The relationship between Eliezer and his Father Essay

The relationship between Eliezer and his Father - Essay Example Just as the story begins, Eliezer’s father comes in as a busy community leader. His duties and community engagements leaves him little time to socialize and bond with the family. The lack of connection between father and son pushes Eliezer to lament. â€Å"My father was a cultured man, rather unsentimental. He rarely displayed his feelings, not even with his family, and was more involved with the welfare of others than that of his own kind† (Bloom 02). However, as they enter the camp they display a normal relationship between them, the father values his son, he gives him advice and protects him. The son on the other hand depends and looks up to his father this mainly happens because of horror scare at the camp. The situation at the camp changed the angle of relationship between the two. They had little options at the camp because at arrival his father was no longer a community leader and neither was he busy. In this situation, they could focus on each other in order to deal with the situation at the camp. Eliezer kept his eye on the father and his determination to be with him kept on burning. He says, â€Å"My hand tightened its grip on my father. All I could think of was not to lose him. Not to remain alone† (Bloom 8). As time passes by in the camp the duo, develop a peer like relationship. People who are involved in this kind of relationship help each other in terms of ideas and code of conduct. The two demonstrated their codependency when Franek asks for Eliezers’s gold crown. Eliezer’s refusal to give away the golden crown prompts Franek to beat up his father for not matching well. To prevent this from happening again he decides to teach his father how to match in steps. Near the end of their stay in the camp Eliezer and his father, reverse roles where, he plays the role of a father and his father plays a childish role. The novel illustrates that after they had run to Gleiwitz.

John Locke Essay Essay Example for Free

John Locke Essay Essay John Locke, a philosopher of the Age of Reason and the Enlightenment, greatly influenced the American revolution and the French revolution. His beliefs were the social contract, natural rights, and the right of revolution. One of John Lockes beliefs was the social contract. A social contract can be either a written or unwritten agreement between a government and its people. Social contracts usually contain a basic set of laws and agreements explaining how the country should be run. Examples of a Social contract are the US constitution and the Declaration of the Rights of Man. John Locke was a huge influence for both of these documents. Locke also believed that every person has natural rights. A natural right is a basic right that every citizen should be born with. Locke said that everyones natural rights were the right to â€Å"life, liberty, and property. † These natural rights have been quoted and used many times in history. Thomas Jefferson was influenced by this while writing the Declaration of Independence, saying that all men are created equal and that they have the right to life, liberty, and the pursuit of happiness. Lastly and most importantly, Locke believed in the right of revolution. The right of revolution is the belief that if that a government does not meet the basic needs and wishes of its people, then the people have the right to revolt and overthrow that government. Examples of this are the American and French revolutions. The Americans revolted against England because they failed to grant them the basic rights stated in their social contract, saying no taxation without representation. The French revolted against their government because King Louis caused the countries economy to be almost non existent and most of the country had nothing to eat. Both these revolutions led to the rise of democratic nations. John Locke is one of the most influential people in history. His beliefs has influenced the formation of many countries, including our own. His ideas have be restated and reused throughout history, and still influence people today.

Harriet Beecher Stowes Uncle Toms Cabin Essay -- Uncle Toms Cabin E

Harriet Beecher Stowe's Uncle Tom's Cabin "The Kitchen is Seasoned With Love" The above quotation is stamped on countless refrigerator magnets and embroidered on dishtowels across the world; and yet, how many of us ever stop to think about what it really means? After all, why is it important that a concept as ethereal and abstract as love should have significance in the kitchen, a place supposedly reserved for preparing that which is necessary only to maintaining the physical body? This question can perhaps be best answered by the â€Å"little woman† named Harriet Beecher Stowe, in her novel Uncle Tom’s Cabin – written before we even had refrigerators, much less magnets bearing heartwarming little proverbs. Whereas it may at first be overlooked, the description of different types of kitchens in Uncle Tom’s Cabin is in fact a recurring theme in the novel and not to be trivialized. On the contrary, Harriet Beecher Stowe uses the image of the kitchen to encompass one of the most pertinent aspects of her argument against slavery: that of the importance of the home and domestic life in the fight against oppression and injustice. An indoctrinated member of the infamous â€Å"Cult of True Womanhood,† an unofficial sisterhood designed to combat women’s lack of physical and political power by encouraging them to develop the power of influence, Stowe uses representations of the ideology of this alliance – whose central tenets are piety, purity, submissiveness, and domesticity – as weapons in her narrative battle against slavery’s evils. She aims these weapons straight at the heart of female readers belonging to the same sisterhood, especially mothers ; and with what territory should her feminine readership be more closely acquainted... ...ey into freedom. Finding meaning in Stowe’s use of kitchen imagery is not too difficult a task; her comparison of Chloe’s and Dinah’s kitchens shows the almost polar variations that can occur in slaveholding households, but the ultimate destruction that takes place in both homes proves that no matter how things may at first appear, tragedy will always be the result when slavery is at the core. The only way that true harmony can be achieved is through a system that is not based on slavery, as seen in the example of Rachel Halliday’s Quaker kitchen, where the scenarios of the other households are reversed, and the result is a hopeful end for the sufferer through the kindness of a fellow human being. Now it is up to us as readers to conduct our own kitchens with the same values of motherly nurturing, compassion for one’s fellow man, and most importantly, love.

Of Mice and Men Importance of Friendship George and Lennie

Of Mice and Men has many themes presented by Steinbeck, one of which is about friendship. The novella shows the relationship between the protagonists, George and Lennie, and showing how they try to achieve the American Dream by working together. This is in contrast to many of the other characters who are alone by themselves which seems to be the norm at the time of the Great Depression. The reader is able to look at how the need to have a companion is portrayed by Steinbeck, especially during the harsh economic times that the story is set in.The reliance that George and Lennie have on one another is able to emphasise on how it is only the friendship between the two of them which allows them to survive. Lennie saying ‘I got you to look after me, and you got me to look after you. ’ is underlying the true reliance that both George and Lennie have for one another. Lennie also sees his friend ‘he pulled his hat down more over his eyes the way George’s hat was. â €™ as a role model and sees him as guidance as to how to live his own life. George needs Lennie as much as Lennie needs George despite Lennie being the one who is mentally challenged and in need of constant supervising.Steinbeck also uses the character Lennie to refer to how it should society should be collectively looking after the vulnerable in society rather than George having to look after him by himself. Thus the reliance of each of the main characters on one another emphasises how important the friendship is in keeping both them and the novella together. The friendship is also portrayed by Steinbeck as he is opposing the idea of people working just by themselves. â€Å"Guys like us, that work on ranches, are the loneliest guys in the world. They got no family.They belong no place†¦they ain’t got nothing to look ahead to. †Ã‚   is showing what Steinbeck sees of the idea of itinerant workers being by themselves. This is despite the fact it would have much likely to be easier during the time of the Great Depression to be by yourself and have a sustinent way of life. Yet Steinbeck emphasises friendship by looking at how unhappy the people who are by themselves are. The fact that Lennie who can only understand basic ideas is able to see the migrant workers as ‘lonely’ goes to point out how a companion is needed to be able to live a happy life.They are also said to have ‘nothing to look ahead to,’ which counters the idea that people are able to achieve the American Dream just through hard work and determination from ‘rags to riches’. As a pair they are going against the ideology of ‘every man for himself’ which is preached as w Thus George and Lennie being together can be seen to show how they are closer to achieving the dream as a result of being able to work together. They are able to share the dream between one another which makes it a serious possibility.The circular narrative which then destroys the dream only makes it more tragic as it seems as if they had a possibility but there never was. This is what Steinbeck uses to undermine the idea of the American Dream for it is not even realistic despite co-operation. Thus due to the economic depression, Steinbeck shows that friendship is important to be able to cope through the difficult times The friendship is also important in comparing to other characters in the novella that are depicted as lonely as well as being the vulnerable in society.Curley’s wife is seen as one of the most isolated characters ‘Think I don’t like to talk to somebody ever once in a while. ’ for all she desires is attention and for people to take notice of her. The fact that she has no-one to be with is what leads her to acting in a promiscuous manner and eventually this is also a cause of her death. Thus the strive to be happy without a friend can be fatal. Crooks is also a person who strives for friendship, â₠¬ËœS'pose you didn't have nobody. S'pose you couldn't go into the bunk house and play rummy 'cause you was black. ’ but it is unable to get it because of his colour.This is also emphasises the oppressive nature of society at the time because Crooks is lonely for he has been segregated. Although most of the men have no true friends, they at least get to play cards and associate with others. Lennie, because of the colour of his skin and his friendship with George, cannot possibly understand Crooks' plight. George chooses to kill Lennie at the novel's end, realizing that Lennie could not stand the loneliness of being locked up in a prison or an asylum. This is also able to highlight the true friendship which is separated at the end which also brings an end to the novella.Thus the need for companionship, which is shown by other characters that are victimised within society, is emphasised as other strive for what George and Lennie have. Throughout the book Steinbeck uses many char acters to emphasize a message which he wants to get across to the reader. This is how the importance of being able to share a friend was vital during the 1930’s as it was the time of the Depression era and everyone always needed someone else to be with. This is what makes the true friendship between George and Lennie a key component of the novella.

