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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Recently the introduction of the third generation mobile networks has just been taking place which holds out the possibilities what have never been seen before. Every mobile generation created something new and more valuable for the users in comparison with previous networks and this will be the case also with the appearance of the fourth generation.

As time and the technology progresses, people get used to having access to information at any time, independently of the presence of any cables. Moreover, people want to have continuous high qu ....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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Abstract
As Internet access becomes a basic necessity, alternative ways to go on-line without a computer will be required by mobile professionals, the visually impaired, and people without access to computers. Voice/speech based interface options will become an important part of the overall solution to access the Internet content. As the need for an alternative access method to the Internet has become evident, progress continues to be made by technologists to provide such solutions.
One key area of focus has been voice-base ....etc

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Abstract
Silicon microprocessors have been the heart of computing world for more than forty years. Computer chip manufacturers are furiously racing to make the next microprocessor that will topple speed records. Sooner or later the physical speed and miniaturization limit of silicon microprocessors is bound to hit a wall.
Chipmakers need a new material to produce faster computing speed with fewer complexities. Itâ„¢s unbelievable where scientists have found this new material. DNA, the material our genes are made ....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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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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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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