The No Load Circuit And Short Circuit Characteristics Biology Essay

The No Load Circuit And Short Circuit Characteristics Biology Essay The Ward-Leonard system is a conventional speed control method. It consists of a 3 phase induction machine controlling a separately excited DC generator. The DC generator in turn supplies a variable DC voltage to a DC motor. It is basically a DC variable speed drive [2]. The Ward-Leonard system is shown below in Figure 1. Figure : Ward-Leonard system setup The principle behind the Ward-Leonard system is that the DC generator can actually influence the motor to develop a torque and speed required by the load [3]. Thus the speed of the generator is directly proportional to the armature voltage applied to the DC motor [2]. The output voltage of the DC generator is controlled by adjusting the exciting voltage (field voltage), this then controls the speed of the DC motor [2]. Applications Travelling cranes Lifts Mine hoists Boring machines Table : Ward-Leonard system advantages and disadvantages Advantages Disadvantages Very wide range of speeds High cost Provides step less speed control Low over-all efficiency Experiment Apparatus 2- coupled induction machine and dc motor (as shown below in Figure 2) 4- digital multimeters (DMM) 2- Variac (Excitation field) Tachometer Figure : Coupled induction machine and dc machine Objectives of the experiment Characterise the DC machines and determine the equivalent circuits. Derive the power flow equations between the DC machines in terms of the equivalent circuits. Control the power flow between the DC machines by adjusting the field currents. Then compare the measured results with the expected theoretical power flow. Experiment procedure and setup No-load Test This test was used to determine the armature voltage. Before the experiment began the armature and field resistance were both measured. The Variac (exciter) was then connected to the field port on the DC machine. The Digital multimeter was connected to the armature port on the DC machine in order to measure the armature voltage. The DC machine was coupled to a three phase induction machine which was first turned on to run the DC machine. The setup is shown below in Figure 3. Using the knob on the Variac, increase the field voltage with an increment of 10V ( also increases) and for each case determine the armature voltage. This was done from 0V to the rated field voltage 110V. Now decrease the field voltage to demagnetise the DC machine from 110V to 0V also with an increment of 10V. Note the residual magnetism. Figure : No-Load test setup Short-Circuit Test This test was used to determine the armature current. The same procedure for the No-Load test was followed but in this case the digital multimeter was connected in series in the armature port in order to measure the current. Using the knob on the Variac, increase the field voltage with an increment of 10V and for each case determine the armature current. This was done from 0V to the rated field voltage 110V. The DC machine was demagnetised from 110V to 0V also with an increment of 10V recording the armature current. Ward Leonard experiment This setup was used to determine the power flow between the machines. The two coupled machines were connected together as shown below in Figure 4. A coupled machine is shown in Figure 1. The coupled machines were connected together through the armature. The positive terminals of the armature were connected together and the negative terminals were connected together. A digital multimeter was connected in between the positive terminals of the armature in order to measure the current. Each DC machine was connected to Variac through the field port. Both the Variac machines were turned down to 0V. The two induction machines were switched on both at the same time from the 3 power supply. The Variac knobs were both turned at the same time with an increment of 10V from 0V. This is done up until the multimeter reads 0A. The 0A was obtained at a field voltage of 110V. At this stage the second machine was left constant and the field voltage of the first machine was turned down at an increment of 10V, whilst recording the current and the speed of the machine without exceed the speed of 1502 rpm. A tachometer was used to measure the speed. After that the first machine was calibrated back to 110V, were the multimeter reads 0A. Now the first machine was left constant and the field voltage of the second machine was turned down at an increment of 10V, whilst recording the current and the speed of the machine without exceed the speed of 1502 rpm. A tachometer was used to measure the speed. After this then the practical is complete, the next step is to deduce an equation for the power as a function of excitation (field current) based on the machine characteristics. Then plot the graphs. Figure : Power flow setupC:UsersMashDesktopf.bmp Safety Do not exceed the ratings of the machines and all the other equipment. Switch off the equipment after completing the practical. Results Characterisation of DC machine Table : Armature and field resistance Resistance Before After 7.3 à ¢Ã¢â‚¬Å¾Ã‚ ¦ 9.8 à ¢Ã¢â‚¬Å¾Ã‚ ¦ 573 à ¢Ã¢â‚¬Å¾Ã‚ ¦ 