tragoed Metamorphosis of the Tragedy in Oedipus Rex, Hamlet, and Desir

Metamorphosis of the Tragedy in Oedipus Rex, Hamlet, and Desire Under the Elms Tragedy is considered by many to be the greatest of the genres. Often something goes wrong and exposes something great. Characters generally have more depth as evidenced by Hamlet. Tragedy shows up in the great periods of history: Classical Greece, Renaissance, and the early 20th century. It is a far more complex genre than comedy or romance. It teaches people to think since the storylines never have a simple answer or resolution. We see this in Desire Under the Elms. Family relationships and inheritances are complicated and even when Abbie kills the baby, Eben decides to join her in her guilty plea when he is clearly not a participant in the murder. Unlike comedy, there is less spectacle onstage. Iokaste hangs herself offstage, King Hamlet's murder is only reenacted but not seen directly, and the audience doesn't see Abbie murder her baby. This forces or allows the audience members to use their imaginations to envision these crucial scenes, adding a layer of complexity t o the play. Hamlet we are reminded of fate by the line, "There's a divinity that shapes our ends." Then in Desire, Cabot consistently looked to God for direction. These situations don't allow us to remain passive and simply be entertained when we view tragedy. We must grapple with the tough issues of life. Â   Plot is considered significant in tragedy for many reasons. . Plot examines the limits of human greatness. It is the most examined area in the study of literature probably because it is unique to humans. It can be both edifying for an audience and, at the same time, allow for a catharsis. Plot allows characters to play out their fate. Freud believe... ...e less class conscious, the need for high status of one man disappears. In Desire the hero(es) were farmers. Â   Another way that tragedy has evolved is through more comedy being added to the tragedy. Oedipus has no real comic scenes. Hamlet had a few, but Desire had evidence of comedy sprinkled throughout by way of the brothers, the dance, food and drink, and animal references. Tragedy also had evolved to the point of having more romance. Again romance was missing from Oedipus, we saw a bit more in Hamlet between Claudius and Gertrude and Hamlet and Ophelia. But then in the modern tragedy romance is at the center of the play, albeit an uncomfortable, complicated romance. Some example in the play Desire include: the sexual advances, the kiss and walk away together, the reuniting at the end, stage directions that describe the physical appearance. Â  

Emission Control

Emission Control Techniques 1. INTRODUCTION The need to control the emissions from automobiles gave rise to the computerization of the automobile. Hydrocarbons, carbon monoxide and oxides of nitrogen are created during the combustion process and are emitted into the atmosphere from the tail pipe. There are also hydrocarbons emitted as a result of vaporization of gasoline and from the crankcase of the automobile. The clean air act of 1977 set limits as to the amount of each of these pollutants that could be emitted from an automobile. The manufacturers answer was the addition of certain pollution control devices and the creation of a self-adjusting engine. 1981 saw the first of these self-adjusting engines. They were called feedback fuel control systems. An oxygen sensor was installed in the exhaust system and would measure the fuel content of the exhaust stream. It then would send a signal to a microprocessor, which would analyze the reading and operate a fuel mixture or air mixture device to create the proper air/fuel ratio. As computer systems progressed, they were able to adjust ignition spark timing as well as operate the other emission controls that were installed on the vehicle. The computer is also capable of monitoring and diagnosing itself. If a fault is seen, the computer will alert the vehicle operator by illuminating a malfunction indicator lamp. The computer will at the same time record the fault in it's memory, so that a technician can at a later date retrieve that fault in the form of a code which will help them determine the proper repair. Some of the more popular emission control devices installed on the automobile are: EGR valve, Catalytic Converter, Air Pump, PCV Valve, Charcol Canitiser etc. Like SI engine CI engines are also major source of emission. Several experiments and technologies are developed and a lot of experiments are going on to reduce emission from CI engine. The main constituents causing diesel emission are smoke, soot, oxides of nitrogen, hydrocarbons, carbon monoxides etc. Unlike SI engine, emission produced by carbon monoxide and hydrocarbon in CI engine is small. Inorder to give better engine performance the emission must be reduce to a great extend. The emission can be reduced by using smoke suppressant additives, using particulate traps, SCR (Selective Catalytic Reduction) etc. 2. EMISSION CONTROL IN SI ENGINE 2. 1. Methods to reduce emission in SI engine. 2. 1. 