Thermosyphons :: physics

Tasked with the quest to economically and efficiently extend civilization into the Northern regions, the construction industry has been hindered by the presence of perennially frozen ground. The thermosyphon is a device that facilitates the harmonious union of structure and ice. This paper will serve as a tutorial on thermosyphons, and present an exploration into the physical concepts that allow their operation. The physical concepts and phenomenon that enable the operation of thermosyphons can at times be complex-but don’t be scared. This tutorial will start with the most rudimentary explanation of thermosyphons, and proceed from there to deliver more in depth examinations in a step by step process. Let’s get right down to business. The steps in thermosyphon operation are: STEP 1-Heat flows into the thermosyphon, STEP 2-Heat flows through the thermosyphon tube, and STEP 3-Heat is released into the atmosphere. Simply stated, a thermosyphon is a device which moves heat from one place to another. There are different types of thermosyphons which are used for different applications, but for the purposes of this primer we will concentrate on thermosyphons used by the construction industry to stabilize frozen ground. For example, consider a road built over permafrost.. In this situation it is desirable to keep the ground from thawing, otherwise the road embankment will be destroyed. A thermosyphon â€Å"collects heat† from the frozen ground. This collected heat is brought to the top of the thermosyphon and the cooling fins, where it is released into the atmosphere. In this way, the ground remains frozen. Now, the thought of frozen soil warming the atmosphere may be hard to grasp. This brings us to an important point about the thermosyphon- they only work when the ambient air temperature is below the temperature of the soil (less than 31 degrees Farenheight). With this in mind, we can consider thermosyphons from a different perspective; a thermosyphon increases the exposure of sub-surface soil to freezing temperatures. Another thought, although not totally correct from a physical standpoint, is that the thermosyphon brings cold into the soil. Let’s examine the thermodynamic process by which a thermosyphon operates. This process is outlined below in a step by step chronology. Step 1-There is an accumulation of the working fluid in the bottom of the thermosyphon. The most important factor that governs the choice of a working fluid is that it must have an extremely low boiling point. Permafrost soil is typically at a temperature of 31F and consequently the fluid boiling point should be less than 31F.

Jeronimo Martins Group’s Consolidated Balance Sheet Essay

Jeronimo Martins Group’s Consolidated Balance Sheet as of 31 December 2011 and 31 December 2010, has been analyzed respectively the correspondents values, structure and relevant changes for assets and Liabilities & Shareholder’s Equity with following conclusions: I.The main assets of Jeronimo Martins Group are noncurrent (about 75%) concentrated mostly in tangible assets (about 50%) followed for the intangible assets (about 18%); II.The current assets are mostly inventories and cash or cash equivalent; III.The main liabilities of Jeronimo Martins Group are current (about 55%) concentrated mostly in trade creditors, accrued costs and deferred income; IV.The noncurrent liabilities are mostly Borrowings; V.Total Shareholders’ Equity represent around 30% of Total Shareholders’ Equity and Liabilities; VI.The biggest changes in assets, 2010 to 2011, are referred to derivative financial Instruments (-78%) and Cash and Cash equivalents (74%); VII.Changes, 2010 to 2011, in current assets are 27,1% and noncurrent are 2,4%; VIII.The biggest changes in liabilities and total equity are referred to retained earnings (250%) and fair value and other reserves (-101%), provisions for risk and contingences (106%); IX.Changes, in 2010 to 2011, in current liabilities are 11% and noncurrent are -27% and total equity are 32,63%; The structure, values and changes listed above means that Jeronimo Martins Group had, in 2010 and 2011, mostly of its assets as noncurrent, which aren’t expect to be converted into cash or consumed within 12 month. The current ratio is below 1, so this company doesn’t have a big liquidity. Analyzed the 10 biggest companies in the food area, the current ratio is below those values observed such as in Dole food company (current ratio is 1,5). The current ratio is an entity ability to meet its current obligations or to maturing short term obligations, is an important measure of its financial health. This company present 0,406 (2010) and 0,464 (2011) current ratios, more current liabilities than current assets. The total debt to equity ratio represents the long term viability of the company, measure the degree of the indebtedness relative to its equity funding. This company present 2 (2010 and 2011) total debt to equity ratio, more total debt than equity, this imply that greater is this ratio greater is strain on the company to make regular payments to debts holders and higher is the risk of bankruptcy.

