Leonardo Da Vinci 2000-07-02 Essays - Giftedness,

Leonardo Da Vinci 2000-07-02 Leonardo Da Vinci is one of the greatest and most ingenious men that history has produced. His contributions in the areas of art, science, and humanity are still among the most important that a single man has put forth, definitely making his a life worth knowing. Da Vinci, born on April 15, 1452, is credited with being a master painter, sculptor, architect, musician, engineer, and scientist. He was born an illegitimate child to Catherina, a peasant girl. His father was Ser Piero da Vinci, a public notary for the city of Florence, Italy. For the first four years of his life he lived with his mother in the small village of Vinci, directly outside of the great center of the Renaissance, Florence. Catherina was a poor woman, with possible artistic talent, the genetic basis of Leonardo's talents. Upon the realization of Leonardo's potential, his father took the boy to live with him and his wife in Florence (Why did). This was the start of the boy's education and his quest for knowledge. Leonardo was recognized by many to be a Renaissance child because of his many talents. As a boy, Leonardo was described as being handsome, strong, and agile. He had keen powers of observation, an imagination, and the ability to detach himself from the world around him. At an early age Leonardo became interested in subjects such as botany, geology, animals (specifically birds), the motion of water, and shadows (About Leonardo). At the age of 17, in about 1469, Leonardo was apprenticed as a garzone (studio boy) to Andrea del Verrocchio, the leading Florentine painter and sculptor of his day. In Verrocchio's workshop Leonardo was introduced to many techniques, from the painting of altarpieces and panel pictures to the creation of large sculptural projects in marble and bronze. In 1472 he was accepted in the painter's guild of Florence, and worked there for about six years. While there, Leonardo often painted portions of Verrocchio's paintings for him, such as the background and the kneeling angel on the left in the Baptism of Christ (Encarta). Leonardo's sections of the painting have soft shadings, with shadows concealing the edges. These areas are distinguished easily against the sharply defined figures and objects of Verrocchio, that reflect the style called Early Renaissance. Leonardo's more graceful approach marked the beginning of the High Renaissance. However, this style did not become more popular in Italy for another 25 year (Gilbert 46). Leonardo actually started the popularization of this style. For this reason Leonardo could be called the Father of the High Renaissance. Leonardo's leading skills emerged through his paintings and his techniques. Leonardo's talents soon drew him away from the Guild and in 1472 Leonardo finished his first complete painting, Annunciation. In 1478 Leonardo reached the title of an Independent Master. His first large painting, The Adoration of the Magi (begun in 1481), which was left unfinished, was ordered in 1481 for the Monastery of San Donato a Scopeto, Florence. Other works ascribed to his youth are the Benois Madonna (1478), the portrait Ginevra de' Benci (1474), and the unfinished Saint Jerome (1481). Leonardo expanded his skills to other branches of interest and in 1481 Leonardo wrote an astonishing letter to the Duke of Milan, Ludovico Sforza. In this letter he stated that he knew how to build portable bridges; that he knew the techniques of constructing bombardments and of making cannons; that he could build ships as well as armored vehicles, catapults, and other war machines; and that he could execute sculpture in marble, bronze, and clay. Thus, he entered the service of the Duke in 1482, working on Ludovico's castle, organizing festivals, and he became recognized as an expert in military engineering and arms. Under the Duke, Leonardo served many positions. He served as principal engineer in the Duke's numerous military enterprises and was active as an architect (Encarta). As a military engineer Leonardo designed artillery and planned the diversion of rivers. He also improved many inventions that were already in use such as the rope ladder. Leonardo also drew pictures of an armored tank hundreds of years ahead of its time. His concept failed because the tank was too heavy to be mobile and the hand cranks he designed were not strong enough to support such a vehicle. As a civil engineer, he designed revolving stages for pageants. As a sculptor he planned a huge monument of the Duke's father mounted up on a

Quotation Marks and Apostrophe S

