Solar Technology in Gemasolar Technology

Solar Technology in Gemasolar Technology The world today requires energy for quite a number of things. Without energy the world will come to a standstill. For many years, the demand for power has been fulfilled through the use of fossil fuels such as natural gas, coal and products derived from oil.Advertising We will write a custom report sample on Solar Technology in Gemasolar Technology specifically for you for only $16.05 $11/page Learn More Kulichenko and Jens claim that there was need to find new sources of energy after a while because of; high cost of traditional sources, difficulty of guaranteeing supply of traditional sources, global economic growth that has brought about a growing demand for more energy and increased global warming (52). Solar power is inexhaustible, plentiful and clean energy. Solar technology is used to convert solar radiation to other forms of useful power. Solar thermal power plants are mainly located in extremely dry and uncultivated areas not used for agricultural ac tivities. Such areas provide the ideal or appropriate conditions for solar energy radiation absorption. This report is about the Gemasolar energy plant located in Fuentes de Andalucà ­a in Seville province of Spain. Gemasolar energy plant is a concentrated solar power plant which uses a central receiver technology with molten heat storage system. The plant started working mid 2011.Technical feasibility of Central receiver technology was first proved during the 1980s by operation of six research power plants ranging from one to five MWe capacities and by one to ten MWe. A demonstration plant with a steam receiver was connected to the southern California grid. The Spain Central tower receiver power plant was the pioneer commercial scale power plant globally that used this kind of technology. (Jayasimha 10) Without a doubt, solar power towers are to be the backbone of the entire power generation scheme.Advertising Looking for report on environmental studies? Let's see if we ca n help you! Get your first paper with 15% OFF Learn More The plant has the ability to take in sun rays and provide energy at night and also during cloudy days (Rirdan 102). Central receiver towers are large scale power plants.It is made up of two axis tracking mirrors or heliostats which reflect solar radiation at the very top of the tower where the receiver is placed. The main goal of the Gemasolar project is to demonstrate the technical and economical viability of molten salt solar thermal power technologies to deliver clean cost competitive bulk electricity (Negewo 93). The plant is owned by Torresol energy investments. Originally it was known as Solar Tres before the name was changed to Gemasolar. Torresol energy investment is owned 40% by Masdar, a company based in Abu Dhabi. 60% is owned by Sener from Spain (Hanna 45). The Gemasolar power plant is made up of 185 hectares of solar field. The high tower receiver is 140 meters high. It also has 2,650 heliostats ea ch having 120 square meters distributed in concentric rings around the tower (Negewo 92). Sodium and potassium nitrates make up the molten salt which is usually stored in tanks made of steel. The biggest tank at the plant has a diameter of 23 meters and a height of 14 meters. The molten salt is used as heat transfer fluid and energy storage medium. It is easy to manage the solar power due to the storage capacity of the steel tanks. It is supplied on demand. Connected to the tower at ground level are the hot and cold storage tanks. The tanks can store salts which provide energy for up to 15 hours without the sun. Molten salts in the cold tanks are stored at 290 °c and 565 °c in the hot storage tank (â€Å"Cleantechchnica†:Spain Gemasolar). The implementation of the molten salt heat storage system allows creation and appearing of electricity when there is any solar radiation.Advertising We will write a custom report sample on Solar Technology in Gemasolar Technology specifically for you for only $16.05 $11/page Learn More How It Works Solar radiation first falls on mirrors known as heliostats. It is then reflected on to the receiver situated at the top of a supporting tower. Solar radiation is concentrated by the heliostats at 1000:1 ratio. This is controlled by a network of communication with 26 fiber optic rings present in it. The orientation of the heliostats is automatically turned towards the sun by geared motors so that they reflect beam radiation on the receiver all day. A fluid flowing through the receiver absorbs the concentrated radiation and transports the heat to the ground level where it is used to operate a thermodynamic cycle. The receiver is capable of absorbing 95% of the radiation transmitted to the molten salts in the central receiver (You tube: The World’s first Base load). Cold salt is pumped up to the top of the tower at the central receiver where it is heated up. The liquid salt is brought back t o the hot storage tanks being kept there at the temperature of 565 °c. After leaving the storage tank, the heated salt is