Wednesday, October 9, 2019
Analyzing Case Study Research Paper Example | Topics and Well Written Essays - 1000 words
Analyzing Case Study - Research Paper Example The analysis will take into consideration the actions and decisions of the energy industry regulators to promote competition in the industry. United Kingdom Energy Markets As demonstrated by the actions of British Gas and the Scottish and Southern Energy, the energy market in U.K is characterized by collusion and cartels. These oligopolistic market structures enable the six larger firms in this industry to regulate the market by determining the prices and supply of energy products. An oligopoly is a market structure, which is controlled by few producers, and each of the producers has control over the market. The extent to which an industry or a market is dominated by a few leading firms is determined by the concentration ratio. It is an industry where the level of market concentration is high. In most circumstances, an oligopoly exists when there are five large firms, and the demand or sales of their products account for 60 percent of the total market. There is no specified theory th at explains how firms determine the output and price under the conditions of oligopoly. If there are price wars in the industry the oligopolistic firms will produce and price their products as perfect competitive industry, at other times they will behave like a pure monopoly. The following are the characteristics of oligopoly market structure; these characteristics are also displayed by the UK energy market. First, product branding; this feature is seen when every firm in the market is selling differentiated (branded) products. For example, British Gas, EDF, E.ON, Scottish Power, Npower, and SSE firms among other small firms in the energy industry sell differentiated products in the UK energy markets. Second, entry barriers; considerable entry barriers into the industry market prevents other firms to enter the market thus enabling dominant firms to maintain supernormal profits. Various small firms may operate on the edge of an oligopolistic market, but these firms are not large enou gh to have a considerable effect on the market output and prices. In July 2011, the British Gas announced an increase in electricity and gas prices by 16 percent and 18 percent respectively just eight months after it increased its prices. British Gas managing director defended the increase in prices saying that the market rates for energy has increased in the global energy market, which increased the wholesale costs of the firm by 30 percent for the last one year (King 2011). While reacting to this increase in energy prices energy minister, Chris Huhne demanded change in the UK electricity market. Energy secretary Chris Huhne, held a meeting with small energy suppliers, with an objective of finding ways of breaking the dominance of the large six electricity and gas companies and help in keeping energy prices down. The plan of the minister was to abolish the entry barriers in the energy market to allow competition between small and large firms in the energy industry (King 2011). The actions of Chris clearly show that there are entry barriers in the UK energy market. Third, interdependent decision making; in oligopolistic market firms take into consideration the possible responses of their competitors to any change in output, price or forms of non-price competition. Increase of gas and electricity prices by British Gas came one month after
Tuesday, October 8, 2019
Vegetarian is healthy Research Paper Example | Topics and Well Written Essays - 1250 words
Vegetarian is healthy - Research Paper Example What are the advantages of becoming a vegetarian? What are the health risks associated with being a vegetarian? An Overview of a Vegetarian lifestyle In the world of today, the diet of vegetarians has become common all over the world, with a number of people throughout the world preferring to become vegetarians. Most people are of the argument that embracing a vegetarian diet can be regarded as essential for a healthy life. Organizations that agitate for the rights of animals discourage people from eating meat, chicken or fish. The diet of vegetarians mainly contains fruits, vegetables, as well as whole grains. Vegetarians argue that what they take can be considered as the best combination of a healthy diet. However, there are counter arguments that seem to discredit vegetarian meals, arguing that these meals are not complete. It has been argued that, despite the nutritional benefits of a vegetarian diet, the meals taken by vegetarians cannot fulfill all the bodyââ¬â¢s nutritional requirements (Maurer 1-10). Categories of Vegetarians There are various categories of vegetarians, which include semi-vegetarian, lacto-vegetarian, pesci-vegetarian, and ovo-vegetarian. A semi-vegetarian refers to a vegetarian who eats meat, but only meat from chicken and fish. A lacto-vegetarian encompasses a vegetarian who may eat dairy products; however, he or she does not eat eggs. Most of these vegetarians are found in the Hindu religion who takes dairy products, but for religious reasons avoid eggs; a pesci-vegetarian eats fish only. The category of ovo-vegetarians includes people who eat eggs but tend to avoid dairy products, as well as meat (Brown 1-144). Body Arguments for being Vegetarians There are several benefits that accrue when a person becomes a vegetarian as compared to a person who eats meat, poultry, and fish. These benefits consist of the advantages of becoming a vegetarian. One of the arguments that support a vegetarian lifestyle emanates from the fact that a v egetarian diet is rich in fiber, Vitamin C and folate. The diet of vegetarians includes nuts, grains, seeds, fruits, cereals, vegetables and beans. Components such as fruits and vegetables provide minerals and vitamins that play an essential role for enhancing a healthy body. Seeds and beans act as reliable sources of proteins. Vegetables have phytochemicals, which play an essential