The buccaneer journal of Dampier Essay Example | Topics and Well Written Essays - 500 words

The buccaneer journal of Dampier - Essay Example The text was published in the name of â€Å"A New Voyage Round the world†. William Dampier has a unique regard as well: he circumnavigated the earth thrice in his life (Dampier). In the underlying text which was published in 1700, William Dampier expressed about nature and romance in the context of deep sea and oceans. He titled his work as a composition of mixed relations among places and actions (Pirates & Privateers). It was a strange phenomenon of the time which was unbelievable to be curtained that it could be published even being a very scholastic and romantic piece of writing describing nature of piracy or buccaneering. The former buccaneers were the hunters who resided at Hispaniola and Caribbean. At the time of William Dampier, he encountered with the buccaneers who were formerly log wood cutters. He found them when he got a job to bring logwood to London via boat (Dampier). During his travel for working, he was used to spend his time in search and exploration of several aspects of natural, plants and animals. As he used to surround around the deep blue sea, so his most concern was water related nature. He wrote a number of valuable daily records in his journal which afterwards came in to being as a book named â€Å"A new voyage round the world†. Dampier was so happy that he could form his fortune with the work through which he could earn as well as he could spend a plenty of time in non work activities like nature exploration. But meanwhile a storm came around all the way and caused huge damages. It forced Dampier to take accompany with some privateers. Throughout his text of new voyage, William Dampier has referred to a term named as privateers. But in fact these privateers were the real buccaneers or pirates. Dampier spent over a year with those privateers (in real pirates). He wrote details of only one attack of those buccaneers. They were caught on that raid but they however managed the escape from

Choosing a Right University Essay Example for Free

Choosing a Right University Essay Choosing a university is a serious life-decision, because a university is a model of the real world and a place to stay for four years. In a university, we can chase for genuine knowledge, expand social networking, and learn about how to interact with people, etc. If we choose the wrong school, we might miss a lot of opportunities to learn and experience. In order to choose the right university, we have three important factors to consider: academic resources, activity resources, and accessibility. Since studying is the first priority for a university student, there is no doubt that we should first consider whether the school contains the academic resources that fit our interest . On one hand, if the students have interests in disciplinary fields, then they should choose a comprehensive university instead of a single field university. On the other hand, for students who have interest in specific field, they should choose the school that is dominant in that particular field. That is to say, to investigate whether the school owns the academic capability of the field that we are curious about is vital. Besides studying, how the students spend their free time is the second important factor to think about. Do the students spend all their spare time fooling around, or play on-line games? Or do they have various opportunities to experience life? In other words, we have to know whether the school offers chances of meaningful experiences for student to explore the world, such as international conferences, enlightened speeches, exchange programs, volunteering works and student clubs, etc. After viewing academic and extracurricular resources provided by the school, we can then take a look at the accessibility of the school. The reason why the accessibility of school need to be considered carefully is because there are still lots of things happen out of the campus. For example, exhibitions, intern, and speeches etc. all take place in the city center. As a result, we need to check whether we have the convenient access to the city center, for having chances to get connection with the real world. Choosing an ideal university is a complicated matter, but follow the factors which mentioned above might help us cross out some unsuitable options. To conclude, first is to know about the academic background of the school, then to see what extracurricular opportunities the school offers, and finally to know whether the access from to the real world is convenient or not.

