Gap between Management Theory and Practice Essay

Gap between Management Theory and Practice - Essay Example The evolution of the concept of management dates back to the early civilization. It is due to the art of effective management that those early civilizations produced marvelous wonders that are admired to date. There are many management theories that explain the different styles of management and their impact on the organization. Mason (2010) supported the argument and stated that there has always been a clash of opinions between the academicians, who develop theories of management, with actual professionals in the organizations. The basic difference has been described by Grayson. Management Scientists or researchers: develop management theories which guide the managers to become more organized and structured in their policies and procedures. They are expected to utilize scientific methodology, sociology for organizational decisions as well as people management.Managers: manage the operations and employees by their rule of thumb and need of the hour. They feel that standard theories of management cannot be applied to all instances and issues in a professional life. At times, the fast paced nature of modern business does not give leverage for standard policies and procedures to be developed and thus followed in a strict manner.

The History of the Clock

The History of the Clock The history of clocks is very long, and there have been many different types of clocks over the centuries. Not all historians agree on the history of the clock. The word clock was first used in the 14th century (about 700 years ago). It comes from the word for bell in Latin (clocca). Using the Sun The first way that people could tell the time was by looking at the sun as it crossed the sky. When the sun was directly overhead in the sky, it was the middle of the day, or noon. When the sun was close to the horizon, it was either early morning (sunrise) or early evening (sunset). Telling the time was not very accurate. Sundial Clocks The oldest type of clock is a sundial clock, also called a sun clock. They were first used around 3,500 B.C. (about 5,500 years ago). Sundials use the sun to tell the time. The shadow of the sun points to a number on a circular disk that shows you the time. In the big picture below on the right, the shadow created by the sun points to 9, so it is nine oclock. Since sundials depend on the sun, they can only be used to tell the time during the day. Water Clocks Around 1400 B.C. (about 3,400 years ago), water clocks were invented in Egypt. The name for a water clock is clepsydra (pronounced KLEP-suh-druh). A water clock was made of two containers of water, one higher than the other. Water traveled from the higher container to the lower container through a tube connecting the containers. The containers had marks showing the water level, and the marks told the time. Water clocks were very popular in Greece, where they were improved many times over the years. Look at the picture below. Water drips from the higher container to the lower container. As the water level rises in the lower container, it raises the float on the surface of the water. The float is connected to a stick with notches, and as the stick rises, the notches turn a gear, which moves the hand that points to the time. Water clocks worked better than sundials because they told the time at night as well as during the day. They were also more accurate than sundials. Dividing the Year into Months and Days The Greeks divided the year into twelve parts that are called months. They divided each month into thirty parts that are called days. Their year had a total of 360 days, or 12 times 30 (12 x 30 = 360). Since the Earth goes around the Sun in one year and follows an almost circular path, the Greeks decided to divide the circle into 360 degrees. Dividing the Day into Hours, Minutes, and Seconds The Egyptians and Babylonians decided to divide the day from sunrise to sunset into twelve parts that are called hours. They also divided the night, the time from sunset to sunrise, into twelve hours. But the day and the night are not the same length, and the length of the day and night also changes through the year. This system of measuring the time was not very accurate because the length of an hour changed depending on the time of year. This meant that water clocks had to be adjusted every day. Somebody finally figured out that by dividing the whole day into 24 hours of equal length (12 hours of the day plus 12 hours of the night), the time could be measured much more accurately. Why was the day and night divided into 12 parts? Twelve is about the number of moon cycles in a year, so it is a special number in many cultures. The hour is divided into 60 minutes, and each minute is divided into 60 seconds. The idea of dividing the hour and minute into 60 parts comes from the Sumerian sexagesimal system, which is based on the number 60. This system was developed about 4,000 years ago. Pendulum Clocks Before pendulum clocks were invented, Peter Henlein of Germany invented a spring-powered clock around 1510. It was not very precise. The first clock with a minute hand was invented by Jost Burgi in 1577. It also had problems. The first practical clock was driven by