Cllinical Skils in haematology and bone marrow transplantion Nursing Essay

Cllinical Skils in haematology and bone marrow transplantion Nursing Module - Essay Example Although blood transfusion is an apparently acceptable treatment, this is not the final therapy for many types of anaemias, and they would need definitive therapies for those clinical indications. As a nurse, engaged in the care of such patients, work in this area needs considerable specialized clinical skills which are based on specific knowledge in this area. In this work, I will discuss the care of a patient with aplastic anaemia and explore the requisite clinical skills for such a patient on the basis of existing and current knowledge and also seek to examine the rationale of investigations, management, and nursing plans of such a patient from those perspectives and to investigate the alternative treatments in a patient with aplastic anaemia that I was assigned care of (Young, NS., 2002). Normal Erythropoiesis: Hematopoiesis is the process by which the formed elements of the blood or the cells in the blood are produced. The process is regulated through a series of steps beginning with the pluripotent hematopoietic stem cell. Stem cells are capable of producing red cells, all classes of granulocytes, monocytes, platelets, and the cells of the immune system. Commitment of the stem cell to the specific cell lineages appears not to be regulated by known exogenous growth factors or cytokines (Choi, JW., 2006). Rather, stem cells develop into differentiated cell types through incompletely defined molecular events that are intrinsic to the stem cell itself. Following differentiation, hematopoietic progenitor and precursor cells come increasingly under the regulatory influence of growth factors and hormones. For red cell production, erythropoietin (EPO) is the regulatory hormone. EPO is required for the maintenance of committed erythroid progenitor cells that, in the absence of the hormone, undergo programmed cell death. The regulated process of red cell production is

How Is Power Generated With Hydroelectricity?

How Is Power Generated With Hydroelectricity? Hydroelectric power energy from falling water. Hydro electric power means getting energy from flowing water. This method of energy generation is viewed as very environmentally friendly by many people, since no waste happens during energy generation. However, hydroelectric power can have a deep impact on the surrounding environment, leading some people to question the help of hydroelectric power as a method of clean energy generation. Hydroelectric power is used to run water as an energy source and mostly in grind corn. Hydroelectricity produced enough power light for two paper mills and a house. Nearly ally of the hydroelectric power stations, provide around 20% of the worlds electricity. The Origin of Hydro Power was first used in Ancient Egypt. They used flowing water to make a machine work and grind their crops. The Size of the Hydro power plants today range in size from some hundred kilowatts to several hundred megawatts. Some of the larger plants have capacities up to 10,000 megawatts and supply electricity to millions of people. Over 80 percent of all electricity produced by renewable sources is produced by large hydroelectric dams. With low carbon dioxide emissions and working costs, hydropower is an important part of a climate friendly energy mix. More sustainable sources, such as wave and tidal power, could save the standing of water based energy production. Hydropower accounts for around 20% of the worlds electricity generation, and a little over 2 percent of the worlds total energy supply. Although dams often have big environmental and social impacts, the World Wide Fund for Nature estimates that another 370 Giga watts of large, medium, or small hydroelectric capacity could be developed without unacceptable impacts by 2050. The energy output Because most dams use gravity, a hydroelectric dams energy output depends largely on the height difference between the tank water source and the outflow. Water flow along the rivers is another important factor, as is the age and efficiency of a dam. Many of the worlds older dams will need to be upgraded or repowered in the coming decades to improve efficiency, which will be expensive but could eventually add another 30 GW to the global energy mix. Environmental impact Large hydroelectric dams have a number of negative impacts on the local environment and human society. Dams disrupt river ecosystems and passages, killing aquatic life that gets caught in turbine blades. Dams also create artificial reservoirs, which floods farmland and forests, and displaces wildlife and people. Hydroelectric projects are also susceptible to fluctuations in river flows and rainfall. Which depends on energy from the Volta River Dam, has suffered severe energy shortages in recent years because of lack of rainfall. The key environmental problem with hydroelectric power is that blocking changes the natural environment. The flow of a river is basically changed when a dam is installed, posing problems for fish and aquatic plants on both sides of the dam. However, there are some arguments in support of hydroelectric power. Once installed, a hydroelectric power plant does not generate any emissions or waste, making it very much preferable to something like a coal fired power plant. The technology of hydroelectric power is also always being improved, and sometimes simple measures like fish ladders can moderate the impact of a dam. How it worksà ¢Ã¢â€š ¬Ã‚ ¦. 1. Hydroelectric power, or hydroelectricity, is generated by the force of falling water. Its one of the cleanest sources of energy and its also the most reliable and costs the least. 2. Water is needed to run a hydroelectric power-generating unit. The water is held behind a dam, forming an artificial lake. The force of the water being released from the reservoir through the dam spins the blades of a giant turbine. The turbine is connected to the generator that makes electricity as it spins. After passing through the turbine, the water flows back into the river on the other side of the dam. Basically the exciter powers the rotator. 3. Electricity is produced by spinning electromagnets within a generators wire coil that creates a flow of electrons. To keep the electromagnets spinning, hydroelectric stations use falling water. Hydroelectric power plants convert the kinetic energy contained in falling water into electricity. The energy in flowing water is ultimately derived from the sun, and is therefore constantly being renewed. As the rotator and its magnetic field turn, an electric charge is created in the stator. 