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Showing posts with label by. Show all posts

Future iPhones May be powered by Li Fi Light FiCapabilty a Technology With Transfer Speeds 100x Faster Than Wi Fi

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iOS code shows Apple is experimenting with the new ultra fast, light-based Li-Fi (light Fidelity) wireless data for future iPhones

Recent versions of iOS have been found to contain references to Li-Fi, an experimental high-speed wireless networking protocol that uses pulses of light to transmit data and is being marketed as a long-term replacement for Wi-Fi.
Beginning with iOS 9.1, the operating systems library cache file makes mention of "LiFiCapability" alongside other hardware and software capability declarations. The change was spotted by Twitter user Chase Fromm and independently confirmed by AppleInsider.

Li-Fi works in a way not entirely unlike a traditional infrared remote control. Data is transmitted by rapidly modulating a light source, and received with a light sensor before being reassembled into an electronic signal.

Unlike your television remote, Li-Fi uses visible light and the modulation happens in a manner imperceptible to the human eye: that means the same bulb that lights your hallway can act as a data access point. Its also much faster, with theoretical throughput capacity of up to 224 gigabits per second.

Li-Fi is still in the experimental phase, but a number of companies are working to commercialize the technology. At least one firm, India-based Velmenni, has already begun real-world testing.

In addition to the software references, Apple is known to be working on hardware implementations for light-based wireless data transfer, or optical wireless communication.

A patent application filed in 2013 and assigned to Apple describes a method of "optical modulation using an image sensor." The sensor in question could be switched between image capture and data capture modes, allowing for light capabilities without adding additional hardware.

Apple envisions this particular system being used for indoor location, but the general principle is the same as more high-bandwidth applications.


Appleinsider.com
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Largest known prime number discovered by computer in Missouri

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Largest known prime number discovered by computer in Missouri

Prime numbers are indispensable in computer encryption, these numbers according to principle are only divisible by 1 and themselves. 

A computer at a University in Missouri was said to have lately discovered a new prime number which is about 22 million digits long and 5 million longer than the the earlier known prime number.
The discovered prime is written as 2^74,207,281-1, which denotes two, multiplied by itself 74,207,280 times, with one subtracted afterwards.

Uses of Large Prime Numbers

Large prime numbers are used basically for encryption in online banking, shopping and message computing systems, the current encryption system uses prime numbers in its hundreds and not millions compared to the recent discovery.

"This prime is too large to currently be of practical value," the Gimps project admitted in a statement . However, searching for large primes is intensive work for computer processors and can have
unexpected benefits.

"One prime project discovered that there was a problem in some computer processors that only showed up in certain circumstances," said Dr Steven Murdoch, cybersecurity expert at University College London.
Source: BBC
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