The car industry: Dilemmas

The car industry: Dilemmas 1. Introduction The car industry faces a crucial weight problem resulting from increasing customer demands in terms of safety and performance. This trend leads to fully equipped cars in all classes getting more luxurious and comfortable. To escape from this vicious circle car manufacturers are forced to take action in the form of lightweight concepts. Light metals are seen as a promising opportunity to decrease the weight of a car. An increasing use of metals such as aluminium in the automotive industry shows that there is still large scope for improvements. Using aluminium car body panel is just a representative example of weight-saving effort did by car manufacturers. Aluminium has some properties that make it ideal for car bodies. The strength of aluminium frame and extruded sections is approximately the same as that of steel. However, the rigidity of aluminium is lower than that of steel. That is partly due to the modulus of elasticity of aluminium that is just one-third that of steel. (1) The effect is that aluminium has a higher elastic distortion when exposed to the same force as steel. Therefore the simple replacement of steel by aluminium engine is not an optimal solution as it does not exploit the whole scope of the advantages of aluminium. New ways need to be pursued to make full use of aluminiums advantages as a light weight material, which means it can be supplied in various aluminium alloys. Although the requirement for improved corrosion resistance and light-weighting are significant factors for use low-carbon steels in the manufacture of cars, (1) this traditional material still has some advantage such as higher strength and lower price. Many kinds of steel and aluminium alloys can be found commercially using in producing car body panels. Each material has its own characteristic. 1.1 Steel Steel is known as an alloy consisting mostly of iron, with carbon content between 0.2% and 2.1% by weight. (3) One of the main factors contributing to the utility of steels is the broad range of mechanical properties which can be obtained by heat treatment. For example, easy formability and good ductility may be necessary during fabrication of a part. Once formed very high strength part may be needed in service. Both of these material properties are achievable from the same material. All steels can be softened to some degree by annealing. The degree of softening depends on the chemical composition of the particular steel. (4) Annealing is achieved by heating to and holding at a suitable temperature followed by cooling at a suitable rate. Similarly, steels can be hardened or strengthened. This can be accomplished by cold working, heat treating, or an appropriate combination of these. Cold working is the technique used to strengthen both low carbon low alloyed steels and highly alloyed austenitic stainless steels. Only reasonably high strength levels can be attained in the carbon low alloyed steels, but the highly alloyed austenitic stainless steels can be cold worked to rather high strength levels. (5) Most steels are commonly supplied to specified minimum strength levels. Heat treating is the primary technique for strengthening the remainder of the steels. Some common heat treatment of steels is listed below: Martensitic hardening Pearlitic transformation Austempering Age hardening The recyclability of steel is brilliant and it is economically advantageous to do so. It is cheaper to recycle steel than to mine iron ore and manipulate it through the production process to form new steel. (6) 1.2 Aluminium-based alloys In the Earths crust, aluminium is the most abundant (8.3% by weight) metallic element and the third most abundant of all elements (after oxygen and silicon). Because of its strong affinity to oxygen, however, it is almost never found in the elemental state; instead it is found in oxides or silicates. Aluminium was isolated in small quantities early in the 19th century and it remained an expensive curiosity until 1886 when discovery of an economic method for its electrolyric extraction. Since then, the emergence of aluminium as a practical, commercial metal has relied primarily on the availability of electricity at economic prices. Aluminium is obtained from bauxite which is the name given to ores containing 40-60% hydrated alumina together with impurities such as iron oxides, silica and titania. Two steps are needed in the production of aluminium. First, alumina is extracted from bauxite. Second, use electrolysis to dissolve the alumina in molten cryolite and a typical electrolyte contains 80-90% of this compound and 2-8 % alumina together with additives such as aluminium and calcium fluorides. (7) Because the cryolite has a melting point as high as 1010?, the electrolysis of it needs a temperature of about 960? which wastes lots of energy and makes the cost of producing aluminium relatively higher. However, a new methodCambridge FFC which comes from the production of titanium, was introduced to China. This method use a NaCl-CaCl2 electrolyte which has a lower melting point of 520?, even lower than the melting point 660? of aluminium. By using alumina and liquid aluminium as negative electrode, the expanded reacting area on negative electrode allows the electrolysis of alumina to happen, which can theoretically reduce the electrolysis temperature to the melting point 660?. This research opens a new chapter of production of aluminium and will dramatically reduce the cost of producing aluminium some