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--></style></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> John Clark <johnkclark@gmail.com> <br><br></span><o:p></o:p></p></div><div><div><div><div><div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><p class=MsoNormal><span class=gmaildefault><i><span style='font-size:13.5pt;font-family:"Arial",sans-serif'>>>… </span></i></span><span class=m56994701277361365gmaildefault><i><span style='font-size:13.5pt;font-family:"Georgia",serif'>John that analysis has assumptions you didn’t state. Using that equation assumes a thin shell or (if expressed in Dyson swarm language) a thin layer.</span></i></span><span class=gmaildefault><i><span style='font-size:13.5pt;font-family:"Georgia",serif'> </span></i></span><i><span style='font-size:13.5pt;font-family:"Georgia",serif'>But what if it isn’t that way? What if a Dyson swarm is a few light seconds thick? </span></i><o:p></o:p></p></blockquote></div></div></div></div><div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'>>…I don't see the advantage of doing that<span class=gmaildefault>, it would just make things more complicated…<o:p></o:p></span></span></b></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'>More complicated is not necessarily a disadvantage in itself. Consider machines in general, with internal combustion engines a great example that most of us know well. More complicated designs work better.<o:p></o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'>>…and require more mass…<o:p></o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'>Ja and that might be a driving factor in many stars. But what if the star is metal-rich, like ours? Does that matter still?<o:p></o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><i><span style='font-size:13.5pt;font-family:"Arial",sans-serif'> </span></i></span><span class=gmaildefault><span style='font-family:"Arial",sans-serif'> </span></span> <o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span class=gmaildefault><i><span style='font-size:13.5pt;font-family:"Arial",sans-serif'>>>… </span></i></span><span class=m56994701277361365gmaildefault><i><span style='font-size:13.5pt;font-family:"Georgia",serif'>Are you confident in using the black body thermal model for the inboard nodes?</span></i></span><o:p></o:p></p></div></div></div></div></div></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'>>…Yes a Dyson sphere or swarm<span class=gmaildefault> will radiate heat from both the inside and the outside. </span> </span></b><o:p></o:p></p></div><div><div><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span class=m56994701277361365gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'> Ja. It is important to get that. If the swarm has significant thickness, the outer layers radiate heat back down into the inner layers, which cause them to get hotter. If the swarm is thin, that doesn’t matter. But if it is thick, and the swarm absorbs a significant fraction of the star’s energy, that becomes very important. <o:p></o:p></span></b></span></p></div></div></div></div></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><div><p class=MsoNormal><span class=gmaildefault><i><span style='font-size:13.5pt;font-family:"Arial",sans-serif'>> </span></i></span><span class=m56994701277361365gmaildefault><i><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'> in order to prevent overheating your innermost nodes.</span></i></span><o:p></o:p></p></div></div></div></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'>>…I just don't see why that's gonna be a big problem.<span class=gmaildefault> </span></span></b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'>John K Clark<o:p></o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'>Robert punted on that one as well. What I would suggest is to propose a design for M-Brain nodes that we can build now. Then we can start calculating how well they will work. I proposed a design and posted photos of scale a model I built, and used as a visual aid when pitching the idea for an engineering group in 2009. I used a standard CD as a 12x scale model, so the node is a bit over half the size of an American dime, mass 1 milligram, diameter 10 mm. <o:p></o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'>With those numbers (as an example (feel free to choose your own)) we can do some calculations on power use, thermal characteristics etc.<o:p></o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'>spike <o:p></o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><span class=gmaildefault><b><span style='font-size:13.5pt;font-family:"Tahoma",sans-serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div></body></html>