1. Catalytic Converter Automotive emissions are controlled in three ways, one is to promote more complete combustion so that there are less by products. The second is to reintroduce excessive hydrocarbons back into the engine for combustion and the third is to provide an additional area for oxidation or combustion to occur. This additional area is called a catalytic converter. The catalytic converter looks like a muffler. It is located in the exhaust system ahead of the muffler. Inside the converter are pellets or a honeycomb made of platinum or palladium. The platinum or palladiums are used as a catalyst (a catalyst is a substance used to speed up a chemical process). As hydrocarbons or carbon monoxide in the exhaust are passed over the catalyst, it is chemically oxidized or converted to carbon dioxide and water. As the converter works to clean the exhaust, it develops heat. The dirtier the exhaust, the harder the converter works and the more heat that is developed. In some cases the converter can be seen to glow from excessive heat. If the converter works this hard to clean a dirty exhaust it will destroy itself. Also leaded fuel will put a coating on the platinum or palladium and render the converter ineffective. 2. 1. 2. PCV Valve The purpose of the positive crankcase ventilation (PCV) system, is to take the vapors produced in the crankcase during the normal combustion process, and redirecting them into the air/fuel intake system to be burned during combustion. These vapors dilute the air/fuel mixture, they have to be carefully controlled and metered so as not to affect the performance of the engine. This is the job of the positive crankcase ventilation (PCV) valve. At idle, when the air/fuel mixture is very critical, just a little of the vapors are allowed in to the intake system. At high speed when the mixture is less critical and the pressures in the engine are greater, more of the vapors are allowed in to the intake system. When the valve or the system is clogged, vapors will back up into the air filter housing or at worst, the excess pressure will push past seals and create engine oil leaks. If the wrong valve is used or the system has air leaks, the engine will idle rough, or at worst engine oil will be sucked out of the engine. 2. 1. 3. EGR Valve The purpose of the exhaust gas recirculation valve (EGR) valve is to meter a small amount of exhaust gas into the intake system; this dilutes the air/fuel mixture so as to lower the combustion chamber temperature. Excessive combustion chamber temperature creates oxides of nitrogen, which is a major pollutant. While the EGR valve is the most effective method of controlling oxides of nitrogen, in it's very design it adversely affects engine performance. The engine was not designed to run on exhaust gas. For this reason the amount of exhaust entering the intake system has to be carefully monitored and controlled. This is accomplished through a series of electrical and vacuum switches and the vehicle computer. Since EGR action reduces performance by diluting the air /fuel mixture, the system does not allow EGR action when the engine is cold or when the engine needs full power. [pic] Fig. 2. 4. EGR Valve 2. 1. 4. Evaporative Controls Gasoline evaporates quite easily. In the past these evaporative emissions were vented into the atmosphere. 0% of all HC emissions from the automobile are from the gas tank. In 1970 legislation was passed, prohibiting venting of gas tank fumes into the atmosphere. An evaporative control system was developed to eliminate this source of pollution. The function of the fuel evaporative control system is to trap and store evaporative emissions from the gas tank and carburetor. A charcoal canister is used to trap the fuel vapors. The fuel vapors adhere to the charcoal, until the engine is started, and engine vacuum can be used to draw the vapors into the engine, so that they can be burned along with the fuel/air mixture. This system requires the use of a sealed gas tank filler cap. This cap is so important to the operation of the system, that a test of the cap is now being integrated into many state emission inspection programs. Pre-1970 cars released fuel vapors into the atmosphere through the use of a vented gas cap. Today with the use of sealed caps, redesigned gas tanks are used. The tank has to have the space for the vapors to collect so that they can then be vented to the charcoal canister. A purge valve is used to control the vapor flow into the engine. The purge valve is operated by engine vacuum. One common problem with this system is that the purge valve goes bad and engine vacuum draws fuel directly into the intake system. This enriches the fuel mixture and will foul the spark plugs. Most charcoal canisters have a filter that should be replaced periodically. This system should be checked when fuel mileage drops. 2. 1. 