Prototype Modeling of Smart Grid Technology at Ciit Lahore

Prototype Modeling of Smart Grid Technology at Ciit Lahore CHAPTER 1 INTRODUCTION TO SMART GRID 1.1 Introduction 1.1.1 Definition: The smart grid system is vast collection of technologies to provide an electricity network having the ability to solve the major issues related to reliability, cost effectiveness of electric power and decentralization or grid dependency The smart grid technology using renewable energy sources transferred electricity towards user side with the concept of integration of renewable energy sources. 1.1.2 Why Smart Grid Technology Adopted The demand of electricity is increased so much by the passage of time, which creates some major problems related to conventional electricity network. By 2020 energy demand will be doubled from the present demand [1]. Smart grid is the result of such efforts which are performed to make availability of electricity more reliable, economical and user friendly with the concept of decentralized network due to two way communication of electricity through network[2]. The Architectural model of a 21st century power system that interconnects everyone to affordable, abundant, clean, reliable, and efficient electricity anytime, anywhere. The purpose of Smart Grid is also to integrate several renewable resources with our national Grid and enhances the efficiency; reliability and thus providing a hassle free Transmission of electric power. It also contributes to reduce carbon emissions and providing a pollution free environment. 1.2 Back Ground 1.2.1 The European Development in the Area of Smart Grid In the next three decades European member state will expend about 750 billion in power infrastructure. This amount will expend on generation and networks. The European Technology plate form was developed in 2005 to solve the problems of Network Owners, operators and users[3]. 1.2.2 Smart Grid Development in USA In USA the Smart grid developments initiated during first Bush Administration[4]. In 2002 a DOE study describes the hundred of million of Dollar spent In US power systems on transmission practices and results a proposal of construction of transformed national electricity grid upto2030 providing the best and secure transmission of electricity[5]. 1.2.3 Smart Grid Development in Australia Under the Energy Transformed Flagship the Intelligent Grid Program was launched on 19 Aug, 2008. This Program researched in the fields of Control methodologies and economic modeling for distributed generation, Social impact of Intelligent grid, New housing developments and micro grids[6]. 1.3 Design Description 1.3.1 Features of Smart Grid The most important features of Smart Grid Technology are: Integration of Renewable Sources Battery Storage option Provide electric power to both AC and DC loads Advance Monitoring 1.3.2 Proposed Methodology Above figure shows prototype modeling of smart grid system at micro level along with the integration of several renewable energy resources such as small wind plant and solar panels. The charge controllers are special devices used for the purpose to control the abrupt change in voltage and stop the reverse flow of current towards PV or wind turbine systems, and also control the charging and discharging of batteries. An integrator is also one of the most important components of our project. The function of this device to integrate powers from both energy sources in a way that during operating time of the sources loads will directly get power from these sources and at night or the time when these sources are not operating loads are facilitated through battery banks. 1.4 Advantages of Smart Grid A. Motivates and Includes the Consumer Smart Grid is a end user device it motivates the consumer to generate a free source of electricity and to utilize it in household appliances when electricity from Grid is not available. B. Provides Power Quality for 21st Century Needs It provides power free of disturbance, sags, interruptions and spikes. C. Markets Opportunities Smart grid supports energy markets that encourage both investment and innovation. D. Operates Efficiently and Optimizes Assets Smart grid is easy to install infrastructure, transmit more power through existing systems and optimizes easily with present grid. E. Reduction in cost of power infrastructure When renewable energy sources are infused into the power grid, end-use demands can be adjusted to available power supplies. The ability to manage and reduce peak demands demolishes the need for costly peaking and â€Å"just-in-case† power infrastructure. F. Reduced use of polluting plants Some existing powerplants are not environment friendly which is adversely affecting the environment around us. Smart grid can produce pollution free generation of electricity. G. Clean power market During serious air pollution alerts, power plants and heavy industries sometimes shut down. Smart Grid ensures you clean power options. H. Energy storage Smart Grid is also equipped with battery backup options which not only stores energy also used as grid shock absorbers as well. I. Integrate able with Energy Resources and Storage Options The system also enables plug-and-play interconnection to multiple energy resources and storage devices (e.g. solar, wind, battery storage, etc.) 1.5 Brief Introduction to chapters Chapter 2 This chapter is a survey report about renewable energy sources. Also wind and solar characteristics of Pakistan are given in this chapter. Supply and Demand gap also discussed in this chapter. Chapter 3 This chapter is about PV system. Complete introduction and types of PV system are discussed also given here the architecture model of PV system with design description. And the experimental values also mentioned in this chapter. Chapter 4 This chapter defines the wind turbine specifications. Chapter starts from introduction then history discussed and after that design description is completely described. The experimental values also given in this chapter with advantages and drawbacks of wind turbine technology. Chapter 5 This chapter covers the remaining portion of smart grid technology. First of all integrator is discussed with design after that charge controller and power inverters also discussed with there design and circuitry. CHAPTER 2 LITERATURE SURVEY Contents: World Wide Survey of Renewable Energy Demand Supply Gap in Pakistan Depletion in Oil and Gas Energy Sources in Pakistan Wind Energy Solar Energy 2.1 World Wide Survey of Renewable Energy Renewable energy has an essential contribution in world energy generation. So many projects are under consideration regarding to renewable energy. 2.1.1 Global Status Report This report describes the market condition, investment and targets as well as policies. The report doesnt describe analysis or conclusions, though it reveals some extra ordinary facts regarding the renewable energy . By the end of 2005 only 45 countries were included in the achievement of renewable energy targets which are increased up to 76 in 2009. According to this report last year was the best era for renewable energy. Capacity in developing countries grew to 119GW, or 43% of the total. Including Pakistan and magnolia less or more than 8-0 countries has started plantation of wind power plants at commercial measures[7]. Some achievements of the year 2008 are: In just 1 year the capacity of solar photovoltaic plants tripled to 3 GW from 200 KW. Wind power by 29% and solar hot water increased by 15%. Grid connected photovoltaic systems increased up to 13GW, wind energy grew up to 250%, 121GW and total power generation capacity from renewable energy boost up to 75%. Spain becomes the super power in the field of grid connected PV systems with inclusion of 2.6GW. Germany also takes some handy steps and added 1,5GW in their system. Some other developed countries also provide large contributions like USA(3ooMW), Italy ( 300MW) , South Korea ( 270MW) and Japan (240MW) respectively . in total 16GW is the generation of solar including off-grid by 2009 worldwide. Table2.1 Energy Added and Exists in 2009-2010 2.2 Demand Supply gap in Pakistan If we give a look at demand supply graph then we will come to know that the difference between demand and supply is becoming wider and wider by the passage of time .the scenario in 3rd world countries is totally discriminated e.g. Pakistan. Needs are increasing exponentially but we are desperately lacking in finding out a good solution. if we have an eye view we may find 3 reasons of demand supply gap. Increase in prices of oil and gas , increase in population and increase in cost of energy . 2.2.1 Energy Demand With the increase in population energy requirements are also increasing. All the industry and the production of our daily need in dependent upon electricity . 2.2.2 Energy Supply Current eras total production of energy does not meet the current requirement of energy , though the end results are critical in the sense of increase in demand supply gap . Serious steps are needed to be 2.2.3 Energy cost If we have eye view on last few decades we will come to see the highlighted reduction in the reserves of oil and natural gas, which causes the increase in the cost of per unit production of electricity. This is also the reason of widening the demand supply gap. 2.2.4 Sustainability level The systems which are to be used for the generation of electricity must be stable, but unfortunately we have not surety of sustainability level of present system and the graph is gradually decreasing according to our present and future demands . This decrease in sustainability may overcome by using alternative techniques. 2.3 Depletion in oil and gas A large amount of electricity is being produced by fossil fuels and the present value of electricity generated by fossil fuels is increasing. According to the European energy commission and International energy the present reservoirs of oil and gas are not sufficient enough to meet the future requirements. so as the result after 10-12 years we have the depletion in the percentage of Oil using for the generation of electricity as shown in fig 2.2. As from the above it is obvious that from 1930 to one word till 2010 there is continuous growth in both oil and gas reserves but after 2010 there is deep declined. If the above graph follows the same pattern there is near future we will be totally dependent upon alternates of energy generation. 