Catcher In The Rye Essay

A journey is more than a physical movement from one place to another. All journeys no matter how arduous entail setbacks and barriers that must be met. In doing so the traveller experiences a more significant inner journey of self growth. This is evident in the journey from adolescence to adulthood during which setbacks and barriers may entail a loss of innocence. J. D Salinger’s novel the Catcher in the rye explores this concept through various literary techniques. ( thesis) Loss of innocence as a major issue within the concept of a rites of passage is explored by J. D Salinger through the protagonist Holden Caulfield. His journey appears to be one self destructive act after another. This adult world into which Holden is forced into disturbs him profoundly. In his view, the adults who dwell this world, seem to be filled with phoniness, pretence and social compromise. He finds it almost intolerable to communicate with most adults and peers. This is prevalent throughout the book when he constantly brings up the question of what happens to the ducks in winter. The adults’ response to this recurring question is of contemn and expectation to know the answer, therefore never giving him an adequate explanation. This clearly demonstrates how his innocent mind conflicts with this phony adult world, and his response, is to rebel against this whole society. â€Å" quote† Holden expresses his rebellion through his inability to progress in life and his hatred of people. It is really only in children that he sees the true simplicity of honesty- and that is his escape from this adult phony world. Salinger portrays the transition from adolescence to adulthood as a quest for self identity and self discovery. For Holden however, his journey is a bombardment of obstacles in his search for connection with others, thus highlighting the angst of growing up. Holden finally breaks down with the constant disappointments and let downs he encounters. â€Å"quote ans technique† From his fight with Stradlater to Maurice’s exploitation of a prostitute, to Mr Antolini’s behaviour, Holden just cannot handle any more letdowns so his odyssey is one of loneliness and cynicism. An example of this is when Holden abruptly gives Sally an ultimatum to leave their current lives behind and build a future without the promise of stability. Sally’s refusal to this proposal results in Holden lashing out at her hence elucidating Holden’s naivety. And, just like a kid, he thinks that everyone is to blame except for him. The inability to meet setbacks and barriers and accept a loss of innocence within the jouney from adolescence to adulthood will inevitably lead to ones downfall. The deliberate irony is that Holden strives to act as a grown up but constantly acts like a child is seen in his provocation of his peers and his irrational thinking. â€Å"quote † The title of the book, â€Å"Catcher in the Rye,† is more than just a pretty ditty. It is Holden’s dream to be the catcher in the rye, thus save little children from falling off the cliff into adulthood. â€Å"Anyway, I keep picturing all these little kids playing some game in this big field of rye and all. Thousands of little kids, and nobody’s around–nobody big, I mean–except me. And I’m standing on the edge of some crazy cliff. What I have to do, I have to catch everybody if they start to go over the cliff–I mean if they’re running and they don’t look where they’re going. I have to come out from somewhere and catch them. That’s all I’d do all day. I’d just be the catcher in the rye and all. I know it’s crazy, but that’s the only thing I’d really like to be. † Holden is adamant on playing the adult role of protecting children and their innocence that gets lost in the adult phony world. He envisions protecting and shielding children from the evils of society, when he himself is one who is in a state of conflict between adolescence and adulthood. However, it is through the telling of his story that Holden eventually gains control of his disturbed past. His search for self identity and discovery can be seen as a search for tolerance, acceptance and understanding- something that he finally experiences in the final scene with Phoebe riding the carrousel. When he see’s Phoebe on the carrousel, he accepts that he is not a child anymore indicating that he is perhaps more accepting of change. Towards the end, Holden has found some wisdom when he claims to â€Å"sort of miss everyone. † There was some light for him at the end of the tunnel- and that light is hope and acceptance that he doesn’t live in such an evil world that he made out to be. Holden wants desperately to protect this idealistic life but perhaps he realises at the end that it is not possible and that maturity is a means of accepting what life throws at one. How he deals with obstacles along the way conveys Holden’s journey from adolescence into adulthood.