a pendulum. It was developed by Christian Huygens around 1656. By 1600, the pendulum clock also had a minute hand.http://www.arcytech.org/java/clock/images/pendulum2.gif The pendulum swings left and right, and as it swings, it turns a wheel with teeth (see the picture to the right). The turning wheel turns the hour and minute hands on the clock. On the first pendulum clocks, the pendulum used to swing a lot (about 50 degrees). As pendulum clocks were improved, the pendulum swung a lot less (about 10 to 15 degrees). One problem with pendulum clocks is that they stopped running after a while and had to be restarted. The first pendulum clock with external batteries was developed around 1840. By 1906, the batteries were inside the clock. http://www.arcytech.org/java/clock/images/pendulum_mechs3.gif As you already learned, a clock only shows 12 hours at a time, and the hour hand must go around the clock twice to measure 24 hours, or a complete day. To tell the first 12 hours of the day (from midnight to noon) apart from the second 12 hours of the day (from noon to midnight), we use these terms: A.M.Ante meridiem, from the Latin for before noon P.M. Post meridiem, from the Latin for after noon Quartz Crystal Clocks Quartz is a type of crystal that looks like glass. When you apply voltage, or electricity, and pressure, the quartz crystal vibrates or oscillates at a very constant frequency or rate. The vibration moves the clocks hands very precisely. Quartz crystal clocks were invented in 1920. Time Zones Because the Earth turns, it is daytime in part of the world when it is nighttime on the other side of the world. In 1884, delegates from 25 countries met and agreed to divide the world into time zones. If you draw a line around the middle of the Earth, it is a circle (equator). The delegates divided the 360 degrees of the circle into 24 zones, each 15 degrees (24 x 15 = 360). They decided to start counting from Greenwich (pronounced GREN-ich), England, which is 0 degrees longitude. In the continental United States, there are four time zones: Eastern, Central, Mountain, and Pacific. Each time zone varies by one hour, so when it is 7 p.m. in the Eastern time zone, it is 6 p.m. in the Central time zone, 5 p.m. in the Mountain time zone, and 4 p.m. in the Pacific time zone. Time Time, a central theme in modern life, has for most of human history been thought of in very imprecise terms. The day and the week are easily recognized and recorded though an accurate calendar for the year is hard to achieve. The forenoon is easily distinguishable from the afternoon, provided the sun is shining, and the position of the sun in the landscape can reveal roughly how much of the day has passed. By contrast the smaller parcels of time hours, minutes and seconds have until recent centuries been both unmeasurable and unneeded. Sundial and water clock: from the 2nd millennium BC The movement of the sun through the sky makes possible a simple estimate of time, from the length and position of a shadow cast by a vertical stick. (It also makes possible more elaborate calculations, as in the attempt of Erathosthenes to measure the world see Erathosthenes and the camels). If marks are made where the suns shadow falls, the time of day can be recorded in a consistent manner. The result is the sundial. An Egyptian example survives from about 800 BC, but the principle is certainly familiar to astronomers very much earlier. However it is difficult to measure time precisely on a sundial, because the suns path throug the sky changes with the seasons. Early attempts at precision in time-keeping rely on a different principle. The water clock, known from a Greek word as the clepsydra, attempts to measure time by the amount of water which drips from a tank. This would be a reliable form of clock if the flow of water could be perfectly controlled. In practice it cannot. The clepsydra has an honourable history from perhaps 1400 BC in Egypt, through Greece and Rome and the Arab civlizations and China, and even up to the 16th century in Europe. But it is more of a toy than a timepiece. The hourglass, using sand on the same principle, has an even longer career. It is a standard feature on 18th-century pulpits in Britain, ensuring a sermon of sufficient length. In a reduced form it can still be found timing an egg. A tower clock in China: AD 1094 After six years work, a Buddhist monk by the name of Su Song completes a great tower, some thirty feet high, which is designed to reveal the movement of the stars and the hours of the day. Figures pop out of doors and strike bells to signify the hours. The power comes from a water wheel occupying the lower part of the tower. Su Song has designed a device which stops the water wheel except for a brief spell, once every quarter of an hour, when the weight of the water (accumulated in vessels on the rim) is sufficient to trip a mechanism. The wheel, lurching forward, drives the machinery of the tower to the next stationary point in a continuing cycle. This device (which in Su Sungs tower must feel like a minor earthquake every time it slams the machinery into action) is an early example of an escapement a concept essential to mechanical clockwork. In any form of clock based on machinery, power must be delivered to the