2.4 ENERGY SOURCES IN PAKISTAN The primary energy supplies today are not enough to meet even the present demand. More, a very large part of rural area does not have the electricity facilities because they are too expensive to be connected to the national grid. So, Pakistan like other developing countries in the region is facing a severe challenge in energy deficit. The development of renewable energy sources can play an important role in meeting such challenge. If we see around yourself Pakistan best suits for Solar (PV, thermal), water, wind and Wastes. These are the best renewable sources and Pakistan doesnt lack these. Pakistan can b benefited from these as substitute energy in areas where these renewable sources exist. Renewable energy Fossil fuels Nuclear power 2.4.1 Renewable energy It is energy which is produced by natural sources such as wind rain solar and geothermal heat. 2.4.1.1 Types of renewable Energy Wind Biomass Solar Wave and tidal Geothermal These all sources are best placed in Pakistan and we are not lacking in any at all , thus we can produce great amount of energy using these renewable sources , Capturing renewable energy by animals , plants and humans does not permanently deplete the resource. Fossil fuels are renewable but on a very long time-scale, are exploited at rates that may deplete these resources in the near future. 2.4.2 Fossil Fuels It includes natural gas, oil and coal . fossil fuels are lacking in Pakistan as well the world therefore renewable sources are needed to meet th essential needs 2.5 Wind Energy Wind energy is one of the best of renewable sources and probably suits Pakistan atmosphere at peak. As our project is related to wind energy as well. In Pakistan wind energy projects are working under the Pakistan Meteorological Dept with the financial collaboration of Ministry of Science and Technology which are accomplishing many such projects in Pakistan. About 3% of the total Pakistans land area is termed as good to excellent for utility scale production of electricity. Fig2.3. shows the variations of wind speeds in different areas of Pakistan Average wind speed in Lahore is 3m/s as shown in Fig.2.4 . Therefore for the prototype smart Grid system, average wind speed must exceeds the theoretical values as given in[10]. 2.6 Solar energy Its one of the types of renewable energies, as in our project we are working on solar energy, in photovoltaic system solar cells covert sun radiation to DC electricity. The provinces of Sindh , Punjab and Baluchistan and the Thar desert are specially suited for the utilization of solar energy. The solar statistics in Pakistan is highly favourable for energy generation. According to Fig2.5. the South western province offers perfect condition for utilization of solar energy. Since Pakistan locates near the equator so it has relatively high UV index as compared to other regions of the World. The solar characteristics graph in the Lahore region is shown in Fig. 2.6. Lahore city also offers suitable condition for harnessing solar energy The average sunlight hours lies between 7 to 8 hours per day which is approximately 2700 hours per annually. Graph in Fig. 3 shows the UV index of Lahore during a day time in the month of April. Usually the radiation intensity has its maximum value at noon .And value of solar radiation reaches its maximum value during the mid of summers. Chapter No 3 PHOTOVOLTAIC SYSTEM Contents: Introduction to solar panels History of PV system Photovoltaic Cell Architecture Implementation of PV system Battery 3.1 Introduction: Solar cell or photovoltaic cell is the device use to convert sunlight into electricity. It works on the basic principle of photovoltaic effect. 3.1.1 Photovoltaic effect When the photons of light falls on the semiconductor material. The photons try to knockout the electrons from the conduction bands. As the energy gap between valence and conduction band increases and when a sufficient amount of energy is projected by the light photons .the electrons knocked out from their respective atom and started to move freely. These free electrons moves towards n-side and holes created due to the deficiency of electrons in this region moves towards p-side to recombine themselves .This difference of potential allows the flow of current. The PV cell absorbs incoming light photons in p-type. This p-type layer should be synchronized in such a way that it can absorb as many as photons possible and set free as many as electrons possible, to make a radiant flow of current. In order to make and efficient flow solar cell , the surface of the cell should be kept rough to maximize the absorption of photons while reflection should be minimized in this way maximum conduction can be achieved 3.2 History The photovoltaic cell was developed in 1954 at Bell Laboratories. The first highly efficient solar cell was developed by Daryl Chapin, Calvin Souther Fuller and Gerald Pearson in year 1954 using a diffused silicon p-n junction. Firstly, cells were developed for toys and other minor uses, as the cost of their production was very high. Design of solar cells is improved day by day to utilize it for more applications. The applications for that solar panels are used are different and there are three levels of generation 3.2.1 First Generation: First generation cells are single junction devices and they have large area also having high quality with reduction in production cost 3.2.2 Second Generation: These materials are developed to address energy requirements and production cost. They reduce high temperature processing as vapour deposition, electroplating and Ultrasonic nozzles. 3.2.3 Third Generation: The aimof these technologies is to improve poor electrical performance of second generation technologies with low production cost. 3.3 Photovoltaic cell architecture A PV module consists of a silicon cell .These cell are connected in series or parallel manner in order to produce desired voltage and current .Inside a PV cell a circuit is present that is sealed from the envoi metal protective lamination .A PV panel consists of one or more modules joined together. Finally these panels are combined to make a single PV array which is a complete electricity producing unit. The performance of a PV array or its modules is rated by its maximum throughput power under S.T.C (Standard Test Condition).STC is defined as when a PV modulecell is operated under 25  °C (77F), with an incident solar irradiation of 1000 W/m2 with the spectral distribution of 1.5 air mass. These are the perfect condition for a PV module to operate in , but in actual the performance of a PV module is almost 80 to 90 percent of its STC rating. The operating lifetime of a PV module is between 20 to 30 years .Most of the manufactures offers warranty of 20 or more years of its DC output power to a sustainable amount .PV modules are also lice censed under (UL) qualification test for its reliability checks. 3.3.1 Types of Solar Cell Now a days there are various types of cell materials are developed. Multi junction PV cells are made in order to increase the cell efficiency while decreasing its volume and weight. But they are far more expensive then an ordinary silicon cells. The maximum efficiency of a PV cell is achieved almost to 30 percent by doping different intrinsic material together .Example of the exotic materials are Gallium arsenide and Indium serenade etc. However silicon cells are the most common and widely used PV cells. There are three major types of Silicon cell: Amorphous silicon solar Cell or Thin Film Cell Mono-crystalline Wafers Poly crystalline Cell Amorphous Silicon Solar Cell Amorphous technology is often seen in small devices, such as those in garden lamps or calculators, although amorphous panels are also increasingly used in other larger applications. They are formed by depositing a thin film of silicon onto a sheet of different material such as steel. The panel formed as one piece and each cell is not as visible as in other types. Efficiency of an amorphous solar cell is between 6 and 8%. The Lifetime of an amorphous cell is however shorter than that of crystalline cell. Amorphous cells have current density of about 15 mA/cm2,and the voltage of the cell without any connected load is 0.8 V, which is more as compared to crystalline cells. The efficiency of amorphous solar panels is low as those made from individual solar cells, although improvement has been made over recent years to a point where they can be use as a practical alternative to panels made with crystalline cells. Crystalline silicon solar cell The maximum efficiency of silicon solar cell is around 23 %, by adding some other semi-conductor materials it can increase up to 30 %, it depends on wavelength and semiconductor material being used. Crystalline solar cells are made up of wafers like stuff, which has about 0.3 mm thick and diameter of 10 to 15 cm. They can generate approximately 35 mA of current per cm2 of area at voltage of about 550 mV at full illumination. Crystalline solar cells can be wired in series or parallel to produce a solar panel. As each cell produces a voltage of between 0.5 and 0.6 Volts, 36 cells equipped in series are needed to produce an open-circuit voltage of about 20 Volts. This is enough to charge a 12 Volt battery under certain conditions. Although the efficiency of mono-crystalline cells is slightly higher as compared to that of a polycrystalline cells, but there are some practical difference in their performance. Crystalline cells have longer lifetime than that of amorphous solar cells. In our project we have used crystalline silicon cell because they are more efficient yet lesser in volume as compared to other types of solar cell, easily available in market and it is more economical. Polycrystalline Cell Polycrystalline silicon, also called poly silicon , consists of small silicon crystals of Polycrystalline cells which can be recognized by a visible grain, a â€Å"metal flake effect†. Semiconductor grade (solar grade) polycrystalline silicon then form to single crystal silicon, that is randomly associated crystallites of silicon in polycrystalline silicon are converted to a large single crystal[11]. Single crystal silicon is used in manufacture most of Si-based microelectronic devices. Polycrystalline silicon can be available up to 99.9999% pure. 3.4 Implementation of PV system: 3.4.1 Types of PV system There are three types of PV system being implemented around the world depending upon its function and integration with other energy resources. Standalone PV system Grid Connected PV system Hybrid Systems Stand alone PV system This type of system is usually present in our wrist watches, calculators and in space crafts also. These are dependent totally on its self generated power through solar panels and are directly used by DC loads or AC loads through inverter. In some system battery bank is also available to store the unused power to facilitate loads during night or under low light conditions. Further more a charge controller is also required in order to avoid battery from over charging and deep discharging. An inverter is also employed to provide power to AC loads. Grid Connected PV system In grid connected type the PV module has also backed up with WAPDA line or Grid connection. In this way if load is not getting enough power from the PV module or its battery, it will switch to the WAPDA line. This type of system is most commonly used around the World. Its applications are found mostly in small industries and homes. Hybrid System In this type the PV system is also integrated with two or more type of energy resources which may or may not be renewable resources .For example a wind turbine, steam engine or a small hydro plant etc. Other energy sources can also be integrated depending upon climate, geographical location of the place and several other perspectives. These systems are more appropriate for remote applications such as military installation, communication stations and rural villages. 