Assigment 4 Assignment Example | Topics and Well Written Essays - 500 words - 1

Assigment 4 - Assignment Example Living in a motel room is a constant reminder to these kids that they do not have a proper home. The kids have to face tortures of not having a home and not having enough money. In the documentary, a girl gets sick in the stomach, and his father could not visit her because he did not have the gas money. When these children look at other happy kids going to Disney Land, it has a damaging impact on their socio-emotional development. They would grow up hating society and the system. These children are vulnerable to negative thoughts. They are also constantly reminded of their poor life quality. Fireworks at Disney Land compared to their small space in a cheap motel room. Luxurious food services in part of the city while they have barely enough to survive. Physically, they might be weaker and undernourished compared to other children. One girl in the documentary gets sick, and her father cannot come to take care of her for he does not have money to pay for bus or buy gas. Under such dire circumstances it is highly likely for these children to be angry, depressed, frustrated and sad. These emotions greatly hamper the cognitive abilities. They might also be uninterested in their school and homework because they have many problems to face on daily basis. Moreover, their socio-emotional de velopment is also under the threat from hostile neighborhood. These kids have to spend a lot of time on the streets where there are drug dealers, gangs and thugs. The first solution is to raise the minimum wage. If working parents cannot afford an acceptable lifestyle despite working then there is something wrong with the money system. Second, the necessary facilities like school, food and medicine should be free. This approach is idealistic but possible. Healthcare and education should not be an industry. Companies would open pharmacies and clinics to make money. It is the government’s job to think of the poor people

Time Definition Essay Example for Free

Time Definition Essay The thought Dont leave until tomorrow what you can today holds very important in this fast pacing world where time is a very important factor and I fully agree with the statement. The main reason for me to believe in this statement is a small but very significant word time. Time is a very precious gift bestowed to us by God and it must be used at the best of our ability. Man tends to get torpor at times, which makes him to keep work and other assignments pending. This increases his load of work and would require him more time to complete the task pended. There is another reason that I would like to lay stress on. Let me take a very common example to explain the point. A small hole in a cloth piece should be stitched when noticed in the earlier stage before it becomes a bigger hole when there will be a greater difficulty to thread up the damage. In a lineA stitch in time saves nine . One should never keep work pending and must be completed as early as possible. This would avoid a greater stress that would be taken to complete a pending assignment. Thus, one should never put off till tomorrow what can be done here and now. Besides time and load of work, there is another small factor that makes me agree to the thought-provoking adage. By post-poning things and keeping them to be done on the eleventh hour would make a person tensed. It would make a person feel more anguish and remorse about the pending task. He would not feel comfortable until and unless the task is completed. At times, when work especially an important task assigned is put off till tomorrow keeps getting postponed and never does the tomorrow come. He tends to put off his work and eventually may forget to complete what is assigned. Such carelessness costs a lot and can make a person get fired by an employer or even lose a job. So, why take such a chance. It is better to do work promptly or earlier for the better. Hence I conclude by the statement to never put off till tomorrow what can be done here and now.

On the Edge, with Sight Essay -- Art Paintings Artist Essays

On the Edge, with Sight I have kept for twenty years a tattered and stained copy of a Matt Groenig cartoon entitled â€Å"How to be an Artist in Torment.†The cartoon asks if you were sickly, peculiar, alienated, or picked on as a child and, if so, did that make you feel superior? Another cell catalogs the requisite psychological impediments of the creative personality—rage, confusion, and self- doubt—and describes the proper look to emulate: an â€Å"overall postpunk neobeatnik semidisheveled drab yet hip look.†The cartoon portrays the artist’s studio companions as lice and rats. Finally, it asks if you are thin and exhausted from staying up nights fretting over an idea, or in a related vein, â€Å"Can drugs really be considered art supplies?† What Groenig laughingly and lovingly describes is the romantic stereotype known in France as les peintres maudits, or â€Å"accursed painters.† It’s a syndrome, however, that extends easily to writers, musicians, and performers. Art historian Douglas Hall describes the four key attributes of the doomed creative genius: alienation, poverty, weakness, and brilliance—the latter being essential if one is not to pass into historical obscurity. The twentieth century is littered with such talented and troubled souls: Jim Morrison, Jackson Pollack, Dylan Thomas, Warhol, Judy Garland, and Van Gogh. Yet the uncontested high priest of the syndrome is Amedeo Modigliani. Modigliani was an expatriate Italian painter living in the bohemian quarters of Paris during the decades before and during World War I. Art historian Doris Krystof provides a tantalizing picture of Modigliani’s life in Paris: His few friends and many acquaintances called him â€Å"Modi,† which appears at first to be merely a shortening of his surname, ... ...tion at the Bellagio Hotel in Las Vegas. Marsha Tackett December 7, 2002 References â€Å"Amedeo Modigliani† Olga’s Gallery [On-line]. 1 Nov 2002. Available: http://www.abcgallery.com/M/modigliani/modiglianibio.html â€Å"Amedeo Modigliani† WebMuseum, Paris [On-line]. 5 Nov 2002. Available: http://www.oir.ucf.edu/wm/paint/auth/modigliani Hall, D. (1990). Modigliani. New York:Watson-Guptill Krystof, D. (2000). Amedeo Modigliani: The Poetry of Seeing, Koln, Germany: Taschen. Kruszynski, A. (1998). â€Å"Amedeo Modigliani: Portrait of Paul Guillaume.† In L. Lumpkin (ed.), The Bellagio Gallery of Fine Art: Impressionist and Modern Masters(pp. 91-98). Las Vegas: Mirage Resorts, Incorporated. Lucie-Smith, E. (n.d.). â€Å"Lives of the Great 20th-Centry Artists† (excerpt). The Artchive [On-line] 1 Nov 2002. Available: http://www.artchive.com/artchive/M/modigliani.html

Learning Team Role Identificatiion Paper

Running head: LEARNING TEAM ROLE IDENTIFICATION PAPER Learning team role identification paper Tiffany Burrage, Tami Bereki, John Kuespert, Tim Poninski University of Phoenix Interdisciplinary Capstone course GEN/480 Inga Parker Jul 04, 2010 Learning team role identification paper One of the factors that make Justice Inc such a unique organization is the various skills each member has. Each member has a particular job title based off of his or her educations, experience, as well as his or her skills. Tim Poninski is the consultant of the organization.Tim’s job is to provide recommendations, facilitation, and training on the development, management, and technological aspects of organization quality improvement efforts at all levels. This is done for Justice Inc as well as out organizations that Justice Inc is consulting with. Tim has expertise and specialties in all aspects of the criminal justice field; therefore Tim is responsible for keeping organizations abreast of any and a ll changes in the criminal justice field. John Kuespert is the president of the company.John’s responsibilities are to establish the direction for the development and administration of the organizations quality improvement efforts. John consults with peers throughout the organization on a number of different issues. Maintains and develop an environment of continual improvement in all aspects of the organization. John makes sure that organizations that Justice Inc consults for is satisfied with the services rendered. John also oversees the organizations operations to make sure production efficiency, quality, service, and cost effective management of resources.John is responsible for day to day operation in the organization. Tiffany Burrage is the vice president of the organization. Tiffany’s responsibilities are to oversee all aspects of the organization. This includes but is not limited to improvement efforts, which deals with developing and administrating programs. Ti ffany’s also is responsible for assuring all employees receive training and coaching. Establishing strategic plans, policies and procedures at all levels for Justice Inc, as well as outside organizations. Tiffany makes sure that the improvements meet or exceed the needs of internal and external customers.Tami Bereki is the auditor of the organization. Tami responsibilities are to primarily evaluate financial information and put in order financial reports for internal and external organizations. Tami also maintains record of resources, liabilities; profit and loss, tax liabilities, as well as other financial activities with thin an organization. Analyze organizations operations, improvement, cost, revenues, financial commitments and obligations. Tami also is responsible for projecting future revenues and expenses and provides advice for organizations.

