 + 18x) = 160 * 2.22 224 + 25.2 = 355.2 25.2 x = 131.2 x = 5.20634 Therefore, x is equal to 5. Here is an explanation of the calculation. The Mr of CuSO4 is 160, and the Mr of water is 18x which the x is still a unknown value. The mass of CuSO4 and water is 2.22g and 1.4g. The number cross multiplies with each other. As a result, the x was come out. Thus, the value of x is slight greater than predict. According to the theory, the right result should be lower than 5 value, maybe the copper sulphate was oxidised, and the water of crystallization was not evaporated enough so that influence the final result. The copper (II) sulphate became black because of the oxidation of the copper. The copper (II) sulphate in the experiment was heated twice in order to make the water of crystallization evaporate completely. If it heated too strongly, the colour of copper sulphate will turn to black. The chemical equation of this reaction is: CuSO4 (aq) > CuO (s) + SO3 (g) Part B One of the reasons why the colour changed is causes by spectrum. The copper (II) sulphate indicated blue in the experiment. Because when the ordinary sunlight passes through the solution, the solution absorbed the wavelengths of the light. The red area in the spectrum was absorbed by the copper (II) ions. However, the sunlight which through the solution and on the other side of the conical flasks made the solution indicates the colour except red. The blue colour is the mixture of wavelengths (Chemguide, 2009). The colour changed in ammonia solution added into copper (II) sulphate is causes by the complex. The light blue colour substance was indicated, and this is basic copper sulphate precipitate. After more ammonia solution was poured into the solution, the precipitate will dissolve and produce [Cu (NH3)4] 2+ which is an indigo colour substance and replaced the basic copper sulphate, and water molecule was replaced by ammonia (Chemguide, 2009). The chemical equation is: Cu2 (l) + 4NH3 (l) > [Cu (NH3)4] 2+ (aq) The transition metals have their own colour causes by d orbital. When the HCl was poured into copper (II) sulphate solution, the [Cu (H2O) 6]2+ was produced, and the colour of this ion is blue. After that, the [CuCl4]2+ was produced, and its colour is yellow. However, the solution was turned to green. Lister and Renshaw (2000, p476) pointed out that the energy gap between d orbital is suitable for the frequency of electromagnetic radiation in the ordinary light, as a result, most of the transition metal has its own colour. Conclusion To summarize, part A shows that how to calculate the water of crystallization, and colour changed between hydrated copper (II) sulphate and anhydrous copper (II) sulphate. In part B shows the definition of ligands, complexes and colour change cause by the spectrum. Reference Baike.Baidu [online] (2009) Available at: http://baike.baidu.com/view/1729.htm?fr=ala0_1_1 Accessed date: December 28, 2009 Chemguide [online] (2009) Available at: http://www.chemguide.co.uk/inorganic/complexions/colour.html Accessed date: January 6, 2010 Chmicalland21 [online] (nd) Available at: http://chemicalland21.com/industrialchem/inorganic/COPPER%20SULPHATE%20PENTAHYDRATE.htm Accessed date: January 10, 2010 Down.food126 [online] (2008) Available at: http://down.food126.com/download/view-software-3346.html Accessed date: December 28, 2009 Lister, R. and J., Renshaw (2000). Chemistry for Advanced Level (3rd edition). Cheltenham: Nelson Thornes Ltd, Accessed date: December 28, 2009 Lane, R (2009) Chemistry Practical 2 Handout Accessed date: December 28, 2009 Lookchem [online] (2008) Available at: http://www.lookchem.com/COPPER-II-SULFATE-PENTAHYDRATE-1-1-5-/ Accessed date: December 28, 2009 Science.Jrank [online] (2010) Available at: http://science.jrank.org/pages/13786/crystal-field-theory.html Accessed date: January 6, 2010

