Tuesday, April 7, 2020

Quickest Way to Learn how to Write a Book Report

Do you like reading? Don’t tell me you hate it! Oh! You like reading a book and are somewhat of a bookaholic. That’s great because you got a plus point. But those of you who do not like it, there is nothing to be scared of. You can learn and master how to write a book report in quite a short time. Quick Links 1. What is a Book Report? 2. How to Write a Book Report? 2.1 Read The Book 2.2 Be Fully Prepared 2.3 Explore Information about Author 2.4 Make Jotted Notes 2.5 Book Report Outline 3. Book Report Outline 3.1 Write Introduction 3.2 Body Paragraphs 3.2 Concluding Paragraph 3.3 Book Report Template 4. Book Report Ideas 1. What is a Book Report? A book report is a written summary of some fiction or nonfiction work. It shows what you have learned from the book and help others decide whether they should invest their time reading it or not. Book report writing and book reviews are almost an essential part of the academics and reading those thick and heavy books, which do not even seem interesting, is anything but easy. However, the two should not be considered as the same thing. Unlike book reports, a book review is a critical evaluation of a book or novel where you get to provide your opinion and point of view, if you want to explore more about it, you can go through how to write a book review. 2. How to Write a Book Report? In order to understand how to write a book report, keep in mind the following steps and components while writing. 2.1 Read The Book The most important point before writing a good report is to become aware of that book, which obviously cannot be done without reading it. Things to consider while reading the book are: 2.2 Be Fully Prepared Make sure that you are free and you won't have to leave or stop reading your book to get the pending tasks done. 2.3 Explore Information about Author When you start reading some books, irrespective of the fact that it is for the purpose of writing a book report or not, paying attention to the author is important. Search for information about their life and ideology. 2.4 Make Jotted Notes Another important thing in this regard is to keep your pen and notes with you. For example, note down the important dates, the point of entry of important characters, change in tone of the author and details about the character's personality. 3. Book Report Outline By the time you are done reading the book; you'll have jotted notes with you. Use these notes to help you develop an effective book report outline. 3.1 Write Introduction Start the introduction with the name of the book, mention the author, year of publication, number of pages. Construct a strong thesis statement. The introduction comprises information about the books purpose, details about the setting and the main character of the book. 3.2 Body Paragraphs To start the writing process, you can include short plot summaries in the first body paragraph without revealing all the details about the story. Then, in the second body paragraph, give some examples from the book, to stress the writing style of the author or present the details about the discussion of the book. Explore how the characters were built over the chapters, their experiences and discuss the theme of the book in its regard. Contrary, you can compare any two of the main characters of the story. In the third body paragraph, you can add some quotes from the book to provide the authenticity to the readers. 3.3 Concluding Paragraph Summarize the points discussed in the report. Include details about referring that author or book and the type of audience that you refer for it, unless your instructor has instructed otherwise. Lastly, don't forget to: Proofread Edit and make improvements 3.4 Book Report Template We have added both fiction and non-fiction book report templates for your ease and understanding. Just fill out the answers to the questions provided in these templates and you will have a nice and informative report. (Insert book report template AND book report format) 4. Book Report Ideas Choosing a book for the report on your own, can be a challenging task. You don't have any idea about which book to read or what your professor would prefer. Here are a few ideas about the books you can write a report on: To Kill a Mockingbird by Harper Lee Animal Farm by George Orwell The Fault in Our Stars book report The Great Gatsby by F. Scott Fitzgerald The Catcher in the Rye by J.D. Salinger Hunger games book report A Tale of Two Cities by Charles Dickens Brave New World by Aldous Huxley Charlotte's web book report Kite Runner by Khaled Hosseini A thousand Splendid Suns by Khaled Hosseini Jane Eyre by Charlotte Bronte The Picture of Dorian Gray by Oscar Wilde The Odyssey by Homer Of Mice and Men by John Steinbeck Beloved by Toni Morrison Go Tell It on the Mountain by James Baldwin A Midsummer Night's Dream by William Shakespeare Voil! You finally know how to write a book report. Still not confident about writing a book report? Get in touch with 5StarEssays, where professional essay writers take care of all of your concerns and provide you with quality work and service.