Health Psychology: Stress and Well Being

Health Psychology: Stress and Well Being Shavonia Finley PSY 101: Introduction to Psychology Destiny Champion February 14, 2011 Health Psychology: Stress and Well Being In everyone’s life a little stress must fall. We all have to deal with daily hassles and various personal stressors that effect our emotional and physical health. The manner in which we deal with these stressors can alleviate or reduce stress or it can make things worse. Mind and body issues have bemused philosophers and psychologists since the ancient Greeks; however recently a new subfield in psychology has immerged to investigate the subject. Health psychology focuses on psychological factors and how they relate to wellness and illness. This would include prevention, diagnosis, and treatment of various medical ailments. More specifically, psychoneuroimmunology is a growing field dedicated to examining how psychological factors, the immune system, and the brain work together. For most people life is filled with small hassles that recur on a regular basis. Busy schedules at home and at work coupled with a traffic filled commute before your day even gets going can cause stress. These stressors are known as background stressors and are the most easily dealt with. They are the daily hassles that irritate us, do not require much coping, and are soon forgotten. Other background stressors can be classified as long term, chronic problems. Dissatisfaction with work, a relationship that is not fulfilling, or a culmination of minor stressors can manifest into health problems such as psychological symptoms, backaches, sore throat, or even the flu [ (Feldman, 2009) ]. The opposite of the daily hassle is uplifts. These are those positive little things that make us feel good. Uplifts are usually temporary, but when we experience more uplifts than stressors we experience less psychological symptoms. An example of an uplift might be something like getting a compliment or completing a task. Stressors such as the terrorist attack in 2001 or Hurricane Katrina in 2005 are classified as cataclysmic events. Cataclysmic events are experienced by many people at once and usually do not have potent, lingering effects. Social support is abundant because so many people share the same first-hand account of the event and can understand each other’s feelings. Another major category of stressors is personal stressors. This would be brought on by things that are more personal such as the loss of a job or the death of a loved one. These types of stressors yield an immediate response that tapers over time allowing us to better cope. How we initially react to a stressor shows that there is a direct link between our mental and physical functions. Walter Cannon’s research in biological psychology, early in the 20th century, led him to describe the â€Å"fight or flight† response of the sympathetic nervous system to perceived threats to physical or emotional security (Feldman, 2009). The body reacts with an increase in heart rate and blood pressure, increase in perspiration, hearing and vision become more acute, and the hands and feet become cold due to blood being directed to large muscles in preparation for fight or fleeing. Hans Selye took this a little further and popularized the concept of stress in the 1950’s. His theory, which he called general adaption syndrome, suggests all individuals have the same or similar response to threatening situations. He believed that not only did the sympathetic nervous system respond, but also the adrenal cortex and the pituitary gland. The theory is that enough epinephrine, or adrenaline, is produced to focus the body on immediate self preservation and shut down other functions such as digestion, reproduction, tissue repair, and the immune system. A constant threat or stressor would leave these functions inhibited and cause the individual to be susceptible to illness (Richmond, 1997). This inhibition of bodily functions can also exacerbate an existing illness. There are three stages; alarm and mobilization when the stressor is realized, resistance or the attempt to cope, and if coping was not adequate, exhaustion and the onset of negative consequences. One example of how stress can leave someone vulnerable to illness is clear when we look at the case of an adolescent girl named Tatiana. Tatiana has had to take on parental responsibilities for her little sister for the past several years, giving up all social time with her friends to do so. She has also had knowledge of the financial difficulties her parents have had to deal with recently. To make matters worse, she has had to move from her home, just as she is starting middle school, to a whole new state. Recently she presented with severe abdominal pains from constipation. None of the over-the-counter remedies helped and she was admitted to the hospital. She was diagnosed with a virus that paralyzed her intestines so the doctor gave her antibiotics and a special diet to follow. Unfortunately, her condition continued to decline and the doctors decided her symptoms were psychosomatic, implying her illness was not real. She eventually lost all muscle function in her arms and legs and was confined to a wheelchair. She then was enrolled in a program run by a health psychologist designed to treat psychophysiological disorders. Since her physical ailments were already being treated by a pediatrician they could concentrate on the psychological and emotional difficulties and how they all interacted. After two months in the program, Tatiana is now able to walk on her own and is no longer having digestive difficulties. As she has stated, â€Å"I was very angry with my parents. They never asked me what I wanted. They treat me like a baby, but they want me to do grown-up stuff. I hated them for that† (Wells, 2011). While Selye’s theory has impacted our understanding of stress, it has also been challenged. His theory suggests that no matter what the stressor, the biological reaction will be similar in all individuals. Health psychologists today believe the reaction is also determined by how the individual appraises the situation or stressor. For example, another adolescent in Tatiana’s situation may simply have acted out instead of becoming ill. The situation could have been perceived by another as stressful, but not unusual, therefore the different perception would result in a different outcome. Due to these differences in perspective, there has been an increased focus on psychoneuroimmunology and stress. Psychoneuroimmunology takes a broader approach to stress. It focuses more directly on the outcomes of stress; three main consequences have been identified. First, the physiological results of stress include increased blood pressure, hormonal activity, and an overall decline in the effectiveness of the immune system. Second, stress can cause people to behave in ways that are not productive and even harmful such as drug, alcohol, or nicotine use, poor eating habits, and a decrease in sleep. Third, indirect consequences that can cause a decline in health and the likelihood that medical advice will be ignored if ever sought. One of the biggest illnesses associated with stress is coronary heart disease. You may know someone who is always in competition with others, is easily irritated, or is overly aggressive. We all feel this way sometimes, but there are those who carry the set of personality traits know as the Type-A behavior pattern. Then there are those who fall into Type-B behavior pattern which is more patient, noncompetitive, nonaggressive, and cooperative. These two behavior types are the polar ends of a continuum and most people fall somewhere in the middle. Type-A personalities in males are highly associated with coronary heart disease. Hostility seems to be a key factor since it triggers the production of epinephrine and norepinephrine, increases heart rate, and raises blood pressure. When this response is exaggerated and continuous there is an increased incidence of coronary heart disease (Feldman, 2009). For most of society stress has been recognized as a part of life. Therefore people have devised many ways to control, reduce or tolerate it. These methods are known as coping and are often utilized in multiples. The most common methods of coping with stress are emotion-focused and problem-focused. Emotion-focused coping focuses on people trying to change the way they feel about or perceive a problem; like looking on the bright side. Problem-focused coping strategies include modification of the source of the stress; an example would be learning how to fix your own car to maintain and avoid costly repairs. Common coping methods vary widely in individuals. Most will choose healthy resolutions such as relaxation techniques to slow down the sympathetic nervous system. These include exercise, meditation, prayer, joining a support group, or any other activity that relaxes you such as painting or listening to music. There are also those who will choose unhealthy courses of action. For them alcohol use is the number one choice. Others may choose to use drugs, nicotine, overeat, or starve themselves. Some people choose yet another course of action called learned helplessness. This is when someone is faced with a situation that seems intolerable and they eventually give up. Their environment has ingrained in them that certain situations cannot be controlled or changed regardless if it can or not. The opposite would be the person with a hardy personality. They seem to have the most success with dealing with stress. This personality type has three distinct characteristics: commitment, challenge, and control. They usually throw themselves into whatever they are working on, they believe change is the norm in life rather than stability, and they give the perception that they can influence the events in their lives. Managing stress before it becomes too difficult to control is another aspect of coping. Having a healthy perspective of most situations will allow you to prioritize your life reducing the potential stressors. Also, having a realistic self image and reasonable expectations will allow you to set appropriate goals. The achievement of such goals will result in an uplift rather than a perceived failure. Once stress can be managed there can be a pursuit for happiness. Over the course of a life there will be times that are happier than others or not happy at all. In a study performed by Carol Ryff it was determined that happiness can be measured in six dimensions; prior studies did not include as many dimensions (1989). The dimensions described in her study would be self acceptance, positive relations with others, autonomy, environmental mastery, purpose in life, and personal growth. Her study surveyed 321 men and women of varying ages. Someone scoring high would possess a positive attitude toward themselves including their good and bad qualities. They would also show empathy towards others and understand the give and take of relationships. Autonomy is seen in someone who is independent and able to resist social pressures. Someone who has become an environmental master has a sense of competence in controlling external activities. Believing you have a purpose in life means you have goals and a sense of direction. Finally, having a feeling of continued development and openness to new experiences shows personal growth. Another study used the person-environment fit theory to compare work and family experiences to the person’s values and how they relate to stress and well-being. The idea behind the study was to see if the amount of supplies we value influences well-being when they increase and decrease. The dimensions looked at were autonomy, relationships, security, and segmentation. Person – environment fit theory says that stress occurs when there is a perceived mismatch between the environment and a person’s goals, desires, and values (Edwards & Rothbard, 1999). Cognitive appraisal is directly incorporated into the concept of stress. Basically, person – environment theory predicts well-being when there is a perceived match in environment and values. The opposite, or stress, occurs when there is a mismatch. The onset of stress will cause mental and physical strain and stimulate efforts to cope. There are three reasons why well being should be higher when autonomy supplies and values are both high rather than low. First, high autonomy supplies may consist of high supplies for responsibility and authority, in other words accomplishment and status, which many people value. Second, desiring and attaining high levels of autonomy possibly constitutes a supply for values pertaining to accomplishment and adjustment. Third, autonomy allows for freedom to allocate time and resources to meet life’s high demands. High control in addition to high demands gives people the ability to successfully cope with challenging situations, which leads to satisfaction and growth. The next dimension is relationships or personal connections with other people. People are naturally motivated to establish and maintain relationships. This is true at work and with family members. Relationships play such a dominant role in stress research because they provide social support that facilitates coping with stress and achieving well-being. When a person has a desire for strong connections with others it suggests they have achieved ambitious goals regarding social integration. The third dimension of well being is security, which is defined as â€Å"the belief that membership in a role is stable and likely to continue† (Edwards & Rothbard, 1999). An example would be the feeling of job security or security within a marriage. Security is yet another basic human motive. Finally, the degree of separation or insulation there is between work and family is segmentation. Keeping your family stresses and work stresses separate requires an active effort on the part of the person. Managing boundaries between the two allows the person to inhibit the transfer of stressful experiences between the two. The study of mental and physical well being done by health psychologists and psychoneuroimmunolgists is still relatively new and is opening the door to many new career fields. The opportunities for careers in health psychology in this country are plentiful. Medical settings, especially medical centers, have expanded their employment opportunities for psychologists. In addition to medical centers, health psychologists often work in colleges and universities, medical schools, health maintenance organizations, rehabilitation centers, pain management centers, public health agencies, hospitals, and private consultation/practice offices [ (American Psychological Association: Health Psychology, 2011) ]. In addition to the specific skills that psychologists offer to patients and staff in the medical community, psychologists offer a unique perspective that assists other healthcare professionals make certain that health care is helpful and cost-effective. Health psychologists have focused on how life’s ups and downs can affect our mental and physical health. They have stirred professional and public interest in how biology, the environment, and our behaviors influence health and illness. Their studies have provided us with methods of coping and anaging stress so it is possible to maintain a healthy lifestyle. The more we learn about the relationship between biology, our environment, and behavior the better equipped we will be at preventing, diagnosing, and managing chronic illness. References American Psychological Association: Health Psychology. (2011). Retrieved January 27, 2011, from APA Division 38: http://www. health-psych. org/abouthowtobecome. cfm Edwards, J. R. , & Rothb ard, N. P. (1999). Work and Family Stress and Well-Being: An Examination of Person-Environment Fit in the Work and Family Domains. Organizational Behavior and Human Decision Processes , 77 (No. 2), 85 – 129. Feldman, R. S. (2009). Understanding Psychology (9th ed. ). New York: McGraw-Hill. R. L. Richmond, P. (1997). The Psychcology of â€Å"Stress Management†. Retrieved January 2011, from A guide to psychology and its practice: http://www. guidetopsychology. com/stress. htm Ryff, C. D. (1989). Happiness is Everything, or Is It? Explorations on the Meaning of Psychological Well-Being. Journal of Personality and Social Psychology , 57 (No. 6), 1069 – 1081. Wells, T. (2011, February 5). (S. Finley, Interviewer)