Quotation Marks and Apostrophe S Quotation Marks and Apostrophe S Quotation Marks and Apostrophe S By Maeve Maddox Aika asks: how do I properly sequence s and punctuation marks? As I can’t think of any example of beginning a quotation with a disembodied ‘s, I’ll offer this guideline from the Chicago Manual of Style: . . . A term enclosed in quotation marks . . . should never be made into a possessive. 7.30 For example, you can write the Atlantic Monthly’s editor or Gone With the Wind’s admirers because the titles taking the possessive are italicized. You may not, however, do the same thing with the title of a short work such as â€Å"Ode on a Grecian Urn.† Titles of short works are enclosed in quotation marks. You would have to rearrange your phrasing so as not to have: â€Å"Ode on a Grecian Urn†Ã¢â‚¬â„¢s admirers. You’d rephrase it as admirers of â€Å"Ode on a Grecian Urn.† Here is a related entrance on Chicago: Q. When indicating possession of a word that ends in s, is it correct to repeat the s after using an apostrophe? For example, which is correct: â€Å"Dickens’ novel† or â€Å"Dickens’s novel†? A. Either is correct, though we prefer the latter. Please consult 7.15–18 for a full discussion of the rules for forming the possessive of proper nouns. For a discussion of the alternative practice of simply adding an apostrophe to form the possessive of proper nouns ending in s, see paragraph 7.21. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Punctuation category, check our popular posts, or choose a related post below:Creative Writing 10110 Techniques for More Precise WritingContinue and "Continue on"

How Did Europeans Profit from the Opium Trade in China Essay

How Did Europeans Profit from the Opium Trade in China - Essay Example Still, Europeans were not allowed to import opium directly into China. As a means of circumventing these trade restrictions and gaining profit, the British had to devise elaborate means of importing opium. In these regards, Europeans would be tea in Canton and use opium that would be smuggled in on British ships to pay for the opium (Fairbank). The high value tea had in Europe resulted in opium functioning as a useful means of gaining profit. In the early 19th century the Chinese ban of trading this commodity was lifted (Waley). Still, a number of years later further restrictions would be placed on this commodity exchange. During this period the then current Chinese dynasty had undergone a shift towards Confucianism, resulting in the restriction of European import of opium (Waley). These restrictions would result in threats to European profits on opium trade in China. As a means of continuing to profit on opium, the British would ultimately involve themselves in the First and Second Opium Wars with China. These wars would result in the opening of British trade of opium into China. 2. How did nationalism serve the needs of statesmen and bureaucrats rather than those of the general population, especially as more people were allowed to vote and hold public office? To a large degree, nationalism served the needs of statesmen and bureaucrats rather than the general population. Nationalism emerged during the early 19th century as statesmen in France sought means of uniting a populace in revolution (Leoussi). During the French Revolution nationalism these statesmen were able to implement nationalistic impulses as a means of inciting riots and elevating their political power (Hobsbawm). With the subsequent shifts in government these individuals assumed control under these nationalistic tendencies, ultimately using this political strategy as much for personal gain as public interest (Hobsbawm). The American Revolution was even clearer in its implementation of nationalis m as a means of advancing the interests of statesmen (Leoussi). In these regards, businessmen and bureaucrats with significant that faced significant economic or political gain in establishing independence from Great Britain implemented nationalism as a means of uniting the populace (Hobsbawm). This period of American history had seen a great amount of public debate over independence with loyalists and patriots debating the opposing positions (Leoussi). In this climate, individuals such as Thomas Paine through his ‘Common Sense’ pamphlets were able to incite the public through nationalistic tendencies as a means of gaining increased public attention or political power. With the increasing amount of nations that shifted to democratic structures allowing people to vote and hold public office the impacts of nationalism as advancing the needs of statesmen and bureaucrats became even more pronounced. This is because the democratic structure opened itself more thoroughly to s tatesman achieving political power through igniting nationalistic impulses in the voting populace. 3. What were the goals and principles of the Congress of Vienna? How did delegates from the great powers respond to the grievances of their people? There were a number of goals and principles of the Congress of Vienna. From an overarching perspective the Congress of Vienna functioned as a means of European states to address many of the complex issues that had

Paying for College Essay Example | Topics and Well Written Essays - 1000 words

