INTRODUCTION
Efficient control of D.C motor speed is very economical to any industries for that reason we are using full wave rectifier in which we are using triacs as switches because of bi-directional nature of triacs we are preferred instead of using thyrister as a switches. To obtain a four quadrant operation we need 8 switches if we use thyristers (this circuit called dual converter) and if we use triacs we need 4 switches only.
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ZFS Filesystem
Abstract
ZFS: the last word in file systems Most system administrators take the limitations of current file systems in stride. After all, file systems are what they are: vulnerable to silent data corruption, brutal to manage, and excruciatingly slow. ZFS, the dynamic new file system in Sun\'s Solaris 10 Operating System (Solaris OS), will make you forget everything you thought you knew about file systems. It offers: €¢ Simple administration ZFS automates and consolidates complicated storage adm ....etc

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Abstract :

Current trends in computing technologies are drifting towards distributed and parallel computing. These topologies emphasize on concurrent access schemes. Because of distributed computing, the use of shared resources like databases, memory, etc. is growing. Locking mechanisms can be used effectively to achieve high concurrency levels without corrupting the resources. There are a wide range of synchronization protocols, some providing strong consistency while others granting weak consistency. There is a trade-off between complexi ....etc

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Todays file systems, which the system administrators observe to be always in the verge of data corruption and more over find it extremely difficult to manage due to its slow rate of execution has enabled ZFS to emerge as one of the most powerful file system. Used in Suns Solaris 10 Operating System (Solaris OS), ZFS finds its edge over the other file systems by its unique features of

* Cutting short the administrative difficulties by 80 percent by automating and combining complicated storage administration concepts.
* It ensures the ....etc

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COOPERATIVE LINUX

Abstract
Software development for an embedded Linux system in most cases requires a free license of GCC (GNU C/C++ compiler) and accessories. Many developers find it disconcerting that the GNU tools are primarily available for Linux-based PCs. Any attempt to make GCC run under Windows in order to program an embedded Linux system has been fraught with problems until now. The popular Cygwin “ as a Unix/Linux emulation environment under Windows “ is muc ....etc

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Digital Smell

Abstract :

The technology has so far targeted mainly our sense of sight and sound. To further enhance the virtual reality experience and another flavor to it, technology is now targeting your nose and tongue.
The application area of virtual reality is vast- from normal entertainment to the Internet and e-commerce application. You will be able to smell product before buying them online.
California-based Digiscents Inc. has developed the iSmell personal scent synthesizer. This small device connects through your pc via serial por ....etc

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SYNOPSIS

NAME: ZFS FILE SYSTEM



AREA: FILE SYSTEM



ORIGIN:

FS was designed and implemented by a team at Sun led by Jeff Bonwick. It was announced on September 14, 2004. Source code for ZFS was integrated into the main trunk of Solaris development on October 31, 2005 and released as part of build 27 of OpenSolaris on November 16, 2005. Sun announced that ZFS was included in the 6/06 update to Solaris 10 in June 2006, one year after the opening of the OpenSolaris community.

The name originally stood for Zet ....etc

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The Ping of Death uses a ping system utility to create an IP packet that exceeds the maximum 65,536 bytes of data allowed by the IP specification. The oversize packet is then sent to an unsuspecting system. Systems may crash, hang, or reboot when they receive such a maliciously crafted packet. This attack is not new, and all OS vendors have fixes in place to handle the oversize packets.

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ZFS
Todays file systems, which the system administrators observe to be always in the verge of data corruption and more over find it extremely difficult to manage due to its slow rate of execution has enabled ZFS to emerge as one of the most powerful file system. Used in Suns Solaris 10 Operating System (Solaris OS), ZFS finds its edge over the other file systems by its unique features of

* Cutting short the administrative difficulties by 80 percent by automating and combining complicated stora ....etc

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