Artificial Intelligence Essay

Artificial Intelligence Essay This paper is the introduction to Artificial intelligence (AI). Artificial intelligence is exhibited by artificial entity, a system is generally assumed to be a computer. AI systems are now in routine use in economics, medicine, engineering and the military, as well as being built into many common home computer software applications, traditional strategy games like computer chess and other video games. We tried to explain the brief ideas of AI and its application to various fields. It cleared the concept of computational and conventional categories. It includes various advanced systems such as Neural Network, Fuzzy Systems and Evolutionary computation. AI is used in typical problems such as Pattern recognition, Natural language processing and more. This system is working throughout the world as an artificial brain. Intelligence involves mechanisms, and AI research has discovered how to make computers carry out some of them and not others. If doing a task requires only mechanisms that are well understood today, computer programs can give very impressive performances on these tasks. Such programs should be considered somewhat intelligent. It is related to the similar task of using computers to understand human intelligence. We can learn something about how to make machines solve problems by observing other people or just by observing our own methods. On the other hand, most work in AI involves studying the problems the world presents to intelligence rather than studying people or animals. AI researchers are free to use methods that are not observed in people or that involve much more computing than people can do. We discussed conditions for considering a machine to be intelligent. We argued that if the machine could successfully pretend to be human to a knowledgeable observer then you certainly should consider it intelligent. INTRODUCTION :- Artificial intelligence (AI) :- Artificial intelligence (AI) is defined as intelligence exhibited by an artificial entity. Such a system is generally assumed to be a computer. Although AI has a strong science fiction connotation, it forms a vital branch of computer science, dealing with intelligent behaviour, learning and adaptation in machines. Research in AI is concerned with producing machines to automate tasks requiring intelligent behavior. Examples include control, planning and scheduling, the ability to answer diagnostic and consumer questions, handwriting, speech, and facial recognition. As such, it has become a scientific discipline, focused on providing solutions to real life problems. AI systems are now in routine use in economics, medicine, engineering and the military, as well as being built into many common home computer software applications, traditional strategy games like computer chess and other video games. History :- The intellectual roots of AI, and the concept of intelligent machines, may be found in Greek mythology. Intelligent artifacts appear in literature since then, with real mechanical devices actually demonstrating behaviour with some degree of intelligence. After modern computers became available following World War-II, it has become possible to create programs that perform difficult intellectual tasks. 1950 1960:- The first working AI programs were written in 1951 to run on the Ferranti Mark I machine of the University of Manchester (UK): a draughts-playing program written by Christopher Strachey and a chess-playing program written by Dietrich Prinz. 1960 1970 :- During the 1960s and 1970s Marvin Minsky and Seymour Papert publish Perceptrons, demonstrating limits of simple neural nets and Alain Colmerauer developed the Prolog computer language. Ted Shortliffe demonstrated the power of rule-based systems for knowledge representation and inference in medical diagnosis and therapy in what is sometimes called the first expert system. Hans Moravec developed the first computer-controlled vehicle to autonomously negotiate cluttered obstacle courses. 1980s ONWARDS :- In the 1980s, neural networks became widely used with the back propagation algorithm, first described by Paul John Werbos in 1974. The 1990s marked major achievements in many areas of AI and demonstrations of various applications. Most notably Deep Blue, a chess-playing computer, beat Garry Kasparov in a famous six-game match in 1997. Categories of AI :- AI divides roughly into two schools of thought: Conventional AI. Computational Intelligence (CI). Conventional AI :- Conventional AI mostly involves methods now classified as machine learning, characterized by formalism and statistical analysis. This is also known as symbolic AI, logical AI, neat AI and Good Old Fashioned Artificial Intelligence (GOFAI). Methods include: Expert systems: apply reasoning capabilities to reach a conclusion. An expert system can process large amounts of known information and provide conclusions based on them. Case based reasoning Bayesian networks Behavior based AI: a modular method of building AI systems by hand. Computational Intelligence (CI) :- Computational Intelligence involves iterative development or learning (e.g. parameter tuning e.g. in connectionist systems). Learning is based on empirical data and is associated with non-symbolic AI, scruffy AI and soft computing. Methods include: Neural networks: systems with very strong pattern recognition capabilities. Fuzzy systems: techniques for reasoning under uncertainty, has been widely used in modern industrial and consumer product control systems. Evolutionary computation: applies biologically