role in preventing a person from contracting some chronic illnesses. Moreover, green leafy vegetables can be regarded as a credible source of antioxidants. Beneficial enzymes, natural sugars, as well as trace elements, can be derived from fruits and vegetables that vegetarians eat (Brown 1-144). Another benefit that a person can derive when he, or she is a vegetarian is that they take few chemicals by engaging in a vegetarian lifestyle. Those people who take animal products eat as much as the chemicals that the animals eat. Every bite of either pork hotdog or beef contains several pesticides that cause c ancer. Beef and dairy products are also known to be the primary source of contamination that results from nuclear radiation. Animal fat contains industrial pollutants, pesticides, and sex hormones that have effects of estrogen and can cause breast cancer. Vegetarians are free from these contaminants that can accumulate in human fat and reach higher levels than food, thus causing breast cancer. Thus, a vegetarian life
Sunday, October 6, 2019
The Chrysamthemums Essay Example | Topics and Well Written Essays - 250 words
The Chrysamthemums - Essay Example Flower and wire fence create a picture how her tender emotions are imprisoned. Through such enclosures, she watches the activities that are taking place in the society. Elisa has no conflict with her husband; everything apparently seems to go on well. Her dissatisfaction with her life has nothing to do with the attitudes of her husband and his disposition towards her. The story critically examines her psychology. The images of seasons, weather, plants and animalsââ¬âall work as natures agents to provide support to the happiness of her life. When a bright and energetic woman has to fall in line to follow the routine procedures of married life, an unseen compulsion blocks her career goals and she turns cynical. Elisa makes desperate efforts to come to terms to find real happiness in life, but in vain. She thinks that she is going round and round in the same circle with no possibility of finding an opening. A powerful woman feels powerless for no apparent reasons, except that she is married. Steinbeck further writes, ââ¬Å"She took off a glove and put her strong fingers down into the forest of new green chrysanthemum sprouts that were growing around the old roots. She spread the leaves and looked down among the close-growing stems. No aphids were there, no sow bugs or snails or cutworms. Her terrier fingers destroyed such pests before they could get started.â⬠(p.375) This description indicates something profound about Elisas personality. She is cut out to accomplish the great, but she has to find satisfaction in activities like trimming the plants and dealing with the chrysanthemums. Being unable to find the perfect disciplines in her choices in life, she practices to adjust and carry on with the available discipline! In fine, the story "The Chrysanthemums" is steeped in symbolism to highlight the plight of an ambitious
Saturday, October 5, 2019
Introduction to the law of property Essay Example | Topics and Well Written Essays - 1000 words - 1
Introduction to the law of property - Essay Example However, on the facts, none of that exists and the legal title, on Bellaââ¬â¢s death, is transferred to Dominic who is the sole legal owner of 41 Evergreen Terrace. As a result, the only interest Nigel can establish in the land in order to bar Dominic from selling the property and to continue occupying it is necessarily equitable. Dominic is currently the owner at law as well as in equity, owing to the lack of any direct conveyance to another or the declaration of a trust. Nigel, in order to claim an equitable ownership of Evergreen will have to rely on a number of recent authorities that allow a third party to claim an interest in the property of another (Pettitt v Pettitt (1970), Lloyds Bank v Rosset (1989), Stack v Dowden (2007)), and argue a constructive trust in his favor. However, since Nigel contributed to the purchase price, he can argue a resulting trust in his favor as well, according to the principals set in Curley v Parkes. It is apparent from that case that any contribution at the time of acquisition of the property will result in the creation of a purchase money resulting trust in favor of the contributor, entitling him to an equitable ownership in the property (Dyer v Dyer (1788), Laskar v Laskar (2008). However, this law is only operable if the money provided by Nigel was not meant as a gift or loan, which may as well be the case here since it was a father daughter deal. However, the facts are silent on the matter. Moreover, the House of Lords in Stack v Dowden suggested that the resulting trust mechanism to establish an equitable interest in property should be sidelined in favor of constructive trusts, since they can relate to a lot of other factors as well instead of just being concerned with the purchase money, especially in relation to family affairs. Hence, those will be considered below. Nigel has been made a promise to after he moves in by Dominic. The words used are
Friday, October 4, 2019
2007-2009 Financial Crisis Essay Example | Topics and Well Written Essays - 250 words
