The US Correctional System Essay Example for Free

The US Correctional System Essay When it comes to the phrase â€Å"being behind bars,† most people get the visualization and thought of prison, our correctional facilities. When thinking of these prisons there is one big thought about it and that is time. Offenders that get sentenced to prison usually have a very long sentence over there head. The real questions for these correctional systems is how are offenders punished as well as how are they rehabilitated? People may never understand the main role of prisons, but it won’t hurt to find out. When thinking of punishment when it comes to offenders what does it really mean? Punishment is a penalty dispensed on an offender with legal system. Correctional officials and parole board members determine the context of punishment and, occasionally, its length (Stanko, Gillespie CREWS, 2004). Soon after the advancement of penitentiaries, early disciplines were frequently brutal and torturous. These punishments were flogging, mutilation, branding, public humiliation, workhouses, and exile. Flogging is being beaten with a rod or a whip. The last flogging of an offender was in Delaware, June 16, 1952. Mutilation is basically a system of particular prevention that makes it challenging or unrealistic for people to carry out fate wrongdoings. All through history, diverse public orders have cut away the hands of hoodlums and burglars, blinded spies, and maimed attackers. Blasphemers had their tongues torn out, and pickpockets endured broken fingers. Noteworthy mutilation, which incorporated cutting off the ears and splitting out the tongue, was initiated in eleventh-century Britain and encroached on pursuers who poached on regal terrains. Branding was utilized to promptly distinguish declared guilty offenders and to caution alternates with whom they may go in contact of their perilous potential. Various early disciplines were composed to mortify offenders in accessible and to permit parts of the group a chance for vengeance. The stocks and pillory were two such disciplines. In the belief that neediness was created by slowness, administrations were snappy to make workhouses outlined to inject â€Å"inclinations of industry† in the unemployed. Lastly, many criminals were banished in many societies. The French sent criminal offenders to Devils Island, and the Russians utilized Siberia for quite some time for the same reason (Schmalleger, 2008). Now days Imprisonment is the most regular illustration of discipline in the correctional framework, however the demise punishment and lesser punishments for example probation are likewise outlined to be corrective (eHow Contributor , 2013). In the philosophical level headed discussion about punishment, two fundamental sorts of speculations of discipline command: utilitarian speculation and retributive speculation. Speculations that set the objective of discipline as the anticipation of destiny wrongdoing (prevention) are for the most part pointed to as utilitarian being as how they are inferred from utilitarian theory. Past oriented speculations (hypotheses that center on the past activities of the offender) are pointed to as retributivist for the reason that they look for requital from offenders for their criminal acts (Banks , 2013). After punishment comes rehabilitation. When it comes to prisons today, does rehabilitate really mean anything and if so what takes place with rehabilitation? Rehabilitate means to restore to a former capacity (Rehabilitate, 2013) as well as intimates interior change, importance a perpetual change in qualities, demeanor, ethics, or ways of getting a load of the planet (Stanko, Gillespie CREWS, 2004). The prison framework offers a mixture of courses to accommodate restore offenders: existence aptitudes classes, drug medicine arrangements, school, work developing, and an assortment of different projects (Hillman , 2009). Rehabilitation is the essential re-socialization strategy connected with the criminal equity framework. Throughout recovery, offenders study that faithful, adjusting conduct gives more gushing and material compensates than resistant, oppositional conduct. Correctional rehabilitation improved in tandem with the ascent of the social sciences in the early twentieth century. Scholastics started going to penitentiaries with the end goal of deductive exploration. It was noted that recovery regularly had a medicinal introduction. Clinicians and psychiatrics started overseeing emotional disposition tests to convicts throughout gathering and appraisal in the early twentieth century. Jail sociologists were likewise procured to group convicts as per their behavior and needs. A mixture of directing projects was launched, incorporating gathering treatment, conduct change, and contemplation. Rehabilitation was the overwhelming correctional theory for a large portion of the twentieth century. Nonetheless, the New York State Department of Corrections led an assessment investigation of rehabilitative projects in the mid1970s. Martinson was one of the scientists who presumed that recovery did not diminish recidivism. That is, medication and help customizes outlined to re-socialized convicts were not working. Martinsons exploration started a level headed discussion that kept up into the 1980s and 1990s. Lawmakers and social traditionalists utilized his summations to development the corrective part of adjustments, while analysts and liberals debated his findings. In late years, nonetheless, the open deliberation over restoration has disappeared in light of additionally pressing correctional issues, for example climbing jail inhabitant totals, packing, and budgetary lessening (Stanko, Gillespie CREWS, 2004). Determining whether punishment or rehabilitation is more effective in reducing crime, well it can be difficult to determine. In my opinion punishment would be the most effective. For example, if a 9 year old got in trouble by getting mad and going to his room after fighting with his parents and then slams the bedroom door. Talking with the child and pretty much telling them what they did was wrong is going to help them not do it again. If the child is punished by his parents and has to open and close the door softly 100 times nonstop in a row, it would teach the child that since he did something wrong he has to pay the price of it. I know that from experience. I used to slam the door and after opening and closing it over and over countless times, I learned my lesson and never slammed a door. Here is a quoted dialogue from the movie â€Å"Shawshank Redemption† that explains why I think rehabilitation isn’t very effective. Redding: â€Å"Rehabilitated? Well, now, let me see. You know, I dont have any idea what that means.† Parole Board Interviewer: â€Å"Uh, well, it means youre ready to rejoin society† – Redding: â€Å"I know what you think it means, sonny. To me, its just a made up word, a politicians word, so that young fellas like yourself can wear a suit and a tie and have a job. What do you really wanna know? Am I sorry for what I did?† Parole Board Interviewer: â€Å"Well, are you?† Redding: â€Å"Theres not a day goes by I dont feel regret. Not because Im in here, or because you think I should. I look back on the way I was then, a young, stupid kid who committed that terrible crime. I wanna talk to him. I wanna try to talk some sense to him tell him the way things are. But I cant. That kids long gone and this old man is all thats left. I gotta live with that. Rehabilitated? Its just a bull**** word. So you go on and stamp your form, sonny, and stop wasting my time. Because to tell you the truth, I dont give a s**t (American Rhetoric: Movie Speech , 1994).