mechanism in intermittent bursts which can be precisely regulated. The rationing of power is the function of the escapement. The real birth of mechanical clockwork awaits a reliable version, developed in Europe in the 13th century. Meanwhile Su Sungs tower clock, ready for inspection by the emperor in 1094, is destroyed shortly afterwards by marauding barbarians from the north. Clockwork in Europe: 13th 14th century AD Europe at the end of the Middle Ages is busy trying to capture time. The underlying aim is as much astronomical (to reflect the movement of the heavenly bodies) as it is to do with the more mundane task of measuring everybodys day. But the attraction of that achievement is recognized too. A textbook on astronomy, written by Robert the Englishman in 1271, says that clockmakers are trying to make a wheel which will make one complete revolution in each day, but that they cannot quite perfect their work. What prevents them even beginning to perfect their work is the lack of an escapement. But a practical version of this dates from only a few years later. A working escapement is invented in about 1275. The process allows a toothed wheel to turn, one tooth at a time, by successive teeth catching against knobs projecting from an upright rod which oscillates back and forth. The speed of its oscillation is regulated by a horizontal bar (known as a foliot) attached to the top of the rod. The time taken in the foliots swing can be regulated by moving weights in or out on each arm. The function of the foliot is the same as that of the pendulum in modern clocks, but it is less efficient in that gravity is not helping it to oscillate. A very heavy weight is needed to power the clock, involving massive machinery and much friction. Nevertheless the foliot works to a degree acceptable at the time (a clock in the Middle Ages is counted a good timekeeper if it loses or gains only a quarter of an hour a day), and in the 14th century there are increasingly frequent references to clocks in European cities. A particularly elaborate one is built between 1348 and 1364 in Padua by Giovanni de Dondi, a professor of astronomy at the university who writes a detailed description of his clock. A 14th-century manuscript of his text has the earliest illustration of a clock mechanism with its escapement. The worlds three oldest surviving examples of clockwork date from the last years of the 14th century. The famous clock in Salisbury cathedral, installed by 1386 and still working today with its original mechanism, is a very plain piece of machinery. It has no face, being designed only to strike the hours. Striking is the main function of all early clocks (the word has links with the French cloche, meaning bell). In 1389 a great clock is installed above a bridge spanning a street in Rouen. It remains one of the famous sights of the city, though its glorious gilded dial is a later addition and its foliot has been replaced by a pendulum (in 1713). The historical distinction of the Rouen clock is that it is the first machine designed to strike the quarter-hours. In 1392 the bishop of Wells instals a clock in his cathedral. The bishop has previously been in Salisbury, and the same engineer seems to have made the new clock. It not only strikes the quarters. It steals a march on Rouen by having a dial, showing the movement of astronomical bodies. With escapements, chiming mechanisms and dials, clocks are now set to evolve into their more familiar selves. And the telling of time soon alters peoples perceptions of time itself. Hours, minutes and seconds are units which only come into existence as the ability to measure them develops. Domestic clocks: 15th century AD After the success of the clocks in Europes cathedrals in the late 14th century, and the introduction of the clock face in places such as Wells, kings and nobles naturally want this impressive technology at home. The first domestic clocks, in the early 15th century, are miniature versions of the cathedral clocks powered by hanging weights, regulated by escapements with a foliot, and showing the time to the great mans family and household by means of a single hand working its way round a 12-hour circuit on the clocks face. But before the middle of the 15th century a development of great significance occurs, in the form of a spring-driven mechanism. The earliest surviving spring-driven clock, now in the Science Museum in London, dates from about 1450. By that time clockmakers have not only discovered how to transmit power to the mechanism from a coiled spring. They have also devised a simple but effective solution to the problem inherent in a coiled spring which steadily loses power as it uncoils. The solution to this is the fusee. The fusee is a cone, bearing a spiral of grooves on its surface, which forms part of the axle driving the wheels of the clock mechanism. The length of gut linking the drum of the spring to the axle is wound round the fusee. It lies on the thinnest part of the cone when the spring is fully wound and reaches its broadest circumference by the time the spring is weak. Increased leverage exactly counteracts decreasing strength. These two devices, eliminating the need for weights, make possible clocks which stand on tables, clocks which can be taken from room