<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Moises and FIS colleagues. The gravity wave that was detected last Sept informed us of the event of two black holes colliding 1.3 billion years ago - we learned how much energy was released which was approximately the 3 times the mass of the sum times c squared. We also learned that the event was very short but that the power (Energy/time) of the event was 50 times the power of all the star in the universe. Gravity waves can only provide info for large accelerations of mass because the gravitational force is so weak. So it can not be used to send info from Earth based agents to each other. My advice is stick to E&M radiation. :-) Bob<br class=""><div class="">
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-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><div class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><div class=""><span class="Apple-style-span" style="font-size: 12px; ">______________________</span></div></div></div></span></span></span></span></span></span></div></span></div></span></div></span></div></span></div></span></div></span></div></span></div></span></div></span><span class="Apple-style-span" style="font-size: 12px; "><div class=""><span class="Apple-style-span" style="font-size: 12px; "><br class=""></span></div>Robert K. Logan</span><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><span class="Apple-style-span" style="orphans: 2; text-align: -webkit-auto; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: 12px; ">Prof. Emeritus - Physics - U. of Toronto </span><div class=""><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "></span><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: 12px; ">Fellow University of St. Michael's College</span></div><div class=""><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: 12px; ">Chief Scientist - sLab at OCAD</span><span class="Apple-style-span" style="orphans: 2; text-align: -webkit-auto; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><span class="Apple-style-span" style="orphans: 2; text-align: -webkit-auto; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: 12px; "><a href="http://utoronto.academia.edu/RobertKLogan" class="">http://utoronto.academia.edu/RobertKLogan</a></span><div style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; " class=""><span class="Apple-style-span" style="font-size: 12px; "><a href="http://www.physics.utoronto.ca/Members/logan" class="">www.physics.utoronto.ca/Members/logan</a></span></div><div class=""><span class="Apple-style-span" style="font-size: 12px; "><a href="http://www.researchgate.net/profile/Robert_Logan5/publications" class="">www.researchgate.net/profile/Robert_Logan5/publications</a></span><br class=""><div style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div></div></span><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"></div></div></span><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline">
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<br class=""><div><blockquote type="cite" class=""><div class="">On Feb 12, 2016, at 6:34 PM, Moisés André Nisenbaum <<a href="mailto:moises.nisenbaum@ifrj.edu.br" class="">moises.nisenbaum@ifrj.edu.br</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class=""><div class="">Dear FISers.</div><div class=""><br class=""></div><div class="">Yesterday LIGO ( Laser Interferometer Gravitational-Wave Observatory) announced, for the first time, the detection of Gravitational Waves predicted by Einstein 100 years ago.</div><div class="">Wouldn't be Gravitational Waves a good discussion in FIS?</div><div class="">We all know that regular waves can carry information. Can gravitational waves carry information? Which kind?</div><div class="">Panelists (I saw some videos) say that "gravitational waves carry information about astronomical phenomena never before observed by human".</div><div class="">The question is: is it possible to "modulate" some information in gravitational waves?</div><div class="">I found at Scopus 17 articles containing "information" and "gravitational waves" in title, so I think that people are working around this...</div><div class="">I think that it is a very important moment in history of science and it is extremely related with 'information'.</div><div class=""><br class=""></div><div class="">Surely we have colleagues (specialists) in FIS that can share interesting thoughts about this theme.</div><div class="">I talked with Pedro about, and he agree we may have a discussion about after two that are scheduled.</div><div class="">So, this message is not for starting a discussion. It is only to register this fabulous new way that, we have now, to 'listen' the universe.</div><div class=""><br class=""></div><div class="">Links:</div><div class=""><a href="http://www.ligo.org/news/media-advisory.php" class="">http://www.ligo.org/news/media-advisory.php</a></div><div class=""><a href="https://ligo.caltech.edu/" class="">https://ligo.caltech.edu/</a></div><div class=""><a href="https://www.advancedligo.mit.edu/" class="">https://www.advancedligo.mit.edu/</a></div><div class=""><a href="http://www.ligo.org/" class="">http://www.ligo.org/</a></div><div class=""><a href="https://www.ligo.org/partners.php" class="">https://www.ligo.org/partners.php</a></div><div class=""><br class=""></div><div class="">Um abraço!</div><div class="">Moisés</div><div class=""><br class=""></div>-- <br class="">Moisés André Nisenbaum<br class="">Doutorando IBICT/UFRJ. Professor. Msc.<br class="">Instituto Federal do Rio de Janeiro - IFRJ<br class="">Campus Rio de Janeiro<br class=""><a href="mailto:moises.nisenbaum@ifrj.edu.br" class="">moises.nisenbaum@ifrj.edu.br</a></div></div>
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