Saturday, November 9, 2019
Writing a Term Paper
Writing a Term Paper Writing a Term Paper Writing a Term Paper Thus, you have to write a term paper and you do not know how to write it. Start with the preparation stage of term paper writing - write down term paper ideas you have on the topic.Ã You will find it easier to write a term paper if you build an outline first.Ã Think carefully about what you are going to write. Choose the topic which will be interesting for you and your reader. Decide on the purpose of your term paper writing. Whatever topic you choose, it must fit the academic purpose. Term paper may be descriptive, narrative, or propose solutions to problems. Term paper may be creative in the sense that the authors have an opportunity to explain their points of view creatively. Do not forget to include a thesis statement in the opening part of your term paper.Ã Thesis statement is a sentence that explicitly identifies the purpose of term paper writing or previews its main ideas. A thesis is the main idea, not the title. It must be a complete sentence that explains in some detail what the reader should expect to find in your term paper. You should include thesis in the first paragraph of your term paper. Term paper must consist of at least three paragraphs. While a two-paragraph term paper may be possible to write, most of the tutors expect to receive a term paper that has a clear introduction, detailed body, and logical conclusion.Ã The primary purpose of term paper writing is to thoroughly discuss the main idea. Term Paper Format Guidelines Term paper outline will help to write a good academic work. The introduction paragraph is the first paragraph of your term paper. It introduces the main idea of term paper writing. A good opening paragraph attracts the interest of your reader and tells why your topic is important. Write down a good thesis statement. Provide some background information about your topic. You should focus on interesting facts, quotations, or definitions of important terms you will use later in the term paper. Supporting paragraphs make up the main body of your term paper. They develop the main idea. Develop each supporting point into a detailed full paragraph.Ã You should use transition words to connect supporting paragraphs. Transition words link your paragraphs together and make your term paper easier to read. Use them at the beginning and end of your paragraphs. The summary paragraph comes at the end of your term paper after you have finished developing your ideas. The summary paragraph is a concl usion. It summarizes or restates the main idea of term paper writing. You want to leave the reader with a sense that your term paper is complete. Restate the strongest points of your term paper that support the main idea. Custom Written Term Papers You are welcome to ask our writers for term paper writing help if you are not sure how to write a good term paper by yourself. We are ready to help you with all steps of term paper writing and we guarantee high quality of every term paper delivers.Ã Entrust your assignment only to experienced writers!
Wednesday, November 6, 2019
Earth First vs. Headwaters essays
Earth First vs. Headwaters essays Earth First! is characterized as a radical environmental group by its enemies and as a necessary and militant group seeking to protect the environment from illegal use and predatory actions by big business by its supporters. The group has raised objections to one project in particular, the Headwaters project in Humboldt County in Northern California, bringing it into conflict not only with the Maxxam Corporation that is pushing this project and with various employees or potential employees of that company but also with the FBI, lading to several court cases either directed at Earth First! or undertaken by Earth First! in order to challenge the actions of Maxxam. A number of legal issues are raised in these court actions by both sides in the dispute. Headwaters Forest was acquired by Maxxam Corporation in 1986 in a leveraged buyout. Maxxam Corporation is headed by Texas financier Charles Hurwitz, and he greatly increased logging of ancient redwoods to reduce his takeover debt, which started a ten-year battle with Earth First! over what would happen to the forest. The forest in question includes six ancient groves of old-growth coastal redwoods covering approximately 6,000 acres. Also included is another 12,000 acres of old-growth trees. These have been selectively logged but are surrounded by a mixture of young forest, stream zones, and cut-over lands targeted by environmentalists for restoration. Groups like Earth First! became interested because there are good reasons The old-growth redwoods of Headwaters provide critical habitat for the endangered marbled murrelet, coho salmon, and other species. Only 150 years ago the redwood forests of Oregon and California covered two million acres; now less than four percent remain. The Clinton administration and the State of California have agreed to purchase two of ...