5. Air Injection Since no internal combustion engine is 100% efficient, there will always be some unburned fuel in the exhaust. This increases hydrocarbon emissions. To eliminate this source of emissions an air injection system was created. Combustion requires fuel, oxygen and heat. Without any one of the three combustion cannot occur. Inside the exhaust manifold there is sufficient heat to support combustion, if we introduce some oxygen than any unburned fuel will ignite. This combustion will not produce any power, but it will reduce excessive hydrocarbon emissions. Unlike in the combustion chamber, this combustion is uncontrolled, so if the fuel content of the exhaust is excessive, explosions that sound like popping will occur. There are times when under normal conditions, such as deceleration, when the fuel content is excessive. Under these conditions we would want to shut off the air injection system. This is accomplished through the use of a diverter valve, which instead of shutting the air pump off diverts the air away from the exhaust manifold. Since all of this is done after the combustion process is complete, this is one emission control that has no effect on engine performance. The only maintenance that is required is a careful inspection of the air pump drive belt. 2. 2. Modification in SI engine to reduce emission. †¢ Multi-port fuel injection system to completely replace carburetors. †¢ Electronic engine management to accurately regulate fuel supply to cylinders by sensing various engine parameters. 4-valve system to replace 2-valve system, improved combustion chamber design and improved inlet manifold design for axial stratification of charge. †¢ Turbo-charged (TC) and Turbo-charged After Cooled (TCAC) engines. †¢ Turbo-compounded engines; they are found to be upto 18 per cent better than the conventional engines. †¢ After treatment, catalytic co nverter and exhaust gas recycling. Some future directions for engines are: †¢ Lean burn technology, air-fuel ratio as lean as 22:1 is possible with 4-valves, high swirl and squish generated turbulence. †¢ Use of ceramic components (e. g. low density Silicon Nitride, Si3N4) such as piston pins, valves, blades in turbochargers. †¢ Variable Valve Activation (VVA) providing improved charge control of SI engines, reducing fuel consumption by 5 per cent at low/medium speed and  13  Ã‚   per cent at full engine speed. †¢ 3. EMISSION CONTROL IN CI ENGINE 3. 1. Methods to reduce emission in CI engine 3. 1. 1 Particulate filter. Particulate filters are highly effective in the elimination of particulate matter (PM10) or soot from diesel exhaust. It has a variety of filter coatings and designs, depending of the engine application and duty cycle. . 1. 2. Selective catalytic reduction Selective Catalytic Reduction of NOx (generally abbreviated with SCR deNOx) is a very pow erful technology to reduce the NOx emission and fuel consumption of truck and passenger car diesel engines. The European truck manufacturers starting in October 2005, when EURO-4 emissions legislation enters into force, will introduce SCR deNOx on a large scale. With SCR deNOx a 32. 5% aqueous urea solution is injected upstream of the catalyst. Urea which converts to NH3 (ammonia) in the hot exhaust gases reacts with NOx to form harmless N2 and H2O. The urea quantity needs to be precisely dosed as a function of the engine NOx output and the catalyst operating conditions. 3. 1. 3. Smoke Suppressant additives There are a number of additives, which are added in order to reduce the smoke from CI engine. HYDRAX ATH (hydrated alumina), HYDRAMAX (magnesium hydroxides and hydroxy-carbonates), CHARMAX LS (low smoke), CHARMAX LS ZST & LS ZHS (zinc stannates & zinc hydroxystannates), CHARMAX AOM & MO (ammonium octamolybdate & molybdic oxide), CHARMAX ZB200 & ZB400 (zinc, magnesium, and calcium borates) etc. This reduces the amount of smoke produced by various chemical reactions. The smoke produced can also be controlled by deairating, maintenance, catalytic mufflers, fumigation etc. 3. 1. 4. Control of odour It is very difficult to estimate the odour produced by the diesel engine because the lack of standard tests has not allowed much work to be done in this direction. Catalytic odour control system muffler and or catalyst container are under development and it has been found that certain oxidation catalysts if used under favorable conditions reduce odour intensity. But the tests are still going on. 3. 1. 5. Exhaust Gas and After treatment Modeling While the diesel (compression ignition) engine is more efficient than the conventional spark ignition engine from a thermodynamics standpoint, it has the potential for a large negative environmental impact. The lean combustion of these devices provides the perfect environment for the production of NOx; relatively high temperatures and abundant oxygen. In addition, direct injection of fuel into the combustion chamber creates rich fuel pockets that can cause the formation of particulate matter (soot). Recently these emissions have come under increased scrutiny from the Environmental Protection Agency (EPA). Their radical nature (smog) in the atmosphere and subsequent health hazards has caused the EPA to act to increase the regulation standards for both 2007 and 2010. Unlike the three-way catalysts currently used on spark-ignition based platforms, diesel after treatment systems will not utilize one device for all problematic emissions. Instead, devices are targeted to take care of only one or a few issues at a time. For instance, Diesel Particulate Filters (DPF) might take care of the particulate matter while a Diesel Oxidation Catalyst (DOC) will eliminate the CO and HC and a Lean NOx Trap is used for the NOx emissions. Until now, diesel engine manufacturers have been able to meet the legislation though in-cylinder technology. The proposed EPA legislation has caused the diesel industry to work on finding cost-efficient after treatment technology while still looking in-cylinder for improvements. 