Week Assignment

However, each company must access their unique situation and environment to determine if IT outsourcing is the method going forward. There can be immense fiscal and operational benefits, but also significant risks. Factors for Outsourcing The most obvious factor in whether or not to outsource is cost. Companies are driven by profits. If the cost of outsourcing ammonium's the Return on Investment (ROI) then it is unlikely executive management would consider the option. However, in today's environment companies like Amazon are able to achieve vast efficiencies by consolidating massive resources into a globalInfrastructure as a Service (alas) capability. Services like SAWS can establish thousands of virtual servers within an hour. All within Amazon's mature, secure, and stable environment Another factor for outsourcing is, in by doing so, allowing a company to focus on its core competency and not be burdened by IT requirements. Additionally, companies like SAWS provide robust, scalable, and leading edge capabilities that would be, for most, excessively burdensome to plan, implement, maintain, and operate. However, though SAWS can deliver organizational requirements to the majority of potential customers, some are more feasible than others.Big data companies which have massive analytics requirements need customized server configurations to attain deliverable efficiencies. Though Amazon and others have made strides in accomplishing just that, they cannot compete with a costly in-house implementation. Risks in Outsourcing Companies like Amazon have changed the thinking paradigm of risks associated with outsourcing IT. Not even 5-10 years ago companies were concerned with risks such as quality of services, reliable ¶y', and excessive dependency. Today the environment differs significantly. Companies sign up with Amazon in search of reliability.Quality of service is impeccable and Amazon institutes a fee for service marketing platform so companies only pay for what t hey use. However, there are other risks that cannot be overlooked. One of these key risks is security. Though Amazon likely has a healthy security posture, due to their immense success, has also become a key hacker target. Storing all company data to an external vendor must make management a little uneasy. Corporate intellectual property and the trust of a company's customers can be shaken by one significant breach. Is it worth the risk?Outsourcing Costs Services like Amazon have made it increasingly attractive to consider outsourcing with their fee for service model. In a server brutalized environment CHIP cores, memory, and storage is shared. SAWS only charges customers for what they use. In the contrary, in an in-house solution, the costs don't stop when operations do. There are reoccurring costs associated with power, facilities, support contracts, etc. All these costs vanish when utilizing an alas capability such as SAWS. Not to mention a reduction in staff as robust IT staff w ill no longer be required if there is minimal infrastructure to support.Implications of Outsourcing IT If the decision is made to outsource IT, it would alter the face of the organization business structure as whole groups may be removed. Internal IT operations impact almost every facet of an organization. Finance and HER need to support the additional IT staff and IT operational costs. Fewer individuals typically reduce liability risks associated with general operations. Security needs to be enforced in data centers and other highly sensitive IT infrastructure areas. The need for a CIO and/or COT would be somewhat reduced.Lastly, the need for an IT tier 3 and above staff could be potentially completely eliminated. Outsourcing IT would create a lean organization focused on its core competencies and more likely to attain that elusive competitive advantage in its marketplace. Outsourcing IT is here and it's here to stay. Companies will find it more and more difficult to be competitive in a market where your competitors are not burdened by IT requirements. Cost, efficiencies, and strategic vision are several of the many factors to consider with IT outsourcing. Week Assignment With respect to the tasks and duties of the administrative anager, the successful candidate is responsible for maintaining administrative staff through recruitment, selection, organization, orientation, and constant training; maintaining a secure and safe job environment; initiating and developing opportunities for employee growth and development; accomplishing employee resu Its through effective communication of job expectations, timely planning, continuous monitoring, and periodic appraisal of job results; provision of coaching and counselling services for the employees; overseeing of discipline matters within the organization; and initiating, enforcing, and coordinating organizational olicies and vital procedures. In addition, s/he will ensure strong labor relations and employment conditions, maintain records, prepare reports, compose correspondence, and develop budget recommendations for personal services and capital outlay.To execute the abovementioned duties with ease, the admi nistrative assistant will require various technological tools and equipment. In this regard, s/he should be well versed with use of laptop computers, personal digital assistants, multi-line telephone systems, and photocopying equipment. In addition a suitable candidate should be onversant with the technology that is essential for this occupation. This includes accounting software, spreadsheet software, electronic mail software, enterprise resource planning software, and desktop publishing software. Besides having essential technological competencies, a suitable administrative assistant should be knowledgeable in different areas and have diverse skills and abilities.In this regard, s/he should have knowledge of the principles of personal as well as customer services, clerical systems and procedures, English language, mathematics, economics and accounting, omputers and electronics, personnel and human resources, and sales and marketing. Fundamental skills for this job occupation range from active listening, effective coordination, time management, and speaking to critical thinking, sound judgment, effective decision making, and negotiation. Essential abilities entail oral expression, inductive and deductive reasoning, speech recognition and clarity, oral comprehension, written expression, and problem sensitivity. With respect to educational requirement, an ideal candidate should have a Bachelor's degree in Business Administration or any other related field.Recruitment Method The process of recruiting employees gives human resource managers an opportunity to reach out to prospective staffs and select suitable candidates for any job occupation. There are various ways that can be used to advertise the abovementioned post and select a suitable candidate to fill it. According to Gatewood, Field and Barrick (201 0), employment agencies locate and screen candidates on behalf of the employers. They use accredited procedures to choose suitable staffs and present them to employers within the shortest time. using this, employers are able to access individuals that ave sufficient relevant skills in a timely manner. Relative to this is employment of online recruitment companies or job banks.Gatewood et al (2010) ascertains that there are various online recruitment companies that give employers an opportunity to advertise emergent job opportunities. ikewise, this approach enables employers to find suitable candidates quickly and cost effectively. In addition, employers using this strategy connect with applicants from diverse backgrounds. They are able to choose experienced candidates whose qualifications are consistent with their job specifications. Assessment Methods As indicated earlier, successful organizational wellbeing relies on the effective performance of its human resources. Ma and Allen (2009) posit that to ensure recruitment Of competent staff, it is vital to understand employee behavior.Presumably, behavior influences attitudes and decisions of staffs in different ways. Psychometric tests can be used to evaluate qualified candidates to determine and understand their individuality. Results of these measurement tools are imperative for predicting employee behavior and maximizing their value with respect to job performance. From the job description, it is pparent that the administrative assistant will interact with fellow employees as well as clients at different levels. Effective performance requires high level commitment and relevant and sufficient competencies including strong interpersonal skills. Employee behavior has direct impacts on his or her mannerisms and general wellbeing.Upfront determination of this enables employers to optimize staff performance by providing suitable opportun ities for empowerment, growth, and development in a timely manner. Another ideal employee assessment method in this context would be use of oral nterviews. The interview strategy is important for generating vital information pertaining to the attitudes, skills, and behaviors of employees (DeCenzo, Robbins , 2012). Using well-structured and customized interview schedules, employers lure the staffs into providing a wealth of information about their abilities, opinions, and experiences. Using this information, employers are able to make vital decisions regarding ideal job placements, resource allocation, and strategic planning. Week Assignment He's bursting with excitement about everything the â€Å"new world† has to offer. He literally tells everyone in England to make the voyage. But that each parish, or village, in Cite, or Country, that will but apparel their fatherless children, of heritage or fourteen years of age, or young married people, that have small wealth to live on; here by their labor may live exceeding well: provided always that first there bee a sufficient power to command them, houses to receive them, means to defend them, and meet provisions for them. † (52) Smith is incredibly passionate about the land here, and obviously thinks it has more to offer than England. However, he also urges the English that they need a vast array of occupations here to truly thrive.He also tells them that they, too, will succeed. â€Å"Carpenters, Masons, Fishers, Fowlers, Gardeners, Husbandmen, Sawyers, Smiths, Spinsters, Tailors, Weavers, and such Like The Masters by this may quickly grower rich. † (52) On the other hand, William Bradford writes in â€Å"Of Plymouth Plantation† how remarkably dangerous the trip across the water actually is. The footnote to the first portion of the first sentence refers to a ship going down and everyone having to move themselves and their possessions from the Speedwell to the Mayflower.Not everyone survived the crossing; one seaman and one passenger died while at sea: â€Å"There was a proud and err profane young man, one of the seamen, of a lusty, able body, which made him more the haughty; he would always be contemning the poor people in their sickness and cursing them daily with grievous execration's; and did not let to tell them that he hoped to help cast half of them overboard before they came to their Journeys end, and to make merry with what they had; and If he were by any gently reproved, he would curse and swear most bitterly.But It pleased God before they came half seas over, to smite this young man with a grievous disease, of whi ch he died In a separate manner, and so was himself the first that was thrown overboard. † (54) I can about being seasick ends up the first to perish on the sea. Was it Just an ironic work of fate, or was it karma? Bradford writes in quick detail about the storms they faced and survived, which landed them in Cape Cod. He details one of the storms where they had to drift and could not sail onward. And in one of them, as they thus lay at hull in a mighty storm, a lusty young man called John Holland, coming upon some occasion above the gratings was, with a sell of the ship, thrown into sea; but it leased God that he caught hold of the topsail halyards which hung overboard and ran out at length. † (55) Bradford continues in his book about how they found a place to reside, but it wasn't without worry. The Pilgrims had to be extremely careful any time they went out to hunt or gather food and water, any time they explored a new territory, and any time they slept!The weather was turning cold, and they needed food and a place to build homes. They came across an abandoned Indian dwelling and took what food they found. â€Å"Which, they digging up, found in them divers fair Indian baskets filled with corn, and some in ears, fair and good, of divers colors†¦ † (60) After their dinghy was fixed and ready for shallower waters, they â€Å"found more of [the Indians'] corn and of their beans of various colors. † (60) If the Pilgrims hadn't come across the Indian's corn and beans, along with the seeds, they would have likely starved.It took them a month to find a decent place to settle and make camp, and an additional 10 days to actually get to the area free from Indians and start building. They had started exploring the lands on November 1 5th, then â€Å"On the 1 5th of December they weighed anchor to go to the place they had discovered, and came within two leagues of it, but were fain to bear up again; but on the 16th day, the wind came fair, and they arrived safe in this harbor.And afterwards took better view of the place, and resolved where to pitch their dwelling; and the 25th day began to erect the first house for common use to receive them and their goods. † (64) While on the Mayflower, there were Pilgrims (those who made the passage for religious reasons) and Strangers (those who came for business). The Pilgrims came together and wrote he Mayflower Compact, which is widely believed to have been the foundation of our Constitution. After this they chose, or rather confirmed, Mr.. John Carver (a man godly and well approved amongst them) their Governor for that year. † (65) Our excerpt of Bradford book concludes with their first Thanksgiving. They had a small harvest and started bracing their houses against the coming winter. The Pilgrims that survived the trip and the illnesses after coming to land were â€Å"well recovered in health and strength and had all things in good plenty. † (66) Week assignment Pornography degrades values that are held in high regard in a society. Pornography ought to be recognized as a form of free speech. And B B and C Question 8. 