ART Essay Example | Topics and Well Written Essays - 500 words - 13

ART - Essay Example The colorful background appears distant; a calm river is running through the background, attracting fowls thereof. The shadowed area under the tree contrasts with the soothing light in far wide open landscape; and the sunlight is blazing to highlight the tawny complexion and masculine contours of the Indian. Ground under the feet of hunter is filled with dried fallen leaves and fertile soil is mostly covered, thus giving a rough texture of the ground of a thick rainforest. This picture executes a coarse texture for trees, grasses and bushes, and the only well outlined object is the man; smooth lines carve his flesh with great details and visible parts of his body have a suave texture. This picture maintains effective organization of the subject matter (the Indian man) with the formal elements such as trees, river and the ground. This organization is achieved by similarity in color scheme of all objects present in the picture, but contrasting the background, from the man and the yellow tree through shades, spatial relation and texture. Just as the man is the center figure of the scenery; he is painted with details in form (such as prominent lines of his body, his apparel`s color and fashion) and he is also highlighted by his fierce skin tone enhanced by beaming sunlight. However the various shades of golden used in skin color, trees and rocks are giving an overall flamboyant demeanor, golden color use stands in union for most objects of the picture, except for blue sky and the river. The red and green rags on body of the Indian man are contrasting with whole picture`s color theme,

Gubernatorial Campainge Research Paper Example | Topics and Well Written Essays - 1250 words

Gubernatorial Campainge - Research Paper Example She is also a responsible editor for J.R.R. Tolkien list of George Allen and Unwin Publishers apart from effectively commissioning both John Howe and Allan Lee to illustrate Tolkien’s work. Her hard work and dedication are evidenced by her role as a publishing director for House working across the Voyager fantasy science fiction list and crime. Jane as a dedicated leader is firmly advocating for the goodwill of Texas. Her ambitions are highly regarded as she looks forward to fully support both cultural and regional values of the citizens to see them prosper. Being a republican she advocates continuing disfranchising most blacks, poor whites and Latinos, especially the burden of the poll tax and white primaries as confederated by other states. This will lead to higher living standards, especially among the Hispanics and Latino population. Jane being a republican will be able to get most of her supporters in Texas away from the east, west coast, south and Midwest. Most of this population is from the suburban communities and rural areas. This includes 60% of married men and 55% of married women. It includes a lesser population practicing gay and lesbianism. On the contrary to this, the democrats live closer to the coast, including 40 % of married men and 45% of married women. Most of its population practice gay and lesbianism, hence they are less religious and younger in age (Texascentre, 2014). In terms of location, the Republican supporters that Jane is counting on are mostly found in the south and the Midwest Texas consisting of a larger population in rural and suburban areas while the democrats are found east and west coasts and in the urban centers. In terms of marriage status, 24% of women will support Jane while 37% will be against her. She, therefore, has a lesser number of votes from women in the population (Quickfacts 2014). In terms of income, a larger population those with higher

Its features and importance Essay Example for Free

Its features and importance Essay Picture Gear Studio, DVgate Plus, Sonic Stage Other Giga Pocket PVR hardware and software with TV tuner card with remote control Support Policy One-year parts and labor warranty; 24-hour weekday toll-free support during warranty period. $19. 95 fee for phone support after 1-year warranty. Where is it available? What is its price? The SONY RS530G is available at any high end computer shop and also in the internet. Ordering this Desktop PC through the internet at eBay. com or PCExpress. com would come out cheaper than buying it here in the Philippines. Its price is $ 1850. 00 which leaves me with a total of $150. 00. The excess money I could use for extra accessories for the computer like other softwares may it be for leisure or education. III. Systems Ruled Out Obviously Workstations, Personal Digital Assistant (PDA), Mainframes, Mini-Computers and Super Computers were out of the question while choosing my preferred computer system. I dont need a very powerful PC that is used for Computer Aided Design (CAD) nor Computer Aided Manufacturing (CAM). I dont need a computer that would serve up to 70 users because most probably the maximum users that will be using my computer would be 3. Definitely minicomputers are out of my list for one thing theyre phased out. I dont need a computer that would serve hundred of users at a time; Im only a student and not a business so mainframes are crossed out of my list too. Besides mainframes are too complicated to handle as it is. Super computers on the other hand are used by businesses for task demanding extreme computing power especially in establishments for science like meteorology and finding out more on enzymes. PDAs are too small plus its not practical for a student like me to buy a PDA just to set my schedule straight in school and take notes. I need a computer that would aid me in my studies just like a Micro computer. Micro computers hold floppy disk drives and CD-ROM drive or even a DVD drive that would help me in storing data need for my classes, reports and papers. Its the most practical thing to get as of now because if I think of leaving within three years for the UK technology improves quickly and by then if ever I buy a laptop it would be phased out and it would be harder to up grade not like a desktop pc. IV. Conclusion I therefore conclude that at this time, as a student, it would be more practical for me to buy a Desktop PC that would help me in school work and at the same time entertain me for my free time. Laptops are doubled the price of a Desktop PC and is harder to upgrade unlike a Desktop PC. Usually Laptops are used by professionals who are on the go and need computers most of the time to make use of their time. References   Charles S Parker, Understanding Computers: Today Tomorrow: 200 edition, Harcourt College Publishers www. villman. com   www. Amazon. com   www. eBay. com Note from taken from class   and gathered data from different stores :   PC Express   Stores in Greenhills Shopping Mall   Stores in Cybermall.

