My Ojt Experience Essay Example

My Ojt Experience Essay II. Brief History / Background of the Company / Company Profile The history of this Computer Shop is so inspiring for me because they start in a small business and for being industrious they build a lot of business that make them higher than a eagle. Before we start planning build a computer shop we decided to start selling Shirts, Footwear and some accessories we keep all the money we collect from our small business until we get a place where we can rent for our Computer Shop. We start making computer stands after hat we bought only three (3) Computers and we build our computer shop in the month of June year 2006. One day we start opening our small Computer Shop. Even though I have only here (3) Computers were not expecting that we can have our customers early in the morning even though our price per hour is Twenty Five Pesos (25). In one day we collect only three hundred fifty Pesos (350) but even though that money is too small for us, it is okay because it can help for our business to make It Big. We continue opening our Computer Shop until we buy another Four (4) Computers so we have Seven (7) Computers and because of that we collect a lot of moneys that help us to buy a Printer Machine and a Scanning Machine because of that we are so stressed because there`s a lot of task we do. So we start finding our helper and we find Jiegs Silang he is a High school graduate but he is so intelligent he is a fast learner about computers. He live in Nasugbu Batangas he is our helper until our Computer Shop becomes one year. We decided to name our Computer Shop and the name of it is Awoor Open Kalate Compuer Repair Shop, we decide to that name because we also repairs computer like Formatting and PC Assembling. This business is so amazing because it helps to give education to my children we continue managing our Computer Shop until we collect moneys o buy six (6) Computers so that we have a total of 13 Computers. We complete our computers in he year of 2011. We will write a custom essay sample on My Ojt Experience specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on My Ojt Experience specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on My Ojt Experience specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We are so happy and thankful because we’re not expecting that our business will become long and then we add some small business like Master Shomai, Coco Prince add some, Fish Ball, Kikiam and Kwek Kwek Stall. In the year 2012 were not expecting that the small business we add will become large until we fund a lot helpers, like Michael Silang, Accelle Joy, Darwin Silang and John Paul Montales. They are he one who helps us to build and to manage our business which is seven years from 2006 until 2013 even though we reach seven years we did not decide to stop our business because it help me to have a Good Life. III. Summary of the OJT Experience The Trainee is Mr. John Paul Noveno Montales, On-the-job training is one of the requirements of any students taking up the Diploma in Computer Electronics and Technology. I started in my OJT on month of July 07, 2012 and in this month of July Im pretty well trained to work here because I worked here before and today I start to OJT I achieved like Hard disk drive of the computer is broken and for this work I replaced another Hard disk drive. I also have other achievement such as typing a very long story, laminate of ten pieces of ID pictures, Xerox of one piece of English book and of course all of this were done and completed. And month of August I also have other achievement like if the power supply of the computer is loss and for this work again I replaced another power supply and finally the power supply of the computer is working again. Throughout the month of august I also have other achievement like the ram or memory of the computer is not working for short it was loss and I did this it should be to clean up the memory using a pencil eraser to work it again. Month of August I am still typing a very long story of a parable, Xerox of ten pieces Diploma, ten pieces of Birth Certificate, ten pieces of Bio – Data and laminate five pieces of ID pictures and of course all of this were completed. And now in month of September I’m very happy because my supervisor was promote me to a computer assistant and this I recounted my parents that I was promoted to a computer assistant. I also have another achievement of this month of September like Xerox, printing, laminate and typing another long story of the parable that just as I had done previously. The last time that I’m attend in month of September 30, 2012 I stopped to attend the OJT because I’m very busy to make my project in my major subject and I also review my minor subject and major subject for this coming final exam. The month of November I will begin again to attend the OJT because now I have time to OJT because I`m not too busy in school and my supervisor was very glad because I was able to return to OJT again and I was very glad also. I made this month of November was reformatting ten pieces of computer on the other comp shop but it was owned by my supervisor and I made it two days because relatively long after I reformat and Installed drivers and games of course I finished all do ten pieces of computer and it will be open to earn money. And this month of December I still did OJT and I experienced our Xerox machine was broken and