|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
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.
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
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.