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Directed Energy Weapon Downs Mosquitos 428

wisebabo writes "Nathan Myhrvol demonstrated at TED a laser, built from parts scrounged from eBay, capable of shooting down not one but 50 to 100 mosquitos a second. The system is 'so precise that it can specify the species, and even the gender, of the mosquito being targeted.' Currently, for the sake of efficiency, it leaves the males alone because only females are bloodsuckers. Best of all the system could cost as little as $50. Maybe that's too expensive for use in preventing malaria in Africa but I'd buy one in a second!" We ran a story about this last year. It looks like the company has added a bit more polish, and burning mosquito footage to their marketing.
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Scientists Say a Dirty Child Is a Healthy Child 331

Researchers from the School of Medicine at the University of California have shown that the more germs a child is exposed to, the better their immune system in later life. Their study found that keeping a child's skin too clean impaired the skin's ability to heal itself. From the article: "'These germs are actually good for us,' said Professor Richard Gallo, who led the research. Common bacterial species, known as staphylococci, which can cause inflammation when under the skin, are 'good bacteria' when on the surface, where they can reduce inflammation."

Comment Re:Why is public transport still living in stone a (Score 1) 177

My point here is that I do not see a reason why public transportation systems still rely on decades-old, non-encrypted technology. With ATC, it's a trivial matter of ordering a handheld on-line that is capable of transmitting on all ATC freqs. Agencies that continue to rely on antiquated systems deserve part of the blame.

The reason aircraft communications rely on non-encrypted, AM radio is every aircraft in the world needs the ability to talk to every other aircraft and every tower in the world. The existing radio system is simple and works with radios installed in planes that have been in service for decades. It is the same with Marine radio, every craft in the world can talk with every other craft and Coast Guard station because the radio system is simple and open. Unless we stop allowing private pilots and captains, the equipment has to be available to everyone, so even if we did convince everyone in the world to switch to a new system, you would still be able to order a radio on-line that would work with the new system. Public transportation agencies, and private transportation companies, could switch to something more complex for internal use, and /\/\otorola would love it if they did, but it would be an expensive solution to a small problem. If they share infrastructure (like railroad tracks), they would also likely have to continue using and maintaining their existing equipment to communicate with other users of the infrastructure. --Rich

Comment IRC (Score 1) 360

You can set up an IRC server with Pidgin (or other) clients, then firewall access to any external servers. You then have the option of running customized bots, having common chat rooms, and person to person chats.

    We used this for internal communications in the networking group where I used to work. It had the added benefit of having a client that worked on a text Linux console in the server room. Of course the only bot we ran was one that interjected comments about local restaurants when we were deciding where to eat lunch. ;)

Comment Re:what i want to see is (Score 1) 150

Have you looked into MURS: http://en.wikipedia.org/wiki/Multi-Use_Radio_Service

It's VHF, not UHF, but you can use mobile radios, detachable antennas, gain antennas, etc. that are not allowed on FRS. You are limited to two watts out the back of the radio, with whatever antenna you want. There is lots of MURS capable equipment available surplus on eBay, etc., since the five frequencies were previously business band.

In my opinion, it's really what truckers should be using for truck to truck and truck to dock communications. Unfortunately, the industry has put a lot money and marketing into FRS/GMRS and they don't want to confuse the consumer by having MURS radios next to FRS/GMRS radios. There are very few "bubble pack" MURS radios available, and they tend to be much more expensive than FRS radios. The funny thing is there used to be "bubble pack" radios for these frequencies before they were MURS. The frequencies are the old "blue dot" and "green dot" frequencies, plus some others, that were commonly available through contractor supply stores, etc.

While I agree that UHF CB would be nice, there is already so much UHF traffic in the US that it isn't feasible. The UHF commercial band is so crowded that in many metropolitan areas, the FCC has reallocated frequencies normally used for UHF TV channel 14 for public safety use. The only reason FRS/GMRS exists is because it is limited to very low wattage. The frequencies are in between existing business band frequencies and any more power would disrupt licensed business communications on adjacent channels.

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