Lockheed U-2 Spy Plane

Lockheed U-2 Spy Plane In the years immediately after World War II the US military relied on a variety of converted bombers and similar aircraft to collect strategic reconnaissance. With the rise of the Cold War, it was recognized that these aircraft were extremely vulnerable to Soviet air defense assets and as a result would be of limited use in determining Warsaw Pact intentions. As a result, it was determined that an aircraft capable of flying at 70,000 feet was needed as existing Soviet fighters and surface-to-air missiles were incapable to reaching that altitude. Proceeding under the codename Aquatone, the US Air Force issued contracts to Bell Aircraft, Fairchild, and Martin Aircraft to design a new reconnaissance aircraft capable of meeting their requirements. Learning of this, Lockheed turned to star engineer Clarence Kelly Johnson and asked his team to create a design of their own. Working in their own unit, known as the Skunk Works, Johnsons team produced a design known as the CL-282. This essentially married the fuselage of an earlier design, the F-104 Starfighter, with a large set of sailplane-like wings. Presenting the CL-282 to the USAF, Johnsons design was rejected. Despite this initial failure, the design soon received a reprieve from President Dwight D. Eisenhowers Technological Capabilities Panel. Overseen by James Killian of the Massachusetts Institute of Technology and including Edwin Land from Polaroid, this committee was tasked with exploring new intelligence weapons to protect the US from attack. While they initially concluded that satellites were the ideal approach for gathering intelligence, the necessary technology was still several years away. As a result, they decided that new spy plane was needed for the near future. Enlisting the aid of Robert Amory from the Central Intelligence Agency, they visited Lockheed to discuss the design of such an aircraft. Upon meeting with Johnson they were told that such design already existed and had been rejected by the USAF. Shown the CL-282, the group was impressed and recommended to CIA head Allen Dulles that the agency should fund the aircraft. After consulting with Eisenhower, the project moved forward and Lockheed was issued a $22.5 million contract for the aircraft. Design of the U-2 As the project moved forward, the design was re-designated U-2 with the U standing for the deliberately vague utility. Powered by the Pratt Whitney J57 turbojet engine, the U-2 was designed to achieve high altitude flight with a long range. As a result, the airframe was created to be extremely light. This, along with its glider-like characteristics, makes the U-2 a difficult aircraft to fly and one with a high stall speed relative to its maximum speed. Due these issues, the U-2 is difficult to land and requires chase car with another U-2 pilot to help talk the aircraft down. In effort to save weight, Johnson originally designed the U-2 to take off from a dolly and land on a skid. This approach was later dropped in favor of landing gear in a bicycle configuration with wheels located behind the cockpit and engine. To maintain balance during takeoff, auxiliary wheels known as pogos are installed under each wing. These drop away as the aircraft leaves the runway. Due to the U-2s operational altitude, pilots wear the equivalent of a spacesuit to maintain proper oxygen and pressure levels. Early U-2s carried a variety of sensors in the nose as well as cameras in a bay aft of the cockpit. U-2: Operation History The U-2 first flew on August 1, 1955 with Lockheed test pilot Tony LeVier at the controls. Testing continued and by spring 1956 the aircraft was ready for service. Reserving authorization for overflights of the Soviet Union, Eisenhower worked to reach an agreement with Nikita Khrushchev regarding aerial inspections. When this failed, he authorized the first U-2 missions that summer. Largely flying from Adana Air Base (renamed Incirlik AB on 28 February 1958) in Turkey, U-2s flown by CIA pilots entered Soviet airspace and collected invaluable intelligence. Though Soviet radar was able to track the overflights, neither their interceptors nor missiles could reach the U-2 at 70,000 ft. The success of the U-2 led the CIA and US military to press the White House for additional missions. Though Khrushchev protested the flights, he was unable to prove that the aircraft were American. Proceeding in complete secrecy, flights continued from Incirlik and forward bases in Pakistan for the next four years. On May 1, 1960, the U-2 was thrust into the public spotlight when one flown by Francis Gary Powers was shot down over Sverdlovsk by a surface-to-air missile. Captured, Powers became the center of the resulting U-2 Incident which embarrassed Eisenhower and effectively ended a summit meeting in Paris. The incident led to an acceleration of spy satellite technology. Remaining a key strategic asset, U-2 overflights of Cuba in 1962 provided the photographic evidence that precipitated the Cuban Missile Crisis. During the crisis, a U-2 flown by Major Rudolf Anderson, Jr. was shot down by Cuban air defenses. As surface-to-air missile technology improved, efforts were made to improve the aircraft and reduce its radar cross-section. This proved unsuccessful and work began on a new aircraft for conducting overflights of the Soviet Union. In the early 1960s, engineers also worked to develop aircraft carrier-capable variants (U-2G) to extend its range and flexibility. During the Vietnam War, U-2s were used for high-altitude reconnaissance missions over North Vietnam and flew from bases in South Vietnam and Thailand. In 1967, the aircraft was dramatically improved with the introduction of the U-2R. Approximately 40% larger than the original, the U-2R featured underwing pods and an improved range. This was joined in 1981 by a tactical reconnaissance version designated TR-1A. The introduction of this model re-started production of the aircraft to meet the USAFs needs. In the early 1990s, the U-2R fleet was upgraded to the U-2S standard which included improved engines. The U-2 has also seen service in a non-military role with NASA as the ER-2 research aircraft. Despite its advanced age, the U-2 remains in service due to its ability to perform direct flights to reconnaissance targets on short notice. Though there were efforts to retire the aircraft in 2006, it avoided this fate due to the lack of an aircraft with similar capabilities. In 2009, the USAF announced that it intended to retain the U-2 through 2014 while working to develop the unmanned RQ-4 Global Hawk as a replacement. Lockheed U-2S General Specifications Length:  63 ft.Wingspan:  103 ft.Height:  16 ft.Wing Area:  1,000 sq. ft.Empty Weight:  14,300 lbs.Loaded Weight:  40,000 lbs.Crew:  1 Lockheed U-2S Performance Specifications Power Plant:  1 Ãâ€" General Electric F118-101 turbofanRange:  6,405 milesMax Speed:  500 mphCeiling:  70,000 ft. Selected Sources FAS: U-2The CIA the U-2 Program: 1954-1974

Ritalin as treatment for ADHD essays

Ritalin as treatment for ADHD essays Imagine your child is entering school for the very first time. Imagine also your child has been diagnosed with the same disorder that over 2.5 million school-age children in the United States have been diagnosed with in the past decade, Attention Deficit Hyperactivity Disorder (ADHD) a disorder that affects at least one child in every classroom in the U.S. the disorder is marked by hyperactivity, inattentiveness and, impulsiveness. Now you must make the tough decision to medicate your child as a treatment for his disorder with the all to popular medication prescribed for this disorder called Ritalin. Though you are aware of the many controversies surrounding your decision, you are confident this is the best decision for your child because it has been scientifically proven that Ritalin is the best treatment for ADHD. As a prescription medication, Ritalin an amphetamine has been around for a long time. It was first invented around 1930. Back then, doctors used Ritalin to treat adults for narcolepsy, a sleep disorder. In 1937, scientists discovered that it could also be used to treat children with severely disruptive behavior and hyperactivity problems. Since the early 1960s, Ritalin has been used to treat ADD (Attention Deficit Disorder) and ADHD. It has been the most commonly prescribed drug for these disorders since the early 1980s (Beal 20). Although many professionals oppose medicating children with Ritalin, for most children with ADHD/ADD, medication is an integral part of treatment. Medication is not used to control behavior. Medication is used to improve the symptoms of ADHD so that the individual can function more effectively (CHADD). Some research studies suggest that stimulant drugs such as Ritalin increase the concentration of dopamine within the brain , and, in doing so, enable the child to gain control over his behavior, to pay attention to the most important stimulus entering his brain, to c...

The Difference Between Phonics and Phonetics

The Difference Between Phonics and Phonetics The Difference Between Phonics and Phonetics The Difference Between Phonics and Phonetics By Maeve Maddox Reader Ali Abuzar wonders about the difference between phonics and phonetics. In popular usage the words are often used interchangeably, although phonics [fÃ… nÄ ­ks] is the term usually employed when speaking of a method of beginning reading instruction. In this use, phonics is regarded as a simplified form of phonetics [fÉ™-nÄ•tÄ ­ks], which is the scientific study of speech sounds. NOTE: Although phonics and phonetics end with s, they take singular verbs: Phonics is the most effective way to teach reading. Here are definitions from the OED: phonics The branch of linguistics concerned with spoken sounds; phonetics The correlations between sound and symbol in an alphabetic writing system; the phonic method of teaching reading. phonetics The study and classification of speech sounds, esp. with regard to the physical aspects of their production; the branch of linguistics that deals with this. Using phonics to teach reading involves teaching the beginner the sounds associated with the letters of the alphabet before introducing written words. The beginner learns to analyze words by comparing the letters in them to the sounds they represent. NOTE: Early practice is confined to words in which the letter/sound correspondence is regular. Once the beginner has established the habit of expecting letters to represent spoken sounds, words containing one or more non-phonetic elements are introduced. Another term, phonology [fÉ™-nÃ… lÉ™-jÄ“, fÃ… -], refers to the study of speech sounds. Phonology encompasses rules governing pronunciation in a given language. phonology n. Originally: the science of speech sounds and pronunciation, esp. as they occur in a particular language. Now: the branch of linguistics concerned with the study of phonological relationships within a language or between different languages; the system of contrastive and phonotactic* relations among the speech sounds of a particular language. OED *phonotactics The branch of linguistics concerned with the rules governing the possible phoneme** sequences in a language or languages; these rules as they occur in a particular language. **phoneme A unit of sound in a language that cannot be analysed into smaller linear units and that can distinguish one word from another (e.g. /p/ and /b/ in English pat, bat). English Spelling Not Total Chaos Learn To Spell By Phonograms, not Letters Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Vocabulary category, check our popular posts, or choose a related post below:20 Types and Forms of HumorConfused Words #3: Lose, Loose, LossAffect vs. Effect

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

Research - Term Paper Example However, during the party, where Madame Loisel has an amazing time, she loses the necklace. In a haste to replace the necklace without Forestier knowing, Loisel and her husband spend all of their money, as well as money they do not have, to buy this new necklace. The debt puts the Loisels into poverty. The irony of this story is seen at the end, when Loisel meets up with Forestier after many years, only to find that the necklace that was lost was hardly worth a percentage of the one used as a replacement. The themes found in â€Å"The Necklace† are irony and greed. Madame Loisel longed for a life of luxury. She refused to go out because she felt that she did not meet any of the standards of the â€Å"rich women,† as was stated in the story. She lusted after what others had, and cared not for all that she had in her average life. It was Madame Loisel’s greed that caused the ironic outcome of the story. Had she not been so set on being charming and living, if only briefly, the life that she had longed for, she would have not lost the cheap necklace and gone on to replace it with a much more exquisite piece of jewelry. Her greed brought in the irony of her and her husband having to live worse than ever for ten years. Her greed blinded her of just how precious life was despite all of the material possessions. It was because of this that enabled her to witness how others below her were forced to live. From the first paragraph of the story, â€Å"The girl was one of those pretty and charming young creatures who sometimes are born, as if by a slip of fate, into a family of clerks. She had no dowry, no expectations, no way of being known, understood, loved, married by any rich and distinguished man; so she let herself be married to a little clerk of the Ministry of Public Instruction,† it was clear that Madame Loisel was a self-spoiled girl. This is shown in the way that she automatically links being pretty to having a perfect, rich

