Observing the Role of Homeostasis in the Body after Exercise

Observing the role of homeostasis in the body after exercise Biology (T): Functioning Organisms Biology Practical Report 0383210 Mrs Woinarski Due 14th November 2012 Introduction: Homeostasis plays a vital role in the maintenance of a normal environment in which bodily systems are able to function most efficiently. The importance of homeostasis can be seen in blood pressure and pulse rate, as measurements which are not in the normal range can create serious health problems. Exercise has a known effect on both of these systems, as it results in a rise in body temperature and dilation of blood vessels, as well as an increase in breathing rate.By measuring how these rates return to normal levels after exercise demonstrates homeostasis in the body, and helps to describe the ways in which the endocrine system and organs involved impact this. Aim: To demonstrate the role of homeostasis in reaching normal levels for pulse rate and blood pressure after an increase due to exercise and investi gate which of the relative feedback systems works faster to achieve homeostasis. Apparatus: Stopwatch 1. 5m Skipping Rope Electric blood pressure monitor Method:Using the electric blood pressure monitor, both blood pressure and pluse rate were measured at a resting level for the first participant. In an open area, participant was asked to skip 100 times using rope, without any break. Immediately afterwards, the stopwatch was set and the blood pressure and pulse rate of the participant were measured using the blood pressure monitor and recorded. Using the stopwatch to see time after exercise, blood pressure and pulse rates were measured again at t=1, t=5 and t=10, where t equals minutes after exercising.The entire process was completed on each participant individually. Results: Raw Data Table 1: Results for Participant 1 Time (t) |Pulse rate (bpm) |Blood pressure (mmHg) | |-1 |88 |105/67 | |0 |140 |135/119 | |1 |128 |138/69 | |5 |108 |113/63 | |10 |96 |109/66 | | Table 2: Results for Participant 2 Time (t) |Pulse rate (bpm) |Blood pressure (mmHg) | |-1 |90 |100/70 | |0 |150 |130/100 | |1 |120 |120/82 | |5 |100 |112/75 | |10 |93 |103/70 | | Table 3: Results for Participant 3Time (t) |Pulse rate (bpm) |Blood pressure (mmHg) | |-1 |81 |112/68 | |0 |100 |120/93 | |1 |95 |117/90 | |5 |91 |113/81 | |10 |80 |110/69 | | Table 4: Results for Participant 4 Time (t) |Pulse rate (bpm) |Blood pressure (mmHg) | |-1 |92 |126/79 | |0 |92 |154/65 | |1 |92 |143/67 | |5 |92 |131/60 | |10 |92 |125/71 | | Table 5: Results for Participant 5 Time (t) |Pulse rate (bpm) |Blood pressure (mmHg) | |-1 |86 |80/55 | |0 |90 |85/67 | |1 |89 |85/67 | |5 |87 |83/68 | |10 |83 |79/53 | |Processed Data Discussion:The results of this experiment effectively demonstrate the role of homeostasis in returning both pulse rate and blood pressure to normal rates after exercising, as can be seen in the trends in the data provided. As seen in graphs 1, 2 and 3 the trend was a peak in both blood pressure and pulse rate immediately after exercise, followed by a slower decrease to normal levels. Pulse rate, as seen in graph 1, changed quite dramatically in participants 1 and 2 after exercise, and although this same peak is not so obvious in participants 3 and 5, they show a similar pattern.The difference in scale of change here could be affected by many uncontrollable variables, such as the participants’ fitness levels. However, by comparing each participant’s results to their resting levels, an accurate description can be made. Participant 4 is, in this case, an anomaly, as exercise did not have any effect on their pulse rate (Table 4). Graphs 2 and 3 show the participants’ change in blood pressure as a result of exercise, separated into systolic and diastolic blood pressure measurements.Again, a peak can be seen immediately after exercise as blood is being forced throughout the body to supply nutrients to muscles which have just been used, shown in both systolic and diastolic rates. Blood pressure returns to normal through a homeostatic process after exercise, as a result in the changing size of blood vessels. After blood pressure had returned to normal, in the majority of participants, it then in fact continued to decrease slightly before creating a new resting level. This is a result of the dilation of blood vessels, which then move more easily through arteries. Conclusion:In conclusion, the process of homeostasis in returning to normal levels of blood pressure and pulse rate after exercise have effectively been demonstrated. The different speeds at which these homeostatic processes are completed are a result of the endocrine feedback systems involved. Sources of error in the experiment are the limited results obtained as a result of time constraints. For a more accurate outcome, more participants should be tested so that any anomalies can be disregarded, and each participant should be tested multiple times to obtain average results as a way to avoid any mechanical errors.As the same device was used to test the blood pressure and pulse rate of each participant, mechanical error was reduced, however multiple tests would have improved the results. Bibliography: ‘Homeostatic mechanisms’ 2012, WestAustralian Government, viewed 10 November at http://tle. westone. wa. gov. au/content/file/ea6e15c5-fe5e-78a3-fd79-83474fe5d808/1/hum_bio_Science_3a. zip/content/003_homeostasis/page_05. htm Hardy, Richard N. 1983, Homeostasis, 2nd ed, Edward Arnold, London ———————– [pic] [pic] [pic]