moved to the heat exchanger chamber via steam pipes and steam is formed as a result of condensation. By means of this steam the turbines are turned; they generate electricity. According to Rirdan, any extra heat generated is kept in the molten storage tank and is used to produce electricity when the sun’s heat and radiation is absent. Power generated is transferred to a substation located in Villanueva Del Rey, Andalucà ­a, and further transmitted to the National grid system (102). Cost of the project Estimated cost of project was â‚ ¬171 million. It was financed by several financial institutions including European Investment Bank, Banco popular and Banesto ICO. Engineering, procurement and construction were done by Sense Company. This was inclusive of the development of a molten salt receiver and the manufacturing of heliostats.Advertising Looking for report on environmental studies? Let's see if we can help you! Get your first paper with 15% OFF Learn More A company called SGS was tasked with provision of assistance in the civil works for example construction progress audit, power limit substantiation, commissioning and initial operation of the power plant. Outukumpu was charged with the task of constructing hot and cold storage tanks. The Nord block gear motors were manufactured by Nord drive systems. Working together, Schneider electronics and Hirscham electronics were the companies that built the communication network. It took 29 months to construct the power plant. Energy output Electric power is up to 19.9 MW. Net electric production expected per year is 110Ghw.The electricity generated of approximately 110 MWe per year is the highest electrical generation in the world for solar plants. Advantages of the Gemasolar Technology These are the reasons why the Central receiver tower technology is preferred to other renewable energy production methods. It has a prolonged operating time without solar radiation. This means that it can wor k through the night or on cloudy days using energy from the stored heated salt. Energy output from this power plant is higher than that of other technologies in a facility with the same power. It has guaranteed electrical production for 6500 hours per year which is approximately two to three times higher than that of renewable energies. It is more scalable to any application both large and small thus it has significance to utilities. It is more consistent energy supply with centralized and dispatch able generation model (Negewo 101). Its potential in MENA significantly exceeds any foreseeable regional demand even when quite onerous site conditions are required. It has significant potential for future development thereby reducing cost. It works well with current large scale desalination technologies (Negewo 101).Other benefits of the central receiver power plant include: It provides clean and safe power to approximately 25,000 homes. There is less carbon dioxide emission by more than 30,000 tonnes a year (Enviromission Solar Tower 13). In addition, the turbines do not have to be shut down quite often and hence the plant has a longer lifespan. The plants electrical generation can also be controlled to suit the demand for electricity. Breaks or leakages are greatly reduced since there are no tubes or heat exchange fluids that spread out across the solar field and hence leads to low operational and maintenance costs (Rapier). Conclusion Solar is improving its cost and performance by 20 % each year and is expected to continue to do so for the foreseeable future (Seba 17).Concentrating solar thermal electricity is rapidly expanding in Spain and globally. In the USA, a first generation solar power thermal station of 354 MWe has been operating for more than 20 years. As of mid 2011 about, 1100MWe of CST was installed globally. In principle, given sufficient land, 24 hours storage is feasible and solar thermal power can be operated either as base load, intermediate loa d or peak load depending on amount of storage installed and electricity prices. Enviromission Solar Tower. Web. Hanna, Nick. The Green Investing Handbook: .A Guide to Profiting from the Sustainability Revolution. London, UK. Harriman house limited, 2010. Print. Jayasimha, Balakrishna. 2006. Application of Scheffler Reflectors for process industry: International Solar Cooker Conference, Granada, Spain. Web. Kulichenko, Natalia, and Wirth Jens. Concentrating Solar Power in Developing Countries. Washington, DC., World Bank, 2012. Print. Negewo, Bekele. Renewable Energy Desalination: An Emerging Solution to Close the Water Gap. New York. World Bank publications, 2012. Print. Rapier, Robert. Power Plays: Energy Options in the Age of Peak Oil. New York. Apress, 2012. Print. Rirdan, Daniel. The Blue Print: Averting Global Collapse.Louisville. Corinno Press, 2012. Print. Seba, Tony. Solar Trillions: 7 Market and Investment Opportunities in the Emerging Clean-Energy Economies. Madrid. IMF P ublications, 2010. Print. Spain’s Gemasolar 24/7 Power Plant (VIDEO) 2011. Web. The Worlds First Baseload (24/7) Solar Power Plant. Web.