4. Energy contained in sunlight evaporates water from the oceans and deposits it on land in the form of rain. Differences in land elevation result in rainfall runoff, allowing some of the original solar energy to be captured as hydroelectric power. Most hydroelectric stations use either the natural drop of the river or build a dam across the river to raise the water level and provide the drop needed to create a driving force. Water at the higher level goes through the intake into a pipe, called a penstock, which carries it down to the turbine. A transformer increases the voltage of the current coming from the starter. The turbine is a type of water wheel that converts the waters energy into mechanical power. The turbine is connected to a generator, when the turbine is set in motion it causes the generator to rotate, producing electricity. The falling water, having served its purpose, exits the generating station through the draft tube and the tailrace where it rejoins the river. Building a dam means flooding a lot of land. The sun evaporates water from the sea to the lakes. This forms clouds and falls as rain in the mountains which then keeps the dam supplied with water. For free. Gravitational potential energy is stored in the water above the dam. Because the height of the water it will get to the turbines at a higher pressure. This means that people can extract a great deal of energy from it. The water then flows down to the river as normal. There is another way of using the hydroelectric power is to build the station next to a fast flowing river. However using this way may cause a problem which when you do the arrangement the flow of the water cannot be controlled and water cannot be stored. Advantagesà ¢Ã¢â€š ¬Ã‚ ¦ Once the dam is built, energy is almost free. No waste or pollution produced It is more reliable than wind, solar and wave power Water can be stored above the dam Hydroelectric power stations can increase to full power quickly. Electricity can be generated all the time. Disadvantagesà ¢Ã¢â€š ¬Ã‚ ¦ It is very expensive to build Building a large dam will flood a very large area upstream which can cause problems for animals Hard to find a suitable site. Water quality can be effected which have an impact on plants. Hydroelectric power is renewable. It is renewable in the sense that people cannot take away the source of the energy by using them. The sun provides water by evaporation from the sea. No fuel is needed in this generation. Also energy of the tides will not go away if the power is used. Efficiency The equation for hydro electric power is P = Q X H X 0.18 X E The p is for power in watts. The Q is the flow rate in gallons per minute The H is vertical relief measured in feet 0.18 is a unit conversion constant The E is the efficiency of the turbine The micro hydroelectric turbines are an efficiency of 50%. However for the mini hydroelectric applications the efficiency is a bit higher usually around 65%. The Cost The costs of the hydro electric power is everything concerning hydro, the costs are site specific, they will depend on the head available such as the higher the head the smaller the turbine needed to generate the same level of power. The high head machines can be also be connected directly to the generator without the need for the belts. Hydroelectric power is attractive because its cheap for the consumer average price in the PNW is around 4 cents per KWH this is 3 times less than the national average. Low costs to the consumer reflect relatively low operating costs of the Hydro Facility. Most of the cost is in building the dam Operating costs about 0.6 cents per KWH Coal Plant averages around 2.2 cents per KWH which reflects costs of mining, transport and distribution. Energy density in stored important water is high, so one liter of water per second on a turbine generates 720 watts of power. If this power can be continuously generated for 24 hours per day for one month then the total number of KWH per month is then: 720 watts x 24 hours/day x 30 days/month = 518 Kwh/month. Power generating capacity is directly relative to the height the water falls. For a fall of say only 3m, 30 times less electricity would be generated but this is just for a miniscule flow rate of 1 kg/sec. Solar Power- Energy from the Sun Solar power is energy which comes from the sun. People have used sun for drying clothes and foods for thousands of years but only now people have been able to use it for generating power. The sun is about 150 million kilometres away and very powerful. Just a tiny fraction of the suns energy that hits the earth is enough to meet all the power needs many times over. Every minute enough energy gets to the earth to meet the demands for a whole year. Solar power is energy which comes from the sun. This energy is very powerful and hits the earth regardless of whether or not we take advantage of it. Even the tiny percentage of sunlight that touches the earth is plenty to meet the energy and power needs of the entire human population more than 8,500 times over. Energy from the sun is converted into solar power using solar collectors. Solar panels consist of solar cells designed to capture energy from the sun. The solar panels used in heating air and liquid are different from those used to provide electricity. To absorb the highest possible amount of solar energy, solar panels must be pointed at the sun. Energy from the sun can be converted into solar power in two ways. The first way involves the use of solar thermal applications. Solar thermal applications use the suns energy to provide direct heat to air or liquid. Solar thermal panels can be used for both housing and larger scale applications. The second way of obtaining solar power involves the use of photoelectric applications. Photoelectric applications use photovoltaic cells in converting energy from the sun into electricity. Photovoltaic cells are considered low maintenance and well suited to remote applications. They use semiconductors like silicon to convert energy from the sun into electricity. How solar power worksà ¢Ã¢â€š ¬Ã‚ ¦ Solar cells- the Photovoltaic (Photo means light and voltaic means electricity) which convert light directly into electricity, for example in sunny weather you can get enough power to run a 100w light bulb from just one square metre of solar panel. Solar cells provide the energy to run satellites that orbit the earth. Solar water heating- this is where heat from the sun is used to heat water in glass panels. This means people do not use so much gas and electricity to heat water at home. Water is pumped through pipes in the panel, the pipes are painted black, and so they get hotter when the sun shines on them. Solar furnaces- it uses a huge collection of mirrors to concentrate the suns energy into a small space and produce very high temperatures. Solar furnaces are very huge solar cookers. A solar cooker can be used in hot countries to cook food. Solar energy isnt all about generating electricity: For example, photo luminescent products store light energy. Theyre also called self-luminous and are a useful source of emergency lighting in the event of a sudden power outage. The advantages of solar power areà ¢Ã¢â€š ¬Ã‚ ¦ Solar energy is free it needs no fuel and produces no waste or pollution. In sunny countries, solar power can be used where there is no easy way to get electricity. Handy for low-power uses such as solar powered garden lights and battery chargers, or for helping your home energy bills. The disadvantages of solar power areà ¢Ã¢â€š ¬Ã‚ ¦ Doesnt work at night. Very expensive to build solar power stations, although the cost is coming down as technology improves. Can be unreliable unless youre in a very sunny climate. Solar cells are expensive Solar power is renewable. The Sun will keep on shining anyway, so