3.4.2 Design Methodology Our project is based on a Hybrid System Consisting of a PV module and a windmill as two renewable energy resources, we have chosen these sources keeping in mind the climate and terrain of Lahore. 3.4.2.1 Components of Photovoltaic system: Solar cell Panel Inverter Charge Controller Batteries Integrator The major component of our system is the integrator .The function of this device is to integrate powers from both energy sources in a way that during operating time of the sources loads will directly get power from these sources and at night or the time when these sources are not operating loads are facilitated through battery banks. A controller is placed in the integrator circuit that is continuously monitoring the voltage level being provided by the sources. If the load can operate single handed by either of the sources the rely will build its connection from load with that source while the energy generated by the second source is being stored in the batteries .If both sources are required to derive a certain load rely opens up its connection of both sources with the load. When both sources are not providing a sufficient amount of power to the loads the controller will check whether batteries could provide sufficient amount of voltage so, it will start delivering power to load from the battery bank otherwise an LED blinks indicating that system cannot provide sufficient amount of power and will shutdown eventually. 3.4.2.2 Solar Panel Characteristics Table 3.1. Solar Panel Characteristics 3.4.2.3 Experimental Values This table shows the experimental results of output voltage and output current with respect to different timings and temperature variations in a day. Table 3.2. Solar Panel Throughput 3.4.2.4 Factors Affecting Output Power STC(Standard Test Condition) The electricity produce by solar cell is in DC, the DC output of solar panel is Tested under the STC that is Cell Temperature= 25 °C Solar Radiation Intensity= 1000 W/m2.. Air Mass= 1.5 These are the standard test condition at which Solar cell gives its Maximum Efficiency, in other conditions there is almost 10 to 15 percent of decrease in the efficiency of cell with respect to its STC rating. Temperature Output power of the solar cell is inversely proportion to the increase in temperature of the cell. For a crystalline module , a typical temperature reduction factor proposed by CEC is 89 percent which means †95 watts† module will typically provide 85 Watts (95watts*0.89=85watts) under sunlight conditions during summer seasons. Mismatch and wiring Losses The performance of the system can be affected due to mismatch of module connections. The loss in power also depends upon the increase in length of wire between source and load. As the distance between source and load increases losses also increases. Therefore the distance should be kept minimal to get maximum power throughput. DC To AC conversion Losses Since our system Prototype Modeling of Smart Grid Technology at Ciit Lahore Prototype Modeling of Smart Grid Technology at Ciit Lahore CHAPTER 1 INTRODUCTION TO SMART GRID 1.1 Introduction 1.1.1 Definition: The smart grid system is vast collection of technologies to provide an electricity network having the ability to solve the major issues related to reliability, cost effectiveness of electric power and decentralization or grid dependency The smart grid technology using renewable energy sources transferred electricity towards user side with the concept of integration of renewable energy sources. 1.1.2 Why Smart Grid Technology Adopted The demand of electricity is increased so much by the passage of time, which creates some major problems related to conventional electricity network. By 2020 energy demand will be doubled from the present demand [1]. Smart grid is the result of such efforts which are performed to make availability of electricity more reliable, economical and user friendly with the concept of decentralized network due to two way communication of electricity through network[2]. The Architectural model of a 21st century power system that interconnects everyone to affordable, abundant, clean, reliable, and efficient electricity anytime, anywhere. The purpose of Smart Grid is also to integrate several renewable resources with our national Grid and enhances the efficiency; reliability and thus providing a hassle free Transmission of electric power. It also contributes to reduce carbon emissions and providing a pollution free environment. 1.2 Back Ground 1.2.1 The European Development in the Area of Smart Grid In the next three decades European member state will expend about 750 billion in power infrastructure. This amount will expend on generation and networks. The European Technology plate form was developed in 2005 to solve the problems of Network Owners, operators and users[3]. 1.2.2 Smart Grid Development in USA In USA the Smart grid developments initiated during first Bush Administration[4]. In 2002 a DOE study describes the hundred of million of Dollar spent In US power systems on transmission practices and results a proposal of construction of transformed national electricity grid upto2030 providing the best and secure transmission of electricity[5]. 1.2.3 Smart Grid Development in Australia Under the Energy Transformed Flagship the Intelligent Grid Program was launched on 19 Aug, 2008. This Program researched in the fields of Control methodologies and economic modeling for distributed generation, Social impact of Intelligent grid, New housing developments and micro grids[6]. 1.3 Design Description 1.3.1 Features of Smart Grid The most important features of Smart Grid Technology are: Integration of Renewable Sources Battery Storage option Provide electric power to both AC and DC loads Advance Monitoring 1.3.2 Proposed Methodology Above figure shows prototype modeling of smart grid system at micro level along with the integration of several renewable energy resources such as small wind plant and solar panels. The charge controllers are special devices used for the purpose to control the abrupt change in voltage and stop the reverse flow of current towards PV or wind turbine systems, and also control the charging and discharging of batteries. An integrator is also one of the most important components of our project. The function of this device to integrate powers from both energy sources in a way that during operating time of the sources loads will directly get power from these sources and at night or the time when these sources are not operating loads are facilitated through battery banks. 1.4 Advantages of Smart Grid A. Motivates and Includes the Consumer Smart Grid is a end user device it motivates the consumer to generate a free source of electricity and to utilize it in household appliances when electricity from Grid is not available. B. Provides Power Quality for 21st Century Needs It provides power free of disturbance, sags, interruptions and spikes. C. Markets Opportunities Smart grid supports energy markets that encourage both investment and innovation. D. Operates Efficiently and Optimizes Assets Smart grid is easy to install infrastructure, transmit more power through existing systems and optimizes easily with present grid. E. Reduction in cost of power infrastructure When renewable energy sources are infused into the power grid, end-use demands can be adjusted to available power supplies. The ability to manage and reduce peak demands demolishes the need for costly peaking and â€Å"just-in-case† power infrastructure. F. Reduced use of polluting plants Some existing powerplants are not environment friendly which is adversely affecting the environment around us. Smart grid can produce pollution free generation of electricity. G. Clean power market During serious air pollution alerts, power plants and heavy industries sometimes shut down. Smart Grid ensures you clean power options. H. Energy storage Smart Grid is also equipped with battery backup options which not only stores energy also used as grid shock absorbers as well. I. Integrate able with Energy Resources and Storage Options The system also enables plug-and-play interconnection to multiple energy resources and storage devices (e.g. solar, wind, battery storage, etc.) 1.5 Brief Introduction to chapters Chapter 2 This chapter is a survey report about renewable energy sources. Also wind and solar characteristics of Pakistan are given in this chapter. Supply and Demand gap also discussed in this chapter. Chapter 3 This chapter is about PV system. Complete introduction and types of PV system are discussed also given here the architecture model of PV system with design description. And the experimental values also mentioned in this chapter. Chapter 4 This chapter defines the wind turbine specifications. Chapter starts from introduction then history discussed and after that design description is completely described. The experimental values also given in this chapter with advantages and drawbacks of wind turbine technology. Chapter 5 This chapter covers the remaining portion of smart grid technology. First of all integrator is discussed with design after that charge controller and power inverters also discussed with there design and circuitry. CHAPTER 2 LITERATURE SURVEY Contents: World Wide Survey of Renewable Energy Demand Supply Gap in Pakistan Depletion in Oil and Gas Energy Sources in Pakistan Wind Energy Solar Energy 2.1 World Wide Survey of Renewable Energy Renewable energy has an essential contribution in world energy generation. So many projects are under consideration regarding to renewable energy. 