Karl Marx and Max Weber Different Views on Capitialism

Karl Marx and Max Weber speak about capitalism and social class. They both agree that modern methods of organization have tremendously increased the effectiveness and efficiency of production. However they both have different concept of theories. Karl Marx speaks about Alienation and Critique of Capitalism . Marx argued that this alienation of human work is precisely the defining feature of capitalism. He regards alienation as product of the evolution of division of labor, private property and the state: When these phenomena reach an advanced stage, as in capitalist society the individual experiences the entire objective world as a conglomerate of alien forces standing over and above them. Marx with Hegelian notion of alienation but developed a materialist concept. For Marx the possibility that one may give up ownership of one’s own labor, one’s capacity to transform the world- is tantamount to being alienation from ones own nature; it is a spiritual loss. Marx noted that alienation can only be overcome by revolutionary abolition of the economic system based on private property. In his â€Å"Preface a Contribution to the Critique of Political Economy†, Marx had expressed this economic dialectic by saying that it was when â€Å" the materials productive forces of society† came into conflict with â€Å" the existing relations of production† that historical upheavals resulted ( Marx, 1976,page 3. ). Marx critique of capitalism is that it still produce inequality, reduces family relationship, destroys small business, enslaves and reduces all human relations to commercial relations. Marx states that, for the bourgeois man, the wife is reduced to a mere instrument of production. Moreover, once the exploitation of laborer by the manufacturer has finished, then he is set upon, says Marx by other segments of the bourgeoisie the landlord, the shopkeeper, the pawn broker in bourgeois society â€Å"capital is independent and has individuality, while the living person is dependent and has no individuality (Marx and Engels, 1952, pages 51, 53, 65-70). Marx critique of capitalism was dialectical. He regarded capitalist society as an unprecedented historical advance from centuries of benighted feudalism. In 1848 Karl Marx wrote the Communist manifesto which was a formal statement of the communist party. The history of all Hitherto existing society is the history of class struggles and we find it everywhere a complicated arrangement of society into various orders, manifold graduation of social rank, (Cohen and Fermon, 448). Marx believed that throughout the past the great societies of the world have all experienced class struggles in all their internal conflict. Marx felt that the class struggle that exists in illustrated class distinctions in both ancient histories. Marx explained in ancient Rome we have patricians, knights, plebeians and slaves; in middle ages, feudal lords, vassals, guide masters, journeymen and apprentices. (Cohen and Fermon, 448). Marx makes this point to show that if a knight fought a slave then it was a class struggle, the oppressor vs. the oppressed. In the term of social class Marx’s theories postulate that the owners or means of production exploit those who produce goods and services, while the working class becomes alienated consumers. Most of it centered upon what has been described as Marx’s oversimplification of the dialectical approach in which history is described as little more than series of conflict between the owning and working classes. Capitalism is the idea of a company or corporation owning and controlling all means bourgeoisie control the socioeconomic system and has the proletariat work under them, if the proletariat wanted change; it was not possible because of how the system was designed. In order to gain a capitalist society, the bourgeoisie must first take complete control of the situation and become distinguished owners in a society. After they own a big and successful corporation they then have workers in which they train and make their workers believe that in order to survive they must work and brainwashing the workers mind, this is all they will know how to do and will teach their children to do the same, therefore letting the main owners continue to remain the main owners of society. Marx understood this struggle between these two classes, he knew this soon would become unacceptable to workers and they would come to realization of the inequity in their society. Max Weber theory of class is that capitalist and the proletarian meet in a market and come into it in different ways as purchaser of labor power and as seller, as someone able to wait, not compelled to buy or sell merely to survive another day that’s the capitalist and as someone who must sell his services today or starve. Therefore Marx two classes, in Weber view are distinguished essentially by their relation to a market and precisely by their bargaining power. Bargaining power is matter of monopoly or lack of it. Weber then analyses class mainly in terms of â€Å"monopoly†. To Max Weber, writing in the early 1900s, Marx’s view was too simple –he agreed that different classes exist but he thought that â€Å"Status† or â€Å"Social Prestige† was the key factor in deciding which group each one of us belongs to. Where we live, our manner of speech, our schooling, our leisure habits, these and many other factors decide our social class. He thought that the way each person thinks about his/her â€Å"Life Chances†- if we feel that we can become a respected and highly valued member of the society, then this is likely to put us in higher social class than some others. Max Weber his studies of rationalization in the Protestant Ethic and the Spirit of Capitalism (1985) in which he argued that the redefinition of the connection between work and piety in the Protestantism that shifted human effort towards rational efforts aimed by achieving economic gain. He later works, notably his studies on bureaucracy and on the classifications of authority into three types: legitimate, traditional and charismatic. In these works Weber described what he saw as society’s movement toward rationalizations. Weber believed that alienation document by Marx little to do with ownership of the mode of production but was a consequence if bureaucracy. Antony Giddens in his Introduction to the Protestant Ethic in and the Spirit of capitalism (1985) says Weber’s work can be approached on several levels. It can see as a specific historical thesis, claiming a correlation between Calvinism and entrepreneurial attitudes, or a casual analysis of the influence of Puritanism upon capitalist activity. It can also be viewed as an interpretation of the origins of the key components of modern Western society as a whole. It can also be seem finally as part of an attempt to identify divergent courses in the rationalization of culture. Weber’s view was that religion answered man’s need for a coherent account of his situation. He focused on religion ideology, in particular the Protestant Ethic and how it brought about rationalization of conduct in everyday life. His ideas had unanticipated consequences foe economic development. Weber was concerned with â€Å"the influence of those psychological sanctions which originating in religious belief and practice of religion gave direction to practical conduct and held the individual to it† Karl Marx and Max Weber in Social Class Most societies throughout history and the world have developed a notion of social class. It is refers to hierarchical distinctions between individuals or groups within society. How these social classes have been determined has been a common topic among social scientist throughout time. Two individuals who have headed this long standing debate are Karl Marx and Max Weber. In this section we will compare and contrast Marx and Weber’s theories on social class; how they determined, their interest and problems that may exist among groups. Marx first sets up his arguments on class by referring to the historical class struggles. â€Å"Freeman and slave, patrician and plebeian, lord and serf, guild-master and journeyman in a word, oppressor and oppressed (n, d: 474). He believes society has spilt into two classes know as the Bourgeoisie and Proletariat. This is a key point because he defines class by their control over the mode of production. The mode of production refers to the specific organization of economic production in given society. A mode of production includes the means of production o used by society, such as factories, facilities, machines and raw materials. The Bourgeoisie is those in control of the means of production while the Proletariat must sell their labor. This was referred to as the market exchange value and was reflected in wages. The Bourgeoisie in this society tries to extract as much surplus value as to keep them alive and productive. This capitalist mode of production was the basic of class struggle. The worker or Proletariat approaches work as a mean of survival and not personal satisfaction because the products of labor no longer belong to him. â€Å"Modern industry has converted the little workshop of the patriarchal master into the great factory of the industrial capitalist. Masses of laborers, crowded into the factory, are organized like soldiers. They are daily and hourly enslaved by the machine, by the over looker and above all the individual bourgeois manufacturer himself (Marx: 479). † With the growth of industrialization the specialized skills of individuals are no longer useful all of those who do not own a means of production are forced into the Proletariat class. Competition between these workers allows wages to fluctuate often and working conditions worsen. To better these situations the Proletariat form trade unions to keep up rate ages. He believes humans meet their needs of existence by using labor as a sense of wee being. In this capitalistic system of private ownership the workers are robbed of their self worth and identity. The worker is estranged from the products he creates which will lead to revolution. This idea of revolution is where the objective and subjective interests of class’s interests may be objectively determined. An outsider observer should be able to determine a course of action for someone within that class. In the case of the proletariat it is in their objective interest to revolt. The reason for this is that most of the individuals within this class group want better conditions of life and work. They want better job security, improved wages and inexpensive consumer goods. The only way to achieve this goal would be revolt, forcing things to change. The problem lies within their subjective class interests which are on a more personal level. The members of the working class believe the bourgeoisie is acting in their best interests and to achieve financial well being they just need to continue to work hard, competing with one another. Some positives of Marx argument is the idea of class exploitation. He believes that proletariat should revolt due to the goals of the bourgeoisie. He refers to this struggle as the oppressed and the oppressor. This common historical theme of the oppressed and oppressor is covered thoroughly in his argument and he uses a good economical model to show this struggle. In this case it is the working class versus the owners. This type of societal dynamic can be mapped out in most societies. It can be the parent versus the child, boss versus worker, coach versus player, teacher versus student or any other situation in which one may feel oppressed by another. A Marx idea of class interest is a good basis of social protest and provides the ability to fight exploitation. An obvious negative part of his argument is the simplistic idea of class. He places everyone within two categories and this isn’t so easy. There is an example of the person who runs the factory in which the working class provides labor for. This supervisor can be seen as a member of the working class but does not participate in such manual labor and have such harsh working conditions and is paid more. On the other hand Max Weber had a problem with Marx’s simplistic view if social class distinctions. He believed that more factors went into determining ones social class along with there being more than two classes. Weber states â€Å"The way in which social honor is distributed in a community we may call the social order† (n. d. :181). This social honor is made up classes, status groups and parties. Power may also be derived from prestige or property but do not always run hand in hand. Rich people tend to be more powerful than poor people as well as being held in high regard more often. Property may bring prestige but it an also come from athletic or intellectual ability. Karl Marx and Max Weber in Capitalism Karl Marx and Max Weber, both born in 19th century and after comparing their sayings and way each one was thinking and analyzed the case of capitalism in societies an affair that still remains a main condition nowadays. Sociology stands through the years on what important persons (Weber and Marx) said in the past and most of others’ ideas are builded that o capitalism and industry, which is still relevant and linked somehow to capitalism. As we all may have realized in modern society through experience and facts, routine is something that we get used to it from the early years of our existence and routine is what we actually repeat like a music, either weekly or yearly or it might be even more frequently (e. g. daily). In such a period of time, our programmed is full of work, duties, responsibilities, leisure activities and many other tasks that could give as a living, a living which needs a bit everything in order to survive. During our lives (which are bombed daily from useless information) through the past years decades years, â€Å"we† (on behalf of our ancestors) changed that way we view, the way we face, we acknowledge, we define and accept the reality in the way it is. Having an income just for living is not our main goal but it is just one of those many targets we have, probably for a promise to help our families to help our families but still not the main one. In the past, many decades ago, having your home fully or somewhat with just the appropriate furniture could give you a prestige that meant something for the rest of the people in the whole society. Ti could integrate you in a higher social class and make you more acceptable from an larger scale â€Å"audience†. In the modern society social class changed criteria while now a person who is not working is faced off as an insignificant human being. Unfortunately this happens again even if a person works, but his or her job is not a â€Å"chic† one, like a top manager etc. Life aims to easy entertainment buying things etc, as consumption is the â€Å"central role† of life; and because of that people want to buy and use their available time not only for working but also for having a â€Å"personal ife† which everybody has and deserves, society started working more â€Å"in ordered to be to afford to buy goods, services, ideas etc†. This need of everyone who wants to work (for his or her own personal reasons each one), brought to the industrial society the concern of capitalism. Working environments changed as human and natural collapsed. Capitalism is the new â€Å"fashion† of every single developed modern society. Capitalism is the field of battle of social classes, the reason of which people with economic case, â€Å"rich† people getting richer and poor, poorer. People with money started giving job opportunities to people with less money and want to work, to people who appreciate life and its advantages and want to live it with pride, respectability and honorableness. In that way,† rich† people where (they are still) using the elbow grease of others in order to earn more money and others where taking just a little income to survive with their families. Here, the two important persons mentioned before, two worldwide know sociologists of 19th century come to give their personal perspective on the fact of capitalism. Max Weber believes that capitalism is not a significant problem and do not reprehend it as Karl Marx. Weber believed that capitalist development â€Å"depended on the systematic application of impersonal rules and regulations in the pursuit of people with money, lead them in the inhuman laws of work which wanted people working (in the past and modern society) in sweatshops for a piece of bread and â€Å"mangers† (they) or people owing the machinery and all required things needed, sitting and waiting for their own income against poor people’s elbow grease. In that sense, Karl Marx theory is quite similar with Weber’s. As mentioned before, Karl Marx believed stronger than Weber that capitalism it was a problem with high significance. He believed that when capitalism occurs, social classes are somehow mixed up and a disparity of them appears in society. He faced in part capitalism with emotional way, trying to give to the workers hope and certitude. Exploitation of workers was the biggest effect of capitalism and as capitalism was continuing exploitation would not only follow but being increased. Weber’s thesis was supporting the opinion that while capitalism continues, capitalists would benefit more (earnings) but workers wouldn’t earn ever more than what they need to reach the survival level. These cause workers to loose their personality. Capitalism is cause of this case. It’s the main issue and many sociologists tend to analyze it such persons were Marx and Weber