exactly two man who want to undergo Xerox a whole book, and ten pieces of Bio – data and I do not know how to fix the Xerox machine and I call my supervisor to say that the Xerox machine is broken and my supervisor said wait for me to fix the Xerox machine and I told to the customer who want to undergo Xerox was not available but after a few minutes my supervisor came to his shop to fix it and I’m happy for that. I stopped again to attend the OJT and this was the Second time to stop to attend my OJT because that time was to prepare for Christmas and of course this was the day we have a family gathering together sometimes we just take along together and that only occurs when there is an occasion like Christmas. I started again to attend my OJT because I`m not busy in my family and now I have time to attend my OJT and today I will do what should I do like Xerox five pieces of documents and PC assembling. Now I stopped again to attend my OJT and this is the Third time to stop to attend my OJT because today was New Year’s Day and Im happy because this was the day we have a family gathering together again and of course we all have families complete and by twelve oclock in the morning We watched fireworks in the sky and then we all eat together. And this month of January I started again to attend my OJT and I also achieved like formatting a computer, pc assembling, and I experienced our motherboard of the system unit were overheat and because it was broken and it was not available so I just replaced another motherboard for it to work again and I’m happy because the motherboard of the system unit was working so we can use it and now that the time of my OJT was near I spent my days only to complete my OJT and I was very glad because the seven months I spent hours on the comp shop I was fully finished my OJT. A. New knowledge, attitudes, and skills acquired The first that I had learned in the Awoor Open Kalate Computer Repair Shop is to be a hard working person and to be a responsible to all things that should I do. I also learned how to fix Xerox Machine and how to use it. It was so easy to Xerox but in my OJT experience it was so hard if there were a lot of papers to be done and I was so glad that I learn how to use it. I also applied at the Comp shop my knowledge in computer when I was high school. Sometimes it was so boring and tedious to have my OJT because I am lone and don’t have friends to talk but the only thing that I did was play some music and watching movies it was my doings when I am bored and tedious it was why don’t stop my OJT and to accomplish my goals in my life and I need to finish my OJT for my family. B. Theories actually seen in practice I realized that if there was an OJT was not so easy, tedious, made me being lazy I felt it when I am doing a lot or you had nothing to do but I made it by pushing myself to did my jobs and to push myself to be a hard working person. I also learned that in all aspects of problems there was a solution. I also push myself not to stop my OJT and not to stop to fix my problems that I encountered. Now, if I have a problems that I can’t solve I pursue to make it and to be successful to my OJT instead of giving up I will make my best to be a successful person. C. Feedback that can be given to the company or institution When I started my OJT my supervisor ask me that what I can do to his computer shop or if I know something about in computers. I said yes to my supervisor I have know something to computers and I said to my supervisor that if there was a thing that I didn’t know was to betray my supervisor and I said to my supervisor that I am fast learner. I also said to my supervisor that I can help more to his computer shop because I am getting better when I am doing something and practice for it and I am good in some jobs like typing some documents and repairing computers. I enjoy my OJT. In some doings I am compatible with my OJT because I had some ideas to help to my OJT and I experienced the others problems so my OJT was not so hard at all. D. Benefits gained The benefits that the trainee learns at the Awoor Open Kalate Computer Repair Shop are as follows: to be discipline at the work and to be responsible and intelligent, must always be on time, and to be patient with the customer should come. I started to my OJT I learned to be responsible to all aspects and to be diligent, hard working and of course to be friendly and patient. I promise to myself that I will not forget what I learned. I will remember it until I am alive and use it to all things that can apply because of you have this attitude you can recognize by others. It will be applicable when I friends or I have my own job and to my fellow workers. In what I learned to my OJT and to my loving parents I will use to all things in my life and I am so proud that I learned. I will do my best to be a successful man to have good and peaceful life. E. Problems encountered The problem that the trainee encountered at the Awoor Open Kalate Computer Shop is the Xerox machine was broken and exactly two man who want to undergo Xerox a whole book, and ten pieces of Bio – data and I do not know how to fix the Xerox machine and I call my supervisor to say that the Xerox machine is broken and my supervisor said wait for me to fix the Xerox machine and I told to the customer who want to undergo Xerox was not available but after a few minutes my supervisor came to his shop to fix it and I’m happy for that.