Owning a Computer for Writer Is Not Necessarily, Equal Right to an Essay

Owning a Computer for Writer Is Not Necessarily, Equal Right to an Equal Share of Resources - Essay Example The articles are on the case against helping the poor. The article argues that everyone on the earth has an equal right to an equal share of resources. In the current situation, two-thirds of the nation is poor and the other third comparatively rich with the United States being the richest of all. The article argues on the plans that are made by those countries that are rich and those that are not rich. This brings the difference between the countries. The third article is about sustainability. In the recent situation, the term sustainability has been wrongly used to refer to practices that are reputed to be more environmentally important than others. The term is indispensable and should be used as the cornerstone for all the planning that is used in a country. The axioms of sustainability are defined in the article. The first axiom is that a society that remains to use acute resources untenably will collapse. The second axiom is population growth or growth in the rates of consumption of resources cannot be sustained. The third axiom is that to be sustainable, the use of renewable sources must be preceded at the rate less than or equal to replenishment. The fourth axiom is that the use of nonrenewable energy sources and the rate at which they decline must be greater or equal to the rate of depletion. The last axiom brought about is that sustainability requires that the substance that is introduced into the environment from human ac tivities be reduced and compact harmless to biosphere roles. The issue that all three essays are concerned with is on resources. In the first essay, the argument is on the reasons that make the author not being able to buy a computer.  

Romanticism Essay Example | Topics and Well Written Essays - 500 words - 1

Romanticism - Essay Example I would agree with the statement that music is emotional. It could also be said that music is the most emotional of all arts. However I do not agree that music finds its ultimate style in Romanticism. Many composers, before and after the Romanticism movement, can evoke emotion as well. The Romantic style opened the doors for a broader spectrum of emotional music. It broke the standards of music of the time, allowing composers and musicians to express themselves openly. I do respect the Romantic style for that. While I have my favorites, I would not place one music style over another one. This includes the Romanticism era as well. Romanticism allowed the composer or artist the freedom to express their emotions. Instead of trying to please the audience, the artist wrote and played music for themselves. Lee Marshall explains: The only appropriate judge of the work becomes the artists himself because only the artist knows whether the work is true and the audience can only abide by Romanticism’s ‘first law [which] is the will of the creator.’ (33) The artist pours themselves into a piece of work, which in turn allows the audience to feel the artist’s emotion more clearly. An example would be Shubert’s â€Å"Death and a Maiden†. This piece of music relates how Shubert feels about his impending death.

Logistics and Supply Chain Management Case Study

Logistics and Supply Chain Management - Case Study Example Examples like Wal-Mart and Benetton are in front of us where logistics transformed the form of core competence which is strategically positioned for bringing market success for the organization (Drew & Smith 1995). This, on one hand, gives a competitive advantage to one organization, on the other hand, it is achieved at the cost of exploiting the other. Such exploitation in market terms can be labeled as 'weapon' that once used against the competitor provides benefit at the cost of bringing loss to the competitor. This can be illustrated by the fact that an organization can increase or decrease the goods supply to the market or can purchase the services of major supply chain companies irrespective of the fact he uses them or not, but to choke other companies particularly competitors from getting supply chain services for their goods supply. Unless the competitor is efficient enough to detect what is going on behind the curtain, he is unable to rectify the cold war being played agains t him by his rivals. However, Drew & Smith (1995, pp. 24-33) points out that excessive exploitation can produce dangerous results if the organization adopts a rigid behavior. Similarly, this 'explosive weapon' can result in fatal blind spots if used in a single direction without considering other factors. For instance, supply chain integration once stops at the factory door may annoy large organizations to exploit more but since logistic firms are aimed to improve their performances, such exploitation will probably not work. Traditional supply chain delivers limited value to companies for which there is a political competition going on among competitors. In contemporary fast-paced supply chains, managers or CEOs lack insight into the ripple effects of their decision (Boyson et al 2004, p. 99). Logistical challenges are confronted by the firms who not only assume a static environment but look at each problem individually. For instance, a company when switches from long-term contracts to short-term buys it suffers temporarily for the decision will influence the logistic options available to the organization including short-term variability, the price of the product and supplies.   With the lengthening of supply chains, logistics executives are increasingly taking the onus on their shoulders for anticipating and eliminating a greater number of risks. Though contemporary stakes are high that what they were five years ago resulting in an average profitability loss of 107% (Logistics 2009). But at the same time CEOs are struggling to prioritize the overwhelming number of risks that indirectly leads to unfocused plans and poorly coordinated responses (ibid). Competing with others become critical for the logistic firms when there is a concern to reduce costs while continuing to guarantee the quality of products. This requires ensuring efficient execution of outsourced activities in a complex trading and production scenario which is a difficult phenomenon in a compet itive environment. In this context, it is indispensable to identify, evaluate and extenuate potential disruptions in SCM in a systemic manner so as to control or minimize the risk of product recalls (Gomer 2009).

Alfred Stieglitz's Photograph of Marcel Duchamp's Fountain Term Paper

Alfred Stieglitz's Photograph of Marcel Duchamp's Fountain - Term Paper Example The paper "Alfred Stieglitz's Photograph of Marcel Duchamp's Fountain" focuses on analysis and research about Alfred Stieglitz's photograph of Marcel Duchamp's Fountain art work. Stieglitz placed the ‘Fountain’ at the viewer’s eye level, brought it close, and magnified its presence. He further rotated it slightly on its axis to set up just a touch of tension, and lighted it from above such that it looks dramatically isolated against its setting yet also veiled, moody and mysterious. Duchamp’s ‘the Fountain’ is viewed through the eyes of Albert Stieglitz. The photograph is white in color that is made of the spectrum of colors. It is made of porcelain which is a polished/breakable material. Stieglitz took an ordinary object, gave it meaning by positioning it in such a way that its useful significance was overshadowed by the new one with a new title and a new point of view, thus creating a whole new thought for that object. Alfred Stieglitz life s panned from 1864 to 1946. Stieglitz was the most respected photographer of his time, and he fought for the recognition of photography as a valid form of art. He is one of the figures who revolutionized the American photography. Luminous-Lint finds it hard to imagine the direction that photography would have taken without the involvement of Stieglitz. He was a promoter of other people’s works, illuminating them with his photo works. The ‘Fountain’ was brought to 291, and when it was there it was photographed by Stieglitz who was greatly amused by Duchamp’s ‘Fountain’.

Logistics and Supply Chain Management Case Study

Logistics and Supply Chain Management - Case Study Example Examples like Wal-Mart and Benetton are in front of us where logistics transformed the form of core competence which is strategically positioned for bringing market success for the organization (Drew & Smith 1995). This, on one hand, gives a competitive advantage to one organization, on the other hand, it is achieved at the cost of exploiting the other. Such exploitation in market terms can be labeled as 'weapon' that once used against the competitor provides benefit at the cost of bringing loss to the competitor. This can be illustrated by the fact that an organization can increase or decrease the goods supply to the market or can purchase the services of major supply chain companies irrespective of the fact he uses them or not, but to choke other companies particularly competitors from getting supply chain services for their goods supply. Unless the competitor is efficient enough to detect what is going on behind the curtain, he is unable to rectify the cold war being played agains t him by his rivals. However, Drew & Smith (1995, pp. 24-33) points out that excessive exploitation can produce dangerous results if the organization adopts a rigid behavior. Similarly, this 'explosive weapon' can result in fatal blind spots if used in a single direction without considering other factors. For instance, supply chain integration once stops at the factory door may annoy large organizations to exploit more but since logistic firms are aimed to improve their performances, such exploitation will probably not work. Traditional supply chain delivers limited value to companies for which there is a political competition going on among competitors. In contemporary fast-paced supply chains, managers or CEOs lack insight into the ripple effects of their decision (Boyson et al 2004, p. 99). Logistical challenges are confronted by the firms who not only assume a static environment but look at each problem individually. For instance, a company when switches from long-term contracts to short-term buys it suffers temporarily for the decision will influence the logistic options available to the organization including short-term variability, the price of the product and supplies.   With the lengthening of supply chains, logistics executives are increasingly taking the onus on their shoulders for anticipating and eliminating a greater number of risks. Though contemporary stakes are high that what they were five years ago resulting in an average profitability loss of 107% (Logistics 2009). But at the same time CEOs are struggling to prioritize the overwhelming number of risks that indirectly leads to unfocused plans and poorly coordinated responses (ibid). Competing with others become critical for the logistic firms when there is a concern to reduce costs while continuing to guarantee the quality of products. This requires ensuring efficient execution of outsourced activities in a complex trading and production scenario which is a difficult phenomenon in a compet itive environment. In this context, it is indispensable to identify, evaluate and extenuate potential disruptions in SCM in a systemic manner so as to control or minimize the risk of product recalls (Gomer 2009).