it makes sense to use it. 3 main ways to use it:- Sun heats water in panels on your roof Solar cells photovoltaic cells make electricity from sunlight Solar furnace Solar power isnt much use unless you live somewhere sunny Doesnt cause pollution, doesnt need fuel. Basics of solar power The amount of power generated by solar cells is determined by the amount of light falling on them, which is depending on the weather and time of day. Sometimes there will be too much power, other times these wont be enough. In this case the system battery can be damaged if it was overcharged or over discharged. The smallest system may have only 12 volts of light, but in bigger systems 23o or 110 volts will probably be needed. An invert is used to transform the low voltage Direct Current generated by the solar panel into mains voltage Alternate current. The costs of solar power Solar power is currently selling for between  £3 and 35 per watt of rated power output. A typical panel that you might install on your roof would be rated for between 100 and 300 watts and therefore will cost between about  £400 and around  £1500 or so. A complete solar power system also needs some other components and will have some installation costs and so the total installed cost of a solar system is usually in the range of  £8 10 per watt of rated power. Most home sized systems are rated in the 1000 to 10,000 watt range and therefore cost between about  £8000 and  £100,000 to install. Many states offer refunds and tax savings that can reduce this cost by as much as 50%.These systems will normally generate between about  £300 and  £2500 worth or electricity per year. Solar panels are expected to last between 30 and 50 years and so these systems will likely generate between  £9000 and  £120,000 worth of electricity over their life time. This will be different widely though based on local electricity costs and may well increase greatly in the future if electricity rates rise. Energy efficiency Energy efficiency saves money, where solar energy saves even more money. The efficiency rating of solar panels is fairly low for instance the amount of the suns energy converted into electricity. Depending on the situation it can range from 5% to 15%, although there have been some recent breakthroughs in technology which has increased this to 40%. However it will be some years before this technology becomes money making available in the solar panels we fit to our homes. When calculating how many solar panels you need for your home, you dont need to be too concerned about the efficiency rating of your panel because photovoltaic solar panels are specified by their energy generating capacity. For example, 100 watt panels will output 100 watts of energy under ideal conditions. So if you are looking to produce 1kw per hr of energy you will need 10 x 100 watt panels. Solar panels range in their energy output. normally they range from 30 to 205 watts. If you are DIY then pay special interest in calculating your energy requirements. If you are getting a company to draw up plans for you then they will take care of this calculation. There are three main types of solar photovoltaic cells and these are polycrystalline, mono crystalline and thin film. Each has different efficiency ratings when converting the suns energy into electricity and they all have their advantages and disadvantages. The main difference between them is size and price. The more efficient technologies like mono crystalline panels are more efficient than the other two and so the panels are smaller and take up less space when comparing like for like in energy output but they are more expensive. So before you decide which panels to go for, you need to calculate your energy requirements, establish how much you want to invest and then go and compare the different panels. There are many other aspects that can affect the efficiency of your panels. We find the following to be the most common: how often you clean them, are they infrared, how much sun do they get and how hot do they get. It is a surprise to many people that for most panels their efficiency drops when the temperature starts to go above 25 Deg Celsius. If you want a hot water heater conversion then solar thermal panels are a lot more efficient. In summary, on face value solar energy does not seem very efficient, although it is improving year on year. However, dont get too tied up about the efficiency of the panels, focus more on the output, size and level of investment. Sustainability Solar energy will burn for billions of years; it wont run out any time soon. This is sustainable because it will not reduce in the near future. They use primarily silicon, which is one of the richest materials on earth. But they can also use other things, like metals (copper, silver, gold), and some toxic chemicals (arsenic, cadmium) etc. The sustainability of these materials are recyclable, and it is thought 99% of a solar cell can be recycled. But the production of them does has some toxic site affects, which means we have to balance the clean energy production of the cells with the bad by products of their manufacturing process. Appropriate energy The biggest gains are usually found in lighting. Solar power doesnt have to be used for heating, but it would help. However, electricity is a bad way of heating things, but you can use solar power to heat water. Most houses are not designed for energy efficiency especially old houses. Normally light bulbs waste a lot of energy, thats because they work by getting hot. Its like getting a little light and a lot of heat. Always use low energy lamps. However in low voltage lamps if your solar power is small and you dont have a big inverter, then you will be better off with low voltage lamps. Tidal power Coming and going of the tides gives this form of renewable energy a different advantage over other sources that are not as predictable and reliable, such as wind or solar. The Department of Trade and Industry has stated that almost 10% of the United Kingdoms electricity needs could be met by tidal power. Tides come and go is because it is all to do with the gravitational force of the Moon and Sun, and also the rotation of the Earth. This diagram shows how the gravitational attraction of the moon and sun affect the tides on Earth. The size of this attraction depends on the mass of the object and its distance away. The moon has the greater effect on earth even with having less mass than the sun because it is so much closer. The gravitational force of the moon causes the oceans to swell along an axis pointing directly at the moon. The rotation of the earth causes the rise and fall of the tides. When the sun and moon are in line their gravitational attraction on the earth combine and cause a spring tide. When they are as positioned in the first diagram above, 90 ° from each other, their gravitational attraction each pulls water in different directions, causing a neap tide. The rotational period of the moon is around 4 weeks, while one rotation of the earth takes 24 hours; this results in a tidal cycle of around 12.5 hours. This tidal behaviour is easily predictable and this means that if harnessed, tidal energy could generate power for defined periods of time. These periods of generation