† After this dialogue took place in the movie Redding’s parole decision to be released was approved. So honestly I really don’t think that rehabilitation does any good in trying to change offenders’ personal behavior so that they will not commit any future crimes. Like Redding said, it’s just a made up word. Our US Correctional system can be very complex when it comes to punishment and rehabilitation. Flogging, mutilation, branding, public humiliation, workhouses, and exile were early punishments that took place soon after penitentiaries were created. Now day’s imprisonment is the main role for punishment. Existence aptitudes classes, drug medicine arrangements, school, work developing, and an assortment of different projects are all associated with rehabilitation now days. Rehabilitation is the essential re-socialization strategy connected with the criminal equity framework. When it comes to reducing crime some people think that punishment is more effective than rehabilitation and others think that rehabilitation is more effective. We may never know exactly which one is more effective to help reduce crime but in my opinion punishment would me the most effective. It teaches the offender a lesson. Don’t get me wrong, rehabilitation can and does help for certain offenders, but for most offenders now days, sometimes it just takes some discipline to help turn them back around. References American Rhetoric: Movie Speech (1994). The shawshank redemption [Web]. Retrieved from http://www.americanrhetoric.com/MovieSpeeches/moviespeechtheshawshankredemptionparoleboard.html Banks , C. (2013). Criminal justice ethics. (3rd ed., p. 105). Tousand Oaks, California: Sage. Retrieved from http://www.sagepub.com/upm- data/5144_Banks_II_Proof_Chapter_5.pdf eHow Contributor (2013). Role of the correctional system. Retrieved from http://www.ehow.com/about_5087269_role-correctional-system.html Hillman , S. (2009, April 17). Do us prisons really rehabilitate criminals?. Retrieved from http://www.helium.com/items/1418951-prison- systems-rehabilitation Rehabilitate. In (2013). Merriam-Webster. Retrieved from http://www.merriam- webster.com/dictionary/rehabilitate Schmalleger, F. (2008). Criminal justice today: An introductory text for the 21st century . (11th ed., pp. 451-453). Upper Saddle River, NJ: Pearson Prentice Hall. Retrieved from http://content-crj.kaplan.edu/CJ101_1201B/images/product/M13_SCHM4091_11_SE_CH13.pdf Stanko, S., Gillespie, W., CREWS, G. A. (2004). Living in prison : A history of the correctional system with an insiders view. (pp. 10, 54-55). Westport, Connecticut: GREENWOOD PRESS. Retrieved from http://ehis.ebscohost.com.lib.kaplan.edu/eds/ebookviewer/ebook/nlebk_125608_AN? sid=a8ee54a8-197e-4b9a-8e17- [emailprotected]vid=2

The Propulsion System Engineering Essay

The Propulsion System Engineering Essay The propulsion system with respect to this application can be defined as the system which provides vehicle motion. Thus, this project involves the design of a system for efficient power generation and transmission of power from power plant to the driving wheels with minimum power train losses. All design features must comply with the shell Eco-Marathon Asia 2010 rules and regulations [1] Main objectives Selection of a suitable energy source to power the vehicle Overall system design Stock selection and design of components Detailed analysis and optimization of each sub system for maximum fuel efficiency CAD modeling and detailed drawing Verification of selected and designed components through calculation and suitable simulation software Final performance estimation All design features must be approved by shell Eco-Marathon organizers Parts quotation 1.2 About the competition The principle of the Shell Eco-Marathon is simply to design and build the most fuel efficient vehicle while producing the fewest emissions. [1], [30] Teams can enter two main categories: Futuristic prototypes These are streamlined vehicles where the primary design consideration is reducing drag and maximizing power train efficiency. This category has fewer restrictions. [1] Urban Concept vehicles These are built to more conventional 4-wheel roadworthy criteria. [1] Design requirements and other rules related to the propulsion system are listed in Appendix F 1.3 Competition category and energy source selection After few days of research and discussion considering time, cost and expertise of team, it was decided to compete under the prototype category with an internal combustion engine running on ethanol as the power plant. CHAPTER 2.0 LITERATURE REVIEW 2.1 Introduction This literature review provides details on past endurance vehicles and the latest developments in the area of fuel efficiency, alternative fuels and future propulsion systems. Articles and reports were found related to vehicles designed and developed mainly for Shell Eco-Marathon and SAE Supermileage competitions. 2.2 The world record The most fuel efficient car in the world, PAC Car II designed and developed by ETH Zurich (Swiss Federal Institute of Technology) was powered by a Hydrogen fuel cell and it had a record of 12600 Miles per Gallon (US) during the Shell Eco-Marathon, France in 2005 [3]. This clearly indicated the level of competition, amount of potential for fuel efficiency and alternative fuels. 2.3 Ethanol as vehicle fuel Articles [4] on ethanol combustion and conversion of gasoline engines were found which provided detailed practical explanation. An ethanol powered car engineered by French high school students from Lycà ©e La Joliverie had achieved the best fuel efficiency at the European Shell Eco-marathon 2006, winning the race at the Nogaro auto racing circuit in southwest France by travelling 2885 kilometers per liter of gasoline equivalent. It also took the Climate Friendly prize for producing the least greenhouse gas emissions. [6] Currently ethanol E85 (85% ethanol) powered vehicles are produced by leading automotive manufacturers such as Ford, Chevrolet, Chrysler, Toyota, Nissan etc [8] 2.4 Engine and drive train Vehicle designed and built by Alerion Supermileage team from Laval University of Quebec, Canada won the grand prize of the Shell Eco-Marathon Americas 2010 recording 1057.5 kilometers per liter. This vehicle consisted of an internal combustion engine. The Dalhousie University team had used the Honda GX35 engine for their vehicle with a direct drive transmission system for Shell Eco-Marathon Americas in 2008/2009 which travelled 332.8 km/l gasoline [5]. Experimental values obtained by dynamometer testing for the GX35 engine were also published. [2] 2.5 Fuel delivery systems Most endurance vehicles in previous competitions had mechanical fuel pumps to pressurize fuel. The Dalhousie team used a pressurized fuel system in 2008/2009 which yielded successful results. Fuel injection systems are known to be more efficient than carburetor systems since there is more control over the spray of fuel. 2.6 Intake and exhaust system The internal combustion engines and fluid mechanics online lecture notes published by the Colorado State University provided basic explanation about intake/exhaust tuning. Current developments in this field are related to variable valve timing. Fiat was the first automotive manufacturer to patent a variable lift system. Developed by Giovanni Torazza 1960, the system used hydraulic pressure to vary the fulcrum of the cam followers (US Patent 3,641,988). The hydraulic pressure changed according to engine speed and intake pressure. [43] After continued improvement, a system with variable valve timing, two stage valve lift on the intake valves and variable timing of the exhaust valves was developed by Porsche in 2009. [40] In 2010, Mitsubishi developed and started mass production of the 4N13 1.8 L Diesel Overhead Cam Inline 4 cylinder engine. This is the first passenger car with a diesel engine that features a variable valve timing system. [39] 2.7 Latest trends in fuel efficiency There is much research and development in the area of hydrogen fuel cells and hybrid systems. Although the principle of the fuel cell was discovered in 1838, it has not been a popular topic until recent years. Currently, hybrid systems and hydrogen fuel cells are considered the future of vehicle propulsion systems. CHAPTER 3.0 ENGINE THE SYSTEM POWER PLANT 3.1 Introduction A small four stroke gasoline engine was required to be selected and modified for ethanol combustion with maximum fuel efficiency. 