<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Yes. Cylinders not Spheres. Once I had lathed the wax and electroplated the copper shell, I put the heat back up in my vat and the wax melted and the cylinder slid off, They then crushed my precious cylinders I had worked so hard to make.<div class=""><br class=""></div><div class="">Ed<br class=""><div class="">
<div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="orphans: 2; widows: 2;" class="">____________</div><div style="orphans: 2; widows: 2;" class=""><br class=""></div><div style="orphans: 2; widows: 2;" class=""><div class="">Ed Angel<br class=""><br class=""></div><div class="">Founding Director, Art, Research, Technology and Science Laboratory (ARTS Lab)<br class="">Professor Emeritus of Computer Science, University of New Mexico<br class=""><br class="">1017 Sierra Pinon</div><div class="">Santa Fe, NM 87501<br class="">505-984-0136 (home)<span class="Apple-tab-span" style="white-space: pre;"> </span> <span class="Apple-tab-span" style="white-space: pre;"> </span><a href="mailto:angel@cs.unm.edu" class="">angel@cs.unm.edu</a></div><div class="">505-453-4944 (cell) <span class="Apple-tab-span" style="white-space: pre;"> </span><span class="Apple-tab-span" style="white-space: pre;"> </span><a href="http://www.cs.unm.edu/~angel" class="">http://www.cs.unm.edu/~angel</a><br class=""><span class="Apple-tab-span" style="white-space: pre;"> </span> <span class="Apple-tab-span" style="white-space: pre;"> </span></div></div></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline">
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<div><br class=""><blockquote type="cite" class=""><div class="">On Feb 4, 2019, at 9:00 PM, Barry MacKichan <<a href="mailto:barry.mackichan@mackichan.com" class="">barry.mackichan@mackichan.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="plaintext" style="white-space: normal; caret-color: rgb(0, 0, 0); font-family: sans-serif; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><p dir="auto" class="">I think they were cylinders, not spheres, so there were two holes. This is where we start talking about homology groups.</p><p dir="auto" class="">--Barry</p><p dir="auto" class="">On 2 Feb 2019, at 12:56, Tom Johnson wrote:</p></div><blockquote class="embedded" style="margin: 0px 0px 5px; padding-left: 5px; border-left-width: 2px; border-left-style: solid; border-left-color: rgb(57, 131, 196); color: rgb(57, 131, 196); font-family: sans-serif; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;"><div dir="auto" class="">How did the melting wax exit the sphere? Probably a hole. So how did you patch the hole to retain perfect symmetry<div dir="auto" class="">T? </div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="">On Fri, Feb 1, 2019, 10:03 PM Edward Angel <<a href="mailto:angel@cs.unm.edu" target="_blank" rel="noreferrer" class="">angel@cs.unm.edu</a><span class="Apple-converted-space"> </span>wrote:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div style="word-wrap: break-word; line-break: after-white-space;" class="">For two summers while I was an undergrad I worked on a crack propagation project that was using high speed photography to image crack propagation on thin seamless 18” copper cylinders. During the first summer, I made the cylinders by first making solid wax molds that I lathed to the right shape. I then electroplated copper on them before melting the wax away. The second summer I worked on the photography side which was right out of Muybridge. The film was in a 6 foot in diameter ring. In the middle was a spinning prism at the end of a turbine which sent the light around the ring of film. The whole thing was triggered by the crack breaking a small wire. We all had to hide behind a barrier during each run as the whole assembly <div class="">was pretty delicately balanced.</div><div class=""><br class=""></div><div class="">Ed<br class=""><div class=""><div dir="auto" style="word-wrap: break-word; line-break: after-white-space;" class=""><div style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none;" class=""><div class="">____________</div><div class=""><br class=""></div><div class=""><div class="">Ed Angel<br class=""><br class=""></div><div class="">Founding Director, Art, Research, Technology and Science Laboratory (ARTS Lab)<br class="">Professor Emeritus of Computer Science, University of New Mexico<br class=""><br class="">1017 Sierra Pinon</div><div class="">Santa Fe, NM 87501<br class="">505-984-0136 (home)<span class="m_7722314446322226681m_6400317109174194694Apple-tab-span" style="white-space: pre-wrap;"> </span> <span class="m_7722314446322226681m_6400317109174194694Apple-tab-span" style="white-space: pre-wrap;"> </span><a href="mailto:angel@cs.unm.edu" rel="noreferrer noreferrer" target="_blank" class="">angel@cs.unm.edu</a></div><div