The Big Bang Essays - Physical Cosmology, Astronomy, Physics

The Big Bang It is always a mystery about how the universe began, whether if and when it will end. Astronomers construct hypotheses called cosmological models that try to find the answer. There are two types of models: Big Bang and Steady State. However, through many observational evidences, the Big Bang theory can best explain the creation of the universe. The Big Bang model postulates that about 15 to 20 billion years ago, the universe violently exploded into being, in an event called the Big Bang. Before the Big Bang, all of the matter and radiation of our present universe were packed together in the primeval fireball--an extremely hot dense state from which the universe rapidly expanded.1 The Big Bang was the start of time and space. The matter and radiation of that early stage rapidly expanded and cooled. Several million years later, it condensed into galaxies. The universe has continued to expand, and the galaxies have continued moving away from each other ever since. Today the universe is still expanding, as astronomers have observed. The Steady State model says that the universe does not evolve or change in time. There was no beginning in the past, nor will there be change in the future. This model assumes the perfect cosmological principle. This principle says that the universe is the same everywhere on the large scale, at all times.2 It maintains the same average density of matter forever. There are observational evidences found that can prove the Big Bang model is more reasonable than the Steady State model. First, the redshifts of distant galaxies. Redshift is a Doppler effect which states that if a galaxy is moving away, the spectral line of that galaxy observed will have a shift to the red end. The faster the galaxy moves, the more shift it has. If the galaxy is moving closer, the spectral line will show a blue shift. If the galaxy is not moving, there is no shift at all. However, as astronomers observed, the more distance a galaxy is located from Earth, the m ore redshift it shows on the spectrum. This means the further a galaxy is, the faster it moves. Therefore, the universe is expanding, and the Big Bang model seems more reasonable than the Steady State model. The second observational evidence is the radiation produced by the Big Bang. The Big Bang model predicts that the universe should still be filled with a small remnant of radiation left over from the original violent explosion of the primeval fireball in the past. The primeval fireball would have sent strong shortwave radiation in all directions into space. In time, that radiation would spread out, cool, and fill the expanding universe uniformly. By now it would strike Earth as microwave radiation. In 1965 physicists Arno Penzias and Robert Wilson detected microwave radiation coming equally from all directions in the sky, day and night, all year.3 And so it appears that astronomers have detected the fireball radiation that was produced by the Big Bang. This casts serious doubt on the Steady State model. The Steady State could not explain the existence of this radiation, so the model cannot best explain the beginning of the universe. Since the Big Bang model is the better model, the existence and the future of the universe can also be explained. Around 15 to 20 billion years ago, time began. The points that were to become the universe exploded in the primeval fireball called the Big Bang. The exact nature of this explosion may never be known. However, recent theoretical breakthroughs, based on the principles of quantum theory, have suggested that space, and the matter within it, masks an infinitesimal realm of utter chaos, where events happen randomly, in a state called quantum weirdness.4 Before the universe began, this chaos was all there was. At some time, a portion of this randomness happened to form a bubble, with a temperature in excess of 10 to the power of 34 degrees Kelvin. Being that hot, naturally it expanded. For an extremely brief and short peri od, billionths of billionths of a second, it inflated. At the end of the period of inflation, the universe may have a diameter of a few

Free Essays on Hindus

Hindus The story, â€Å"Hindus† tells about the fading away of cultures, in this case, one’s attitude towards one’s country if one has been away from one’s country for quite sometime. I think that the story fits under the section ‘Caste and Class’ because it focuses on the people’s way of thinking towards their countries’ social values and class. For example, Pat was in favor of American values and way of life. He was once in jail for selling an Indian painting, which was a family heirloom, just for money. The story also tells how one’s family background heritage gets faded away once one stays away from one’s country for too long. It seems that the Indians in America who are immigrants, have a much better off life and social class here in America than in their own country. For example, the Patels, who had been in the States for eighteen years, had been fortunate in having only sons, who were even pursuing higher education; with daughters, there would have been pressure on them to return to India for a proper, arranged marriage. (482) Therefore, with the different attitudes the characters in the story have on their heritage/country, the story should fit into the category of ‘Caste and Class’.... Free Essays on Hindus Free Essays on Hindus Hindus The story, â€Å"Hindus† tells about the fading away of cultures, in this case, one’s attitude towards one’s country if one has been away from one’s country for quite sometime. I think that the story fits under the section ‘Caste and Class’ because it focuses on the people’s way of thinking towards their countries’ social values and class. For example, Pat was in favor of American values and way of life. He was once in jail for selling an Indian painting, which was a family heirloom, just for money. The story also tells how one’s family background heritage gets faded away once one stays away from one’s country for too long. It seems that the Indians in America who are immigrants, have a much better off life and social class here in America than in their own country. For example, the Patels, who had been in the States for eighteen years, had been fortunate in having only sons, who were even pursuing higher education; with daughters, there would have been pressure on them to return to India for a proper, arranged marriage. (482) Therefore, with the different attitudes the characters in the story have on their heritage/country, the story should fit into the category of ‘Caste and Class’....