Paying for College - Essay Example There are some people who believe that though college expenses is one of the largest disbursement in a person’s life span, it should be treated as an investment which will give better income, extended career prospects and higher personal contentment as returns throughout one’s life. However, this investment is only possible at a minimum cost therefore, it is necessary to reduce college expenditure. My goal, in this paper, is to establish the point that reduction of college expenditure is absolutely indispensable. To achieve this goal, I have put forward the various reasons for reducing college expenditure in five different sections. In the first section, I have discussed about the negative impact of the debt burden on the parents and students who take loans to pay for higher education because of which reducing cost of education becomes necessary. The second section tells us how this high cost is affecting parents of all classes in the society which makes minimization of higher education costs urgent. In the third section, I have thrown light upon the fact that the high cost of education has made it inaccessible to most of the undergraduates in U.S. which in turn, is creating a deficiency in the workforce of the country. I have ended the paper with the fourth section in which I have discussed how reduction of high costs of college education will make U.S. competitive in the global economy. I have concluded with the fifth section where I have uphold the point that reduction of college education cost is deemed necessary and discussed, in brief, the steps which colleges and the federal government should undertake to reduce the high cost of higher education. However, before discussing these five sections, I would like to put forward the statistical trends of the increase in cost of higher education in recent years. STATISTICAL TRENDS The tuition fees of colleges and universities have been increasing four times faster than the inflation rate (see Fig. 1 ). The cost of educating has soared 439% since 1982 for colleges. The average tuition and fees is around $20,000 annually at a public four year college and it is nearly $30,000- $35, 000 at a private college (Chaudhari). Moreover, it has been predicted that the cost will rise as high as $ 1, 25,000 for a public college and $ 2, 50,000 for a private college by 2015. On an average, families shell out $64 billion annually to send 13.9 million students to public colleges and universities (Immerwahr). According to Rampbell, on an average parents pay for around 37% of the total cost of attending colleges from their savings and income, around 10% of the cost is arranged through borrowing by parents and rest of the expenses are borne by the students themselves or by taking financial aids. Fig. 1 College Tuition and Fees vs. Overall Inflation Debt Burden. There have been recent debates on whether college education should be reduced or not. According to me, it should be reduced because studen ts who study with borrowed money have to face lot of difficulty in paying it back in the long term, though there are some fortunate ones who get grants and scholarships (Chaudhari). There is great concern over the amount of debt students have to take for higher education, though some people argue that financial aids are easily available and payable for students who are willing to

Conflict of interest Case Study Example | Topics and Well Written Essays - 500 words

Conflict of interest - Case Study Example Most of the cases that are brought to the surface are of corruption, bribery, and money laundering. Despite the fact that these issues are worth concerning, but the conflict of interest that is exhibited by these institutions behind the scene and during interrogation phase is gross and vulgar (Hines & Reserve, 2014). Moreover, these acts not only violate the Charter of Human Rights, but it also disobeys the various international treaties, international law, and etc. Conflict of interest is a phenomenon that deals with the abuse of power, where public rights are compromised in order to obtain private gain. Everywhere all across the government and non-government organization one can find several examples of the officials who abuse their authority and position for obtain personal benefits. Conflict refers to disagreement, this disagreement can be on various levels, for instance it can be on the basis of violation of organization’s policy, it may be a disagreement in principle, or disagreement in practice and etc. Conflict of interest can also be dealt as an act of corruption, because it is the violation of trust, and misuse of a power entrusted to an official on a higher rank who is supposed to use the power for public security instead of personal profit. The case of Captain James CoBell is yet another example of a military official crossing his limits, and using his influence for satisfying his pleasure. CoBell was assigned the command of the fleet readiness commander Mid-Atlantic in 2011. In a press release by Naval Air System Command, quotes the investigation, by Commander, Fleet Readiness Centers "misused his position in using subordinates for personal favors, used abusive language toward his personnel and failed to properly account for personal leave," (Stewart, 2012). However, in response to the charges laid upon him, CoBell said that his tenure as Executive and commanding officer did not have any element

