ECNG2000 – Electromechanical Energy Conversion Tutorial 4 – DC Machine 1. Describe operation of DC machine (motor and generator) using illustrations. Specifically explain the purpose of: a. brushes d. armature winding b. split ring commutators e. effect of back emf (in operation) c. field winding 2. Draw the different configurations of DC machines a. shunt c. separately excited b. series 3. Develop‚ using Kirchhoff’s laws‚ equation for Ea (armature voltage) in both motoring and generating mode
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Case: Tiffany & Co. (1) What (if any) are the problems confronting the company? Because of Tiffany’s large exposure in Japan‚ it is severely adversely affected by the yen/dollar exchange rate fluctuation and needs to determine the best way to hedge against this risk. (2) How did the problems arise? Tiffany was assuming control of its operations in Japan‚ which had previously been managed entirely by Mitsukoshi. With this greater control over its sales in Japan came much increased exposure
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“Darwin among the Machines‚” 46 years before Forster (whose story‚ “The Machine Stops‚” was published 107 years ago). It is hard to believe that two stories with a similar tone could have been written so long ago. What is even more incredible is that they both seem to relate to present day society. How could two people (both from a time when technology was in its infancy) could write stories that could have been written about our time or even in our near future? The concept that machines will surpass
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AVAILABLE CASE TOOLS I. SYSTEM FLOWCHART AND ER-DIAGRAM GENERATION TOOL Name of the tool: SMARTDRAW URL: This Software can be downloaded from: http://www.smartdraw.com. This is a paid software‚ but a 30-day free trial for learning can be downloaded. Requirements to use the tool: PC running Windows 95‚ 98 or NT. The latest versions of Internet Explorer or Netscape Navigator‚ and about 20MB of free space. What the tool does: Smartdraw is a perfect suite for drawing all kinds of diagrams and
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Peiling Cai February‚ 7th‚ 2013 PHOTOSHOP TOOLS |Tool |Icon |Description | |Zoom |[pic] |The Zoom Tool magnifies / reduces the image view without changing the image data. | |Hand |[pic] |The Hand Tool allows you to navigate an edited image‚ when it is not completely visible in | | | |its
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Co –education is considered to be best system of education- The most important parameter of countries progress is education .so‚ it is not whether the school is all of girls or the school is all of all boys the school‚ so it should be the guiding forces where the schools are built to impart knowledge to the children. Gone are the days when the girls were not allowed to go out by themselves and talking to boys was considered to be orthodox. Today can you imagine a workplace without a women
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This report describes four OLAP tools. The four tools that I have chosen for this are: Pentaho – Open Source Tool Cognos Business Objects SpagoBI Pentaho – Open Source Application “The Pentaho BI Project is an open source application software for enterprise reporting‚ analysis‚ dashboard‚ data mining‚ workflow and ETL capabilities for business intelligence needs” (http://en.wikipedia.org/wiki/Pentaho). The Pentaho Business Intelligence Suite provides reporting
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StoneTools A stone tool is‚ in the most general sense‚ any tool made either partially or entirely out of stone. Although stone tool-dependent societies and cultures still exist today‚ most stone tools are associated with prehistoric‚ particularly Stone Age cultures that have become extinct. Archaeologists often study such prehistoric societies‚ and refer to the study of stone tools as lithic analysis. Stone has been used to make a wide variety of different tools throughout history‚ including arrow
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factor to people’s dreams—it is no exception in the novel‚ One Flew Over the Cuckoo’s Nest by Ken Kesey. Narrator Chief Bromden refers to society as the Combine. The definition of a combine is “an agricultural machine that cuts‚ threshes‚ and cleans a grain crop in one operation‚” or a machine that cuts and levels out that which it consumes. Society is like a combine in that it restrains‚ manipulates‚ and obliterates anyone who tries to stand up against it. Through his recount of the story of McMurphy
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Forensic Tools: Redline Vs. Volatility One of the hardest choices to make when dealing with a problem is‚ what tool will resolve this issue? There are hundreds of tools that deal with the different aspects and approaches to memory forensics and incident response. Failing to choose a tool‚ leaves a hole in mission related capabilities. The two that are discussed within this paper are Redline and Volatility. These tools address the issue of memory forensics and incident response; however‚ they take
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