Calculation Assignment Example | Topics and Well Written Essays - 1000 words

Calculation - Assignment Example The calculations are shown below The incremental revenue is the increased amount of revenue, which is solely linked to the additional revenue generated from the installation of the New ATM machines. The installation is subject to increase in revenue by $300,000 at the end of the first year of installation. Therefore, the amount of $300,000 is shown in year 1. The revenues have shown a constant growth rate of 5% from second year onwards. Therefore, the increased amount of revenues has been incorporated while calculating the cash flows of the project. Therefore, the increase in the Net working capital is subject to the cash outflow. In other words, purchase of inventory increases the current assets and also increases the net working capital of the organization but the increase in inventory requires cash outflow. On the other hand, the reduction in net working capital implies the increase in the cash inflow. The reason is that the increase in current liability implies increase in short term borrowing. The increase in short term borrowing is subject to reduction in net working capital but increase in cash inflow. Therefore, the reduction in net working capital increases the cash inflows, which is then added to the incremental revenues. The net working capital has shown the increasing trend with a constant growth rate of 6%. The incorporation of the growth rate of net working capital increases its value and reduces the incremental revenues by such increased amounts of net working capital. The annual maintenance cost is $10,000 at the beginning of the project and shows the increasing trend with constant growth rate of 5% each year. The incremental cost is then subtracted from the incremental revenues each

Gothic Genre Explored in Tim Burtons Films Essay Example for Free

Gothic Genre Explored in Tim Burtons Films Essay

Unqualified With Explanatory Paragraph Or Modified Wording Accounting Essay

Unqualified With Explanatory Paragraph Or Modified Wording Accounting Essay An audit report is an evaluation done by an internal or an external independent professional auditor, regarding the financial status of a business entity. Auditor will express his/her opinion on whether the information on the financial status of a company is free of any misrepresentations or not in the audit report. This report is essential for all the users of financial statements such as individuals, companies or government because it provides guarantee on a companys financial statements since the users rely on audit report to make any decision. Audit report can be classified into two broad categories, unmodified audit report and modified audit report, which are then further classified as follows: In short, auditor can issue five different types of audit reports, which are standard unqualified, unqualified with explanatory paragraph or modified wording, qualified, adverse and disclaimer of opinion. Each types of these report is representing a different circumstance faced by the auditor during the audit process and the auditor will express different opinions in each report. Firstly, standard unqualified audit report, also known as clean opinion because the auditors opinion is not necessary to be qualified or modified. It is the best type of report that a company can receive and also the most common audit opinion. This report is issued when the auditor concludes that financial statements appear to be presented fairly and there are no any significant reservations or any material misstatements found within the financial statements presented. The standard unqualified audit report covers seven distinct parts: Report title Introductory paragraph Scope paragraph Opinion paragraph Name of auditor Auditors address Audit report date. Typically, the report title will consists the word independent to demonstrate that the audit report prepared is unbiased in all aspects. The introductory paragraph states the responsibilities and roles of management and the auditor and it is the first paragraph of the report; the scope paragraph is a factual statement regarding the action of the auditor in audit process; the opinion paragraph indicates the conclusion made by the auditor based on the audit result obtained and it is the last paragraph of the report. The name will identify the audit firm and the address show the location of the audit firm. The date will show when the audit process is completed. For an auditor to issue a standard unqualified audit report, there are five specific conditions required to be met: The financial statements must comprise all statements. (Statement of Cash Flow, Income Statement Balance Sheet) The engagement is following the International Standards of Auditing (ISAs) in all respects. Adequate evidences have been gathered to conclude that the three standards of fieldwork have been met. The approved accounting standards, which is the Financial Reporting Standards (FRS) and the Company Act, 1965 in Malaysia are used to prepare the financial statements and the financial statements includes proper and sufficient disclosure of all relevant material matters. The financial report is under the condition that is not requiring any additional explanation or any modification. For example, if the companys financial report had met these five circumstances, the opinion paragraph will contain the phrases: In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position ofà ¢Ã¢â€š ¬Ã‚ ¦ (Auditors report, 2012) to warrant the financial statements give a true and fair view of the companys financial status. If any of the five conditions mentioned above are not met, the auditor cannot issue a standard unqualified report. Hence, auditor is necessary to issue other types of audit report. On some occasions, a business can receive an unqualified audit report on its financial statements, but it is not a standard unqualified audit report. It can be classified as unqualified audit report with explanatory paragraph or modified wording. This report met the criteria of satisfactory audit and the financial statements are presented in a true and fair view basis. However, the auditor believes that it is necessary to provide additional information or to modify in the wording of the standard unqualified report. In order to ensure the issuance appropriate unqualified report with an explanatory paragraph or modified wording, it depends on five circumstances: Application of approved accounting standards is lacking of consistency. There is significant doubt about going concern. Auditor agrees with a deviation from the promulgated accounting principles. There is specific matters about the financial statements need to be emphasized. Other auditors are involved in the reports. The first four circumstances mentioned above require the addition of an explanatory paragraph in the reports. Thus, the auditor has to issue an unqualified audit report with explanatory paragraph. For example, when the auditor found that the company does not have the ability to pay its debts when it is due (Going concern). For instance, auditor issues an unqualified audit report with explanatory paragraph which explain that there will be a misleading if the company continues to stick to the promulgated accounting principles (Deviation). Furthermore, the introductory paragraph, scope paragraph and opinion paragraph are remains without any modification while a separate explanatory paragraph is added after the opinion paragraph. The explanatory paragraph will begin with the phrases: Without qualifying our opinion, we draw attention toà ¢Ã¢â€š ¬Ã‚ ¦ (Alvin et al., 2008, p.58) In contrast, an unqualified audit report with modified wording will be used only when the audit report involving the use of other auditors. In this case, the report consists of three modified paragraph. For instance, an unqualified audit report with modified wording is issued when auditor wants to make reference in audit report or to qualify the opinion. (Other auditors are involved) Due to some reasons, there are three circumstances that are inappropriate for an auditor to issue an unqualified report. The three conditions that required a departure from an unqualified audit reports are: Scope limitation Departure from approved accounting standards Lack of independence of the auditor Scope limitation exists when the auditors seemed unable to gather adequate evidence to make a conclusion on whether the financial statements are stated in line with the approved accounting standards. Departure from approved accounting standards arises in situation where the presented financial statements are not in conformity with the approved accounting standards. Lack of independence of the auditor means there is a non-independent relationship under the code of ethic between auditor and auditee or there is material conflict of interest occur between this both parties. When these three conditions exist and is material, the auditor is required to issue a report other than the unqualified report, which are qualified opinion, adverse opinion and disclaimer of opinion. A qualified report is issued when the auditor encountered any of these two situations, scope of audit is restricted or single deviation from approved accounting standards, but the financial statements presented are free of any misstatements. Typically, the writing of a qualified opinion is very similar to an unqualified opinion, but it includes an explanatory paragraph that is clearly explains the reasons for the qualified audit report before opinion paragraph but after scope paragraph. Moreover, the term except for must be used only when an auditor issue a qualified report. This will indicate that the auditor is satisfied that the overall financial statements are stated fairly except for certain aspect of them. The introductory paragraph is similar to the unqualified opinion whereas a slight modification is done in the scope and the opinion paragraphs. For example, in scope paragraph to inform the user about the exception of this qualification, the auditor performs the rest of the a udit without qualifications by stating: Except as discussed in the following paragraph, we conducted our audit (Auditors report, 2012) whereas in opinion paragraph, the auditor should states: In our opinion, except forà ¢Ã¢â€š ¬Ã‚ ¦ (Auditors report, 2012) to remind the user regarding the expressed qualification is explicitly excluded from auditors opinion. In addition, a qualified report can be in the form of a qualification of both the scope and the opinion or of the opinion alone. Auditor may issue a scope and opinion qualification when he/she could not accumulate sufficient data required by the approved accounting standards. This may due to the clients restriction or the auditor had encountered some circumstance that prevents him/her to conduct a complete audit. Examples of this include an auditor not being able to observe and test a companys inventory of goods. If the auditor audited the rest of the financial statements and is reasonably sure that they conform with GAAP, then the auditor simply states that the financial statements are fairly presented, with the exception of the inventory which could not be audited. (Auditors report, 2012) In this case, a standard wording for introductory paragraph will be used and the scope paragraph will be edited to make user aware of the qualification and the opinion paragraph is to be modified. On the other hand, a qualification of the opinion alone is issued when specific records are missing or some parts of the financial statements are not followed with the approved accounting standards. Examples of this include a company dedicated to a retail business that did not correctly calculate the depreciation expense of its building. Even if this expense is considered material, since the rest of the financial statements do conform with GAAP, then the auditor qualifies the opinion by describing the depreciation misstatement in the report and continues to issue a clean opinion on the rest of the financial statements. (Auditors report, 2012) In this situation, auditor use standard wording for introductory and scope paragraph, then add an additional paragraph to explain the companys deviation from the approved accounting standards and add in certain phrases in the opinion paragraph. Adverse opinion is the worst type of audit report that a company received and it is considered the opposite of an unqualified opinion. Auditor will issue this type of report when it is believes that the financial reports presented are differ from the approved accounting standards. In addition, auditor had concluded that misstatement and misleading are both material and pervasive to the financial statements, this means the information contained have been falsified or are in other ways erroneous. For instance, the failure of a company to issue the consolidation of all its operations or a material account such as revenue account is not recorded properly. The wording of the adverse report is exactly the same as with the qualified report. Auditor will modify the scope paragraph accordingly and add another paragraph after scope paragraph, but before opinion paragraph to discuss the reason why it is an adverse opinion. The opinion paragraph involves the most significant change with the qualified report, where it is stating the facts that the financial statements are not conformity with the approved accounting standards. For example, the opinion paragraph will contain the phrases: In our opinion, because of the situations mentioned above (in the explanatory paragraph), the financial statements referred to in the first paragraph do not present fairly, in all material respects, the financial position ofà ¢Ã¢â€š ¬Ã‚ ¦ (Auditors report, 2012) to reveals that the financial reports are unreliable, inaccurate and do not present a fair view of the companys financial status or results of operations and cash flows. It is an indication of fraud. An adverse opinion can arise only when the auditor has knowledge, after an adequate investigation, of the absence of conformity. (Alvin et al., 2008, p.60) When receiving an adverse report, the auditee is requested to do correction in its financial statements and send it to re-audit to obtain another audit report. Otherwise, the investors, lenders, governments and other users will generally not accept it. Lastly, a disclaimer of opinion, generally referred to simply as a disclaimer, is a special type of audit report. In certain situation, due to various reasons, an auditor could not perform their work. He/She tried to audit the company but unable to obtain sufficient amount of audit evidence, thus he/she refuses to express an opinion on the companys financial status. Since the auditor could not complete an accurate audit report, he/she will issue a disclaimer of opinion. A disclaimer opinion is differs from the adverse opinion. It is only issued when the auditor is lacking of the knowledge regarding the companys financial statements while adverse opinion is issued when the auditor has the knowledge that the financial records provided has been misrepresented. A disclaimer of opinion is appropriate in the following circumstances: lack of independence (SAS 26); scope limitations (inability to obtain sufficient competent evidential matter) (SAS 58); when the auditor concludes that there i s substantial doubt about the entitys ability to survive (going-concern) (SAS 59); and matters involving uncertainties (SAS 79). (Davis, Robert R., 2004, para. 2) For example, the client intentionally hides or refuses to present sufficient appropriate information and evidence to the auditor in significant areas of the financial statements. (Scope limitation) For instance, the company has faced going concern problem which means that the company may not be able to continue operating in the near future. (Substantial doubt about the entitys ability to survive) Additionally, a disclaimer opinion is also distinguished from the other types of audit reports. This is because it only provides little information concerning the audit itself and consists of an additional paragraph that explaining the reasons for the issuance of disclaimer report. In this report, all the paragraphs are under extensively modification and with the exclusion of the entire scope paragraph since the auditor could not adequately perform the audit. The first phrase in the introductory paragraph will be changed to We were engaged to audità ¢Ã¢â€š ¬Ã‚ ¦ (Auditors report, 2012) instead of We have auditedà ¢Ã¢â€š ¬Ã‚ ¦ (Auditors report, 2012) in order to let the users aware of the audit is not completed. Since the audit was not completed and opinion cannot be expressed, the auditor disagrees to take any responsibility by omitting the last sentence in this paragraph, that is: Our responsibility is to express an opinion on these financial statements based on our audit. (Audito rs report, 2012) Just like the qualified and adverse opinions, auditor must discuss the conditions for the disclaimer in explanatory paragraph. Lastly, the opinion paragraph is completely adjusted to Because of the significance of the matters discussed in the preceding paragraphs, the scope of our work was not sufficient to enable us to express, and we do not express, an opinion of the financial statements referred to in the first paragraph. (Auditors report, 2012) in order to let users know that the auditor cannot form and express an opinion on the companys financial status due to the conditions stated in the explanatory paragraph.

