Role Of Airplanes In World War II Essays - Airplane, Model Aircraft

Role of Airplanes in World War II Role of Airplanes in World War II Chapter 1: War itself Flying started when the first people on earth saw a bird flying in the sky, we were amazed of seeing how freely they could move and to know that you could reach any place on earth with this ability, since then our dream had been follow them. People then tried to make this dream possible, the result in all cases was serious pain and failure after failure. A lot of time passed since the first time we dreamed of being able to fly, but we finally achived this goal. Two brothers were able to do the first flight on history, this brothers were the Wrights brothers who achived the goal of all the humankind, even know when someone thinks of airplanes they think on the Wrights brothers, because thanks to them in 1903 the world had his first flying machine. But the plane's status changed because of time. The porpuse of this flying machines was to achive our goal, to fly and see the world, to imitate wonderful animals such as birds, but people had never thought that they could use airplanes as a war machine. After it was invented we were so eager to seek destruction that we saw the potential of using it to kill ourselves. It all started when we saw that people on the ground were indefencseless with this new war toy. They found a lot of new uses for it for example: they used them to spy on their enemys, to know where they were heading, to make maps and startegies on what will be the most useful way of attacking them, and this was its use during the first World War. This war was fought on land not on the air as the second war. People didnt knew that their dream could be their mourder. After the war ended countries started to look how to improve their new war toys, they put factories to try to make airplanes reach a higher velocity, altitutde, range etc... There was a war between wars to see who was better, Americans made their airplanes, English tried to make their Royal Air Force the best one, Japanese wanted to make their airplanes lighter and faster, but the real winner in this war were the Germans, their airplanes could travel long range, they were easy to maniubrate and ofcourse they were able to use them for massive destruction against other countries. Thanks to airplanes the Germans were the powerful nation they were during the war. But why did Germans built better airplanes, well there were some reasons like : Germans live in a country with many mountains, people liked to fly model airplanes and make contests to see which were the best ones, from this models a lot of airplanes were constructed. Another reason was that their scientists were very ingenious, people wanted revenge from all the other countries. Their curiosity and their intelligence lead them to make the best war toys in hisotory of war. After World War I Germans were humiliated, they burned their own money for fuel. They had nothing left, they just seeked for revenge, war has always been part of German's culture. But another thing German's have is that they are really smart, they dream of making things but they have a difference over all other nations, they dreams do become true, but they become true because of their intelligence and because they never give up. The versailled treatment was just like a tentation to make they come to life again, they realized to late that this treatment was not peace, it was just an intermission for the worst war ever in history, the first in where land, air and sea were involved. Logic happened the Germans broke the Versailles trateament and started to build a strong army, they used all their money for warfare, between this machines was the airplane. Airplanes were considered the most valuable arm the Germans had, with this machines they could bomb entire cities in just questions of days and then send their soldiers to finish the work making war very fast and easy to win, this concept was know as the Blitz Krieg. Some of this airplanes were the U2 bomber and his brother, they were a two engine plane that could carry a larg number of bombs and soldiers for attack.. Countries as Poland and Austria saw how easily their armys were defeated because of this new war machines that Germans were using. They didn't realized that

Extraterrestrial Life essays

Extraterrestrial Life essays As biologists learn about life on Earth in all its diversity, and at the rate that new planets are being discovered the search for life elsewhere grows more steadily pressing. We have discovered organisms on the Earth that seem tenacious and tough almost to a fault; they thrive in the most seemingly adverse conditions imaginable, and organisms so fragile and specialized so as to exist in only the most isolated and pristine environments. With the knowledge of this great amount of diversity it is a safe bet that we will one day find organisms in other parts of the galaxy that are not indigenous to the earth. This richness of diverse life though is comprised of creatures that could only survive on the Earth, so in order to draw any strong conclusions life must be found elsewhere. Due to their relative proximity the planets of our own solar system are the best place to start this search. And finally what types of organisms could we expect to find on other planets judging from the sam ples on earth? Even with the great diversity of life on earth and new species being discovered almost daily it is unlikely that any terrestrial creatures could survive in the environments of the other planets we have discovered thus far. There is compelling evidence of flowing water on mars and that the moons of Jupiter could contain even vast frozen oceans but these are still unknowns. The other planets we have discovered outside of our solar system all appear to be gas giants similar to the gas giants of our own solar system and these planets and these planets seem like the least likely place to harbor any organisms that we know of. But we must work with the knowledge that we already have and apply the template of life to the rest of the universe since what we have learned of life on earth is all that we know however unlikely it may seem that any of the terrestrial organisms could survive off the earth. We must find organi ...