inspired concepts such as populations, mutation and survival of the fittest to generate increasingly better solutions to the problem. These methods most notably divide into evolutionary algorithms (e.g. genetic algorithms) and swarm intelligence (e.g. ant algorithms). Typical problems to which AI methods are applied :- Pattern recognition Optical character recognition Handwriting recognition Speech recognition Face recognition Natural language processing, Translation and Chatter bots Non-linear control and Robotics Computer vision, Virtual reality and Image processing Game theory and Strategic planning Other fields in which AI methods are implemented :- Automation. Cybernetics. Hybrid intelligent system. Intelligent agent. Intelligent control. Automated reasoning. Data mining. Behavior-based robotics. Cognitive robotics. Developmental robotics. Evolutionary robotics. Chatbot. Knowledge Representation. American Association for Artificial Intelligence (AAAI) :- Founded in 1979, the American Association for Artificial Intelligence (AAAI) is a nonprofit scientific society devoted to advancing the scientific understanding of the mechanisms underlying thought and intelligent behaviour and their embodiment in machines. AAAI also aims to increase public understanding of artificial intelligence, improve the teaching and training of AI practitioners, and provide guidance for research planners and funders concerning the importance and potential of current AI developments and future directions. APPLICATIONS OF AI :- Game Playing :- You can buy machines that can play master level chess for a few hundred dollars. There is some AI in them, but they play well against people mainly through brute force computationlooking at hundreds of thousands of positions. Speech Recognition :- In the 1990s, computer speech recognition reached a practical level for limited purposes. Thus United Airlines has replaced its keyboard tree for flight information by a system using speech recognition of flight numbers and city names. It is quite convenient. On the other hand, while it is possible to instruct some computers using speech, most users have gone back to the keyboard and the mouse as still more convenient. Understanding Natural Language :- Just getting a sequence of words into a computer is not enough. Parsing sentences is not enough either. The computer has to be provided with an understanding of the domain the text is about, and this is presently possible only for very limited domains. Computer Vision :- The world is composed of three-dimensional objects, but the inputs to the human eye and computers TV cameras are two dimensional. Some useful programs can work solely in two dimensions, but full computer vision requires partial three-dimensional information that is not just a set of two-dimensional views. At present there are only limited ways of representing three-dimensional information directly, and they are not as good as what humans evidently use. Expert Systems :- A knowledge engineer interviews experts in a certain domain and tries to embody their knowledge in a computer program for carrying out some task. How well this works depends on whether the intellectual mechanisms required for the task are within the present state of AI. One of the first expert systems was MYCIN in 1974, which diagnosed bacterial infections of the blood and suggested treatments. It did better than medical students or practicing doctors, provided its limitations were observed. Heuristic Classification :- One of the most feasible kinds of expert system given the present knowledge of AI is to put some information in one of a fixed set of categories using several sources of information. An example is advising whether to accept a proposed credit card purchase. Information is available about the owner of the credit card, his record of payment and also about the item he is buying and about the establishment from which he is buying it (e.g., about whether there have been previous credit card frauds at this establishment). Conclusion :- We conclude that if the machine could successfully pretend to be human to a knowledgeable observer then you certainly should consider it intelligent. AI systems are now in routine use in various field such as economics, medicine, engineering and the military, as well as being built into many common home computer software applications, traditional strategy games etc. AI is an exciting and rewarding discipline. AI is branch of computer science that is concerned with the automation of intelligent behavior. The revised definition of AI is AI is the study of mechanisms underlying intelligent behavior through the construction and evaluation of artifacts that attempt to enact those mechanisms. So it is concluded that it work as an artificial human brain which have an unbelievable artificial thinking power. Programs with Common Sense :- John McCarthy, In Mechanization of Thought Processes, Proceedings of the Symposium of the National Physics Laboratory, 1959. Artificial Intelligence, Logic and Formalizing Common Sense :- Richmond Thomason, editor, Philosophical Logic and Artificial Intelligence. Klà ¼ver Academic, 1989. Concepts of Logical AI :- Tom Mitchell. Machine Learning. McGraw-Hill, 1997. Logic and artificial intelligence :- Richmond Thomason. In Edward  N. Zalta, editor, The Stanford Encyclopedia of Philosophy. Fall 2003. http://plato.stanford.edu/archives/fall2003/entries/logic-ai/. LINKS :- http://www.aaai.org/ http://www-formal.stanford.edu/ http://insight.zdnet.co.uk/hardware/emergingtech/ http://www.genetic-programming.com/