Monday, March 9, 2020

The Tariff of Abominations of 1828

The Tariff of Abominations of 1828 The Tariff of Abominations was the name outraged southerners gave to a tariff passed in 1828. Residents of the  South believed the tax on imports was excessive and unfairly targeted their region of the country. The tariff, which became law in the spring of 1828, set very high duties on goods imported into the United State. And by doing so it did create major economic problems for the South.  As the South was not a manufacturing center, it had to either import finished goods from Europe (primarily Britain) or buy goods made in the North. Adding insult to injury, the law had obviously been devised to protect manufacturers in the Northeast. With a protective tariff essentially creating artificially high prices, the consumers in the South found themselves at a severe disadvantage when buying products from either Northern or foreign manufacturers. The 1828 tariff created a further problem for the South, as it reduced business with England. And that, in turn, made it more difficult for the English to afford cotton grown in the American South. Intense feeling about the Tariff of Abominations prompted John C. Calhoun to anonymously write essays setting forth his theory of nullification, in which  he forcefully advocated that states could ignore federal laws. Calhouns protest against the federal government eventually led to the Nullification Crisis. Background of the 1828 Tariff The Tariff of 1828 was one of a series of protective tariffs passed in America. After the War of 1812, when English manufacturers began to flood the American market with cheap goods that undercut and threatened new American industry, the U.S. Congress responded by setting a tariff in 1816. Another tariff was passed in 1824. Those tariffs were designed to be protective, meaning they were intended to drive up the price of imported goods and thereby protect American factories from British competition. And they became unpopular in some quarters because the tariffs were always promoted originally as being temporary measures. Yet, as new industries emerged, new tariffs always seemed necessary to protect them from foreign competition. The 1828 tariff actually came into being as part of a complicated political strategy designed to cause problems for President John Quincy Adams. Supporters of Andrew Jackson hated Adams following his election in the Corrupt Bargain election of 1824. The Jackson people drew up legislation with very high tariffs on imports necessary to both the North and South, on the assumption that the bill would not pass. And the president, it was assumed, would be blamed for the failure to pass the tariff bill. And that would cost him among his supporters in the Northeast. The strategy backfired when the tariff bill passed in Congress on May 11, 1828. President John Quincy Adams signed it into law. Adams believed the tariff was a good idea and signed it though he realized it could hurt him politically in the upcoming election of 1828. The new tariff imposed high import duties on iron, molasses, distilled spirits, flax, and various finished goods. The law was instantly unpopular, with people in different regions disliking parts of it, but the opposition was greatest in the South. John C. Calhouns Opposition to the Tariff of Abominations The intense southern opposition to the 1828 tariff was led by John C. Calhoun, a dominating political figure from South Carolina. Calhoun had grown up on the frontier of the late 1700s, yet he had been educated at Yale College in Connecticut and also received legal training in New England. In national politics, Calhoun had emerged, by the mid-1820s, as an eloquent and dedicated advocate for the South (and also for the institution of slavery, upon which the economy of the South depended). Calhouns plans to run for president had been thwarted by lack of support in 1824, and he wound up running for vice president with John Quincy Adams. So in 1828, Calhoun was actually the vice president of the man who signed the hated tariff into law. Calhoun Published a Strong Protest Against the Tariff In late 1828 Calhoun wrote an essay titled South Carolina Exposition and Protest, which was anonymously published. In his essay Calhoun criticized the concept of a protective tariff, arguing that tariffs should only be used to raise revenue, not to artificially boost business in certain regions of the nation. And Calhoun called South Carolinians serfs of the system, detailing how they were forced to pay higher prices for necessities. Calhouns essay was presented to the state legislature of South Carolina on December 19, 1828. Despite public outrage over the tariff, and Calhouns forceful denunciation of it, the state legislature took no action over the tariff. Calhouns authorship of the essay was kept secret, though he made his view public during the Nullification Crisis, which erupted when the issue of tariffs rose to prominence in the early 1830s. The Significance of the Tariff of Abominations The Tariff of Abominations did not lead to any extreme action (such as secession) by the state of South Carolina. The 1828 tariff greatly increased resentment toward the North, a feeling which persisted for decades and helped to lead the nation toward the Civil War.