day. Generally speaking, about 85% of aluminium is used for wrought products which are produced from cast ingots. (8) The structures of alloys are greatly changed by the various working operations and thermal treatments. Each individual class of alloys behaves differently, with composition and structure dictation the working characteristics and subsequent properties that are developed. Casting aluminium alloys are also important parts of Al. Apart from light weight, the special advantages of aluminium alloys for castings are the relatively low melting temperatures, negligible solubility for all gases except hydrogen, and the good surface finish that is usually achieved with final products. Most of the cast alloys also show good fluidity and composition can be selected with solidification range appropriate to particular applications. (1) Casting alloys normally have mechanical properties that are inferior to wrought products and these properties also tend to be much more variable throughout a given component. 2 Study of possible alloy using for producing car body 2.1 Steel At present, low carbon steel sheet is most commonly used in car body production. Low-carbon steel has good machinability. Its strength and rigidity can fully meet the car body strength requirements, as well to meet the body welding requirements. 2.1.1 Low carbon steel Steel with low carbon content has properties similar to iron. Low carbon steel is the steel containing approximately 0.05-0.15% carbon. Content influences the yield strength of steel because it is a BCC structure and carbon atoms fit into the interstitial crystal lattice sites. (3) These carbon atoms reduce the mobility of dislocations. But it has a hardening effect. Because the interstitial carbon atoms cause some of the iron BCC lattice cells to distort, a high enough stress level must be applied in order for the dislocations to move. Low carbon is one of the most common steel and it is relatively cheap than most other steels. However, the strength is relatively lower, which can be seen in appendix. 2.1.2 Higher strength steel In order to reduce the weight of an automobile, it is absolutely essential to reduce the thickness of the sheet steel and compensate for loss of strength by using higher strength steel sheets. For inner panels, though a rather substantial amount of high strength steel is used, the percentage use is a little lower than in the outer panel due to stiffness limitation and insufficient formability. (9) However, the overall use of high strength steel is estimated to increase further more. The problems in press performance of high strength steel are wrinkles, surface deflection and springback, fracture especially in stretch flanging and galling on the forming tool. Until now, the average level of strength used widely is at most 400 MPa but in the near future the high strength steel with over 400 MPa may be used for the reduction of weight and in this case the forming difficulty will increase further more. (5) The thickness of a panel sheet decreases as a result of application of higher stre ngth steel. Many kinds of microstructural hardened high strength steel sheet are applied by automobile producers. Ø Dual phase steel Dual phase steel show lower yield strength compared with other types of steel having the same tensile strength because of mobile dislocations existing in the vicinity of the boundary of ferritic and martensitic phases. So presents low yield ratios. And thats why its elastic recovery after forming work is small and shape fixability is good. As it also shows larger elongation than precipitation hardened steel sheets and fatigue resistance. (3) Ø Trip steel sheet Transformation induced plasticity steel is also becoming an ideal material for car body panels. It has meta-stable austenite transformable into martensite contained up to 30% in bainite or ferrite and bainite matrix. Commercial Trip sheets have simple C-Si-Mn series chemical compositions. The simpler chemical compositions are made viable by stabilizing the austenite phase through distribution of alloy elements in the two phase region and concentration of carbon into austenite during bainite transformation. (4) 2.2 Aluminium-based alloy Pure aluminium cannot be applied to normal passenger car due to softness. Moreover, surface damages during stamping and handling are often subjected to subsequent surface hand finishing. This additional operation on the panel is usually inevitable. In contrast to pure aluminium, aluminium alloys contain solute additions which can markedly affect grain structures and particularly the microstructures within the grains. This in turn strongly influences the responses of alloys to working and heat treatment. Both crystal structure and microstructure influence mechanical properties. Slip is inhibited by grain boundaries, which are disordered regions, (and so small grains improve strength). Slip can also be made difficult by dispersing particles of another phase throughout the matrix. This indicates the typical hardening mechanism of aluminium. (9) There are some kinds of wrought aluminium alloys typically used for car body. 2.2.1 Aluminium Manganese Alloys 3xxx This series of alloys is non heat-treatable. The addition of approximately 1% manganese increases the strength by approximately 10 15% compared with 1200, without any major loss in ductility. This non-heat treatable alloy generally finds a wide application where greater strength is required without any major loss in corrosion. The addition of manganese to the chemical composition creates phases like (Mn,Fe)Al6 or (Mn,Fe)3SiAl12 that can be revealed by a solution of 10% of phosphoric acid. The grain structure obtained by work hardening or by annealing is usually revealed by anodisation. (8) 3103 is typically used for car body in the automobile industry. The composition of 3103 alluminium is 0.7% Fe, 1.5% Mn and some others. 