2007-2009 Financial Crisis - Essay Example As many companies have struggled to cope with this crisis, large numbers of people have been deprived of their jobs. It is seen that hundreds of people working in different fields lost their works during the crisis, and it resulted in poor economic growth. Shi and Singh (2011) pointed out that, ââ¬Å"During the 2007-2009 recession, the unemployment rate in the United States topped 10 %, the highest it had been in the 26 yearsâ⬠(p. 545). So, the crisis has made unemployment worse for many people as it has become more difficult to find a new job. To be specific, many companies have been reluctant to hire any new people. The financial crisis caused to decline in international trade, and finally led the nation towards unemployment. At the same time, the financial crisis was worldwide, with European banks and markets as severely affected as those in the United States. The crisis checked the growth of total economies, and international trade declined and collapsed. Kaar (2009) made it clear that, ââ¬Å"As at the present time the world can be regarded as a closed economy with highly integrated global markets, the unanimity in pessimism, the widespread fall in consumer confidence and the new credit restrictions soon had devastating effects on numerous countries real economies and forced thousands of healthy businesses around the globe and across all industries into financial troublesâ⬠(p. 27). So, one can see that the economic crisis resulted in global stagnation. Besides, the crisis affected the smooth functioning of the banking system in the U.S. It questioned the stability of many banks. For in stance, financial institutions like New Century Financial and Ameriquest faced insolvency. MacEwan and Miller(2011) stated that, ââ¬Å"On September 15, Legman Brothers, in existence since 1850, declared bankruptcyâ⬠(p. 110). In short, most of the financial institutions were forced to undergo crisis and suffered trillions of dollars in losses. Summing
Thursday, October 3, 2019
Admission to the Masterââ¬â¢s Program in Physical Anthropology Essay Example for Free
Admission to the Masterââ¬â¢s Program in Physical Anthropology Essay I had always been enamored with science; accordingly I did my major in Chemistry and Archaeology from the University of Virginia. In this process I attended two archeological digs. One of these was of six weeks duration at a Native American Site that dated back to the seventeenth century. The other one was conducted at a Historical Site that pertained to the nineteenth century, during one of the semesters in college. During the course of my studies in archeology, I performed an isotopic analysis on hair samples obtained from ancient Egyptian mummies, in order to discover the diet that they used to consume. Subsequent, to graduating with a degree in chemistry and archaeology, I discontinued my studies in order to take stock of my life and also to foray into the field of penmanship by writing a novel. Afterwards, I examined the various graduate programs that I could join in order to continue my education. My interest in science actuated me to pursue a program in patent law in the law school. I did extremely well at law school, but I was not enamored by the study of law or what I saw of legal practice. In my opinion it seemed to be a profession that was motivated solely by personal gain and avarice and was least concerned with the advancement of society.à After the successful completion of the first year of this program, my professors and lawyers persuaded me to continue with it as it would become more interesting.à This assurance caused me to persevere with legal studies. See more:à The 3 Types of Satire Essay Nevertheless, the excitement generated by the acquisition of knowledge was never experienced by me. In addition, I never felt curious about discovering something new in this field of study. This was a novel experience, because I had been elated and thrilled by the process of acquiring knowledge as an undergraduate science student.à However, the time expended in acquiring a law degree was not an utter waste of time and effort. I became adept at analyzing and arguing in a legal manner. Furthermore, I acquired knowledge regarding the historical foundation of our legal system, and I grasped the nuances of patent law.à Thus, I decided to court my original and true love, which is science. Accordingly, I scouted around and subjected the various graduate programs for which I was eligible. My search, which was quite elaborate, disclosed that physical anthropology was ideally suited to my needs. Anthropology is derived from the Greek anthropos or human and logia or study. In other words anthropology constitutes the stud of humankind right from the time that man first appeared on this planet. Each and every aspect of humans is studied in this field of study and the focus is on a holistic approach to mankind. This is a fascinating study and it has four branches, namely cultural, linguistic, archaeological and biological anthropology. My predilection is towards biological or physical anthropology, which studies the biological origins, evolutionary development and genetic diversity of humans. An attempt is also made in this branch of study to comprehend human nature, the brainââ¬â¢s evolution and the nervous system (What is Anthropology? , 2006). My lifeââ¬â¢s ambition is to successfully complete the master program in physical anthropology and subsequently, obtain a PhD in this field of study. I am extremely interested in primatology or the study of primates, palaeoanthropology or the study of fossil hominids and genetics. At present I am involved with genetic research on mollusks at the Chicago Academy of Sciences. References à What is Anthropology? . (2006). Retrieved November 8, 2007, from American Anthropological Association: http://www.aaanet.org/anthbroc.htm
Study On Use Of Pile Foundation Engineering Essay
Study On Use Of Pile Foundation Engineering Essay Piles and pile foundations have been in use since prehistoric times. Pile is commonly described as a columnar element of a building foundation. Its function is to transfer the load from a superstructure to the hard layer in the soil, or on to the rocks. The objective of this project is to identify piles and its uses in the construction industry, based on its types and suitability. This report is based on the three main types of piles, which are large displacement piles, small displacement piles and replacement piles. Figure 1. Pile Construction This report also contains research materials done by several authors have published various journals on the aforementioned topic, and numerous engineering books on pile, pile engineering, soil types, etc have been referred to assist this report. Many journals were consulted during the inception of this research. Topics like Efficiency