Effects of Magnetic Fields Produced from Long Wires

Effects of Magnetic Fields Produced from Long Wires Faradays Law Laboratory Exercise An investigation into the effects of magnetic fields produced from long wires and comparison of theoretical and experimental results through the use of Amperes Law and Faradays Law Contents 1. Summary 2. Introduction 2.1 Introduction to Method 2.1.1 Apparatus 2.1.2 Procedure 3. Results 3.1 Single Wire Experiment 3.2 Single wire experiment with Ferrite Core 3.3 Double Wire Experiment 4. Discussion 5. Conclusion 6. References Appendix A Raw Data Electromagnets and the magnetic fields that they produce provide the foundations for the development of various major industries in modern society, including medicine, transport and robotics. However, there can be inaccuracies with their use caused by a phenomenon known as Electromagnetic Interference (EMI). In this experiment, a search coil was placed near a fixed wire with a current flowing through it, and the induced voltage across the coil was measured and recorded as the coil was moved away from the wire to investigate the effect of distance on the magnitude of the magnetic flux while the effects of a ferrite core on the magnetic field produced were also explored. The experimental and theoretical results highlighted the same trends, confirming the expectation that an increase in distance would cause a decrease in the magnitude of magnetic flux. The differences in results can be considered due to EMI from the return connection, which can induce unwanted voltages in the circuit. A magnetic field is the region in the neighbourhood of a magnet, electric current or changing electric field in which magnetic forces are observable. (1) An electromagnetic field is the form of magnetic field generated by the flow of electric current; it is caused by the movement and acceleration of the electrons. (2) Electromagnets play an important role in the continued development of many major industries, while there are already numerous useful applications of them in modern society. The electromagnetic fields they produce are vital in: medical practises such as MRI scans where they are used to alter the alignment of hydrogen atoms in the body (3); the production of high-speed Maglev trains which eliminates friction by allowing the train to levitate (4) and the continued scientific research into superconductors and rapid acceleration which provides the basis for particle accelerators. (5) However, constantly changing electromagnetic fields, especially in electric circuits, can cause a phenomenon known as Electromagnetic Interference (EMI) which can induce unwanted voltages and affect the performance of electronic devices. The area of engineering which aims to eradicate the problems caused by these disturbances is known as Electromagnetic Compatibility (EMC). (6)(7) Two equations which form the fundamental basis for electromagnetism and its understanding are Amperes Circuital Law and Faradays Law. Amperes Law states that the magnetic field, B, caused by an electric current is proportional to the size of the electric current. (8) (equation 1) However, in this experiment, the current, I, flowing through the circuit remains constant, as does the permeability of free space, , and 2à Ã¢â€š ¬, and therefore the magnetic field, B, is expected to be inversely proportional to the distance from the wire. Faradays Law states that any change in the magnetic environment of a wire will cause a voltage to be induced in the wire. (9) (equation 2) If = BA and a sinusoidal variation of the magnetic field is assumed: (equation 3) where is the induced voltage, N is the turns on the coil, A is the area of the coil and is the angular frequency. As N, A and are constant, the magnetic field, B, should be directly proportional to the induced voltage, E, in this investigation. 2.1 Introduction to Method 2.1.1 Apparatus Agilent signal generator to vary the frequency of the signal provided to the circuit. Twin wire board as shown in figures 1 and 2, containing a fixed wire, an adjustable return connection wire and a 50ÃŽÂ © resistor in series with the circuit. Rectangular air cored coil of dimensions 30mm x 30mm and containing 50 turns, used to measure the changing B field from the wire. Ferrite core to alter the effects of the B field on the coil. Digital Multimeter to record the voltages across the resistor and the search coil, measuring with an uncertainty of +0.0005mV. 2.1.2 Procedure The long wire board was connected to the Agilent signal generator, ensuring