High-availability power systems: Redundancy options

In major applications like major computer installations, process control in chemical plants, safety monitors, IC units of hospitals etc., even a temporary power failure may lead to large economic losses. For such critical loads, it is of paramount importance to use UPS systems.

But all UPS equipments should be completely de-energized for preventive maintenance at least once per year. This limits the availability of the power system. Now there are new UPS systems in ....etc

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Hi
the following thread will help you to get more information about High availability power systems Redundancy options
http://seminarsprojects.net/Thread-high-availability-power-systems-redundancy-options-seminars-report ....etc

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VIRTUAL ROUTER REDUNDANCY PROTOCOL

INTRODUCTION

The Explosive growth of the internet has resulted in a strategic shift in every organization s communication needs. Internet connectivity is a minimal requirement for almost every organization. There are networks which an outage will cause collapse of a business or loss of considerable amount of money. Such networks are willing or have to invest into redundancy solutions. There are many ways of minimizing network outages and ev ....etc

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Scalable Routing in Cyclic Mobile Networks

Abstract:

The nonexistence of an end-to-end path poses a challenge in adapting traditional routing algorithms to delay-tolerant networks (DTNs). Previous works have covered centralized routing approaches based on deterministic mobility, ferry-based routing with deterministic or semi deterministic mobility, flooding-based approaches for networks with general mobility, and probability-based routing for semi deterministic mobility models. Unfortunately, none of these methods can guarantee bot ....etc

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see this doc file for abstract and the pdf for more details

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I want the pdf of design of combinational circuit by cyclic combinational method for low power vlsi ....etc

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ppt
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What is CRC?
A systematic error detecting code
a group of error control bits (which is the remainder --a polynomial division of a message polynomial by generator polynomial) is appended to the end of the message block
with considerable burst-error detection capability
The receiver generally has the ability to send
retransmission requests back to the data source through a feedback channel.

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ABSTRACT
Almost all firms use UPS systems. They maintain the continuity of supply in case of power outages. But all UPS equipments regardless of manufacturer should be completely de-energized for preventive maintenance at least once per year. This limits the availability of the power system.
But now-a days certain configurations of the UPS systems are there to permit concurrent maintenance so that we can overcome the above problem.

INTRODUCTION
In major applications like major computer installations, process control ....etc

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