Statement of Purpose Essay Example for Free

Statement of Purpose Essay I am determined to become a top engineer and researcher in radiology, advancing the development and application of this important technology. This is an era when information technologies, such as electronics and computer science, are mushrooming throughout the world. But how about radiological science? Is it a diminishing subject without a future? Of course not! It is a research area that has a unique and indispensable position in many fields such as industry and medical science. In my point of view, radiological science can be classified as a branch of information technology. Why? Combined with computer science and electronics, radiology provides us with information that was originally thought to be invisible such as the interior structure of metal, the image of the inside of the human body and even the existence of a celestial body far away from us. With the capacity of acquiring many kinds of important information, radiology is undoubtedly a promising research field. My initial interest in radiological science was sparked by a visit to the laboratory of the Large Container Inspection System (LCIS) when I was a freshman of Tsinghua University. LCIS, specially designed for Customs, was one of the key national projects taken charge by the Department of Engineering Physics. As a fruit of radiological science, it can present the image of the interior of a large container without even opening it. The seemingly magical power was really attractive to me, a young man with a keen curiosity and the ambition to fulfill accomplishments in engineering and applied technology. In the spring of 1999, I entered the (name) Laboratory and began to assist the professor in research. The assistants job offered me a great opportunity to work with and learn from the professors and graduates in the lab, who had not only taught me a lot of knowledge in radiology, but also impressed me with their enthusiasm and devotion to this field. To be competent in the job, often went to the library to read books and science journals on radiology, such as the Nuclear Instruments and Methods and IEEE Nuclear Science ; Medical Imaging. This reading, though a little bit difficult, brought to me valuable information of the state-of-the-art technology. With my broadening mind and growing interest, I am determined to become a top engineer and researcher in radiology, advancing the development and application of this important technology. While reading the journals, I discovered that the US is the best place to pursue my further study and research because of its favorable atmosphere of research in radiology. And the University of (name), one leader in nuclear engineering, has the graduate program that I most want to be associated with. From web sites and publications introducing the (university name), I learned that you are conducting a wide range of research in radiology, much of which I am interested in, such as radiation instrument design and radiation imaging. With the world-class faculty, advanced facility, nurturing and challenging environment, your graduate school is the best place where I can extend myself with the most advanced technologies. I know that the admission to your school is very competitive and challenging. But I am confident that I am qualified and well prepared for it. The undergraduate study in Tsinghua has built for me a solid academic foundation in mathematics and physics as well as in my major. Intelligent and diligent, I received outstanding records in the courses Ive taken and my overall GPA is in the top 5% of our department, for which I have been granted scholarships for 4 consecutive years. My research ability is also outstanding. In my college years, I took advantage of every opportunity to enhance my research ability and enrich my research experience in my major. I carefully and creatively planned and conducted the experiments in all the lab courses, such as Lab of Physics and Lab of Modern Physics. In the course of Modern Physical Electronics, I, with one of my classmates, designed an experiment to test the transmission feature of electrical cable used in the oil well nuclear logging system, and proposed some advice to make improvements. I also took part in the SRT (student research training) program, doing lab work on the application of virtual instrument in radiation detection and nuclear instrumentation. In the lab, I am appreciated by my advisor, Professor (name) for I am not only able to conduct research independently, but also understand how to cooperate with others. As a college student, I am well developed in many aspects. As the monitor of the class, I showed responsibility and leadership in my work. For my excellence in English ability (please refer to the Resume), I was selected as the editor of the University English TV Station and the broadcaster of the University English Radio Station. I love sports and take part in many fields of it: I am the captain of the basketball team of the class, the fourth place winner in the University Badminton Tournament and a good I-go player. In the annual Comprehensive Quality Assessment taken by the university to scale the students all around ability, I am always the top student of my class. I can not forget the days when I was in primary school, short and weak, always failing in the sports matches. With my enthusiasm in sports and the determination to become strong, I started to exercise. Each time when I was exhausted from running, out of breath and my legs aching, it was my perseverance that had kept me on the track. With my efforts paying off, my conviction became firmer: determination and perseverance is crucial in peoples success. With my perseverance and strong interest, as well as the academic background and the research ability, I am confident that I am a suitable candidate for your graduate program. My intended field of study is radiation measurement and imaging, medical physics and other related areas in radiology science. If I could be admitted and financially aided, I would like to pursue my PhD degree there. And after that, I will come back to China, to enter industry or research institutes to promote the research and application of radiological science