Simple Des

William Stallings Copyright 2006 Supplement to Cryptography and Network Security, Fourth Edition Prentice Hall 2006 ISBN: 0-13-187316-4 http://williamstallings. com/Crypto/Crypto4e. html 8/5/05 Simplified DES, developed by Professor Edward Schaefer of Santa Clara University [SCHA96], is an educational rather than a secure encryption algorithm. It has similar properties and structure to DES with much smaller parameters. The reader might find it useful to work through an example by and while following the discussion in this Appendix. C. 1 Overview Figure C. 1 illustrates the overall structure of the simplified DES, which we will refer to as SDES. The S-DES encryption algorithm takes an 8-bit block of plaintext (example: 10111101) and a 10-bit key as input and produces an 8-bit block of ciphertext as output. The S-DES decryption algorithm takes an 8-bit block of ciphertext and the same 10-bit key used to produce that ciphertext as input and produces the original 8-bit block of plaintext .The encryption algorithm involves five functions: an initial permutation (IP); a complex function labeled fK, which involves both permutation and substitution operations and depends on a key input; a simple permutation function that switches (SW) the two halves of the data; the function fK again; and finally a permutation function that is the inverse of the initial permutation (IP–1). As was mentioned in Chapter 2, the use of multiple stages of permutation and substitution results in a more complex algorithm, which increases the difficulty of cryptanalysis.The function fK takes as input not only the data passing through the encryption algorithm, but also an 8-bit key. The algorithm could have been designed to work with a 16-bit key, consisting of two 8-bit subkeys, one used for each occurrence of fK. Alternatively, a single 8-bit key could have been used, with the same key used twice in the algorithm. A compromise is to use a 10-bit key from which two 8-bit subkeys are gener ated, as depicted in Figure C. 1. In this case, the key is first subjected to a permutation (P10). Then a shift operation is performed.The output of the shift operation then passes through a permutation function that produces an 8-bit output (P8) for the first subkey (K1 ). The output of the shift operation also feeds into another shift and another instance of P8 to produce the second subkey (K 2 ). We can concisely express the encryption algorithm as a composition1 of functions: which can also be written as: IP-1 o fK2 o SW o fK1 o IP ((( ciphertext = IP-1 fK 2 SW fK1 (IP(plaintext )) where ( K1 = P8 Shift (P10(key )) ! ( ( ))) ) K2 = P8 Shift Shift( P10( key)) )) Decryption is also shown in Figure C. and is essentially the reverse of encryption: ((( plaintext = IP-1 fK1 SW fK 2 (IP(ciphertext )) 1 ))) Definition:! f f and g are two functions, then the function F with the equation y = F(x) = I g[f(x)] is called the composition of f and g and is denoted as F = g o f . C-2 8/5/05 We now examine the elements of S-DES in more detail. C. 2 S-DES Key Generation S-DES depends on the use of a 10-bit key shared between sender and receiver. From this key, two 8-bit subkeys are produced for use in particular stages of the encryption and decryption algorithm. Figure C. 2 depicts the stages followed to produce the subkeys.First, permute the key in the following fashion. Let the 10-bit key be designated as (k1 , k2 , k3 , k4 , k5 , k6 , k7 , k8 , k9 , k10). Then the permutation P10 is defined as: P10(k1 , k2 , k3 , k4 , k5 , k6 , k7 , k8 , k9 , k10) = (k3 , k5 , k2 , k7 , k4 , k10, k1 , k9 , k8 , k6 ) P10 can be concisely defined by the display: 3 5 2 7 P10 