Modern Science Over The Course Of The Year - 1502 Words

We have been reviewing modern science over the course of the year. But trying to compare and contrast the transition between modern and contemporary. How has contemporary changes impacted science, and the understanding. My view of Modern science is material evidence to support theories and concepts. As we look at philosophers closely connected with it, we get names like Copernicus, Galileo, Newton, and Gottfriend Leibniz. Copernicus he is best known as the first astronomer to posit the idea of a heliocentric solar system; a system in which the planets and planetary objects orbit the sun. This can be backed up with physical observation from a telescope. Galileo invented the telescope and made observations about the moon around Jupiter. Newton is famous for discovering several laws and theories of physics and motion that are collectively known as Newton s Laws. The laws that he is most famous for are the first, second and third laws of motion and the universal law of gravity. He has ma terial evidence to back up these claims. And the evidence came through experiments that are a main part of modern science. Gottfriend Leibniz is probably most well known for having invented the differential and integral calculus Some of the major ideas that caught my eye, one is the ‘Fact-value’ distinction that radically separated ‘facts’ (the ‘sciences’) from ‘values’ (the emotive or sentiment aspects of human experience) emerged. Trying to back up facts with evidence that are more than justShow MoreRelatedComparison Between Edinburgh And France1301 Words   |  6 Pages3.0 Comparison between Edinburgh and France The main reason for the exchange year is to engage yourself with the culture and history of the city that you have chosen and for me it was Edinburgh. I love this city because it is the perfect example of a blend of medieval architecture, nature and modernity. Strolling around the city, you can see its gothic style architecture and other 16th century monuments around the city. While walking the streets of Royal Mile, we can see the gorgeous gothic styleRead MoreNicholas Copernicus : Heroes And Villains933 Words   |  4 Pagessignificant impact on future astronomers and led to the birth of modern science. Copernicus’ discoveries had a significant effect on the scientists, astronomers, and mathematicians of the next two centuries. For example, â€Å"Tycho Brahe (1546-1601), the Danish astronomer, ... one of Copernicuss immediate successors, †¦ [made] painstaking observations and calculations proved the fundamental truth of the Copernican system. †¦ [he was the] father of modern practical astronomy.† Because Copernicus sparked the CopernicanRead MoreSocial Change and then Post Modernity1090 Words   |  4 Pagesputs emphasis on the free. It is an anything goes theory, full of new age beliefs and decisions. There is no consensus regarding when exactly postmodernity started, what it actually is, or whether it even exists. The term postmodern is irrational: modern means now, present, and up-to-date. Whereas postmodern means nothing but future. Post modernism as a sociological theory argues the fact that no one theory is better than the other. It is a sociological theory very much against the standard ‘assumptions’Read MoreThe Renaissance Era Essay866 Words   |  4 Pagestheatre or music or any other thing in life. In the renaissance many inventions and discoveries were made. A few examples would be the exploring of continents, Ptolemaic astronomy, the decline of feudal system, paper, printing, the compass, and of course, the use of gunpowder. The renaissance began in the 1400’s although some historians believe it originated with Frederick the second (1215-1250). If the renaissance didn’t start with Frederick, it was at least anticipated. He was one of the firstRead MoreThe Evolution of Western Thought Essay1502 Words   |  7 PagesThroughout modern history no other period of human evolution has had a greater effect on the way people think than the enlightenment. The philosophers and great thinkers of the enlightenment changed the logic of the human mind for the better and propelled a period of mass advancement in all aspects of society. Western thought progressed over time to help build a more intellectual society. Modern philosophers such as Max Horkheimer and Immanuel Kant incorporated their views of Western Thought intoRead MoreThe Science Of Science And The Conceptual Understanding899 Words   |  4 PagesLearning the History of science has an authentic significant to provide an obvious understa nding for learners since that will lead them to visualize the progression of science from A to Z. According to Richard K Moran and Page Keeley in their book â€Å" Teaching For Conceptual Understanding in Science,† theories, hypotheses, and interpretations those were created by distinguished ancient scientists throughout the previous centuries must be included side by side with the modern science. Chapter two of theRead MoreBiography Of Isaac Newton s Life1274 Words   |  6 PagesJulian Calendar, when one of the greatest minds of science was born, Isaac Newton. He was born and raised in the town of Woolsthorpe, United Kingdom. Born without a father and raised by his maternal grandmother after his mother left to remarry a wealthier man, since three years old, Newton lead an unforgettable childhood. Newton’s mother came back when her second husband died. His mother’s return in 1653 forced Newton to halt his education and take over the farm. Deprived of his mothe r’s love, NewtonRead MoreWe Need Look No Further Than The Final Seasons Of The Majority920 Words   |  4 Pagessuperiority over any ways of thinking that ruled past cultures; however, particularly for a religiously-based course, that kind of thinking is highly problematic. For the purposes of this essay I will attempt to traverse the narrow line of objectivity and compare and contrast two worlds. These two worlds are the Old and New, and are heavily subjective and conventional in nature, but nevertheless this inquiry will continue as planned. The rise of soteriology and a new kind of guilt, truth, and science gaveRead MoreElectrical Engineering And The Field Of Engineering1476 Words   |  6 Pagescenters on the practical application of electricity, electromagnetism and electronics. The field is of considerable necessity to modern life and infrastructure, having applications in many diverse branches of modern life. Some of these include telecommunications, energy and power distribution, transportation, manufacturing and consumer electronics. In this report we will go over the education and coursework requirements, fields of the industry, the work environment, salary, tools of the trade, and professionalRead MoreAddressing Diverse Interests Of The Campus Essay1523 Words   |  7 Pagesas the faculty, food services, and parking. Without quality amenities the campus will seem less desirable to prospective and current students. With a school dependent on tuition-based revenue, such as Bellarmine, it is important to have the most modern facilities and amenities to keep the University as prestigious and desirable. To begin, the lack of diversity amongst Bellarmine is alarming. Most professors at Bellarmine are alumni or from the University of Louisville. Currently, the institution

The Interesting Narrative And Other Writings By Olaudah...

In The Interesting Narrative and Other Writings by Olaudah Equiano, Equiano gave interesting descriptions of his and others experience as a slave. He begins his novel by first explaining the place where he grew up, Nigeria, Africa. This part of Africa during that time was very fruitful and rich. Given this location, it can be understood that Equiano came from a family of wealth and power. He was the youngest and most favored of his siblings. Equiano explained the different African traditions and practices, i.e. honoring the dead, arranged marriages, dance ceremonies. Equiano loved Africa and his family but sadly one horrific day, he and his older sister were stolen from their home and later separated from each other. Not only was he†¦show more content†¦Equiano described the cruelty of the crew who kept watch of the Africans. If an African refused to eat, they received an hour of whipping or, even if one preferred death to being a slave, they were brutally punished. Equiano even witnessed the crew hurting one another, to the point where some died and had to be thrown overboard into the sea. A few of the Africans could no longer handle the mistreatment of being a slave and jumped overboard in attempt of suicide. Some succeeded, but those who did not succeed were lifted back on board and beaten unmercifully. At some point, most of the Africans were placed in the basement of the ship and had to endure one another’s stench. There was lack of health assistance and they were not allowed to properly excuse themselves to use the restroom. Because there was lack of fresh air and they had to stay in the basement for days at a time, many of the Africans got sick (Equiano 58). Equiano pondered why the white men treated their slaves so poorly, because slaves in Africa were never treated so inhumane. While living with his master, working on slave ships, and working on a plantation, Equiano had seen many practices of slavery in America. The way Americans treated their slaves was very different than the way Africans treated their slaves. For those who survived the slave ship, they were separated and

Marketing strategy of amazon Free Essays

Marketing strategy is necessary in every business. No matter how rich a certain business is, its resources are always restricted. Thus marketing strategy provides a certain business to allocate his resources properly in order for his business to be more productive. We will write a custom essay sample on Marketing strategy of amazon or any similar topic only for you Order Now Marketing mix is also essential in the marketing field, and it is basically the reason why the marketing mix (4 P’s) is tackled under marketing strategy. The four essential P’s are the product, the price, the place, and the promotion. Without considering these four essential P’s ones business is doomed to fail. A marketing manager needs to have enough knowledge in order to better determine how to properly organize this marketing mix. This paper aims to focus on whether the Amazon.com is doing a great marketing strategy. It is a well-known fact that many businesses aims on promoting their products in order to receive better responses from their customers. The necessity of promoting their products are included in the marketing mix and thus a business that knows how to promote his product well would succeed most likely than those who do not have any knowledge in product promotions. Going back to the strategy of amazon.com many wonders why they promote their new products side by side with used and old products. There are people who question the rationality behind this because people think that most consumers would tend to buy things which are cheaper compared to the newer and more expensive items particularly books. Thus, this paper aim to analyze what was the reason behind this particular strategy of amazon.com, whether their strategy is effective or not and the like. Amazon.com is one of the most famous e-commerce companies. Amazon.com sells their products via internet thus making it more convenient for people who do not have enough time to do their shopping outside their homes. Jeff Bezos started amazon.com in 1994 and up to now amazon.com is still continuing with their business. Amazon.com started by selling books online but as of today they are no longer limited on selling books via the internet. Amazon.com’s products ranges from cd’s, dvd’s, books, clothes, cars, etc. The Amazon.com is a little off the track with their marketing strategy. For one, they are willing to ship products ranging from $25 or more for free. Such shipments could be very costly even from an established business as Amazon. However, in spite of the losses of Amazon.com they are still well-liked by their customers due to their good services and customer satisfaction is very important in every business. Thus, in this regard Amazon.com shows good marketing strategy in terms of pleasing their customers. However this particular aspect where amazon.com is good at is very short-lived. The strategy Amazon found to reconstruct their selves is by contacting retailers and asking them to sell some of their products at Amazon. Thus, companies such as Gaps, Circuit City Stores Inc and the like sell some of their products at Amazon as well as on their own websites. This particular strategy raised Amazon’s profit to 22%. However, business experts saw that Amazon’s sale could still grow by the year of 2008 if they would improve some aspects on their websites. By doing this Amazon could draw more retailing companies to join forces with them. Their website had also gotten so full to the point that shopping online on Amazon is no longer as convenient and as easy as it used to especially since so many url’s links customers from one website to another. Thus, if only Amazon.com would try to lessen the mess their website is in then the better their business would be. In terms of using the 4 P’s Amazon.com is doing fine in the price part since their prices are very reasonable added to the fact that they gives free shipment for some products. Amazon.com could also be found nationwide because they have opened stores on different countries such as Japan, Germany, etc. This particular strategy is good because it allows them to cover customers in a wide-range basis. However, Amazon.com shows difficulty in promoting most of their products because their website is not very organized. Searching for your desire product could be very strenuous for many insignificant links appears one after another. In terms of products they may be doing alright for they sell products with qualities however, their promotion of their product is not really good and thus they should focus on their marketing promotion to in order to attract customers and other retailers more. (Behr). Amazon.com has certain advantages though as mentioned earlier especially on their venture to merging with other retailers. They are also one of the most well-known on the e-commerce aside from the fact that they are managing to compete head on with other well-known businesses such as IBM, Microsoft, etc. In terms of selling old books side-by-side with new ones, Amazon has a good reason for that one too. Amazon.com aims to cater to the needs of different kinds of consumers. There are those who want new things no matter how expensive those things may be. However, there are those who does not really care on whether they are buying something old or new as long as they could afford the price. Thus in this regard Amazon.com is doing a great strategy by catering to the needs and wants of different kinds of consumers. By showing old books side by side with new ones they are also making it easier for their customers to better analyze which one they would pick. For example if Book A costs $15 if it is new and $13 if it is old and used then I would better analyze the pros and cons of buying a new book to that of buying the old one especially if the price difference is only $2. Overall this particular strategy of Amazon could be looked at in different light. However, this particular strategy may be serving Amazon’s purposes well and thus in this regard I think that showing your customer new products as compared to new ones is a good strategy. In a way it is the same as shopping in a certain shop wherein you ask for a particular book whose price is $25 and your money is only $20. Part of a business strategy is to provide an alternative thus it would be of no surprise if the saleslady would ask how much money you have with you and when you say $20 she would tend to show you a copy of the same book although the second one is used but in a lower price as compared to the new book. I am sure that Amazon is using this particular tactic in the same light as the hypothetical saleslady did. Reference: Behr, Mary E. â€Å"Case Study: Amazon.Com.† 2003.       How to cite Marketing strategy of amazon, Essay examples

