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ELECTRON SCATTERING RESISTIVITY OF METALS ppt


Posted by: seminar surveyer
Created at: Tuesday 04th of January 2011 04:09:15 AM
Last Edited Or Replied at :Tuesday 04th of January 2011 04:09:15 AM
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We find from the graph shown that as we goes on reducing the temp of a metal then it’s resistivi..................[:=> Show Contents <=:]



SEASONAL INFLUENCES ON SAFETY OF SUBSTATION GROUNDING SYSTEMS full report


Posted by: computer science technology
Created at: Thursday 21st of January 2010 01:13:25 AM
Last Edited Or Replied at :Saturday 25th of February 2012 12:39:46 AM
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nto the surrounding soil, thus lowering the soilâ„¢s resistivity and increasing the efficiency of the electrode.
TO IMPLEMENT A COMBINATION OF THE CCGR WITH BACKFILL.
Grounding system based on the implementation of the CCGRs with backfill appears to be the most economical solution in the given conditions of poor conducting soil and low values of the required ground resistance, even without taking into consideration the cost of real estate. Where the appropriate space is not available or too expensive, the CCGRs the only solution in establishing required ground system.
7. CONCLUSION..................[:=> Show Contents <=:]



Journal of Alloys and Compound JALCOM -


Posted by: seminar projects crazy
Created at: Saturday 13th of June 2009 03:43:16 PM
Last Edited Or Replied at :Saturday 13th of June 2009 03:43:16 PM
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tuent oxides like
ZnO and MgO, were found in the XRD pattern as the pattern
matches well with the JCPDS data of Zn
2
GeO
4
and Mg
2
GeO
4
.
Normally Magnesium germenate crystallizes in orthorhombic
structure and zinc germenate crystallizes in rhombohedral struc-
ture, thereby limiting simple incorporation of Zn in to Mg
2
GeO
4
lattice. Also the ionic radii of Zn and Mg differ; substituting Mg
with Zn will not be possible for all concentrations and at a par-
ticular concentration phase will start to segregate. The phase
segregation occurs due to inbuilt strain due to the di..................[:=> Show Contents <=:]



SEMINAR REPORT On Giant Magnetoresistance Effect


Posted by: Computer Science Clay
Created at: Saturday 13th of June 2009 02:36:40 PM
Last Edited Or Replied at :Saturday 13th of June 2009 02:36:40 PM
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in 1988
in Fe/Cr/Fe trilayers by a research team led by Peter Grünberg of the Jülich Research
Centre (DE), who owns the patent, and in Fe/Cr multilayers by the group of Albert Fert
of the University of Paris-Sud (FR), who first saw the large effect in multilayers (up to
50% change in resistance) that led to its naming, and first correctly explained the
underlying physics.
The discovery of GMR is considered as the birth of Spintronics.
Grünberg and Fert have received a number of prestigious prizes and awards for their
discovery and contributions to the field..................[:=> Show Contents <=:]



ANALYSIS OF RESIDUAL STRESSES IN MAIN CRANKSHAFT BEARINGS AFTER INDUCTION SURFACE


Posted by: computer science crazy
Created at: Friday 17th of April 2009 07:52:50 AM
Last Edited Or Replied at :Friday 21st of December 2012 11:11:44 PM
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d Possibilities for Automation

SURFACE INTEGRITY AND ITS LEVELS

Scientific discipline providing an integral assessment of the surface and surface layers
Measurement of Roughness and Analysis of Microstructure and Microhardness in the Thin Surface Layer
Studies of Residual Stresses in the Surface Layer and of the Mechanical Properties of the given material
Tests making clear the Behaviour of the given part under Operating Conditions

Important features on the curves are:

(a) the maximum value of the compressive residual stress in the hardened surface layer.

(b) the maximum valu..................[:=> Show Contents <=:]



HIGH TEMPERATURE SUPER CONDUCTIVITY


Posted by: seminar projects crazy
Created at: Friday 30th of January 2009 01:28:20 PM
Last Edited Or Replied at :Friday 30th of January 2009 01:28:20 PM
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o electric power devices such as motors and generators and to electricity transmission in power lines. For example, superconductors can carry as much as 100 times the electricity ordinary copper or aluminium wires of same size.Scientists had been intrigued with the concept of superconductivity since its discovery in the early 1900?s, but the extreme low temperature the phenomenon required was a barrier to practical and low cost application. This all changed in 1986 when a new class of ceramic super conductors were discovered that ?SUPERCONDUCTED? at higher temperatures. The science of high tem..................[:=> Show Contents <=:]



EXTRAORDINARY MAGNETO RESISTANCE


Posted by: seminar projects crazy
Created at: Friday 30th of January 2009 01:20:50 PM
Last Edited Or Replied at :Friday 30th of January 2009 01:20:50 PM
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n read-write speeds. But the technology to increase storage capacity has been somewhat solved out as new and advanced technologies are introduced to solve this problem. But the problem of read- write into these ultra high density storage disks at good speeds is a major problem. With the current technology which is available now, however large the storage capacity be, the amount of data which can be read or written into the disk has a limitation. This limit now a days is 13Gb/sq. inch. So the hard drive storage density has to be limited to that extent. The storage density cannot be increased ev..................[:=> Show Contents <=:]



Tamper Resistance


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 11:38:04 PM
Last Edited Or Replied at :Sunday 21st of September 2008 11:38:04 PM
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ystems pose unique security challenges because they are largely used in relationships where one party wants to put a secure, embedded device, in the hands of another, with the assurance that the second party cannot modify/hack the device. First, we outline the major attacks that threaten the security of an embedded system.

The vulnerability landscape of an embedded system is a vast expanse of attacks. A good understanding of the threats is necessary so that countermeasures can be devised to protect against threats that pose the greatest risk. Second, we present countermeasures and discuss ..................[:=> Show Contents <=:]



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