Effect Of Design On Paper Plane

Effect Of Design On Paper Plane I have decided to write my extended essay on this topic because this activity of flying paper planes was taught to us in our childhood when we were not mature enough to learn the principles of science and investigate and apply them to these planes. But what caught my interest was that how do paper airplanes of such light weights can maintain their flight and speed even while facing winds and other external factors. Firstly, I had decided to write my essay based on the principles used in these planes, but my supervisor guided me that it was too broad and thus, I narrowed down my topic to- To investigate the difference in the flight of the paper planes and the distance covered by it due to the shape, mass and design of the paper planes. Introduction: Paper airplanes are a source of fun and entertainment for many people while they can also be used as a part of learning and gaining some amount of knowledge about the real aeroplanes. Some people have also named this activity as an art named aerogami which derives from the name origami (a Japanese art of paper folding). But, this so called entertaining and competitive activity has a lot of science especially physics related to it as we can associate with different laws of aerodynamics and motion. Paper airplanes have designs ranging from simple planes for kids to competitive and complex ones like moth, tumbler, spike and many more to mention. As kids, we never used to think about these principles and designs that are associated with every part of paper planes from its formation to its flight. But, as a science student, I have got an opportunity to explore the various aerodynamic principles and get a deeper knowledge about the physics of paper planes. History: The history of paper planes is not quite specific as there have been many people who have contributed their theories in this field. Da Vinci who was a famous Italian personality is often regarded as the inventor of paper airplanes while some have the belief that Chinese people are the real makers of this art as they were the ones who invented paper and kites. The modern paper planes saw their creation in the year 1909 while its acceptance was seen in after two decades in the year 1930 by John Northrop. Actually, Northrop tried these designs in order to test the real principles of flying aircrafts. From the early centuries till the current years, there have been many changes and corrections made in the structure of paper planes such as in their shape, style, fashion and lift. Thus, the paper airplanes have seen a lot of modifications in their shape and principles over these years and this credit goes to each and every person who has contributed to it though the history is not quite fa mous or known. Aerodynamics and Paper Airplanes: Aerodynamics is referred to as the branch of mechanics that deals with the motion of air and other gases and with the effects of such motion on bodies in the medium. Aero planes and helicopters follow the principles and theorems of this study of science and this is the case in the working of the paper plane models. The various principles that are used in this study and more specifically in the working of paper planes are drag, lift, flight, thrust, weight and velocity. But I will be concentrating more on the flight of these paper planes in regard with my topic. Lift, thrust, weight (gravity) and drag are the four important factors in the working and the distance covered by paper airplanes. Thrust- Thrust is the force on the horizontal left hand side of the paper airplane which decides the flight of the paper plane and this force comes from the strength of the pilot (in this case the person throwing or flying the paper plane). While taking flight, this altitude is converted into forward motion, which results in the proper flight of the airplane. Lift- Lift is another force on the vertical upper hand side of the paper airplane. Usually, the air below the wing of the airplane push the air on the upper side and the air above the wing push the air on the lower direction. At this point when the lower air pressure is much harder than the upper one, then the airplane is able to fly. And also the wings of the airplane are curved which allows the air to move over the top more quickly, thus resulting in lift or