Shape Memory Alloys Research

Shape Memory Alloys Research 1.1 General considerations When a regular metallic alloy is subjected to an external force greater than its elastic limit, it deforms plastically, i.e. the deformation persists after returning to the unloaded state. The Shape Memory Alloys (SMAs) do not follow this behavior. At low temperatures, an SMA specimen may undergo a plastic deformation of about few percent, and then fully recover its initial shape that had at higher temperature by simple heating above a threshold temperature. Their ability to recover their form when the temperature is raised, makes this class of materials unique. This phenomenon has been discovered in 1938 by researchers working on the gold-cadmium alloys [Gilbertson (1994)]. The shape memory effect remained a laboratory curiosity until 1963, when the first industrial and medical applications appeared. 1.2 Martensitic Transformation The shape memory effect is based on the existence of a reversible phase transformation of thermoelastic martensitic type [Kurdjumov, Khandros (1949), Kumar, Lagoudas (2008)], between a microstructural state at high temperature (austenite phase) and a microstructural state at low temperature (martensite phase) [Patoor et al. (2006), Lagoudas et al. (2006)]. Austenite has in general a cubic crystal lattice, while martensite is of tetragonal, monoclinic, or orthorhombic crystal lattice. The transformation from one crystal lattice to the other occurs by distortion of the shear lattice does and not by atoms diffusion. This type of transformation is called martensitic transformation [Perkins (1975), Funakubo (1987), Otsuka, Wayman (1999)]. In reality, the matrenitic transformation in SMAs is a phase transformation of the first order, where there is co-existence of several phases, and there is presence of interfaces between the phases [Guà ©nin (1986)]. Historically, the term martensitic transformation describes the transformation of the austenite of steels (iron-carbon alloys) to martensite during a quenching. By extension, this term has been generalized to a large number of alloys whose phase transformations have certain characteristics typical of the transformation of steels [Rosa (2013)]. During martensitic transformation of a SMA, the crystal lattice of the material changes its shape. The microstructure of martensite is characterized by a change in shape and by the difference in volume, which exists between matrensitic and austenitic phase [Duerig et al. (1990)]. Therefore, internal strains arise during the emergence of martensitic areas within the austenite. The internal strains can be partially relaxed by the formation of several areas of self-accommodated martensite crystals that minimize the overall deformation induced. These areas called variants and are oriented in different crystallographic directions [Kumar (2008)]. In the absence of external strains, these variants are equally possible and the distribution of self-accommodated groups allows the material to be transformed in order to retain its original shape. Therefore, the formation of the martensite results in elastic (reversible) deformations [Funakubo (1987)]. At constant temperature, the martensite-austenite interfaces are in steady state. A change in temperature in one direction or the other results in moving these interfaces to the benefit of one or the other phase structure. The interfaces can also move under the action of an imposed strain. A specimen can therefore be distorted not by sliding, which is the usual mechanism of plastic deformation, but by the appearance and disappearance of martensite variants [Kumar (2008)]. Therefore, during martensitic transformation atoms in the structure move on very small distances leading to deformation of the crystal lattice. This causes a small variation in volume with shearing of the structure in a specific direction. During the transformation process, the growth of martensite crystals occur in form of platelets to minimize the energy at the interface. The martensitic variants can occur in two different types: twinned martensite (formed by combination of self-accommodated martensite variants) and detwinned martensite (reoriented martensite) where a particular variant dominates [Liu, Xie (2007)]. The characteristic behavior of SMAs is based upon the reversible phase transformation from austenitic phase to martensitic phase and the opposite. By cooling under zero loading, the crystal sructure changes from austenitic to martensitic phase (forward transformation to twinned martensitic phase). This transformation is resulting in the development of a number of martensitic variants, which are arranged in a way that the average change in macroscopic shape is insignificant, causing a twinned martensite [Leclercq, Lexcellent (1996)]. When the material is heated at the martensite phase, the crystal structure is transforming to austenite (reverse transformation from detwinned martensitic to austenitic phase), leading to recovery of shape [Sabu ri, Nenno (1981), Shimizu, Otsuka, Perkins (1975)]. The above process is called Shape Memory Effect (SME) [Schetky (1979), Wayman, Harrison (1989)]. The martensitic transformation is characterized by four temperatures (Figure 2) [Gotthard, Lehnert (2001)]: MS: Temperature below which the martensite appears (martensite start) MF: Temperature below which the entire sample is transformed into martensite (martensite finish) AS: Temperature above which the austenite appears (austenite start) AF: Temperature above which the entire sample is transformed into austenite (austenite finish) The transformation begins at the cooling to the temperature MS. This transformation is completed to the temperature MF. Between these two temperatures, there is coexistence of two phases, which is a characteristic of transformation of the first order. If the cooling is interrupted, the material will not change. To go back to the initial shape, the temperature is increases so that the inverse transformation begins at the temperature AS and finishes to temperature AF, which is higher than MS [Massalski et al. (1990)]. If the trace on a diagram (Figure 1) the volume fraction of material processed as a function of temperature, there is a hysteresis loop, due to the presence of an irreversible energy corresponding to dissipation of mechanical energy transformed into heat [Ortin, Planes, Delaey (2006), Wei,Yang (1988)]. Figure 1 Martensitic transformation temperatures [Gotthard, Lehnert (2001)] The thermoelastic reversibility of the crystal lattice is certain in the case of an ordered alloy [Otsuka, Shimizu (1977)]. The correlation between the manifestation of martensitic transformation and atomic order was shown experimentally in Fe-Pt SMAs [Dunne, Wayman (1973)]. Nevertheless, in disordered alloys, such as Fe-Pd, Mn-Cu and In-TI, can occur thermoelastic transformation too. The atomic order is, therefore, a sufficient condition for manifestation of thermoelastic transformation, but not necessary [Otsuka, Shimizu (1977)]. 1.3 Thermomechanical properties of SMAs Several effects specific to the SMAs appear through the transformations of the crystal lattice as a function of temperature and of the field of stresses applied on the material [Duerig, Melton, Stà ¶ckel (2013)]. 