Friday, February 21, 2020

Siminar to Criminal Justice paper 4 Essay Example | Topics and Well Written Essays - 500 words

Siminar to Criminal Justice paper 4 - Essay Example 2). The multifactor approach used by Glueck and Glueck (1950, as cited in Wright, Tibbetts, & Daigle, 2008) is influential in modern criminology that applies scientific methodology. This approach stresses the point that the tendency to commit crime and violence develops through time (Glueck & Glueck, 1950, as cited in Wright, Tibbetts, & Daigle, 2008). In the cohort longitudinal studies made by Farrington and West (1990), Shannon (1982) and Racine (1949), the same trend emerged with only a minority of the subjects being responsible for committing a majority of the crimes, thus reflecting a career from crime (Wright, Tibbetts, & Daigle, 2008). A criminal career approach studies the stages of offending for a period of time (Blumstein et al., 1986, as cited in Wright, Tibbetts, & Daigle, 2008) which typically spans for a short period (beginning at adolescence and ending at early adulthood) (Blumstein, Cohen, & Farrington, 1988, as cited in Wright, Tibbetts, & Daigle, 2008). Based from t he studies, criminal behavior is not stable through time. There is an onset period that begins during the teenage years. The behavior escalates and later dwindles in early adulthood.

Wednesday, February 5, 2020

The perception as a heart of art Essay Example | Topics and Well Written Essays - 1500 words

The perception as a heart of art - Essay Example This research will be required philosophy of art and aesthetics inside artwork as well as the scholastic discussion, which relate with visual perception, cognitive science and cognitive psychology outside artwork, and some experiments composed of ongoing low-relief canvas work and others, which can provide diverse features of surface. Through this methodology, It will be questioned what is the position of artwork and medium as a visual signifying process and how this 'documental surface' can be reflected into the two-dimensional artwork. Art has been a focal point for a variety of cultures since the history of time. It is an expression of how a race or a group of people perceive themselves in relation with the world around them. In this context, an important premise remains the fact that art is born from within and from influences that come from the outside. This paper is based on the fact that western culture has had an immense influence on the way art is perceived. A bench in a park well reveals the relation between simple visual response and recognition. Although this is actually made of stone, with a texture, color, pattern and other characteristics of real wood, it can be perceived as a wooden chair. Therefore, in some points of view, perceiving something as a wooden is taking the 'documental surface' 1 connected to internal value of wood. This pattern of accepting process converted with visual and perceptible feature generally and flexibly at the same time. Similarly, they indicate how artworks have been applying to the limitation, which has similarity between making and recognizing artwork. Recently noticeable thing is that certain interactional participation is distinguishing in this kind of visual specialty. These positions can be exemplified by the following premises. Conventionalizing information such as image, event and phenomena visually is natural formulation, and it appears characteristic connected to the conventional process and method. Additionally, these information are accepted by diverse medium which can observe something instead of direct eye and can be explained better by 'external characteristics' 2 of media itself. Lastly, these two features- conventionalization of information and surface feature of media compositely participate in making artwork and conversely interact as well. Background of Study It is said that the way something is built has a large bearing on how it is perceived. In the case of art, the use of mass media has accentuated the play of technology to the extent that the very way that an art form is conceptualised depends on the factors that are a part of the culture surrounding it. Since 1985, the play of mass media has begun on a note that has created the scope to create art beyond what has been seen in the conventional sense. The rise of technology has been accentuated by the west. Technology has come from the west and is associated with the west. Thus, an important premise here is that most of world sees western culture as an amalgamation of technology along with an ethic that is associated with the same. (Brown, 2005; P 2 - 6) Communication forms in the form of electronic, print and other media has had a major role in