542 à ¢Ã¢â‚¬Å¾Ã‚ ¦ No-load characteristics G:Machine Pracopennn.bmp Figure : No-load circuit Table : No-load test results Magnetizing Demagnetizing Field volts (V) Armature volts (V) Field volts (V) Armature volts (V) 0 0 1.6 9 10 27.8 10 35 20.8 61.1 20.5 68 30 88.9 30.1 97 40 116.8 38.2 119 50.1 141.1 50.1 148 60.6 165.1 60.1 170 70 181.9 69.5 185 80 196.2 80.4 200 90 209 90.5 211 100.2 218 100.9 220 110.3 227 110.3 227 Figure : No load test results plot The following table shows the calculated field current using the measured field resistance of 573 à ¢Ã¢â‚¬Å¾Ã‚ ¦. Table : Amperes in the field coils Magnetizing Demagnetizing Field volts (V) Field Amperes (A) Field volts (V) Field Amperes (A) 0 0.0000 1.6 0.0028 10 0.0175 10 0.0175 20.8 0.0363 20.5 0.0358 30 0.0524 30.1 0.0525 40 0.0698 38.2 0.0667 50.1 0.0874 50.1 0.0874 60.6 0.1058 60.1 0.1049 70 0.1222 69.5 0.1213 80 0.1396 80.4 0.1403 90 0.1571 90.5 0.1579 100.2 0.1749 100.9 0.1761 110.3 0.1925 110.3 0.1925 Figure : DC generator no-load characteristics Comments The graph shows the relationship between the no-load armature voltage and the field current at a constant speed of 1496 rpm. The magnetization curve is a straight line up to a field current of 0.1A, after this point the graph approaches a condition known as saturation, thus any increase in the field current does not result in an increase in the armature voltage. Consequently the demagnetizing plot is above the magnetizing plot, this is due to the residual magnetism and hence the curve begins just above the 0 mark (a little way up). Closed circuit test G:Machine Pracshortt.bmp Figure : Closed circuit diagram Table : Closed circuit results Magnetizing Demagnetizing Field volts (V) Armature current (A) Field volts (V) Armature current (A) 1.7 2.54 1.6 0.21 10.8 3.63 10.7 1.1 20.5 4.52 18.8 1.81 30.8 4.72 29.5 2.64 40 5.54 39.9 3.37 50.9 6.4 50.2 3.93 60.7 5.59 60.8 4.44 70 6.01 70.7 5.05 80 6.1 80.8 5.5 90 6.52 90 5.9 100 6.92 100 6.54 111 7.4 111 7.4 Figure : Short-circuit characteristics Nameplate Information No-load circuit calculations Figure : No-load Fitted-curve This can be written as Using Figure 10 we can use the fitted plot of the no-load saturation curve above to determine the constant. The measured speed is used. From Thus we can calculate: But in practice we can approximate the value of the torque constant Short-circuit calculations Figure : Short circuit fitted plot This can be written as As calculated above Thus by substitution Thus now we can determine the armature resistance Coupled machines (Ward-Leonard system) ) 110.1 110 0.1 1492 1491 0.205224 0.15597 110.1 100 0.15 1492 1492 0.186567 0.212687 110.1 90 0.49 1490 1494 0.16791 0.625299 110 79.9 0.86 1486 1499 0.149067 0.974303 110.1 70 1.22 1490 1498 0.130597 1.210896 110 60 1.59 1480 1499 0.11194 1.352687 110.1 50 2.03 1484 1501 0.093284 1.439179 110.1 40.3 2.45 1484 1503 0.075187 1.399974 Power flow ) 110 110 0.1 1492 1492 0.205224 0.15597 100 110 -0.83 1492 1496 0.186567 -1.17687 90 110 -1.17 1480 1500 0.16791 -1.49306 80 110 -1.56 1470 1500 0.149254 -1.76955 70 110 -2.05 1474 1500 0.130597 -2.0347 60.1 110 -2.25 1483 1502 0.112127 -1.91737 Derivation of power equation Figure : Ward-Leonard system setup Figure : Ward-Leonard system equivalent circuit Now from Figure above we expect that Where (For the generator) (For the motor) (For the generator) (For the motor) Equate equation (1) and (2) Rewrite the equation Now we observe that Let This equation remains the same, it just depends which machine is a generator and which machine is a motor. As mentioned above to determine which machine acts as a generator or motor, we look at the following sign conversion. Conclusion DC machine Characterisation The DC machine characterisation of the generator was successfully done, both the no-load test and the short circuit test were done and all the parameters were calculated. The parameter calculated include the armature resistance which was found to be 6.25 à ¢Ã¢â‚¬Å¾Ã‚ ¦ as compared to the measured and the rated armature resistance it is within range ( difference). The characterisation also helps us understand how the dc works; by using the saturation curves we can determine the point where the machine starts saturation and determine the critical resistance. We can also determine information about the machine which would normally be given in the nameplate. Ward-Leonard system and the power flow The power flow equation was successfully derived and found as the equation below The equation was derived from the Ward-Leonard system that was setup in the practical. The practical showed that the power can be controlled between two DC machines using this setup. In the practical the power flowed from the generator to the motor, this was seen through the current having a negative current flowing in one direction and a positive current flowing to the other direction. The practical was successful and it clearly corresponds to the theory. What I leaned The practical was useful in terms of helping us understand the concept of residual magnetism which is the same as in the theory. The practical was also a good representation in terms of how an elevator/lift works.