to room, even clocks to accompany a traveller in a carriage. Eventually, most significant of all, they make possible the pocket watch. Watches: 16th 17th century AD The first watches, made in Nuremberg from about 1500, are spherical metal objects, about three inches in diameter, designed to hang on a ribbon round the neck. They derive from similar metal spheres used as pomanders, to hold aromatic herbs which will protect the wearer against disease or vile odours. The first watchmakers place their somewhat primitive mechanism inside cases of this sort. A single hand set into a flat section at the base makes its way round a dial marked with the division of twelve hours. For their first century and more, watches are worn outside the clothes and are regarded more as jewels than as useful instruments (a comment also on their timekeeping abilities). The best of them are exquisitely decorated in enamel. The spherical watch of this kind evolves in the late 17th century into the slimmer pocket watch, thanks largely to Christiaan Huygens. This distinguished Dutch physicist makes two important contributions to time-keeping the pendulum clock and the spiral balance spring. The pendulum clock: AD 1656-1657 Christiaan Huygens spends Christmas day, in the Hague in 1656, constructing a model of a clock on a new principle. The principle itself has been observed by Galileo, traditionally as a result of watching a lamp swing to and fro in the cathedral when he is a student in Pisa. Galileo later proves experimentally that a swinging suspended object takes the same time to complete each swing regardless of how far it travels. This consistency prompts Galileo to suggest that a pendulum might be useful in clocks. But no one has been able to apply that insight, until Huygens finds that his model works. A craftsman in the Hague makes the first full-scale clock on this principle for Huygens in 1657. But it is in England that the idea is taken up with the greatest enthusiasm. By 1600 London clockmakers have already developed the characteristic shape which makes best use of the new mechanism that of the longcase clock, more affectionately known as the grandfather clock. The pocket watch: AD 1675 Nineteen years after making his model of the pendulum clock, Huygens invents a device of equal significance in the development of the watch. It is the spiral balance, also known as the hairspring (an invention also claimed, less convincingly, by Robert Hooke). This very fine spring, coiled flat, controls the speed of oscillation of the balance wheel. For the first time it is possible to make a watch which is reasonably accurate and slim. Both elements are important, for the sober gentlemen of the late 17th century are less inclined than their ancestors to wear jewels round the neck. A watch which will keep the time and slip into a waistcoat pocket is what they require. Thomas Tompion, the greatest of English clock and watchmakers, is one of the first to apply the hairspring successfully in pocket watches (of which his workshop produces more than 6000 in his lifetime). The new accuracy of these instruments prompts an addition to the face of a watch that of the minute hand. The familiar watch face, with two concentric hands moving round a single dial, is at first considered confusing. There are experiments with several other arrangements of the hour and minute hand, before the design which has since been taken for granted is widely accepted. Chronometer: AD 1714-1766 Two centuries of ocean travel, since the first European voyages of discovery, have made it increasingly important for ships captains whether on naval or merchant business to be able to calculate their position accurately in any of the worlds seas. With the help of the simple and ancient astrolabe, the stars will reveal latitude. But on a revolving planet, longitude is harder. You need to know what time it is, before you can discover what place it is. The importance of this is made evident when the British government, in 1714, sets up a Board of Longitude and offers a massive  £20,000 prize to any inventor who can produce a clock capable of keeping accurate time at sea. The terms are demanding. To win the prize a chronometer (a solemnly scientific term for a clock, first used in a document of this year) must be sufficiently accurate to calculate longitude within thirty nautical miles at the end of a journey to the West Indies. This means that in rough seas, damp salty conditions and sudden changes of temperature the instrument must lose or gain not more than three seconds a day a level of accuracy unmatched at this time by the best clocks in the calmest London drawing rooms. The challenge appeals to John Harrison, at the time of the announcement a 21-year-old Lincolnshire carpenter with an interest in clocks. It is nearly sixty years before he wins the money. Luckily he lives long enough to collect it. By 1735 Harrison has built the first chronometer which he believes approaches the necessary standard. Over the next quarter-century he replaces it with three improved models before formally undergoing the governments test. His innovations include bearings which reduce friction, weighted balances interconnected by coiled springs to minimize the effects of movement, and the use of two