Monday, November 4, 2019
The story of DDT and Malaria (History Essay) Essay - 1
The story of DDT and Malaria (History ) - Essay Example At the end of World War II the technological advancements that were a product of the war began to filter into the commercial economy. The growing demand for food brought about the need for chemicals to grow, preserve, and package food products as agriculture moved from the family farm and into large-scale operations. This era witnessed the introduction of DDT at a time when its long-term effects were unknown, and in 1950 the US House of Representatives opened hearings to investigate the use of chemicals and additives to food products.3 In 1962 Rachel Carson wrote her landmark book Silent Spring, which brought about public scrutiny in regards to the safety of the fertilizer, insecticide, and pesticide programs that were being used in domestic agriculture. Since that time the US has escalated their drive to monitor the use of chemicals in the food chain and have maintained a policy of the evaluation and licensing the use of hazardous chemicals with the goal of creating safer consumer p roducts. While this policy has brought thousands of products under the scrutiny of the Environmental Protection Agency (EPA), DDT was one of the first and most visible victims of this program. During the 1950s the World Health Organization (WHO) pursued a policy of widespread use of DDT in Asia, Latin America, and Africa in an effort to eliminate the mosquitoes that transmitted the deadly disease of malaria. By 1971 the WHO estimated that as many as 1 billion people had been freed from the risk on contracting malaria.4 However, there were dangers lurking in the shadows of this success. Because there was a chance of the insects building up a resistance to DDT over time, it was necessary to spray the infected areas on a regular and diligent schedule. In addition, the WHO failed to account for several variables that worked against the program. Local bureaucratic governments failed to spray regularly, infected individuals imported the disease,
Saturday, November 2, 2019
Business Strategy Essay Example | Topics and Well Written Essays - 2000 words
Business Strategy - Essay Example Yahoo was founded by Jerry Yang and David Filo in 1994, mainly as a website which featured a directory of other websites. From that beginning, it spread its operations extensively, making strong presence in certain segments, but still lay behind Google in majority of the segments, as well as in relation to market share and revenue. Actually, in 2000, Yahoo and Google had a working association, with Yahoo using Google for search results. However that was short-lived, and both the companies parted ways and importantly started competing against each other in various segments. Porterââ¬â¢s ââ¬Ëfive forces frameworkââ¬â¢ Threat of Entrants Any industrial sector will have threat from new entrants, and dot.com sector will be no exception. Actually, the dot.com sector, used to denote the companies that mainly do their operations over the internet with a website and a domain ending with .com, got originated due to the entry of new entrants particularly in Silicon Valley. This being t he case, there will be a constant threat of new entrants in this sector. New entrants are always attracted to industry sectors that are flourishing and that seem to offer the potential for healthy profits, dot.com industry fits that bill aptly. (ââ¬Å"Consulting Toolsâ⬠). They are targeting various segments in the dot.com industry from emails, video sharing and hosting, etc., Although, Google and Yahoo have consolidated their positions in these segments and hold larger market share, these new entrants by giving widespread services are minor threats. Threat of Substitutes The threat of substitutes will be found more in the dot.com industrial sector, because the lines of control and authority are blurred in the virtual world. With no worldwide authority to detect and stop copyrights infringement and other violation of trademark services, substitutes can come with similar services or slightly modified services, negatively impacting pioneers like Google and Yahoo. However, the fac t is, these two companies were also accused of coming up with substituting services, violating the rights of other players, but that were only minimal. With Internet coverage increasing, the competition for online business also increases, and using this opportunity many players are coming up with substitute services. For example, Googleââ¬â¢s Iphone has been substituted by other local mobile phone makers, likewise