The Benefits of Attending an All-Girls School

Not every student can excel in a coeducational classroom, and thats why many students opt for single-sex schools. When it comes to girls, in particular, these important developmental years can be greatly enhanced by attending the right school. So, what are the benefits of attending a girls school? Why should your daughter attend a girls school instead of a coed school? Girls Schools Empower Students to Excel Many girls cannot achieve their full potential in a coeducational school. With the impact of peer pressure and the perceived need to conform to popular opinion and thinking, including the desire to be accepted, can all impact girls. These are just some of the reasons which make many girls suppress their own personalities and individuality in a coed academic setting. Left to their own devices in a single-sex environment, girls are often  more likely to take on challenging math and science subjects and engage wholeheartedly in serious sports - all things girls arent supposed to like. Competition is a Good Thing Girls will ignore gender stereotypes and develop their competitive side more fully in a single-sex academic setting. There are no boys to impress, no boys to compete for between other girls. They dont have to worry about being called tomboys. Their peers understand whats happening. Everybody feels comfortable being themselves. Laying Foundations for Leadership Women have made significant advances in the leadership arena. Hilary Clinton ran for the office of President of the United States. Clinton, Madeleine Albright, and Condoleezza Rice have been Secretary of State. Golda Meir was Premier of Israel. Margaret Thatcher was Prime Minister of England and so on. Carleton Fiorina was CEO of Hewlett-Packard. These excellent achievements notwithstanding, women still find it difficult rising to senior positions in any endeavor. Why? Because girls lack inspiring role models and appealing presentation of critical subjects like math, technology and science which give men the competitive edge in their career paths. Skilled teachers who understand girls and the way they learn can kindle a girls interest in non-traditional subjects. They can encourage a young lady to dream outside of the box and want a career as a captain of industry as opposed to just being a teacher or a nurse. Girls at Single-Sex  Schools are More Likely to Excel at Athletics Its true, and theres  research  to support this finding. Middle school girls are more likely to engage in competitive athletics than their peers at  coed  schools. A single-sex environment often feels empowering to students, especially girls, and encourages them to try new things. When boys arent around, girls are more likely to take a risk and try something new.   Girls Schools are Inspirational Learning and Living Environments Until youve actually spent time at an all-girls school, its hard to fully appreciate the environment of encouragement and inspiration that is created. When a school is limited to only educating girls, the pedagogy changes, and the science behind how a female brain works and how girls grow and mature all become part of the core educational paths set forth for students. Students report feeling more free to speak and express themselves, which leads to a stronger development of a love of learning.   Girls Schools may Offer More Opportunities to Succeed According to the National Coalition of Girls Schools, nearly 80% of girls school students report feeling challenged to the point of achieving their full potential, and more than 80% of graduates from all-girls schools report that they consider their academic performance as highly successful. Students enrolled in these single-sex environments also report having more confidence than their peers at coeducational institutions. Some even report that their college professors can spot an all-girls school graduate. An all-girls school can help your daughter be all she can be simply by encouraging and nurturing her. Everything is possible. Nothing is off limits. Resources Find Girls Schools here.The National Association For Single Sex Public Education enriches the debate with some compelling research.The Bromley Brook School for Girls makes a great case in its Philosophy article. Article edited by  Stacy Jagodowski