8. Which statement might be used to argue that pornography ought to be extensively regulated? (Points : 1) Pornography demonstrates realistic forms of sexual intercourse. Pornography provides enjoyment to millions of people. Pornography denigrates women. Pornography creates realistic perspectives about healthy relationships. None of the above Question 9. 9.Which statement might a libertarian most agree with? (Points : 1) The state should be responsible for the welfare of its citizens. The state should be allowed to restrict freedom whenever it deems it necessary to do so. Tate should restrict freedoms based on the greatest happiness of the citizens. The state should only be allowed to restrict behavior that harms others. None of the above Question 10. 10. John Stuart Mill would most agree with which statement? (Points : 1) The g overnment cannot limit freedoms of the citizens without circumstantial evidence.The government can only limit freedom when people's actions would harm themselves. The government can only limit freedom when people's actions would harm others. The government cannot limit freedoms of the citizens without forensic evidence. Study all 40 terms Study O Terms only Most philosophers believe that intentions are important when Judging the morality of an action, but for utilitarian the sole criterion is the action's consequences. True Which of the following expressions would you be most likely to hear utilitarian using to Justify their actions? The ends Justify the means. † Which of the following factors should be taken into consideration when performing Bantam's utilitarian calculus? The intensity of pleasure. 1 . In the early sass during times of revolution, rape, rampage, and chaos in certain areas of the world, the Roman Catholic Church hierarchy supplied its nuns with birth control pills. The reasoning was that, although the church opposed use of the Pill, the risk of rape and resultant pregnancy was so great as to override religious objections to the Pill.This Justification illustrates what sort of ethical system? Utilitarian Regarding the confinement raising of chickens for food, Jeremy Beneath would most likely argue that it is Not morally acceptable because chickens experience pain. According to utilitarianism individual happiness is the highest moral good. People achieve happiness by pursuing their rational self-interests. Therefore, people ought to pursue their rational self-interests. False Which of the following did Mill regard as our most important moral duty/right?Malefaction Suppose that an anti-abortionist assassinates an abortionist, claiming that, â€Å"The end justifies the means: It is better to kill one human now, than to allow that person to kill many humans (perform abortions) in the future. † This assassin's reasoning adheres to whic h ethical system. To a rule-utilitarian, we should in any particular situation, follow the rule that in mineral brings about the greatest happiness for the greatest number. Utilitarian would support voluntary euthanasia, especially when the pain in a person's life outweighs the pleasure that he or she derives from living.According to which ethical system does the rightness or wrongness of an act depend on the act itself and not on its consequences? Deontological system Ethnologist S. Book suggests that, although lying is generally wrong, there may be isolated cases where the duty to lie conflicts with the more important duty to protect innocent human life. In these cases, lying may be morally Justified. This view will lead to the notion of: Prima facie duties. The development of proper self-esteem (the duty of self-improvement) in Demonology requires that we: Cultivate the good will.Which of the following, according to Kant, is a characteristic of moral maxims and duties? They are u niversally binding. According to prima facie ethnologists, a moral duty is binding unless it: Conflicts with a more compelling moral duty. Dry. Jack Sovereign has assisted numerous people in committing suicide, each of whom felt that his or her life was no longer worth living because of disease, disability, r terminal illness. Which of the following people would be most likely to disapprove of Dry.Asseveration's actions? Emmanuel Kant The categorical imperative requires us to: Always treat persons as ends-in-themselves. Identify the philosopher who said: â€Å"so act as to treat humanity, whether in your own person or in that of any other, in every case as an end in itself, never as a means only. † Emmanuel Kant. â€Å"Act only on that maxim through which you can at the same time will that it should become a universal law,† is an ethical principle advocated by: Cant's demonologies. Week Assignment However, each company must access their unique situation and environment to determine if IT outsourcing is the method going forward. There can be immense fiscal and operational benefits, but also significant risks. Factors for Outsourcing The most obvious factor in whether or not to outsource is cost. Companies are driven by profits. If the cost of outsourcing ammonium's the Return on Investment (ROI) then it is unlikely executive management would consider the option. However, in today's environment companies like Amazon are able to achieve vast efficiencies by consolidating massive resources into a globalInfrastructure as a Service (alas) capability. Services like SAWS can establish thousands of virtual servers within an hour. All within Amazon's mature, secure, and stable environment Another factor for outsourcing is, in by doing so, allowing a company to focus on its core competency and not be burdened by IT requirements. Additionally, companies like SAWS provide robust, scalable, and leading edge capabilities that would be, for most, excessively burdensome to plan, implement, maintain, and operate. However, though SAWS can deliver organizational requirements to the majority of potential customers, some are more feasible than others.Big data companies which have massive analytics requirements need customized server configurations to attain deliverable efficiencies. Though Amazon and others have made strides in accomplishing just that, they cannot compete with a costly in-house implementation. Risks in Outsourcing Companies like Amazon have changed the thinking paradigm of risks associated with outsourcing IT. Not even 5-10 years ago companies were concerned with risks such as quality of services, reliable ¶y', and excessive dependency. Today the environment differs significantly. Companies sign up with Amazon in search of reliability.Quality of service is impeccable and Amazon institutes a fee for service marketing platform so companies only pay for what t hey use. However, there are other risks that cannot be overlooked. One of these key risks is security. Though Amazon likely has a healthy security posture, due to their immense success, has also become a key hacker target. Storing all company data to an external vendor must make management a little uneasy. Corporate intellectual property and the trust of a company's customers can be shaken by one significant breach. Is it worth the risk?Outsourcing Costs Services like Amazon have made it increasingly attractive to consider outsourcing with their fee for service model. In a server brutalized environment CHIP cores, memory, and storage is shared. SAWS only charges customers for what they use. In the contrary, in an in-house solution, the costs don't stop when operations do. There are reoccurring costs associated with power, facilities, support contracts, etc. All these costs vanish when utilizing an alas capability such as SAWS. Not to mention a reduction in staff as robust IT staff w ill no longer be required if there is minimal infrastructure to support.Implications of Outsourcing IT If the decision is made to outsource IT, it would alter the face of the organization business structure as whole groups may be removed. Internal IT operations impact almost every facet of an organization. Finance and HER need to support the additional IT staff and IT operational costs. Fewer individuals typically reduce liability risks associated with general operations. Security needs to be enforced in data centers and other highly sensitive IT infrastructure areas. The need for a CIO and/or COT would be somewhat reduced.Lastly, the need for an IT tier 3 and above staff could be potentially completely eliminated. Outsourcing IT would create a lean organization focused on its core competencies and more likely to attain that elusive competitive advantage in its marketplace. Outsourcing IT is here and it's here to stay. Companies will find it more and more difficult to be competitive in a market where your competitors are not burdened by IT requirements. Cost, efficiencies, and strategic vision are several of the many factors to consider with IT outsourcing. Week assignment Pornography degrades values that are held in high regard in a society. Pornography ought to be recognized as a form of free speech. And B B and C Question 8. 8. Which statement might be used to argue that pornography ought to be extensively regulated? (Points : 1) Pornography demonstrates realistic forms of sexual intercourse. Pornography provides enjoyment to millions of people. Pornography denigrates women. Pornography creates realistic perspectives about healthy relationships. None of the above Question 9. 9.Which statement might a libertarian most agree with? (Points : 1) The state should be responsible for the welfare of its citizens. The state should be allowed to restrict freedom whenever it deems it necessary to do so. Tate should restrict freedoms based on the greatest happiness of the citizens. The state should only be allowed to restrict behavior that harms others. None of the above Question 10. 10. John Stuart Mill would most agree with which statement? (Points : 1) The g overnment cannot limit freedoms of the citizens without circumstantial evidence.The government can only limit freedom when people's actions would harm themselves. The government can only limit freedom when people's actions would harm others. The government cannot limit freedoms of the citizens without forensic evidence. Study all 40 terms Study O Terms only Most philosophers believe that intentions are important when Judging the morality of an action, but for utilitarian the sole criterion is the action's consequences. True Which of the following expressions would you be most likely to hear utilitarian using to Justify their actions? The ends Justify the means. † Which of the following factors should be taken into consideration when performing Bantam's utilitarian calculus? The intensity of pleasure. 1 . In the early sass during times of revolution, rape, rampage, and chaos in certain areas of the world, the Roman Catholic Church hierarchy supplied its nuns with birth control pills. The reasoning was that, although the church opposed use of the Pill, the risk of rape and resultant pregnancy was so great as to override religious objections to the Pill.This Justification illustrates what sort of ethical system? Utilitarian Regarding the confinement raising of chickens for food, Jeremy Beneath would most likely argue that it is Not morally acceptable because chickens experience pain. According to utilitarianism individual happiness is the highest moral good. People achieve happiness by pursuing their rational self-interests. Therefore, people ought to pursue their rational self-interests. False Which of the following did Mill regard as our most important moral duty/right?Malefaction Suppose that an anti-abortionist assassinates an abortionist, claiming that, â€Å"The end justifies the means: It is better to kill one human now, than to allow that person to kill many humans (perform abortions) in the future. † This assassin's reasoning adheres to whic h ethical system. To a rule-utilitarian, we should in any particular situation, follow the rule that in mineral brings about the greatest happiness for the greatest number. Utilitarian would support voluntary euthanasia, especially when the pain in a person's life outweighs the pleasure that he or she derives from living.According to which ethical system does the rightness or wrongness of an act depend on the act itself and not on its consequences? Deontological system Ethnologist S. Book suggests that, although lying is generally wrong, there may be isolated cases where the duty to lie conflicts with the more important duty to protect innocent human life. In these cases, lying may be morally Justified. This view will lead to the notion of: Prima facie duties. The development of proper self-esteem (the duty of self-improvement) in Demonology requires that we: Cultivate the good will.Which of the following, according to Kant, is a characteristic of moral maxims and duties? They are u niversally binding. According to prima facie ethnologists, a moral duty is binding unless it: Conflicts with a more compelling moral duty. Dry. Jack Sovereign has assisted numerous people in committing suicide, each of whom felt that his or her life was no longer worth living because of disease, disability, r terminal illness. Which of the following people would be most likely to disapprove of Dry.Asseveration's actions? Emmanuel Kant The categorical imperative requires us to: Always treat persons as ends-in-themselves. Identify the philosopher who said: â€Å"so act as to treat humanity, whether in your own person or in that of any other, in every case as an end in itself, never as a means only. † Emmanuel Kant. â€Å"Act only on that maxim through which you can at the same time will that it should become a universal law,† is an ethical principle advocated by: Cant's demonologies.