could be used to offset generation from other forms such as fossil or nuclear which have environmental consequences. Although this means that supply will never match demand, offsetting harmful forms of generation is an important starting point for renewable energy. Tidal energy is a type of energy that produces electricity and other form of power through the use of water. Tidal energy is the energy that could be obtained from changing sea levels. It is a direct result of tide changing from low to high. The two basic theories on how to convert tides into power are: Is involves in converting the power of the horizontal movement of the water into electricity. Involves producing energy from the rise and drop of water levels. LIKE THIS! Most are at the concept proving stage and have links to universities such as Plymouth, Manchester and Imperial College. Technologies in development include: Use of a shore based oscillating water column, Trapping and compressing air in successive waves to build enough compression to drive a turbine Using pressure differences under wave crests to drive water flows through turbine chambers Floating buoys that use the kinetic energy of the buoys rise and fall to drive a turbine Using the motion of joints in an articulated structure to drive hydraulic rams that power motors. There are different types of turbines that are available for use in a tidal barrage. A bulb turbine is one in which water flows around the turbine. If a repair is required then the water must be stopped which causes a problem and is time consuming with possible loss of generation. When rim turbines are used, the generator is mounted at right angles to the to the turbine blades, making access easier. But this type of turbine is not suitable for pumping and it is difficult to control its performance. The blades of this turbine are connected to a long tube and are leaning at an angle so that the generator is sitting on top of the barrage. The turbines in the barrage can be used to pump extra water into the basin at periods of low demand. This usually works with cheap electricity prices, generally at night when demand is low. The company therefore buys the electricity to pump the extra water in, and then generates power at times of high demand when prices are high so as to make a profit. HOW IT WORKS Step 1: First a place must be chosen for the plant to be built Step 2: Then it must be tested to make sure the waves are big enough to produce enough electricity to make up for the price. Step 3: After this they must build the power plant Step 4: Then they have to test it to make sure it works Step 5: The tidal power plant should do the following: The waves should go into the plant. The pressure of the waves should turn the turbines making electricity. It would cost at least  £15 billion to build a tidal power. However there would be a number of benefits, including protecting a large stretch of coastline against damage from high storm tides and providing an already made road bridge. Although the drastic changes to the currents in the estuary could have a huge affects on the economic and huge number of birds that feed on the mud, so when the tides goes out the birds would have no where to feed. Efficiency of tidal power The benefit of tidal range power is its remarkable efficiency: once constructed, up to 80% of the potential energy of the water captured which can be converted to electricity with no greenhouse emissions. Tidal energy is also attractive from the point of view of energy security which makes uses of resources naturally available on and around the stores. Economics The capital required to start construction of a barrage has been the main awkward block to its deployment. It is not an attractive plan to a saver due to long payback periods. This problem could be solved by government funding or large organisations getting involved with tidal power. In terms of long term costs, once the construction of the barrage is complete, there are very small maintenance and running costs and the turbines only need replacing once around every 30 years. The life of the plant is unclear and for its entire life it will receive free fuel from the tide. The economics of a tidal barrage are very complicated. The optimum design would be the one that produced the most power but also had the smallest barrage possible. Social Impact The building of a tidal barrage can have much social cost on the surrounding area. During the building of the barrage, the amount of traffic and people in the area will increase and will last for a few years. The barrage can be used as a road or rail link, providing a time saving method of crossing the bay or estuary. There is also the possibility of include wind turbines into the barrage to generate extra power. The barrage would affect shipping would have to be made to allow ships to pass through. The biggest disadvantages of tidal barrages are the environmental and ecological affects on the local area. This is very difficult to expect, each site is different and there are not many projects that are available for comparison. The change in water level and possible flooding would affect the plants around the coast, having an impact on the aquatic and shore ecosystems. The quality of the water in the basin or estuary would also be affected, the remains levels would change, affecting the turbidity of the water and therefore affecting the animals that live in it and depend upon it such as fish and birds. Fish would certainly be affected unless condition was made for them to pass through the barrage without being killed by turbines. All these changes would affect the types of birds that are in the area, as they will travel to other areas with more favourable conditions for them. These effects are not all bad, and may allow different species of plant and creature to grow in an area where they are not normally found. But these issues are very fine and need to be independently assessed for the area. Advantage Once tidal power is built it is free. It doesnt produced no green house gases or other waste It needs no fuel It produces electricity Its not expensive to maintain Tides are totally predictable Offshore turbines are not ruinously expensive to build and do not have large environmental impact. Unlike wind and solar power production using the tidal forces is constant and predictable. No Waste produced Sustainability of energy production. Easy and not expensive to maintenance. Has little impact on the environment. Tidal energy turbines are dropped into deep water, so they are not a danger to ships. Tidal power cannot be used up Disadvantages A barrage across an estuary is very expensive to build and effects wide areas Many birds rely on the tide uncovering the mud flat so that they can feed and Fish cant travel Only provides power for around 10 hours a day- when the tide is actually moving in and out There are few suitable sites for tidal barrage. Heavier that wind turbines More expensive than wind turbines. Usually producing power for around 10 hours each day. This is the time frame in which the tide is actually moving in or out. Tidal energy has potential to become a possible option for large scale, base load generation. Tidal Streams are the most attractive