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Smart search engines for news videos

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NewsHistory makes the most of user knowledge, searching through video databases to find video sequences with identical content. (Credit: © Fraunhofer IDMT)

Jan. 7, 2013 — Searching for video recordings regularly pushes search engines to their limit. The truth of the matter is that purely automatic algorithms are not enough; user knowledge has to be harnessed, too. Now, researchers are making automated engines smarter.

Anyone who has visited one of the big online video portals or TV broadcasters’ media libraries to search for a video clip is already familiar with the search engines tasked with seeking out and flagging video footage. However, these engines have their weaknesses. Their results are...

Computer scientists find vulnerabilities in Cisco VoIP phones

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Cui designed the device above to plug into a Cisco phone and download malware. (Credit: Image courtesy of Columbia University Fu Foundation School of Engineering and Applied Science)

Jan. 4, 2013 — Columbia Engineering's Computer Science PhD candidate Ang Cui and Computer Science Professor Salvatore Stolfo have found serious vulnerabilities in Cisco VoIP (voice over internet protocol) telephones, devices used around the world by a broad range of networked...

Turning smartphones into secure and versatile keys

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Thanks to ShareKey, digital keys can be transferred by e-mail using a smartphone. (Credit: © Fraunhofer SIT)

Jan. 3, 2013 — It's already possible to open doors using an app -- but we are a long way from seeing widespread acceptance of this in the market. Now, researchers have developed a piece of software that will make the technology even more secure and versatile.

Smartphones and tablets have become an integral part of our daily lives. The...

How computers push on the molecules they simulate

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Dynamic computer simulations of molecular systems depend on finite time steps, but these introduce apparent extra work that pushes the molecules around. Using models of water molecules in a box, researchers have learned to separate this shadow work from the protocol work explicitly modeled in the simulations. (Credit: Image courtesy of DOE/Lawrence Berkeley National Laboratory)

Jan. 3, 2013 — Because modern computers have to depict the real world with digital...

Toward reducing the greenhouse gas emissions of the Internet and telecommunications

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Jan. 2, 2013 — Amid growing concern over the surprisingly large amount of greenhouse gas produced by the Internet and other telecommunications activities, researchers are reporting new models of emissions and energy consumption that could help reduce their carbon footprint.

Their report appears in ACS' journal Environmental Science & Technology.

Researchers from the Centre for Energy-Efficient Telecommunications (CEET) and Bell Labs explain that the information...