wireless electricity

WiTricity, a portmanteau for "wireless electricity", is a trademark of WiTricity corporation referring to their devices and processes which use a form of wireless energy transfer, the ability to provide electrical energy to remote objects without wires using oscillating magnetic fields. The term WiTricity was used for a project led by Prof. Marin Soljačić in 2007

Overview

WiTricity is based on strong coupling between electromagnetic resonant objects to transfer energy wirelessly between them. This differs from other methods like simple induction, microwaves, or air ionization. The system consists of transmitters and receivers that contain magnetic loop antennas critically tuned to the same frequency. Due to operating in the electromagnetic near field, the receiving devices must be no more than about a quarter wavelength from the transmitter (which is a few meters at the frequency used by the example system). In their first paper, the group also simulated GHz dielectric resonators.

Unlike the far field wireless power transmission systems based on traveling electro-magnetic waves, WiTricity employs near field inductive coupling through magnetic fields similar to those found in transformers except that the primary coil and secondary winding are physically separated, and tuned to resonate to increase their magnetic coupling. These tuned magnetic fields generated by the primary coil can be arranged to interact vigorously with matched secondary windings in distant equipment but far more weakly with any surrounding objects or materials such as radio signals or biological tissue.

In particular, WiTricity is based on using 'strongly-coupled' resonances to achieve a high power-transmission efficiency. Aristeidis Karalis, referring to the team's experimental demonstration, says that "the usual non-resonant magnetic induction would be almost 1 million times less efficient in this particular system". The researchers suggest that the exposure levels will be below the threshold for FCC safety regulations, and the radiated-power levels will also comply with the FCC radio interference regulations.

It has been more than 100 years since this technology was initially discovered. Researchers attribute the delay to develop the technology to limitations of well-known physical laws and a simple lack of need. Only recently have modern consumers obtained a high number of portable electronic devices which currently require batteries and plug-in chargers

Experimental demonstration

The MIT researchers successfully demonstrated the ability to power a 60 watt light bulb wirelessly, using two 5-turn copper coils of 60 cm (24 in) diameter, that were 2 m (7 ft) away, at roughly 45% efficiency. coils were designed to resonate together at 9.9 MHz and were oriented along the same axis. One was connected inductively to a power source, and the other one to a bulb. The setup powered the bulb on, even when the direct line of sight was blocked using a wooden panel.

The emerging technology was demonstrated by Eric Giler, CEO of the US firm WiTricity, at the TED Global Conference held at Oxford in July 2009. In this demonstration, Giler shows a WiTricity power unit powering a television as well as three different cell phones.

Mass whipping of women to cast away ‘evil spirit’

In a strange ritual, more than 2,000 women including school-going teen-aged girls, who were believed to be ‘possessed’ by evil spirits were given vicious whip lashes to “free them from these bad elements” at the annual festival of the ancient Sri Achappan Temple at Bavithram Vellalapatti, a remote village situated on the border of Tiruchi and Namakkal districts, on Monday, the Vijayadasami DaY

The men priests, dressed in traditional attire, cracked whips on the ‘possessed’ women, the salvation seekers, who sat in a half-kilometre-long queue for nearly five hours on a sprawling open space called ‘lashing ground’ near the temple.

Many of them were young school and college-going girls, who winced when they received the lashes and writhed in pain on the ground. The long and wieldy whips, which descended on them in full ferocity, had left them gasping for breath, causing burning marks of wounds on them and forcing them to sob and cry in searing pain. Many were given three to four flogs to drive away the ‘multiple spirits’ that possessed them.

Vanita, a twelfth standard student from a nearby village, who received the lash, was holding both her hands in pain. Sobbing uncontrollably, she told The Hindu that she had to sit on the queue as her parents insisted. As she was not showing interest in studies, they believed that an evil spirit had possessed her, preventing her from scoring high marks. "They forced me. Now my friends will look at me suspiciously once they know that I attended the festival, known for curing mental disorders,” she said.

Vanita was not the only girl student to be flogged against her wishes and to face taboo back at home. Many of her age and even those younger, in the age group of 11 and 12 and studying, had undergone the ordeal to drive away the presumed extraterrestrials that did not permit them to study well.