of Pile groups installed in cohensionless soil using artificial neural networks, Experimental study on pile-end post-grouting piles for super large bridge pile foundations, etc were consulted. From these journals, it has been concluded an Artificial Intelligence application can be made to predict the efficiency of the pile. Based on the results, a pile cap can be created, or even grouting works can be performed to improve the load bearing of the structure. The commonest function of piles is to transfer a load that cannot be adequately supported at shallow depths to a depth where adequate support becomes available, also against uplift forces which cause cracks and other damages on superstructure. A bearing pile is described as a pile which can pass through weak material, whilst its tip get across a narrow distance, which in turn leads to a layer of improved bearing capacity. When piles are installed onto a layer with minimal ability to support, and the bearing capacity is being carried by friction which is acting on the sides of the pile, they are called friction piles. Many times, the load-carrying capacity of piles results from a combination of point resistance and skin friction. The load taken by a single pile can be determined by a static load test. The allowable load is obtained by applying a factor of safety to the failure load. Types of Piles Piles are of various types. These piles are classified based on the scope of construction and soil type. Figure 3. Common Driven Pile Types Concrete Piles Precast concrete piles can be either reinforced concrete piles or prestressed concrete piles. Concrete is adaptable for a wide range of pile types. It can be used in precast form in driven piles, or as insertion units in bore piles. Dense well-compacted good- quality concrete can withstand fairly hard driving and it is resistant to attack by aggressive substances in the soil, or in seawater or ground water. However, concrete is precast piles is liable to damage (possibly unseen) in hard driving conditions. Weak, honeycombed concrete in cast-in-situ piles is liable to disintegration when aggressive substances are precast in soils or in ground water. Cast In Place Concrete Piles Closed-ended hollow tubular sections of reinforced concrete or steel which are first driven into the ground and then filled with in-situ concrete. Cast-in-place concrete piles with their shell driven with mandrel are typically 50 to 80 ft (15 to 24 m) long and can specifically be designed for a wide range of loads. Typical loads that these piles can carry are 50 to 120 kips (222 to 534 kN) provided the maximum stress in concrete, is not more than 33% of 28-day strength. Figure 4. Cast-in-Situ Concrete Piles The main disadvantages are that these piles are difficult to splice after concreting, their thin shells can be damaged during driving, and redriving is not recommended. Not the most economical solution, limited span length and requires formwork support. Generally, stress in steel should not exceed 0.35 x yield strength of steel. Figure 5. Cast-in-Situ Concrete Piles The advantages are tht they have low initial cost, and tapered sections can provide higher-bearing resistance in granular stratum. These piles are best suited as medium-load friction piles in granular soils. Absolute minimum depth, no deck joints and aesthetic for small stream crossings. Precast Concrete Piles Manufacturing of pre-cast concrete piles are done within the range of 250mm 450mm. Mostly, the maximum section length can go up to 20m. There are various shapes of pile sections (eg. H-shaped, triangular-shaped, hexagonal-shaped, etc). Figure 6. Precast Reinforced Concrete Pile The construction of pre-cast concrete piles are done either in-situ or factory. Production and construction process widely affects the quality of the pile. A pile shoe should be fixed to the pile, in case the soil deposits contain a lot of boulders. This protects the pile while performing hard driving. For prestressed sections the maximum stresses should not exceed (0.33Ãâ ââ¬â¢c 0.27 pe); where pe = effective prestress stress on the section. The main disadvantages of these piles are that they are difficult to handle without damage unless prestressed. They have a high initial cost, and prestressed piles are difficult to splice. It is also difficult to manufacture, subject to longitudinal and transverse cracking, not appropriate for curved or flared structures, complicated for skews. The advantages of these pile types include high load capacities, corrosion resistance, and resistance to hard driving. Absolute minimum depth of precast bridge for short and intermediate spans. Expedites stage construction. Drilled Shafts Drilled shafts are also known as caissons or piers or bored piles. This is often known to be a cost effective solution which is practiced worldwide. This is a widely used type of deep-foundation. Drilled Shafts are widely used in the construction of bridges and large buildings. This technique is used in construction areas where large loads along with lateral resistance are key factors. Figure 7.1. Drilled Shaft The main advantages are that it is economical, it could minimize pile need for pile cap, slightly less noise and reduced vibrations, adapts easily to varying site conditions and has high axial and lateral loading capacity. The main disadvantages are that it is extremely sensitive to construction procedures, not ideal for contaminated sites, and lack of qualified inspectors. Figure 7.2. Drilled Shaft A Drilled Pile is made of concrete or grout and cast or poured, in a plastic state, into a drilled hole in the earth. Augercast, Drilled Shafts, Drilled Cast-in-situ and, their variations are all forms of drilled piles. Completed drilled piles cannot be easily inspected after installation and can be difficult to install in very soft or loose soils, wet, and marine conditions. A Drilled Pile removes soil from the ground and the resulting round hole is filled with concrete or grout. Steel Piles These are more expensive