Answers to Questions About Referring to Death

Answers to Questions About Referring to Death Answers to Questions About Referring to Death Answers to Questions About Referring to Death By Mark Nichol Here are three questions about how to treat references to people who have died, and my responses. 1. For how long after someone’s death is it necessary and/or appropriate to use â€Å"the late† to describe them? I know we don’t say â€Å"the late Ludwig van Beethoven,† but what about a board chairman who died twelve years ago? There’s no standard rule, but in objective, dispassionate content, late should generally be used only a few years after someone’s death. (A widow or widower referring to a deceased spouse, however, gets a lifetime pass.) 2. If I refer to someone’s having died in 2001, do I refer to the person in the same sentence as â€Å"the late John Smith,† for example, or is that redundant? Late is redundant to an explicit reference to a person’s death, and the objective reference is preferable to late. For example, â€Å"The project was funded by a bequest from the late John Smith, who died in 2001† is redundant, and â€Å"The project was funded by a bequest from John Smith, who died in 2001† is preferable to â€Å"The project was funded by a bequest from the late John Smith,† because the former sentence is more specific. 3. Is it objectionable in formal writing for the general public to refer explicitly to death i.e., are euphemisms like â€Å"passed away† truly preferable to died? On the contrary: Died is preferable to euphemisms like â€Å"passed away.† In informative text, use straightforward language; readers appreciate clear, specific wording and don’t need to be coddled with tiptoeing generalities. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the General category, check our popular posts, or choose a related post below:10 Rules for Writing Numbers and NumeralsGrammar Quiz #21: Restrictive and Nonrestrictive ClausesA "Diploma" is not a "Degree"

Technology from print to pixel Essay Example | Topics and Well Written Essays - 250 words

Technology from print to pixel - Essay Example This reading from the screen and its effectiveness and visible results continues for the rest of the day until the time one will go to bed This new way of reading will definitely change the way people write. As the information flows and is streamed in the screens at a very quick speed, more people will start writing in prose and in other short forms as a way of saving time. This new form of writing will not be strange as translations of the words can be easily got from the same screens and because there is a lot of linking with the new technology in reading, it will not be strange at all. The writing unlike before will continue to increase and a faster pace for that matter as more and more people young and old engage in asking questions and getting written faster and even immediate response hence making them write even more as a way to gain faster knowledge and pass the same knowledge to others through the same

Finance 3000 2day Essay Example | Topics and Well Written Essays - 3000 words

Finance 3000 2day - Essay Example Market average input prices were accordingly used to determine cost and give tangible results when used in SFA. Data Presentation The figure showing changes of profit efficiency of the Chinese banking industry This figure underscores the effect of penetration of foreign banks on Chinese domestic banks. During the initial stage of market penetration, domestic banks drop or stagnant in terms of profit efficiency. This is occasioned by the need to increase investment in technology and efficient systems in order to stay competitive. These measures drive the cost upwards resulting in decreased profit margin. The trend changes to that of growth after the necessary technology and efficient systems are in place. The exponential growth face exceeds the negative impact occasioned and this in general increases profit efficiency and by extension the efficiency of the domestic banks. These results indicate that City commercial banks are the most profit efficient whilst state-owned banks being the least in terms of profit efficiency. This is a deviation from the fact that state-owned banks (SOCBs) tend to be more cost effective. The reason for this is that SOCBs tend to have higher Non-performing loans (NPLs) than City commercial banks (CCBs). ... to measure efficiency of banks from a different perspective and the following figures depict the mean technical efficiency in the Chinese banking sector by bank type: A. B. Model A is an experiment on profitability or income generation while model B examines the efficiency of earning asset production and growth. A quick comparison of these two models shows that within the first five years