A multi-scale model for electrochemistry in proton exchange membrane (PEM) fuel cells has been developed. The multi-scale model involves four scales: atomic-scale for kinetics of chemical/electrochemical reaction, nano-scale for surface reactions, micro-scale for electrolyte transport, and macro-scale. The energetics of chemical and electrochemical reactions are computed using quantum computation which serves as input for the kinetics on nano-scale catalysts which is simulated using the dynamic Monte Carlo (DMC) method. A full fuel cell model w ....etc

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I NEED A PPT ON FAILURES ON FACTS RELATED TO MIL STD 1553 B BUS ....etc

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Internal winding faults resulting from the degradation of transformer winding insulation can be catastrophic and hence expensive. In the new environment of deregulation, utilities therefore are needing inexpensive methods employed to detect such faults in the incipient stage.

The development of an accurate internal fault diagnostic technique for transformers must be based on analysis of quantities from faults scenarios.

Considering the safety of personal, the damage that will occur in the transformer, the consumed time, and related c ....etc

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what is the previous paper used before designing mac using reversible logic ....etc

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i need a project report on MIL STD 1553b.Please help me:( ....etc

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Internal winding faults resulting from the degradation of transformer winding insulation can be catastrophic and hence expensive. In the new environment of deregulation, utilities therefore are needing inexpensive methods employed to detect such faults in the incipient stage. The development of an accurate internal fault diagnostic technique for transformers must be based on analysis of quantities from faults scenarios. Considering the safety of personal, the damage that will occur in the transformer, the consumed time, and related cost, simula ....etc

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VRML is a language for creating 3D models using a set of primitive geometrical shapes. Some browsers such as Netscape have plug-ins ( Live 3Dand Cosmo Player) at enable you to view these 3D structures. The most well known open browsers are Openvrm, Freewrl,Vrmlview The most powerful aspect of VRML is that it provides sy access to manipulation and visualization of 3D objects for 'ordinary people'. In the past, 3D graphics of this quality was only accessible to those with powerful (and very expensive) workstations. An even more important aspect o ....etc

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Introduction

In the satellite launch vehicle, the Avionics system is proposed to be based on MIL-STD 1553B BUS. A number of interface modules for application such as sensor data acquisition, vehicle sequencing, control generation, command posting etc. are being designed with this interface. These interface modules are then connected to the onboard computers via the 1553B BUS. These modules have to be tested separately and evaluated and also confirm their compliance with the 1553B BUS standard before being integrated as the Avionics System. T ....etc

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MILSTD 1553B

The digital data bus MILSTD 1553B was designed in early 1970's to replace analog point to point wire bundles between electronic instrumentations. The MILSTD 1553B has four main elements.

1. Bus controller to manage information flow.
2. Remote terminals to interface one or more subsistence.
3. Bus monitor for data bus monitoring.
4. Data bus components. Including bus couplers, cabling, terminators and connectors.

This is a differential serial bus used in military and space equipments comprised of multiple redundant bu ....etc

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bcd adder using reversible logic vhdl code ....etc

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