Traditional Leadership

Traditional Leadership And E-Leadership A Study of Organizational Effectiveness In Today’s Scenario. CONTENTS TOPIC PAGE NO. 1). INTRODUCTION 3-7 2). NEED FOR THE STUDY 8 3). OBJECTIVE OF THE STUDY 9 4). SCOPE OF THE STUDY 10-11 ). RESEARCH METHODOLOGY 12 6). LITERATURE REVIEW 13 7). EXPECTED CONTRIBUTION OF 14 THE RESEARCH WORK INTRODUCTION It has been accepted as a truism that good leadership is essential to every concern whether its business government or countless groups of organizations. Leadership shapes the world we work, play and live. If Leadership is such a crucial factor then, the critical issue is: What makes a great leader? It’s tempting to answer: Great followers! Although there lies some truth in this response the issue is much more complex. Leadership has been described as the â€Å"process of social influence in which one person can enlist the aid and support of others in the accomplishment of a common task†. A definition more inclusive of followers comes from Alan Keith of Genentech who said â€Å"Leadership is ultimately about creating a way for people to contribute to making something extraordinary happen. The source of such influence can be formal, such as one provided by the possession of managerial ranks in organizations. But not all the leaders are managers and the vice-versa also holds equally true. Non-sanctioned leadership-that is, the ability to influence that arises outside the formal organization- is as important as or more important than formal influence. In other words, leader s can emerge from within a group or can be formally appointed. It comes clearly that leadership is a process of influencing others towards achievement of a goal. It is this influence part that makes this concept so crucial. As a practice, leadership is as old as mankind or even more, but as a concept of study it is of a recent origin. In the past few years numerous literatures has been developed to lay emphasis on the topic. Numerous studies have been done and theories have been developed. All these theories have one thing in common, and that is the influencing others factor. Over the year’s world has never remained stagnant and same is the case with leadership also. With time new concepts and paradigms have been added while the old ones generally remains after accommodating certain new phenomenon. Since the time the concept has been formally studied, numerous theories have been developed to explain its dynamics. Some of the well read and accepted theories of leadership are the Trait theories, Behavioral theories (Ohio State Studies, University of Michigan Studies and The Managerial Grid) and Contingency Theories. The above said three theories are considered as the traditional theories of leadership . It is with these studies that leadership has achieved its present status of a formal topic of study, if not a separate discipline. The latest paradigm in the study of leadership is the concept of E-Leadership. The concept has emerged as an answer to the question of bringing together, the skills and talents across national, geographic, cultural and other boundaries, using communications technologies tools to achieve results. E-Leadership stands for balancing many roles and carrying them out via communications technologies. E-leadership has emerged as solutions to the issues emerging at the back drop of the development of virtual organizations and global village. Organizations today are found using the concept of E-leadership in order to integrate their human and material resources, which may lie across national boundaries, to achieve organizational goals and to increase their organizational worth. Under such organizational structure, where it is not possible to arrange frequent meetings or any such face to face interactions between personnel, and the orders and permissions has to travel thousands of miles within seconds, E-leadership can be the solution to such critical issues. E-leadership is a term used when a leader must preside over a geographically dispersed or virtual team. Not being physically close to your subordinates poses many problems for a leader. An e-leader thus must be particularly effective at team building and communication in non-traditional modes. Since face-to-face communication is absent, e-leaders must encourage frequent communication and use multiple modes of communication where appropriate. In order to facilitate group cohesion, it may behoove the leader to gather the team together initially to have a face-to-face meeting so team members can get to know each other personally. If this is not possible, frequent group discussions should be directed by the leader online to ensure communication between group members. E-leaders must also impose structure and routine on the group by setting goals for team members and tracking their progress. This will help team members make sure they are making progress and will help them feel like they are a valuable part of the team. Proponents of E-leadership are promoting the concept in order to increase the organizational worth and in the process the concepts of traditional theories of leaderships are been found undermined. Although e-leadership has its drawbacks, it also has some advantages and in some cases is simply required. Below are some of its advantages: †¢ It allows for the fastest responses and best ways to keep up with the competition (e. g. , benchmarking). †¢ It allows for employees to work at home (i. e. , telework), which in some studies has been shown to reduce work-family conflict. †¢ This allows for complementarities of skills – that is, a leader can create a really effective team by choosing the best candidates from a wide variety of locations. Since team members come from many different places, they may be able to provide unique perspectives, enhancing the team’s creativity and innovation, which may lead to an increase in productivity Through case studies of organizations, this research paper is an attempt to bring out the contribution of traditional theories in the determining organizational effectiveness and the contribution of E-leadership in the same. Through this research work it would be seen as to how E-leadership would assure true motivation of group members in a virtual organization when members are physically not visible to one another. NEED FOR THE STUDY The changing requirements of organizations in the context of cross border, cross culture functioning which calls for higher leadership effectiveness is the first and foremost need for doing research on this field. Also the increasing literary emphasis on changes in addition to the existing patterns of traditional leadership styles also arises the need to study this phenomenon. The new evolving concept of E-leadership is also redefining the traditional practices of leadership in today’s context in various organizations. OBJECTIVE OF THE STUDY 1. Research would aim to provide a new insight into the practice of leadership, its basic concepts, theories, and advantages leadership. 2. The research would aim to analyze the importance of leadership in the current business scenario. 3. Through certain organizational case studies, the research would bring out clearly the changing trend in styles of leadership being adopted in the organization. 4. To make a detailed comparison between traditional leadership and E-leadership styles in the context of current business environment and to indicate as to how they are complementary to each other. SCOPE OF THE STUDY The practice of leadership is found to be ages old. Over the period of time as the requirements changed, new styles and practices came in use to aid the old ones. Sometimes such new practices comes as an addition to the existing patterns while sometimes they come as a replacement of the old and redundant styles. E-leadership is a new and upcoming concept in the field of leadership studies and practices, which is an addition to the existing styles. Though much has been talked about the concept, there is still scope for studies left. There is a lack of scholarly writings and research in the sense that how organizations can aid their leadership styles with that of E-leadership practices in order to make it much effective in today’s context. There exists volumes of management literature dealing with the topic of leadership but only a partial fraction of it is found dealing with E-leadership. This makes the scope of study wider. There exists wide opportunity for research work in the field so that the concept is introduced in regular management literature. Owing to the changing dynamics of business and other concerns, E-leadership is the pattern of the future. In times to come it would be the buzz for organizational effectiveness. Thus research-backed studies are essential for the topic to get its due importance. Such scholarly works would help introduce the topic in regular management studies. Such requirements make the scope of study amply wide. The study would cover the traditional leadership styles, its origin, features, its usage, and advantages. My research would also show how each of the traditional theory emerged as an answer to the shortcomings of the earlier ones thus making a chain. It would then study the recent practice of E-leadership, its origin, and usage and benefits. After analyzing the two, my research would aim to indicate as to how E-leadership is a practice for enhancing the leadership effectiveness and not a concept that aims to replace the studies of traditional leadership. This would be done through case studies of numerous organizations. Such scope makes the scope amply wide for an in-depth research work. LITERATURE REVIEW Owing to the wide scope of my study I aim to undergo wide survey of literature. My literary survey would include all the management literature dealing in the topic of leadership. Various journals, articles, magazines and other available research works of similar nature and scope would aid the study. Internet and the articles available on various websites would act as indispensable tool for the purpose. I aim to undertake personal interview of certain managers in organizations who are in into the application of E-leadership practices. This would enable me to take the first hand experience of those who are using the concept. The responses of the respondents would act as a primary data. Reports of various organizations on its work culture and recent trends and practices would also be referred. This would help in determining the changing work culture in organization. Other articles related to the matter, if any, which would be needed in the course of study, would also be referred to. For the purpose libraries of certain institutes and universities would be relied upon. RESEARCH METHODOLOGY Having defined the need for the study and setting out research objectives it is necessary to make a research design. Research design specifies the method and procedures for collection of requisite analysis to arrive at certain meaningful conclusion at the end of the proposed study. In the initial stages up to the final designing of the research work, I intend to use both descriptive as well as exploratory research designs It will include detailed study of related literatures and in-depth interviews with managers of some of the organizations. In the later stage of the research work I intend to use Conclusive Research Design. For this descriptive methodology will be used by me. All this will help to find a definite solution for the research problem and for drawing specific conclusion regarding the problem under study. SAMPLE DATA In this research I intend to keep the sample data as 200, which will include entrepreneurs and managers of few organizations as well as employees, so as to be able to have a better understanding of the changing scenario of leadership styles in today’s organization. EXPECTED CONTRIBUTION OF THE RESEARCH WORK . Will be able to understand the concept of leadership and its various theories. 2. Will be able to have a better insight about the traditional leadership being used in various organizations. 3. Understand the evolving concept of E-leadership and its application in the organizations. 1. Will be able to do a detailed comparative study of the two kinds of leaderships and their impact on th e organizations in the current market scenario. 2. Will be able to recommend to the organization the various advantage and disadvantages of adapting a particular kind of leadership.

Heavy Water Facts

Heavy Water Facts Heavy water is deuterium monoxide or water in which one or more of the hydrogen atoms is a deuterium atom. Deuterium monoxide has the symbol D2O or 2H2O. It is sometimes referred to simply as deuterium oxide. Here are facts about heavy water, including its chemical and physical properties. Heavy Water Facts and Properties CAS number 7789-20-0 molecular formula 2H2O molar mass 20.0276 g/mol exact mass 20.023118178 g/mol appearance pale blue transparent liquid odor odorless density 1.107 gm/cm3 melting point 3.8C boiling point 101.4C molecular weight 20.0276 g/mol vapor pressure 16.4 mm Hg refractive index 1.328 viscosity at 25C 0.001095 Pa s specific heat of fusion 0.3096 kj/g Heavy Water Uses Heavy water is used as a neutron moderator in some nuclear reactors.Deuterium oxide is used in nuclear magnetic resonance (NMR) spectroscopy in aqueous solutions involving the study of a hydrogen nuclide.Deuterium oxide is used in organic chemistry to label hydrogen or to follow reactions involving water.Heavy water is often used instead of regular water in Fourier Transform Infrared Spectroscopy (FTIR) of proteins.Heavy water-moderated reactors are used to produce another isotope of hydrogen - tritium.Heavy water, made using deuterium and oxygen-18, is to test human and animal metabolic rates via the doubly labeled water test.Heavy water has been used in a neutrino detector. Radioactive Heavy Water? Many people assume heavy water is radioactive because it uses a heavier isotope of hydrogen, is used to moderate nuclear reactions, and is used in reactors to form tritium (which is radioactive). Pure heavy water is not radioactive. Commercial grade heavy water, much like ordinary tap water and any other natural water, is slightly radioactive because it contains trace amounts of tritiated water. This does not present any sort of radiation risk. Heavy water used as a nuclear power plant coolant contains significantly more tritium because neutron bombardment of the deuterium in heavy water sometimes forms tritium. Is Heavy Water Dangerous To Drink? Although heavy water isnt radioactive, its still not a great idea to drink a large volume of it because the deuterium from the water doesnt act quite the same way as protium (a normal hydrogen isotope) in biochemical reactions. You would not suffer harm from taking a sip of heavy water or drinking a glass of it, but if you only drank heavy water, youd replace enough protium with deuterium to suffer negative health effects. Its estimated you would need to replace 25-50% of the regular water in your body with heavy water to be harmed. In mammals, 25% replacement causes sterility. 50% replacement would kill you. Keep in mind, much of the water in your body comes from the food you eat, not just water you drink. Also, your body naturally contains small amounts of heavy water and every smaller amount of tritiated water. Primary Reference: Wolfram Alpha knowledgebase, 2011.

Moles Of Iron And Copper Formal Lab

Moles Of Iron And Copper Formal Lab Purpose: By doing this lab we were going were trying to determine a couple things. What we were trying to determine was the amount of moles of copper and the amount of moles of iron in the chloride and in the nail.Procedure: 1. Put on your laboratory apron and safety goggles. Use a 100-mL beaker to make a solution with 2 grams of copper(II) chloride and 15-mL of distilled water.2. Use a stirring rod to make sure all of the copper(II) chloride crystals have dissolved.3. Obtain two clean, dry nails. Use a piece of sandpaper or emery cloth to shine the nails. Make sure that the nails can rest on the bottom of the beaker.4. Place the nails in the copper(II) chloride solution. Leave the nails alone for approximately 20 minutes. During that time, you should see the formation of copper in the beaker. At the same time, some of the iron will react.Copper(II) chloride5. Use tongs to pick up the nails, one at a time. Use the wash bottle to rinse any remaining copper from the nails before removi ng them completely. Set nails aside.6. Decant the liquid from the solid. Put the liquid into another beaker so if some solid comes out you can get it back.7. Rinse the solid again with about 15-mL of distilled water. Decant again. Repeat this 3 times.8. Wash the solid with 10-mL of 1M hydrochloric acid. Then decant. Wash again with 15-mL of distilled water and decant.9. Place the beaker with the copper in a drying oven. Make sure the beaker had identification on it so you can get it the next day.10. Clean up all materials and wash hands thoroughly.Data: -Mass of the nail before put into solution = 2.87 grams.-Mass of the nail after the copper chloride solution = 2.21 grams of Iron. Difference of = .66 grams of copper. From the nail there was .66 grams of copper and 2.21 grams of Iron.-In moles; Copper: .66g x 1 mol/63.5g = .01 moles of Copper. (Solving: Take the amount of the remaining copper from the nail, .66 grams, and multiply that by 1 mol over the molar mass of copper, 63.5 gr ams. Your grams cancel out, so you solve and get .01 moles.) -For the mole of Iron; 2.21g x 1 mol/55.8g = .04 moles of Iron. (Solving: You solve it the same way that you would solve the above equation only with Iron's molar mass.) Conclusion There are about .01 moles in the copper from the nail. I observed the copper being broken away from the nail and the different color change in the nail. It turned to a copper looking color. There were little air bubbles all over the nail. For the iron, there were about .03 grams of iron in the nail. The copper and the iron different in moles and mass. The form of chloride that was made is FeCl2.Theory: The mole is a standard measurement of how much of a substance there is. The theory that the number of formula units in a given substance is equal to the amount of formula units in 0.012 kilograms of Carbon is related to everything. So 12 grams of Carbon has 6.02 times 10^23 formula units. A mole's mass is the same as the atomic mass of the element it that is being used in the problem. A scientist came up with the number 6.02 x 10^23 formula units. The name, Avagadro's number came from this. The label of formula units can be said in a number of different ways. Just a couple ways you could label them are, atoms or particles. Depending on the situation, almost any label can be used. The mass of a mole never changes though. Every mole has a mass of 6.02 times 10^23. That is the theory of the mole. (www.avogadro.co.uk/chemist.htm)(www.chemistry.org) Evaluation: At the end of the experiment, my lab partners and I were able to determine the amount of moles of copper and the amount of moles of iron in copper chloride and a nail.