that the 50ÃŽÂ © resistor was in series with the circuit. One connection was made using the fixed wire on the board; the other was made using a long connection lead kept the farthest distance away from the experiment as possible, as demonstrated in figure 1. A sign wave signal of frequency 60kHz was selected and the voltage across the resistor recorded, allowing a current to be calculated. The rectangular search coil was then placed against the fixed wire 2cm away from the centre line and the voltage across the coil measured. The coil was then moved at a right angle away from the fixed wire in increments of 1cm and the voltage across the coil measured at each of these points. The input sign wave frequency was then altered to 30kHz and the experimental procedure was repeated. The input sign wave frequency was then returned to 60Hz and a round ferrite core inserted into the search coil; the experiment was th en repeated again. The long connection lead was then changed to provide a short connection as shown in figure 2. A sign wave signal of frequency 60kHz was again selected and the current calculated. The rectangular search coil was then placed against the short connection wire 2cm away from the centre line and the voltage across the coil measured. The coil was then moved in the same manner as above and the voltages recorded. The input sign wave frequency was again altered to 30kHz and the experiment was repeated. The current through the circuit was calculated using Ohms law: where V is the measured voltage across the resistor (3.385 V) and R is the known resistor value 50ÃŽÂ ©, giving = 191mA. For the single wire and double wire at both frequencies, and the single wire at 60kHz with the ferrite core, the distance of the search coil away from the wire, d, and the RMS voltage across the search coil, E, were recorded and collected in three tables which can be found in Appendix A. The RMS voltages measured were then converted into peak-to-peak voltage values for use in equation 3. The resultant experimental B fields for the respective frequencies were then calculated using equation 3, using N = 50 and A = 9x and included in the tables. 3.1 Single Wire Experiment For the single wire experiment, theoretical values for the magnetic flux density at each distance were then calculated using equation 1. A graph of B against the distance from the wire was then plotted for both frequencies and a comparison between experimental and theoretical values made on both graphs. 3.2 Single wire experiment with Ferrite Core With the ferrite core introduced into the search coil, at a frequency of 60kHz, the voltage across the search coil was measured and a graph of the induced EMF, V, against distance plotted. The induced EMF without the ferrite core is also plotted for reference. 3.3 Double Wire Experiment For the double wire experiment, two theoretical values for the magnetic flux density were calculated; one for the magnetic flux induced by the fixed wire and one for the magnetic flux induced by the short connection wire. These were both calculated using equation 1, using a reference of +0cm for the short connection and +15cm for the fixed wire. These values were then combined using the principle of superposition and an overall theoretical value for magnetic flux density at each distance calculated. Again, a graph of B against the distance from the wire was plotted for both frequencies and a comparison between experimental and theoretical values made on both graphs. It was expected that as the distance of the search coil away from the fixed wire increased, the voltage induced across the coil would decrease and therefore the magnetic flux density, B, would also decrease. A comparison of the experimental and theoretical data points from figures 3 and 4 shows a clear correlation between the two calculations, confirming the theory discussed in section 2 of the report. The slight discrepancies between the experimental and theoretical values can be accredited to possible electromagnetic interference (EMI) from the long connection lead, inducing unwanted voltages across the coil and affecting the accuracy of the results. The scale of magnetic flux is affected by the angle at which the flux density and the surface interact such that , where ÃŽÂ ¸ is angle between the magnetic flux, B, and the normal to the surface. When the normal to the coil is parallel to the wire, ÃŽÂ ¸ = 90 ° and therefore cos(ÃŽÂ ¸) = 0, proposing that the theoretical value of magnetic flux is 0. When the coil was placed perpendicular