A WiMAX system consists of two parts:
Touch-screen monitors have become more and more commonplace as their price has steadily dropped over the past decade. There are three basic systems that are used to recognize a person's touch: 
Resistive
Capacitive
Surface acoustic wave
The resistive system consists of a normal glass panel that is covered with a conductive and a resistive metallic layer. These two layers are held apart by spacers, and a scratch-resistant layer is placed on top of the whole setup. An electrical current runs through the two layers while the monitor is operational. When a user touches the screen, the two layers make contact in that exact spot. The change in the electrical field is noted and the coordinates of the point of contact are calculated by the computer. Once the coordinates are known, a special driver translates the touch into something that the operating system can understand, much as a computer mouse driver translates a mouse's movements into a click or a drag.
In the capacitive system, a layer that stores electrical charge is placed on the glass panel of the monitor. When a user touches the monitor with his or her finger, some of the charge is transferred to the user, so the charge on the capacitive layer decreases. This decrease is measured in circuits located at each corner of the monitor. The computer calculates, from the relative differences in charge at each corner, exactly where the touch event took place and then relays that information to the touch-screen driver software. One advantage that the capacitive system has over the resistive system is that it transmits almost 90 percent of the light from the monitor, whereas the resistive system only transmits about 75 percent. This gives the capacitive system a much clearer picture than the resistive system.
On the monitor of a surface acoustic wave system, two transducers (one receiving and one sending) are placed along the x and y axes of the monitor's glass plate. Also placed on the glass are reflectors -- they reflect an electrical signal sent from one transducer to the other. The receiving transducer is able to tell if the wave has been disturbed by a touch event at any instant, and can locate it accordingly. The wave setup has no metallic layers on the screen, allowing for 100-percent light throughput and perfect image clarity. This makes the surface acoustic wave system best for displaying detailed graphics (both other systems have significant degradation in clarity).
Another area in which the systems differ is in which stimuli will register as a touch event. A resistive system registers a touch as long as the two layers make contact, which means that it doesn't matter if you touch it with your finger or a rubber ball. A capacitive system, on the other hand, must have a conductive input, usually your finger, in order to register a touch. The surface acoustic wave system works much like the resistive system, allowing a touch with almost any object -- except hard and small objects like a pen tip.
As far as price, the resistive system is the cheapest; its clarity is the lowest of the three, and its layers can be damaged by sharp objects. The surface acoustic wave setup is usually the most expensive.
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Very soon, the most common phrase transiting through mobile phone networks will no longer be "Where are you? but "I see you."
While satellite navigation via Global Positioning System (GPS) have been helping earthbound humans to visualize and plot everything from U.S. military movements to lost hikers since the 1970s, GPS and other mobile location-based services (LBS) have only recently begun to infiltrate our personal handsets.
"Many phone companies offer a cell-based location system," says Lawrence Cheung, principal consultant of the Hong Kong Productivity Council (HKPC).
"The system works by locating the strongest nearby cell signals that are visible by the device's antenna, which can determine its position with an accuracy of around 200 meters. Hong Kong has about 1,500 cell towers."
to read more plz visit: http://www.cnn.com/2008/TECH/06/19/digitalbiz.gps/index.html
A group of engineering graduates have set up a concept called 'Ecocab call centre' to overcome the routine transportation problem in Fazilka (Punjab).
It has made the popular mode of local transportation—cycle rickshaw—just a phone call away.
Initiated by the Graduates Welfare Association of former IITians, Ecocab Call Centres have been set up all over the town to help residents of Fazilka to enable accessing cycle rickshaws without difficulty.
Fazilka is the first town in the country where rickshaws can be summoned by a phone call.
To read more plz click
http://www.ibnlive.com/news/now-cycle-rickshaws-are-just-a-phone-call-away/69095-11.html
4G (also known as Beyond 3G), an abbreviation for Fourth-Generation, is a term used to describe the next complete evolution in wireless communications. A 4G system will be able to provide a comprehensive IP solution where voice, data and streamed multimedia can be given to users on an "Anytime, Anywhere" basis, and at higher data rates than previous generations.
As the second generation was a total replacement of the first generation networks and handsets; and the third generation was a total replacement of second generation networks and handsets; so too the fourth generation cannot be an incremental evolution of current 3G technologies, but rather the total replacement of the current 3G networks and handsets. The international telecommunications regulatory and standardization bodies are working for commercial deployment of 4G networks roughly in the 2012-2015 time scale. At that point it is predicted that even with current evolutions of third generation 3G networks, these will tend to be congested.
There is no formal definition for what 4G is; however, there are certain objectives that are projected for 4G. These objectives include: that 4G will be a fully IP-based integrated system. 4G will be capable of providing between 100 Mbit/s and 1 Gbit/s speeds both indoors and outdoors, with premiumquality and high security. [1]
To read more plz click on the link: - http://en.wikipedia.org/wiki/4G
Enthusiastic new iPhone owners are starting to sound like the cast of long-running stage musical: "I Love you, You're Perfect, Now Change." Only days after snapping up the latest iPhone, they still glow over their purchase -- but already are brainstorming ideas Steve Jobs could use for Apple Inc's next iPhone
In comparison to last year's model, the latest iPhone's snappier Web speeds, better sound quality, location-aware navigation, and third-party application store left new owners with no doubts that waiting in line for hours was worth it.
But even the happiest among them offered tips for improvements for the iPhone -- at heart a powerful computer and communications device -- as well as reasons why it won't completely replace other gear such as BlackBerrys or laptops.
to read more click here :
http://www.ibnlive.com/news/fans-drool-over-iphone-but-ask-for-more/69072-11.html
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