How to maintain Mr. Juicy as the market leader in the Hong Kongs Essay

How to maintain Mr. Juicy as the market leader in the Hong Kongs chilled juice market - Essay Example The health conscious nature of the company was reflected in in 2003, when Mr. Juicy introduced a new formulation, adding vitamins A, D, E and soluble fibre. The mascot has evolved from "Mr. Juicy Fresh" to "Mr. Juicy Fit". In 2005, Mr. Juicy Fit undergoes a packaging revamp exercise, in which the product attributes for health elements are highlighted. This illustrates that A.S.Watson group has been transforming Mr.Juicy according to the market needs to some extent. At the same time, fruit graphics are employed to enhance the wholesomeness of the brand. However to continue its leading position there is a strong necessity to formulate management strategies. It also require strong marketing plan and an exercise to analyse the existing problems or weaknesses so that the opportunities and strengths can be maximized. The channel stewards should be introduced which will take care of customer needs immediately. Internet marketing plan has to be generated which reduces its cost of supply to t he customers. The feed back of the customers has to be accurate and timely to make necessary improvements. Improvement plan has to be made keeping the future issues in mind. Keeping these in view an exercise has been made to prepare a management plan with a major objective of maintaining the number one position of Mr. Juicy in Hongkong market. The A.S. Watson Group is a leading company that produces and markets a full range of fruit juices, soft drinks, tea and cooling drink products in Hong Kong and the Mainland. With a history dating back to 1828, the A.S. Watson Group has evolved into an international retail and manufacturing business with operations in 36 markets worldwide.   At present, the Beverages Division operates two plants, producing bottled and canned soft drinks, and fruit juices. Among the major brands marketed by the company are: Sunkist, Mr. Juicy, Watsons cordials and mixers, Crystal Spring teas, and Sarsae carbonated drink and MJ cooling drinks in

Juvenile Justice Policy Essay Example | Topics and Well Written Essays - 1750 words

Juvenile Justice Policy - Essay Example They are not wary of what will happen next because it is their choice. They took that risk with the rationality of mind that it will be for the better. But the cases I have stated above are something that can not be applied to all societies and countries. For one apparent reason not every family can afford to send their children to school. Another reason is that there is an issue about removing children away from their family and sending them to a residential schools or boarding schools. This is a policy that many people are against with because there is the violation of the freedom to choose. Affected families have also stated different repercussions of the policy to the children and to the families of the children. Since it is a policy, no one can go against with it. But the question remains, is the policy really effective Do the policy makers uphold the objectives of the policy And have they really thought of welfare of the kids Or they are just serving their vested interests In the United States there is a policy wherein the Juvenile or the Family Court has given the authority to remove the children from their homes because of the following reasons: 1.) The child has been delinquent; 2.) The child has no parents making him or her dependent or abandoned and the child has no guardian; 3.) The needs of the child are not supplemented by his or her family - he is neglected; and lastly, 4.) The child is being abused in any forms or in any way. Aside from this policy, there is another existing policy that is similar to the one I have mentioned above but is very different in terms of the grounds why there is a need for removing kids from their home. The policy is very popular in North America where you can find most of the American-Indian. And the policy is removing Native American children from their homes and sending them into residential schools where according to the authorities it would help the children to learn civilizing lifestyle. Thus making them 'civ ilized' people. Historical Justification of the Policy and Its Implementation It all started when European Missionaries came to North America and lives with them. Through their observations they noticed that the people are 'uncivilized'. So they thought that it is best for the community of the Native Americans if they would separate the children away from their families. By doing so, the children will be taught on how to be a 'civilized' person (following of course the European lifestyle). The European Missionaries then build residential schools. They have stated two reasons, and these are: 1.) the very apparent reason is separating the children away from their family; and 2.) they believe that native culture is not worthy to preserve. That time they have in mind and they do believe that native culture is no use and soon it will eventually die. They also believe that all people would develop into someone like the civilized Europeans who consider themselves as advanced. The European Missionaries run this policy but in the long run the Canadian churches and the government helped the missionaries in implementing the policy. It is then that it became an official Canadian policy in support for educating American-Indian Children. The residential schoo

