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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
seminar on resistivity of metals , electron scattering and metal resistivity ppt, electron scattering resistivity of metals pdf , electron scattering in metals, resistivity of metals , electron electron scattering in metals, electron scattering ppt , electron scattering metal resistance powerpoint,
velocity Vf .For usual values of temp. T , it may be shown that the scattering in these monovalent metals is isotropic . Then, ť=tc & λ = Vx * ťc .The values of man free path at 0 0c are several hundred angstroms.

We find from the graph shown that as we goes on reducing the temp of a metal then it’s resistivity also decreases & vice versa but assume a constant value of temp. below 6 K.
In general, the resistivity of a perfect, pure single crystal of a metal approaches to zero as temp. T approaches zero. This signifies that at very low temp. the mean fr..................[:=> 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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kept unchanged.
When the thickness of the high resistivity soil layer exceeds the burial depth of the grounding grid (the right side of the vertical dot line in figure), if a current is injected into the grounding system, the current has to flow through the freezing soil layer with high resistivity to the bottom normal soil layer with resistivity of 200 m, so the grounding resistance increases with the thickness of the freezing soil layer. We observed that the grounding resistance increases with the resistivity of the high resistivity soil layer. When the thickness of the freezing soil laye..................[:=> 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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Lumin. 99
(2002) 311“324.
G. Anoop, K. Minikrishna, M.K. Jayaraj, J. Electrochem. Soc. 155 (2008)
J7“J10.
M.K. Jayaraj, C.P.G. Vallabhan, J. Electrochem. Soc. 138 (1991)
1512“1516.
M.K. Jayaraj, A. Antony, P. Deneshan, Thin Solid Films 389 (2001)
284“287.
M. Iwasaki, D.N. Kim, K. Tanaka, T. Murata, K. Morinaga, Sci. Technol.
Adv. Mater. 4 (2003) 137“142.
H.M. Yang, J.X. Shi, H.B. Liang, M.L. Gong, Mater. Sci. Eng. B 127 (2006)
276“279.
S.G. Demos, B.Y. Han, V. Petricevíc, R.R. Alfano, J. Opt. Soc. Am. B 13
(..................[:=> 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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lly possible. These experiments were performed at low temperatures and in the
presence of very high magnetic fields and used laboriously grown materials that cannot
be mass-produced, but the magnitude of this discovery sent scientists around the world
on a mission to see how they might be able to harness the power of the Giant Magneto
resistance effect.
IBM ENTERS THE SCENE
Stuart Parkin and two groups of colleagues at IBM's Almaden
Research Center, San Jose, Calif, quickly recognized its potential, both as an important
new scientific discovery in magnetic materials and one that ..................[:=> 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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SSES IN MAIN CRANKSHAFT BEARINGS AFTER INDUCTION SURFACE HARDENING AND FINISH GRINDING


INDUCTION SURFACE HARDENING

ADVANTAGES

¢ Short Heat Treatment Times

¢ Good Repeatability

¢ Hardened Layer Quality

¢ Small or Negligible Subsequent Distortion

¢ Minimum Subsequent Product Surface Oxidation

¢ Good 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..................[:=> 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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nd extremely low losses. This ability to carry large amounts of currents can be applied to 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 conduct..................[:=> 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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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 even though the technology to do so is available because of the read head limitation. Here comes the importance of extraordinary magnetoresistance. This property makes it possible to create hard disks of high density storage, because by using this property it is possible create read- write heads which can access the data from the high density storage disks which in normal case would not have been possible. Using this property, magnetic sensor read..................[:=> 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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storage techniques can enhance tamper-resistant techniques. Digital watermarking is not appropriate for tamper-resistance implemented in the storage system rather than at the application level...................[:=> Show Contents <=:]



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