3. 2. Modification in CI engine to reduce emission 3. 2. 1. Commercial vehicle emission control Several improvements are needed. These could be achieved through redesigning of engines and application of new technologies:  · Improvement in fuel injection system and use of higher injection pressure. . . Common rail system unit injections instead of multi-cylinder fuel injection pumps.  · Electronically controlled injection system to provide variable injection timing with good dynamic response to engine load, speed, and temperature.  · Improved cylinder head design, inlet port, re-entrant combustion chambers.  · 4-Valve system to improve volumetric efficiency and provide better mixing of fuel and air. Turbo-charged and Turbo-charged aftercooled engines to provide higher specific power, better fuel economy, and less emission pollution.  · After-treatment, particulate traps, and catalytic converters. 3. 2. 2. Passenger Car Diesel Engine In India, Indirect Injection (IDI) diesel engines are commonly used in passenger cars. Due to the pricing policies of fuels, the running c ost of diesel cars is lower than those of petrol cars. Diesel engines are popular for taxis, most of which are retrofitted by diesel engines. Private cars with OE diesel engines are also in demand. Major directions for engine development to control different pollutants are as follows:  · HC emission control requires, – low sac volume nozzles; – Complete combustion of injected fuel; – minimum lube consumption.  · NOx emission control is helped by, – cooling of intake air before entering the engine; – Retarded combustion; and – Moderate air motion.  · Particulate emission control is helped by, – high injection pressure; – fine fuel atomization; – intensive air motion; – high excess air; and – minimum lube consumption. 4. EMISSION CONTROL NORMS IN SI AND CI ENGINE The first Indian emission regulations were idle emission limits which became effective in 1989. These idle emission regulations were soon replaced by mass emission limits for both gasoline (1991) and diesel (1992) vehicles, which were gradually tightened during the 1990’s. Since the year 2000, India started adopting European emission and fuel regulations for four-wheeled light-duty and for heavy-duty vehicles. Indian own emission regulations still apply to two- and three-wheeled vehicles. 4. 1. Emission control norms in SI engine. Table. 4. 1: EMISSION CONTROL NORMS IN SI ENGINE Level of Emission | 2/3 Wheelers ## | 4 Wheelers | |Norms | | | | | 2-Stroke | 4-Stroke | 4-Stroke | | |* Intake, exhaust, | |* Intake, exhaust, | | |combustion optimization |* 4-Stroke engine |combustion optimization | |Euro I /India 2000 |* Catalytic converter |technology |*Carburetor optimization | | |* Secondary air injection |* Hot tube |* Fuel njection | |Euro II / |* Catalytic converter |* Seco ndary air |* Catalytic converter | |Bharat Stage II |* CNG / LPG |injection |* Fixed EGR | | |(3 wheelers only) |* CNG / LPG |* Multi-valve | | | |(3 wheelers only) |* CNG/LPG | | | | |* Fuel injection +catalytic | | |* Fuel injection |* Fuel injection |converter | | |* Catalytic converter |* Carburetor+ |* Variable EGR | |EuroIII/ Bharat Stage | |catalytic converter |* Variable valve timing | |III | | |* Multi-valve | | | | |* On-board diagnostics system | | | | |* CNG/LPG | | | | |* Direct cylinder | |Euro IV / |* To be developed |* Lean burn |injection | |Bharat Stage IV | |* Fuel injection+ |* Multi-brick | | | |catalytic converter |catalytic converter | | | | |* On-board diagnostics system | ## Euro norms are not applicable for 2 / 3 wheelers in India 4. 2. Emission control norms in CI engine | | | |Level Of Emission Norms Technology Options | | | · Retarded injection timing | | | · Open/re-entrant bowl, | |Euro I / India 2000 | · Intake, exhaust and combustion optim isation | | | · FIP~700-800 bar, low sac injectors | | | · High swirl | | | · Naturally aspirated | | | · Turbocharging | | | · Injection pressure > 800 bar, moderate swirl | | | · High pressure inline / rotary pumps, injection rate control | |Euro II / | · VO nozzles | |Bharat Stage II | · Re-entrant combustion chamber | | | · Lube oil consumption control | | | · Inter-cooling (optional, depends on specific power), | | | · EGR (may be required for high speed car engines) | | | · Conversion to CNG with catalytic converter | | | · Multi valve, | | | · Low swirl – high injection pressure > 120 bar | | | · Rotary pumps, pilot injection rate shaping | | | · Electronic fuel injection | |Euro III / | · Critical lube oil consumption control |Bharat Stage III | · Variable geometry turbocharger (VGT) | | | · Inter-cooling | | | · Oxycat & EGR | | | · CNG/LPG | | | · High specific power output | | | · Particulate t rap | | | · NOx trap | | | · On board Diagnostics system | |Euro IV / | · Common rail injection-injection pressure>1600 bar | |Bharat Stage IV | · Fuel Cell | | | · CNG/LPG | On October 6, 2003, the National Auto Fuel Policy has been announced, which envisages a phased program for introducing Euro 2 – 4 emission and fuel regulations by 2010. The implementation schedule of EU emission standards in India is summarized in Table 4. 