2.2.2 Aluminium Magnesium Alloys 5xxx This series of alloys is non heat-treatable and exhibits the best combination of high strength with resistance to corrosion. This series also exhibits good weldability but when the Mg level exceed 3% there is a tendency for stress corrosion resistance to be reduced, dependent on the temper used and temperature of operation. (1) Magnesium is largely soluble in aluminum compared to the other elements, but the content in excess can appear as eutectic Mg2Al3. After cold rolling and annealing they can be found at the grain boundaries or after cold working they can precipitate on deformation bands. In both cases the structure can be revealed by an etching of 10% H3PO4. At the same time as Cr is a frequent additive in this series, Cr2Mg3Al18 may appear as a fine dispersoid. (8) 5182 can be used as car body panel. The composition of 5182 alluminium is 4.1% Mg, 0.4% Mn and some others. 2.2.3 Aluminium Magnesium Silicon Alloys 6xxx This group of heat-treatable alloys uses a combination of magnesium and silicon (magnesium Silicide) to render it heat-treatable. These alloys find their greatest strength, combined with good corrosion resistance, ease of formability and excellent ability to be anodised. This family takes the main advantages from the strengthening due to the precipitation of Mg2Si. So the etching will reveal the iron rich phases like Fe3SiAl12, Fe2Si2Al9 that are insoluble and the coarse precipitates or the excess soluble precipitates (0.5%HF). (8) Typical alloys 6009 in this group are used for car bodies. The composition of 6009 aluminium is Si 1.1%, Mg 0.6 %, Mn 0.4% and some others. 3 Study of competition between steel and Al Automobiles today are over 63% iron and steel by weight. (10) With rising energy and environmental concerns, as well as increases the performance of the car, vehicle light-weighting continues to be a prominent concern for vehicle manufacturers. At the present, more and more aluminium alloys are introduced to automobile industry because the aluminium alloys can normally meet the requirement but is only half weight of steel. However, both the traditional steel car and aluminium have their advantages or disadvantages on aspects of manufacturing, safety, repairability, cost, recyclability, and environmental protection. 3.1 Manufacturing Aluminium parts can be more complicated in their design because the high number of design solutions likes the castings available in nearly any shape. One casting can replace a complex part consisting of several steel panels. Consequently a reduction of parts up to 50% is feasible. (1) This again makes design, construction and production easier as fewer parts need to be dealt with in any stage of the design and manufacturing process. Aluminium car body has fewer parts lead to fewer tools and fixtures, which makes manufacturing easily and therefore saving working spaces and expenses. Because the sheets can tear easily, low elongation and yield limits of aluminium alloys make it difficult for stamping. This has to be taken into account when designing and building car bodies. Also a higher resilience of the sheets causes difficulties in keeping the tolerances during stamping for individual parts and therefore for the whole car body. (11) Furthermore, it is difficult to keep the body tolerances after welding processes since aluminium extrusions and cast sections behave unpredictably when subjected to uneven heat influence. The heat expansion of aluminium is higher than steel, so all fixtures need to be built more solidly and stable to cope with the higher forces. Extensive pickle treatment is necessary to create a weldable surface for aluminium car body. Also the finish of the surface for the paint shop is costly and requires a lot of time and knowledge since the sheets tend to get scratched more easily than equivalent steel panels and the surface of the sheets is liable to form waves. (12) The 6xxx series of aluminium alloys which has been used a lot for the car body requires heat treatment to achieve the demanded strength. The drying process in the paint shop is not sufficient as the conventional temperatures are not high enough. Hence, an additional heat treatment line needs to be installed to heat the car bodies up to 210Â °C for 30 min to harden the aluminium alloys. (13) This cannot be done in advance of manufacturing as it would influence the welding processes negatively. When using aluminium alloy as car body material, contact corrosion plays a much more crucial role as steel accelerates the corrosion of aluminium than using steel body. So that screws or other parts made of steel need to be coated. Otherwise holes in the car body are unavoidable when exposed to moisture. (7) 3.2 Repairability and safety aspects Nowadays, Crash tests have aroused the publics attention since occupant safety is a feature that is receiving considerable public attention. Automobile companies even promote car safety as a leading aspect in their advertising campaigns. Additionally, insurance companies set great store by repairability of cars as they cause a significant part of their costs. In some countries the expenditure per car for repairing