4 10 1 9 8 6 This table is read from left to right; each position in the table gives the identity of the input bit that produces the output bit in that position. So the first output bit is bit 3 of the input; the second output bit is bit 5 of the input, and so on.For example, the key (1010000010) is permuted to (1000001 100). Next, perform a circular left shift (LS-1), or rotation, separately on the first five bits and the second five bits. In our example, the result is (00001 11000). Next we apply P8, which picks out and permutes 8 of the 10 bits according to the following rule: P8 6 3 7 4 8 5 10 9 The result is subkey 1 (K1 ). In our example, this yields (10100100) We then go back to the pair of 5-bit strings produced by the two LS-1 functions and perform a circular left shift of 2 bit positions on each string. In our example, the value (00001 11000) becomes (00100 00011).Finally, P8 is applied again to produce K2 . In our example, the result is (01000011). C. 3 S-DES Encryption Figure C. 3 shows the S-DES encryption algorithm in greater detail. As was mentioned, encryption involves the sequential application of five functions. We examine each of these. Initial and Final Permutations The input to the algorithm is an 8-bit block of plaintext, which we first permute using the IP function: IP 2 6 3 1 4 8 5 7 This retains all 8 bits of the plaintext but mixes them up. At the end of the algorithm, the inverse permutation is used: C-3 8/5/05 1 3 IP–1 57 2 8 6 It is easy to show by example that the second permutation is indeed the reverse of the first; that is, IP–1(IP(X)) = X. The Function fK The most complex component of S-DES is the function fK, which consists of a combination of permutation and substitution functions.The functions can be expressed as follows. Let L and R be the leftmost 4 bits and rightmost 4 bits of the 8-bit input to fK, and let F be a mapping (not necessarily one to one) from 4-bit strings to 4-bit strings. Then we let fK(L, R) = (L ! F(R, SK), R) where SK is a subkey and ! s the bit-by-bit exclusive-OR function. For example, suppose the output of the IP stage in Figure C. 3 is (10111101) and F(1101, SK) = (1110) for some key SK. Then fK(10111101) = (01011101) because (1011) ! (1110) = (0101). We now describe the mapping F. The input is a 4-bi t number (n 1 n2 n3 n4 ). The first operation is an expansion/permutation operation: 4 1 2 E/P 32 3 4 1 For what follows, it is clearer to depict the result in this fashion: n4 n2 n1 n3 n2 n4 n3 n1 The 8-bit subkey K1 = (k11, k12, k13, k14, k15, k16, k17, k18) is added to this value using exclusiveOR: n4 ! 11 n2 ! k15 n1 ! k12 n3 ! k16 n2 ! k13 n4 ! k17 n3 ! k14 n1 ! k18 p0,1 p1,1 p0,2 p1,2 p0,3 p1,3 Let us rename these 8 bits: p0,0 p1,0 The first 4 bits (first row of the preceding matrix) are fed into the S-box S0 to produce a 2bit output, and the remaining 4 bits (second row) are fed into S1 to produce another 2-bit output. These two boxes are defined as follows: C-4 8/5/05 0 S0 = 1 2 3 0 â€Å"1 $3 $0 $3 # 1 0 2 2 1 2 3 1 1 3 3 2% 0†² 3†² 2†² ; 0 S1 = 1 2 3 0 â€Å"0 $2 $3 $2 # 1 1 0 0 1 23 2 3% 1 3†² 1 0†² 0 3†² & The S-boxes operate as follows.The first and fourth input bits are treated as a 2-bit number that specify a row of the S-box, and the s econd and third input bits specify a column of the Sbox. The entry in that row and column, in base 2, is the 2-bit output. For example, if (p0,0p0,3) = ! (00) and (p0,1p0,2) = (10), then the output is from row 0, column 2 of S0, which is 3, or (11) in binary. Similarly, (p1,0p1,3) and (p1,1p1,2) are used to index into a row and column of S1 to produce an additional 2 bits. Next, the 4 bits produced by S0 and