metals in the balance spring to cope with expansion and contraction caused by changes of temperature. Harrisons first sea clock, in 1735, weighs 72 pounds and is 3 feet in all dimensions. His fourth, in 1759, is more like a watch circular and 5 inches in diameter. It is this machine which undergoes the sea trials. Harrison is now sixty-seven, so his son takes the chronometer on its test journey to Jamaica in 1761. It is five seconds slow at the end of the voyage. The government argues that this may be a fluke and offers Harrison only  £2500. After further trials, and the successful building of a Harrison chronometer by another craftsman (at the huge cost of  £450), the inventor is finally paid the full prize money in 1773. He has proved in 1761 what is possible, but his chronometer is an elaborate and expensive way of achieving the purpose. It is in France, where a large prize is also on offer from the Acadà ©mie des Sciences, that the practical chronometer of the future is developed. The French trial, open to all comers, takes place in 1766 on a voyage from Le Havre in a specially commissioned yacht, the Aurore. The only chronometer ready for the test is designed by Pierre Le Roy. At the end of forty-six days, his machine is accurate to within eight seconds. Le Roys timepiece is larger than Harrisons final model, but it is very much easier to construct. It provides the pattern of the future. With further modifications from various sources over the next two decades, the marine chronometer in its lasting form emerges before the end of the 18th century. Using it in combination with the sextant, explorers travelling the worlds oceans can now bring back accurate information of immense value to the makers of maps and charts. A millennium clock: AD 1746 In 1746 a French clockmaker, Monsieur Passemont (his first name is not known), completes a clock which is almost certainly the first in the world to be able to take account of a new millennium. Its dials can reveal the date of the month in any year up to AD 9999. It is a longcase clock, in an ornate baroque casing which conceals a mechanism consisting of more than 1000 interconnecting wheels and cogs. Their related movements, as they turn at their different speeds with each swing of the pendulum, are designed to cope with the complexities of the Julian calendar. Thus, for example, one large brass wheel has the responsibility of inserting February 29 in each leap year. This particular wheel takes four years to complete a single revolution. When it has come full circle, it pops in the extra day. (M. Passemont decides, however, not to grapple with Gregorian refinements; the absence of February 29 in 1700, 1800 and 1900 has had to be manually achieved.) Louis XV buys the clock in 1749, three years after its completion. It is still ticking away two and a half centuries later in the palace of Versailles. The minutiae of daily time-keeping are also adjusted by hand (the clock loses a minute a month), but Monsieur Passemonts masterpiece requires no assistance in making a significant change in the first digit of its year display from 1 to 2, at midnight on 31 December 1999.

The Nature of the Absurd How Brecht and Pirandello Express the Notion of Absurdity :: Essays Papers

The Nature of the Absurd How Brecht and Pirandello Express the Notion of Absurdity The word absurd can only be described by the Myth of Sisyphus, written by Albert Camus. It is a myth written about a man whose passion for life led him to his own torture. He was a man condemned by the gods to a life of dreadful punishment. His punishment was continuously rolling a rock to the top of a mountain. Each day the rock would roll its entire weight to the bottom, and Sisyphus would push it back to the top. Sisyphus is the absurd hero, as much through his passion for life as his torture. His whole life is pushing towards a goal that is accomplishing nothing. He lives a purposeless and powerless life. The tragic part of this story is that Sisyphus is conscious to this fact. He knows that every step he takes is one that lacks success. He knows as he is in the duration of his descent, as he thinks about the passions of his life, that he will once again face the sorrows of his hopeless labor when he faces the rock at the bottom of the hill. This is what makes the myth absurd. He can still be filled with happiness, especially on his descent, even though he is condemned to his fate. He never gives in to the circumstances and rises above. He can hold his head up and keep going, just as we do. Today we live our lives no less absurdly then Sisyphus did. We get up and work at the same tasks day after day. I have been going to school almost every day for the last 15 years. I have been following the structure that I am expected to follow, and accomplish little within each day. Sisyphus teaches us that we always have the ability to rise above our lot by laughing at our condition. Two pieces of literature that portray the notion of absurdity are Mother Courage by Bertolt Brecht and Six Characters in Search of an Author by Luigi Pirandello, because they both teach us lessons about our ability as humans to overcome our circumstances. Brecht wrote Mother Courage on the eve of World War II, and has a very pessimistic view of the world.

