The Weaving Contest Between Athena and Arachne

While Athena was a friend of Greek heroes, she wasnt so helpful to women. The story of the weaving contest between Arachne and Athena is one of the most familiar myths about Athena, and its central theme is also popular. Greek mythology repeatedly hammers home the danger of comparing oneself with a goddess. The theme appears in the story of Cupid and Psyche, where Aphrodite is offended. While ultimately there is a happy ending, to avert Aphrodites wrath, Psyches family abandons her to death. In the mythological story of Niobe, Artemis punishes the mortal mother for boasting that she is a more fortunate mother than Artemis mother, Leto: Artemis destroys all Niobes children. The punishment Athena inflicts on her capable, but the merely mortal victim is more direct. If Arachne wants to claim to be a better weaver than Athena, so be it. Thats all shell ever be good for. Arachne Suffers a Metamorphosis The Roman poet Ovid writes about the metamorphosis Arachne suffers in his work on transformations (Metamorphoses): One at the loom so excellently skilld,That to the Goddess she refusd to yield, ( Ovid, Metamorphoses VI) In the myth, Athena challenges Arachne to a weaving contest in order to prove herself. The expert crafts goddess Athena is favorably impressed with Arachnes weaving of divine debaucheries: This the bright Goddess passionately movd,With envy saw, yet inwardly approvd.The scene of heavnly guilt with haste she tore,Nor longer the affront with patience bore;A boxen shuttle in her hand she took,And more than once Arachnes forehead struck. Athena cant tolerate the affront to her pride, though, so she turns Arachne into a spider doomed to weave forever. From the unfortunate spider-woman comes the name for the 8-legged creatures: arachnids.

