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Supersonic shockwaves are invisible to the naked eye, but we can photograph the change in refractive index resulting from the gradient in air density. The basics of schlieren imaging techniques are over a century old, but the need for complex optics and bright light sources have mostly kept i
stanley cup ts utility in aerodynamics research contained to just scale models in wind tunnels. A supersonic jet over the Mojave Desert, processed by removing the background and combining multiple frames to capture the shockwav
stanley thermos es. Image credit: NASA But were in an era where background oriented schlieren is opening up a whole new vista of opportunity to capture real aircraft in flight. The first step of taking air-to-air schlieren images involved taking photographs from above against the speckled backdrop of the Mojave Desert. But the latest evolution of taking these images backlit by celestial objects is producing absolutely gorgeous works of scientific art. Previous ground-based schlieren systems of photographing shockwaves backlit by the sun permitted only two observations, once as the spacecraft entered the leading edge of the sun and again as it departed the trailing edge. But sunspots make the sun a naturally-speckled surface if you look in the right wavelength, and shockwaves distort those spots. By using a cal
borraccia stanley cium-K CaK optical filter, the granulated texture of the suns chromosphere is enough that engineers can capture the distorted shockwave as jets fly across the entire disc of the sun. S Gysb All This Game Boy Luggage Needs Is a Konami Code Seat Upgrade
and its potential to be exploited by criminals for money laundering and other scams. Bitcoin is unique because it is the only decentralized, P2P network-based virtual currency. The way itcreates, operates, and distributes bitcoins makes it distinctively susceptible
stanley espana to illicit moneytransfers, and manipulation through the use of malware and botnets. The anonymous transfer of virtual currency Bitcoin payment network allows means two people can complete an exchange of goods without ever having to know anything more about each other than a 36-character string of numbers and letters, a Bitcoin address or account. This means, then, that it is relatively easy to use Bitcoin anonymously for the purchase of illegal goods, like narcotics or kiddie porn, as long as a proxy is used to anonymize the IP address. To that end, Bitcoin may also prove a favorable network to terrorists, human traffickers and the like. And, of course, like so much else, it is not immune to hackers. ht
stanley quencher tp://gawker/5805928/the-underground-website-where-you-can-buy-any-drug-imaginable Curiously, further down in that same report, a bullet-point list advises how a Bitcoin criminal might best protect his or her anonymity ! Ah, well. They didn ;t anticipate the document leaking, I suppose. In any event, this is really most interes
taza stanley ting because of its potential implication in a case of self-produced and distributed kiddie-porn, should any of those stripping-for-Bitcoins babes turn out to be underage. [Wired] h