Critical Reflection On Corporate Social Responsibility Projects Accounting Essay

Critical Reflection On Corporate Social Responsibility Projects Accounting Essay The aim of this paper is to provide a critical reflection considering the ethical point of view of the CSR projects which companies are increasingly launching with the global emerging trend of corporate social responsibility in the business world today. The purpose is to evaluate the objectives of these campaigns, comparing if they are rather actions targeting profits or/and better corporate image or if they are truly altruistic actions driven by the increase of the concern involving the global issues nowadays. WHAT IS THE PURPOSE OF A CORPORATION? Indubitably, this question has been widely discussed for many years, as great theorists show different point of views, arguing that either the primary objective of an organization is to maximize value or to be devoted to its mission and essentially satisfy the stakeholders needs. Basically there are two main theories: shareholder value theory and stakeholder theory. The first one argues that the only objective of a company is to maximize profit and generate value to its shareholders. At the other extreme is the stakeholder theory, which suggests that the organization not only should make profits and create value to the shareholders but also please their stakeholders, such as customers, employees, suppliers, local communities, and society at large. (Morgan Stanley, 2008) One of the earliest precursors of the shareholder value theory is Milton Friedman that emphasized once: So the question is, do corporate executives, provided they stay within the law, have responsibilities in their business activities other than to make as much money for their stockholders as possible? And my answer to that is, no they do not. (Friedman, 1974) On the other hand, Dave Packard the co-founder of the Hewlett Packard proposed a distinctive cause for company existence: I think many people assume, wrongly, that a company exists simply to make money. While this is an important result of a companys existence, we have to go deeper and find the real reason for our being. As we investigate this, we inevitably come to the conclusion that a group of people get together and exist as an institution that we call a company so that they are able to accomplish something collectively that they could not accomplish separatelythey make a contribution to society, a phrase which sounds trite but is fundamental. (Packard, 2002) The ground of the stakeholder theory is not far from the corporate responsibility concept or trend, which undeniably attract much attention in the last years. As the theory, CSR objective is to determine all the stakeholders and pursue a balance between the main concerns and goals of each one of those (Morgan Stanley, 2008). While Friedmans and Packards points of views represent extremes opinions, others have promoted a mid-term approach. Peter Drucker, for example argued that a middle ground is essential for one business to be considered successful as illustrated on the statement bellow: A business that does not show a profit at least equal to its cost of capital is socially irresponsible; it wastes societys resources. Economic profit performance is the base without which business cannot discharge any other responsibilities, cannot be a good employer, a good citizen, a good neighbor. But economic performance is not the only responsibility of a business Every organization must assume responsibility for its impact on employees, the environment, customers, and whomever and whatever it touches. That is social responsibility. (Drucker, 1954) All in all, the fact is that there are many diverse opinions among specialists and executives. Therefore, in my opinion the CSR of one company is influenced mainly according to the beliefs and values of its leaders, especially the CEO, rather than the mission statements of the organization. CORPORATE SOCIAL RESPONSIBILITY IS INCREASING AS A TREND BUT DECREASING WITHIN COMPANIES Before analyzing more extensively the corporate social responsibility as a trend within the companies, I truly believed that the CSR practices were substantially increasing. However after reading the 2008 Morgan Stanley publication about the topic, I was surprised with the results. Considering the methodology utilized by Morgan Stanley, It seems that the overall real concern of CSR is decreasing over the last 15 years. Although the organizations might be investing more in CSR projects, the damage/harmfulness caused by the companies is increasing on larger scale. So, this means that the negative actions are not being covered by CSR practices. Instead, the careless with CSR is increasing much more than the projects as could be analyzed in the table below. KLD defines a set of potential strengths (for example, charitable giving) and a set of potential concerns (e.g., hazardous waste). For each company, KLD assigns a value of 1 if the strength or concern exists and a 0 otherwise. (Morgan Stanley, 2008) In conclusion, besides the strengths are increasing, the concerns are rising more rapidly and the net value of the strengths minus concerns is decreasing each year. Evidently, that the result presented could be argued and probably other studies with different methodologies could show diverse outcomes. However, I personally like the methodology because not only shows what companies are doing well but also consider what they are doing wrong. Nevertheless, in my opinion does not matter if they are investing more if they are depreciating even more. Even though, companies are not emphasizing CSR as I would expected so, unquestionably the trend is increasing within the society, followed by the pressure for new management practices and concerns with the environment. A good evidence to illustrate that hypothesis is the rise of the relevance and coverage of this topic at the universities. One study conducted by Lisa Jones Christensen in 2007, aimed to further investigate the importance of CSR, Ethics and Sustainability at the top 50 global MBA programs. The results showed that 84% of the schools that responded oblige students to take courses of one or all of these subjects. Even more 25% represented a stand-alone course. Comparing with The Ethics Resource Center study conducted in 1988, when 75% of Ethics, CSR, and Sustainability Education were a required part of the program and only 5% of the MBA programs required a separate course on ethics. (Christensen, Peirce, Hartman, Hoffman, Carrier, 2007) Summarizing, in my point of view CSR is a relevant subject and it is an increasing trend among the society, however companies are not giving the importance they should to these practices. Moreover, as will be presented on the next section, companies could gain more profits with a different approach of CSR. COMPANIES INVEST IN CSR AS MEANS TO MAXIMIZING VALUE OR TO DO THE RIGHT THING AS AN END ITSELF? As Michael Jensen discuss in the article Value Maximization, Stakeholder Theory, and the Corporate Objective Function, published by the Journal of Applied Corporate Finance in 2001, there are two alternative reasons for organizations to finance CSR initiatives. The first one is known as the moral theory, which CSR considers organizations as good corporate citizens by losing profits when necessary to serve other stakeholders, including society at large (Jensen, 2001). Above all, corporations have responsibilities to their customers, employees, and communities that should be given at least equal priority with their economic goals for