A Short story Essay Example | Topics and Well Written Essays - 1250 words

A Short story - Essay Example Based on his dad interest in driving and education, Tom used to be driven to the school every day in the morning and in the evening. His father, though a good driver who emulated the road signs and rules was a tough driver who drove with a high speed unless there was a traffic jam. During his trip to the school, Tom used to ask his father many questions as to why he was driving in that high speed and go between cars yet the car was not involved in an accident. His father did not lie to him but informed Tom that diligent and confident is the major aspect that a good driver is supposed to follow. This made Tom to have an interest in driving. Tom’s dad was a person who wanted his children to develop their career at their early ages. During the holidays, Tom used most of his free time driving with James, his father. In this way, Tom closely interacted with his father and he was in a better position to ask all the disturbing questions that he was asking as they were driving to and from the school. His father on the other hand, allowed Tom to drive in flat areas where there were no cars in order to avoid accidents. Most notably, the father taught Tom on all the aspects of driving including the physical parts of a motor vehicle and the road signs. When being taught by his father Tom used to disturb him with all sought of questions. Being eager to know how to drive and become an excellent driver, Tom loved the way his father drove the family and this inspired him. Whenever the car could get a puncture, James would repair the puncture and the journey would continue without delay. The basic mechanic process that Tom†™s dad used to undertake any time the car experienced problems inspired Tom since he would look at his father going down the car and try to make things work in the right manner. Though Tom’s dad used to allow Tom to drive in lowlands and where their were no vehicles, his father one day as they were driving from school to

