Wireless Energy Transfer Possibility

Wireless Energy Transfer Possibility

Wireless energy transfer has been thought about for decades by scientists all over the world. There were many experiments done and some are successfully till some extent.

In 2009, US researchers have successfully tested an experimental system to deliver power to devices without the need for wires.

The experimental setup consisted of two 60cm (2ft) diameter copper coils, a transmitter attached to a power source and a receiver placed 2m (7ft) away and attached to a light bulb. WiTricity, as it is called, exploits simple physics and could be adapted to charge other devices such as laptops.

The bulb was even made to glow when obstructions such as wood, metal and electronic devices were placed between the two coils.

“There is nothing in this that would have prevented them inventing this 10 or even 20 years ago,” commented Professor Sir John Pendry of Imperial College London who has seen the experiments.

The system should not present any significant health risk to humans as the body has almost zero response to magnetic fields in terms of the amount of power it absorbs.

First Commercial Wireless Electricity Experiment in Japan:

Currently Japanese scientists are set to test the largest wireless electricity transmission ever attempted in a Tesla like spectacle that is sure to capture a great amount of attention and spark strong interest and support for a technology that could change the World. The event is to take place at the Tokyo Tower, the largest man made structure in Japan, at 1100 feet tall.

The night time experiment is meant to illuminate the top spire of the mammoth steel structure to demonstrate the use of the first wireless electricity transfer system in the World. The test is designed to transfer about 1200 watts of power at a range of 100 feet and will be a first of its kind use of system Japanese scientists are developing to transmit power at distances they hope could reach 300 feet using a science that is based on magnetically coupled resonance.

The market for wireless electricity transfer is enormous; the Japanese Government thinks the first application would be electric vehicle charging. Chargers would be embedded into parking spaces, the vehicles would automatically charge eliminating the hassle of constantly plugging in. The automobile would be virtually maintenance free. And to promote this idea the Japanese government envisions thousands of free charging spaces located around Tokyo.

Silent Sound Technology

You are in a movie theatre or noisy restaurant or a bus etc where there is lot of noise around is big issue while talking on a mobile phone. But in the future this problem is eliminated with ”silent sounds”, a new technology unveiled at the CeBIT fair on Tuesday that transforms lip movements into a computer-generated voice for the listener at the other end of the phone.

The device, developed by the Karlsruhe Institute of Technology (KIT), uses electromyography, monitoring tiny muscular movements that occur when we speak and converting them into electrical pulses that can then be turned into speech, without a sound uttered.

‘Silent Sound’ technology aims to notice every movement of the lips and transform them into sounds, which could help people who lose voices to speak, and allow people to make silent calls without bothering others. Rather than making any sounds, your handset would decipher the movements your mouth makes by measuring muscle activity, then convert this into speech that the person on the other end of the call can hear. So, basically, it reads your lips.

“We currently use electrodes which are glued to the skin. In the future, such electrodes might for example by incorporate into cell phones,” said Michael Wand, from the KIT.

The technology opens up a host of applications, from helping people who have lost their voice due to illness or accident to telling a trusted friend your PIN number over the phone without anyone eavesdropping — assuming no lip-readers are around. The technology can also turn you into an instant polyglot. Because the electrical pulses are universal, they can be immediately transformed into the language of the user’s choice.

“Native speakers can silently utter a sentence in their language, and the receivers hear the translated sentence in their language. It appears as if the native speaker produced speech in a foreign language,” said Wand.

The translation technology works for languages like English, French and Germans, but for languages like Chinese, where different tones can hold many different meanings, poses a problem, he added.

Noisy people in your office? Not any more. “We are also working on technology to be used in an office environment,” the KIT scientist told AFP.

The engineers have got the device working to 99 percent efficiency, so the mechanical voice at the other end of the phone gets one word in 100 wrong, explained Wand.

“But we’re working to overcome the remaining technical difficulties. In five, maybe ten years, this will be useable, everyday technology,” he said.