class="">505-453-4944 (cell) <span class="m_7722314446322226681m_6400317109174194694Apple-tab-span" style="white-space: pre-wrap;"> </span><span class="m_7722314446322226681m_6400317109174194694Apple-tab-span" style="white-space: pre-wrap;"> </span><a href="http://www.cs.unm.edu/~angel" rel="noreferrer noreferrer" target="_blank" class="">http://www.cs.unm.edu/~angel</a><br class=""><span class="m_7722314446322226681m_6400317109174194694Apple-tab-span" style="white-space: pre-wrap;"> </span> <span class="m_7722314446322226681m_6400317109174194694Apple-tab-span" style="white-space: pre-wrap;"> </span></div></div></div><br class="m_7722314446322226681m_6400317109174194694Apple-interchange-newline"></div><br class="m_7722314446322226681m_6400317109174194694Apple-interchange-newline"></div><div class=""><br class=""><blockquote type="cite" class=""><div class="">On Jan 30, 2019, at 5:15 AM, Tom Johnson <<a href="mailto:tom@jtjohnson.com" rel="noreferrer noreferrer" target="_blank" class="">tom@jtjohnson.com</a>> wrote:</div><br class="m_7722314446322226681m_6400317109174194694Apple-interchange-newline"><div class=""><div dir="auto" class="">See <a href="https://www.nytimes.com/2015/11/23/science/a-side-serving-of-science-for-your-next-birthday-party.html?smid=fb-nytscience&smtyp=cur" rel="noreferrer noreferrer" target="_blank" class="">https://www.nytimes.com/2015/11/23/science/a-side-serving-of-science-for-your-next-birthday-party.html?smid=fb-nytscience&smtyp=cur</a></div>============================================================<br class="">FRIAM Applied Complexity Group listserv<br class="">Meets Fridays 9a-11:30 at cafe at St. John's College<br class="">to unsubscribe<span class="Apple-converted-space"> </span><a href="http://redfish.com/mailman/listinfo/friam_redfish.com" rel="noreferrer noreferrer" target="_blank" class="">http://redfish.com/mailman/listinfo/friam_redfish.com</a><br class="">archives back to 2003:<span class="Apple-converted-space"> </span><a href="http://friam.471366.n2.nabble.com/" rel="noreferrer noreferrer" target="_blank" class="">http://friam.471366.n2.nabble.com/</a><br class="">FRIAM-COMIC<span class="Apple-converted-space"> </span><a href="http://friam-comic.blogspot.com/" rel="noreferrer noreferrer" target="_blank" class="">http://friam-comic.blogspot.com/</a><span class="Apple-converted-space"> </span>by Dr. Strangelove<br class=""></div></blockquote></div><br class=""></div></div>============================================================<br class="">FRIAM Applied Complexity Group listserv<br class="">Meets Fridays 9a-11:30 at cafe at St. John's College<br class="">to unsubscribe<span class="Apple-converted-space"> </span><a href="http://redfish.com/mailman/listinfo/friam_redfish.com" rel="noreferrer noreferrer noreferrer" target="_blank" class="">http://redfish.com/mailman/listinfo/friam_redfish.com</a><br class="">archives back to 2003:<span class="Apple-converted-space"> </span><a href="http://friam.471366.n2.nabble.com/" rel="noreferrer noreferrer noreferrer" target="_blank" class="">http://friam.471366.n2.nabble.com/</a><br class="">FRIAM-COMIC<span class="Apple-converted-space"> </span><a href="http://friam-comic.blogspot.com/" rel="noreferrer noreferrer noreferrer" target="_blank" class="">http://friam-comic.blogspot.com/</a><span class="Apple-converted-space"> </span>by Dr. Strangelove<br class=""></blockquote></div></blockquote><div class="plaintext" style="white-space: normal; caret-color: rgb(0, 0, 0); font-family: sans-serif; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><blockquote style="margin: 0px 0px 5px; padding-left: 5px; border-left-width: 2px; border-left-style: solid; border-left-color: rgb(57, 131, 196); color: rgb(57, 131, 196);" class=""></blockquote><blockquote style="margin: 0px 0px 5px; padding-left: 5px; border-left-width: 2px; border-left-style: solid; border-left-color: rgb(57, 131, 196); color: rgb(57, 131, 196);" class=""><p dir="auto" class="">============================================================<br class="">FRIAM Applied Complexity Group listserv<br class="">Meets Fridays 9a-11:30 at cafe at St. John's College<br class="">to unsubscribe<span class="Apple-converted-space"> </span><a href="http://redfish.com/mailman/listinfo/friam_redfish.com" class="">http://redfish.com/mailman/listinfo/friam_redfish.com</a><br class="">archives back to 2003:<span class="Apple-converted-space"> </span><a href="http://friam.471366.n2.nabble.com/" class="">http://friam.471366.n2.nabble.com/</a><br class="">FRIAM-COMIC<span class="Apple-converted-space"> </span><a href="http://friam-comic.blogspot.com/" class="">http://friam-comic.blogspot.com/</a><span class="Apple-converted-space"> </span>by Dr. Strangelove</p></blockquote></div><span style="caret-color: rgb(0, 0, 0); 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