Euphemisms for Death

Euphemisms for Death Euphemism is especially frequent, says linguist John Algeo, when we must come face to face with the less happy facts of our existence. Here we consider some of the verbal tranquilizers employed to avoid dealing head-on with death. Despite what you may have heard, people rarely die in hospitals. Unfortunately, some patients do expire there. And according to hospital records, others experience therapeutic misadventures or negative patient-care outcomes. However, such mishaps cant be nearly as disappointing as the patient who has failed to fulfill his wellness potential. Most of us, I imagine, would rather die than let down the side in this fashion. Well, perhaps not die exactly. We might be willing to pass on, like dinner guests who take a pass on dessert. Or depart, as we should after a night out. (Theyre no longer with us, our hosts will say.) Unless, of course, weve had a bit too much to drink, and then we might just end up lost or asleep. But perish the thought. In the article Communication About Death and Dying, Albert Lee Strickland and Lynne Ann DeSpelder describe how one hospital worker tiptoed around the forbidden word. One day, as a medical team was examining a patient, an intern came to the door with information about another patients death. Knowing that the word death was taboo and finding no ready substitute, the intern stood in the doorway and announced, Guess whos not going to shop at Wal-Mart anymore. Soon, this phrase became the standard way for staff members to convey the news that a patient had died.Dying, Death, and Bereavement, ed. by Inge Corless et al. Springer, 2003 Because strong taboos surround the subject of death in our culture, countless synonyms for dying have evolved over the years. Some of those synonyms, such as the gentler terms suggested above, are regarded as euphemisms. They serve as verbal tranquilizers to help us avoid dealing head on with harsh realities. Our reasons for using euphemisms are varied. We may be motivated by kindnessor at least politeness. For example, when speaking of the deceased at a funeral service, a minister is far more likely to say called home than bit the dust. And to most of us, resting in peace sounds more comforting than taking a dirt nap. (Note that the opposite of a euphemism is a dysphemism- a harsher or more offensive way of saying something.) But euphemisms arent always employed with such solicitude. A substantive negative outcome reported at a hospital may reflect a bureaucratic effort to disguise an interns blunder. Likewise, in wartime a government spokesperson may refer abstractly to collateral damage rather than announce more candidly that civilians have been killed. Euphemisms, Death and Mortality [E]uphemism cannot cancel the reality of death and mortality, says Dorothea von MÃ ¼cke in an essay on German writer Gotthold Lessing. Nonetheless, it can prevent the sudden confrontation, the accidental, unprotected encounter with death as the real, as decomposition and undifferentiation (Body and Text in the Eighteenth Century, 1994). Euphemisms serve as reminders that communication is (among other things) an ethical activity. Strickland and DeSpelder elaborate on this point: Listening carefully to how language is used provides information about the speakers attitudes, beliefs, and emotional state. Becoming aware of the metaphors, euphemisms, and other linguistic devices that people use when talking about dying and death allows for greater appreciation of the wide range of attitudes toward death and promotes flexibility in communication. Theres no doubt that euphemisms contribute to the richness of language. Used thoughtfully, they can help us avoid hurting peoples feelings. But when used cynically, euphemisms can create a haze of deceptions, a layer of lies. And this is likely to remain true long after weve bought the farm, cashed in our chips, given up the ghost, and, as now, reached the end of the line.

To what extent does Twitter's mission statement reflect its usage Literature review

