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19 Apr 2018, 17:15 HRS IST
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SC says courts are not the place to settle business or political rivalry which has to be fought in markets or electionsThe PILs were without any truth and attempt was made to malign the judiciary: SCSC says it thought of initiating contempt proceedings against petitioners but decided not to go ahead with itSC says during arguments, counsel for petitioners forgot to maintain institutional civility towards judges and made wild allegationsSC criticises attempts by senior advocates and activist lawyers to make insinuations against judges including that of the apex courtSC says frivolous and motivated litigation has been filed to settle political rivalryIt becomes clear that with these petitions real attempt and frontal attack was made on independence of judiciary: SCDocuments placed on record and their scrutiny establishes that Loya's death was due to natural cause: SCThere is no reason to doubt statements of four judges on circumstances leading to the death of Loya: SCSC says attempts were made to scandalise judiciary by levelling serious allegations against judicial officers and judges of Bombay HCSC dismisses pleas to probe alleged mysterious death of CBI judge B H Loya, who was hearing Sohrabuddin Sheikh fake encounter case
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  • New wi-fi system to provide 100 times faster internet
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  • London, Mar 19 (PTI)
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    cientists have developed a new wireless internet based on harmless infrared rays that is 100 times faster than existing wi-fi network and has the capacity to support more devices without getting congested.

    low wi-fi is a source of irritation that nearly everyone experiences. Wireless devices in the home consume ever more data, and it is only growing, and congesting the wi-fi network, researchers said.

    The wireless network developed by researchers at Eindhoven University of Technology in The Netherlands not only has a huge capacity - more than 40 Gigabits per second (Gbit/s) - but also there is no need to share since every device gets its own ray of light.

    The system is simple and cheap to set up. The wireless data comes from a few central 'light antennas', for instance mounted on the ceiling, which are able to very precisely direct the rays of light supplied by an optical fibre.

    The antennas contain a pair of gratings that radiate light rays of different wavelengths at different angles ('passive diffraction gratings').

    Changing the light wavelengths also changes the direction of the ray of light. Since a safe infrared wavelength is used that does not reach the vulnerable retina in your eye, this technique is harmless.

    If you walk around as a user and your smartphone or tablet moves out of the light antenna's line of sight, then another light antenna takes over, researchers said.

    The network tracks the precise location of every wireless device using its radio signal transmitted in the return direction, they said.

    It is a simple matter to add devices: they are assigned different wavelengths by the same light antenna and so do not have to share capacity.

    Moreover, there is no longer any interference from a neighbouring wi-fi network.

    Current wi-fi uses radio signals with a frequency of 2.5 or five gigahertz.

    The new system uses infrared light with wavelengths of 1,500 nanometres and higher.

    This light has frequencies that are thousands of times higher, some 200 terahertz, which makes the data capacity of the light rays much larger.

    Researchers managed to achieve a speed of 42.8 Gbit/s over a distance of 2.5 metres. Even if you have the very best wi-fi system available, you would not get more than 300 Megabit/s in total, which is some hundred times less than the speed per ray of light achieved by the new system.

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