herody The Imperfect Hero of Homers Odyssey Essay -- Odyssey essays

The Imperfect Hero of The Odyssey   Ã‚  Ã‚  Ã‚   In literature, a bold character or hero is often the principle character. In the epic poem The Odyssey there are many immortals, but only one hero, Odysseus. The differences between the immortals and the hero are few. The god-like Odysseus is plagued with the human weaknesses of pettiness, self-doubt, and dependence on the pity of others. Odysseus reveals his pettiness when he amuses himself with humorous guile. Odysseus not only uses his cunning at the expense of his enemies, but he also uses his cunning and guile as a way of entertaining himself. After Odysseus tells the Cyclops his name is "Noman," Odysseus stabs Polyphemus in the eye and Polyphemus cries for help saying, "Friends, Noman is murdering me be craft" (87). Odysseus’ power over his enemy is once again confirmed by his wit more than by his physical force. Although Odysseus is a wise man, this wit is only useful in the short picture. After he and his men get away from Polyphemus, Polyphemus’ father, Poseidon, causes the mortal men trouble. To avoid such trouble, Odysseus could have choose not to amuse himself. Odysseus often loses sight of the greater vision, which is returning to his family. Odysseus risks his return by a moment of testosterone-driven pettiness. The moment comes when Odysseus challenges Irus by saying, "†¦do not challenge me too far with show of fists, or you may rouse my rage; and old as I am, I still might stain your beast and lips with blood" (174). When the beggar/Odysseus fights and wins against Irus it is a miracle that no one became suspicious of Odysseus. The suitors were shocked that an old beggar, as Odysseus appeared to be, would be that strong. If anyone put two and two together then Od... ...One thing that can be learned from Odysseus is: no matter how good one is, one is still a human; and part of being a human is to learn to overcome one’s flaws Works Cited and Consulted Griffin, Jasper, Homer: The Odyssey   Cambridge UP 1987 Heubeck, Alfred, J.B. Hainsworth, et al. A commentary on Homer's Odyssey. 3 Vols. Oxford PA4167 .H4813 1988 Jones, Peter V. Homer's Odyssey : a companion to the translation   of Richmond Lattimore.   Ã‚  Ã‚  Ã‚   Carbondale, IL : Southern Illinois University Press, c1988. PA4167 .J66 1988 Murnaghan, Sheila,   Disguise and Recognition in the Odyssey, Princeton UP 1987 Peradotto, John , Man in the Middle Voice: Name and Narration in the Odyssey, Princeton UP 1990 Stanford, William Bedell. Homer's Odyssey. 2 Vols. Macmillan   Ã‚  Ã‚  Ã‚   Thalmann, William G., The Odyssey : an epic of return. New York : Twayne Publishers. PA4167 .T45 1992