3 The above standards apply to all new 4-wheel vehicles sold and registered in the respective regions. In addition, the National Auto Fuel Policy introduces certain emission requirements for interstate buses with routes originating or terminating in Delhi or the other 10 cities. For 2-and 3-wheelers, Bharat Stage II (Euro 2) is be applicable from April 1, 2005 and Stage III (Euro 3) standards would come in force preferably from April 1, 2008, but not later than April 1, 2010. Table. 4. 3. INDIAN EMISSION STANDARDS | Indian Emission Standards (4-Wheel Vehicles) | | Standard | Reference | Date | Region | India 2000 |Euro 1 |2000 |Nationwide | |Bharat Stage II |Euro 2 |2001 |NCR*, Mumbai, Kolkata, Chennai | | | |2003-04 |NCR*, 10 Cities†  | | | |2004-05 |Nationwide | |Bharat Stage III |Euro 3 |2005-04 |NCR*, 10 Cities†  | | | |2004-10 |Nationwide | |Bharat Stage  IV |Euro 4 |2010-04 |NCR*, 10 Cities†  | * National Capital Region (Delhi) Mumbai, Kolkata, Chennai, Bangalore, Hyderabad, Ahmedabad, Pune, Surat, Kanpur and Agra The above standards apply to all new 4-wheel veh icles sold and registered in the respective regions. In addition, the National Auto Fuel Policy introduces certain emission requirements for interstate buses with routes originating or terminating in Delhi or the other 10 cities. For 2-and 3-wheelers, Bharat Stage II (Euro 2) will be applicable from April 1, 2005 and Stage III (Euro 3) standards would come in force preferably from April 1, 2008, but not later than April 1, 2010. Emission standards for new heavy-duty diesel engines—applicable to vehicles of GVW > 3,500 kg—are listed in Table 4. 4. Emissions are tested over the ECE R49 13-mode test (through the Euro II stage). Table 4. 4 | |EMISSION STANDARDS FOR DIESEL TRUCK AND BUS ENGINES, G/KWH | |Year | Emission standards for light-duty diesel vehicles (GVW ? 3,500 kg) are summarized in Table 3. Ranges of emission limits refer to different classes (by reference mass) of light commercial vehicles; compare the EU light-duty vehicle emission standards page for details on the Euro 1 and later standards. The lowest limit in each range applies to passenger cars (GVW ? 2,500 kg; up to 6 seats). |Table 4. | |EMISSION STANDARDS FOR LIGHT-DUTY DIESEL VEHICLES, G/KM | |Year | The test cycle has been the ECE + EUDC for low power vehicles (with maximum speed limited to 90 km/h). Before 2000, emissions were measured over an Indian test cycle. Engines for use in light-duty vehicles can be also emission tested using an engine dynamometer. The respective emission standards are listed in Table 4. 3 |Table 4. 6 | |EMISSION STANDARDS FOR LIGHT-DUTY DIESEL ENGINES, G/KWH | |Year | Emission standards for gasoline vehicles (GVW ? ,500 kg) are summarized in Table 5. Ranges of emission limits refer to different classes of light commercial vehicles (compare the EU light-duty vehicle emission standards page). The lowest limit in each range applies to passenger cars (GVW ? 2,500 kg; up to 6 seats). |Table 4. 7 | |EMISSION STANDARDS FOR GASOLINE VEHICLES (GVW ? 3,500 KG), G/KM | |Year |Reference |CO |HC |HC+NOx | |1991 |- |14. 3-27. |2. 0-2. 9 |- | |1996 |- |8. 68-12. 4 |- |3. 00-4. 36 | |1998* |- |4. 34-6. 20 |- |1. 50-2. 18 | |2000 |Euro 1 |2. 72-6. 90 |- |0. 97-1. 70 | |2005†  |Euro 2 |2. 2-5. 0 |- |0. 5-0. 7 | |* for catalytic converter fitted vehicles | |†  earlier introduction in selected regions, see Table 4. | Gasoline vehicles must also meet an evaporative (SHED) limit of 2 g/test (effective 2000). Emission standards for 3- and 2-wheel gasoline vehicles are listed in the following tables. |Table 4. 8 | |EMISSION STANDARDS FOR 3-WHEEL GASOLINE VEHICLES, G/KM | |Year |CO |HC |HC+NOx | |1991 |12-30 |8-12 |- | |1996 |6. 5 |- |5. 40 | |2000 |4. 00 |- |2. 00 | |Table 4. 9 | |EMISSION STANDARDS FOR 2-WHEEL GASOLINE VEHICLES, G/KM | |Year |CO |HC |HC+NOx | |1991 |12-30 |8-12 |- | |1996 |4. 0 |- |3. 60 | |2000 |2. 00 |- |2. 00 | CONCLUSION Efforts are being made to reduce the consumption of fossil fuels and maximize the utilization of environment-friendly energy sources and fuels for meeting energy needs. In India, the demand for oil for the transport sector is estimated to increase over the next decade. This sector is the largest consumer of petroleum products . Government is providing policy support, fiscal incentives and regulatory measures for development of alternative energy vehicles and fuels. Battery operated vehicles, fuel cell vehicles, hydrogen powered vehicles and bio-fuel powered vehicles have been identified in this context. The development activities of such fuels and vehicles need to be further encouraged particularly in view of their potential to protect the environment. Hybrid Electric Vehicles (HEVs) use the combination of engine of a conventional vehicle with electric motor powered by traction batteries and/or fuel cell. This combination helps in achieving both the energy and environmental goals. The deployment of a large number of this type of vehicles would help us in terms of environmental benefits, reduction of oil consumption and reduction in emissions. In hybrid electric vehicles propulsion, energy is available from