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Computer/IT Topics Category

Blu-Ray Technology

Added on: February 13th, 2012 by Afsal Meerankutty No Comments

Blu-ray is a new optical disc standard based on the use of a blue laser rather than the red laser of today’s DVD players. The standard, developed collaboratively by Hitachi, LG, Matsushita (Panasonic), Pioneer, Philips, Samsung, Sharp, Sony, and Thomson, threatens to make current DVD players obsolete. It is not clear whether new Blu-ray players might include both kinds of lasers in order to be able to read current CD and DVD formats.
The new standard, developed jointly in order to avoid competing standards, is also being touted as the replacement for writable DVDs The blue laser has a 405 nanometer (nm) wavelength that can focus more tightly than the red lasers used for writable DVD and as a consequence, write much more data in the same 12 centimeter space Like the rewritable DVD formats, Blu-ray uses phase change technology to enable repeated writing to the disc.

Blu-ray’s storage capacity is enough to store a continuous backup copy of most people’s hard drives on a single disc. The first products will have a 27 gigabyte (GB) single-sided capacity, 50 GB on dual-layer discs. Data streams at 36 megabytes per second (Mbps), fast enough for high quality video recording Single-sided Blu-ray discs can store up to 13 hours of standard video data, compared to single-sided DVD’s 133 minutes. People are referring to Blu-ray as the next generation DVD, although according to Chris Buma, a spokesman from Philips (quoted in New Scientist) “Except for the size of the disc, everything is different.”

Blu-ray discs will not play on current CD and DVD players, because they lack the blue-violet laser required to read them. If the appropriate lasers are included, Blu-ray players will be able to play the other two formats. However, because it would be considerably more expensive, most manufacturers may not make their players backward compatible. Panasonic, Philips, and Sony have demonstrated prototypes of the new systems.

Sky X Technology

Added on: February 13th, 2012 by Afsal Meerankutty No Comments

Satellites are attractive option for carrying internet and other IP traffic to many locations across the globe where terrestrial options are limited or [censored] prohibitive. But data networking on satellite is faced with overcoming the large latency and high bit error rate typical of satellite communications as well as the asymmetric bandwidth design of most satellite network.Satellites is ideal for providing internet and private network access over long distance and to remote locations. However the internet protocols are not optimized for satellite conditions. So the throughput over the satellite networks is restricted to only a fraction of available bandwidth.Mentat , the leading supplies of TCP/IP to the computer industry have overcome their limitations with the development of the Sky X product family.

The Sky X system replaces TCP over satellite link with a protocol optimized for the long latency, high loss and asymmetric bandwidth conditions of the typical satellite communication. The Sky X family consists of Sky X Gateway, Sky X Client/Server and Sky X OEM products. Sky X products increase the performance of IP over satellite by transparency replacing. The Sky X Gateway works by intercepting the TCP connection from client and converting the data to Sky X protocol for transmission over the satellite. The Sky X Client /Server product operates in a similar manner except that the Sky X client software is installed on each end users PC. Connection from applications running on the PC is intercepted and sends over the satellite using the Sky X protocol.

Brain Computer Interface

Added on: February 12th, 2012 by Afsal Meerankutty 2 Comments

Brain Computer interface (BCI) is a communication system that recognized users’ command only from his or her brainwaves and reacts according to them. For this purpose PC and subject is trained. Simple task can consist of desired motion of an arrow displayed on the screen only through subject’s imaginary of something (e.g. motion of his or her left or right hand). As the consequence of imaging process, certain characteristics of the brainwaves are raised and can be used for user’s command recognition, e.g. motor mu waves (brain waves of alpha range frequency associated with physical movements or intention to move).

An Electroencephalogram based Brain-Computer-Interface (BCI) provides a new communication channel between the human brain and a computer. Patients who suffer from severe motor impairments (late stage of Amyotrophic Lateral Sclerosis (ALS), severe cerebral palsy, head trauma and spinal injuries) may use such a BCI system as an alternative form of communication by mental activity.

