Schafer C.A.,Wireless Generation
The adaptive beam pointing concept has been revisited for the purpose of controlled transmission of laser energy from an optical transmitter to a target. After illumination, a bidirectional link is established by a retro-reflector on the target and an amplifier-phase conjugate mirror (A-PCM) on the transmitter. By setting the retro-reflector's aperture smaller than the diffraction limited spot size but big enough to provide sufficient amount of optical feedback, a stable link can be maintained and light that hits the retro-reflector's surrounded area can simultaneously be reconverted into usable electric energy. The phase conjugate feedback ensures that amplifier's distortions are compensated and the target tracked accurately. After deriving basic arithmetic expressions for the proposed system, a section is devoted for the motivation of free-space laser power transmission which is supposed to find varied applicability in space. As an example, power transmission from a satellite to the earth is described where recently proposed solar power generating structures on high-altitude s receive the power above the clouds to provide constant energy supply. In the experimental part, an A-PCM setup with reflectivity of about RA-PCM = 100 was realized using a semiconductor optical amplifier and a photorefractive self-pumped PCM. Simulation results show that a reflectivity of RA-PCM>1000 could be obtained by improving the selfpumped PCM's efficiency. That would lead to a transmission efficiency of n>90%. ©2010 Optical Society of America. Source
News Article | November 23, 2010
Rupert Murdoch is getting serious about the education business. First, News Corp (NSDQ: NWS) hires New York City Education Chancellor Joel Klein. Now, it’s acquiring 90 percent of Wireless Generation for roughly $360 million in cash. The Brooklyn-based company provides education technology for teachers. The company will operate as an independent subsidiary managed by Larry Berger, the founder and CEO; Josh Reibel, president and COO; and Laurence Holt, EVP & Chief Product Officer; the three will retain the remaining 10 percent. Founded in 2000, Wireless Generation has 400 employees and says it serves more than 200,000 teachers and 3 million students in all 50 states. Why is News Corp buying it? Murdoch says it’s because education in the U.S. is a $500 billion sector “waiting desperately to be transformed by big breakthroughs that extend the reach of great teaching” and Wireless Generation is at the “forefront” of individualized, tech-based learning. Maybe Klein, who was hired to advise on “developing business strategies for the emerging educational marketplace,” among other topics, can articulate a little better about why News Corp has decided at this stage to make a bet on education — and how it means to go about it. Wireless Generation includes the New York City school system as a client. In addition to reporting to Murdoch as EVP, Office of the Chairman, Klein’s also joining the News Corp. board. If this is like other Murdoch endeavors to break into a space, we’re due for more announcements. Perhaps he could combine the passions for digital text and education by buying textbook e-reader startup Kno.
News Article | February 16, 2012
Jobs, jobs everywhere, and not a worker to fill them. In a city with nine percent unemployment, 17 Dumbo tech companies are struggling to fill 329 jobs in web development, mobile development, gaming and other related jobs, reports the New York Post. The agency HUGE needs to hire 50 people; Wireless Generation needs 150. Even DigitalDumbo, the local meetup and tech blog, is hiring a community manager. “We are growing and positions open frequently!” says Carrot Creative. Local startups say the answer is for NYU to close that deal on an applied sciences grad school in Downtown Brooklyn. (Guess they figure students who have from the Roosevelt Island tech campus will be snapped up by some other startup on the way to the interview.) Dumbo, despite its cute cobblestones, has struggled for decades to recover from the decline of its manufacturing and industrial economy. But now that the area has a number of trendy young companies (Etsy! Holstee!), it’s being choked by its own growth. Almost two months into the new year, and Ben Parr’s rather obvious 2012 prognosticating is looking rather obviously correct. Mr. Parr! What will happen to Dumbo? UPDATE: A spokesman for Wireless Generation says they’re not having trouble hiring—they’re just growing that fast. See comment below.
News Article | August 30, 2011
Much has happened since the News of the World phone hacking scandal erupted in July (a little more than one month ago), leading to an almost immediate shutdown of the 168-year-old London-based paper. World events being what they are, time has moved on very quickly since the scandal first broke, with East Coast hurricanes and earthquakes, East African famines, and North African revolutions dominating headlines. However until the story ends, and until the perpetrators are in jail, News Corp. owner Rupert Murdoch, his son James, and associates will continue to be called before the British Parliament and the courts to answer further rounds of questions about their involvement. Just last week a News Corp. subsidiary Wireless Generation, lost a $27 million contract with the State of New York in the wake of the phone hacking news. But that does not meant that this is the end of phone hacking. It’s too easy to pull off to end completely. At the offices of news wire service Reuters, renowned hacker and ‘Ghost in the Wires‘ author, Kevin Mitnick shows how little it takes to crack into someone’s phone without their knowledge: For all the damage that has been caused to the media giant, perhaps what is most surprising is that the technology needed to hack phones is quite simple. Just sign up for a “spoofing” service, and you’re able to call a phone as if it were the owner dialing into his or her voicemail. No password is required, and you’re ready to start snooping. The question that remains, of course, not why it’s so easy to sign up for a spoofing service, but why people need them in the first place. We’re not condoning the use of phone hacking software by anyone, but here’s a little word of advice; if you run a multi-billion dollar media conglomerate, or even if you’re a jilted lover wanting to snoop on an ex, what you’re likely to find out from voice mails is not worth the risk of getting caught in the first place. Don’t you feel slightly creepy at how unsafe your data is?
Dinc E.,Wireless Generation |
Akan O.B.,Wireless Generation
IEEE Wireless Communications Letters
Troposcatter communication can be used as a communication medium for beyond-line-of-sight (BLOS) links. However, wave propagation in troposphere shows significant dependence on hydro-meteors: especially rain. Therefore, the main motivation of this paper is to develop a rain attenuation model for troposcatter communications, which can model nonuniform multiple rain cells for the first time. At the end, we present simulation results for the amount of rain loss and the distribution of maximum data rates under rain in troposcatter links. © 2012 IEEE. Source