Business Studies with Specialisms Essay

Discuss the characteristics of the scientific method which makes it superior over other methods as a means of obtaining new and reliable knowledge Introduction Marketing research has borrowed liberally from other disciplines; this is not surprising because research methodologies and techniques have application over many fields of study. Like other emerging disciplines, marketing research theory has been developed by creative adaptation rather than blind adoption. The extent to which marketing theory has been built on borrowed concepts was noted some years ago by the Marketing Science Institute of America. Historically, most sciences started by borrowing their conceptual approach and general theoretical ideas from other sciences. Joyce1 has observed that: Market research is not a practice or study isolated from other practices or studies. It has drawn freely from certain expert academic fields and will no doubt continue to do so. Further, market research organisations make use of people with expert, specialist training – especially from those fields known broadly as ‘the social sciences ‘ – both as staff members and consultants. It took a long while to determine how is the world better investigated. One way is to talk about it. For example: Aristotle, the Greek philosopher, stated that males and females have different number of teeth, without bothering to check; he then provided long arguments as to why this is the way things ought to be. This method is unreliable: to determine whether a statement is correct it requires evidence. Debating over a subject or putting an argument forward does not qualify as proof. Consideration of the history of research methods requires a look at the history of science. What is Science? A basic question asked by many and answered in almost as many ways. Early roots of science begin with Plato (427-347 B.C.) and his search for everlasting truth and reality. James Randi2 defines science as: ‘a careful, disciplined, logical search for knowledge about any and all aspects of the universe, obtained by examination of the best available evidence. What’s left is magic. And it doesn’t work.’ We can define science as a methodical approach to the acquisition of knowledge. This important word distinguishes how a scientist works from how people learn about the world. Ross Koning3 has some personal observations: ‘Creation must have occurred because life was not always here. Science is merely saying creation was not sudden and is still on-going. Science does not deny existence of God, God just cannot be tested scientifically. Scientists are commonly very religious. Science is the acquisition of truth.’ Modern science is an amazing phenomenon, and curiosity of how it works will continue to occupy people’s minds. The Scientific Method On a broad level, science is a methodology for attaining knowledge, where knowledge is a form of belief distinct from mere opinion or uninformed guesswork. Science is not the knowledge gained through the approach; hence, knowledge can be gained through a variety of ways. Science seeks out better ways of representing our experiences. The experiences and their representation in a system of beliefs are termed, respectively, observation and theory. Recognizing that personal and cultural beliefs influence both our perceptions and our interpretations of natural phenomena, the aim is through the use of standard procedures and criteria to minimize those influences when developing a theory. A better approach is to do experiments and perform careful observations. The results of this approach are universal in the sense that they can be reproduced by any skeptic. It is from these ideas that the scientific method was developed. What is the â€Å"scientific method†? The scientific method is the best way yet discovered for scrutinizing the truth from lies and delusion. It is based upon evidence rather than belief. This distinguishes science from faith. The scientific method revolves around the following key steps: 1. Observe some aspect of the universe 2. Invent a tentative description, called a hypothesis, that is consistent with what you have observed 3. Use the hypothesis to predict the existence of other phenomena, or to predict quantitatively the results of new observations 4. Perform experimental tests of the predictions and modify hypothesis 5. Return to step 3 to ensure of no discrepancies between theory and experiment. The scientific method is founded upon direct observation of the world around us. A scientist looks critically and attempts to avoid all sources of bias in this observation. But more than looking, a scientist measures to quantify the observations; this helps in avoiding bias. Which of these lines is longer? The both lines are the same length, though human bias might generate belief that one is longer than the other. The scientific method attempts to minimize the influence of bias or prejudice in the experiment when testing a hypothesis or a theory. The next part of the scientific method is to form a hypothesis. This is merely an educated guess. You examine the literature on the subject and gather as much knowledge from books as possible to begin to arrive at an answer. This tentative answer†¦this best educated guess†¦is your hypothesis. There is one important aspect to the hypothesis. It must be rejectable. There must be a way to test the possible answer to try to make it fail. If you design an untestable hypothesis, then science cannot be used to help you decide if it is right or not. For example: you hypothesis that ‘God is awake’. There is no way to test your hypothesis scientifically; therefore, there is no way to make it fail. If the experiments bear out the hypothesis it may come to be regarded as a theory, which then provides rational statements that explain a phenomena. This theory produces explanations to observations and predictions are made. To a scientist a theory is a conceptual framework that explains existing observations and predicts new ones. On the other hand, if the experiments do not bear out the hypothesis, it must be rejected or modified. Prediction is a way to put the hypothesis to a test. The prediction has three parts: 1. If my hypothesis is true†¦ 2. Then_____ should happen 3. When_____ is manipulated The manipulation is what you knew would likely falsify your hypothesis. If this prediction holds then you will not be able to reject your hypothesis. If this prediction does not hold then you will reject your hypothesis. The scientific method requires that an hypothesis be ruled out or modified if its predictions are clearly and repeatedly incompatible with experiment tests. In every experimental science, ‘experiment is supreme’ and experimental verification of hypothetical predictions is absolutely necessary. Experiments may test the theory directly or may test for consequences derived from the theory using mathematics and logic. The necessity of experiment also implies that a theory must be testable. Theories which cannot be tested, because, for instance, they have no observable ramifications, do not qualify as scientific theories. One of the key factors of scientific method is that the theory must be falsifable. Sir Karl Popper (1902-1994): Falsificationism (1993) Demarcation Criteria: Science is divided from psuedo-science or â€Å"myth† by making statements which are potentially falsifiable. When a hypothesis passes the test it is adopted as a theory it correctly explains a range of phenomena it can, at any time, be falsified by new experimental evidence. When exploring a new set or phenomena scientists do use existing theories, however, it is always kept in mind that the old theories might fail to explain the new experiments and observations. In this case new hypotheses are devised and tested until a new theory emerges. A theory is accepted not based on the prestige or convincing powers of the proponent, but on the results obtained through observations and experiments which anyone can reproduce. Most experiments and observations are repeated many times. If the original claims are not verified the process returns to the origin of such discrepancies. Epistemology is the branch of philosophy that studies knowledge. It attempts to answer the basic question: what distinguishes true (adequate) knowledge from false (inadequate) knowledge? Practically, this question translates into issues if scientific methodology: how can one develop theories or models that are better than competing theories? It is possible to construct a useful and reliable model for understanding scientific reasoning, known as the â€Å"Hypothetico-Deductive† model. The heart of the â€Å"Hypothetico-Deductive† model is deductive reasoning (induction plays a role primarily in generating laws about observations that are then deduced from theory, such as the law of multiple proportions). According to the H-D model, hypotheses and theories are sets of general principles that are said to explain and predict observable results. A theory is successful insofar as observable consequences can be deduced from those general principles and statements. When a positive instance of a predicted observation occurs, it is said to confirm that theory. Deductive and Inductive Thinking In logic, two broad methods of reasoning are referred to: the deductive and inductive approaches. Deductive reasoning works from the more general to the more specific. Sometimes this is informally called a ‘top-down’ approach. The process may begin with thinking up a theory about our topic of interest. We then narrow that down into more specific hypotheses that we can test. We narrow down even further when we collect observations to address the hypotheses. This ultimately leads us to be able to test the hypotheses with specific data – a confirmation (or not) of our original theories. Inductive reasoning works the other way, moving from specific observations to broader generalizations and theories. Informally, it is often known as a â€Å"bottom-up† approach. In inductive reasoning, the process begins with specific observations and measures, then patterns and regularities are detected, formulating some tentative hypotheses that we can explore, and finally end up developing some general conclusions or theories. Inductive reasoning, by its very nature, is more open-ended and exploratory, especially at the beginning. Deductive reasoning is narrower in nature and is concerned with testing or confirming hypotheses. Even though a particular study may look like it’s purely deductive (e.g., an experiment designed to test the hypothesized effects of some treatment on some outcome), most social research involves both inductive and deductive reasoning processes at some time in the project. The two graphs above can be assembled into a single circular one that continually cycles from theories down to observations and back up to theories. Even in the most constrained experiment, the researchers may observe patterns in the data that lead them to develop new theories. Comparison of Properties Deduction 1. In a valid deductive argument, all of the content of the conclusion is present, at least implicitly, in the premises. Deduction is nonampliative 2. If the premises are true, the conclusion must be true. Valid deduction is necessarily truth preserving. 3. If new premises are added to a valid deductive argument (and none of its premises are changed or deleted) the argument remains valid. Deduction is erosion-proof. 4. Deductive validity is an all-or-nothing matter; validity does not come in degrees. An argument is totally valid, or it is invalid Induction 1. Induction is ampliative. The conclusion of an inductive argument has content that goes beyond the content of its premises. 2. A correct inductive argument may have true premises and a false conclusion. Induction is not necessarily truth preserving. 3. New premises may completely undermine a strong inductive argument. Induction is not erosion-proof. 4. Inductive arguments come in different degrees of strength. In some inductions the premises support the conclusions more strongly than in others. Source: Introduction to the Philosophy of Science. Merilee H. Salmon, John Earman, Clark Glymour, James G. Lennox, Peter Machamer, J.E. McGuire, John D. Norton, Wesley C. Salmon, and Kenneth H. Schaffner. Englewood Cliffs: Prentice Hall, 1992. Available: http://dharma-haven.org/science/myth-of-scientific-method.htm Non-Scientific Sources 1. Common Sense People often refer to their knowledge and skills as common sense. It is good sense in everyday affairs. For example: The old farmer didn’t have much education but had always gotten along on a lot of common sense. He is hopeful that in the event of another war the world powers may summon enough common sense to avoid mass atomic destruction. Having a practical intelligence in different situations can derive knowledge that is of immense value. This practical intelligence has been gained naturally from the individual’s experience throughout their life and cannot be applied to any education or training. The experiences that an individual has been through during their life may affect their ability to produce unbiased knowledge. 2. Trial and Error Trial and Error is a method of learning by trying out different responses to a new situation until one response is successful. The desired result is then played on for future use and noted by the researcher. It can be quite a time consuming activity, however, similar problems in the future may benefit from the experiment. 3. Tenacity Tenacity is the determination to continue what you are doing. It means that the knowledge derived from previous studies must be recognised as it holds true value for a long period of time. 4. Intuition Intuition is a psychological and philosophical term which designates the process of immediate apprehension or perception of an actual fact, being or relation between two terms and its results. As an element of educational method intuition means the grasp of knowledge by concrete, experimental or intellectual, ways of apprehension. The importance of intuition as a process and element of knowledge is easily seen if we observe that it is intuition which furnishes us with the first experimental data as well as with the primary concepts and the fundamental judgements or principles which are the primitive elements and the foundation of every speculation. 5. Authority An expert provides knowledge on a particular subject, whereby subordinates accept the idea or concept as a respected source of knowledge. 6. Rationalism Rationalism is a philosophical movement which attempts to study the universe using reason, in the form of deductive and mathematical methods, rather than sense experience. Descartes, for example, tried to deduce what God’s world is like from the axioms of divine existence and goodness. When sourcing knowledge rationalism can be misleading when it is used alone, however, improving the accuracy of the principles associated with the subject will result in better sourcing. 7. Empiricism Any view which bases our knowledge, or the materials from which it is constructed, on experience through the traditional five senses. It is opposed to rationalism and denies that we have any a priori knowledge or innate ideas: we owe all our concepts to experience of the world. A priori knowledge is any kind of knowledge that is in no way derived from sense experience, observation or experiment. What might be called the classical empiricist view is associated especially with Locke, the first of the so-called British Empiricists, and his successors Berkeley and Hume. Empiricism has its roots in the idea that all we can know about the world is what the world cares to tell us; we must observe it neutrally and dispassionately, and any attempt on our part to mould or interfere with the process of receiving this information can only lead to distortion and arbitrary imaging. Conclusion The scientific method is intricately associated with science, the process of human inquiry that pervades the modern era on many levels. While the method appears simple and logical in description, there is perhaps no more complex question than that of knowing how we come to know things. In comparison with the non-scientific sources the emphasis here is that the scientific method distinguishes science from other forms of explanation because of its requirements of systematic experimentation. We use specific methods because they are objective, public and can give repeatable results. The question of how science is so successful at improving understanding is hardly every presented as a question at all. No matter what happens, you will learn something. Science is not only about getting ‘the answer’. Scientists who study extremely complex problems can spend a lifetime and not find ‘the answer’. Even so, their results may eventually play a part in completing the full picture of understanding. Animal and children may learn about whatever they pay attention to, and so do scientists.