Importance of Plagiarism for the Universities-Samples for Students

Question: Discuss about the Importance of Plagiarism across the Universities. Answer: Introduction It would be correct to say that plagiarism is an important issue across the universities. Generally speaking there could be intended or unintended plagiarism. However, an increased extend of plagiarism for university students is document falsification. There are various cases and chances of document falsification. In a classical sense, university students can get their assignments done from other sources. The students would in turn pay the organizations or individuals to get their assignment done. The problem for universities is that they cannot determine if student has done the assignment or someone else has done it (Bakhtiyari Salehi, 2014). The students would pay for the genuine content so that it passes the check of plagiarism software. It is observed that In the University sector individuals and businesses are offering assignment writing services to students, in effect writing an essay or report to published assessment criteria, for a fee, which the student then falsely submits it as his or her own work (Prinsloo Slade, 2013). There are various ethical questions around this sort of document falsification. Is it ethical at the end of student to get assignment help from other people? Or, is it ethical for people to write the assignments for students? While, it is important to discuss the above questions, it is equally important to understand the key drivers or motivation for student to get the work done from other sources. Obviously, students have to pay for these services, then why do students take these services. One of the reasons is that assignment is too difficult, or students does not have time to complete the task or the third reason could be that student does not have an attitude or will to complete the task and he or she is looking for shortcuts (Drumwright Murphy, 2014). The objective of this paper is to discuss this type of document falsification with respect to various ethical theories and models. Analysis It is not a very uncommon practice for students to get the work done from other sources. It is correct that it raises various ethical questions. However, students still engage in these practices. The practice of a student paying for someone to write an assignment and then submitting it as their own work is indeed an ethical issue. This is an ethical issue because students are expected to complete their work by themselves. The entire idea of students getting education in universities is to learn and gain knowledge (Fusch Ness, 2017). The knowledge does not come just by enrolling in different courses. The knowledge comes when students work hard and learn the concepts. The assignments and assessments are important for students to learn the concepts. Therefore, it is important that students should not get trapped in the issues of document falsification. The ethical issues involved in the scenario of plagiarism can be discussed with respect to personal issues and professional issues. Pro fessional ethics are a set of guidelines that protect your professional identity through strict rules learned through the teachings of an institution (Yadav Rawal, 2016). Personal ethics, on the other hand, is personal moral qualities learned through the interactions of friends and family which exemplify honesty, care, and sincerity. The issue of plagiarism and taking assignment help from other sources is a mix of personal ethical issue and professional ethical issue. It is a personal ethical issue and students are expected to show high moral standards. It is believed that students are the building blocks of society and therefore, students must have high ethical and moral values. At the same time, the issue of plagiarism and taking assignment help from other sources is also an issue of professional ethics (Vehvilainen Lofstrom, 2017). It is an issue of professional ethics because the professional entity, universities in this case, does not allow or does not expect students to enga ge in any sort of plagiarism issue. In fact, the professional body, university administration in this case, have strict policies around plagiarism and students can even be disqualified from course in case of plagiarism. Having said that, it is also true that some sort of plagiarism could be acceptable. For example, is students are writing an essay on ethics and they want to define the term, utilitarianism ethics. It may not make much senses to change the definition of a term (Nam Weaver, 2015). In this case, student may want to use the definition, as it is. However, in this case, it is important that student must give the proper reference to the definition. The underlying inference is that student must give reference to the sources from where he or she is taking the definition. As a thumb rule, it can be said that a plagiarism score up to 10% is fine. In fact, there are various universities that consider the issue of plagiarism only when the score of plagiarism software is more tha n 10% (Engel, 2016). From the organizations point of view it is indeed unethical to offer this type of services. By indulging in any sort of this service, organizations are giving a platform to students where they can compromise on their moral values. The business sense of doing business would suggest that if there is a demand, there should be a supply (Valentine, 2006). However, in case of demand also, the supply of this kind of services does not justify the ethical concerns. It would be interesting to analyze the organizational ethical issues with respect to four levels of business ethics. The four levels of business ethics could be applied in this case as: The society level: At the societal level, we ask questions about the basic institutions in a society. Is it ethical correct to have a system where students get the assignment help from other individuals or organizations? The societal view would suggest that it is not ethical for students get the assignment help from other individuals or organizations because it can create a bad culture in the society where people are not honest (Engel, 2016). The industry level or the stakeholder level: At the industry level, we ask questions about how a company should deal with the external groups affected by its decisions, as well as how the stakeholders should deal with the company. Is it ethical correct to have a system where students get the assignment help from other individuals or organizations? The industry level view would suggest that it may not be ethical to get assignment help from other sources. However, the intensity of unethical behavior or moral values is less in the industry level as compared to societal level (Scanlon, 2013). At the stakeholder level, this practice is not ethical because it is doing more harm than good. The company level or the level of internal policy: At the company level or at the organization level, the ethical issues is discussed with respect to organization mission, business, growth and development. The question to ponder would remain same in this case, is it ethical correct to have a system where students get the assignment help from other individuals or organizations? The analysis at the company level would suggest that this issue may not a grave ethical issue. The main objective or the corporate objective of any business is to make profits. It is correct that the organizations must practice the path of corporate social responsibility. However, CSR cannot be practiced at the expense of profitability and revenue (Nam Weaver, 2015). However, the sense of doing business would suggest that organizations should conduct business in the area that is not harmful to society at large and it appears that the industry of assignment help is harmful to society. The individual manager level or at personal level: At the individual level, we ask questions about how people should treat one another within an organization. The question to ponder would be same, is it ethical correct to have a system where students get the assignment help from other individuals or organizations? In this case the answer would be no. It cannot be ethical at the individual level to involve in any sort of assignment help. As a part of a responsible society, all the stakeholders must remain connected to a single point of view of problem. The single view of the problem is that it is a serious ethical issue to take or to give any sort of assignment help (Robinson, 2014). Therefore, it is important that organizations, individuals, and students must refrain from this. The question, is it ethical correct to have a system where students get the assignment help from other individuals or organizations, could also be discussed with respect to various ethical theories. The discussion from the perspective of three key ethical theories can be discussed as: Consequentialism theory of ethics: Consequentialism is the class of normative ethical theories holding that the consequences of one's conduct are the ultimate basis for any judgment about the rightness or wrongness of that conduct (Rossi Sleat, 2014). Here the consequences are not good as students would not be able to learn anything if he or she engages himself or herself in assignment help practices. Therefore, the Consequentialism theory would suggest that it is not ethical correct to have a system where students get the assignment help from other individuals or organizations (Martinez Wueste, 2016). Deontology theory of ethics: In moral philosophy, deontological ethics or deontology is the normative ethical position that judges the morality of an action based on rules. The university rules would clearly suggest that students must not conduct any sort of cheating practice. Therefore, it would be correct to say that the deontology theory of ethics would advocate that it is not ethical correct to have a system where students get the assignment help from other individuals or organizations. The university rules do not allow or does not expect students to engage in any sort of plagiarism issue. In fact, the professional body, university administration in this case, have strict policies around plagiarism and students can even be failed from course in case of plagiarism. Virtue ethics: The virtue theory of ethics is slightly different as it is an approach to Ethics that emphasizes an individual's character as the key element of ethical thinking. It can be said that virtue ethics theory would keep it open for interpretation at individual level (Abasi Akbari, 2006). It can be said that the virtue ethics theory would also suggest that it is not ethical to have a system where students get the assignment help from other individuals or organizations. However, the individuals can take their own decision with respect to this. The basic model of intent, action and outcome would suggest that the outcome would not be very good if students engage themselves in any sort of cheating practice. The intent of the students could be to save time or save efforts (Larkham Manns, 2002). The action of the students is to contact the organizations or the individuals that provide assignment help and the outcome of this is that students end up paying for assignments and they do not learn from the course concepts. This basic model suggests that intent and action of students ultimately results in bad outcome (Lau Yuen, 2013). Conclusion The above paper discusses if it is ethical to have a system where students get the assignment help from other individuals or organizations. With the above discussion, it can be said that it is not an ethical practice. The paper discusses the issue from various ethical models and theories. Almost, all the models and theories suggest that the outcome is not good in long term. Therefore, students should not use these practices. References Abasi, A. R., Akbari, N., Graves, B. (2006). Discourse appropriation, construction of identities, and the complex issue of plagiarism: ESL students writing in graduate school.Journal of Second Language Writing,15(2), 102-117. Bakhtiyari, K., Salehi, H., Embi, M. A., Shakiba, M., Zavvari, A., Shahbazi-Moghadam, M., ... Mohammadjafari, M. (2014). Ethical and unethical methods of plagiarism prevention in academic writing. Drumwright, M. E., Murphy, P. E. (2014). Ethical Issues of Social Marketing and Persuasion.The Handbook of Persuasion and Social Marketing [3 volumes],175. Engel, C. (2016). Ethical Standards of Scientific Research for Beginning Accounting Scholars.Business and Economic Research,6(1), 129-136. Fusch, P. I., Ness, L. R., Booker, J. M., Fusch, G. E. (2017). The Ethical Implications of Plagiarism and Ghostwriting in an Open Society.Journal of Social Change,9(1), 4. Larkham, P. J., Manns, S. (2002). Plagiarism and its treatment in higher education.Journal of Further and Higher Education,26(4), 339-349. Martinez, N., Wueste, D. (2016). Balancing theory and practicality: engaging non-ethicists in ethical decision making related to radiological protection.Journal of Radiological Protection,36(4), 832. Nam, K. A., Weaver, G. (2015). Major ethical issues in the field of intercultural relations: An exploratory study.International Journal of Intercultural Relations,48, 58-74. Lau, G. K., Yuen, A. H., Park, J. (2013). Toward an analytical model of ethical decision making in plagiarism.Ethics Behavior,23(5), 360-377. Robinson, S. R. (2014). Self-plagiarism and unfortunate publication: an essay on academic values.Studies in higher education,39(2), 265-277. Rossi, E., Sleat, M. (2014). Realism in normative political theory.Philosophy Compass,9(10), 689-701. Scanlon, P. M. (2003). Student online plagiarism: How do we respond?.College Teaching,51(4), 161-165. Slade, S., Prinsloo, P. (2013). Learning analytics: Ethical issues and dilemmas.American Behavioral Scientist,57(10), 1510-1529. Valentine, K. (2006). Plagiarism as literacy practice: Recognizing and rethinking ethical binaries.College Composition and Communication, 89-109. Vehvilainen, S., Lofstrom, E., Nevgi, A. (2017). Dealing with plagiarism in the academic community: emotional engagement and moral distress.Higher Education, 1-18. Yadav, S., Rawal, G., Baxi, M. (2016). Plagiarism-A serious scientific misconduct.Int J Health Sci Res,6(2), 364-366.