Semantic Web Essay Example | Topics and Well Written Essays - 2500 words

Semantic Web - Essay Example It may be said that these systems contained limited amount of research material. Rather than storing in cupboards, papers and books were stored in machines, which definitely improved the research strategy. It laid the basis of what we know as ‘Web’ today. With the advancement in technology, and initiation of internet, the landscape of research tools began to change. Late 1990’s is registered with some remarkable changes in the techniques of research tools (Baker & Cheung, 2007). In 2001, the introduction of ‘Web’ revolutionized the conventional ways of research. This initial Web design served as the storage of billion of documents. Researchers were allowed to access their desired content, and read it. This made Web an advance form of library. The first version of the World Wide Web, Web 1.0 facilitated the users to search ‘online library’ to the extent of reading only. The speed was fast, and the technology was new, so it got popular very quickly. The need of improvement was felt when the technology started revolutionizing, and access was limited. The updated version of web, Web 2.0, brought some drastic changes in the web research tools. It promoted human interaction with web. Now the Web did not serve the purpose of a just a library, but it became an interactive tool where people were allowed to alter the research content. The Web stuff was not a read-only material, but it also allowed users to make changes, write their own papers. It was the change that was instantly felt by the users. This laid the basis of the social networking. The Semantic Web is the next generation of the Web, which attempts a precise automatic filtering of information. For this, it is necessary to make the information that resides on the Web which is understandable by the machines. With this, we can determine that the Semantic Web is about different fields, first is a set of languages and procedures to add the semantics to information that is understandable by the

Education Essay Example | Topics and Well Written Essays - 1000 words - 4

Education - Essay Example After the final work, you will find the areas in your work I edited. The ideas I added are typed in RED to make you spot the new additions. I have also attached one more article that I used. If your teacher requests for it, you may provide it to him. Thank you and hoping we work again in the nearest future since my field is Education. Isaac #72032 TUI UNIVERSITY Grear Dale III MAE 515 MOD 3 SLP Dr. Xiaoying Wu February 21, 2011 Texas Public School System Education is an important aspect of society. In the view of Goer (2007), education has an enormous impact on the human society. It trains the human mind to think and take the right decision. To this effect, human is regarded as a rational being and distinguished from other animals when he is educated to take control of himself and over the environment around him. Education therefore equips humankind with the knowledge to take charge over his immediate environment and make it suitable for his existence. It is for the reason of this im mense impact of education that States all over the world adapt educational systems that will be most suitable to the needs of its citizens and help solve the immediate problems of its people. To ensure that the adapted educational system meets the expectation of society, there are systems put in place to check for success and progress of the entire educational system. Checking for success of the educational system includes checking whether the curriculum answers the most immediate perturbing issues of society and whether stakeholders in the educational system; including students and teachers are living up to the standards of the educational system. The system that is used for checking whether the educational system is up to standard is commonly referred to as assessment. In the State of Texas, the public school system is one of the most esteemed forms of education. Texas’ public school system continues to use a variety of assessments in which to evaluate curriculum and teache rs/instructors. Assessments are conducted by students in determining where their school ranks within districts throughout the state. The rankings are not always used in a positive manner. Some assessments are in an attempt to solicit student enrollment into certain school districts. The State of Texas’ overall intent for its ranking procedure and policies is also used to promote schools as Magnet schools, which is a positive step to improve student outcomes. Magnet schools throughout the state of Texas receive much more funding regular schools. It focuses on special funding for special programs and compensation to teachers/instructors who deliver their curriculum to a certain standard. It is noticeable that the typical standard school receives far less funding and therefore students are less likely to receive the same standard of education. The intent of this analysis is to compare certification programs and evaluation requirements for teachers as well as students within the state of Texas school districts. What is a Magnet School? The article â€Å"Public School Review,† suggest that the difference between a Magnet and regular public schools â€Å"is that they usually have something special to offer over a regular school, which makes attending Magnet schools an attractive choice to many students, thereby increasing the diversity of the student population within them.† (Chen, 2007) Students who are privileged to enroll in Magnet schools