Tuesday, January 28, 2020

Analysis Of Rayleigh Step Bearings Biology Essay

Analysis Of Rayleigh Step Bearings Biology Essay According to importance and application of slider bearings in industries, investigation and analysis of this type of bearings are significant and inevitable issue. A widely used bearing type is the slider bearings with application in many cases such as different types of engines, compressors, turbines, electric motors and electric generators. To ensure that no contact occurs between the opposing surfaces, the dimensions of the bearing surface are chosen, such that a lubricant film of sufficient thickness is available under all operating conditions. The classical theory of hydrodynamic lubrication assumes that the inertia forces in the fluid film are negligible. For large bearings using low kinematic viscosity lubricant or for high speed, the inertia forces could be important. So the inertia terms should be entered in the calculations. This increases the accuracy of obtained responses and closes them to reliable results. Rayleigh bearing is designed in 1918 by Lord Rayleigh. He was first person who considered the concept of optimization design in lubrication applications and obtained an optimum design for an infinite-length stepped bearing by the use of a variation technique (Lord Rayleigh, 1918). Since then, there have been some studies on the characteristics of step bearings. Dowson (1962) introduced the generalized Reynolds equation, which allows for cross-film temperature variations. Then, this equation solved with realistic THD boundary conditions by Ezzat and Rohde (1973) using the finite difference method. Boncompain, et al. (1986) improved the numerical model by considering reverse flow, fluid-film rupture and elastic deformations (THD solution). Auloge et al. (1983) studied the optimum design of Rayleigh step bearing and determined the relationships between step location and height along with non-Newtonian lubricants. The same method was used by Fillon and Khonsari (1996) in tracing design c harts for tilting-pad journal bearings. Jianming and Gaobing (1989) have presented the optimum design of one-dimensional Rayleigh step bearing with non-Newtonian lubricants. Tello (2003) has theoretically studied the regularity of the solution to the Reynolds equation in Rayleigh step type bearings for both compressible and incompressible fluids by employing a rigorous mathematical approach. Besides, there are many research works in which the well known Reynolds equation was solved by different numerical schemes in predicting the lubricant pressure field in step bearings (Hideki, 2005; Dobrica and Fillon, 2005). Rahmani et al. (2009) comprehensively studied the Rayleigh step slider bearing including the effect of variations of pressure at the boundaries on the optimum parameters. The bearing is also optimized considering the lubricant flow rate, friction force and friction coefficient. In all of the above studies, the Reynolds equation was solve as the governing equation for calculation of lubricant pressure distribution in bearing lubricant flow. This equation is a simplified form of the momentum equation by neglection of fluid inertia terms. It is clear that under the condition of low lubricant viscosity and high runner surface velocity, this equation may lead to unreliable results. In the present study which a numeric one, the two-dimensional Navier-Stokes and energy equations are solved by CFD method with considering the variation of lubricant viscosity with temperature. By this technique the THD characteristics of Rayleigh slider bearings running under different steady conditions are explored. 2. PROBLEM DESCRIPTION The schematic and coordinate system of Rayleigh slider bearing is shown in Fig. 1. The bottom wall of the step bearing moves with constant velocity U (runner velocity). The sudden change in film thickness generates a hydrodynamic pressure field that supports an applied load W. At the inlet section, the oil film is entered at 40oC with combination of Poiseuille and Couette flows. The total length of the bearing is and the film thicknesses before and after the step location are and , respectively. D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTSgeometryasli.wmf Fig. 1: Sketch of problem geometry Two important geometrical factors in step bearings are (1) (2) In these explanations, and represents the bearing length ratio and the bearing height ratio, respectively, which are two important bearing geometrical factors. 