method, having reduced environmental and ecological impacts and being cheaper and quicker to be installed. Tidal barrage is where a dam or barrage is built across an estuary or bay that experiences an enough tidal range. This tidal range has to be in overload of 5 metres for the barrage to be possible. The purpose of this dam or barrage is to let water flow through it into the basin as the tide comes in. The barrage has gates in it that allow the water to pass through. The gates are closed when the tide has stopped coming in, trapping the water within the basin creating a hydrostatic head. As the tide moves away out with the barrage, gates in the barrage that contain turbines are opened, the hydrostatic head causes the water to come through these gates, driving the turbines and generating power. Power can be generated in both directions through the barrage but this can affect efficiency and the economics of the project. The structure of a barrage requires a very long national engineering project. The barrage will have environmental and ecological impacts not only during building but will change the area affected forever. Just what these impacts will be is very hard to measure as they are site specific, and each barrage is different. There are different types of turbines that are available for use in a tidal barrage. A bulb turbine is one in which water flows around the turbine. If protection is required then the water must be stopped which causes a problem and is time consuming with possible loss of generation. When rim turbines are used, the generator is mounted at right angles to the to the turbine blades, making access easier. But this type of turbine is not suitable for pumping and it is difficult to control its performance. Bulb Turbine Rim Turbine Tubular Turbine The turbines in the barrage can be used to pump extra water into the basin at stages of low order. This usually matches with cheap electricity prices, generally at night when the order is low. The company therefore buys the electricity to pump the extra water in, and then generates power at times of high claim when prices are high so as to make a profit. This has been used in Hydro Power, and in that context is known as pumped storage. The economical effects of tidal power are when they start building of a barrage has been the main uncertain block to its use. It is not an attractive to a saver due to long payback periods. This problem could be solved by government funding or large organisations getting involved with tidal power. In terms of long term costs, once the building of the barrage is complete, there are very small maintenance and running costs and the turbines only need replacing once around every 30 years. The life of the plant is unclear and for its entire life it will receive free fuel from the tide. The economics of a tidal barrage are very complicated. The best design would be the one that produced the most power but also had the smallest barrage possible. Social impact The building of a tidal barrage can have many social costs on the surrounding area. During building of the barrage, the amount of traffic and people in the area will increase a lot and will last for a number of years. The barrage can be used as a road or rail link, providing a time saving method of crossing the area. There is also the possibility of including wind turbines into the barrage to generate extra power. The barrage would affect shipping and navigation and but would have to be made to allow ships to pass through. Wind power A wind power is the conversion of wind energy into a useful form of energy. Such as people use wind turbine to make electricity, wind mills for mechanical power, wind pumps for pumping water or dra

Post-Traumatic Stress Disorder: Implications For Brain Essay -- Chemis

Post-Traumatic Stress Disorder: Implications For Brain Throughout the course of this semester we have examined numerous issues which have all had different implications for the brain = behavior argument. Some who have been skeptical of the validity of this idea have been swayed by observations that processes and behaviors they originally thought to have a cloudy neurobiological basis in fact have a sound biological and physiological underpinning. One such phenomenon which can help elucidate the ongoing brain = behavior debate is Post-Traumatic Stress disorder, or PTSD. Most people are familiar in some sense with the phenomenon of PTSD. This phenomenon has been renamed, reworked, and redefined numerous times over the past century. The approach to understanding PTSD and the more general notion of traumatic experience has been an interdisciplinary undertaking, involving the fields of medically oriented psychiatry, psychology, sociology, history, and even literature (1). The reason for this interdisciplinary approach is that the greater perception of the phenomenon is seen as having much more than a simple biological basis. It is seen as having multiple external influences. This view is a result of the often overwhelming sense that whatever biological mechanisms are present must be unintelligibly complex. However, there are certain aspects of PTSD which, upon examination, allow one an easy foray into the neurobiology of the disorder. Cathy Caruth, a leading trauma theorist, discusses the definition of PTSD: "While the precise definition of post-traumatic stress disorder is contested, most descriptions generally agree that there is a response, sometimes delayed, to an overwhelming event or events, which takes the form of rep... ... , by Cathy Caruth, a leading trauma theorist. http://serendip.brynmawr.edu/bb/neuro/neuro02/web3/ 2) Sensorimotor Psychotherapy: One Method for Processing Traumatic Memory," from Traumatology , by Pat Ogden and Kekuni Minton. http://www.fsu.edu/~trauma/v6i3/v6i3a3.html 3) Of One Blood , a novel by Pauline Hopkins. http://psychclassics.yorku.ca/Rivers/ 4)"The Repression of War Experience" , by W.H.R. Rivers. http://psychclassics.yorku.ca/Rivers/ 5) "The Neurophysiology of Dissociation and Chronic Disease," from Applied Psychophysiology and Biofeedback , by Robert C. Scaer. http://psychclassics.yorku.ca/Rivers/ 6) "Approaches to the Treatment of PTSD" , by Bessel A. van der Kolk and Onno van der Hart. http://www.trauma-pages.com/vanderk.htm 7) The Psychology of Fear and Stress , by J. Gray. http://serendip.brynmawr.edu/bb/neuro/neuro02/web3/

Carbon Emission Abatement Essay