High Speed Downlink Packet Access (HSDPA)

High Speed Downlink Packet Access (HSDPA)

High Speed Downlink Packet Access (HSDPA)

High Speed Downlink Packet Access (HSDPA)

High Speed Downlink Packet Access (HSDPA) is a packet based technology for W-CDMA downlink with data transmission rates of 4 to 5 times that of current generation 3G networks (UMTS) and 15 times faster than GPRS. The latest release boosts downlink speeds from the current end-user rate of 384 kbps (up to 2 Mbps according to standards) to a maximum value according to standards of 14.4 Mbps. Real life end-user speeds will be in the range of 2 to 3 Mbps.

HSDPA provides a smooth evolutionary path for Universal Mobile Telecommunications System (UMTS) networks to higher data rates and higher capacities, in the same way as Enhanced Data rates for GSM Evolution (EDGE) does in the Global System for Mobile communication (GSM) world. The introduction of shared channels for different users will guarantee that channel resources are used efficiently in the packet domain, and will be less expensive for users than dedicated channels.

HSDPA was introduced in the Third Generation Partnership Project (3GPP) release 5 standards. Assuming comparable cell sizes, it is anticipated that by using multi-code transmission it will be possible to achieve peak data rates of about 10 Mbit/s (the maximum theoretical rate is 14.4 Mbit/s). This will result in a six- to seven-fold throughput increase during an average downlink packet session compared with the Downlink Shared CHannel (DSCH) standards of 3GPP release 99.

3GPP standards beyond release 5 will aim to achieve further throughput increases, say peak data rates in the range 20 to 30 Mbit/s, by using Multiple Input Multiple Output (MIMO) or other antenna array techniques, and possibly asymmetric allocation of frequency spectrum in multi-carrier cells (e.g. a further 100% downlink packet session throughput increase by allocating an additional 5 MHz unpaired band).

HSDPA achieves its performance gains from the following radio features:

High speed channels shared both in the code and time domains

Adaptive modulation and coding schemes: Quadrature Phase Shift Keying (QPSK) and 16QAM (Quadrature Amplitude Modulation).

Hybrid Automatic Repeat reQuest (HARQ) retransmission protocol.

Short transmission time interval (TTI)

Fast packet scheduling controlled by the Medium Access Control – high speed (MAC-hs) protocol in Node B.

Fast scheduling

HSDPA will make life easy for 3G customers, providing vastly better service for both corporate users and individuals, with data delivered at speeds comparable to or better than fixed-line broadband access systems.

Corporate users will have easy and secure mobile access to corporate networks, with rapid retrieval and downloading of confidential corporate information.

Consumers will enjoy superior quality for video services, including video streaming and gaming.

All customers will enjoy fast Web browsing, with rapid access to graphics-heavy Internet sites.

With the availability of HSDPA notebook cards (and a deployed network), the question will be, with ubiquitous HSDPA coverage, will anyone pay for a hotspot service available at only selected locations? There are two possible scenarios where they might. Bandwidth at Wi-Fi hotspots may be hugely price competitive, or even free; and Wi-Fi will come pre-installed on many notebooks. The success of the Intel Centrino platform will see the majority of notebooks ship with in-built WLAN support by the end of 2005, and slotting in an additional wireless card may be overkill for some users. However, with Intel planning to add W-CDMA to Centrino next year, HSDPA may also be on its wireless technology checklist.

As HSDPA settles more into mainstream awareness, we should expect the usual levels of hype to start flying. Already, the technology is being flagged as a potential competitor to DSL, placing a lucrative portion of fixed-line operator customers in the hands of the cellular providers. WiMAX is another opponent being lined-up for a bout with HSDPA. How effectively the 3G upgrade can compete in these arenas will depend on infrastructure cost and coverage density. Regardless, we must admit that the introduction of this new cellular standard has made things a little more interesting.

Fuel of the Future : Hydrogen

Hydrogen fuel

Hydrogen fuel

Hydrogen fuel does not occur naturally on Earth and thus is not an energy source, but is an energy carrier. Currently it is most frequently made from methane or other fossil fuels. However, it can be produced from a wide range of sources (such as wind, solar, or nuclear) that are intermittent, too diffuse or too cumbersome to directly propel vehicles. Integrated wind-to-hydrogen plants, using electrolysis of water, are exploring technologies to deliver costs low enough, and quantities great enough, to compete with traditional energy sources. The key is water, more a country having water , more powerfull it will be.So save water.