An Introduction To Encryption And Decryption

An Introduction To Encryption And Decryption CHAPTER 1 This thesis proposes a VHSIC Hardware Description Language (VHDL) design of Encryption and Decryption Algorithm for Data. In this chapter, the challenges of cryptography is firstly presented. This chapter also briefly discusses the problem definition, scope of work and the thesis objectives are also highlighted.Finally, the chapter end with the chapter organization. The dissertation presentation is provided at the end 1.1 An introduction to Encryption and Decryption, a type of cryptography Encryption and Decryption, a type of cryptography, refers to the process of scrambling information so that the observer cannot be detecting the data. Cryptographic key is a piece of data used to encrypt or decrypt to plaintext. (Alex Brennen V., 2004) The Crypto, from the word cryptographic mean is it has its origins in the Greek word KRUOTOS, which means hidden. Thus the objective of cryptography is to hide information so that only the intended recipient can read it.[2] . Cryptographic is a protocol or method of performing encryption and decryption (Alex Brennen V., 2004). There are two types of cryptographic: symmetric and asymmetric key. Figure 1.1 is example a symmetric cryptographic has a single key, which is used for both encrypting and decrypting information. Data Encryption and Decryption is a well-known example of symmetric cryptographic. In symmetric cryptographic, public-key cryptographic uses complementary pair of keys to divided the process of encryption and decryption. This process is shown in Figure 1.2. This part is discuss about the symmetric-key cryptographic only.[3]. The proposed projects is to create the algor ithms where it is use to convert of information, rearranging the original massage produce output referred as ciphertext Plaintext Plaintext Ciphertext Key Figure 1.1: Symmetric Cryptographic Plaintext Plaintext Ciphertext Encryption Key and Decryption Key Figure 1.2: Public-Key Cryptographic 1.2 Problem Statement At present there are many encryption and decryption, especially in the communication system provided in a variety of application. Encryption and decryption is particularly impacted in the field of military communications and reliable security data to protection for transmitting. This ciphertext is used in the military is to send information such as direction, strategy, secret codes and other information that can not be know by the national foe during the war.[4] Creating this system is the process by which information can not be detect by the national foe. The information can not be recognizing by the national foe because this system is using the process to encrypt data and decrypt data. [4] 1.3 Scopes of Work Based on available software resources, limited time frame and expertise, this research project is narrowed down to the following scope of work: 1. The project is only to design fixed 64-bit input of data block size, 64-bit output of data block size and 56-bit of key size based on an Encryption and Decryption algorithm . 2. The projects is limited to design, to synthesis, to simulate and to verify the design in Altera Quartus II software. Objective The project are to create a system that can protect electronic data (secret information) which Consist of encryption and decryption process and to fully design an encryption and decryption algorithm using VHDL. The objectives of this project are To understand how the Encryption and Decryption process. To fully design an Encryption algorithm and Decryption algorithm using VHDL. Encryption and decryption which support 64-bit input of data block size, 64-bit output of data block size and 56-bit of key size. To make use Quartus II software as a design and synthesis tool. 1.4 Chapter Organization Chapter 1: This chapter starts with an Introduction which highlights the problems under investigation by describing the status of problem conceptually and theoretically. It contains the introduction of the thesis, problem statement and scope of study, objective of the project, and the chapter organization. Chapter 2: This chapter is a Literature Review that compiles the studies done by others based on the title of the project. Under the literature review, this chapter discussed on the features need to be include in designing the system. Chapter 3:. The methodology chapter describes the steps that has been taken while doing the project from the beginning until the end. The main content of the chapter are the flow charts and the description of each step of the process. Chapter 4: This chapter presents the result of the algorithm and discussion observed. The results obtained are presented as a series of figures, tables, with textual description and discussion. The analysis outcome of the research is also discussed in relation to the evidences obtained from project work and theories reported in Literature Review . Chapter 5: The chapter is the Conclusion of the thesis and which signalized the whole project a done CHAPTER 2 LITERATURE REVIEW 2.0. Overview This chapter is to introduce the host range of background information and research for this thesis. Most methods have been widely used to determine how the process of encryption and decryption. Theoretical method is presented using the VHDL. Chooses the VHDL programming for design encryption and decryption because this programming is very direct forward is compare other programming. For example Cadence and C++ programming. Both programming is very complicated. In this chapter, the Literature review of the research is discussed. The main topics discussed in this chapter are shown below: Symmetric cryptography Encryption Decryption Operations of Encryption and Decryption Data Encryption and Decryption VHDL (VHSIC Hardware Description Language) 2.1. Symmetric key cryptography The symmetric key scheme is the conventional method of cryptography. The scheme uses the similar key to encode and decode in information. In a symmetric key algorithm, in the normal case, the communication only uses only one key. For example if Z user Z sends the secret symmetric key to an X user before the start of the communication between them. Part Z and X use the same symmetric key to encryption and decryption the message. Encryption and Decryption are example of symmetric key algorithm. Figure 2.2 shows the symmetric key cryptography. The symmetric key algorithm