2.1.1 Global Status Report This report describes the market condition, investment and targets as well as policies. The report doesnt describe analysis or conclusions, though it reveals some extra ordinary facts regarding the renewable energy . By the end of 2005 only 45 countries were included in the achievement of renewable energy targets which are increased up to 76 in 2009. According to this report last year was the best era for renewable energy. Capacity in developing countries grew to 119GW, or 43% of the total. Including Pakistan and magnolia less or more than 8-0 countries has started plantation of wind power plants at commercial measures[7]. Some achievements of the year 2008 are: In just 1 year the capacity of solar photovoltaic plants tripled to 3 GW from 200 KW. Wind power by 29% and solar hot water increased by 15%. Grid connected photovoltaic systems increased up to 13GW, wind energy grew up to 250%, 121GW and total power generation capacity from renewable energy boost up to 75%. Spain becomes the super power in the field of grid connected PV systems with inclusion of 2.6GW. Germany also takes some handy steps and added 1,5GW in their system. Some other developed countries also provide large contributions like USA(3ooMW), Italy ( 300MW) , South Korea ( 270MW) and Japan (240MW) respectively . in total 16GW is the generation of solar including off-grid by 2009 worldwide. Table2.1 Energy Added and Exists in 2009-2010 2.2 Demand Supply gap in Pakistan If we give a look at demand supply graph then we will come to know that the difference between demand and supply is becoming wider and wider by the passage of time .the scenario in 3rd world countries is totally discriminated e.g. Pakistan. Needs are increasing exponentially but we are desperately lacking in finding out a good solution. if we have an eye view we may find 3 reasons of demand supply gap. Increase in prices of oil and gas , increase in population and increase in cost of energy . 2.2.1 Energy Demand With the increase in population energy requirements are also increasing. All the industry and the production of our daily need in dependent upon electricity . 2.2.2 Energy Supply Current eras total production of energy does not meet the current requirement of energy , though the end results are critical in the sense of increase in demand supply gap . Serious steps are needed to be 2.2.3 Energy cost If we have eye view on last few decades we will come to see the highlighted reduction in the reserves of oil and natural gas, which causes the increase in the cost of per unit production of electricity. This is also the reason of widening the demand supply gap. 2.2.4 Sustainability level The systems which are to be used for the generation of electricity must be stable, but unfortunately we have not surety of sustainability level of present system and the graph is gradually decreasing according to our present and future demands . This decrease in sustainability may overcome by using alternative techniques. 2.3 Depletion in oil and gas A large amount of electricity is being produced by fossil fuels and the present value of electricity generated by fossil fuels is increasing. According to the European energy commission and International energy the present reservoirs of oil and gas are not sufficient enough to meet the future requirements. so as the result after 10-12 years we have the depletion in the percentage of Oil using for the generation of electricity as shown in fig 2.2. As from the above it is obvious that from 1930 to one word till 2010 there is continuous growth in both oil and gas reserves but after 2010 there is deep declined. If the above graph follows the same pattern there is near future we will be totally dependent upon alternates of energy generation. 2.4 ENERGY SOURCES IN PAKISTAN The primary energy supplies today are not enough to meet even the present demand. More, a very large part of rural area does not have the electricity facilities because they are too expensive to be connected to the national grid. So, Pakistan like other developing countries in the region is facing a severe challenge in energy deficit. The development of renewable energy sources can play an important role in meeting such challenge. If we see around yourself Pakistan best suits for Solar (PV, thermal), water, wind and Wastes. These are the best renewable sources and Pakistan doesnt lack these. Pakistan can b benefited from these as substitute energy in areas where these renewable sources exist. Renewable energy Fossil fuels Nuclear power 2.4.1 Renewable energy It is energy which is produced by natural sources such as wind rain solar and geothermal heat. 2.4.1.1 Types of renewable Energy Wind Biomass Solar Wave and tidal Geothermal These all sources are best placed in Pakistan and we are not lacking in any at all , thus we can produce great amount of energy using these renewable sources , Capturing renewable energy by animals , plants and humans does not permanently deplete the resource. Fossil fuels are renewable but on a very long time-scale, are exploited at rates that may deplete these resources in the near future. 2.4.2 Fossil Fuels It includes natural gas, oil and coal . fossil fuels are lacking in Pakistan as well the world therefore renewable sources are needed to meet th essential needs 2.5 Wind Energy Wind energy is one of the best of renewable sources and probably suits Pakistan atmosphere at peak. As our project is related to wind energy as well. In Pakistan wind energy projects are working under the Pakistan Meteorological Dept with the financial collaboration of Ministry of Science and Technology which are accomplishing many such projects in Pakistan. About 3% of the total Pakistans land area is termed as good to excellent for utility scale production of electricity. Fig2.3. shows the variations of wind speeds in different areas of Pakistan Average wind speed in Lahore is 3m/s as shown in Fig.2.4 . Therefore for the prototype smart Grid system, average wind speed must exceeds the theoretical values as given in[10]. 2.6 Solar energy Its one of the types of renewable energies, as in our project we are working on solar energy, in photovoltaic system solar cells covert sun radiation to DC electricity. The provinces of Sindh , Punjab and Baluchistan and the Thar desert are specially suited for the utilization of solar energy. The solar statistics in Pakistan is highly favourable for energy generation. According to Fig2.5. the South western province offers perfect condition for utilization of solar energy. Since Pakistan locates near the equator so it has relatively high UV index as compared to other regions of the World. The solar characteristics graph in the Lahore region is shown in Fig. 2.6. Lahore city also offers suitable condition for harnessing solar energy The average sunlight hours lies between 7 to 8 hours per day which is approximately 2700 hours per annually. Graph in Fig. 3 shows the UV index of Lahore during a day time in the month of April. Usually the radiation intensity has its maximum value at noon .And value of solar radiation reaches its maximum value during the mid of summers. Chapter No 3 PHOTOVOLTAIC SYSTEM Contents: Introduction to solar panels History of PV system Photovoltaic Cell Architecture Implementation of PV system Battery 3.1 Introduction: Solar cell or photovoltaic cell is the device use to convert sunlight into electricity. It works on the basic principle of photovoltaic effect. 3.1.1 Photovoltaic effect When the photons of light falls on the semiconductor material. The photons try to knockout the electrons from the conduction bands. As the energy gap between valence and conduction band increases and when a sufficient amount of energy is projected by the light photons .the electrons knocked out from their respective atom and started to move freely. These free electrons moves towards n-side and holes created due to the deficiency of electrons in this region moves towards p-side to recombine themselves .This difference of potential allows the flow of current. The PV cell absorbs incoming light photons in p-type. This p-type layer should be synchronized in such a way that it can absorb as many as photons possible and set free as many as electrons possible, to make a radiant flow of current. In order to make and efficient flow solar cell , the surface of the cell should be kept rough to maximize the absorption of photons while reflection should be minimized in this way maximum conduction can be achieved 3.2 History The photovoltaic cell was developed in 1954 at Bell Laboratories. The first highly efficient solar cell was developed by Daryl Chapin, Calvin Souther Fuller and Gerald Pearson in year 1954 using a diffused silicon p-n junction. Firstly, cells were developed for toys and other minor uses, as the cost of their production was very high. Design of solar cells is improved day by day to utilize it for more applications. The applications for that solar panels are used are different and there are three levels of generation 3.2.1 First Generation: First generation cells are single junction devices and they have large area also having high quality with reduction in production cost 3.2.2 Second Generation: These materials are developed to address energy requirements and production cost. They reduce high temperature processing as vapour deposition, electroplating and Ultrasonic nozzles. 3.2.3 Third Generation: The aimof these technologies is to improve poor electrical performance of second generation technologies with low production cost. 3.3 Photovoltaic cell architecture A PV module consists of a silicon cell .These cell are connected in series or parallel manner in order to produce desired voltage and current .Inside a PV cell a circuit is present that is sealed from the envoi metal protective lamination .A PV panel consists of one or more modules joined together. Finally these panels are combined to make a single PV array which is a complete electricity producing unit. The performance of a PV array or its modules is rated by its maximum throughput power under S.T.C (Standard Test Condition).STC is defined as when a PV modulecell is operated under 25  °C (77F), with an incident solar irradiation of 1000 W/m2 with the spectral distribution of 1.5 air mass. These are the perfect condition for a PV module to operate in , but in actual the performance of a PV module is almost 80 to 90 percent of its STC rating. The operating lifetime of a PV module is between 20 to 30 years .Most of the manufactures offers warranty of 20 or more years of its DC output power to a sustainable amount .PV modules are also lice censed under (UL) qualification test for its reliability checks. 