Upland environments are too fragile for intensive leisure use

When looking at upland environments I will need to define what is an upland environment. The difficulty which I found was that it was very hard to define what an upland environment is therefore I questioned four geography teachers of what they thought was an upland environment. They replied that an upland environment is an environment, which is above 200 meteres, and these can include national parks and mountain resorts. Intensive leisure use is an area where a lot of leisure activities are taking place by day-trippers. Fragile is a word which describes an area where a lot of activities are taking place but they having a bad effect on the environment therefore making it unsustainable or that environment is easily destroyed by the activities which are taking place e. g. leisure activities. Leisure activities on national parks both have a positive effect and a negative effect. An example of a positive effect maybe its good for a person health and a negative effect could be destruction of footpaths but what should be done is that upland environments need to be made more sustainable therefore they won't be fragile for intensive leisure use. In this essay I will be looking at national parks and mountain resorts in MEDCS and not in LEDCS, as national parks in these countries need more protection from tourists rather than one-day trippers. Also only upper-class people in these countries can afford to visit national parks and rest of population are far to poor to afford the transport and many are too busy working in order to have a living of some kind. The motorways and railway networks are not as good in LEDCS as they are in MEDCS. When I am looking at MEDCS national parks and mountain resorts. I will be looking at the impacts that leisure activities have had on upland environments. I will look both at the positive and negative effects of leisure activities and look at ways in which it could be more sustainable. Finally I will give conclusion whether or not upland environments are too fragile for intensive leisure use. The first area, which I will be looking at, is a national park in the UK. The national park, which will be looking at, is the peak districts and a village called Castleton. Castleton is a honey pot during the months of April- August it receives up to 900 visitors on Sundays. Already you can see the problems that are going to occur. The visitor numbers are so high on Sundays because many people have a day off work on Sundays and the motorways M1 and M62 are very close which makes it easier for people to travel to peak districts and nowadays nearly everyone can afford a car to travel unlike LEDCS where many people cannot afford the transport and do have high disposable income. The cities of Sheffield (493582) and Manchester (438202) are also very close so many of the one day visitors could come from there. This is another reason for the high number of visitors. The months between April and August is that weather conditions are likely to be good for leisure activities to take place therefore more visits are likely to occur putting pressure on the environment. To make it more sustainable they need to make the winter months more attractive and appealing therefore this would even out the number of visitors and less pressure on the environment and less leisure activities wouldn't only be taking part in the spring and summer months. The leisure activities, which take place in the peak district national park, are as follows sightseeing, hiking, riding, cycling, climbing, caving, hang gliding and canoeing. The impact that hiking and site seeing have is that they destroy the footpaths and therefore footpath erosion takes place and heather and other plants are destroyed and litter may be thrown anywhere. What needs to happen is that people need to be aware of these factors like in Malham there are no bins and people have to take the rubbish away themselves. Climbing and caving have another impact as white powder is left on the rocks which climbers use in order to have a better grip. This can erode rocks and the hooks left behind can crack the rocks. Hang gliding is another leisure activity which affects the environment as it takes along run up and this activity doesn't fit the environment it cause visual pollution. The second region, which I am going to look at, is the Banff National Park in Canada and in a state called Alberta. Over 75% of the visitors are Albertianins and the access is made easy by road, railway, buses and plane services to this area. In addition people now have their own cars than they did about 75 years ago this may have resulted in more one day trippers coming to the area. The popular times of the year are the summer months particularly August and September this is similar to the Peak Districts. There are restrictions placed on all visitors as they are charged fees to enter the park in addition there are camping permit fee and a permit fee for fishing unlike the peak Districts as there are no fees for doing these activities. Furthermore there are very dangerous animals such as bears and cougars that could attack the visitors therefore visitors need to be educated about these animals when they are sight seeing. These restrictions do not exist in the peak districts. The leisure activities taking in the Banff National Park are very similar to those of the peak Districts. The leisure activities taking place as follows skiing, snow boarding, other winter sports, sightseeing, hiking, canoeing and camping. Skiing does make the environment more fragile as deforestation has occurred in order to make way for ski runs. This results in habitats being destroyed and more avalanches are going to occur as there are no trees stop them. This could result in more deaths but could benefit them economically as more people are going to spend money on skiing. It will depend on the cost benefit. In order to make more sustainable less trees need to be cut down and winter sports have the same effect as skiing. Hiking and sight seeing may also destroy the footpaths in the park like in the Peak Districts in addition it could disturb the wild animals and plants may be trampled over. Camping may lead to litter thrown everywhere on the grass and this can affect the environment by bear coming getting into the litter either by chewing on coke can or eating ploythene wrapper for sandwiches in addition a fire could occur which result in the destruction of the whole park. This has happened in national parks in the US again destroying habitats for animals and beautiful scenery. The third region I am going to look at is the Mountain resort in north-western region of Italy. It is an alpine region. This region receives a lot of visitors and the main attractions are the skiing resorts. Skinning has brought positive effects to the area and people now have better jobs that are paid more than farming and forestry. Also the standard of living has improved for the local people. Roads, water supplies and sewerage have been improved. The problems that are occurring in this area, is that due to a high demand for skiing more enlarged ski runs are being built but this means that deforestation has occurred at the mountain slopes and furthermore there is an increase in the number of winter sports which has resulted in mountain top soil being eroded away and alpine vegetation has been reduced. All of these actions have resulted in more avalanches as trees have been cleared to make way for the new ski runs. Also the danger flooding has substantially increased during the summer thunderstorms or following snow melt in spring. There are other climatic problems such as some winters the snowfall is light, late in arriving and not lying long at low altitudes which has resulted skiing at higher levels were the environment is more fragile. I will conclude that having looked at each of the different regions for upland environments I have said that upland environments are too fragile for intensive leisure use unless they are made sustainable. Castleton in the Peak Districts needs reduce the number of visitors in the summer either by adding fees. The roads and the vehicles cannot cope with the amount of vehicles in the summer months although efforts have been made to attract visitors to the during the winter months by adding lights furthermore there needs to be a reduction in the number golf courses. At the moment money is brought to the area by these leisure activities but once the environment is destroyed no one will come to the Peak District therefore the economical benefits will disappear. This also goes for Courmayeur as the skiing has brought economical benefits to the area as less people are leaving but once the environments destroyed then the visitors will not come therefore economical benefits will go. People can make National Parks and mountain resorts sustainable now or if they do not make them sustainable then for the future they will be destroyed by the leisure activities taking place and their knock effects in addition to this economic benefits will disappear as well. Evaluation The research, which I have carried out, is secondary research and Primary research could have occurred but I did no have the time and money to go and visit the Banff National Park or Courmayeur. This major downside of this report as the data gathered for primary would have been more accurate and up-to-date.

Cancer Essay Example | Topics and Well Written Essays - 1250 words - 5

Cancer - Essay Example There are many different types of cancers originating in the human body owing to the different types of cells in the body. A few examples of cancers are skin cancer, lung cancer, prostate cancer and breast cancer. Cancer is an abnormal multiplication of the cells which may originate in any cell of the human body owing to the lack regulatory processes and this pathological state can be treated by different treatment modalities (Kumar et al 2005). Under the microscope, cancer cells reveal different structural characteristics because of which they can be differentiated from the normal cells of the body. They are pleomorphic in nature, which means that they have a tendency to have a variable size and shape which is not in accordance with the normal cells. The cancer cells have different size and different shapes. Most of the cancer cells have large nuclei in comparison to the surrounding normal tissue cells and the nuclei of the cancerous cells contain abnormal number of chromosomes, a condition known as aneuploidy. The aneuploidy may occur due to a mutation or deletion of a chromosome. The cell membrane of the cancer cells produces surface enzymes which have the ability to damage the basement membrane of tissues. This characteristic assists in the spread of the cancer from its site of origin to the surrounding non-cancerous cells and damages them as well. The cancer cells show increased rate of mitosis. Mitosis is the process of the reproduction of the new cells and hence the cancer increases in its size and crosses its boundaries to spread out of its confines. The cancer cells have differences in metabolism in comparison to normal cells. Their metabolism is more anaerobic and therefore they may even combat hypoxic conditions. The cancer cells have the propensity to spread from the primary cancer site from where the tumor begins to grow to the adjacent normal tissues. This phenomenon is

The Body Shop Saga by Anita Roddick Essay Example | Topics and Well Written Essays - 500 words

The Body Shop Saga by Anita Roddick - Essay Example The first Body Shop, painted an appropriate green, opened in 1976. Roddick's timing was excellent. The first Earth Day had been celebrated in 1970, with the participation even of corporations such as the chemical and petroleum industry giants Monsanto and Texaco. There was growing international consciousness on issues related to the environment and sustainable development. People's desire and determination to "do something" about these problems produced the social movements of the 80s and beyond. Green business proved to be good business It made people feel good that they had not only bought good products but supported causes such as the famous saving the whales movement. The "business with principles" marketing strategy obviously worked. By 1992, the business was valued at 700 million pounds. By 1992 Body Shop shares were being sold at 3.72 pounds at the London stock exchange. At that time they were known as "the shares that defy gravity." (Entine 2002) Who could know that by 2006 t he shop built on corporate social responsibility (CSR) would be sold to L'Oreal, a player in the high-end beauty industry, that is 26% owned by Nestle. Roddick and The Body Shop from the very beginning expressed its stand against animal testing. The most salient points of the 1999 and 2002 report â€Å"revealed a huge ethical gap between BSI's marketing image and its actual practices†¦This deception†¦is pervasive: Roddick stole the Body Shop name and marketing concept, fabricated key demands of the company myth, misrepresented its charitable contributions and fair trade programs and has been beset by employee morale and franchise problems. Moreover, its "natural" products are filled with petrochemical colorings, fragrances, preservatives and base ingredients such as mineral oil and petrolatum.†Ã‚  

Describe the architecture and building of El Escorial Research Paper

Describe the architecture and building of El Escorial - Research Paper Example On its south were five cloisters which included the royal palace and other offices. The northern part comprised of the living quarters of the monks. The complex design was of two architects, Toledo and Herrera who was credited with the completion of the building after revising the plans laid by Toledo (Herrera et al. 1990). The interior is composed of massive walls that were relieved by Doric pilasters without the concession to the decorative richness. This produced a serious monument beyond any Italian Renaissance ever imagined. On the exterior part, the monastery’s gigantic scale and the plain gray granite walls appears very unfriendly. This design was established by Herrera and named it the Herrera style and was to prevail in Spain for a period of fifty years. The granite complex also memorializes the first military victory and the defeat of the French on 10th august 1557. This particular day was also the San Lorenzo’s day and thus the name San Lorenzo de El Escorial. On the other hand, the rectilinear complex which has several internal courtyards is exhibited on the grill where San Lorenzo was murdered. The building’s floor plan takes a kind of a gridiron. This design had a traditional belief that was based on the honor of St. Lawrence who was murdered by being roasted on a grill. The origin of this layout is somehow controversial. The El Escorial is not by any chance made unique by the grill like shape. Several buildings have been found to take the same shape with numerous interior courtyards. This shape had fully emerged after Herrera had eliminated it from the original conception of the six interior towers. The Temple of Solomon design was the basis of the El Escorial. This was extensively modified for the purpose of accommodating the additional functions intended by Philip II. The building therefore, was intended to serve many purposes which also contributed to its design. It was