Public Health in 1665 :: Public Health Care Essays

â€Å"Ring around a roses, A pocket full of Poses, A tissue! A tissue! We all fall down!† Even today, children innocently chant this old nursery rhyme, bringing the old saying into reality, â€Å"Ignorance is Bliss†. It’s eerie, to think that this old rhyme in fact gives a perfect description of one of Europe’s worst nightmares, the Great Plague. Many people forget the horrors of the Plague, and when they do remember and think about it, Public heath is rarely a factor that plays a big part when people start to think things through. There were quite a few public health measures in 1665 – the time of the plague. However, how many of these measures worked? An important fact to remember is that in those times, opinions and actions were either based on or blamed on religion and superstition. For example, people started marching across the country, punishing themselves on the basis that the plague was the result of all of man’s sin, whilst trying to persuade people of their cause. Also, charms were used by some cultures, such as the â€Å"Abra Kadabra† charm, which was either carved, or worn as protective jewellery to ward off the evil spirits causing the plague. It looked similar to the image below. A B R A K A D A B R A B R A K A D A B R R A K A D A B A K A D A K A D A One measure they had was that of the â€Å"red cross†. This is where they would paint a red cross on the doors of people who were diagnosed with the plague. I think this would have worked because it would let people know who had the plague, so that they could avoid falling ill themselves. A law was made, saying that once someone was ill with the plague they were to stay in their house. Anyone who happened to live in the same house as the unfortunate soul was also locked in, with fear that they could spread the disease. Beggars were not allowed to wonder the streets at anytime, and were executed immediately for doing so without a given reason. All of these, although sensible ideas (apart from the execution..) would not contribute towards public health, as the disease was not contagious in the human community. It was in fact passed on from fleas living on black rats, but this knowledge had not yet been developed.

Newton Weights Essay

As it is known, different materials have different properties. They act differently under different circumstances. There are a number of properties of matter which can be explained in terms of molecular behaviour. Among these properties is elasticity. Intermolecular forces: these are electromagnetic forces between molecules. The strength and direction of these forces differ in accordance to the separation of the molecules. Materials are often subjected to different forces. Forces can be distorting, that is they can alter the shape of a body. Two distorting forces I shall look at are tension and compression. Tension/tensile stress, more generally referred to as stretch, happens when external forces (larger red arrows) act on a body so that different parts of that body are pulled to go in different directions. In most materials, the intermolecular force (smaller aqua arrows) of attraction shows resistance to these external forces, so that once the external forces have abated, the body resumes its original shape/length. Compression/compressive stress, more generally referred to as squashing, happens when external forces act on a body of material so that different parts of that body are pushed in towards the centre of the body. In most materials, the intermolecular force of repulsion acts against these external forces, so that when the distorting force is removed, the molecules return to their original arrangement and spacing. Materials that do this are known to have the property of elasticity. In short, elasticity is the ability of a material to return to its original shape and size after distorting forces (i.e. tension and/or compression) have been removed. Materials which have this ability are elastic; those which do not have this ability are considered plastic. This always happens when the distorting force is below a certain size (which is different for each material). This point where the body will no longer return to its original shape/size (due to the distorting force becoming too large) is known as the elastic limit (which differs from material to material). As long as the distorting force is below this size, the body that is under the external forces will always return to its original shape. As the body is put under more and more stress (distorting force), the body strains (deforms, extends) more and more. Right up to the elastic limit, the body will continue straining, in accordance to the size of the stress. This is where Hooke’s Law comes in. Hooke’s Law states that, when a distorting force is applied to an object, the strain is proportional to the stress. For example, if the load/stress is doubled, then the extension/strain would also double. However, there is a limit of proportionality (which is often also the elastic limit), only up to which Hooke’s Law is true. Since the strain is proportional to the stress for different materials where Hooke’s Law is true, then there should be a fixed ratio of stress to strain for a given elastic material. This ratio is known as its Young’s Modulus. Young’s Modulus can be calculated from the stress and the strain of an object under tensile/compressive stress. e = change in length/extension of object, in cm p = original length of object, in cm a = cross-sectional area of object, in cm2 f = size of force applied, in newtons For example, the Young’s Modulus of Mild Steel = 2 x 1011 N m-2 Copper = 11 x 1010 N m-2 Hooke’s Law and Young’s Modulus apply to most elastic materials, with the exceptions. A special shape which material can be bent into to in order to optimize use of the elasticity of a material is a spring. Springs are used by us everywhere: in seats, mattresses, cars, toys, and all other sorts of necessary objects and items we encounter in our daily lives. They are normally made from metal, though they can come from plastics, rubber or even glass. When compressive stress is applied to a spring, the spring noticeably ‘shortens’, though the actual length of the body material shortens very little. It is due to this special shape of springs that let it do this. The same occurs when tensile stress is applied. When a spring is being extended or pulled on, it may seem the spring is changing length dramatically, but in actual fact the spring’s body material relatively doesn’t change shape at all, but rather the shape of the body is more spaced out. AIM My objective in this experiment is to find out how a spring varies in length with added load. I also want to witness Hooke’s Law in action, and I want to observe the behaviour of the spring/s even after the load added causes the stress in the spring to exceed the elastic limit. PLAN My experiment is fairly straight forward to set up and carry out. In my experiment the data that I intend to assemble is the extension of the spring each time new/extra load is added to it. It is necessary that I use the most appropriate equipment for my experiment, hence I have chosen to use a retort stand which will hold up the spring and its weights up, a second retort stand from which a meter rule will be suspended. The metre rule will be right up against the spring, so as to ensure an accurate reading. There is no evidence that I can take before hand, other than the material of the spring. This entire experiment has to be as accurate, fair, precise and reliable as can practically be, but it is only possible to make it so to a certain extent. For instance, I cannot be absolutely sure that that all Newton weights weigh exactly 1000 grams, nor is it practical to find a ruler that is absolutely accurate. Hence I am forced to settle for the metre rule, which is accurate to about 1 millimetre, and I will be aware that the Newton weights will be within an accuracy of about i 20 grams. These factors will not really be in my control; however I can reasonably account for them when I construct a graph from my table by using error bars for each point plotted. Another measure I am taking is that I shall not be the only one to take readings from the metre rule; I shall have two other peers who will also be reading off the same metre rule. From these 3 readings I shall draw up averages of level of weight applied to the spring. To be practical and observing at the same time, I must choose an appropriate extent and range, as well as appropriate integers, for the data that I intend to collect. I will be going to take the first measurement as the length of the spring when there is no mass attached to it. The last measurement shall be right up to when the spring can no longer hold on to the weights. I have a rough idea of the spring that I shall use, and I am assuming now that the spring shouldn’t be able to hold much more than 13 kg. I shall be adding the weights one at a time (one Newton/kilogram at a time), and I shall be taking measurements at each of these intervals. The measurements that I shall take of the length of the spring will be in millimetres. So basically, once I have set up the entire apparatus, I shall start off taking the measurement of the spring when it is free of load, then let my peers take theirs. Then I shall add a Newton weight one at a time, taking measurements with my helpers each time I add one. Of course we’ll be wearing our goggles, because I don’t want to take any risks. 1) Collect equipment. 2) Prepare apparatus as shown in diagram. 3) Record the length of the spring when it is load-free, to cm, in the prepared table for results. 4) Add a weight/mass of 1 kg or 1 N, and then take the new length of the spring. Record in the prepared table for results. 5) Continue adding on weights/masses of 1 kg, recording the length of the spring each time in the prepared table for results. This should be carried on until the weights can no longer be attached to the hanging spring. APPARATUS. The apparatus that I shall need set up for my experiment consist of the following items: 1. Retort Stands (x 2) 2. Boss and Clamps (x 2) 3. Metre Rule 4. Spring (length: 50 mm) 5. Newton Weights (x 15 approximately) Other items I shall need are three pairs of goggles. SAFETY I must consider my safety when working in the laboratory. It is common when this type of experiment is carried out that when a weight or anything for that matter is suspended from something as unstable as a hanging spring, the item in being suspended is prone to fall.

Analysing Two Newspaper Articles Fronting The Same Subject Essays

Analysing Two Newspaper Articles Fronting The Same Subject Essays Analysing Two Newspaper Articles Fronting The Same Subject Paper Analysing Two Newspaper Articles Fronting The Same Subject Paper I am analysing two newspaper articles, one from The Daily Mirror and the other The Guardian. Both articles are revealing the next James Bond actor: Daniel Craig. The papers are written for different types of people. The Mirror is aimed at working class people and The Guardian is aimed at professional, people. Both papers use different types of language for the readers to understand. The Mirror uses simple language. For example, Id like to thank the royal marines bringing me in like that and scaring the shit out of me, this shows the actors personality. The Guardian has mixture of complex and compound sentences, this will be tougher and grittier, and the relationship bond has with the girl, Vesper Lynd, is a lot more serious than weve seen in the past. The headlines articles give different point of view about the film and actor. While the sub heading gives additional information about the actor. The Daily Mirror uses a simple sentence, His name Craig, Daniel Craig, this is a pun on Bond language and Bond fans would easily identify this device. The Guardian writes the first blond bond bursts into action in the shape of Daniel Craig, this metaphorical sentence suggests that the film is full is full of action, the use word bursts emphasise this point. Both articles use Bond specific language the names Bind, James Bond to draw the readers attention to this particular article. However, The Guardian uses more formal language telling the reader in as much detail as possible what the article is about and what it is based on. Both articles use direct speech from people associated with the film or in the film industry. The Mirror uses more entertaining language and facts, for example, I dropped what is was carrying, and went straight to the alcohol section, got a bottle of vodka and a bottle vermouth, I went right home and had a martini or two. This sentence shows the actors personality and helps to make the article more interesting. The Guardian gives more information and avoids the actors personal life. Unlike The Mirror, The Guardian gives more information about the film itself, this will be tougher than the last films. The tone of The Guardians article on the next bond film gives more information to the reader; this is reflecting the target audience, which in this article, is aimed at middle class professionals. The Daily Mirrors article also entertains the reader as it gives detail about Daniel Craigs love life; it has a lighter tone to it which helps to retain the readers attention, again responding to the target audience; it contains Bond specific language and talks more the actors personal life. This article also tells us about the way the actor was brought to the ceremony where as The Guardian doesnt give any personal information. The Guardian discusses more about the actor himself.