Worldcom Enron Fraud Bankruptcy free essay sample

WorldCom Fraud Bankruptcy (21/07/2001); Assets: $107 billion Long Distance Discount Services, Inc. (LDDS) began in Hattiesburg, Mississippi. in 1983. The company name was changed to LDDS WorldCom in 1995, and later just WorldCom. The company’s growth under WorldCom was fueled primarily through acquisitions during the 1990s and reached its apex with the acquisition of MCI in 1998. WorldCom’s financial scandals and bankruptcy led that company to change its name in 2003 to MCI. The MCI name disappeared in January 2006 after the company was bought by Verizon. WorldCom’s bankruptcy filing in 2002 (21st July 2002) was the largest such filing in U. S. history. The WorldCom scandal is regarded as one of the worst corporate crimes in history, and several former executives involved in the fraud faced criminal charges for their involvement. Evidence shows that the accounting fraud was discovered as early as June 2001, when several former employees gave statements alleging instances of hiding bad debt, understating costs, and backdating contracts. We will write a custom essay sample on Worldcom Enron Fraud Bankruptcy or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page In 2002, a small team of internal auditors at WorldCom worked together, often at night and in secret, to investigate and unearth $3. billion in fraud and the U. S. Securities and Exchange Commission (SEC) launched an investigation into these matters on June 26, 2002. By the end of 2003, it was estimated that the companys total assets had been inflated by around $11 billion. As a result, the SEC filed a civil fraud lawsuit against WorldCom and federal charges were filed against several executives. The fraud was accomplished primarily in two ways: 1. Underreporting ‘line costs’ (interconnection expenses with other telecommunication companies) by capitalizing these costs on the balance sheet rather than properly expensing them. . Inflating revenues with bogus accounting entries from corporate unallocated revenue accounts. Some of the high-ranking WorldCom executives and other employees who are implicated in the accounting fraud. Most notably, company founder and former CEO Bernard Ebbers was sentenced to 25 years in prison, and former CFO Scott Sullivan received a five-year jail sentence, which would have been longer had he not pleaded guilty and testified against Ebbers. WorldCom, crushed by its $41 billion debt load, made its filing in the Southern District of New York. With $107 billion in assets. Under the bankruptcy reorganization agreement, the company paid $750 million to the SEC in cash and stock in the new MCI, which was intended to be paid to wronged investors. Enron Fraud Bankruptcy (12/02/2001); Assets: $65. 5 billion The Enron Corporation (former NYSE ticker symbol ENE) was one of the largest energy company based in Houston, Texas that sold electricity and natural gas. They were also involved in the distribution of energy and risk management and financial services to many people worldwide. Enron employed approximately 22,000 and was one of the world’s leading electricity, natural gas, pulp and paper, and communications companies, with claimed revenues of nearly $101 billion in 2000. This company gained wealth due to its initiative marketing and endorsement of power and communications services and risk management offshoots. Fortune named Enron â€Å"America’s Most Innovative Company† for six consecutive years. The company became very successful and seemed indestructible. Everything seemed rosy until they filed for bankruptcy in 2001. At the end of 2001 it was revealed that its reported financial condition was sustained substantially by institutionalized, systematic, and creatively planned accounting fraud, known as the â€Å"Enron scandal†. With all this success and rapid expansion the company had to borrow money. This was in a bid to cover up their excess debts. The debts would have made the stock value dip and they could not take that chance. So they opted to hide their debts in ‘partner’ corporations. With this information under wraps Enron kept looking better because of their unethical and illegal accounting practices. They also began favoring potential large investors with insider information while ignoring the smaller investors. Other industry peers began questioning how the company made so much money time and again. While all this was going on the company’s CEO was secretly selling his stock. By October 2001, they could no longer hide the illegal practices in the company. They announced a loss of $ 638 million dollars. The stock price took a dive until it was worth nothing. Then came in the creditors claiming their debts be paid before the company shut its doors. Since they could not repay its debts, the company was forced to file for bankruptcy. Besides the financial department, the operations management department also had a role to play in the collapse. The company’s values and principles were not followed since most employees were in it to also get rich. The Enron scandal, revealed in October 2001, eventually led to the bankruptcy of the Enron Corporation, the dissolution of Arthur Andersen, which was one of the five largest audit and accountancy partnerships in the world. In addition to being the largest bankruptcy reorganization in American history at that time, Enron undoubtedly is the biggest audit failure. On January 17, 2002 Enron fired Arthur Andersen as its auditor, citing its accounting advice and the destruction of documents. Enron was estimated to have about $23 billion in liabilities, both debt outstanding and guaranteed loans. Citigroup and JP Morgan Chase in particular appeared to have significant amounts to lose with Enron’s fall. Additionally, many of Enron’s major assets were pledged to lenders in order to secure loans, throwing into doubt what if anything unsecured creditors and eventually stockholders might receive in bankruptcy proceedings.

Laborem exercens Essay Example

Laborem exercens Essay Example Laborem exercens Essay Laborem exercens Essay Laborem Exercens Part One: â€Å"Introduction† Work is one of an aspect in life that differentiates man from the rest of the creatures. In addition, he must perform in order for him to earn his daily bread and contribute to the advancement of technology, science, political and economical status in the world. Automation of production, the high cost of raw materials, and the emergence of democratic revolution affected the distribution of work. According to Paulus (1981), work is part of what is old. However, man devised a way of specialization of work and division of labor in order to cater for the various aspects of life like geography, culture, and civilization. Ever since, the only purpose of work is capital and property. This means that man has to work in order to produce goods and services. It makes no sense to divide labor and capital separately. However, work serves man in ownership of property hence the existence of man on earth is essential on work. Part Two: â€Å"Work and Man† In the book of Genesis, is written that, the main aspect of human existence on earth is dependent on work. Man dominates the world by domestication of animals and obtaining food and clothing from them, farming and extraction of minerals from the sea hence starting the industrial era. Development and advancement of technology has made the work of man easier and simpler thus creating a specialization of work. Workers solidarity came about after injustice in the system came about. Their solidarity and worker’s rights have brought many changes like the control of productivity and running of the business. Paulus (1981) also states that, â€Å"On the world level, the development of civilization and of communications has made possible a more complete diagnosis of the living and working conditions of man globally.† Moreover, other forms of injustices, which were more extensive, have come up. Part Three: â€Å"Conflict between labor and capital in the present phase of history† During the period of â€Å"Rerum Novarum†, the industrial insurgency brought about the conflict between labor and capital that later transpired into a struggle of the various classes in the society. In addition, the greed motivated by the opportunities for the unique profits that the industrial revolution brought about, man, the most important factor in work, hence relegated to a subsidiary role based on the economic value of his contribution to the industrious process. Moreover, it contributed to removing the conflicts between workers. Unemployment need to be deal with, as it is a major drawback to the wellness of the economy of the world. Part Four: â€Å"Rights of workers† The rights of workers should include job offers to disabled persons. In addition, they should include salaries, medical insurance, retirement benefits, and work leave every year. According to catholic teachings, workers unions are a mouthpiece for lesser-paid workers in the industry. God sees the spirituality of work especially on human. Paulus (1981) states that, â€Å"an inner effort on the part of the human spirit, guided by faith, hope, and charity, is needed in order that through these points the work of the individual human being may be given the meaning, which it has in the eyes of God†. Whichever department one works in, he or she should work heartily as if he or she is serving God not man, remembering that the chosen one will receive inheritance as a return. Later, our actions here on earth will determine the resulting outcome. Part Five: â€Å"Elements for a spirituality of work† If a man gains the world and loses himself, he has no use in this world. Moreover, God’s kingdom should be eminent from the earthly possessions. In the end, it is in our very nature that man must work in order to sustain himself and his family in this changing world. Sweat and fatigue are in our everyday lives as we work for a better future. Christians should pray and have unity in the work place in order to build a stronger nation with good morals. Reference Paulus, Ioannes PP. II (1981). Laborem exercens. Retrieved from vatican.va/holy_father/john_paul_ii/encyclicals/documents/hf_jp-ii_enc_14091981_laborem-exercens_en.html

