SubNews

Julho, 11, 2007

1. Amadeu e o espectro radioelétrico
2. Clay Shirky fala sobre suporte colaborativo
3. Google dominando
4. Web desktop vs computer desktop

Amadeu e o espectro radioelétrico

O espaço de transmissão das ondas de rádio é chamado de espectro radioelétrico. Ele é dividido em faixas de freqüência. No passado não muito distante, em quase todo o mundo, as forças armadas usavam a faixa de 2,4 GHz para realizar parte de sua comunicação. Como o uso militar do espectro caminhou para freqüências mais altas, e com a disseminação da comunicação por satélite, essa faixa foi destinada para a comunicação médica. No final, a faixa acabou sem ocupação regulamentada, ou seja, tornou-se aberta ou livre. Em 1996, a IEEE (Institute of Electrical and Electronic Engineers), que possui aproximadamente 380 mil associados de 150 países, aprovou o protocolo de comunicação 802.11b, também conhecido como protocolo do Wi-Fi (Wireless Fidelity).

Clay Shirky fala sobre suporte colaborativo

Noted Internet thinker and author Clay Shirky delivered one of the opening "provocations" at Supernova 2007. Using a 1300-year-old Japanese shrine as a metaphor, Clay explained how the New Network changes the basic dynamics of business and collective creativity. [vídeo .mov]

Google dominando

"If you have multiple phone numbers [eg, home, work, cell], you get one phone number that you can set to ring all, some, or none of your phones," Wesley Chan, a Google product manager, said [about the GrandCentral acquisition] in a blog post on his company's website.
"This way, your phone number is tied to you, and not your location or job," he said.

Rather than competing directly with the likes of Vodafone or China Telecom, many of these newer web-based calling services are focused on incorporating phone-like talk features into internet services on blogs or social network sites like MySpace or Facebook.
Konstantin Guericke, the co-founder of Silicon Valley-based business networking site LinkedIn, took over as the chief executive of web-calling service Jaxtr late last year.
"The way I see it, social networks and blogs are about communication and the phone hasn't been really in the mix," Guericke said, following news of Google's acquisition.

Can Web Apps Ever Truly Replace Desktop Apps?

By Zonk on letting-it-all-hang-online
tooger writes "Matt Hartley from MadPenguin.org opines that web apps can never replace desktop applications, for a variety of reasons. He writes, 'Some of you may point out that the data stored on your hard drive is not of any real consequence, but I would disagree. It is more than probable that a skilled, disgruntled employee of the company you trust with your data could ... sell off your personal information.' Given the real danger of privacy concerns, identity theft, and uptime, will web-based applications ever truly replace locally hosted software?"