Winning Military Battle Article Example | Topics and Well Written Essays - 3500 words

Winning Military Battle - Article Example The researcher has taken this research as an opportunity to study the results of the battlefield in relation to the leadership style. Different aspects of this research proposal are as follows: This study will be primarily based on secondary sources. This research will help to find out factors responsible for the success of a leader. The research has been designed in such a way that it meets all the research objectives set by the researcher. The first researcher tried to identify the area of research and set his objectives and aims from this research. The next step was to analyze various data collection tools and methods. In this particular research, researcher felt that the objectives can be meet the best with secondary research methods. Leadership is all about leading a group of people to a certain direction t accomplish common goals or achieve common objectives as chosen by the leader. A leader can influence his followers, motivate them to do certain tasks, bring people together and ensure the contribution of all his followers for the well-being of the overall community. Leadership can vary based on the controlling factors of the leaders. A leader can be from a political background, military, religious group, business, education and many others. The important factor is leaders’ ability to influence and motivate their followers. Leadership can be formal or informal. Leadership in an organization can be formal types where people are initially abiding to listen to their bosses whom they find good enough to follow later on. In informal leadership, a leader may not have any formal relationship with his followers, but they have influenced their leader and follow him. Leaders have an impact on the psychology of peo ple. They have the ability to provoke thoughts and ideas in the minds of people. A leader can be highly educated or with basic knowledge and practical approach. A leader can be result oriented or charismatic. He can develop role models for others to follow.  

The Tourism Industry of Dubai Essay Example | Topics and Well Written Essays - 2500 words

The Tourism Industry of Dubai - Essay Example Dubai is known internationally as one of the premier tourist destinations of the world, especially among the high-income and elite group of tourists. It is also regarded as one of the richest places in the world where Dubai is always desired for mass tourism. There is apparently an endless variety of vacation opportunities in this part of the world with positive intervention and support from both government and industries. Notably, the government of UAE aims at developing Dubai as the chief tourist destinations in the world, making use of its unique tourism features operating as a differentiated tourist hub and thus obtaining the competitive advantages of almost no close substitutes. The place is considered as the jewel of UAE because of the fact that it offers luxury, sumptuousness and outstanding facilities to the tourists with a magnificent blend of tradition and modern cultures. It has been observed that outstanding hotels, shopping malls, and skyscrapers are the well-known chara cteristics of Dubai. It has been further viewed that Dubai offers great opportunities and verities for all potential tourists in accordance with the taste of the people visiting the city. It has also been noted that the shopping malls of Emirates situated in this place provide a variety of options to the customers from fashion to home furnishing. Furthermore, Dubai also focuses on developing its sports tourism industry sector facilitating various sports through Ski Dubai resort and other similar amenities (Henderson, 2006).... Gigantism engaging huge amounts of money had been the vision of tourism in Dubai owing to which many prominent projects of tourism development have raised significant threat to the scarcity of natural resources. Apart from environmental threats, the city is also affected by regular governmental intervention from the national and international levels, which is often termed as the ‘War Zone’. It is worth mentioning in this context that US military forces had been operating in Dubai, using the city as a vital base to perform spying activities on Iran, which has significantly influenced tourism rates within the city. Money laundering has also been a mostly debated issue in Dubai. Moreover, Dubai is also criticised for the slavery related issues. Behind the ultra modern and luxurious hotels of the city, there lies a dark world where slavery is still being practiced. Issues related to forced labour are also seemed to be quite significant in the city. Irrespective of such issue s, Dubai had been able to maintain its peace avoiding any considerable terrorist attacks and rendering due scope to attract a variety of tourists from around the world (Davis, 2007; Keane & McGeehan, 2008). Emphasising these characteristics of the tourism market in Dubai, the paper would intend to evaluate the extent to which the city deciphers or rather illustrates the features of modern urban tourism. The intention of the paper will be thus concentrated on connoting if Dubai presents a new paradigm of urban tourism. Discussion Illustration of Dubai as a Tourist Place Dubai is known internationally as one of the premier tourist destinations of the world, especially among the

War Powers Resolution In Libyan Case Research Paper

War Powers Resolution In Libyan Case - Research Paper Example The Congress also has the power to affect the public opinion. Still, practice is different from theory. In practice, the US Congress has little power to influence the president’s decisions. Moreover, despite President Obama’s statements, the US actions in Libya constituted a war. Whether the US went to war against Libya is still a much contested issue. The administration never made any formal declaration. According to the Independent Civil Society Report (2011, p.19), the US engaged in an international armed conflict against Libya, together with other NATO member countries. Though divided on this topic, many members of Congress and experts viewed the US intervention in Libya as constituting a war. However, most experts still agreed that the US engagement in Libya did not fall under the War Powers Resolution and the Constitution. They referred to previous practice of interventions on behalf of the US presidents. The President did not act against the power and authority of the Congress. Most experts agreed that hostilities were present in Libya, but that the President’s actions were neither unconstitutional, nor in violation of the War Powers Resolution. The President circumvented Congress. Congress, on the other hand, was left quite powerless since the intervention was funded independently of the Congressional decisions. Thus, this paper will also depict how the President circumvented the War Powers Resolution. Statements by experts such as Ackerman, Hathaway and Fisher will be consulted to show how theoretically, President Obama violated the resolution. Spiro and Koh will be used, together with the Office of Legal Counsel to depict how practice has made President’s actions legal. Background of the Libyan Conflict Five years after a brutal crackdown on a public protest in Benghazi, the Libyan authorities witnessed their own demise. Every year since then, on 12 February Libyans commemorated the ‘Day of Rage’ (Amnesty International 2011, p.7). Fearing the spillover effects of neighboring revolutions in Tunisia and Egypt, activists and writers were arrested prior to the demonstration. However, instead of preventing the disaster, the authorities infuriated the general population. Academics, commoners and businessmen all joined in their outcry for justice and end to an abusive, forty à ¢â‚¬â€œ year – old rule by Colonel al-Gaddafi (Amnesty International 2011, p.7). Protests spread from eastern Libya to the rest of the country and became violent. By the end of February, eastern Libya and parts of the Nafusa Mountain and Misratah were under the control of the opposition (Amnesty International 2011, p.7). By 19 or 20 February, armed conflict spread across the country (Independent Civil Society 2012, p.11). Shelling of the opposition – held cities and disappearances of journalists and intellectuals intensified

Leadership and Management Style at Google Research Paper

Leadership and Management Style at Google - Research Paper Example According to Daft and Lane (2008, p.17), leadership develops â€Å"a compelling vision for the future and creates far-sighted strategies for producing the changes† required to achieve that vision. Thus, while leadership requires an eye on the long-term future, management calls for a focus on the bottom line and short-term results.   Shared Leadership at Google â€Å"Google’s goal is to organize the world’s information† (Duin & Baer, 2010, p.35). The company is ahead of schedule to meet its high target. The previous Chief Executive Officer at Google, Eric Schmidt has been replaced by Larry Page. In 2001 the Board of Directors of the company had brought in Schmidt to supervise the then 27-year-old founders Larry Page and Sergey Brin. For one decade, Google’s management structure was described as a three-ring circus with the co-founders Page and Brin running the business behind the scenes, while Schmidt formed the public face. Currently, the three ma nagers who were equally involved in making decisions mutually agreed on Page taking the stage. Eric Schmidt stated that the earlier â€Å"triumvirate approach had real benefits in terms of shared wisdom† (Schermerhorn, Osborn, Uhlbien & Hunt, 2011, p.299) and that they would continue to discuss the big decisions among the three of them. At the same time, they decided to clarify their individual roles to ensure clear responsibility and accountability among the management and leadership of the company. The main aim is to simplify the leadership structure and speed up decision making. Thus, Larry Page leads product development and technology strategy, his greatest strengths; and as Google’s Chief Executive Officer is also in charge of the company’s day-to-day operations. Sergey Brin as co-founder focuses on strategic projects and new products, while the previous CEO Schmidt â€Å"serves as executive chairman working externally on deals, partnerships, customers, an d government outreach† (Schermerhorn et al, 2011, p.299). The company’s leadership is confident that this focused approach would serve Google and its users well in the future. It is acknowledged that Page’s taking over the company’s management is at an ideal time. Google’s business is doing well, with the revenues of $29.3 billion showing an increase of 24% from the previous year, and profits rising high. However, the concern is for the future rather than for the present. There is a sense that Google’s best days may be over, with the company facing tough competition from Facebook and Microsoft, and losing top talent to younger tech shops.

