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COMPUTER   SEMINAR TOPICS WITH ABSTRACT

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        3D PC Glasses

        Only a few years ago, seeing in 3-D meant peering through a pair of red-and-blue glasses, or trying not to go cross-eyed in front of a page of fuzzy dots. It was great at the time, but 3-D technology has moved on. Scientists know more about how our vision works than ever before, and our computers are more powerful than ever before -- most of us have sophisticated components in our computer that are dedicated to producing realistic graphics. Put those two things together, and you ll see how 3-D graphics have really begun to take off.


        Most computer users are familiar with 3-D games. Back in the 90s, computer enthusiasts were stunned by the game Castle Wolfenstein 3D, which took place in a maze-like castle. It may have been constructed from blocky tiles, but the castle existed in three dimensions -- you could move forward and backward, or hold down the appropriate key and see your viewpoint spin through 360 degrees. Back then, it was revolutionary and quite amazing. Nowadays, gamers enjoy ever more complicated graphics -- smooth, three-dimensional environments complete with realistic lighting and complex simulations of real-life physics grace our screens.

        But that s the problem -- the screen. The game itself may be in three dimensions, and the player may be able to look wherever he wants with complete freedom, but at the end of the day the picture is displayed on a computer monitor...and that s a flat surface.
        That s where PC 3-D glasses come in. They re designed to convince your brain that your monitor is showing a real, three-dimensional object. In order to understand quite how this works, we need to know what sort of work our brain does with the information our eyes give it. Once we know about that, we ll be able to understand just how 3-D glasses do their job.

        A T M

        These computers include the entire spectrum of PCs, through professional workstations upto super-computers.  As the performance of computers has increased, so too has the demand for communication between all systems for exchanging data, or between central servers and the associated host computer system. The replacement of copper with fiber and the advancement sin digital communication and encoding are at the heart of several developments that will change the communication infrastructure.  The former development has provided us with huge amount of transmission bandwidth.  While the latter has made the transmission of all information including voice and video through a packet switched network possible.
                   With continuously work sharing over large distances, including international communication, the systems must be interconnected via wide area networks with increasing demands for higher bit rates.
                    For the first time, a single communications technology meets LAN and WAN requirements and handles a wide variety of current and emerging applications.  ATM is the first technology to provide a common format for bursts of high speed data and the ebb and flow of the typical voice phone call.  Seamless ATM networks provide desktop-to-desktop multimedia networking over single technology, high bandwidth, low latency network, removing the boundary between LAN WAN.
                    ATM is simply a Data Link Layer protocol.  It is asynchronous in the sense that the recurrence of the cells containing information from an individual user is not necessarily periodic.  It is the technology of choice for evolving B-ISDN (Board Integrated Services Digital Network), for next generation LANs and WANs.  ATM supports transmission speeds of 155Mbits / sec.  In the future.  Photonic approaches have made the advent of ATM switches feasible, and an evolution towards an all packetized, unified, broadband telecommunications and data communication world based on ATM is taking place.

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