3.3.1 Types of Solar Cell Now a days there are various types of cell materials are developed. Multi junction PV cells are made in order to increase the cell efficiency while decreasing its volume and weight. But they are far more expensive then an ordinary silicon cells. The maximum efficiency of a PV cell is achieved almost to 30 percent by doping different intrinsic material together .Example of the exotic materials are Gallium arsenide and Indium serenade etc. However silicon cells are the most common and widely used PV cells. There are three major types of Silicon cell: Amorphous silicon solar Cell or Thin Film Cell Mono-crystalline Wafers Poly crystalline Cell Amorphous Silicon Solar Cell Amorphous technology is often seen in small devices, such as those in garden lamps or calculators, although amorphous panels are also increasingly used in other larger applications. They are formed by depositing a thin film of silicon onto a sheet of different material such as steel. The panel formed as one piece and each cell is not as visible as in other types. Efficiency of an amorphous solar cell is between 6 and 8%. The Lifetime of an amorphous cell is however shorter than that of crystalline cell. Amorphous cells have current density of about 15 mA/cm2,and the voltage of the cell without any connected load is 0.8 V, which is more as compared to crystalline cells. The efficiency of amorphous solar panels is low as those made from individual solar cells, although improvement has been made over recent years to a point where they can be use as a practical alternative to panels made with crystalline cells. Crystalline silicon solar cell The maximum efficiency of silicon solar cell is around 23 %, by adding some other semi-conductor materials it can increase up to 30 %, it depends on wavelength and semiconductor material being used. Crystalline solar cells are made up of wafers like stuff, which has about 0.3 mm thick and diameter of 10 to 15 cm. They can generate approximately 35 mA of current per cm2 of area at voltage of about 550 mV at full illumination. Crystalline solar cells can be wired in series or parallel to produce a solar panel. As each cell produces a voltage of between 0.5 and 0.6 Volts, 36 cells equipped in series are needed to produce an open-circuit voltage of about 20 Volts. This is enough to charge a 12 Volt battery under certain conditions. Although the efficiency of mono-crystalline cells is slightly higher as compared to that of a polycrystalline cells, but there are some practical difference in their performance. Crystalline cells have longer lifetime than that of amorphous solar cells. In our project we have used crystalline silicon cell because they are more efficient yet lesser in volume as compared to other types of solar cell, easily available in market and it is more economical. Polycrystalline Cell Polycrystalline silicon, also called poly silicon , consists of small silicon crystals of Polycrystalline cells which can be recognized by a visible grain, a â€Å"metal flake effect†. Semiconductor grade (solar grade) polycrystalline silicon then form to single crystal silicon, that is randomly associated crystallites of silicon in polycrystalline silicon are converted to a large single crystal[11]. Single crystal silicon is used in manufacture most of Si-based microelectronic devices. Polycrystalline silicon can be available up to 99.9999% pure. 3.4 Implementation of PV system: 3.4.1 Types of PV system There are three types of PV system being implemented around the world depending upon its function and integration with other energy resources. Standalone PV system Grid Connected PV system Hybrid Systems Stand alone PV system This type of system is usually present in our wrist watches, calculators and in space crafts also. These are dependent totally on its self generated power through solar panels and are directly used by DC loads or AC loads through inverter. In some system battery bank is also available to store the unused power to facilitate loads during night or under low light conditions. Further more a charge controller is also required in order to avoid battery from over charging and deep discharging. An inverter is also employed to provide power to AC loads. Grid Connected PV system In grid connected type the PV module has also backed up with WAPDA line or Grid connection. In this way if load is not getting enough power from the PV module or its battery, it will switch to the WAPDA line. This type of system is most commonly used around the World. Its applications are found mostly in small industries and homes. Hybrid System In this type the PV system is also integrated with two or more type of energy resources which may or may not be renewable resources .For example a wind turbine, steam engine or a small hydro plant etc. Other energy sources can also be integrated depending upon climate, geographical location of the place and several other perspectives. These systems are more appropriate for remote applications such as military installation, communication stations and rural villages. 3.4.2 Design Methodology Our project is based on a Hybrid System Consisting of a PV module and a windmill as two renewable energy resources, we have chosen these sources keeping in mind the climate and terrain of Lahore. 3.4.2.1 Components of Photovoltaic system: Solar cell Panel Inverter Charge Controller Batteries Integrator The major component of our system is the integrator .The function of this device is to integrate powers from both energy sources in a way that during operating time of the sources loads will directly get power from these sources and at night or the time when these sources are not operating loads are facilitated through battery banks. A controller is placed in the integrator circuit that is continuously monitoring the voltage level being provided by the sources. If the load can operate single handed by either of the sources the rely will build its connection from load with that source while the energy generated by the second source is being stored in the batteries .If both sources are required to derive a certain load rely opens up its connection of both sources with the load. When both sources are not providing a sufficient amount of power to the loads the controller will check whether batteries could provide sufficient amount of voltage so, it will start delivering power to load from the battery bank otherwise an LED blinks indicating that system cannot provide sufficient amount of power and will shutdown eventually. 3.4.2.2 Solar Panel Characteristics Table 3.1. Solar Panel Characteristics 3.4.2.3 Experimental Values This table shows the experimental results of output voltage and output current with respect to different timings and temperature variations in a day. Table 3.2. Solar Panel Throughput 3.4.2.4 Factors Affecting Output Power STC(Standard Test Condition) The electricity produce by solar cell is in DC, the DC output of solar panel is Tested under the STC that is Cell Temperature= 25 °C Solar Radiation Intensity= 1000 W/m2.. Air Mass= 1.5 These are the standard test condition at which Solar cell gives its Maximum Efficiency, in other conditions there is almost 10 to 15 percent of decrease in the efficiency of cell with respect to its STC rating. Temperature Output power of the solar cell is inversely proportion to the increase in temperature of the cell. For a crystalline module , a typical temperature reduction factor proposed by CEC is 89 percent which means †95 watts† module will typically provide 85 Watts (95watts*0.89=85watts) under sunlight conditions during summer seasons. Mismatch and wiring Losses The performance of the system can be affected due to mismatch of module connections. The loss in power also depends upon the increase in length of wire between source and load. As the distance between source and load increases losses also increases. Therefore the distance should be kept minimal to get maximum power throughput. DC To AC conversion Losses Since our system

Marketing Analysis of Blizzard Entertainment Essay

Blizzard Entertainment ® is a premier developer and publisher of entertainment software. After establishing the Blizzard label in 1994, the company quickly became one of the most popular and well-respected makers of computer games. By focusing on creating well-designed, highly enjoyable entertainment experiences, Blizzard has maintained an unparalleled reputation for quality since its inception. Blizzard’s track record of back-to-back number one selling games spans more than a decade, and with blockbuster hits such as World of Warcraft ®, Warcraft ® III: Reign of Chaosâ„ ¢, Diablo ® II, and StarCraft ®, the company has earned several consecutive Game of the Year awards. In addition, Blizzard’s online-game service, Battle.net ®, is one of the largest in the world, with millions of active users. The high-quality products based on Blizzard’s games have also proven popular and garnered much critical acclaim. These products include action figures, novels, manga, board games, pen-and-paper role-playing games, apparel, and the World of Warcraft Trading Card Game, which is a bestseller in its category. Extending the reach of its game universes even further, Blizzard is currently at work with Legendary Pictures, the studio behind the feature films Batman Begins, Superman Returns, and 300, on a live-action Warcraft movie. The reason that the Blizzard became so successful on making games is that the company interacts with the customers. Firstly, all the staff of Blizzard are the game lovers, they know what is hot, and what the customers want to play and see. This will help the company knows the target market better, also give a direction for gaming development. For example, in the early 90s, when the real-time strategy games came out, Blizzard launched their Warcraft I, and quickly became popular. After the success of Warcraft I, the company launched Diablo I during the 1998 to 2000, this created the new generation of the third person role-play games, which has copied by other companies in the last ten years. Secondly, after the Blizzard’s big success of the Diablo and Warcraft, the company still wanted innovating its products and services through analyzing gamers’ information, the survey questions were posted on its homepage and other big software media, such as computer gaming world, PC gamer and computer life. They were hearing from the Diablo and Warcraft fans for their thoughts of developing new games, and what they want the next games to be. Then the glory days of Blizzard has came—— the Starcraft had launched in late 1998, and became the best real-time strategy game in the 19th century, because the game was perfectly balanced for the 3 species battle in the galaxy. Blizzard could not achieve this without analyzing what the customers want and the data which collected from the gamers. Thirdly, Blizzard is a computer games maker and also providing online gaming servers for the players, such as World of Warcraft and Starcraft. The objective of relationship is more like the cross-selling, once the games are launched by the company; they are going to the market through the dealers such as: Best Buy, Future Shop and also through online shopping, directly from the Blizzard company homepage. Furthermore, Blizzard develops and publishes its own games, then provides them into the market, so they save a lot of avoid selling its games through a publisher like EA Games. Finally, the Blizzard has achieved its success by connecting with the customers; both analyze the data from customers and hire professional gamers giving ideas for the future development. It became more and more important for the company’s marketing in the nowadays.