to the fixed wire, a voltage of 0.541mV was measured, which can be approximated to 0V. The small induced voltage can be considered due to the presence of a background magnetic field. With the ferrite introduced into the search coil, the emf induced in the coil is measured to be significantly larger than with no ferrite present, as can be seen from figure 5. Due to the high magnetic permeability of a compound such as a ferrite, the magnetic field produced by the coil is concentrated in the core material, reducing the effects of EMI and increasing the induced emf in the coil. (10) In the double wire experiment, the voltage induced in the search coil is created through a combination of the magnetic fields produced from both the fixed wire and the short wire. Because it is a series circuit, the current is flowing in opposite directions in each of the wires and consequently, from the right-hand rule, the magnetic fields from each wire are also acting in opposite directions, demonstrated in figure 8. Therefore, it would be expected that the induced voltage across the coil, and subsequently the magnetic flux, B, would be smaller than those measured in the single wire experiment and this is confirmed through the values shown in Appendix A. As the coil is moved away from the wires, the magnetic field weakens but at a decreased rate as the distance increases; therefore, we would expect a graph displaying a reciprocal nature, achieved in figures 3 and 4. To conclude, the experiment outlined in this report was successful in demonstrating the effects of magnetic fields produced by long wires and the effects of ferrite on the emf induced in a coil, successfully validating the theory from section 2 that the magnitude of the magnetic flux field, B, is proportional to the reciprocal of the distance of the coil from the wire. However, the consistently higher experimental values compared to the theoretical values clearly demonstrates the possible disturbances arising from the interaction between two different magnetic fields and highlights the need to minimise these to achieve accurate results. Through the introduction of a ferrite core, this experiment was successful in demonstrating a simple method for this. The findings from this experiment are statistically insignificant due to the nature of the apparatus used and the various possible sources of error, both systematic, because of EMI, and human, arising from the low level of accuracy when measuring distances and ensuring the coil remains parallel to the wire. However, the experiment was useful in showing the basic relationship between distance and the strength of magnetic flux, as well as highlighting the importance of finding solutions to reduce the effects of EMI on induced voltages and introducing a simple method for realizing this. [1] Encyclopaedia Britannica, Magnetic Field, Encyclopaedia Brittanica, [Online]. Available: https://www.britannica.com/science/magnetic-field. [Accessed 19 October 2016]. [2] M. Rouse, Electromagnetic Field, March 2010. [Online]. Available: http://whatis.techtarget.com/definition/electromagnetic-field. [Accessed 20 October 2016]. [3] Institute of Physics, Magnetic Resonance Imaging, 2012. [Online]. Available: www.iop.org/education/teacher/resources/teaching-medical-physics/magnetic/file_56290.pdf. [Accessed 20 October 2016]. [4] K. Bonsor, Maglev Train, 13 October 2000. [Online]. Available: http://science.howstuffworks.com/transport/engines-equipment/maglev-train.htm. [Accessed 19 October 2016]. [5] M. Williams, Use of Electromagnets, 13 January 2016. [Online]. Available: http://www.universetoday.com/39295/uses-of-electromagnets/. [Accessed 21 October 2016]. [6] Andi, What is electromagnetic interference and how does it affect us?, [Online]. Available: https://www.westfloridacomponents.com/blog/what-is-electromagnetic-interference-emi-and-how-does-it-affect-us/. [Accessed 21 October 2016]. [7] M. Soleimani, Faradays Law, University of Bath, 2016. [8] D. Wood, Amperes Law: Definiton Examples, [Online]. Available: http://study.com/academy/lesson/amperes-law-definition-examples.html. [Accessed 22 October 2016]. [9] Hyper Physics, Faradays Law, [Online]. Available: http://webcache.googleusercontent.com/search?q=cache:85jQ17DaK1wJ:hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html+cd=2hl=enct=clnkgl=uk. [Accessed 21 October 2016]. [10] Wikipedia, Magnetic Core, [Online]. Available: https://en.wikipedia.org/wiki/Magnetic_core. [Accessed 23 October 2016]. Single Wire Single Wire with Ferrite Core Double Wire