then timber or concrete but this disadvantage may be outweighed by the ease of handling of steel piles, by their ability to withstand hard driving, by their resilience and strength in bending, and their capability to carry heavy loads. Steel piles can be driven in very long lengths and cause little ground displacement. They are liable to corrosion above the soil line and in disturbed ground, and they require cathodic protection of a tong life is desired in marine structures. Long steel piles of slender section may suffer damage by buckling if they deviate from their true alignment during driving. Figure 8. Steel Piles Steel piles are strong, lightweight to handle, and capable ofcarrying heavy loads to deeper bearing stratum. They can be extended to any length since splicing is relatively easy, and these can also be readily cut to any required length. This makes steel piles suitable for areas where the depth of bearing strata are variable. Various types of steel piles in common use include pipe piles, H-section piles, box section piles, and tapered and fluted tubes. Pipe piles and H-section piles are the most commonly used steel piles in engineering practice. Steel pipe piles can either be driven open ended or closed ended. Open-ended piles will experience less driving resistance and can be drilled through obstructions such as boulders and bedrock. The piles are generally economical in the range of 40 to 80 ft (12 to 24 m) and can carry loads as high as about 250 kips (1115 kN). Pipe piles are most suited where overburden is soft clays, silts, and loose-to-medium dense sand and is underlain by dense-bearing granular material. H-Piles A form of Steel pile is known as H-Pile. These are wide-flanged sections made of steel. The biggest advantage of this pile is that the displacement of soil becomes very less, when compared against other soil displacement methods practiced in the world. The H-pile falls under small displacement category. Figure 9. H-Piles Timber piles cannot be driven through hard ground. Steel H-piles are essentially end-bearing piles. Due to limited perimeter area, H-piles cannot generate much frictional resistance. Corrosion is a major problem for steel H-piles. The corrosion is controlled by adding copper into steel. H-piles are easily spliced. They are ideal for highly variable soil conditions. H-piles can bend under very hard ground conditions. This is known as dog legging, and the pile installation supervisor needs to make sure that the piles are not out of plumb. H-piles can get plugged during the driving process. If the H-pile is plugged, end bearing may increase due to larger area. On the other hand, skin frictionmay become smaller due to smaller wall area. When H-piles are driven, both analyses should be done (unplugged and plugged) and the lower value should be used for design. Unplugged: Low end bearing, high skin friction. Plugged: Low skin friction, high end bearing. Advantages are that H-pile is available in various lengths and sizes easy to splice high capacity low soil displacement many penetrate larger obstructions with driving shoes. The disadvantages are that it is vulnerable to corrosion, hence not recommended as friction piles in granular soils may force the h-pile to bend on the weaker axis, during the pile-driving process. Due to this, there is a high chance of curvature, which may result when the piles are driven into a larger depth. Cylindrical Cylindrical piles have a high axial compressive strength for high bearing capacities; they have high moments of inertia and therefore can serve well as both a column and a foundation pile under high vertical and lateral loads. Figure 10. Cylinder Piles Cylinder piles are often used in nearshore applications where smaller foundation piles would require cofferdam construction and other costly measures. Drilled shafts have similar load bearing properties and capabilities, however, they are generally more costly than piles installed by impact driving. Timber Piles Untreated timber piles may be used for temporary construction, revetments, fenders and similar work; and in permanent construction where the cutoff elevation of the pile is below the permanent ground water table and where the piles are not exposed to marine borers. They are also sometimes used for trestle construction, although treated piles are preferred. Timber piles are difficult to extend, hard to anchor into the footing to resist uplift, and subject to damage if not driven carefully. Timber piles also have a maximum allowable bearing capacity of 45 Tons, whereas most structure piles are designed for at least 70 Tons. These piles are mostly installed by driving and are best suited as friction piles in granular material. Figure 11. Timber Piles The main advantages of timber piles are that they have low initial cost, are easy to handle, and resist decay when they are permanently submerged. The main disadvantages are that it is tough to splice, are vulnerable to damage in hard driving, and are susceptible to decay unless treated. Treatment becomes necessary when these piles are intermittently submerged. Composite Piles Materials may be used in combination in piles and the most common example is the use of steel and concrete. This may be by using driven steel casings of various types filled with a structural core of concrete, or a steel pile protected externally by concrete casing; the latter is normally only possible for exposed lengths of piles such as would be encountered in a jetty structure. There are, however, forms of steel pile, which have grout pipes throughout their length, which are used for forming a protective outer casing after driving. Figure 12. Composite Piles The maximum stresses in timber, steel and concrete should not exceed the values specified above for various materials. The main disadvantage of these piles is that it is difficult to attain good joint between two materials. The main advantage is that considerable length can be provided at comparatively low cost. High capacity may be possible