Individual Learning Styles Essay - 3520 Words

Individual Learning Styles The purpose of this research paper is to examine learning styles theories to determine if teaching students to use their own particular learning style can help ail them in increased educational success. The learning style aspect consists of six key areas including brain processing, sensory modalities, physical needs, environmental preferences, social aspects, and attitudes. Besides the way a person operates, there are two other important factors that play a key role in effecting a person?s learning style. These important factors include each individuals learning patterns and a theory known as multiple intelligences. Individual learning patterns are focused on four main types ES, IN, EN and the IS. The†¦show more content†¦Now the student will have become a more effective learner, this will force the student to take responsibility for unlearned and unprepared material by taking the blame off of the teachers and placing it on the person at hand, the lazy student. Depending on the student, each one has their own and unique learning style that effects not only how they learn, but their concentration and the way in which they process the information given to them. The concept of left and right brain dominance has a great impact on the effectiveness of each students learning ability. And although age is an important factor concerning the way in which the student is able to learn and retain the information, the following 6 ways in which the individual operates pertain to students of all ages (Campbell, L., Campbell, B., 1999). Brain processing, or the way in which the brain is able to take in and perceive the information is the first of the six, and is important in understanding learning styles, this is where the left brain vs. right brain learning concept takes place. It is important to understand both sides of the brain and their ability to reason, however, they use different strategies and it may appear that one side is dominant to the othe r. The left-brain is known as a successive processor, which simply means that students who dominate in their left-brain learn step-by-step. These types ofShow MoreRelatedLearning Styles And How Each Individual Has A Dominant Way Of Learning1846 Words   |  8 PagesThe topic under discussion within this paper is that of learning styles and how each individual has a dominant way of learning. There are many types of ,learning styles which are being discussed throughtout the paper and the succussfulness of these theories. 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Using the style enables one skill to become the input of another through the transfer of the ability to read to that of writing. The skills transfer is integral in raising the awareness of how the structural components involved inRead MoreEssay about Vark Learning Style Analysis1006 Words   |  5 Pageshead: VARK LEARNING STYLE ANALYSIS VARK Learning Style Analysis Kathleen Nash Grand Canyon University NRS-429V, Family Centered Health Promotion July 22, 2012 VARK Learning Style Analysis The VARK learning preference tool provides individuals with information that they can utilize to enhance their learning process by helping them to study more effectively and efficiently. The VARK tool consists of a questionnaire that the learner takes to identify which senses the individual uses to capture

How Teens Have A Sexual Education - 1081 Words

Most teenagers today are sexually educated but where they getting their information is the real question. Most teenagers had a sexual education class as their primary source of basic knowledge when they were younger or in elementary school. As kids get older, many learn about sex from their parents, siblings, friends and the media. My survey found most teenagers still went to their parents for some questions or problems but their friends are a very important source for information also. Social media or television also provides a lot of answers to many questions while allowing teens to stay anonymous. It seems that the severity of the issue or question determines where teenagers will find their answers. According to a Planned†¦show more content†¦Ã¢â‚¬Å"But if you haven’t been talking to your kids about their daily all along, asking about sex isn’t going to elicit any information.† (Dr. Daddis, 2010, New York Times, para. 5). He goes on to say that teens aren’t purposely withholding information, but they are trying to figure out what is mom and dad’s business. This article also points to teens not being completely open with their parents unless there is a major problem. It is important to keep the communication lines open from a very early age. If teens become used to sharing information with their parents regularly, it won’t be so hard to talk about important sexual issues. If teens aren’t getting sex education from their parents, they turn to their friends or the media. Much of the information they get from their friends is incorrect or incomplete. Friends often get their information from other friends or the media. The last thing parents or teens want to is to get the wrong information. â€Å"Although the media is full of sex and sexuality, it is mostly depicted in the most sensational and superficial sense. Realistic portrayals of relationships and sexuality are rare. More often, issues around sex and sexuality appear either without any context or without any emotional or relationship component. Moreover, the risks of sexual activity are often hyped beyond the point teens will believe.†