Seven Monologues for Young Females

Seven Monologues for Young Females Many play directors require actors to audition not merely with any memorized monologue, but with a monologue that is specifically from a published play. Most actors search and search to find a monologue that is age-appropriate for them and is not one that is used so repeatedly that directors have grown tired of hearing it. Below are seven  monologue recommendations for young female actors. Each one is short in length- some as short as 45 seconds; some a bit longer. Because of copyright restrictions and respect for the playwright’s property, I can only give you the beginning and ending lines of the monologues. No serious actors, however, would ever prepare an audition piece from a play that they had not read (and often re-read) in its entirety. So, take a look at these recommendations and if there are any that you think might work for you, get a copy of the play from the library, a bookstore, or online. Read the play, locate the monologue, and make notes about the character’s words and actions before and after the monologue. Your knowledge of the whole world of the play and your character’s place in it will make a definite difference in your monologue preparation and delivery. Story Theatre by Paul Sills In â€Å"The Robber Bridegroom† story The Miller’s Daughter A young girl is betrothed to a stranger that she does not trust. She makes a secret journey to his house in the depths of the forest. Monologue 1Begins with: â€Å"When Sunday came, the maiden was frightened, but she did not know why.†Ends with: â€Å"She ran from room to room until at last she reached the cellar....† On her wedding day, the young girl tells the story of a â€Å"dream† she had. This dream is really a report of the incident she witnessed at the house of her betrothed and it saves her from marriage to this man. Monologue 2Begins with: â€Å"I will tell you a dream I’ve had.†Ends with: â€Å"Here is the finger with the ring.† You can read more about this play here. I and You by Lauren Gunderson Caroline Caroline is a 17-year-old teenager with a liver disease that confines her to her bedroom. She explains a little bit about her disease and her life to her classmate Anthony. Monologue 1: Towards the end of Scene 1  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Begins with: â€Å"They tried a ton of stuff and now we’re at the point where I just need a new thing.Ends with: â€Å"...it’s suddenly full of kittens and winky faces and ‘We miss you, girl!’ and that is NOT my style!† Caroline has just suffered through an episode that leaves her weak and cramped. When Anthony finally persuades her to relax and talk with him again, she explains how she feels about her disease and her life. Monologue 2: Towards the beginning of Scene 3Begins with: â€Å"Yeah it just happens like that sometimes.†Ends with: â€Å"So that’s one of the many super discoveries of the past few months: nothing is good ever. So yeah.† Anthony records Caroline’s presentation of their school project on his phone. She explains her analysis of Walt Whitman’s use of the pronoun â€Å"You† in his poem Song of Myself.† Monologue 3: Towards the end of Scene 3Begins with: â€Å"Hi. This is Caroline.Ends with: â€Å"Because you is very much...we.† You can read more about this play here. The Good Times Are Killing Me by Lynda Barry Edna Edna is an adolescent who begins the play with this explanation of the urban American neighborhood she lives in during the 1960s. Monologue 1: Scene 1Begins with: â€Å"My name is Edna Arkins.†Ends with: â€Å"Then it seemed like just about everybody kept moving out until now our street is Chinese Chinese Negro Negro White Japanese Filipino and about the same but in different orders for down the whole street and across the alley.† Edna describes her fantasy of being the star of â€Å"The Sound of Music.† Monologue 2:  Scene 5Begins with: â€Å"The hills are alive with the sound of music was the first best movie I ever saw and the first best music I ever heard.†Ends with: â€Å"I could always tell the difference between God and a street light.† You can read more about this play here. You can read information about  preparing a monologue here.

Managing A Law Firm Essay Example | Topics and Well Written Essays - 500 words

Managing A Law Firm - Essay Example Strategically located: Most of the time, the structure, location, and appearance of the office makes a lasting impression on potential clients. The law firm should consider the appearance as not â€Å"too intimidating† to clients. It should have a cozy but professional atmosphere which would be inviting and stimulating to conduct business transactions. Appropriately promoted: Several marketing strategies to promote law firms are easily available depending on the budget and the objectives of the firm. The build a good image, the following marketing strategies could be of assistance: â€Å"a. Identification of the firm name and that the firm is a "full service" law firm. b. Publication of articles both in legal and trade magazines. c. Participation by attorneys in positions of authority and leadership in civic, social and religious organizations and bar associations. d. Develop firm stability, public concern, and a sense of paying "civic rent" by financially supporting, or offe ring pro bono services to, worthy community activities as a firm, where appropriate. e. Each member of the firm was sensitized to become increasingly aware of the use of the media. f. Institutionalizing the name of the firm by use of stationery that increases the emphasis on the name and changes the emphasis of listing individual attorney's names by seniority. In the age of technological developments, the internet is suggested as an innovative marketing tool to promote the image of the law firm to a wide range of potential clientele.

Femicide in India Essay Example | Topics and Well Written Essays - 3000 words

Femicide in India - Essay Example In the past, males were primarily responsible for hunting and then the females were supposed to cook and serve the food to the family. The setup was continuing to exist in various forms and shapes over several eras. In the modern world, females are still managing the homes while their male fellows work in different fields of life (Gupta, et al. 2003). The abovementioned scenario is very much true for the developing parts of the world because these areas have failed to incorporate human rights and values into the very fabric of the society. The outdated philosophy of man being a hunter is followed by the masses that are living in the less developed countries of the world. Additionally, it should be kept in mind that the economic pressures that were caused to prevail in developed nations due to Second World War and the Great Depression have played a significant role in the induction of female as a worker. Initially, the woman was considered ideal for subordination and followership. But , with the passage of time, females emerged as ideal leaders (Alston 2005). The scholars are of the view that being a man and woman is just a biological difference and it does not affect the ability of an individual. The propagation of gender equality has impressed the global and international companies to consider gender as a secondary issue and their main focus remains on the core competencies of the candidate. The particular candidate who has the proper experience, personality type and behaviors that are required to do the job then, the management selects him or her without giving a thought to the gender (Brown 1979). Furthermore, the economic pressures and postwar destruction seriously compromised the labor supply at that time and therefore, the males had to transfer knowledge and information to them in order to make the new breed of workers more active and effective part of the workforce. The females are getting more and more prominent in all walks of life. Their ability to be an artist, leader and an employee is matched with that of males and in some cases it exceeded the expectations and anticipations of the supervisors as well. The economic world order is changing and because of this reason, international trade activities are experiencing a boom in all parts of the world. The developed communities are becoming knowledge-based societies and the emergent economies are taking up the role of industrialized centers of the world (Taylor 2005). The trend of outsourcing is growing and the history is repeating itself once more in the Indian society where cultural and societal norms are responding to accommodate new and different economic opportunities (Mehta, et al. 2006). As mentioned earlier that India is transforming into the production center of the world and therefore, it is facing grave labor deficiency presently. The companies are empowering females in order to compensate for the labor shortage. In this way, the female is becoming increasingly powerful i n the society where she was burned with the dead body of the husband. Based on the above discussion, economic needs are far stronger and influencing than cultural norms and values. The human civilization has a tendency to change its norms and values in order to experience economic growth. The Indian nation is doing the same and the nation’

E-goverment in angola Dissertation Example | Topics and Well Written Essays - 9500 words

E-goverment in angola - Dissertation Example One aspect of change is e-governance. Though existing literature has outlined the possibility of e-governance spiraling economic lives of citizens, little has been done to unravel understanding of the prospects, challenges, and practices of e-governance in improving literacy levels, championing the values of democracy, increasing economic transactions, and improving government administrative functions. This report seeks to explore the prospects of E-governance in Angola, assess the challenges facing implementation of e-governance, and ultimately establish best practices that have effectively promoted the governance in Angola. A survey will help gather qualitative data to be analyzed using descriptive statistics. The target population will be government departments, businesses, citizens, and government employees. This study will help guide the government of Angola to determine how e-governance has and will help in service delivery, know sections of the population not reached or utiliz ing the services and promote effective inter-ministerial or departmental communication in the nation of Angola. Table of Contents Abstract 2 Table of Contents 3 1.0 Introduction 5 2.0 Literature Review 6 2.2.1Government and Governance 7 2.2.2 E-Government and E-Governance 8 2.2.3 Components of E-Government 8 2.2.4 E-governance 9 2.3 E-Government in Angola 10 2.3.1 Overview of Angola 10 2.3.2 Demography 11 2.4.3 Telecommunications Infrastructure 14 2.4.4 Human Development (Human Index in Angola) 16 2.6 Opportunity 18 2.6.1 Quality of Public Services to Citizen 18 2.6.3 Encourage Use of ICT Africa 20 2.7.1 Angola: Country Profile 21 2.7.2 Demography 22 2.7.3 Economy 22 2.7.4 Governance 24 2.7.5 Description 26 2.7.6 Specific Objectives 27 3.1 Sample size 30 1.0 Introduction This study intends to analyze the role of e-governance in fostering democracy in Africa by critically assessing its contribution on the Angolan governance and how these aspects have contributed to effective service delivery and improved the standards of living of Angolan people. It outlines how to subdue the challenges of instituting e-governance and further inform the knowledge bank of the Angolan government on the current and new challenges likely to be faced in implementation. 1.1 Research Question To what extent has e-governance influenced democracy and good governance in Africa? 1.2 Objectives: 1. Explore the prospects of e-governance in Africa. 2. Assess the challenges facing implementation of e-governance in Africa. 3. Establish best practices that have effectively promoted democracy and good governance in Africa. 2.0 Literature Review 2. 1 Introduction In 1990s, the IMF imposed structural adjustment programs meant to ease Africa’s economic hardships and act as an avenue for developing good use of public resources and promotion of accountability by governments to citizens. In order to meet the donor demands and increased pressure by citizens to have their governments perform, Afr ican countries gradually began to appreciate the use of internet, PCs, mobile phones, and other gadgets to deliver government services online. E-government is taunted as the most efficient way of streamlining public sector reforms and citizen involvement in administration and governance of public affairs. Though the process of e-governance is highly admired, there are many challenges, facing its implementation.