certain types of damage is assessed and taken into account when the car is being classified for insurance. (15) In approximately 5% of all accidents the frame structure of a car is damaged. (2) This can be crucial if casting parts or extrusions are concerned as they cannot be reformed properly. They need to be replaced in sections or as a whole dependent on the severity of the accident. Cast aluminium sections especially are liable to develop cracks and consequently need to be examined carefully. Additionally, a completely different approach to repairing damage forces dealers to train their mechanics in the appropriate techniques. In particular aluminium shielded arc welding requires accuracy, practice and the appropriate equipment but not steel. This becomes a problem especially for small dealers as they cannot afford the necessary equipment or staff. (12) Also, tools must not be mixed up with steel tools to avoid corrosion caused by steel particles in the aluminium panels. A separate set of tools for aluminium is mandatory to fully avoid these effects. (14) However, the properties of aluminium offer several advantages to steel. Tubular aluminium sections crumple in the ideal way when subjected to impacts. They develop a crumple pattern that can absorb more energy than equivalent steel elements. Consequently with half the weight of steel an aluminium structural member provides the same safety. (15) 3.3 Cost It is obvious that aluminium is more expensive to manufacture than steel. The costs of a sophisticated aluminium car body are many times larger than of an ordinary steel body. This can be especially crucial when being applied to small cars as the margin there is lower than at luxury cars. Higher material costs, a more sophisticated handling of aluminium parts in comparison to steel and some alloys need heat treatment to achieve the required strength, are the main drawbacks. (9) However, the use of aluminium causes lower investments for tooling due to the fact that stamped steel parts are replaced by extrusions which cause costs only a fraction of the costs required to manufacture stamping tools. This is especially interesting for low volume series as the tooling costs here have a relatively high influence on the unit costs. Additionally, punch riveting and clinching consume less energy than spot welding and will cause lower energy costs. But the development of high volume technology for welding, riveting and bonding is a crucial issue that has kept car manufacturers from producing all-aluminium car bodies as it is accompanied by high initial investment for research, development and design. (15) 3.4 Recyclability Recycling is likely to become more important in the future as governments force industry to design fully recyclable products just as is an increasing customer awareness in terms of environmental protection and hence a growing demand for eco-friendly products. To preserve the quality of the recycled material the different alloys must not be mixed up. This is especially crucial for the production of extrusions and sheets out of recycling aluminium alloys as they have lower tolerance levels of impurities than steel. Additionally, they can only be recovered if they are not mixed with cast parts. (6) Therefore, joined aluminium alloys panels with different alloys cause problems. Also panels that are joined with steel parts like rivets make recycling problematic since steel parts need to be removed to keep the number of foreign substances low. (6) This becomes more difficult as aluminium cannot be magnetically separated from other wastes. In order to recycle aluminium only a fraction of the original energy consumption is needed, even less than for recycling steel. 3.5 Environmental protection The environmental issues of different materials can be assessed by a comparison of the energy household of an aluminium and steel-made car during production and over their whole lives. Only having regard to all processes that cause energy consumption during production and operating life can an accurate result be given of the eco-friendliness of a car. It includes material cycles and the amounts of energy needed to produce and maintain a car during operating life time, including fuel. (15) If primary material is used, aluminium starts with a drawback of an additional energy consumption during production. Compared with steel, far higher amounts of energy are needed to produce lightweight metals like aluminium. For illustration, a car could achieve a weight reduction of 20 kg by the intensive use of aluminium alloys body other than the steel one. The additional energy consumed could be compensated after 3500 miles. After having covered this distance, the energy comparison works in favour of aluminium. A further comparison can be made in terms of carbon dioxide emissions. If primary aluminium is used it takes 60000 miles until the lighter aluminium auto has compensated the higher CO2 emission during production. However, when the proportion of recycled, secondary aluminium exceeds 75% the CO2 emission household is positive for aluminium from the first instance. (1) 4 Summary Considering the energy and environmental issues, using light weight metal for car bodies will be the trends in the near future. However, the traditional steel products still have the advantage of price and easy for manufacturing. Apart from luxuries cars already using light metal bodies, steel car bodies still take a large part of auto body market for it cheaper price and relatively better mechanical properties.

