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Slashback: Unenforceability, Conflagration, Cans
a filtration system for your 2.4 goldfish Jay Beale points to this followup to his "Why iptables rocks" article of a few weeks ago: "It fulfills my promise to show how to actually build a home/SOHO firewall with Linux 2.4's iptables aka Netfilter. It contains the full code, explained piece by piece, to build a working firewall with 2.4, including all kinds of cool packet mangling for load balancing, redirecting stuff to transparent proxies, or avoiding nmap stealth scans ..."
Out of embarrassment, perhaps? An unnamed correspondent points out this bit of news regarding Symantec's patent on software updates. The upshot is, without pointing out that updating software incrementally is not a patent likely to win them a lot of favor from the industry they have simply decided not to enforce it. Smart move.
Not yet in the can, or the cube either Casey Ho of San Jose's Leland High wrote with some interesting information for those interested in tiny amateur satellites; Leland is one of the handful of schools whose students are designing experimental payloads for inclusion on an upcoming launch.
[We] are focusing on making a CubeSat. Leland High school officially has one satellite to launch, and there are four teams now competing to make a design that will be approved by CalPoly technicians. My own group will attempt to broadcast a powerful long term signal using only a small satellite. The project is not easy since there are a lot of scientific guidelines we must meet. We are discussing how to create a reliable circuit and transmitter that will function in extreme temperatures, vacuum, radiation, and most importantly, after an extra powerful rocket launch. The requirements are available here.Machinima makes the grade ILL Robinson writes: "Wanted you guys to know that our Quake II-based machinima film, Hardly Workin', received top honors at Showtime Networks' Alternative Media Festival - alt.sho.com. In an awards ceremony on February 8th at MTV Studios, Showtime awarded The ILL Clan with awards in both Best Experimental Short as well as Best of SHO for the festival. Using Machinima (films created with a PC game that can be modified with users' assets), The ILL Clan's film gained notice from the festival's judges - citing Hardly Workin' as a short with a high degree of innovation, design & creativity. We're pretty excited to receive the recognition, all the way from fans of ours who had been following us from the beginning and now, from a top-tier cable TV network. Cruise on over to our site for the official announcement, or to Machinima.com for more machinima works. And thanks also to the Slashdot readers, as they helped spread the word of what Machinima is all about."For some of you posters out there, sorry, no living organisms or explosives are allowed on the satellites. ;)"
Congatulations!
it scares me that they need to explicitly say 'no explosives', like there are a bunch of kids who wanted to sent TNT into space.
Along those lines, I've got a (formerly) solar calculator that has been running for over ten years continuously. Unless it breaks, I fully expect that it will continue to work long after I'm dead.
I painted its solar cell with the radium-based luminous paint that was used on clock and watch faces before it was discovered to be dangerous. It seems that the beta particles and low-energy gamma rays very well "illuminate" the solar cell.
You could easily power a D-I-Y microsatellite in this way, without having to have to engineer systems to deploy solar cells once in orbit.
Is that worse than the explosives?
Instead of using mechanical systems, motors or even explosives (ie. NASA loves exploding bolts - seriously) to deploy fragile solar cells by remote control, in orbit, all you'd need to do is make a nice little bundle of solar cells, coated in this paint, and packaged tightly to prevent damage. All of a sudden, for low-power satellites, you've got a viable power source.
I'm sure Cassini's controversial nuclear power source was a lot more refined, but it doesn't need to be complicated to work well.
As for the radium paint, look around antique shops, volunteer in the workshop of an aviation museum, etc. Old bottles of the paint occasionally turn up - just don't put them in your pockets, and make sure you've washed your hands after using them, and don't scrape the dried-on paint, because the dust is bad. Treat it like a lead-based paint, and you'll be quite safe.
Fire and Meat. Yummy.
Then I sit back and laugh while NORAD tries to track them boogers.
"A microprocessor... is a terrible thing to waste." --
"A microprocessor... is a terrible thing to waste." --
GeneralEmergency