General Electric Report Essay Example | Topics and Well Written Essays - 3000 words

General Electric Report - Essay Example The General Electric Company also obtained the fourteenth rank of among most profitable companies globally. The General Electric Company is an American transnational conglomerate business integrated in Schenectady. The company is located in New York but has its headquarters in Fairfield, Connecticut situated in the United States. General Electric Company operates in four main areas of production and service to their customers. The areas include Technology Infrastructure, Industrial and Consumer, Capital Finance and Energy. General Electric has endeavoured into the world market hence achieving global acknowledgment for its exclusive goods and services. Â  In the year 2009, Forbes magazine graded GE as the world's biggest company. Â  Hurbert in 2007 noted that General Electric's brand is the globe's most identified brand. Â  This kind of detection has given it an aggressive advantage over other organizations due to its capacity to be a focus for more customers. The technology infras tructure incorporates the company’s business group consisting of the General Electric Company’s constituents such as transportation, healthcare and the General Electric aviation. The formulation of this unit resulted from the staggering losses experienced by the company in the year 2008. The General Electric capital finance entails the major financial services of the company that are grouped into five elements. The financial services include the General Electric money, capital aviation services, energy financial services and the capital real estate. The General Electric Capital offers commercial lending and leasing services within the company. The sectors gaining from the capital are the aviation, entertainment, communications, healthcare, consumers and media. The General Electric Energy concerns with the creation of the energy necessary for the running of the company’s activities as well as making profits from the consumers. The energy of the company is based i n Georgia and Atlanta in the United States of America. The company’s energy is categorised into Power and Water, oil and gas and the energy management. The industrial and consumer refers to the company’s businesses and their solutions to the company and the consumers. The unit targeted efficiency in customers’ services through increasing their productivity. The critical tool used by the company in this case is the employment of superb information management and the automation of the specific solutions at every instance of their application. The basic categories of the industrial solutions of the General Electric are the appliances, intelligent platforms and lighting. Statement of Financial position ASSETS 2011 2010 Cash and equivalents $ 84,501 $ 78,943 Investment securities 47,374 43,938 Current receivables 19,531 18,621 Inventories (Note 5) 13,792 11,526 Financing receivables—net 280,378 303,012 Other GECS receivables 7,561 7,571 Property, plant and equ ipment—net (Note 7) 65,739 66,212 Investment in GECS Goodwill (Note 8) 72,625 64,388 Other intangible assets—net (Note 8) 12,068 9,971 All other assets (Note 9) 111,707 94,299 Assets of businesses held for sale (Note 2) 711 36,887 Assets of discontinued operations (Note 2) 1,255 12,425 Total assets (a) $717,242 $747,793 LIABILITIES AND EQUITY 2011 2010 Short-term borrowings (Note 10) $137,611 $137,611 Accounts payable, principally trade accounts 16,400 14,656 Accounts payable,

The wizard of Oz Essay Example | Topics and Well Written Essays - 750 words

The wizard of Oz - Essay Example Particularly, the paper will analyze the scene in which the Wicked Witch, the stories main antagonist, was killed through her own machinations in the famous â€Å"I’m melting† scene. The sepia-toned setting of the Kansas prologue in the Wizard of Oz is famously contrasted with the splash of full color that the movie introduced as we enter Dorothy’s dream. The world of the dream is meant, we are supposed to believe, to represent an alternative universe. Yet director Fleming draws from the real world political and economic landscape of the late 1930s in building this supposed alternate world. Particularly, he establishes two worlds – one with a kind of goodness and innocence that, though it has its own brand of hypocrisy and silliness, is presumed superior to the second, a dark and scary world of evil that lurks about the film’s edges in the person of the Wicked Witch and the setting associated with her. As the film progresses we see that even the sce nes in which a kind of injustice can be discerned in the sleek modern City of Oz -- through, for example, the Wizard making promises he has no intention of keeping – are carried out in a golden bathing light of modernity and technological wonder. This is strongly contrasted with the Witch’s castle which, with its gothic arches and ancient, minimalist architecture seems to be inspired by old world, specifically German, influences. The suggestion is the American world is preferable to the European even in its failings. In building the mise-en-scene for the two contrasting worlds, Fleming utilized a full range of color and light in the City of Oz scenes, as well as for the march along the beautiful if sometimes difficult travel on the yellow brick road. However, in the scenes that are associated with the witch, -- such as the forest scene and castle scene – the color palette is darkened and limited. The black of the witch’s cloak is contrasted with the blue of Dorothy’s dress and bright red of the coveted shoes in many shots in these settings. The uniforms of the zombie-like soldiers that serve the witch resemble Nazi officers’ uniforms. The green-faced witch herself, in the make-up choices made, suggests a kind of sickness and moral decrepitude, contrasted against Dorothy’s fresh innocence. Nathanson (1991) contrasts the two worlds of the City of Oz and Witch’s Castle in excellent summary form. After, describing Oz as an American â€Å"future anticipated in the present† he describes the setting of the witch’s castle as follows: Technology here is primitive. Candles and torches are used instead of electric lights, spears instead of guns, and an hourglass instead of a clock. Surfaces, moreover, are coarse and unpolished. Architecturally, the Castle is a maze of twisting staircases and crooked passages. Here, then the mise-en-scene is alien. It is remote in both time and space. (p. 39) Here the s etting of the action is made to resonate with the world of the late 1930s in which the world was moving steadily to war – with the American promise of technology being questioned and challenged (potentially) by the reactionary and agrarian aggressiveness of Hitler’s Nazi Party. While such a comparison is not made explicit in the film, it is almost inescapable when looking back on the film as a piece of cultural history.

General Electric Report Essay Example | Topics and Well Written Essays - 3000 words

General Electric Report - Essay Example The General Electric Company also obtained the fourteenth rank of among most profitable companies globally. The General Electric Company is an American transnational conglomerate business integrated in Schenectady. The company is located in New York but has its headquarters in Fairfield, Connecticut situated in the United States. General Electric Company operates in four main areas of production and service to their customers. The areas include Technology Infrastructure, Industrial and Consumer, Capital Finance and Energy. General Electric has endeavoured into the world market hence achieving global acknowledgment for its exclusive goods and services. Â  In the year 2009, Forbes magazine graded GE as the world's biggest company. Â  Hurbert in 2007 noted that General Electric's brand is the globe's most identified brand. Â  This kind of detection has given it an aggressive advantage over other organizations due to its capacity to be a focus for more customers. The technology infras tructure incorporates the company’s business group consisting of the General Electric Company’s constituents such as transportation, healthcare and the General Electric aviation. The formulation of this unit resulted from the staggering losses experienced by the company in the year 2008. The General Electric capital finance entails the major financial services of the company that are grouped into five elements. The financial services include the General Electric money, capital aviation services, energy financial services and the capital real estate. The General Electric Capital offers commercial lending and leasing services within the company. The sectors gaining from the capital are the aviation, entertainment, communications, healthcare, consumers and media. The General Electric Energy concerns with the creation of the energy necessary for the running of the company’s activities as well as making profits from the consumers. The energy of the company is based i n Georgia and Atlanta in the United States of America. The company’s energy is categorised into Power and Water, oil and gas and the energy management. The industrial and consumer refers to the company’s businesses and their solutions to the company and the consumers. The unit targeted efficiency in customers’ services through increasing their productivity. The critical tool used by the company in this case is the employment of superb information management and the automation of the specific solutions at every instance of their application. The basic categories of the industrial solutions of the General Electric are the appliances, intelligent platforms and lighting. Statement of Financial position ASSETS 2011 2010 Cash and equivalents $ 84,501 $ 78,943 Investment securities 47,374 43,938 Current receivables 19,531 18,621 Inventories (Note 5) 13,792 11,526 Financing receivables—net 280,378 303,012 Other GECS receivables 7,561 7,571 Property, plant and equ ipment—net (Note 7) 65,739 66,212 Investment in GECS Goodwill (Note 8) 72,625 64,388 Other intangible assets—net (Note 8) 12,068 9,971 All other assets (Note 9) 111,707 94,299 Assets of businesses held for sale (Note 2) 711 36,887 Assets of discontinued operations (Note 2) 1,255 12,425 Total assets (a) $717,242 $747,793 LIABILITIES AND EQUITY 2011 2010 Short-term borrowings (Note 10) $137,611 $137,611 Accounts payable, principally trade accounts 16,400 14,656 Accounts payable,

Wikileaks Endangered Lives Saved by Military Censorship Essay

Wikileaks Endangered Lives Saved by Military Censorship - Essay Example This is just not the case. In fact, what is usually called military â€Å"censorship† is in the best interest of our troops, our country, our government, and our liberty. One recent example of this is the Wikileaks scandal where a large number of sensitive documents were released to the public. This release of censored material shows why censorship is actually a positive thing when it comes to military documents, as it has caused problems with military security. Furthermore, it endangered not only the lives of American troops, but of Afghan civilians and everyone involved. Wikileaks and other disasters have proved that military â€Å"censorship,† far from being dangerous, is a necessary part of keeping the country safe. In the middle of 2010 and the war in Afghanistan, a website called Wikileaks began posting classified documents from the US Government. In many cases these documents being uncensored â€Å"could put the lives of Americans and our partners at risk, and t hreaten our national security† (Jones). Although it’s debatable what intent the Wikileaks project had in fighting against what they perceived as censorship, their result was definitely harmful. As Assistant Secretary of Defense for Public Affairs Douglas B. Wilson put it, the â€Å"arrogance and naivete† of fighting against military censorship â€Å"have determined and had negative consequences for national security" (Miles).