3.2 Fuel Ethanol E100 The main idea behind selecting ethanol as the fuel for the engine is that ethanol has a high octane value (Higher auto ignition point). Therefore the engine will not knock at higher compression ratios. [8], [4] It is also a renewable fuel produced by corn, sugar cane etc and although controversial is regarded as generating less toxic emissions. [8] 3.3 Stock engine selection Main specification guidelines set in order to select few potential engines that can be used for the system: Engine type: Air cooled, four stroke, single cylinder petrol engine Displacement: 35 to 50 cm3 Power Output: Maximum Mass: Minimum Table 1.0: Specification guidelines for selection Adhering to the set guidelines (refer table 1.0) few potential engines were selected. Scooter engine, 139QMB, [9] 350R/S 35cc Robin/Subaru 4-Stroke engine used for bicycles, [10] Honda GX35 mini 4 stroke used in lawn mowers, [11] Gasoline engine (142F) manufactured and supplied by Shandong Huasheng Zhongtian Machinery group CO.LTD, [12] [Detailed specifications for these engines are given in appendix C] 3.3.1 Parametric study Main parameters considered for this study were specific fuel consumption, mass, ease of modification, availability, versatility and reliability The fuel efficiency of an engine is directly related to the brake specific fuel consumption. [13] During the autumn semester, the drive train was assumed to be 100% efficient and mass of car without engine was estimated as 330lbs. These values were only used for comparing engines. The miles per gallon values were estimated using the Bowling and Grippo program for various BSFC values. [7] The estimates for coefficient of drag, frontal area, tire inflation pressure, vehicle weight were obtained from other team members in charge of each sub assembly. Program inputs Coefficient of drag 0.13 Frontal area (Square feet) 8.04 Vehicle miles per hour (MPH) 18 Vehicle weight in lbs 330 Tire inflation pressure in psi 80 Engine Brake Specific Fuel Consumption (gal/hr-hp) Inputs from 0.01 to 0.25 Drive train horsepower loss Assumed 0 for engine comparison Table 2.0: Bowling and Grippo program inputs (Refer Table 6.0 in Appendix D for results) Figure 1.0: Estimated MPG vs. BSFC The specific fuel consumption of the engine should be a minimum to obtain high miles per gallon of fuel (from figure 1.0). The engines selected were further short listed considering the information available and ease for modification. 142F Gasoline engine: Brake specific fuel consumption = 480 g/kW-h Density of gasoline = 2790.38 g/gal, [15] 480 g/2790.378 g/gal = 0.1720 gal 0.1720 gal/1.341 hp-h BSFC = 0.1283 gal/hp-h Honda GX35 Brake specific fuel consumption = 360 g/kW-h This value in gal/hp-h = 0.0962 gal/hp-h Miles per gallon was estimated (assuming no power loss in drive train) for each engine while considering the mass of each engine. Estimated weight of vehicle without engine = 330 lbs Weight of vehicle with 142F engine = 335.5 lbs, this gives an estimated MPG of 790.84. Weight of vehicle with Honda GX35 = 333.8 lbs, this gives an estimated MPG of 1058.84. [7] Figure 2.0: MPG for 142F and GX35 engines Although miles per gallon value would be lower when drive train power loss is considered, the engine was compared assuming a 100% efficient drive train. These calculations are based on gasoline fuel for engine comparison purposes. Study results clearly indicate that the Honda GX35 is the most suitable engine for this system and also considering the reliability factor of Honda further proves that this engine should be selected for this application. 3.4 Honda GX35 Main advantages of Honda GX35 engine [11] Lower brake specific fuel consumption Mass is almost 2 kg less than 142F Better reliability and it has been improved over the past 10-11 years. Over Head Cam engine: Carrying out modifications on the cylinder head is easier. 360o inclinable The only disadvantage is that it consists of a carburetor. A fuel injection system would have been more fuel efficient but electronic fuel injection would also require an Engine management system and alternator which would add more weight to the vehicle. Therefore weight is less with carburetor. Performance curves C:Documents and SettingsPulsaraDesktopFYP RESEARCHcurve_GX35.gif Figure 3.0: Performance and fuel consumption curves [11] Basic calculations Clearance Volume (Stock GX35) Swept Volume = 35.8 cm3, Compression ratio, rc = 8:1 Compression ratio = Total Volume, (Vc+Vd)/Clearance Volume, Vc Clearance Volume, Vc = 5.114 cm3 Brake mean effective pressure (BMEP), (Stock GX35) Maximum power output = 1.3 HP at 7000rpm L is displacement in liters, L = 0.0358 l BMEP = 67.44 lbf/in2 Calculation of specific fuel consumption with ethanol without any system modifications Fuel NCV (KJ/l) NCV (KJ/gal(US)) Gasoline 31627.84 119724.42 Ethanol 21229.48 80362.34 Table 3.0: Net calorific values by volume [1], [15] BSFC with ethanol 0.0962 gallons of gasoline = 119724.42 x 0.0962 KJ = 11517.45 KJ Therefore BSFC of Honda GX35 engine with ethanol fuel = 0.1433 gal/hp-h (GX35 specifications in appendix C). 3.5 Modifications Figure 4.0: Engine modifications 3.5.1 Mandatory modifications for ethanol combustion Carburetor modification Main jet changes Since the energy density of ethanol is lower than gasoline, the fuel/air ratio should be increased. The main jet orifice can be bored out to increase the size of the orifice by around 30% of the original size. The air/fuel ratio for ethanol combustion should be 10.07:1. [4], [1] Idle orifice changes When the throttle plate is at idle position, the air/fuel mixture is only allowed to enter the manifold through the idle orifice. The idle mixture screw could be loosened or orifice could be bored out to increase the size by 30% in order to provide sufficient ethanol to keep the engine running at idle speed. [4] Overall engine and piping system Ethanol is a strong cleaning agent and has the ability to degrade certain engine parts such as, natural rubber, plastics, and even metals over time. Therefore, all rubber and plastic components should be replaced by synthetic material. [4] It is recommended to use neoprene hoses for the fuel delivery system. [4] Durability of various plastics: Ethanol vs. Gasoline in table 3.1in appendix D. 3.5.2 Modifications for maximum fuel efficiency Compression ratio alteration This is discussed with detailed analysis in chapter 5.0 Intake and exhaust optimization This is discussed with detailed analysis in chapter 6.0 Starting system An electric starter would be installed which would enable the driver to turn off the