Both Spirited Away and Pan(TM)s Labyrinth Essay Example for Free

Both Spirited Away and Pan(TM)s Labyrinth Essay Both Spirited Away and Pans Labyrinth represent the traditional family unit as an important part of a childs life. How do the two films convey these messages to the audience? Hayao Miyazakis Spirited Away (2001, Japan) and Guillermo Del Toros Pans Labyrinth (2006, Spain) are both feature length films which delve into the journey of a young female character experiencing their own personal journeys to achieve different goals. This is achieved by the aid of supporting characters who take on the roles of those in a traditional family. This may include a mother, father, siblings and others. The traditional family unit in Spirited Away is absolutely essential to the development of the piece. Chihiro, the main protagonist, throughout the film is on a journey to maturity. At the start, she is represented as a very naà ¯Ã‚ ¿Ã‚ ½ve and insignificant person. For example, towards the start of the film we see a low-angle shot from behind Chihiro, looking up at the bathhouse. Just this camera shot already suggests to the audience that the director is portraying her in a stereotypically childlike light; she is wandering into the unknown with a complete lack of self-awareness. In contrast, towards the end of the film, we see Chihiro reach a new level of maturity. If we look at how she reacts to her parents driving her away from her home, friends, and everything that she had become accustomed to; she complains about it, and generally acts childish in her actions, for example when we see her father point out her new school, at which point she sneers and pokes her tongue out at it t hrough the car window. We can compare this directly to when Chihiro journeys, by train, to return a gold seal to Zeniba. The decision to go was completely self-motivated, brought about solely by her own feelings of responsibility. This in itself conveys messages of maturity. Although we have almost exactly the same situation as at the start of the film in the car (she is travelling to an alien destination), this time she has an awareness of where she is going, and has chosen to take the journey herself. This path of maturity becomes an imperative aspect to acknowledge when looking at the supporting characters and their significance. During the film, her parents are taken away from Chihiro, and she is left alone. However, this triggers a traditional family unit to form around her. From my observations, these surrogate family members include Lin, taking on the big sister role, Yubaba, taking the role of a grandmother and Kamaji assuming the father/grandfather/uncle figure. The character of Haku whose relationship with Chihiro is possibly one of the most significant, is also the most debatable and perhaps the hardest to define as part of a family unit. Looking at the character of Lin, her influence on Chihiros development is more than apparent. From the moment that Chihiro becomes employed in the bathhouse, her contact with Lin is very much of a sisterly nature; they share the same daily routine, eat together, sleep together,live together. Being the younger of the two, she would naturally default to mimicking her in everything she does, exactly as a stereotypical older/younger sister relationship would operate, especially concerning their work in the bathhouse. We see this when Chihiro notices how Lin uses the bath tags in a certain manor to receive water from the boiler, and then later when she takes on the task of cleaning the stink spirit, she remembers this and makes use of it several times in order to finish the job at hand. This shows advancement in Chihiros independence and ability to adapt to the situation given in the workplace, and these skills are learned directly from Lin. Again, this is undeniable evidence suggesting t he importance of a sister figures contribution to the traditional family unit. In the absence of her real mother, Yubaba as the only mature female character in the piece, becomes the obvious choice of surrogate mother/grandmother for Chihiro. The first introduction of Yubaba as a mother/grandmother figure is her naming/re-naming of Chihiro to Sen, like a mother christening her child. The importance of this act is that giving Chihiro a new name in this workplace, which only an adult experiences, is a disciplinary act, giving her a completely different identity, almost forcing Chihiro to become someone else. As in every traditional family, if children are spoilt, they never mature, but if they are disciplined along the way by their mother, they learn respect, appreciation and other such skills. This is another vital step for Chihiro to take on her path to growing up, induced entirely by Yubaba. However we also have the part of Zeniba, who takes on a similar role to Yubaba but in a more affectionate and understanding way. In a stereotypical parental unit there wil l always be the affectionate side and the disciplinary side in order to ensure a childs good upbringing. Kamajii, the boiler man, is conveyed to us as the audience in such a way that we immediately recognise him as very experienced, kindly and possibly wise. Although he is a rather removed character in the film, only appearing infrequently, he is only ever welcoming in nature, helping Chihiro at any obstacle that should arise, but at the same time diligently carrying out his work. We see this when he is grinding all sorts of different herbs and spices on his pedestal, but voluntarily he pretends that Chihiro is his granddaughter and requests that Lin takes her to see Yubaba for work. All of these are the traits of a father, however, due to his absence in the film as a whole, he is more like a grandfather, and actually refers to Chihiro as his granddaughter near the beginning of the film. We see this when Chihiro is desperately trying to find a way to get to Zenibas place, and Kamajii offers her his only train ticket there. Again, although a seemingly small contribution, everybody needs a bit of stability and support, much like Chihiro did here, and this is exactly what Kamajiis fatherly character offers. Haku, being one of the first characters which Chihiro meets within the film, immediately becomes important to her; a lost child in real life would latch on to the nearest compassionate figure, and when Haku finds Chihiro, this is precisely what happens. More than that; however, particularly in such unfamiliar surroundings, this boy being the first person that she meets and him even rescuing her from death, forms a unique relationship between the two, which lasts throughout the film. It is because of this that Chihiro possibly cares about him more than any other character in the film, and certainly, Haku cares for her more than any other character. We see this several times, for example when Chihiro notices Haku, as a dragon, flying into a window of the bath house, in a bloody state. Chihiro is desperate to try and help Haku, and chases him up to Yubabas room to do this. The significance of this, is that due to these romantic or otherwise feelings, Chihiro was shown by Haku how to care for someone at the start of the film, and in the example given, she mirrors Haku in this, giving direct evidence to suggest that Haku, interpreted as a family figure or not, is still a massive influence in Chihiros personal development. So the ideology of this film seems to, certainly, be that a strong family unit is absolutely vital for the development of a child. In Pans Labyrinth, our central character is the young Ofelia, and we are straight away shown a typical parent-child situation with her mother Carmen in the backseat of a car; Carmen is telling Ofelia that she is too old for books and fairy tales. We can suggest that probably the most prominent development in Ofelias character, throughout the film, is how she becomes notably more courageous, in a rebellious manner. This is not necessarily to say that Ofelia doesnt demonstrate courage and self-determination towards the beginning of the film, for example, she independently wanders off into the labyrinth to find Pan the faun quite early on the piece. However, if we particularly observe her actions towards the Captain, her step-father, as the piece progresses, Ofelia, without doubt, feels more confident to rebel against him with more audacity, and greater consequence. For example, Ofelia seemingly unintentionally offers the Captain her left hand at the start of the film, a comparatively m inor act of disrespect, but nearing the end, she even has enough daring to go so far as to steal her baby brother from his room. There is plenty of evidence to suggest that the main heroine in the film develops due to supporting characters taking on family orientated roles, much in the same way as in Spirited Away. What does differ though is that Ofelia actually has her real mother for the majority of the piece although her presence fades throughout the film, she is still present. This distinction is vital to acknowledge as a mother figure, for a young girl, will probably the most influential person in the shaping of their own character. Her mother aside, our traditional family unit members include Mercedes, as a big sister/mother role and Pan, as the only possible fatherly figure the piece. Much like in Spirited Away, where Yubaba is instantly recognised as an evident adult figure, due to her being introduced in the workplace and her business-like nature, we can also instantly identify Carmen as an adult because she is portrayed as a mother above all else in the film, being in her pregnant state. In terms of Carmens impact on Ofelia, the main citation to be made is how Carmen shows devotion to her children, which Ofelia learns, and employs later in the film. For example, we see how Carmen marries a man, who she debatably doesnt even love, in order to bring a safe environment to her children, showing a great deal of affection to her children. Even though all logic would lead Ofelia to care very little about her brother, (he is the cause of her mothers death and Captain Vidals son) she ends up giving her life for him at the end of the film, almost mirroring her mothers actions, proving to the audience that Ofelia has gained skills from her mother, conveying messages of massive importance upon the part of a motherly figure in a traditional family unit, relating directly back to the question. The character of Mercedes is without question, the most appropriate person to take on a sisterly role for Ofelia. We can quite easily make the connotation that, due to Mercedes and Ofelias almost identical circumstances (they are both at the mercy of the captain), Mercedes can simply be described as an older version of Ofelia. Furthermore, both of these characters close relations come to harm at the hands of the captain. We see this when the captain instructs the doctor that, if the baby can be saved, then Carmens welfare is negligible. Also Mercedes comrade, one of the Guerrilla rebels, is eventually tortured by the captain and killed. Ofelia in fact looks to Mercedes as more of a role model after her mother dies, and possibly identifies her as a secondary/replacement mother figure. Much like in Spirited Away, Ofelias loss of parentage leaves her with no choice but to latch on to the nearest affectionate character, here being Mercedes. So overall, Mercedes greatest contribution to Ofelias development is that of displaying courage, particularly in rebelling against Captain Vidal, which Ofelia learns from and mimics, much like a younger sister would do. We see this quite clearly when Mercedes seeks out Ofelia and tries to escape with her near the end of the film. After Carmens death, Mercedes is Ofelias new role model, Ofelia goes on to steal the baby from the captain, a courageous, and rebellious, skill learnt directly from Mercedes, the evident sister figure in the piece. Pan, the faun, is a very interesting character in terms of analysis. It is he who actually opens up this supernatural world to Ofelia, which is what makes him interesting, because he could be interpreted as a character which does not develop Ofelia, but actually completely the opposite, simply due to the fact that he widens this supernatural world, which Ofelia creates through her childlike imagination. This can be seen by the way that he sets out a task for Ofelia in order to become Princess Moanna of the underworld, and stay a child forever. Conversely, Pan, being a seemingly authoritative figure in this strange world, actually makes rules within this world i.e. he tells Ofelia that these various tasks must be completed in a certain fashion e.g. he instructs her not to touch the fruit in the second task. Be this imaginary or not, this makes him become an embodiment of discipline for Ofelia, taking on the role of a replacement father. This is very similar again, to Yubabas role in S pirited Away. Laying out rules for Ofelia in each of the tasks that he sets her, forces her to independently mature and stick to the rules, very unlike the actions of a child, clearly benefiting her. Because nobody seems to step in and take the role of Ofelias father, it is rather convenient that it is Pan who induces Ofelia to rebel against the Captain, steal the baby, and for the final goal to re-unite Ofelia with her real father. This is so significant in the sense that, this is very likely exactly what a stereotypical father would do if one were still present. Relating back to the question, if we remember that the only missing member of Ofelias family unit is a father, Pan could well be Ofelias attempt at completing this broken family unit through her imagination. If we then look at what this suggests about the ideology of Pans Labyrinth, it seems to me that it could suggest the same as Spirited Away but also, when taken out of the comfort zone of a strong family unit, it can actually force a child to mature in a greater way than with one. Through close analysis of both films, it has become clear that children crave the stability that the traditional family unit provides. They also thrive in it. Both central female characters in each film, undoubtedly piece together some kind of family in whatever way they can, in the absence of their actual family members. However it has also become apparent that people around characters who lack stability, are without question, drawn to filling those roles. When looking at the evidence given for each character explored in the two products, it would be a huge understatement to say that each member of the traditional family unit doesnt have a massive impact on the central protagonist. The two films convey the messages of family importance in such a way that without the supporting family characters whose roles are taken on within each piece, the actions and development of both Ofelia and Chihiro in their respective films would both be completely different without the presence of these characters.