A League of Their Own Essay

The film begins with the commencement of the second world war and female baseball players are drafted into the All American Girls Baseball League, in the attempt to save the sport. With the induction of this league, the girls obtained the chance to show how women deserve an equal chance in sports, an opportunity to show their hard work and perseverance, and free themselves from the clutches of lower class life through success in the sport. The value of family was portrayed throughout the film and became a top priority for some of the players. In achieving a spot on a team the girls also had to conform to the rules and requirements that the owners of the league were demanding. To give this league the popularity it needed, the girls needed to work hard to be the leagues top players in every team. They all acquired the chance to go to training camps and try out for teams that would be placed into the league. The amount of work they displayed to get placed on the team showed that they wanted to earn the respect of the country and show that women could do more than just care for kids or be in charge of the kitchen. They worked extremely hard to show that women could play the sport as easily as men could. For example, this hardworking value was best portrayed by Kit, one of the individuals who played for the league. She got her sister to play because that was the only way they would take her and she did not want to stay on a farm for the rest of her life. Her persistent attitude helped her reach her goal and she became one of the top players of her time just like her sister. The family values are expressed greatly throughout the film by all the characters, but particularly by Dotti. Many of the women on the team had spouses in the army or back home. Dotti was the protagonist who was a girl with beauty and love of the sport like no other girl. What was different about her, besides being extremely skillful in the sport and never having a bad game, was that in her mind she was only playing while her husband was in the war. She loved the game, but her husband and family were always more important for her. The conflict between winning and her sister’s loyalty ended with her realizing that being friends with her sister was far more important than winning or playing in a baseball league. The women dealt with external conformity within the league because of the rules and regulations that the owners had placed on apparel and style of play. The women were required to wear a skirt outfit and makeup while they were playing. They were all forced to take etiquette classes and learn how to act like â€Å"ladies†. The women were upset with this because they had joined the league to play the sport they loved not to go out on the field and model for the fans. This movie was used to display that women were not inferior to men and to show how the game of baseball was used as more than publicity. The hard work and perseverance gave women in the united states a sense of hope and desire to succeed in a male dominated world. A League of Their Own Essay In A League of Their Own, a girls’ baseball league was started while the professional male baseball players, along with many other men, were across seas fighting in World War II. This movie takes place in 1943. A group of ladies left their homes to become part of the All-American Girls Baseball League to keep the baseball traditions alive. In this movie, gender roles are crossed. â€Å"After years of perpetrating the image of the docile little women who sat at home caring for her lord and master, American society suddenly found that it needed women who were competent to do hard skilled work during World War II† (Ebert). This was alarming to the nation and threatening to some. During one of the scenes, a radio announcer announces that the league was â€Å"dangerous to society.† She called it â€Å"sexual confusion.† Much of the country began to worry about what type of women the men would have to come back to. Society believes that women should be sensitive and nurturing, not competitive. At this time, women were also running the businesses and factories. Working in factories and playing competitive sports were considered to be the role of the males. Women are to be â€Å"sensitive, nurturing, and open† (Johnsen). By playing sports and working in factories, women began to take over some more masculine traits. This was threatening to the men. They saw this as loosing control. Women play many parts in men’s struggle for control. One part that women play is â€Å"to support the idea that men and women are fundamentally different because this gives men a clear and unambiguous turf – masculinity – on which to pursue control in competition with one another† (Johnsen). This threatened men’s role and their sense of control. This threatened their masculinity. Even though women were now taking over the factories and sports while the men were away, there still were many politics involved. Instead of this new baseball league being looked at as a competitive sport, it was more of a show. One of the scouts in this movie did not want to take one of the most outstanding baseball players because she wasn’t pretty. The scout finds her â€Å"too homely for the league† (Brown). Also, they were forced to wear skirt outfits to play in the dirt. When the women complained about that, the male instructor commented that they should be glad he isn’t going to make them all wear bathing suits to play in. As if the uniforms weren’t discrimination enough, each and every girl had to take classes at a charm and beauty school. Here, they taught these women how to be ladies. They critiqued them in every way. They walked around and inspected each one, ordering for haircuts, eyebrow waxings, etc. When they reached the homely Marla, they were stumped as to what to do. They didn’t see anyone being able to make a lady out of her. One instructor asked the other what she suggested. All the women could reply back was â€Å"a lot of night games.† She said this about one of the best players in the league. Also at the school, the ladies were taught how to sip â€Å"not slurp† tea, cross their legs appropriately, walk with grace, and balance a book on their head to promote a more graceful, feminine posture. As the movie continues, this so called women’s league wasn’t drawing in any profits and was threatened with closing down. This devastated the girls in the league. This league gave them something to speak of, something of their own, a sense of pride rather than just cooking and cleaning. In order to keep the league continuing, the girls had to draw attention and draw a crowd. It started to turn into a circus. The girls had to do splits to make plays more interesting, slid while the guys on the sidelines got a glimpse up their skirts, anything to make it more interesting and less threatening. At first the women were not given the respect they deserved for their hard work. Nobody believed that these housewives could play hard ball. Once the girls proved themselves, the men and the rest of society got threatened and still didn’t watch. Until the sport became a show, it wasn’t approved of. The girls had contests with the game to make it more interesting. One contest was called â€Å"Catch a foul, win a kiss.† This helps to illustrate that â€Å"women are objects to be competed for, possessed, and used† (Johnsen). Once the women began to make a show of the sport, the bleachers filled. Headlines began to read things such as â€Å"Trading oven mitts for baseball mitts!† and â€Å"Diamonds, a Women’s Best Friend.† Women didn’t receive their own league until it was the way the men wanted it. They weren’t to play competitively. It was to be more of a show. â€Å"Women have gained only what men have been willing to grant; they have taken nothing, they have only received† (Beauvoir). This is because men fear competition from women. If they are playing baseball and working in the factories, then what is the male role? â€Å"Every woman who goes into medicine or law robs them of a job† (Beauvoir). The men were threatened to what else the women would begin to do. â€Å"Hollywood threw out its romance scripts and started making movies about strong, independent females and it was discovered that women could actually excel at professional sports† (Ebert). This is a phenomenal movie that shows the power of women. It gets women out of the house and into the work force. It gets them doing just as the men. This was just the start of the women getting out of the house. Once the men came back from war, the women fought to keep their league alive. Many of the women in and outside of the league went on to be doctors and lawyers. Women were breaking out of the house whether the men were ready for it or not. The first girls in the league now have the own spot in the Baseball Hall of Fame. I believe that these women truly deserve this. Works Cited http://www.rottentomatoes.com.review.sn:usr/ns-home/cgi-bin/ad/adq.cgi, Joe Brown, 1992 http://wwwsuntimes.com/ebert/ebert_reviews/1992/07/764762html, Ebert, 1992 Johnson, Allan G. 1997. The Gender Knot: Unraveling Our Patriarchal Legacy. Philadelphia, PA: Temple University Press Beauvoir, Simone de. 1953. The Second Sex. Trans. And ed. H.M. Parshley. New Yourk: Alfred A. Knopf. Friedan, Betty. 1963. The Feninine Mystique. New York: Dell. (20th ann. Ed. Published by W.W. Norton, 1983.) A League of Their Own, 1992.