Touch Interfaces Essay Example for Free

Touch Interfaces Essay Introduction Pointing at an object is the most basic human interaction, which is very important in human-machine interfaces. Similarly, creating gestures such as using ones hand and arm can provide information. For instance, pointing to a chair indicates asking for permission to sit down or pointing to indicate directions. The main goal of all the research done on touch interface and gesture recognition is to develop a system that can identify specific human gestures using human touch and use them to interact with Software application. Humans habitually use gesture to interact with other humans. Gestures can be used for everything such as pointing at an object for attention to conveying information about space and temporal characteristics [1]. Biologists define gesture, as the notion of gesture is to embrace all kinds of instances where an individual engages in movements whose communicative intent is paramount, manifest, and openly acknowledged [2]. Gestures that are related with speech are called gesticulation and gestures that are independent from speech are called autonomous gesture. Autonomous gestures have its own communicative language such as American Sign Language (ASL) as well as motion commands. There are many other types of gestures such as Semiotic – communicating meaning, Ergotic – manipulating objects and Epistemic – groping. There are six types of semiotic gestures and they are Symbolic (arbitrary), Deictic (pointing), Iconic (descriptive), Pantomimic (use of invisible objects), Beat (indicating flow of speech) and Cohesive (marker indicating related topics) [3]. Symbolic or Arbitrary gestures are gestures that can be learned but are not common in a culture setting and can be very useful because they can be specifically created for use of device control. An example is the set of gestures used for airport plane control. Deictic gestures are used to point at important objects and these gestures can be specific that refers to one object, in general that refers to class of object, or functions that symbolize intentions. An example is a simple hand gestures such as pointing to ones mouth when he or she is hungry. Related Technologies Today, there exist many image-based or device-based hardware techniques, which can be used as touch interface. For example, an image-based technique can detect gesture by capturing pictures of users hand motions gesture via camera. The captured image is then sent to Computer-vision software, which tracks the image and identifies the gesture. For instance, television sets that can be controlled by hand gesture instead of a remote control have been developed [4] [5] [6]. Basically, to turn the TV on, the user raises his open hand and the computer recognizes the gesture, which in return turns the TV on. Device-based techniques such as instrumented gloves, stylus and other position trackers have been developed, which recognize the movements and send the signals so that the system can understand the gesture. For example, Dexterous Handmaster [7] developed in 1987, initially used to control robot hand, which was very accurate but was not suitable for rapid movement. Power Glove [7] developed in 1989 by Mattel, which was resistive ink sensors for finger position, plus ultrasonic tracking and the Space Glove [7] developed in 1991, which was a plastic rings around fingers. Other gloves such as 5DT Data GloveTM [7], SuperGlove [7], Pinch Gloves [7] and CyberGlove [7]. However, the latest in computer technology is the G-Speak Gestural Technology System [8], a glove which is faster and easier to use compared to mouse and keyboard and using it one can move anything anywhere on the screen. At present, there exist many products, which are closely related with the hypothesis of this thesis. For example, the GyroPoint is a product of Gyration, Inc. in Saratoga, CA [9] [10]. The device can operate in two different modes. First, it can operate as a regular mouse and second, it can operate in the air (3D). Another example, the Bluewand, [11] which is a small pen-like device used to control Bluetooth enabled devices by hand-movements. Basically, a 6-axis accelerometer and gyroscope system detects devices full direction and movement in space. Bluewand can be used with verity of applications such as remote control for TV-set, cell-phone, MP3-player, etc. Overview of the Technology (Touch Interfaces) The ability to touch a computer screen and manipulate objects or control is a advance way of communication between human and computers and due to this advancement many types of touch system is developed such as point-of-sale systems, to information kiosks, to electronic whiteboards, iPod, iPhone etc. However, these systems have different ways of implementation in different applications. For example, using a desktop display for touch input as well as pen input, recognizing finger for touch on the screen. Other ways of implementation are such as Gesture recognition is a process through which a computer can recognize human gesture. Such interaction can make interface with computer more accessible and expressive for both the physically impaired and for young children who might find this type of interaction more natural. Gestures can be used in applications such as word processing, hand sign language, games, entertainment and educational approaches. There are other forms of gesture recognition than hand gestures. For example, finger pointing a way to select or move objects around, face tracking, eye motion and lip reading, etc. Technology that implements gestures has the ability to change the way humans interact with computers by eliminating input devices such as joysticks, mice and keyboards. Lots of conventional whole-hand input devices creates interface using non-contact methods or through some physical medium and such interfaces often needs contact of the hands and fingers with a hard, firm surface. As displays get larger, multi-user interaction is important as well as the ability to recognize two or more simultaneous inputs. As a result, wall-size touch displays became important for users as it enables to work with computer application and in the future human-body sized interfaces will become a natural way of interaction with the multiple users. Other related system is â€Å"A Camera-Based Touch Interface for Pervasive Displays† [13] developed by Gerald D. Morrison. Basically, the system contains smart camera in the corners of a 17-foot-wide wall display to determine the location of an object in front of, or in contact with, the display. The main object the user’s finger and the collected image are processed in such a way that it can recognize various attributes of the object’s, such as location relative to the display in three dimensional space. The information sent back to computer which generates the display, enabling touch control. Advantages of such system Many companies have established research centers all over the world to conduct research in developing new technologies. They emphasizes on managing its process in order to deliver product that are cheap and fast maintaining a good Information Management strategy. Manipulation of information using different applications and technologies became a potential information overload for many similar companies. Hence taking advantage of the new advance technologies to manage and maintain the information overload. Other advantages are such as having to interact with software application more closely compared t traditional ways of interactions. The term software was used in the early days of the software engineering field. It was used to describe how the rapid increase in computational power and the complexity of problems which now could be tackled. It refers to the difficulty of writing correct, understandable and variable computer programs. Having touch interface will help developer to interact with developing tools to developed advance software application. Today in the 21st century software is every where imaginable, when you check out at the grocery store, using a credit card, driving your car or listening to music in your new MP3 player just to name a few. Software development has undergone a change from its early days, the awareness of the software crisis has forced engineers to address the problems by various processes and methodologies and the industry are realizing that changing to more efficient ways of communicate with computers lead to better products with higher quality and reduced costs. However, there is always a problem that the tools and techniques invented today will need time to mature, to be introduced into industry.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The security implications of the system will be strong in order to assure safety for both the user and the system using finer print recognition. The main security issue such as data access must be implemented in such a way that the privilege given to the user is controlled and manipulated. Controlling the web-browsing habit such as browsing illegal or unwanted web sites need also to be controlled, hence providing user access to email, web sites using password and encryptions is essential. Keeping off the malicious users from accessing valuable company information and other external information that can be used against the company stuff and the company authorities needs to be taken under consideration. Sending emails and other attachments must be allowed according to hierarchy of access permissions. Other issues that need to be taken under consideration are such as the network password and security tokens needs to be changed constantly and most off all securing the connection to local devices that are connected to the network such as print servers and touch screen connected printers. Routers and switches should be organize and installed as securely as possible and web based configuration should be disabled as well as network access to the devices should be limited to the Grenada networks. To have a perfectly feasible operation and conduct the most proper ethical business functions is the first priority for most companies and businesses. The most critical issue related with IT is IT security where the objective is to take effective measures to decrease the threats exist today in IT related business such as e-commerce. Today, most companies prefer electronic information over traditional ways of storing and manipulation of information. Data are stored in huge database and process using different front-end software’s form anywhere in the world. IT security is made up of three main categories and they are Confidentiality, Integrity and Availability. Confidentiality is when company or an organization has sensitive information and does not want to disclose such information to anyone outside the company. Integrity is when companies want to update the system to adapt to future needs. As for availability, it is when a business implements a system it needs to make sure the system is up and running when needed. Threats such as customer’s information can be disclosed which can affect the credibility of any company; company’s information can be hacked by illegally, etc. There are many ways to improve the correct securities such as protecting data and information using different sophisticated firewall software, understanding threats and its impact in order to be protected forms it, calculating risk and deciding how to eradicate such risk. There are two basic ways to improve security and they are Bottom Up and Top Down. Bottom Up approach is not that precise but in order to implement such approach it is advisable to properly understand company policies, network topology and companies operating procedure. Top Down approach is methodical and more precise compared to Bottom Up approach but is slow and expensive. The main advantages of the touch interface are that it is centralized where it can access its information from using human touch. Therefore, if there are any security issues it can be dealt with using by tracking the finger-print. It is also flexible and scalable enough for new technologies to integrate with the system. Many flexible system and architecture can be designed so that it can be interoperable making all components work together in a synchronized fashion. This system can be used to backup critical information which is vital for both the system and the end-user. Conclusion As the information age advanced the need for computers became a daily part of human life. Computers have emerged from early abacus, papyrus and ENIAC to today’s main frame computer and super computers that can manipulate huge amount of information across the globe. The use of Touch screen was discovered by military in order to share information and after the first dial up connection; the use of touch screen became popular amongst local public. Today, computers are the most essential part of human life starting from basic calculators to storing and manipulating of terabits of information. Use of Touch screen is mostly possible if one uses computers or other devices such as mobiles. Need for speedy information has become an important issue in today’s business. Using such devices Touch screen caused a revolution in our society. Peoples shopping style is also changing because of Touch screen. Selling products over the touch screen is cheap, fast and easy for both the company and the customer. Hence issues such as privacy and ethics are most important and needs to be concentrated on by the governments and education institute. Many of the ethical issues involve privacy. For example, privacy concerning e-mail uses by the employees, head office of a company and individuals. System such as malleable surface interface [12] can be used in applications that require physically touching the screen and its objects performed by the human hands or finger, such as sculpting and massage. Even though, many touch technology systems are suitable for small displays such as iPod, iPhone, the system can be also used in big screen such TV, or directly interacting with the pc monitor. This way of communication is very attractive because they are more versatile than other input devices as well as can be made inexpensively. While touch sensing is very common but having multi user interaction has become more essential. Having to interact with a system with more than one finger at a time useful for larger interaction scenarios such as interactive walls and tabletops. Many researchers experimenting with a wide variety of application scenarios and communication modalities that utilize multi-touch input. It is a rich area for research, and has potential for advances in efficiency, usability, and intuitiveness of the future UI designed. Today there exist mobiles with touch screen and stroke interfaces as compared to those with button, thumbwheel, trackballs, and stylus etc interfaces. The traditional ways of interaction for example using buttons, and cognitively arbitrated by the need to roll a wheel to scroll the cursor focus kept us distance with the technology invented. Hence, to touch something would be to minimize the distance between human and the computer. Using gesture similar to Nintendo Wii, is a breakthrough in advancement of GUI. Other devices such as LG Prada, HTC phone and Apple iPhone help us to use our fingers to feel the system rather just using the system. The touch system is already been used in wireless devices successfully. Wireless communications offer organizations and users many benefits such as portability, flexibility and lower installation costs. Wireless technologies cover a broad range of capabilities toward different uses and needs. Wireless local area network (WLAN) devices, for instance, allow users to move their laptops from place to place within their offices and homes without the need for wires and without losing network connectivity. However, risks are natural in any wireless technology. The most significant source of risks in wireless networks is that the technology’s underlying communications medium such as the airwave, is open to intruders. Having touch screen developers and interact and develop application using advance GUI’s. Today, touch screen technology is used everywhere to cut down cost as well as speed up the development process by keeping the quality of the application insured. Touch screen based development helps to build software applications by connecting multiple components together which are produced independently. In order for this communication to take place we must have an interface between the components in such a way that is helps to develop the overall application as well as implementing it in the future applications. However, it is the compatibility between connected component interfaces that determines the success of the implementation of the components. To be precise, an interface is made of number of operations which can be manipulated by the user. The operations play a vast role in implementing the interface and use of the interface by the client or the user. Today, Internet is a good way of doing business and use of internet is constantly increasing. Improving the GUI and converting to touch screen will become very important in the future for the use of World Wide Web because it helps to communicate globally and deliver products to customers who can not purchase the products. It also helps to increases advertising and by providing one to one marketing. E-commerce is a very easy way of gathering information form its customers or potential customers. One of the biggest advantages of using the internet is its efficient ways of reducing warehousing and inventory. A Company needs a network that provides fast and efficient way to manipulate its information. Compared to its traditional manual filing system accessing, touch screen will provide information with speed, accuracy, and accessibility. A sophisticated design of the system will allow access from anywhere in the world which helps to manipulate and send information through the world. Hence, the touch screen is reliable in assuring speed, data reliability, cheap and strong security. However, it is extremely reliable and main important thing is that no extra input device is needed. Touch screen gives fast and superior performance which is sufficient for file sharing, gaming, and high-speed access. As for security, touch screen will have software application that recognizes finger print. Traditional GUI and access can be three or four times expensive compared to touch screen. A both traditional ways and touch screen can be a good option for any company depending on the difficulty of accessing the information the company. However, touch screen is easier to install, more reliable and mobility is excellent where as traditional is more difficult to install with limited mobility. Reference [1].  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   A Brief Overview of Gesture Recognition by Charles Cohen. http://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/COHEN/gesture_overview.html ; Accessed 7th, Nov, 2007 [2]   Ã‚  Ã‚  Ã‚  Ã‚   Jean-Luc Nespoulous, Paul Perron, and Andre Roch Lecours. The Biological Foundations of Gestures: Motor and Semiotic Aspects. Lawrence Erlbaum Associates, Hillsdale, MJ, 1986. http://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/COHEN/gesture_overview.html; Accessed 7th, Nov, 2007 [3].   Ã‚  Ã‚  Ã‚   GESTURE BASED INTERACTION; Steven Damer; http://www-users.itlabs.umn.edu/classes/Fall-2004/csci8980-1/slides/gesture.pdf; Accessed 7th, Nov, 2007 [4]   Ã‚  Ã‚  Ã‚  Ã‚   Computer Vision for Computer Interaction SIGGRAPH Computer Graphics magazine, November 1999 W. T. Freeman, P. A. Beardsley, H. Kage, K. Tanaka, K. Kyuma, C. D. Weissman. Also available as MERL-TR99-36. [5]  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Computer Vision for Interactive Computer Graphics; IEEE Computer Graphics and Applications, Vol. 18, No. 3, May-June 1998; W. T. Freeman, D. B. Anderson, P. A. Beardsley, C. N. Dodge, M. Roth, C. D. Weissman, W. S. Yerazunis, H. Kage, K. Kyuma, Y. Miyake, and K. Tanaka. Also available as MERL-TR99-02. [6]  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Computer Vision for Computer Games In 2nd International Conference on Automatic Face and Gesture Recognition, Killington, VT, USA. IEEE. W. T. Freeman, K. Tanaka, J. Ohta, K. Kyuma . Also available as MERL-TR96-35. [7]  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Gesture Based Interaction; Steven Damer; http://www-users.itlabs.umn.edu/classes/Fall-2004/csci8980-1/slides/gesture.pdf; Accessed 7th, Nov, 2007 [8]  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Gesture Glove Not Science Fiction;   LOS ANGLEES, Aug. 23, 2005; http://www.cbsnews.com/stories/2005/08/23/eveningnews/main792311.shtml; Accessed 7th, Nov, 2007 [9]  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   An Evaluation of Two Input Devices for Remote Pointing; Scott MacKenzie and Shaidah Jusoh; http://www.yorku.ca/mack/ehci2001.pdf ; Accessed 7th, Nov, 2007 [10]  Ã‚  Ã‚  Ã‚   Gyration, Inc., Saratoga, California. http://www.gyration.com/ ; Accessed 7th, Nov, 2007 [11]  Ã‚  Ã‚  Ã‚  Ã‚   Bluewand. A versatile remote control and pointing device; Thomas Fuhrmann , Markus Klein, and Manuel Odendahl; http://i30www.ira.uka.de/research/documents/p2p/2003/fuhrmann03bluewand-KiVS.pdf ; Accessed 7th, Nov, 2007 [12]  Ã‚  Ã‚  Ã‚  Ã‚   Florian Vogt, Timothy Chen, Reynald Hoskinson, Sidney Fels; A Malleable Surface Touch Interface; Human Communication Technologies Laboratory; The University of British Columbia; http://hct.ece.ubc.ca/publications/pdf/vogt-chen-hoskinsin-fels-SIGGRAPH2004.pdf; Accessed 7th, Nov, 2007 [13]  Ã‚  Ã‚  Ã‚  Ã‚   Gerald D. Morrison; A Camera-Based Touch Interface for Pervasive Displays; SMART Technologies Inc., 1207 – 11 Ave. SW, Suite 300, Calgary, AB, Canada T3C 0M5; http://ubicomp.algoritmi.uminho.pt/perdisplay/docs/Morrison-Camera%20Touch_SV_Rev1.pdf; Accessed 7th, Nov, 2007;