Performance of Cardboard Carton Forms Free Essays

PERFORMANCE OF CARDBOARD CARTON FORMS Abstract: Cardboard carton forms (void boxes) are commonly used to form the void space between the bottom of grade beams and slabs over expansive soils. However, other than laboratory compression tests and 100% humidity tests, there is little documentation for the actual performance of these boxes in place. This paper summarizes field tests done in an attempt to simulate actual conditions to answer the following questions: †¢ Do the boxes deteriorate at an acceptable rate? Does the wax coating or impregnation and a polyethylene vapor barrier affect deterioration? †¢ Will the boxes fail under heave conditions? Are trapezoidal boxes appropriate and do they perform in an acceptable manner? †¢ Which type of boxes are appropriate in each situation? †¢ What are some of the construction considerations necessary to insure proper function of the boxes? Two configurations of boxes were used: Vertical Cell and Diagonal Type II. We will write a custom essay sample on Performance of Cardboard Carton Forms or any similar topic only for you Order Now Initial Test 1 procedure: It was initially decided to pour a test slab over 4 sets of void boxes. Each box was 4 ft x 4ft x 8 in deep. Concrete was poured on top and all around each box to simulate actual conditions. Four 1 ft x 1 ft steel forms were placed on top of each box for the purpose of loading each box at different intervals to determine if they had deteriorated. All boxes for the first test were vertical cell. Each box was placed with different conditions: †¢ Void box with no poly anywhere †¢ Void box with poly wrapped all around †¢ Void box with poly on top only †¢ Void box with poly on bottom only Test set up with boxes and loading pads Placing concrete over boxes. The procedure was to pour the concrete and test the capacity of the boxes once a week to determine the rate of deterioration. Description of results: †¢ Week 1: Each box was loaded with 200 psf and no deflection was observed †¢ Week 2: Each box was loaded with 400 psf with no deflection †¢ Week 3: Each box was loaded with 400 psf with no deflection. The box with poly on bottom was flooded with water to accelerate deterioration †¢ Week 4: Each box was loaded with 400 psf. The box that had been flooded with water had 3/8† deflection. All the other boxes had no deflection †¢ Week 5: The test pad on the boxes with no poly and the one with poly on bottom were removed to view the boxes. It was discovered that the top of the cardboard had stuck to the concrete causing the cardboard to span across the opening thus giving erroneous information. Both of the boxes appeared to have significant strength but were destroyed in the removal process and could not be tested. †¢ Week 6: The two remaining boxes, the one with poly all around and the one with poly on top had the concrete removed to expose the boxes. The boxes were tested with over 400 psf and still had plenty of capacity with little deterioration. The box with poly wrapped all around had a little water in the box, maybe a cupful, but this did not deteriorate the box. The source of the water is unknown, possibly from when the adjacent box was flooded with water. III. Test 2 Procedure: 1. Two vertical cell boxes with no wax were buried in sand and uncovered after one week to view the rate of deterioration: The boxes and loaded with a 50 pound weight and they immediately. 2. A Vertical Cells beam box with wax and a Diagonal Type Beam Box with wax were buried in sand for one week. The buried boxes were tested by standing on them, there was nominal deflection which indicates the wax has a definite impact on the deterioration rate. 3. Two vertical boxes with wax were buried in sand for three weeks. One was completely covered in poly and the other had no poly. Both boxes showed no appreciable deterioration after three weeks. Since the boxes with no wax failed after one week under the same conditions, it is assumed that the wax and the poly significantly slow deterioration. IV. Test 3 Procedure: Two boxes, one diagonal type box and one vertical cells were wrapped in poly with a cup of water added to simulate a 100% humidity condition. The next day, the vertical box collapsed immediately. The Diagonal box did not collapse Two boxes with no wax were buried in sand Box after one week sitting 50 pound block in middle except on the sides. A box with a capacity of only 200 psf was tested and failed with normal construction loads and therefore, considered not acceptable. V. Summary of Observations From Tests 1-3: 1. Testing the boxes from the top gives unsatisfactory results. . The bottom of the boxes deteriorate first and destroys the glue between the verticals and the bottom on the Vertical boxes. 3. Covering the bottom of the boxes with poly (the top of the sub-grade) slows down or stops the deterioration of the boxes. 4. There is not enough moisture coming out of the slab to deteriorate the boxes. 5. The Diagonal boxes are very weak on the sides and very s trong in the middle. 6. The Diagonal boxes deteriorate slower because of the wax impregnation. 7. Boxes with no wax seem to deteriorate at an acceptable rate. 8. Covering the entire box with poly stopped any deterioration. VI. Initial Conclusions: 1. Boxes should be tested from the bottom, not the top. Since expansive soil heaves, the boxes should be tested from the bottom. The initial deterioration is on the bottom and therefore, the box is weaker when loaded from the bottom. 2. Boxes under the slab should be constructed with no wax if possible. 