INVITED PAPER Electrical Machines and Drives for Electric‚ Hybrid‚ and Fuel Cell Vehicles Induction and switched-reluctance machines can provide the needed characteristics‚ but permanent magnet brushless machines offer a higher efficiency and torque density. By Z. Q. Zhu‚ Senior Member IEEE‚ and David Howe ABSTRACT | This paper reviews the relative merits of induction‚ switched reluctance‚ and permanent-magnet (PM) brushless machines and drives for application in electric‚ hybrid‚ and fuel
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Commercial Electrical Repair and Installation in Winchester‚ VA Having electrical repairs performed on your commercial property is critical. You need the electrical system to run smoothly in order to do business. An electrical component or system that does not work properly could cost you much in terms of retaining clients. If you own commercial property‚ you need to be sure that the electrical system performs correctly for the sake of your tenants. You could be held liable if you fail to do this
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General Description and Typical Problems Environmental engineering is the application of science and engineering principles to improve the natural environment (air‚ water‚ and/or land resources)‚ to provide healthy water‚ air‚ and land for human habitation and for other organisms‚ and to remediate polluted sites. These engineers strive to improve the quality of waste water management and air pollution control‚ recycling‚ waste disposal‚ radiation protection‚ industrial hygiene‚ environmental sustainability
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e idea of the first cellular network was brainstormed in 1947. It was intended to be used for military purposes as a way of supplying troops with more advanced forms of communications. From 1947 till about 1979 several different forms of broadcasting technology emerged. The United States began to develop the AMPS (Advanced Mobile Phone Service) network‚ while European countries were developing their own forms of communication. 1.2 History of GSM Technology Europeans quickly realized the disadvantages
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This thesis is a collection of three independent essays on the causes and consequences of local elections in non-democratic regimes. The first essay examines the political consequences of local elections on the first democratic election after the fall of an autocratic regime. My theoretical analysis highlights that officials that were appointed by upper levels of government have a stronger incentive to continue to use local patronage networks to signal their alignment to upper levels of government
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The water fountain as we know it was first invented in the early 1906 and is credited to two men - Halsey Willard Taylor and Luther Haws. Haws patented the first drinking faucet in 1911. with the primary motivation being to provide safer drinking water and avoid the risk of typhoid fever caused by contaminated water. (Luther Haws’ father had died of typhoid fever precipitated by contaminated water.) From those humble beginnings‚ when water coolers used large blocks of ice to chill the water
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Advantages Advantages & Disadvantages of Electric CarsAdvantages ~ a safe way to convert fossil fuels into automotive power ~ more efficient than gas-powered vehicles because their fuel can be harnessed from any source of electricity‚ which is available in most homes and businesses ~ the electricity created by electric cars is created by the burning of fossil fuels at power plants‚ instead of in an internal-combustion engine which pollutes the air. ~ the only new system required
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find themselves as an outsider find that they are non-conformists‚ one who does not conform to‚ or refuses to be bound by‚ accepted beliefs‚ customs‚ or practices. Those who do conform to this way of life are the outcasts; they feel alienated and displaced as they reject the dominant paradigm. To be a conformist a person who uncritically or habitually conforms to the customs‚ rules‚ or styles of a group is to be part of an accepted code. To be a non-conformist in a changing society is to be given
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ELECTRICAL SUBMERSIBLE PUMP SURVIVAL ANALYSIS MICHELLE PFLUEGER Petroleum Engineer‚ Chevron Corp. & Masters Degree Candidate Advisor Dr. Jianhua Huang With help from PHD Candidate Sophia Chen Department of Statistics‚ Texas A&M‚ College Station MARCH 2011 ABSTRACT A common metric in Petroleum Engineering is “Mean Time Between Failures” or “Average Run Life”. It is used to characterize wells and artificial lift types‚ as a metric to compare production conditions‚ as well as a measure
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An allure for Science and Technology and a keen interest in the growing world of technology led me to take up engineering. I chose to major in Electrical and Electronics Engineering with an intense longing to explore into the challenging field. During my under graduate program I learned the different fundamentals of electrical and electronics which were well-balanced with practical exposure. Right from my school days I had an active interest for science and research. As a matter of fact‚ I used to
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