Topic: Carbon emission abatement can be achieved by various meaner, for example, regulation (controlling the emitting of carbon on the same basis as governments control other pollutants), by subsidizing consumption of renewable technologies using wind or the sun, by subsidizing non-carbon polluting technologies and by supporting research into innovative green technologies. Another way of achieving reduction in carbon emissions is a pricing scheme such as a cap-and-trade emissions trading scheme (TEST), which could exist in Australia by 2014, and China probably by 2015. Nations have also achieved reductions through energy conservation. Discuss (1) the various options available for carbon abatement, their merits and weaknesses, and (2) the role government and business have to play if the methods are to achieve their objectives. Major Assignment Tutor: Mrs. Maintained Sings Major Assignment Global warming is a complicated issue faced by leaders of today. Warnings are becoming increasingly amplified, in the wake of a realization that a disastrous future ahead because of the perpetual accumulation anthropogenic greenhouse gases ? emanating from fossil-fuel combustion and burning forests. PM Tony Blair told BBC sews that scientific evidence of global warming was â€Å"overwhelming† and its consequences â€Å"disastrous†. Global warming is the observed increase in the average temperature (f the Earth’s atmosphere and corners in recent decades (Brakeman 2009). The Earth’s average near-surface atmospheric temperature increased by 0. 6 ? ± 0. 2 Celsius (1. 1 ? ± 0. 4 Fahrenheit) in the 20th century (The Universe-Galaxy-stars 2012). Global warming and climate change have already unleashed untold suffering to thousands of people across the face of the earth. Think of the millions of environmental refugees who have been forced to vacate the land of their forefathers cause of flooding. Thousands of children in Africa have been born into lives of poverty, disease and famine, resulting from shifting climatic conditions (Andorra 2011, quoted in Africa – Up in Smoke, 2012, 12). In Niger for example, drought and famine claimed the lives of nearly 70 people (BBC News 2012), whilst later in the year, unexpected flooding displaced 1 50000 families, stirred up a cholera outbreak and claimed more lives. In Australia and the US, wild raging fires have destroyed the habitat of thousands of species, reducing beautiful vast â€Å"carpets† of green thriving tit flora and fauna; into barren lifeless stretches of sparsely vegetated, stunted and horrid landscapes with little biodiversity. Moderate to exceptional, whilst intensified convection over the Caribbean also brought heavy rains to Colombia, where flooding displaced an estimated 1. 5 million people. Thousands of pages can be authored to document the incalculable grave impacts global warming has caused to our beloved mother earth. It is even more astonishing when you realism that all this anguish has been borne by people who are now alive today. You cannot help but wonder what it shall be like in the more distant true. A continued surge in co levels for another century will see gases reach a level unheard of since millions of years ago. The consequences are anticipated to take many centuries to be fully manifested, as the Earth transforms into a new state. In the distant future, eras with high CO are anticipated where sea levels will be even higher and temperature will soar to catastrophic levels: a planet grossly unlike the one to which the human species is adapted (Conservation Foundation 1963). By now you may be wondering â€Å", what is the link between Global Warming and Carbon Emissions? After all, the essence of this account is a mere review of the various meaner by which Carbon Emissions may be reduced. Scientific research has established a link between Global Warming and Carbon Dioxide pollution. Carbon dioxide particles are capable of retaining heat energy received from the sun (Rogers 1989). The atmosphere naturally contains optimum levels of carbon dioxide, necessary to make the earth habitable (green-house effect). Human activities such as burning of forests and fossil fuels, however, further append co levels in the atmosphere to catastrophic levels which cause global warming and climate change (Munroe 2011). The author was inclined to explain the relationship between Carbon emission and Global Warming, so as to express the weight of the Carbon Reduction issue under review. Mitigating carbon emission seeks to curb Global Warming and all its adverse impacts highlighted previously. Global warming is the â€Å"bigger picture† beyond carbon emission. Carbon reduction methods in the discussion essentially target the sectors summarized the opposite pie-chart. Government can use regulation to reduce carbon emission levels. This is essentially a â€Å"command-and-control† approach, where standard minimum requirements are established and enforced by law. Such laws may target annual level of carbon emission, mandatory adoption of given forms of clean technology and production techniques. Compliance by emitters is mandatory, the failure of which is punishable by fines, public shaming, penalties, sanctions and blacklisting. (ESSAY Emission. Trading 2010). Regulation is an effective control mechanism as it covers all aspects of the global emission by sector. Regulation almost guarantees a reduction, as companies seek to and static, that it fails to allow firms to determine a cost saving approach, based on the elimination of non-value adding costs and the most efficient course of action elevate to the industry (ESSAY Emissions trading 2010). Low volume, small industries such as dry cleaners and book printers, for example; may feel aggrieved when their carbon assessment is made on the same basis as that of mega profit making high volume industries such as oil and gas extraction or car manufacturers. The smaller industries are sure to comply with the legal requirement concerning carbon emissions in the fear of being penalized substantially. The bigger industries however, may find the penalties very negligible in comparison to the high revenues they generate. This sad tale ensures that â€Å"small companies remain small,† whilst the bigger industries continue to grow. As mentioned by Parry (2004, 35), regulation when used to dictate capital injection towards a given technology or production technique; is criticized for being efficient than substitute alternatives available. Presently, the fines for breaking the EX. carbon law is pegged at 100 euros ($130) per metric ton (1 . 1023 tons) of carbon, for airline companies and 7 euros per metric tones for general manufacturing industries (ESSAY Emissions trading 2010). As stated by Paltrier (2010, 13), laws against the carrying out of deforestation are another form of regulation that target carbon emission reduction. Deforestation is the unwarranted cutting down of trees for logging, mining, oil and gas extraction; cattle ranching or agricultural purposes. You may have wondered, if at all any linkage exists between trees and carbon. How do laws against deforestation achieve carbon reduction? You will be glad to know that trees act as a carbon sink, absorbing carbon dioxide in the atmosphere. The presence of trees creates a carbon sink which eliminates to greater extent, the excess levels of carbon. When this mechanism however is eliminated, then how will atmospheric carbon subside? The absence of trees would cause an unprecedented exponential growth in Carbon levels. However it is saddening to note that most of the damage has been done already. Did you know that between 1930 and today, Philippines has lost 90% of its rainforest’s, whilst Madagascar has lost 95% of its rainforest’s, El Salvador 70-85% of its rainforest’s due to heavy bombing during the civil war 1984-1985. Sumatra has only 15% of its rainforest’s left. It appears that substantial damage has been done already, yet still, governments cannot afford to waver in the fight to curb deforestation. It is encouraging to note that some governments have even taken a pro-active approach to not