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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext'> extropy-chat [mailto:extropy-chat-bounces@lists.extropy.org] <b>On Behalf Of </b>Anders Sandberg…</span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>On 2016-01-25 17:55, John Clark wrote:<o:p></o:p></span></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><div><div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'><o:p></o:p></span></p></div></div><div><p class=MsoNormal><span style='font-size:13.5pt;color:#1F497D'>>>…</span><span style='font-size:13.5pt'>And if it's a Dyson Sphere it's odd we can't pick up any intelligent radio signals from it; </span><span style='font-size:13.5pt;color:#1F497D'>…</span><o:p></o:p></p></div></div></div></div></blockquote><p class=MsoNormal><br><span style='color:#1F497D'>>…</span>Even more compelling is the absence of IR emissions. If it had been a Dyson shell we should have seen a fraction of the stars luminosity reradiated in the IR spectrum. Aliens might keep silent for alien reasons, but it is hard to cheat thermodynamics. <o:p></o:p></p><pre>-- <o:p></o:p></pre><pre>Anders Sandberg<o:p></o:p></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Anders, on the contrary sir.<o:p></o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>If the notion I suggested is correct, that any MBrain would by thermodynamic necessity reflect low entropy energy in a specific direction away from us, it would appear as an anomalous lack of IR radiation. I haven’t been able to prove it, but the original notion was the discovery that an MBrain would overheat eventually, unless the most of the energy is reflected, and it has to all be in mostly one direction. <o:p></o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>I do encourage others to work out that solution independently from my calcs, or find a disproof (which would be better for MBrain fans.) The original discovery was made in late summer of 2013. <o:p></o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Recall that sequence: discovery that if you reflect most of the energy (and momentum) of a star in the same direction, you can move an entire star and its associated planets. From there I went to calculate if the nodes in the reflected light path would overheat. From there I discovered a way to turn them so they would not overheat. From there I discovered that the entire swarm would overheat eventually if we do not reflect the light in one direction, then take the action previously suggested for those nodes In the reflected light path.<o:p></o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>If an MBrain were doing that, to us it would appear as dimming with an anomalous lack of IR signature. This might be indistinguishable from an intervening dust cloud distant from the star.<o:p></o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Damn.<o:p></o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>spike<o:p></o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre><pre><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></pre></div></body></html>