Goodbye wires…

The key: Magnetically coupled resonance
In contrast, WiTricity is based on using coupled resonant objects. Two resonant objects of the same resonant frequency tend to exchange energy efficiently, while interacting weakly with extraneous off-resonant objects. A child on a swing is a good example of this. A swing is a type of mechanical resonance, so only when the child pumps her legs at the natural frequency of the swing is she able to impart substantial energy.

Another example involves acoustic resonances: Imagine a room with 100 identical wine glasses, each filled with wine up to a different level, so they all have different resonant frequencies. If an opera singer sings a sufficiently loud single note inside the room, a glass of the corresponding frequency might accumulate sufficient energy to even explode, while not influencing the other glasses. In any system of coupled resonators there often exists a so-called "strongly coupled" regime of operation. If one ensures to operate in that regime in a given system, the energy transfer can be very efficient.

While these considerations are universal, applying to all kinds of resonances (e.g., acoustic, mechanical, electromagnetic, etc.), the MIT team focused on one particular type: magnetically coupled resonators. The team explored a system of two electromagnetic resonators coupled mostly through their magnetic fields; they were able to identify the strongly coupled regime in this system, even when the distance between them was several times larger than the sizes of the resonant objects. This way, efficient power transfer was enabled.

Magnetic coupling is particularly suitable for everyday applications because most common materials interact only very weakly with magnetic fields, so interactions with extraneous environmental objects are suppressed even further. "The fact that magnetic fields interact so weakly with biological organisms is also important for safety considerations," Kurs, a graduate student in physics, points out.

meira um þetta efni á http://web.mit.edu/newsoffice/2007/wireless-0607.html

IBM hefur tækni til að niðurhala efni a 160 Gg/s !

IBM scientists will reveal a prototype optical transceiver chipset which they claim will allow instantaneous feature length movie downloads. According to IBM, the transceiver is fast enough to reduce the download time for a typical high definition feature-length film to a single second compared to 30 minutes or more it takes today.

The ability to move information at speeds of 160 Gigabits in a single second provides a glimpse of a new era of high-speed connectivity that will transform communications, computing and entertainment. Optical networking offers the potential to dramatically improve data transfer rates by speeding the flow of data using light pulses, instead of sending electrons over wires.

The prototype optical chipset, created by IBM Research, measures only 1/15th the area of a US 10 cent coin, but is capable of transmitting the equivalent of 4 million simultaneous telephone conversations. The chip can transmit movies, music and photo downloads at an astonishing 160 billion bits per second. At these speeds, a full length high-definition DVD could be downloaded in just a single second.

"The explosion in the amount of data being transferred, when downloading movies, TV shows, music or photos, is creating demand for greater bandwidth and higher speeds in connectivity," said Dr. T.C. Chen, vice president, Science & Technology, IBM Research. "Greater use of optical communications is needed to address this issue. We believe our optical transceiver technology may provide the answer."

As the amount of data transmitted over networks continues to grow, researchers have been looking for ways to make the use of optical signals more practical. The ability to use these signals could offer previously unheard of amounts of bandwidth and enhanced signal fidelity compared to current electrical data links. By shrinking and integrating the components into one package, and building them with standard low-cost, high-volume chip manufacturing techniques, IBM claims to be making optical connectivity viable for widespread use.

YSP Sound Projectors

Yamaha YSP-1100 heimabíó

YSP-1100 er ný uppfærsla af hinum vinsæla YSP-1000. Um er að ræða fullkomið heimabíó og afar hentug lausn fyrir þá sem vilja hafa gott heimabíó en samt vera laus við stóran magnara, snúrur og hátalara um alla stofuna.
YSP-1100 er stóri bróðir hins geysivinsæla YSP-900 og kemur nú í stærri og meiri umbúðum. Tækið samanstendur af 40 littlum stafrænum kraftmögnurum sem eru á bakvið hvern af þeim 40 stefnuvirku smáhátölurum sem tækið hefur að bjóða ásamt tveimur bassahátölurum. 

Þetta glæsilega tæki hentar bæði sem heimabíókerfi jafnt sem hefðbundnar heimilisgræjur. Þetta tæki kemur í svörtu og silfurlituðu og passar því fullkomlega við LCD- eða Plasma sjónvörp og er hannað með 42" flatsjónvörp í huga.
Tækið er mjög einfalt í uppsetningu. Í tækinu er valmyndarkerfi sem tengist með Composite myndtengi í sjónvarpstækið þitt þar sem þú ferð í gegnum stærð rýmis, fjarlægð, staðsetningar svo fátt eitt sé nefnt. Eftir búið er að setja inn helstu upplýsingar þá aðlagar tækið sig eftir aðstæðum með hljóðnemanum sem kemur með pakkanum og notar sérstaka tækni sem heitir IntelliBeam sem er skrásett vörumerki frá Yamaha. Með þessu ertu að segja tækinu hvar þú ert og aðlagar tækið sig eftir því, plús mælir rýmið og skynjar veggina sem það notar til hljóðdreifingar. 

YSP-1100 er með eftirfarandi hljóðblöndun: Dolby Digital, DTS, Dolby Pro Logic II (Movie, Music and Game) and DTS Neo:6 (Cinema and Music). Enn fremur býður tækið upp á mismunandi heimabíó: 5 Beam, 3 Beam, Stereo + 3 Beam, Stereo and Target Mode og 7 CINEMA DSP tónlistarstillingar.


http://www.hataekni.is/vorur/hljomtaeki/ysp/pnr/427

Wireless GSM (Tieline Commander and i-Mix G3)

Today's highly successful GSM wireless technology has become the world's leading and fastest growing mobile standard, spanning over 190 countries. GSM technology is used by 1 in 7 of the world's population and it is estimated that by the end of 2004 it will top one billion*.

Tieline technology has released the new GSM module for G3 codecs which takes advantage of the GSM mobile telephone circuit switched protocol enabling 7kHz audio to be transferred over standard GSM networks in the US and up to 15kHz audio over High Speed Circuit Switched networks in Europe, Asia and Canada. Tieline is the first GSM enabled codec to provide an auxiliary data stream that enables studio engineers to control the audio input levels of their remote talent. Remote channel on/off button control can also be activated enabling the studio to have complete control over the remote talent’s microphone.

Tieline also provides several remote power options including an in-car cigarette lighter 12 volt power supply, a desktop 8amp hour UPS Lithium battery or a 2.3amp hour lithium battery module which slots into the side of the codec and enable broadcasters to set up anywhere in the field and deliver the equivalent of a POTS or ISDN broadcast without any wires at all.

http://www.tieline.com/Tieline_04/codecs/GSM_G3.html

Upphafið

Loksins er þessi tæknisíða komin upp! Hér munu koma sannkallaðir tæknimolar og áhugaverðar greinar sem allir munu hafa gaman af. Ritsjóri mun einbeita sér að spennandi nýjungum í tæknigeiranum, og þar er úr miklu að moða þar sem tæknin á 21 öld er í gríðarlegri sókn.