synthetic black holes
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So yesterday I'm reading about solar energy and thinking -- blah, blah, blah -- of all the known solutions.
Today Slashdot gives me a blurb about synthetic black holes, which I follow to new scientist and on to http://arxiv.org/abs/0910.2159v1
The abstract: Traditionally, a black hole is a region of space with huge gravitational field in the means of general relativity, which absorbs everything hitting it including
the light. In general relativity, the presence of matter-energy densities results in the motion of matter propagating in a curved spacetime1 , which is similar to the electromagnetic-wave propagation in a curved space and in an inhomogeneous
metamaterial2 . Hence one can simulate the black hole using electromagnetic fields and metamaterials. In a recent theoretical work, an optical black hole has been proposed based on metamaterials, in which the numerical simulations
showed a highly efficient light absorption3 . Here we report the first experimen- tal demonstration of electromagnetic black hole in the microwave frequencies. The proposed black hole is composed of non-resonant and resonant metamaterial
structures, which can absorb electromagnetic waves efficiently coming from all directions due to the local control of electromagnetic fields. Hence the electro- magnetic black hole could be used as the thermal emitting source and to harvest
the solar light. The actual synthetic black hole is, for microwaves, simply a radially symmetric pattern of glyphs on a printed circuit board. -- rec -- ============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org |
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Fairly far out there. Here's one I stumbled across yesterday that is way far out there:
The Collider, the Particle and a Theory About Fatehttp://www.nytimes.com/2009/10/13/science/space/13lhc.html?pagewanted=1&_r=1 On Thu, Oct 15, 2009 at 9:34 AM, Roger Critchlow <[hidden email]> wrote: So yesterday I'm reading about solar energy and thinking -- blah, blah, blah -- of all the known solutions. -- Doug Roberts [hidden email] [hidden email] 505-455-7333 - Office 505-670-8195 - Cell ============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org |
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So how do you test a hypothesis that the future is interfering with the present?
-- rec -- On Thu, Oct 15, 2009 at 10:21 AM, Douglas Roberts <[hidden email]> wrote: Fairly far out there. Here's one I stumbled across yesterday that is way far out there: ============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org |
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You wait until you get to the future to see if your hypothesis was correct. If it wasn't, you go back and change it. It can be an iterative process before you get a positive result.
--Doug
On Thu, Oct 15, 2009 at 10:35 AM, Roger Critchlow <[hidden email]> wrote: So how do you test a hypothesis that the future is interfering with the present? ============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org |
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You wait until you get to the future to see if your hypothesis was correct. If it wasn't, you go back and change it. It can be an iterative process before you get a positive result.Every time I try that I get *really* confused. Even my lab notes seem to get all jumbled up and self-contradictory. Since I've been re-reading Hitchhiker's Guide to the Galaxy, I think I have been a bit influenced by Zaphod Beeblebrox's approach to things. I suppose he would suggest something like: "You just have to avoid looking directly into the future as you try to change it, lest it get all skittish and refuse to cooperate." Carry On, - Steve
============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org |
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