Juan Rodriguez C essays

Juan Rodriguez C essays The reputation of California as being a place to "jettison assumptions and try different things" appears to have originated from its earliest days. By reflecting on the individual who discovered San Diego, we see stamina, determination, and the desire to "continue on," "find success," and to maximize opportunities to their fullest. Back in the 1540s there was a Portuguese explorer and soldier by the name of Juan Rodriguez Cabrillo (?-1543). He was known as "a skilled mariner and navigator." Today, Cabrillo famous for being the man who "discovered San Diego Bay" on September 28, 1542. Within the definition of The California Dream, lay opportunities for success, however, there are many ingredients that factor into achieving this Dream. Being willing to accept opportunities, challenges, and ideas (such as Cabrillo accepted when given the command to explore the northwestern most part of Mexico ), the utilization of man-made and natural resources, and time and location, are just a few of the elements that are essential in defining the California Dream. The combination of these ingredients along with the determination for success and lack of fear-of-failure, can sometimes make The Dream-reality. FAMILY NAME APPARENTLY NOT A RESOURCE Cabrillo possessed the necessary ingredients for success. Believed to have been born in Portugal, though it is not certain where, he lived most of his life in the Spanish New World colonies. Dr. Joan Jensen, a member of the Cabrillo Historical Society and former professor of U.S. history at California Western University, visited Portugal twice to see if she could learn something about the birthplace of Cabrillo. The result of her guided two-week trek yielded some significant discoveries, "No one knows exactly where Cabrillo came from or where he got his name-were not able to find any other Cabrillo in Spain in the late 15th century or in Portugal either." Certain places...

philadelphia essays

philadelphia essays Jonathan Demme did not choose to call this movie Andys struggle, or prejudice against gays. Instead he decided to name the film after one of Americas most proud and famous cities, Philadelphia. He chose to do it like this because it is not a story about one man and it is not a story about gays. It is a story about society and how back in 1993, we were ignorant to the HIV virus and we thought of gays and homosexuals as lesser people. Never before had any director attempted to portray this issue in a film, but it was a long over due theme that needed to be addressed. And Mr. Demme portrayed this message wonderfully through the use of complex characters. He used their transformation throughout the film and character arcs to show how we as a society acted towards this serious issue and as the story progressed, we began to see just how ignorant we all were. The story begins with the director taking us through the streets of Philadelphia while the ever so talented Bruce Springsteens streets of Philadelphia plays softly in the background. Once the short introduction comes to an end, this is when we meet our two protagonists, Andrew Beckett (played by Tom Hanks) and Joe Miller (played by Denzel Washington). It is through these two characters that the main message of the film is delivered. As the story goes on we see how each character reacts to the changes going on in their lives and in the lives of others. The first scripted scene of the movie is of Both Andy and Joe sitting side by side in a lawyers office. At this point we do not know much about either character but we are introduced to who they are. Although Joe is the character depicted as society and it is really through his character arc that we see the major changes, Andy has a serious transformation as well. Andy starts off the film as a regular guy who works in a law firm. All we see is that he is a corporate lawyer who w...

Building Engineering services Essay Example | Topics and Well Written Essays - 2750 words

Building Engineering services - Essay Example With technologies like telecommunication, internet & video conferencing etc gaining presence the people across the world have become closer and interaction among them has increased. This has given companies from different countries access to a large talent pool, newer avenues and increased business opportunities. With business expansion also comes increased manpower and equipment and naturally the need for more buildings to house them. The last couple of decades has seen an unprecedented growth in the construction of residential and non-residential buildings across the world particularly in developing countries. The bigger the size of the building, more the number of building services and more the complexity of these services. With bigger the buildings the cost of deployment and maintenance increases and leads to high energy bills. So the emphasis naturally turns towards energy savings. Energy savings not only results in monetary savings to the company but also gives management the s atisfaction of doing their bit towards environmental protection. Typically, when a new building project is planned, the management may appoint one or many firms or individuals having specific skill sets. These include an Architect, Quantity Surveyor, Project Management Company (PMC), Service Consultants, Technology Consultants, Third Party Testing & Commissioning Agency etc. These can directly appointed by the management or the management can appoint an architect or PMC and they in turn appoint the rest. Either ways, Architect usually reigns supreme and is the fulcrum of the structure around which others work around. Generally, the plans and layouts are designed by the architect upon which the various service consultants design their respective systems. For example, the air conditioning consultant follows the interior designer in terms of deciding the duct sizing, location of the air handling unit etc. A lot of importance is given to the aesthetics of the building and

Write a paper on everything that rises must converge Research

Write a on everything that rises must converge - Research Paper Example One of the major themes in Everything That Rises Must Converge is the theme of race as one of the key social and cultural concerns in the American society in 1960s, and it is addressed and analyzed in many ways in the piece. As it is follows from the short story, there are two views on the situation that took place in the society, and they depended on people’s belonging to a particular generation. Specifically, Julian’s mother as a representative on an older generation adheres to old cultural norms of the society, meaning she does not accept any changes regarding race and social classes. In fact, she grips hold of her old-fashioned views and wants to impose them upon her son. In particular, at first convenience she tries to remind her son and, perhaps, even herself that they come from a good and respected southern family and that their ancestors were wealthy and powerful: â€Å"Your great-grandfather was a former governor of this state†, â€Å"Your great-grandfather had a plantation and two hundred slaves† (O’Connor). That is to say Julian’s mother chooses to live on her family’s greatness, which is now gone, because that gives her a sense of being as powerful and renowned as her family used to be in the past. Her behavior and overtly racist attitudes show narrow-mindedness of her generation when it comes to changes and new social norms. Overall, from how O’Connor depicts it, it follows that for Julian’s mother there is a great necessity to separate herself from African Americans who have suddenly become the equal part of the society she lives in. this is one more reason why she is used to reminding about her roots and social standing of her ancestors. She separates herself and her son from those who is different from them, and this kind of separation suggests her attitude towards African Americans is of a discriminatory character.

The Strategic Management of Economy Hotel in China (Proposal) Essay

The Strategic Management of Economy Hotel in China (Proposal) - Essay Example In the hotel industry a similar approach should be used. This study focuses on a specific part of the hotel industry: the low budget hotels. The strategic management framework of the sector’s hotels is explored by referring to the case of a specific country: China. The above country has been chosen because of the following two reasons: a) because of its position as a major competitor in the global economy and b) because of its significant achievements in regard to the development of the hotel industry. This study aims to show that the strategic management practices used in the sector’s hotels in China have a key role in the industry’s development; the improvement of certain of these practices, as suggested in the study, could secure the sector’s growth, a fact that would highly benefit the country’s economy. Introduction Economy hotels, as businesses, have been highly expanded worldwide. The strong financial pressures developed in the international market especially from 2007 onwards had a key role in this phenomenon. In addition, the development of technology has led to the radical decrease of distance between regions; travelling for covering various needs, including business, education or health, has become highly popular at the level that the time involved can be quite short. The establishment of hotels of low budget has been considered as a necessity so that the housing needs of an area’s visitors are covered at low cost; such perspective has been proved to increase the area’s popularity, as a tourist destination but also as a business center. Under these terms, the growth of economy hotels sector can be considered as expected. Countries that aim to secure their economic growth have emphasized on the development of the particular sector; China is an example of this trend. As in other countries, in China also, the sector’s rate of growth is not standardized; for example, during the recent global recessi on the profits for the hospitality/ tourist industry in China were reduced (Chon et al. 2013). This study aims to help to identify these problems so that solutions are retrieved based on the low cost philosophy that characterizes the sector’s businesses. Research Background and Motivation China is considered as one of the most powerful economies worldwide. The flexibility of the Chinese economy seems to be its major advantage. Indeed, the growth of China is not based on strict and standardized economic rules; rather, emphasis is given on innovation and the continuous monitoring of market trends (Freed 2011). Economy hotels have become quite popular in markets worldwide. The growth of the sector is indicated in the figures/ data included in the table of Figure 1 below. Figure 1 – Growth of economy hotel sector in China, up to 2012 (Shen 2013, p.1) The willingness to identify the strategic management needs of the economy hotel industry in China has been the key motivatio n for the development of this study. According to a recent report the economy hotels sector represents just 30% of China’s hotel industry, a percentage though that it is expected to be significantly increased in the future (PR Newswire 2013). At the same time, the competition in the sectors seems to be limited, as about 47% of the sector’s hotels are owned by three brands: ‘Home Inns Group, Hanting Inns and Hotels and 7 Days Group Holdings’ (PR Newswire 2013). The strategic management characteristics of the sector should be identified and

Changing Role of the Product Designer from 18th Century to Now Essay

Changing Role of the Product Designer from 18th Century to Now - Essay Example Further more, as industrial firms flourished with their large production lines, there was always a search for new products and more productive processes to produce them. With the end of the craftsmen era and the beginning of the industrial era brought on by the new inventions there was a higher demand created for new products as living conditions improved. In the late 18th to the beginning of the 19th century new products was mostly developed by inventors. Inventors such as Frenchmen, B. Thimonnier (sewing machine), Francis Pettit Smith (propeller), Charles Babbage (mechanical calculator), Alexander Bain (facsimile), Hamilton Smith (washing machine) and Alfred Nobel (dynamite) to name but a few . Many of these inventions can still be found in our homes today. These inventers where mostly engineers, doctors or scientist, educated and trained in only one field. But as the industries expanded and several prominent firms was established in the 19th and early 20th century, these firms created their own design departments to create new and innovative products in order to stay competitive. Examples are Coca-Cola , Nestle , Ford and the Carrier Corporation to name but a few. Through their efforts the world saw the first six-pack, the chocolate bar, rolling production lines and air conditioning to name a few. Many organizations created design departments with dedicated designers to evaluate customer needs and then design products that will satisfy these needs. Due to the increased competition in the commercial world these departments will work on a range of products at any one time, to ensure profitability from those successfully introduced into the market. Designed products include diet soda, transistor radio (Texas Instruments), non stick pan, oral contraceptives, Barbie doll, etc Today product designs have an even more profound effect on bottom line of major companies. Although its impact may be difficult to quantify a UK trade association, the design council lodged a project to try and measure the payoff companies make from design products. The tracked the performance of 63 British companies who incorporated product design into their production processes. They measured the share price performance of these companies against the designer awards they received from 1994 to 2004. Their research indicated that these design companies outperformed the FTSE 100 and FTSE All Share indices by 200% over a ten year period. The results from their research strongly indicated that companies who invest more in product design are more likely to succeed in a competitive market. Image 2: Chris Bangle's Design for the new BMW 3 Series New Style Designers This new trend in product design created the need for new specialist in the field, and as organizations and education institutions aligned themselves to educate and train these new entries to the industry a new type of inventor was born. Product designers are trained in concept development, testing and manufacturing, and implementation. As these specialists entered the market, some went at it on their own. Designers such as Bill Moggridge a

Vodafone and the Use of Internet Essay Example | Topics and Well Written Essays - 2000 words

Vodafone and the Use of Internet - Essay Example As it operates in the telecommunication sector, it has optimal internet applications and those applications heighten its power, even while nullifying the threats. It uses internet not only for its operations but also as part of marketing tool, with its website being its main marketing tool. Vodafone UK’s Website is aptly designed providing detailed information about its products and services, but still more interactive can be incorporated. Its B2B model is working aptly benefiting both them and their partners. From ethical angle, Vodafone has included restrictions on adult content for children, so they do not become morally corrupt. Thus, Vodafone’s e-business initiatives through internet are working effectively, with need for only few optimization strategies. E-Business background Vodafone is the world’s largest firm in terms revenues earning more than 45 billion pounds and is the second-largest in terms of subscribers having close to 450 million subscribers as on December 2011. (Vitorovich 2012). In all those operations, internet technologies played and are playing optimal role in Vodafone. Vodafone’s major e-Business achievements include launching the first prepaid analogue package in the UK in 1996, acquiring the largest 3G license available in the UK by 2000 and launching their 3G service in 2004. (Further examples in Appendix A). In terms of services, Vodafone offers Mobile Broadband, Pay As You Go, etc. (Appendix B). As far as products are concerned, Vodafone do not build the phones paired with their service contracts, instead they collaborate with certain manufacturers to create Vodafone-branded phones. According to the Porter’s 5 Forces analysis (Complete analysis in Appendix C), the suppliers of Vodafone have less bargaining power due to the availability of similar handsets from many different manufacturers. On the other hand, the buyers have more bargaining power in relation to Vodafone because with strong alternati ves, they can switch to new networks without major financial burden. In addition, with internet offering the buyers the option to compare the various service providers or competitors and their services, buyers have sizable power. (Campbell 2007). There is a fairly low threat of new entrants thanks to the high costs and infrastructure including IT related ones required to compete with the big providers like Vodafone. (Thiele, Blakeway and Hosch 2010). There is a threat of substitutes in the form of mobile internet and the related services like Skype for phone calls, and other social networking options like Facebook, mails, etc., for other communications, but still there will be adequate space for Vodafone to operate. Vodafone faces high competitive rivalry from O2, 3, Orange, T Mobile, Virgin Mobile, Asda Mobile, etc. as they offer internet enabled services and products with good features and at competitive prices. E-Marketing analysis As part of e-marketing, Vodafone carry out optim al marketing strategies through various mediums particularly the internet. With internet as the ‘foundation’, Vodafone does e-marketing through its official websites, other Third Party websites in the form advertisements, press releases, etc., and also through social networking websites. Personalization: The Vodafone’s official website features all its products and services, as well as the benefits of using them, thereby providing the customers to personally choose what they