is faster than an asymmetric key algorithm. There are two classes of symmetric key cryptography as block ciphers and stream ciphers. [6] Plaintext X Plaintext Z Encryption and Decryption Symmetric Key Figure 2.1: The symmetric key cryptography 2.2 Block Cipher Block cipher is a type of symmetric-key decryption and encryption algorithm. The symmetric-key decryption and encryption that is a fixed length block of plaintext data into block ciphertext data. The block size is 64 bit. The block size can be upgrade to 128 bit, 256 bit or 512 bit if the process becomes advanced. Block ciphers operate on large blocks of data. The encryption and decryption of plaintext with a block cipher will result in the same when the same key is used. From the figure 2.3, it can be seen that show the Block Cipher Plaintext Plaintext Block Cipher Encryption and Block Cipher Decryption Symmetric Key Figure 2.2: Block Cipher 2.3 Stream Cipher Stream cipher is a type of symmetric encryption and decryption algorithm. Stream ciphers much faster than any block cipher. Stream ciphers operate on smaller units of plaintext. The encryption and decryption of plaintext with a stream cipher will result in the same when the same key is used. From the figure 2.3, it can be seen that show the Stream Cipher Plaintext Plaintext Stream Cipher Encryption and Stream Cipher Decryption Symmetric Key Figure 2.2: Stream Cipher Advantages of Symmetric Key Cryptography The main advantages of symmetric key (public key) cryptography are improved security and expediency. Other major advantages from the symmetric key (public key) are that they can provide a technique for digital signatures. Verification via secret-key system requires a shared secret and sometimes requires trust of a third party. For example, Kerberos verification system involves a button-secret data center that stores copies of all user secret key. An attack on the database will enable the falsification of the system. Public key verification, on the other hand, prevents of rejection, and each user has a responsibility to protect his private key. [7] 2.3 Disadvantages of Symmetric -Key Cryptography The disadvantage of symmetric cryptography is that it presumes two parties have agreed on a key and been able to exchange that key in a secure manner prior to communication. This is a significant challenge. Symmetric algorithms are usually mixed with public key algorithms to obtain a blend of security and speed. Disadvantage of using symmetric-key cryptography for encryption and decryption is faster. There are popular secret-key encryption and decryption technique that are considerably faster than any at present available symmetric-key encryption and decryption technique. However, public-key cryptography can be used by means of secret-key cryptography to obtain the optimum of both worlds. For encryption, the optimum solution is to join together with public-key and secret-key systems in order to obtain both the security advantages of public-key systems and the velocity advantages of secret-key systems. The public-key system can be make use of to encrypt a secret key which is make use of to encrypt the bulk of a information or message. Public-key cryptography may be vulnerable to impersonation, although, also furthermore if usersà ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢ private keys are not available. A successful assail attack pounce on a certification authority will permit a national foe to impersonate whomever the adversary pick out to by using a public-key certificate from the compromised authority to bind a key of the national foe choice to the name of another user In some plight, public-key cryptography is not obligatory and secret-key cryptography alone is enough. This belonging to environments where secure secret-key assent can take place, for example by users confluence in private. It also belonging environments where a sole authority knows and manages all the keys. Formerly the authority knows everyoneà ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢s keys already there is not much excess for some to be public and others private. And yet, public-key cryptography is normally not obligatory in a single-user environment. Example, if want to keep personal message or information encrypted, can do so with any secret-key encryption algorithm using personal password as the secret key. Furthermore, public-key cryptography is optimum equivalent for an open multi-user environment. Public-key cryptography is not intention to substitute secret-key cryptography, but nevertheless to complementary it, to make it more safety [8] 2.4 Encryption Encryption is a form of cryptography that to change the plaintext into ciphertext. A cipher is a algorithms for the encryption. Encryption is the principle of such security step as digital signatures, digital certificates, and the public key infrastructure. Computer-based encryption method use keys to encrypt and decrypt information. A key is in binary number. The key is one part of the encryption process. It must be used in connection with an encryption algorithm to generate the cipher text. Encryption is the symmetric or asymmetric. Ciphers were repeatedly used directly for Encryption without supplement procedures such as ratification. The extremely used kind of encryption is symmetric Encryption, which is aptly named for the reason that it uses one key for both the encryption and decryption system [9] 2.5 Decryption Decryption is the opposite or moving from the ciphertext back to the plaintext. A cipher is a algorithms for the decryption. The specification operation of a cipher is to manage with both by the algorithm and in each example by a key. Decryption is the symmetric or asymmetric. Ciphers were repeatedly used directly for decryption without supplement procedures such as ratification. The extremely used kind of decryption is symmetric decryption, which is aptly named for the reason that it uses one key for both the encryption and decryption system [10]. 