depending on materials. use of piles in construction There are two types of piles used for construction: Displacement Piles Non-Displacement Piles DisplacemeNt Pile The type of pile, which is rammed into the ground, which does not remove the soil, but displaces the soil downwards and sidewise. This type of pile foundation is called displacement pile. Figure 13. Displacement Piles This method piles displace soil during their installation, such as driving, jacking, or vibration, into the ground. Examples of these types of piles are timber, precast concrete, prestressed concrete, close-ended steel pipe, and fluted and tapered steel tube piles. The advantages of displacement piles are: Material forming pile can be inspected for quality. Soundness before driving. Not liable to squeezing or necking. Construction operation not affected by ground water. Projection above ground level advantageous to marine structures. Can be driven in the very long lengths. The disadvantages of displacement piles are: May break during driving, necessitation replacement pile. Unseen damages may occurring thus decreasing the carrying capacity. Noise pollution may be caused during hammering. Vibration caused during the hammering process may pose a threat to nearby structures. Non-DisplacemeNt Pile These Piles do not displace soil during their installation. These piles are formed by first removing the soil by boring and then placing prefabricated or cast-in-place pile into the hole from which an equal volume of soil was removed. Their placement causes little or no change in lateral ground stress, and, consequently, such piles develop less shaft friction than displacement piles of the same size and shape. Piling operation is done by such methods, as augering (drilling, rotary boring) or by grabbing (percussion boring). Most common types of no displacement piles are bored and cast-in-place concrete piles. The advantages of non displacement piles are: Material forming pile is not governed by handling or driving stresses. Can be installed in very long lengths. No ground heaves. Can be installed in conditions of low headroom. Figure 14. Non Displacement Piles The disadvantages of non displacement piles are: Concreting in water-bearing soils require special techniques. Inspection of concrete cannot be done after installation. Cannot be extended above ground level without special adoption. LITERATURE REVIEW Description of Journals This section contains the description paragraph for the 5 technical journals which has been chosen to support the main topic of research. Adel M. Hanna, George Morcous, and Mary Helmy (2004) Efficiency of Pile Groups Installed in Cohensionless Soil Using Artificial Neural Networks. Adel M.Hanna, George Morcous and Mary Helmy evaluated the efficiency of pile groups installed in cohension-less soil subjected to axial loading. The authors feel that a resistance to the column load may result in a major difference between the total capacity of the individual piles and the group piles. This could lead to destruction of the building. The authors have developed an ANN (Artificial Neural Network) model to assist the research. They have found that the ANN model is nearly 80% accurate to the predicted value. The predictions are very accurate, even with low tolerance values. They have also made an ANN model which can be easily updated when new data are obtained from laboratory and field tests. Kevin J.Bentley and M.Hesham El Naggar (2000). Numerical Analysis of Kinematic Response of Single Piles Kevin and Hesham have done a research on single piles, after anticipating the catastrophic losses in terms of human life and economic assets due to the earthquakes. They wanted to develop a model which evaluates the effects of ground motion on piles. Their aim was to develop a finite element model that can accurately model the kinematic soil-structure interaction of piles, accounting for non linear behavior of soil, discontinuity at the pile soil interface, energy dissipation and wave propagation. They found that the effect of the response of piles in elastic soil was slightly amplified in terms of accelerations and Fourier amplitudes. The authors have taken a good amount of information from previous researches made. They have found that the previous studies had its own drawbacks, which were concluded that interaction effects on kinematic loading are not significant at low frequencies but are significant for pile head loading. The authors used finite element program, ANSYS to analyze the full 3D transient method. They have found that the deflections obtained in the study were slightly greater than those from other tests. The authors concluded that the effect of soil layer overlaying the bedrock was to amplify the bedrock motion, which results in a higher free-field motion for the soil parameters used in the analysis. Increased Fourier amplitudes at the predominant frequency was an effect of soil plasticity. It slightly decreased the maximum acceleration amplitudes. Jinoh Won and Fred H. Kulhawy (2009) Reduction of Pile Head Displacement for Restrained Head Single Pile. The authors conducted a study on the effect of pile head fixity on the displacement of laterally loaded pile groups using analytical methods. It was found that the soil parameters have a major influence on the reduction factor, while the pile property influence is relatively minor. The rationale behind the problem is described as most pile foundations have pile cap that reduces the lateral displacement because of restraining effect on the pile heads. The authors learned that the previous researches which were done were for small-scale tests only. The authors have performed numerous tests, from which they found that there is a variation of reduction factor with soil properties for the drained cohensionless model. The authors have done a quantitative analysis to investigate the effect of pile head restraint on the displacement using an analytical method. Their design chart is matched reasonably well with the experimental