only protect their few remaining forests, but to replenish the depleted ones also. Issues of economic development hinder the effective implementation of deforestation laws. Imagine the impact of halting logging activities in Africa, which are providing employment for millions of people and â€Å"putting food on the table† in thousands of homes. What about the grave effect on their already beset economies; what would it mean for initiatives such as building schools, educating and empowering women on family planning and many other crucial issues? Resultantly, it is no surprise that only 6% of Central Africans forests are protected by law (Laurence et al 2006, 457). Service, to ensure efficiency and marginal carbon emission from the combustion of fuel. Other regulations, such as the U. S Lacey Act 1968, bar the trade of wooden products across international boundaries. The role of government is to provide adequate funding for the effective implementation of these laws and of course to enact the legislation to curb carbon emission (Greenback 2011). Another way of reducing carbon emission as stated by Festoon (10, 4) is the rewarding of development of renewable technologies using wind or the solar energy. The truth of the matter is that, it is relatively costlier in the early years to develop clean technologies. Setup costs are high and most companies are discouraged. However, rewarding the development and use of such technologies would provide incentive for companies to partake. Such reward can be in the form of government subsidy to lower acquisition costs of setup material, the provision of expert engineers to assist in the setup activity, offering loans to clean technology development projects as well as a mere sign of recognition and appreciation. The government will obviously need to cater for these requirements in its national budget. The government is also tasked with rendering support for research into innovative green technologies. The subsidy approach is highly viable as it provides incentive for businesses to develop cleaner technologies, whilst the company’s liquidity and cash flow remain relatively unaltered. This entails that companies will continue to enjoy healthy profits whilst, developing cleaner technologies concurrently, or in the case of government loans; spreading the cost of the financing activity which will be eventually offset by rower operating costs in the long run. This approach also ensures a healthy mutually beneficial relationship between the government and business. One drawback however, is that once companies attain such loans, they may not be used entirely to serve the purpose of clean technology development. In Zanzibar, for example, cases have been recorded whereby; some farmers misused loans rendered to them by the Ministry of Agriculture through Agro-Bank, for the purpose of developing wind vanes (Mutagen 2012). Furthermore, resources are not always sufficient enough to provide for this cause. Carbon emission may also be reduced through a federally-imposed carbon tax (Ovenbird 1997). The main idea is that government can use the surplus tax revenue to finance subsidies in the development of selected low-carbon technologies. The chances of any government imposing a new tax however, is somewhere between zero and nil. If carbon is taxed, this will significantly decrease annual profits, repel investors and cause economic recession. The successful imposition of carbon tax would entail that governments possess a whole new pool of subsidy revenue to distribute to industry. Will the tax revenue be used to provide subsidies for clean genealogy development? If at all subsidies are indeed issued, would you trust that they will award them to the right companies, foot the right reason? It is a really a be the most effective strategy? Naked (2003:11) revealed that in Japan, a carbon tax rate of $2. 0/mm Btu case produced an emission rate of 324 mm ETC in the year 2040, attaining a 23% reduction in the emission rate. Without carbon tax imposition however, CO emission in 2040 would be 420 mm ETC (2003) . Without tax return in this case, CO emission rises to 332 mm ETC, producing an 8 mm ETC production compared with the tax return case. Clearly carbon tax, though controversial, can bring the results. Pricing schemes such like the cap-and-trade emissions trading scheme (TEST) can reduce co (Hessian 14,349). The role of government in this case is to â€Å"set the ground rules. † Its role is restricted, and major decisions are made in the private sector. The government establishes an overall emissions cap and assigns specific emissions allocations to the different sources of CO. Industries and companies are free to decide as to what to do or how to meet their allocations. The government needs to engage experts of industry, to come up with a reasonable maximum amount f carbon emission for various respective industries. Furthermore, the government is tasked with providing an accurate and reliable meaner of carbon emission measurement. Furthermore, there is also need to engage with other relevant bodies such as the EX., AU or SEAN. In the case of the European Union member countries for example, governments ought to work together in the implementation of cap-and- trade schemes. The two vital components of cap-and-trade schemes is the cap itself, and its flexibility that allows companies to exchange emissions warrants. The cap is perimeter of carbon emissions imposed by the TEST. The cap is attained by the creation of emissions permits, supplemented by a business requirement for emitters to yield the amount of permits equivalent to their carbon emissions, traditionally on an annual basis. Under an TEST any firm emitting carbon under the permissible perimeter may retain permits equivalent to the amount of its carbon emission, whilst the excess permits may be sold. Presently, carbon permits can be traded at 7 euros a metric ton. Permit price fluctuates according to market volatility, whilst the cap (maximum permissible amount of carbon emission) is fixed. The buying and selling of carbon remits is the second vital aspect of cap-and-trade schemes. One major advantage is that companies can implement carbon abatement at a lower cost than compared to the permit price for excess emissions. This ensures that companies will purchase permits, only when the cost of reducing its emissions surpasses that the purchasing price of permits. Emissions reductions will therefore be attained at the lowest cost to the economy and society at large. Other advantages include the following; predictable annual carbon emissions which allow for economic and carbon forecasting, relatively lesser political barriers than a tax, government can generate venue which can be reinvested through rebates or utilized to provide public goods such as roads and street lighting and companies generate revenue as carbon emissions decline. Cap-and-trade successfully reduced the sulfur oxide emissions that cause acid rain, quickly and cheaply (Roberts 2012) Critics argue that, whilst total carbon emissions are capped the monetary worth thereof remains unspecified as it is determined by several market variables. This meaner that some economic conditions result in a marginal price for permits, which does not