model B reached an efficiency at a faster pace than model A. This is an indication that banks here were more poised on asset building rather than profitability. In the year 2000 the graphs are flat indicating diminished growth occasioned by the banks being more profit conscious instead of first pursuing asset growth. Further interpretation of the data in model A shows that JSCBs are more efficient and better performers than all the other banks. This could be attributed to the fact that JSCBs are more autonomous and free of direct intervention by the Chinese government. JSCBs are also not faced with numerous challenges of NPLs like SOCBs. CCBs have a poor showing indicating bias or small sample size of these types of banks while researching. Chen et al (2005) findings are proven in model B whereby SOCBs outperform JSCBs in efficiency. This, however, is in direct contravention of known literature depicting the relationship between the government and the banking industry. A possible answer could be that the vast amount of state funds poured into SOCBs for their growth is having an impact and the banks are gaining stability. These two models of income based and asset based are another way to measure the impact that foreign banks have had on the efficiency of the Chinese domestic banking industry. A clearer picture is painted by including other parameters. Discussion For a very long time

The complexity of Management Essay Example | Topics and Well Written Essays - 2500 words - 1

The complexity of Management - Essay Example In this paper, the proponent clearly illustrates situations that identify existing complexities within an organisation. Marketing versus accounting department In most instances, there is always an ongoing clash between the accounting and marketing department. This is because of the meaning of accounting in an organisation seems to be broad (McSweeney, 1995). In order to understand this in detail, there is always a good reason to believe that each department has essential role or function to play in an organisation. In line with this, it is necessary that these specific functions have to be elaborately discussed in detail in order to find out why there is an ongoing complexity that exists within an organisation. A salesperson was having a hated argument with an accounting staff. The problem was actually within the bound of how they tried to handle customer service. The salesperson was so aggressive about creating a sale with the customer and he was always ready to shortcut the process just to be able to close the deal. However, the accounting staff understood her function clearly well. In other words, she was so aggressive about the implementation of what has been agreed within their department. As a result, there was a strong clash of personal interests of each department that went on between the accounting staff and salesperson. ... In other words, some rules employed by the company may be altered just to be able to prioritise what is deemed important for the achievement of the ultimate goal of the company. The ultimate goal is to have excellent financial performance that will enable the company to continue operation. However, there may be always a compromise in the process. The accounting department is such a complex component of an organisation because it primarily involves finances in general. It involves the general role of an organisation to handle every necessary aspect in financial activities that will make the entire flow of the organisation run smoothly. For instance, cash flow is important and even return of investment is necessary in order that the operation will continue to have healthy performance. These activities are necessary and they are handled by the accounting department in general. However, their tasks have specific goals and objectives that in the process will run against the objectives of other departments. For instance, the sales department is there to help the accounting department reach the objective in obtaining healthy cash flow. The sales department is there in order to help the company reach its full potential in obtaining high return of investment that the bottom line is to have a positive healthy cash flow. However, this does not run smoothly as always as it might be expected. There are some specific concerns. For instance, the company may declare terms and conditions of payments. Some customers may ask about longer terms especially when they are trying to place high orders that are far from what is expected. Some companies may not have looked on this in advance but the accounting department may be strict about its

A Hydraulic Accumulator Energy Engineering Essay