3. THEORY 3.1. Governing equations For lubricant flow in bearings, the governing equations which are written for a two-dimensional, steady, incompressible, laminar and variable viscosity flow consist of the continuity, Navier-Stokes and energy equations. These equations in non-dimensional forms can be written as: (3) (4) (5) (6) Where and represent the dimensionless viscous source terms: (7) (8) And is the dimensionless viscous dissipation term: (9) Also the dimensionless oil viscosity based on Vogel equation can be calculated as follows: (10) In this expression, is the temperature-viscosity coefficient of the lubricant. The value of can is determined using two given viscosity values at and as follows (Khonsari and Booser, 2008): (11) In equations 3 to 9, the following non-dimensional groups are used: (12) In these definitions, is the thermal diffusivity of the lubricant and is the inlet lubricant viscosity. The main physical quantities of interest in lubrication study are the load capacity and friction force that can be computed using the lubricant velocity and temperature fields. The load capacity of the step bearing per unit width is obtained by further integration of lubricant pressure distribution on the runner surface as follows: (13) The friction force of the step bearing per unit width is calculated by the shear stress on the bottom wall as follows: (14) Where: (15) 3.2. Boundary conditions The entire domain is fully flooded, such that oil pressure at the inlet and outlet sections of the bearing is set to zero atmospheric gauge pressure. Also the no-slip condition is employed on all boundary solid walls. At the inlet section, oil enters into bearing with uniform temperature of and a specified velocity distribution which is a combination of the poiseulle and cuette flows whose pressure gradient is determined by numerical solution of the Reynolds equation. At the outlet section, zero axial gradients for all dependent variables are employed. Finally, the adiabatic condition is imposed on all of the bearing solid surfaces. 4. SOLUTION PROCEDURE Finite difference forms of the continuity, momentum and energy equations were obtained by integrating over an elemental cell volume with staggered control volumes for the x- and y- velocity components. Other variables of interest were computed at the grid nodes. The nondimensionalized governing equations were discretized by using the hybrid scheme and numerically solved by the SIMPLE algorithm of Patankar and Spalding (Patankar and Spalding, 1972). Numerical solutions were obtained iteratively by the line-by-line method progressing in axial direction. The iterations were terminated when the sum of the absolute residuals was less than for each equation. Numerical calculations were performed by writing a computer program in FORTRAN. mesh asli11 Fig. 2: A schematic of grid generation As shown in figure 2, the computational domain is divided into three blocks, each having Nx points in x-direction and Ny points in y-direction. The mesh is non-uniform in x- and y- directions, because the grid refinement around the step is necessary to capture the occurrence of the recirculation and other flow changes due to the sudden change in geometry. As the result of grid tests for obtaining the grid-independent solutions, an optimum grid is determined in grid study. Five different numbers of grid size inside the total rectangular computational domain including the blocked-off region with their related numerical results are listed in Table 1. According to this grid study, an optimum grid of 640120 is used in all of the subsequent test cases. Table 1: Grid independent study, Grid size Bearing friction force (KN/m) Bearing load capacity (KN/m) 45080 0.231 16.45 540110 0.217 17.17 590110 0.231 17.48 640120 0.239 17.51 680140 0.241 17.52 5. VALIDATION OF NUMERICAL RESULTS To test the validity of the present numerical results, computations were carried out for a test case and the computed results were compared with the theoretical findings by other investigators. The lubricant pressure distribution on the bottom wall and the temperature distribution on the top wall of the Hideki bearing (Hideki, 2005) are shown in Figs. 3 and 4, respectively. D:payanameThermohydrodynamic with subroutin.mesh moteghayervalidation with Ogata(temprature)Plot validation with OgataCJS.wmf Fig. 3: Lubricant pressure distribution on the bottom wall of the Hideki bearing (Hideki, 2005), The generated hydrodynamic pressure by the sudden contraction in flow domain is clearly seen in Fig. 3, such that at the entrance of narrow gap of the bearing, the maximum lubricant pressure occurs, and at the inlet and outlet sections, lubricant flow in at atmospheric pressure (zero gauge pressure). D:payanameThermohydrodynamic with subroutin.mesh moteghayervalidation with Ogata(temprature)Plot validation with OgataCJS temp.wmf Fig. 4: Temperature distribution on the top wall of the Hideki bearing (Hideki, 2005), Fig. 4 shows that the lubricant temperature increases along the flow direction because of the viscous dissipation in both domains upstream and downstream of the step. Such that, the rate of temperature increase in upstream region to the step is very greater than that is in downstream domain. It is due to this fact that the viscous dissipation in lubricant flow with small film thickness is high in comparison to lubricant flow with large film thickness. However, good consistencies are observed between the present numerical results with theoretical findings by Hideki (Hideki, 2005) about computations of both lubricant pressure and temperature distributions. 