Against gun control Research Paper Example | Topics and Well Written Essays - 1250 words

Against gun control - Research Paper Example Gun tragedies are frequently taking place throughout the world. Research indicates that only in United States of America the rate of gun homicides is 72% i.e. of every 100 homicides 72 are committed using guns (Stray). There are some people who are actually against the control of guns. Though they are very few in numbers yet their argument is far substantial as compared to those who are in favor of it. This paper aims to put forward the arguments from both sides while maintaining a firm position against it. Thesis Gun control is a significant need of today’s world in order to protect and safeguard humanity. However if one would closely analyze the overall situation then it is easy to identify that the real issue is not with the access and availability of guns, but rather the main problem is with the people and their peculiar mentality which compels them to harm or kill others. Therefore the present strategies related to gun control do not seem much beneficial and neither have they shown any decrease in the rate of crimes. People in favor of gun control usually emphasize upon the affects and influence of external environment. However, they neglect the fact that most of the human actions are driven by an internal force or motivation which is not only uncontrollable but it is also only under the influence of one’s mind. Therefore it would be more favorable to change the overall mindset of people rather than implementing laws regarding gun control through an outside force. Evidence In order to understand the concept of gun control and why few individuals stand against this argument, it is substantial to first look at why the government agencies want to remove guns from the society. The answer to this lies in the current statistics of homicides and other criminal activities such as bank robbery, theft, kidnapping, etc. Guns are largely considered to facilitate the overall crimes especially homicide because of its distinguishing features (Myers). For in stance, it is significantly easier for a gun holder to kill someone from a distance. Similarly it is a very handy weapon which can be easily kept in pockets or in bags. People who are shot by these guns due to any reason undergo serious injuries which prove fatal most of the times. Therefore the legislation is forced to remove guns from societies and to limit its use so as to grant maximum protection to the citizens. However, the most important point which they fail to consider is the hidden mentality and the real attitude of people which compels them to get indulged into such crimes. For instance, if an individual has determined to kill someone then he could do that through a knife or other weapons as well, representing that guns are not a necessary element of criminal acts. This indicates that it is far better to work on the mentality and human nurture rather than gun control since the former would generate more substantial results on long term basis. Research and analysis of the subject clearly indicates that people who are in practice of using guns are of the point of view that the use of gun is actually not the real issue rather the problem lies in the attitude of people (Sherfinski). Gun possession and its use to save the dignity of an individual is the most significant constitutional right. However with the legislation of gun control, this right of the population is challenged while the real issue remains the same i.e. the ever increasing rate of crime. The seemingly simple elimination of guns from the society is in real the removal of protection and liberty of masses which will

Changing Role of the Product Designer from 18th Century to Now Essay

Changing Role of the Product Designer from 18th Century to Now - Essay Example Further more, as industrial firms flourished with their large production lines, there was always a search for new products and more productive processes to produce them. With the end of the craftsmen era and the beginning of the industrial era brought on by the new inventions there was a higher demand created for new products as living conditions improved. In the late 18th to the beginning of the 19th century new products was mostly developed by inventors. Inventors such as Frenchmen, B. Thimonnier (sewing machine), Francis Pettit Smith (propeller), Charles Babbage (mechanical calculator), Alexander Bain (facsimile), Hamilton Smith (washing machine) and Alfred Nobel (dynamite) to name but a few . Many of these inventions can still be found in our homes today. These inventers where mostly engineers, doctors or scientist, educated and trained in only one field. But as the industries expanded and several prominent firms was established in the 19th and early 20th century, these firms created their own design departments to create new and innovative products in order to stay competitive. Examples are Coca-Cola , Nestle , Ford and the Carrier Corporation to name but a few. Through their efforts the world saw the first six-pack, the chocolate bar, rolling production lines and air conditioning to name a few. Many organizations created design departments with dedicated designers to evaluate customer needs and then design products that will satisfy these needs. Due to the increased competition in the commercial world these departments will work on a range of products at any one time, to ensure profitability from those successfully introduced into the market. Designed products include diet soda, transistor radio (Texas Instruments), non stick pan, oral contraceptives, Barbie doll, etc Today product designs have an even more profound effect on bottom line of major companies. Although its impact may be difficult to quantify a UK trade association, the design council lodged a project to try and measure the payoff companies make from design products. The tracked the performance of 63 British companies who incorporated product design into their production processes. They measured the share price performance of these companies against the designer awards they received from 1994 to 2004. Their research indicated that these design companies outperformed the FTSE 100 and FTSE All Share indices by 200% over a ten year period. The results from their research strongly indicated that companies who invest more in product design are more likely to succeed in a competitive market. Image 2: Chris Bangle's Design for the new BMW 3 Series New Style Designers This new trend in product design created the need for new specialist in the field, and as organizations and education institutions aligned themselves to educate and train these new entries to the industry a new type of inventor was born. Product designers are trained in concept development, testing and manufacturing, and implementation. As these specialists entered the market, some went at it on their own. Designers such as Bill Moggridge a

Against gun control Research Paper Example | Topics and Well Written Essays - 1250 words

Against gun control - Research Paper Example Gun tragedies are frequently taking place throughout the world. Research indicates that only in United States of America the rate of gun homicides is 72% i.e. of every 100 homicides 72 are committed using guns (Stray). There are some people who are actually against the control of guns. Though they are very few in numbers yet their argument is far substantial as compared to those who are in favor of it. This paper aims to put forward the arguments from both sides while maintaining a firm position against it. Thesis Gun control is a significant need of today’s world in order to protect and safeguard humanity. However if one would closely analyze the overall situation then it is easy to identify that the real issue is not with the access and availability of guns, but rather the main problem is with the people and their peculiar mentality which compels them to harm or kill others. Therefore the present strategies related to gun control do not seem much beneficial and neither have they shown any decrease in the rate of crimes. People in favor of gun control usually emphasize upon the affects and influence of external environment. However, they neglect the fact that most of the human actions are driven by an internal force or motivation which is not only uncontrollable but it is also only under the influence of one’s mind. Therefore it would be more favorable to change the overall mindset of people rather than implementing laws regarding gun control through an outside force. Evidence In order to understand the concept of gun control and why few individuals stand against this argument, it is substantial to first look at why the government agencies want to remove guns from the society. The answer to this lies in the current statistics of homicides and other criminal activities such as bank robbery, theft, kidnapping, etc. Guns are largely considered to facilitate the overall crimes especially homicide because of its distinguishing features (Myers). For in stance, it is significantly easier for a gun holder to kill someone from a distance. Similarly it is a very handy weapon which can be easily kept in pockets or in bags. People who are shot by these guns due to any reason undergo serious injuries which prove fatal most of the times. Therefore the legislation is forced to remove guns from societies and to limit its use so as to grant maximum protection to the citizens. However, the most important point which they fail to consider is the hidden mentality and the real attitude of people which compels them to get indulged into such crimes. For instance, if an individual has determined to kill someone then he could do that through a knife or other weapons as well, representing that guns are not a necessary element of criminal acts. This indicates that it is far better to work on the mentality and human nurture rather than gun control since the former would generate more substantial results on long term basis. Research and analysis of the subject clearly indicates that people who are in practice of using guns are of the point of view that the use of gun is actually not the real issue rather the problem lies in the attitude of people (Sherfinski). Gun possession and its use to save the dignity of an individual is the most significant constitutional right. However with the legislation of gun control, this right of the population is challenged while the real issue remains the same i.e. the ever increasing rate of crime. The seemingly simple elimination of guns from the society is in real the removal of protection and liberty of masses which will

Astronomy Study Guide Essay Example for Free

Astronomy Study Guide Essay xix. All jovian planets have strong winds and storms 2. Be able to describe the different stages in stellar evolution and which star will end their lives in which ways. Included in this is the maximum masses of stars that will become white dwarfs, neutron stars, and black holes and the maximum masses of white dwarfs and neutron stars. e. Step 1- Becoming a Star xx. As a cloud collapses, the center becomes very, very hot and very dense f. Step 2- Fusion xxi. As the gas cloud collapses, the core becomes hotter and the density inside the core increases xxii. Eventually, the temperature and density reach a point where nuclear fusion can occur g. Step 3- Balance: all main sequence stars are in hydrostatic equilibrium xxiii. Fusion provides radiation that creates an outward pressure h. Protostar to Main Sequence xxiv. A protostar contracts and heats until the core temperature is sufficient for hydrogen fusion i. Upper Limit on a Star’s Mass 3. Understand everythi9ng about the HR diagram and how it can be used j. Identifies a definite relationship between temperature and absolute magnitude k. The smallest stars are the tiny white dwarfs and are found in the lower left corner of the diagram l. Main sequence stars span a range of sizes from the small found in the lower right and the large found in the upper left m. Largest stars are the giant and supergiant stars which are sound in the upper right corner n. Most stars fall somewhere on the main sequence o. Diagram Depicts xxv. Temperature xxvi. Color xxvii. Spectral Type xxviii. Luminosity xxix. Radius 4. Be able to describe the Doppler effect and indicate which stars are shifts the most from looking at the spectra of stars and from looking at the wavelength of peak radiation. p. The Doppler effect is able to determine the movement of objects in space. It can tell if the object is moving toward or away from earth. 5. What are the different types of galaxies and what are the different types and ages of stars that you would expect to observe in each q. Spiral xxx. Disk- stars of all ages, and many gas clouds xxxi. Bulge- old stars, few gas clouds xxxii. Halo- old stars, few gas clouds 1. Blue-White color indicates ongoing star formation 2. Red-Yellow color indicates older star population xxxiii. Barred Spiral Galaxy- has a bar of stars across the bulge xxxiv. Centicular Galaxy- has a disk like a spiral but much less dusty gas(intermediate between spiral and elliptical) r. Elliptical xxxv. All spherical components, virtually no disk component 3. Red-Yellow color indicates older star population s. Irregular xxxvi. Neither spiral nor elliptical 4. Blue-White indicates ongoing star formation 5. All tend to be really far away t. *Spiral galaxies are often found in groups 6. Use energy output vs. wavelength graphs to determine the size temperature and color of various stars. 7. Be able to choose the most cost effective option from a list of possible research telescopes u. Three Types of Telescopes xxxvii. Refracting Telescope-uses a glass lens to concentrate incoming light xxxviii. Reflecting Telescope-uses mirrors to concentrate incoming star light (most researching telescopes today are reflecting) xxxix. Radio Telescopes- sends radio waves into space 8. Give a general description of Big Bang theory and the evidence for it. v. In the 1940’s based on Hubble’s law, George Gamon proposed that the universe began in a colossal explosion w. In the 1950’s, the term Big Bang was coined be an unconvinced Sir Fred Hoyce x. Evidence for Big Bang xl. We have detected the background radiation from the Big Bang xli. Correctly predicts the abundance of helium and other light elements in universe xlii. The cosmic microwave background=the radiation leftover from the Big Bang xliii. Patterns of structure observed by WMAP show the â€Å"seeds† of the universe xliv. Abundance of elements give us clues as well 9. How does the force of gravity between two objects depend on mass and distance. y. Newton’s Law of Gravitation xlv. Two objects attract each other with a force that is directly proportional to the product of their own masses and is inversely proportional to the square of the distance z. Universal Law of Gravitation xlvi. Every mass attracts every other mass xlvii. Attraction is directly proportional to the masses xlviii. Attractions is inversely proportional to the square of the distance between their centers xlix. F=G(m1m2/d2) 10. What provides energy to stars at different points during their lifetime (proto-star, main sequence, red giant, etc†¦) 11. What can we know from the spectrum of a star {. We can determine whether the star is moving toward us or moving away from us. |. We can’t determine the exact speed of the star but we can determine whether it is moving fast or slow toward us and if it is moving fast or slow away from us 12. What is a Cepheid variable? }. Light curve shows that its brightness alternately rises and falls over a period of 50 days ~. With longer periods have higher luminosities 13. What does Hubble’s law say? . Velocity=H0 x distance 14. Compare the sizes of different objects in the solar system, in the galaxy, and in the universe. . The Sun is the largest object in the solar system . Earth VenusMarsMercurymoon 15. Compare the scales (relative distances) to various locations in the solar system, the galaxy, and the universe 16. What makes something science? How do you tell if something is a scientific theory, a hypotheses, or something else? . What is Science l. Seeks to understand the rules and laws of nature li. Uses systematic observations lii. Uses mathematical models liii. Experimentally tests ideas . A Scientific Theory must: liv. Explain a wide variety of observations with a few simple principles lv. Be supportive be a large compelling body of evidence lvi. Not have failed any crucial tests of its validity 17. List properties of thermal radiation. . Hotter objects emit more light at all frequencies . Hotter objects emit photons with a higher average energy . Nearly all large or dense objects emit thermal radiation including stars, planets, and you . An objects thermal radiation spectrum depends only on temperature 18. How do we know our position in the solar system, in the galaxy, and the universe? . Kepler’s Law lvii. Using Kepler’s law we are able to calculate the orbital speed of objects and compare them. lviii. To compare our location to the galactic center we use the Kepler’s Law Rotation curve, which plots an objects orbital speed against the distance from the galactic center. 19. Understand the phases of the moon. Be able to choose relative positions of the Earth, moon, and sun to produce a given moon phase. . 1st quarter . Waxing gibbous . Full moon . Waning gibbous . 3rd quarter . Waning crescent . New moon . Waxing crescent 20. Understand the major motions in the sky- over the course of a day, over the course of man y weeks/months, and over the course of years. 21. What causes seasons? . Earth’s axis points in the same direction all year, so its orientation relative to the sun changes as Earth orbits the sun . Summer occurs in your hemisphere when sunlight hits it more directly, winter occurs when sunlight hits it less directly . Axis tilt is the key to seasons without it we wouldn’t have seasons 22. Apparent and absolute magnitudes, what they tell us, and how they are used to determine distances. . Apparent Magnitude- how bright the object appears to us on earth . Absolute Magnitude- how bright it actually is lix. Negative means brighter lx. Positive means dimmer . By comparing apparent, and absolute magnitude numbers we can estimate the stars distance from earth lxi. When m=M, then the star is located exactly 10 pc away lxii. When mM, then the star appears dimmer than it would 10 pc away 23. List the different types of electromagnetic radiation and their relative wavelengths, and energies. 24. List the pattern of motion of the large objects in the solar system. . All large bodies orbit in the same direction and nearly the same plane . Most rotate in the same direction