A Hydraulic Accumulator Energy Engineering Essay A hydraulic accumulator is a device in which potential energy is stored in the form of a compressed gas or spring, or by a raised weight to be used to exert a force against a relatively incompressible fluid. They are used in fluid power systems to accumulate energy and to smooth out pulsations. Accumulators store energy when hydraulic system pressure is greater than the accumulator pressure and provide hydraulic energy when the accumulator pressure is greater than the system pressure. By storing and providing hydraulic energy, accumulators can be used as a primary power source. Accumulators are inherently dynamic devices, they function when configuration changes (actuators moving, valves opening, etc.) are occurring within a hydraulic system. Accumulators respond very fast to configuration changes, nearly instantaneously for gas accumulators. They are usually used in conjunction with a pump/motor in a hydraulic circuit. A hydraulic system utilizing an accumulator can use a smaller fl uid pump since the accumulator stores energy from the pump during low demand periods. The pump doesnt need to be so large to cope with extremes of demand, so that the supply circuit can respond more quickly to any temporary demand and to smooth pulsations. The capability and affect of the accumulator is determined by the overall volume of the accumulator and preload/pre-charge of the spring/gas. There are 4 types of accumulators: bladder, diaphragm bladder, piston (either spring or gas controlled) and metal bellows. The choice of accumulator to use in a given application depends on required speed of accumulator response, weight, reliability and cost. Pressurized gas accumulators will have the faster dynamic response and are reliable. Metal bellows accumulators are very reliable, but will not respond as fast as a pressurized gas accumulator. Accumulators with seals generally have the lowest reliability. Accumulators are either spherical or cylindrical in design. Bag, piston and metal bellows accumulators are cylindrical. Diaphragm accumulators may be spherical or cylindrical. Accumulators are usually manufactured into 2 halves which are either welded or threaded together. A fill port is installed at one end of a gas accumulator and the hydraulic connection fitting (with poppet valve, if required) is installed at the opposite end. For a spring accumulator, the non pressure sid e usually has a fitting that connects to the hydraulic reservoir (for seal leakage and to alleviate back pressure on a piston). Materials are usually steel, but accumulators may also be made from aluminium or a composite (filament wound) material. Compressed gas accumulators are by far the most common type; these gas accumulators take advantage of the fact that the gas is compressible. A gas accumulator has a gas pre-charge that is less than the nominal hydraulic system pressure. As hydraulic fluid enters the accumulator the gas is compressed to the nominal system pressure, which is an equilibrium position and represents the maximum amount of energy stored by the accumulator. As system hydraulic pressure drops, the gas will expand pushing hydraulic fluid back into the system. The gas pre-charge level is an important parameter for gas accumulators since the pre-charge and overall accumulator volume; determine the maximum amount of hydraulic energy that will be available to the system. The pre-charge is the pressure of the gas in the accumulator without hydraulic fluid in the fluid side. A gas accumulator is pre-charged with nitrogen gas when there is no hydraulic fluid in the accumulator to the desired pressure. The gas accumulator pre-charge is a very important variable for ensuring optimal accumulator performance and maintaining long life of the accumulator. Too high of a pre-charge pressure and the fluid volume capacity is reduced. Furthermore, if a bag accumulator charge is too high than the bag may hit the poppet valve which could damage the bag through repeated hits in service, or cause a fatigue failure in the poppet valve assembly. For a piston accumulator, the piston may be driven into the stops repeatedly affecting seals or cause a fatigue failure in the piston stop. Too low of a pre-charge pressure and the accumulator may not maintain desired minimum hydraulic system pressure. Also a low pre-charge pressure will allow a piston accumulator to repeatedly hit the up stops leading to premature failure of the accumulator. For a bag accumulator, the bag may be forced into an unnatural shape (e.g.,with folds) leading to bag damage and premature bag failure. When sizing an accumulator the pre-charge pressure is an input to the sizing process. However, once the accumulator is sized the minimum and maximum gas volumes should be computed (under worst case conditions) and analyzed to ensure piston stops are not hit or that a bag