Youtube has many substitutes like Dailymotion, Yahoomail has been substituted by many pan-national as well as local players. ââ¬Å"The Internet creates new substitution threats by enabling new approaches to meeting customer needs and performing business functionsâ⬠(Shin). Power of Suppliers In the dot.com industry, quite uniquely, the supplier of product or services as well as user or customer of service will be maximally one and the same. That is, most of the products or services offered by the companies, like websites in search engine results, videos in Youtube , Google Adsense feature, etc., are not created ââ¬Ëin-houseââ¬â¢, instead they are sourced from the suppliers outside. Those same suppliers along with sizable common people will also utilize those services as customers. Thus, the companies by aptly hosting or collecting or arranging those things and even
Thursday, October 31, 2019
Effective Bookkeeping Essay Example | Topics and Well Written Essays - 750 words
Effective Bookkeeping - Essay Example A failure to keep books properly can have very real ramifications for a school, a district, and the workers in it: it could cause intense scandal and cost people jobs and the district money. Furthermore, regular audits are done to ensure that all moneys are accounted for in reasonable ways, meaning that mistakes will get found and will have real consequences for everyone in the chain of bookkeeping, which could possibly include dismissal. It is difficult to overemphasize the importance of proper bookkeeping. This will simply serve as a refresher, please remember that the full description of appropriate policies and legislation relating to school accounting can be found in the Tennessee Internal School Uniform Accounting Policy Manual. There are several things that can lead to effective bookkeeping, and it is firstly important to emphasize basic and fundamental general rules before moving on to the specifics. Firstly, a record keeping must be orderly and complete. Any transaction incl uding school funds should be kept in a safe location, organized by date and able to be recalled at will. Secondly, transparency is of fundamental importance. If anything does seem to be amiss, it is my responsibility as principle to immediately notify a superior, and thus it is your responsibility to immediately notify me. ... These include funds of a variety of sources, including rental fees for non-district use of school property, student activity fees, donations, and even including cafeteria money. One of the most important and sometimes irking aspects of accounting is that specific fees sometimes need to be assigned to specific tasks, and cannot be used for other tasks. A schoolââ¬â¢s general fund, which constitutes money gained for the operation of a school, for instance, are only allowed to be use to supplement and not to replace the obligations of the school board, for instance. This means that while the general fund should not be used for school repairs, for instance, which are the responsibility of the district. Thus it is important to keep auditors happy and the whole process smooth that we be very conservative when administering funds, keeping careful track of the money flow and be able to demonstrate that moneys collected under one fund, the general fund, for instance, are not used in inappr opriate, or even seemingly inappropriate ways. Thus, it is incredibly important to keep strong firewalls between different kinds of funds used by the school, and flag any funds that might transfer between the two. Finally, it is of the greatest importance that enough internal controls are in place to ensure that the school is not damaged or defrauded, and that moneys are not misused. There can be very serious consequences from lack internal controls, including bank deposits being stolen, money being diverted for internal use, and so forth. This means things discussed above such as physical control of records, but also daily tallying of cash flows in and out (in cafeterias, and with cash registers, for instance) as well as ensuring proper security
Tuesday, October 29, 2019
Formal Outline Essay Example for Free
