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Japan

Ask Slashdot: Radiation Detection For Tokyo Resident? 371

An anonymous reader writes "I'm an American who is living in Tokyo. Stories have started popping up about 'radiation hot spots' in Tokyo and surrounding prefectures so I have begun to worry. I live on the first floor of my apartment building and right by our washing machine there is a gutter out there that is clogged with rain water and mud, which has me especially worried because my wife and I are planning to have kids soon. Obviously no one from the government is going to come by to check our gutter so I feel the need to take matters into my own hands. I have absolutely no idea so I'm asking you guys. What kind of radiation detector should I get? A Geiger Counter? If it measures Gamma rays is that enough? Are alpha and beta dangerous too? I know no one has all the answers regarding radiation but any advice you guys could give me would be great."
Space

SpaceX Reveals Plans For Full Launch System Re-usability 227

FleaPlus writes "During a talk at the National Press Club, SpaceX's Elon Musk revealed the company's plans for making their Falcon 9 rocket fully reusable. A rendering depicts the first stage, upper stage, and Dragon capsule all separately returning to the Earth's surface and making a controlled, rocket-powered landing. During the next few years SpaceX will be testing VTVL (Vertical Takeoff, Vertical Landing) maneuvers and re-usability with their Falcon 9-based 'Grasshopper' testbed, with up to 70 test launches per year. Musk stated that if reuse is successful, it would result in a 100x reduction in their already-low launch costs, a key step toward Musk's long-term aim of lowering the price of a ticket to Mars to $500K."

Comment Re:Either way, its the end of T-Mobile (Score 1) 325

Coverage in the US: Verizon > Sprint >>> AT&T > T-Mobile — US Cellular is up there in some areas of the country (e.g. WA, OR). Compared to VZW, Sprint may not be so hot, but it has somewhat more coverage than AT&T.

Also, by "somewhat more coverage" I'm taking AT&T's zoomed-out coverage map as gospel. In particular, I'm counting GSM as if it's real coverage. Considering UMTS only, which makes sense because a) GPRS blows goats and b) their marketing heavily emphasizes activities that require UMTS or HSPA, AT&T's coverage wouldn't suffice as a dancer's outfit in a titty bar.

Networking

NRO Warns They Are On Final IPv4 Address Blocks 282

eldavojohn writes "According to the Number Resources Organization, they will have issued their final twelve IPv4 blocks in a few months. Each block is 16 million addresses and represents 1/256th of the total addresses issued. We are now down to 12 blocks left in the global pool for issuing to Regional Internet Registries, who will then assign the last addresses that will run out sometime later in 2011. The pool of free addresses works out to be less than half of where we were in January. The new numbers from the NRO indicate estimated global pool IP address exhaustion in a few months, a year earlier than they estimated at the beginning of 2010."

Comment Re:End mail delivery on Monday, Wednesday, or Frid (Score 1) 504

My local post office (Yakima, WA) is only open Monday through Friday, 0800-1730. Where US post offices are open on Saturday, they're almost never open late enough that you can actually pick up a package on Saturday after an attempted delivery on the same day. I'd go for weekday delivery only in exchange for the post offices being open a minimum of twelve hours a day, seven days a week.

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