6. RESULT AND DISCUSSION In this research work, the THD characteristics of Rayleigh step bearings are obtained by numerical solution of the Navier-Stocks and energy equations using the CFD technique. An attempt is made for obtaining the effects of important parameters including the runner surface velocity, bearing length ratio and bearing height ratio on thermal and hydrodynamic behaviors of Rayleigh step bearings. All of the subsequent figures are about a Rayleigh step bearing whose properties and geometrical parameters are given in Table 2. Table 2: Bearing parameters and lubricant properties Parameters Units Values in present work b m 0.08-0.12 h1  µm 480 U m/s 10-30 Tin 40 Ï  860 Cp 2000 Kf 0.13  µ at 40 C 0.03  µ at 100 C 0.0045 0.28-0.98 1.2-2.5 First the oil flow pattern inside the bearing is shown in figure 5 by plotting the fluid velocity vectors. The adverse pressure gradient in the upstream flow domain before the step location which leads to hydrodynamic pressure generation causes a concave shape for velocity distribution. Such that the velocity distribution changes to convex shape after the step where there is a favorable pressure gradient. Behind the step surface near to the stationary wall, a circulated flow domain happens which is due to the effects of both viscous friction and positive pressure gradient in this region. As another result that can be seen from Fig. 5, one can notice to almost stationary flow region in block 1 (see Fig. 2). Therefore, the lubricant average velocity across blocks 2 and 3 remains approximately constant. C:UserszahraDesktopUntitled.png Fig. 5: Velocity vectors in step bearing lubricant flow, In Fig. 6, the lubricant pressure distributions along the bottom wall at five different values for the runner surface velocity are shown. It is seen that the velocity of moving surface has considerable effect on the value of generate hydrodynamic lubricant pressure, such that oil pressure has an increase trend by increase in velocity under a unique pattern. D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTScompare of PKcompare of speed runner.pkspeed runner.wmf Fig. 6: Effect of runner surface velocity on lubricant pressure distribution along the bottom wall, A similar study is done for investigating the effect of runner velocity on thermal behaviour of step bearing in Fig. 7. It is seen in this figure that bearings with high runner surface velocity operate under high temperature condition. Besides, it is depicted in Fig. 7 that in both domains before and after the step, lubricant temperature increases along the flow direction because of the viscous dissipation. Also, it is seen that the oil temperature at the outlet section is affected strongly by the runner velocity, such that the bearings with high velocity have high temperature lubricant flow at their outlet sections. D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTScompare of TPcompare speed of runner.TpTshaftTshaft.wmf Fig. 7: Effect of runner surface velocity on lubricant temperature distribution along the bottom wall, D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTScompare of PKcompare of epsilonepsilon.wmf Fig. 8: Effect of bearing length ratio on lubricant pressure distribution along the runner surface, The lubricant pressure distributions along the runner surface at four different values of the bearing length ratios are illustrated in Fig. 8. It is evident that the location of maximum pressure moves toward the downstream side by increasing in bearing length ratio, because the step location moves toward this sense when increases. Besides, it can be found from Fig. 8 that there is an optimum value for bearing length ratio to obtain the most value for lubricant maximum hydrodynamic pressure. It is depicted in Fig. 8 that this value for bearing length ratio in this test case is. Therefore, is an important parameter in step bearings that has great effects on lubricant pressure and consequently in bearing load capacity. The effect of bearing length ratio of thermal behavior of step bearing is studied in Fig. 9 by plotting the lubricant temperature distributions on the runner surface for bearings with different length ratios. This figure shows that the effect of on temperature distribution is less than its effect of the hydrodynamic lubricant pressure. However, this figure depicts that bearings with length ratio greater that run cooler than the bearings with small less than. D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTScompare of TPcompare of epsilonCompare Tshaft of epsilonTshaft.wmf Fig. 9: Effect of bearing length ration on lubricant temperature distribution along the runner surface, The variations of lubricant maximum pressure and temperature with bearing length ratio are presented in Fig. 10. This figure reveals the same trends for THD characteristics of step bearing those have been shown in the previous figures. D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTSplot Epsilon moteghayer(W.F.eta.etam)compare of ep.P.T.wmf Fig. 10: Variations of lubricant maximum pressure and lubricant maximum temperature with bearing length ratio, In order to study more about the effect of bearing length ratio on THD characteristics of step bearings, the variations of bearing load capacity and friction force