Formal Outline Essay INTRODUCTION Attention material: The world stopped getting warmer almost 16 years ago, according to new data released last week. The figures, which have triggered debate among climate scientists, reveal that from the beginning of 1997 until August 2012, there was no discernible rise in aggregate global temperatures. This means that the plateau or pause in global warming has now lasted for about the same time as the previous period when temperatures rose, 1980 to 1996. Before that, temperatures had been stable or declining for about 40 years. Credibility material: The current cycle of global warming is changing the rhythms of climate that all living things have come to rely upon. What will we do to slow this warming? How will we cope with the changes weve already set into motion? While we struggle to figure it all out, the face of the Earth, as we know itââ¬âcoasts, forests, farms, and snowcapped mountainsââ¬âhangs in the balance. Thesis statement: Today I want to share what Iââ¬â¢ve learned about global warming and itââ¬â¢s causes. Preview: We need to consider causes, effects and dangers of global warming. (Transition: Lets begin by understanding more about global warming.) BODY I. The Earth is warming and human activity is the primary cause. A. U.S. scientists said in the media January 19, 2012, about the influence of mankind on the state of global warming has increased from 18% to 51%. B. The primary way humans cause global warming is by burning fossil fuels. 1. When we drive or fly. 2. When we eat meat and Exotic Foods. 3. When we use electricity. 4. When You Move Into A New Development. (Transition: Now, from this it becomes clear why humans are the main cause of global warming, letââ¬â¢s examine its major effects) II. Global Warming effect information. A. The planet is warming, from North Pole to South Pole, and everywhere in between. Globally, the mercury is already up more than 1 degree Fahrenheit (0.8 degree Celsius), and even more in sensitive polar regions. B. Some impacts from increasing temperatures are already happening. 1. Ice is melting worldwide, especially at the Earthââ¬â¢s poles. This includes mountain glaciers, ice sheets covering West Antarctica and Greenland, and Arctic sea ice. 2. Researcher Bill Fraser has tracked the decline of the Adà ©lie penguins on Antarctica, where their numbers have fallen from 32,000 breeding pairs to 11,000 in 30 years. 3. Sea level rise became faster over the last century. 4. Some butterflies, foxes, and alpine plants have moved farther north or to higher, cooler areas. 5. Precipitation (rain and snowfall) has increased across the globe, on average. 6. Spruce bark beetles have boomed in Alaska thanks to 20 years of warm summers. The insects have chewed up 4 million acres of spruce trees. C. Other effects could happen later this century, if warming continues. 1. Sea levels are expected to rise between 7 and 23 inches (18 and 59 centimeters) by the end of the century, and continued melting at the poles could add between 4 and 8 inches (10 to 20 centimeters). 2. Floods and droughts will become more common. Rainfall in Ethiopia, where droughts are already common, could decline by 10 percent over the next 50 years. (Transition: So now, we know about global warming effects, lets see our futureâ⬠¦and how we can fix it!?) III. Predicted Effects and Impacts of Global Warming. A. Future effects about global warming. 1. Increased spread of infectious diseases: an increase in the number of people exposed to vector borne diseases (e.g. cholera) and an increase in heat stress mortality. 2. Degraded water quality: Projected climate change will tend to degrade water quality through higher water temperatures and increased pollutant load from runoff and overflows of waste facilities. 3. More frequent and more intense heat waves, droughts, and tropical cyclones. B. Some basic predictions of global warming. 1. Global mean temperature should increase by between 1.4 and 5.8 C (2.5 to 10 F). 2. The sea level should rise by between 9 and 88 cm (3.5 to 35). (Transition: Finally, I want to tell you about the solution of this huge problem.) IV. Solutions to Global Warming. A. There is no single solution to global warming. 1. Boosting energy efficiency. 2. Greening transportation. 3. Revving up renewables 4. Phasing out fossil fuel electricityManaging forests and agriculture 5.Exploring nuclear 6.Developing and deploying new low-carbon and zero-carbon technologies. 7. Ensuring sustainable development CONCLUSION Summary statement: Some impactsââ¬âsuch as record high temperatures, melting glaciers, and severe flooding and droughtsââ¬âare already becoming increasingly common across the country and around the world. However, there is much we can do to protect the health and economic well-being of current and future generations from the consequences of the heat-trapping emissions caused when we burn coal, oil, and gas to generate electricity, drive our cars, and fuel our businesses. Concluding remarks: Since 1880 the world has warmed by 0.75 degrees Celsius.