upward push. Drag- Drag is the force that is present in the horizontal right hand side of the paper airplane which allows or decides the maximum distance of any paper airplane. A plane is said to have a lot of drag when the plane pushes a lot of air, in which the paper airplane does not fly more distance. But when the drag is as low as possible the plane is able to cover more distance due to the low amount of air pressure in the horizontal direction. Drag can be compared to the friction present on the surface when any object is moving. Weight (gravity) Weight or gravity is the force that covers the vertical lower hand side of the paper airplane. The airplanes weight must also be less so that it can fight the attraction of gravitation and thus, the plane will be able to fly more distance in the air. The greater the weight, the more the attraction and the lesser the distance covered. Thus, these are the four crucial principles that have to be observed for any paper airplane to fly in the air. But, are only these principles responsible for the flight of the airplane? Are there any other factors that are also important in deciding the flight of a paper airplane? Do the physical quantities or the structure of the airplane play a major role in planning the flight or the distance covered? In order to research and find out whether there are any other principles related to the flying of airplanes that are made out of paper, I have performed an experiment that brings out the result whether the shape, weight and the structure play an important role in determining the flight of the paper airplane. Experiment: Aim: To determine the relation between the designs, type of paper used in the paper plane and the flight or the distance covered by the paper plane. Hypothesis: I had the initial idea that the paper planes that are lighter in weight cover more distance as they have the capacity to move in the air with the force or the pressure of the wind. And I also felt that the paper airplane of design Moth will cover the largest distance as I have experimented and used this design many times for its smooth kind of flying. I usually thought that the type of paper and design are both equally important for the flight of paper planes. Variables: Dependent variable- The distance that the paper planes covers is the dependent variable. Independent variable- The type of paper used and the designs of the paper planes are the independent variables. Controlled variable- The force with which the person throws the paper planes can be controlled and also the height and the direction in which the paper planes are thrown are controlled. Uncontrolled variable- the force of gravity and the drag in the air acting on the paper planes are uncontrolled. Also, external factors such as wind, dust particles cannot be controlled. Apparatus: 7 X Meter scale/ Ruler of 100 cm 1 X Chalk 5 X Paper planes of different designs made up of cardboard paper 5 X Paper planes of different designs made up of A-4 size normal paper 5 X Paper planes of different designs made up of hand-made paper 1 X Analytical balance Note: The paper planes used in the experiment must be of 5 different designs but these designs must be used throughout for every kind of paper used. Procedure: 1. Make the following paper airplanes with the following types of paper- Design of paper airplane Type of paper Type of paper Type of paper Pictures Arrow Cardboard Hand-made A-4 size normal paper Moth Cardboard Hand-made A-4 size normal paper Flying fish Cardboard Hand-made A-4 size normal paper Wide Cardboard Hand-made A-4 size normal paper Unknown Cardboard Hand-made A-4 size normal paper Note that the flaps or the wings of the paper planes must be folded in the upward direction. 2. Gather all the apparatus needed to perform the experiment and select a wide, open and a large area without any obstacles such as pillars or other objects in the area where the experiment is performed. 3. Firstly, mark the initial position with the help of a chalk. This position is the point or the line from where the paper plane needs to be thrown. Note that the person throwing the plane with the help of his hands must not exceed or go behind the line while throwing the plane. The initial position needs to be constant for all the paper planes. 4. Take all the paper planes of design Arrow of materials- cardboard, hand-made paper and A-4 size normal paper. Take each one of them and fly them from the height of the shoulder of the person who is throwing the paper plane. Measure the distance covered by the plane with the help of the chalk. Mark the point where the plane falls on the ground and then measure the distance from the initial position. 5. Similarly, repeat the experiment with the paper planes of other designs. Measure and record the distances of all the planes and tabulate the readings. 