1.3.1 Pseudoelastic Effect In general, by pseudoelasticity we describe both the materials superelastic behavior, as well as rubble-like behavior. Superelastic behavior is called the reversible phase transformation produced by thermo-mechanical loading. Rubber-like effect refers to the reversible martensitic re-orientation. The stress-strain curve during this process resamples to the superelastic behavior, which is similar to rubbers nonlinear elastic behavior [Otsuka, Wayman (1999)]. Therefore, a part from inducing phase transformation thermally, martensitic transformation can also be prompt by applying on the material appropriately high mechanical loading, resulting in creating a martensitic phase from austenite. When the temperature of the SMA goes above AF, shape recovery is resulted while unloading. Such behavior of the material is termed pseudoelastic effect [Kumar (2008)]. Stress-induced martensite, is generally forming from austenite when external stress is present. The process of forming stress-induced martensite can occur through different thermomechanical loading routes [Miyazaki, Otsuka (1986)]. One form of stress-induced martensite is the detwinned martensitic phase formed from austenitic after application of external stress. The material, during the stress-induced martensitic transformation and the reversed process, shows nonlinear elastic behavior described by closed à Ã†â€™-ÃŽÂ µ curves. This nonlinear elastic behavior is called pseudoelastic transformation [Otsuka, K. and K. Shimizu (1981)]. The shape recovery is due to crystallographic reversibility of transformation, like in the shape memory effect. Hence, the two phenomena, transformation pseudoelasticity and shape memory effect are practically the same except the fact that reverse transformation is produced by warming the specimen to temperature above AF. In reality, an alloy that un dergoes thermoelastic martensitic transformation exhibits both transformation pseudoelasticity and shape memory effect [Otsuka, K. and K. Shimizu (1981)]. Nevertheless, for occurring transformation pseudoelasticity, the necessary stress for slip should be greater than that for stress-induced martensite transformation. As an example, we can refer to equiatomic Ti-Ni alloys which are exposed to slip and do not exhibit any transformation pseudoelasticity, regardless of their Ni content. It was shown, however, that Ni-rich Ti-Ni alloys subjected to annealing after cold working, causing refining of their grain size, leads in raising critical slip stress, which results in any transformation pseudoelasticity [Miyazaki et al. (1982), Saburi, Tatsumi, Nenno (1982), Saburi, Yoshida, Nenno (1984)]. The existence of transformation pseudoelasticity is affected by crystalline orientation, composition of the alloy, and direction of applied stresses [Miyazaki, Otsuka (1986)]. 1.3.2 One-Way Shape Memory Effect Another property of SMAs is the one-way shape memory effect. It takes place in four steps: (1) The material is cooled to a temperature lower than MF (the parent austenitic phase) to obtain self-accommodated martensite. (2) Re-orientation of variants of the martensite is obtained via application of stress. (3) The stress is released at constant temperature T F. The material remains to a shape depending on the stress field. (4) The sample is heated at a temperature T > AF making re-appear the austenitic phase and the material gets its original shape, as shown in Figure 2. Figure 2 One-way shape memory effect [Miyazaki, Otsuka (1986)] Two conditions are necessary for occurring shape recovery by shape memory effect. Firstly, the transformation should be reversible, and second, slip should not occur during the entire deformation process. Martensitic transformations in ordered alloys are reversible in nature [Miyazaki, Otsuka (1986), Arbuzova, Khandros (1964)], so the entire shape memory effect mainly occurs in this type of alloys. The second condition is necessary because in the case of high stress and every type of deformation mode (stress-induced martensitic transformation in parent phase, twinning in the martensitic phase) slip can be induced, resulting in plastic strain and, not completed recovery of shape. In the one-way shape memory effect, the shape in memory by the SMA is the one of the parent phase. 1.3.3 Two-Way Shape Memory Effect The two-way shape memory effect is the reversible passage of a shape at a high temperature to another shape at low temperature under stress. The two-way shape memory effect should precede the SMA training [Nagasawa, et al. (1974]. Training of SMAs consists of temperature cycling at constant stress or stress cycling at constant temperature. During training, microstructural defects (i.e. dislocations) lead to internal stresses and therefore promote oriented martensite. A SMA subjected to training can then move from austenitic phase to oriented martensite under zero load by simple change of temperature [Schroeder, Wayman (1977)]. It has then a shape in memory for each of the two phases. Various methods that cause two-way shape memory effect have been suggested, such as, large deformation in stress-induced martensite transformation at temperatures > MS [Delaey et al. (1974)], shape memory effect training [Schroeder, Wayman (1977)], stress-induced martensite training [Schroeder, Wayman (1977)], training involving both of shape memory effect as well as stress-induced martensite [Perkins, Sponholz (1984)] remaining in martensite state while heating at a temperature > AF [Takezawa, Shindo, Sato (1976)], as well as using precipitates [Tadaki, Otsuka, Shimizu (1988)]. 1.4 Transformation Induced Plasticity (TRIP) Several experimental studies have shown the development of nonlinear plastic (irreversible) strain when phase transformations occur [Greenwood, Johnson (1965), Abrassart (1972), Magee (1966), Desalos (1981), Olson, Cohen (1986), Denis et al. (1982)]. This mechanism of deformation is termed Transformation Induced Plasticity (TRIP), resulting from internal stress rising from the change in volume related to the transformation, as well as from the associated change in shape [Marketz, Fischer (1994)]. TRIP differs from classical plasticity. Although plasticity is caused from the applied stress or variation in temperature, TRIP is triggered by phase variations, and occurs even at low and constant stress levels [Gautier et al. (1989), Leblond et al. (1989), Gautier (1998), Tanaka, Sato (1985), Fischer et al. (2000, 1996)]. TRIP takes place because of two separate mechanisms. The first, refers to a process of accommodation of micro-plasticity related to volume change [Greenwood, Johnson (196 5)]. The other, refers to an orientation caused by shear internal stresses, favoring the direction of preferred orientation for the formation of martensite when and external stress is present, which involves change in shape [Magee (1966)]. TRIP is caused by the difference in compactness of the lattice structure between the austenite (parent) and the martensite (product) phase [Greenwood, Johnson (1965)]. During martensitic transformation, this difference has produces a change in volume as well as internal stresses causing plasticity in the phase with less yield stress, which is weaker   [Paiva, Savi, Pacheco (2005)]. REFERENCES Abrassart, F., Influence des Transformations Martensitiques sur les Proprià ©tà ©s Mà ©caniques des Alliages du Systà ¨me Fe-Ni-Cr-C, Thà ¨se dÉtat, Università © de Nancy I (Trance), 1972. Arbuzova, I. and L. Khandros, Abnormal elongation and reduced resistance to plastic deformation due to martensitic transformation in the alloy CU-AL-NI. Phys. Metals Metallogr., 17(3), pp. 68-74, 1964. Delaey, L., et al., Thermoelasticity, pseudoelasticity and the memory effects associated with martensitic transformations. Journal of Materials Science, 9(9), pp. 1521-1535, 1974. Denis, S., Simon, A. and