From Fossil Fuels to Renewable Energy Essay Example for Free

From Fossil Fuels to Renewable Energy Essay The gas pump. As of late, it has been the bane of drivers everywhere. With the prices of crude oil skyrocketing combined with the prices at the pump and nearly everywhere else, many people are looking toward renewable energy sources to supplement or replace the use of fossil fuels. This interest in renewable resources has generated new energy policies around the world, has spawned new energy technology and has produced ideas on a different way of living. Adding to the interest is the awareness on humanity’s impact on our environment, there is so much interest that the United States and many other countries have started to explore the option of producing power by the cleanest sources possible. However, it may not be enough. With the threat of oil reserves being used up and the energy crisis unresolved it is imperative that the United States begins to utilize solar, wind, and hydroelectric power in an effort to decrease the dependency on fossil fuels. Many people notice the rising costs of just about everything. The rising costs are due to the rising cost of energy. Nearly everything in our economic system requires energy to create, to ship, to stock, or to provide and the energy costs are passed down to consumers. The price for energy has not been terribly high in the past, but now the price is rising. One look at your electric bill will tell you that energy, however inexpensive it is to make or obtain, does not come cheap; at least, not anymore. The price of fossil fuels, not just in a monetary sense, but in an ecological sense is taking a toll on the country and the world. Acid rain, carbon dioxide and global warming are all consequences of cheap acquisition of energy. Coal supplies a large part of the energy needed to produce power in US and is one of the largest sources of energy in the world (Energy Perspective, Walter Deal 2006), but strip mining ruins the landscape, destroys ecosystems, and when burned causes acid rain. Oil has been this country’s, and the majority of the world, most used form of energy for years. From powering our vehicles and homes to creating lubrications and solvents, its uses are prolific. But we’re are now faced with the possibility of oil supplies becoming scarce, and it has everyone jumping out of their pants to find a better source of energy. Combine this with the fact that the by-product of using oil (carbon dioxide) is practically burning a hole in out atmosphere and we have a doozy of a problem. Enter renewable resources. Why have we not thought of this before? What has kept the US, and indeed the world, from investing in renewable resources much earlier? The answer is technology. The green energy has always been there, but the capabilities to harness the forces were not advanced enough to take advantage of it. Perhaps it still has not reached that level yet but we are getting close. For years, people have used the sun for a variety of things: warming things, lighting torches, burning ants, and to cook. The energy radiated by the sun is phenomenal. In fact, the energy the sun shines onto the earth daily is enough to supply the world’s yearly energy needs (National Geographic, 2008). This energy potential of sunlight was not lost on seventeenth century scientists. In 1873, William Adams and Richard Day found that when selenium was exposed to sunlight it created a low charge of energy, though it could not power anything (US Dept of Energy, 2008). Later on, in 1908 William Bailey invented the solar panel whose design is extremely similar to the solar panels used today. Solar energy technology, while not developed enough to harness the full power potential of sunlight, has been used consistently since the mid-1960’s to power satellites, spacecrafts, electronics, cars and homes through the use Photovoltaic cells (US Department of Energy, 2008). The Photovoltaic cell, which produces electricity when light strikes the cell causing an electron imbalance, has gone through numerous transformations to make the cell as efficient as possible. There are solar plants littered across the country, most notably in Kerma, California where they use the Photovoltaic system to supplement Pacific Gas and Electric’s electric grid during peak power usage (US Dept of Energy, 2008). These cells can be used in homes across the country and the current technology has created a Photovoltaic cell that is more durable, flexible and easily maintained. In addition to Photovoltaic cells, parabolic trough mirrors, parabolic dishes and power towers use mirrors to direct the sunlight to a specific area where it is used to create steam, that steam is then used to create electricity (The Economist, 2008). Now SolarReserve, a development firm partnered with United Technologies and US Renewables Group, has designed a system that will capture and store sunlight for several days. The system is similar to traditional capture of sunlight by using mirrors to direct sunlight to towers where molten salt is kept, usually a collection tower. The salt is heated by the sunlight, which can then be stored or used immediately. Since molten salt is an efficient heat carrier and storage medium, it can create energy on demand or stored for later power production thus solving the problem of power generation during cloudy or stormy days. SolarReserve first demonstrated this technology at their site in Barstow, California and states that the technology is ready to be used for power production on an electrical grid (Wald, New Ways to Store Solar, para. 13). The benefit of this type of solar technology, and other solar power production, is that the fuel source is free. The acquisition of sunlight requires no drilling, no decimation of land and no major disruption of fragile ecosystems. Solar power is also a clean energy source, giving off no emissions in addition to being abundant and renewable. Sunlight also creates another renewable resource. Wind. The power of wind has been harnessed to irrigate, to grind grains, and to produce electricity. Turbines here in America only provide 1% of the electricity consumed, but the potential for the wind industry is huge. Several countries around the world use wind as a portion of their power generation. Denmark, for instance, generates 20% of their energy from wind. Spain has generated 8% of their power from wind and they are expected to raise that number in the next year (Greenpeace, 2008). Early wind turbines were used to grind grain and to bring water to irrigate crops, now the turbines are created to crank out electricity. Wind farms are cropping up everywhere; just recently T. Boon Pickens announced that he was partnering with General Electric to build the world’s largest wind farm in Texas (The Economist, 2008). This partnership comes about due to the suddenly lowered costs of turbine production. Couple that with the fact that, aside from the cost of construction, the generation of the electricity is free and (theoretically) will not go away, you have a deal of a life time. Current turbines have become more reliable than earlier ones; they are easily built and generate power as soon as they are up. Some snags manufacturers of turbines and the electric companies have come up against are the questions of storage, the issue of visual impact or noise pollution, and the effect turbines have on animals. Electric grids have traditionally used alternating current to transfer power to the grid; however, the location of turbines can sometimes be remote places, which can mean that power is lost in the transportation to the grid. The non-traditional idea of using direct current has cropped up, since direct current travels well over long distances and there is less power loss, using direct current grids to transport the power to areas where the energy can be used effectively solves the transportation dilemma (US Department of Energy, 2008). The use of DC instead of AC forces a change in the way power is transported on a grid and although many balk at the idea, Europe has already a similar system in place and plans on extending it to the United Kingdom. The system pushes power to the grid and channels excess power to help push water uphill to Norwegian hydroelectric systems. While wind has been making leaps and bounds in technology and production, the hydroelectric systems in Europe and most of the world have helped power these countries for years. In reality, hydropower has been used for centuries around the world and it had been used in ancient Greece to turn water wheels to grind wheat into flour (US Dept of Energy, 2008). The water wheel is probably the most well known way of producing energy from water, and it was this early application that spawned the idea for current turbines. The amazing thing about water is that it is perpetually recycling itself. It is evaporated into the air from oceans and streams then comes back to the ground to start the process all over again. This process is what makes hydroelectric power so attractive. Unfortunately, although hydroelectric power accounts for one fifth of the world’s power generation and is the cheapest source of energy, the building of dams can displace wildlife and destroy ecosystems. There have been some advances to making dams more eco-friendly though. By building fish ladders and developing aeration techniques, installations can have a minimal impact on wildlife and the environment (National Geographic, 2008). There are even some technologies that are being developed to harness the power from ocean waves. With mechanisms similar to wind turbines, the energy in the ebb and flow of the tides is captured to produce clean energy. Unlike wind energy, tidal energy is constant and easy to predict, which makes â€Å"coordinating the flow of electricity in the grid quite manageable† (Holzman, 2007 para. 7). Tidal turbines are also easier on the eyes. Whereas wind turbines and solar plants may mar a skyline, tidal turbines are generally not visible at all. While you may see commercials and ads touting the beneficial effects of renewable energy going on right now, the generation of clean power is not an immediate process. It is going to take a lot of hard work and a great change in lifestyle to accomplish it. Although there are many companies working hard to provide the technology or the means to produce clean power, consumers can help by investing in green energy. Many utility companies offer a green power program that allows consumers to donate a portion of their power bill to the research and development of clean energy (Environmental Protection Agency, 2008) and consumers can get tax credits for energy efficient home improvements. Although renewable resources such as solar, wind and hydroelectric power may be expensive at the outset, the use of clean energy will pay for itself in terms of environmental impact, and especially its renewability. Because it is not a change that will happen over night, it is important for consumers to remember that they too can assist in investing in the future of renewable resources. By donating a small amount every month through their power company a consumer can help his or her utility company pay for the additional costs that are accrued in using green power and the new technologies to generate green power. If a change is to come, everyone has to be on board and willing to change their lifestyles from the current â€Å"throw away† lifestyle. Change for the better has to come from consumers as well as the pioneers of renewable energy. References The power and the glory: A special report on energy (2008). The Economist, 387(8585), 1-14. Deal, W. (2006, May) Energy Perspectives: Another Look at Fossil Fuels, The Technology Teacher, 65(8), 10-14 Greenpeace: Global Wind Energy Outlook. Retrieved July 2, 2008, from http://www. greenpeace. org/international/press/reports/globalwindenergyoutlook Hydropower: Going With the Flow. Retrieved July 6, 2008, from http://science. nationalgeographic. com/science/environment/alternative-energy/hydropower-profile. html Wald, M (2008, April 15). New Ways to Store Solar Energy for Nighttime and Cloudy Days. The New York Times. Retrieved July 2, 2008, from http://www. nytimes. com/2008/04/15/science/earth/15sola. html? _r=1ref=businessoref=slogin US Department of Energy: Solar Technologies Program. Retrieved July 6, 2008 from http://www1. eere. energy. gov/solar/photovoltaics. html US Department of Energy: Wind Hydropower Technologies Program. Retrieved July 6, 2008 from http://www1. eere. energy. gov/windandhydro/ Holzman, David C. Blue power turning tides into electricity. Environmental Health Perspectives 115. 12 (Dec 2007):

