The Japanese news site Daily Yomiuri is reporting that a woman was murdered in a robbery concocted with the aid of dark Web sites set up to help criminals find accomplices.
Kenji Kawagishi, and unemployed 40 year-old man in Aichi Prefecture,
sent messages from his cell phone to the "Dark Employment Security
Web," which hooked him up with two other men who were also hard-up for
cash. Tsukasa Kanda, a 36 year-old sales agent for the Japanese
newspaper Asahi Shimbun,
and Yoshitomo Hori, an unemployed man of 32, joined with Kawagishi in
kidnapping Rie Isogai while she was on her way home from work. The men
robbed her of 70,000 yen (about $600), murdered her and dumper her in
the woods of Mizunami, Gifu Prefecture.
The
Dark Employment Security Web has been closed, but the Japanese
authorities say there's no way to know how many more are out there.
Although the police shut them down as soon as they learn of the criminal
equivalents of MySpace, new sites replace the deleted ones almost immediately.
Thursday, April 2, 2015
Computing with Heat
Researchers in Singapore have shown, in principle at least, that it will
soon be possible to create thermal logic gates, including AND, OR, and NOT gates.
Once you have all those pieces, you've got the basic ingredients of a
computer that runs directly on heat, with no need for electricity at
all.
Lei Wang and Baowen Li of the National University of Singapore propose that their logic gates could soon be built of recently developed thermal transistors or related designs, which control heat flow in the same way that conventional transistors control electricity.
A thermal transistor turns on or off depending on whether the temperature at its input gate is above or below a critical temperature. Constant temperature heat baths would take the place of power supplies in operating the thermal transistors and logic gates. In theory, any heat source could be used to run a thermal computer - sunlight, the heat from a campfire, etc.
In addition to proving that thermal gates can perform all the basic functions of electronic gates, the authors of the research soon to be published in the journal Physical Review Letters point out that the work may also help us to understand the complex heat flow in biological cells and systems in terms of thermal logic.
To get a look at the research before it's officially published, you can download a preprint of paper from the online science archives.
Lei Wang and Baowen Li of the National University of Singapore propose that their logic gates could soon be built of recently developed thermal transistors or related designs, which control heat flow in the same way that conventional transistors control electricity.
A thermal transistor turns on or off depending on whether the temperature at its input gate is above or below a critical temperature. Constant temperature heat baths would take the place of power supplies in operating the thermal transistors and logic gates. In theory, any heat source could be used to run a thermal computer - sunlight, the heat from a campfire, etc.
In addition to proving that thermal gates can perform all the basic functions of electronic gates, the authors of the research soon to be published in the journal Physical Review Letters point out that the work may also help us to understand the complex heat flow in biological cells and systems in terms of thermal logic.
To get a look at the research before it's officially published, you can download a preprint of paper from the online science archives.
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