engine and coast after reaching a particular speed and restart later with ease. Choke A manually controlled choke is better for ethanol engines and especially for this competition. Therefore if the engine is equipped with an automatic choke; it can be adapted for manual control using a manual choke conversion kit. CHAPTER 4.0 COMPRESSION RATIO ALTERATION 4.1 Introduction This is the main advantage of using ethanol as fuel. The compression ratio can be increased up to 16-20:1 without engine knock. [20] Increasing the compression ratio increases the thermal efficiency of the engine but it should only be increased to an extent to which the engine could withstand the pressure and temperature. Methods to increase the compression ratio [21] Cylinder head and block can be shaved by milling (planning) the surfaces. Modify or change the piston head. Inlet conditions (High pressure, temperature etc) Reduce gasket thickness 4.2 Analysis For this analysis, the combustion chamber of the engine was assumed to be cylinder shaped r = Bore/2 = 1.95cm X VC (Stock) = 5.114 cm3 à Ã¢â€š ¬r2 X = 5.114 X = 0.428 cm Milling the head/block or reducing thickness of the gasket would reduce X which would result in a smaller clearance volume, VC. A smaller clearance volume results in a higher compression ratio which also generates more power. Valve clearance for Honda GX35 This is the maximum distance the valve travels beyond the engine head. Intake Valve clearance Exhaust Valve Clearance 0.08 +/- 0.02mm 0.11 +/- 0.02mm Table 4.0: GX35 Valve clearance [17] The value of X after modifications must be greater than 0.13 mm to avoid valve/piston collision. Let Y be the amount of head/block milled or reduced from gasket X = (4.28 Y) mm There is no direct theoretical relationship between horsepower and compression ratio but the Bowling and Grippo program provides a rough estimate which was tabulated in table 6.1 in appendix D. [7] For specific new fuel consumption Tabulated results can be found in Table 6.1 in Appendix D Figure 5.0: Compression ratio vs. reduction in combustion chamber height (Y) Figure 5.1: Estimated engine HP vs. reduction in combustion chamber height (Y) Figure 5.2: BSFC vs. reduction in combustion chamber height (Y) Figure 5.3: Estimated miles per gallon vs. reduction in combustion chamber height (Y) From research it was found that the compression ratio could be increased to 16-20:1 with ethanol fuel without knock problems but there was no credible information on how much compression the engine could withstand. Therefore, it was specified to increase the compression ratio only up to 12:1. This increase in compression ratio would result in an increase of 55 miles per gallon (US) (Refer figures 5.0, 5.1, 5.2 and 5.3) 4.2.1 Engine cyclic analysis Figure 6.0, P-V diagram for naturally aspirated Spark ignition engine [25] Inlet conditions: Pressure (P) = 1 bar, Temperature (T) = 303 K, Ideal Gas constant (R) = 287 J/kg. K, Ratio of specific heats (ÃŽÂ ³) = 1.4, CV = 717.6, For perfect gas, Where, is the total mass of charge mixture From fuel consumption calculations using net calorific values: Fuel /Air ratio (FAR) of Ethanol = 1.49 x FAR of gasoline FAR (Ethanol) = 1/15 x 1.49 = 0.0993 , where From 1 2 (Refer figure 6.0) Isentropic compression From 2 3 (Refer figure 6.0) Constant volume heat addition Energy density of Ethanol = 30 MJ/kg Most small engines have thermal efficiencies between 40 and 45%. Therefore with a compression ratio of 12:1, conversion efficiency (Formation and combustion) can be assumed to be 45% to obtain an overestimate of the increase in pressure and temperature. [22] Above calculations were repeated for the original compression ratio (8.0:1) of the stock engine which gave the following results C:UsersPMGDesktopFYP RESEARCHT0512e0v.gif Figure 7.0: Thermal efficiency increase with increase in compression ratio, [23] Assuming a conversion efficiency of 40% and an air/fuel ratio of 15:1 Therefore, the peak in cylinder pressure has been increased by a factor of 1.64. This factor is also the factor of increase in force on piston, head, valves etc. Brake mean effective pressure (BMEP) is a valuable measure of the capacity of an engine to do work and is independent of displacement (Size of engine). [24] The BMEP of the stock engine was 67.44 (from calculations under parametric study). Therefore, increasing the compression ratio has increased the capacity of the engine to do work significantly. CHAPTER 5.0 INTAKE AND EXHAUST OPTIMIZATION 5.1 Introduction A pressure wave is created when an intake or exhaust valve is opened/closed. The wave propagates through the pipe at the speed of sound. When this wave encounters a change in cross sectional area, such as the end of the pipe, a wave of opposite sign will be reflected which would travel back towards the port. Based on the time taken for this wave to return to the valve and also considering the open/close durations of the valves, the optimum length for the pipe can be calculated. This would increase the volumetric efficiency of the engine. [16] 5.1.1 Optimum intake pipe length Experiments have revealed that there is a significant gain in volumetric efficiency when the reflected compression wave returns when the piston is at a crank angle of 90o. At this point the piston would be moving at maximum speed. Matching the time taken for the wave to return with engine speed, the required length of the pipe can be found. [16] Velocity of wave = Distance/Time, (where distance = 2L) Time = 900/ RPM (revolutions/minute)(minute/60s)(3600/revolution) = 15/RPM [16]C:Documents and SettingsPulsaraDesktopFYP RESEARCHfluid0{image1}.gif Where c is the speed of sound which depends on the temperature Where = Ratio of specific heats R = Ideal gas constant T = Temperature 5.1.2 Optimum exhaust pipe length At blow down (exhaust valve opens), a compression wave is propagates through the pipe and when it meets the end of the pipe an expansion wave returns back to the port. Experimentally it has been revealed that the optimum position of the piston when the wave returns is 120o. At this position the exhaust gas can be scavenged from the combustion chamber efficiently. [16] Time = 1200/RPM (360/60) = 120/RPM [16]C:Documents and SettingsPulsaraDesktopFYP RESEARCHfluid0{image4}.gif Graphs were plotted using these formulae A detailed calculation also considering the valve timing of Honda GX35 could be found under detailed calculations (5.2) Figure 8.0: Intake pipe length vs. engine RPM at different temperatures (Tabulated results in table 6.2 in appendix D) Figure 8.1: Exhaust pipe length vs. engine RPM at different temperatures (Tabulated results in table 6.3 in appendix D) 5.2 Optimum pipe length calculations in detail 5.2.1 Intake pipe length considering valve timing Intake valve opens at 10o before top dead centre (BTDC) and intake valve closes at 57o after bottom dead centre (ABDC). [18] Duration of 247o , [18] Intake valve opens once every two revolutions. Therefore (360 x 2 247) o = 473o After closing, the intake valve would open again after 473 crank angle degrees 473o = Speed of sound at an intake temperature of 30oC Ratio of specific heat, ÃŽÂ ³ = 1.4 at 30oC Distance travelled is two times the pipe length, Therefore, The optimum pipe length for GX35 engine to run at 5100 RPM is 2.705 m Due to the space constraint of the engine compartment pipe length can be shortened by a factor of four, making it 0.677 m in length. By this method, the wave would travel up and down the pipe four times before the intake valve opens again. Although the effectiveness would be