PGCE- Primary Teaching Personal Statement Example | Topics and Well Written Essays - 500 words

PGCE- Primary Teaching - Personal Statement Example addition to my vocational qualifications in advertising, PR and Media, I would make to the position a proven ability to deal successfully and tactfully with children and colleagues. Although my course does not involve a subject in the national curriculum, I still possess a basis for primary teaching. Throughout my course, I have had to write advertisements and participate in field practical that have enhanced my communication skills. I can replicate this training in a classroom setting to capture children’s attention and have them respond appropriately. The nature of my advertising, PR and Media degree course has prepared me adequately for this position as there are areas that aid my understanding people’s thought processes when presented with information. Media training and advertisement has helped me understand the mechanics of communicating with wide and varied age groups. The learned PR skills will come handy in understanding children and develop strategies to aid learning. In addition to my strong theoretical basis for the course, I obtained practical experience for teaching. While on a three-week placement abroad, I observed that a teachers approach to the class has a far reaching effect on the learner’s ability. For example, a teacher often changed the ways he taught a class to maintain the interest of the children in those activities. She encouraged and celebrated children who were experiencing difficulties in certain activities. The motivation spurred them to try harder, and they succeeded in many cases. Her positive attitude reflected in children, giving them confidence in themselves hence an active learning environment. I had the opportunity to guide the class in story telling which preceded an ICT lesson that would require class discussions. It was evident that some children are happy to participate in this environment while others were not quite as keen. It is, therefore, imperative that teaching practitioners design strategies that would

Harley Davidson’s Just-in-Time Essay Example for Free

Harley Davidson’s Just-in-Time Essay This case is about the Just-in-Time (JIT) implementation at Harley-Davidson Motor Company. After World War II, they faced  with  competition from Japanese companies, which were able to produce better quality motorcycles at comparatively lower cost. Harley-Davidson found that there were three most important practices of Japanese companies, which differentiated their production process from that of others: JIT manufacturing, employee involvement, and statistical process control. Harley-Davidson adopted those three principles and formulated different strategies to make this move possible and to make its manufacturing processes as efficient as that of its Japanese counterparts. The company finally succeeded in achieving its goals of reducing the cost of production, improving quality, and increasing its market share. With the company again getting into hard times, this case presents how it was trying to focus on â€Å"continuous improvement† in a bid to bring itself back into profits. Question #1: Why has continuous improvement been so successful at Harley Davidson? Continuous improvement is ongoing effort to improve products, services or processes. These efforts can seek â€Å"incremental† improvement over time or â€Å"breakthrough† improvement all at once. Under continuous improvement, a task or series of tasks were identified as the problem area in the business process, manufacturing operations, and product development where improvement could be made. Harley-Davidson required the active participation and commitment of its employees to help in eliminating unnecessary steps and complexity for the process and to bring more flexibility into the system. Continuous improvement helped the company identify savings opportunities and put those mechanisms into places, also improved the quality standards and the reduced the waste in the forms of cost, time and defects. Therefore with a year, all Harley-Davidson’s manufacturing operations were being converted to JIT: components and sub-assemblies were â€Å"pulled† through the production system in response to final demand. Question #2: Considering the road ahead, what specific actions can Harley Davidson take that will move them toward their goals? Harley Davidson could keep doing â€Å"continuous improvement. Take a closer look at its operations in a bid to get its cost structure right and manage shipments consistent with the expected slowing of consumer spending. For continuous improvement, its begins with identify the current process and take a vote on which process would most benefit from improvement, then map out the existing process using a project board like A3 report. After fully understand the process, identify areas of opportunity surrounding the mapped process, to do this teams should analyze the current process and scrutinize areas that may be streamlined. Finally, the team will decide on a new process. In order to reduce excess capacity or costs and gain efficiencies, the company has consolidated some of its production facilities, and parts, accessories and general merchandise distribution operations to improve its overall process. The company also made it a high priority to manage supply in line with demand. In addition, the company started restructuring its production process to reduce complexity and create the flexibility to produce multiple product families on the same assembly line every day at the beginning of 2009.

The Parallel Paths of Overprotected and Neglected Children

The Parallel Paths of Overprotected and Neglected Children Commercials and posters flood our daily lives by projecting images of helpless children who are in desperate need. Many people are aware of the children living in poverty, orphans, and abusive households. The media portrays neglected children who suffer from malnutrition, starvation, and the absence of love. In return, the advertised organization seeks for a small contribution of a dollar a day to help make a childs life better. However, what about the child who endures the exact opposite of neglect? Less attention is veered towards the silent abuse of parents who control their child to the extreme that they are actually hindering their development and performance by not allowing their child to grow and experience life healthily. Does a child who is overly cared for and overly protected by their extremely overprotective parent still possess a better life than the child who is neglected? Or is the overprotected child just as helpless as the neglected? Significance: The children today are the future and faces of tomorrow. A childs future is greatly influenced by his or her parents. A parent who is abusive restricts a child from possessing a healthy lifestyle and developing healthy relationships with other individuals. However, a parent who is over controlling will limit a child from developing essential skills necessary to govern and direct their own life in a positive and healthy manner. Yet many fail to acknowledge this and assume that parents are just being loving and caring; emotions that all parents and guardians are expected to express. Therefore, many people do not listen to these children and believes that their problems are not as severe as the children who suffer from physical or verbal abuse. This is significant to human development because many children suffer from the limitations their overprotective parents impose and do not have access to the same amount of help and assistant as children with abusive parents. Problem Statement: Through my research, I hope to raise public awareness of this silent abuse. Most importantly, I hope to reach out to parents who are over controlling, as well as abusive, and have them place their childs interests before their own. If a parent, who is over protective of their child, cares about their child deeply, then they should care more about their childs wellbeing rather than their own personal desires and expectations of their child. Literature Review: Parents who overprotect their child to the extreme can prevent their child from acquiring the basic fundamental skills of life. As a result, the child can become emotionally handicap and rely on his or her parent throughout their life. As stated by Cossentino, children in this situation are not able to develop a knowledge of independence and remains bound to the parent while the parent is bound in a cycle of overprotection (The Overprotected Child). This dangerous cycle leaves the child and parent bonded together in such a way that it is unhealthy for both members. The child relies on their parent immensely that the parent is responsible to attend to every single matter of the childs life; from basic chores, resolving a conflict, to communicating with acquaintances of the child. This often stifles the growth and development of a child, who cannot live without authority. Thus, the parent cannot leave this cycle because the parent raised the child in this manner. Children lack a knowledge of resolving conflicts and have a high chance of being rejected by their peers due to low confidence and an inability to stand up for oneself (Cossentino). With parents always protecting them, the child will never be aware of how to stand up for oneself and is unable to confront the realities of life. These children have the inability to be very social among others besides their own parents, which causes them to develop a low self-esteem as well as low self-confidence. The inability to make decisions on his or her own can cause a child to be unprepared for the future and is unable to live without a parent or authority figure. As stated by Cossentino, children will lack life-experiences of decision making, life skills, age appropriate freedom, and conflict resolution. An overprotected child becomes bound to a parent in a way that is similar to how a baby is bounded to its mother for the rest of its life. The child is completely unprepared for freedom and responsibility, finding it hard to exercise self-discipline and is more vulnerable to getting emotionally hurt. As argued by Guthrie and Matthews, Overprotecting parents can lead children to develop Peter Pan Syndrome (No More Push Parenting, 44). The Peter Pan Syndrome affects people who do not want or feel unable to grow up. In other words, people with the body of an adult but the mind of a child. Peter Pan was a fictional character who refused to grow up and had a never-ending childhood. Those with this syndrome do not know how or do not even want to stop being children and start being adults. These people are unable to grow up and take on adult responsibilities; they see the adult world as very problematic and glorify being a child, which is why they want to stay in that state of privilege. Children who have been neglected on the other hand are in complete control of their life and are forced to survive on their own. Neglected children do not have an authority figure and may be more likely to replace the unknown feeling of love with hate and anger. Children tend to try and please their parents to gain affection. However, when they cannot please their parents, they become filled with rage and take their anger out destructively (Nguyen). The violence neglected children seek for may be towards other individuals or other substances, but for some, they seek to hurt themselves. Children repress rage only to become depressed and suicidal (Watkins, A3). These children possess a great amount of emotion built up inside them that it becomes unbearable and hard to deal with. Thus, they try to fill the void of love in their life with other things or someones acceptance. As Andron stated, Children with low self-esteem search for someones acceptance, which usually winds down a damagin g path eventually set up for death or become life-threatening (23). More than likely, they fall under peer pressure or experiment with drugs and alcohol, anything to make them feel accepted. Because they lack a knowledge of what is normal or who to trust, they are more vulnerable to perpetrators and are often abused by their peers. One form of violence an individual may express is through school. For example, the University of Texas massacre in Austin left 18 dead while the Columbine High School took a death toll of fifteen, and the highest toll of thirty-three lives was the Virginia Tech massacre (Watkins, A3). When an individual commits a crime, he or she is questioned for the reason of their action. However, few people turn to the parents or even glance at the childs home life. Children turn to destructive manners for coping as a way to test if their parents really care for them or not (Nguyen). By hurting oneself, an individual tests the love of a parent, or to see if anyone else bothers to really care. Many parents are incapable of seeing the damaging effects of placing their own needs before their childs. They fail to see the atmosphere and living situation they created and forced their child to endure. Most importantly, they fail to treat and raise their child healthily. By overprotecting to the extreme, a parent not only shields a child from pain, but also robs the child of their adulthood by keeping them from developing friendships, intimate relationships, and independent skills along their journey of life. Thus, through neglect, a child is forced to learn how to survive through life on their own without the protection of a parent, without the love and guidance a parent has to offer, and without the comfort of a real family. Therefore, what is worse: overprotection or abandonment? Methodology: By listening to the personal stories of my volunteered subjects, I hope to obtain data that reflects whether or not both children, who are on opposite ends of the spectrum, share the same difficulties. The individuals I will choose will be children and their parents who reside in Cambodia. Cambodia is a poverty-stricken country and the home to many neglected children who roam the streets begging for food. Sadly, because of this, it will not be difficult to find a neglected child to speak with. The difficulty will be trying to find the parent or guardian of the neglected child and persuading him or her to share their own personal story. In addition, families who are wealthy have higher expectations for their children and try to mold their child into what they want by controlling every aspect of their childs life. Because of this, I will listen to the stories of a child is in a more well-off family and his or her parents story .

Chicago Hope Essay :: essays research papers

Chicago Hope Essay Chicago Hope is a TV Drama. The show uses camera shots and angles', lighting, dialogue and characters to portray the attitudes and values of the director. These are also used to push across themes. The values and attitudes that are strongly pushed across in this episode are Relationships, Law and order, gender and race and Men's health. A major relationship that is focused upon in this episode is the one between Dianne and Margaret, who is supposedly Dianne's lost mother. The fact that Margaret gave Dianne up for adoption at birth means that this reunion will be a very delicate one. The close up of Dianne in the car before she gets out the car to met her mother shows her feelings and makes it known that this is an important moment for both mother and daughter. The extreme close up when Dianne says 'I'm the daughter'; shows us the full impact of the statement and it makes us feel for Dianne and what she is going through at that moment. When Dianne is in the bathroom and she opens the cabinet it frames her face, when she closes it and there are two figures in it. We are filled with shock, and the suspense of what will happen to her next keeps us involved and interested in the show – the music that is playing in this scene also adds to the dramatic tension. The next part of this story line sees Margaret talking about how she knows abit about medicine because she had a hysterectomy. By mixing up the dates we start to feel that something isn't quite right. While Margaret is talking about the hysterectomy and how there we complications we are being lead toward the attitude that doctors aren't always right nor are they Gods. In the shower scene there are sound effects of creaking taps, water-running and so on, this gives us the impression of a creepy old house. The close up of Dianne with the silhouette in the background gives us the feeling that something bad is about to happen and that she is going to be the poor unsuspecting victim. This scene is exactly the same as the shower scene in Alfred Hitchcocks' 'Psycho';. When Dianne has found out that Margaret is really Alfreda Perkins, Billy wants to leave but before they can Margaret comes out with a knife. This immediately makes us think that she is going to turn out like the psycho lady we think she is.