cannot fully collapse or expand completely in the accumulator. Bladder Accumulator A bladder accumulator consists of pressure vessel with an internal elastomeric bladder with pressurized nitrogen on one side and hydraulic fluid on the other side (system side). Figure 1 shows a bladder accumulator. It has 3 stages of operation: The accumulator is charged with nitrogen through a valve installed in the top. The accumulator will be pre-charged to nominal pressure when the pumps are not operating. Secondly when nominal hydraulic system pressure is applied the bag will be compressed to its fully compressed state. When the bag is fully compressed, the nitrogen pressure and the hydraulic pressure are equal. Finally as system pressure drops the bag expands, forcing fluid from the accumulator into the system. As the bag expands pressure in the bag decreases. The bag will continue to expand until the bag pressure equals the hydraulic pressure (which will be lower than nominal system pressure) or the bag fills the entire accumulator volume which is an undesirable situation. A poppet valve keeps the bag in accumulator from being pulled into the downstream tubing should the bag over-expand. If the bag was pulled into the downstream tubing, the accumulator would never recharge and normal flow from the pump would be constricted. The maximum flow rate of the accumulator is controlled by the opening area (orifice) and the pressure difference across the opening. Figure http://www.globalspec.com/NpaPics/18/146314_030520074661_ExhibitPic.JPGAccumulator, Bladder Typehttp://www.globalspec.com/NpaPics/18/146314_030520074661_ExhibitPic.JPG The main advantages of a bladder accumulator are fast acting, no hysteresis, not susceptible to contamination and consistent behaviour under similar conditions. Accumulators are easy to charge with the right equipment. Because there is no piston mass, the speed of the bladder accumulator is governed by the gas, which reacts very fast to changes in hydraulic system pressure. Hence bladder accumulators are the best choice for pressure pulsation damping. Also, the bladder attachment internal to the accumulator has proven to be very reliable in service. Of course there is always the potential for bladder failure, which is a failure that would not usually be detectable in service. Also, temperature differences on the gas will have some affect on performance. The main limitation of bladder accumulators is the compression ratio (maximum system pressure to pre-charge pressure) which is limited to approximately 4 to 1. Hence gas accumulators will be larger than other accumulators for the same flow requirements. The pre-charge pressure is typically set to approximately 80% of the minimum desired hydraulic system pressure. Diaphragm Accumulator A diaphragm accumulator is similar to bag accumulator except an elastomeric diaphragm is used in lieu of a bag. This would typically reduce the usable volume of the accumulator so the diaphragm accumulator may not have volume capacity of a bladder accumulator. A schematic of a diaphragm accumulator is shown in Figure 2. http://www.machinerylubrication.com/articles/200907/pg26b.gif Figure http://www.machinerylubrication.com/articles/200907/pg26b.gif The behaviour characteristics of a diaphragm accumulator are similar to a bag accumulator and have the same advantages and disadvantages. However a diaphragm accumulator may be spherical or cylindrical (or possibly other shapes) which may be an advantage in some installations. The main difference with bladder accumulators is an increased maximum compressions ratio (maximum system pressure to pre-charge pressure) of approximately 8 to 1. Piston Accumulator A gas piston accumulator is shown in Figure 3. A gas piston accumulator has a piston which slides against the accumulator housing on seals. On one side of the piston is nitrogen and on the other side is the hydraulic fluid and connection to the system. A fill port allows pressurization of the nitrogen. Accumulator, Piston Type Figure http://www.tobul.com/index.php?option=com_contenttask=viewid=13Itemid=27 A gas piston accumulator will not respond to transient pressures as fast as a bladder accumulator due to the mass of the piston (frequency characteristics depend on piston mass and spring characteristics of the nitrogen). However, a piston accumulator will have better damping due to hydraulic leakage (viscous damping) and friction between the piston and housing (coulomb friction seal friction). Piston accumulators may also be more prone to leakage than other types of accumulators due to the seals. Piston accumulators will generally provide higher flow rates than gas accumulators for equal accumulator volumes. This is because piston accumulators can accommodate higher pressure ratios (maximum system pressure to pre-charge pressure) than gas accumulators, up to 10 to 1, compared with bladder accumulator ratios of 4 to 1. The disadvantages of piston accumulators are that they are more susceptible to fluid contamination, have a lower response time than bladder (unless the piston accumulator is at a very high pressure) and will have hysteresis from the seal friction. The pre-charge for a gas piston accumulator is typically set to around 90% of minimum desired hydraulic system pressure. A schematic of a spring piston accumulator is shown in Figure Accumulator, Spring Type In a spring accumulator, the spring applies a force to a piston which compresses (or pressurizes) the fluid in the accumulator. As normal system pressure, the spring will be fully compressed. As system flow demands exceed the pump capacity, the spring will extend pushing the piston which in turn pushes fluid into the adjoining pipe. Hence the accumulator supplements pump flow. The maximum response time of the accumulator is set by the natural frequency, which is computed using Metal bellows accumulators are used where a fast response time is not critical yet reliability is important. Emergency brake accumulators are a good application for metal bellows accumulators. The metal bellows accumulator consists of a pressure vessel with a metal bellows assembly separating fluid and nitrogen. The accumulator is similar to a piston accumulator, except a metal bellows replaces piston and piston seals. Metal bellows accumulators are very reliable and long life components, and have a proven service history. Metal bellows accumulators are pre-charged by supplier and then permanently sealed leading to a maintenance free accumulator. Metal bellows accumulators will be slow in responding to pressure changes due to increased mass of piston and bellows. The advantages to the metal bellows type include exceptionally low spring rate, allowing the gas charge to do all the work with little change in pressure from full to empty, and a long stroke relative to solid (empty) height, which gives maximum storage volume for a given container size. The welded metal bellows accumulator provides an exceptionally high level of accumulator performance, and can be produced with a broad spectrum of alloys resulting in a broad range of fluid compatibility. Another advantage to this type is that it does not face issues with high pressure operation, thus allowing more energy storage capacity. Applications of Accumulators to KERS One of the main applications of hydraulic accumulators is storing energy. Hydro-pneumatic accumulators incorporate a gas in conjunction with a hydraulic fluid. The fluid has little dynamic power storage qualities. The fluid can only be reduced a small amount in volume even under high pressure. Therefore when only a small amount of the total contained volume is released, the pressure of the remaining fluid in the system will drop to zero. However, the relative incompressibility of a hydraulic fluid makes it ideal for fluid power systems and provides quick response to power demand. The gas, however working with the hydraulic fluid in the accumulator, can be compressed to high pressures and low volumes. Potential energy is stored in this compressed gas to be released upon demand. In the piston type accumulator the energy in the compressed gas exerts pressure against the piston separating the gas and hydraulic fluid. The piston in turn forces the fluid from the cylinder into the system a nd to the location where useful work will be accomplished. On this basis, with respect to all the types of accumulator a hydro-pneumatic accumulator would be ideal for storing the energy taken out of a bike whilst braking.. Of course the loss of pressurized gas in a sealed accumulator is a failure critical to safety when it plays such an important role as braking. A team of engineering students from university of Michigan undertook a project to use a hydro-pneumatic regenerative braking on a bicycle. It was a redevelopment of a heavier previous attempt to make a working prototype to fit within a 29 front wheel. They use a 0.5L accumulator and believed this to be sufficient in storing the required energy at a maximum working system pressure of 5000psi. They failed to test and thus supply conclusive results for the performance characteristics but through theoretical analysis they prescribe the key parameters fig. Figure Its weight is clearly impractical as it weighs almost as much as a conventional bike at 13kg. In terms of weight of a bicycle with respect to saving weight, it is more important to have lighter wheels than a lighter bike frame. This is because the rolling resistance is applied at the wheels although it carries half the overall weight of bike and rider a lighter