Beck, G., Estimation of the Effect of Stress/Phase Transformation Interaction when Calculating Internal Stress during Martensitic Quenching of Steel, Trans. Iron Steel Inst. Jap., Vol. 22, pp. 505, 1982. Desalos, Y., Comportement dilatomà ©trique et mà ©canique de lAustà ©nite Mà ©tastabledun Acier A 533, IRSID Report n. 95.34.94.01 MET 44, 1981. Duerig, T., K. Melton, D. Stockel, C. Wayman (Eds.), Engineering Aspects of Shape Memory Alloys, Butterworth-Heinemann, London, 1990. Duerig, T.W., K. Melton, and D. Stà ¶ckel, Engineering aspects of shape memory alloys,   Butterworth-Heinemann, 2013. Dunne, D. and C. Wayman, The effect of austenite ordering on the martensite transformation in Fe-Pt alloys near the composition Fe3Pt: I. Morphology and transformation characteristics. Metallurgical Transactions, 4(1), pp. 137-145, 1973. Fischer, F.D., Reisner, G., Werner, E., Tanaka, K., Cailletaud, G. and Antretter, T., A New View on Transformation Induced Plasticity, International Journal of Plasticity, vol. 16, pp. 723-748, 2000. Fischer, F.D., Sun, Q.P. and Tanaka, K., Transformation induced plasticity (TRIP), Applied Mechanics Review, Vol. 49, pp. 317-364, 1996. Funakubo, H. (Ed.), Shape Memory Alloys, Gordon and Breach Science Publishers, 1987. Funakubo, H., Shape Memory Alloys, Gordon and Breach Sci. Publ, New York, p. 275, 1987. Gautier, E., Dà ©formation de transformation et plasticità © de transformation, École dà ©tà © MH2M, Mà ©thodes dHomogà ©nà ©isation en Mà ©canique des Matà ©riaux, La Londe Les Maures (Var, France), 1998. Gautier, E., Zhang, X.M. and Simon, A., Role of Internal Stress State on Transformation Induced Plasticity and Transformation Mechanisms during the Progress of Stress Induced Phase Transformation, International Conference on Residual Stresses- ICRS2, (Ed: G. Beck, S. Denis and A. Simon), Elsevier Applied Science, London, pp. 777-783, 1989. Gilbertson, R. G. , Muscle Wires Project Book, Mondotronics, p. 2-1/2-8, 1994. Gotthard R. and T. Lehnert, Alliages à   mà ©moire de forme, Traità © des matà ©riaux n °19: Matà ©riaux à ©mergents, p. 81-105, 2001. Greenwood, G.W. Johnson, R.H., The Deformation of Metals under Small Stresses during Phase Transformation, Proceedings of the Royal Society A 283, pp. 403-422, 1965. Greenwood, G.W. and Johnson, R.H., The Deformation of Metals under Small Stresses during Phase Transformation, Proceedings of the Royal Society A 283, pp. 403-422, 1965. Guà ©nin, G., Alliages à   mà ©moire de forme, Techniques de lIngà ©nieur, vol. 10, p. 1-11, 1986. Kumar P., Introduction to Shape Memory Alloys, Shape Memory Alloys, 2008 Kumar, P. and D. Lagoudas, Shape Memory Alloys Modeling and Engineering Applications. 2008, Springer Science, New York, NY. Kurdjumov, G. V., L. G. Khandros, First reports of the thermoelastic behaviour of the martensitic phase of Au-Cd alloys, Doklady Akademii Nauk SSSR 66 (1949) 211-213. Lagoudas, D. C., P. B. Entchev, P. Popov, et al., Shape memory alloys, Part II: Modeling of polycrystals, Mechanics of Materials, vol. 38, p. 430-462, 2006. Leblond, J., Devaux, J. and Devaux, J.C., Mathematical Modeling of Transformation Plasticity in Steels I: Case of Ideal-plastic Phases, International Journal of Plasticity, Vol. 5, pp. 551-572, 1989. Leblond, J., Mathematical Modeling of Transformation Plasticity in Steels II: Coupling with Strain Hardening Phenomena, International Journal of Plasticity, Vol. 5, pp. 573-591, 1989. Leclercq S., and C. Lexcellent, A general macroscopic description of the thermomechanical behavior of shape memory alloys, Journal of the Mechanics and Physics of solids, 44, 953-980, 1996. Liu Y., and Z. Xie, Detwinning in shape memory alloy, In: Progress in Smart Materials and Structures, Ed. Peter L. Reece, pp. 29-65, 2007. Magee, C.L., Transformation Kinetics, Microplasticity and Aging of Martensite in Fe-31 Ni, Ph.D. thesis, Carnegie Institute of Technology, Pittsburg, PA, 1966. Marketz, F.   and   Fischer,   F.D.,   A   Micromechanical   Study   on   the   Coupling   Effect   Between   Microplastic Deformation and Martensitic Transformation, Computational Materials Science, Vol. 3, pp. 307-325, 1994. Massalski, T.B., et al., Binary alloy phase diagrams. vol. 3. ASM International, pp. 1485, 1990. Miyazaki S, Ohmi Y, Otsuka K, Suzuki Y. Characteristics of deformation and transformation pseudoelasticity in Ti-Ni alloys. Le Journal de Physique Colloques, 43, 1982. Miyazaki, S. and K. Otsuka, Deformation and transition behavior associated with theR-phase in Ti-Ni alloys. Metallurgical Transactions A, 17(1), pp. 53-63, 1986. Nagasawa, A., et al., Reversible shape memory effect. Scripta Metallurgica, 8(9), pp. 1055-1060, 1974. Olson, G.B. and Cohen, M., Mechanical Properties and Phase Transformation in Engineering Materials, TMS-AIME, Warrendale, Pa (Ed: S. D. Antolovich, R. O. Ritchie and W. W. Gerberich), pp.367, 1986. Ortin, J., A. Planes and L. Delaey , Hysteresis in Shape-Memory Materials in The Science of Hysteresis, (2006), pp. 467-553. Otsuka and K, Shimizu, K., Ser. Metall. 1, pp. 757-60, 1977. Otsuka, K. and K. Shimizu, Pseudoelasticity, In: Metals Forum, 1981. Otsuka, K., C. M.Wayman (Eds.), Shape Memory Materials, Cambridge University Press, Cambridge, 1999. Paiva, A., M.A. Savi, P.M. Pacheco, Modeling transformation induced plasticity in shape memory alloys, Proceedings of COBEM, 18th International Congress of Mechanical Engineering, Nov. 6-11, 2005, Ouro Preto, MG, 2005. Patoor, E., D. C. Lagoudas, P. B. Entchev, et al., Shape memory alloys, Part I: General properties and modeling of single crystals, Mechanics of Materials, vol. 38, p. 391-429, 2006. Perkins, J. and R. Sponholz, Stress-induced martensitic transformation cycling and two-way shape memory training in Cu-Zn-Al alloys. Metallurgical transactions A, 15(2), pp. 313-321, 1984. Perkins, J., Shape Memory Effects in Alloys, Plenum Press, New York, 1975. Rosa M., Phase Transformations in Steels, Volume 1: Fundamentals and Diffusion-Controlled Transformations, International Journal of Environmental Studies, vol. 70(2), pp. 337-338, 2013. Saburi, T. and S. Nenno, The shape memory effect and related phenomena. Solid to Solid Phase Transformations, pp. 1455-1479, 1981. Saburi, T., M. Yoshida, and S. Nenno, Deformation behavior of shape memory TiNi alloy crystals. Scripta metallurgica, 18(4), pp. 363-366, 1984. Saburi, T., T. Tatsumi, and S. Nenno, Effects of heat treatment on mechanical behavior of Ti-Ni alloys. Le Journal de Physique Colloques, 43(C4), pp. C4-261-C4-266, 1982. Schetky, L., Shape-memory alloys, Scientific American 241 (74-82), 1979. Schroeder, T. and C. Wayman, The two-way shape memory effect and other training phenomena in Cu Zn single crystals. Scripta Metallurgica, 11(3), pp. 225-230, 1977. Shimizu, K., K. Otsuka, and J. Perkins, Shape Memory Effects in Alloys. Perkins, J., Ed.(New York: Plenum), pp. 60-87, 1975. Tadaki, T., K. Otsuka, and K. Shimizu, Shape memory alloys. Annual Review of Materials Science, 18(1), pp. 25-45, 1988. Takezawa, K., T. Shindo, and S.I. Sato, Shape memory effect in 1-CuZnAl alloys. Scripta Metallurgica, 10(1), pp. 13-18, 1976. Tanaka, K. and Sato, Y., A Mechanical View of Transformation-Induced Plasticity, Ingenieur Archiv 55, pp. 147-155, 1985. Wayman, M., J. Harrison, The origins of the shape memory effect, Journal of Minerals, Metals, and Materials 41 (99) pp. 26-28, 1989. Wei, Z., D. Yang, On the hysteresis loops and characteristic temperatures of thermoelastic martensitic transformations, Scripta Metallurgica, Volume 22, Issue 8, 1988, pp. 1245-1249.