2.6 Operations of Encryption and Decryption An encryption and decryption scheme consists of three Standard algorithms: A Key Generation Algorithm. For a symmetric key, this is often an algorithm that simply picks a random key of a certain length. The symmetric key scheme is the conventional method of cryptography. The scheme uses the similar key to encode and decode in information. An Encryption Algorithm. This takes as input a message (or plaintext) and some kind of key, and outputs a ciphertext. Encryption is to change the plaintext into ciphertext A decryption algorithm. This takes as input a ciphertext and some kind of key, and outputs a message.Decryption is to change the ciphertext back to the plaintext 2.7 Data Encryption and Decryption This system works by encrypting and decrypting groups of only 64 message bits, which is the same as 16 hexadecimal number. To do the encryption and decryption, this system uses symmetric keys where are also apparently 16 hexadecimal number long, or 64 bits long. However, every 8th key bit is ignored in this algorithm, so that the effective key size is 56 bits. But, in any case, 64 bits (16 hexadecimal digits) is the round number upon which Encryption and Decryption is organized. The process is explain in Figure 1.2, it can be seen that the process of encrypt and decrypt, if take the plaintext message is 2872762F771B15E8, and encrypt it with the key 0000000000000001, the ciphertext produced 1234567890987654. If the ciphertext is decrypted with the same secret key 0000000000000001, the result is the original plaintext 2872762F771B15E8. Input data 2872762F771B15E8 Key Encryption Ciphertext 123345678890987654 Key Decryption Key Original input 2872762F771B15E8 Figure 1.2: Simple Block Diagram Process Encryption and Decryption using Feistel Algorithm 2.4 VHDL History (VHSIC Hardware Description Language) In order to complete the design, the VHDL is one of the most important tools used. Device description language VHDL is a great acronym stands for the Very High Speed Integrated Circuit Hardware Description language. It was originally developed on the orders of the U.S Department of Defense. They need a more efficient way to document the behavior of the ASIC design service companies were present.[11,12] It was developed as an alternative to the huge, highly complex manuals that were the norm. The idea to simulate such a description was immediately an attractive prospect and logic simulators were developed could take a VHDL description as input. From here synthesis to the hardware level became a focus of study and still is. Current state-of the- art synthesis tools can create hardware for a large subset of the VHDL language and should at least support the synthesizable subset in IEEE1076.6-1999. The syntax of VHDL was derived from Ada, with constructs added to handle the parallelism th at appears in hardware designs. The language is strongly typed and case insensitive. [13,14] The initial version of the language that was presented in the IEEE standard 1076-1987 was somewhat limited and a new version appeared in 1993 in IEEE standard 1079-1993, which improved the consistency of the language. There have been various reviews and updates to the standard of the languages since, but the 1993 version is the most prominent and widely used. Both versions of the language ignored the need for a multi-valued logic type which is where the IEEE standard 1164 comes in.[15] This standard defines a 9-valued logic type called standard logic. This has become the standard type to use for multi-valued logic in VHDL descriptions. The language has been further extended in a series of libraries. One such library is the numeric std library which implements a signed and unsigned type. These types allow for arithmetic to be performed on arbitrarily sized logic vectors. [16] 2.4 VHDL (VHSIC Hardware Description Language) In order to complete the design, the VHDL is one of the most important tools used. Device description language VHDL is a great acronym stands for the Very High Speed Integrated Circuit Hardware Description language. It was originally developed on the orders of the Department of Defense. They need a more efficient way to document the behavior of the ASIC design service companies were present.[ represented 11,12] VHDL (VHSIC Hardware Description Language) was originally adopted by the U.S Department of Defense. The initial version of VHDL, designed to IEEE standard 1076-1987, included a wide range of data types, including numerical (integer and real), logical (bit and boolean), character and time, plus arrays of bit called bit_vector and of character called string. [16] [1] Laura E.Hunter,Brian Barber,Melissa Craft,Norris L.Johnson Jr,Jeffery A Martin,Tony Piltzecker. MCSE. Implementing PKI in a Window Server 2003 Network.Chapter 4.Page 185 [2] Mohan Krishnamurthy, Eric S.Seagren, Raven Alder, Aaron W.Bayles, Josh Burke, Skip Carter Eli Faskha How to Cheat at Securing Linux.page:250 [3] Dr.Everett F.Carter jr,Jeremy Faircloth,Curtis Franklin jr,Larry Loeb, Hack Proofing XML Page:193 [4] The Point Of Encryption By Dr.Colin Walter,Available at http://www.securitydocs.com/pdf/3301/PDF [5] Aram Khalili, Department of Computer Science, University of Maryland. Available at http://www.cs.umd.edu/~waa/414-F01/symmetric.pdf [6] D. Richard Kuhn ,Vincent C. Hu ,W. Timothy Polk, Shu-Jen Chang ,National Institute of Standards and Technology Introduction to Public Key Technology and the Federal PKI Infrastructure [6.5] Contributed by LE Webmaster Kerberos Authentication System Available at http://www.linuxexposed.com/index2.php? option=com_contentdo_pdf [7]. Advantaged of Public-Key Cryptography ,Available at http://users.hack.gr/dij/crypto/overview/publickey.html [8] Disadvantages of Public-Key Cryptography ,Available at http://x5.net/faqs/crypto/q4.html [9] Manuel Mogollon University Of Dallas USA.Cryptography and Security services. Page: 51 [10] Mohan Krishnamurthy, Eric S.Seagren,Raven Alder, Aaron W.Bayles,Josh Burke,Skip Carter Eli Faskha How To Cheat at Securing Linux .page:251 [11]. Copyright  © 1999 by John F. Wakerly Combinational Logic Design Principles,The VHDL Hardware Design Language. Page :1-35. [12] Deepak Jain . Object Oriented Programming Constructs in VHSIC Hardware Description Language, Delhi Institute of Advanced Studies [13] Institute of Electrical and Electronics Engineers, IEEE 1076-1987: IEEE Standard VHDL Language Reference Manual, 1987 [14] Institute of Electrical and Electronics Engineers, IEEE Std 1076.6-1999: IEEE Standard for VHDL Register Transfer Level (RTL) synthesis, 1999. [15] Institute of Electrical and Electronics Engineers, IEEE 1076-1993: IEEE Standard VHDL Language Reference Manual, 1993. [16] E.P.M. van Diggele. Translation of SystemC to Synthesizable VHDL, MSc Thesis, Delft University of Technology.