their shareholders. On the other hand, the economic theory for CSR suggests it as a positive-NPV investment. More simply, presume CSR as the same as any business investment decision: Invest in all essential stakeholders if there are expected returns, at least equivalent to the cost of capital. (Morgan Stanley, 2008) Nevertheless, the main question to address is why companies are investing in CSR? For economic reasons, expecting returns, or they are really concerned and are investing with moral arguments? To answer that question, once again I will reference the Morgan Stanley study. The article states the premise that corporations that are more disposed to reduce shareholder returns for stakeholders would probably invest not only to increase their CSR strengths but also to decrease their CSR concerns. In other words, those organizations would adopt the idea of First, do not harm. Therefore, such companies would make efforts both to increase their CSR strengths and reduce their CSR concerns. In contrast, companies concerned with the returns of the investment in CSR would give priority on building their strengths, as many of them do it to make a public demonstration of ones progress, instead of focusing their efforts to address the weaknesses. Especially because usually is very costly to eliminate many CSR concerns. As I predicted, the results shows that companies invest on CSR projects primarily to maximize value rather than endorse stakeholder commitments as an end in itself. This means that businesses are financing CSR to strengthen their attributes instead of eliminating the CSR concerns. However, the most interesting factor is that the same research found that companies with more CSR strengths or fewer CSR weaknesses presented higher returns. This suggests that financing CSR initiatives generates profit and long-term value maximization, as could be observed in the graph below. Even more, companies which focus on reducing the concerns and thinks primarily on the stakeholders rather than profits, in a long run makes better results that corporations which allocate resources on strengthen their CSR attributes and have the economic approach. In other words, being ethic and altruistic considering the investments is more profitable! (Morgan Stanley, 2008) (Morgan Stanley, 2008)

Kashmir Issue: Confrontations between India and Pakistani since Partiti

In the late 1940s, when the two competing nationalist for India and Pakistani failed to reach accommodation, Britain decided to partition its Indian empire (Wirsing 22). The role of dividing the empire was on the hands of a British representative (Viceroy Lord Mountbatten). He facilitated creation of a Muslim subcontinent, Pakistani. The state of Pakistani was formed with two flanks (eastern and western) separated by 1500 miles of the new states of India (Wirsing 22). The main aim was to establish a region to be occupied by Muslims in the British India. The origins of Indo-Pakistani conflict over the disputed territory of Jammu and Kashmir are complex, rooted in the process of British colonial withdrawal from the sub-continent (Wirsing 22). Kashmir posed a distinct problem (Wirsing 22), and from the time it was established there have been serial conflicts. Indo-Pakistan war of 1947; this war took place with a formal declaration neither made by Pakistani nor India. The Indian army and rebels, supported by elements of the Pakistani army, fought a series of pitched battles with each side incurring sufficient losses (Ganguly and Devin 163). Indian army succeeded in acquiring some parts of Kashmir during the first days of the war, but this was soon shut down by insufficient equipment supplies and of army training. As soon as the rebels identified Indian army's weakness, they took advantage of the situation. This forced the Indian army into a tactical retreat, but this did not last long before the Indians launched a counter-offensive (Ganguly and Devin 163). To react to this, Pakistan army became directly involved in the war. Kashmir situation was more complex because it had a Muslim majority (about 80 percent), a border w... ...pments in the Indian politics depict an intense hatred between the Muslims and Hindus. Policy makers in both countries need to come up with long-term solutions to prevent further losses of lives. Policies which bridge the gap between differences in political, social and religious beliefs need to be implemented. Works Cited Fernandes, Clinton. Hot Spot: Asia and Oceania. Westport, Conn.: Greenwood Press, 2008. Print. Ganguly, Sumit, and Devin T. Hagerty. Fearful Symmetry: India-Pakistan Crises in the Shadow of Nuclear Weapons. Seattle, Wash.: University of Washington Press, 2006. Print. Lyon, Peter. Conflict between India and Pakistan: an Encyclopedia. Santa Barbara, Calif.: ABC-CLIO, 2008. Print. Wirsing, Robert. India, Pakistan, and the Kashmir Dispute: on Regional Conflict and its Resolution. New York: St. Martin's Press, 1994. Print.

Essays --

The biological approach is a method that looks at our genetics to figure out a reason as to why one behaves in a particular way and why individuals develop abnormal behaviors. The biological theorists who study behavioral genetics study in what manner genetic influences effect behavior. Biological factors such as chromosomes have a substantial effect on humans and their behaviors. Most of what psychologists know about biological influences on personality is derived from twin studies. Twin studies examine and compare monozygotic (identical) and dizygotic (fraternal) twins. This is done because identical twins share the same DNA and are therefore predicted to share the same levels of specific traits. They are studied in cases where the twins are both reared together and separately to understand individual differences and similarities in personalities in these twins; in most cases even when the identical twins are reared apart they often are similar in regards to their career choices an d personality characteristics. While fraternal twins share about fifty percent of the same DNA which is about the same amount as non-twin siblings. The outcome of fraternal twins is similar to the outcome of individuals not born as twins, meaning the pair of DZ twins will have different personality traits (Holzinger, 1929). This demonstrates that although MZ twins are reared apart they still share the same personality traits because they are heritable. The biological aspect of traits is explained through genetics. Biology is the influence for most of the complex and intricate phenomena that occur within a human being, the same can be applied to the personality of an individual. The Big Five is a list of the five core personality traits that all indivi... ...onality model (Costa and McCrae, 1988). Without an appropriate caregiver to provide nurture a person can be high on neuroticism, and low on extroversion, openness to experience, agreeableness, and conscientiousness; meaning the person will be immensely psychologically unstable. Without stability and emotional support as a child, as an adult, an individual do not learn how to cope with the pressures of life (Bleidorn et al., 2010). This is apparent when individuals are extremely anxious, and self-conscious, introverted and displaying negative emotions about everything, not open to new experiences or people, has issues trusting others, and has little to no self-discipline (Rothbart, Ahadi, and Evans, 2000). A child that has been nurtured has been brought up in a positive and loving environment will have great psychological health and will be a stable/functional adult.