Sunday, October 27, 2019
Aluminium Based Metal Matrix Composites
Aluminium Based Metal Matrix Composites 1)à The main factor that influences elastic modulus is the matrix , for example : Composites with a aluminium 6061 matrix have a good strength and higher ductility. The reinforcement content is the main factor in the enhancement of elastic modulus in the aluminium silicon metal matrix composite. The graph below show that aluminium silicon composites with higher strength, because of the increased silicon content, such as 2024/2124 or 7075 Al, had higher strengths but lower ductility. It also shows that the elastic modulus increased with the increase in the silicon content. The matrix type also effects the elastic modulus which typically consists of particulate, nodule or whisker type matrix. (Reference 3) The yield strength is usually effected by the matrix alloy ,type and the arrangement of the reinforcement effect the strengths of composites, in particular for those which have whisker reinforcement and Ductility tends to decrease with the reinforcement content is increased. In fracture toughness tests, an increase in particle quantity reduced the toughness of the composites .The main properties which influence the fracture toughness of MMCs is the type of reinforcement, size, shape, quantity and the distribution within the matrix and the toughness of matrix. The poor fracture toughness and fatigue crack growth rate of MMCs is due to low initiation energy for fracture due to high elastic modulus. The thermal expansion coefficient of aluminium silicon carbide fibres reinforced material is significantly influenced by the thermal stresses between the matrix and fibres and thermal expansion behaviour relies on the thermal expansion of the fibres. For applications subjected to severe loads or extreme thermalà fluctuations such as in automotive components, discontinuously-reinforced metalà matrix composites have been shown to offer near isotropic properties Automotive brake disc and callipers are typically made of cast iron, the use of aluminium silicon MMC, would result in a significant weight reduction of around 50- 60% can be made which helps reduce vehicle fuel consumption and improve overall braking and handling as well as the high thermal conductivity and wear resistance, dimensional stability and excellent cyclic wear properties. Examples of vehicle which have SiC-reinforced aluminium brake disks are vehicles such as the Lotus Elise Volkswagen Lupo. For aluminium composite brake discs to become more common would requires costs to come down and for improved machine ability. Aluminium MMC shows much higher resistance to wear than the matrix material by its self. The wear of MMC is much more linear than the matrix material by self, and therefore makes it possible to predict wear patterns and the amount of use than can be obtain from a component. The reinforced particles resist the abrasion and restrict the deformation of MMCs which provides a useful guide for better control of their wear. (reference 5)MMC shows much higher wear resistance than the corresponding matrix material; unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily; the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC; the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wearMMC show s much higher wear resistance than the corresponding matrix material; unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily; the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC; the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wearMMC shows much higher wear resistance than the corresponding matrix material; unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily; the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC; the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforce ment particles on the wear resistance of MMCs and provide a useful guide for a better control of their wear.MMC shows much higher wear resistance than the corresponding matrix material; unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily; the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC; the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wear.MMC shows much higher wear resistance than the corresponding matrix material; unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily; the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC; the reinforced particles resist the abrasion and r estrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wearMMC shows much higher wear resistance than the corresponding matrix material; unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily; the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC; the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wearMMC shows much higher wear resistance than the corresponding matrix material; unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily; the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC; the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wear 3) From data gathered with the use of the CES software it gave for of the most suitable manufacturing method for a metal matrix component with slots in the design. The above graph so that these four production methods were Laser