Light shining through walls
نویسندگان
چکیده
منابع مشابه
No light shining through a wall
We are the first to present here the results of a pulsed ”light shining through a wall” experiment, specifically designed to test the PVLAS claims. Our pulsed approach allows us to measure very small conversion rates free from the inevitable false counts of photon detectors. We have not detected any regenerated photons, testing conversion and back conversion on a total of more than 4× 10 incide...
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It may be in vogue as a car colour, but for millenia insects, birds and fishes have evolved the metallic look. Many insects, birds and fish display vivid metallic colours. But such a show is not the result of pigments, but the structured reflections of light hitting the surface of the organism. Although such reflections are widespread in contemporary species, no one has discovered evidence of s...
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O ptogenetics is relatively new and has attracted much interest since the first publications from the field in the early 2000s. Both researchers and the media are fascinated by the notions it conjures of bionic implants. Notwithstanding potential applications, the technology has quickly become an important research tool in neuroscience with potential for developing a range of novel therapeutic ...
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On 22--23 June 2001, the Johns Hopkins Center for Civilian Biodefense Strategies, in collaboration with the Center for Strategic and International Studies, the Analytic Services Institute for Homeland Security, and the Oklahoma National Memorial Institute for the Prevention of Terrorism, held a senior-level exercise entitled "Dark Winter" that simulated a covert smallpox attack on the United St...
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In this report, we explore the degree to which commercial strategies, peering disputes, network failures, misconfiguration, and occasionally, malicious intent, lead to a partitioning of Internet topology. Specifically, we present a three-year study of the one-sided differences in Internet provider reachability. We focus on “dark address space”, or the range of topology accessible from one provi...
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ژورنال
عنوان ژورنال: Contemporary Physics
سال: 2011
ISSN: 0010-7514,1366-5812
DOI: 10.1080/00107514.2011.563516