fysdt writes "There has obviously been a lot of discussion about last week's disclosure that iOS devices are maintaining an easily-accessible database tracking the movements of users dating back to the introduction of iOS 4 a year ago. The issue has garnered the attention of US elected officials and has played fairly heavily in the mainstream press. One MacRumors reader emailed Apple CEO Steve Jobs asking for clarification on the issue while hinting about a switch to Android if adequate explanations are not forthcoming. Jobs reportedly responded, turning the tables by claiming both that Apple does not track users and that Android does, while referring to the information about iOS shared in the media as 'false.'" Apple has now been hit with a class-action lawsuit over the location-tracking issue.

Pickens writes "BBC reports that researchers have created software that gives images an expiration date by tagging them with an encrypted key so that once this date has passed the key stops the images being viewed and copied. Professor Michael Backes, who led development of the X-Pire system, says development work began about 18 months ago as potentially risky patterns of activity on social networks, such as Facebook, showed a pressing need for such a system. 'More and more people are publishing private data to the internet and it's clear that some things can go wrong if it stays there too long,' says Backes. The X-Pire software creates encrypted copies of images and asks those uploading them to give each one an expiration date. Viewing these images requires the free X-Pire browser add-on. When the viewer encounters an encrypted image it sends off a request for a key to unlock it. This key will only be sent, and the image become viewable, if the expiration date has not been passed."

aztec1430 writes "Airplane!, The Empire Strikes Back, The Exorcist, and All the President's Men, were among the 25 films named by the Library of Congress to the National Film Registry on Tuesday for their cultural, historical or aesthetic significance. Now, which version was added? And will each new Lucas-a-fied version need to be resubmitted every year? ;)"

Hugh Pickens writes "A shipment of radioactive rods used in medical equipment has vanished while being sent by FedEx from North Dakota to Tennessee. Based on tracking information, FedEx is focusing its search in the Tennessee area, but as a normal precaution the company alerted all of its stations 'in the event that it got waylaid and went to another station by accident.' Dr. Marc Siegel says if someone opens the container it could pose some serious health risks. 'I don't believe it has the degree of radiation that, if it were opened, your skin would suddenly slough off. But the concern would be, if this got opened inadvertently and someone didn't know what it was and then was repeatedly exposed to it over several days, it could cause a problem with radiation poisoning,' says Siegel. 'The people that use this equipment in a hospital use protective shielding with it.' The lesson is that active medical material must always be transported in a way that ensures the general public cannot get access to it. 'Medical devices should not be FedExed. They should be sent under a special service,' adds Siegel."

St. Vincent Euphrasia elementary school in Meaford, Ont. is the latest Canadian school to decide to save its students from the harmful effects of Wi-Fi by banning it. Schools from universities on down have a history of banning Wi-Fi in Ontario. As usual, health officials and know-it-all scientists have called the move ridiculous. Health Canada has released a statement saying, "Wi-Fi is the second most prevalent form of wireless technology next to cell phones. It is widely used across Canada in schools, offices, coffee shops, personal dwellings, as well as countless other locations. Health Canada continues to reassure Canadians that the radiofrequency energy emitted from Wi-Fi equipment is extremely low and is not associated with any health problems."

An anonymous reader writes "The has been a lot of buzz in the industry lately about NoSQL databases helping Twitter, Amazon, and Digg scale their transactional workloads. But there has been some recent pushback from database luminaries such as Michael Stonebraker. Now, a couple of researchers at Yale University claim that NoSQL is no longer necessary now that they have scaled traditional ACID compliant database systems."

theodp writes "At some schools, a teaching load of five courses every academic year is considered excessive. But Sal Khan, as an earlier Slashdot post noted, manages to deliver his mini-lectures an average of 70,000 times a day. BusinessWeek reports that Khan Academy has a new fan in Bill Gates, who's been singing and tweeting the praises of the free-as-in-beer website. 'This guy is amazing,' Gates wrote. 'It is awesome how much he has done with very little in the way of resources.' Gates and his 11-year-old son have been soaking up videos, from algebra to biology. And at the Aspen Ideas Festival in front of 2,000 people, Gates gave Khan a shout-out, touting the 'unbelievable' Khan Academy tutorials that 'I've been using with my kids.'"