Assignments Assignment Example | Topics and Well Written Essays - 250 words - 1

Assignments - Assignment Example TCP pesticide and other chemicals that may be harmful to both humans and animals within the environment and the impact of human activity in Soian River. While the TCP chemical helps in increasing farm produce in Lamar, it leads to respiratory diseases. The chemical should be banned in the region and other environment friendly pesticides used to boost agriculture. Human activities such as generation of hydroelectric power and creating dams along Soian River are good for the countries but will not be sustainable in to the future because they affect aquatic life. These human activities have affected lives of Red Cranes and Trout in the river. Any move to regulate on these issues is likely to encounter resistance from the states. States that have projects such as power generation, dams, or even extensive use of TCP will reject regulation. The most important idea, however, is that while all these human activities are beneficial today, they are not sustainable in the end. The states should use a gradual approach to regulate these issues. The treaty should outline structures for dealing with agricultural chemicals that are harmful to both people and animals as well as putting forward steps that will be taken to reduce human activity in the river over an agreed period. There should be intense lobbying to convince each state that environmental issues are of great priority and should be addressed objectively (Ferrey

Applications of Engineering Materials in Aerospace

Applications of Engineering Materials in Aerospace In this project I will discuss in details the applications of engineering materials in Engineering and its many application in the Aerospace and Formula 1. Materials are key in engineering because the correct materials are needed to meet the needed of the environment that they are meant for use in. In aerospace the materials that are generally used are thing such as: titanium, aluminium, carbon fibre. For example titanium and titanium alloys are used in aerospace engine combustion chamber which can be in the region of 2000C in some instances. Application of materials in Formula 1 Formula 1 is a motor racing category in which the cars can reach extremely high straight line speed and cornering speeds. For them to be able to reach to be able to reach such high speeds and operate in such conditions, the cars much be built from extremely light and strong materials such as carbon fibre and titanium. Carbon-fiber-reinforced polymer is used extensively in high-end automobile racing .The high cost of carbon fiber is mitigated by the materials unsurpassed strength-to-weight ratio, and low weight is essential for high-performance automobile racing. Race-car manufacturers have also developed methods to give carbon fiber pieces strength in a certain direction, making it strong in a load-bearing direction, but weak in directions where little or no load would be placed on the member. Materials such as titanium are also used a lot throughout a formula one engine because of the fact that it is extremely strong and light which allows it the engine to operate at extreme engine speeds such as 20000RPM for a sustained period of time without resulting in engine failure. A material called Inconel is used in the construction of the cars exhaust pipe because of its ability to hold its shape and continue to work as in intended at high temperatures in the region of 900-1000 C . Quite often in formula the rule makers often dictate what materials are permissible in the construction in various parts of the car and what materials are forbidden. This often due to trying to stop the teams from using very expensive materials in the development of the cars, which would send spending sky high. Materials such as beryllium alloys where banned in the use of the construction of the engine as a cost cutting measure. When with the FIA, the regulators of the sport, top teams with big budget s quite easily end up spending in the region of  £250 million a year on the development of the car. The chassis of the car also knows as the monocoque because of how it’s constructed as one piece. The chassis of the car is also sometime referred to as the â€Å"survival cell† because it has been designed to cocoon the driver in the event of crash and protect them from injury. The chassis also has to be very light as well so that it is possible to reach highest possible acceleration which gives the teams a possible advantage over their rivals. Another reason for a strong chassis in grand prix racing is that the chassis is also used as mounting point for the engine and the gearbox. The reason this is done again to save as much weight as possible whilst maximizing the structural integrity of the car. The material that can do all then things is carbon fiber which was first used in formula 1 when a British engineer called John Barnard built the McLaren MP4-1 chassis from carbon fiber. The material should just how strong it when McLaren driver John Watson had a heavy crash at the Italian grand prix at the Monza circuit , and managed to get out without any major injuries. The car did go to win 6 grand Prix because it was significantly ahead of its rivals in terms of the materials used in its construction which gave it huge advantage over the rest of the field considering that this versatile and super strong was introduced in 1983. Limitations and recyclability of the materials used in Formula 1 and that The limitations of many of the materials is that that most of it is very expensive because of the nature of the materials which puts allot of strain on the smaller teams with smaller budgets especially since 60% of the car is constructed from carbon fibre. Carbon fibre is a recyclable material but the problem with it is that the more it is recycled the more of its structural integrity it losses, like plastic, and therefore the quality of it goes down significantly which means that it can only be used for things such as road paving fillers. The metal parts of the car such as the cars such as the car’s engine and internal parts of the gearbox, such as the gear ratio, gear forks and the main shaft, can all be very easily recycled without the loss of the strength or quality of the material. Materials such as titanium and steel alloyed which are used for internal parts of the gearbox and also the engines major castings ( cylinder heads , crankshaft, engine block , camshafts) can be melted down and made back into gear ratio or many other things such as aerospace quality components which are found in aircraft fuselage or deep within the engines. Material applications in the Aerospace Industry Material research, development and application are absolutely vital in the aerospace industry because through the development of materials that planes are flying higher, faster and safer than ever before. Through the use of ultra light and ultra strong materials such as GLARE (Glass Laminate Aluminum Reinforced Epoxy). GLARE is a Glass Laminate Aluminum Reinforced Epoxy FML, composed of several very thin layers of metal (usually aluminum) interspersed with layers of glass-fiber pre-peg, bonded together with a matrix such as epoxy. The uni-directional pre-preg layers may be aligned in different directions to suit the predicted stress conditions. Although GLARE is a composite material, [1] its material properties and fabrication are very similar to bulk aluminum metal sheets. It has far less in common with composite structures when it comes to design, manufacture, inspection or maintenance. GLARE parts are constructed and repaired using mostly conventional metal material techniques. With the application of such materials in aerospace, it has allowed engineers to create bigger planes which are also very economical at the same time. the use of fatigue resistant materials such as GLARE and carbon fibre also reduce maintenance of aircraft because they don’t need to be checked for cracks as often as planes which are made from aluminium and aluminium alloys. Which are plane from aluminium are more prone to what is known as â€Å"metal fatigue†. Metal fatigue happens as a result of continuous loading from the years of pressurisation cycles that a plane goes when it increases and decreases in altitude. Many aerospace companies such Rolls Royce have an in-house material science research department which spend millions of pounds in research with the hope that it will lead to better quality materials which will be able to function correctly in extreme environments such within the core of a high bypass turbo fan engine, where the temperatures can be in excess of 2000C. The materials are used for this are usually titanium alloys because of its ability to stay in its original shape. If you look closely at the picture of the turbine blade bellow , it can be observed that many small holes have been very precisely drilled in and this is to aid the cooling of the blade and stop in from melting and ultimately causing an entire engine failure. Another reason why such ultra light materials are used is because, the engineers want to minimize the mass of the components as much as possible because this reduces the inertia of the part and this will result in better response time from the engine ,wh en the pilots engine increase power to the engine. Lighter components also reduce the fuel consumption of and the engine which is especially important considering the fuel prices as they continue to rise. This is something that airlines will pay extra close attention to because they are always looking to minimize their cost to increase their profits, this is especially important at the moment give the current state of the global economy. Materials in aerospace are also select for their ability to be able to absorb tremendous amounts of energy from unlikely event of an engine failure or an uncontrolled explosion of some sort. Aerospace engine manufacture such as Rolls Royce and General Electric also take the extra step of detonating a fan blade to see whether the engines fan case absorb and contain the impact and to stop parts of the engine escaping and causing further impact to the aircraft. Manufacturers often spend as much as $30 million on this test, at there on expense to prove to potential passengers and airline customers that the engine is truly safe and air worthy.