Assessment of Hydraulic Conductivity of Soil

Assessment of Hydraulic Conductivity of Soil Hydraulic Conductivity Soil Chapter 1 Introduction Hydraulic conductivity or permeability of a soil is one important soil properties used in geotechnical engineering. It can be seen from the difficulty in measuring accurate and reliable values of hydraulic conductivity. Hydraulic conductivity of soil is basically the capacity of water to let water to pass through the pores or voids in the soil. There are many methods developed in order to measure the hydraulic conductivity of soil; both laboratory and in-situ field methods. Some of the common laboratory methods are the constant-head test and falling head test. On the other hand, the common in-situ field methods are pumping well test, borehole tests (e.g. slug test, variable head test), infiltrometer tests and using porous probes (BAT permeameter). All these in-situ field test methods were used to measure the hydraulic conductivity of subsoil for both saturated and unsaturated media. One other in-situ field measurement method that has been introduced is the Two-Stage Borehole (TSB) test, also known as the Boutwell permeameter test. This testing method is commonly used to test a low hydraulic conductivity soil such as compacted clay liner used in landfill barrier system or covers used at waste disposal facilities, for canal and reservoir liners, for seepage blankets, and for amended soil liners. The advantage of using this method is that it can be used to measure both the vertical and horizontal hydraulic conductivity values of soil, kv and kh respectively. One other advantages of using this method is that it can be used to measure the rate of infiltration of water or other fluid into a large mass of soil which can represent the tested site. However, the application of the TSB/Boutwell permeameter test for natural soil or other soils having a higher permeability value has been limited. This report will discuss the theory behind the TSB/Boutwell permeameter test and the application of this method on natural soil. The methodology of this test will also be included in this report. In addition to the standard TSB setup, this report will also discuss the modification made to the standard TSB test which can be easily and quickly installed in shallow boreholes for subsequent testing. The methodology and results from the modified setup will also be included. The results from both the standard and modified setup will then be compared. Objectives The objectives of this project is summarised into four stages. In the first stage, the objective is to measure the hydraulic conductivity of the soil using the standard TSB/Boutwell permeameter setup. The second stage involves the modification of the standard TSB/Boutwell Permeameter setup. The aim is to obtain a simple installation setup which can be easily and quickly installed in shallow boreholes for subsequent testing. In the third stage, the objective is to test the modified TSB/Boutwell Permeameter test in the field. This is done by carrying out a series of tests in varied subsurface media at the assigned site location. The results from both the standard and modified TSB/Boutwell Permeameter test will be compared. The last stage of the project consists of particle size analysis of the soil obtained from site. The results from the two setups will again be compared to the hydraulic conductivity values obtained from the derivation of the Particle Size Distribution curves. The tasks that are done in this project include: The review of TSB/Boutwell Permeameter methodology Developing the modify TSB/Boutwell Permeameter Completion of field tests using the TSB/Boutwell Permeameter Collection of soil samples and subsequent particle size analysis Chapter 2 Literature Review 2.1 Soil Water Soils are consists of separate solid particles. The pore spaces between the solid particles are all interconnected which mean that water is free to flow through these interconnected pore spaces (Whitlow, 2001). The water will flow from a higher pore pressure point to a lower pore pressure point. The pressure of the pore water is measure relatively to the atmospheric pressure. The level in which the pressure is zero (i.e. atmospheric) is defined as the water table (Craig, 2004). The soil above the water table is assumed to be unsaturated and the soil below the water table is assumed to be fully saturated. The level of water table changes in relation with climate conditions and can also be affected by any constructional operations (Craig, 2004). It is usual to express a pressure as a pressure head or head which is measured in metres of water when considering water flow problems. According to Bernoullis equation, the total head at a point in flowing water can be given by the sum of three head components; pressure head (u/ÃŽ ³w), velocity head (v2/2g) and elevation head (Z). This relationship is illustrated in the equation below: (Equation 1) where; h = total head u = pressure v = velocity g = acceleration due to gravity ÃŽ ³w = unit weight of water Z = elevation head However, since the seepage velocities in the soil are so small due to the high resistance to flow offered by the granular structure of the soil, the velocity head is often omitted from the equation (Whitlow, 2001). The total head at any point is then can be adequately represented by: (Equation 2) In saturated conditions, the one-dimensional water flow in soil is governed by the Darcys Law, which states that the velocity of the groundwater flow is proportional to the hydraulic gradient: (Equation 3) where; v = velocity of groundwater flow = flow/area (q/A) k = coefficient of permeability or hydraulic conductivity (constant) i = hydraulic gradient = head/length (h/L) The empirical validity of Darcys Law depends heavily on the hydraulic conductivity, k, which must be carefully determined so that it can represent the soil mass (Azizi, 2000). The different practical methods that can be used to measure the hydraulic conductivity will be discussed in Section 2.3. It is important to study the flow of water through porous media in soil mechanics. This is necessary for the estimation of underground seepage under various conditions, for investigation of problems involving the pumping of water for underground constructions, and for making stability analyses of retaining structures that are subjected to seepage forces (Das, 2006). Hydraulic Conductivity (Coefficient of Permeability) Hydraulic conductivity, k, of a soil is the capacity of the soil to allow water to pass through it. The value of hydraulic conductivity is often used to measure the resistance of a soil to water flow. Hydraulic conductivity has units of length divided by time. The most common unit used of measurement is meter per second (m/s). Although hydraulic conductivity has the same unit as those to describe velocity, it is not a measure of velocity (Coduto, 1999). Importance of Hydraulic Conductivity Hydraulic conductivity is a very important parameter in geotechnical engineering or in determining the widespread of contamination. This can be seen in the difficulties in measuring it. This is because hydraulic conductivity can varies from one point in a soil to another, even with small changes in the soil characteristics. It is also, as mentioned in the previous section, influenced by the viscosity and unit weight of the fluid flowing through the soil. Hydraulic conductivity is also dependent to the direction of flow which means that the vertical hydraulic conductivity would not be the same as the horizontal hydraulic conductivity. This condition of the soil is said to be anisotropic. Studies that have been made indicate that the value of vertical hydraulic conductivity (Kv) of a soil is usually higher than the horizontal hydraulic conductivity (Kh) in one or two order of magnitude (Chen, 2000). Some applications in which information on hydraulic conductivity is very important are in modelling the groundwater flow and transportation of contaminants in the soil. Hydraulic conductivity data of a soil is also important for designing drainage of an area and in the construction of earth dam and levee. In addition, it is very important in tackling most of the geotechnical problems such as seepage losses, settlement calculations, and stability analyses (Odong, 2007). Factors Affecting Hydraulic Conductivity The hydraulic conductivity of a soil depends on many factors. The main factor that affecting the value of hydraulic conductivity is the average size of the pores between particles in the soil, which in turn is related to the distribution of particle sizes, particle shape and roughness, pore continuity, and soil structure (Craig,2004). In general; the bigger the average size of the pores, the higher the value of hydraulic conductivity is. The value of hydraulic conductivity of a soil that has a presence of small percentages of fines will be significantly lower than the same soil without fines. In the other hand, the presence of fissures in clay will result in a much higher value of hydraulic conductivity compared to that of unfissured clay (Craig, 2004). The range of the hydraulic conductivity value is very large. Table 1 below illustrates the range of hydraulic conductivity which differs from one soil type to another which is mainly due to the different average size of the pores between the soil particles. Table 1 Range of hydraulic conductivity values (m/s) with different soil type (Whitlow, 2001) 102 101 1 10-1 Clean gravels Very good drainage 10-2 10-3 10-4 Clean sands Gravel-sand mixtures 10-5 10-6 Very fine sands Silts and silty sands Fissured and weathered clays Good drainage Poor drainage 10-7 10-8 10-9 Clay silts (>20% clay) Unfissured clays Practically impervious The hydraulic conductivity is also dependent to viscosity and density of water in which both are affected by temperature. It is therefore conclude that the value of hydraulic conductivity will then be affected by changes in temperature. Theoretically, it can be shown that for laminar flow and saturated soil condition the relationship between temperature and hydraulic conductivity: (Equation 4) Where; ÃŽ ³w= unit weight of water ÃŽ · = viscosity of water K = absolute coefficient (units m2). This value is dependent on the characteristic of the soil skeleton. Since most of the laboratory graduations were standardised at 20C, the value of hydraulic conductivity at this temperature is taken as 100% (Craig, 2004). Other value of hydraulic conductivity at 10C and 0C are 77% and 56% respectively (Craig, 2004). Hydraulic Conductivity Tests Most of the tests for measuring hydraulic conductivity measured one average value of hydraulic conductivity. However, some tests measured both the vertical and horizontal hydraulic conductivity values to obtained more accurate estimation. There are numbers of experiments and test that can be done to measure the hydraulic conductivity of a soil. These tests to measure the hydraulic conductivity can be done both in the laboratory and in the field. The following sections will briefly discussed the most common laboratory and in-situ tests practiced today to measure the hydraulic conductivity of a soil. Although with all the various tests developed to measured the hydraulic conductivity, there are uncertainties arise on how the soils that being tested represent the whole soil condition at the site of interest. It is therefore a good practice to perform different tests and comparing the results obtained. Laboratory Permeability Tests One problem with laboratory tests is that the samples collected do not adequately represent the detailed conditions of the soil, e.g. fissures, joints or other characteristics in the site of interest. Even with carefully conducted tests and good sampling techniques, it is impossible to obtain a very accurate result. The results typically have a precision of about 50% or more (Coduto, 1999). It is therefore important to take this into consideration if any construction activities or contamination remediation operations to be perform at the site of interest. Constant Head Permeability Test The constant head test is used to measure the hydraulic conductivity of more permeable soils such as gravels and sands which have a hydraulic conductivity value of 10-4 m/s (Whitlow, 2001). The equipments used for this test is called a constant head permeameter. A schematic illustration of this equipment is shown in Figure 2.1. The constant head permeameter was developed base on the basic idea of Darcys Law (Equation 3). The soil sample is contained in a cylinder of cross-sectional area A. Continuous water supply is let to flow from a tank to the sample to maintain a constant head. The water that flow through the sample is collected in a collection jar or container and the discharge through the sample is measured by calculating the volume of the water in the collection container over a period of time t. h Figure 2.1 Schematic diagram of Constant Head Permeameter (www.geology.sdsu.edu) The hydraulic conductivity, k of the tested soil is then calculated by: From equation 3: (Equation 5) Where; Q = the discharge through the sample (m3/s) L = the length of the sample (m) A = cross-section of the sample (m2) h = hydraulic head (m) The above diagram shows a simple setup of the constant-head permeameter. Other setup is also available which make use a pair of standpipes to measure the pore pressure and potential at two points. This is illustrated in Figure 2.2 below. Although both the setups are different, it makes used of the same concepts; Darcys Law. Figure 2.2 Alternative setup of Constant Head Permeameter (Whitlow, 2001) Falling Head Permeability Test The falling head test is used to measure the hydraulic conductivity of less permeable soils such as fine sands, silt and clay. The water flow resistance in these types of soil are very high which unable to measure accurate measurements of hydraulic conductivity if used with constant head permeameter. Undisturbed samples are required to perform laboratory test to