Existentialism in Franz Kafkas The Metamorphosis Essay -- Metamorpho

Franz Kafka's The Metamorphosis is a masterfully written short story about Gregor Samsa, a man who devotes his life to his family and work, for nothing in return.   Only when he is transformed into a helpless beetle does he begin to develop a self-identity and understanding of the relationships around him.   The underlying theme of The Metamorphosis is an existential view that says any given choice will govern the later course of a person's life, and that the person has ultimate will over making choices.   In this case, Gregor?s lack of identity has caused him to be numb to everything around him.      Ã‚  Ã‚   One morning, Gregor awakens to find himself with the body of a beetle.   Although it never explains how Gregor morphed into a beetle, or shows that Gregor gives much thought to having the body of an insect, Kafka gives the strong impression that Gregor is extremely devoted to his work and is the sole support for his family, none of whom work themselves.   Gregor devoted himself to a life of work and self sacrifice, following ...

Home Food VS Fast Food Essay

Homemade food is often treated as a privilege. Low cost of fast food and its nutrition value become a solution for many families who have neither time not money to cook at home. Warnings that fast food is not healthy do not stop Americans who treat it as an essential part of their daily diet. As a result, the prevalence of obese and overweight people plummets. If we look at what is behind attractive pricing strategies and delicious tastes offered at fast food chains, all facts support the idea that homemade food is a better choice. The articles _Is Junk Food Really Cheaper?_ by Mark Bittman and _Fast Food Versus Slow Food_ by Nancy Folbre provide enough facts to motivate people to cook at home. Out of these two articles, Folbre’s specific approach to argumentation makes her writing extremely persuasive and logical advocating cooking at home. One of the biggest advantages of fast food is that it is really fast. People do not spend much time ordering their food and eating it on the go. People tend to work more and cook less than they used to 50 years ago (Folbre). Technological development simplify people’s attitude to food and cooking; all they need is to heat their meals in the microwave oven. Moreover, accessibility of fast food restaurants is becoming better and better. Contrary to this, cooking at home seems less attractive due to the routine related to this process. Grocery shopping, cooking, cleaning up, and developing cooking skills are required. Because time is the most expensive thing in the world, not all people are ready to spend it on cooking. Many  Americans treat cooking as a job and they are confused that they are not paid for it. Complaints of many Americans about lack of time for cooking are common; however, the popularity of food shows is on the peak (Folbre). Instead of cooking, people prefer t o watch how others cook. According to Bittman, there are five fast food restaurants per each supermarket in the United States. If people eat at fast food restaurants, they forget about such chores as cooking and cleaning up and have more time to relax after work. Overall, it is difficult to argue that fast food restaurants are not convenient. In fact, they are life-saving for many people who work long hours and have no time to care about what they eat. Bittman states that average American family watches TV 1.5 hours a day; it means that they have enough free time. They lack motivation to cook and use ‘affordability’ argument to convince others that their behavior is right. A strong belief that cooking at home is expensive stops people from researching the issue in detail. Many of them even do not try to cook at home before they complain that it requires much money. Folbre uses a strong and persuasive argument to prove that home food is not as expensive as people think about it. She finds that people need 30 minutes to cook a burger at home. This time includes time spent on shopping, washing up, cooking, and serving. While an average burger costs around $4, the cost of ingredients for a burger is $1. Folbre states that 30 minutes spent on cooking can be easily compared to driving to a fast food restaurant or standing in line to buy a burger. Homemade burgers become even more affordable is they are cooked for the family because it still takes a bit more than 30 minutes and four burgers are ready as a result. Folbre’s experiment proves that people can afford to eat at home and it can be economical for their budget. However, time spent on cooking is the reason why many people prefer to eat out. Additionally, fast food is expensive according to both Bittman and Folbre, purely organic food is also very expensive because it requires special care and conditions to be produced. At the same time, fast food and organic food are two extremes; there are many other food products which are not too  expensive and healthy. Bittman challenges ‘affordability’ argument providing a list of alternatives which are budget-friendly. Rice with a simple salad costs less than McDonald’s dinner. It does not require developed cooking skills and much time to be ready. There are many TV-shows, YouTube channels and cook books which offer a number of different recipes for all life occasions. Cooking can be fun if people stop perceiving it as a chore. Bittman tries to catch the issue as a whole; as a result, his article complexly argues for home food benefits. Nutrition value of fast food is high; poor people believe that they need calories and eagerly consume fries and soda drinks. According to Bittman, Americans consume more calories they need a day; as a result, it leads to health issue related to weight gain. Fast food is addictive; even when people are full, they feel hungry after a while. There are special chemicals and flavors added to fast food to intensify its taste and make it desired for people. Ordinary home food contains less fat and sugar which makes it more useful for people. People who cook at home always know what ingredients they use to cook their meal which allows them making healthier choices. Also, it is very diverse and all people can find something simple to cook but delicious. In summary, both writers agree that people who experience lack of time and money often eat at fast food restaurants because they believe that it is cheaper than cooking at home. Some of them complain that they do not have time to cook daily. People always have time but set different priorities; some of them prefer to watch TV in the evening and it is their choice. While Bittman tries to persuade people making his argument global, Folbre focuses on the economic side of the issue and creates a solid line of argumentation. I like this specific approach to persuasion more than generalizations sprinkled by random statistics in Bittman’s article. Folbre successfully proves her point of view with the help of her experiment; she rationally counts money and time spent of home cooking to show that it can be economical and fast. Her research persuades me that cooking can be economical showing real examples in life situations. Bittman only lists alternatives while Folbre uses them and checks their relevance. Moreover, it  can be healthier, more nutritious and delicious. Home food contains less sugar and fat while fat is the main source of calories in fast food. People need to try and decide what is better for their health, schedule, and purse. Works Cited Bittman, Mark â€Å"Is Junk Food Really Cheaper†Ã¢â‚¬  Everything’s an Argument with Readings. Ed. Andrea A. Lunsford, John J. Ruszkiewicz, and Keith Walters. 6th ed. Boston: Bedford/St. Martin’s, 2013. 660-665. Print. Folbre, Nancy. â€Å"Fast Food Versus Slow Food†. _The_ _New York Times._ July 29, 2013. Web. July 24, 2014.