Halfway House Essay

The crisis of identity and breakdown of communication in human relations and resultant tragic effect of boredom and despair constitute the theme of Rakesh’s play, Aadhe Adhure, which is by far is best play, devastatingly exposing the fragmented personalities and broken images in a disintegrated society. †Ã‚  Ã¢â‚¬â€ N. Choudhuri, (Hindi Drama, Contemporary Indian Literature) Mohan Rakesh’s  Ã¢â‚¬Å"Halfway House†Ã‚  can be viewed as an exploration of meaning and identity in the turmoil of changing social and familial structures. Although the play seeks to construct the search for identity within the unfulfilling, incomplete nature of bourgeois existence as a universal non-gendered experience along Existential lines as its primary concern, it eventually deals with many questions on a broader socio-economic context on Realist lines. In the Prologue itself, the theme of exploration of identity is introduced, when ‘the Man in a Black Suit’ exclaims,  Ã¢â‚¬Å"Who am I? †Ã‚  Immediately the declaration takes an Existential tangent as the fruitlessness of such a search for meaning is asserted with the speaker claiming,  Ã¢â‚¬Å"This is a question I have given up trying to face.   He establishes the absurdity of identity by calling himself  Ã¢â‚¬Å"amorphous†Ã‚  and  Ã¢â‚¬Å"undefined†, as someone who like all of us puts on a new mask and gives a new meaning to himself for different occasions –  Ã¢â‚¬Å"The fact is that there is something of me in each one of you and that is why, whether on or off stage, I have no separate identity. †He then asserts that no matter what the circumstance, what the situation and the gender, man’s search for identity and meaning in life would always remain an absurd, indescribable, undefined and irrational oddity. Even the characters of the play are seen to engage in a constant search of meaning and identity in life. In his essay,  Ã¢â‚¬Å"Uncertain circumstances, Undefined Individuals: A study of Halfway House†, S. G. Bhanegaonkar points out that modern psychology does not regard escapism as a symbol of weakness but as a sensitive individual’s desire to search for meaning which he does not find in the conditions he is placed in; and hence, the characters of ‘Halfway House’  can too be seen as being in a relentless quest for identity that transcends the turmoil of their fragmented existence. It is in sync with R. L. Nigam’s theory, of the main characters of play being involved in a  Ã¢â‚¬Ëœself-made’  phenomenon of  Ã¢â‚¬Ëœthe soul’s search for an alternate sanctuary’  in the absence of the sanctuary of home which‘stood for a source of solace and moral stay to the individual in moments of crises. ’ The search for identity and meaning in Halfway House is best articulated through the character of Savitri who seeks fulfilment and reason in marital bliss – â€Å"Why does one get married? In order to fulfil a need†¦. an inner†¦. oid, if you like; to be self sufficient†¦. complete. †Ã‚  Since her own husbands fails to fulfil this inner emptiness, Savitri seeks marital happiness beyond conjugal relations in men who possess the qualities she had always aspired for in Mahendranath. Dilip Kumar Basu observes,â€Å"The desire to look for â€Å"completeness† in the â€Å"other† may look like Everyman’s essential and unreasolvable problem, and may vaguely place her in the centre of an Absurdist drama where the search may be considered tragic/ridiculous.   Although the concept of Savitri seeking meaning in life being defined in terms of her relations with men seems problematic in itself, the play tries to trick us into the generalisation that this is nothing but an existentialist quest for meaning in life. She is reported to be overwhelmed by Juneja’s power, affluence and sense of reason. Shivjeet’s intellectual prowess, his university degree and numerous trips abroad enamoured her. Jagmohan’s understanding nature, sense of humour, modernism, elite lifestyle and masculine pride held immense appeal for her. She was supposed to be attracted to her now son-in-law, Manoj too, as his influential status had charmed her sufficiently. Savitri moves from one man to another in search of the perfect partner. The play tries to portray this search as an illusion, an Absurdist attempt by denying Savitri the happiness she is looking for and making her realise that all men are the same and they all of them as in Kirti Jain’s wordsâ€Å"want to evade responsibility and to exploit her. † Mahendranath is shown to search for a new identity and reason behind his existence through his relationship with Juneja. The economic crisis and his losing the identity of being the bread-earner of the family had altered his position in the house into a non-entity and affected his mind and heart adversely  Ã¢â‚¬Å"†¦Ã¢â‚¬ ¦. silent acceptance, perpetual snubs, constant insults, is all that I deserve after so many years. †Ã‚  He greatly resents his loss of control and influence in the family and is immensely unhappy to be regarded  Ã¢â‚¬Å"only as a stamp of respectability to be used only when the need arises. † Under such circumstances of changed power equations, Mahendranath earches for meaning in new relations build on a sense of understanding and mutual respect, as is the case with Juneja. From Savitri’s perpetual insults and accusations and its subsequent repercussions in giving him an inferiority complex, Juneja’s friendship offered Mahendranath the alternate sanctuary of solace and comfort in the midst of an emotional and economic crisis within the family. He began to define himself in terms of his non-utility and unsuccessfulness, and thereby sought solace in temporary acts of rebellion involving leaving the house and seeking meaning and mental peace in his companionship with Juneja. Moreover due to his own lack of conviction and inability to take independent decisions, Mahendranath looked for identity assertion through psychological dependence on others and in the early years of his marriage through a patriarchal control and restriction of Savitri’s autonomy. The fact that Mahendranath finally returns in the end using his own judgement, abandoning Juneja’s advice, establishes the futility of his search and once again, reiterates the Absurdist stance the play tries to partially incorporate. Ashok and Kinni explore the dynamics of identity on their own in their own world so as to escape from the fearful existence of their wrangling parents. Ashok searches for his identity in an amorphous world, detached from reality and need, in the realm of idleness, impulsivity and romance. For no apparent reason at all, he quits his job at Air Freeze and instead spends his time either in lazing around uselessly or in courting a girl working in the Udyog Centre. The everyday animosity between his parents distorts his sense of ‘home’ and thereby he looks for meaning and identity in an alternate world free of the pressure of shouldering family responsibility and of the tensions within the family. Even the talk he has with Binni about the  Ã¢â‚¬Ëœair’  in the house echoes these sentiments about the search for meaning. The youngest character Kinni on the other hand, searches for an identity through her emerging adolescent sexuality and awareness of this sexuality, in the absence of a secure support mechanism at home, both economically and emotionally. Given the emotional instability in her house and the complete negligence with which she was treated, Kinni sought to define herself in terms of her rebelliousness, growing sexual knowledge, stubbornness, ill-mannerisms and arrogance. In the last scene, Kinni trying to get out when the door is locked from inside and others trying to get in when she locks it from inside is again symbolic of a futile quest for identity and meaning in life, for even her defiance and obstinacy fails to make things any different for the little girl. Binny too is shown to be in a relentless and shifting quest for a