measure the hydraulic conductivity of a soil. However, a small degree of disturbance of the sample is accepted as it is very hard to obtain a perfect undisturbed sample. An undisturbed sample can be obtained usually using a U100 sample tube or a core-cutter tube (Whitlow, 2001).The schematic illustration of the falling head test setup is shown in Figure 2.3. Figure 2.3 Laboratory setup of falling head test (Whitlow, 2001) The sample is place in a cylinder container with a wire mesh and gravel filter at both end of the cylinder. The base of the cylinder is left to stand in a water reservoir fitted with a constant level overflow. At the other end, which is the top of the cylinder, it is connected to a glass standpipe of known diameter (Whitlow, 2001). These standpipes are then filled with de-aired water and it is allow to flow through the soil sample. The height of the water in the standpipe is measured at several time intervals. The test is then repeated using standpipes of different diameters. It is a good practice to take note of the initial and final unit weight and water content of the sample to get additional information about the properties of the sample (Whitlow, 2001). The hydraulic conductivity of the sample is then calculated from the results obtained from the tests. The Darcys Law concept is still used in determining the hydraulic conductivity. The derivation of the hydraulic conductivity for the falling head test is done as follow (Whitlow, 2001). Deriving from Equation 3: With reference to Figure 2.3, if the level of the water in the standpipe fall dh in a time of dt the flow, q will be and the hydraulic gradient, i Therefore; (Equation 6) Where; a = cross-sectional area of the standpipe A = cross-sectional area of the sample When equation 6 is rearranged and integrated, the final equation to calculate the hydraulic conductivity is given as (Equation 7) Particle Size Analysis Particle size analysis is commonly used to classify the physical properties of the soil being tested. This testing method is used for both soil science and engineering purposes (Keller and Gee, 2006). In context of engineering purposes, it is commonly used to define the particle size distributions of the soil. The data obtained from the particle size distributions can then be used to estimate the pore-size classes needed in calculating the hydraulic properties of the soil such as hydraulic conductivity (Keller and Gee, 2006). There are various methods of measuring particle size analysis. Traditional methods include sieving, hydrometer and pipette. Other new techniques are also been developed; one example is laser-diffraction techniques (Eshel et al, 2004). However, particle size analysis is dependent on the technique used for defining the particle size distribution. It is therefore a common practice to do more than one method to define the particle size distribution (Keller and Gee, 2006). The results from all the different methods can then be compared to obtain more representative result. For the traditional particle size analysis methods, two separate procedures are used in order to obtain wider range of particles sizes (Head, 1980). The two procedures are sieving and sedimentation procedures (hydrometer or pipette method). Sieving is used to categorise large particle such as gravel and coarse sand. The particles can be separated into different size ranges using a series of standard sieves. For the finer particles such as silt and clay, sedimentation procedure is used (Head, 1980). Once the particle size distribution is defined from the particle size analysis, the hydraulic conductivity of the tested soil can then be estimated using a number of established empirical equations. However, the applicability of the above equations depends on the type of soil that is being tested. The following paragraphs summarised several empirical equations from previous studies (Odong, 2007). Hazens equation: (Equation 8) Kozeny-Carmans equation: (Equation 9) Breyers equation: (Equation 10) Slitchers equation: (Equation 11) Where; g = acceleration due to gravity v = kinematic viscosity n = porosity of the soil d10 = grain size in which 10% the sample is finer than The estimation of the hydraulic conductivity from these equations required information on the kinematic viscosity v and porosity n of the soil. The kinematic viscosity can be calculated by: (Equation 12) Where; = dynamic viscosity ÃŽ ¡ = density of water The porosity n can be calculated using the empirical relationship below: (Equation 13) Where U is the coefficient of grain uniformity and is given by: (Equation 14) The values of d60and d10 can be obtained from the particle size distribution. d60and d10 represent the grain size for which 60% and 10% of the sample respectively is finer than. In-situ Field Permeability Tests Due to the problems associated with reliability and laboratory tests, as mention in Section 2.3.1, field methods of measuring the hydraulic conductivity should be used to obtain more accurate and reliable measurements. In the field test, the soil disturbances is kept to a minimum level and they usually involves the testing of larger, more representative samples. Although, in term of cost and time, field measurement method is more expensive, it will as well provide more reliable measurement of hydraulic conductivity when dealing with a wide range of soil macro-structural characteristics. Other more economic option of field measurement can also be done. Such example is by performing borehole test, provided the pumping observation sequences are carefully planned and controlled (Whitlow, 2001). Well Pumping Tests This method is more suitable if used to measure hydraulic conductivity in homogenous coarse soil strata (Craig, 2004). The procedure involves the measurement of water that is being pumped out of a well at a constant rate, then observing the effect of these pumping activities to the drawdown of the groundwater level at other wells. The diameter of the well is normally at least 300mm and penetrates to the bottom of the stratum under test (Craig, 2004). The pumping rate and the groundwater levels in two or more monitoring wells are then recorded. The analysis of the results depends whether the aquifer is confined or unconfined. Well pumping test in a confined aquifer In confined aquifer the permeable stratum is squeezed in between two impermeable layers. This is illustrated in Figure 2.4 below. To perform the test, the pumping rate must not be too high to reduce the level in the pumping well below the top of the aquifer. The interface between the top aquifer and the overlying impermeable stratum therefore forms the top stream line (Whitlow, 2001). Figure 2.4 Pumping test in confined aquifer (Azizi, 2000) Figure 2.4 illustrates the arrangement of the pumping well and two other monitoring wells. Two assumptions were made at this point; the piezometric surface is above the upper surface of the aquifer and the hydraulic gradient is constant at a given radius (Whitlow, 2001). In steady state condition, the hydraulic gradient through an elemental cylinder with radius r from the well centres estimated as follow: where; dr = thickness h = height The area in which the water flow, A: where; D = the thickness of the aquifer Substituting the area A into the Darcys Law (Equation 4) will give; Hence: And therefore the hydraulic conductivity is: (Equation 15) In the case that the piezometric level is above ground level, where the water level inside the well inserted into the confined aquifer rises above the ground level, this scenario is called Artesian conditions (Azizi, 2000). This is illustrated in Figure 2.5. Figure 2.5 Artesian conditions (Azizi, 2000) Well pumping test in unconfined aquifer An unconfined aquifer is a free-draining surface layer that allows water to flow through the surface. The permeable stratum is not overlain by an impermeable layer. The piezometric surface is therefore in the same level of the water table. This is illustrated in Figure 2.6 below. The surface layer permeability is very high, thus allowing the water table to fluctuate up and down easily. Figure 2.6 Pumping test in an unconfined aquifer (Whitlow, 2001) Under steady state pumping conditions, the hydraulic gradient i at a given radius is assumed to be constant in a homogenous media. Homogenous unit is where the properties at any location are the same. For instance, sandstone has grain size distribution, porosity and thickness variation within a very small limit (Fetter, 2001). With reference to the arrangement of pumping well and two monitoring wells in Figure 2.6 above, the hydraulic conductivity can be determine by: Deriving from Equation 3: where; Hydraulic gradient i is And area through which the water flow, Then, Thus, hydraulic conductivity for an unconfined aquifer (after integrating the above equation) is (Equation 16) Borehole Permeameter Tests There are many borehole tests developed to determine the hydraulic conductivity of a soil. The most common in-situ borehole tests are as follow: Slug test Two-stage borehole test/ Boutwell Permeameter Variable head test In-situ constant head test Slug test is one of the cheapest in-situ field methods to determine the hydraulic conductivity of a soil. The procedure of this test involves the rapid adding or removing a slug or water into a monitoring well. The slug can be of anything that can displace the volume of the water in the well, e.g. water, plastic tubing capped at both ends, and other material of known volume and can fit into the monitoring well. The rate of rise and fall of the groundwater level is then observed until it reaches an equilibrium state. In a variable head test, a slug is introduced into the monitoring well by either adding in a measured volume of water into the well or other materials mentioned earlier. The rate of water level fall is then measured in time. This is called falling head test. The water can also be removed out from the well by using a bailer or a pump. The rate of water level rise is then measured with time. This is called a rising head test. Depending on the properties of the aquifer and the soil, and the size of the slug used the water can either returns to its original water level before the test quickly or very slowly. For instance, if the porosity of the soil is high then the water level will returns very quickly to its original water level before the test is done. There is also the constant head test. In this test the water level or head is maintained throughout the test at a given level. This is done by adjusting and measuring the flow rate of the water at intervals from start to the end of the test (Whitlow, 2001). The constant head test is said to give more accurate results, provided the water pressure is controlled so that it would not cause fracturing or other disturbance to the soil (Whitlow, 2001). There are several assumptions made for this test: The soil is homogenous, isotropic, uniformly soaked Infinite boundaries Soil does not swell when wetted The expressions use to calculate the hydraulic conductivity for the above tests depend on whether the stratum is unconfined or unconfined, the position of the bottom of the casing within the stratum and details of the drainage face in the soil (Craig, 2004). The horizontal hydraulic conductivity is tend to be measured if the soil is anisotropic with respect to permeability and if the borehole extends below the bottom of the casing. On the other hand, the vertical hydraulic conductivity is often measured if the casing penetrates below soil level in the bottom of the borehole (Craig, 2004). The following expressions are all recommended in BS 5930 to calculate the hydraulic conductivity (Whitlow, 2001). For variable head test: (Equation 17) Or, (Equation 18) For constant head test: Hvorslevs time lag analysis (Equation 19) Gibsons root-time method (Equation 20) where; A20% clay) Unfissured clays Practically impervious The hydraulic conductivity is also dependent to viscosity and density of water in which both are affected by temperature. It is therefore conclude that the value of hydraulic conductivity will then be affected by changes in temperature. Theoretically, it can be shown that for laminar flow and saturated soil condition the relationship between temperature and hydraulic conductivity: (Equation 4) Where; ÃŽ ³w= unit weight of water ÃŽ · = viscosity of water K = absolute coefficient (units m2). This value is dependent on the characteristic of the soil skeleton. Since most of the laboratory graduations were standardised at 20C, the value of hydraulic conductivity at this temperature is taken as 100% (Craig, 2004). Other value of hydraulic conductivity at 10C and 0C are 77% and 56% respectively (Craig, 2004). Hydraulic Conductivity Tests Most of the tests for measuring hydraulic conductivity measured one average value of hydraulic conductivity. However, some tests measured both the vertical and horizontal hydraulic conductivity values to obtained more accurate estimation. There are numbers of experiments and test that can be done to measure the hydraulic conductivity of a soil. These tests to measure the hydraulic conductivity can be done both in the laboratory and in the field. The following sections will briefly discussed the most common laboratory and in-situ tests practiced today to measure the hydraulic conductivity of a soil. Although with all the various tests developed to measured the hydraulic conductivity, there are uncertainties arise on how the soils that being tested represent the whole soil condition at the site of interest. It is therefore a good practice to perform different tests and comparing the results obtained. Laboratory Permeability Tests One problem with laboratory tests is that the samples collected do not adequately represent the detailed conditions of the soil, e.g. fissures, joints or other characteristics in the site of interest. Even with carefully conducted tests and good sampling techniques, it is impossible to obtain a very accurate result. The results typically have a