Flow over Weir

Introduction A weir is an opening in the sidewall of a tank at top. The stream of liquid coming out the weir is known as a nappe, sheet or vein. There is no difference between a notch and weir except that the former is a small structure and has sharp edges. A weir generally an overflow structure, with a broad crest, build across an open channel. The terms air and weirs are used synonymously in general. The top of weir wall over which the liquid flows is known as the sill or crest. The head under which the weir is discharging is measure from the crest to the free surface.A weir or notch is generally used for measuring the flow of liquids. In this experiment, we ar using the rectangular weir and triangle weir. Rectangular weir and triangular weir (v-notch) ore often used in water supply, wastewater and sewage system. They consists of a sharp edge plane with rectangular and triangular profile for the water flow. Broad-crested weirs can be observed in dam spillways where the broad edge i s beneath the water surface across the entire stream. Flow measurement installations ith broad-crested weirs will meet accuracy requirement only if they are calibrated. objective To determine the characteristics of open channel flow over; * A rectangular notch * A triangular (v-notch) * To determine values of the discharge coefficient for both notches Method General features of the flow can be determined by direct observation. Discharge coefficient values can be determined from measurements of the height of the free surface of water above the notch base and corresponding volume flow rate Equipment In order to complete the experiment, we need a number of pieces of equipment * The F1-10 haudralics bench which allows us to measure flow by timed volume collection * The F1-13 stilling baffle The F1-13 rectangular and Vee notch * Vernier Height Gauge (supplied with F1-13) * Stopwatch * Spiril level 4 4 2 2 5 5 8 8 7 7 6 6 3 3 1 1 Figure 1: Flow over Weirs – Figure 2: Flow over Weir s – vee notch weir rectangular notch weir 1 1 5 5 2 2 6 6 Hydraulics BenchBasket of glass spheres 3 3 Weir channelVolumetric measuring tank 4 4 (V) Vee notch weir7 7 Rectangular weir Hook & point gauge Hook Gauge and Scale8 8 There are different shapes of weirs that can be used to measure the volumetric flow rate. These shapes with their dimension are shown in fig 3 below. Figure 3: Details of weirsTechnical Data The following dimension from the equipment are used in the appropriate calculation. If required these values may be checked as part of the experimental procedure and replace with your own measurements. * Width of rectangular notch, b= 0. 030 * Angle of vee notch, o=90 degree Theory Because the depth of flow above the base of notch is related to the volume flow rate through it, the notch forms a useful flow measurement device. The classical result for flow over notch are obtained by an application of the Bernoulli equation, from a point well up stream to a point just above the notch.This approach requires a number of very substantial assumptions and it yields the following results: For Rectangular Notch, the formula is given by; Qt=Cd23b(2g)H32 For Vee-notch, the formula is given by; Qt=Cd815tan(? 2)(2g)H52 Where; Qt= Volume flow rate H = height above notch base B = width of rectangular notch ? = angle of the vee in triangular notch; Cd= the discharge coefficient, which has to be determined by experiment These can be rearrange to give; Cd=3Qt2b2gH32 For rectangular notch Cd=15Qt8tan? 22gH52 Foe vee notch. Discussion.From the experiment, we are about to determine the discharge coefficient of the both rectangular and the triangular notches. The discharge coefficient for the rectangular notch are influence by its H and also its volumetric flow rate while the triangular notch are influence by its o, H and also its volumetric flow rate. From the result, we can see that the volumetric flow rate of both notches are increase. This showed show that the w ater outflow increase as the H increased. These is suppose to happened as, the water level increase, the Water outflow from the notch increase over the time.But from discharged coefficient, we can see that the value of both notches are not stable. This may be from the friction at the head of the notches during the starter of experiment. The friction will affect the time taken to collect 1liter of water for V-notch and 5 litre of water for the Rectangle notch. Thus it will effect the volumetric flow rate and also the discharge coefficient as the volumetric flow rate influence the value of Cd. The aim of this experiment is to determine the value of the discharge coefficient for both notches of rectangular notch and also triangular (V-notch).The discharge coefficient values can be determine from the measurements of the height of free surface of water above the notch base and corresponding volume flow rate For discharge coefficient of Rectangular Notch, the formula is given by; Cd=3Qt2b 2gH32 For discharge coefficient of V-notch, the formula is given by; Cd=15Qt8tan? 22gH52 In comparison, for rectangular notch, the theoretical value of its discharge coefficient, Cd, is ——. However, the experimental value of Cd turns out to be 2. 31. Based on experiment that we conducted, the percentage error for rectangular notch is–.This is due to some errors that ccur during experiment. For example parallax error. However, for V-notch, the theoretical value is —, but theoretical value is—. There is not much of a difference between its theoretical value and actual value. This mean that the flow is laminar, and not much energy is loss through friction. The derivation of values are contributed by the error during handing the experiment, if we take it as overall error, most of error occurred when step of taking the height started. First, we have to careful about the height of datum. For convenience, is is advice that to take your first datum as zero .Other than that, it is also advice that th time should be taken 3 times so that we can take the average so that the error can be minimize. Besides, The theory does not put energy loss or viscosity of the water flow into consideration, but it only depends on the flow rate, the width of the notches and height of the notches. However, in reality, water currents or flow rate may not be constant all the time and it is difficult to maintain the water level height above the notches as what he want. The cross section area over the weir with flowing water at lower rates is small compare to high rates.This is because at lower flow rates, the time for collection of water varies a lot compare to higher flow rates. It require a longer time to collect a specific amount of water to measure the flow rate at lower flow rate due to viscosity of water. Moreover, energy is conserved due to slower speed of flow of water. At higher flow rates, water flowing may already have the energy to create a consta nt water flow. Whereas at an even higher rat, water flow is difficult to control in order for it to be in constant height above notch base because the water current is too high.

The State Of Democracy Around The World - 1721 Words

For the first time in known history, most people around the world are living under democratic ruling. Although to many this can be seen as a positive step forward from the gruelling nature of dictatorship and other forms of governance, one needs to understand the true nature of the worlds democratic state. This report will investigate and analyse the state of democracy around the various countries of the world and elaborate on the chosen countries democratic crisis and state of governance. Originating from the Greek terms demos, meaning ‘people’ and kratos, meaning ‘rule,’ democracy essentially means to ‘rule by the people’ (Hague and Harrop, 2013, p. 43). One could argue however, that democracy is considerably more than just a form of governance. For any nation to be considered democratic it must hold free and fair multi-party elections, must be free of any corruption and promote accountability and transparency. Citizens living under a democratic ruling should be guaranteed civil liberties, including, freedom of the press, the right to association, and the right to a fair and just trial (Hague and Harrop, 2013). Most countries around the world claim themselves to be ruling under a democracy, however the degree to which they are democratic varies drastically (Shah, 2012). Many countries, which claim to be democratic, are suffering from poor representations, election anomalies and corruption. A famous quote taken from Sir Winston Churchill, a former Prime Minister of theShow MoreRelatedDemocracy Is Defined As A System Of Governance897 Words   |  4 PagesDemocracy can be defined as a system of governance where there is a political system in which governments are chosen through free and fair elections, there is an active participation in political process by the citizenry, laws and procedures apply equally to all citizenry. 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