Philosophy Research Paper Example | Topics and Well Written Essays - 500 words

Philosophy - Research Paper Example The college was founded by Pastor Jonathan Blanchard in the year 1860. Blanchard was an abolitionist who was a pioneer in the abolishment of slavery (Wheaton Heroes, par. 2). He was also strongly against Freemasonry and possessed strong Christian and cultural values. These are both indications of the values upon which the college was built. Jonathan Blanchard was also the college’s first president and was later succeeded by his son. Currently the president of the college is Philip Ryken (Wheaton, par. 4). In total the college has had eight presidents. At the current moment, Wheaton has approximately 2500 students from each of the states in America and approximately 50 countries all over the world (U.S News, par. 1). It is one of the most highly ranked Christian colleges and its mission is to build the church and improve the world (Wheaton College, par. 3). It aims to fulfill these goals using the philosophies of its founders which were centered on humanitarian activities. The college aims to promote the role of Christians in the community and attempts to achieve this mission by implementing programs of excellence into a solid Christian education (Wheaton College, par. 3). These programs and policies adhere to the college motto, â€Å"For Christ and His Kingdom† (Wheaton College, par. 2). Another major aim of Wheaton College is to establish more churches and spread the word of God. This philosophy can be seen in action as students from this college are able to fulfill their role in society in approximately 60 countries due to several service projects and programs that have been initiated by the college (Wheaton College, par. 1). Students from the college perform researches and participate in other academic activities in Latin America, Europe and the Middle East. It also has an HNGR program which enables graduates to complete their internship in developing countries (About HNGR, par. 2). The

