Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror

Comment: Confusing magnetic resonance and radiated RF power (Score 2) 215

by kidaxess (#41836993) Attached to: Wireless Power Over Distance: Just a Parlor Trick?
There seems to be some confusion on this thread between magnetic resonance, which is the type of power transfer used by WiTricity and others, and radiative RF which is the radio technology we are used to. For example, received power does not fall off with the square of distance in the case of magnetic resonant systems. There are definitely a ton of challenges to this technology, but it is good to keep in mind that they are NOT talking about transmitting a high power RF signal and having it received at range. Here is a link to a paper that describes both types of systems so you can understand the implementation and trade-offs. The author's have achieved 80% efficiency over a few meters using magnetic resonance. Experimental Results with two Wireless Power Transfer Systems http://sensor.cs.washington.edu/pubs/WISP-WARP.pdf Video and other good info: http://www.alansonsample.com/research/wrel.html
The Courts

Judge Berates Prosecutors In Xbox Modding Trial 285

Posted by Soulskill
from the your-uppance-has-come dept.
mrbongo writes with this excerpt from Wired: "Opening statements in the first-of-its-kind Xbox 360 criminal hacking trial were delayed here Wednesday after a federal judge unleashed a 30-minute tirade at prosecutors in open court, saying he had 'serious concerns about the government's case.' ... Gutierrez slammed the prosecution over everything from alleged unlawful behavior by government witnesses, to proposed jury instructions harmful to the defense. When the verbal assault finally subsided, federal prosecutors asked for a recess to determine whether they would offer the defendant a deal, dismiss or move forward with the case that was slated to become the first jury trial of its type. A jury was seated Tuesday."
GNU is Not Unix

FSF Asks Apple To Comply With the GPL For Clone of GNU Go 482

Posted by timothy
from the y'know-fellas-the-license dept.
I Don't Believe in Imaginary Property writes "The Free Software Foundation has discovered that an application currently distributed in Apple's App Store is a port of GNU Go. This makes it a GPL violation, because Apple controls distribution of all such programs through the iTunes Store Terms of Service, which is incompatible with section 6 of the GPLv2. It's an unusual enforcement action, though, because they don't want Apple to just make the app disappear, they want Apple to grant its users the full freedoms offered by the GPL. Accordingly, they haven't sued or sent any legal threats and are instead in talks with Apple about how they can offer their users the GPLed software legally, which is difficult because it's not possible to grant users all the freedoms they're entitled to and still comply with Apple's restrictive licensing terms."
Cellphones

Why Overheard Cell Phone Chats Are Annoying 344

Posted by timothy
from the they-drown-out-the-bark-of-my-gun dept.
__roo writes "American researchers think they have found the answer to the question of why overhearing cell phone chats are annoying. According to scientists at Cornell University, when only half of the conversation is overheard, it drains more attention and concentration than when overhearing two people talking. According to one researcher, 'We have less control to move away our attention from half a conversation (or halfalogue) than when listening to a dialogue. Since halfalogues really are more distracting and you can't tune them out, this could explain why people are irritated.' Their study will be published in the journal Psychological Science."
Censorship

Google Stops Ads For "Cougar" Sites 319

Posted by samzenpus
from the here's-to-you-mrs-robinson dept.
teh31337one writes "Google is refusing to advertise CougarLife, a dating site for mature women looking for younger men. However, they continue to accept sites for mature men seeking young women. According to the New York Times, CougarLife.com had been paying Google $100,000 a month since October. The Mountain View company has now cancelled the contract, saying that the dating site is 'nonfamily safe.'"

Long computations which yield zero are probably all for naught.

Working...