Death Penalty Essay -- essays research papers

Capital Punishment Capital Punishment: a.k.a. the death penalty. To kill or not to kill. This is an extremely controversial question in today’s society. The number of people who are for it still believe in the saying, â€Å" an eye for an eye, a tooth for a tooth.† These are the people who feel if you intentionally take the life of someone else, then yours should be taken as well. But then there are the other number of people who feel the death penalty should be banned because of its cruel and unjust way of punishment. Should we keep it or not? And if it is kept, how do we determine who should be sentenced to death? An easy way to answer these questions is to totally nullify capital punishment completely. One reason why the death penalty is so controversial is because many feel its cruel ways of punishment are unnecessary, even if the crime is murder, whether it be premeditated or unintentional. They believe there are other ways of condemnation besides execution. In the case of an unintentional death feelings are that the perpetrators should have the right to live, but have to face each day with the fact that they killed someone weighing on their conscience. On the other hand, such as with a voluntary murder, the ideas are somewhat similar. They believe the murderer doesn’t deserve the death penalty. Chances are if a person is insane enough to kill another human being in the first place, they aren’t going to care what happens to them. They 2 realize that their execution, in most cases, is going to be short and painless. This isn’t a just punishment for someone who has inflicted severe pain upon another life. Our court system, after initiating a life sentence without parole, should not offer these killers the comforts they have in jail. They should be treated more or less like animals. In short, let the ones who institute a crime unwillingly live, but do not let the punishment be as severe as it would for a voluntary criminal. There are a vast number of people who believe that increasing the use of the death penalty will abate the crime rate. Not true. While a criminal is in the process of committing a crime, chances are that he is not contemplating what his punishment will be for his actions. More than likely his thoughts are upon getting what he wants, whether it be something tangible, such as money, or something as ... ... use of capital punishment will not affect the crime rate of an area in any such way. The third and possibly the most important reason why capital punishment should be eliminated is because what is stated in the Bible. The sixth commandment specifically says â€Å"Thou shalt not kill.† If someone is executed, our court system is deliberately defying our Lord’s laws. John 8:7 says, â€Å"Let he who is without sin cast the first stone.† This supports the idea that only a man who is not a sinner has the right to eliminate someone from this Earth. Many feel the only person or being who is without sin is God. They also believe that He is the only existence who has the right to take someone’s life, or â€Å"cast the first stone.† Which in turn means we as humans are not entitled to that privilege. 3 The use of capital punishment in today’s society is an incredibly controversial issue which will require a great deal of contemplation to answer the questions: to kill or not to kill? Many feel that the annihilation of this practice will solve a large number of the problems and questions about the death penalty that haunt our society today. How did you find cheater.com? : friend