wheel makes it easier to initially start a bike. Based on the team from michigans ( ) the following calculations outline the practicality of implementing a hydraulic KERS. Firstly for a hydraulic system to be implemented the storage must be addressed the capacity must be determined and pressures needed to store the kinetic energy. A bike braking from 20mph requires 5000J of energy to power. From Parkers website a manufacture of accumulator and motors parkers rate the ACP series accumulators at max pressure 5000psi, if assuming A hydraulic KERS must use a hydraulic motor to provide enough torque to drive the bike as well as provide enough resistive torque to be an effective brake. A bicycle travelling at 20mph on 26 wheels spins the motor through 18:1 gear ratio of the pump gear train which then spins the motor 4632rpm, corresponding to 4.52 N-m torques at 3000 psi. This translates to a braking torque of about 81.36 N-m applied to the main gear due to the 18:1 gear ratio. From this brake torque is an effective brake On release of pressure fully charged 5000 psi accumulator generates 7.57 N-m of torques. The 14:1 gear ratio of the motor gear train applies a 105 N-m torque to the main bicycle cluster gear. 7.57 N-m corresponds to around 800 rpm from its torque rpm curve, which turns the main gear at around 57 rpm due to the 14:1 gear ratio. This torque from fig can propel a bike at Conclusion The accumulator doesnt need to be an excessively large capacity to release enough energy to propel a bike 20mph, upon releasing the energy at a pre-charge of 3200psi. But a larger accumulator is needed for the accumulator to give more than one bursts using its full capacity. A hydraulic motor can produce 81.36N-m braking torque which is an effective brake. Furthermore an accumulator can power a hydraulic motor provide an accelerating torque to propel a bicycle. However based on the weight of the design from univerty of Michigan their prototype was 13kg, they used two accumulators plus they attached it to a bracket that probably contributed to the majority of the weight.

Alexandra Bergman in Willa Cather’s O Pioneers Essay -- Willa Cather O

Alexandra Bergman in Willa Cather’s O Pioneers Works Cited Not Included Alexandra Bergman’s lack of self awareness allows others to forget that she is a woman and, at times, even human, which continuously builds the wall of isolation that surrounds her. As a result, when she reacts to situations as a woman would, rather than as â€Å"she† should, those around her don’t know what to make of it. Because she has been such a steady influence for so many years, those around her do not understand that perhaps she did have another dream besides working the land that she seems to care so deeply about. Her brothers in particular are unable to comprehend that Alexandra is a woman and was forced into the life she has lead by their father’s fantasy rather than by her own free will. Perhaps the only people who truly understand her dilemma are Ivar and Carl. Ivar is a â€Å"natural man† and a religious mystic and Carl a man who was unable to make a living from the land– neither is respected by their peers, and yet they have so me sort of insight to Alexandra’s heart that even she has failed to acknowledge. Alexandra’s walls are brought down only by love: love of her youngest brother, love of the land, and the return of the childhood love she thought was lost to her– as these loves begin to change her, her outlook on her entire life begins to change and meld into something that only those who actually know who and what she is recognize: a woman. Although Alexandra begins working the land to fulfill her father’s dying wish, no one in her early life ever realizes that perhaps she had other dreams and other wishes. â€Å"You feel that, properly, Alexandra’s house is the big out-of-doors, and that it is in the soil that she expresses herself best,† an... ...hemes fed their families, Alexandra’s hope was renewed continually by the promise of Emil’s future. When he dies, her dreams for his future are shattered, but her own are then able to be seen more clearly, without the filter of another person to care for. Ivar allows her to be herself to some extent, and more importantly can talk to her about things that only they can understand, about the land and the earth and the forces that move within it. Finally, Carl comes to his childhood friend’s rescue and reminds her that there is an entire world outside of Nebraska, and in that world she doesn’t always have to be the only one who truly cares. Through all of these men’s influences, Alexandra is in turn optimistic, hopeful, broken, and renewed. Without these changes within her self, she would never come to know exactly who and what she is– a farmer, a pioneer, and a woman.