3. Diagonal Type boxes which are wax impregnated and have strong vertical and diagonal members deteriorate much slower and they possibly stay too strong under slabs. . New tests were devised using waterbeds to load the void boxes from the bottom. Refer to the description of waterbed tests. VII. Test 4: Water Bed Test It was determined by the initial testing procedure that the void boxes need to be tested in place from the bottom. A 25 ft x 37 ft test slab was built with one of the purposes to test the void boxes and another purpose was to test analytical methods of designing flat slabs for houses. Fi ve waterbeds were placed below the sub-grade under the void boxes. One was queen size and four were twin size. Three of the waterbeds had Vertical Boxes with no wax on top of them, one had fully waxed Vertical beam boxes and one had a Diagonal slab box. The purpose of using the waterbeds was an attempt to simulate actual heaving of soil and to test an in place situation on an actual project. The waterbed was buried in the subgrade while constructing the slab. After a period of time, the waterbeds were filled to see if the void boxes collapse or if pressure is exerted on the slab indicating full capacity boxes without deterioration. Steel rods were welded to plates which rested on top of the sub-grade above the waterbed. This rod was sleeved through the slab with pvc pipe. The purpose of these indicator rods was that when the waterbed filled up, if the top of the rod raised up also, the void boxes collapsed. VIII. Results The Water Bed Test: Three weeks after the slab was poured, the waterbeds were filled. All five waterbed indicators rose quickly and to a maximum height of 7 inches. The void boxes were 8 inches deep at these points, therefore, the boxes were fully collapsed. No deflection or distress was observed in the slab therefore, the test was successful. Three of the test were done with a subgrade that had ? nch rain on it the night before placing the concrete. The waxed boxes were placed in a very dry, sandy subgrade in over 100 degree weather, trying to simulate the driest of conditions. Observation holes which were 4 inch in diameter were located to monitor the deterioration of the void boxes. It was observed that for approximately two weeks after the slab was poured, the humidity was very high in the void space with a great deal of heat generated. Slab indicators showing the â€Å"heaving† of the soil and therefore the failure of the boxes IX. Conclusions From Water Bed Tests: 1. After three weeks all boxes had lost enough strength to protect the slab from pressure. 2. After three weeks, even boxes which are waxed will fail adequately. All boxes tested were of the vertical cell type. 3. This test was very successful and the use of waterbeds is an excellent method to test void boxes. X. Test 5: Effect of Integral Retainers and Earth Forming: As published in the Fall, 1997 Proceedings of the Texas Section of The American Society of Civil Engineers, Mr. Robert Davis, P. E. tested trapezoidal void boxes to determine if they fail under construction loads. His conclusion was that trapezoidal boxes of the diagonal type fail when used under a grade beam. We have also seen this in the field and agree with the findings. However, some engineers still use the integral concrete retainers. This test was to determine if earth formed grade beams with trapezoidal boxes and the integral concrete retainers are appropriate. A testing apparatus was constructed to test different box and retainer configurations. The test was constructed to push up from the bottom with highly expansive fat clays below the simulated grade beam. Hydraulic jacks were used under the expansive soil to simulate the heaving of expansive soil. A weight equivalent to 200 psf was applied to the grade beam. The friction of the soil plus the bearing on the end of the concrete retainer caused the box to freely move upward. XI. Project Experience-Performance of Boxes under Grade Beams About the time of our tests, a construction project was completed using diagonal type beam boxes under formed concrete beams. Approximately 1000 feet of grade beams were set up in dry weather and normal conditions. The concrete was placed at inch slump and vibrated. After the forms were removed, it was discovered that approximately 20 percent of the void boxes failed. The contractor was instructed to chip off all excess concrete that invaded the void space which took approximately three days to accomplish. The next 1000 feet of grade beams were set up using vertical cell boxes under the same conditions with the same contractor. No boxes failed on this seco nd pour. View of failed boxes XII. Suggested Procedure for Filling Gaps The weakest point of failure for void boxes is on the ends and especially at the intersection with piers. After experimenting with several methods, I have found that common expandable foam as found in hardware stores works excellent in filling gaps and providing a tight form during construction. I recommend all gaps and holes between boxes and at the intersection with piers be filled with this foam. The cost is nominal for a typical project. Expandable Foam used to fill gaps XIII. Final Conclusions and Recommendations 1. All boxes must have moisture in order to deteriorate properly. Therefore, the boxes should not be completely wrapped in poly which is a common practice of contractors. . The moisture from the subgrade plus the hydration of the concrete appear to provide adequate deterioration of the boxes. The void boxes appear to fail from the bottom to the top. 3. A moisture barrier (polyethylene) should not be used below the boxes because it does not allow deterioration from the subgrade below. 4. A moisture barrier (poly) on top of the boxes may affect the hydration of the concrete a nd therefore the humidity in the void space. This barrier also increases the probability of excessive shrinkage cracks and therefore should not be used for that reason. The question of if this barrier is necessary to prevent moisture migration through the slab and thus affect any floor covering is not a subject of this paper. However, this author has not encountered this problem and therefore, does not recommend placing a vapor barrier on top of the boxes. 5. A layer of ? inch thick masonite should be used on top of all boxes under a slab area. This distributes the concentrated loads due to the rebar bolsters and construction loads. It is our experience that the cardboard cover sheets supplied by the box manufacturers are not adequate for the construction loads. Masonite of less thickness will curl and is not recommended. Plywood or OSB board is not recommended because of termites. 6. Trapezoidal boxes should not be used because the concrete retainers transfer forces from the expanding soil to the concrete beam above. There is also evidence that these boxes fail during construction if they are of the diagonal cell configuration. 7. Expandable foam should be used to fill all gaps between boxes and at pier locations. REFERENCE: www. foundationperformance. org AUTHOR NAME _ DAVID K. ISBELL, P. E. How to cite Performance of Cardboard Carton Forms, Essay examples

