We propose and analyze a scalable and efficient cluster-based group key management protocol for secure group communications in mobile ad hoc networks. For scalability and dynamic reconfigurability; we take a cluster-based approach by which group members are broken in to cluster-based subgroups and leaders in subgroups securely communicate with each other to agree on a group key in response to membership change and member mobility events. We show that secrecy requirement for group communication is satisfied. Further, there exists an optimal clus ....etc

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Spectral and nonlinear optical characteristics of nanocomposites
of ZnO“CdS
Litty Irimpan,
a
V. P. N. Nampoori, and P. Radhakrishnan
International School of Photonics, Cochin University of Science and Technology, Cochin,
Kerala 682022, India
Received 21 December 2007; accepted 6 March 2008; published online 8 May 2008
In this article, we present the spectral and nonlinear optical properties of ZnO“CdS nanocomposites
prepared by colloidal chemical synthesis. The optical band gap E
g
of the material is tunable
between 2.6 ....etc

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Electrical Characteristics of n-ZnO/p-Si Heterojunction Diodes
4
Grown by Pulsed Laser Deposition at Different Oxygen
5
Pressures
6
7
R.S. AJIMSHA,
1
M.K. JAYARAJ,
1,3
and L.M. KUKREJA
2
8
1.”Optoelectronics Devices Laboratory, Department of Physics, Cochin University of Science and
9
Technology, Kochi 682022, India. 2.”Laser Materials Processing Division, Raja Ramanna Centre
10
for Advanced Technology, Indore 452013, India. 3.”e-mail: [email protected]
11
Heterojunction diodes of n-type ZnO/p-type silicon (1 ....etc

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Presented by:
Jeong Sik Yim
Heong Kook Joo
Dong Seong Sohn


ABSTRACT

The holddown Spring is one of the major components of a fuel assembly for PWR. It holds the fuel assembly firmly seated down on the lower core plate and allows the FA axial movement caused from the irradiation growth of guide thimbles. Depending on the up-lift force of a fuel assembly, from 2 to 4 leaves are assembled to be a set of a spring pack and it is fixed on the frame of the top end piece by screw. The spring can deflect so greatly during operat ....etc

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ABSTRACT

This paper describes in detail, field experiments performed on a single-phase, distribution transformer to study the behavior of transformer terminal parameters during internal winding faults. A custom-built transformer provided with external taps was used for these tests. The taps were used to stage various internal winding faults in the transformer. Terminal values of voltages and currents were monitored and the results presented. A comparison of these results with simulation results is also presented


Presented By:
Palm ....etc

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my concern is that
so i would likt to get more information..
and i need to special ppt materia..

thank you for your information and help. ....etc

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Improvement In The Operating Characteristics Of
Internal Combustion Engine Using Variation In
Compression Ratio

Yadav Milind S.1, Wankhade P.A.2
1Finolex Academy of Management & Technology, Ratnagiri - 415639, Maharashtra, India
Email: [email protected]
2Veermata Jijabai Technological Institute, Mumbai - 400019, Maharashtra, India


Abstract - Vast developments are taking place in the field of
internal combustion engine especially to improve the fuel
economy and to reduce the emission percentage in the
exhaust ga ....etc

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Abstract Even though their capacities are still orders of mag- nitude lower than those of hard disks, flash storage sys- tems are rapidly gaining importance in energy-constrained systems. This paper focuses on USB flash drives, which can provide portable storage to mobile systems or stor- age to systems that otherwise do not have persistent stor- age opportunities (e.g., low-power sensor devices). The paper presents studies relating to power consumption, en- ergy overheads and benefits, and performance impacts of USB flash drives. The key insig ....etc

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Electrical Characteristics of n-ZnO/p-Si Heterojunction Diodes
4
Grown by Pulsed Laser Deposition at Different Oxygen
5
Pressures
6
7
R.S. AJIMSHA,
1
M.K. JAYARAJ,
1,3
and L.M. KUKREJA
2
8
1.”Optoelectronics Devices Laboratory, Department of Physics, Cochin University of Science and
9
Technology, Kochi 682022, India. 2.”Laser Materials Processing Division, Raja Ramanna Centre
10
for Advanced Technology, Indore 452013, India. 3.”e-mail: [email protected]
11
Heterojunction diodes of n-type ZnO/p-type silicon (1 ....etc

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An Experimental Study on the Vibration Characteristics of the Rotor Blade with Fiber Reinforced Plastics .

ABSTRACT:

With the current background of increasing oil price, a number of researches on development and supply ofrenewable energy are on process. Wind energy is one of them. Not only as energy itself, but also as travel resources, windenergy is ideal substitute for Korea equipped with appropriate conditions.
The purpose of this paper is that investigates the dynamic behavior characteristic of W.T.S (Wind Turbine System) an ....etc

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