less, it would still arrive at the correct time to force more air into the cylinder. Using this result a custom intake pipe was designed with a length of approximately 0.5 m leaving the remaining 0.177 m for intake runners, carburetor, etc 5.2.2 Exhaust pipe length using valve timing There are various methods and theories used for calculating the exhaust pipe length. The intake and exhaust can be treated separately to find the optimum length for each pipe and also both can be treated as one system during valve overlap to gain an added advantage during the overlap period. Method 1 (Considering exhaust system only) The reflected pulse could be set to arrive at the engine just as the exhaust valve starts to open, which would help to expel the exhaust gas without using up excess energy. Exhaust valve opens at 48o before bottom dead centre (BBDC) and exhaust valve closes at 28o after top dead centre (ATDC). [18] Duration of 256o, [18] Port opens/closes once every two revolutions. Therefore, exhaust valve opens 464 crank angle degrees after closing Speed of sound, c at the exhaust will depend on the exhaust temperature Thermodynamic calculations were continued from point 3 (Refer Figure 6.0) in order to calculate the temperature at blow down. , From 3 4 Isentropic expansion This length can be shortened by a factor of four allowing the wave to travel up and down four times before the valve starts to open, which gives 1.163 meters. Method 2 (Considering valve overlap period) If the reflected expansion wave reaches the opened exhaust valve just before closing but after the intake valve opens, the expansion wave will travel across the cylinder (since effective cylinder volume is small near TDC) through the intake port up to the intake atmosphere. This would result in an increased aspiration. Intake/exhaust valve overlap period of 38o Blow down shock wave leaves at 48o BBDC and the expansion wave must be set to return at around18o ATDC. [18] This gives duration of 246o, [18] Exhaust valve opens once every two revolutions. To obtain maximum volumetric efficiency by gaining advantage of the valve overlap period the exhaust pipe should be 2.46 meters in length This can be shortened by a factor of two which would make the wave travel up and down twice before making use of the valve overlap period but this method may not be effective since the exhaust port will be open when the valve returns for the first time. 5.3 Custom parts in the intake/exhaust system Intake pipe This pipe was designed considering the calculation results (figure 2.0) and compartment space Length is approximately 0.5 meters, (CAD drawing in appendix A) Exhaust pipe This was designed considering the calculations (figure 2.1), compartment space and also the Shell Eco-Marathon rule which states that exhaust should be evacuated outside the vehicle but the pipe should not be longer than the body Length is approximately 1.5 meters, (CAD drawings in appendix A) Velocity stack Figure 9.0 Inlet flow [19]This is a pipe with a curved inlet which should be fixed to the end of the intake pipe. This would give a smoother flow of air into the intake pipe which would result in better atomization of fuel in the carburetor. Also this allows the full cross section of the intake pipe to be used whereas without a curved inlet, the flow area would be reduced due to the sharp entry. Therefore the velocity stack helps to aspirate more air into the system. [19] (CAD drawing in appendix A) 5CHAPTER 6.0 FUEL DELIVERY SYSTEM 6.1 Introduction The basic function of this system is to deliver the fuel to the carburetor. In regular vehicles, either mechanical or electric fuel pumps are used to pressurize and drive the fuel into the system. Stock GX35 engine uses gravity to pressurize the fuel when used in lawn mowers. The Shell Eco-Marathon rules state that electric fuel pumps are not allowed. [1] Therefore the possible methods would be: Using a Mechanical fuel pump Using gravity Pressurized fuel delivery system using compressed air 6.2 Selection and design A mechanical pump would have to be powered from the engine output, which would result in an additional load on the engine. This would result in a reduction in specific fuel consumption. The pressure due to height may not be large enough due to the space constraint in the engine compartment if gravity is used. Also, the shell fuel tank could be pressurized up to 5 bar which makes the pressurized system ideal for this application Figure 10.0: PRESSURIZED FUEL DELIVERY SYSTEM LAYOUT Valve to drain the fuel (Shell requirement) Solenoid cut off valve Pressure control valve A 1.5L pop bottle is used to store air at high pressure and air is regulated using a pressure control valve to control the pressure of air entering the fuel tank. This air at high pressure is used to push the fuel through the system. Pressure gauge is positioned close to the fuel tank to indicate the pressure of air entering the fuel tank. An air pump (hand held or foot pump) can be used to pump in air through, the valve stem (No return valve). 1.5 L pop bottles are rated at 72 psi, therefore it is recommended to pump the bottle to approximately 60 psi. 6.3 Advantages of this method No extra load on the engine to drive a mechanical pump Less weight Low cost Also, this is a proven method which has been used in successful endurance vehicles in past competitions. [2] (CAD drawings can be found in appendix A) Figure 10.1: Screenshot from CAD model showing the fuel delivery system CHAPTER 7.0 DRIVE TRAIN 7.1 Introduction The vehicle consists of three wheels, two in front and one at the back. The vehicle was designed to be a rear wheel drive and a chain is used to drive the wheel. Design and selection of transmission system and parts, gear ratio calculations, overall system layout and basic stress analysis is discussed in this chapter. 7.2 Transmission system There were few potential transmission concepts that could be used Continuously Variable Transmission (CVT). [26] Derailleur [27] Manual two/three speed gear box Direct drive system [2] CVT is known to be more efficient than a manual gear box but after further review it was found that CVT is less efficient at low speeds. [41] Derailleur system is highly efficient and simple but previous vehicles with this system had problems with the chain slipping out of the sprocket during gear change. [2] Although a manual gear box is well suited for this system, it would add extra weight and also more moving parts results in additional power loss. Therefore a direct drive system with one gear ratio was selected as the most suitable transmission system. Main reasons behind selecting direct drive transmission system Honda GX35 has relatively flat curves for torque, power and fuel consumption. The fuel consumption curve is almost flat from 3000 to 6000 RPM. Therefore the engine can run at a wide range of speeds and still supply adequate power with the same fuel consumption. (Refer figure 3.0) A manual gearbox would add extra weight and benefits of it would be negligible due to the linear performance curves. 7.3 System layout Few drive train system layouts were drawn in order to allocate space for each part. The most suitable layout was selected and modified accordingly. FUEL TANK CLUTCH Figure 11.0: Selected layout (Initial concept layouts in Appendix F) Figure 11.1: Screen shot from CAD model of the propulsion system showing the layout (Overall CAD assembly and exploded drawings in appendix A) 7.4 Gear ratio Since a direct drive system was selected, the drive train would have one fixed gear ratio from engine to rear sprocket. An overall gear ratio of 16:1 was chosen and calculations were carried out to verify that this ratio is suitable for our application. 7.4.1 The torque required at the rear wheel to move vehicle from rest Rolling resistance, Where, = Coefficient of rolling resistance m = Total mass of the vehicle g = Acceleration due to gravity Coefficient of rolling resistance for pneumatic tires on a dry surface can be approximated by the following equation Where, P = Tire Pressure (bars) U = Vehicle velocity (km/h) Overall estimated mass of the vehicle = 140 kg Maximum tire pressure = 85 psi (5.8605 bar) Rear wheel diameter = 0.508 m Torque required to move the vehicle = Rolling resistance x driving wheel radius The efficiency of the drive train w