The Colossal Decision to Deploy an Atomic Weapon: An Individuals Impact on Society :: Essays Papers

The Colossal Decision to Deploy an Atomic Weapon: An Individual's Impact on Society Never before in recorded history has there been an event that has take so many lives in one instant. On the day of August 6, 1945 the first atomic device ever detonated was deployed on the city of Hiroshima, Japan. It is recorded that sixty percent of Hiroshima was destroyed in this offensive maneuver. Seventy-eight thousand human beings lost their lives at 8:15 a.m.1 The man directly responsible for this attack was the President of the United States, Harry S. Truman. While it is true that individuals are for the most part guinea pigs to society, there arises one striking exception to this rule: the leaders of our modern age. The impact this certain individual had on society is inconceivable, and to fully understand Truman's decision to drop an atom bomb on Hiroshima and Nagasaki, we must understand the momentous forces driving him to this means to an end. There were many different circumstances pushing Truman to his decision to use this secret weapon against the Japanese. There were moral issues, military issues, and of course Truman and his closely-knit circle of advisors had to examine the impact of this use of atomic energy on the future of our planet. In the end, however, the opposing forces proved slight enough for Truman to overrule. The first barrier to using a weapon of such destructive capabilities is personal morality. It would be very reasonable to think that it would be an impossibility for one person to authorize the destruction of so many others. This issue turned out to be one of small importance for Truman for many reasons. First, the American public had a moral advantage in that the Japanese bombed us first at Pearl Harbor. Also, as Truman himself stated, "†¦ was either that or the atomic bomb, and I didn't hesitate a minute, and I've never lost any sleep over it since."2 This indicates his main reason for not having any moral qualms with this bombing, the consequences if he didn't drop the bomb. The most important of these was the expected American casualties if we chose invasion over the bomb. However, if Truman new the greusome effects the deployment of this weapon would have upon the citizens of Hiroshima and Nagisaki, perhaps he would have hesitated. To see what the effects of the a-bomb on the people and buildings of Hiroshima and Nagasaki click here.

Distinguish between the processes of erosion and weathering in an area undergoing glaciation

Erosion is defined as the removal and transport of earth materials by natural agents and can be split into two main categories. Abrasion (or corrasion) is the glacier's use of angular debris, held by the ice, to scrape away at the underlying rock. Evidence of this in an area undergoing glaciation are scratches on rock known as striations. Plucking involves the glacier freezing on to blocks of rock and pulling them away. Meltwater will assist in this plucking process: pressure builds up behind a protrusion of rock and so causes melting. The meltwater penetrates any cracks and freezes around the rock (regelation) which is then pulled out by the glacier. Weathering is similar to erosion in that it includes the breakup of rocks, just not the transportation of the materials formed as does erosion. The specific definition of weathering is the breakup of rock due to exposure to the atmosphere. The weathering of a rock by freeze-thaw action (or frost shattering) may break up rock in periglacial conditions before glaciers advance. At the early stage of corrie formation freeze-thaw action and possibly chemical weathering will weather rock beneath the accumulating patch of snow (the process of nivation). During glaciation, meltwater will give rise to freeze-thaw action at the base of the glacier. Examine the impact of glacially eroded landforms on human activity â€Å"The impact of glaciation on human activity has been considerable both in lowland and highland areas. † (David Jones and Lawrence Kimpton 2000). This question focuses on how human activity has been affected by glacial erosion. The most recent glacial period began approximately 30,000 years ago and ended 10,000 years ago. At its peak 29% of the Earth's surface was covered by ice in comparison to 10% covered today. Sea level fell by at least 100 m and the beach was as much as 150 km further east along the Atlantic coast, thus forming land bridges between North America and Asia, which allowed for the migration of animals and humans to previously glaciated areas. Glacial eroded landforms include the features horns (pyramid shaped peaks), arites (knife shaped ridges), cirques (a bowl shaped depression found in mountains), erratics (boulders), valleys, tunnels and lakes. These landforms have affected human activity in various ways, including tourism, communications, farming and settlement and industry. Many upland areas that experienced the effects of prolonged glacial erosion during the Pleistocene have become important centres of tourism. Highland areas both those glaciated in the past and those with glaciers remaining today, are major areas of tourism because of the spectacular scenery and their suitability for winter sports. The Cirque-arete-trough landscape attracts hill walkers, scramblers, climbers, mountaineers, photographers, botanists, skiiers, snowboarders, hang gliders, painting, canoeing, sailing etc. In Britain, the Highlands of Scotland have become an important centre for summer holidays and winter skiing, whilst the National Parks of Snowdonia, the Lake District and Peak District are visited by millions of tourists each year. Areas such as the Lake District are increasingly popular for short weekend breaks. The attractions of these areas for tourism owe much to the effects of glaciation. The sharply defined peaks, deep U-shaped troughs and numerous lakes are all impressive landform features and provide these uplands with their attractive scenery. The rugged landscape appeals to many weekend hill walkers and mountaineers. The lakes which provide a range of activities -sailing, canoeing, swimming- and possess their own pleasant climates have become important centres of tourism. Large scale winter tourism is promoted in the Alps and similar locations by the existence of permanent snowfields and the heavy winter snowfall. Aviemore is one of the largest winter tourism centres in Britain with several ski runs on the upper slopes of the Cairngorms. Communications are also affected by glacially eroded landforms. Glaciated valleys offer natural routeways through high mountain landscapes and lower areas e. g. the Mohawk Gap that leads to New York. Settlement and Industry can hug the glacial trough floor, which often provide transport routeways. Many aspects of transport and communications -by land, sea and waterways -have been affected