Various Components Of Computer Network Structure Information Technology Essay

Various Components Of Computer Network Structure Information Technology Essay What are the various components of Computer Network structure. Explain in brief. Write down the differences between connection oriented and connectionless services. Explain in brief the topologies that are used for broadcasting type of communication. Television channels are 6MHz wide. How many bits/sec. can be sent if four levels digital signals are used? Assume a noiseless channel. Which of the OSI layer handles each of the following: Breaking the transmitted bit stream into frames. Determining which route through the subnet to use. Providing compatibility in data and text. Providing terminal compatibility. Providing facility for remote login. Sketch the Manchester and Differential Manchester encoding for the following bit stream: 0111000111001101 For differential Manchester encoding assume the line is initially in the low state. UPTU 2007-08 Attempt any two parts of the following: (102=20) What do you mean by a computer network? Explain in detail various goals and applications in real life of computer networks. Give different categorization of the computer networks. What are internetworks? How you will categorize internetworks using above categories of computer networks. Give a detail description of the functionality of different layer of OSI model. UPTU 2008-09 Attempt any two parts of the following: (102=20) (i) What do you mean by network topology? Explain in brief any three such network topologies. (ii) What is difference between TCP/IP and OSI model? What are channel types in ISDN to construct the transmission structure of any access link? Explain them. Which types of transmission media are used at physical layer transmission? Give a comparative study of different transmission media in guided media. When unguided media is suitable for transmission? UPTU 2009-10 Attempt any two parts of the following: (102=20) What are the reasons for using layered protocol? A system has an n-layer protocol Hierarchy. Applications generate messages of length M bytes. At each of the layers, an h-byte header is added. What fraction of the network bandwidth is filled with headers? (i) If a binary signal is sent over a 3-kHz channel whose signal-to-noise ratio is 20 dB, what is the maximum achievable data rate? (ii) What is the percent overhead on a T1 carrier; that is, what percent of the 1.544 Mbps are not delivered to the end user? Explain the advantages and disadvantages if any of the following topologies: (i) star (ii) ring (iii) bus (iv) mesh UNIT II UPTU 2006-07 Attempt any four parts of the following: (54=20) Suppose that the string 0101 is used as the bit string to indicate the end of a frame and the bit stuffing rule is to insert a 0 after each appearance of 010 in the original data; thus 010101 would be modified by stuffing to 01001001. In addition, if the frame proper ends in 01, 0 would be stuffed after the first 0 in the actual terminating string 0101. Show how the following would be modified by this rule? 11011010010101011101 Measurements of an infinite user slotted ALOHA channel show that 10% of the slots are idle: (i) What is the channel load, G? (ii) What is throughput? (iii) Is the channel underloaded or overloaded? Consider an error free 64-Kbps satellite channel used to send 512 byte data frames in one direction, with very short acknowledgement coming back the other way. What is the maximum throughput for window sizes of 01 and 07? A bit stream 10011101 is transmitted used the standard CRC method. The generator polynomial is x3 + 1. Show the actual bit string transmitted. Suppose the third bit from the left is inverted during transmission. Show that this error is detected at the receivers end. Explain Basic-Bit-Map (a collision free protocol) used at MAC sublayer. Sixteen stations, numbered 1 through 16, are contending for the use a shared channel by using the adaptive Free Walk Protocol. If all the station whose addresses are prime number suddenly becomes ready at once, how many bit slots are needed to resolve the contention? UPTU 2007-08 Attempt any two parts of the following: (102=20) What is Hamming code? For the following word pattern (message) find out the number of check bit and the bit at eleventh position. If any error is detected, show it. M = 1111 1010 0000 1110 What are medium access control (MAC) protocols? Discuss salient feature of CSMA/CD protocol. Describe the bit stuffing rule used the HDLC protocol. Consider a CSMA/CD network running at 200 Mbps over a 1 Km cable with no repeaters. The signal speed is 2 * 108 m/sec. Compute the minimum frame size. UPTU 2008-09 Attempt any two parts of the following: (102=20) What do you mean by ALOHA? How does slotted ALOHA improve efficiency? SEC(7,4) hamming code can be converted into a double error detecting and single error correcting code (8,4) by using an extra parity check. Construct the generator matrix for the code and show that the code is quasi perfect. Design a decoder for the code. Explain the IEEE 802.3 MAC sublayer frame format. What is the binary exponential back off algorithm? UPTU 2009-10 Attempt any two parts of the following: (102=20) A large population of ALOHA users manage to generate 50 requests/sec, including both originals and retransmissions. Time is slotted in units of 40 msec. What is the chance of success on the first attempt? What is the probability of exactly k collisions and then a success? Explain the working of CSMA/CD protocol. Why there is a minimum frame length restriction in CSMA/CD? Explain the working of GO-BACK N ARQ protocol. How it is different from selective repeat ARQ? UNIT III UPTU 2006-07 Attempt any two parts of the following: (102=20) Write and explain the kinds of shortest path routing Algorithm in brief. Find the shortest path in the following subnet using Dijsktra Algorithm, when the source is fixed but destination is not fixed. Describe the choke-packet method of congestion control. You are also required to explain the variation in the above mentioned algorithm. Explain the concept of Tunnelling in Internetworking. Write down the difference in IPv4 and IPv6. UPTU 2007-08 Attempt any two parts of the following: (102=20) Answer the following question: How is IPv6 different from IP protocol? Convert IP address whose hexadecimal representation is C22F1582 to dotted decimal notation. A class B class network on the internet has a subnet mask of 255.255.240.0. What is the maximum number of hosts per subnet? Explain the purpose of subnetting. What is Link Control Protocol? Give the format of LCP packet. Also how authentication is supported in PPP? Explain. (i) A computer on a 6-Mbps network is regulated by a token bucket. The token bucket is filled at a rate of 1 Mbps. It is initially filled to a capacity with 8 megabit. How long can the computer transmit at the full 6 Mbps? (ii) Discuss the token passing technique used in FDDI. UPTU 2008-09 Attempt any two parts of the following: (102=20) What is the congestion in network layer? Differentiate and explain Leaky-Bucket algorithm and Token Bucket algorithm? What is the role of routing algorithm? Explain the working of Distance Vector Routing algorithm with the help of a suitable example. (i) Explain various phases through which a PPP connection goes using transition state diagram. (ii) What is the significance of IP address classification? What problems of IPv4 are being addressed by IPv6? UPTU 2009-10 Attempt any two parts of the following: (102=20) A computer on a 6-Mbps network is regulated by a token bucket. The token bucket is filled at a rate of 1 Mbps. It is initially filled to capacity with 8 megabits. How long can the computer transmit at the full 6 Mbps? Give a classification of IP addresses used in the Internet. Suppose that instead of using 16 bits for the network part of a class B address originally, 20 bits had been used. How many class B networks would there have been? (i) The protocol field used in the IPv4 header is not present in the fived IPv6 header. Write your justification. (ii) IPv6 uses 16-byte addresses. If a block of 1 million addresses is allocated every picosecond, how long will the addresses last? UNIT IV UPTU 2006-07 Attempt any two parts of the following: (102=20) Describe Transmission Control Protocols (TCP) Transmission policy. Explain the Remote Procedure Call with suitable diagram. You are also required to explain the use of RPC in Transport layer. Imagine that a two-way handshake rather than a three-way handshake were used to set up connections. Are deadlocks now possible? Give an example or how what none exist. UPTU 2007-08 Attempt any two parts of the following: (102=20) Why does UDP exist? Would it not have been enough to just let user processes send raw IP packets? What are two army problem and a three way handshake? State the elements of transport protocol. Describe the feature of the following devices: Routers Bridges Gateway UPTU 2008-09 Attempt any two parts of the following: (102=20) A TCP connection is using a window size of 1000 B and the previous acknowledgement no was 22,001. It receives a segment with acknowledgement no 24,001. Draw a diagram to show the situation of the window after and before the acknowledgement is received. If the window size is change to 11000B and 9000B separately, than what will be the situation? Discuss the issue to be considered in designing different layers. (i) What is user datagram protocol? Give its datagram format. (ii) Would it not have been enough to just let user processes send raw IP packets? Give reason in support to your answer. UPTU 2009-10 Attempt any two parts of the following: (102=20) Draw the TCP header format and explain its various fields. A TCP machine is sending full windows of 65,535 bytes over a 1-Gbps channel that has a 10-msec one way delay. What is the maximum throughput achievable? What is the line capacity? Explain Connection Management at the transport layer in detail. UNIT V UPTU 2006-07 Attempt any two parts of the following: (102=20) Explain the architecture of Electronic Mail (i.e. E-mail). Describe the concept of Domain name System in brief. Explain the working of server side in the architectural overview of World-Wide-Web (WWW). UPTU 2007-08 Attempt any two parts of the following: (102=20) One secret key encryption method involves the permutation of bits. For example an 8 bit plain text is permuted, bit 8 becomes bit 3, bit 1 becomes bit 2 and so on. Draw a diagram to show the mapping of each bit to its new designation. Scramble the bits as you please. What is encryption and decryption algorithm? What do you mean by following : HTTP SNMP How MPEG file format is different from JPEG file format? Encode the following message using Huffman coding: INDIAN INNING Write short note on one of the following : Network security and cryptography Electronic mail and FTP. UPTU 2008-09 Attempt any two parts of the following: (102=20) One secret key encryption method involves the XOR operation. A bit patter (plaintext) of a fixed size in XORed with a block of bits of the same size to create to fixed sized cipher text. What is the encryption algorithm here? What is the decryption algorithm here? Remember that an XOR algorithm is a reversible algorithm. (i) Why do we need Domain name space when we can directly use an IP address? (ii) What is trivial file transfer protocol? How it is different from simple FTP? (i) What is the role of digital signature in cryptography? (ii) What is JPEG standard? How it is different from JPEG 2000? UPTU 2009-10 Attempt any four parts of the following: (54=20) Can a query message in DNS have one question section but the corresponding response message have several answer sections? Describe the addressing system used by SMTP. Describe the functions of the two FTP connection. What is anonymous FTP? Compare the way SMTP and HTTP transfer images. Which one do you think is more efficient? Why? The Diffie-Hellman key exchange is being used to establish a secret key between Alice and Bob. Alice sends Bob (719, 3, 191). Bob responds with (543). Alices secret number, x, is 16. What is the secret key? Can IPsec using AH be used in transport mode if one of the machines is behind a NAT box? Explain your answer.