Explain the Principal Psychological Perspectives Essay

The behaviourist perspective is an idea that we can understand any type of behaviour by looking at what the person has learner. This includes personality traits such as shyness, confidence, optimism or pessimism. Behaviourist psychologists explain all human behaviour as resulting from experience. Two key psychologists are Pavlov and Skinner, although these two theorists believed that different processes were involved, they both explained all types of behaviour as being the result of learning. This is everything from shyness to aggression and happiness to depression. Classical conditioning was a theory developed by a Russian psychologist called Ivan Pavlov. He was working with dogs to investigate their digestive system. The dogs were attached to a harness and Pavlov attached monitors to their stomachs and mouths so he could measure the rate of salivation. He noticed that the dog began to salivate when someone entered the room with a bowl of food, but before the dog had eaten the food. Since salivation is a reflex response, this seemed unusual. Pavlov decided that the dog was salivating because it had learned to associate the person with the food. He then developed a theory. Food automatically led to the salivation response, since this response had not been learned, he called this an unconditioned response, which is a response that regularly occurs when an unconditioned stimulus is presented. As food automatically leads to this response, he called this an unconditioned stimulus, which is a stimulus that regularly and consistently leads to an automatic response. Pavlov then presented food at the same time as ringing a bell (neutral stimulus), to see if the dog would learn to associate the bell with the food. After several trials, the dog learned that the bell was associated with food and eventually it began to salivate only when the bell was rung and no food was presented. It therefore had learned the conditioned response of salivation to the conditioned stimulus, the conditioned response is a new, learned response to a previously neutral stimulus that mimics the response to the unconditioned stimulus. The Conditioned stimulus is a neutral stimulus that, when paired with the unconditioned stimulus, produces a conditioned response, just as the unconditioned response used to. Operant conditioning was a theory created by an American psychologist called Burrhus Frederic Skinner. Skinner worked mostly with rats and pigeons to discover key principles of learning new behaviours. He used a device called a Skinner box, the box contains a lever which, when pressed, releases a food pellet into the box which therefore should reinforce lever-pressing behaviour. When the rat is first placed in the box it will run around and sniff the various items and at some point it will press the lever, releasing the food pellet. When the rat has performed this action several times, it will learn that this behaviour is automatically followed by the release of a food pellet. Because the pellet is reinforcing, this consequence increases the probability of the behaviour being repeated. The two types of reinforcement are positive reinforcement and negative reinforcement. Positive reinforcement is when the consequence following a particular behaviour is experienced as desirable. Negative reinforcement is when behaviour results in a consequence that removes something unpleasant. Skinner tested the negative reinforcement by running a very low electrical current on the floor of the skinner box. The current would be de-activated if the rat pressed the lever. The lever pressing was therefore negatively reinforcing. Social learning theory: There are many influences on our behaviour, this comes from peers, siblings, parents, television, sports and celebrities. According to the social learning theory, role models are very important. The likelihood of imitating behaviours is strongly influenced by the way we perceive the person performing the behaviour. If we observe the behaviour of someone we admire, we are more likely to imitate their behaviour. For example, if someone such as Bradley wiggins recommends that we should wear a cycle helmet, we are much more likely to imitate this behaviour as we are closer to being like this admired model. But, if someone we look down on recommends that we do the same, we are much less likely to do so as we do not want to be perceived as the person we look down on. Certain attributes of a person determine whether the behaviour is more likely to be imitated, these attributes include; gender, similarity to ourselves, status, prestige, competence and fame. Our behaviour is also influenced by the presence of other, no matter how much we believe ourselves to be individuals. Culture is the shared values, norms, language, customs and practices of a group. It also refers to different sub-groups within society. It is important to understand how culture affects our behaviour in order to gain a full understanding of the people we encounter and those we work with. Watson found that the average amount of eye contact made varied between countries, with high degrees of eye contact being seen as insolent by some Africans and East Asians, whereas among Indians and Latin-Americans this was seen as desirable. The self-fulfilling prophecy is a concept in psychology that has an impact on the way we behave towards others and expect them to behave towards us. If we believe ourselves to be worthwhile, pleasant and likeable then we will almost certainly be polite and cheerful towards those we meet, therefore it will create a favourable impression. In response, those who come into contact with us perceive us favourably and behave in a positive way towards us, this results in our positive self-beliefs being confirmed. On the other hand, if we are angry and feel the whole world is against us, then we are likely to behave in a more aggressive way and therefore this is how we will be responded to, which will confirm our views of ourselves and the world. The Psychodynamic approach: This approach was created by an Austrian psychologist called Sigmund Freud. Freud was one of the earliest thinkers to bring to public attention the idea that we are not always aware of all aspects of ourselves. He said that we’re are aware of things in our conscious mind, but things like our memories, feelings and past experiences are locked up in a part of our mind called the unconscious. We can’t access the unconscious part of our minds but they leak out in dreams or through a slip of the tongue. Part of the unconscious that we can