Church And State :: essays research papers fc

Church and State The theory of evolution is at odds with the views of many religions, and many people want to allow a religious view of creationism to be taught in the public school system. The foundation of evolution is based upon the belief that the origin of all ordered complex systems, including living creatures, can be explained by natural laws without the initiation or intervention of God. A person who believes in the biblical model of creation is viewed by some non- believers as a naive, narrow-minded religious fanatic who is not willing to look at the observable evidence with an open mind. Because the evolutionary idea of origins has been so widely accepted by the scientific community, many people have reasoned that the creation model should be completely rejected without fairly examining its claims. Even many Christians who have deep trust and faith in the Bible have never really understood the claims of the creation account (McLean 11). Over the past several years, a great deal of controversy surrounding the creation-evolution issue has been generated by scientists who have based their claims on the creation model and have been willing to let their reputations stand. Creationists have openly requested that when the discussion of origins occurs in the public school system, both the model of creation and evolution be presented side by side. Initially, scientists and educators who have accepted the theory of evolution without question were reluctant to pay any serious attention to creationism; however, it has now become apparent that substantial numbers of people are taking creationism seriously. Many evolutionists view this trend as a serious threat to the advancement of science and have vowed to do everything in their power to stop the teaching of creation in the public school system. Most evolutionists now view creationism as nothing more than a particular version of fundamentalist Christianity with no valid scientific content. One hundred-fifty years ago such a theory for the origin and history of the earth and life would have been termed absurd. Today, however, those who reject the idea of random evolutionary processes being responsible for designing life and shaping the geological features of the earth are termed religious, unscientific fanatics. Today, throughout the industrialized world, the moment children are able to respond to their environment, they are constantly bombarded with the doctrine of evolution. Faith in the biblical concept of creation by the hand of God is ridiculed and rejected by the secular system of education. Humanistic thinking widely accepts evolution as fact, even though "The all-too frequent picture of evolution as a progression from ameba to man, is, and always has been, utterly

You Get Stronger While Facing Difficulties

Our society is consistently changing. Different generations of people may have different kinds of life. Since my mother and I grew in different environments, we may have different set of values. I have had interview with my mother who grew up in an environment which is different from mine, and I found that our personal history, sense of cultural and social history are very different. Although she grew up in a relatively poor environment, she still succeeds due to her hard work. My mother was born in Hong Kong. She has two brothers and two sisters. At the time when she was a child, Hong Kong was not a rich city.The majority of people were poor. In my mother's family, since there are five children, they did not have sufficient income to maintain their lives. In this case, my mother needed to get a part-time Job after school in order to reduce the family financial burden. According to my mother, she always worked till 11 pm every day. She added † [This was really very hard. ] At t hat time, there were only a few ways to entertain. When my mother had spear time, she usually listened to the radio. She always said that Refortifies † [At that time I was bored. I could only listen to the radio when I had time. When comparing to her, I grew up in an environment which had many kinds of entertainment. Watching television, playing computer games and surfing the Internet are major types of activities that we do after school. Since Hong Kong is richer when compared to the past, most of the kids do not need to get part-time Jobs. These show that we grew up in different environment. Obviously, my mother faced more difficulties than me. Besides that, my mother thought that she was like living in a reign country. In terms of race, more than 90% of Hong Kong people are Chinese.However, since Hong Kong was a British colony before 1997, our national identity was not clear. According to my mother, every time she traveled to another place, she had to say her nationality wa s British, although her race is Chinese. She always said -3–t%-o [It strange. ] She added m, was in a place where the majority of the populations are Chinese. However, this place was ruled by another country. I was like living in foreign country. ] Luckily, since the majority of the populations were Chinese, my mother could still participate in a home country traditions. Clammed. L could still celebrate Chinese festivals such as Lunar New Year; I could also eat Chinese food everywhere. ]According to my mother, racism problem in Hong Kong still existed when she was young, although it was not serious. â€Å"she said. [People usually thought that White people were more superior. ] Apart from that, before 1997, Hong Kong was a British colony in which English was the only official language in the city. According to my mother, all the subjects at school were aught in English, [l