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An anonymous reader writes "Peter Jansen, a PhD student and member of the RepRap community, has constructed a working prototype of an inexpensive table-top laser cutter built out of old CD/DVD drives as an offshoot of his efforts to design an under $200 open-source Selective Laser Sintering (SLS) 3D printer. Where traditional laser cutters use powerful, fixed-focus beams, this new technique dynamically adjusts the focal point of the laser using a reciprocating motion similar to a reciprocating saw, allowing a far less powerful and inexpensive laser diode to be used. The technique is currently limited to cutting black materials to a depth of only a few millimeters, but should still be useful and enabling for Makers and other crafters. The end-goal is to create a hybrid inexpensive 3D printer that can be easily reconfigured for 2D laser cutting, providing powerful making tools to the desktop."

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disco_tracy writes "Two different viruses have been used to create the cathode and anode for a lithium-ion battery. If research pans out, the parts could be grown in and harvested from tobacco plants and then woven into or sprayed onto clothing to power a wide range of electronic devices."

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Slashdot regular Bennett Haselton has written a piece on a new program called Collage that can circumvent censorship by embedding messages in user-generated content on sites like Flickr. The program demonstrates that a long-standing theoretical concept can be reduced to practice but Bennett wonders if anybody would actually need it, as long as they can exchange encrypted messages over Gmail and AIM. He begins "In a presentation delivered at USENIX, Georgia Tech grad student Sam Burnett and his colleagues described how their new program, "Collage," could circumvent Internet censorship by embedding messages in user-generated content on sites like Flickr. The short version is that a publisher uses the Collage system to break a message into pieces that are small enough to embed into a photograph using standard steganography, the photos are published according to some protocol (e.g. "all photos in the photostream of user xyz" or "all photos tagged with the 'xyz' tag"), and receivers who know the protocol for identifying the photos, can retrieve them and decode the message. According to the authors' paper, the system is general enough that it could be adapted to almost any site where user-generated content is published. (All of this can be done by hand using existing tools, but Collage automates the process to hide the individual steps from the user.)"

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An anonymous reader writes "On September first, Apple will reportedly announce a new iPod Touch with a front facing camera, a refreshed Apple TV, and more interestingly, the arrival of $0.99 TV episode rentals on iTunes."

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brumgrunt writes "Den Of Geek has the first review of James Cameron's extended cut of Avatar. Its thoughts? "As opposed to, say, the extended cuts of Aliens, Terminator 2 or The Abyss, the new scenes add little of particular note to everything we've already seen.""

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Many Catholic religious orders are participating in a long range Alzheimer's disease study. Rush University's Religious Orders Study began in 1993 and tracks the participants' mental abilities through yearly memory testing. In addition to the annual tests, the study subjects agree to donate their brains. From the article: "The researchers sought members of religious orders, hoping they would be willing to donate and would not have children or spouses interfering with that arrangement at the last minute. More than 1,100 nuns, priests and brothers across the country representing a wide range of ethnic groups are taking part."

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WHiTe VaMPiRe writes "Kyle Brandt recently wrote an editorial exploring the implications of providing developers access to the production servers of a Web site. He explores the risk introduced by providing higher level access as well as potential compromise solutions."

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angry tapir writes "US federal agents found more than US$150,000 in cash when they searched the house of Apple manager Paul Devine earlier this month, according to prosecutors. "He had over $150,000 stored in shoe boxes," Department of Justice Attorney Michelle Kane said. Devine was charged two weeks ago with taking kickbacks from Apple suppliers."

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Tootech writes "Google could be adding the ability to make phone calls from the Google Chat interface. Google is testing a Web-based service within Gmail that will allow users to place phone calls from their in-boxes. It's launched from the Google Chat window on the lower left-hand side of a Gmail page and allows users to place and receive calls from within their contacts through a user interface that strongly resembles the one used in Google Voice."

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siliconbits writes with an excerpt from NY Times: "Technology makes the tiniest windows of time entertaining, and potentially productive. But scientists point to an unanticipated side effect: when people keep their brains busy with digital input, they are forfeiting downtime that could allow them to better learn and remember information, or come up with new ideas."

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Hugh Pickens writes "In hospitals around the country, nurses connect and disconnect interchangeable clear plastic tubing sticking out of patients' bodies to deliver or extract medicine, nutrition, fluids, gases or blood — sometimes with deadly consequences. Tubes intended to inflate blood-pressure cuffs have been connected to intravenous lines leading to deadly air embolisms., intravenous fluids have been connected to tubes intended to deliver oxygen leading to suffocation, and in 2006 a nurse at in Wisconsin mistakenly put a spinal anesthetic into a vein, killing 16-year-old who was giving birth. 'Nurses should not have to work in an environment where it is even possible to make that kind of mistake,' says Nancy Pratt, a vocal advocate for changing the system. Critics say the tubing problem, which has gone on for decades, is an example of how the FDA fails to protect the public. 'FDA could fix this tubing problem tomorrow, but because the agency is so worried about making industry happy, people continue to die,' says Dr. Robert Smith." This reminds me of the sort of problem that Michael Cohen addressed in a slightly different medical context (winning a MacArthur Foundation grant) a few years ago.

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