Lone Parenting Social

Lone Parenting Social Definition The issue of lone parenting is quite clearly one that is of significant importance and impact in the modern social context. It is also one that has different viewpoints, which are important to recognise in the context of this report. While the actual term of ‘lone parenting is a given, it is important to understand the various views which are taken in order to address this problem. For example, ‘New Labours social policy towards lone parents is generally governed by the attitudes epitomised in the mantras â€Å"reforming welfare around the work ethic† and funding a system that â€Å"believes in empowerment not dependency† (Millar and Rowlingson, 2001, p xv). This quite obviously conflicts with the view which was held by previous governments, which is said to maintain the view that poverty is â€Å"relieved by cash handouts† (DSS, 1998, p 19). It is also said that the differences between these two viewpoints epitomises the differing views of ‘old Labour and ‘new Labour (Millar and Rowlingson, 2001, p xv), and also highlights the shift between the welfare state policy to a more capitalist approach to addressing the lone parenting issue. Main Issues Given the discussion of the United Kingdoms approach to lone parenting, it might be relevant to compare these provisions with those of other jurisdictions. Take, for example, New Zealand which categorises ‘solo parents as: (a) A woman who is the mother of one or more dependent children and who is living apart from, and has lost the support of, or is being inadequately maintained by, her husband: (b) An unmarried woman who is the mother of one or more dependent children: (c) A woman whose marriage has been dissolved by divorce and who is the mother of one or more dependent children: (e) A woman who is the mother of one or more dependent children and who has lost the regular support of her husband because he is subject to a sentence of imprisonment and is- (i) serving the sentence in a penal institution; or (ii) subject to release conditions or detention conditions (as those terms are defined in section 4(1) of the Parole Act 2002) that prevent him undertaking employment: (f) A man who is the father of one or more dependent children whose mother is dead or who for any other reason are not being cared for by their mother (Social Security Act 1964 (NZ), s 27B(1)). Arguably, in consideration of the above, it is clear that the New Zealand social security system is geared more towards caring for a woman who may be a lone parent, as opposed to a father. It might also be noted, however, that social security benefits are only paid to lone parents in New Zealand if the parent is of the minimum age of sixteen (16) years, unless emergency circumstances exist (Social Security Act 1964 (NZ), s 27B(2)). Compare this situation to that across the Tasman Sea in Australia, where the Australian Bureau of Statistics has recorded a three-fold increase in lone parenting families in the last thirty (30) years, from 7.1% in 1969 to 21.4% in 1999 (ABS census). However given this increase, it might also be worthwhile to note that lone parenting in Australia remains at lower levels than other English-speaking countries, but still higher than some countries in continental Europe (Millar and Rowlingson, 2001, p 61). Further to this, it has generally been the attitude of Australian governments to extend social security benefits to all classes of lone parenting families, irrespective of the cause of the lone parenting situation (Millar and Rowlingson, 2001, p 65). Around 47% of lone mothers were employed in 1999 and around 63% of lone fathers, and approximately 9% of both lone mothers and lone fathers were unemployed (ABS, June 1999). This perhaps symbolises a non-dependency on the welfare system, a nd that lone parents in Australia generally try to work at least part-time to supplement their welfare incomes and provide for their family. Key Dilemmas The key dilemma that has been the recurring theme throughout this paper is the need to balance income support and welfare with the need for non-dependence on the welfare system. There is a conscientious push by governments in the above countries to not encourage reliance upon welfare handouts and to push these people to seek active employment, but also recognises the various situations of lone parents who may be unable to work full time for any number of reasons. The United Kingdom obviously recognises this problem in a social context, and took steps to address it though social policy reform. Some say that this was a more ‘heavy handed approach to the social problem, and this argument may have some merit given the approaches of other countries. New Zealand prescribes certain circumstances where welfare can be paid, and Australia has a more liberal approach to the welfare system, however all of these approaches seem to function appropriately in their individual contexts. Conclusion In consideration of the above points, it is quite clear that lone parents are a significant social problem. However, the more prominent problem is that of how to address the issue. It is quite clear that the United Kingdom has a more recent history of reforming social policy on this issue and limiting the distribution of welfare benefits. Is this the most appropriate course of action? Some would suggest no, given the experience of other countries. However, regard needs to be had for the statistics: approximately one in four of Britains seven million families are headed by a lone parent, and less than four in ten lone parents in Britain work full time (which is a piecemeal 16 hours a week statistically) (Millar and Rowlingson, 2001, p 11). This only serves to fuel the debate further, and one needs to consider the legislative and policy-based approach of the United Kingdom in context before judgement on this issue can be passed. Bibliography Books Millar, J., and Rowlingson, K. (eds), Lone Parents, Employment and Social Policy (2001), Bristol: The Policy Press Journal Articles Hughes, J., ‘Lone Parents and Social Security (2005) 36 Victoria University Wellington Law Review 1 Soley, C., ‘Lessons of the Lone Parenting Battle (1997) 126 New Statesman. Legislation Social Security Act 1965 (NZ) Social Security Act 1991 (AU, Cth) Other Sources Australian Bureau of Statistics, June 1999 Australian Bureau of Statistics, census 1969 and 1999 DPI, census 1999

Sophocles Antigone - Creon and Antigone :: Antigone essays

Creon and Antigone Antigone   Sophocles   When a dictator dies, his image and fame dies with him, but when a self-sacrificing individual dies, their legacy begins.   This statement is true because oppressed citizens do not fondly mention a mean ruler, such as Creon from Antigone, after he passes away.   Yet a martyr, such as Antigone, also from the story Antigone, is remembered for her self-sacrificing deeds.   Creon will not be remembered because he did not allow Antigone to bury her dead brother Polynices, and decides to execute Antigone for trying while Antigone’s legacy will live on because she has the courage to defy Creon, and chooses to sacrifice herself for Polynices' honor.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   First, Creon is a tyrant.   His rule will not be remembered for many reasons, one being that he desecrates family honor.   When a son or father dies in battle, they are carried home to be properly buried by their families.   Eteocles, Antigone’s other dead brother, is a patriot and is buried because he fights for Thebes.   However, Polynices is not buried because he rebels against Thebes.   Creon leaves Polynices’ body out to be attacked by dogs and vultures.   This angers the people of Thebes because family honor is very important to them.   Therefore, the people of Thebes will not remember Creon because of his offensive deeds performed while he is on the throne.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Second, Creon will be forgotten because he decides to execute Antigone.   Her punishment is to be locked in a blocked cave until she dies.   Although later on in the story, Creon does decide to free her, it is too late.   The people of Thebes are astounded at the fact that Creon would even conceive of such a horrible punishment.   Antigone acted on family honor, which is understood. Therefore, his people will forget Creon.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Third, Antigone is a wonderful example of a martyr.   Her legacy will live on, and inspire many other rebels to stand up for their beliefs.   Antigone dared to defy the King’s threat of death to bury her brother, and shows true family pride.   The people take pity on Antigone, and feel that she should be let alone. Haemon, Creon's son and Antigone's betrothed, states how the people of Thebes feel. â€Å"On every side I hear voices of pity for this poor girl doomed to the cruelest death†¦for an honorable action-burying a brother who was killed in battle†¦has she not rather earned a crown of gold† (

Capital Punishment Essays †An Eye for an Eye -- Argumentative Persuas

Capital Punishment Essays – An Eye for an Eye Life is a precious gift from God. Even when a person has no material possessions, life is still possessed. In light of these observations it is logical to assume that murder, the taking of another's life, is the most heinous of crimes. Undeniably, penalties imposed upon criminals should match the crimes committed. Therefore, the worst crime possible, murder, should receive the worst penalty possible, death. One argument against the death penalty is the Bible tells us not to murder. Murder is the unlawful killing of one human being by another. The death penalty is the lawful killing of a human being after a trial by peers. So by definition the death penalty is not murder, but justice. Furthermore, as stated by Ed Koch, a former US Government official, "the execution of a lawfully condemned killer is no more an act of murder than is legal imprisonment an act of kidnaping". Finally, the sam...

