PAPER Topics

... Because of this lack of recognition the treatment of their problems are mishandled which creates a very difficult and confusing childhood for these children. (McCreight, 1997). Even when fetal alcohol effects are recognized there is limited treatment. There are hardly any programs in schools and society to help the children maintain normalcy. It was not until 1973 that the deficit was first acknowledged and given a name. Nearly thirty years later we are still having problems diagnosing and treating this incurable syndrome. The most obvious characteristics of those with FAS are facial deficits which include a short upturned nose, a small head, a broad and flattened face, a large s ...

... go through two main phases, the analysis of a jogger wearing a standard walking prosthesis and computer simulation of the flexing of the knee on this walking prosthesis. They had to measure rotation, weight bearing, moments, and the stress of the joints acting on this limb. After the mechanical actions were mapped out they had to use many mathematical equations to spring force and spring stiffness. All of this was accomplished and the conclusion was that by varying the placement and orientation of the spring, the moment arm values could be adjusted in an attempt to linearize the spring stiffness. is also used in the study of sports actions, such as the motion of throwing a baseball. ...

... cane sugar, is the form in which sugar is transported in plants from the photosynthetic cells to other parts of the plant body. Sucrose is composed of the monosaccharides glucose and fructose. In the synthesis of a disaccharide molecule from two monosaccharides, a molecule of water is removed in the process of forming the new bond between the two monosaccharides. This type of chemical reaction, which occurs in the synthesis of most organic polymers from their subunits, is known as condensation. When a disaccharide is split into its monosaccharide units, which happens when it is used as an energy source, the molecule of water is added again. This process is called hydrolysis. Polysaccha ...

... increase in the infiltration of water from the topsoil to the groundwater, due to rainfall or irrigation, can result in a dramatic rise in groundwater pressure and watertable levels. The trees of the open forests are now replaced by shallow-rooted crops and pastures which absorb far less water than the native trees. Those trees had been massive water pumps, sucking up moisture from deep underground and putting it back into the atmosphere through the evaporation from their leaves. With those pumps gone, excess rainfall accumulates underground and watertables rise to the surface, bringing ancient sediments of salt with them, often in heavy concentrations. Once exposed to the air and sun, ...

... bright stars in a row in the winter evening, you might realise, "Oh! That's part of Orion!" Suddenly, the rest of the constellation falls into place and you can declare: "There's Betelgeuse in Orion's left shoulder and Rigel is his foot." And once you recognise Orion, you can remember that Orion's Hunting Dogs are always nearby. Where did the come from? OK, so we know the are helpful for remembering the stars, but why would people want to do that (besides an astronomer)? After all, I said at the beginning that farmers invented the . Why did they do that? Was it for some religious purpose? Yes and no. Around the world, farmers know that for most crops, you plant in the spring and harvest i ...

... dangerous and is probobly armed. Salmonella Typhi has been on the loose for many years and was cuased a lot of havoc and done a lot of damage over the years. Typhoid fever affects 17 million people worldwide every year, with approximately 600,000 deaths. To protect yourself from typhoid fever, aviod risky food and drinks and get vaccinated aginst typhoid fever, and wash your hands carefully a lot to make sure you have not touched something infected with Salmonella Typhi. Here are some ways to keep a watch out for Typhoid, at a resturant, make sure the chef uses fresh products and that all the employees wash there hands after using the bathroom. You can not tell if the food you are eating ...

... dust that was to become the earth. The gas expanded, and some of it flowed away into space. The dust that remained behind then collected together because of gravity. Although the shrinking earth generated a lot of heat, most of this heat was lost into space. Therefore, the original earth was most likely solid, not molten. This hypothesis was developed by a scientest, Harold C. Urey in 1952. It is also known as the Urey's hypothesis. He showed that methane, ammonia, and water are the stable forms of carbon, nitrogen, and oxygen if an excess of hydrogen is present. Cosmic dust clouds, from which the earth formed, contained a great excess of hydrogen. ...

... object depends on the speed, size, shape, and density of the object. The larger the surface area of the object, the greater the amount of air resistance on it. This is why feathers, leaves, and sheets of paper fall more slowly than pennies, acorns, and crumpled balls of paper. There is another legend that states that when Newton was lying against a tree in an orchard, he was struck on the head by an apple. He wondered what provided the acceleration for the apple to fall to the ground. Was this a force of the earth on the apple? If so, then the apple must exert a force on the earth according to Newton’s law of action/reaction forces. Newton applied this theory unto the planets, w ...

... trap the sun's heat, warming the planet sufficiently for life to exist. There is, however, one problem: human activity has dramatically increased the amount of greenhouse gases in the atmosphere. Over the last two centuries the concentration of greenhouse gases in the atmosphere has increased quite significantly, mainly as a result of burning fossil fuels for industrial purposes. For example, atmospheric concentrations of carbon dioxide have increased from 280-285 parts per million in 1800 to 350 parts per million today. Currently the concentration of CO2 is rising by 0.4% per year. Methane has increased from about 750 parts per billion to 1700 parts per billion over the past 200 years, an ...

... nation's land area. In the United States, whose 5,500 large dams make it the second most dammed country in the world, we have stopped building large dams, and are now spending great amounts of money trying to fix the problems created by existing dams. Although the impacts of large dams have been well documented for some time now, in case after case, new ones are proposed whose environmental impacts are downplayed or even ignored. A suvey showed that most dams were built without the consideration of downstream effects, even when these impacts could be predicted to cause massive coastal erosion, pollution, and other problems. Reducing the flow of water from a river changes the lan ...