Nuclear Power Versus Renewable Energy

Nuclear Power Versus Renewable Energy One of the biggest problems that we face in todays modern power hungry times is the decision on a single source of power. As we continue to consume as a society we are very quickly burning through our supplies of fossil fuels to the point at which in a couple of decades we will have all but exhausted existing supplies. It is for this reason that decisions need to be made on what source will generate future generations electricity. The future of energy production will lie with the criteria set out by fossil fuel energy production and how well they fit these criteria. Any new fuel source will have to be readily available and provide a constant supply of energy; it will need to be cheap and safe to produce; the same or fewer emissions than that of fossil fuels, although with todays current eco standards the later will probably need to be true. One particular source of energy seems the logical choice for the main replacement for fossil fuels and that is nuclear power, but how do other more renewable sources of energy compare to nuclear power? In 2002 it was reported by an MIT study that nuclear power supplied 17% of the worlds electricity consumption [1] and if this is compared to renewable sources such as wind power, geothermal and biomass generators which accounts for just 19% as calculated in 2008 [2]. The aim of this paper is to compare and contrast the viability of different energy sources for the future. What is nuclear power? Nuclear power in its current state is the controlled fission of radioactive material for the generation of electricity. Nuclear power uses Uranium primarily as a fissible material, the first safety issues come from obtaining a source of uranium that is viable to use for energy generation. Uranium occurs naturally in a compound ore form, comprised of 99.3% U238 and 0.7% U235 [3]. Uranium 238 is not a suitable isotope for fission, infact in its natural ore it prevents the uranium from sustaining any sort of nuclear reaction. This can be explained by the energy of absorbed neutrons in the nuclear material, U235 will undergo fission at all energies of neutrons, but U238 will not. To overcome this problem, uranium ore needs to be enriched with a higher percentage of U235 (usually so that U235 comprises 3% to 5% of the ore [3]). The enrichment process introduces safety issues that are not present in other forms of energy production, the process produces uranium hexafluoride that is a highly toxic chemical that is difficult to store due to its corrosive nature. The main waste product is depleted uranium that the radioactive waste from extracting U235 from natural Uranium ore. There has been much controversy over Depleted uraniums use as a weapon and its difficulty in being stored due to its radioactive nature, current estimates put global stockpiles of depleted uranium at 1.5 million tonnes [3]. The generation of power from radioactive sources makes use of a compound nuclear reaction. Neutrons are absorbed by enriched uranium, usually a uranium ore composed of mainly U235, which forms an excited compound nucleus. A compound nucleus will be inherently unstable and result in the fission of the excited compound nucleus and emission of two new nuclei and neutrons. Figure 1 illustrates a possible nuclear reaction inside a nuclear reactor: Figure 1- Example of nuclear reaction. n+U235 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ U*236 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ Xe139 +Sr95 + 2n As can be seen from figure 1 the example fission reactions require a single neutron to induce fission of U235 but the final products of the reaction include 2 neutrons which allows the reaction to become self perpetuating, this neutron feeding process is known as a chain reaction. This chain reaction will only occur in enriched uranium. Nuclear power is generated using two different types of reactor that both have their merits and faults with regard to safety: The fast reactor is a reactor based on an equal mix of Uranium 235 and 238 that can sustain the chain reaction required to generate energy. Fast neutrons, hence the name, sustain the reaction, in the case of the fast reactor neutrons interact with U238 whicch forms a nucleaus that does not under go fission but forms plutonium 239 instead. Although Pu 239 is able to undergo fission, it does not do so at the speed required to sustain the chain reaction and infact most of it becomes unused waste in the form of spent fuel. The fast reactor is designed to navigate around this by using the fast neutrons to produce more fissile Pu239 than spent Pu239 by not using a moderator to slow neutrons down this reduces the problem of producing lots of unused fuel as waste. Because this type of reactor does not use a moderator to control neutrons and due to the highly fissile material in the reactor core, it does require an efficient cooling system which does introduce certain safety issues. Fast reac tors require a liquid sodium coolant, chosen due to its highly conductive nature, to remove heat from the core. The use of sodium though has its associated risks because its highly reactive and becomes corrosive when reacting with air which is obviously a problem when surrounding a radioactive core. Thermal reactors use enriched uranium to produce energy instead of an equal mix and the enrichment produces the waste products as discussed earlier. Unlike fast reactors which do not use moderators thermal reactors, and the ones in question use a moderator and coolant. In the case of Pressurised water reactors and boiling water reactors they both use water as a coolant and moderator due to waters inherent property that it is a good neutron absorber. The water based thermal reactors are one of the most widely used nuclear reactors due to the availability and safety of the coolant and moderator. There are contamination risks with the boiling water reactor, as water is pumped through the reactor and boils it will pick up fragments of radioactive contaminants which could be released into the atmosphere via the cooling towers. For note the worlds largest nuclear power plant uses 7 different boiling water reactors to generate electricity and is capable of generating a total of 8,212MW and a typical fossil fuel turbine is capable of generating 1000MW so a typical fossil fuel plant can be compared to outputting a similar amount of energy to that of a nuclear power plant [3b]. Safety of Nuclear Power With the explosion of the Chernobyl nuclear power plant and the recent meltdown risks of the Fukushima reactors safety concerns are always inherent when discussing nuclear power. Meltdowns are often a buzz word when associated with nuclear power plants and is often the biggest safety concern when considering nuclear power, but what exactly is a nuclear meltdown? A nuclear meltdown is not as serious as the word suggests or as the world media have suggested. A meltdown will occur when there is more heat inside the reactor core than that being removed by any coolant mechanism that are put in place. If this does happen then the nuclear fuel will literally melt causing it to melt through the reactor. This will result in damage to the reactor core and a possibility of the fuel escaping the reactor, but nuclear reactors are contained within a containment structure that is designed to prevent any radioactive material from contaminating the atmosphere and allowing coolant to be pumped into the structure. This only becomes an issue when the containment structure is damaged as was the case during the Fukushima earthquakes, with the exception of natural disasters modern nuclear power plants are designed with the up most safety in mind and have many different precautions in place to prevent and exposure and risk to the general public. Control rods are one of the best designed safety features within a nuclear reactor, they are designed to avoid any rapid increase in reactor core temperatures. When fuel temperatures rise to a temperature at which coolant will be contaminated and need to be ejected, the control rod safety mechanism kicks in. They are designed to slow the neutron flux with in the reactor, much like the moderator does, and hence slow down the rate of energy generation so that coolant can carry heat away without the risk of contamination. Systems are in place so that this precaution is activated immediately when any reactor threat is detected. This safety measure reduces the risk of any radioactive material being ejected via cooling systems. In fact studies suggest that exposure to radioactive sources due to nuclear power stations and nuclear fuel plants are less than 0.1% of human annual exposure to radiation, this can be seen from figure 1. So although there is a high chance of radioactive contamination the safety mechanism that are in place prevent this risks from occurring and keeping exposure down to a minimum. Figure 2- Figures showing annual sources of radiation exposure [4] With this in mind although there are danger risks when considering nuclear fuel as a replacement for fossil fuels, the number of design features installed to prevent this is more than adequate to ensure the safety of the technology. Proliferation concerns One concern with Nuclear power is not the safety risks of the power station or the waste they produce but instead that enrichment facilities can produce Uranium that is enriched for use in nuclear weapons. This is much a concern in the developing world where governments are not as stable and it would not take long for a fuel enrichment facility to start producing weapons grade uranium. Renewable energy sources So far we have looked at some of the pros and cons of nuclear power and it seems like a viable alternative to fossil fuels, but technological advances have allowed renewable energy sources to become a viable option for industrial production of energy. Renewable sources of energy cant produce energy on the scales that nuclear power plants can but they do not suffer from the contamination complications that nuclear power does. Solar power Solar power exploits natures biggest source of energy the sun, which outputs a massive 3.8410^26W [5] of which we receive 1.7410^17 W or 1.366kW/m^2 [6]. This is a huge amount of energy to exploit and an obvious choice for renewable energy because the sun is expected to remain in the sky for the next four and a half billion years. This seemingly perfect candidate for energy production seems relatively unused as solar power accounts for just 0.9% [7] of worlds energy production. One of the main issues with solar technology is the photovoltaic cell, this being the standard solar panel technology, it has a relatively low efficiency and as a result the amount of energy outputted does not represent the full potential from the energy put in, also with the sun being an intermittent energy source, the only way photovoltaic cells can produce energy at nights is with the use of large banks of batteries, which are expensive and an environmental hazard. There are seemingly new technologies creeping into the solar market, much simpler than the photovoltaic cell and much more efficient. One such technology is the solar tower. The solar tower uses a large field of heliostats which are mirrors that track the sun to focus the suns light on a single point which is a central tower. The central tower uses the heat supplied to drive a steam turbine capable of generating between 10 and 100 MW (dependant on the number of mirrors), for example the PS10 solar power plant in Spain uses 624 heliostats to generate 11MW and is still being constructed[8]. This may seem like a small amount of energy but a larger area solar power tower could provide much more energy, by increasing the area of the plant, by increasing the number of heliostats. One such project is currently under way in the Mojave desert which covers 4000 acres and aims to generate enough electricity to power the city of San Francisco [9]. Unlike Photovoltaic cells solar power towers hav e the capability of producing energy at night. When the suns energy is focused on the central tower some of the heat which is used to drive the turbines is also used to heat salts to molten temperatures in excess of 200 C, molten salts can keep their temperature very well if insulated properly, and when required can be pumped through the turbine to generate steam to generate electricity [10]. Given enough time Solar power could become a replacement for fossil fuel energy production, but in the meantime it suffers from high initial costs, a large carbon footprint and a lack of backing. Currently Spain appears to be the pioneers of this technology and have already constructed numerous solar power towers including PS10 as discussed earlier. Wind power One by-product of the suns energy that has yet to be mentioned is that it supplies energy into the atmosphere causing temperature and pressure differences, this produces a bulk movement of air molecules resulting in the wind. The wind is a much more exploited energy source compared to solar power, with wind power producing 2.5% of the worlds electricity[11]. Wind power generates electricity in a very similar manner to a conventional power generator, but instead of using water as a fluid to turn a turbine, the wind is the fluid that turns the turbine. Although there is a significant amount of power available in the wind not all of it can be extracted and a theoretical limit has been calculated for the amount of energy that can be [12]. This limit means that 59.3% of energy in the wind can be used for energy generation. In reality much less than this is extracted because wind is not a uniform medium and as such suffers from intermittency issues similar to solar power, in that wind is not a constantly accessible resource. Hydroelectric Power One already established form of renewable energy is Hydroelectricity, the generation of energy using the conversion of gravitational potential energy of falling water through a turbine. Its currently the 4th largest form of power generation behind coal, gas and nuclear power producing 20% of the worlds current electricity demands [13]. Interestingly though Hydroelectricity has been exploited in the 1st world, with almost all possible sites being developed for hydroelectricity, its only in the developing world where hydroelectricity could be utilized to improve renewable energy generation, this would explain why it is the 4th largest energy provider [13]. Unlike wind power and solar power, hydroelectric power does not suffer from intermittency issues. The idea behind a hydroelectric dam is that it uses the water at a higher gravitational potential to fall through a turbine generating electricity. When there is a smaller demand for electricity the flow rate can be reduced and the reservoir can be used to store excess water, this provides the dam with water on demand, which is a unique feature of hydroelectric power. Three gorges dam in china is a fantastic example of a 21st century hydroelectric plant, for reference it is capable of producing 22500MW [14] this is greater than 100 times the amount of energy produced by a solar power tower, and 5 times more energy than the largest nuclear power stations, so obviously hydroelectric dams are useful and utilizable replacement for fossil fuels. Hydroelectricity does have its environmental faults, and is probably the most hazardous of the renewable power sources. In order to construct a hydroelectric plan a large enough volume of water is required with a big enough drop for potential energy conversion to warrant building a hydroelectric plant. To do this a river must be dammed which upriver will flood a large area of land, this causes huge amounts of destruction to natural habitats, downriver there is a chance that drinking water is contaminated which has obvious human impacts. Conclusion on energy types We have discussed the different aspects of nuclear power and many different types of renewable energy sources. It is my opinion that despite certain renewable already being established they have still not reached their potential to replace fossil fuels, especially with certain intermittent issues and as a result are not ready to replace fossil fuels. On the other hand, while renewable sources develop into a more viable energy source nuclear power is ready to replace fossil fuels in the interim. If we compare energy production it would appear as if hydroelectric dams are the best option, but as discussed all sites in the developed world have been exploited and for comparison nuclear power stations are still being built as many possible sites still exist. Despite its safety issues and the non-renewable nature of nuclear fuel, nuclear power is capable of producing a steady supply of power that will meet demands upon request. In reality there is no one replacement for fossil fuels, as a society we have created a huge dependence on them and it is going to require a mixture of different power sources in order to develop a secure energy future and as a result our future probably lies with renewable energies and nuclear energies working in conjunction with each other. References 1. Deutch J.M et al, Future of Nuclear Power, An interdisciplinary MIT study, 2009, page 1. 2. El-Asjry M. et al, Renewable energy policy network for the 21st century, REN21, 2010, page 9. 3. Falk J. Bodman R.,Uranium Enrichment, Energy Science, November 2006, page 2. 3b. Power and technology, Full statistics of turbine energy generation, http://www.power-technology.com/projects/kashiwazaki/, accessed 16 April 2011. 4. Nuclear safety, The institution of engineering and technology, 2006, page 3. 5. Zeilik M. et al, Introductory Astronomy and Astrophysics, Saunders college publications, 1992, page G-11. 6. Wilson R. C., and Mordvinov A. V., Secular total solar irradiance trend during cycles 21-23, Geophys. Res. Lett, 2003, page 1199. 7. Wirman C., Electrical power annual: generation, US energy information administration, 2009, page 3. 8. Garcia-Sobrinos G., Tower of Power, Civil engineering, 2009, page 42-49. 9. Zook D., County supervisor concerned by Brightsource Mega Solar Project Impacts calls for a full review, Best Syndication News, 2011. 10. Barth D., Development of a High Temperature, Long-Shafted, Molten-Salt Pump for Power Tower Applications, Journal of Solar Energy Engineering, 2002 11. Ragheb M., Wind Power Systems:Harvesting the Wind, College of Engineering University of Illinois, 2011. 12. Gijs A.M. van Kuik, The Lanchester-Betz-Joukowsky Limit, Wind Energy Journals, 2007, 10:289-291 13. Hydropower and the Worlds Energy Future, International energy agency publication, 2000, update 2009. 14. Fabian A., Taming the Yangtze, IET publications, 2009.