To what extent does Twitter's mission statement reflect its usage - Literature review Example The organisation claims it to be ‘the fastest, simplest way to stay close to everything you care’ (Twitter, 2012). Twitter is based upon the four fundamentals, namely, Microblogging, Social Networking, Social Media and Computer-Mediated Communication. In recent times, the importance of social networking and media has been noticed largely among the youth generation. Not only have the young people, but also companies in modern days, use social networks to transfer information among the people who are by large the users of these social media. The organisations have been using a tool named microblogging which can be stated as the process of posting smaller digital contents such as, pictures, short videos, links and other media contents in the internet. Although, there are many social networking sites, Facebook has been another social media which have recently gained huge popularity, in comparison to Twitter. The difference between Twitter and Facebook is the class of users, i.e. while Twitter is generally used by most of the celebrities and dignitaries; Facebook is used by all the classes of the society. Micro-blogging According to Java & et. al. (n.d.), Twitter is currently the most accepted microblogging stage which enables users to update their current statuses through short message services (SMSs), digital photos or short videos. In other words, an online community is formed by inviting friends and colleagues who share information of their recent happenings through short texts or audio-visual clips. Furthermore, it can be stated that microblogging in recent times has become an extremely famous media for both personal and professional recreation. Friends use it to keep in touch, professionals use it to co-ordinate business meetings and share important resources; similarly, celebrities and political dignitaries use it for gaining publicity by posting comments regarding their tour schedules, concert presences and film releases (Java & et. al., n.d.). According to a publication of the 17th European Conference on Information Systems (2009), it has been observed that the term microblogging has developed additional terms such as microsharing and activity streaming which are being used commonly by recent users. It has also been noted that Twitter is being used at a higher degree for micro-blogging in comparison to other accessible social networking sites; although, many people have complained about its reliability and functionality (17th European Conference on Information Systems, 2009). As stated by Ehrlich & Shami (2010), posts or ‘tweets’ can be viewed by anyone who is following the person or even attempts to view the public profiles. Furthermore, the authors state that the concept of ‘following’ is very different from ‘friending’ as in social networks consent from both the parties are required to share and view other people’s information. Whereas in the case of Twitter, consent is not necessary and a person can automatically follow other person according to their likes and tastes. Thus, it can be stated that the popularity of Twitter has grown rapidly due to its unique qualities (Ehrlich & Shami, 2010). In this respect, Ebner & Schiefner (2008) observed that the success of microblogging or ‘weblogs’, shortly called as blogs are due to the three factors;

Internationl Economic Law Essay Example | Topics and Well Written Essays - 2250 words

Internationl Economic Law - Essay Example These trade advantages encompass benefits like larger import quotas or lower tariffs and import duties. A country designated with the MFN status must be treated on an equal platform as any other country that has been awarded the MFN status by the nation granting this special status. The MFN treatment principle is important in the context of the WTO whose members have pledged to award MFN statuses to each other. There are also certain exceptions like designating free trade sectors on a regional basis and providing additional benefits to the developing nations. Under the MFN system stipulated by the WTO, a member nation that grants the most-favoured status to a non-member state for a particular product is obliged to provide the same benefits to other members of the WTO2. Thus, the WTO ensures that trade benefits are provided to all members as well as non-members on an equitable basis. The notion of a Most-Favoured Nation has existed since medieval times where smaller versions of such a greements have existed since the 15th Century. However, the expansion of MFN status in international trade began to develop during the 18th century3. Before the General Agreement on Tariffs and Trade (GATT), the MFN treatment could be found only among Bilateral Investment Treaties (BITs) which indeed aided in liberalizing international trade. MFNs also find mention in the ‘Fourteen points’ laid out by United States (US) President Woodrow Wilson in 1918 which called for the liberalization and equality of trade conditions among nations4. Features of the MFN principle The MFN treatment principle has numerous economic effects that are elaborated below. Advantages to International Trade The most important benefit of the MFN principle is that it allows nations to import goods from the most cost-effective and efficient producer without disrupting the notion of comparative advantage5. For instance, a country can import products from the best supplier from different countries ba sed on cost, quality and efficiency thereby improving its economic efficiency. However this efficiency is distorted if the importing nation imposes a higher tariff on imports from the efficient supplier, prompting the importer to prefer products of the next best supplier (from a different country) at lower tariffs. This results in a trade imbalance which reduces the economic benefit to the importing nation besides disrupting global economic efficiency6. The provision of the MFN status in this context to all the countries implies that the importing country will levy equal tariffs on all exporting nations resulting in the procurement of goods from the most efficient supplier. Thus, the primary objective of the MFN treatment principle is to improve the efficiency of international trade. Free Trade System As mentioned above, the equal treatment of nations based on the MFN treatment principle accords the most liberal business environment that allows WTO member states to cut costs in nego tiation and monitoring trade agreements. In simpler words, the MFN treatment has resulted in the reduction of costs associated with the maintenance and functioning of the free trade system7. Equal treatment for imports from all member countries also means that costs associated with ascertaining the originating port or country are also reduced thereby contributing