Change Management in Dynamic Health Care System

The health care management is concerned with the necessary changes in the internal settings. It is noted that the changes in the health care centre often include several complex situations. It is not easy to facilitate any changes without managing the internal associates. Hence, while undertaking any change management, it is required to pay the attention towards proper planning, evaluating, and implementation of the operations (Grol et al. 2013). The study will be discussing the change management process undertaken by the authority of Canberra hospital in Australia. The change management theory will be applied to the discussion in order to understand the requirement of changes. Accordingly, the study will be focusing on the major concerns associated with the change management process. Canberra Hospital in Australia is renowned for an acute care teaching hospital that includes almost 600 beds and a referral centre for specialist services. This community-based hospital is considered as the largest public care hospital in the region. Canberra Hospital is registered under World Health Organisation and accredited by the Australian Council in Healthcare Standards (Health.act.gov.au, 2016). In this current scenario, it has been seen that the hospital has been facing the trouble with their poor data management system. It has been noticed that the records of thousands of patients have been compromised due to such poor data management process (Canberratimes.com.au, 2016). Hence, the authority needs to pay attention in fixing up such issues by undertaking the proper change management procedures. Dr. Cooper has provided the evidence to the Assembly’s Public Accounts committee regarding the recognisable record manipulation in the hospital. Therefore, the changes in the organisational management have become essential to secure the reputation of Canberra Hospital. The study will be concentrating on such issues associated with the internal management of Canberra Hospital and will be recognising the proper changes that are needed to be undertaken accordingly. The organisational changes are needed to be undertaken in order to manage the situational incidents. In case of Canberra hospital the change management process is undertaken to improve the data management system that records the entire information of the organisation. However, there are two major factors responsible for driving the changes within the internal organisation scenario. These are as follows: The first and foremost factor for ensuring changes is the improvisation of the patient’s record management system. The hospital authority needs to keep the entire records of the patients that are necessary for the emergency purposes (Haas et al. 2013). Another factor for undertaking the change in such regards is to secure the hospital management from privacy breaching allegations. The lack of proper controls on the data management system in the Emergency Department is hampering the privacy of the information. In fact, the executive even admitted their inability to manage the records of the patients. In order to free the hospital from privacy breaching allegations, the change in the data management procedure is necessary (Richards, 2014). The privacy law in the health care centre is associated with the regulation that determines the protection of the private information of an individual (Herring, 2014).   Such information is needed to be stored in the private data management system of a health care centre. During some of the emergency scenario, the information can be extracted accordingly. However, Canberra Hospital is firmly alleged due to the poor data management system. The hospital executive even admitted the mess occurred due to the mismanagement of the private data. Hence, this declaration has created the significant impact on the privacy law in a health care setting. The policy and regulations associated with the privacy concerns are thus hampered accordingly. The change management process is linked with the theoretical perspectives, which considers the sequential process of implementing the changes. In such regards, the management of Canberra Hospital has applied Lewin’s Change Management Model. The founder, Kurt Lewin has described the three sequential steps to implement the changes. These steps are as follows. Unfreeze Stage: This particular stage is considered as the most important stage of change management model. The stage recognises the reason behind the changes that is needed to be undertaken (Hayes, 2014). For example, it has been seen that the management of Canberra Hospital is firmly alleged against the breaching of privacy laws. The poor data management system is the major reason behind such allegations. The authority has discovered such requirements and implemented the process of improvising the data management system. Such recognition falls under the â€Å"unfreeze† stage of the change management model. Figure 1: Kurt Lewin’s Change Management Model Change: Kurt Lewin has pointed out that ensuring change is not any event; rather it determines the sequential process. However, the second stage of change management model ensures the transition period. The management will be undertaking the changes by identifying the requirements. It is important to note that during such period, it becomes difficult to the authority to manage the people associated with such change (Shaw, 2015). For instance, the management needs to improvise the data storage for keeping the records safe. The use of the highly advanced technologies is required. It is not an easy process to manage the associated employees who are not aware of the process of using such technologies. In such cases, the good leadership is necessary. The proper training and development session provided to the associates will be helpful enough to facilitate such changes. Freezing Stage: The freezing stage is concerning the maintenance of the stability after the change is implemented. When the management of Canberra Hospital is improvising the data management system, it is required to pay the attentions on the consistency. It will be helpful enough in preventing the situation from occurring in the future. Concentrating on such theoretical perspectives, the sequential change can be implemented. The study is recognising the reasons for implementing the changes in a health care management scenario. Canberra Hospital is alleged due to the poor data management system, which drives against the privacy breaching laws. Kurt Lewin’s Change Management Model has been applied to facilitate such changes in the internal organisational scenario. Following such sequential stages, the management of Canberra Hospital will be able to secure the organisational reputation in a significant manner. Canberratimes.com.au, (2016). Data doctoring sparks hospital records privacy concerns. [online] Canberra Times. Available at: [Accessed 26 Aug. 2016]. Grol, R., Wensing, M., Eccles, M., & Davis, D. (2013).  Improving patient care: the implementation of change in health care. John Wiley & Sons. Haas, L., Maryniuk, M., Beck, J., Cox, C. E., Duker, P., Edwards, L., ... & McLaughlin, S. (2013). National standards for diabetes self-management education and support.  Diabetes care,  36(Supplement 1), S100-S108. Hayes, J. (2014).  The theory and practice of change management. Palgrave Macmillan. Health.act.gov.au, (2016). About Canberra Hospital | ACT Health. [online] Health.act.gov.au. Available at: [Accessed 27 Aug. 2016]. Herring, J. (2014).  Medical law and ethics. Oxford University Press, USA. Richards, N. M. (2014). Why data privacy law is (mostly) constitutional.  Wm. & Mary L. Rev.,  56, 1501. Shaw, G., (2015). 4 change management models for your small business. National Leasing, pp.3-8. .com houses experts from all possible disciplines to help students in the best possible manner. Owing to our experts' extensive knowledge in their respective field, we are capable of providing subject-wise quality academic assistance such as marketing assignment help , mechanical engineering assignment help , English assignment help , taxation assignment help , electrical assignment help , etc. You are required to write a researched argument essay that convinces persuades the reader of your position / stance. This is an academic, researched and referenced do... Executive Summary The purpose of this report is to elaborate the factors which are considered by individuals before selecting an occupation. Choosing an occupati... 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Free Trade and Fair Trade Essay Example | Topics and Well Written Essays - 750 words

Free Trade and Fair Trade - Essay Example This unequivocal position, he views any and all tariffs as anathema to the enjoyment of the benefits of free trade, and an injustice to the consumer who deserves access to the best valued goods and services at the most economical prices. Milton believes that the consumer’s interest is paramount, and any other policy consideration inconsistent-valued his interest is distortionary. An interesting assertion in the article is the principle attributed by Friedman to Adam Smith, that citizens from a nation benefit from importing as much as it can and exporting as little as possible. Friedman interprets this as getting as much value as possible with deploying as little, thus accumulating value within the country’s borders. Fried Fair Trade. Stiglitz and Charlton proceed on the premise that trade can be a positive force for development. However, it is their position that liberalization should be carefully managed. The position of Stiglitz and Charlton is that the Washington Con sensus prescribed developing countries to expeditiously adopt a system of reduced tariffs and trade barriers, entailed unforeseen cost to these countries in what amounted to the unwarranted rapid and indiscriminate liberalization of their markets. The undue haste and lack of careful stewardship in the adoption of free trade policies have resulted to an unfair advantage on the part of developed countries. For instance, after the Uruguay Round, developed countries came away with a disproportionately greater part of the gains particularly on the issues of the reduction of textile protection and of tariff and subsidy reduction on agricultural goods. This left developing countries at a gross disadvantage for which they met succeeding trade negotiations with much less enthusiasm and volition.

European Law Paper Essay Example | Topics and Well Written Essays - 1000 words

European Law Paper - Essay Example Moreover, by virtue of Section 6(3) any person born in Ireland becomes an Irish citizen if that person does not have the right to citizenship elsewhere. Pursuant to Section 6(1) and (3), the Irish authorities approved an Irish passport for Catherine in September 2000. Since the UK no longer applies the doctrine of jus soli (recognition of the citizenship conferred by any of its territories), Catherine was not automatically entitled to be recognized as a national of the UK under the British Nationality Act 1981. The facts reveal that Mrs. Chen went to Ireland for the purpose of enabling Catherine (the child she was pregnant with at the time) to become a citizen of Ireland and to therefore permit her to take up residence within the UK with Catherine. The court at first instance determined that Ireland is a part of the Common Travel Area under the Immigration Acts. As such Catherine as opposed to Mrs. Chen is entitled to move around the UK and in Ireland as she chooses to. However, Mrs. Chen and Catherine did not have the right to live in the UK under UK law. The Secretary of State for the Home Department denied an application for a permit to reside in the UK to Mrs. Chen and Catherine on the grounds that Catherine who was an infant was not asserting EC Treaty rights pursuant to Regulation 5(1) of the EEA Regulations and Mrs. Chen does not have a right to live in the UK pursuant to Regulation 5(1) of the EEA. Mrs. Chen appealed this decision to the Immigration Appellate Authority. The Appellate Authority ordered a stay of the appeal until such time as a reference to the Court of Justice could be determined. The questions referred to the Court of Justice generally asked for a determination of whether or not Directive 73/148, Direction 90/364 or Article 18 of EC Treaty read together with Articles 8 and 14 of the European Convention on Human Rights