have to read English book every day because all the textbooks were in English. She added, tiff, [In thi s case, I needed to learn an additional language other than Chinese. ] On the other hand, Chinese songs were very common. My mother quite enjoyed listening to Chinese songs. She said there were local Cantonese songs and Mandarin songs from Taiwan. When compared, nowadays the importance of English in Hong Kong has declined. There are more and more high schools use Chinese as medium of instruction. In other words, nowadays Hong Kong is more likely to be a Chinese city. In terms of culture, now it is â€Å"easier† to live in Hong Kong than before.Although my mother faced some cultural difficulties before, she tried her best to deal with it. Therefore, she can have a better life nowadays. Last but not least, my mother faced a lot of social problem when she was a child. She really concerned about social issues when she was a child. She said † [l am not a recent immigrant; I was born in Hong Kong. I should be more concern about social issues. ] According to my mother, there w ere many social problems. For example, at the time when she was a child, the irruption problem was quite serious.My mother said that the police department was the most corrupted department in the government. â€Å"Г*, † she claimed. [At that time, the majority of people hated police very much. ] Furthermore, the housing problem in Hong Kong was also very serious. My mother said, † [At that time, many people lived in squatter areas. ] She added, [l was comparatively luckier because I could live in public housing estate. ] When compared, due to the establishment of Independent Commission Against Corruption (IAC) in 1974, at the present, the corruption problem has been greatly improved.Besides that, since Hong Kong people are richer than before, they can live in tall buildings instead of living in squatter areas. Although my mother did not live in a good environment, she did not give up, so she can succeeds and have a better life at present. In conclusion, the growing environment of my mother and me are really different. She grew up in a relatively difficult and poor environment. Although she faced many problems, she did not give up. Working hard to solve all the problems that she faced, now she can have a better life. This positive attitude should be learned.

Definition and Examples of Complement Clauses

Definition and Examples of Complement Clauses In English grammar, a complement clause is a  subordinate clause that serves to complete the meaning of a noun or verb in a sentence. Also known as a complement phrase (abbreviated as CP). Complement clauses are generally introduced by subordinating conjunctions (also known as complementizers) and contain the typical elements of clauses: a verb (always), a subject (usually), and direct and indirect objects (sometimes). Observations and Examples A  complement clause is  a clause which is used as the complement of some other word (typically as the complement of a verb, adjective or noun). Thus, in a sentence such as He never expected that she would come, the clause that she would come serves as the complement of the verb expected, and so is a complement clause.(Andrew Radford,  Syntax: A Minimalist Introduction. Cambridge University Press, 1997)Complement Clauses as Noun ClausesComplement clauses can be that-clauses, wh-clauses, ing-clauses or infinitive clauses. The most common type is a complement clause following a verb. . . . In versions of grammar that use the concept of complement clause, it largely or entirely replaces the concept of nominal clause (or noun clause) referring to a clause that can occur in positions where noun phrases occur. For example, in Id like to carry on, the infinitive complement clause is the object of the main clause, filling a position where a noun phrase could occur.(Geoffrey N. Leech, A Glossary of English Grammar. Edinburgh University Press, 2006) Types of Complement ClausesRecently, linguists working in the influential theory known as generative grammar have used the term complement to refer to variously closely related kinds of subordinate clause, namely:Subordinate clauses which on their own serve as the direct object of verbs such as believe, tell, say, know, and understand; the subordinate clauses are the complements of these verbs.Subordinate clauses which modify various nouns such as story, rumour,  and fact, and adjectives such as proud, happy, and sad; the subordinate clauses are the complements of these nouns and adjectives.Subordinate clauses which on their own act as the subject of sentences with such predicates as be a pity, be a nuisance, be unfortunate, seem, and happen. These clauses are called subject complements or subject complement clauses.. . . Sometimes the term complement clause is extended to the adverbial type of subordinate clause as well.(James R. Hurford, Grammar: A Students Guide. Cambridge Unive rsity Press, 1994) Examples- You may call me Bob. From now on, I am Bob. I can assure you that Bob is quite proficient at electronic data manipulation. Without question one of the worlds finest.(Ted Dekker, Heavens Wager. WestBow Press, 2000)- Imagine that Frank is a fan of his towns soccer club. He always wears the same shirt when he watches his club play. He believes that they will win if he puts on the shirt at just the right time before the game starts.(Joshua James Kassner,  Rwanda and the Moral Obligation of Humanitarian Intervention. Edinburgh University Press, 2013)- She said she was approaching 40, and I couldnt help wondering from what direction.(Bob Hope)- The fact that the adult American Negro female emerges a formidable character is often met with amazement, distaste and even belligerence.(Maya Angelou, I Know Why the Caged Bird Sings, 1969)