The use of EEG signals as a vector of communication between men and machines represents one of the current challenges in signal theory research. The principal element of such a communication system, more known as “Brain Computer Interface”, is the interpretation of the EEG signals related to the characteristic parameters of brain electrical activity.

Artificial Intelligence

Added on: February 9th, 2012 by Afsal Meerankutty 5 Comments

The AP is an artificial intelligence–based companion that will be resident in software and chips embedded in the automobile dashboard. The heart of the system is a conversation planner that holds a profile of you, including details of your interests and profession.

A microphone picks up your answer and breaks it down into separate words with
speech-recognition software. A camera built into the dashboard also tracks your lip movements to improve the accuracy of the speech recognition. A voice analyzer then looks for signs of tiredness by checking to see if the answer matches your profile. Slow responses and a lack of intonation are signs of fatigue.

This research suggests that we can make predictions about various aspects of driver performance based on what we glean from the movements of a driver’s eyes and that a system can eventually be developed to capture this data and use it to alert people when their driving has become significantly impaired by fatigue.


Added on: February 6th, 2012 by Afsal Meerankutty No Comments

Organizations have, over the years, successfully employed business intelligence tools like OLAP and data warehousing to improve the supply of business information to end users for cross industry applications like finance and customer relationship management, and in vertical markets such as retail, manufacturing, healthcare, banking, financial services, telecommunications, and utilities. In the recent years, the Internet has opened up an entirely new channel for marketing and selling products. Companies are taking to e-business in a big way. The issue facing end users as organizations deploy e-business systems is that they do have not had the same business intelligence capabilities available to them in e-business systems as they do in the traditional corporate operating environment. This prevents businesses from exploiting the full power of the Internet as a sales and marketing channel.

As a solution, vendors are now developing business intelligence applications to capture and analyze the information flowing through e-business systems, and are developing Web-based information portals that provide an integrated and personalized view of enterprise-wide business information, applications, and services. This advanced business intelligence systems are called E-intelligence systems.

Airborne Internet

Added on: February 6th, 2012 by Afsal Meerankutty 2 Comments

The Airborne Internet is network in which all nodes would be located in aircraft. The network is intended for use in aviation communications, navigation, and surveillance (CNS) and would also be useful to businesses, private Internet users, and military. In time of war, for example, an airborne network might enable military planes to operate without the need for a communications infrastructure on the ground. Such a network could also allow civilian planes to continually monitor each other’s positions and flight paths.

Airborne Internet is network will serve tens of thousands of subscribers within a super-metropolitan area, by offering ubiquitous access throughout the networkâ„¢s signal “footprint”. The aircrafts will carry the “hub” of a wireless network having a star topology. The aircrafts will fly in shifts to provide continuous service, 24 hour per day by 7 days per week, with an overall system reliability of 99.9% or greater. At least three different methods have been proposed for putting communication nodes aloft. The first method would employ manned aircraft, the second method would use unmanned aircraft, and the third method would use blimps. The nodes would provide air-to-air, surface-to-air, and surface-to-surface communications. The aircraft or blimps would fly at altitudes of around 16 km, and would cover regions of about 40 mi (64 mi) in radius. Any subscriber within this region will be able to access the networkâ„¢s ubiquitous multi-gigabit per second “bit cloud” upon demand. what the airborne internet will do is provide an infrastructure that can reach areas that don’t have broadband cables & wires. Data transfer rates would be on the order of several gigagabits per second, comparable to those of high-speed cable modem connections. Network users could communicate directly with other users, and indirectly with conventional Internet users through surface-based nodes.

Like the Internet, the Airborne Network would use TCP/IP as the set of protocols for specifying network addresses and ensuring message packets arrive. This technology is also called High Altitude Long Operation (HALO) The concept of the Airborne Internet was first proposed at NASA Langley Research Center’s Small Aircraft Transportation System (SATS) Planning Conference in 1999.