Cognitive Network Security

Cognitive Network Security Introduction: The rapid development of various communication and wireless technologies had led to ultimate spectrum insufficiency. This may cause a great spectrum extinction thereby not allowing new wireless services to be installed. To overcome this great spectrum disaster and to optimally use the underutilized bands, a new technology so called cognitiveradio evolved. This technology scampers the software programs thereby helps cognitive user to look for spectrum holes, pick the best among them, work jointly in coordination with other users and do not disturb the owner of spectrum on arrival[1].The members do stay connected in an ad-hoc manner and there is no guaranteed network architecture. This makes the privacy issues more intricate than in conventional wireless devices. [2]. The medium of transport is free air, any adulteration of data can be done without much being noticed by the sufferer and at the worst case, the data signals are even jammed. Establishing security in these networks is a ri sky task because of its inimitable quality. [4] The innate temperament of it has made it an open play ground for attackers. There are four layers in a cognitive network out of which Physical layer is the lowermost layer and various attacks are feasible here .The main focus is on attacks in these layers since it is the common layer and has same compatibility with all other devices. The rapid development of technology has led to a new attack so called Primary User Emulation Attack wherein the imitation of spiteful user as a primary transmitter occurs to deceive the secondary users and gain access over the white space. Better functioning of the Cognitive network is affected to a great extent if this Primary User Emulation Attack is severe.[3]Earlier methods and the most primitive are cyclostationary and the energy detection ones [11]. The first technique is based on the fact that the signals from primary users are periodic and do have regular cyclostationarity property. The second method involves comparison of energy level of the signal with a preset threshold. [10].These methods are already bypassed owing to the rapid growth of technology. It can be done either by impersonating the primary transmitted signal or high power signal to confuse the energy detector [9]. Thus to avoid the problem of PUEA, we need a trustable method to verify the arrival of primary user .One such method is verification of licensed user by means of biased reaction signalling[6]. The other technique involves LocDef , where we use localization technique by non interactive technique [7]. We can also use Public encryption systems thereby ensuring the trustworthy communication[5]. Primary user has a closely placed helper node which plays the role of a bridge thereby enabling of the verification of the primary user’s signals using cryptographic signatures and authentic link signatures.[8].There are hand off techniques meant for secret communication of sharing session keys between the client and the router [12]. We do add the tag for authentication in a transparent way so as no to interfere with the primary receiver but still maintain authenticity with the cognitive user. We can add this tag in parity bits of the codeword or in the modulation scheme .