Asthma Essay -- Science Scientific Research Essays

Asthma Breathing is a vital process for every human. Normal breathing is practically effortless for most people, but those with asthma face a great challenge. During an asthma attack, breathing is hampered, making it difficult or even impossible for air to flow through the lungs. Asthma is an increasingly common problem, and has become the most common chronic childhood disease. At least 17 million Americans suffer from it(1), and although it can be fatal, it is usually not that severe(4). There is no cure for asthma, but with proper care, it can usually be controlled. As someone with Exercise Induced Asthma, I have personal experience with the topic. I have experienced most of the symptoms described in my research, tried many of the medicines, and have my asthma under control. This essay will first discuss the normal function of the lungs, and then proceed to explain how this is effected by asthma. The causes of the disease and the ways of controlling it will follow. Normal breathing is controlled by the lungs and the chest cavity. Airways are tubes with muscle that contracts and relaxes wrapped around them, and this accounts for the motion of the chest that is associated with breathing. The diaphragm, which is located underneath the rib cage, along with the intercostal muscles, or those in between the ribs, control the movement of the chest cavity(6). When these muscles contract, the chest expands, which lowers the pressure inside the lungs. Since air moves naturally from high to low pressure, the lungs are automatically inflated. In order to exhale, the diaphragm and the intercostal muscles relax, causing the chest cavity to become smaller. The decrease in volume causes the pressure in the lungs to go... ...pl/display.cfm?id=2⊂=32#1 4)Allergy, Asthma, and Immunology Online,Taking Control http://allergy.mcg.edu/patients/control.htm 5)Children's Medical Center of UVA, How Attacks Happen http://www.healthsystem.virginia.edu/internet/pediatrics/patients/tutorials/asthma/whydoes.htm 6)Marshall Brain's How Stuff Works Site, Lungs http://www.howstuffworks.com/lung1.htm 7) Marshall Brain's How Stuff Works Site , Lungs Continued http://www.howstuffworks.com/lung2.htm 8)American Lung Association, Five Asthma Medication Groups http://www.lungusa.org/site/pp.asp?c=dvLUK9O0E&b=22542 9)National Jewish Medical and Research Center , Exercise Induced Asthma http://www.nationaljewish.org/error.aspx?type=404 10) Children’s Medical Center of UVA , Treating Asthma http://www.healthsystem.virginia.edu/internet/pediatrics/patients/tutorials/asthma/treat.htm