with are plotted in Fig. 11. This figure presents that there is a maximum value for load capacity that takes place at =0.718. Besides, it is revealed from Fig. 11 that in bearings with high length ratio, low friction force exists in comparison to bearings with small values for . D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTSplot Epsilon moteghayer(W.F.eta.etam)compare of ep.w.f.wmf Fig. 11: Variations of load capacity and friction force with bearing length ratio, Similar study is also done for investigating the effect of bearing height ratio on THD characteristics of step bearings by plotting the lubricant pressure and temperature distributions and also the variations of load capacity and friction force with various values of the parameter . According to Figs. 12 and 13, it is revealed that the values of lubricant pressure and temperature increase by increasing in bearing height ratio. D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTScompare of PKcompare of ksiksi.wmf Fig. 12: Effect of bearing height ratio on lubricant pressure distribution along the runner surface, D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTScompare of TPcompare of ksiCompare Tshaft of kesiTshaft.wmf Fig. 13: Effect of bearing height ration on lubricant temperature distribution along the runner surface, This behavior is also presented by Fig. 14 in which the variations of maximum lubricant pressure and temperature are plotted with bearing height ratio. It is seen that both and have increasing trends with increase in the value of , such that the rate of increase in maximum temperature is greater than that is in maximum pressure. D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTSplot Kesi moteghayer(W.F.eta.etam)compare of ksi.P.T.wmf Fig. 14: Variations of lubricant maximum pressure and lubricant maximum temperature with bearing height ratio, Fig. 15 shows a similar trend for bearing load capacity and friction force with the variation of height ratio. Such that it is seen in this figure that both load capacity and friction force increase with increasing in bearing height ratio. D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTSplot Kesi moteghayer(W.F.eta.etam)compare of ksi.W.F.wmf Fig. 15: Variations of load capacity and friction force with bearing height ratio, In the following figures, an attempt is made to verify the influences of bearing length, b, on the THD characteristics of step bearings. D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTScompare of PKcompare of length bearingcpmpare b.wmf Fig. 16: Effect of bearing length on lubricant pressure distribution along the bottom wall, D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTSplot Lenght moteghayer(W.F.eta.etam)TshaftTshaft.wmf Fig. 17: Effect of bearing length on lubricant temperature distribution along the bottom wall, It is seen from Figs. 16 to 19 that in long bearings, the values of lubricant pressure and temperature and consequently the amounts of maximum pressure and temperature are high that leads to have high bearing load capacity and bearing friction force. D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTSplot Lenght moteghayer(W.F.eta.etam)compare of length.p,T.without point.wmf Fig. 18: Variations of lubricant maximum pressure and lubricant maximum temperature with bearing length, D:payanameThermohydrodynamic with subroutin.mesh moteghayerPLOTSplot Lenght moteghayer(W.F.eta.etam)compare of length.w,f.without point.wmf Fig. 19: Variations of load capacity and friction force with bearing length, 7. CONCLUSION This paper deals a numerical study for investigating the THD characteristics of Rayleigh step bearings running under different steady conditions. The set of governing equations consisting of the Navier-Stokes and energy equations is solved by the CFD technique and the variation of lubricant viscosity with temperature is also considered into account. This mathematical model and numerical method lead to more accurate numerical results in comparison to those obtained before by other investigation with numerical solution of the Reynolds equation that neglects the fluid inertia terms. It is found that the thermal and hydrodynamic behaviors of step bearing are affected considerably by the runner surface velocity and the bearing geometrical factors. Nomenclature B bearing length dimensionless velocity components upstream bearing length load capacity of bearing downstream bearing length horizontal and vertical coordinates Cp heat capacity dimensionless coordinates friction force of bearing upstream film thickness Greek symbols downstream film thickness friction coefficient step height modified friction coefficient Kf thermal conductivity dynamic viscosity width of bearing dimensionless dynamic viscosity origin of coordinate  µ1 dynamic viscosity at pressure  µ2 dynamic viscosity at pressure at the inlet kinematic viscosity pressure at the outlet density dimensionless pressure shear stress Pr Prandtl number Pe Peclet number Subscripts Re Reynolds number fluid Temperature inlet Tin inlet temperature maximum dimensionless temperature surface runner velocity velocity components