to a considerable degree by glacial action. In many upland areas, glacial breaches and troughs often form the only routeways suitable for communication by land. This situation is exemplified in the Highlands of Scotland where communications links by land north, and west of the Glen More are extremely difficult. Much of the land surface lies over 1000 metres above sea level, and consists of rugged mountains with steep, precipitous slope and badly drained moorlands. The presence of numerous lochs and fjords, hemmed in between high mountains, has effectively prevented any significant north-south routes being developed, even along the coast. Glacial breaches across the major watersheds form the only realistic routeways. Only two railway lines traverse the region -from Dingwall to Kyle of Lochalsh via Glen Carron and from Fort William to Mallaig via Lochs Eil and Ailort. All of the road links between Glen More and the west coast rely on glacial breaches which connect westwards and eastwards facing troughs. Glaciated highlands with high snowfalls present hazards such as avalanches. As the pressure of development increases, as in skiing areas, the impact of avalanches on people and settlements becomes greater. They are caused when the snow pack is destabilised suddenly by a loss of cohesion between naturally forming layers in the snow. Glacially eroded areas can lead to a channelled avalanche by which the avalanche progresses down a gully. Avalanches can block roads and railways, cut off power supplies and telecommunications and under extreme conditions, destroy buildings and cause loss of life. Therefore, glacially eroded landforms have impacted human activity, leading to management programs. For example Juneau, in Alaska, has a high avalanche risk. Many houses and businesses lie in the direct path of known avalanche routes and thus the various management schemes as seen above were discussed, and some put in place to protect the now habituated area. However, avalanches only present problems to certain areas. Slopes, for avalanches to occur, are usually greater than 22 degrees but less than 60 degrees, beyond which point it is unlikely that any significant snow pack will build up. Avalanches also tend to occur more often in spring when the temperatures rise and the snow pack has been accumulating all winter. Prosperity can be gained from the industrial development available due to glacially eroded landforms. Glacially eroded landforms offer scope for HEP production, with their steep, deep valleys for storage and rock lips providing sites for dam construction. Hydroelectric power (HEP) is the most widely used renewable form of energy. Although globally it accounts for only 6 percent of all electricity generated, in some countries it provides much more. Norway, for example, produces 96 percent of its electricity from HEP. The scale of HEP schemes varies enormously. In some Alpine villages, small HEP generators supply the power for a single house or hotel. At the other extreme, large HEP stations feed directly into the UK national grid. The advantage of HEP is that running costs are very low and power is instantly available. The main disadvantages are that initial building costs are high, the visual impact might damage the scenic value of a landscape, and the demand for energy is often some distance away. The positive impact of this on human activity can however have some negative impacts. Some ecological damage is also caused if the migratory routes of fish, such as salmon, are blocked. Fish ladders are sometimes built to avoid this problem. Also, when water passes through HEP schemes, the effect of the vertical drop can be to increase the amount of dissolved oxygen and nitrogen in the water. This can be harmful to fish, causing gas bubble disease. HEP in Britain is mostly generated in the glaciated uplands of North Wales, Cumbria and the Scottish Highlands. This is, because, firstly, mountain areas receive the highest rainfall in Britain. For a successful scheme to operate there must be a, reliable supply of running water otherwise the turbines will not turn. Secondly the physical relief is favourable. Glacial troughs, steep stream gradients, hanging valleys and lakes provide the ideal conditions. If natural lakes do not occur, glaciated valleys are relatively cheap to dam because they tend to be narrow and steep sided. Water which is used for HEP is not wasted, it then carries on down the valley. If the valleys are dammed, and the shape of the glacial troughs makes this very straightforward, then the water can be collected and sent to cities in areas of the country where there is perhaps not as much rain as in the highland areas. Glaciers impact human activity here by provide drinking water direct in some areas: rivers like the Rhine and Rhone are fed from glaciers. There is a fear that they may dry up if global warming melts the Alpine glaciers. People in La Paz, Bolivia have water from nearby glacier as public supply. People in the Rhone valley channel glacial meltwater to irrigate their crops. Llyn Peris is a moraine dammed overdeepened ribbon lake, and provides water for Llanberis in N. Wales. Lake Vyrnwy in mid Wales occupies a glacial trough which was flooded in 1889 by building a dam across the valley. Glacially eroded landforms affect human activity both positively and negatively. Avalanches expose inhabitants of the area to great risk, however, they still choose to live there. The positives include tourism, an industry which at present day is thriving and the attractions of these areas owe much to the effects of glaciation. HEP power provides areas with renewable energy and areas with drinking water and natural routeways are provided by glacial erosion.

Mission statement

This   essay   deals   with   three   mission   statements   of   human   service   organizations. It   evaluates   the   effectiveness   of   each, as   a   qualitative   mission   statement.  A mission statement is defined as , â€Å" a   brief   description   of   a   company’s fundamental purpose. A   mission   statement   answers   the   question, â€Å" why   do   we exist?’ It articulates   the   company’s   purpose   both   for   those   in   the   organization   and   in   the public†. ( Ward Susan )Statement 1   :The   first   mission   statement   chosen   for   this   essay   is   that   of   the   center   for   faith-  based   &   community   initiatives, Unites   States   department   of   health   and   human   services.  