Vital Nature Of Human Being Engineering Essay

Bing in comfort zone is a critical nature of human being. Something less attempt able ever attracts human head. This invention belongs in a zone far more advanced than a fan operated by a manual regulator. This device controls the velocity of the initiation motor used in a fan automatically by feeling the current. Like normal family fan regulators it does non necessitate any attending for commanding the velocity of the fan and therefore it reduces human attempt which is really much clear to us. It uses a TRIAC ( Triode for AC ) based circuitry which minimizes energy ingestion and therefore saves power Vongmanee ( 2004 ) . It gives a broad control of working temperature scope to the user while besides supplying manual control in instance of demand. These characteristics are every bit interesting every bit good as really utile for the mediocre category because of a low purchasing and care cost. This whole invention will be discussed in wining points. Power electronic convertors can be found wherever there is a demand to modify the electrical energy signifier ( i.e. modify its electromotive force, current or frequence ) . Therefore, their power scope from some milli watts ( as in a nomadic phone ) to 100s of megawatts ( e.g in a HVDC transmittal system ) . With â€Å" classical † electronics, electrical currents and electromotive force are used to transport information, whereas with power electronics, they carry power. Therefore the chief metric of power electronics becomes the efficiency Rabisankar ( 2012 ) . Most power electronics systems consist of two major faculties which are power electronics processor that handles power transportation from input to end product and accountant that tells the power processor of what to make by taking the measuring that happens at end product and compared to input.Problem StatementNowadays, many industries utilizing electrical machine in their mill. Electrical machine are used to do the work can be done in clip and to cut down work force in the industry. There is several type of electrical machine we are utilizing today. We have DC motor such as DC series motor and DC shunt motor. We besides have synchronal motor that runs at changeless velocity and we are besides holding initiation motor. A rectifier is an electronic circuit that converts bidirectional electromotive force ( AC electromotive force ) to unidirectional electromotive force ( DC electromotive force ) by utilizing power rectifying tubes or by commanding the firing angle of thyristor/controllable switches. Rectifier normally can be divided into two types that are uncontrolled and phase-controlled. Each type can hold either individual stage or three-phase. A rectifying tube is the simplest electronics switch which it is uncontrolled that the on and off provinces can be determined by the power supply in the circuit itself. AC to DC convertor is largely used in industries and besides in domestic equipment. But many rectifiers in the market merely produce fixed end product so the applications of the rectifiers are limited for certain equipment merely. So, the DC degree of the end product and the power transferred to the burden are fixed when the beginning and burden parametric quantities are established. Holmes ( 1993 ) , Zein ( 1999 ) and Kischan ( 2010 ) . Therefore, to get the better of this job there is a manner to command the end product electromotive force of the rectifier. Basically, the individual stage rectifier is designed utilizing the thyristors or more specifically are called Silicon Control Rectifier ( SCR ) which connected in full-wave rectifier. A thyristor is four beds ( pnpn ) semiconducting material devices that act as switches, rectifiers or electromotive force regulators. Thyristors are electronic switches used in power electronics circuits where control of switch turn-on is required power Vongmanee ( 2004 ) . Therefore, the end product electromotive force can be variable from the scope of nothing electromotive force to full electromotive force by commanding the hold angle of the SCR.Aim and Aims1.3.1 AimThe purpose of the undertaking is to command the velocity of individual stage initiation motor utilizing microcontroller.1.3.2 AimsTo plan the AC electromotive force convertor to changing motor electromotive force To implement the velocity detector for feeling the velocity To compose the plan for commanding the operation of electromotive force convertorScope of the surveyThis undertaking concentrates on a development of a circuit and hardware to acquire dc end product utilizing SCR and PIC16F84A as chief constituent of the undertaking. Besides the Scopess is to plan a microcontroller to command hold angle I ± and it produced variable end products ( velocity ) . To develop the whole undertaking, it consists of three methods which are the construct of shift, the electrical construction, and the package scheduling. After planing and edifice wholly the rectifier circuit, the driver circuit should be able to command the hold angle I ± , that can be adjusted by utilizing microcontroller. It will affect the scheduling development to command the ON province of the power switch and adjust the stage angle. Here, the trigger angle of SCRs will be programmed in certain clip sequence to guarantee the input electromotive force goes from low to full electromotive force.Report StructureThere are all six chapters being constructions in this thesis and every chapter will lucubrate in item about this undertaking. For the first chapter, an overview about this undertaking, Speed Control of Single Phase Induction Motor is discussed including the aims and Scopess of the undertaking as a usher to develop the individual stage controlled rectifier. Chapter 2 will explicate and discourse on the literature reappraisal of the Speed Control of Single Phase Induction Motor. It besides focuses on general debut of the AC to DC convertor with the complete information about this convertor. It gives a brief reappraisal about the types of the rectifiers: uncontrolled and controlled individual stage and three stage convertors used as rectifiers. In this chapter besides discuss about the type of thyristor andthe feature of each type. Chapter 3 discusses the methodological analysiss of the Speed Control of Single Phase Induction Motor that has been applied in finishing this undertaking. In this chapter, it consists of block diagram and flux chart which are explained about the procedure of execution and how the AC electromotive force converts to DC electromotive force so connected to the burden such as DC motor. It is besides discusses briefly how the end product electromotive force can be varied. Chapter 4: we discuss the package and hardware execution of the Speed Control of Single Phase Induction Motor utilizing flow charts and simulation consequences for package execution and PCB layout and hardware working for hardware execution Chapter 5 is discoursing and exposing all the consequences obtained and the restriction of the undertaking. All treatments are concentrated on the consequence and the overall public presentation of the Speed Control of Single Phase Induction Motor. Chapter 6 in overall will discourse on the decision and sum-up of the development of the Speed Control of Single Phase Induction Motor completed undertaking. In this chapter besides discusses on the jobs and recommendation for this undertaking development or alteration.Chapter 2LITERATURE REVIEW & A ; THEORETICAL BACKGROUND2.1 IntroductionThe literature reappraisal and the theoretical background about this undertaking have been made from assorted beginnings like diaries, books, articles and others. From the literature reappraisal, the input that have been collected is utile for better apprehension of this undertaking. It is because for about a century, rectifier circuits have been the most common power electronics circuits used to change over AC to DC. The AC-DC convertor produces a DC end product from an AC input while the mean power transferred from an AC beginning to a DC burden. This convertor normally besides called as a rectifier. The word rectification is used non because thes e circuits produce DC but instead because the current flows in one way. By and large, there are two types of AC-DC convertors which are uncontrolled and controlled.2.2 Literature ReviewHere in the literature reappraisal we understand about this undertaking have been made from assorted beginnings like diaries, books, articles and others. From the literature reappraisal, the input that have been collected is utile for better apprehension of this undertaking2.2.1 Background of Induction motorInitiation motors are little motors holding an end product power less than one Equus caballus power and are by and large operated on individual stage AC supply. These motors perform assortments of service in the place, office, concern concerns, mills and farms and in a figure of other applications where individual stage supply is available. The velocity of initiation motor can be reduced by diminishing stator electromotive force by an sum which is sufficient for the velocity control of some thrusts. While torsion is relative to voltage squared, current is relative to voltage hence, as electromotive force is reduced to cut down velocity, for same current motor develops lower torsion. Consequently, method is suited for application where torsion demand reduces with velocity, which points towards its suitableness for fan and pump thrusts. Variable electromotive force for velocity control is obtained utilizing ac electromotive force accountants. Industrial fans and pumps are normally driven by initiation motors. Thyristors are normally used for commanding the electromotive force to command the velocity of initiation motor. Speed control is obtained by changing conductivity period of thyristors. For low power evaluation machines, anti-paralleled thyristor brace is used.A Speed of the motor can be varied more or less uniformly in the scope of 80 % to 30 % of synchronal velocity of the motor by changing the electromotive force between 100 % to 30 % . The stator electromotive force is controlled in these velocity control systems by agencies of a power electronic accountant. Here two thyristors in anti-parallel are connected between the line and motor in a stage. Normally thyristors in stage control manner are used. It is besides possible to fire the thyristors for merely a part of the rhythm, therefore using conductivity angle use. This is utile in motor control.A A The conductivity of thyristor brace is controlled by altering firing angle of thyristors through microcontroller.2.2.2 Review on Speed Control of Single Phase Induction MotorIn this undertaking the writer speaks about An adjustable velocity thrust moving on the subsidiary twist of single-phase initiation motors is described. Speed fluctuations are obtained by seting the electromagnetic torsi on by commanding the subsidiary twist electromotive force magnitude and stage angle while the motor ‘s chief twist is straight connected to the local public-service corporation mercantile establishment. A variable subsidiary twist electromotive force stage angle is shown to give important torsion control, supplying get downing and driving torsion, every bit good as reversability and some braking torsion. The analysis includes the finding of the relationship between the subsidiary twist electromotive force stage angle and the stage angle difference between the chief and subsidiary twist currents. A control methodological analysis for choosing an subsidiary twist electromotive force magnitude and stage angle is examined. Simulation consequences of the motor ‘s torque-speed features utilizing the controlled subsidiary twist supply are shown and discussed. In decision the thrust was tested utilizing a ergometer to by experimentation verify the consequences of the theory and simulations, and to research the practicality of a simple, low-priced single-phase initiation motor thrust utilizing subsidiary tortuous electromotive force control Collins ( ) Then the writer in this paper reports about a High-performance Speed-Sensorless Control of an Induction Motor Drive Using a Minimalist Single-Phase PWM Converter where he states that Home contraptions and comfort conditioners are yet to profit from the recent developments in power electronics because of cost restraints. In this paper, a speed-sensorless initiation motor thrust system utilizing convertors with decreased device counts ( minimalist, thin convertors ) and actuated from a single-phase system is proposed for such low-priced applications. The analysis, control, dynamic, and steady-state features of the proposed thrust are by experimentation illustrated. In decision the undertaking was able to show the methodological analysis for the analysis and control