Price Elascity of Demand free essay sample

Price Elascity of Demand BY vtc901ee The price elasticity of demand (PED) is a measure of how much the quantity demanded of a good responds to a change in price of the good (Mankiw 2007, p. 90). It is a form of measure to determine how willing consumers are to move away from the good as the price of the good rises. Most of the time, there are factors that determines the PED, such as availability of close substitutes, necessities versus luxuries, definition of the market and time horizon. In order to calculate the PED, a formula is calculated using the percentage change in the quantity demanded divided y the percentage change in the price. Elastic demand that has the coefficient of greater than 1 suggests that there would be a significant change in quantity demanded when there is a little change in price while inelastic demand has a coefficient of less than one, which has a little change in quantity demanded even when there is a significant change in price. Unitary demand occurs when there is a coefficient of exactly one and there is an exact change in quantity demanded in proportion to the change in price (Bolotta et al. 2002). There are two ways to calculate the PED. Firstly, it is called the point method or also nown as geometrical method (DEISU 2008). Under this method, we measure the elasticity of demand at any point of a demand curve using the formula, Elasticity at any point on the straight line can be calculated using the point method provided that the demand line is linear. The better way to calculate the PED is by using the midpoint method, which is to calculate the PED between two points on a demand curve by averaging the 2 initial and final points chosen. The midpoint approach averages the prices and quantities demanded, thus arriving at an average elasticity estimate for the range of values covered on the demand curve. The formula is, The product that is chosen to explain the theory of PED is rice. Rice is one of the perfect examples of inelastic demand applied in todays world, especially in Malaysia. There was an interesting finding made by Nik Mustapha and other researchers, where they find that rice tends to be inelastic, showing that rice has already occupied a special position in Malaysian diet as it is a staple food among the population (FEMI-JPM 2008). Other countries in Asia are also affected by the demand for rice. In Thailand, the export price elasticity of demand for rice is ranged -1. 2 and -1. 9, which shows that it is an inelastic demand (FEMI-JPM 2008). The graph would be similar to Figure 3, whereby it has a steeper slope. This indicates that the consumer would pay at almost any price set in the market for the good as it is a necessity in food for them. The PED of the rice is important in terms of their pricing decisions as the total revenue can change along the demand curve, and this in return depends on the PED. In this case, rice is considered to be inelastic, and for all inelastic demands, an increase in price will have an increase in total revenue (Mankiw 2007, p. 95). However, this is also crucial in determining the maximum profit that can be made using the PED. If all the farmers have good harvest, a large drop in price is necessary to encourage consumers to use the additional grain (Ingrimayne. com) this will cause the farmers income to decrease, thus it is important to know the PED of the rice. For instance, if the quantity of rice increases by 20%, it means that there could be a decrease of price by 40%. In explaining on how the tax being imposed by the government can affects the production of rice, a fully labelled market diagram for rice (inelastic demand) is illustrated. Consumer surplus is the extra amount consumers are willing to pay from the ctual price whereas producer surplus is the amount sellers are paid for a good minus the sellers cost of providing it (Mankiw 2007, pp. 139-144). Before the government impose tax on rice, consumer surplus and producer surplus are determined by equilibrium of price in the market. By imposing the tax on rice, the quantity of rice sold falls and there is a wedge between the price that buyers pay and the price that sellers receive. Both surpluses are reduced because there is tax revenue imposed by the government, resulting in a deadweight loss, a condition where a fall in surplus exceeds tax revenue, a form of market distortion (Mankiw 007, p. 162). These tax revenues are classified as government revenue. Government revenue may differ depending on the size of the tax, as different tax size generates different tax revenue. Since an inelastic demand decreases the quantity produced by a little, it can be assumed that the deadweight loss is also smaller, causing the tax revenue to increase slightly, as shown in Figure 10. Next, we will discuss the tax burden of the production of rice. Tax incidence is the distribution of tax burden among the participants in the market. In the rice market, taxes imposed on the buyers and the sellers are the same no matter whether the tax s charged on buyers or sellers, but the only difference is that who will send the money to the government (Mankiw 2007, pp. 24-127). To prove that, the following are the examples when a tax is charged on either buyers or sellers: The overall social welfare will be clearly shown once the effects of tax have on the quantity and price of the product, as the change in the total welfare decreases the consumer surplus and producer surplus, and usually exceeds the tax revenue raised maximised as there is deadweight loss incurred in the process of taxation, causing the quantity of goods decrease