Robert Frost A Road Not Taken Essay Example for Free

Robert Frost A Road Not Taken Essay Robert Frost ever timeless poem â€Å"The Road Not Taken† has spanned all time because of its ability to appeal to the basic and inevitable necessities of adulthood –making tough decisions and living with the consequences of said choices in the quest for happiness. Robert Frost used the symbol of two roads to show a young man’s need to make a very difficult decision. In breaking the poem down in terms of reading and re-reading the poem in its entirety, one can’t help but be immediately placed in the shoes of the speaker in terms of one’s own life choices. The poem begins with th speaker standing in the middle of two roads. The imagery used in the poem â€Å"diverged in a yellow wood† (Frost, 1916), leads the reader to believe the poem takes place in the fall probably when the leaves are turning yellow. He then proceeds to say that he wishes that he could travel both roads, but of course that is physically impossible. He stands for a long time trying to decide which road to take. He looks down the path in attempt to see where it leads. This is so symbolic of one’s own â€Å"paths†. No one of course can see the outcome of the impending choices that we make or are about to make. In the next stanza, he chooses a path that he wishes to take. â€Å"Then I took the other, as just as fair, Because it was grassy and wanted wear,† (Frost, 1916). Breaking down the story, both the author and thereby the speaker would have the reader believe that the two roads, in terms of their appearance, are both equally pleasing to the eye. But in the line, â€Å"as just as fair† (Frost, 1916), he wants the reader to believe that the two roads and thereby the two choices are different, but could be equally just as good. The speaker is still unsure as to which path he really wants to take. He describes the path as being â€Å"perhaps† better. Nevertheless, it looks as though it hasn’t been used as often as the other. Frost used the alliteration, â€Å"wanted wear†. This actually meant that it lacked used. The speaker becomes incredibly indecisive. Just when the reader thinks that the speaker has made a decision, he says again how the roads are almost the same. The phrase â€Å"the passing there† (Frost, 1916) meaning traffic, could mean people who are walking like him. We then get a glimpse into the time of day in which this decision making is taking place in the line â€Å"And both that morning equally lay, In leaves no step had trodden black† (Frost ,1916), and also that in the area in which he stood, the leaves that have fallen, have not been stepped on and thereby had not changed color on the ground. The speaker seems to poke fun at his need to make this decision with the line â€Å"Oh! I kept the first for another day† (Frost ,1916) He says that he will go back to the road that he is seemingly choosing not to take, another day. Here is another example of how this poem has transcended time. One always thinks or hopes that the choices that we make can somehow be undone. The notion that once we get to a certain point, if we for some reason do not like the way that things are going, the road that we are taking if you will, that we can always turn around and go back if our initial decision has failed. Then he seems to say just that in the line† Yet knowing how way leads on to way, I doubted if I should ever come back†(Frost, 1916). He realizes that the idea of coming back to this initial spot, is ridiculous. One never knows how one decision can lead to another and another and yet another leading us so far away from the first decision, that we would not be able to s ee from whence we began and essentially not being able to go back. The speaker moves forward in time; many years from the primary decision. This allows the reader to infer that the choice that the speaker is making or has already made, is one of great import, one that could possibly impact him so much that he will be talking about it for years to come. When the speaker says â€Å" I shall be telling this with a sigh, Eleanor Sickels is quoted to say that â€Å"the poem is about the human tendency to wobble illogically in decision and later to assume that the decision was, after all, logical and enormously important, but forever to tell of it with a sigh as depriving the speaker of who-knows-what interesting experience. (www.wikipedia.org. October 2011) As we reach the conclusion of the poem, the speaker repeats the first line of the poem, and now we know which path he chose â€Å"and I—Took the one less traveled by, And that has made all the difference.† (Frost, 1916). The speaker has made the decision to take the road that few others have taken, one that could either positively or negatively impact his life forever. The conclusion of the poem does not however tell us whether or not the speaker was a failure or a success. It could possibly depend on whether the reader is a pessimist or an optimist. The theme of this story is choices. Frost uses symbolism and imagery to paint a perfect picture of how one generally makes decisions. In the beginning of the poem we are placed in a glowing yellow wooded area in the early morning along with a young man, forced to make a decision that will change him forever. Wow! The power of the pen! The power to automatically be beamed into a situation that is so reminiscent of our own struggle, is one that has been mastered time and time again, yet this poem probably has more meaning today than it did in 1916 when it was written. So many in the U.S., due to lack of money, experience, or drive, have been forced to make decisions that have left many only one paycheck away from homelessness. Did Mr Frost know at the time how much of an impact this poem would have on the world? Did he know that after almost one-hundred (100) years that he would be written about in terms of great literature? One can only hope that, with all of his many works, Mr. Frost knew that his poems and short stories would solidify his place in English literature forever. References: â€Å"The Road Not Taken† Robert Frost 1916 Bridgepoint Education 2010 Journey Into Literature R. Wayne Clugston www.wikipedia.org