of a high-performance initiation motor thrust actuated by two controlled rectifier-inverter systems with decreased count of exchanging devices. The general attack for finding the transition signals required for the carrier-based PWM pulsation coevals for this category of minimalist convertors has been set Forth. The input supply electromotive force is a individual stage and the input current is controlled utilizing a natural mention frame accountant to run near to integrity supplanting power factor. Olorunfemi ( 2005 ) This paper the writers Rodrigo and Hilton ( 2006 ) investigates the job of single-phase initiation motor ( SPIM ) sensorless velocity control. A distinct clip PI accountant and a sensorless technique are implemented on a PC-based platform utilizing a standard three-phase inverter thrust and vector control. An indirect rotor flux oriented control technique is developed based on a sensorless technique. A MRAS with a Kalman Filter algorithm is developed for a rotor velocity appraisal. In decision the Simulation and experimental consequences are presented to formalize the effectivity of the method. a MRAS sensorless control method was applied to a single-phase initiation motor. A MRAS algorithm was used to gauge the rotor velocity, from the computation of the motor instantaneous reactive power. In add-on, a Kalman Filter was used to filtrate the works variable provinces for a minimisation of the velocity estimation oscillations. An Indirect Field Orientation Control technique was used in the individual stage initiation motor thrust. This method is an alternate for single-phase initiation motor thrusts and can better efficiency with variable velocity operation. Experimental and simulation consequences show the effectivity of the technique. Here the writer sates that A centroid-based binary weight multiplier ( CBWM ) exchanging technique was proposed, which was suited for full-bridge inverter applications of individual stage initiation motor ( SPIM ) velocity. control by utilizing 8 spot CBWM to modulate square single-phase wave form and merchandise a control signal form. This technique was evaluated, and its public presentation was compared with bing BRM exchanging technique. In decision the public presentation rating and comparing was involved to the entire harmonic deformation ( THD ) , figure of pulsations per rhythm of the inverter end product wave form, both evident and reactive power. The aim of the new shift technique is to minimise the THD. The simulation consequences presented in this paper, the CBRM shift technique yields a important betterment in footings of minimum THD ( 5 % -100/ , ) when comparison with BRM. The CBWM has been considered to use for variable-speed of the individual stage three stage initiation motor thrust applications in footings of changing electromotive force and changing frequence Tipsuwanpom ( 2001 ) . This paper describes a low cost strategy for commanding the velocity of a three stage initiation motor. The motor was connected to a individual stage supply via a two component stage balancer. Speed control is achieved by changing the supply electromotive force utilizing the stage angle control. Theoretical analysis is supported by experimental measurings. Finally as consequences a new and cost effectual strategy for commanding the velocity of a three stage initiation motor fed from a individual stage supply has been presented. The proper strategy requires a individual stage supply and two thyristors as opposed to the three stage supply and six thyristors in the conventional strategy. A two-element stage balancer has been used in the new strategy to accommodate the motor to the supply. The two elements are made pure reactive elements in order to cut down the Cu loss. The value of the two reactive elements can be selected to be variable to guarantee zero negative sequence electromotive force for whole the scope of operation. Alternatively, the strategy may be simplified by choosing an mean fixed value for the two elements to give about minimal imbalance between the stator electromotive forces in order.to achieve better public presentation both in the steady province and transeunt conditions. Experimental consequences confirm the high qu ality of the proposed strategy. Alolah ( 1993 ) In this paper the writer Jannati ( 2011 ) states that This paper discusses a new vector control scheme for single-phase initiation motor runing with two twists. The vector control is based on the Rotor Field Oriented ( R.F.O ) method that was adapted for this type of machine. This new vector control is suited for all of the imbalanced initiation motors. Furthermore the rotor velocity of the imbalanced motor was estimated by utilizing Extended Kalman Filter ( EKF ) . The consequences shows the good public presentation of the proposed method. Single-phase initiation motors are widely used in the place and industrial applications. Although the power of these motors is low the figure of them is high and they use a big portion of produced electrical power. On the other manus the efficiency of these motors is low so we can state that a big sum of electrical power is wasted by these types of motors. In this paper, we proposed to utilize a power electronic thrust to increase the efficiency of the individual stage initiation motors. In add-on, we proposed a new method for the vector control of the motor. In this paper is focused on the velocity control of a individual or two stage initiation motor utilizing a diametral inversion ( DI ) of the stator electromotive forces. The alterations in the velocity mistake mark are responsible for each DI which inverts the stator electromotive force phasor and its angular speed. The chief and the subsidiary twists are ever connected and therefore the velocity mistake mark allows to determinate the revolving field way. The motor is fed by a rectifier associated with a three-phase inverter. The nucleus of the thrust bid it ‘s a 16-bit dsPIC device, which receives the velocity mistake mark and bring forth the appropriate PWM mention electromotive forces marks to the three-phase inverter. In decision In this new attack the diametral inversion was used, avoiding the rotor flux place finding in every blink of an eye. With this bid action the applied electromotive force phasor can be inverted and revolve in the opposite way depending on the velocity mistake mark. As effect, the torque way can alter really rapidly and the thrust will hold a good public presentation. Hence, the motor velocity can be easy adjusted. The consequences revealed that the rotor velocity reaches the mention velocity without relay Manual ( 2008 ) . The writer Deniz and Murat ( 2008 ) presents a variable velocity control method for fan applications. A pulse-width-modulated ( PWM ) AC chopper changes the effectual value of the supply electromotive force applied to a single-phase initiation motor. This variable supply electromotive force gives the ability to command the velocity of the motor. Harmonicss generated by the velocity control unit are by an input harmonizing to EN 61000-3-2 bounds for harmonic current emanations criterions. In decision A 25kHz PWM AC Chopper used in a single-phase initiation motor thrust was designed and realized in this survey for both domestic and industrial fan applications. This circuit can be used to command the motor velocity harmonizing to the temperature mention. Due to high frequence shift, the PWM AC chopper does non bring forth low frequence harmonics which are multiples of the 50Hz constituent. The harmonic deformations appear at higher frequences that are really multiples of the shift frequence and really easy to filtrate. This paper on Single-phase Induction Motor Speed Control Through a PIC Controlled Sinusoidal PWM Inverter to analyze the public presentation of a single-phase PIC ( programmable integrated circuit ) controlled sinusoidal PWM inverter driving a single-phase initiation motor ( with get downing capacitance ) at assorted burden conditions ( 3/4 of burden and full burden ) . The control was implemented in such a manner that it is allowed the alteration in the motor velocity via a PIC. The attraction of this constellation is the riddance of a personal computer to bring forth sinusoidal PWM pulsations. As consequences it was able to accomplish the chief undertaking in this work, is to do a compact openloop sinusoidal PWM inverter to command the velocity of an little single-phase initiation motor. This compact inverter had its hardware reduced to a lower limit through the usage of a programmable incorporate circuit ( PIC ) micro-controller ( PIC16C73A ) . In this sense a personal computer interface was avoided. One of the troubles was the deficiency of information on the most efficient control logic in this instance and its aims. One of the grounds was that the usage of a PIC in such applications is really recent, the other ground is the deficiency of importance in the industry ‘s sentiment of the single-phase accountants when compared with three-phase control systems Cunha ( 2001 ) . In this paper a Single stage initiation motors ( SPIM ) are widely used at low power degrees because of their simple building, robust nature and nominal monetary value. Conventionally, they have one operational stator twist and the velocity of the motor is non controlled. But SPIM drives for higher power degrees have both chief and subsidiary twist staying operational throughout and can be treated as asymmetrical, two-phase machines. High public presentation operation of these asymmetrical machines was associated with the jobs of patterning the dissymmetry and commanding the electromagnetic torsion oscillations. Different research groups have proposed different strategies to undertake the above said troubles. In decision the theory, analysis and simulation consequences for the vector control technique for SPIM based on stator flux orientation are presented as above. From the consequences, it can be concluded that both for flux weakening part ( above base velocity ) and changeless flux zone ( below base velocity ) , the algorithm performs satisfactorily. The little torsion oscillations are low-cost sing the simpleness of the algorithm Nanda ( 2011 ) . This paper presents the photovoltaic ( PV ) H2O pumping system with a maximal power point trailing ( MF'PT ) . The H2O pumping system uses a variable velocity individual stage initiation motor ( SPIM ) driven a centifugal pump by a field oriented control ( FOC ) inverter. The system under survey consists of two subdivisions. First, the MPPT utilizing a DC-DC convertor controlled the responsibility rhythm to track maximal power 60m PV under different sunstroke conditions. The responsibility rhythm straight relate with a flux bring forthing current constituent ( Ids ) . Second, the FOC inverter uses a current control electromotive force beginning inverter ( CC-VSI ) for SPIM driven the centifugal pump. As consequences the field oriented control individual stage initiation motor thrust system supplied by photovoltaic arrays is presented in this paper. The SIMULINK plan is used tool in simulation for determine the respond of thrust system by closely generated status with the degree of light strength alteration. The simulation consequence is demonstrated the respond of thrust in electromotive force ( Vdq ) , current ( Idq ) , motor ‘s velocity and electromagnetic torsion which are changed as measure input bid and measure burden. The decision are shown when the light strength degree alteration, the electromotive force and the velocity of motor are changed as good, ensuing from the system received the power increased. As reference, burden of motor pump is changed. The capacity of pump will precisely depend on the velocity of motor alteration Varni ( 2004 ) . In this paper the writer discusses about The diametral inversion ( DI ) of the stator voltages has been used to command the rotor place of the three phase- initiation motor. In this paper the DI is applied on a individual stage initiation motor thrust to command its velocity. The alteration of the velocity mistake mark causes a DI. Each DI inverts the stator electromotive force phasor and its angular speed. The chief and the subsidiary twists are ever connected and so the mark of the velocity mistake determines the revolving field way. The motor is fed by a rectifier associated with a three-phase inverter faculty. Two mention electromotive forces are PWM modulated utilizing a sigma-delta closed cringle scheme. As decision the consequence of an probe about a new attack to controsl the velocity of a individual stage or two initiation motor thrust was presented and its effectivity was analyzed by several simulation trials. In this new attack the diametral inversion was used. With this bid action the applied electromotive force phasor can be inverted and revolve