6. Also, measure the weight of all the paper planes on the analytical balance and record them. Risk Management: While making the paper planes, see to it that the shape is symmetrical and the folds that are made on the wings must be equal on both sides. Also, note that the person flies the paper plane with enough force. This is because the capacity of the paper plane to fight against the drag in the air increases if the initial velocity of the plane is high. Important note: Note that the readings of the distance covered by the paper planes must be taken at least 5 times to reduce the errors during the experiment. Also, whenever the paper planes are thrown, the tip of the paper plane must be made straight so that the plane flies smoothly on the basis of its shape and the type of paper used because the fold or the improper tip of the plane may be an obstruction for the plane to cover its normal distance. Raw and Processed Data: Sr. No. Type of paper Design of paper planes Distance covered by the planes (centimeter) Average distance covered by the paper planes (centimeters) Weight of the paper plane (grams) 1.a. Cardboard paper Arrow 379.30 +0.1 340.70 +0.1 367.10 +0.1 323.00 +0.1 298.20 +0.1 341.66 +0.1 11.319 1.b. A-4 size normal paper Arrow 483.90 +0.1 670.50 +0.1 435.90 +0.1 458.30 +0.1 698.30 +0.1 594.38 +0.1 3.648 1.c. Hand-made paper Arrow 406.20 +0.1 425.10 +0.1 373.60 +0.1 395.80 +0.1 397.00 +0.1 399.54 +0.1 10.062 2.a. Cardboard paper Flying fish 299.10 +0.1 353.20 +0.1 381.40 +0.1 297.50 +0.1 292.20 +0.1 324.68 +0.1 13.511 2.b. A-4 size normal paper Flying fish 311.70 +0.1 373.00 +0.1 282.50 +0.1 344.90 +0.1 381.70 +0.1 338.76 +0.1 4.397 2.c. Hand-made paper Flying fish 287.30 +0.1 293.70 +0.1 366.00 +0.1 330.60 +0.1 360.30 +0.1 327.58 +0.1 12.483 3.a. Cardboard paper Moth 358.20 +0.1 399.10 +0.1 322.30 +0.1 371.70 +0.1 448.20 +0.1 379.90 +0.1 10.786 3.b. A-4 size normal paper Moth 492.90 +0.1 421.00 +0.1 455.80 +0.1 583.10 +0.1 502.60 +0.1 491.08 +0.1 4.395 3.c. Hand-made paper Moth 389.30 +0.1 324.20 +0.1 462.40 +0.1 387.00 +0.1 353.20 +0.1 383.22 +0.1 9.244 4.a. Cardboard paper Delta-Wing 276.00 +0.1 201.90 +0.1 250.10 +0.1 196.30 +0.1 227.00 +0.1 230.26 +0.1 14.371 4.b. A-4 size normal paper Delta-Wing 252.60 +0.1 259.40 +0.1 299.90 +0.1 274.70 +0.1 251.30 +0.1 267.58 +0.1 4.400 4.c. Hand-made paper Delta-Wing 296.20 +0.1 257.80 +0.1 231.60 +0.1 237.60 +0.1 241.50 +0.1 252.94 +0.1 11.196 5.a. Cardboard paper Paper Jet 226.40 +0.1 214.40 +0.1 183.20 +0.1 165.10 +0.1 180.70 +0.1 193.96 +0.1 12.948 5.b. A-4 size normal paper Paper Jet 335.10 +0.1 307.80 +0.1 362.30 +0.1 330.00 +0.1 405.40 +0.1 348.12 +0.1 3.907 5.c. Hand-made paper Paper Jet 336.40 +0.1 291.60 +0.1 337.90 +0.1 367.80 +0.1 337.20 +0.1 334.18 +0.1 7.927 The uncertainties in the experiment is + 0.1 cm because least count on the meter scale is + 0.1 cm. Observations: From the observation table, we can almost indicate that the heaviest paper plane in every type of design covers the shortest distance while the lightest paper plane covers the highest distance. We see that the paper planes made out of cardboard paper are the heaviest in every design of paper used and the ones made out of A-4 size normal paper are the lightest. But in the table, there is an observation for the paper planes of design Paper Jet where the distance covered has drastically reduced for the cardboard paper when we compare planes with other types of papers used and also when we see the difference between other types of paper planes. Conclusion of the experiment: From the above observation, we can state that the design and weight of the paper plane and the type of paper used are important to determine the distance covered by the paper airplanes as we obtain different readings of distances covered by the paper airplanes of different designs. But, here the question arises as to why the weight affects the flight of the paper planes and another question is that what are the other relevant factors that affect the flight of the paper planes. Wings functioning theory: Wings are important features of any object or creature when it comes to flight and balance in air. Birds have wings with the help of which they are able to fly and for fast transportation and development of technology, these principles of the wings were used in the making of aero-planes. And these wings also play a crucial role in enabling the paper airplanes to fly through air. According to Bernoullis principle in relation to aerodynamics, whenever the speed of air is greater, the pressure that the air exerts on the surface is lower and vice versa. Thus, we can relate this principle to paper airplanes and state that when the paper airplane is in air, the air passes through both- the upper as well as the lower part of the wings. Also, the wings have an angle of attack as the wings are not straight while passing through the opposite air drag and they create an angle with the air. According to my experiment, when the