Grief, Loss, and Finding Meaning and Purpose Essay Example for Free

Grief, Loss, and Finding Meaning and Purpose Essay Death is something that is out of human’s control, and it can produce all kind of feelings, and attitudes. The following paper discusses critical issues associated with understanding and facing death. There are various feelings and emotions that a person can experience after they loss someone special in their lives. Through out this paper we will try to identify, express, and find what had been discovered through out grief, and loss. There are several major issues associated with death, but we will focus only on two of them. For instance when a person is facing death, that person would experience denial, isolation, anger, bargaining, depression and acceptance; but the two major factors that will be discussed on this paper are depression and anger. According to the Merriam-Western Dictionary Death is the act of dying, the end of life, and there are several ways of coping with the emotional reaction when facing death. We all experience many losses through our lives, and when the loss is the death of someone really close to us, someone who we love and care about—perhaps a family member, a coworker, neighbor etc. That loss can cause a grieving process that can surely affect the way se see things and continue our lives. One of the issues associates with understanding coping and facing death is anger. Lets say for instance that if the cause of death of a family member was something unexpected, anger feelings can take control over that person. Anger is a wide range of emotions, is a strong feeling of displeasure, and belligerence aroused by a wrong, wrath, ire. (Dictionary.com). On the other hand, when facing an early death of a love one, the dominant feeling present on the rest of the family is anger, leading them to a bitter indignation at having been experience the unfairly death of one of their family members. The anger of a person who is experiencing a loss, can be targeted many things, or persons—perhaps anger at God for allowing that situation, anger over what seems unfairly and unjust. Another issue associated with understanding, coping, and facing death is depression. Individuals who are depressed use to isolate or withdraw them selves, they feel hope less and they are not ready to go back to their usual activities; they feel hopeless. A person’s attitude, beliefs, and values about death are according to  his/her cultural influence, and this will contribute with the way they respond when facing death and grief. An individual’s culture would influence the way that individual will respond when phasing death. Culture can influence a person on the way they perform the ceremonies or rituals when grieving. For instance in some countries, when a child died the parents are allow to bath and dress the child with their own cloths, when in different countries it is not permitted even to cry. These two different ceremonies show the different ritual people have according with their culture, values and beliefs. Finding meaning and purpose can be part of the grief process for those who faced a loss. Even though is not an easy process, that crisis can be turn into an opportunity to find true meaning. Many people can grow through grief, and learn to appreciate the value of life, and become better persons. In many cases the grieving process can be an opportunity to unify the family who is suffering. There is always family issues that could separate a family, but the death of a member can be an opportunity to reunite that family, and that is when meaning and purpose take place in the grief process. Grief and loss are universal, and it cannot be controlled by any human kind. The stage of grief and loss occurs in respond to the death of a value person—emotions and attitudes take control of those who are facing it. Loss is an unavoidable part of life, and grief is the healing process of those wounds that a loss could leave an in an individual’s life. References Kubler-Ross, E. Death: The Final Stage of Growth. New York: Prentice-Hall, 1975. http://cogprints.org/9155/ Developmental theory. (2006). In Elseviers dictionary of psychological theories. Retrieved from http://library.gcu.edu:2048/login?qurl=http%3A%2F%2Fsearch.credoreference.com.library.gcu.edu%3A2048%2Fcontent%2Fentry%2Festpsyctheory%2Fdevelopmental_theory%2F0

Virtual Communities are an Illusion :: Exploratory Essays Research Papers

Virtual Communities are an Illusion Discussions of the social effects of computer-mediated communication (CMC) and virtual community often focus on whether they pull people apart or bring them together. John Perry Barlow describes his point of view on this matter in a very enlightening article, Is There a There in Cyberspace?. Barlow first describes his skepticism about virtual communities and finishes the article with a life altering tragedy. Amy Bruckman, who is responsible for the article, Finding Ones Own in Cyberspace explains the importance of discovering a virtual community that best suits your needs. I feel that virtual communities and CMCs bring people together but also pull them apart more then together. In Barlows article, he describes how cyberspace has created its own community, or virtual community if you will, by bringing people together with common interests and experiences. Like the community in contemporary America, virtual communities had a place where peoples hearts remained even if they physically moved around the country. The virtual community also provides a feeling of comfort from this large support group-like place where tragedies one may encounter, are experienced throughout and are solved by all. When Barlow experienced the sudden death of his wife, he had this to say about his virtual community, Those strangers, who had no arms to put around my shoulders, no eyes to weep with mine, nevertheless saw me through. As neighbors do. This is the idea of a coming together, from a virtual community standpoint. One thing that Barlow points out about virtual communities is that they lack prana (the Hindu term for breath and spirit). He says, Prana is, to my mind, the literally vital element in the holy and unseen ecology of relationship...It is at the heart of the fundamental and profound difference between information and experience. This is what brings human relationships together. The body language, sex, tone of voice, smells, facial expressions, etc. are the things that make life, life! These missing ingredients still lack in virtual communities to this day. According to Bruckmans article, she explains how to find a virtual community that best suits ones needs. Some of the things she suggests for a virtual community can be easily correlated to finding a neighborhood where one would like to reside. The main determining factor she points out is self selection. As individuals, we know what we want/dont want, like/dislike, so the decision is up to us to decide where we want to go.

