Nigeria: 25-Year-Old Nigerian Invents Electricity Generating Football

[ScienceRocks]

Nigeria: 25-Year-Old Nigerian Invents Electricity Generating Football
By Isiaka Wakili, 17 August 2013

allAfrica.com: Nigeria: 25-Year-Old Nigerian Invents Electricity Generating Football

Jessica Mathew, a 25-year-old Nigerian, from Edo State, yesterday presented an electricity generating football and skipping rope she invented to President Goodluck Jonathan at the State House in Abuja.

The presentation earned Jessica an appointment as a soccer ambassador. The soccer ball, as demonstrated by Jessica, could generate three hours of electricity after 30 minutes of play and could store power for three days.

She said, the electricity generated by the ball could be used as electricity source to power lighting points and household equipments, adding that the airless football when not in use, could last for one-and-half years before replacement.

Jessica, a graduate of Psychology and Economics from Havard University, United States, said she taught herself Electrical and Mechanical Engineering because she was keenly interested in it.

 

[waltky]

WiFi electricity?...

Can Wireless Electricity Power the World?
March 27, 2014 ~ Remember the last time you wanted to recharge your cellphone only to discover that you forgot the electric cord somewhere else? And if you are hopelessly dependent on your cellphone and there is no replacement charger in sight, then you have a problem.

It doesn’t have to be that way, says Massachusetts Institute of Technology (MIT) spinoff WiTricity, a global producer of devices that generate wireless electricity. “The next generation of cellphones will have wireless charging in them,” says Kaynam Hedayat, WiTricity’s Vice President of Product Management and Marketing. The technology to generate wireless electricity was invented nearly 120 years ago – with significant limitations. So for wireless electricity to be transmitted at the time, “the device that is the source of the power or electricity and the device that is receiving it … have to be exactly aligned and in very close proximity – less than one millimeter,” said Hedayat.

But in 2007, MIT professor Marin Soljacic decided to tackle that problem and invented a process called “Highly Resonant Wireless Power Transfer” that uses the same principles of induction. Highly resonant devices, tuned to the same frequency, exchange energy through a magnetic field. The magnetic field transfers electricity over distances of one to several feet and allows for “positional freedom.” That means that the receiver and the transmitter need not be aligned and can move around the room while seizing power. “Resonance,” says Hedayat, “basically means that you are oscillating the magnetic field … at frequencies that are open in the frequency band, sometimes referred to as ISM band [i.e., industrial, scientific and medical radio bands reserved internationally for purposes other than telecommunications.]”

For all that to happen, a power source is needed. “That goes into a device we call the source, to refer to it as the source of wireless electricity,” said Hedayat. “This source has some electronics inside, which are very cost-effective.” Those include a coil and capacitors and inductors that generate the magnetic field. By nature, magnetic fields do not radiate energy, although they interfere with electronic devices. With WiTricity, Hedayat says the company has shielded the magnetic field to prevent such interference. But is it harmful? “It depends on how much power you want to transfer,” replied Hedayat. “For the applications that we are targeting – from cellphone applications all the way to automotive charging – it is not harmful,” he said. “And our systems are designed to meet the safety level limitations set by standards bodies around the globe.”

Hedayat argues that WiTricity is safe enough to recharge devices that are implanted in human bodies such as pacers or pumps. Such transfers use 20 watts of power over a distance of 20 centimeters. Without wireless electricity, the devices require either a “wire sticking out of the patient” or biannual or more frequent surgery to remove the battery, he said. The company also sees its technology as a viable alternative to batteries in places like oil fields and areas too hazardous for humans, deep at sea where submarines have to return to a station to recharge and in conflict zones to recharge military equipment.

More Can Wireless Electricity Power the World? « Techtonics

 

[JQPublic1]

The resurgence of African genius and innovation is refreshing. For decades now, bright and promising young African minds have astonished doubters around the world. But I wonder if this news is what those who lust for Africa's riches want to hear. I am looking forward to monitoring the responses to this op. After all USMB is full of critics who never see anything good coming out of that continent!