and numerical data. Ling-gang Kong and Li-min Zhang (2007). Effect of Pile-cap Connection on Behaviour of Torsionally Loaded Pile Groups Evaluation of the responses, under torsion, of fixed as well as pinned pile cap was done by the authors. They have researched that, the torsional capacity of the pile group is significantly influenced by the pile-cap. The same applies with the pile-groups torque assignment. The authors claim that grouped piles are usually used as foundations for offshore platform, bridge bents and tall buildings. Due to natural disturbances like wind and wave actions, ship impacts or high-speed vehicles, the grouped piles may be exposed to significant torsional loads, leading to destruction and catastrophic effects on them. The authors have found that the lateral ad torsional resistance of the individual piles is mobilized by a pile group which is subjected to torsion. This could thrust up to 50% of the applied force, whilst the pile-cap foundation is fixed. From the research it has been noted that under loose sand the pile bend a minimal degree. Whereas under dense sand, and the same load, the pile bend less than the loose sand. They have modeled nonlinear soil response and major pile-soil-pile interactions and coupling effect in a pile group. Weiming Gong, Guoliang Dai and Haowen Zhang (2009) Experimental Study on pile-end post-grouting piles for super-large bridge pile foundations. The authors made an experimental study on pile-end and post-grouting piles for very large bridge-pile foundations. Before the after-grouting works were evaluated, the authors wanted to analyze the bearing capacity, bearing characteristics and displacement. The authors introduced 21 test piles to perform the experiment. The technique was implemented to increase the capacity as well as decrease settlement. The author has done a lot of background researches, across various bridges. From the research it has been found that the capacities are greatly enhanced after pile-base grouting. The Q-s curve before grouting decrease sharply under small loads and have great deviations from existed geological values, which attributes to long term interval between drilling and grouting. So the authors have proved that, by grouting, they have steadily increase the bearing capacity of a bridge. Order of Paragraphs Kevin and Hesham have done a research on single piles, after anticipating the catastrophic losses in terms of human life and economic assets due to the earthquakes. They wanted to develop a model which evaluates the effects of ground motion on piles. Their aim was to develop a finite element model that can accurately model the kinematic soil-structure interaction of piles, accounting for non linear behavior of soil, discontinuity at the pile soil interface, energy dissipation and wave propagation. They found that the effect of the response of piles in elastic soil was slightly amplified in terms of accelerations and Fourier amplitudes. The authors have taken a good amount of information from previous researches made. They have found that the previous studies had its own drawbacks, which were concluded that interaction effects on kinematic loading are not significant at low frequencies but are significant for pile head loading. The authors used finite element program, ANSYS to analyze the full 3D transient method. They have found that the deflections obtained in the study were slightly greater than those from other tests. The authors concluded that the effect of soil layer overlaying the bedrock was to amplify the bedrock motion, which results in a higher free-field motion for the soil parameters used in the analysis. Increased Fourier amplitudes at the predominant frequency was an effect of soil plasticity. It slightly decreased the maximum acceleration amplitudes. The authors conducted a study on the effect of pile head fixity on the displacement of laterally loaded pile groups using analytical methods. It was found that the soil parameters have a major influence on the reduction factor, while the pile property influence is relatively minor. The rationale behind the problem is described as most pile foundations have pile cap that reduces the lateral displacement because of restraining effect on the pile heads. The authors learned that the previous researches which were done were for small-scale tests only. The authors have performed numerous tests, from which they found that there is a variation of reduction factor with soil properties for the drained cohensionless model. The authors have done a quantitative analysis to investigate the effect of pile head restraint on the displacement using an analytical method. Their design chart is matched reasonably well with the experimental and numerical data. The authors carefully studied the reaction of two types of pile cap (fixed pinned) under torsion. They have researched that, the torsional capacity of the pile group is significantly influenced by the pile-cap. The same applies with the pile-groups torque assignment. The authors claim that grouped piles are usually used as foundations for offshore platform, bridge bents and tall buildings. Due to natural disturbances like wind and wave actions, ship impacts or high-speed vehicles, the grouped piles may be exposed to significant torsional loads, leading to destruction and catastrophic effects on them. The authors have found that the lateral ad torsional resistance of the individual piles is mobilized by a pile group which is subjected to torsion. This could thrust up to 50% of the applied force, whilst the pile-cap foundation is fixed. From the research it has been noted that under loose sand the pile bend a minimal degree. Where as under dense sand, and the same load, the pile bend less than the loose sand. They have modeled nonlinear soil response and major pile-soil-pile interactions and coupling effect in a pile group. Adel M.Hanna, George Morcous and Mary Helmy evaluated the efficiency of pile groups installed in cohension-less soil subjected to axial loading. The