Barriers To Communication

Barriers To Communication For any kind of communication to be successful, it is essential that the receiver attributes the same meaning to the message as intended by the sender of the message. But all acts of communication are not perfect or successful. At times, some meaning is lost as the message encounters various barriers along its passage between the sender and the receiver. Such barriers may arise at any of the stages through which a message passes during the process of communication. This is also called miscommunication. Some of the common problems that lead to the failure of communication are: noise, cultural differences, complexity of subject matter, personal biases, semantic problems, socio-psychological barriers, filtering, information overload, poor retention, poor listening, goal conflicts, slanting, inferring, etc. Barriers to communication can be classified as follows on the basis of the stage of the communication process during which the problem/s arise: a. Sender-oriented barriers: lack of p lanning, lack of clarity about the purpose of communication, improper choice of words resulting in a badly encoded message, difference in perception, wrong choice of the channel, unjustified presumptions, etc. b. Receiver-oriented barriers: poor listening, lack of interest, difference in perception, biased attitude, etc. c. Channel-oriented barriers: noise, wrong selection of medium, technical defects in the address system or the medium of communication chosen by the sender, time and distance, etc. We may define communication as a psycho-semantic process. Therefore, the barriers that affect the effectiveness of communication are mostly of social-psychological-linguistic nature. These factors may act upon any or all of the elements of the process of communication, that is, the sender or the receiver or the channel. And a common barrier for both the sender and receiver can be the absence of a common frame of reference which often leads to the breakdown of communication in a specific s ituation. A common frame of reference is the context in which communication takes place. A well-defined context helps the sender and the receiver to comprehend the content of the message in a similar way, with regard to its implications and meaning. Many of the barriers listed above are easy to understand. But a few of them may require a detailed explanation. DIFFERENT TYPES OF BARRIERS The various barriers to communication can be classified into the following broad categories: 1) Semantic or language barriers, 2) Physical barriers, 3) Personal barriers, 4) Emotional or perceptional barriers, 5) Socio-psychological barriers, 6) Cultural barriers, and 7) Organizational barriers. SEMANTIC/LANGUAGE BARRIERS Semantics is the systematic study of the meaning of words. Thus, the semantic barriers are barriers related to language. Such barriers are problems that arise during the process of encoding and/or decoding the message into words and ideas respectively. Both the oral and the written communication are based on words/symbols which are ambiguous in nature. Words/ symbols may be used in several ways and may have several meanings. Unless the receiver knows the context, he may interpret the word/symbol according to his own level of understanding and may thus misinterpret the message. The most common semantic barriers are listed as under:

Report about Plagiarism is one form of academic dishonesty, although Essay

Report about Plagiarism is one form of academic dishonesty, although it cannot be assumed that all plagiarism occurs merely because a student is aiming to cheat. Discuss - Essay Example It is basically copying and pasting ideas from an original work of another person.Murdoch University (2004) defines plagiarism as: Plagiarism constitutes using the work of another without indicating by referencing (and by quotation marks when exact phrases and passages are borrowed) that the ideas expressed are not their own. †¦ Plagiarism and collusion apply to work in any medium (for example, written or audio text, film production, computer programs, etc.) (p. 20). Most universities tend to believe that students plagiarise simply because they want to cheat, however an analysis of a qualitative study done on 12 students revealed that there are other factors that influence a student in plagiarising. Such factors range from poor academic skills, self esteem to social and cultural factors. Research findings from other parts of the world are also comparing positively with these research findings and these findings can go along in generating ideas for universities to look into in solving this issue. Several studies all over the world have been conducted to find out what influences students to commit plagiarism. Initial researches have often used the assumption that plagiarism as a form of cheating is done deliberately by students for selfish gain however recently other research institutions have deviated from this assumption to other qualitative views that propels students to plagiarise (MurdochUniversity, 2004). Certain factors associated with education such as academic skills, social pressures, cultural pressures have also been found to contribute to plagiarism without the student necessarily intending. Although in most universities plagiarism is often equated with cheating. Cheating such as taking notes to an exam room, lying so as to get consideration and intentionally coming up with a fake bibliography is more intentional than plagiarism therefore plagiarism should be given a different approach in order to

CLUB IT Essay Example | Topics and Well Written Essays - 750 words

CLUB IT - Essay Example y’s mission will be not only to build a community of muslc lovers by hosting community events, promoting diverse local talent and building and online community and presence. The success of this new mission depends primarily on two related but distinct competitive business strategies: Innovation and differentiation. Ruby’s will differentiate itself from its competition through its focus on three specific musical genres, community building, and live, local music. To do this, it will utilize innovative IT strategies that set it apart before clients even set foot in the club. The new menu at Ruby’s will also reflect this focus , with an emphasis on soul food and Latin dishes, while sticking to a limited, finger-food based selection. The drink menu will be updated with Latin drinks such as mojitos and sangria, while also introducing six popular microbrews and a selection of red and white wine popular with our target clientele demographic. Internet: A major upgrade to the business website is the centerpiece of Ruby’s new competitive strategy. First, the owners have designed a new logo for the new business name, and set up a template for a new website. Look: A video tour and still photos of the newly renovated interior of the club focuses on the dramatic new details and space, however because of our new strategy of emphasizing localness, dancing and community, both the video and still photos of the interior include smiling, happy patrons sipping our distinctive Latin cocktails, wine or foaming microbrews. The new clickable menu includes images of tapas-style appetizers emphasizing Latin and soul themes. Features and Functions: New features and functions of the website emphasize community and local music even before clients enter the venue. First, a detailed calendar includes both live performances and community events with external links to performers’ websites and those of community organizations and business who will host their vents at Ruby’s.

Strategic Management Essay Example | Topics and Well Written Essays - 1500 words

Strategic Management - Essay Example Why is it this so? It is clear that the globalization of markets has led to a paradigm shift in how organizations-and especially multinationals-conduct their business operations. The deregulation of national and regional markets has led to eradication of bottlenecks to cross border trade leading to increased competition for the vast and diverse, global markets. Porter’s competitive model was build based on the prevailing economic conditions of the eighties. It assumed the classical perfect market conditions of intense competition and a relatively stable market structure that is subject to cyclical developments. Therefore, by design, this model loses significance in the modern global market. Modern global business is characterized by dynamic markets where industries have complex and multiple relations and product groups (Have, 2003). The upsurge of internet technology and e-business platforms has meant that the effectiveness of the model is in providing a still image of the ind ustry. This is as opposed to providing holistic projections of future trends and developments that can be ably translate into strategy for the particular market segment. The model assumes the idea of competition based on a need for profitability and market survival only loses relevance in modern markets. It wrongly approaches some of the five factors i.e. suppliers and customers as a threat to the organization that needs to be addressed. Modern economics postulate that business strategies should be focused in incorporating, as opposed to reacting to these particular factors (Miles, 2011). The Boston Consulting Group (BCG) matrix was developed with a focus on the efficient allocation of resources within business enterprises. It adopts an evaluative criteria based on two prime factors i.e. market share and market growth has been widely used as a tool for portfolio planning, marketing and business strategy development. The basic principle in risk management is in diversification of ass ets through portfolio investments. The BCG model provides a useful pictorial comparison of the firm and its products versus the leading competitor and its products in the same market. The model, therefore, becomes a critical tool for implementing a firm’s short to medium-term profitability and growth objectives by providing forecast solutions of the market as it is now and as expected in the near future. In the short-run, the model is capable of providing strategies that are designed to provide quick-fix solutions to a firm. The disposal and optimization of loss making assets or ventures can be easily identified using this model. On the down side, the model, the model’s application is often limited to a scope of a year. The model lacks the ability to provide a long-term picture of the market conditions and thus strategy development towards achieving the firm’s overall long-term goals becomes very challenging. The BCG assumes a direct relationship between market shares, seems irrelevant in the current global market. There are small businesses in the small market segments especially within the information technology segment that have surpassed even the largest multinational corporations in profitability (Kaplan & Norton, 2000). The model also places an inaccurate reliance in market growth as a dominant factor in determine the attractiveness of a market segment. There are other factors such as aggregate market risk and regulation that equally influence