It   consists   of   three   paragraphs. The   first   paragraph   says   that   it   intends   to   create  an   environment   where   faith   based   and   community   based   organizations   are   invited  to   be   partners, â€Å" to   focus   on   improving   human   services   for   our   country’s   neediest  citizens †.The   second   paragraph   mentions   that   many   more   faith   based   and   community  based   organizations   have   been   made   partners, and   offered   technical   help   the   needy  citizens. It   also   says   that   it   has   collaboration   with   many   old   organizations   and   its  staff   is   trained   well   to â€Å" understand   how   to   reach   out   and   partner   with   these  organizations†.The   third   paragraph   states   that   it â€Å"provides   information   and   training,   but   does   not   take   decisions   on   which   groups   will   be   funded†. It   further   gives   web   links   for  more information.   Analysis   of   this   mission   statement   reveals   that   it   does   not   convey â€Å" what† is/are  the   real   functions   of   the   center. The   statement   has   words   which   have   too   broad  meanings, like â€Å" partners†, â€Å" collaboration†, etc. By   reading   this   statement   the   only  aspects   which   become   clear   are   that   the   center   makes   partnerships   with  Ã‚   faith   based   and   community based   organizations   to   help   needy   citizens   and   it   does   not   take   decisions   on   funding.Answers   to   what   type   of   â€Å" information   and   help† is mgiven   to   partners   is totally   missing. Giving   some   idea   of   specifics   of   functional   areas   would   have   added   a   lot   of   meaning   to   this   statement.( CFBCI )  An   hypothetical   example   will   prove   this. ‘A’ may   say   that   its   mission   is   to  Ã¢â‚¬Å" make   profits †. ‘B’ may   say, its   mission   is   to â€Å" make   profits   by   importing   crude  Ã‚  oil   and   selling   it   in   the   local   market†. The   second   is   a   much   better   mission  statement.  This   statement, though   very   long, is   a   bad   example   of   a   mission   statement.Statement – 2The   second   statement   is   the   one   issued   by   College   of   Liberal   Arts   and  Sciences, Villanova   University, Department   of   Education   and   Human   Services.  It    makes   clear   that   it   supports   the   Catholic   Augustinian   thought   tradition   and   it   treats   every   individual   on   the   campus   as   a   unique   human   being, working   with  one goal,   that   of   ‘ assimilation   of   knowledge’.   The   second   paragraph   tells   very   specifically   its   purpose   is   to   prepare   teachers,  human   service   providers, counselors, supervisors   and   administrators. This   is   achieved  through   theoretical   and   practical   exposures   in   school   and   community   settings. It  claims   that   each   of   its   graduates   will   have   a   commitment   to   social   justice,  cultivation   of   the   intellect, and   willingness   to   serve.This   is   an   ideal   example   of   a   good   mission   statement. Needless   to   say   that  assimilation   of   knowledge   is   the   mission   of   any   department   of   an   University, but  this   statement   further   clarifies   the   areas   of   knowledge   to   be  Ã‚   imparted, how   it   is  imparted   and   what   are   the   expected   results   of   its   mission. It   also   mentions   that   it  is   dedicated   to   the   Christian   Augustinian   faith.The   only   drawback   of   this   statement   is   that   the   language   and   the   vocabulary  bear   a   very   high   profile, especially   in   the   second   paragraph. The   message   can   be  understood   only   by   those   who   are   very   good   at   English. Perhaps, simple   words  and   shorter   sentences   would   have   been   more   effective. ( mission statement ).Perhap s, simplicity   communicates   the   best !!Statement – 3The   third   statement   analyzed   in   this   essay   is   of   an   association   names   as  PROTECT. Its   one   paragraph, very   short   yet   very   comprehensive   mission   statement  says   that   it   is   a   ‘pro   child, anti   crime   membership   association ’. It   is   founded   on  the   belief   that   the   first   and   most   sacred   obligation   as   parents, citizens   and   human  beings   is   to   protect   children   from   harm. Its   aim   is   to   build   a   powerful, non  partisan   force   to   protect   children   from   abuse, exploitation   and   neglect. It   is   also  clear   that   the   tools   adopted   to   achieve   its   goals   would   be   a   determined   single-issue   focus, aà ‚   meaningful   mainstream   agenda, and   use   of   proven   medical   political  strengths.This   is   one   more   example   of   a   good   mission   statement. It   gives   a   complete  picture   of   the   motives   of   the   organization. The   goals   are   clearly   stated   and   the  means   to   achieve   these   goals   are   also   very   clear. Some   more   clarity   could   have   been   added   if   the ‘ how ‘ part   of   the   statement   is   elaborated. Few   more   words   on  how   children   will   be   protected, will   make   this   an   ideal   mission   statement. The only  drawback   of   this   statement   is   that   it   does   not   mention   if   the   target   is ‘ children’  on   a   universal   base, or ‘ children’ of   a   speci fic   country   only. ( protect ).ConclusionA   mission   statement   is   judged   by   its   ability   to   put   across   the   main   function   of  an   entity. Out   of   the   three   statements   selected   for   this   essay, one   does   not  communicate   the   crux   in   the   minimum   required   depth. This   is   despite   the   fact   that  it   is   a   very   long   statement. The   other   two   are   very   brief   and   successfully   tell   the  main   function   in   a   very   brief   fashion. These   are   good   mission   statements. None   of  them   have   to   say   anything   else, apart   from   the   main   function.Works-cited   pageWard Susan, Mission   statement, about Inc. a New York Times Company, 2007, Retreived on 4 April 07 from:CFBCI, CFBCI mission statement, Center for faith based an d communityinitiatives, United States department of health and human services, 4 Dec 06,Retrieved on 4 April 07 from: < http://hhs.gov/fbci/ >Mission   statement, Department of education and human services, VilanovaUniversity,   2003,   Retrieved on 4 April 2007 from:< http://www1.villanova.edu/villanova/artsci/education.html  > Mission statement This   essay   deals   with   three   mission   statements   of   human   service   organizations. It   evaluates   the   effectiveness   of   each, as   a   qualitative   mission   statement.  A mission statement is defined as , â€Å" a   brief   description   of   a   company’s fundamental purpose. A   mission   statement   answers   the   question, â€Å" why   do   we exist?’ It articulates   the   company’s   purpose   both   for   those   in   the   organization   and   in   the public†. ( Ward Susan )Statement 1   :The   first   mission   statement   chosen   for   this   essay   is   that   of   the   center   for   faith-  based   &   community   initiatives, Unites   States   department   of   health   and   human   services.  