Oten Notes Engineering Studies Aeronautical Module

Gill Sans Bold Engineering Studies HSC Course Stage 6 Aeronautical engineering ES/S6 – HSC 41097 P0022161 Acknowledgments This publication is copyright Learning Materials Production, Open Training and Education Network – Distance Education, NSW Department of Education and Training, however it may contain material from other sources which is not owned by Learning Materials Production. Learning Materials Production would like to acknowledge the following people and organisations whose material has been used. Board of Studies, NSW Hawker de Havilland Page Aircraft Company Pty Ltd Bankstown Airport Padstow Aeroskills CentreAll reasonable efforts have been made to obtain copyright permissions. All claims will be settled in good faith. Materials devlopment: Paul Soares, Harry Taylor, Ian Webster Coordination: Jeff Appleby Content edit: John Cook, Josephine Wilms Illustrations: Tom Brown, Barbara Buining DTP: Nick Loutkovsky, Carolina Barbieri Copyright in this material is res erved to the Crown in the right of the State of New South Wales. Reproduction or transmittal in whole, or in part, other than in accordance with provisions of the Copyright Act, is prohibited without the written authority of Learning Materials Production. Learning Materials Production, Open Training and Education Network – Distance Education, NSW Department of Education and Training, 2000. 51 Wentworth Rd. Strathfield NSW 2135. Revised 2001 Module contents Subject overview †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. iii Module overview†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. vii Module components †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â ‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. vii Module outcomes †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ x Indicative time †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ x Resource requirements†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. xi Icons †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. xiii Glossary†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ xv Directive terms†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ xix Part 1: Aeronautical engineering – scope of the profession and engineering report†¦Ã¢â‚¬ ¦. 1–65 Part 2: Aeronautical engineering – istory of flight†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 1–37 Part 3: Aeronautical engineering – mechanics and hydraulics †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 1–73 Part 4: Aeronautical engineering – materials †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 1–49 Part 5: Aeronautical engineering – communication †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 1–44 Bibliography†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 45 Module evaluation †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 9 i ii Subject overview Engineering Studies Preliminary Course Household appliances examines common appliances found in the home. Simple appliances are analysed to identify materials and their applications. Electrical principles, researching methods and techniques to communicate technical information are introduced. The first student engineering report is completed undertaking an investigation of materials used in a household appliance. Landscape products investigates engineering principles by focusing on common products, such as lawnmowers and clothes hoists. The historical development of these types of products demonstrates he effect materials development and technological advancements have on the design of products. Engineering techniques of force analysis are described. Orthogonal drawing methods are explained. An engineering report is completed that analyses lawnmower components. Braking systems uses braking components and systems to describe engineering principles. The historical changes in materials and design are investigated. The relationship between internal structure of iron and steel and the resulting engineering properties of those materials is detailed. Hydraulic principles are described and examples provided in braking systems. Orthogonal drawing echniques are further developed. An engineering report is completed that requires an analysis of a braking system component. iii Bio-engineering both engineering principles and also the scope of the bio-engineering profession. Careers and current issues in this field are explored. Engineers as managers and ethical issues confronted by the bio engineer are considered. An engineering report is completed that investigates a current bioengineered product and describes the related issues that the bio-engineer would need to consider before, during and after this product development. Irrigation systems is the elective topic for the reliminary modules. The historical development of irrigation systems is described and the impact of these systems on society discussed. Hydraulic analysis of irrigation systems is explained. The effect on irrigation product range that has occurred with the introduction of is detailed. An engineering report on an irrigation system is completed. iv HSC Engineering Studies modules Civil structures examines engineering principles as the y relate to civil structures, such as bridges and buildings. The historical influences of engineering, the impact of engineering innovation, and environmental implications are discussed with eference to bridges. Mechanical analysis of bridges is used to introduce concepts of truss analysis and stress/strain. Material properties and application are explained with reference to a variety of civil structures. Technical communication skills described in this module include assembly drawing. The engineering report requires a comparison of two engineering solutions to solve the same engineering situation. Personal and public transport uses bicycles, motor vehicles and trains as examples to explain engineering concepts. The historical development of cars is used to demonstrate the developing material ist available for the engineer. The impact on society of these developments is discussed. The mechanical analysis of mechanisms involves the effect of friction. Energy and power relationships a re explained. Methods of testing materials, and modifying material properties are examined. A series of industrial manufacturing processes is described. Electrical concepts, such as power distribution, are detailed are introduced. The use of freehand technical sketches. Lifting devices investigates the social impact that devices raging from complex cranes to simple car jacks, have had on our society. The mechanical oncepts are explained, including the hydraulic concepts often used in lifting apparatus. The industrial processes used to form metals and the methods used to control physical properties are explained. Electrical requirements for many devices are detailed. The technical rules for sectioned orthogonal drawings are demonstrated. The engineering report is based on a comparison of two lifting devices. v Aeronautical engineering explores the scope of the aeronautical engineering profession. Career opportunities are considered, as well as ethical issues related to the profession . Technologies unique to this engineering field are described.Mechanical analysis includes aeronautical flight principles and fluid mechanics. Materials and material processes concentrate on their application to aeronautics. The corrosion process is explained and preventative techniques listed. Communicating technical information using both freehand and computer-aided drawing is required. The engineering report is based on the aeronautical profession, current projects and issues. Telecommunications engineering examines the history and impact on society of this field. Ethical issues and current technologies are described. The materials section concentrates on specialised esting, copper and its alloys, semiconductors and fibre optics. Electronic systems such as analogue and digital are explained and an overview of a variety of other technologies in this field is presented. Analysis, related to telecommunication products, is used to reinforce mechanical concepts. Communicating technica l information using both freehand and computer-aided drawing is required. The engineering report is based on the telecommunication profession, current projects and issues. Figure 0. 1 Modules vi Module overview Aeronautical engineering is the first focus engineering module in the HSC course.The scope of the aeronautical engineering profession is investigated. Career opportunities are considered, as well as ethical issues related to the profession. Technologies unique to this engineering field are described. The mechanical analysis topics include aeronautical flight principles and fluid mechanics. Materials, and material processes concentrate on those most associated with the aeronautical engineer. The corrosion process is explained and preventative techniques listed. Communicating technical information using both freehand and computer aided drawing are required. The engineering report is based on the aeronautical rofession, current projects and issues. Module components Each module contains three components, the preliminary pages, the teaching/learning section and additional resources. †¢ The preliminary pages include: – module contents – subject overview – module overview – icons – glossary – directive terms. Figure 0. 2 Preliminary pages vii †¢ The teaching/learning parts may include: – part contents – introduction – teaching/learning text and tasks – exercises – check list. Figure 0. 3 Teaching/learning section †¢ The additional information may include: – module appendix – bibliography – Additional resource module evaluation. Figure 0. 4 Additional materials Support materials such as audiotapes, video cassettes and computer disks will sometimes accompany a module. viii Module outcomes At the end of this module, you should be working towards being able to: †¢ describe the scope of engineering and critically analyse current innovations (H1. 1) †¢ differentiate between properties of materials and justify the selection of materials, components and processes in engineering (H1. 2) †¢ analyse and synthesise engineering applications in specific fields and report on the importance of these to society (H2. 2) †¢ se appropriate written, oral and presentation skills in the preparation of detailed engineering reports (H3. 2) †¢ investigate the extent of technological change in engineering (H4. 1) †¢ appreciate social, environmental and cultural implications of technological change in engineering and apply them to the analysis of specific problems (H4. 3) †¢ select and use appropriate management and planning skills related to engineering (H5. 2) †¢ demonstrate skills in analysis, synthesis and experimentation related to engineering (H6. 2) Extract from Stage 6 Engineering Studies Syllabus,  © Board of Studies, NSW, 1999.Refer to for original and current documents. ix Indicative time The Prelimin ary course is 120 hours (indicative time) and the HSC course is 120 hours (indicative time). The following table shows the approximate amount of time you should spend on this module. Preliminary modules Percentage of time Approximate number of hours Household appliances 20% 24 hr Landscape products 20% 24 hr Braking systems 20% 24 hr Bio-engineering 20% 24 hr Elective: Irrigation systems 20% 24 hr HSC modules Percentage of time Approximate number of hours Civil structures 20% 24 hr Personal and public transport 20% 24 hr Lifting devices 0% 24 hr Aeronautical engineering 20% 24 hr Telecommunications engineering 20% 24 hr There are five parts in Aeronautical engineering. Each part will require about four to five hours of work. You should aim to complete the module within 20 to 25 hours. x Resource requirements During this module you will need to access a range of resources including: †¢ technical drawing equipment – drawing board, tee square, set squares (30? , 60? , 45? ) , protractor, pencils (0. 5 mm mechanical pencil with B lead), eraser, pair of compasses, pair of dividers †¢ calculator †¢ rule †¢ thumb tack or pin †¢ small sheet of thin cardboard pair of scissors †¢ cotton reel. xi xii Icons As you work through this module you will see symbols known as icons. The purpose of these icons is to gain your attention and to indicate particular types of tasks you need to complete in this module. The list below shows the icons and outlines the types of tasks for Stage 6 Engineering studies. Computer This icon indicates tasks such as researching using an electronic database or calculating using a spreadsheet. Danger This icon indicates tasks which may present a danger and to proceed with care. Discuss This icon indicates tasks such as discussing a point or ebating an issue. Examine This icon indicates tasks such as reading an article or watching a video. Hands on This icon indicates tasks such as collecting data or conducting exp eriments. Respond This icon indicates the need to write a response or draw an object. Think This icon indicates tasks such as reflecting on your experience or picturing yourself in a situation. xiii Return This icon indicates exercises for you to return to your teacher when you have completed the part. (OTEN OLP students will need to refer to their Learner's Guide for instructions on which exercises to return). xiv GlossaryAs you work through the module you will encounter a range of terms that have specific meanings. The first time a term occurs in the text it will appear in bold. The list below explains the terms you will encounter in this module. aerofoil any surface such as a wing, aileron, or stabiliser, designed to help in lifting or controlling an aircraft aileron special purpose hinged flap on the rear edge of a wing designed to control sideways balance autogyro early form of helicopter with a propeller and freely rotating horizontal vanes biplane aeroplane with two sets of w ings, one above the other cambered arched or curved upwards in the middle oncurrent passing through the same point, foe example, a number of forces are concurrent if an extension of the lines representing their directions all cross at the same point cowling removable cover on aircraft engine drag the force, due to the relative airflow, exerted on an aeroplane and tending to reduce its forward motion elevator a hinged, horizontal surface on an aeroplane, generally located at the tail end of the fuselage and used to control the forward/backward tilt empirical data information from experience or experiment, not from any scientific or theoretical deduction fatigue the condition of having experienced many cycles or epeated applications of stress that is lower than would normally be required to cause failure, but can cause failure under these conditions flap hinged or sliding section on the rear edge of a wing designed to control lift xv fuselage gyro gyroscopic device for keeping an obje ct, such as a rocket, in stable controlled flight ICBM missile designed to deliver a warhead from one continent to another interplanetary between planets, from planet to planet Mach 5 A speed that is five times the speed of sound at the particular altitude (the speed of sound at sea level is approximately 380 meters per second or 1370 kmph) oment a force that tends to cause rotation because the object is fixed in position at one point or because the force is not applied at the centre of gravity monoplane aeroplane with one set of wings nacelle outer casing of an aeroplane’s engine orbit path of one body around another body under the influence of gravity payload weight being carried pitch angle that a propeller or rotor blade makes with the air passing over it pressurisation increasing the air pressure in an aircraft cabin as altitude increases and the air pressure outside is too low for breathing radar radio distance and ranging – an instrument to allow light when ther e is no visibility retrofit to incorporate new parts and changes into old models riveting a method for joining solid sheet materials to a firm support rotors the rotating blades on a helicopter that act as propeller and wing rudder broad flat wooden or metal piece hinged to the rear of an aeroplane for steering satellite a body revolving in some fixed path around another body shot xvi body of aeroplane Consists of small pellets; in shot-peening these are ‘fired’ onto a surface spar a stout pole such as those used for masts or booms etc on a boat. Also the main member of the wing frame in an aeroplane stall hen an aircraft loses lift, usually due to loss of relative air speed, and is in danger of falling streamlined made to a shape calculated to cause the least resistance