Evaluate the role of intuition in different areas of knowledge Essays

Evaluate the role of intuition in different areas of knowledge Essays Evaluate the role of intuition in different areas of knowledge Essay Evaluate the role of intuition in different areas of knowledge Essay Intuition is the hunch to turn left at a crossroads when youre lost or the gut feeling that you should choose the third queue in the supermarket because you feel that its the best one. There are those who argue that intuition is in fact not a feeling and but a reasonable and logical choice that your subconscious makes for you. For example when a fireman is inside a burning building and has two seconds to decide if he should turn right or left. He thinks that its his intuition telling him to go left when it could be argued that his subconscious has made a logical calculation of his surroundings and decided that its safest to go left. It could also be argued that intuition is an instinct. If attacked by a bear, your intuition and instinct become the same; both telling you to get away as soon as possible. This is also a decision and action based on reason. Reason tells you that if you that the bear is bigger, more lethal than you and possibly dangerous and so logically it would be better if you left. But then again the fear that you experience when seeing a bear is an emotion and fear usually makes you want to get away. So is intuition based on reason or emotion? Intuition is used in the different areas of knowledge. For example mathematics is an area of knowledge where logic and reason are frequently used. Laws of physics and mathematics, like Newtons three laws and law of exponents, are generally accepted and believed to be true as they have yet to be disproved. They have complex formulas and equations as proof to back up the laws. As most of the worlds population is not very well trained and educated in mathematics and physics we believe in our authorities. In all the mathematicians and physicists who claim that these universally accepted laws are correct. Thus by calculating something we use faith (in our authorities) and the logic that we have been taught in math class to solve a mathematical/physical problem. Thus it would seem that there is no place for intuition in the area of mathematics and natural sciences (in this case physics). However, many of the students in Higher Level Mathematics claim that they often use intuition to help solve difficult problems. That they make a guess because it feels right and hope that it will lead to a correct answer. Sometimes this hunch works, most often not. But a wrong answer is not a necessary failure. You always need to start somewhere and thats where intuition helps. It becomes the hypothesis and if incorrect you learn that this was not the way to solve the problem. Now you have one choice less and are one step closer to the correct answer. Some might say that as mathematics is seen as an area of knowledge where reason and logic often rule then arts could be seen as an area of knowledge where reason and logic isnt used as often and perception senses and emotion rule instead. Art is very personal and quite often requires a lot of imagination. It is also creative and a way to express oneself. Because of this art is emotional, it creates emotional reactions by viewers/listeners/readers and shows the feelings and personality of the artist himself. The artist often writes for example a poem about how the artist feels. Every poem is new and different and so the artist always has to start from scratch which requires intuition. You have to start somewhere and intuition helps to find the right way to go. Intuition in art is also when walking down a street and a melody starts forming in your head or the words to a poem. That is why people who write or compose a lot usually carry with them a small notebook so they can write down all the brilliant ideas that they suddenly come up with. Does art always require intuition and is art always emotional? When painting a portrait of someone or scenery the artist has a model that needs to be copied. This doesnt require imagination nor creativity as there is nothing to be invented or made up from scratch because there already is a correct answer, a model to follow. This then makes art reasonable and logical as all that is required of the artist is talent and technique to know how to copy something successfully. Therefore in some cases art does indeed lack intuition and emotion. This also applies when making decisions based on experience. For example if a song producer wants to add some extra flavour to his latest rap-song he knows that a few more yeahs! or increasing the base will do the trick then his decision is based on experience and not intuition. Our former Theory of Knowledge teacher told us that it is impossible for the human mind to create or think of something that doesnt already exist. This would then mean that we could literary not think outside the box as this would be beyond our brain capacity. If this is true then every form of art is an attempt to copy something that already exists which according to what was said earlier doesnt need intuition. Thus it could be said that there is in fact no place for intuition in art. The counter argument would be to say that even though the artist is trying to copy the feeling misery by writing a poem about it he needs a place to start and a way to express his feelings on the subject and to do this he needs his intuition. So that, when writing his poem on misery he would use intuition to find the right words for his poem.