Nature and Main Areas of Financial Management Essay

Introduction: Financial management is basically makes plans, organize, direct and control the financial activities in an organization. Applying general management principle to financial resources of the organization is part of financial management activity. Financial management is concern with the efficient and effective management of the financial resources of the organization. Nature and Main areas of financial management: Financial management is broadly concerned with the mobilization and development of funds by a business organization. To run the operations of company efficiently, it is important to raise and handle the funds effectively. Financial management performs this job. Financial management works on the following areas: 1.Finding financial necessities: – A financial manager must know financial necessities of the company. He should find out financial needs of the company. Financial manager must focus on available funds which are needed to meet promotional expenses, fixed and working capital needs. The necessity of non-current assets is related to types of company. Working capital needs mainly depends on the range of business operation. If the range or scale of business operation is large then the requirement of working capital will be high. If the financial manager makes wrong assessment about financial necessities, it may cause huge damage to the company. 2.Selecting the sources of funds:- Financial management works on how to raise funds from various sources for the company. Various sources may be available for raising funds. To issue of share capital and debentures proper steps should be taken. Financial management should ask various financial institutions to provide long-term funds. Equity capital necessities may be met by getting cash credit or overdraft facilities from commercial banks. A financial manager should be very cautious in approaching different sources to raise funds. Financial management should analyze the sources before raising funds. 3.Managing working capital:- Working capital indicates to that part of company’s capital which is needed for financing short-term or current assets such as cash, receivables and inventories. Maintaining these assets to a proper level is very essential for the organization. Finance manager is required to determine the amount of such assets. 4.Financial analysis and interpretation:- One of the most important tasks of financial management is analyzing & interpretation of financial statements. Financial management expected to focus on the short term and long-term financial position of the company. Profitability, liquidity position of the company should also be monitored by financial management. Financial manager can do this by calculating a number of ratios. Making interpretation of various ratios is also essential to draw certain outcome. Financial analysis and interpretation has become an important area of financial management in modern days. 5.Cost-volume profit analysis:- Cost volume profit is also popularly known as CVP relationship. Cost volume profit analysis is a very important area of financial management. Fixed costs, variable and semi variable cost analysis is crucial for CVP or Cost-volume profit calculation. Fixed costs are more or less constant for varying sales volumes. Variable costs depend on the sales volume. Semi-variable costs can be fixed or variable in the short-term. The financial manager has to make sure that the income of the firm will cover its variable costs, for there is no meaning in being in business, if the expected amount of income is not accomplished. A company must have to earn a sufficient income to cover its fixed costs as well. Finding the break-even point is one of the major responsibilities of financial management. 6.Dividend policy:- Dividend is provided by company to the shareholders for making investment in the shares of the company. The investors mainly interested in earning the maximum return on their investments. On the other hand management wants to retain the profits for making reinvestment in future projects and opportunities. These contradictory purposes will have to be adjusted in the interests of investors and the company. The interest of shareholders and the necessities of the company are related with the dividend policy, so that’s why dividend policy is an important area of financial management. 7.Capital budgeting:- To make investment decision in capital expenditure the concept of Capital budgeting is essential. Capital expenditure is an expense the benefits of which are expected to be achieved over a period of time exceeding one year. Capital expenditure is for acquiring or improving the fixed assets. The benefits from capital expenditure are expected to be received over a number of years in future. Capital budgeting decisions are very important for any organization. Any bad or unplanned investment decision may become harmful for the company. Capital budgeting is a very important area of financial management.