[13].But to make this signature embedding accurate, error control codes like convolutional codes, turbo codes or alamauti codes can be used. .A convolutional encoder is a linear predetermined-state device with n algebraic function generators and K stage shift register. The binary input data, is shifted as b bits at a time along the registers. Decoding can be done by either sequential decoding, maximum likelihood or feedback decoding[15]. In case of turbo codes, two RSC elementary codes are in a parallel organization. Maximum A Posteriori algorithm is used for decoding it in iterative process[16].In a highly noisy environments single error control codes do not have high coding gain. In order to improve this concatenated codes are preferred.[14] H ence to cope up with the FCC regulations, we proposed a method in which the authentication tag is embedded onto the data signal by the helper node after encoding and the comparative study of which concatenated codes serve the best to reduce the bit error rate has been discussed. II. PROPOSED METHOD: 2.1)HASH ALGORITHM: Procedure: Message is Padded in such a way that the length of message matches to 896 modulo 1024 . In certain cases ,the length may match yet the padding becomes additional. We do add a binary bit 1 followed by binary 0s to make the desired length. Depending upon the actual message size, we may have n number of bits padded where n=1 to 1024.We do assume that the message after padding is an unsigned integer of 128 bits and output of earlier two steps is a 1024 bit integer in order to calculate the length of message. Eight registers each of capacity to hold 64 bits (p, q, r, s, t, u, v, w) are needed to grasp the 512 bit results momentarily .This 512 bit output is carried over as an input to the consecutive stages. For the first stage, the previously stored transitional hash output is taken. On processing the padded message of 1024 bits, we get 64 bit as input per round. So to maintain the security and avoid repetitions, we do use a constant to point to the round number out of 80.After completion of 80 rounds, the final stage result is fed back to the first block until the message gets over. Thus we need (Oi-1) to produce Oi where I is the stage number. 2.2)METHOD OF EMBEDDING: We assume that the primary transmitter and the helper node share almost the same geological location and the helper node has a secret communication with the secondary users there. The primary transmitter on arrival generally transmits a data signal to its intended primary receiver. Since the primary transmitter has the highest priority and in no way it should be interfered we use the helper node to embed this security tag. The primary transmitter encodes the data sequence, modulates and transmits the signal. The data sequence after encoding is modulated and being transmitted by the primary transmitter. The helper node here repeats the signal and the hashed output is being embedded by it .Here the embedding is done in such a way that the tag to data ratio is comparatively low. Encode the data sequence to form N code words and each codeword contains p bits. We get an authentication tag by splitting the hash function output obtained earlier into p bit blocks. The tag thus obtained is su bstituted in the place of first p bits of the total N code words obtained. We do obey the regulations as per FCC since this tag embedding task is solely performed by the helper node. At the receiver end the authentication tag is retrieved and checked for authenticity. This tag verification is being done by the Cognitive Radio user upon reception since we did assume that the key for hash had been exchanged privately earlier. If verification is successful, the task is suspended and secondary user looks for any new white space. BLOCK DIAGRAM: RESULTS AND DISCUSSION: BER VALUES FOR CONVOLUTIONAL CODES: BER VALUES FOR TURBO CONVOLUTIONAL CODES: BER VALUES FOR CONVOLUTIONAL-ALAMOUTI CODES: BER VALUES FOR TURBO-ALAMOUTI CODES: REFERENCES: O. Leà ³n ,Hernà ¡ndez-Serrano, J.,Soriano, M.,. Securingcognitiveradionetworks, International Journal of Communication Systems,23: 633-652. May 2010 Parvin, S.,Han, S.,Tian, B.,Hussain, F.K, Trust-based authentication for secure communication inCognitiveRadioNetworks,International Conference on Embedded and Ubiquitous Computing, Hong Kong; China;,pp. 589-596. December 2010. Zhang, C.,Yu, R.,Zhang, Y., Performance analysis of Primary User Emulation Attack inCognitiveRadionetworks,International Wireless Communications and Mobile Computing Conference,pp.371-376. August 2012. Parvin, S.,Hussain, F.K.,Hussain, O.K.,Han, S.,Tian, B.,Chang, E., Cognitiveradionetworksecurity: A survey ,Journal of Network and Computer Applications, 35: 1691-1708. November 2012. Parvin, S.,Hussain, F.K.,Hussain, O.K, Digital signature-basedauthenticationframework incognitiveradionetworks, International Conference on Advances in Mobile Computing and Multimedia,pp.136-142. December 2012. Kumar, V.,Park, J.M.,Kim, J.,Aziz, A., Physical layerauthenticationusing controlled inter symbol interference, International Symposium on Dynamic Spectrum Access Networks,pp. 286. October 2012. Ruiliang Chen, Jung-Min Park, and Jeffrey H. Reed,Defense against Primary User Emulation Attacks in Cognitive Radio Networks,IEEE transactions on Selected areas in communication,26:25-37. January 2008. Tingting Jiang., Huacheng Zeng., Qiben Yan., Wenjing Lou.,Thomas Hou,Y, On the Limitation of Embedding Cryptographic Signature for Primary Transmitter Authentication, IEEE transactions on Wireless communication letters,1:324-327. August 2012. Chen,R.,Park,J.,Reed,J.H, Defense against primary user emulation attacks in cognitive radio networks, IEEE transactions on Selected Areas in Communications, 26:25–37. 2008. Liu,Y.,Ning,P., Dai,H, Authenticating primary users’ signals in cognitive radio networks via integrated cryptographic radio networks via integrated cryptographic and wireless link signatures,IEEE Symp. on Security and Privacy, pp. 286–301. 2010. Kim,H.,Shin,K.G, In-band spectrum sensing in cognitive radio networks: energy detection or feature detection? ,ACM international conference on Mobile computing and networking, pp.14-25. 2008. He, Y.,Xu, L.,Wu, W., A local joint fast handoff scheme incognitivewireless mesh networks , IEEE transactions on Security and Communication Networks, 7:455-465. February 2014. Xi Tan., Kapil Borle., Wenliang Du., Biao Chen, Cryptographic Link Signatures for Spectrum Usage Authentication in Cognitive Radio, ACM conference on Wireless network security,pp.79-90.2011. Avila, J.,Thenmozhi, K, DWT highlighted concatenated multi band orthogonal frequency division multiplexing (MB-OFDM)-upgraded enactment, International Journal of Engineering and Technology,5:2155-2162. June 2013. Andrew J. Viterbi, Convolutional Codes and ’Their Performance in Communication Systems , IEEE transactions on Communication Technology,19:751-772. October 1971. Claude Berrou., Alain Glavieux ,Near optimum error correcting coding and decoding-turbo codes,IEEE Transactions on communications,44:1261-1271. October 1996 Wang,X.,Wu,Y.,Caron,B, Transmitter identification using embedded pseudo random sequences, IEEE Transactions on Broadcasting,3:244-252. September 2004. Danev,B.,Luecken,H.,Capkun,Z.,Defrawy,K.E,Attacks on physical-layer identification,ACM Conference on Wireless Network Security,pp.89-97. 2010. Proakis,J.G., Salehi,M, Digital Communications.New York, McGraw-Hill, pp. 192, 434, 472-474. 2007. Chen,Z.,Cooklev,T.,Chen,C., Pomalaza-R ´aez,C, Modeling Primary User Emulation Attacks and Defences in Cognitive Radio Networks, International Performance Computing and Communications Conference,pp.208-215. 2009.

