Links from 2012-02-28
IBM says it has made a significant advance towards creating mind-bendingly powerful quantum computers with it superconducting 3D qubit device. With experts hoping to construct a full working quantum computer in the next decade or so, the ability by IBM boffins to reduce errors in quantum processing and withhold information has made this even more likely. Qubits, or quantum bits, are the basic units of information used to process information in a quantum computer. Unlike ‘bits’ used in regular computers, which can switch between 0 and 1, quantum bits can be either 0 or 1. Rather more perplexingly, the weird world of quantum mechanics means that they can also be both at the same time. It is this ability to exist in multiple states that opens up potential for massively increased computing power.
Alan Turing, born a century ago this year, is best known for his wartime code-breaking and for inventing the ‘Turing machine’ – the concept at the heart of every computer today. But his legacy extends much further: he founded the field of artificial intelligence, proposed a theory of biological pattern formation and speculated about the limits of computation in physics. In this collection of features and opinion pieces, Nature celebrates the mind that, in a handful of papers over a tragically short lifetime, shaped many of the hottest fields in science today.
Sebastian Krahmer (@steaIth, c-skills) made and released a nice SSH/HTTP(S) multiplexer: sshttp. Such a program is needed when you want to share your HTTP (or HTTPS) port with SSH to be able to use SSH when behind a network that only allows outbound connections to HTTP (or HTTPS) and does not bother to do protocol inspection. Learn more by reading the readme. I was previously using sslh but sshttp has a killer feature: it uses Linux IP_TRANSPARENT feature with netfilter trickery (marking + specific routing table) to pass the original IP to destination (sshd or httpd). Since it’s a great program, not necessarily easy to set up (not yet? packaged), in this post I’m sharing my setup.
Tagged as: delicious, links | Author: Martin Leyrer
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