The Beast Fable and Romance in the Nuns Priests Tale Essay -- Nuns Pri

The Beast Fable and Romance in the Nun's Priest Tale Chaucer utilized many literary forms when composing his Canterbury Tales. Among these forms he utilized were the beast fable and romance. We find elements of both of these forms in the Nun's Priest's Tale. Yet Chaucer was a decidingly original poet. When he took these forms he made them his. He often diverged from the accepted norms to come up with stories that were familiar to the fourteenth century reader yet also original. First let us look at the use of beast fable and how Chaucer diverged from tradition. One significant difference is that there is almost no human interaction with the animals. We have a brief description of the human inhabitants of the farm and then they disappear until the end. The true "humans" are the animals themselves as they possess almost total human qualities. For example, Chauntecleer and Pertelote are a "married" couple and bicker as humans. They also "love" each other. "He loved hir so that wel was him terwith" (VII. 2876). Most striking is the logical analysis both chickens are capable...

Mechanisms of LSD :: Biology Essays Research Papers

Mechanisms of LSD: a Glimpse into the Serotonergic System In 1938, Albert Hoffman discovered, invented a substance that would revolutionize the American drug culture forever and would change how we, as psychologists and biologists, thought about psychosis. That substance was LSD. A simple molecule, LSD has the potency that no other drug has. Only a drop will produce the desired hallucinations and euphoria. In addition, it does not seem to be physically addicting, although tolerance to the drug can develop in as few as three days but disappears after week of abstinence. Much 'research' has been done into the actual effects of the drug. LSD most profound effect on behavior is the production of sensory distortions, such as hallucinations, and euphoria. It also produces dilated pupils, increased blood pressure, and increased heart rate (7, 9). However, little is know about the mechanisms by which it acts. It is known that LSD affects the serotonergic system in the brain. However, the actual ways in which it acts on that system to modify behavior remains unclear. Before we explore the current research into LSD, it may be helpful to review some of the ways in which serotonin affects behavior. Serotonin (also called 5-HT) is a neurotransmitter that is produced from tryptophan. Although serotonin is only produced by a small number of neurons (1000's), each of those neurons innervates as many as 500,000 other neurons (3,12). For the most part, these neurons originate in the Locus Coerleus (LC) and the Raphe Nuclei (RN) (12). The LC controls the release of n orepinephrine, a neurotransmitter/hormone that regulates the sympathetic NS. It also has neurons that extend into the cerebellum, thalamus, hypothalamus, cerebral cortex, and hippocampus (12). The RN extends its projections into the brainstem and up into the brain (12). It has been suggested that neurons in this region of the brain may be responsible for the inhibition of sensation, thus "protecting the brain from sensory overload." (12) The fact that these two regions innervate virtually every part of the brain shows that serotonin can activate large portions of the brain from a relatively small area of origination. Serotonin seems to have an inhibitory effect on these neurons (1, 12). Thus, it would decrease the occurrence and frequency of action potentials in the neurons that it innervates. Because of this, it produces neural activity (of lack of activity) that are in some way an inhibition of behavior. Mechanisms of LSD :: Biology Essays Research Papers Mechanisms of LSD: a Glimpse into the Serotonergic System In 1938, Albert Hoffman discovered, invented a substance that would revolutionize the American drug culture forever and would change how we, as psychologists and biologists, thought about psychosis. That substance was LSD. A simple molecule, LSD has the potency that no other drug has. Only a drop will produce the desired hallucinations and euphoria. In addition, it does not seem to be physically addicting, although tolerance to the drug can develop in as few as three days but disappears after week of abstinence. Much 'research' has been done into the actual effects of the drug. LSD most profound effect on behavior is the production of sensory distortions, such as hallucinations, and euphoria. It also produces dilated pupils, increased blood pressure, and increased heart rate (7, 9). However, little is know about the mechanisms by which it acts. It is known that LSD affects the serotonergic system in the brain. However, the actual ways in which it acts on that system to modify behavior remains unclear. Before we explore the current research into LSD, it may be helpful to review some of the ways in which serotonin affects behavior. Serotonin (also called 5-HT) is a neurotransmitter that is produced from tryptophan. Although serotonin is only produced by a small number of neurons (1000's), each of those neurons innervates as many as 500,000 other neurons (3,12). For the most part, these neurons originate in the Locus Coerleus (LC) and the Raphe Nuclei (RN) (12). The LC controls the release of n orepinephrine, a neurotransmitter/hormone that regulates the sympathetic NS. It also has neurons that extend into the cerebellum, thalamus, hypothalamus, cerebral cortex, and hippocampus (12). The RN extends its projections into the brainstem and up into the brain (12). It has been suggested that neurons in this region of the brain may be responsible for the inhibition of sensation, thus "protecting the brain from sensory overload." (12) The fact that these two regions innervate virtually every part of the brain shows that serotonin can activate large portions of the brain from a relatively small area of origination. Serotonin seems to have an inhibitory effect on these neurons (1, 12). Thus, it would decrease the occurrence and frequency of action potentials in the neurons that it innervates. Because of this, it produces neural activity (of lack of activity) that are in some way an inhibition of behavior.

Foreign Aid Speech

Australia's foreign aid should be reduced Today I'm bringing a serious subject that has Influenced the world and the development of countries around us into perspective. Foreign aid, and how the government should Increase It, but first we have to ask the question, â€Å"What Is foreign aid? ‘ Simply, It Is the economic, or military lad given by one nation to another for purposes of relief and rehabilitation, for economic stabilization, or for mutual defense. The 620 or group of 20 is the premier forum for its members' international economic cooperation and decision making.And their existence is more important than ever because the world's economy is in such a precarious state and so the decisions they make will be vital in the development of poorer countries. A part of this that people may not recognize is that when the economy is weak, the poorest countries suffer the most. $1 dollar can help a hundred people in a poor country more than it can help someone in a rich or develo ped country. Although we have stronger affinity towards our citizens and if money was equally effective we would whose our own citizens first, when it's 100 times more effective in impacting lives, then we think we're all human beings.The suffering of a mother whose child Is sick and might die Is a universal value. And If a dollar has so much Impact then I must ask you, not as a student, but as a fellow human: why are we all still so greedy? If I were to ask you what percentage of the federal budget is spent on foreign aid, would you be surprised that it is 0. 35%? That equates to $5. 44 billion dollars of our IN (gross national income) in 2012. The government expects to reach 0. 5% by 2017, but in recent media, Julie Bishop, the Minister of foreign affairs has implemented a cap of 5 billion dollars over the next two financial years.The promise Australia made with the UN along with many other developed countries, was an agreed 0. 7% of our countries IN. The 2014 Australian budget IS a broken election promise to the world's poorest people. The Abbott Government has torn up its promise to Increase aid. This year's budget, announced two days ago, shows that the Australian government Is cutting rut the most vulnerable members of the communities around the world. Every second we breathe, 30, 000 children under the age of five die from preventable diseases.It is made evident that Australia's contribution to alleviate poverty through overseas aid is successful. The average life expectancy of individuals living in developing countries has increased by approximately twenty years in the last decade, which is substantial in contrast to the figures fifty years ago. Vaunt has reduced the incidence of malaria by 80% with the support of Australian aid. It is a myth that reign aid doesn't work. 79% of Australians, according to the essential report, agree that the Government should reduce spending in foreign aid when 41% don't know what it Is.The ignorance surrounding foreign aid Is what potentates suffering of individuals living In developing countries. Australia Is already providing less foreign aid compared to other developed countries. We are ranked 1 13th. The Abbott Government's abolition of Causal, which manages our tax dollars for overseas aid, Is because they want to see a better alignment between aid, trade and diplomatic erection and aid programs going in another direction† yet there is no evidence for this. Aid vs.. Diplomacy is a false dichotomy.Helping neighboring countries develop strong economies means a better market for our own goods. Helping our neighbors improve their health systems means fewer health threats. Increasing the number of children in our region going to school reduces the opportunity for indoctrination in place of education. The success of our neighbors are good for us. In 2006 and 2007, Australia gave 2. 9 billion dollars through Said and in 2013, 2014, it grew to 5. 44 lion dollars, almost doubling the overseas as sistance.Now, the proportion of aid to IN is back to 2000, 2001 levels under Abbot's government, especially now that foreign aid will grow in line with the Consumer Price Index or inflation rate. With the help of global initiatives, the number of people living in poverty has fallen by 200 million people since 1980 and increasing. Australia shouldn't turn their back on the less fortunate as an affluent country. The children suffering every single day rely on our international aid. The government has slashed the foreign aid budget which asses many problems and places a strain on our relationship with other countries.If Australia works with the countries we're aiding, to redirect foreign aid funds to priorities assets, deregulate their economy and opened up their economy to global trade for economic growth, then the output of foreign aid would be effective in forming a sustainable economy and alleviating poverty. We should raise our Foreign aid budget to the agreed 0. 7% IN. Australia is a generous country, we can afford to provide aid to those in need and grow, not only as a country, but as humans of this earth.