Management stress Essay Example | Topics and Well Written Essays - 500 words

Management stress - Essay Example During this stage of stress response, the brain will send an emergency signal to other body parts letting them know of the dangerous situation the individual is facing. The individual can either choose a fight or flight reaction. For example, during a bank robbery, an individual may decide to ‘fight’ the robbers or run away from the scene ‘flight’. In an organizational setting, this phase does not usually affect the performance of an employee. This means that too little stress is unlikely to have an effect on the productivity of employees (Quick, Wright, Adkins, Nelson & Quick, 2013). At this stage, an employee will attempt to resist the stressor. This process is initiated so that the individual can regain balance. It is at this stage that the body puts up a fight, and the human body is likely to achieve its maximum activity levels. The body digs deep into its reserve, and an individual usually feels under pressure and is usually very anxious. According to the Yerkes-Dodson Law curve, it is at this stage that employees in an organization reach their peak performance. This goes to prove that people will usually work their best when under pressure. However, at this stage an individual’s body is usually very weak and is vulnerable to diseases due to a weakened immune system. At this stage, the human body is no longer able to cope with the stress and the body’s adaptive mechanisms collapse. At this stage, the stress is too much, and the body is usually unable to fight with the stressor. At this phase, an individual is usually tired, broken and exhausted. An individual is likely to have sleeping problems, raised blood pressure, digestive issues and is also at a higher risk of suffering from heart disease. Additionally, the individual may suffer from serious conditions like memory loss, mental illness and impaired judgment. The individual may break down due to feelings of

ECONOMIC SOCIOLOGY Essay Example | Topics and Well Written Essays - 2500 words

ECONOMIC SOCIOLOGY - Essay Example (2002, p. 163) argued that micro-level theories of social psychology are helpful. Another perspective that was offered was from Ridgeway and Correll (2004, p. 510) who argued that cultural beliefs about gender are the key components that maintain and change the gender system. The International Trade Union Confederation reported in 2009 (p. 16), that the gender mean pay gap in the United Kingdom is 19.8% in favour of males. In the United States, based on the National Educational Longitudinal Survey data, Bobbitt-Zeher found that college-educated men in their mid-20s earn on average about $7,000 more than college-educated women on an annual basis (2007, p. 1). Bobbitt-Zeher (2007, p. 1) pointed out that the gap is still substantial at $4,400 per annum if the men and women have the same or similar credentials, scores on tests, specialization, and degrees from similar colleges. Bobbitt-Zeher elaborated (2007, p. 1) that â€Å"gender differences in fields of study continue to disadvantage women.† Further, â€Å"gender differences in work-related factors are more important than are educational differences for understanding income inequality among young workers† (Bobbitt-Zeher 2007, p. 1). Bobbit-Zeher cited that several studies have articulated t hat education may have realized an important role in reducing gender wage gaps over the past few decades. According to Bobbitt-Zeher (2007, p. 3), the following are the sources of gender-income gap: (1) the tendency for certain college majors to be associated with gender; (2) alleged link between standardized tests and gender; (3) the link between gender and amount of education; and (4) the selectivity of the college attended. Cohen and Huffman (2007, p. 681) reported that women representation in management can be a source of gender-wage gap at the workplace. Cohen and Huffman (2007, p. 681) made the conclusion based on statistical results from three-level hierarchical models on data drawn from the