Friday, May 25, 2012

Black Voters Evolving On Gay Marriage (Atlantic Politics Channel)

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AP Source: Bobcats to interview Sloan on Friday

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Gigabit Square, Gig.U unveil gigbit-per-second broadband Internet ...

Internet

A partnership between Gigabit Squared and non-profit Gig.U will deliver superfast Internet connections to six communities across the U.S.

Six lucky communities in the U.S. will soon have Internet connections that are 100 to 1,000 times faster than what most Americans have. The new, super-fast broadband Internet connections come courtesy of a partnership between Ohio-based startup Gigabit Squared and non-profit the University Community Next Generation Innovation Project, or Gig.U for short, a coalition of 30 private and public universities.

Dubbed the Gigabit Neighborhood Gateway Program, the $200 million project aims to deliver gigabit-per-second in six communities with populations ranging from as little as 5,000 people, up to 100,000, according to the official announcement. The point of the initiative is to show what is possible with superfast Internet connections, to ignite economic development in local communities, and to push innovative services in education, health care, and scientific research.

Gigabit Squared says it plans to announce the communities where the initiative will be implemented sometime between November 2012 and March 2013.

Gig.U was founded by Blair Levin, who orchestrated the Federal Communications Commission?s 2010 National Broadband Plan. Levin currently serves as Executive Director of Gig.U.

?What makes the Gigabit Squared approach so exciting is that it goes far beyond normal industry business models in how to successfully and creatively improve broadband access speeds for university communities, which is exactly the premise upon which Gig.U was founded,? said Levin in a statement. ?We intuitively knew this, but to see Gigabit Squared emerge so strongly today proves that yes, America needs an upgrade; and that yes, there are innovators and investors willing to step up to get it done.?

To say that America ?needs an upgrade? is something of an understatement. According to Cambridge, Massachusetts-based Internet content delivery network Akamai Technologies, the U.S. currently ranks 13th in the world for Internet speed, with the average connection clocking in at about 5.8 Mbps. South Korea tops the list at 17.5 Mbps, followed by Japan and Hong Kong, both of which have average Internet speeds of around 9.1 Mbps. Even countries like Romania, Bulgaria, and the Czech Republic can load YouTube videos faster than most Americans.

Global Internet speeds

One of the primary goals of the Gigabit Neighborhood Gateway Program is to jumpstart a move toward faster Internet speeds across the U.S. Some progress has been made thanks to the FCC?s National Broadband Plan, but Mark Ansboury, president of Gigabit Squared, believes his company?s initiative holds the key to further progress.

?The Stimulus Funding was a great jumpstart to get broadband initiatives on track in the U.S.? But it is just a starting point,? said Ansboury in a statement. ?In order to realize true economic revitalization, we?re urging our national and community leaders to think and act in more creative ways. And we?re backing those efforts with significant investment of our own.?

Image via nmedia/Shutterstock

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Return of the Vacuum Tube

Yes, transistor audio amplifiers are "way more linear" with gobs of negative feedback applied, if THD, (Total Harmonic Distortion), is your measurement criterion. ANY amplifier is more 'linear' with correctly applied negative feedback. The basic premise is that added harmonics are bad - if you feed a pure sine wave into an amplifier, you want a pure sine wave at the output. The problem is that in audio, THD is a fundamentally flawed measurement with very poor correlation between lab measurements and listening tests.

THD measurements are taken as the ratio of the total power of all harmonics to the power of the fundamental, with no weighting of any kind applied. The trouble is, human hearing doesn't respond to harmonic distortions in this linear fashion - our ears find higher order harmonic distortions much more apparent and objectionable. [nutshellhifi.com]. This deficiency was noted by prominent BBC engineers D.E.L. Shorter and Norman Crowhurst in the 40's and 50's, when they proposed weighting harmonics by the square or the cube of the order; but their voices were drowned out by market forces that wanted a simple, flattering figure of merit that made the newer, more powerful pentode-based amps, (with lots of negative feedback), look better on paper than their lower-powered triode predecessors. The market won out over scientific and technical accuracy, (it usually does), and today engineers the world over, ignorant of this history, mistakenly believe that low THD is the gold standard for measuring and defining audio amplifier quality. (For a good technical analysis of distortion and the sound of an amplifier, see Lynn Olson's excellent investigation. [nutshellhifi.com]

By the way, in the 'tubes vs transistors' debate, good triodes have the advantage of being more intrinsically linear than transistors. This means that they require less negative feedback to tame their distortion, and often sound wonderful with NO negative feedback. The THD figures of amps built this way are often quite poor, but look at their spectra and you'll see predominantly second- and third-order, with a smooth and rapid falloff of higher order harmonics. Occasionally solid-state amps can give this kind of performance, but tubes have an easier time of it. Designing a good-sounding, (as opposed to good-measuring), audio amp, requires a lot of skill, and a lot of knowledge about distortion mechanisms and how to counter them. Unfortunately the prevailing practice in HiFi is to add more gain, throw most of it away with additional NFB, get a nice low THD figure, and call the job done. Amps designed this way generally sound like shit, if not initially, then after 20 minutes or so of listening, at which time listening fatigue sets in.

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Tuesday, May 8, 2012

How Much MacBook Air Can You Get For $800?

In order to compete with PC manufacturers selling inexpensive Windows ultrabooks, Apple is primed to release a lower-priced, $800 MacBook Air in Q3 -- immediately begging the question, What will you actually get for your low cost of entry?

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Monday, May 7, 2012

Live from CTIA in New Orleans!

Android Central at CTIA

It's about that time, ladies and gentlemen. We're in New Orleans for the spring CTIA event. In addition to working alongside the Mighty Mississippi all week -- and eating beignets ... and po boys ... and having a hurricane or two to wash it all down while listening to some street music -- we'll be bringing you the latest from the world of mobile devices, policies and anything else with an on/off switch.

This page is your portal to the whole thing, so bookmark it now. We'll have updates from the show, from the streets and wherever else we can find it. Laissez les bons temps rouler!

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Rubio Dodges Veep Talk (TIME)

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