English Essay Example | Topics and Well Written Essays - 500 words - 69

English - Essay Example The freedom to speech and communication is a universally accepted provision within the modern day confines of democracy though the government and other oversight bodies are charged with the mandate to regulate the limits to this freedom. The government or the other regulatory bodies have the capacity to enforce regulation prohibiting publication of a piece of literary work such as a poem, thematic play or any personal declared piece of information upon establishing that the information being conveyed is detrimental to a country’s or institutions welfare and this define censorship. Nevertheless, there exists varying opinions between people in favor for or against censorship as supported by individual experience or perception of the same. I highly appreciate the government’s role in controlling and managing the freedom of expression as is provided for within our constitution. However, I highly disregard her role to censor the public for selfish gains or order to condone practices that are against ethics and morality as it happened through my own experience. My theatre group happened to be shortlisted the best student in provincial drama festivals in the category of High school competitions back in the year 2010. We had presentation of a play that had the theme of the deep rootedness of corruption within the governance structure of a hypothetical country though in real sense that was a direct representation of our country. The event that had lead to the script write choice of the theme had been a just recently concluded election where one ethnic community (and which had previously made the better part of the government) won the presidency as well as the majority representation in the national assembly. Through the play, we captured how this community and politics had shaped the institutions of the country to be more or less a communal structure and had over two-thirds of all-powerful

Scientific laws do not describe true facts bout reality Essay - 1

Scientific laws do not describe true facts bout reality - Essay Example These assumptions and estimates date back since the invention of science. Many scientists have come up theories and assumptions which have also find their way into scholarly books. This boosts the continuity of the theories generation after generation. Scientific laws are viewed as the reason as to why the globe is evolving in to a new planet of inventions. However, questions are asked as to whether these laws are real or just what are forced to believe. According to Cullen as much as there are errors involved in coming up with scientific theories, people tend to completely believe scientific inventions (67). The essay will provide insight as to why scientific laws do not describe true facts about reality. Scientific laws include the application of many formulae. As is it proven no human being can be 100 percent efficient and accurate. As scientist come up come with these formulae there is an obvious assumption that some errors and estimates are included in the invention of scientific laws. The estimates and errors are evidence that the assumptions displayed by scientific laws mat not provide the accurate facts about reality. According to Godfrey-Smith if a theory or law is based on assumptions there is always a probability that the law cannot be completely accurate (102). If the laws were based on facts rather than scientific assumptions, it would be logic to argue on the fact that scientists are accurate in their findings (Hempel, 211). In an argument by Rosenberg he argues that scientific explanation is casual explanation (94). There is not much evidence of formal or completely proven explanations. Science only tries to explain already existing phenomena with laws invented from results. It is for this reason that it becomes evident that any formula can be applied to come up with known result. This case can be compared to a person given an answer to arithmetic then asked to come up with a formula. This becomes easy as any

Journal #6 Essay Example | Topics and Well Written Essays - 500 words

Journal #6 - Essay Example I resolved to create my own time to be doing this so as not to interfere with other plans of the day. My resolve was to be waking up at 4.00 am every day instead of 5.00. Within that time, my scores improved tremendously. However, after two terms, I grew weary and got bored and slowly by slowly let go of the good practice. I am now back to the average student that I was. This was mainly caused by laziness and the spirit of giving up quickly and it may have a negative impact to my future prospects. If I improve on it, I am sure I can proper to the highest level within my fields of interest. One of my self-defeating thought patterns is that that I always think that I will never make it to the best footballer I once dreamed I will be. With such a noble dream in mind, I keep trying my best in the field; do extra drills than my other team members, watch stars play and try to forge an identity with them, but something always tells me that this is all in vain. Although an average player, I know that if I work hard I can emerge the star that I always dream to be. However, these noble thoughts are always shattered away by this disheartening thought that always reminds me of my failing destiny. Whenever this thought comes, I find myself not doing my best. I once lost a clean penalty kick that would determine whether our team wins or not when this thought emerged in my mind at that time. Such feelings come about to the ease with which I relent. I feel that I will be always a loser if such feelings keep coming to me. However, I am bound to improve and come out as a successful per son if I work hard to overcome

Distance Learning and Brick-and-Mortar Learning Coursework

Distance Learning and Brick-and-Mortar Learning - Coursework Example by their professors with virtually no availability of visual and auditory media for facilitating the students wilt latest technology-based learning opportunities most of the times. This remains a reality that in a more traditional brick-and-mortar classroom type of learning, students remain oblivious to the amazing freedom of surfing on their own for gathering useful academic information which is based on latest research and offers more up-to-date knowledge which differs hugely with the more conventional academic theories pursued by the professors since ages in the brick-mortar classroom learning. I, on my part, cannot deny the fact that had I not engrossed myself in online learning so as to continue my educational journey in a country like Afghanistan, I would never have acknowledged the myriad benefits of online learning like developing the amazing ability to search answers to complex academic questions on my own without any supervision. Coming to the resembling features between on line learning and brick-and-mortar learning, it is worth mentioning that the process of submitting academic assignments remains pretty much the same in both modes of learning. This is because the students have to mail their assignments to their professors so that they could be evaluated and analyzed by them, thus ruling out the factor that most of the students still have to line up for having their projects assessed by their professors in the traditional classrooms. The process of submitting assignments thus remains the same between an online education college and a traditional brick-and-mortar classroom. Secondly, though people can be educated and acquire a professional degree both through traditional colleges and online learning colleges these days, still absence of a traditional... From this paper it is clear that  distance learning like involving oneself in an online education program saves one from relying excessively and unnecessarily on the professors for getting answers to certain academic problems. On the other hand, online learning process provides the students with the commendable facility of developing a broader academic vision especially when they start searching for latest information available online which relates to their queries. Research studies identify as to how online learning â€Å"might contribute to desired learning outcomes like critical thinking, taking ownership of learning, forming essential questions, collegiality, and the like†.According to the research findings  the factor of collegiality is enhanced by engaging in an online learning course when students are explicitly united for a common purpose like an academic purpose on a useful online forum like Twitter, Facebook, and other social networking sites for resolving certai n complex problems and discussing answers to them after resolving on one most credible answer.  Independence, self-motivation, and learning via visual media are the three most important benefits offered by online learning process, as identified by in comparison to traditional style learning. While traditional courses are offered to the students via reading the written text, online courses employ the facility of visual learning medium like delivering course through high-definition pictures and videos.