College Admissions Essay - Rewards of Understanding :: College Admissions Essays

College Admissions Essay - Rewards of Understanding As a high school freshman, I met and became friends with many new people. Among the most fascinating people was Lauren. I met Lauren in my lab class. She was outspoken and liberal. Her clothing revealed creativity; her big eyes, curiosity and strength. I was interested in learning more about Lauren, but felt shy about approaching her. My peers made fun of Lauren's manners and actions. They considered her too strange to know and shunned her. This prejudice made me realize I was not interested in knowing people who criticize based on observation rather than experience. Still, I said nothing in her defense. Recently, I traveled with my art class to Williamstown, Massachusetts. That was when I got to know and became friends with Lauren. She and I talked during the bus ride as she revealed to me unimaginable secrets. Lauren told me about her lifelong battle with Depression and Attention Deficit Disorder (ADD). She also told me about her suicide attempts. She said, "When I was a kid, I was a dork and never good at anything social. Many times I would do or say the wrong thing. I felt rejected and lonely." I remembered those who mocked Lauren and felt angry at them. People's cruelty can be very painful even to those who appear strong and especially to those who live with emotional and social challenges. That is why it is crucial to understand someone before judgment and not act with brutality to those who are different. Lauren told me that art was her greatest passion. "Art is the only thing that has kept me sane because I can escape into it," she said.