sanctuary, an identity. She elopes with Manoj not in an impulse of love and romantic urge but in search of an abode away from home where she presumed she would find peace and protection. But however, when she experiences her husband’s strict conservatism and fails to find any meaning   in Manoj’s restrictive control within their conjugal relation, she looks for answers in a sense of defiance –  Ã¢â‚¬Å"He likes my hair long, so I want to cut it. He doesn’t like me to work, so I want a job. †Ã‚  But this again proves futile as she realises she is unable to execute her rebellious tendencies against the sub-ordination by her husband. Ultimately, she just returns to her maternal home in search for that mysteriousâ€Å"something†Ã‚  in their house that is the  Ã¢â‚¬Å"cause of all her trouble†Ã‚  and that which refuses to desert her. However, Binni is never shown to exactly unravel this mystery  Ã¢â‚¬Ëœcause’  thereby manifesting the absurdity of the entire process of finding meaning in life. However, when their search for meaning in life and the subsequent despair and suffering is regarded only along existential lines, it thus forecloses the possibility of ever addressing the cause of the dilemma. All the characters’ quest for an identity beyond the home, the search for an alternate sanctuary besides being analysed as a technique of Absurdist Theatre can also be seen in terms of the alienation that comes with urbanization, the breakdown of joint family and the new emerging power-plays and conflicts within the nuclear family with no viable support system outside. The fact that Savitri never explores the arena of identity as an independent individual woman, a single working woman; but instead always defines herself in terms of fulfilment in her various relations with different men raises important questions about the status of women as an autonomous individual in society. To quote R. L. Nigam,  Ã¢â‚¬Å"The one solution which could have lead to joy and fulfilment, and was available to her all the time, would need for its success, a regenerated society in whose value-system personal fulfilment and interpersonal responsibilities have been harmonised. In the present social scenario, that solution would not work. † Morever, Mahendranath and Savitri not finding meaning in their relationship can also be seen as the virtual breakdown of marriage as an institution. In our fast-changing society and in the face of belated individualism of its members, the values and regards on which family and marriage have so far rested are fast losing their meaning and significance. Assertion of personal rights and freedoms within a group-unit (family) which necessarily involves inter-personal adjustments produces a situation of crisis because there are no principles to guide these adjustments, which necessarily involves inter-personal adjustments produces a situation of crisis because there are no principles to guide these adjustments which, in present context cannot be thought of in terms of surrender of one or the other party. All relations in the family need to be redefined with new structures of familial division of labour and the rise of the working women. As O. P. Sharma Prakash puts it,  Ã¢â‚¬Å"Halfway House is the crisis of dignity of the individual. Modern man demands individual dignity as well as honour of is choice†¦.. It represents the modern sensibility in all its intensity, form and dimensions. †Ã‚  The fact that Manoj blames  Ã¢â‚¬Ëœsomething’  in Binni’s maternal house as the cause of all trouble and then prevents her from working establishes that the‘something’  is in reference to her mother’s promiscuity which leads him to infer that letting women out of the house would always come with the threat of her infidelity. Moreover, Mohan Rakesh’s juxtaposition of a monogamous husband with a woman whose defining feature is her promiscuity ironically at a time when the  Ã¢â‚¬ËœHindu Marriage Act (1955)’came into force outlawing polygamy to protect the rights of Hindu women reflects the extent of male anxiety generated by women’s emancipation, whose right to work meant the dissolution of the public-private dichotomy necessary for the maintenance of the family as a private sphere. This anxiety is further elaborated in terms of portraying Kinni as an uncared neglected kid, who returns to a home without the mother and feels lonely and alienated. Mahendranath’s despair too needs to be identified not just in terms of the emotional crisis that he faces with the breakdown of familial relations and absence of mutual respect, but also the economic crisis which ultimately appears as the root of all problems. Mahendranath loses his position in family, when the roles of provider and receiver are changed, when economic equations of earner and acceptor are altered and redefined in terms of sex and gender. Their current poverty seems to be the result of typical-middle class lifestyle of living beyond one’s means, and the search or identities only arises when existing identities run into conflict with changing economic denominations of labour division within the family itself. Thus, Mahendranath’s yearning for meaning in life has new economic arrangements within the familial space and sheer inability to solve the economic crisis, triggering it. Even Ashok’s arrogance and refusal to submit to influential people, Dilip Kumar Basu feels can be analysed in the backdrop of  Ã¢â‚¬Å"1969 youth revolts in Paris, and things happening in our country.   The young man’s indifference to work is thus to be constructed as a larger question of youth rebellion and mobilisation, than just mere laziness and irresponsibility or a mere existentialist search for identity. Hence, in conclusion, it can be said that although Mohan Rakesh’sâ€Å"Halfway House†Ã‚  deals extensively with the question of identity and meaning in life, to situate it solely in an Existentialist dimension and accord it the distinction of being the primary concern of the play, would unfairly downplay many other socio-economic themes that the play encompasses.

ANGER essays

ANGER essays The liquor was beginning to hit me, and the hours were falling from 3 to 2 to 1, and thats about the time my anger begun. Realizing I had a little more room for drinking before it all plumages out my throat, I decided to walk to my car with a few of my friends and grab more drinks. Stumbling through the crowd I was anxious to occupy my hand with another beer. Swarming through the living room I walked out the front door and my jaw hit the ground as I saw my dented car. My anger couldnt be expressed verbally staring at my car parked and dented! What a way to bring in the New Year I thought to myself. I started yelling frantically as the liquor started doing its work. I quickly called the police, the best thing I could do was to file a report Id thought. A little under ten minutes had passed when I saw the police car approach me turning onto the street. While explaining my case to the officer I could see that he wasnt buying it as he started explaining that without witnesses nothing could be done. What a terrible night tonight was going to be. Whats done is done my friend tells me, You might as well enjoy your night. Once I had filled out the police report and was once again approaching the party I had decided to start fresh and act as if this had never happened. With a beer in one hand, and a bottle of jack in the other, I made my way through the front door and towards the backyard. Just in time for the countdown, my alcohol level is now through the roof as the excitement of yet another year takes over the party. As soon as the year had ended and another had begun I started to once again think about my car. Everything after that moment was kind of a blur. The rest of the night kind of faded away as I dwelled on my misfortune. But I can definitely recall waking up the next morning and getting a call from my friend who had the ...