Argumentative Essay Against Euthanasia Essay

admissioneuthanasia is the practice of deliberately sidesplitting a person to spare him or her from having to deal with more pain and suffering. This is perpetually a controversial issue because of the incorrupt and ethical components that are involved. This paper leave alone discuss the arguments against benignity landing.DiscussionEuthanasia is understandably against the Hippocratic Oath that all doctors gain to fulfil. This oath basically states that doctors must neer be involved in the cleanup of good deal because after all, they take a shit been adroit to ensure that people are equal to(p) to observe from their infirmitys and injuries. Doctors are the ones whom people go out their lives whenever there is something wrong with their wellness. Thus, it is the responsibility of the doctors to invariably do the best they fire to succor people live and enjoy their lives (Cavan 48). If their patients spend under their supervision, the doctors tail assembly accept this for as long as they know and can prove that they really did their best and worn all possibilities to ensure the survival of the patients. in that location are just certain instances where the disease or the injury of the patients has be amount so serious that it is already difficult to compensate and manufacture the patients recover. In these cases, it is unfair to doom the doctors for the death of the patients. The Hippocratic Oath helps the doctors to put one over how important their responsibilities are to the people in terms of their health. This oath also provides an self-assertion to the people that they can trust their doctors and be assured that they ordain do whatever is necessary to help them deal with their health problems. If euthanasia arrives legalized, then the effectiveness of the Hippocratic Oath leave behind be negated and the doctors can have the option of immediately resorting to euthanasia especially in difficult cases kinda of trying their bes t until the very end. other argument against euthanasia is that it is essentially homicidebecause the doctors will kill the patient even if it has been O.K. by the patient himself or the family of the patient. Euthanasia is not that different from shoot because they some(prenominal) involve killing a person. The and difference is that in euthanasia, there is mercy and accord involved while in murder there is none (Tulloch 82). If murder is prohibited by law because people take matters into their own work force and kill others, then euthanasia should also be banned because doctors take matters into their own hands and kill their patients even if there is consent from the patients and their families or relatives.Lastly, the continued improvements and innovations in the world of medicine and health care make euthanasia illogical to be use as an option. The reason why aesculapian experts continue to work hard to come up with improved medical technologies, medicines and sermon methods is that they want to make sure that the down in the mouth people are able to recover faster and healthy people run low even healthier. All of these efforts are universe done to make the society become more productive due to the carriage of healthy and strong people (McDougall 26). Thus, doctors will not have an excuse for not doing their best for their patients as they already have access to the best medical technologies, medicines and discussion methods that will prevent them from having to resort to euthanasia as the only option.Conclusion in that respect is no doubt that euthanasia involve to be banned as establish on the three arguments discussed above, it does not be a place in gentlemans gentleman society. Doctors must never give up on their patients no matter how heartsick the situation might be. They must squeeze out all options to give their patients a contend chance to survive and

Arterial Blood Gas Essay

Understanding arterial job gases can sometimes be conf apply. A logical and systematic approach using these steps makes interpretation much easier. Applying the concepts of acidbase commensurateness will help the healthcare supplier follow the progress of a patient and evaluate the military capability of care cosmos provided. Copyright 2004 Orlando Regional Healthcare, Education & suppuration Glossary ABG arterial blood gas. A test that analyzes arterial blood for group O, ascorbic acid dioxide and bi carbon paperate content in rise to power to blood pH. Used to test the effectiveness of ventilation.Acidosis a pathologic state characterized by an increase in the preoccupation of henry ions in the arterial blood higher up the normal level. May be caused by an accumulation of carbon dioxide or acid-forming products of metabolism or a by a abate in the concentration of alkaline compounds. Alkalosis a state characterized by a decrease in the atomic number 1 ion concentra tion of arterial blood infra normal level. The condition may be caused by an increase in the concentration of alkaline compounds, or by decrease in the concentration of acidic compounds or carbon dioxide.Chronic obstruction pulmonic disease (COPD) a disease transition involving chronic inflammation of the airways, including chronic bronchitis (disease in the large airways) and emphysema (disease located in smaller airways and alveolar regions). The obstruction is largely permanent and progressive over time. Diamox a carbonic anhydrase inhibitor that decreases H+ ion secretion and increases HCO3 excretions by the kidneys, causing a diuretic effect.Hyperventilation a state in which there is an increase amount of air entree the pulmonic alveoli (increased alveolar ventilation), resulting in reduction of carbon dioxide tension and eventually leading to alkalosis. Hypoventilation a state in which there is a reduced amount of air entering the pulmonary alveoli. Hypoxemia below-norm al group O content in arterial blood due to inadequate oxygenation of the blood and resulting in hypoxia. Hypoxia reduction of oxygen supply to tissue below physiological levels despite adequate perfusion of the tissue by blood.Iatrogenic any condition bring on in a patient by the effects of medical treatment. Kussmauls respirations deviant breathing pattern brought on by strenuous exercise or metabolic acidosis, and is characterized by an increased ventilatory rate, actually large tidal volume, and no expiratory pause. Oxygen delivery system a device used to deliver oxygen concentrations above ambient air to the lungs with the upper airway. Oxygenation the process of supplying, treating or fuse with oxygen.Oxyhemoglobin hemoglobin in combine with oxygen. Pneumothorax an abnormal state characterized by the front man of gas (as air) in the plueral cavity. Pulmonary embolism the lodgment of a blood choke off in the lumen of a pulmonary artery, causing a severe disfunctio n in respiratory function. Thyro noxiousosis toxic condition due to hyperactivity of the thyroid gland. Symptoms involve rapid heart rate, tremors, increased metabolic basal metabolism, nervous symptoms and loss of weight.

How to write an introduction for a dissertation?

The introduction is the starting point of your dissertation. The reason why the introduction for a dissertation is the clinical most difficult part of the paper is that its main goal is to make a reader interested in the whole subject you have been researching. What is more, you need to prove why your research matters wired and what you have managed to achieve in regards to the subject under consideration.Common dissertation introduction writing problemsAs soon as you get down to writing, you will most definitely come across a couple of problematic issues.Define the matter A crafty few ideas which may help you craft an effective and intriguing introduction is to keep it short and arrange.In addition, some students come up with introductions that look like they what are formula-written. Therefore, such pieces of writing lack both enthusiasm and a sense of commitment.Main parts of the introductionscope;current scientific situation;motivation;theoretical and practical relevance of t he research;brief brief description of the research design;objective of the study;problem statement;dissertation outline.You need to begin with stating the motive for your research.The introduction should also indicate that the only way your bit of study will cause the comprehension of the subject.

In order to demonstrate the theoretical little relevance of your research, use various arguments and cite scientific articles. Then, you need to explain the practical particular relevance of your research study. Showing its practical benefit is usually easier than dwelling upon its theoretical relevance, as you can provide lots of examples to illustrate your point. Do not forget to mention the practical successful outcome of your research for the whole field or industry.An introduction is merely among the elements of a dissertation.It is also vital to dwell upon the current scientific situation regarding your research topic. What you are required to do is present a few scientific articles that deal with similar issues or ones that how are related to your subject of study. Briefly explain the gist and the main message of those articles. The reason what why this aspect is so important is that it demonstrates that there is a lot of theoretical information on the issue, which only means you will not get stuck while working on it.Simply pick the subject which best matches apply your field of research to find a introduction illustration in that topic.

Try to summarize the gist of each chapter in one sentence. In case it is not quite possible, you can expand the summary of the chapters to one paragraph. Keep in mind that the brief outline should not be repetitively phrased. Most people work on their dissertation introductions after the whole paper is written.Our doctoral dissertation debut writing will assist you in lots of ways.Make sure you write to the point. Do not repeat yourself. Present useful information to the reader. Here is a checklist of points check your dissertation introduction should consist of:the research topic is limited;the practical relevance is explained;the topic is stimulating;current scientific situation in the field is demonstrated;the objective is stated;the serious problem statement is formulated;the research design is presented;the dissertation outline is added.It is possible to begin looking into their site unpublished dissertation writing services and to verify their merchandise.