Animal Farm: Communism Through The Eyes Of George Orwell Essay examples

Animal Farm: Communism Through The Eyes of George Orwell Throughout history, writers have written about many different subjects based on their personal experiences. George Orwell was the pen name of Eric Blair. He is one of the most famous political satirists of the twentieth century. He was born in Bengal, India in 1903 to an English Civil Servant and died in 1950. He attended Eton from 1917 to 1921, and served with the Indian Imperial Police in Burma from 1922 to 1927 before moving to Europe.Two of his most famous books, Animal Farm, written in 1946, and Nineteen Eighty-Four, written in 1949, were written about the political and social environment surrounding his life. "The driving force behind his two satires is an intense revulsion against totalitarianism, combined with an even stronger revulsion against its defenders among left-wing intellectuals."1 In most of George Orwell ¹s books and essays, there is a strong autobiographical element due to the fact that he spent many years living with Communists in northern Great Britain (a small number of people started to follow Communism in northern Great Britain when it started in Russia). George Orwell ¹s writing was affected greatly by his personal beliefs about Socialism, Communism, Fascism, and Totalitarianism, and by the revolts, wars, and revolutions going on in Europe and Russia at the time of his writings. George Orwell was a Socialist2 himself, and he despised Russian Communism3, and what it stood for. Orwell shows this hatred towards Communist Russia in a letter he wrote to Victor Gollancz saying, "For quite fifteen years I have regarded that regime with plain horror."4 Orwell wrote this letter in 1947, ten years after announcing his dislike of Communism. However, he had thought a great deal about Communism and what he disliked about if for a long time before he announced it to the public. Orwell "did not expect anything good from the Communist"5 and therefore Communism personally did not affect him, but "He was concerned with it (Communism) only because it was a problem for others."6 In Animal Farm, "an animal fable satirizing Communism,"7 Orwell uses farm animals in England to satirize Russian Communism and its leaders. One animal he uses is a pig named Napoleon, whose counterpart in the Russian Revolution is Joseph Stalin. After Napoleon takes charg... ...r, Alfred G. "Marx, Karl." World Book Encyclopedia.1988 ed. Orwell, George. Nineteen Eighty-Four. New York, NY: Harcourt Brace Jovanovich, Inc., 1949 Orwell, George. Animal Farm. New York, NY: Harcourt Brace Jovanovich, Inc., 1946 Stansky, Peter and Abraham, William. Orwell: The Transformation. New York, NY: Alfred A. Knopf, Inc., 1979 Stansky,Peter. On Nineteen Eighty-Four. San Francisco, California: W.H. Freeman and Company, 1983 Wadsworth, Frank W. "Orwell, George" World Book Encyclopedia. 1988 ed. Woodcock, George. The Crystal Spirit a study of George Orwell. Boston, Massachusetts: Little, Brown and Company,1966 Voorhees, Richard J. The Paradox of George Orwell. New York, NY: Purdue Research Foundation,1961 "Stalin, Joseph." World Book Encyclopedia. 1988 ed. "Lenin, V.I." World Book Encyclopedia. 1988 ed.

Diabetes :: essays research papers

Diabetes (diabetes mellitus) Diabetes is a disease characterized by excessive urination. Diabetes mellitus is caused by insufficient insulin production or lack of responsiveness to insulin, resulting in hyperglycemia (high blood glucose levels). There are 2 primary types of diabetes mellitus, type I (insulin-dependent or juvenile-onset), which may be caused by an autoimmune response, and type II (non-insulin-dependent or adult-onset). Diabetes insipidus is typically due to hormonal dysregulation. Diabetes mellitus (DM) is a chronic metabolic disorder caused by an absolute or relative deficiency of insulin, an anabolic hormone. Insulin is produced in the pancreas by the beta cells of the islets of Langerhans. Absence, destruction, or loss of these cells causes an absolute deficiency of insulin, leading to type 1 diabetes (insulin-dependent diabetes mellitus [IDDM]). Most children with diabetes have IDDM and a lifetime dependence on exogenous insulin. Type 2 diabetes (non–insulin-dependent diabetes mellitus [NIDDM]) is a heterogeneous disorder. Patients with NIDDM have insulin resistance, and their beta cells lack the ability to overcome this resistance. Although this form of diabetes previously was uncommon in children, 20% or more of new patients with diabetes in childhood and adolescence now have NIDDM, a change associated with increased rates of obesity.   Ã‚  Ã‚  Ã‚  Ã‚   Insulin is essential to process carbohydrate, fat, and protein. Insulin reduces blood glucose levels by allowing glucose to enter muscle cells and fat cells and by stimulating the conversion of glucose to glycogen as a carbohydrate store. Insulin also inhibits the release of stored glucose from liver glycogen and slows the breakdown of fat to triglycerides, free fatty acids, and ketones. Additionally, insulin slows the breakdown of protein for glucose production. Hyperglycemia results when insulin deficiency leads to uninhibited gluconeogenesis and prevents the use and storage of circulating glucose. The kidneys cannot reabsorb the excess glucose load, causing glycosuria, osmotic diuresis, thirst, and dehydration. Increased fat and protein breakdown leads to ketone production and weight loss. Without insulin, a child with IDDM wastes away and eventually dies from diabetic ketoacidosis. Information on mortality rates is difficult to ascertain without complete national registers of childhood diabetes, although age-specific mortality probably is double that of the general population. Particularly at risk are children aged 1-4 years who may die with DKA at the time of diagnosis. Adolescents also are a high-risk group. Most deaths result from delayed diagnosis or neglected treatment and subsequent cerebral edema during treatment for DKA, although untreated hypoglycemia also causes some deaths.