Free sample - Assessment by Portfolio and Standardized Testing. translation missing

Assessment by Portfolio and Standardized Testing. Assessment by Portfolio and Standardized TestingComparison and Contrast between Assessment by Portfolio and Standardized Testing Assessment is an important aspect of evaluating a student performance and ability throughout their learning period. There are several types of assessment among them assessment by portfolio and standardized testing. These two types of assessment have many differences as opposed to similarities with portfolio assessment considered to be appropriate in the current education system in parts of the globe due to its merits. On the other hand standardized testing is considered as traditional method due to its reliance on multiple choice assessments thus not giving students enough room for developing their skill set.  Ã‚   Standardized tests are used by psychologists as primary basis for assessing cognitive abilities and academic achievement. Weiner, et al, (2003) indicated that â€Å"standardized tests may be administered to a group of people or students by the examiner so as to match the students to academic curricula† (p. 275). On the other hand portfolio assessment provides a means for gathering student work over a long period of time which demonstrates the student’s proficiency in one or more academic areas. As a result Weiner, et al, (2003) established that â€Å"unlike standardized tests portfolio assessment usually emphasizes on complex works that integrate multiple dimensions of proficiency such as performance assessments, essays, and recordings of student performances† (p. 277). Standardized tests are also known as traditional assessment or norm-referenced and they have been used for a long period of time as a means of evaluating student performance. Mundell DeLario (1994) found out that â€Å"standardized tests measure growth in basic skills and their content is based on the best of curriculum practices for diverse population† (p. 1). This type of tests is known to have several inadequacies hence as a result efforts have been made to come up with a more precise assessment method. Mundell DeLario (1994) further says that portfolio assessment was developed out of the need to review performance and to logically collect sections of scholar’s work which is based on what the students are familiar with or are capable to do. Compared to portfolio assessment, standardized tests have a numerous choice format which makes tests a simple and economical way to evaluate knowledge.   Mundell DeLario (1994) indicated that â€Å"information obtained from these type of tests used for reporting to the parents on their children’s progress in learning basic skills, determining the developmental level of students for instructional purposes and providing information helpful in planning programs or groupings for instruction† (p. 1). Portfolio assessment revolves around the assortment of work that shows an individual’s knowledge in an area a criterion which was embraced by the progressives. For example a student may be good in art and consequently as an artist’s portfolio this can include various segments indicating what he or she can do. When a portfolio assessment is assumed, it is used to bring together and weigh up multiple sources of information that confirms a scholar’s capability in terms of procedure and invention (Mundell DeLario, 1994). Where else standardized tests use multiple choices, portfolio assessment reflects students work in one or additional subject areas and the models are chosen by mutually the scholar and the tutor. These are gathered analytically over time and are utilized to assess student development. One of the limitations of standardized tests is that they quantify comprehension learned instead of demonstrating what the student comprehends and can be comfortably apply and put more attention on recall. Mundell DeLario (1994) continues to say that â€Å"the how and why of what students read and write, the strategies they apply and how this learning relates to other tasks and to new ideas are not measured by standardized† (p. 1). In addition it important to note that using standardized test it is not possible to assess student’s abilities, analyze reason, reflect, and persuade from multiple choice answers (Mundell DeLario, 1994). This type of tests does not assist the teachers to plan more effective lessons. As a result, Mundell DeLario (1994) argued that â€Å"standardized tests limit the planning of lessons geared towards the achievement of students needs† (p. 2). Portfolio assessment is known to present authenticity as one of its characteristic. Using this type of assessment the teacher is able to evaluate reading throughout a range of daily reading activities in the classroom thus using this type of assessment, students are appraised on the basis of comprehending strategies they exhibit, their reactions in their reading journals and their conversation with the teacher or with other classmates (Mundell DeLario, 1994). Furthermore, Mundell DeLario (1994) argued that â€Å"portfolio assessment creates an accurate picture of achievement because it directly involves the teacher and students in establishing criteria for evaluation† (p. 3). This means that using portfolio assessment there is a undeviating relationship amid what is learned and what is evaluated, and learners know from the start of an assignment what they are expected to accomplish. Unlike in standardized test in portfolio assessment students have a number of examples in their portfolios to exhibit attainment of a particular objective more willingly than just one sample taken during one testing circumstance (Mundell DeLario, 1994). Ryan Cooper (2008) in addition indicated that â€Å"standardized tests overemphasize technical information and underemphasize educator’s professional judgments about the worthiness of a school programs† (p. 396). With the increasing calls from the progressives for more crises solving, decisive thinking and inscribing skills in the schools, standardized tests do not measure these outcomes. Studies show that qualities such as vital thinking and predicament solving abilities are difficult to measure while using multiple choices and other objective tests hence this calls for portfolio assessment (Ryan Cooper, 2008). Standardized tests can not gauge genuine student performance on some momentous tasks. Due to these limitations associated with standardized tests portfolio assessment was developed which puts into consideration recital tests that gets closer to how students relate knowledge rather than how they accumulate it in their brains. Both portfolio assessment and standardized tests present different dimensions of determining how students can fair in their schooling process. According to Ryan Cooper (2008) using portfolio assessment, it is possible to determine how well the students understand scientific concepts and can carry out scientific processes by requesting them to perform actual experiments. Ryan Cooper (2008) says that â€Å"through portfolio assessment teachers are capable of measuring what they want students to be able to do rather than relying on them to choose the correct response on a multiple choice test item in standardized tests† (p. 396). A major advantage of portfolio assessment is that it reveals student’s escalation in a certain period of time. A major contrast between portfolio assessment and standardized tests is that in portfolio assessment, students are appraised against themselves and not judge against other students (Mundell DeLario, 1994). This implies that in portfolio assessment, students become talented at evaluating their ability and set logical targets hence they can see their enhancement over a specific time epoch as skills are disclosed on tasks and goals are arrived at. Mundell DeLario (1994) continues to say that in â€Å"portfolio assessment, evaluation is part of instruction and also it considered to be ongoing and there not just the final product is important but also the process and growth over time† (p. 3). Also portfolio assessment is considered to be wide as it takes into account the students concerns, personal know-how, inspiration, and tactics. In conclusion, the progressive’s reaction to portfolio assessment was considered far much better than standardized test because of its strengths. While standardized tests do not focus on students development, this criteria does not give the students an opportunity to develop their skills in a particular area and it is does not assess their strengths and weaknesses. The advantages of portfolio assessment outweighs those of standardized tests because students work harder on tasks giving them more ownership in their work besides increasing their responsibility for learning and enhances their self concepts as learners. References Mundell, S. B DeLario, K (1994). Practical portfolios: reading, writing, math, and life skills, grades 3-6, Santa Barbara, CA: Libraries Unlimited.Ryan, K    Cooper, J. M (2008). Those Who Can, Teach, Stamford, CT: Cengage Learning.Weiner, I. B, Freedheim, D. K, Graham, J. R. Naglieri, J.A (2003). Handbook of Psychology: Assessment psychology, Hoboken, NJ: John Wiley and Sons.

The Triangle Shirtwaist Factory fire Essay Example | Topics and Well Written Essays - 750 words

The Triangle Shirtwaist Factory fire - Essay Example It seems like America has forgotten the lesson learned after the Triangle Shirtwaist Company fire. On March 25, 1911 right before the final whistle called for the end of the day a fire started on the 8th floor of the 23 Washington Place (Schneider). The Triangle Shirtwaist Factory occupied the 8th, 9th, and 10th floors of the building. After the fire started the 8th floor called the 10th floor to give them warning, but no one notified the 9th floor (Stein and Greider 182). The women on the 10th floor either escaped through an elevator or up the stairwell to the roof. The people on the 8th floor went down the stairwell or through the elevator. An elevator ran for a little while to the floors , but soon the cables melted (Drehle 153). Soon people were opening the elevator shaft and jumping to get away from the flames. Women were also jumping out the 9th floor windows as well. The 9th floor girls were trapped due to a locked stairwell that was supposed to prevent theft† (Greenwald 62). As the factory burned people gathered on the street watching the women jump. Fire trucks did not have the water or the ladders to reach the 8th floor. The devastation of human life was enormous. Lives were lost due to an antitheft measure. After the fire workers cried for new safety measures. â€Å"The 146 lives lost in the fire ignited. ... If women tried to strike they were considered bad. â€Å"They were either ‘good’ girls who listened docilely to fathers, employers, and policemen, or ‘bad’ women whose aggressive behavior made them akin to prostitutes† (Orleck 62). Even if the women at Triangle would have protested the unsafe locked doors, it would have been up to management to open them. One of the owners probably would not have listened. Max Blanck was caught locking doors again in 1913; he was only fined $20 (Hoeing). There was a need for the creation of OSHA and unions. Although the Triangle fire was 100 years ago, many lessons can still be learned from the tragedy. However Americans are forgetting about this tragedy and other workplace accidents. Unions are being outlawed by our own congresses. Instead of worrying about lives, the legislators are more interested in budget shortfalls. â€Å"Yet a century later, the laws that could have saved lives had they been in place on March 25, 1911, are being threatened by budget cuts proposed by a Republican-controlled Congressâ€Å" (Schneider). Unions have come to stand for pay raises and benefits. What about the safety issues? It seems like safety issues seem to be a moot discussion. The most famous anti-union legislation is against teachers in Wisconsin. It might seem like a good idea to cut the budget, but what could the possible outcomes be? Teachers might decided to go to different states that still have unions. That could mean the best teachers would leave. If the best teachers leave, then what would the children of Wisconsin be learning? The consequences could reach for generations. Without the union what happens if principals decided to make the teachers work in unsafe conditions?

White Paper Assignment Example | Topics and Well Written Essays - 250 words - 1

White Paper - Assignment Example Therefore, nurses are advised on how to avoid misuse of social media. Misuse would result into a compromised quality of their service delivery (Gagnon & Sabus, 2015). The white paper puts emphasis on the fact that patients’ personal treatment history should be safeguarded by nurses. The information can only be shared for medical purposes with the consent of the patient. Therefore, social media should not be used as a platform for sharing private medical information inappropriately. The health Act on Insurance Portability and Accountability gives the necessary guidance on patient privacy regulations (Hader & Brown, 2010). The white paper is a major boost to the efforts of the policy to improve health care service quality and safety. If the provisions of the paper are adhered to, the management and safe-keeping of patient records will improve. Breach of patient confidentiality will be avoided and good professional conduct will be a major code of operation. If nurses pay attention to their conduct, the services they provide will meet the standards that satisfies patients. Consequently, the quality of health care service will be improved (Henderson & Dahnke,