High school Essay Example for Free

High school Essay Tamil Nadu is regarded to be one of India’s star performers in the sector of elementary education. The results of the 2001 Census show that Tamil Nadu has attained third position behind Kerala and Maharashtra both in terms of overall and female literacy. It recorded close to 100 per cent gross enrolment ratio (GER) at primary and upper primary levels based on 2007 estimates. A major legislative effort for the universalisation of education in line with the constitutional mandate has been the introduction of the Tamil Nadu Compulsory Education Act, 1994. Under this Act it is the duty of the government to provide the necessary infrastructure (schools and teachers) for ensuring universalisation of elementary education. Parents are also liable to be fined if they do not send their wards to school, though this rule is not very strictly enforced as most of the children not going to school come from poor backgrounds. Tamil Nadu’s high enrolment statistics are also the result of the number of welfare schemes that the State government has introduced in the elementary education sector. The large number of missionary and private schools are also playing a role in the spread of education. The government provides textbooks, uniforms and noon meals to the pupils making it a State where the per child spending is much higher than in educationally backward States such as Bihar, Assam, Andhra Pradesh, Rajasthan and others and is higher than the all-India average. The State is making an endeavor to provide primary schools within a one km radius of human habitations with a population of 300 and above to increase their accessibility. It is also a State that has actually spent most of the funds allocated to it by the Centre under the SSA scheme, in contrast to States like UP, Bihar and Assam that have huge unspent amounts. Tamil Nadu students stood first in the country in mathematics, language and reading comprehension skills according to the national mid-term achievement survey of Class III children commissioned by the NCERT in collaboration with the MHRD and the SCERT and SSA wings of the States recently. But it has come to light that local bodies like corporations and municipalities are not fully utilizing money collected as education tax as a percentage of property tax under the Tamil Nadu Elementary Education Act and this is affecting the quality and quantity of formal education provision at the grassroots level. While the general literacy rate in Tamil Nadu as per 2001 data is 73. 5%, wide disparities exist across districts, gender, and area of residence as well as social grouping. The literacy rate of the SC and ST populations are consistently lower in all the districts. The retention rate within and after the primary school level is also not very impressive and there is a high percentage of repeaters. This is particularly so in the case of the STs and SCs. It is to overcome this discrepancy between education offered in different kinds of schools, between rural and urban schools and to overcome other numerous ills that have crept into the education system—such as arbitrary collection of fees, induction of daily waged, inadequately qualified para teachers, rote learning, examination stress, problems related to the medium of instruction and so on—that the State government constituted the Muthukumaran Committee, which submitted its report in 2007. This committee had the mandate to work out a framework of a uniform pattern of education in Tamil Nadu and to make recommendations for improving its quality. The report of the Committee recommends only one autonomous board, The Tamil Nadu State Secondary School Education Board, instead of the existing four State level boards—Matriculation, Anglo-Indian, Oriental and State Board. Schools coming under this integrated Board would follow a common syllabus ensuring an equitable school education in the State not conferring any undue advantages with regard to admission into higher educational institutions for students completing their school education from one particular Board. Equitable standard education is to be provided by a Common School or Neighbourhood School system, which with uniform syllabi would help to ‘decommercialise’ educational institutions and put an end to many a private management that does not feel sufficiently accountable to society in this crucial sector. The spiraling cost of education starting at the nursery level is cementing caste-class and rural-urban divisions. A common school system using the mother tongue as a medium of instruction would make equal education accessible to all without discrimination. A common school system also means a common examination pattern. The report of the Committee advocates a reasonable teacher-student ratio of not more than 1:30 and doing away with faulty textbooks and a system of rote learning. It emphasizes the promotion of analytical and rational skills that would equip the students to learn by themselves; a testing and evaluation pattern that involves the application of concepts learnt rather than mere reproduction of facts. The school syllabus should not overload students with information but instead kindle their interest in the subject and teach them how to search for more information and conceptualize it. Traditional knowledge should be incorporated and made part of school education. Evaluation should be comprehensive and not just of academic achievements, and that too only marks based. Evaluation should include an assessment of student abilities and performance in academics, the arts, sports and games, values, reading habits, character, conduct and other extra-curricular activities. Schools should not only lay emphasis on academic subjects but also on moral education. Here the Committee suggests that it may be better to have a progress book with entries made from time to time and also periodically sent to the parents so that they may be made aware of their child’s progress. Regular consultation with parents about their wards’ progress and achievements and educational goals is a must. A sheet of paper containing marks obtained in public exams is not enough to understand a student’s development and potential. If the marks obtained in only one exam are going to decide the person’s admission into an institute of higher learning then all stress is on preparing for this exam neglecting other exams and activities. The chance or temptation to indulge in malpractices is also high. Marks obtained in a one-time exam also are no accurate reflection of the student’s actual knowledge and achievement level and potential. Treating exams and marks as more important than life itself has meant the death of many a student. Finally, children belonging to linguistic minorities should be allowed to gain instruction in their respective mother tongue, while all students in standards 5 or 8 ought to have a specific level of knowledge in Tamil and English so that these languages can be used for communication. No student should be dropped and he/she should be allowed to grow in the chosen field of interest and in accordance with their individual capability. A simple pass or fail should certainly not be a deciding factor in a person’s life. While the government has accepted the notion of one board for school education other major recommendations of the Muthukumaran Committee on education reforms are being sidelined by the State government. In fact, some government run schools are changing the medium of instruction to English and not all schools teach Tamil, though this is compulsory as per current State education law. Moreover, schools with an eye on the results in board exams and aiming at future lucrative career possibilities for their students are introducing modern European languages like French (German is waiting to be introduced on a larger scale on the school level) that are supposedly high scoring subjects in comparison to Tamil, which is seen to be difficult even by those whose mother tongue it is. There is almost everywhere an exodus from government run schools to aided or private schools because of the perceived better quality and the lure of an English medium education, which is regarded by parents to be necessary in today’s world. It is to remain viable and not lose out in this competition for students that government run schools are increasingly offering English medium instruction also, although the English medium sections are permitted only on a self-financing basis. The non-acceptance of important recommendations by the Muthukumaran committee is thus in line with the general pro-globalisation trend in the Tamil Nadu economy as a whole. Current education system Why is India still a developing country and what is stopping it from being a developed country? India’s education system as a stumbling block towards its objectives of achieving inclusive growth. India is going to experience a paradox of nearly 90 million people joining the workforce but most of them will lack requiste skills and the mindset for productiveemployment according to a report in DNA. India has about 550 million people under the age of 25 years out of which only 11% are enrolled in tertiary institutions compared to the world average of 23%. . I will be focussing on how the education system’s failure is leading to another social issue of income inequality and hence, suggest certain policies to improve India’s education system and reduce inequality. Problems and drawbacks The really critical aspect of Indian public education system is its low quality. The actual quantity of schooling that children experience and the quality of teaching they receive are extremely insufficient ingovernment schools. A common feature in all government schools is the poor quality of education, with weak infrastructure and inadequate pedagogic attention. What the government is not realising right now is that education which is a source of human capital can create wide income inequalities. It will be surprising to see how income inequalities are created within the same group of educated peopleSo if the government does not improve education system particularly in rural areas the rich will become richer and the poor will get poorer. Hence, it is imperative for the government to correct the blemishes in India’s education system which will also be a step towards reducing income inequality. Another reason for poor quality of education is the poor quality of teachers in government schools . Government schools are unable to attract good quality teachers due to inadequate teaching facilities and low salaries. The government currently spends only 3% of its GDP on education which is inadequate and insufficient. To improve the quality of education , the government needs to spend more money from its coffers on education. Most economists feel that the only panacea to the ills of the public schooling system is the voucher scheme. Under the voucher system, parents are allowed to choose a school for their children and they get full or partial reimbursement for the expenses from the government. But however, the voucher system will further aggravate the problem of poor quality of education in government schools. Such a system will shift resources from government schools to private schools. This will worsen the situation of government schools which are already under-funded. Moreover, if the same amount given as vouchers can be used to build infrastructure in schools then the government can realize economies of scale. For example- The centre for civil society is providing vouchers worth Rs 4000 per annum to 308 girls. This means that the total amount of money given as vouchers is Rs 1232000. If the same amount can be used to construct a school and employ high quality teachers who are paid well then a larger section of the society will enjoy the benefit of education. A school can definitely accommodate a minimum of 1000 students. I hope government takes certain appropriate policy measures to improve the education system otherwise inequalities are going to be widespread and India’s basic capabilities will remain stunted. Let us strengthen the case for a stronger education system. Conclusion Certain policy measures need to be taken by the government. The basic thrust of government education spending today must surely be to ensure that all children have access to government schools and to raise the quality of education in those schools. One of the ways in which the problem of poor quality of education can be tackled is through common schooling. This essentially means sharing of resources between private and public schools. Shift system is one of the ways through which common schooling can be achieved. The private school can use the resources during the first half of the day and the government school can use it during the second half. It is important to remember that the quality of education is directly linked to the resources available and it is important for the government to improve resource allocation to bring about qualitative changes in the field of education. Common schooling is one of the ways in which government can use limited resources in an efficient way and thus improve resource allocation.