to motion supercharger a device to force air into an aeroplane engine with pressure to overcome the reduction in atmospheric pressure at high altitudes and so maintain engine power as the aircraft climb s triplane an aeroplane with three sets of wings arranged one above the other wind tunnel a box or tube designed to drive a moving stream of air around an object or a scaled model of the object within it to determine the behaviour of the object in an airstream aw the motion of an aircraft about it's vertical axis xvii xviii Directive terms The list below explains key words you will encounter in assessment tasks and examination questions. account account for: state reasons for, report on; give an account of: narrate a series of events or transactions analyse identify components and the relationship between them, draw out and relate implications apply use, utilise, employ in a particular situation appreciate make a judgement about the value of assess make a judgement of value, quality, outcomes, results or size calculate ascertain/determine from given facts, figures or information larify make clear or plain classify arrange or include in classes/categories compare show how things are similar or different construct make, build, put together items or arguments contrast show how things are different or opposite critically (analyse/evaluate) add a degree or level of accuracy, depth, knowledge and understanding, logic, questioning, reflection and quality to (analysis/evaluation) deduce draw conclusions define state meaning and identify essential qualities demonstrate show by example xix describe provide characteristics and features discuss identify issues and provide points for and/or against distinguish ecognise or note/indicate as being distinct or different from; to note differences between evaluate make a judgement based on criteria; determine the value of examine inquire into explain relate cause and effect; make the relationships between things evident; provide why and/or how extract choose relevant and/or appropriate details extrapolate infer from what is known identify recognise and name interpret draw meaning from investigate plan, inquire into and draw conc lusions about justify support an argument or conclusion outline sketch in general terms; indicate the main features of predict suggest what may happen based on available nformation propose put forward (for example a point of view, idea, argument, suggestion) for consideration or action recall present remembered ideas, facts or experiences recommend provide reasons in favour recount retell a series of events summarise express, concisely, the relevant details synthesise putting together various elements to make a whole Extract from The New Higher School Certificate Assessment Support Document,  © Board of Studies, NSW, 1999. Refer to for original and current documents. xx Aeronautical engineering Part 1: Aeronautical engineering – scope of the profession & engineering reportPart 1 contents Introduction†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢ € ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 2 What will you learn?†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 2 Scope of aeronautical engineering†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 3 Unique technologies in aeronautical engineering †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 10 Current projects or innovations†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 26 Health and safety issues †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 31 Training for the profession†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 5 Careers in aeronautical engineering†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 37 Relations with the community †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 40 Legal and ethical issues†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 45 Engineers as managers †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 46 The engineering report †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 49 Structure of a focus engineering report †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 49 Sample engineering report †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â ‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 51Exercise sheet †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 61 Progress check †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 63 Exercise cover sheet†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 65 Part 1: Aeronautical engineering – scope and engineering report 1 Arial Arial bold Introduction The purpose of this part is to introduce you to the scope and nature of the aeronautical engineering profession. What will you learn? You will learn about: †¢ the nature and scope of the aeronautical engineering profession †¢ current projects and innova tions health and safety issues †¢ training for the profession †¢ career prospects †¢ unique technologies in the profession †¢ legal and ethical implications †¢ engineers as managers †¢ relations with the community. You will learn to: †¢ define the responsibilities of the aeronautical engineer †¢ describe the nature of work done in this profession †¢ examine projects and innovations from within the aeronautical profession †¢ analyse the training and career prospects within aeronautical engineering. Extract from Stage 6 Engineering Studies Syllabus,  © Board of Studies, NSW, 1999. Refer to for original and current documents. 2Aeronautical engineering Scope  of  aeronautical  engineering Today, you would pay little attention to the sound of an over-flying aircraft, that is, if you noticed it at all. Yet less than ninety years ago everyone around you would have looked skyward and wondered in awe at the sight. The aircraft of 90 y ears ago was not the sophisticated unit that you may see in the sky today. They were a combination of timber, wire, fabric and a crude engine or two, flown on a ‘wing and a prayer’. The designers of these aircraft were not aeronautical engineers as such. More often than not they were scientists or enthusiastic amateurs.The little knowledge they did possess was the collected result of a variety of experiments with kites and models conducted during the late 1800s and early 1900s. Often the over enthusiastic and over confident experimenters piloted their less than airworthy designs to an early grave. Could this have been a form of natural selection? Many early workers used the empirical data collected from these many failures and a few successes to develop the first working aircraft. This was not always done with reference to pure theory and equations. Basically the cambered wing at a suitable angle of attack appeared to give good lift.Consequently many aircraft experiment ers chose to concentrate on the cambered wing and other ideas that ‘seemed to be a good idea at the time’. However, scientists such as Dr Lancaster had developed and confirmed mathematical theories for phenomena such as lift generation and induced drag well before the Wright Brothers first flew an aircraft. Today’s aeronautical engineers still use models. The test pilot still has to be the first person to pilot the aircraft. However, the Concord and the FA 18 Hornet, could not be designed without extensive reference to aeronautical theory and use of sophisticated calculation.The test pilot will have already flown many hours in a flight simulator which emulates the predicted in-flight characteristics of the new aircraft. This then is the domain of the aeronautical engineer. Part 1: Aeronautical engineering – scope and engineering report 3 Arial Arial bold List the general areas of knowledge that you think a team of aeronautical engineers would need to posse ss to design and build a complete aircraft. __________________________________________________________ __________________________________________________________ __________________________________________________________ _________________________________________________________ Did you answer? †¢ aerodynamics †¢ electrical and electronic systems †¢ materials technology †¢ hydraulics †¢ fuel engines and propulsion systems †¢ structural mechanics †¢ drawing and drafting skills. Before venturing further into the day to day complexities of being an aeronautical engineer you should take a step back to consider the aircraft as an engineered system. Aerodynamics An aircraft is not just a wing with a powerful jet engine strapped to it. Moreover it is the product of a combined effort by hundreds of individual designers and engineers working toward a common goal.As aircraft grow more sophisticated no one person can fully understand every detail that goes int o an aircraft’s design. An aircraft before all other considerations is an aerodynamic entity. It is held aloft by the lift forces generated by the camber and angle of attack of the wing. It is restrained by drag forces created by form and shape of the aircraft and induced through the process of generating lift. The everpresent pull of gravity will eventually pull all aircraft back to earth. The movement of air around an aircraft is a complex thing to understand and at times it is difficult to predict.Aerodynamic theory helps predict the movement of air and the amount of lift generated but it is only a starting point. 4 Aeronautical engineering Aerodynamics is a major concern of aeronautical engineers but there are other equally important aspects to the profession. Reel tricky You will need: †¢ a thumb tack or pin from the sewing cabinet †¢ a small sheet of thin cardboard †¢ a drawing compass and a pair of scissors. †¢ a cotton reel from the same place that you found the pin. Carry out the following steps: 1 draw an 80 mm diameter circle on the cardboard, then cut out the circle using the scissors 2 ush the thumb tack or pin through the center of the cardboard disc so that the pointy end goes through as far as it can go 3 pick up the cotton reel, place the pointy end of the tack or pin into the hole on the bottom side of the cotton reel and hold the disk in place with your finger 4 blow through the top of the cotton reel and let go of the disk while you are still blowing. Blow Cotton reel Pin Cardboard disk Figure 1. 1 The disk on the cotton reel trick Part 1: Aeronautical engineering – scope and engineering report 5 Arial Arial bold The disk should have remained in position until you stopped blowing.When you stopped blowing the disk should have fallen down. Explain why the disk behaved the way it did. __________________________________________________________ __________________________________________________________ _________ _________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ _________________________________________________________ Did you answer? Air moving over the disk had velocity and therefore a dynamic pressure component. Benoulli’s predictions on total pressure would indicate that the static pressure above the disk in the moving air would therefore be lower than the pressure below the disk in still air, therefore the disk experiences ‘lift’. (The disk is pushed upwards by the higher pressure beneath it. ) 6 Aeronautical engineering Propulsion systems An aircraft requires a propulsion system to provide thrust (or in the case of a g lider, a launching system to get it into the air in the first place).An engineer will have to decide the best combination of engine and thrust device to attach to an aircraft. Identify engine types and thrust devices that are used on new or old aircraft. __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ Did you answer? Some of the engine types and thrust devices you may have identified include; internal combustion engine, jet engine, turbine, radial, propeller, fan, rotor and rocket.You will hear more of propulsion systems in the mechanics and hydraulics part of this module. Stress-n-Strain Aeronautical engineers who design superbly aerodynamic aircraft that crash and burn because the wings fall off will not lead a successful career. The aeronautical engineer has to calculate and consider the forces present in all components of the aircraft. They then have to predict whether the material that the components are manufactured from will sustain that load without failure. This prediction must be for the full service life of the aircraft.If a component is predicted to fail within the service life of the aircraft, the engineer will mandate when that component must be periodically replaced. The piston engines in light aircraft usually have a minor service after 100 hours operating time and a major service every 1000 hours operating time. A major service will involve a full strip-down of the engine. Many components, for example pistons, must be replaced whether or not they appear to be in serviceable condition. Other components will be subjected to testing. Part 1: Aeronautical engineering – scope and engineering report 7 Arial Arial boldMaterials Linked to considerations of structural forces are the consideration and selection of appropriate materials. An aeronautical engineer will need to have a good knowledge of the manufacturing and service properties of the materials used on aircraft. An aircraft operates in a harsh environment. During any flight an aircraft is subjected to constant vibration, to stresses due to turbulence, to cyclic pressurisation and depressurisation of the cabin, to moisture and to wide fluctuations of temperature. The temperature on the ground may be 36? C while at 38 000 feet it may be –60 °C.Materials selected must first be readily formed in the shapes required and must secondly be suited to the service conditions. Predict or identify any materials based problems that might occur due to the harsh environment that the aircraft is subject to. __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ Did you answer? †¢ brittleness at low tempe rature †¢ fatigue due to repeated cycles of stress crack propagation under high stresses, vibration, temperature changes †¢ corrosion due to continuous exposure to the elements †¢ failure under impact †¢ loss of strength at high temperature. Avionics and electrical Modern aircraft depend on many electronic systems to safely complete their flights. The flight deck instruments, navigation systems, the actuation of aerodynamic surfaces, the landing and autopilot systems are now controlled by electronics and micro-processor systems. The design and implementation of avionics is the realm of another engineer, the electrical or electronic engineer.The aeronautical engineer must however be aware of the impact of these systems when designing an aircraft. 8 Aeronautical engineering Control systems and hydraulics The control surfaces of aircraft; elevators, ailerons, rudders and flaps need to move in response to pilot inputs on the control column and rudder pedals. In light aircraft this is achieved using wires and rods. In large commercial jets this is done with hydraulic systems connected to electronic or hydraulic controllers. Cowl Cockpit/cabin Spinner Prop Wing tip Aileron Flaps Fuselage Tailplane Elevator Trim tab Fin and rudder Figure 1. Main parts on an aeroplane If you have access to the Internet visit this Sydney University web site is an excellent source for additional aeronautics information (accessed 30. 10. 01). Part 1: Aeronautical engineering – scope and engineering report 9 Arial Arial bold Unique technologies in aeronautical engineering Many of the technologies found in the aeronautical engineering profession are not unique in the sense that they are solely found and used in this discipline. The technologies used by the aeronautics industry are also found in industries that deal with similar problems and issues.For instance, if you were to design a high technology, 18 foot racing skiff, you would need to consider and use many of the technologies available in the aeronautics industry, excluding perhaps the requirement for the vessel to fly. Can you identify any technologies that you believe overlap between aeronautics and boat-building industries? Consider the major areas of emphasis in this course; history, materials, mechanics and communication. List the technologies that you believe overlap between the aircraft industry and the construction of high tech boats. __________________________________________________________ _________________________________________________________ __________________________________________________________ __________________________________________________________ Did you answer? †¢ materials – such as graphite and kevlar and aluminium alloys †¢ computerised design and drawing systems †¢ wind tunnel testing of airframes and sails †¢ computerised calculation systems. Aircraft design Aircraft design is primarily concerned with flight and how to achiev e this condition safely and efficiently. Basically an aircraft must be aerodynamically sound – have lots of lift and minimal drag.The aircraft must also be as light as possible to maximize its payload and to allow it to get off the ground in the first place. The materials must be suited to the operating conditions and the environment and remain in good condition for the expected service life of the aircraft. 