<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 14pt; color: rgb(0, 0, 0);" class="elementToProof">
Can this model be used on a 3D printer?</div>
<div class="elementToProof">
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 14pt; color: rgb(0, 0, 0);">
<br>
</div>
<div id="Signature">
<div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 14pt; color: rgb(0, 0, 0);">
<br>
</div>
<div></div>
<div></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:11pt">Jean M. Self-Trail, Ph.D.</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:11pt">U.S. Geological Survey</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:11pt">926A National Center</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:11pt">12201 Sunrise Valley Dr.</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:11pt">Reston, VA 20192</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:11pt">703-648-6013</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:11pt"><br>
</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:11pt">"The ceremony of innocence is drowned;</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:11pt">The best lack all conviction, while the worst</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:11pt">Are full of passionate intensity" --William Butler Yeats</span><br>
</div>
</div>
</div>
</div>
<div id="appendonsend"></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Coccoliths <coccoliths-bounces@fcnym.unlp.edu.ar> on behalf of Young, Jeremy <jeremy.young@ucl.ac.uk><br>
<b>Sent:</b> Thursday, October 12, 2023 5:16 PM<br>
<b>To:</b> Coccoliths@fcnym.unlp.edu.ar <coccoliths@fcnym.unlp.edu.ar><br>
<b>Subject:</b> [EXTERNAL] Re: [coccoliths] morphometrics for 3D printing</font>
<div> </div>
</div>
<div style="line-break:after-white-space">
<p> </p>
<div>
<table border="2" cellspacing="4" cellpadding="0" style="border-color:black; background-color:yellow; margin-left:auto; margin-right:auto">
<tbody>
<tr>
<td>
<p style="text-align:center"><strong> This email has been received from outside of DOI - Use caution before clicking on links, opening attachments, or responding. </strong></p>
</td>
</tr>
</tbody>
</table>
</div>
<p><br>
<br>
</p>
<div>Hi Fab
<div><br>
</div>
<div>Nice model! I'm not too sure you will find much of that sort of data but:</div>
<div><br>
</div>
<div>1. Braaudosphaera can be modelled entirely mathematically so could be a nice place to start.</div>
<div><br>
</div>
<div>2. In the particular case of the C. lept distal shield the faces are all rhombohedral calcite a faces so you can derive most of the angles simply from that - but maybe that is what you have done already? Two references for this are Young et al 2004 and
Avrahami et al 2022</div>
<div><br>
</div>
<div>3. In a way what you are doing is similar to what I did ages ago in 2-D - see Young 1989. If the CAD program is able to eliminate the parts of two solids which overlap then I guess you mostly need to define the leading edge of each element and the profile
across the coccolith </div>
<div><br>
</div>
<div>Jeremy</div>
<div><br>
</div>
<div><span style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px; background-color:rgb(255,255,255)">Avrahami, E. M., Houben, L., Aram, L. & Gal, A. (2022). Complex morphologies of biogenic crystals emerge from anisotropic
growth of symmetry-related facets. </span><i style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px">Science. </i><span style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px; background-color:rgb(255,255,255)"></span><b style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px">376</b><span style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px; background-color:rgb(255,255,255)">:
312-316.</span></div>
<div>
<div style="text-indent:-40.799999px"><span style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px; background-color:rgb(255,255,255)"> <span class="x_Apple-tab-span" style="white-space:pre">
</span> Young, J. R., Henriksen, K. & Probert, I. (2004). Structure and morphogenesis of the coccoliths of the CODENET species. </span><i style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px">In</i><span style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px; background-color:rgb(255,255,255)">,
Thierstein, H. R. & Young, J. R. (eds) </span><i style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px">Coccolithophores - From molecular processes to global impact. </i><span style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px; background-color:rgb(255,255,255)">Springer,
Berlin 191-216.</span></div>
<div style="text-indent:-40.799999px"><span style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px; background-color:rgb(255,255,255)">Y Young, J. R. (1989). Observations on heterococcolith rim structure and its relationship
to developmental processes. </span><i style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px">In</i><span style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px; background-color:rgb(255,255,255)">,
Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. </span><i style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px">British Micropalaeontological Society
Publication Series </i><span style="font-family:Geneva,Tahoma,sans-serif; font-size:10.2px; text-indent:-40.799999px; background-color:rgb(255,255,255)">. 1-20.</span></div>
<div><br>
<blockquote type="cite">
<div>On 12 Oct 2023, at 16:39, Fabrice MINOLETTI <fabrice.minoletti@sorbonne-universite.fr> wrote:</div>
<br class="x_Apple-interchange-newline">
<div>
<div>
<div style="background-color:#FFEFD5; padding:1px">
<p style="font-size:11pt; line-height:10pt; font-family:'Arial','Helvetica',sans-serif">
⚠ Caution: External sender</p>
</div>
<br>
<div>
<div style="font-family:arial,helvetica,sans-serif; font-size:12pt">
<div>
<div>Dear all,<br>
<br>
I'm working with (geo)student of the FabLab here in Paris.<br>
Their objective is to construct 3D models of coccoliths for teaching purpose.<br>
These models are made with OpenSCad and use simple volumes (squares, cylinders, polygons) and simple operations (rotation, translation, ecc).<br>
The downside of this approach is that we need quantified morphological parameters as dimensions and angles of the crystal elements.<br>
Attached are some images of a preliminary test on C.leptoporus to validate the approach. Coccolith interlock quite well to form a full coccosphere.<br>
<br>
Does anyone know were we can find such morphological data?<br>
For example: angle of kinks, angle between distal shield elements and the plane of coccolith, space between proximal and distal shield, width of tube elements, ecc, ecc<br>
<br>
Do such data even exist?<br>
<br>
Thank you in advance for any help!<br>
<br>
All the Best,<br>
Fabrice.</div>
<div><br>
</div>
<div><br>
- - - - - - - - - - - - - - - - - -<br>
Fabrice MINOLETTI, PhD<br>
Maître de Conférences HDR – Sorbonne Université<br>
Institut des Sciences de la Terre de Paris (ISTeP - UMR 7193)<br>
Campus Pierre et Marie CURIE, Paris, France</div>
</div>
<div><br>
</div>
<div data-marker="__SIG_PRE__"><br>
- - - - - - - - - - - - - - - - - -<br>
Fabrice MINOLETTI, PhD<br>
Maître de Conférences HDR – Sorbonne Université<br>
Directeur Master STePE Portail SDUEE<br>
Co-responsable Parcours-type Géosciences et Planétologie (GEO-P)<br>
Institut des Sciences de la Terre de Paris (ISTeP - UMR 7193)<br>
Equipe Terre/Mer: Structure et Archive<br>
Campus Pierre et Marie CURIE<br>
T56-55 5eme - Case 116 - 4, Place Jussieu 75252 Paris cedex 05<br>
Tel: +33 (0)1 44 27 27 60<br>
Site Web http://www.istep.upmc.fr<br>
</div>
</div>
</div>
</div>
<span id="x_cid:F0BB2192-7C75-48E2-948E-20C71CAC9C32"><Clept.png></span><span id="x_cid:7EDDEA3C-F844-4305-84D3-8BE864143A17"><Clept1.png></span><span id="x_cid:DFBD7794-CF5C-49D6-B25C-D50BF0D67827"><Clept2.png></span>_______________________________________________<br>
Coccoliths mailing list<br>
Coccoliths@fcnym.unlp.edu.ar<br>
https://webmail.fcnym.unlp.edu.ar/mailman/listinfo/coccoliths<br>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>
</body>
</html>