Definitions Of Different Types Or Warefare History Essay

Three types of warfare preponderate in civil wars: a ) irregular warfare among unsymmetrically strong officeholders and weak insurrectionists[ 2 ], such as the Algerian civil war and the first stage of the Greek civil war. Contrary to rationally well-founded claims[ 3 ], irregular warfare is non married to inflexibly definite causes ( i.e. radical people ‘s war ) . Asymmetry besides is consistent with another type of force, terrorist act[ 4 ]. B ) regular warfare among symmetrically powerful officeholders and robust insurrectionists[ 5 ], such as the Spanish, American or Greek ( in the 2nd stage ) civil wars. External intercession for the insurrectionists may transform irregular into regular warfare, as in Vietnam war ‘s last stage. degree Celsius ) guerrilla warfare ( symmetric non-conventional[ 6 ]) among symmetrically dynamic officeholders and insurrectionists, such as the Liberian civil war, represented as condemnable or pre-modern type of warfare[ 7 ]. Empirically, frontlines ( e.g. urban roadblocks ) among contending groups distinguish this type of warfare from irregular warfare[ 8 ]. By and large, conventional-type civil wars result preponderantly from putschs d'etat ( i.e. Spanish civil war ) or secessionist motions against federal authoritiess ( i.e. American civil war ) ; irregular-type civil wars originate preponderantly from rural-type insurgences[ 9 ]( i.e. first stage of Chinese civil war ) ; symmetric non-conventional-type civil wars derive from authorities prostration ( i.e. Somali civil war )[ 10 ]. However, these three types of warfare might happen in same civil war in different stages. The heterogeneousness of semantic footings for irregular/guerrilla warfare denotes the repeating predicament for placing a typical class of war[ 11 ]. In fact, guerilla warfare exhibits about 38 nomenclature discrepancies[ 12 ]. No overarchingly precise definition of guerilla warfare has been elaborated in the literature about irregular/guerrilla warfare because this construct is embedded intellectually in a tradition of strategic thought and pattern, non a uniformly thorough definition[ 13 ]. The term â€Å" little war † in the seventeenth century designated civil war[ 14 ], â€Å" la petite guerre † in the eighteenth century denoted particular operations undertaken by particular forces incorporated in regular armed forces-destitute of ideological connotations- whose leaders ‘ names ( â€Å" zealots † ) labelled the groups ‘ members[ 15 ]. During the American Civil War and the Napoleonic Wars, â€Å" partizan warfare † blended crucially with political orientation ; in the Peninsular War, the â€Å" guerilla † signified transformationally non the â€Å" little war † but the Rebels in this â€Å" little war †[ 16 ]. In late nineteenth century, guerrilla/partisan warfare supplemented battles for national release or political revolution, whereas â€Å" little wars † marked the history of colonialism[ 17 ]. The Second World and Cold Wars buttressed a connexion between left-of-center motions and â€Å" radical people ‘s war † owing to communist relief in endeavoring against the Axis and Western colonial powers either for national release or proletarian revolution[ 18 ]. The Cold War ‘s terminal presaged the recession of â€Å" radical people ‘s wars † and the support of â€Å" insurgences † or â€Å" low strength struggles †[ 19 ]. The thorough survey of guerilla warfare is entangled by speculations that need disproval. First, although identified uniformly as the indispensable method of war of the â€Å" weak †[ 20 ], guerilla warfare belongs to the armory of the â€Å" strong † as the interventional usage of Contras against the Sandinistas in Nicaragua by Washington groundss. Second, guerrilla/irregular warfare encompasses non-state dissenters against province suspects, and province against province rivals[ 21 ]as the tactic of the Viet Cong to Hanoi ‘s benefit against Saigon demonstrates. Third, guerrilla/irregular warfare signifies a perennial -yet non paramount- trait of intrastate war[ 22 ]that manifests in guerrilla, conventional and symmetric non-conventional signifiers. Therefore, any antagonist can use guerrilla/irregular warfare in any type of war in chase of political aims[ 23 ]. What is insurgence and counter-insurgency? The U.S. Field Manual 3-24 Counterinsurgency determines insurgence in connexion to pacification as â€Å" †¦ an organized motion aimed at the overthrow of a established authorities through the usage of corruption and armed struggle ( JP 1-02 ) †¦ an insurgence is an organized, protracted politico-military battle designed to weaken the control and legitimacy of an constituted authorities, busying power, or other political authorization while increasing seditious control. Counterinsurgency is military, paramilitary, political, economic, psychological, and civic actions taken by a authorities to get the better of insurgence ( JP 1- 02 ) †¦ insurgence and COIN are included within a wide class of struggle known as irregular warfare. Political power is the cardinal issue in insurgences and pacifications ; each side aims to acquire the people to accept its administration or authorization as legitimate †[ 24 ]. Sir Robert Thompson, a British counter-insurgency theoretician and practician, determined the insurgence ‘s correlativity with political aims within a civil war â€Å" †¦ an insurgence, as a type of war, may take to and be portion of a big conventional struggle, revolution, or civil war. Insurgency, as a method of war, implies the effort to utilize force and irregular signifiers of warfare against a peculiar fraction ( s ) for the express intent of political-military addition, which may subsequently take to inclusion with, or the overthrow of, bing governments. †[ 25 ] David Galula, a Gallic counter-insurgency theoretician and practician, enunciated in similar footings that â€Å" An insurgence is a civil war. †[ 26 ] â€Å" The aim being the population itself, the operations designed to win it over ( for the insurrectionist ) or to maintain it submissive ( for the counterinsurgent ) are basically of a political nature†¦ political action remains first throughout the war †[ 27 ].