Evaluating The Spawning Techniques For Bivalves

Evaluating The Spawning Techniques For Bivalves Control of reproduction is a prerequisite in modern bivalves aquculture industries due to unreliable quantity and quality of natural spat as well as market demand on standardized products. Spawning is one critical step in bivalves hatchery, together with fertilization and larval rearing, thus a lot of research has been done to explore prospective methods and understand the process within. Various means in spawning techniques are presented herein, i.e. gamete stripping and spawning induction by chemical or physical stimulants. Where relevant, advantage and disadvantage of each technique are discussed and compared. Introduction Bivalves are aquatic animals belong to the phylum Mollusca which characterized by two calcareous shells covering a soft body, encompassingboth marine and fresh-water species both marine and fresh-water species. Some well-known bivalves, such as clams, scallop, mussels, and oysters; has been successfully cultured since decades or centuries ago (Nash, 2011). Nowadays, bivalves and other members of molluscs accounts for nearly 30% of aquaculture production with volume more than 50 million tonnes in 2006 (FAO, 2008). Intensive production is needed to meet market demands on edible and high value bivalves (pearl oysters). One important key of intensification is control over all of the production steps, including management of reproduction which will lead to higher productivity with lower cost in order to reach best efficiencies and standardized products. Controlled spawning of molluscs is the best way to obtain reliable supply of quality seeds and reduce dependencies upon unreliable natural spawning events to collect spat. The development of bivalves hatchery was started in 1879 when William Brooks demonstrated that oyster eggs could be spawned and developed into the larval stage in laboratory (Castagna, 1983). No published report on artificial propagation of bivalve molluscs until 1920s when William Wells successfully reared oyster larvae. These two findings provide important data for further development in molluscan aquaculture. This article will describe a number of common spawning techniques for bivalves, which divided into 2 categories: gamete stripping and spawning induction. Henceforward, gamete stripping is considered not induction since the word induction refers to a persuading or stimulating action, whereas another authors may define the other way. Advantage and disadvantage considerations of each technique are included, particularly in relevance with practical farming aspects. 1. Gamete Stripping As the name indicates, this procedure involves removal of gamete from gonad tissue. Briefly, fully ripe gonad overlies the digestive tract was slash repeatedly with scalpel and washed with filtered seawater to harvest the gametes. Microscopy examination is needed to determine sex and appearance of the ova and sperms. Therefore, only well-trained operators can carry it out because of high level of difficulties. Due to its effectiveness, gamete stripping has been widely used to obtain gametes in many Bivalvia species. Pacific oysters (Suquet et al., 2007), pearl oysters Pinctada fucata (Alagarswami et al., 1983a), and European flat oysters Crassostrea gigas (Shpigel, 1989) are some of organisms successfully spawned using gamete stripping. Furthermore, this technique obviously the only way to obtain mature gametes for species that can not be spawned by any physical or chemical stimulation. In some bivalves, viable eggs does not necessarily obtained immediately after stripping because naturally a series of activation process takes place in follicle prior to spawning, i. e. removal of germinal vesicles and formation of germinal spindle (Loosanof, 1953; Southgate, 2008). Loosanof and Davis (1963) treated eggs of Mercenaria mercenaria with 0.1N ammonium hydroxide (NH4OH), but the embryos did not develop well and leading to low percentage of normal larvae compared to their naturally spawned counterparts. So far, no reports about detail mechanisms on how NH4OH activates eggs, while comprehensive understanding of the process is absolutely important for optimization or probably substitute NH4OH with another potential substance. Stripping itself is a destructive and lethal method, thus it is not a sustainable way to maintain broodstock collections. Sacrificing superior broodstock must be invaluable loss that all hatcheries try to avoid it. Likewise, pearl oysters hatcheries prefer another spawning method that has no detrimental effects, considering the high value of the product and the oysters itself (Southgate, 2008). 2. Spawning Induction by Physical and Chemical Means 2.1 Chemical stimuli 2.1.1 Injections of sex steroids The presence of steroids in molluscs has been identified by Hagerman et al. (1957) and its fluctuations have a strong correlation with sexual maturation, gamete release, and sex determination in bivalve (Croll and Wang, 2007). A serotonin, 5 hydroxytryptamine (5-HT), works synergistically with steroid for those functions because steroids regulate 5-HT receptor on the membrane of gametes (Kadam et al., 1991). Combinations of 5-HT and steroid intragonadal injections are the most widely used in aquaculture farming practice. Efficacy of steroid treatment must be assessed on species basis because a particular steroid may give different results in different species. Similarly, one species could give various responses to some steroids, even if they have similar chemical structure. Published reports by Wang Croll (2003; 2004; 2006) explain clearly about gonadal maturation as well as spawning responses in sea scallop Placopecten magellanicus towards a number of steroid injections, both in vitro and in vivo. In vitro study by Wang and Croll (2003) shows 10-5-10-8 M progesterone and 17ÃŽÂ ²-estradiol potentiated gamete release in 5-HT-induced gonads tissue of P. magellanicus, both female and/or male. On the other side, testosterone (10-5-10-7 M) was only effective in male and no significant effects on dehydroepiandrosterone (DHEA) and 4ÃŽÂ ±-androsterone injections. Application of steroid inhibitors and control group (5-HT-incubated gonads) in the experiment strongly suggest steroids and steroid receptors involve in molluscan reproduction. Those results are confirmed with in vivo study by Wang and Croll (2006), although slightly different. Progesterone, which is able to initiate gamete release in male and female gonads tissue in vitro, demonstrated inhibitory effect in 5-HT-induced female P. magellanicus. Another interesting fact is the number of gametes released (spawning intensity) are sharply increased up to 300% and the response time after injection (spawning latency) reduced about 30%. Despite of its advantages, administration of sex steroid in bivalves farming apparently impose additional cost since serotonin must be used in parallel to obtain optimal result. In-depth economic calculations might be necessary to reach a balance between cost and benefits. 2.1.2 Hydrogen peroxide (H2O2) H2O2 application to induce bivalves spawning was first reported by Morse et al. (1977). He and his colleagues found that addition of 5mM of H2O2 to alkaline seawater successfully induced spawning, in both male and female gravid abalone Haliotis rufescens, within about 3 hours after the first addition. This effect results from activation of prostaglandin endoperoxidase by peroxides, which eventually triggers the spawning response. Their paper convincingly pointed that H2O2, neither another contaminants nor substances, initiates the spawning (Table 1). Destruction of H2O2 by catalase and mercaptoethanol (reducing agent) effectively blocks spawning. Aspirin, an inhibitor of cyclooxygenase and prostaglandin peroxidase synthesis, shows endoperoxidase synthesis is required for induction of spawning by H2O2. Table 1. Induction of spawning in gravid H. rufescens Treatment Total Number of Animals Tested Spawned Controls 77 (47F, 30M) 3 (2F, 1M) H2O 18 (13 F, 5 M) 0 H2O2 31 (17 F, 14 M) 30 (16 F, 14 M) Aspirin, then H2O2 26 (12 F, 14 M) 2 M Catalase, then H2O2 5 M 0 Mercaptoethanol, then H2O2 5 M 0 Note: F = female, M = male. Source: Morse et al. (1977) Nevertheless, less success was achieved in Indian pearl oysters P. fucata with H2O2 treatment as with abalone did (Alagarswami et al., 1983b). Mild spawning only occurred with 6mM H2O2 for 5 hours immersion. Supplementation of seawater with Tris buffer at pH 9.1, which usually effective for abalone, does not works well for P. fucata. These conversely results indicate H2O2 concentration must be optimized for any cultured species, sometimes in combination with other treatments. Since peroxide method is a simple and rapid technique, an assay for spawning bivalves which previously known difficult to spawn can be developed quite easily. Morse (1984) has been able to identify optimal conditions for gametogenesis and spawning of green (H. fulgens), pink (H. corrugata), and black abalone (H. cracherodii) using peroxide method. Spawning of these animals can be induced by H2O2 in a slightly high temperature (20-25Â °C). 2.1.3 Injections of neurotransmitters Serotonin, 5-HT, is the most widely used and probably the most potent neurotransmitter for artificial spawning purpose. In vitro study shows ovarian tissue of Patinopecten yessoensis released high number of eggs after been immersed in 10-6M serotonin (Matsutani and Nomura, 1987). The study also demonstrated interaction between serotonin and its receptors in ovary, as well as on how prostaglandins regulate serotonin performance in scallop. The efficacy of serotonin in vitro was confirmed in many in vivo studies. Gibbons and Castagna (1984) injected six species of bivalves with 2mM serotonin, nearly similar to the concentration used by Matsutani and Nomura (1987), and all of them spawned as expected with spawning latency 15-30 minutes (Table 2). For an unknown reason, there is a tendency serotonin more likely affected males than females. Table 2. Number of bivalves spawned by 5-HT injection Species Treatment Number of Tested Spawning Males Spawning Females Arctica islandica Control 70 0 0 Serotonin 70 15 4 Argopecten irradians Control 35 2 1 Serotonin 35 29 1 Crassostrea virginica Control 30 0 0 Serotonin 30 21 0 Geukensia demissa Control 20 1 0 Serotonin 20 8 1 Mercenaria mercenaria Control 70 0 0 Serotonin 329 116 21 Spisula solidissima Control 45 0 1 Serotonin 45 18 9 Source: Gibbons and Castagna (1984). Positive result was also obtained in giant clams, only Hippopus hippopus was less sensitive to serotonin (Braley, 1985). Another tested species (Tridacna gigas, T. derasa, T. maxima, T. crocea, T. squamosa) did very well in terms of spawning latency and spawning duration, even with a low dosage of serotonin. Therefore, injection of serotonin provides reliable way to induce spawning in giant clams, besides gametes-overlay method. Velez et al. (1989) carried out a more comprehensive research to see effect some neurotransmitters upon spawning induction in scallop Pecten ziczac. Given the number of neurotransmitters (dopamine, epinephrine, norepinephrine), only serotonine could induce spawning process. Moreover, they noticed that females give less response to serotonine than males do; similar to what Gibbons Castagna (1984) found. 2.1.4 Addition of gametes Tridacnid clams, such as T. maxima and T. squamosa, can be induced to spawn in captivity by introducing gonad extract from the opposite-sex into the mantel cavity (Gwyther and Munro, 1981; Munro et al., 1982). Three different gonad extracts were performed: gonad biopsy, freshly blended gonad, and freeze-dried blended gonad. Unfortunately, the author did not compare the treatments and describe the relevant results more detail. This induction technique is fairly simple in principles and implementation. Spawning occurs simply because synchronized release of gametes, on which gamete act as chemical cues or pheromones (Soong et al., 2005), a natural adaptation to increase external fertilization probability for broadcasting-gametes organisms. 2.1.5 Ultraviolet (UV)-irradiated seawater Seawater irradiated by light was a very powerful spawning inducer. Window-pane shell Placuna placenta responded quickly after been immersed in UV-irradiated seawater (Madrones-Ladja, 1997). The average number of eggs released per female using this treatment is as high as in serotonin treatment; furthermore the stimulus did not affect the viability of gametes. Besides of its reliable efficiency, this technique is very cost-effective and simpler than serotonin injection. It is also applicable for either individual or mass spawning, and does really works for both sexes of bivalves. 2.2 Physical stimuli 2.2.1 Temperature manipulation Manipulating water temperature is the most popular methods of spawning induction in bivalve hatcheries mainly because of its ease of application and reliable effectiveness. This technique has been studying intensively and implemented in pearl oyster P. maxima (Southgate and Beer, 1997) and various edible bivalves, such as American oyster Ostrea virginica (Soria et al., 2010) and brackish water bivalve Corbicula japonica (Baba et al., 1999). Reproductive physiology of O. virginica has been discovered more than decades ago, thus artificial reproductive control method has been set up very well (Galtsoff, 1938a; 1938b; 1940). Sudden change in water temperature from 20 to 32-35Â °C was found effectively stimulate spawning than long exposure to lower temperatures. In C. japonica, rising the temperature must be accompanied by salinity. Baba et al. (1999) demonstrated temperature 26Â °C with salinity 2.3-4.5 practical salinity unit (psu) give optimum yield. Moreover, addition of gamete suspension into the water is able to increase its fecundity. These three different factors may bring some complexity in terms of hatchery practice because optimization of those components is more likely indispensable. 2.2.2 Administration of microalgal food Immersing razor clams Siliqua patula in high density of phytoplankton is the only method so far that scientifically effective to induced spawning process. Breese and Robinson (1981) found 2-2.5 million cells ml-1 microalgae Pseudoisochrysis paradoxa stimulates razor clams to spawn. No published report that explains this phenomenon, so the exact mechanism does not understood well. It is maybe only a basic instinct of reproduction in nature when food present abundantly in environment. This method could be a good alternative instead of gamete stripping. The number of eggs released per clam as well as hatching rate was much higher compared to those obtain by stripping. In terms of aquaculture practicality, this technique is considerably easy and fairly inexpensive. 3. Conclusions There are numerous techniques to stimulate spawning process in bivalves. Basically, they are only mimicking natural process involved in natural reproduction cycle. No one of those techniques is more superior to another, therefore choosing the appropriate technique should be based on species cultured. Any cost associated, for instance chemicals and equipments, must be also taken into consideration.