easily access he called the pre-conscious. This contains information that isn’t in the conscious part of our minds but can be easily retrieved. Freud believed that early experiences determine behaviours later in life. He developed the psychosexual theory, he believed we all go through several stages of psychosexual development. At each stage, the individuals libido is focused on a part of the body that is particularly relevant at that stage. If the needs are met for the developing child at each stage, it moves on to the next development stage. If there is a struggle or conflict, the individual becomes stuck at this stage. This results in certain personality traits, which are carried through into adulthood and which can explain behaviour in later life. The earliest stage is the ‘oral stage’, the focus here is on the mouth and consists of behaviours such as sucking, biting and licking. Freud believed that, either, the infant was weaned too early and would feel under-gratified and unsatisfied and would develop into a pessimistic sarcastic person. On the other hand, the infant was weaned too late and would develop a gullible personality and naively trust in others. This stage lasts from birth to approximately 18 months. If the infant passes through the oral stage without becoming stuck, the next stage is the ‘anal stage’, which lasts from approximately one to three years. The libido here is focused on aspects to do with potty training. If there is a battle with parents about potty training, with the child feeling forced to use the potty before they are ready. The child may rebel by retaining their faeces, therefore holding on to the control and withholding satisfaction from the parents. This is called ‘anally retentive’ and is associated with later personality traits such as obstinacy, miserliness and obsessive traits. The alternative is that the child is not given enough boundaries over potty training so they take pleasure in excretion and become a messy, creative, disorganised person. During the ages of four to five, a child passes through the ‘phallic stage’. Fixation at this stage is associated with anxiety and guilty feelings about sex and fear about castration for males. If this stage is not resolved, Freud suggests that a boy may become homosexual and a girl may become a lesbian. Between the ages of five to seven and the onset of puberty, a child enters the ‘latency stage’, it is not a developmental stage but is when the focus is on social pursuits such as sport, academic excellence and the development of friendships. The final stage is the ‘gential stage’, this begins at puberty. Freud believed that the less fixated a child has become during the earlier stages, the more easily this stage will be negotiated, resulting in the ability to form strong heterosexual relationships, with the ability to be warm and loving as well as receive love in a mature way. Another important feature of early experiences is the development of ego defence mechanisms. An ego is the part of the mind whose function it is to moderate the demands of the id and prevent the superego being too harsh. It operates on the reality principle. The use of a defence mechanism allows us to block out events that threaten to overwhelm us. Examples of ego defences are things such as repression which allows a person to forget an event such as a traumatic event. Regression is reverting to an earlier stage of development such as wetting the bed when gaining a new sibling despite never doing so before. Denial is pushing an event or emotion out of the conscious mind, such as denying that a loved one has died. Displacement is redirecting desires onto a safe object, such as taking your anger out on someone you love because of someone else giving you a hard time. Freud suggested that the mind is divided into three dynamic parts which he called the ‘psyche’. The ‘id’ is the part of the mind which is completely unconscious and exists at birth. It is focused on getting what is wants and has aggressive, sexual and loving instincts, such as ‘i want’. The ‘superego’ is a result of socialisation and consists of all the instructions, morals and values that are repeatedly reinforced when growing up. It consists of an internalisation of all the values of right and wrong we have been socialised to believe in, it is our conscience and represents a view of our ideal self. The main role of the superego is to subdue the activity of the id. The ego tries to balance the id and the superego. It is the rational part of the mind. Different behaviours can be understood by trying to infer which part of the psyche is dominant at any time. For example, a person who is submissive, guilty and always wanting to please others may have a very strong superego. A person who is impulsive, careless of other people’s feelings and does not care about the consequences of their actions will have a very strong id. A person who can be submissive but assertive when need be, who is able to think about other peoples needs but value their own can probably balance the id and superego. Eric Erikson was a psychologist who agreed with much of Freuds theory that we developed through a series of stages. Although, he believed these continued throughout our lifetime and were essentially social in nature. He believed that Freud put too much emphasis on desire and not enough on our need to be accepted by society and lead a meaningful life. Erikson suggested that we move through a series of psychosocial crises with a different social focus at each stage. The Humanistic perspective: Humanistic psychology looks at human experience from the viewpoint of an individual, it focuses on the idea of free will and that we are all capable of making our own choices. Maslow is an American psychologist who believed that we are all seeking to be the best we can both, spiritually, physically, emotionally and intellectually. He called this self-actualisation. He made a theory called the hierarchy of needs, which explains that every person requires certain basic needs to be met before they can reach the next level. Maslow believed that until our basic needs are met, we will focus on getting them met and not be able to progress further. When we are comfortable physically, we focus on our emotional needs such as self-esteem. When these needs are met we strive to self-actualise. Carl rogers was a psychologist who was interested in the concept of self. Self-concept refers to the way we view ourselves, this is physically and biologically, attributes such as being male or female, blonde or brunette, tall or short, as well as personality traits such as