Essay --

L’Chaim Bravery can be defined in many different ways, but it is not usually defined by an entire country. During World War Two, the entire country of Denmark decided that they would not submit to Hitler and aid him in the extermination of the Jewish people, or â€Å"The Final Solution.† Denmark is the only example of a country that was unwilling to succumb to the Nazi ideology and actively resist the regime. Through various resistance movements and strikes, the Danes were able to communicate to the Germans that they were not welcome and that their principles would not be accepted. The country of Denmark is situated directly over Germany. Though it was not considered a major conquest by Hitler, it was valuable due to its location near Norway. The country of Denmark was considered so unimportant that the Germans considered excluding it from â€Å"The Final Solution† during the Wannsee Conference. The â€Å"Jewish problem† in Denmark seemed very insignificant compared to other countries considering that there were only seven thousand and five hundred Jews to the four million Danes. Regardless, Denmark was occupied by the Germans on April 9, 1940. The German influence on the Danish government and people was very small. The Danes were able to maintain their own government with the Germans only dictating the foreign policies. The people were hardly affected as well, including the Jews. The Jewish people were able to continue with worship services and daily life as usual. The Jewish people were also exempt from wearing the Star of David, registering as Jews, or leaving their houses and relinquishing businesses. One of the main opposers of the German occupation was the king of Denmark himself, King Christian X. From his unarmed, unescorted rides t... ...s. Theresienstadt was liberated by the Soviets on May 9, 1945 after the camp was handed over to the International Red Cross. Around fifty Danish people died during the internment in the concentration camp. Around four hundred and fifty survived. Denmark has been honored for their bravery by several different monuments, such as a monument in Israel of a boat that was done on the twenty-fifth anniversary of the rescue. There is also a boat that was used for the transportation to Sweden in the Holocaust Memorial Museum in Israel. Copenhagen has a monument with a large inscription in both Danish and Hebrew that was a gift from the Israeli people. The autumn of 2013 marked the seventieth anniversary of the rescue of the Danish Jews. May we always remember the courage of a country devoted to seeing past the labels placed on people and seeing them as individuals instead.

My Philosophy Statement Essay -- Philosophy of Education Teaching Essa

My Philosophy Statement Coming from a family of educators, I have always been aware of the love and importance of learning. Growing up I thought I wanted to be a Marine Biologist and was even accepted at Coastal Carolina to study this field. After much deliberation, I realized that what I really wanted to do was teach. In high school, I had the opportunity to work with children through the Eagle’s Nest Club and my Spanish class and knew this is what I wanted to do. My opportunities through these two organizations gave me experience with elementary students. This is what I have chosen to do. I plan to pursue a degree in elementary education and add certification for pre-k and special education. Again, coming from parents of educators, I know how important education is and I also know how important it is to consider the individual child and the baggage they bring with them. Some students come to school with a background that has provided plenty of stimulus and are ready to learn. Others come with terrible childhood and family histories and struggle to survive, much less have the pre-readiness skills to learn. My goal is to teach early childhood students and make my classroom a place where all children, those from impoverished and abusive homes to those with well to do and stable homes, have the same stimulation and opportunity to learn. Even though my goal is to teach early childhood, my degree will be through K-8. Consid...

Even Cowgirls Get the Blues - Within the Guidelines of Feminist Discour

Even Cowgirls Get the Blues - Within the Guidelines of Feminist Discourse Surprisingly, in spite of being a male from the 1970s, Tom Robbins has written a novel, Even Cowgirls Get the Blues, supporting feminism. This is a term that most of us are familiar with; yet, what is feminism? The Routledge Critical Dictionary of Feminism and Postfeminism defines "feminist purpose" for us as "an active desire to change women's position in society" (Brown, Meginis, and Bardari, 231). In order to discuss feminism in terms of Robbin's novel, we need to know what feminist theory means when applied to literature. According to Jonathon Culler, a professor of English and comparative literature at Cornell University and author of Literary Theory: A Very Short Introduction, feminist theory is based on "women writers and the representation of women's experience" (124). Naturally, Robbins does not fit the first category of being a woman author since he is male. Nevertheless, his novel Even Cowgirls Get the Blues fits within Culler's description of feminist novels that "cha mpion the identity of women [and] demand rights for women" (123-124). Robbins does this through the development of his female characters and the plot. Robbins produces a strong female character named Sissy Hankshaw whose beauty is marred by enormous, somewhat useless thumbs. In order to become independent, Sissy leaves the repressive atmosphere in her southern home by participating in the male-dominated phenomenon of hitchhiking as embodied by Jack Kerouac in On the Road. Sissy herself says in reference to her hitchhiking, "I'm the best there is, ever was or ever will be" (53) and develops a national reputation as a hitchhiker. She even competes with and befriends the... ... Jonathan Culler. Literary Theory: A Very Short Introduction. Oxford: Oxford University Press: 1997. Karl, Frederick R. Critique of Tom Robbins. Contemporary Literary Criticism. Ed. Roger Matuz. 233 vols. Detroit: Gale Research Inc., 1990. Perso, Jeffrey. "The Lost Highway." MetroActive Travel Online. 1 May 1997. 9 April 2001. http://www.metroactive.com/papers/cruz/05.01.97/hitchhike-9718.html. Robbins, Tom. Even Cowgirls Get the Blues. New York: Bantam, 1976. Siegel, Mark. Critique of Tom Robbins. Contemporary Literary Criticism. Ed. Roger Matuz. 233 vols. Detroit: Gale Research Inc., 1990. Travis, Cheryl Brown, Kayce L. Meginnis, and Kristin M. Bardari. "Beauty, Sexuality, and Identity: The Social Control of Women." Sexuality, Society, and Feminism. Ed. Cheryl Brown Travis and Jacquelyn W. White. Washington: American Psychological Association, 2000.