New Industries and Administration Free Essays

The Meiji government during the 1880’s created both an institutional and constitution structure that allowed Japan in the coming decades to be a stabile and industrializing country. Two major policies and strategies that reinforced stability and economic modernization in Japan were the creation of a national public education system and the ratification of the Meiji constitution. Both these aided in stability and thus economic growth. We will write a custom essay sample on New Industries and Administration or any similar topic only for you Order Now The creation of a national education system aided in creating stability because it indoctrinated youth in the ideas of loyalty, atriotism, and obedience. Japan’s education system at first stressed free thought and the ideas of individual’s exploration of knowledge but by 1890 the education system of Japan became a tool for indoctrination into what Peter Duus calls â€Å"a kind of civil religion† with the Imperial Rescript on Education. This Rescript stressed two things. First, it stressed loyalty to the emperor and to a lesser extant to the state. In every classroom a picture of the emperor was placed. Second, the education system stressed self sacrifice to the tate and family. Filial piety was taught in schools and applied not only to the family but also to the national family which included father, teacher, official and employer. The Japanese education system also created a system of technical schools and universities both public and private that educated a growing class of Japanese on how to use new western machinery, administrate government and run private industries. The Japanese education system following the Rescript on Education served primarily to teach people what to think nd not how to think; and as Edwin Reischauer stated, â€Å"Japan pioneered in the modern totalitarian technique of using the educational system for indoctrination and was in fact decades ahead of countries like Germany in perfecting these techniques. Japan’s education system was a tool in creating for Japan a reliable citizenry who respected the government and had the knowledge to act as â€Å"technically efficient clogs† in the new industries and administration that an The ratification of the Meiji constitution drafted in the ummer of 1887 and signed into law in 1889 helped create a stable constitutional order in Japan. The constitution was a gift of the emperor to the people and was made up of a complicated set of checks and balances between the emperor, his cabinet, and the Diet. The constitution although it granted voting rights to only one percent of the population in Japan was well received by the people and played a critical role in lending legitimacy to the oligarchy (Genro) who ran the government. Before the constitution the Genro had little basis in heory for their continued rule other then they spoke for the emperor. But the constitution with its elections and bicameral diet lender legitimacy to the rule of the oligarchy. The constitution also brought Japan at least in the minds of the oligarchy to parity with western political institutions. Indeed, the ruling group in Japan passed the constitution through not because of popular pressure but because they thought a constitution and parliamentary government was a necessary part of the political machinery that helped make western powers trong. In the long term the parliamentary government of Japan and its constitution provided a stable government with its mix of oligarchy, monarchy, and a little democracy for the wealthy. It ensured investors and the Zaibutsu a say in government and promoted growth by creating a stabile government that was critical to ensuring investors will put capital in businesses. Both the new education and governmental structure of Japan passed in the 1880’s and 1890’s was essential to Japanese stability and economic and industrial growth. How to cite New Industries and Administration, Papers

The Ethnographic Work of Cross-Cultural Memoir

Question: Define The Ethnographic Work of Cross-Cultural Memoir? Answer: According to the question, the overall story of this book is overall based on the authors life in Fuling. On this story, authors main reflection was on the landscape in the locality, history and local stories of that locality, and the main theme is the people of that area named Fuling. This Fuling is a small town in China. According to the authors story, this is a river town. The author tries to highlight his involvement in the local life. He tries to share some interesting moments of two years experience in the town. As per Besemeres (2010), the author used some pseudonym of the local characters that he described in the book, in case the main subjects and storyline of the book is very sensitive. He did not change some name of the popular places like The Yangtze or Hong Kong. Whereas, according to the story of the book is not based only on China. This story is based on a certain part of the China. Whereas the well known place, The Murky Yangtze, the green mountain where the author li ved, some moments are more difficult to describe the experience gained by the author. Soder (2008) opined that the people of the town were always in full of life and they all staying alive by the help of one most valuable thing, that thing was hope. That is the main conclusion of the authors story. The author gained these experiences to spend two years in the River Town: Yangtze. References: Besemeres, Mary. "The Ethnographic Work of Cross-Cultural Memoir." Auto/Biography Studies25.2 (2010): 219-230 Soder, Roger. "Books for Summer Reading."Phi Delta Kappan89.10 (2008): 741