powder forming, squeeze casting, powder injection molding and die press sintering. Several criteria were considering during the material selection such has relative cost index , production rates , tool life and economic batch size. looking at the CES data , it showed that the most suitable production method be die cast and sintering. With die casting and sintering a relatively high rate of production can be achieved whilst keeping the relative cost index low. This is important because it helps lower the cost of aluminium MMC brake disc which are still expensive and not used by many manufactures because of this. Pressing and sintering is a powder processing process that falls in the manufacturing process category of forming .The typical cold pressing and sintering process starts with aluminum silicone MMC in powder being poured into a closed mould. Pressure is then applied to the closed mould at a high enough pressure for the powder to bind together. After the disc is taken out of the mould it is then put through the sintering process. The sintering process begins with the brake disc being heated up in order to burn of any lubricant and is then heated up to a even higher sintering temperature in a protective gas surrounding to prevent oxidization. (reference 2) 4) There has been an increased interest in the use of Aluminium based metal matrix composites in brake discs and drums in recent years. The wear characteristics of AMMCs were high speeds and loads the behaviour could be greatly improved beyond that of cast iron discs, with the correct match of disc and pad material. Casting process is very difficult if reinforcement Material is wet and this can results in non-uniform distribution and poor mechanical characteristics for the finished brake disc. To resolve this problem, reinforcements are pre-heated at 500Ãâà °C for 40 minutes. Porosity is the major problem in casting which is why moulds are preheated, to 500Ãâà °C, which helps in removing the gases which are trapped in the slurry to go into the mould. It also enhances the mechanical properties of the cast AMC.à Sorter fibres in a random orientation are typically not as strong as long fibres in a specific orientation. However the use of sort fibres in random orientation mean s that less human interaction is required in the production and therefore helps brings the cost of production and well as minimising the possibly of something going wrong in the production process my eliminating human error. SiC/Al composites have increased strength with the increase in the silicone content and had higher strengths but lower ductility. The use of longer fibres also means that they generally have to be arranged in a specific order which is time consuming and also requires human interaction and this all reduces the number of units that can be produced a day. An example of this carbon ceramic brake disc where the discs which have longer fibres cost significantly more and will only be used in very exotic cars such as Koenigsegg where as more budget sports cars such as Porsche tend to use discs with sort random fibers which are far more cost effective. Bibliography 1) A. Mazahery, M. O. Shabani . (2012). Mechanical properties of A356 matrix composites reinforced with nano-SiC particles. Available: http://link.springer.com/article/10.1007/s11223-012-9423-0. Last accessed 16/12/2016 2) unknown. (2004). Aluminum Matrix Composites with Discontinuous Silicon Carbide Reinforcement. Available: http://www.totalmateria.com/page.aspx?ID=CheckArticlesite=ktnNM=108. Last accessed 16 December 2016 3) Ajit Bhandakkar1*, R. C. Prasad1, Shankar M. L. Sastry2. (2014). Elastic plastic fracture toughness of aluminium. Available: http://www.vbripress.com/aml/uploads/540c820f6cee71410105871_fullabstratct.pdf. Last accessed 16 December 2016. 4) S. Taufik a, à ¢Ã Ã
½, S. Sulaiman b . (2014). Thermal Expansion Model for Cast Aluminium Silicon Carbide . Available: http://www.sciencedirect.com/science/article/pii/S1877705813020511. Last accessed 16 December 2016. 5) Parth S. Joshi, Kiran C. Hegade, Apoorv S. Kulkarni . (2016). Manufacturing of Disc Brake Rotor Using. Available: http://www.onlinejournal.in/IJIRV2I6/226.pdf. Last accessed 16/12/2016.The machinability of an Alà ®-à ¸5 Mg alloy reinforced with 5 vol% Saffil and 15 vol% SiC was compared with that of Duralcan (A356) reinforced with 15 vol% SiC. In terms of tool wear and metal removal rate with both cemented carbide and polycrystalline diamond (PCD) cutting tools, it was found that the Duralcan/ SiC was significantly easier to machine than the composite with the Al-5 Mg matrix. This is attributed to the effect of the matrix on the mechanisms of abrasion wear. The machinability of an Alà ®-à ¸5 Mg alloy reinforced with 5 vol% Saffil and 15 vol% SiC was compared with that of Duralcan (A356) reinforced with 15 vol% SiC. In terms of tool wear and metal removal rate with both cemented carbide and polycrystalline diamond (PCD) cutting tools, it was found that the Duralcan/ SiC was sig nificantly easier to machine than the composite with the Al-5 Mg matrix. This is attributed to the effect of the matrix on the mechanisms of abrasion wear.
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