Comparing Foreshadowing in Train from Rhodesia and Dead Mens Path Essa

Foreshadowing and Alliteration in Train from Rhodesia and Dead Men's Path Authors often use literary devices to appeal to their audience without their awareness. By doing so, certain parts of a story or book will seem more important, in a very private way. They won't scream for attention, but they will stick, for they are catchy. Sometimes, authors are not aware that they are using a device to persuade their audience, it occurs naturally. Common literary devices and elements are metaphors, similes, alliteration, perhaps even couplet rhyming. Though foreshadowing is not necessary a literary device, it is often an element that many authors use in their work as well. Foreshadowing through adjectives and alliteration are two devices used in both "The Train from Rhodesia" by Nadine Gordimer and "Dead Men's Path" by Chinua Achebe. "The Train from Rhodesia" by Nadine Gordimer shows foreshadowing elements through it's adjectives and other important words. It alludes to the end mood of the story through adjectives used throughout. At the end of "The Train from Rhodesia", there is an overwhelming feeling of emptiness, perhaps even a persistent sadness. Throughout the story, many of the adjectives point to that. The words "pale" and "dead" in the sentence, "...on either side of a uniform railway vase with it's pale dead flower." (p. 909) and even the word "uniform" points to the emptiness which will prevail toward the end of the story. "Empty" may seem like a word to describe "the empty sand." (p. 910) but it also points to the emotion of the girl at the end. Words that show uncertainty, basted in melancholy occur all over the book, like "waiting", "wandered", "faint", "da... ...more vibrant than a fulfilled smile, and the way a school should be run contains power within the statement. There is no doubt that Achebe did not use alliteration gratuitously, but to show the reader which elements of his story he feels are the most powerful-to serve a purpose. "The Train from Rhodesia" by Nadine Gordimer and "Dead Men's Path" by Chinua Achebe both employed foreshadowing through adjectives and alliteration in their stories. The use of these devices was not to be charming, or cute, but to instill purpose and meaning to their stories. A story without purpose is simply meaningless drivel, and a story with a purpose that cannot be remembered because of a lack of devices is also equally as meaningless. The devices used in both stories illustrate the author's point as concisely as possible. Both stories have maintained their purpose.

American Slavery

Political Points of View: American Slavery In the autobiography, The Narrative of the Life of Frederick Douglass, writes of the Incident when he defends himself against the cruel Mr. Covey. Harriet A. Jacobs also writes in her autobiography, Incidents in the Life of a Slave Girl, of the time she decides to escape from her owners. Spirituals were extremely emotional songs that were often sung by American slaves. Harriet Tubman, a famous â€Å"conductor† or guide that helped free slaves, was interviewed and her stories were published of what she s an abolitionist went through.One similarity they all have is after being pushed too far, they resist against their suppressors. Douglas's way of resisting injustice was defending himself against Mr. Covey. Mr. Covey was a cruel man that Douglass was loan out too. â€Å"l resolved to fight. † what was Douglass determined as he equally hurt Mr. Covey who had beat him previously day after day. I believe Frederick Douglass did the r ight thing even though extremely risky. Harriet A. Jacobs also resisted injustice by escaping her owner, Mr.Flint, and oing to hide at relatives or friends houses, but close enough to keep an eye on her children. â€Å"l groped my way tothe road.. † a quote Jacobs wrote in her autobiography of when she escaped. Even though though risky, Jacobs escaped to try and keep her children safe. knowing that If she took them with her they would give them away or they wouldn't be touched by Mr. Flint since he believed she would return for them. Both went to hardships but found ways and the strength to rise up. Harriet Tubman created the underground railroad. which allowed many salves to scape to the free states.Tubman ,herself a former slave, was the most wanted fugitive of the era and although knowing the dangers still continued leading the underground railroad. Tubman tried to get her brothers to Join her to freedom but they refused. However, she didnt let that stop her. â€Å"She wa lked off alone, following the guidance of the brooks which she observed to run North. † Many American slaves were also known to sing spirituals. Spirituals tended to have codes, or expressed on how Americans slaves really felt about slavery. Spirituals were â€Å"moving and intensely emotional songs. In a sense I feel spirituals created a sad, depressing atmosphere, since many songs were sung that way. However, many were Spirituals were extremely helpful to Tubman and others to become free. Many American slaves were too afraid to rise up, but a few did.