more than one source of energy. The three configurations of HEV are series hybrid system, parallel hybrid system and split hybrid system. Fuel cells produce electricity, employing reaction between hydrogen and oxygen gases, electrochemically. Fuel cells are efficient, environmentally benign, compact, modular and reliable for power generation. Different type of Fuel cells currently under development are the Protons Exchange Membrane Fuel Cells (PEMFCs), Phosphoric Acid Fuel Cells (PAFCs), Molten Carbonate Fuel Cells (MCFCs),Solid Oxide Fuel Cells (SOFCs) etc. Hydrogen is receiving worldwide attention as a clean fuel and efficient energy storage medium for automobiles. Hydrogen can replace or supplement oil used in road transportation. Bio-fuel is an efficient, environment friendly, 100 per cent natural energy alternative to petroleum fuels9-10. In view of the potential of being produced from several agricultural sources and because of its low emission characteristics, bio-fuels in recent years are receiving a great deal of attention as a substitute to petroleum fuels. Ethanol and bio-diesel are the two bio-fuels which are being looked upon as the potential fuels for surface transportation. REFERENCES 1. www. howstuffworks. com 2. www. dieselnet. in 3. www. auto101. com 4. www. wikipedia. com 5. Mathur & Sharma. ; Internal Combustion Engine, Dhanpat rai publications. pp 774- 778 1. SEMINAR TOPIC FROM :: www. edufive. com/seminartopics. html

Multicultural Curriculum For A Multicultural Classroom

When I first started this class I was aware of multicultural curriculum but I was not aware of how important it was in a classroom setting. As the weeks have gone by in this class, I have learned that multicultural curriculum is important because it s a way for teachers to include all children from diverse backgrounds. As we ve have progressed in the study of multicultural curriculum we have learned to address important topics such as biases, social justice, stereotypes, the development of identity and how to communicate with parents. The purpose of this paper is to inform our readers of how a multicultural education benefits children. How can teachers create a multicultural learning community, and how can teachers help guide children†¦show more content†¦(Igoa p. 44). (Robert Cole p. 3). 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Kim relays the four phases of multicultural education: incorporating ethnic studies into school curricula, total school reform for educational equality, inclusion of other minority groups by incorporating their history and culture into the curriculum, and analyzing the differences

Learn How to Conjugate Réduire (to Reduce) in French

Rà ©diure  is the French verb that means to reduce. This should be pretty easy to remember because the English and French words are so similar. What happens when you want to say reduced or reducing? Thats when youll need to know  rà ©duires conjugations and this lesson will show you the basics. The Basic Conjugations of  Rà ©duire The French language gives us more forms of verbs to learn then we have in English. Thats because the verb changes with every subject pronoun within each tense. This means you more words to memorize. That is only one challenge in French verb conjugations, though. Words like  rà ©duire  pose another because they dont follow any of the normal rules.  Rà ©duire  is an  irregular verb, though all  French verbs ending in  -uire  are conjugated this way. To make this easier, consider studying a few at the same time. As with any conjugation, we begin with the verb stem. In this case, that is  rà ©dui-. From there, we add a variety of endings to match the tense with the subject pronoun. As an example,  je rà ©duis  means I am reducing while  nous rà ©duisions  means we reduced. Present Future Imperfect je rduis rduirai rduisais tu rduis rduiras rduisais il rduit rduira rduisait nous rduisons rduirons rduisions vous rduisez rduirez rduisiez ils rduisent rduiront rduisaient The Present Participle of  Rà ©duire The present participle of rà ©duire is also irregular in that it adds an - sant ending to the radical. This produces the word rà ©duisant. Rà ©duire  in the Compound Past Tense The  passà © composà ©Ã‚  is a compound past tense and its used often in French. It requires the  past participle  rà ©duit  along with the present tense conjugate of the auxiliary verb  avoir. This forms phrases such as  jai rà ©duit  for I reduced and  nous avons rà ©duit  for we reduced. More Simple Conjugations of  Rà ©duire There are a few more basic conjugations you may need of  rà ©duire  at times and each has its own usage. For example,  the subjunctive  questions whether the act of reducing took place. Similarly,  the conditional  says the reduction will only happen under certain conditions. The passà © simple  and  the imperfect subjunctive  are literary tenses and found most often in formal writing. Subjunctive Conditional Pass Simple Imperfect Subjunctive je rduise rduirais rduisis rduisisse tu rduises rduirais rduisis rduisisses il rduise rduirait rduisit rduist nous rduisions rduirions rduismes rduisissions vous rduisiez rduiriez rduistes rduisissiez ils rduisent rduiraient rduisirent rduisissent For direct statements, commands, and requests when you dont want to mince words, you can use  the French imperative. When doing so, skip the subject pronoun, simplifying  tu rà ©duis  to  rà ©duis. Imperative (tu) rduis (nous) rduisons (vous) rduisez