wings pass through the air, the angle of attack is created with the air and thus, the wings move upwards. This activity makes the speed of air greater in the upward part of the wing and reduces the speed in the lower part. On applying the Bernoullis principle, the pressure on the upper part reduces, thus creating suction with the wing and pulling them upwards. While the pressure under the wings increases and this pushes the wings in the upward direction. This helps the paper airplane to remain aloft and stable in the air. There is another principle that helps the paper planes remain in air for a longer time which is Newtons third law of motion which states that every reaction has an equal and opposite reaction. During the flight of the plane, the wings face a considerable amount of air coming towards it and when this air applies force or creates pressure on the wings, the wings, in return, apply force and pressure on the air which helps them to remain stable in the air. Thus, Bernoullis principle and Newtons third law of motion are both appropriate reasons for the flight of paper airplanes in the air with the help of the wings. Also, this theory varies accordingly with the different types of designs used in the experiment because not all planes have the same structure of wings and thus, the amount of pressure and the amount of force applied on the wings is different. For example, the arrow, moth and delta wing have the same type of wings that are mentioned in the theory (that is they are tilted upwards). But designs such as paper jet and flying fish have quite different shapes of wings that are evident from the diagram of the airplanes shown in the experiment. Thus, for the paper jet, there are several folds and flaps in the wing itself and thus, the amount of pressure and the reaction force from the wings towards the air, are different at different parts of the wings. One part of the wing has several folds on one another while one part has a smooth surface. So, the wings air pressure at the smooth surface of the wing may be different than the pressure and force on the folded surface. Thus, there are possibilities of various kinds of movements such as ups and downs or loops or nosedives of the plane and thus, there is a difference in the distance covered by these planes. So, we can draw conclusions that the design of the wings or the planes is on e factor that is responsible for the distance covered by the paper planes. Weight theory: The observation table from the experiment proves that for these designs, the greater the weight of the planes is, the lesser distance is covered by them. Drag is the horizontal force that acts on the paper plane when it flies through the air. Thus, this force becomes an obstacle for the plane to cover more distance. In order to fight and resist this air pressure, we need to have a strong material of paper which has the capacity to resist the air drag. From the materials of paper used, cardboard paper is the heaviest and we can thus, say that it has the largest amount of power to resist air drag. But, at the same time, there is a force of gravity acting downwards towards the ground surface. And according to theory of gravity, the more the weight of the object is, the greater is the attraction. Hence, we can say that though the cardboard paper is the heaviest, it also has a greater force of attraction due to gravity. This mixture of gravitational force and the air drag makes the cardbo ard plane cover the least distance. Thus, the weight of the paper used is one reason which affects the distance covered by the paper planes. The above theories indicate that the wing functioning theory forms the basis for which the paper airplanes fly and the weight theory determines the distance covered by the paper airplanes in relation to its weight. Though the normal paper has the least weight, the wind and the force from the person throwing the plane enable the plane to move smoothly in the air. Thus, as there is least attraction of gravity for this plane, it is able to fly farther distances. Thus, the weight theory in regard with drag and gravity helps to determine the distance covered by the planes. Evaluation of the experiment: Improvement of errors: While throwing the paper airplane, the force applied on every paper airplane might not be the same which leads to the variations in the readings obtained. In order to improve this error, the person must decide a particular fixed amount of force or energy that he will apply to the plane. This action can help to reduce some amount of errors. The experiment is performed in an open area where there are now windows or sources of high air flow. Though high amount of air flow is avoided, there is a possibility of some kind of passage of wind which might affect the flight of the paper airplanes. For example, the amount of wind present may not be equal all time and thus, this may affect the