Business Management Motivation

Motivation is the willingness to exert high levels of effort toward organizational goals, conditioned by the effort's ability to satisfy some individual needs (Robbins, 168). For some business analysts, employee motivation is a good way to increase productivity in an organization. When people get motivated, they will have a reason to put more efforts on what they are doing. Motivation is a crucial management tool in lifting the organization's work force's ability. There are many different ways to motivate employees. Employers can motivate their workers as individuals, groups, teams, or the organization as a whole. Motivation takes forms like offering rewards, improving working conditions, or employee recognition. However, which approach should employers try? Team-based reward systems have been raised as an issue in work management areas. Many people prefer team-based reward systems to an individual approach. San Diego Business Journal, issued on Oct. 6, 1997, published an article titled â€Å"Team-Based Productivity Incentive System.† This article summarized the ideas that supported the team-based approach. The author, Bob Harrington, opposed the individual reward system. As he stated, individual reward systems create unnecessary competition and reduce cooperation between employees. It also reduces creativity because employees will only do what is necessary to get rewarded. Moreover, Harrington said team-based incentives influence individuals to work well together and cooperate with one another. No longer are employees and management measured purely against financial information. Instead, outstanding performance is based on a combination of items that measure the strategic objectives of the corporation. This paper will see if the team-based incentive systems are the best approach for business environments as Harrington discussed. Medical insurance and educational opportunities, among others are all common benefits in compensation programs for many manufacturers. Many people argued that these benefits attract and retain employees, but have little to do with work performance. Some also believe that if these benefits are spread out among workers in general, these kinds of work incentives will not guarantee good performance. Well Pay vs. Sick Pay is an example of how an incentive program reinforces wrong behavior and reduces productivity. Manufacturers with incentive systems that reward employees for achievements and growth can increase their competitiveness and profitability in today's global market. Yes, it is true that organizations need to have incentive systems to satisfy their work force. Team-based incentive systems such as gain sharing, profit sharing, etc., become increasingly popular in work environments. People now are required to work as a team, and altogether help each other to achieve an objective. Your work is my work, and your responsibility is mine. People will become more cohesive as working in a group or a team. Team-based incentives offer several advantages. However, I do not totally agree with Harrington that individual incentive systems do not have any good influence over workers' performance. Some people are extremely successful when they work on their own. People, who are raised in an individualistic culture, might not benefit from working in a group. So, individual incentive systems do play an important role in increasing a work force's productivity as long as the employers know how to use this reinforcement system properly. If organizations set a standard to measure individual achievement and reward that individual on what he (she) perform, then, the individual incentive system might work as well as the team-based one. Moreover, managers need to realize that team-based incentive systems might cause Social Loafing effect in the work force – the tendency for individuals to expend less effort when working collectively than when working individually (Robbins, 260). Motivations are necessary in a working environment to increase the productivity of the work force. Reward systems must create a win-win situation for employees and employers. Team-based incentive systems might work very well and are a preferred process for many organizations in today's work market; however, managers should adopt individual incentive systems in many cases, when employees are more skillful, efficient, and effective as working individually. The major purpose of the incentive system is to motivate and organize employees.

Leaders Make a Real Difference in an Organisation’s Performance Essay

Within these qualities over history great leaders have developed detailed theories that are constantly being utilized within successful corporations today. Amongst these are Trait theory, Behavioural theories and also the Situational contingency theories that were used to represent successful leadership qualities. Great leaders become highlighted in times of oppression, utilizing their talents to move forward and have solid control of their organisations, in turn developing positive organisational performance. Through past generations leadership had developed to the ultimate success it is today. Through multiple theories, leadership has moved to the point where it now has a factual impact on organisations performance. The contemporary management theories are used in numerous ways of motivating, creating opportunity providing inspiration and resulting in a definite increase in organisational performance. This is evident in today’s society, through a minimal view of coaching sporting teams to the operations of large corporate groups such as Wesfarmers. Creating opportunity, Throughout history, it has been clearly evident that a great leader’s input shall reflect with a great performance output, thus developing opportunities for individuals to accomplish their maximum potential. â€Å"Leaders create opportunity for individuals within their sphere of influence† (urbanfoot. ca, 2009), opportunity being a set of circumstances that makes it potentially possible to achieve anything from extrinsic to intrinsic rewards. This creation of opportunity manifests itself across the globe in large and small organisations. In contemporary society it is shown by leaders within sporting clubs, the success of the best AFL clubs are built on a hierarchy of leaders, club captains, coaches, and trainers. They are all striving to create opportunity for young potential players. Essendon football club’s great success over the past numerous decades have been because of the major influential leadership role James Hird has played within the club. James Hird leading his club by being captain through two premierships and is now today still leading the club by coaching. His career of captain assisted with the creation the opportunity for the club leaders today and now he is continuing his leadership role by coaching the team, it is evident with his club involvement there is a definite outcome of organisational performance. As well as leading through creating opportunity, great leaders strive to inspire others within their environment. Inspiration, Leaders aim to inspire individuals within their vicinity to pursue the outcome of organisational performance. This constant attempt to provide inspiration is strongly shown by our world’s best leaders that are driving the powerhouse of our world’s economy. Steve Jobs, co-founder of Apple, Phil Knight, founder of Nike and Richard Branson founder of Virgin Group, these individuals are amongst many others that are part of the world’s most inspirational leaders. These people have founded some of the world’s biggest corporations by their profound ability inspire. Richard Branson went from developing a school newspaper called Student to operating one of the world’s most complex conglomerates know as Virgin Group. Branson’s life motto is to ‘have fun’ this is reason to his positive eccentric personality that reflects to inspire others around him. Lead by example† this phrase is used throughout human life to portray inspiration on others, through creating an inspiration on others leaders are assisting to motivate. Motivation, Motivation is a key part of a great leader’s success in achieving organisational performance. Motivation is referred to as â€Å"the forces within an individual that account for the level, direction and persistence of effort expended at work† (Wood, J. et al, 2010). Motivation on individuals is reflected by successful leaders, through multiple different theories. Abraham Maslow’s hierarchy of needs theory identifies high order needs and low order needs† (Wood, J. et al, 2010) this details a pyramid that highlights the work motivational needs of individuals, including psychological, safety, social, esteem and self-actualisation. This research has contributed to the success of leaders in motivating and achieving ultimate organisational performance across large contemporary organisations. In many of today’s organisations leaders commonly motivate employees through the use of offering extrinsic rewards, â€Å"positively valued work outcomes† (Wood, J. t al, 2010), this may range from Christmas bonuses to simply allowing the use of a company car. Through the use of extrinsic rewards individuals are motivated to produc e their maximum performance. It is evident in KPMG, one of the world’s largest consulting firms; the use of leaders providing employees with extrinsic rewards motivates employees to achieve their full potential. KPMG provides