Sahara Desert

General facts: Largest Desert in the world 10 percent of the African continent, 5000 years ago had a significantly larger mammal population, due to it getting dryer and over hunting in the last 100 years, the mammals are near extinction in the sahara. Intro: Definition of desert: â€Å"a region so arid because of little rainfall that it supports only sparse and widely spaced vegetation or no vegetation at all† Deserts cover about one fifth of our planet, and are caused by extremely low rainfall over an area. Arid deserts generally occur at low latitudes, and can be found in North-America, South-America, Africa, and Southern Asia. In deserts such as the Atacama, there has never been any rainfall recorded since record keeping has come into existence. While â€Å"coastal deserts† are mildy warm and get some rainfall and â€Å"cold† deserts are cold. Climate: Temp: The average temperature for this desert is 86 degrees Fahrenheit with the hottest ever recorded being 122 degrees. With freezing temperatures in the winter the climate of the Sahara is one the of the strangest on the planet. Temperature swings of 37.5 to 99.5 have been recorded. Rainfall: the average rainfall for the Sahara is just 2.5 cm and in the eastern parts it only gets .5 cm of rain a year. Seasonal Variations: There are not much variations in seasons in this desert. It is mostly hot with very little rain. The only exception is winter. During winter the temperature can drop below freezing and it is more likely to rain during these times. Human Interaction:  The current state of the biome is as usual with one exception: the water supply. The only human presence is around areas of permanent water supplies, such as oasis’ and water that is underground but close to the surface. Humans that live in these areas use the little water that is available for them selves and take that small amount away from the creatures that live there.

Essay Sample About Matthias Schleiden Write More About a Scientist

Essay Sample About Matthias Schleiden Write More About a Scientist Free example essay on Matthias Scheilden: Matthias Scheilden was born on April 5, 1804. He was born in Hamburg, Germany. He died on June 23, 1881. He made a significant impact in science. He came up with a cell theory, which had a large effect of scientific attention to living processes as they happened on the cellular level. His work initiated the field of embryology. Scheilden first studied law in Heidelberg. In 1826 he received a doctorate and became an attorney in Hamburg, his hometown. He was not as successful in this as he hoped, and he did not enjoy this field of work. In 1832 he changed his mind about law and decided to study medicine in Goettingen. One of his teachers there got him interesting in botany. He went to Berlin in 1835 and spent time with his uncle, J. Horkel, and another man, Richard Brown. They were both scientists who studied mainly plant anatomy, and based most of their work on questions about the cell formation. Many scientists during this time were interested in the cell formation also. He investigated plants on a microscopic scale. This was very different from most other scientists who were only interested in naming and classifying plants. In 1837 he stated that plant growth came through the production of new cells from the nuclei of old cells, and that all plant tissues were composed of cells or derivatives of cells. He published this theory in 1938, in his paper ‘Contributions to Phytogenesis’. This theory was not made public until a year later when his friend and colleague Theodore Schwann published his ‘Microscopic Researches into Accordance in the structure and Growth of Animals and Plants’. He was the first scientist to recognize the importance of the cell nucleus and to correctly state that nuclei played a part in cell formation. Scheilden thought the cell was the center of the vital force. He believed each cell had an individual existence and the life of an organism came from the way in which the cells work together. He was proved wrong in later discoveries about the mechanics of the process though. In 1839 Scheilden received his second doctorate for his botanist work. He taught at the University of Jena from 1839 to 1862, and at Dorpat from 1863 to 1864. He worked for Johannes Muller and was influenced by two other scientists, Schelling and Oken. He also proved that a nucleated cell is the only original constituent of the plant embryo, and that the development of all vegetable tissues must be referred to such cells. Matthias Scheilden was a very intelligent and well-known man who will always be a big part of science history.