Love and Friendship in The Two Gentlemen of Verona.

Love and Friendship in The Two Gentlemen of Verona. The Two Gentlemen of Verona is known to be the first play created by William Shakespeare. It was never staged while he was alive. Some critics say that, if compared to later works of the great Englishman, it looks a bit immature, but as in every work of the author, the eternal life questions are asked in the play. The main problems, highlighted in the comedy, are those of friendship, love and fidelity. The conflict of the play lies in the question, which is topical nowadays several centuries afterwards what is more important, love or friendship? In the times of Shakespeare, even though Renaissance had already started its propaganda of the fact that a human being does have a body apart from its immortal soul, the attitude to friendship was more respectful and warm. In the play two best friends, Valentine and Proteus, are faced with the eternal problem a woman between them, whom they both fall in love with. One of them forgets the years of friendly ties and, blinded by passion, betrays their friendship, which nearly kills his friend. So, here comes the main question is there everything fair in love and war? At the end of the play, Proteus, a friend-betrayer, admits that he was wrong and is forgiven by noble Valentine. But in his plays Shakespeare chanted the praises of human nobility and kindness, so he could not possibly direct the plot differently. Nevertheless, it is a good reason to pound on the problem of love and friendship and decide where those limits are, when even the deepest and the closest friendship can be ruined for the sake of love.

Two Biological Explanations of Schizophrenia Essay

Two Biological Explanations of Schizophrenia There are many biological explanations of schizophrenia. In this essay I will concentrate on the genetic explanation and biochemical explanation of the disorder. There are many studies that look in to genetics and the link to schizophrenia. This is dues to an original finding that schizophrenia runs in families and therefore suggests that genes are responsible for the disorder. I study was preformed by Janicak et al 2001; they found that monozygotic twins have a 48% concordance rate. This is considerably less in dizygotic twins where the concordance rate falls to 17%. This would suggest there is a strong case for genetics being involved with†¦show more content†¦Gottesman also supports the genetic link, showing schizophrenia is more common in close biological relatives of a schizophrenic. However genetic explanations cannot account for the patients who have no family history of the disorder. Biochemical factors are used to suggest that schizophrenia is caused by abnormal neurotransmitter activity. The main aspect of this explanation is the Dopamine hypothesis. Schizophrenia has been linked to with high levels of dopamine in the brain. Dopamine is a neurotransmitter associated with attention. Schizophrenics seem to have an increased number of D2 dopamine receptors on receiving neurons. This theory is support by the fact that Phenothiazines bind with D2 receptors and reduce positive symptoms. Another piece of supporting evidence is that Parkinson’s disease drug L-dopa, increase the level of dopamine and causes schizophrenic like symptoms in some people. However excess dopamine can only explain some types of schizophrenia, usually positive rather than negative. Newer antipsychotic also affect levels of other neurotransmitters. This theory can also not explain why some schizophrenics have long periods of remission. 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