Monday, January 20, 2020

Cloning: An Option for Endangered Species Conservation Essay -- Biolog

Cloning: An Option for Endangered Species Conservation Review of the Literature Geneticists know that the technology of cloning lies in the palm of their hands, and its use on domestic animals and now endangered species has already proven successful (â€Å"Endangered Species†; Fields-Meyer and Seaman;Holt et al.; Lanza et al.; Trivedi). The question I ask now is this: Will cloning be used in the conservation of endangered species? This very question has sparked debate between the scientific community and many conservationists. Contrary to the values set forth by many conservationist groups, my research suggests that the cloning of endangered species is, in fact, a viable option in their preservation and repopulation. Most of the sources I have used in my research have supported the idea of using cloning to rebuild animal populations or at least obtain viable DNA from endangered animals. The prominent scientists Betsy Dresser, Robert Lanza, and Philip Damiani of the Advanced Cell Technology laboratories in Worcester, Massachusetts, expressed their optimism about cloning endangered species in the article "Cloning Noah's Ark." Dresser and Lanza were also quoted in several online news sources I used as well. They conclude that "Biotechnology might offer the best way to keep some endangered species from disappearing from the planet" (Lanza et al). As my research suggests, cloning endangered species will surely have its benefits in keeping these populations alive, an option which conservationists cannot deny. These scientists I have mentioned do not ignore opposition to their scientific claims from conservationists skeptical of the uses of cloning and leery that it usage will deter humans from restoring natural habita... ...://www.reproduction-online.org.silk.library.umass.edu:2048/cgiLcQntent/ full/127/3/317>. Lanza, Robert P., Betsy L. Dresser, and Philip Damiani. "Cloning Noah's Ark." Scientific American 283 (2000). Academic Search Premier. 22 Oct. 2005 &db=aph&an=3664004>. Ryder, Oliver A. "Cloning advances and challenges for conservation." Trends in Biotechnology 20.6 (June 2002): 231. Academic Search Premier. EBSCO. DuBois Library, Amherst, MA. 22 October 2005 rect=true&db=aph&AN=7799659&site=ehost-live>. Trivedi, Bijal P. "Scientists Clone First Endangered Species: A Wild Sheep." National Geographic News. 29 Oct. 2001.14 Oct. 2005 1/10/1025 TV sheepclone.htm>.

Sunday, January 12, 2020

Explain How Practices That Support Equaity and Inclusion Reduce

Amanda Hopwood Cache Level 2 in Diploma in Children’s Care, Learning and Development Pin/Enrolment Number – 30169038 ULN – 6939676189 Assessor – Jennifer Hughes Assurer – Helen Tweddle SHC 21 Introduction to equality & inclusion in health, social care or children 7 young people settings 1. 1 –Explain what is meant by: Diversity – means is to understand that each child/young person is individual, unique and different i. e. , it could be the differences in race, heritage, customs, beliefs, physical appearance, mental capability.Diversity should be valued and respected as each person are completely different to any other person, even in the examples I have stated above. We need diversity as is gives us different views and opinions. We must value our diversity so we can work together to live a happy life. Equality – means to give all children/young person equal opportunities to achieve their best in the setting. Each child is differ ent so you have to respect that. Some children might need support. You can do this by planning ahead to achieve all aspects of learning and development for all children irrespective of disability, heritage etc.It's about getting the balance between each child. Inclusion – means to ensure all embodies such as children and their families have the right support regardless of their ability to take part in a range of activities in the setting. Inclusion is the process of making this happen. to do this in the setting you must take away all barriers and give each person a warm and welcoming attitude whilst in setting. Discrimination – means a child/young person is treated differently because of their membership such as race, colour, gender, religion, ancestry, origin, disabilities.It involves excluding or restricting child/young person in a membership from opportunities that are available to other children/young person. Children may experience discrimination because of their colour, culture/religion, impairments, gender, race, size because they are disabled or have special educational needs. Children who are discriminated may feel undervalued and may lose confidence. They may find others will have a low expectations of what they can achieve. Others might assume they cannot do an activity as they can't cope.