Another girl, about 16, from a village in Dindigul district was brought to the 'lashing ground’ as she was yet to attain puberty and another for her irregular menstrual periods. Even a newly wed wife, accompanied by her husband, attended it saying that her in-laws had told her that she was 'possessed.’

“A lash here will cure all these ills, physical and mental, that afflict women,” said a 60-year old Chelli, a regular receiver of lashes in the temple for the past decade. Her hands bore criss-cross marks of scars from wounds she received from the whips.

Asked if the practice was not a crime, the temple priest and co-ordinator, Kulla Goundan, of Kurumbar descent, said it was not so. “It is a belief of devotees and the practice is in vogue for long. We cannot alter [that],” he said. Nearly 10,000 people gathered for the festival, which concluded on Tuesday.

Snake with a Foot Discovered in China

A snake measuring sixteen inches long has been discovered in China by Dean Qiongxiu, making its grand entrance by clinging to the bathroom wall with a clawed talon.

Unfortunately, its life was cut short when she beat it to death with a shoe as it attempted to defy evolution and scurry across the wall using its single foot. Preserving the specimen in alcohol, it was turned over to the Department of Life Sciences at West Normal University in Nanchang.

According to resident snake expert Long Shuai, the cause of the foot remains unknown, though an autopsy may reveal why. This biological anomaly is in a way similar to the growth of an extra head, which shares similarities in the way humans develop into conjoined twins.

Unlike two-headed snakes, however, human conjoined twins don’t often attack each other. A snake with two heads has little chance of surviving for a long time in the wild, though one can only guess the physical limitations or advantages a snake with an extra foot might have.

It’s only a matter of time before regular snakes evolve into walking monsters and take over the world.

Sri lanka

FACTS

1. Chewing on gum while cutting onions can help a

Person from stop producing tears. Try it next time you chop onions!!!!!!!!!!

2. Until babies are six months old, they can breathe and swallow at the same time. Indeed convenient!

3. Offered a new pen to write with, 97% of all people will write their own name.

4. Male mosquitoes are vegetarians. Only females bite (suck blood) as they need protein to lay eggs.

5. The average person's field of vision encompasses a 200-degree wide angle.

6. To find out if a watermelon is ripe, knock it, and if it sounds hollow

Then it is ripe.

7. Canadians can send letters with personalized postage stamps showing their own photos on each stamp.

8. Babies' eyes do not produce tears until the baby is approximately six to eight weeks old.

9. It snowed in the Sahara Desert in February of 1979.

10. Plants watered with warm water grow larger and more quickly than plants watered with cold water.

11. Wearing headphones for just an hour will increase the bacteria in your ear by 700 times.

12. Grapes explode when you put them in the microwave.

13. Those stars and colours you see when you rub your eyes are called phosphenes.

14. Our eyes are always the same size from birth, but our nose and ears never stop growing

17. At 40 Centigrade a person loses about 14. 4 calories per hour by

Breathing.

18. There is a hotel in Sweden built entirely out of ice; it is rebuilt

Every year.

19. Cats, camels and giraffes are the only animals in the world that walk

Rightfoot, right foot, left foot, left foot, rather than right foot,left

Foot...

20. Onions help reduce cholesterol if eaten after a fatty meal.

21. The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.

22. In most watch advertisements the time displayed on the watch is 10:10 because then the arms frame the brand of the watch

And make it look=20 like it's smiling.

23. The color blue can have a calming affect on people.

24. Depending upon the shade, the brain may send up to 11 tranquilizing

Chemicals to calm the body

25. Leonardo DA Vinci could write with the one hand and draw with the other simultaneously. Now we know why his pictures were exquisite!!

26. Names of the three wise monkeys are: Mizaru (See no evil), Mikazaru(Hear no evil), and Mazaru (Speak no evil).

27. The only 2 animals that can see behind itself without turning it's head are the rabbit and parrot.

28. The only 15 letter word that can be spelled without repeating a letter is uncopyrightable.

29. Babies are born without knee caps. They don't appear until the child

Reaches 2-6 years of age

30. The names of the continents all end with the same letter with which they start.

"Dear God" Letters from Kids (Cute!)

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MS Freedom of the Seas……4300 passenger Capacity Inside


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