authors feel that a resistance to the column load may result in a major difference between the total capacity of the individual piles and the group piles. This could lead to destruction of the building. The authors have developed an ANN (Artificial Neural Network) model to assist the research. They have found that the ANN model is nearly 80% accurate to the predicted value. The predictions are very accurate, even with low tolerance values. They have also made an ANN model which can be easily updated when new data are obtained from laboratory and field tests. The authors made an experimental study on pile-end and post-grouting piles for very large bridge-pile foundations. Before the after-grouting works were evaluated, the authors wanted to analyze the bearing capacity, bearing characteristics and displacement. The authors introduced 21 test piles to perform the experiment. The technique was implemented to increase the capacity as well as decrease settlement. The author has done a lot of background researches, across various bridges. From the research it has been found that the capacities are greatly enhanced after pile-base grouting. The Q-s curve before grouting decrease sharply under small loads and have great deviations from existed geological values, which attributes to long term interval between drilling and grouting. So the authors have proved that, by grouting, they have steadily increase the bearing capacity of a bridge. Addition of Introductory and Concluding Sentences Pile is commonly described as a columnar element of a building foundation. Its function is to transfer the load from a superstructure to the hard layer in the soil, or on to the rocks. Kevin and Hesham have done a research on single piles, after anticipating the catastrophic losses in terms of human life and economic assets due to the earthquakes. They wanted to develop a model which evaluates the effects of ground motion on piles. Their aim was to develop a finite element model that can accurately model the kinematic soil-structure interaction of piles, accounting for non linear behavior of soil, discontinuity at the pile soil interface, energy dissipation and wave propagation. They found that the effect of the response of piles in elastic soil was slightly amplified in terms of accelerations and Fourier amplitudes. The authors have taken a good amount of information from previous researches made. They have found that the previous studies had its own drawbacks, which were concluded that interaction effects on kinematic loading are not significant at low frequencies but are significant for pile head loading. The authors used finite element program, ANSYS to analyze the full 3D transient method. They have found that the deflections obtained in the study were slightly greater than those from other tests. The authors concluded that the effect of soil layer overlaying the bedrock was to amplify the bedrock motion, which results in a higher free-field motion for the soil parameters used in the analysis. Increased Fourier amplitudes at the predominant frequency was an effect of soil plasticity. It slightly decreased the maximum acceleration amplitudes. The type of soil is an important entity while fixing piles. The authors conducted a study on the effect of pile head fixity on the displacement of laterally loaded pile groups using analytical methods. It was found that the soil parameters have a major influence on the reduction factor, while the pile property influence is relatively minor. The rationale behind the problem is described as most pile foundations have pile cap that reduces the lateral displacement because of restraining effect on the pile heads. The authors learned that the previous researches which were done were for small-scale tests only.The authors have performed numerous tests, from which they found that there is a variation of reduction factor with soil properties for the drained cohensionless model. The authors have done a quantitative analysis to investigate the effect of pile head restraint on the displacement using an analytical method. Their design chart is matched reasonably well with the experimental and nu merical data. The frictional resistance of the pile is directly proportional to the soil cohesiveness, which means if the soil is cohesive, it will have a better contact with the area of the side pile. The pile cap distributes the load from the pillars, or piers, to the piles. The authors studied the reaction of the two pile caps (fixed and pinned) cap under torsion. They have researched that, the torsional capacity of the pile group is significantly influenced by the pile-cap. The same applies with the pile-groups torque assignment. The authors claim that grouped piles are usually used as foundations for offshore platform, bridge bents and tall buildings. Due to natural disturbances like wind and wave actions, ship impacts or high-speed vehicles, the grouped piles may be exposed to significant torsional loads, leading to destruction and catastrophic effects on them. The authors have found that a pile group subjected to torsion simultaneously mobilizes lateral and torsional resistance of the individual piles and the torsional resistance could thrust up to 50% of the applied force, whilst the pile-cap foundation is fixed. From the research it has been noted that under loose sand the pile bend a minimal degree. Where as under dense sand, and the same load, the pile bend less than the loose sand. They have modeled nonlinear soil response and major pile-soil-pile interactions and coupling effect in a pile group. An Artificial Intelligence based application need to be created which would perform tests based on experimental values. Adel M.Hanna, George Morcous and Mary Helmy evaluated the efficiency of pile groups installed in cohension-less soil subjected to axial loading. The authors feel that a resistance to the column load may result in a major difference between the total capacity of the individual
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