S1 undergo a further permutation as follows: P4 2 4 3 1 The output of P4 is the output of the function F.The Switch Function The function fK only alters the leftmost 4 bits of the input. The switch function (SW) interchanges the left and right 4 bits so that the second instance of f K operates on a different 4 bits. In this second instance, the E/P, S0, S1, and P4 functions are the same. The key input is K2 . C. 4 Analysis of Simplified DES A brute-force attack on simplified DES is certainly feasible. With a 10-bit key, there are only 2 10 = 1024 possibilities. Given a ciphertex t, an attacker can try each possibility and analyze the result to determine if it is reasonable plaintext. What about cryptanalysis?Let us consider a known plaintext attack in which a single plaintext (p1 , p2 , p3 , p4 , p5 , p6 , p7 , p8 ) and its ciphertext output (c1 , c2 , c3 , c4 , c5 , c6 , c7 , c8 ) are known and the key (k1 , k2 , k3 , k4 , k5 , k6 , k7 , k8 , k9 , k10) is unknown. Then each ci is a polynomial function gi of the pj ‘s and kj ‘s. We can therefore express the encryption algorithm as 8 nonlinear equations in 10 unknowns. There are a number of possible solutions, but each of these could be calculated and then analyzed. Each of the permutations and additions in the algorithm is a linear mapping.The nonlinearity comes from the S-boxes. It is useful to write down the equations for these boxes. For clarity, rename (p0,0, p0,1,p0,2, p0,3) = (a, b, c, d) and (p1,0, p1,1,p1,2, p1,3) = (w, x, y, z), and let the 4-bit output be (q, r , s, t) Then the operati on of the S0 is defined by the following equations: q = abcd + ab + ac + b + d r = abcd + abd + ab + ac + ad + a + c + 1 where all additions are modulo 2. Similar equations define S1. Alternating linear maps with these nonlinear maps results in very complex polynomial expressions for the ciphertext bits, making cryptanalysis difficult.To visualize the scale of the problem, note that a polynomial equation in 10 unknowns in binary arithmetic can have 210 possible terms. On average, we might therefore C-5 8/5/05 expect each of the 8 equations to have 29 terms. The interested reader might try to find these equations with a symbolic processor. Either the reader or the software will give up before much progress is made. C. 5 Relationship to DES DES operates on 64-bit blocks of input. The encryption scheme can be defined as: IP-1 o fK16 o SW o fK15 o SW oL o SW o f K1 o IPA 56-bit key is used, from which sixteen 48-bit subkeys are calculated. There is an initial permutation of 64 bits foll owed by a sequence of shifts and permutations of 48 bits. Within the encryption algorithm, instead of F acting on 4 bits (n1 n2 n3 n4 ), it acts on 32 bits (n1 †¦n32). After the initial expansion/permutation, the output of 48 bits can be diagrammed as: n32 n4 †¢ †¢ †¢ n28 n1 n5 n29 n2 n6 †¢ †¢ †¢ n30 n3 n7 n4 n8 n31 n32 n5 n9 †¢ †¢ †¢ n1 This matrix is added (exclusive-OR) to a 48-bit subkey. There are 8 rows, corresponding to 8 S-boxes. Each S-box has 4 rows and 16 columns.The first and last bit of a row of the preceding matrix picks out a row of an S-box, and the middle 4 bits pick out a column. C-6 10-bit key ENCRYPTION DECRYPTION P10 8-bit plaintext 8-bit plaintext Shift IP-1 IP K1 fK P8 K1 fK Shift SW SW K2 fK P8 K2 fK IP–1 IP 8-bit ciphertext 8-bit ciphertext Figure C. 1 Simplified DES Scheme 10-bit key 10 P10 5 5 LS-1 LS-1 5 5 P8 K1 8 LS-2 LS-2 5 5 P8 K2 8 Figure C. 2 Key Generation for Simplified DES 8-bit plaintext 8 IP 4 fK 4 E/P 8 F 8 + 4 4 2 K1 2 S0 S1 P4 4 + 4 SW 4 fK 4 E/P 8 F 8 + 4 4 2 K2 2 S0 S1 P4 4 + 4 IP–1 8 8-bit ciphertext Figure C. 3 Simplified DES Encryption Detail