Study of Electromagnetic Clutch

ACKNOWLEDGEMENT It gives us great pleasure when a certain task is accomplished with great zeal and enthusiasm. We would like to extend our heartfelt thanks and deep sense of gratitude to all those who helped us in completing this project. First and foremost, we feel greatly indebted to Mr. D. M. SINGH and Mr. UBAID AHMAD KHAN, from the core of our heart for their constant support and valuable guidance time to time, because they encouraged and persuaded us to complete the project. We are also thankful to entire faculty members for their support.In order to complete the project we have taken help from various sites, books, study material etc. INTRODCTION A clutch is a mechanism for transmitting rotation, which can be engaged and disengaged. Clutches are useful in devices that have two rotating shafts. In these devices, one shaft is typically driven by motor or pulley, and other shaft drives another device. The clutch connects the two shafts so that they can either be locked together an d spin at the same speed (engaged), or be decoupled and spin at different speeds (disengaged). The clutch disc (centre) spins with the flywheel (left).To disengage, the lever is pulled (black arrow), causing a white pressure plate (right) to disengage the green clutch disc from turning the drive shaft, which turns within the thrust-bearing ring of the lever. Never will all 3 rings connect, with any gaps. TYPES OF CLUTCH DOG CLUTCH A dog clutch is a type of clutch that couples two rotating shafts or other rotating components not by friction but by interference. The two parts of the clutch are designed such that one will push the other, causing both to rotate at the same speed and will never slip.Dog clutches are used where slip is undesirable and/or the clutch is not used to control torque. Without slippage, dog clutches are not affected by wear in the same way that friction clutches are. Dog clutches are used inside manual automotive transmissions to lock different gears to the rota ting input and output shafts. A synchromesh arrangement ensures smooth engagement by matching the shaft speeds before the dog clutch is allowed to engage. Wet and dry A ‘wet clutch' is immersed in a cooling lubricating fluid, which also keeps the surfaces clean and gives smoother performance and longer life.Wet clutches; however, tend to lose some energy to the liquid. A ‘dry clutch', as the name implies, is not bathed in fluid. Since the surfaces of a wet clutch can be slippery (as with a motorcycle clutch bathed in engine oil), stacking multiple clutch disks can compensate for the lower coefficient of friction and so eliminate slippage under power when fully engaged. Cone clutch A cone clutch serves the same purpose as a disk or plate clutch. However, instead of mating two spinning disks, the cone clutch uses two conical surfaces to transmit torque by friction.The cone clutch transfers a higher torque than plate or disk clutches of the same size due to the wedging acti on and increased surface area. Cone clutches are generally now only used in low peripheral speed applications although they were once common in automobiles and other combustion engine transmissions. They are usually now confined to very specialist transmissions in racing, rallying, or in extreme off-road vehicles, although they are common in power boats. This is because the clutch doesn't have to be pushed in all the way and the gears will be changed quicker. Centrifugal clutchA centrifugal clutch is a clutch that uses centrifugal force to connect two concentric shafts, with the driving shaft nested inside the driven shaft. Centrifugal clutches are often used in mopeds, lawnmowers, go-karts, chainsaws, and mini bikes. Fluid coupling A fluid coupling is a hydrodynamic device used to transmit rotating mechanical power. It has been used in automobile transmissions as an alternative to a mechanical clutch. It also has widespread application in marine and industrial machine drives, where variable speed operation and/or controlled start-up without shock loading of the power transmission system is essential.Torque limiter It is also known as safety clutch. A torque limiter is an automatic device that protects mechanical equipment, or its work, from damage by mechanical overload. A torque limiter may limit the torque by slipping (as in a friction plate slip-clutch), or uncouple the load entirely (as in a shear pin). The action of a torque limiter is especially useful to limit any damage due to crash stops and jams. Torque limiters may be packaged as a shaft coupling or as a hub for sprocket or sheave. A torque limiting device is also known as an overload clutch. Electromagnetism What is an electromagnet?An electromagnet can be made by sending current through a coil of wire wound around an iron core. When current passes through a conductor, magnetic field will be generated around the conductor and the conductor become a magnet. This phenomenon is called electromagnetis m. Since the magnet is produced electric current, it is called the electromagnet. In short, when current flow through a conductor, magnetic field will be generated. When the current ceases, the magnetic field disappear. The direction of the magnetic field formed by a current carrying straight wire can be determined by the Right Hand Grip Rule or the Maxwell Screw Rule.What is magnetic field pattern? A magnetic field pattern can be represented by field lines that show the shape of the field. Magnetic field lines which are closed together represents strong field. Field direction is defined as the direction indicated by a compass needle placed in the magnetic field. Force on current carrying conductor If a current carrying conductor is placed in a magnetic field produced by permanent magnets, then the field due to current carrying conductor and the permanent magnets interact and cause the a force to be exerted on the conductor .The force on the current carrying conductor in a magnetic field depends on:- 1. The flux density of the field, B teslas 2. The strength of current, I amp 3. The length of the conductor perpendicular to the magnetic field 4. The direction of the field and current When the magnetic field, the current and the conductor are mutually perpendicular to each other then force exerted: F=IBL Newton When the conductor and magnetic field are at an angle, then the force exerted: F=IBLsin? Where; I=current, B magnetic field, L=Length of conductor ?-angle between conductor and magnetic field.Right Hand Grip Rule Grip the wire with the right hand, with the thumb pointing along the direction of the current. The other fingers give the direction of the magnetic field around the wire. The Maxwell's Screw Rules The Maxwell Screw Rules sometime is also called the Maxwell's Corkscrew Rule. Imagine a right handed screw being turn so that it bores its way in the direction of the current in the wire. The direction of rotation gives the direction of the magnetic fie ld. Electromagnetic clutch Electromagnetic clutches operate electrically, but transmit torque echanically. This is why they used to be referred to as electro-mechanical clutches. CONSTRUCTION A horseshoe magnet has a north and south pole. If a piece of carbon steel contacts both poles, a magnetic circuit is created. In an electromagnetic clutch, the north and south pole is created by a coil shell and a wound coil. In a clutch, when power is applied, a magnetic field is created in the coil. This field (flux) overcomes an air gap between the clutch rotor and the armature. This magnetic attraction, pulls the armature in contact with the rotor face.The frictional contact, which is being controlled by the strength of the magnetic field, is what causes the rotational motion to start. The torque comes from the magnetic attraction, of the coil and the friction between the steel of the armature and the steel of the clutch rotor. For many industrial clutches, friction material is used between the poles. The material is mainly used to help decrease the wear rate, but different types of material can also be used to change the coefficient of friction (torque for special applications).For example, if the clutch is required to have an extended time to speed or slip time, a low coefficient friction material can be used and if a clutch is required to have a slightly higher torque (mostly for low rpm applications), a high coefficient friction material can be used. In a clutch, the electromagnetic lines of flux have to pass into the rotor, and in turn, attract and pull the armature in contact with it to complete clutch engagement. Most industrial clutches use what is called a single flux, two pole design. Mobile clutches of other specialty electromagnetic clutches can use a double or triple flux rotor.The double or trip flux refers to the number of north/south flux paths, in the rotor and armature. This means that, if the armature is designed properly and has similar banana slot s, what occurs is a leaping of the flux path, which goes north south, north south. By having more points of contact, the torque can be greatly increased. In theory, if there were 2 sets of poles at the same diameter, the torque would double in a clutch. Obviously, that is not possible to do, so the points of contact have to be at a smaller inner diameter.Also, there are magnetic flux losses because of the bridges between the banana slots. But by using a double flux design, a 30%-50% increase in torque, can be achieved, and by using a triple flux design, a 40%-90% in torque can be achieved. This is important in applications where size and weight are critical, such as automotive requirements. The coil shell is made with carbon steel that has a combination of good strength and good magnetic properties. Copper (sometimes aluminium) magnet wire, is used to create the coil, which is held in shell either by a bobbin or by some type of epoxy/adhesive.To help increase life in applications, f riction material is used between the poles on the face of the rotor. This friction material is flush with the steel on the rotor, since if the friction material was not flush, good magnetic traction could not occur between the faces. Some people look at electromagnetic clutches and mistakenly assume that, since the friction material is flush with the steel that the clutch has already worn down but this is not the case. Clutches used in most mobile applications, (automotive, agriculture, construction equipment) do not use friction material.Their cycle requirements tend to be lower than industrial clutches, and their cost is more sensitive. Also, many mobile clutches are exposed to outside elements, so by not having friction material, it eliminates the possibility of swelling (reduced torque), that can happen when friction material absorbs moisture. HOW DOES IT WORKS The clutch has four main parts: field, rotor, armature, and hub (output) . When voltage is applied the stationary magne tic field generates the lines of flux that pass into the rotor. (The rotor is normally connected to the part that is always moving in the machine. The flux (magnetic attraction) pulls the armature in contact with the rotor (the armature is connected to the component that requires the acceleration), as the armature and the output start to accelerate. Slipping between the rotor face and the armature face continues until the input and output speed is the same (100% lockup). The actual time for this is quite short, between 1/200th of a second and 1 second. Disengagement is very simple. Once the field starts to degrade, flux falls rapidly and the armature separates.One or more springs hold the armature away from the rotor at a predetermined air gap. Engagement time There are actually two engagement times to consider in an electromagnetic clutch. The first one is the time that it takes for a coil to develop a magnetic field, strong enough to pull in an armature. Within this, there are two factors to consider. The first one is the amount of ampere turns in a coil, which will determine the strength of a magnetic field. The second one is air gap, which is the space between the armature and the rotor. Magnetic lines of flux diminish quickly in the air..Air gap is an important consideration especially with a fixed armature design because as the unit wears over many cycles of engagement the armature and the rotor will create a larger air gap which will change the engagement time of the clutch. In high cycle applications, where registration is important, even the difference of 10 to 15 milliseconds can make a difference, in registration of a machine. Even in a normal cycle application, this is important because a new machine that has accurate timing can eventually see a â€Å"drift† in its accuracy as the machine gets older.The second factor in figuring out response time of a clutch is actually much more important than the magnet wire or the air gap. It involves cal culating the amount of inertia that the clutch needs to accelerate. This is referred to as â€Å"time to speed†. In reality, this is what the end-user is most concerned with. Once it is known how much inertia is present for the clutch to start then the torque can be calculated and the appropriate size of clutch can be chosen. Most CAD systems can automatically calculate component inertia, but the key to sizing a clutch is calculating how much inertial is reflected back to the clutch or brake.To do this, engineers use the formula: T = (wk2 ? ?N) / (308 ? t) Where T = required torque in lb-ft, WK2 = total inertia in lb-ft2, ? N = change in the rotational speed in rpm, and t = time during which the acceleration or deceleration must take place. There are also online sites that can help confirm how much torque is required to accelerate a given amount of inertia over a specific time. Circuit design and analysis OBJECTIVE A control circuit is to be designed to control the motor and drive unit. The Design specifications are to be fully implemented.An incomplete circuit and equipments are given and once it is understood appropriate values for the different components should be decided. These values should allow the circuit to perform as specified. Design Specification A circuit is to be designed which is 1. Allows the angular speed of the motor to build up to a value of 20 revolutions per minute (rpm), in a time of 2 seconds (s). 2. Maintains the angular speed of 20 rpm for a time of 3s. 3. When clutch pedal is pressed it brings the machine to a halt in a time of 1s. 4.Builds up the angular speed again to 20 rpm, in a time of 2s, except this time in the opposite direction. 5. Maintains the angular speed of 20 rpm for a time of 6s. 6. Brings the machine to a halt in a time of 1s. 7. Repeats the cycle above (1-6) indefinitely when powered on. The motor must not be in dynamic braking mode at the same time as it is being driven. CIRCUIT OPERATION The initial design for the complete circuit is shown below. All references to components refer to this circuit diagram. * ANALOGUE SECTION When power is supplied to the circuit the 555 Timer switches on and its output pulses high.The initial high pulse is longer because the 555 Timer is initially at 0V. The capacitor C3 usually charges from 1/3Vcc to 2/3Vcc. However initially it has to charge from 0V to 2/3Vcc. The duration of this initial high pulse is ta = 1. 1(R6 + R7)*C3 After the initial high pulse a constant charge time is the capacitor charge time is given as tc= 0. 693(R6 + R7)*C3 (1) The output of the timer is brought up to +5V by R5. Pin 3 of the 555 Timer is at +5V when the output is at logic high.TR2 is then forward biased due to the fact that it is a NPN transistor and its collector is grounded. TR2 has a base current limiter R4. TR1 has a base current limiter R2. Transistor TR1 is now reversed bias (i. e. it is open circuited) and C1 now charges up via resistor R1. As a result the motor turns on. If suitable values of resistor R1 and capacitor C1 are used then the required waveform will be obtained for the analogue output. The duration of this low pulse is td= 0. 693(R7)*C3 (2) Pin 3 of the 555 Timer goes to 0V.TR2 is then reverse biased due to the fact that it is a NPN transistor and its collector is at +5V. Transistor TR1 is now forward biased (i. e. it is short-circuited) and C1 now discharges. The motor is now switched off. * Digital Section The voltage at the collector of TR2 provides the input clock pulse for IC2, which is configured so that it is triggered on the rising edge. Both the inputs A1 and A2 are always grounded. When the output from pin 3 of the 555 Timer is high the transistor TR2 forward biased. Therefore the input to IC2 is high. It is seen that when this occurs the output Q is high.This in turn becomes a clock signal for the J-K flip- flop (IC3) and provides Logic 1 on one of the OR-gate inputs of IC4. After IC2 is triggered, it remains high fo r a time determined by the formula tw= C2*R8*ln2 (3) C2 and R8 control the length of time of braking as well as switching the direction of the motor. When IC2 is reset a pulse is sent to the negative edge triggered J-K flip-flop (IC3). From the Data sheet for (IC3) it is seen that with the clear high and both the inputs J and K high the JK toggles.Assuming that the initial state of (IC3) is Q = 1 and Q = 0, A is initially at logic 0 and B is at logic 1. Therefore the motor will rotate to the left in an anti-clockwise direction. When IC 2 is being triggered logic 1 will be applied to both of the OR-Gates of IC4. As a result A and B will be high. The motor will now be in dynamic braking mode. When the IC 2 is reset, Q now is logic zero and Q is logic high. Therefore A will be high and B will now be zero. The motor will now run in a clockwise direction. When the IC 2 is re-triggered it will again be in dynamic braking mode.Circuit Simulation PSpice Before building the circuit that the group had modified and it was necessary to simulate its operation to see if the design we had would work correctly i. e. within the parameters. The simulation was carried out in an electrical simulation package Pspice. Pspice is a useful design tool that allows the testing of electrical circuits without the necessity to build them. It allows designs to be modified quickly and easily so that new ideas and improvements can be incorporated, before the circuit is constructed.This saves time and a considerable part of the effort when de-bugging the wiring and operation of the circuit. There were a number of reasons that the group simulated the circuit before going to the actual building stage. The main advantage was that Pspice allowed us to use theoretical values for components so we could get the timing of the circuit-very important in this case- exactly right. Although this does not mean that ‘ideal’ components may be used in practice it allowed us to narrow the range of available components that were required. This saved time when building and testing the circuit.Another advantage was that the wiring of ICs (Integrated circuit) was made simpler because we could use the Pspice schematics as a visual aid COMPONENTS USED Resistors The resistor's function is to reduce the flow of electric current. This symbol is used to indicate a resistor in a circuit diagram. There are two classes of resistors; fixed resistors and the variable resistors. They are also classified according to the material from which they are made. The typical resistor is made of either carbon film or metal film. There are other types as well, but these are the most common.Fixed ResistorsA fixed resistor is one in which the value of its resistance cannot change. Carbon film resistorsThis is the most general purpose, cheap resistor. Usually the tolerance of the resistance value is  ±5%. Power ratings of 1/8W, 1/4W and 1/2W are frequently used. Carbon film resistors have a disadvantage ; they tend to be electrically noisy. Metal film resistors are recommended for use in analog circuits. The physical size of the different resistors is as follows. METAL FILM RESISTOR| | Metal film resistors are used when a higher tolerance (more accurate value) is needed.They are much more accurate in value than carbon film resistors. They have about  ±0. 