10 Aeronautical engineering The aircraft must also be structurally sound. The stresses in the components must not exceed the component's safe working limits. Nothing ruins a pilot’s day more than having the wings fold up in a tight turn! Finally, aircraft components are often sourced from manufacturers from all over the world.To ensure that it all goes together when all the parts arrive, very accurate and detailed drawings are required by each component manufacturer. These have to be drawn to internationally accepted standards. So, you ask, what has all this got to do with weekend sailors and flimsy boats? Skiff design A sailing skiff, aside from any other considerations, must use wind and air to drive it. A close inspection of a sail in operation will reveal that the sail is in fact a curved aerofoil not a flat sheet of sailcloth. You would notice this particularly on the sail of a windsurfer.The sail develops lift just as does the wing of an aircraft. The hull of the skiff moves through a fluid that you refer to as water. A badly designed hull generates a large amount of drag that slows the skiff down. The skipper usually comments loudly about this situation as better-designed skiffs race past on their way to the finish line. Many designers of modern racing skiffs use sophisticated fluid dynamics software to assist in designing both hull and sails. Similarly, these same designers are concerned with the two competing virtues of low weight and structural strength.In Auckland, in 1995, the America’s cup challenger ‘One Australiaâ €™ broke into two reasonably large but none-the-less rapidly sinking pieces. This was a perfect example of poor strength to weight analysis. Put simply, the structural forces imposed on the hull exceeded the strength of the hull material. The designer sacrificed strength to obtain a lighter hull and paid the price. The strength and modulus of light weight materials such as marine and aircraft grade aluminium, carbon fibre composites and Kevlar are compared to complex mechanical analyses of the hull, spar and sail design. Again software solutions exist and are utilized.The skiff’s final drawings and component shapes may be drawn by hand. Often the drawings are produced using common, off the shelf CAD programs or perhaps specialist lofting software designed for the marine industry. Part 1: Aeronautical engineering – scope and engineering report 11 Arial Arial bold As you can see, the technologies in two seemingly unrelated industries are similar in nature and do over lap. However, the aeronautical engineering profession is distinct in some very significant ways: †¢ The scale of operations and the shear complexity of the calculations involved in aeronautical engineering are infinitely greater. †¢The aircraft industry uses and often develops leading edge technology. Leading edge technology is usually very expensive. Industries such as the manufacturers of small boats tend to acquire this technology when it is more established and the cost of the new technology is more affordable. More about aeronautical engineering technologies You will now learn more about some of the leading edge technologies associated with the aircraft industry. The technologies tend to fall into two broad areas; those technologies used to design the aircraft, and those technologies associated with the materials manufacturing aspects of aircraft.Aircraft design technologies Throughout this course you have been involved in calculating forces, reactions, moments and st ress in two dimensions and only on flat or uniform surfaces. At times you may have considered the calculations a little difficult. Consider then the degree of difficulty that would be involved if you now had to calculate forces and moments in three dimensions, on curved surfaces with loads that fluctuated and using calculus that Extension 2 (4 Unit) mathematics does not cover. Does this conjure up an image in your mind?Now imagine applying similarly difficult calculations to more than a thousand points across a single wing. Are you now thinking that this is getting a little difficult? A modern jet aircraft may contain over a million individual components and someone has to draw each and every one of them. Again, just to make things difficult virtually every component is curved in some special and very critical way. Imagine the most difficult drawing that you have done so far in this course, then multiply the degree of difficulty by ten. Then repeat the drawing several thousand times . Starting to get the picture yet! 12Aeronautical engineering List some systems and products that exist to reduce the difficulty and complexity of designing modern jet aircraft. __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ Did you answer? One of the most significant is computerised design and calculation software. Others include ‘off the shelf’ systems for navigation, communication and cockpit management. The bad newsAll aeronautical engineers have to learn and understand how to do these difficult calculations. They have to use their brain, some mathematics and a calculator. Aspiring aeronautical engineers soon encounter the complexities of computational analysis (difficult mathematics). They will see a lot more calculation before their aeronautical engineering course finally ends. The good news There are software tools available to assist the engineer in the design process. To use these software tools effectively and correctly the engineer must first understand the underlying mathematics and theory on which these programs are based.That is, you must be able to understand and do the mathematics before using the program. You will now examine four common categories of aircraft design software: †¢ structural analysis software †¢ modeling software †¢ aerodynamic calculation software †¢ CAD software. Part 1: Aeronautical engineering – scope and engineering report 13 Arial Arial bold Structural analysis software The structural analysis of an aircraft is a complex problem. There are not many straight lines involved, virtually every component is curved, even the ones that look straight are usually curved. The loading is not uniform, it varies from point to point.In other words, the l oads and stresses will vary infinitely across the components being analysed. An infinite number of equations could take quite some time. The solution is really quite straight-forward. If an engineer intends to examine the forces, stresses and moments in an aircraft wing, the wing can be mathematically broken up into a large number of sections referred to as elements. The conditions in each element are then examined. The results from each element are combined together to produce a distribution of forces, stresses and moments across the wing. The number of elements considered in this procedure is finite.There is an upper limit to the number of elements to be analysed. This mathematical process is called ‘finite element analysis’. The industry abbreviates this to FEA. Finite element analysis is a very powerful tool but is very slow when done by hand. A very popular finite element software (FEA) package in the aircraft industry is called NASTRAN. This package falls into the category of a computer aided engineering software (CAE) tool. NASTRAN is a high end software tool for critical engineering applications. It is capable of stress, vibration, heat transfer, acoustic and aeroelastic analysis. If you have access to the Internet visit .Select the appropriate option from the software section of the directory to find out more about NASTRAN (accessed 06. 11. 01). Modeling software The production and testing of physical working models is a costly and time consuming activity. An activity that is closely related to finite element analysis is ‘finite element modeling’. In the aeronautical engineering industry ‘finite element modeling’ is abbreviated to FEM. Using finite element modeling software, an engineer can construct models using computer aided design (CAD) parts, submit the models for simulation and observe the behavior of the model under simulation.The results can be used to modify and improve the product designs to yield bette r performance and to better resist loads. A high end finite element modeling program that is commonly used in the aeronautical engineering industry is PATRAN. This product is 14 Aeronautical engineering produced by MSC, the same company that produces the analysis package NASTRAN. Figure 1. 3 was produced by the Page Aircraft Company Pty Ltd using the finite element modeling package PATRAN. This company is associated with the University of NSW and is currently developing a light aircraft that it hopes to put into full commercial production.You can find out more about PATRAN at . Figure 1. 3 A PATRAN generated image of an aircraft under development  © Reproduced with the permission of the Page Aircraft Company Pty Ltd Aerodynamic calculation and modeling software Aerodynamics is concerned primarily with the flow of air and the interaction of that air with objects that it encounters. Aeronautical engineers are usually concerned with the interaction of an aircraft’s outer surfa ces with the air through which the aircraft moves. ‘CFD' calculations can help to predict the lift and drag levels for a particular airframe as well as stall and other performance characteristics.Air is considered to be a fluid and the mathematical processes involved in predicting the behaviour of the air is called computational fluid Part 1: Aeronautical engineering – scope and engineering report 15 Arial Arial bold dynamics or CFD for short. The mathematics involved is complex but again there is software available which can carry out these calculations. Outline a practical way in which an aeronautical engineer could visualize the flow of air around an aircraft without using software. __________________________________________________________ _________________________________________________________ __________________________________________________________ __________________________________________________________ Did you answer? The flow of air around an aircraft can be observed using a wind tunnel where wind is pushed over a model with smoke streams passing over it. An industry standard software package commonly used by aeronautical engineers is VSAERO. This package allows an engineer to input the surface geometry of an aircraft. The surface geometry is simply the outside shape of the aircraft.The engineer can also input reference conditions such as velocity of the air, angle of attack of the wing and yaw. The package will then calculate and display the predicted behaviour of the air around the aircraft. If you have access to the Internet visit . Under products there is a graphic showing an image of the C-130, the Hercules transport aircraft used by the Australian military at present. Take a close look at what is happening to the wingtips (accessed 30. 10. 01). If you have access to the Internet visit to view a photograph of a real C-130 activating anti missile flares (accessed 30. 10. 1). Computer aided design The last type of software packag e that you need to learn about are the computer aided design (CAD) drawing packages. You’re probably familiar with one of the CAD packages available for use on personal computers. These include Autocad Light, Autosketch and TurboCAD. These packages vary in power and are fine for standard drawing applications such as architecture and medium scale manufacturing. The aeronautics industry uses specialist CAD packages which fit the industry’s need to produce drawings of complex surface shapes and 16 Aeronautical engineering curved components.They also use state of the art, multiple processor workstations with large screen monitors for speed and ease of viewing. The large monitors reduce eye-strain and allow more of each drawing to be displayed. CAD software packages currently used by many aeronautical engineering companies include CATIA and CADDS 5. The CATIA package is promoted as CAD/CAM/CAE package. CATIA can be used solely for drawing and designing. However, it can also be used for CAM (computer aided manufacturing) and CAE applications. If you have Internet access visit to find out more about CATIA (accessed 30. 10. 1). Figure 1. 4 Image produced by the Page Aircraft Company Pty Ltd using CATIA software. The aircraft shown is currently under development  © Reproduced with the permission of the Page Aircraft Company Pty Ltd Wind tunnels To this point all the development tools have been based on computer software. In the aerodynamic calculation and modeling section you were asked to suggest a method of assessing the aerodynamic behaviour of an aircraft without using computers. Many successful aircraft have been developed without the aid of modern computers. In fact the computer models are not perfect.The information provided by computer analysis is usually valid but does not exactly predict the behaviour of a real aircraft. Part 1: Aeronautical engineering – scope and engineering report 17 Arial Arial bold Why do you think this is so? ____ ______________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ Did you answer? Computer output is based on computational methods that have been programmed into the computer.These computational methods are based on theoretical analyses of conditions. Variables are input to reflect real situations and conditions as much as possible but can never predict the precise conditions that exist. Input into a computer is based on precise or perfect data, the behaviour of materials, fluids and the like is not necessarily perfect. The output from a computer program is based purely on the input. Another method of assessing an aircraft design is to construct a very accurate scale model then subject the model to wind tunnel testing.Wind tunnel testing does not exactly predict the behaviour of a real, fullsize aircraft flying in open air. However, when scale effect corrections are applied valid data can be obtained. Model boats on ponds do not behave like real ships, the forces and accelerations are all out of proportion. They bounce around like corks. Similarly model aircraft in wind tunnels do not behave like real aircraft. There are several reasons for this. It is difficult to make accurate models. The sides of the wind tunnel constrain the air-flow. Most seriously, the model is flown in full size air not ‘model size’ air.This is known as the scale effect. Larger size models in larger size wind tunnels give the most meaningful data. The most sophisticated wind tunnels actually compress the air at up to 25 atmospheres to correct for scale effect. Most aircraft design is based on both CFD and wind tunnel analysis. This is because neither system gives perfect results. The following photograph shows a model under test in a wind tunnel at the University of NSW. 18 Aeronautical engineering Figure 1. 5 A model aircraft being tested in a wind tunnel  © Reproduced with the permission of the Page Aircraft Company Pty LtdManufacturing technologies and systems unique to the aeronautics industry Aeronautical engineers also deal with materials and manufacturing processes that are highly specialized in their nature and could be considered unique. The materials used for aircraft manufacture need to possess very special manufacturing and service properties. List five properties which you believe are important for materials used in aircraft manufacture and construction. Give your reasons for each choice. Property Reason why it is important Part 1: Aeronautical engineering – scope and engineering report 19 Arial Arial bold Did you answer?Property Reason why it is important Low fatigue aircraft vibration can cause fatigue failures High strength to weight lower the overall weight Corrosion resistance resist harsh operating conditions Ductility (before forming) Provide for forming of c omplex shapes Elasticity allow the aircraft to flex Later, in the materials section of this module you will investigate the materials commonly used in the aircraft manufacturing industry. This section is more concerned with the technologies used when dealing with these materials. Advanced composite materials Two commonly used materials are aluminium and carbon fibre