Understand Your Role

It makes nonsense to admit errors as it prevents harm to others by 3/5 early and immediate actions errors as it prevents harm to others by nearly immediate actions Question 9 Understand working relationships in health and social care Describe your responsibilities to the individuals you support [ ] Assist people with self-medication and implement care plans as prescribed, and to ensure those with a requirement are washed, dressed, fed and ready for daily activities. [ ] Provide in-home support with health issues and daily living tasks such as washing dressing, eating, transport and budgeting. Assist with the delivery of activities to enhance the physical, social, emotional and intellectual development of those in your care. ] Provide companionship and support during daily activities for those who are sick or aged. Work with a team of health professionals, family, friends and careers to implement a programmer of support.Assist those needing support with domestic activities such as eat ing meals and showering Question 10 Explain how a working relationship is different from a personal relationship [ ] A working relationship depends on many factors, including unprofessional- ism, skills and knowledge and a hierarchy of individuals, some with specialist skills needed for specific functions. A personal relationship may find a skilled arson, such as a consultant, being captained by a bricklayer in cricket, where a different set of loyalties exist [ ] A working relationship depends on many factors, including professionalism, lack of skills and knowledge and a hierarchy of individuals, some with specialist skills needed for specific functions.A personal relationship may find a skilled person, such as a consultant, being captained by a bricklayer in cricket, where a different set of loyalties exist [ ] A working relationship depends on many factors, including professionalism, skills and knowledge and a hierarchy of individuals, some tit specialist skills needed for specif ic functions. A personal relationship may find a skilled person, such as a consultant, being captained by a bricklayer in cricket, where a different set of loyalties exist [ ] A working relationship does not depend on many factors, including professionalism, skills and knowledge and a hierarchy of individuals, some with specialist skills needed for specific functions.

Listening Skills Essay Example | Topics and Well Written Essays - 1250 words

Listening Skills - Essay Example From childhood onwards the listening process starts. Parents and the teachers are the major entities which speak to the children during their childhood and adolescence. â€Å"The average college student spends about 14 hours per week in class listening (or perhaps I should say "hearing"--there is a difference!) to lectures† (Listening Skills, 2006). After grown up, we usually listens the complaints and suggestions of our children, friends, and co-workers. Good listening skills, apart from orating skills are essential for a manager to take sound decisions. It is difficult to understand a topic clearly if we read or write about that topic. Along with reading and writing, listening is the third essential segment of learning process. Listening is an active process which has three basic requirements like hearing, understanding and judging. (What does it mean to really listen?, 2009). A person said to be heard something if he was able to reproduce it. For example, we have often witnessed people sleeping at the hall when the politicians like speakers lengthen their speeches. Such sleeping people cannot be said that they heard what the speaker has told. So a mere presence alone may not guarantee proper hearing. Understanding is the second step of listening. Hearing will become meaningless if the audience does not understand anything. For example, suppose, a child of 6 years attending a college level class. Even if the lecturer tries too hard, the child may not understand anything because of his lack of awareness about the topic. In this case we can safely say that even though the child hears the full lecture, he understands nothing and his listening becomes meaningless. Judging is the third part of the listening process. â€Å"After you are sure you understand what the speaker has said, think about whether it makes sense. Do you believe what you have heard? You might think, "How could the stripes to be different for every zebra? But then

Critically analyse the courts' approach to the interpretation of the Essay

Critically analyse the courts' approach to the interpretation of the duty of disclosure contained in s.18 of the Marine Insurance Act 1906 - Essay Example One of the notable ways in which marine insurance differs from other kinds of contracts is in the difference between the way conditions and warranties are treated. While under contract law, the breaching of a contractual condition can lead to a repudiation of contract but a breach of warranty does not allow such repudiation because a warranty is not fundamental to a contract. With a marine insurance contract however, the conditions are reversed and certain implied warranties, such as ensuring that the ship being insured is sea worthy2, will become as capable of enforcement as a contractual condition, with the provision for voiding of the contract in the event of a breach. Where marine insurance is concerned, the contractual principle underlying such contracts is not that of Caveat Emptor (Buyer Beware) as in the usual contracts, rather these contracts are based upon the uberrimae fides which is the requirement of good faith from both sides, as a result of which all information pertaining to potential risks must be disclosed fully and a failure to do so would be construed as concealment of relevant information, which is a valid ground for an insurer to void an insurance contract. The duties of disclosure are embodied in sections 18 and 19 of the Marine Insurance Act of 1906. Section 18 is primarily concerned with the duty of disclosure that is due from the insured while section 19 concerns the duty of disclosure that fall upon an agent who in involved in the process of getting a party insured. Section 20 underlies the â€Å"expectation or belief† of honesty that is implicit in the duty of disclosure placed upon an insured, so that representations are to be made in good faith.3 Since the question of marine insurance generally arises among parties that are in the shipping business, there is an underlying assumption behind the duty of disclosure wherein the

