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In this issue:
Sight Unseen
Colloquium Today: eScience and Semantic Computing
New Online Physics Photo Gallery

SLAC Today

Monday - March 24, 2008

Stanford graduate student Jason Hogan and SLAC's Surjeet Rajendran (center) and Peter Graham (right) discuss an experiment that may have vast scientific implications.

Sight Unseen

Despite decades of attempts, gravitational waves continue to elude direct detection. However, one new technology could soon change that. SLAC theorists are watching closely as their experimentalist colleagues at Stanford make ready a device that will scrutinize Einstein's century-old equivalence principle, which says objects with different mass and compositions accelerate at the same speed under gravity.

The precision of the Stanford experiment will be the highest ever achieved for a test of the equivalence principle. While the Stanford researchers' immediate goal is to examine this principle, the experiment will also demonstrate technology proposed for use in the search for gravitational waves.

"Directly observing gravitational waves would revolutionize astrophysics," said SLAC graduate student Surjeet Rajendran. "They could offer a snapshot of the big bang, as well as other early universe processes." Read more...

Colloquium Monday

eScience and
Semantic Computing

In the future, frontier research in many fields will increasingly require the collaboration of globally distributed groups of researchers needing access to distributed computing, data resources and support for remote access to expensive, multi-national specialized facilities such as telescopes and accelerators or specialist data archives. In this afternoon's colloquium, Microsoft's Tony Hey will discuss how future computing innovation might be provided by multi-disciplinary and collaborative research—from bio-informatics and earth systems science to social science and archaeology.

Hey's talk will review the elements of this vision and explain the need for semantic-oriented computing by exploring projects that have successfully applied relevant technologies.

The colloquium takes place today at 4:15 p.m. in Panofsky Auditorium. All are invited to attend. Learn more...

New Online Physics Photo Gallery

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A new online photo gallery has been unveiled at the Emilio Segrè Visual Archive. The website is part of the Center for History of Physics' Niels Bohr Library at the American Institute of Physics.

The gallery includes more than 30,000 images of physicists and astronomers, as well as slides, lithographs and engravings. The gallery's core collection of photos taken by the late Segrè has been widely supplemented with images from other sources, and includes photos of SLAC and early laboratory staff.

"The Emilio Segrè Visual Archives is wonderful," SLAC Archivist Jean Deken said. "The new favorite photos gallery is a nice addition to the site, and features some of the best-loved, most-requested photos in the collection."


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