It   consists   of   three   paragraphs. The   first   paragraph   says   that   it   intends   to   create  an   environment   where   faith   based   and   community   based   organizations   are   invited  to   be   partners, â€Å" to   focus   on   improving   human   services   for   our   country’s   neediest  citizens †.The   second   paragraph   mentions   that   many   more   faith   based   and   community  based   organizations   have   been   made   partners, and   offered   technical   help   the   needy  citizens. It   also   says   that   it   has   collaboration   with   many   old   organizations   and   its  staff   is   trained   well   to â€Å" understand   how   to   reach   out   and   partner   with   these  organizations†.The   third   paragraph   states   that   it â€Å"provides   information   and   training,   but   does   not   take   decisions   on   which   groups   will   be   funded†. It   further   gives   web   links   for  more information.   Analysis   of   this   mission   statement   reveals   that   it   does   not   convey â€Å" what† is/are  the   real   functions   of   the   center. The   statement   has   words   which   have   too   broad  meanings, like â€Å" partners†, â€Å" collaboration†, etc. By   reading   this   statement   the   only  aspects   which   become   clear   are   that   the   center   makes   partnerships   with  Ã‚   faith   based   and   community based   organizations   to   help   needy   citizens   and   it   does   not   take   decisions   on   funding.Answers   to   what   type   of   â€Å" information   and   help† is mgiven   to   partners   is totally   missing. Giving   some   idea   of   specifics   of   functional   areas   would   have   added   a   lot   of   meaning   to   this   statement.( CFBCI )  An   hypothetical   example   will   prove   this. ‘A’ may   say   that   its   mission   is   to  Ã¢â‚¬Å" make   profits †. ‘B’ may   say, its   mission   is   to â€Å" make   profits   by   importing   crude  Ã‚  oil   and   selling   it   in   the   local   market†. The   second   is   a   much   better   mission  statement.  This   statement, though   very   long, is   a   bad   example   of   a   mission   statement.Statement – 2The   second   statement   is   the   one   issued   by   College   of   Liberal   Arts   and  Sciences, Villanova   University, Department   of   Education   and   Human   Services.  It    makes   clear   that   it   supports   the   Catholic   Augustinian   thought   tradition   and   it   treats   every   individual   on   the   campus   as   a   unique   human   being, working   with  one goal,   that   of   ‘ assimilation   of   knowledge’.   The   second   paragraph   tells   very   specifically   its   purpose   is   to   prepare   teachers,  human   service   providers, counselors, supervisors   and   administrators. This   is   achieved  through   theoretical   and   practical   exposures   in   school   and   community   settings. It  claims   that   each   of   its   graduates   will   have   a   commitment   to   social   justice,  cultivation   of   the   intellect, and   willingness   to   serve.This   is   an   ideal   example   of   a   good   mission   statement. Needless   to   say   that  assimilation   of   knowledge   is   the   mission   of   any   department   of   an   University, but  this   statement   further   clarifies   the   areas   of   knowledge   to   be  Ã‚   imparted, how   it   is  imparted   and   what   are   the   expected   results   of   its   mission. It   also   mentions   that   it  is   dedicated   to   the   Christian   Augustinian   faith.The   only   drawback   of   this   statement   is   that   the   language   and   the   vocabulary  bear   a   very   high   profile, especially   in   the   second   paragraph. The   message   can   be  understood   only   by   those   who   are   very   good   at   English. Perhaps, simple   words  and   shorter   sentences   would   have   been   more   effective. ( mission statement ).Perhap s, simplicity   communicates   the   best !!Statement – 3The   third   statement   analyzed   in   this   essay   is   of   an   association   names   as  PROTECT. Its   one   paragraph, very   short   yet   very   comprehensive   mission   statement  says   that   it   is   a   ‘pro   child, anti   crime   membership   association ’. It   is   founded   on  the   belief   that   the   first   and   most   sacred   obligation   as   parents, citizens   and   human  beings   is   to   protect   children   from   harm. Its   aim   is   to   build   a   powerful, non  partisan   force   to   protect   children   from   abuse, exploitation   and   neglect. It   is   also  clear   that   the   tools   adopted   to   achieve   its   goals   would   be   a   determined   single-issue   focus, aà ‚   meaningful   mainstream   agenda, and   use   of   proven   medical   political  strengths.This   is   one   more   example   of   a   good   mission   statement. It   gives   a   complete  picture   of   the   motives   of   the   organization. The   goals   are   clearly   stated   and   the  means   to   achieve   these   goals   are   also   very   clear. Some   more   clarity   could   have   been   added   if   the ‘ how ‘ part   of   the   statement   is   elaborated. Few   more   words   on  how   children   will   be   protected, will   make   this   an   ideal   mission   statement. The only  drawback   of   this   statement   is   that   it   does   not   mention   if   the   target   is ‘ children’  on   a   universal   base, or ‘ children’ of   a   speci fic   country   only. ( protect ).ConclusionA   mission   statement   is   judged   by   its   ability   to   put   across   the   main   function   of  an   entity. Out   of   the   three   statements   selected   for   this   essay, one   does   not  communicate   the   crux   in   the   minimum   required   depth. This   is   despite   the   fact   that  it   is   a   very   long   statement. The   other   two   are   very   brief   and   successfully   tell   the  main   function   in   a   very   brief   fashion. These   are   good   mission   statements. None   of  them   have   to   say   anything   else, apart   from   the   main   function.Works-cited   pageWard Susan, Mission   statement, about Inc. a New York Times Company, 2007, Retreived on 4 April 07 from:CFBCI, CFBCI mission statement, Center for faith based an d communityinitiatives, United States department of health and human services, 4 Dec 06,Retrieved on 4 April 07 from: < http://hhs.gov/fbci/ >Mission   statement, Department of education and human services, VilanovaUniversity,   2003,   Retrieved on 4 April 2007 from:< http://www1.villanova.edu/villanova/artsci/education.html  >