Impact Of Greater Trade Liberalisation On Influencing A...

Introduction This research proposal is going to assess the impact of greater trade liberalisation on influencing a pollution heaven effect. By using the implementation of the North American Free Trade Agreement (NAFTA) as an indicator for reducing the costs of moving production, we can determine whether the given the opportunity of greater trade liberalisation, Canada would move pollution intensive production to the less environmentally regulated country of Mexico. A difference-in-differences approach is suggested in order to compare the pollution haven effect on Canada, the US and Mexico in comparison with non-NAFTA countries. 1. Aim The relationship between trade liberalisation and the existence of pollution havens have brought about†¦show more content†¦This can be seen through trade liberalisation that occurs when countries open up to greater free trade and remove trade barriers or tariffs. This occurred in 1994 with the North American Free Trade Agreement (NAFTA). This agreement broke down trade barriers between the US, Mexico and Canada in order to create one of the world’s largest free trade areas. Canada and the United States are both highly developed industrial nations that have high levels of environmental regulation and enforcement of such. Whereas Mexico, as a developing nation, stands in contrast to them. Although some point out that Mexico has comprehensive law providing strict environmental protection which can be considered just as stringent as Canadian or American legislation. Due to the fact that Mexico lacks the financial resources to fully enforce these regulations it therefore is considered to be more lax in regards to environmental regulations. In this sense Mexico will act as the Pollution Haven due to weaker environmental policy enforcement compared to the US and Canada, which are similar in terms of environmental policy implementation and enforcement. Stern (2002) has found that Mexico had approximately twice the level of sulpur emissions compared to the US, when taking account of the level of income and the input–output structure of the economy. The

Advantages of mother tongue free essay sample

However, it is just this kind of tendency that could lead to the development of an excessive dependency on the students’ mother tongue (Harbord, 1992) by both teachers and students. Consequently, students lose confidence in their ability to communicate in English: They may feel that the only way they would understand anything the teacher says is when it has been translated, or they use their mother tongue even when they are perfectly capable of expressing the same idea in English. This can significantly reduce students’ opportunities to practice English, and students fail to realise that using English in classroom activities is essential to improve their language skills. Translation also regularly creates the problem of oversimplification because many cultural and linguistic nuances cannot be directly translated (Harbord, 1992). For example, the sentence, â€Å"That’s so cool! † in English means that something is amazing or incredible. This phrase is the product of the continual evolution of the English language that was affected by the specific culture at a certain time. We will write a custom essay sample on Advantages of mother tongue or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page A direct translation of this sentence into Chinese, for example, would not have the same meaning; in fact, it would not make sense at all. While the argument from both sides are equally compelling, it is clear, that despite the numerous advantages of students using their L1 in English-language learning, they do not outweigh the disadvantages. Is it possible to maximize the benefits and minimize the repercussions? Part II will provide suggestions for using the mother tongue judiciously in the English-language classroom. Disadvantages of using the mother tongue However, it is just this kind of tendency that could lead to the development of an excessive dependency on the students’ mother tongue (Harbord, 1992) by both teachers and students. Consequently, students lose confidence in their ability to communicate in English: They may feel that the only way they would understand anything the teacher says is when it has been translated, or they use their mother tongue even when they are perfectly capable of expressing the same idea in English. This can significantly reduce students’ opportunities to practice English, and students fail to realise that using English in classroom activities is essential to improve their language skills. Translation also regularly creates the problem of oversimplification because many cultural and linguistic nuances cannot be directly translated (Harbord, 1992). For example, the sentence, â€Å"That’s so cool! † in English means that something is amazing or incredible. This phrase is the product of the continual evolution of the English language that was affected by the specific