Importance of chemical reactor

Importance of chemical reactor INTRODUCTION The most important unit operation in a chemical process is generally a chemical reactor. Chemical reactions are either exothermic (release energy) or endothermic (require energy input) and therefore require that energy either be removed or added to the reactor for a constant temperature to be maintained. Exothermic reactions are the most interesting systems to study because of potential safety problems (rapid increases in temperature, sometimes called ignition behavior) and the possibility of exotic behavior such as multiple steady-states (for the same value of the input variable there may be several possible values of the output variable). In this module we consider a perfectly mixed, continuously stirred tank reactor (CSTR), shown in Figure 1. The case of a single, first-order exothermic irreversible reaction, A > B. We will show that very interesting behavior that can arise in such a simple system. In Figure 1 we see that a fluid stream is continuously fed to the reactor and another fluid stream is continuously removed from the reactor. Since the reactor is perfectly mixed, the exit stream has the same concentration and temperature as the reactor fluid. Notice that a jacket surrounding the reactor also has feed and exit streams. The jacket is assumed to be perfectly mixed and at a lower temperature than the reactor. Energy then passes through the reactor walls into the jacket, removed the heat generated by reaction. There are many examples of reactors in industry similar to this one. Examples include various types of polymerization reactors, which produce polymers that are used in plastic products such as polystyrene coolers or plastic bottles. The industrial reactors typically have more complicated kinetics than we study in this module, but the characteristic behavior is similar. The Modeling Equations For simplicity we assume that the cooling jacket temperature can be directly manipulated, so that an energy balance around the jacket is not required. We also make the following assumptions Perfect mixing (product stream values are the same as the bulk reactor fluid) Constant volume Constant parameter values The constant volume and parameter value assumptions can easily be relaxed by the reader, for further study. Parameters and Variables A Area for heat exchange CA Concentration of A in reactor CAf Concentration of A in feed stream cp Heat capacity (energy/mass*temperature) F Volumetric flowrate (volume/time) k0 Pre-exponential factor (time-1) R Ideal gas constant (energy/mol*temperature) r Rate of reaction per unit volume (mol/volume*time) t Time T Reactor temperature Tf Feed temperature Tj Jacket temperature Tref Reference temperature U Overall heat transfer coefficient (energy/(time*area*temperature)) V Reactor volume DE Activation energy (energy/mol) (-DH) Heat of reaction (energy/mol) r Density (mass/volume) The parameters and variables that will appear in the modeling equations are listed Overall material balance The rate of accumulation of material in the reactor is equal to the rate of material in by flow-the material out by flow. Balance on Component A The balance on component A is where r is the rate of reaction per unit volume. Energy Balance The energy balance is where Tref represents an arbitrary reference temperature for enthalpy. State Variable form of Dynamic Equations We can write (1) and (2) in the following state variable form (since dV/dt = 0) where we have assumed that the volume is constant. The reaction rate per unit volume (Arrhenius expression) is where we have assumed that the reaction is first-order. Steady-State Solution The steady-state solution is obtained when dCA/dt = 0 and dT/dt = 0, that is To solve these two equations, all parameters and variables except for two (CA and T) must be specified. Given numerical values for all of the parameters and variables we can use Newtons method (chapter 3) to solve for the steady-state values of CA and T. For convenience, we use an à «sà ­ subscript to denote a steady-state value (so we solve for CAs and Ts). Dynamic Behavior We noted in the previous section that were three different steady-state solutions to the case 2 parameter set. Here we wish to study the dynamic behavior under this same parameter set. Recall that numerical integration techniques were presented in chapter 4. The m-file to integrate the modeling equations iscstr_dyn.m, shown in Appendix 2. The command to integrate the equations is [t,x] = ode45(cstr_dyn,t0,tf,x0); wheret0is the initial time (usually 0),tfis the final time,x0is the initial condition vector.tis the time vector andxis the state variable solution vector. Before performing the integration it is necessary to define the global parameter vectorCSTR_PAR. To plot only concentration or temperature as a function of time, useplot(t,x(:,1))andplot(t,x(:,2)), respectively. Initial condition 1 Here we use initial conditions that are close to the low temperature steady-state. The initial condition vector is [ conc , temp] = [9,300]. The curves plotted in Figure 2 show that the state variables converge to the low temperature steady-state. Initial condition 2 Here we use initial conditions that are close to the intermediate temperature steady-state. The initial condition vector for the solid curve in Figure 3 is [conc, temp] = [5,350], which converges to the high temperature steady-state. The initial condition vector for the dotted curve in Figure 3 is [conc, temp] = [5,325], which converges to the low temperature steady-state. If we perform many simulations with initial conditions close to the intermediate temperature steady-state, we find that the temperature always converges to either the low temperature or high temperature steady-states, but not the intermediate temperature steady-state. This indicates to us that the intermediate temperature steady-state isunstable. This will be shown clearly by the stability analysis in section 5. Initial condition 3 Here we use initial conditions that are close to the high temperature steady-state. The initial condition vector is [conc, temp] = [1,400]. The curves plotted in Figure 4 show that the state variables converge to the high temperature steady-state. In this section we have performed several simulations and presented several plots. In section 6 we will show how these solutions can be compared on the same à ¬phase planeà ® plot. Linearization of Dynamic Equations The stability of the nonlinear equations can be determined by finding the following state-space form and determining the eigenvalues of theA(state-space) matrix. The nonlinear dynamic state equations (1a) and (2a) are let the state, and input variables be defined in deviation variable form Stability Analysis Performing the linearization, we obtain the following elements forA where we define the following parameters for more compact representation From the analysis presented above, the state-space A matrix is The stability characteristics are determined by the eigenvalues ofA, which are obtained by solving det (lI-A) = 0. det (lI-A)=(l-A11)(l-A22)-A12A21 =l2-(A11+A22)l+A11A22-A12A21 =l2-(trA)l+det (A) the Eigen values are the solution to the second-order polynomial l2-(trA)l+det (A) =0(13) The stability of a particular operating point is determined by finding theAmatrix for that particular operating point, and finding the Eigen values of the A matrix. Here we show the Eigen values for each of the three case 2 steady-state operating points. Input / Output Transfer Function Analysis The input-output transfer functions can be found from G(s)=C(sI-A)-1B(14) where the elements of theBmatrix corresponding to the first input (u1 = Tj-Tjs) are the reader should find the elements of the B matrix that correspond to the second and third input variables (see exercise 8) Here we show only the transfer functions for the low temperature steady-state for case 2. The input/output transfer function relating jacket temperature to reactor concentration (state 1) is and the input/output transfer function relating jacket temperature to reactor temperature (state 2) is Notice that the transfer function for concentration is a pure second-order system (no numerator polynomial) while the transfer function for temperature has a first-order numerator and second-order denominator. This indicates that there is a greater à ¬lagà ® between jacket temperature and concentration than between jacket temperature and reactor temperature. This makes physical sense, because a change in jacket temperature must first affect the reactor temperature before affecting the reactor concentration. Phase-plane Analysis In section 4 we provided the results of a few dynamic simulations, noting that different initial conditions caused the system to converge to different steady-state operating points. In this section we construct a phase-plane plot by performing simulations for a large number of initial conditions. The phase-plane plot shown in Figure 6 was generated usingcstr_run.mandcstr.mfrom the appendix. Three steady-state values are clearly shown; 2 are stable (the high and low temperature steady-states, shown as à «oà ­), while one is unstable (the intermediate temperature steady-state, shown as à «+à ­). Notice that initial conditions of low concentration (0.5 kgmol/m3) and relatively low-to-intermediate temperatures (300 to 365 K) all converge to the low temperature steady-state. When the initial temperature is increased above 365 K, convergence to the high temperature steady-state is achieved. Now, consider initial conditions with a high concentration (9.5 kgmol/m3) and low temperature (300 to 325 K); these converge to the low temperature steady-state. Once the initial temperature is increased to above 325 K, convergence to the high temperature steady-state is achieved. Also notice that, once the initial temperature is increased to around 340 K, a very high overshoot to above 425 K occurs, before the system settles down to the high temperature steady-state. Although not shown on this phase-plane plot, higher initial temperatures can have overshoot to over 500 K before settling to the high temperature steady-state. This could cause potential safety problems if, for example, secondary decomposition reactions occur at high temperatures. The phase plane analysis then, is able to à ¬point-outà ® problem initial conditions. Also notice that no initial conditions have converged to the intermediate temperature steady-state, since it is unstable. The reader should perform an eigenvalue/eigenvector analysis for theAmatrix at each steady-state (low, intermediate and high temperature) (see exercise 3). You will find that the low, intermediate and high temperature steady-states have stable node, saddle point (unstable) and stable focus behavior (see chapter 13), respectively. It should be noted that feedback control can be used to operate at the unstable intermediate temperature steady-state. The feedback controller would measure the reactor temperature and manipulate the cooling jacket temperature (or flowrate) to maintain the intermediate temperature steady-state. Also, a feedback controller could be used to make certain that the large overshoot to high temperatures does not occur from certain initial conditions. Understanding Multiple Steady-state Behavior In previous sections we found that there were three steady-state solutions for case 2 parameters. The objective of this section is to determine how multiple steady-states might arise. Also, we show how to generate steady-state input-output curves that show, for example, how the steady-state reactor temperature varies as a function of the steady-state jacket temperature. Heat generation and heat removal curves In section 3 we used numerical methods to solve for the steady-states, by solving 2 equations with 2 unknowns. In this section we show that it is easy to reduce the 2 equations in 2 unknowns to a single equation with one unknown. This will give us physical insight about the possible occurance of multiple steady-states. Solving for Concentration of A as a function of Temperature The steady-state concentration solution (dCA/dt) = 0) for concentration is We can rearrange this equation to find the steady-state concentration for any given steady-state reactor temperature, Ts Solving for Temperature The steady-state temperature solution (dT/dt = 0) is The terms in (17) are related to the energy removed and generated. If we multiply (17) by VrCp we find that Qrem=Qgen Energy Removed by flow and heat exchange Heat Generated by reaction Note the form of Qrem Notice that this is an equation for a line, where the independent variable is reactor temperature (Ts). The slope of the line is and the intercept is. Changes in jacket or feed temperature shift the intercept, but not the slope. Changes in UA or F effect both the slope and intercept. Now, consider the Q gen term Substituting (16) into (20), we find that Equation (21) has a characteristic S shape for Q gen as a function of reactor temperature. From equation (18) we see that a steady-state solution exists when there is an intersection of the Q rem and Q gen curves. Effect of Design Parameters In Figure 6 we show different possible intersections of the heat removal and heat generation curves. If the slope of the heat removal curve is greater than the maximum slope of the heat generation curve, there is only one possible intersection (see Figure 6a). As the jacket or feed temperature is changed, the heat removal lines shifts to the left or right, so the intersection can be at a high or low temperature depending on the value of jacket or feed temperature. Notice that as long as the slope of the heat removal curve is less than the maximum slope of the heat generation curve, there will always be the possibility of three intersections (see Figure 6b) with proper adjustment of the jacket or feed temperature (intercept). If the jacket or feed temperature is changed, the removal line shifts to the right or left, where only one intersection occurs (either low or high temperature). This case is analyzed in more detail in section 7.3. Multiple Steady-State Behavior In Figure 7 we superimpose several possible linear heat removal curves with the S-shaped heat generation curve. Curve A intersects the heat generation curve at a low temperature; curve B intersects at a low temperature and is tangent at a high temperature; curve C intersects at low, intermediate and high temperatures; curve D is tangent to a low temperature and intersects at a high temperature; curve E has only a high temperature intersection. Curves A, B, C, D and E are all based on the same system parameters, except that the jacket temperature increases as we move from curve A to E (from equation (7) we see that changing the jacket temperature changes the intercept but not the slope of the heat removal curve). We can use Figure 7 to construct the steady-state input-ouput diagram shown in Figure 8, where jacket temperature is the input and reactor temperature is the output. Note that Figure 8 exhibits hysteresis behavior, which was first discussed in chapter 15. The term hysteresis is used to indicate that the behavior is different depending on the direction that the inputs are moved. For example, if we start at a low jacket temperature the reactor operates at a low temperature (point 1). As the jacket temperature is increased, the reactor temperature increases (points 2 and 3) until the low temperature limit point(point 4) is reached. If the jacket temperature is slightly increased further, the reactor temperature jumps (ignites) to a high temperature (point 8); further jacket temperature increases result in slight reactor temperature increases. Contrast the input-output behavior discussed in the previous paragraph (starting at a low jacket temperature) with that of the case of starting at a high jacket temperture. If one starts at a high jacket temperature (point 9) there is a single high reactor temperature, which decreases as the jacket temperature is decreased (points 8 and 7). As we move slighly lower than the high temperature limit point (point 6), the reactor temperature drops (also known asextinction) to a low temperature (point 2). Further decreases in jacket temperature lead to small decreases in reactor temperature. The hysteresis behavior discussed above is also known asignition-extinctionbehavior, for obvious reasons. Notice that region between points 4 and 6 appears to be unstable, because the reactor does not appear to operate in this region (at least in a steady-state sense). Physical reasoning for stability is discussed in the following section. Conclusion and future work Finally the conclusion is that a small study on the continuous stirred tank reactor and its model equation after going through we come to know its importance in the chemical engineering field and also its significance as a chemical reactor The future work is that we have to calculate and prove the equation of the continuous stirred tank reactor using Laplace transformation and check it using the MATLAB he equation of the continuous stirred tank reactor using Laplace transformation and check it using the MATLAB