The Research and Use of Stem Cell Embryos

Free Essays on The Rise And Fall Of The Bauhaus

â€Å"Mechanized work is lifeless, proper only to the lifeless machine†¦ The solution depends on a change in the individual’s attitude toward his work, not on the betterment of his outward circumstances.† (Gropius) Walter Gropius changed art and architecture forever the first day in April of the year 1919. (01) This was the time in which he felt an obligation to converge both the arts and crafts with the new industrial methods. He accomplished this when he took over the Art Academy in Weimer Germany established by the Grand Duke of Sachsen-Weimar. (02) During the next fourteen years, the school saw two more directors that may have had different ideals, but still maintained the original goals of the Bauhaus. (04) Its foundation was the first to achieve man’s effort to come to terms with technology and art. Though it may have been short lived, the Bauhaus did more than any other organization in the 19th and 20th centuries to reconcile man and his man-made environment. In Germany during post World War I there were many disputes as to what was to be done in art and architecture. The theories were on the extreme sides of the spectrum, where on the one side were people who could not understand that the pre-war world was dead; on the other side they were determined to learn from the catastrophe. For these people the Bauhaus was a means to greatness, while the traditionalists were disgusted at its very existence. In Germany, and the rest of Europe for that matter, they were confident in their pursuit of the Exprssionism style during the early 20th century. Essentially, this was Romanticism, which is the experimentation of the artists expressing their individual views. At the beginning of October 1907 a hundred architects, designers, factory owners, and friends of art met in Munich. Together they founded the 'Deutscher Werkbund'. Its aim was to improve the form and quality of utility wares. Werkbund had partly got its influences from ... Free Essays on The Rise And Fall Of The Bauhaus Free Essays on The Rise And Fall Of The Bauhaus â€Å"Mechanized work is lifeless, proper only to the lifeless machine†¦ The solution depends on a change in the individual’s attitude toward his work, not on the betterment of his outward circumstances.† (Gropius) Walter Gropius changed art and architecture forever the first day in April of the year 1919. (01) This was the time in which he felt an obligation to converge both the arts and crafts with the new industrial methods. He accomplished this when he took over the Art Academy in Weimer Germany established by the Grand Duke of Sachsen-Weimar. (02) During the next fourteen years, the school saw two more directors that may have had different ideals, but still maintained the original goals of the Bauhaus. (04) Its foundation was the first to achieve man’s effort to come to terms with technology and art. Though it may have been short lived, the Bauhaus did more than any other organization in the 19th and 20th centuries to reconcile man and his man-made environment. In Germany during post World War I there were many disputes as to what was to be done in art and architecture. The theories were on the extreme sides of the spectrum, where on the one side were people who could not understand that the pre-war world was dead; on the other side they were determined to learn from the catastrophe. For these people the Bauhaus was a means to greatness, while the traditionalists were disgusted at its very existence. In Germany, and the rest of Europe for that matter, they were confident in their pursuit of the Exprssionism style during the early 20th century. Essentially, this was Romanticism, which is the experimentation of the artists expressing their individual views. At the beginning of October 1907 a hundred architects, designers, factory owners, and friends of art met in Munich. Together they founded the 'Deutscher Werkbund'. Its aim was to improve the form and quality of utility wares. Werkbund had partly got its influences from ...