employees with an annual bonus fluctuating on the employees yearly work effort. In doing so employees are determined to work to achieve a high constant overall organisational performance. Individuals that utilize the use of their leadership talents; creating opportunity, inspiring and motivating individuals will evidently result in reaching an optimum level of organisational performance productivity. Throughout history within these abilities leaders have developed several theories to manage the way it is put into practice. Through the past centuries leaders have always played a pivotal role in the triumph of groups, from the times of Genghis Khan, Napoleon and even Hitler, their efforts have exemplified how great leaders can make a major difference to organisations. All leaders tend to have different styles when it comes to commanding their subordinates and as time has progressed they have been categorized into different approaches and theories. The first theory to be thought up was known as the trait theory, and as the years moved on different studies and research was conducted to the point where different types of leadership are studied. Trait Theory, The trait theory which identifies different traits between leaders and followers, and assumes that leaders are born not developed. The trait theory takes into account physical and mental attributes of people that appeared to be more successful leaders. This theory took into account things such as height, weight and personality, and rather than study each of those in detail, these characteristics were recognised in effective and ineffective leaders. Therefore people could be able to predict if a person was a worthy or unworthy leader, although due to the studies being conducted as early as 1900 there was never any real recording s of evidence. Also there were never any real set of traits that defined a good leader, in other words there was no benchmark, which made it difficult for people to understand the theory as there were great leaders that had different characteristics. For example Hitler had different traits and characteristics to Nelson Mandela, Hitler was considered hard and persistent whereas Mandela was a visionary. Although it is certain that the trait theory set the trend for years to come. Behavioural Theories, The trait theory laid the foundations for what was later known as the behavioural theories; this included the Michigan and Ohio State studies. The behavioural theories compliments the flaws of the trait theory as it is more action based rather than only taking natural aspects into consideration. The Michigan studies showed that there are two types of leaders, employee-centred supervisors and production-centred supervisors. Employee-centred supervisors are leaders who look out for their workers and try to keep them emotionally happy by showing genuine interest in the wellbeing. Whereas production-centred employees are mostly concerned about getting the work done and meeting figures, rather than looking out for the welfare of their workers. Research has shown that employee-centred managers were found to have more efficient and effective groups than production-centred supervisors. The Ohio State studies which are very similar to the Michigan studies showed that leaders had two main dimensions, consideration and initiating structure, which can be related to employee-centres supervisors and production-centred supervisors respectively. Although the results from this study showed different results as the supervisors who received the best output from their employees showed a high amount of consideration and initiating structure. Situational contingency theories, The next sets of theories to be developed were the situational contingency theories, which came about in the 1960’s. These theories involve leaders that can adapt to the situation they are place in, for example Fiedler’s theory predicts work group effectiveness and how it depends on a match between the leader’s technique and the difficulties of the situation. Fiedler also considered the amount of situational control a leader has, which is how well a leader can determine the result of a groups actions and the course the will take on the way. Of course Fiedler was not the only person to come up with situational theories, there was also; Robert House, Paul Hersey, Kenneth Blanchard, Steve Kerr and Jonathon Jermier, but for the purpose of not repeating similar information they will not be discussed. It is fair to say that over the years leadership theories have changed with the times. The trait theory was effective for organisational performance as it helped identify leaders before they even took on a leading role, and although today that might seem politically incorrect, it’s what was suitable for the times. The behavioural theories in the late 1940’s had a great effect on organisational performance because people started to take into account the actions of their leaders and the different effect that certain actions would obtain. The Situational theories took another step into understanding the effect that good leaders can have on organisational behaviour by interpreting the how leaders manage the situation and whether or not they can mould to new and different challenges. As leadership theories have evolved, only the strong have survived, and the recent global financial crisis has provided great challenges for leaders to portray their successful qualities. Leadership is a quality that has grown in human culture over thousands of years and within the past century economies have taken significant falls highlighting the choices great leaders have made to sustain organisational performance through this time. Two significant downturns in history shook the world economy, the great depression of the 1930’s, Franklin D Roosevelt’s leadership qualities particularly exceled through this period and the global financial crisis saw absurd leadership talents ChemChina. These flairs in leadership talent depicted the difference it can asset on organisational performance. Global Financial Crisis – ChemChina In 2007 the world economy fell into the deepest trough in decades, this is known as the global financial crisis, it was considered the worst financial crisis since the great depression in the 1930’s. The global financial crisis saw the collapse of multiple investment banks across the United States of America and developed a ripple effect that was felt by economies across the globe. Great leaders stood out through this period powering their companies without feeling the effect of the economic down turn. One company in particular that continued a sustainable growth in organisational performance is ChemChina. While millions of companies were collapsing and on the verge of insolvency ChemChina’s prime operating income multiplied seven times, total assets increased by 133. 4 billion Yuan and total profits escalated an increased 12 times over, Ren Jianxin the president of ChemChina’s outstanding leadership qualities were the main motive behind the relentless accomplishment. The massive operational increases in production were due to major â€Å"innovations in organisation, institutions and technologies involving changes in their way of thinking, philosophies and producti on technologies and processes†. (Ren Jianxin, 2009) All this required an overall development in their way of leadership, in turn a successful corporate transformation thus organisational performance. 930’s Great Depression – Franklin D Roosevelt The great depression which hit the world through the 1930’s affected the world on a scale that had never been seen before. The depression started in America when stock prices started to fall, and on October 29, 1929 the stock market crashed and the effect spread globally. The effect this had on the world was far worse than anyone could have ever imagined causing people to commit suicide, die of starvation and start their lives over in a new world. Out of this came one of the world’s greatest ever leaders, Franklin D. Roosevelt, who dragged America and the rest of the world out of the depression. Roosevelt took over as president in March of 1933 and re instilled hope back into the American people by promising action and in his first address to the people he said one of today most famous quotes, â€Å"The only thing we have to fear is fear itself†. Roosevelt decided that to get the country out of the position they were in he had to adopt policies that were frowned upon, such as creating deficit budgets, which for the times were unheard of. When Roosevelt pulled the American economy back to its feet he was rewarded by being elected for four successive terms. Roosevelt proved how one great leader can have a major effect on a group of people and that it is not impossible to come back from the dead. Financial crisis’s at any time cause a great amount of angst in the around the world, and it takes very special people to lead corporations, governments or even countries out of these fatal situations. ChemChina and Roosevelt were both innovative in their styles and led their respective organisations either to new great heights or just simply out of a great depression. Throughout the times Leaders have always come under scrutiny from their critics, although one does not attain criticism without achieving. Without Leaders providing their qualities to inspire, create opportunity and motivate, organisations would have a lack of soul and would be forever falling in a negative style.