Electrostatics.md

+<table>
+  <tr>
+    <th colspan="2" style="text-align:center;font-weight:bold">
+Electrostatic microstrip
+    </th>
+  </tr>
+  <tr>
+    <td style="text-align:center">
+<a href="https://gitlab.onelab.info/doc/tutorials/raw/master/Electrostatic/Laplacian/screenshot1.png"><img src="https://gitlab.onelab.info/doc/tutorials/raw/master/Electrostatic/Laplacian/screenshot1_512.png" width="100%"></a>
+    </td>
+    <td style="text-align:center">
+<a href="https://gitlab.onelab.info/doc/tutorials/raw/master/Electrostatic/Laplacian/microstrip.png"><img src="https://gitlab.onelab.info/doc/tutorials/raw/master/Electrostatic/Laplacian/microstrip_512.png" width="100%"></a>
+    </td>
+  </tr>
+  <tr>
+    <th colspan="2" style="text-align:center">
+<!--
+Download <a href="http://onelab.info/files/machines.zip">model archive (machines.zip)</a><br>
+-->
+Browse <a href="https://gitlab.onelab.info/doc/tutorials/tree/master/Electrostatic/Laplacian">model files</a>
+    </th>
+  </tr>
+</table>
+
+## Quick start
+
+To run the model, open `microstrip.pro` with Gmsh
+and click on the "Run" button in the left panel. 
+
+## Features addressed in this tutorial
+
+  * Physical regions and Abstract regions
+  * Stiffness term of a Laplacian problem
+
+## Additional information
+
+This is the electrostatic 2D model of a microstrip.
+Only one half of the system is represented.
+Symmetry is accounted for by means of
+a Neumann boudary condition (dn=0) on the symmetry axis. 
+The voltage of the electrode, which is not part the domain of analysis, is set to 1mV
+and is thus imposed as a Dirichlet boundary condition.
+The electrode is laid on a dielectric slab of relative dielectric permeability equal to 9.8,
+and which is grounded on its lower face.
+
+## References
+
+1. [GetDP documentation](http://getdp.info/doc/texinfo/getdp.html)
+
+
+<table width="100%">
+  <tr>
+    <td>
+This work was funded in part by the Walloon Region (WBGreen No 1217703 FEDO, WIST3 No 1017086 ONELAB) and by the Belgian Science Policy (IAP P7/02). Copyright (c) 2012-2017 ULg-ULB.
+    </td>
+  </tr>
+</table>