in the opposite way depending on the signal mistake velocity. As effect, the torque way can alter really rapidly and the thrust will hold a good public presentation. The simulation consequences revealed that the rotor velocity reaches the mention velocity without muffling and with irrelevant wave-off in laden or unloaded conditions. The simulation consequences besides revealed that the velocity control presents high hardiness against external torsion perturbations Manuel and Armando ( 2008 ) . Here in Operating individual stage initiation motors across a broad scope of velocity and burden with high efficiency the writer Klaus ( 2009 ) has stated in the paper at manus the suitableness of several different capacitance run individual stage initiation machines for Phase Control, Integral ( Half ) Cycle Control or Integral Switched Cycle Control is investigated. The initiation machine ‘s theoretical account ‘s electrical and mechanical parametric quantities are estimated and simulations are carried out in order to look into the influence of the parametric quantities on entire input power, torsion and losingss. Measurements are carried out entering rotor velocity and entire input power comparing Phase Control and Integral Switched Cycle Control at about the same operating points. From these informations a simple method is derived that can be used for choosing machines for low cost velocity controlled thrusts. In decision the parametric quantities rotor weaving opposition and escape reactance provide a good standard for choosing individual stage initiation motors for low cost velocity control drives. These parametric quantities can be derived from the individual stage locked rotor trial, which is simple to execute, or can be obtained from the maker of the machine. Another possibility is to utilize the absolute value of the individual stage short circuit electric resistance as a step of the suitableness of a certain machine. The higher the per unit values of these parametric quantities are, the lower the input power and therewith the temperature rise at low velocity. In this paper a Single Phase AC Induction Motors are one of the most widely used motors In the universe, yet comparatively small work has been done In the application of power electronic convertors to these motors to accomplish variable velocity operation. Where variable velocity is required, it Is normally achieved either by mechanical choking, or by exchanging between two or more flexed twist constellations. This paper proposes a method for utilizing a standard three stage electromotive force beginning inverter to accomplish broad scope variable velocity control of a individual stage Induction motor, by linking the chief and subsidiary twists of the motor across the span as an imbalanced three stage burden. The motor Is analyzed as an imbalanced two stage system to find the torsion that can be expected under variable frequence control, and a new transition scheme Is described which achieves the maximal possible convertor for a two stage end product electromotive force ( balanced or unbalanced ) . In decision method for modulating a three stage VSI span to accomplish broad scope variable velocity operation of a balanced or imbalanced two weaving initiation motor. It investigates motor operation under these conditions, and considers restrictions inherent in the technique. From these probes, a precise transition scheme is proposed for supply frequences runing from nothing to motor rated frequence, so that rated torsion can be achieve from the motor at any velocity with the motor operating at a little faux pas. The scheme has been to the full verified both in simulation and by experimentation Holmes & A ; . Kotsopoulos ( 1993 ) . In this paper, a fresh velocity control of a individual stage initiation motor is proposed utilizing a modified inverter. Three MOSFETs are used for commanding the flux linkage of a individual stage transformer, its secondary twist is connected in series with the motor. On-line Bang-Bang velocity control of motor strategy is implemented utilizing a microprocessor to deduce the inverter. A mathematical theoretical account for the single-phase initiation motor is presented, which is used to construct up a simulation plan for a certain coveted velocity. Experimental consequences have been carried out to look into the motor public presentation with the accountant. Good understanding has been obtained between simulation and experimental consequences. In decision fresh method of velocity control of an ac motor ( single-phase running capacitance initiation motor ) by seting the flux linkage between two magnetic spirals utilizing a modified inverter and Bang-Bang control. This scheme influences the effectual tantamount induction of two spirals connected in series with the motor, accordingly control the motor applied electromotive force. Simulation and experimental survey have shown that, by this method of control the velocity of the motor can be changed swimmingly from zero value to the rated velocity with high response Zein ( 1999 ) . In this paper the writer Krischan ( 2010 ) states about a Low cost velocity control of capacitance run individual stage initiation motors across a broad scope of velocity and burden continues to be of involvement. In the paper at manus the line reaction every bit good as the electromagnetic compatibility of three different methods for velocity control – Phase Control, Integral ( Half ) Cycle Control or Integral Switched Cycle Control – is investigated. Measurements are carried out at different rotor velocity and burden torsion, comparing the methods at about the same operating points. FFT is computed for the line currents and measurings on electromagnetic compatibility. As decision they met the bounds given by the European Standard with Phase Control every bit good as with Integral Cycle Control, a brinies filter has to be used. Uniting Built-in Cycle Control with Phase Control leads to higher costs in order to follow with EMC ordinances but provides much higher efficiency.2.3 Theoretical BackgroundIn this subdivision we discuss about the theoretical background of our undertaking where we shall discourse about the chief hypothesis and the inside informations of the peripherals and constituents of the undertaking to construct in the proto type.2.3.1 Personal computer Software:Hardware can be interfaced with the personal computer to command the velocity of motor. It has no as such practical usage it is merely for larning point of position. Hardware can be connected with personal computer through a consecutive port. Consecutive communicating is used to pass on between hardware and package. Ocular basic 6 is used for doing this GUI ( Graphic user Interf ace ) . Baud rate is 2400 bits per second. Degree centigrades: UsersSONYDesktopic-max-232.jpg Figure 2.1 MAX 232 device TheA MAX232A is anA incorporate circuit, foremost created byA Maxim Integrated Products, that converts signals from anA RS-232A series port to signals suited for usage inA TTLA compatible digital logic circuits. The MAX232 is a double driver/receiver and typically converts the RX, TX, CTS and RTS signals.2.3.2 The ThyristorThyristors or Si controlled rectifiers ( SCR ) as they are sometimes known may look to be unusual electronics constituents in many ways, but they are peculiarly utile for commanding power circuits. As such these electronics constituents are frequently used for applications such as light dimmers, and there may be thyristor circuits used in many power supply applications. Thyristors are simple to utilize and cheap to purchase and frequently thyristor circuits are easy to construct and utilize. All these grounds make thyristors ideal constituents to see for many applications. The thyristor may be considered a instead an unusual signifier of electronics constituent because it consists of four beds of otherwise doped Si instead than the three beds of the conventional bipolar transistors. Whereas conventional transistors may hold a p-n-p or n-p-n construction with the electrodes named aggregator, base and emitter, the thyristor has a p-n-p-n construction with the outer beds with their electrodes referred to as the anode ( n-type ) and the cathode ( p-type ) . The control terminus of the SCR is named the gate and it is connected to the p-type bed that adjoins the cathode bed. Structure of a thyristor or Si controlled rectifier ( SCR ) Figure 2.2 Structure of a thyristor or Si controlled rectifier ( SCR ) Thyristors are normally manufactured from Si, although, in theory other types of semiconducting material could be used. The first ground for utilizing Si for thyistors is that Si is the ideal pick because of its overall belongingss. It is able to manage the electromotive force and currents required for high power applications. Additionally it has good thermal belongingss. The 2nd major ground is that Si engineering is good established and it is widely used for a assortment of semiconducting material electronics constituents. As a consequence it is really inexpensive and easy for semiconducting material makers to utilize. The manner in which a thyristor operates is different to other devices. Normally no current flows across the device. However if a supply is connected across the device, and a little sum of current is injected into the gate, so the device will â€Å" fire † and behavior. It will stay in the conducting province until the supply is removed. To see how the thyristor operates, it is deserving looking at a thyristor tantamount circuit. For the interest of an account, the thyristor circuit can be considered as two dorsum to endorse transistors. The first transistor with its emitter connected to the cathode of the thyristor is an n-p-n device, whereas a 2nd transistor with its emitter connected to the anode of the thyristor, SCR is a p-n-p assortment. The gate is connected to the base of the n-p-n transistor as shown below. Thyristor tantamount circuit Figure 2.3 Thyristor tantamount circuit When a electromotive force is applied across a thyristor no current flows because neither transistor is carry oning. As a consequence there is no complete way across the device. If a little current is passed through the gate electrode, this will turn â€Å" on † the transistor TR2. When this occurs it will do the aggregator of TR2 to fall towards the electromotive force on the emitter, i.e. the cathode of the whole device. When this occurs it will do current to flux through the base of TR1 and turn this transistor â€Å" on † . Again this will now seek to draw the electromotive force on the aggregator of TR1 towards its emitter electromotive force. This will do current to flux in the emitter of TR2, doing its â€Å" on † province to be maintained. In this manner it merely requires a little trigger pulsation on the gate to turn the thyristor on. Once switched on, the thyristor can merely be turned off by taking the supply electromotive force. It can be seen that current will merely flux in one way through the thyristor. If a contrary electromotive force is applied, so no current will flux, even if some gate current is applied. In this manner for thyristor circuits used for AC, operation merely occurs over one half of the AC wave form. For the other half of the rhythm the device remains inoperative and no current can flux. There are many thyristor circuits that are in common usage. They can be sued in many applications from AC control as am utilizing it here to command the velocity of AC motor. The thyristor driver – Opto-isolator: besides called anA optocoupler, A photocoupler, orA optical isolator, is â€Å" an electronic device designed to reassign electrical signals by using light moving ridges to supply matching with electrical isolation between its input and end product † .The chief intent of an opto-isolator is â€Å" to preventA high voltagesA or quickly altering electromotive forces on one side of the circuit from damaging constituents or falsifying transmittals on the other side Degree centigrades: UsersSONYDesktopoptocoupler.jpg Figure 2.4 the Thyristor driver2.3.4 AT89C51 microcontroller:The AT89C51 is a low-power, high-performance CMOS 8-bit personal computer with 4K bytes of Flash programmable and effaceable read merely memory ( PEROM ) . The device is manufactured utilizing Atmel ‘s high-density nonvolatilizable memory engineering and is compatible with the industry-standard MCS-51 direction set and pinout. The on-chip Flash allows the plan memory to be reprogrammed in-system or by a conventional nonvolatilizable memory coder. By uniting a various 8-bit CPU with Flash on a massive bit, the Atmel AT89C51 is a powerful personal computer which provides a highly-flexible and cost-efficient solution to many embedded control applications. Degree centigrades: UsersSONYDesktopSdochan89C51.jpg Figure 2.5 8051 Microcontroller