05% tolerance. They have about  ±0. 05% tolerance. Resistors that are about  ±1% are more than sufficient. Ni-Cr (Nichrome) seems to be used for the material of resistor. The metal film resistor is used for bridge circuits, filter circuits, and low-noise analog signal circuits. From the top of the photograph 1/8W (tolerance  ±1%) 1/4W (tolerance  ±1%) 1W (tolerance  ±5%) 2W (tolerance  ±5%)| Rough size| Rating power (W)| Thickness (mm)| Length (mm)| | | 3| 1/4| 2| 6| 1| 3. 5| 12| 2| 5| 15| |VARIABLE RESISTORThere are two general ways in which variable resistors are used. One is the variable resistor which value is eas ily changed, like the volume adjustment of Radio. The other is semi-fixed resistor that is not meant to be adjusted by anyone but a technician. It is used to adjust the operating condition of the circuit. Capacitors The capacitor's function is to store electricity, or electrical energy. The capacitor also functions as a filter, passing alternating current (AC), and blocking direct current (DC). This symbol is used to indicate a capacitor in a circuit diagram.The capacitor is constructed with two electrode plates facing each other, but separated by an insulator. When DC voltage is applied to the capacitor, an electric charge is stored on each electrode. While the capacitor is charging up, current flows. The current will stop flowing when the capacitor has fully charged. Electrolytic Capacitors (Electrochemical type capacitors) The most important characteristic of electrolytic capacitors is that they have polarity. They have a positive and a negative electrode. [Polarised] This means that it is very important which way round they are connected.If the capacitor is subjected to voltage exceeding its working voltage, or if it is connected with incorrect polarity, it may burst. It is extremely dangerous, because it can quite literally explode. Make absolutely no mistakes. Generally, in the circuit diagram, the positive side is indicated by a â€Å"+† (plus) symbol. Electrolytic capacitors range in value from about 1 µF to thousands of  µF. Ceramic capacitors Ceramic capacitors are constructed with materials such as titanium acid barium used as the dielectric. Internally, these capacitors are not constructed as a coil, so they can be used in high frequency applications.Typically, they are used in circuits which bypass high frequency signals to ground. These capacitors have the shape of a disk. Their capacitance is comparatively small. TRANSISTORSThe transistor's function is to amplify an electric current. Many different kinds of transistors are used in ana log circuits, for different reasons. This is not the case for digital circuits. In a digital circuit, only two values matter; on or off. The amplification abilitiy of a transistor is not relevant in a digital circuit. In many cases, a circuit is built with integrated circuits(ICs). Transistors are often used in digital circuits as buffers to protect ICs.For example, when powering an electromagnetic switch (called a ‘relay'), or when controlling a light emitting diode. (In my case. ) Two different symbols are used for the transistor. PNP type and NPN type INTEGRATED CIRCUITSAn integrated circuit contains transistors, capacitors, resistors and other parts packed in high density on one chip. Although the function is similar to a circuit made with separate components, the internal structure of the components are different in an integrated circuit. The transistors, resistors, and capacitors are formed very small, and in high density on a foundation of silicon.They are formed by a v ariation of printing technology. There are many kind of ICs, including special use ICs. DIODEA diode is a semiconductor device which allows current to flow through it in only one direction. Although a transistor is also a semiconductor device, it does not operate the way a diode does. A diode is specifically made to allow current to flow through it in only one direction. Some ways in which the diode can be used are listed here. A diode can be used as a rectifier that converts AC (Alternating Current) to DC (Direct Current) for a power supply device.Diodes can be used to separate the signal from radio frequencies. Diodes can be used as an on/off switch that controls current. This symbol is used to indicate a diode in a circuit diagram. The meaning of the symbol is (Anode)(Cathode). Current flows from the anode side to the cathode side. RELAYThe relay takes advantage of the fact that when electricity flows through a coil, it becomes an electromagnet. The electromagnetic coil attracts a steel plate, which is attached to a switch. So the switch's motion (ON and OFF) is controled by the current flowing to the coil, or not, respectively.A very useful feature of a relay is that it can be used to electrically isolate different parts of a circuit. It will allow a low voltage circuit (e. g. 5VDC) to switch the power in a high voltage circuit (e. g. 100 VAC or more). The relay operates mechanically, so it can not operate at high speed. | WIRING MATERIALWire is used to electrically connect circuit parts, devices, equipment etc. There are various kinds of wiring materials The different types of wire can be divided largely into two categories: single wire and twisted strand wire, single wire is used to connect devices (resistors, capacitors etc. together on the PWB. It is also used for jumper wiring. Twisted strand wire can bend freely, so it can be used for wiring on the PWB, and also to connect discrete pieces of equipment. If single wire is used to connect separate equip ment, it will break soon, as it is not very flexible. It is convenient to use the single tin coated wire of the diameter 0. 32 mm for the wiring of PWB. If the diameter is larger, soldering becomes a little bit difficult. And if the diameter is too thin, it becomes difficult to bend the wire the way you want it to stay.DiscussionsElectro-Magnetic CompatibilityElectromagnetic compatibility is a field which is becoming ever more important in the modern world as the use of electronic devices becomes even more widespread. It refers to the effect of electromagnetic waves on an electrical device and the degree to which this device affects other devices in the neighbourhood. This interference can act in a number of ways. Conduction – the interference occurs because of a current flow into the circuit from an external source or from one part of the circuit to another via an unintended path. e. g. a loose wire.Inductive coupling – the interference is caused by a magnetic field i n the neighbourhood of the device. This can affect the electrons flowing in the wires of the device. Capacitive coupling – the interference is caused by an electric field in the vicinity of the device. This also affects the current flowing in the device. Radiation – this type of interference is caused by waves in the electromagnetic spectrum. One example of this is radio waves being affected by radiation from a nearby mobile phoneIn the control circuit for the de-burring machine there were very few sources of EM interference.The voltage levels used meant that any waves generated would probably not be of sufficient power to affect external devices. The time was not available to measure the interference being generated by the control circuit but if a real company was planning to develop this product they would have to test it thoroughly to ensure that no compatibility problems would exist under normal operating conditions. For example in a factory environment it is possi ble that the circuit could be placed near sensitive devices such as computers.The reverse is also true the manufacturer must check to ensure that the circuit is not adversely affected by the other forms of EM interference generated in the workplace by devices such as robots, air conditioning systems and motors. One advantage of the control circuit for the de-burring machine is that it is very compact so it would therefore not be too expensive to construct a case which would shield the device from external sources of EM waves and also contain any emissions generated by the device. It would also be possible to put a filter on the analogue output from the circuit to remove any noise being picked up by the circuit.This would ensure that the analogue output was not seriously affected; however it is not really necessary. The analogue output level for the device was chosen to be 1. 2V because this gives a relatively low RPM however it could be raised so that any noise picked up would only alter the analogue output by a very small percentage. The gearing could then be adjusted to give the correct speed. The largest source of EM emissions from the de-burring machine would probably be the motor itself. This is because of the magnetic fields generated by the rotor and stator coils.As stated on the motor data sheet no testing has been carried out on the EMC of the motor but no effect has been noticed on the circuit. The simplest solution to any problems caused by the motor would be to place some form of shielding around the motor or to place the motor a distance away from the control circuit. GearingThe motor and control unit used in the construction of the circuit was not suitable for operation at the low RPM required for the drum of the de-burring machine. The lowest voltage possible speed input to the control unit was 500 rpm when the input voltage was 1V.In order to scale down the speed of the drum it was decided to use a gearing unit. In order to meet the specificati ons of the design brief it is required to drop the speed of the motor to 20rpm. Given the current design of the circuit the output voltage of 1. 2V gives a speed of 800rpm. This means that a gear ratio of 800:20 or 40:1 is required. This can be achieved by using two gear wheels with diameters in the ratio 40:1 but this would not be practical as it would require one wheel to be a great deal larger than the other. Using 2 gear wheels would also result in the drum turning in the opposite direction and this is undesirable.Gear TrainsAnother possible gear combination to achieve the required reduction in speed would be to use three cogs. The first two would be in the ratio 8:1 and then the second two in the ratio 5:1. To achieve this a ‘gear train’ would have to be formed as shown in figure 5. 1. This would save space and also correct the problem of the drum rotating in the wrong direction as the second cog would reverse the direction then the third would return it to normal. Planetary GearingAn even more compact method of gearing would be to use what is known as a planetary gear.In this type of gearing mechanism the smaller cogs are fitted inside the larger cogs as shown in figure 5. 2 below. The red cogs are held stationary and the yellow gear is connected to the input. This saves space by having the input and output on the same axis and also makes the mechanism more robust by using three central gears instead of one. This would reduce the servicing required by the machine which is an important consideration in industry. The red and yellow gears would be in the ratio of 5:1 and the blue and red gears would have to be in the ratio 8:1 to give the required 40:1 reduction.Worm GearsThe final type of gear to be considered is the worm gear (figure 5. 3). In this system the reduction factor can be very large which would allow one cog to make the 40:1 reduction? Worm gears also have the useful property of being one way. The angle between the worm and the gea r teeth is such that the worm can turn the gear but the gear cannot be used to turn the worm. This would be particularly useful as an additional form of braking for the drum of the de-burring machine however the circuit would have tobe re-designed to slow the analogue output from its full voltage to zero gradually.If this were not done the gears would lock when the motor stopped and the sudden jerk would place a great stress on the components. If the circuit was to be re-designed as suggested the dynamic braking of the motor would be redundant. Improvements to DesignAfter completion of the circuit it was evident that a number of improvements could be made to the design that would make the circuit more versatile or better suited to its task. These will be covered in this section with the aim of showing possible routes for further development of the circuit. Had time permitted some of these could have been tried in the laboratory.Perhaps the simplest of the possible routes for improvi ng the circuit is the replacement of resistors R6 and R6 with variable resistors. This would allow the forward and reverse times for the drum spinning to be altered. In this way the most suitable length of time for the parts to be de-burred can be found without the need to re-build the circuit. It would also mean that different components, requiring different lengths of time, could be de-burred in the same machine, although not at the same time. This would allow the machine to be more flexible and save the company money.By using variable resistors the times could also be fine tuned to compensate for any errors in the timing caused by the tolerances of the components used and also any extra resistance caused by the non-ideal nature of the components. Another improvement to the design would be to eliminate the extended first pulse from the 555 timer which causes the drum to rotate longer on its first cycle. Because the pulse is part of the operation of the 555 timer it is hard to alte r before it affects the analogue out so one solution would be to have some form of clutch system between the drum and motor.This would disengage the drum from the motor at start-up and not allow the drum to be turned until after the first cycle. Some form of circuit could be designed to control the clutch and only engage the motor after the first cycle has passed. Another alternative would be to have the clutch only engage after a set time equal to the duration of the first cycle. This could either be a mechanical or electrical timer and would be required to engage the clutch after 7. 746†¦ +1+8=16. 75sec. Some form of switch could also be incorporated into the circuit to reset the JK flip-flop each time the circuit is switched on.This ensures that the flip-flop always starts in the correct state and that the motor is always turning in the right direction for its first rotations. This switch would also allow the cycle to be restarted without turning the power off. Such a functi on could be simply implemented by connecting the reset pin to +5V via a switch. A final consideration when improving the circuit would be to alter the switching circuit for R6 in such a way that one resistor is always connected and connecting a second resistor in parallel with it alters the total resistance as shown in figure A.A-Alternative Switching CircuitPractical ConsiderationsWhile the motor circuit worked as required in the laboratory test, a number of other factors must be brought into consideration when the circuit is being designed for use in industry. One of the major factors has already been discussed in the section on EMC but there are many more will be briefly covered in this section. One of the most obvious differences between the test equipment and an industrial system is the motor being driven.For safety reasons the motor connected to the circuit was a low power motor but to drive a large drum a larger motor with a higher torque would be required. While the controll er card used can only support motors with an operating voltage up to 30V, a similar controller could be designed to operate at much higher output voltages while still being run off of the same circuit. Another possibility would be to run a number of motors off of on control circuit. This would allow a much greater number of parts to be de-burred without the need for an exceptionally large drum. This would introduce the problem of fan-out however.The relatively low analogue output voltage of 1. 2V would have to be increased if a large number of controller cards were to be driven. The same is true of the voltages from the OR gates controlling direction. This is problem is easily rectified by using op-amps to boost the voltage. When the system is being used in a factory environment there are also a number of environmental issues to be deal with. There could be a great deal of dust or fine particles of metal in the air from the de-burring process, it is also possible that in an automate d process the factory may not be heated.Placing the control circuit in a sealed container can resolve some of these issues, as this will prevent dust from affecting its operation. It would also be possible to incorporate shielding into this casing to improve EMC. The temperature issue is not very important, as it is unlikely that the operating ranges of the IC would be exceeded. For 74 series chips this is in the region of 0-70? C and 54 series chips have an operating range of about –50-120? C. The final consideration when constructing a system for industry would be ease of manufacture.If a large number of these machines were required the circuit would have to be laid out in such a way that it could be easily constructed on printed circuit boards. There are computer programs available to aid the designer in this process and it would be unlikely to cause a major problem. ConclusionsHaving designed and constructed the circuit it was felt that it met all of the given specificati ons although there were still a number of improvements that could have been made. These improvements have been covered briefly in the discussion section and given more time they could have been implemented in the circuit.As already mentioned the only specifications not met were that on start-up the machine should rotate for 3 seconds in one direction before braking and reversing. Using the clutch method mentioned in the discussions could solve this but the design brief given did not extend to cover the drum so has not been included in the final design. During the course of the project a number of other points became evident which greatly ease the process of designing an electronic circuit. Simulation using a computer package such as Pspice saves a considerable amount of time by allowing the circuit to be easily laid out and tested.Any changes required can be made easily without disturbing the rest of the circuit. Another advantage of Pspice is the ability to produce graphs of the ou tputs from the circuit, which can then be scaled, formatted and printed as required. To do this for the actual circuit requires very specialised and expensive equipment. In conclusion, the group felt that all objectives had been met and that the final circuit was successful in fulfilling its role. A number of important lessons were learned about the problems involved in designing a circuit to meet a real-world need and ways of overcoming these problems were found.BILL OF MATERIALS S. NO. | ITEMS| Quantity| PRICE | 1. | motor| 1| | 2. | Diode | | | 3. | capacitor| | | 4. | 555 timer| | | 5. | Relay switch| | | 6. | Coils| | | 7. | resistances| | | 8. | transformer| | | 9. | Wiring materials| | | 10. | Integrated circuit| | | 11. | Wiring board| | | References[1] Schematic Capture with Microsim Pspice Herniter Prentice Hall 3 Ed. Rd P250-252[2] http://www. emclab. umr. edu/An Introduction to EMCUniversity of Missouri-Rolla EMC laboratory[3] http://reality. sgi. com/csp/scvemc/emcdef. tmlEnsuring Compatibility Between the Electromagnetic Environment and Electric and Electrical Devices Kimball William, Chairman, IEEE EMC Education Committee[4] http://www. howstuffworks. com/gears. htmHow gears Work[5]www. scribd . com[6]www. mechanicalprojects. comBackground Reading * Digital Fundamentals Floyd Prentice Hall 7 Edition t h. * Introductory Circuit Analysis Boylestad Prentice Hall 9 Edition t h. * Machine Design – R. K. Rajput. * Kinematics Of Machine – R. S. khurmi. * Automobile Engineering – R. K. Rajput | | |