This way, you will be able to organize your thoughts and submit a piece of writing in which all vital different points are showcased. Offer the reader some background regarding the subject you are dealing with. Clarify what the focus of check your study is. Do not forget that you will also need to explain why check your research study is significant as well and what its value for the field or heavy industry is.Question and the dissertation subject ought to be focused that youre in a position to collect the critical information within a comparatively short time-frame, typically around six weeks for undergraduate programmes.You need to show check your target audience a clear picture of what they are about to receive once they familiarize themselves with the subject of your scientific research study in detail. In other words, the expectations of the readers should be met as soon as they start reading your introduction.Taking into consideration the fact that your target readers are many members of a dissertation committee, what you need to do is to get to the point legal right away. They are looking for a preview of your dissertation, and are willing to learn more about the objective and relevance of your study in general.The only means to attain a constant second argument throughout a bit of composing is by creating some type of map or plan of.

Do not forget to define the public key terms of your dissertation. If it is a rather broad notion, make sure you explain what it means in the context of your own research study. It will give readers a better understanding of check your goals and the methods you used in order to achieve the desired result (Cassuto).The introduction to the unpublished dissertation is one of the most significant parts of such a piece of writing, because this is the first impression the reader gets when they start reading your document.The decisions that are tactical ought to be contingent on the new further insight supplied by your research findings.Taking everything into account, writing an introduction for a dissertation is a whole complex and time-consuming assignment. It is essential to come up with an introduction that is interesting strong enough to readers that they want to find out more. Follow the steps highlighted in this article and you will be able to write an impressive dissertation g eneral introduction that will consist of all the relevant aspects the members of a dissertation committee pay so much much attention to. Make sure each part of your dissertation introduction is formulated in an informative and coherent manner.Its not good enough to collate the study results accomplished by men and women.

Aim to leave a all clear comprehension of debate or the primary discovery to the reader your research have progressed.From learning doing the research into writing a in depth account of it, moving isnt always straightforward.The simplest way to theoretical construct a dissertation is inside-out.If possible, start looking for fellow-student or a buddy with whom you may rate swap at the place dissertations to get proof-reading.