Cause and effect Essay Example | Topics and Well Written Essays - 750 words - 1

Cause and effect - Essay Example There is something dark about the human psyche which even science cannot fully explain. It is a well-known fact that every person has a different level of endurance, and if pushed further than that the inner animal emerges and even the gentlest of human beings can commit the most heinous of sins, for instance, murder. Classical authors of time past have also tried to capture this facet of human personality in their writings. The concept of ‘The Other’ in The Picture of Dorian Grey and the foiling of Bertha and Jane in Jane Eyre are startling. These show very clearly that there is a part in our psyche which has not evolved over time; it has the instincts of a monster. It is that part which is taboo and which we hide from the polite society in fear of being rejected. Now the question is how masterfully you control that part of yourself. We cannot give it free reign, we cannot ignore it, so what do we do? As a result, a new genre of literature and movies has emerged: Gothic or Horror. Gothic or horror movies help us exercise our inner self without being obvious or hurting others. There is something about horror movies which makes one feel awed. I remember the first horror movie I saw was ‘Resident Evil’ when I was eleven years old. ... This made me really think about the real psyche of humans, later. When I read ‘The Lord of The Flies’, this feeling came back. In extreme circumstances, the luxury of our so called sophisticated exterior is shattered and we begin to think like animals. Horror movies make us relish the emotions of horror and terror. It is as if we are taking our shot of this other-worldly reality. The pleasure mixed with horror we feel does not mean that we enjoy doing this to others; it simply means that the boring and monotonous life is left behind and we feel as if we are with the protagonist racing through zombies, clashing swords with vampires and killing our enemies. Humans are emotional beings, who want an outlet to all the natural emotions which have to be felt to live a normal life, but are unable to because nothing extraordinary is happening in their lives and in this normal world. We try to escape from it all and feed our inner demons by watching horror movies or playing gory v ideo games. All the pounding, the blood and the struggle uses up our adrenaline and makes us more composed and controlled in our very day life. I have asked myself after growing up what it was about ‘Twilight’ that made me, for a short span of time, almost worship the idea of a vampire and werewolf? In real life a blood drinking fanged person, or a half-man, half-wolf would be far from sexy but would be downright ugly, disgusting and scary. Then I understood that it was my idea of an adventure, experiencing something powerful and terrifying which I would have been unable to achieve in real life, and it filled that part of my psyche which is called ‘The Other’. Hence, humans crave horror movies for various reasons, the most prominent being satiating the hidden beast

Analysis of Media Relations Literature review Example | Topics and Well Written Essays - 1000 words

Analysis of Media Relations - Literature review Example As the day unfolded and more was learned, different angles began to emerge as the media competed for the best and most relevant information. All three online editions of these papers, after publishing the details and timelines, next mentioned the whereabouts of and statements of PM Tony Blair, who was at a G8 summit: 'The Prime minister Tony Blair said before leaving the G8 summit "It is particularly barbaric that this has happened on a day when people are meeting to try to help the problems of poverty in Africa and the long term problems of climate change and the environment"' (The Independent, 7 July 2005). An interview with Mr. Jack Straw informed us that the 'blasts, which bore some resemblance to the Madrid train bombings in March 2004, had the "hallmarks of an Al-Qaida related attack"' (Sarah Left, Mark Oliver, and agencies, Guardian, 7/7/05. 22.45 update). Amongst reports of the bombings came scattered news of the G8 summit and whether or not Mr. Blair would return to London. This was the common thread through all of the media research, first the reports of the bombings, then the estimated number of deaths followed by estimations of injuries and next to the focus on Mr. Blair. Throughout the day of 7 July 2005, local newspapers continued with a stream of updated information, mostly con... ut this event held more horror because of the sequence of the four bombings occurring so closely, reminding Londoners and even visiting Americans of the 11 September 2001 attacks on the World Trade Center. When a threat such as this occurs, it is critical that the people in the immediate area are informed of what is happening and what they should do. In this case, especially in the tube bombings, there was no one in the moments following the explosions. People had to take it upon themselves to escape the danger zone and find out what was happening. At the same time, people who have access to on-demand news want to know the very same things, for different reasons. This is where the media are responsible for both the qualitative and quantitative content of their reports, On a day such as this, however, any news seemed worthy of being reported, with the purpose of bringing the public out of panic or shock then posting emergency telephone numbers and searching for the reassurance that the authorities were doing everything they could. Â