provide sufficient incentive for companies to limit their carbon emissions ND sell the excess permits. Another scenario may also occur, where, the market conditions result in a very high price which exceeds that of reducing carbon emissions. The scope and manner of price setting may also result in too many permits may be issued which gives rise to other market imperfections. Industrial nations must reduce their dependence on fossil fuels such as gasoline, oil, and coal as they produce carbon dioxide, a heat-trapping gas that causes global- warming. Industrial countries are liable for most of the worldwide carbon emissions. These countries however, are capable of switching to cutting-edge energy saving cosmologies that produce marginal carbon emissions. Clean, renewable sources, such as solar, wind, and hydro-electricity, can generate sufficient energy without increasing carbon emission (Blackmore 1998). Such technologies need to be deployed much more widely, whilst government policies must encourage their use. Investment should also be directed towards developing and commercialism’s clean technologies. The Australian Government for example, invested more than $5 billion in clean energy technologies development since 2000. Such technologies are vital efforts to reduce carbon emissions. (Department of Climate Change and Energy Efficiency) As stated by Dawson (1987,16), transferring Clean Technology to Developing Countries is also necessary for carbon reduction. Leading businesses, international organizations, and the Medic’s ought to devise a meaner to transfer energy saving technologies to Lead’s. This enables Lead’s to develop their economies without using environmentally unfriendly fossil fuel technologies which the Medic’s are now striving to phase out. As pollution knows no boundaries, it is vital for all world governments to reduce carbon emission. However, this creates a dependency syndrome, where poor countries over-rely on richer countries. African leaders for example, have been criticized for living lavishly, yet failing to bring about economic growth in their countries, which leaves their citizens to survive on donations from Medic’s and No’s. The government must also initiate behavior change. This can be done through awareness campaigns, media advertising as well as communicated in schools and work places. Did you know that cars, trucks, and buses consume over half of the oil consumed in the United States (Wellhead 2010)? Imagine the impact of substituting traditional vehicles with energy efficient gasoline-powered cars, electric and fuel-cell ears and buses. These measures will lessen CO emissions by using less gasoline. In addition, campaigns may also encourage consumers to make less trips (encourage walking for small errands), use of public transportation, bicycles, and carpools. If we use less energy, less carbon dioxide is produced. Over the past two decades, American industry and consumers started using more-efficient motors, vehicles, appliances, windows, and manufacturing processes. Vast amounts energy and money promote energy efficient products. (Graph showing natural gas reduction of oil reliance- Centre for American Progress 2012) Governments must also slow down population growth, through awareness, family planning, women emancipation and free distribution of contraceptives. Whilst all the aforementioned technological and economic changes can reduce per capita carbon emissions, persistent large population increases will retard emission reduction efforts. The more people there are, the more energy is required. Reducing population growth rate will alleviate carbon reduction efforts. Reducing carbon emission is not an event that can be completed over night; but a process which needs several years to bring fourth results.

Ehe characteristics of a person Essay

It is true that the characteristics of a person may determine his or her success in corporate America. But the corporate world operates through the principles of economics: supply, demand and competition. This summarizes how a person’s success in the corporate world as determined by his or her characteristics is also determined by the principles of economics. There is no doubt that corporations exist to do service to others, but most of the time, if not all the time, this is only a secondary aim. Corporations admit it or not, are of course created to bring profit for their owner/s. The purpose of capital is to produce more capital. Corporations are put up to grow an economy. Owners of corporations put up their enterprise with capital gains in mind. While being motivated by sheer altruism is well and good, this may prove to be dangerous for any business and in the long-run to the consumers themselves, without the support of third-parties. Simple economic theories support that businesses, if not motivated by any economic incentives would be ruinous to itself (because it won’t be able to support itself) and to others (because the business wouldn’t be able to provide quality service). Thus, it is only expected that owners of corporations are characterized as being driven, and motivated by self-interest (corporate interest) more than being motivated by service to others. Corporations are viewed in light of an atmosphere of competition. That a company provides quality service is only secondary, done only as a means to further business interests. After all, the corporation is not expected to succeed if it continues to offer poor quality products or services; Demand decreases as consumers flock to rival firms, and they are expected to reduce their prices, therefore reducing their profits. This is the corporate world—full of self-driven individuals, aware of the principle of survival and motivated by economic incentives. Whether one likes it or not, the natural tendency of people to become entangled in the principles of economics propagates a dog-eat-dog world wherein the meek struggles and the ruthless survives. When everyone is expected to be ruthless in the corporate America, how is it possible for someone to succeed if such person himself is not as ruthless or better yet, more ruthless? Such person will be easily crushed. How is someone to succeed if such person is so limited by his averseness to risks? Opportunities and growth unfortunately, do not come without risks. Therefore, a person who is incapable of taking risks and cannot be ruthless when situations call for it cannot be expected to succeed in the business world that apparently requires such characteristics in order to just survive. However, ruthlessness, tough-mindedness and the ability to take risks do not equate to dishonesty, lack of ethics, and unscrupulousness—characteristics of a businessman as portrayed by media. The latter characteristics are not requisites of survival. A person may be both ruthless and tough-minded while still remaining virtuous. In other words, success may come even without being dishonest, unethical or unscrupulous. In fact, the latter characteristics may even lead to the demise of a corporation. People, after all, should not be expected to be incapable of seeing behind any act of unscrupulousness. Once detected, the fall of the business is likely to follow as the law of demand and supply again, takes over.