iGATE Corporation today announced its new brand name as ‘iGATE.’ The name ‘Patni,’ representing Patni Computer Systems Limited, a majority owned subsidiary, has been removed from its brand identity.Unveiling the brand, Phaneesh Murthy, CEO, iGATE said, “I have always articulated that Patni, being a family name, is difficult to protect in several of our markets. This brand change is in line with our vision of ‘one company’ that will follow the successful delisting offer process of Patni with the Indian stock exchanges.”“With a revenue run rate of over a billion dollars and over 27,000 employees, the new iGATE symbolizes a young and vibrant brand representing the merits of a fully integrated entity. Equipped with an innovative mindset of a game-changer, iGATE will engage with global customers to deliver high-impact outcomes through our proprietary iTOPS framework,” Murthy said.

Gyroscope vs Accelerometer

The difference between gyroscope and accelerometer is that the former can sense rotation, the latter cannot. A 3 axis accelerometer has the ability to gauge the orientation of a stationary platform relative to the earth’s surface. If the platform happens to be in free fall, the acceleration will be shown to be zero. If it is only accelerating in a particular direction the acceleration will be indistinguishable from the acceleration being provided by the earth’s gravitational pull. So an accelerometer alone cannot be used to have an aircraft maintain a particular orientation.

A gyroscope on the other hand has the capability of measuring the rate of rotation around a particular axis. For instance if a gyroscope is used to gauge the rate of rotation around the roll axis of an aircraft, it will come up with a non zero roll value, so long as the aircraft continues to roll, but shows zero if the roll stops.

Another way of identifying the difference between a gyroscope and an accelerometer is by understanding that a gyroscope helps measure or maintains orientation, using the principles of angular momentum, whereas an accelerometer measures vibration. Another difference pertains to the fact that a gyroscope gives an indication of the angular rate, whereas an accelerometer measures linear acceleration.

The 2 axis accelerometer gives you the direction of gravity on your balancing instrument. Typically a gyroscope is used to measure angular position premised on the principle of rigidity of space of the gyroscope. A gyroscope has many practical applications. It can be used for navigation, on Unmanned Aerial Vehicles, and radio controlled helicopters. An accelerometer on the other hand sees extensive application. It is used in engineering, machinery monitoring, building and structural monitoring, medicine, navigation, transport and consumer electronics.
The use of accelerometers in consumer electronics is a relatively new phenomenon. These are used is smart phones and devices such as play station. They are also incorporated in new generation laptops and notebooks.

We can see that both gyroscope and accelerometer have their individual characteristics and functions. Either of these can be critically important when appropriately used.
Summary:

1. Accelerometermeasures linear motion and gravity.
2. Accelerometer detects and measures electrical current that derives from muscular action.
3. The magnitude of the signal in the case of accelerometer is biased by gravity. This is not the case with gyroscope.
4. Information pertains to bandwidth and frequency available to the extent of zero frequency in the case of gyroscope. That may not be the case with an accelerometer.
5. A onetime integration is sufficient to achieve angular displacement in the case of gyroscope, whereas a difficult two time integration is required in the case of accelerometer.
6. There is high signal to noise ratio in the case of gyroscope, while in accelerators, there is mostly a low signal to noise ratio.

Read more: Difference Between Gyroscope and Accelerometer | Difference Between | Gyroscope vs Accelerometer http://www.differencebetween.net/technology/difference-between-gyroscope-and-accelerometer/#ixzz1uBSzjsHp

Samsung Galaxy S3 & wireless charging: How it works

While announcing Galaxy S3 at an event in London, Samsung said the device would support wireless charging when used with a special charger that would be sold separately.

This brings up a question: How does wireless charging work? Among the engineers and scientists, wireless charging is known as 'inductive charging'. It utilizes two smart coils - one in the charger and another in the device that is getting charged. The primary coil creates a very small electromagnetic field around the charger through which electricity can be transferred. The secondary coil, which is in the phone, receives the power from electromagnetic field and converts in back into electric current to feed it into the battery. 

The technology is still in the early stages and it works best when the distance between the two coils is few millimeters. That's the reason why users have to place the device on the charger. 

The main benefit of wireless charging is that it removes one more wire. This not only makes it easier to charge the phone but also has aesthetic appeal. At the same time, wireless charging has poor efficiency. This means it takes longer to charge the battery through wireless charger. 

Galaxy S3 is not the first phone to use wireless charging. Three years ago Palm commercialized the technology and sold a charger called Touchstone that allowed phones like Pre and Pixi to be charged wirelessly. Powermat is another company that sells special chargers, which can be used with iPhone and other devices for wireless charging.

After introducing the technology in 2009, Palm supported it in almost all of its devices. Even Touchpad, which was introduced in the market last year after Palm had been acquired by HP, had this feature. Of course, Palm is dead now.

There is a chance that Samsung is doing things differently. But that is not apparent. The company says that to charge Galaxy S3 wirelessly, users will have to keep the device on the 'special charger'. This is exactly how Touchstone worked.