Horrors of Animal Research, Testing, and Experimentation Essay

The Horrors of Animal Testing    The torture and murder of millions of animals annually has been occurring for centuries now. Every year we ignore it, and every year the numbers grow. The act of vivisection or the practice of experimenting on animals began because of religious prohibitions against dissection of human corpses. After religious leaders lifted these prohibitions, it was too late. Vivisection had become a major part of medical and educational research. As well as major part of product testing in many companies. Experimenting and testing on animals is morally wrong because, it is inhumane and torturous. We, as a country, should not condone cruelty to animals. Why is it a person can be charged with a crime for not feeding their pet, but these companies torture and murder millions of animals and nothing happens to them? Because we as people will do nothing to stop these hanious crimes. The reason we cannot prevent these terrible acts is because we do not know they are occurring. Millions of people do not realize simple products and drugs we use every day are tested on animals. Although animal testing of certain pharmaceuticals and chemicals is still mandated by law, but there is no law that requires testing of personal care and household products. These laws that require animal testing of certain drugs and chemicals were developed very casually back in the 1920Æs. Today, we know that non-animal test methods exist and that these tests are more accurate in predicting toxicity than are crude, cruel tests on animals. Many companies resist progress because the crude nature of animal tests allow them to market many products that might be determined too toxic if cell culture tests were used. These are the companies who... ...any new alternatives to dissection. These include many new computer programs and very thorough coloring books. These teach without the constant supply of animals. Animal testing is a horrific action that takes place everyday. In today's society we should not condone this behavior. It wastes a lot of money and time. Everyone should be seeking a way to stop these terrible acts. Works Cited 1)Sadistic Scandal. n. pag. Online. Internet. 28 April. 1998. Available: peta- online.org 2)Testing Without Torture. n. pag. Online. Internet. 28 April. 1998. Available: peta-online.org 3)Toxic and Tragic. n. pag. Online. Internet. 28 April. 1998. Available: peta-online.org 4)Fisher, Lawrence M., 3 Companies Speed Artificial Skin, The New York Times, Sept 12, 1990. 5)Branna, Tom, Animal Testing Alternatives: Moving Closer to Validation?, February 1995

Charlemagne, or Charles the Great, King of the Franks :: Medieval Europe European History

Charlemagne, or Charles the Great, King of the Franks Charlemagne, or Charles the Great, King of the Franks (742-814), was a strong leader who unified Western Europe through military power and the blessing of the Church. His belief in the need for education among the Frankish people was to bring about religious, political, and educational reforms that would change the history of Europe. Charlemagne was born in 742 at Aachen, the son of Pepin(or Pippin) the Short and grandson of Charles Martel. His grandfather, Charles, had begun the process of unifying western Europe, in the belief that all people should be Christian. Charlemagne's father, Pepin, continued this process throughout his rule and passed his beliefs on to Charlemagne. All three, in addition to the political unification, believed that the church should be reformed and reorganized under the Pope, which helped their rise to power as the Carolingian Dynasty. (Holmes 74) Upon Pepin's death in 768, Charlemagne and his brother, Carloman, each inherited half of the Frankish kingdom. Pepin, in the Merovingian tradition of the time, split his kingdom between his two sons. Three years later Carloman died and Charlemagne took control of the entire kingdom. He inherited great wealth and a powerful army, built by his father and grandfather. Charlemagne used the army and his own skillful planning to more than double the size of the Frankish Kingdom. (Halsall 15) The world of Charlemagne was a heathen one, with many warring tribes or kingdoms. Many of these tribes were conquered by Charlemagne, among them the Aquitanians, the Lombards, the Saxons, the Bretons, the Bavarians, the Huns, and the Danes. The longest of these battles was against the Saxons, lasting thirty-three years. Charlemagne actually defeated them many times, but due to their faithlessness and their propensity to return to their pagan lifestyle, the Saxons lost many lives in the prolonged battles with the Franks. With each conquest the Frankish kingdom grew, and with growth came additional power and responsibility for Charlemagne. In each area of Europe that was taken over by Charlemagne, he removed the leaders if they would not convert to Christianity and appointed new ones, usually someone with high position in the Church. Those people who refused to convert or be baptized in the church were put to death. (Holmes 75) The Church played a vital role in the kingdom of Charlemagne. It gave a sense of stability to Charlemagne's rule, and he in turn provided stability in the Church. The people conquered by Charlemagne, after being converted to Christianity, were taught through the Bible a unified code of right and wrong. It was necessary for the Church to play a role in this education of the people,