precision of about 50% or more (Coduto, 1999). It is therefore important to take this into consideration if any construction activities or contamination remediation operations to be perform at the site of interest. Constant Head Permeability Test The constant head test is used to measure the hydraulic conductivity of more permeable soils such as gravels and sands which have a hydraulic conductivity value of 10-4 m/s (Whitlow, 2001). The equipments used for this test is called a constant head permeameter. A schematic illustration of this equipment is shown in Figure 2.1. The constant head permeameter was developed base on the basic idea of Darcys Law (Equation 3). The soil sample is contained in a cylinder of cross-sectional area A. Continuous water supply is let to flow from a tank to the sample to maintain a constant head. The water that flow through the sample is collected in a collection jar or container and the discharge through the sample is measured by calculating the volume of the water in the collection container over a period of time t. h Figure 2.1 Schematic diagram of Constant Head Permeameter (www.geology.sdsu.edu) The hydraulic conductivity, k of the tested soil is then calculated by: From equation 3: (Equation 5) Where; Q = the discharge through the sample (m3/s) L = the length of the sample (m) A = cross-section of the sample (m2) h = hydraulic head (m) The above diagram shows a simple setup of the constant-head permeameter. Other setup is also available which make use a pair of standpipes to measure the pore pressure and potential at two points. This is illustrated in Figure 2.2 below. Although both the setups are different, it makes used of the same concepts; Darcys Law. Figure 2.2 Alternative setup of Constant Head Permeameter (Whitlow, 2001) Falling Head Permeability Test The falling head test is used to measure the hydraulic conductivity of less permeable soils such as fine sands, silt and clay. The water flow resistance in these types of soil are very high which unable to measure accurate measurements of hydraulic conductivity if used with constant head permeameter. Undisturbed samples are required to perform laboratory test to measure the hydraulic conductivity of a soil. However, a small degree of disturbance of the sample is accepted as it is very hard to obtain a perfect undisturbed sample. An undisturbed sample can be obtained usually using a U100 sample tube or a core-cutter tube (Whitlow, 2001).The schematic illustration of the falling head test setup is shown in Figure 2.3. Figure 2.3 Laboratory setup of falling head test (Whitlow, 2001) The sample is place in a cylinder container with a wire mesh and gravel filter at both end of the cylinder. The base of the cylinder is left to stand in a water reservoir fitted with a constant level overflow. At the other end, which is the top of the cylinder, it is connected to a glass standpipe of known diameter (Whitlow, 2001). These standpipes are then filled with de-aired water and it is allow to flow through the soil sample. The height of the water in the standpipe is measured at several time intervals. The test is then repeated using standpipes of different diameters. It is a good practice to take note of the initial and final unit weight and water content of the sample to get additional information about the properties of the sample (Whitlow, 2001). The hydraulic conductivity of the sample is then calculated from the results obtained from the tests. The Darcys Law concept is still used in determining the hydraulic conductivity. The derivation of the hydraulic conductivity for the falling head test is done as follow (Whitlow, 2001). Deriving from Equation 3: With reference to Figure 2.3, if the level of the water in the standpipe fall dh in a time of dt the flow, q will be and the hydraulic gradient, i Therefore; (Equation 6) Where; a = cross-sectional area of the standpipe A = cross-sectional area of the sample When equation 6 is rearranged and integrated, the final equation to calculate the hydraulic conductivity is given as (Equation 7) Particle Size Analysis Particle size analysis is commonly used to classify the physical properties of the soil being tested. This testing method is used for both soil science and engineering purposes (Keller and Gee, 2006). In context of engineering purposes, it is commonly used to define the particle size distributions of the soil. The data obtained from the particle size distributions can then be used to estimate the pore-size classes needed in calculating the hydraulic properties of the soil such as hydraulic conductivity (Keller and Gee, 2006). There are various methods of measuring particle size analysis. Traditional methods include sieving, hydrometer and pipette. Other new techniques are also been developed; one example is laser-diffraction techniques (Eshel et al, 2004). However, particle size analysis is dependent on the technique used for defining the particle size distribution. It is therefore a common practice to do more than one method to define the particle size distribution (Keller and Gee, 2006). The results from all the different methods can then be compared to obtain more representative result. For the traditional particle size analysis methods, two separate procedures are used in order to obtain wider range of particles sizes (Head, 1980). The two procedures are sieving and sedimentation procedures (hydrometer or pipette method). Sieving is used to categorise large particle such as gravel and coarse sand. The particles can be separated into different size ranges using a series of standard sieves. For the finer particles such as silt and clay, sedimentation procedure is used (Head, 1980). Once the particle size distribution is defined from the particle size analysis, the hydraulic conductivity of the tested soil can then be estimated using a number of established empirical equations. However, the applicability of the above equations depends on the type of soil that is being tested. The following paragraphs summarised several empirical equations from previous studies (Odong, 2007). Hazens equation: (Equation 8) Kozeny-Carmans equation: (Equation 9) Breyers equation: (Equation 10) Slitchers equation: (Equation 11) Where; g = acceleration due to gravity v = kinematic viscosity n = porosity of the soil d10 = grain size in which 10% the sample is finer than The estimation of the hydraulic conductivity from these equations required information on the kinematic viscosity v and porosity n of the soil. The kinematic viscosity can be calculated by: (Equation 12) Where; = dynamic viscosity ÃŽ ¡ = density of water The porosity n can be calculated using the empirical relationship below: (Equation 13) Where U is the coefficient of grain uniformity and is given by: (Equation 14) The values of d60and d10 can be obtained from the particle size distribution. d60and d10 represent the grain size for which 60% and 10% of the sample respectively is finer than. In-situ Field Permeability Tests Due to the problems associated with reliability and laboratory tests, as mention in Section 2.3.1, field methods of measuring the hydraulic conductivity should be used to obtain more accurate and reliable measurements. In the field test, the soil disturbances is kept to a minimum level and they usually involves the testing of larger, more representative samples. Although, in term of cost and time, field measurement method is more expensive, it will as well provide more reliable measurement of hydraulic conductivity when dealing with a wide range of soil macro-structural characteristics. Other more economic option of field measurement can also be done. Such example is by performing borehole test, provided the pumping observation sequences are carefully planned and controlled (Whitlow, 2001). Well Pumping Tests This method is more suitable if used to measure hydraulic conductivity in homogenous coarse soil strata (Craig, 2004). The procedure involves the measurement of water that is being pumped out of a well at a constant rate, then observing the effect of these pumping activities to the drawdown of the groundwater level at other wells. The diameter of the well is normally at least 300mm and penetrates to the bottom of the stratum under test (Craig, 2004). The pumping rate and the groundwater levels in two or more monitoring wells are then recorded. The analysis of the results depends whether the aquifer is confined or unconfined. Well pumping test in a confined aquifer In confined aquifer the permeable stratum is squeezed in between two impermeable layers. This is illustrated in Figure 2.4 below. To perform the test, the pumping rate must not be too high to reduce the level in the pumping well below the top of the aquifer. The interface between the top aquifer and the overlying impermeable stratum therefore forms the top stream line (Whitlow, 2001). Figure 2.4 Pumping test in confined aquifer (Azizi, 2000) Figure 2.4 illustrates the arrangement of the pumping well and two other monitoring wells. Two assumptions were made at this point; the piezometric surface is above the upper surface of the aquifer and the hydraulic gradient is constant at a given radius (Whitlow, 2001). In steady state condition, the hydraulic gradient through an elemental cylinder with radius r from the well centres estimated as follow: where; dr = thickness h = height The area in which the water flow, A: where; D = the thickness of the aquifer Substituting the area A into the Darcys Law (Equation 4) will give; Hence: And therefore the hydraulic conductivity is: (Equation 15) In the case that the piezometric level is above ground level, where the water level inside the well inserted into the confined aquifer rises above the ground level, this scenario is called Artesian conditions (Azizi, 2000). This is illustrated in Figure 2.5. Figure 2.5 Artesian conditions (Azizi, 2000) Well pumping test in unconfined aquifer An unconfined aquifer is a free-draining surface layer that allows water to flow through the surface. The permeable stratum is not overlain by an impermeable layer. The piezometric surface is therefore in the same level of the water table. This is illustrated in Figure 2.6 below. The surface layer permeability is very high, thus allowing the water table to fluctuate up and down easily. Figure 2.6 Pumping test in an unconfined aquifer (Whitlow, 2001) Under steady state pumping conditions, the hydraulic gradient i at a given radius is assumed to be constant in a homogenous media. Homogenous unit is where the properties at any location are the same. For instance, sandstone has grain size distribution, porosity and thickness variation within a very small limit (Fetter, 2001). With reference to the arrangement of pumping well and two monitoring wells in Figure 2.6 above, the hydraulic conductivity can be determine by: Deriving from Equation 3: where; Hydraulic gradient i is And area through which the water flow, Then, Thus, hydraulic conductivity for an unconfined aquifer (after integrating the above equation) is (Equation 16) Borehole Permeameter Tests There are many borehole tests developed to determine the hydraulic conductivity of a soil. The most common in-situ borehole tests are as follow: Slug test Two-stage borehole test/ Boutwell Permeameter Variable head test In-situ constant head test Slug test is one of the cheapest in-situ field methods to determine the hydraulic conductivity of a soil. The procedure of this test involves the rapid adding or removing a slug or water into a monitoring well. The slug can be of anything that can displace the volume of the water in the well, e.g. water, plastic tubing capped at both ends, and other material of known volume and can fit into the monitoring well. The rate of rise and fall of the groundwater level is then observed until it reaches an equilibrium state. In a variable head test, a slug is introduced into the monitoring well by either adding in a measured volume of water into the well or other materials mentioned earlier. The rate of water level fall is then measured in time. This is called falling head test. The water can also be removed out from the well by using a bailer or a pump. The rate of water level rise is then measured with time. This is called a rising head test. Depending on the properties of the aquifer and the soil, and the size of the slug used the water can either returns to its original water level before the test quickly or very slowly. For instance, if the porosity of the soil is high then the water level will returns very quickly to its original water level before the test is done. There is also the constant head test. In this test the water level or head is maintained throughout the test at a given level. This is done by adjusting and measuring the flow rate of the water at intervals from start to the end of the test (Whitlow, 2001). The constant head test is said to give more accurate results, provided the water pressure is controlled so that it would not cause fracturing or other disturbance to the soil (Whitlow, 2001). There are several assumptions made for this test: The soil is homogenous, isotropic, uniformly soaked Infinite boundaries Soil does not swell when wetted The expressions use to calculate the hydraulic conductivity for the above tests depend on whether the stratum is unconfined or unconfined, the position of the bottom of the casing within the stratum and details of the drainage face in the soil (Craig, 2004). The horizontal hydraulic conductivity is tend to be measured if the soil is anisotropic with respect to permeability and if the borehole extends below the bottom of the casing. On the other hand, the vertical hydraulic conductivity is often measured if the casing penetrates below soil level in the bottom of the borehole (Craig, 2004). The following expressions are all recommended in BS 5930 to calculate the hydraulic conductivity (Whitlow, 2001). For variable head test: (Equation 17) Or, (Equation 18) For constant head test: Hvorslevs time lag analysis (Equation 19) Gibsons root-time method (Equation 20) where; A