Labor Relations,Employee Relations and Global HR

1. Define Job Stress, Burnout and Depression. Job stress is a type of stress that is work-related.   The pressure at work, the challenges and the obstacles that are facing employees each day can result to negative physical and physiological responses. Burnout is a term used to describe the onset of exhaustion after experiencing long-term stress.   This results from being constantly exposed to stressors at work without getting the system a chance to fully recover from adrenaline surges. Depression is characterized by low mood, lack of interest in usual things that excites the person, and lesser capacity to experience pleasure.   This condition is not alarming when it's not pervasive, otherwise, it becomes a psychiatric problem that needs professional attention. Depression can have serious effects on a person's personal life and work. 2. Explain how you would reduce stress at work. Stress impacts our thoughts, emotions, and behavior in a number of ways.   In the workplace, stress makes a person less productive and difficult to deal with. In order to reduce stress at work, a person has to recognize when he or she is experiencing it.   Some of the symptoms and signs of stress are lack of focus, moodiness, depression, and muscle tension, among others. Once a person accepts that he is experiencing stress, the next step is for him to identify what are stressing him at work.   By knowing the stressors, it will be easier for the person to deal with them.   For instance, if an employee doesn't like his job anymore, he can began scouting for other job opportunities in other companies. In most cases, however, a person does not really know what's stressing him at work.   With all the things he needs to face in the office, it would be confusing for him to exactly point out what are causing him stress.   If this were the case, the first thing that the worker needs to do is to take a break and stop working for a few days.   Distancing himself from the entire organization will give him a breathing space and a chance to slow down.   Vacationing to a warm place where there is sand and sea often does wonder to a tired mind and body. 3. Why you believe this approach would be successful. I believe that taking a long vacation would be successful because many people I have talked to have done this.   They always make it a point to go away for a few days every year in order to de-stress and slow down.   After the vacation, the employee is normally back to his old self, ready to face the daily grind at work. If a person who is constantly stressed at work does not give himself the chance to recover, the most likely thing that will happen to him is to feel burnout in the long run.   Rest and relaxation ensures that a person's mind and body will experience rejuvenation before joining the rat race once more. On another note, when stressors are identified and dealt with, the employee's worries and concerns would probably be over.   Say for example that an employee's co-worker is harassing him.   This attitude is causing the person stress.   So long as he doesn't do anything about it, he would continue to feel violated by the harassment he is receiving.  Ã‚   If he brings it out in the open and talks to the right persons, then the harassment would stop and the harassed person will be able to work more comfortably. References Depression.com Home Page.   Retrieved April 15, 2008, from http://www.depression.com/ â€Å"Preventing Burnout: Signs, Symptoms, and Strategies to Avoid It.† Helpguide.org Home Page. Retrieved April 15, 2008, from http://www.helpguide.org/mental/burnout_signs_symptoms.htm â€Å"Understanding Stress: Signs, Symptoms, Causes, and Effects.†Ã‚   Helpguide.org Home Page. Retrieved April 15, 2008, from http://www.helpguide.org/mental/stress_signs.htm      

Playboy of the Western World

The Playboy of the Western World gains its title from the scene in which Christy can't be beaten in play at any of the village sports, hence he becomes the â€Å"playboy. † The phrase â€Å"of the Western World† leads the way into Synge's theme of Irish mythmaking, then still especially noticeable in unsophisticated peasant groups. With the inclusion of this phrase, the myth of the playboy encompasses the whole world. Mythmaking deviates from reality, as is made clear by the stretch of the title: Irish village game championship can't possibly trump an entire world of athletes. Synge isn't discussing a universal theme but rather exposing a particularly Irish theme, that of mythmaking. The play opened in January of 1907 at Yeats's Irish Literary Theatre to outraged indignation and riots but over the course of the twentieth century has gained ever greater currency among critics. Had Yeats not held a public debate on the concept of artistic freedom, The Playboy may have died an ignoble death. As it happens, though, the play has by later critics been called â€Å"the most rich and copious store of character since Shakespeare’’ (P. P. Howe) and a play â€Å"riotous with the quick rush of life, a tempest of the passions† (Charles A. Bennett). These seem to be the reasons that The Playboy of the Western World has current appeal. Whereas original audiences cared about morality and decorous representations of peoples and countries, the increasing and ever increasing reach for realism, ethnic diversity and authentic representations has brought The Playboy into vogue because it was the avant garde and the precursor of what is presently valued and sought after: unveiled realism. Incidentally, one might argue that this unveiled realism, which is the idol of the present milieu, has been carried so far that â€Å"realism† is now a fancy in that it is a reality beyond reality and that it carries such clout that it is creating new reality (of questionable benefit) in its wake, which is a divergent reality from the realism that Synge depicted after living with, studying and capturing in three acts the cultural and psychological realities on the Aran Islands, from which he derived The Playboy of the Western World.