Bright Light Big City

What not to Do: Paper 2, Question 2 With almost every mistake made in life, there are lessons that can be learned from them. They can be minor changes in a person’s character or they can completely alter the way people live their lives. These decisions can be for the better or for the worst as well. In Jay McInerney’s Bright Lights, Big City, the character of You faces these very dilemmas. He made mistakes in his life that have altered the way he works, his social life, and, most importantly, the way he interacts with his family.It is almost as if he is a completely different person who simply wanted to fit into the in crowd. Throughout the book it is evident that the pretender makes his imagination reality, and he cannot keep up with it. This books entire plot should be a what not to do guide for every adolescent who is tempted by peer pressure, because it is a perfect image of what can happen in such a short amount of time, and how quick a person can forget who they r eally are. In the beginning of the novel, You are quoted, thinking, ‘You are not the kind of guy who would be at a place like this at this time of the morning.But here you are, and you cannot say that the terrain is entirely unfamiliar, although the details are fuzzy. ’ (McInerney, Pg. 1) This quote would be one of the first and most major indicators that the character of You is pretending to be something that he is not. Inside the character of You, he knows that his actions and the people he is hanging around with is not the norm or does not fit who he is on the inside: a person with morals and respect for his family. He is pretending to be a person without morals about taking drugs, his actions toward others, or honesty in order to fit into the ‘In’ crowd.As the story develops, the reader gets to learn about You’s relationships, habits, and other personal details that could give hints to his self-destruction. The reader learns that You had recently been divorced from his model wife. They also learn that he is on the verge of losing his job, and his mother had passed away a year ago. However, in my opinion, the people that You began to associate himself with were the ones who changed his morals. After all the stress he had been under, people like Tad Allagash became a sort of easy way out of his situation.Instead of dealing with his stress in a healthy way, he decided to go out into the New York City night life, where he drank excessively and took various drugs like cocaine, ecstasy, and other pills. He managed to be able to avoid his family throughout his character change which included lying to them when he was forced to talk with them. For example, when You is asked about where his wife, Amanda, is by his brother Michael, he responds, â€Å"She’s shopping. † (McInerney, Pg. 157).However later, after being knocked out by his brother, he tells the truth, â€Å"‘Amanda isn’t shopping,’ you sa y. ‘She left me. ’ â€Å"(McInerney, Pg. 159). This transition from deceit to honesty when he is vulnerable shows that the character and morality of You is still inside of him, it has just been masked by the fabricated life that he had been living for the past year. At the end of the novel, You comes to the realization that the life he is living is not who he truly is on the inside, which is a person with morals and character that is above the pseudo life that is around him. ’I just realized something. ’ (You) ‘What’s that? ’ (Tad) ‘You and Amanda would make a great couple. ’ ‘I supposed that means that you get Odysseus all to yourself. ’ ‘Later, Tad. ’† (McInerney, Pg. 177-178). You realized that Tad is one of the main sources for his self-destruction. His attitude towards life and other people have been reflected on to You. You decided that he did not need to put up with his antics anymore and to simply dismiss Tad from his life.Leaving Tad behind begins You’s change for the better and at the very end of the novel, You strives for a familiar yet basic staple from his childhood: that being bread. He smells it in the city and bribes a man to give him some in exchange for his Ray-Ban sunglasses. â€Å"You get down on your knees and tear open the bag. The smell of warm dough envelops you. The first bite sticks in your throat and you almost gag. You will have to learn everything all over again. † (McInerney, Pg. 182). This final paragraph is the start of a new beginning for You.The symbol of giving up his sunglasses for something simple yet familiar shows that he is willing to move on from the events of his past and better himself for the future. In my opinion, the moral lesson in the novel Bright Lights, Big City is to be yourself and to not let the stress in your life open yourself up to people who may alter your morals. This novel is sort of a not to do b ook that shows how easily a person can be changed when they allow stress to overcome their life. Although it is not a true story, It can be taken as precautionary tale.I do not believe the McInerney wrote this novel in order to scare people and say that if events like these happen in your life, you will end up a coke head. However, I believe he wrote this book to show that when people are at certain points in their life where they don’t know what to do, they will turn to whatever is easiest. Although at the time what is easy may seem to work, over time it will end up tearing them apart further. Bibliography 1. McInerney, Jay. Bright Lights, Big City: A Novel. New York: Vintage Contemporaries, 1984. Print.