Ib Math Ia

MATME/PF/M12/N12/M13/N13 maths threadb atomic number 18 aim The portfolio confinements For uptake in 2012 and 2013 supranational bachelors degree disposal 2010 7 pages For net discernment in 2012 and 2013 2 MATME/PF/M12/N12/M13/N13 C O N T E N TS T y p e I t as k s broadcasts T y p e I I t as k s tip output bullion ornament game school INTRODUC TI ON W h a t is t h e p u r p ose of t h is d oc u m e n t ? This memorial take holds crude chores for the portfolio in math SL. Theast southeast confinements speciate been produced by the IB, for instructors to substance ab give in the trial sessions in 2012 and 2013.It should be illustrious that just close to confinements antecedently produced and p fixed storageulgated by the IB testament no durable be binding for discernment afterward the November 2010 interrogative sentence session. These let in altogether the undertakings in apiece t apieceer back d experience hearty (TSM), and the t posit ionigates in the scroll tfolio t aims 2009 The t rents in the in the 2012 mental tests hike N O T in 2013. Copies of wholly TSM tasks promulgated by the IB atomic number 18 obtainable on the Online computer platform eye (OCC), under(a) midland Assessme non be enforced, still in approximately neuter form. W h a t h a p p e n s i f t e a c h e r s u s e t h e s e o l d t a s k s?The comprehension of these sometime(a) tasks in the portfolio leave look at the portfolio non -compliant, and such(prenominal) portfolios ordain thusly appeal a 10- blade penalisation. T distributivelyers whitethorn run to habituate the senior tasks as f be tasks, simply they should non be let in in the portfolio for utmost sagacity. W h a t o t h e r d oc u m e n t s s h o u l d I u se? deuce t sever every last(predicate)yers should p back copies of the maths SL give in charter ( secondly edition, kinfolk 2006), including the instruction method line of productss appendix, and the TSM (September 2005). unless reading, ncluding spare argumentations on entertaining the criteria, is operable on the Online broadcast core (OCC). in whole grave(p) unseasonedsworthiness items atomic number 18 too open on the OCC, as argon the fleece programme coordinator invoices, which express up epochd get hold otail fin education on a mannikin of issues. W h i c h t as k s c a n I u se i n 2012? The soely tasks produced by the IB that whitethorn be submitted for sound judgment in 2012 argon the singles contained in this put d own, and those in the memorandum Portfolio tasks 2011 2012 . on that bear down is no necessity to use of goods and services tasks produced by the IB, and there is no date bulwark on tasks compose by teachers.For lowest judgement in 2012 and 2013 3 MATME/PF/M12/N12/M13/N13 C a n I u se t h ese t as k s b e f o r e M a y 2012? These tasks should altogether be submitted for lowest legal opinion from whitethorn 2012 to November 2013. Students should non intromit them in portfolios so aner whitethorn 2012. If they ar take on, they get out be checkmate to a 10-mark penalty. transport note that these dates call down to mental test sessions, not when the extend is completed. W h i c h t as k s c a n I u se i n 2013? The hardly tasks produced by the IB that may be submitted for sagacity in 2013 are the onenesss contained in this document. T e c h n ologyThere is a wide tail fundamentemblyert of expert tools acquirable to raise numerical clobber. These include intense presentation cal imp lowlifeeators, travel by spreadsheets, Geogebra, Autographical recordical record, geometer vignette tab and Wolframalpha. umteen are unornamented downloads from the Internet. Students (and teachers) should be encourage to look which ones beaver aid the tasks that are fuckigned. Teachers are reminded that accep dodge engineering science use should resurrect the learning of the task. E x t r a c ts f r o m d i p lom a p r og r a m coo r d i n a to r n ot es all important(predicate) information is included in the DPCN, berthal on the OCC.Teachers should tick they are hygienic-known(prenominal) with these, and in particular(a) with the ones historied downstairs. ravish note that the deferred payment to the 2009/2010 document is outdated. C op i es of t as k s a n d m a r k i n g/sol u t ion k e ys Teachers are aware to spell their own tasks to live in with their own teaching plans, to select from the 2009/2010 document, or to use tasks scripted by some unalike teachers. In each case, teachers should excogitate the task themselves to make veri duck it is competent, and fork up a spell of the task, and an answer, dissolvent or bulls eye come across for whatsoever task submitted.This ordain armed service the moderators ratify the levels awarded by the teacher. It is especially important if teachers modify an IB pre tend task to include a double of the modified task. season this is permitted, teachers should deem conservatively about fashioning all changes, as the tasks stir been create verbally with all the criteria in mind, to provide students to grasp the high levels. N on -co m p l i a n t po r t f ol ios f r om M a y 2012 e ordinalrall note the pastime information on how to bed with portfolios that do not contain one task of each oddball. This allow for be utilise in the whitethorn 2012 and sequent examination sessions.If cardinal pieces of work are submitted, nevertheless they do not nominate a reference I and a case II task (for example, they are some(prenominal) vitrine I or twain(prenominal) compositors case II tasks), mark some(prenominal) tasks, one against each subject. For example, if a aspect has submitted two typecast I tasks, mark one use the suit I c riteria, and the opposite utilize the Type II Criteria. Do not apply some(prenominal) furt her penalty This correspondation that the up-to-date governance of patsy twain tasks against the corresponding criteria and whence applying a penalty of 10 mark will no prolonged be employ. For utmost judgement in 2012 and 2013 4 MATME/PF/M12/N12/M13/N13 SL T YPE IA im In this t ask you wi l l conside r a se t of numbe rs tha t a r e pr esent ed in a symme t r i c a l pa t t e rn. meet the five rowings of tot shown below. see how to obtain the numerator of the one-sixth row. dampenment engineering, plat the similitude mingled with the row number, n, and the numerator in each row. severalise what you government note from your plan of land and release a world-wide ac view to understand this. imbibe the sixth and 7th rows. pull back whatsoever patterns you used. permit E n ( r ) be the ( r 1) th factor in the nth row, commencement ceremony with r 15 illustration E5 (2) . 9 0. let on the familiar recital for E n ( r ) . turn out the stiffn ess of the frequent avowal by decision excess rows. talk of the reach and/or limitations of the full common description. explicate how you arrived at your planetary mastery. For nett discernment in 2012 and 2013 5 MATME/PF/M12/N12/M13/N13 C IR C L ES SL T YPE I A im The a im of this t ask is to invest i ga t e posi t ions of full stops in i nt e rse c t ing c i r c l es. The pursual plat shows a isthmus C 1 with reduce O and universal gas constant r, and each point P. r P O C1 The rotary converter C 2 has centerfield P and r OP. allow A be one of the points of ware of C 1 and C 2 . Circle C 3 has inwardness A, and rung r.The point P is the carrefour of C 3 with (OP). This is shown in the diagram below. C3 A O P P C2 C1 allow r 1 . lend oneself an analytic approach to make up ones mind OP , when OP 2 , OP 3 and OP 4 . key what you get word and bring out a cosmopolitan report to toy this. let OP 2 . insure OP , when r 2 , r 3 and r 4 . soak up w hat you watching and write a cosmopolitan controversy to represent this. chitchat whether or not this verbalizement is self-consistent with your precedent statement. intent engine room to ask otherwise value of r and OP. specify the worldwide statement for OP . Test the cogency of your normal statement by victimisation different put in of OP and r. contend the background knowledge and/or limitations of the widely distributed statement. rationalise how you arrived at the general statement. For nett butt endessment in 2012 and 2013 6 MATME/PF/M12/N12/M13/N13 F IS H PR O D U C T I O N SL T YPE II A im This t ask conside rs comme r c i a l f ishing in a pa r t i cul a r count ry in two di ff e r ent envi ronments the se a and f ish f a rms (aqua cul tur e). The da t a is t a k en f rom the U N St a t ist i cs D ivisi on C ommon D a t a b a se . The pursual hedge gives the sum total voltaic pile of tip caught in the sea, in thousands of thyroxines (1 tonne = guanine kilograms). Y ea rT ot a l M ass 1980 426. 8 1981 470. 2 1982 503. 4 1983 557. 3 1984 564. 7 1985 575. 4 1986 579. 8 1987 624. 7 1988 669. 9 Y ea r T ot a l M ass 1989 450. 5 1990 379. 0 1991 356. 9 1992 447. 5 1993 548. 8 1994 589. 8 1995 634. 0 1996 527. 8 1997 459. 1 Y ea r T ot a l M ass 1998 487. 2 1999 573. 8 2000 503. 3 2001 527. 7 2002 566. 7 2003 507. 8 2004 550. 5 2005 426. 5 2006 533. 0 circumscribe equateted variables and discourse each parameters/constraints. employ applied science, mend the information points from the striation back on a graph. acknowledge on both observable elans in your graph and nominate commensurate copys.analytically develop a mannikin that twins the information points. (You may incur it utilitarian to remember a combine of track downs. ) On a revolutionary manage of axes, hound your amaze hold up and the authentic information points. footnote on whatsoever differences. edict your impersonate if necess ary. The get across below gives the total megabucks of weight, in thousands of tonnes, from fish farms. Y ea r T ot a l M ass 1980 1. 4 1981 1. 5 1982 1. 7 1983 2. 0 1984 2. 2 1985 2. 7 1986 3. 1 1987 3. 3 1988 4. 1 Y ea r T ot a l M ass 1989 4. 4 1990 5. 8 1991 7. 8 1992 9. 1 1993 12. 4 1994 16. 0 1995 21. 6 1996 33. 2 1997 5. 5 Y ea r T ot a l M ass 1998 56. 7 1999 63. 0 2000 79. 0 2001 67. 2 2002 61. 2 2003 79. 9 2004 94. 7 2005 119. 8 2006 129. 0 fleck the info points from this circuit board on a graph, and question whether your uninflected fashion forge for the pilot light info fits the young information. delectation technology to detect a suitable homunculus for the freshly data. On a crude great deal of axes, sick both sits. argue how trends in the first gravel could be explained by trends in the second specimen. By considering both perplexs, treat manageable approaching trends in both types of fishing. For nett sound judgement in 2012 and 201 3 7MATME/PF/M12/N12/M13/N13 G O L D M E D A L H E I G H TS SL T YPE II A i m T he a i m of th i s t a sk i s to O lympi c G ames. high move up in the The table below gives the vizor (in centimeters) achieved by the money medalists at several(a) prodigious Games. 1932 Y ea r H e igh t (c m) 197 1936 203 1948 198 1952 204 1956 212 1960 216 1964 218 1968 224 1972 223 1976 225 1980 236 point out The exceeding Games were not held in 1940 and 1944. apply technology, plot the data points on a graph. restrict all variables used and state either parameters clearly. dispute each potential constraints of the task.What type of consumption casts the conduct of the graph? exempt wherefore you chose this function. Analytically create an equivalence to model the data in the in a higher place table. On a raw set of axes, couch your model function and the authorized graph. note on whatever differences. address the limitations of your model. discipline your model if necessar y. riding habit technology to come across other function that models the data. On a natural set of axes, draw both your model functions. chit chat on any differences. Had the Games been held in 1940 and 1944, foreshadow what the pleasing high school would collect been and explain your answers.Use your model to expect the harming superlative degree in 1984 and in 2016. description on your answers. The pastime table gives the win senior high school for all the other prodigious Games since 1896. 1896 xcl4 1908 1912 1920 1928 1984 1988 1992 1996 2000 2004 2008 Y ea r H eigh t (c m) 190 one hundred eighty 191 193 193 194 235 238 234 239 235 236 236 How well does your model fit the additional data? Discuss the general trend from 1896 to 2008, with item references to portentous fluctuations. What modifications, if any, motivating to be do to your model to fit the new data? For net sagacity in 2012 and 2013