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Submission + - Digirati Wisdom To Help Save the Postal Service (

An anonymous reader writes: Washington Post: Some of the folks responsible for developing and promoting e-mail, e-commerce and social media are banding together in an attempt to save the U.S. Postal Service, the institution arguably most threatened by the technological developments of the past few years. As mail volume continues to plummet and more Americans use the Internet to pay bills and keep in touch, Google executives, social media experts and some of the most passionate tech evangelists are planning to meet in Crystal City in mid-June to sort out how to save and remake the nation's mail delivery service. The conference, PostalVision 2020, is designed to bring together the people who understand what this technology has done, is doing and will do to digital commerce and communication in America. The conference is scheduled to hear from Vint Cerf, Google's chief internet evangelist, and Jeff Jarvis, who writes the popular blog and is an associate professor and director of the interactive journalism program at the City University of New York Graduate School of Journalism. He has written and blogged several times about whether or not the nation still needs a national mail delivery service.

Submission + - One-Way Sound Walls Proven Possible (

disco_tracy writes: Imagine a room where a band is playing. Neighbors can't hear the music, but if someone outside the room is talking, the musicians can hear it. The concept — a kind of one-way mirror for sound — seems imaginary, but two Italian scientists recently pushed this kind of sound manipulating technology closer to reality.

Passage of Time Solves PS3 Glitch 147

An anonymous reader writes "A quick update on the widespread PlayStation 3 glitch we discussed recently: as of last night (Monday, March 1st) the problem has resolved itself. I powered up my PS3 to find the clock was set to April 29th, 2020, but once I went into the system menu and set the date and time via the internet I got an accurate date. That seems to be the test of whether your PS3 is 'fixed' or not; Sony says you should be all set."

Finding the First Trillion Congruent Numbers 94

eldavojohn writes "First stated by al-Karaji about a thousand years ago, the congruent number problem is simplified to finding positive whole numbers that are the area of a right triangle with rational number sides. Today, discovering these congruent numbers is limited only by the size of a computer's hard drive. An international team of mathematicians recently decided to push the limits on finding congruent numbers and came up with the first trillion. Their two approaches are outlined in detail, with pseudo-code, in their paper (PDF) as well as details on their hardware. For those of you familiar with this sort of work, the article provides links to solving this problem — from multiplying very large numbers to identifying square-free congruent numbers."

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