culture at a certain time. A direct translation of this sentence into Chinese, for example, would not have the same meaning; in fact, it would not make sense at all. While the argument from both sides are equally compelling, it is clear, that despite the numerous advantages of students using their L1 in English-language learning, they do not outweigh the disadvantages. Is it possible to maximize the benefits and minimize the repercussions? Part II will provide suggestions for using the mother tongue judiciously in the English-language classroom. Disadvantages of using the mother tongue However, it is just this kind of tendency that could lead to the development of an excessive dependency on the students’ mother tongue (Harbord, 1992) by both teachers and students. Consequently, students lose confidence in their ability to communicate in English: They may feel that the only way they would understand anything the teacher says is when it has been translated, or they use their mother tongue even when they are perfectly capable of expressing the same idea in English. This can significantly reduce students’ opportunities to practice English, and students fail to realise that using English in classroom activities is essential to improve their language skills. Translation also regularly creates the problem of oversimplification because many cultural and linguistic nuances cannot be directly translated (Harbord, 1992). For example, the sentence, â€Å"That’s so cool! † in English means that something is amazing or incredible. This phrase is the product of the continual evolution of the English language that was affected by the specific culture at a certain time. A direct translation of this sentence into Chinese, for example, would not have the same meaning; in fact, it would not make sense at all. While the argument from both sides are equally compelling, it is clear, that despite the numerous advantages of students using their L1 in English-language learning, they do not outweigh the disadvantages. Is it possible to maximize the benefits and minimize the repercussions? Part II will provide suggestions for using the mother tongue judiciously in the English-language classroom.

Village Of Skokie Vs. The Aclu Essays - Skokie Controversy

Village Of Skokie Vs. The Aclu Skokie In the case of Village of Skokie vs. The ACLU(American Civil Liberties Union) I would definitely stand with the ACLU. The ACLU was defending the First Amendment Right. They were not defending the Nazis. We might not agree with what the Nazis are saying but, they still have a right to say it. Herb Lewison of the ACLU and the attorney for Collin stated to the judge ?Your Honor, this is a simple First Amendment case. The Village of Skokie seeks and order, preventing the exercise of free speech before the speech has even occurred, in spite of the fact that it has been proposed as an orderly exercise, taking place for only 20 minutes on public property in front of the Skokie Municipal Building.? This section of the quote from Herb Lewison is simply saying that Skokie is just trying take away the first amendment right of the Nazis. Everything that they are asking for falls within their first amendment right. All they are just proposing is an orderly march. An orderly march for 20 minutes on public property. This is okay in my opinion because everything is offensive to someone. But you still have the right to voice your opinion. The second quote Lewison states is, ?This is a classic case in which government officials are asking a court of equity to impose a prior restraint on the speech of persons advocating unpopular ideas.? Lewison is saying in this part of his summary argument that the government is asking the court to issue a prior restraint on the speech because they don't agree with their ideas. Another part of his quote states ?The Village of Skokie has shown only that the political views of Collin and his party are offensive and outrageous, which of course they are. They have failed to show any reason that the defendant planned to engage in any sort of illegal activity whatsoever.? Lewison shows a very good understanding of the case he is involved in. He knows that Collin's views are stupid and have no place in society. But Collin has made no threats to do anything illegal in his rally or march. All of the threats of violence have been made against him understandably. I strongly support Herb Lewison on this case. One of the best quotes in this whole legal battle came from the Judge who said, ?I believe he (Collin) intends to make trouble, to incite to riots and cause bodily harm. The Constitution certainly doesn't give a person like Collin the right to come into a peaceful community and cause violence?. The Judge is looking at this from a point of view that most people would it is a very good analysis of what Collin intends to do. I understand the Judge on his standpoint but, like Lewison said he has not made any threat of illegal activity. I still say Collin has the right to speak under the First Amendment. I support the ACLU. No matter how brainless your statements might be you have the right to say it. If I wanted to say something and someone doesn't agree should I not be allowed to say it, truth or no truth to what I'm saying.