30 Top Mnemonics for Commonly Misspelled Words

30 Top Mnemonics for Commonly Misspelled Words A mnemonic- or  mnemonic device- can help students remember important facts and principles. Psych Central notes that a mnemonic is a technique people can use to help them improve their ability to remember something, adding: It’s a memory technique to help your brain better encode and recall important information. It’s a simple shortcut that helps us associate the information we want to remember with an image, a sentence, or a word. Students learn to rely on these little memory prompts, such as  ROY G BIV (for the sequence of colors in a rainbow), HOMES (for the names of the five Great Lakes), FANBOYS (for the coordinating conjunctions in English grammar), and Every Good Boy Does Fine (for the notes on the lines of the treble clef). Mnemonics for Life Though they are certainly a great help to school students, mnemonics- pronounced ne-mon-icks- arent just for children. In an article titled Stalking the Wild Mnemos: Research Thats Easy to Remember, educational psychologist Joel R.  Levin concluded:   Sufficient research evidence now exists to suggest that even skilled learners can become more skilled through mnemonic strategy acquisition and implementation. So while you may not admit it, you may sometimes fall back on mnemonics to recall the spellings of tricky words or commonly misspelled words. 30 Top Mnemonics Research suggests that the most effective devices tend to be the ones you make up yourself (and the sillier they are, the better). But some classic mnemonics can be very helpful. Below are 30 of the most popular spelling mnemonics. This word can accommodate a  double c and a double m.I â€Å"c† that you want to acquire it.When you  ascertain  a fact, be  as certain  as you can be.Gumbo lost an e in an argument.Bees will be coming to the becoming flowers near you.Never believe a lie.Dara checked the calendar every day.The cat’s egg is gory in this category.Eileen found herself at es in the cemetery.Emma faced a dilemma.Ed is  either here or there.Its hard to embarrass really righteous and serious students.A new environment will iron me out.Goofy Greg loved to exaggerate.I met my ex in PE;  what do you expect?That liar looks familiar.Generally, a general is your best ally.Mom ate immediately.In telling the gent, he showed he was intelligent.It would irritate me if you forgot the second r  in irritable, and don’t forget the table at the end.An island is land surrounded by water.I alone felt Elis loneliness.Miss Pell never misspells.Its necessary to remember the cesspool in the middle.Have a piece of the pie.Please keep quiet about my diet. Its better to give than  to receive.Rhythm helps your two hips move.Theres a rat in separate.Its truly hot in July. More on Mnemonics There are other types of mnemonic devices, including: Visual systems (creating a visual representation of the information)The mnemonic link system (creating a story based on a list)The count system (associating numbers with a series of items)The major system (converting numbers into consonant sounds) Mnemonics work by associating easy-to-remember clues with complex or unfamiliar data. Though mnemonics often seem illogical and arbitrary, their  nonsensical wording is what can make  them memorable. Teachers should  introduce mnemonics to students when the task  requires the memorization of information rather than understanding a concept. For example, memorizing the state capitals is a task that could be accomplished through a mnemonic device. Whether youre a student trying to ace that grammar homework assignment or research paper or an out-of-school adult seeking to brush up on your language skills, a few memory aids  and language tips can prove to be very useful.

Incidents Which Led to the Enactment of the Sarbanes-Oxley Act Research Paper

Incidents Which Led to the Enactment of the Sarbanes-Oxley Act - Research Paper Example This paper declares that corporation was involved in an elaborate scam and financial machinations, such as exaggerating the positive financial statements, performing transactions through the shady dealings, omissions and misrepresentations; and insider trading. In spite of the possible prevention of complete collapse, the Enron’s officers continued to hide the financial problems of the company. The Act is comprised of key provisions that describe the specific requirements, mandatory for preparing financial reports. This report makes a conclusion that the Enron’s scandal is considered to be a crucial moment in the history of the American economics and business, which has led to the enactment of the Sarbanes-Oxley Act in 2002. Relying on the â€Å"advanced experience of financial frauds†, American government developed the Sarbanes-Oxley Act addressing to the main pitfalls discovered during the whole â€Å"pleiads† of financial frauds and bankruptcies. Even though the SOX is recognized to be a major improvement to corporate governance, it still has significant constraints. Experts tend to criticize this Act, concluding that new provisions are not flexible and hardly achievable in real situations. Obviously, just enacting regulations and legal restrictions are not enough to prevent and deter financial reporting frauds. Probably such acts do not provide expected results, because human nature still lacks ethical educational and strong moral principles.