Romance Movies Essay Example | Topics and Well Written Essays - 500 words

Romance Movies - Essay Example Characteristically romance movies usually have a theme of progression of a sensual and mostly sexual relationship that enhances a character growth mostly between the main actor and actress. Sleepless in Seattle is a perfect example. The movie revolves around Sam Baldwin who has just lost his wife to cancer, Sam's son Jonah thinks that his father needs another wife in order to get back on track, Jonah goes ahead and calls a radio station and he convinces his father to go on air too. The call is heard by6 many women on air including a journalist from Baltimore (Annie reed), well the rest is history. Other top rated romance movies include titanic (1997), pretty woman (1990), love story (1970), city of angels (1998) among others. Movies not only romantic movies are a nice mode of passing time as they also reduce incidences of idleness that is a major reason for drug abuse. In Addition, movies are a popular way of relaxing with friends and catching up on good times. They also assist their viewers to be updated on the current dating catchwords. Romance movies are good to watch any time. They provide viewers with an enticing time as they incorporate the themes of love and romance. These movies usually have a great impact on viewers since at the end of the day many adults as well as kids learn a lot from them. Relationship building: romance movies have both a positive and negative impact on viewer's re

The four models of corporate governance as outlined by Letza et al Essay

The four models of corporate governance as outlined by Letza et al - Essay Example Letza et al's journal was based on an extensive survey and critical review of the different theories and concepts that exist in corporate governance. Based on this comprehensive study, they identified four main approaches of perceiving corporate governance. This include: 1. Principal/Agent or Finance Model. 2. The Mypoic Market Model 3. Abuse of Executive Power Model and 4. Stakeholder Model Each of these models of corporate governance provide the basis for the perception of the importance and significance of corporate governance in organisations. Although each of them carry different merits, none of them seem to be universally accepted. This paper examines the four models of corporate governance as outlined by Letza et al (2004). The paper will undertake an analysis of the key features of each of the model. The paper will compare and contrast the approaches for each of the models and assess the future survivability of each of the concepts Corporate Governance Corporate governance re fers to the ways that businesses are ran (Johnson, Scholes and Whittington, 2006). Corporate governance is about how the top level managers charged with stewardship roles in the organisation carry out the task of safeguarding assets and meeting the core vision and mission of the organisation. The development of corporate governance has come with several issues and situations that have had important impacts on the relationship between shareholders and strategic leaders of organisations. Major scandals that rocked the corporate world like the Enron matter played a role in facilitating rules and principles that define the corporate governance terrain today (Clarke, 2005). Important components of businesses played various roles in shaping corporate governance rules and regulations. Short Termism V Sustainability Most businesses are faced with a major dilemma of whether they should acquire short term results or work for the development of the longer term interests of the business. In dra wing the balance between shortermism and sustainability, most businesses are concerned with four key things (Aras and Gowther, 2009 p282). These include: 1. Societal impact: That is the impact of the business on the society. 2. Environmental impact: The impact of the business on the natural environment. 3. Organisational culture: The relationship between organisational and internal stakeholders like employees. 4. Finance: The acquisition of adequate returns commensurate with the risks taken. These four important factors play a major role in determining the terrain and activities of the organisation. The major corporate collapses like Enron were attributed to blatant disregard for some key elements of these four components of businesses (Clarke, 2005). Thus, they all played roles in defining the creation of corporate governance rules and systems. Although there is still evidence of shortermism in corporate organisations, there is still some important roles that corporate governance s tandards and roles play in promoting sustainability in business (Eyatt, 2005). Risk Management One of the roles that corporate governance plays is that it helps in the creation of risk management systems to ensure that the board of directors monitor and control risks in organisations (Fraser and Harvey, 2007). â€Å"Company business models should be explained and the board should be responsible for determining the