being kind, humble, assertive or hard-working. The self-concept is formed from an early age and children internalise other people’s judgements of them, which may become a part of their self-concept. Internalise is the way we take in information from the outside world and build into our sense of self. It then becomes part of our feelings, thoughts and beliefs about ourselves. If a child is told they’re silly, naughty and will come to no good, part of their self-aspect will contain these aspects. On the other hand, if a child is praised and encouraged to succeed, they will have positive self-concept. The cognitive/information processing perspective: Jean piaget was a Swiss psychologist who initially worked on measuring intelligence. He noticed that children on the same ages make the same mistakes in logic, no matter how bright they were. He came to the conclusion that cognition develops through a series of stages, each new stage building on the previous one. Birth to 1 Â ½ or 2 years ‘the sensorimotor stage’ – Learning to use senses and muscles – thinking without language. Babies are born with the ability to sense objects, they are also born with a range of reflexes such as the sucking reflex to enable them to feed. These reflexes lead to ‘motor actions’ controlling body muscles. The sensorimotor stage is a stage when thinking is limited to sensing objects and performing motor actions. Piaget believed that a baby would not have a working system for remembering and thinking about the world until they were about 18 months old. 2-7 years ‘the pre-operational stage’ – Pre-logical thinking in language but without understanding logic. Piaget believed that during this stage, children could not think in a logical way. Children can use words to communicate but cannot understand logical implications involved in language. Pre-operational children cannot properly understand how ideas like number, mass and volume really work. 7-11 years ‘the concrete operational stage’ – A stage where logical thinking is limited to practical situations. Children in the concrete operations stage can think logically provided the issues are concrete. In the concrete operational stage children may be able to understand simple logical puzzles. 11+ years ‘the formal operational stage’ – Thinking using logic and abstract thought processes – adult thinking. With formal logic, an adult can solve complex problems. This stage allows adolescents and adults to use abstract concepts to gain understanding of the world. Adults can think scientifically and think through complicated ideas in our head without having to see the concrete picture. George Kelly developed a psychological theory called the psychology of personal constructs. He saw the individual as a scientist, making predictions about the future, testing them and revising them according to new evidence. A construct is a way of construing reality and the environment. Kelly believed that we do not have to be constrained by our past history but can seek out new, alternative, more positive meanings. The biological perspective: Maturational theory – this theory holds that the effects of the environment are minimal. A child is born with a set of genetic instructions that are passed down from their parents. Their cognitive, physical and other developmental processes merely unfold over time, rather than being dependent on the environment to mature. It is a theory which states that development is due to nature not nurture. Arnold Gesell believed that development occurred according to a sequence of developmental processes. Development in the womb has a fixed set of stages; the heart begins to form first, along with a nervous system. Bones and muscles develop next and over time the organism develops into a fully functioning human being. As the child develops from birth, its genes allow it to develop gradually into the person they’re meant to be. Genes can affect behaviour in many ways. Many diseases such as Cystic fibrosis and Huntington’s disease are passed on through parents genes. Diseases such as these are genetically determined, regardless of environmental factors. Disorders that are not genetically determined, but where an individual’s genes may leave them with a vulnerability to developing the disorder are very common. The autonomic nervous system produces its effects through activation of nerve fibres throughout the nervous system, brain and body or by stimulating the release of hormones from endocrine glands. Hormones are biochemical substances that are release into the bloodstream and have a profound effect on target organs and behaviour. They are present in very small quantities and individual molecules have a very short life, so their effects quickly disappear if they are secreted continiously. There are a large number of hormones, such as, melatonin which acts on the brainstem sleep mechanisms to help synchronise the phases of sleep and activity. Testosterone, which may influence aggressiveness, and oxytocin which stimulates milk production and female orgasms.

Data Analysis And Discussion Science Fair

Daphnia died on day seven in trial two. In a pH of five the Daphnia survived for six day s In trial one and six days in trial two. Len the pH of twelve the Daphnia survived for five days in trial one and in trial two the Daphnia survived for six days. ; The Daphnia survived less than a week under the strong acids and bases because Daphnia can easily become stressed under different conditions like t he pHs.The water tanks had an increase in Compounds that form H+ ions in the water ankhs (acids; pH of three and five) and an increase Compounds that form OH ions (basis; pH of twelve) as our classed has learned about this in the biochemistry unit. The reason why people would care about our data results and experiment is t hat the Daphnia and the the different pHs are just a representation of what can happen in the real world as aquatic habitats and ecosystems can be critically impacted as different forms Of acids, such as acidic rain and bases and can kill not just Daphnia but also other aquatic organism due to human activity.As w as inform people how vital pH can affect an entire habitat and even ecosystem Our hypothesis was valid because we proved that testing Daphnia in a strong pH (three and five) and a strong acid (twelve) the survival rate of the Daphnia would drop, which did as the Daphnia continued to day from day to day as the e acids and bases caused it harm. The relationship between the Daphnia and the level of independent variable was seen as we put the Daphnia in different pHs and saw that died in different WA