flight of planes accordingly. Thus, the thrower must use enough force that can help the paper airplanes to overcome gravity and fight the air resistance. The distance covered by each paper plane was measured five times in order to reduce systematic errors. This step may also affect the flight of paper planes sometimes as the landing of the paper planes is very which may include crashes with the ground surface. Due to crashing, the sharp tip or the nose of the paper plane may get disturbed or blunt. And this change in the shape of the tip may lead to the variations in distances covered. To overcome this error, the thrower must be careful and always try to straighten up the tip of the paper airplanes. By doing so, the crashing of the planes can be avoided and the normal flight of the paper planes can be maintained. The folds and flaps of the paper airplanes have to be done with perfection so that there is no problem with the flight of the planes and the planes can cover their actual distances. For paper airplane readings of paper Jet, we notice that the distance covered by the normal and hand-made paper is quite different and higher than that covered by the cardboard paper plane. The reason for this is the design and the stiffness of the cardboard paper. The design of this paper plane is very complex and it includes several minor and major folds and flaps. Due to the tough material of cardboard paper, it is very difficult to follow all the steps of the design. Thus, the design of this plane is not perfect enough and the folds also do not remain stable. This is the reason why the paper plane covers very less distance as compared to other planes of the same design. In order to avoid these construction errors, the person may change the type of design used that fits according to the material of paper used or the folds must be done carefully and a much better plane of the same design can be constructed. The apparatus used in the experiment such as the analytical balance and the meter scale must work properly to avoid systematic errors and the weight and distances of the paper planes must be measured carefully. The calculations such as the average distance must be correct to avoid any random errors.

Censorship On The Internet :: essays research papers

Censorship on the Internet Five years after the first world wide web was launched at the end of 1991, The Internet has become very popular in the United States. Although President Clinton already signed the 1996 Telecommunication ActI on Thursday Feb 8, 1996, the censorship issue on the net still remains unresolved. In fact, censorship in cyberspace is unconscionable and impossible. Trying to censor the Internet its problematic because the net is an international issue, there is no standard for judging materials, and censorship is an abridgment of democratic spirit. Firstly, censorship on the Internet is an international issue. The Internet was constructed by the U.S. military since 1960s, but no one actually owns it. Thus, the Internet is a global network, and it crosses over different cultures. It is impossible to censor everything that seems to be offensive. For example, Vietnam has announced new regulations that forbid "data that can affect national security, social order, and safety or information that is not appropriate to the culture, morality, and traditional customs of the Vietnamese people." on June 4, 1996. It is also impossible to ban all things that are prohibited in a country. For instant, some countries, such as Germany, have considered taking measures against the U.S. and other companies or individuals that have created or distributed offensive material on the Internet. If the United States government really wanted to censor the net, there is only one solution - shut down all network links of other countries. But of course that would mean no Internet access for the whole country and that is disgust by the whole nation. Secondly, everyone has their personal judgment values. The decision of some people cannot represent the whole population of those using the net. Many people debate that pornography on the net should be censored because there are kids online. However, we can see there are many kids of pornographic magazines on display at newsstands. It is because we have regulations to limit who can read certain published materials. Likewise, some people already use special software to regulate the age limit in cyberspace. Why do people still argue about that? It is all about personal points of views. Justice Douglas said, "To many the Song of Solomon is obscene. I do not think we, the judges, were ever given the constitutional power to make definitions of obscenity."II. In cyberspace, it is hard to set up a pool of judges to censor what could be displayed on the net. Thirdly, censorship works against democratic spirit, it opposes the right of free speech and is a breach of the First Amendment.