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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 9: Superconducting materials"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 9.1: calculate_critical_magnetic_field_intensity.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// chapter 9 , Example9.1 , pg 255\n",
+"H0=6.5*10^4     //magnetic field intensity at 0K   (in  A/m)\n",
+"T=4.2      //temperature   (in K)\n",
+"Tc=7.18     //critical temperature  (in K)\n",
+"Hc=H0*(1-(T^2/Tc^2))    // critical magnetic field intensity\n",
+"printf('critical magnetic field intensity\n')\n",
+"printf('Hc=%.0f   A/m',Hc)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 9.2: calculate_isotopic_mass.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// chapter 9 , Example9.2 , pg 255\n",
+"M1=199.5    //isotopic mass\n",
+"Tc1=4.185    //critical temperature for M1   (in K)\n",
+"Tc2=4.133    //critical temperature for M2   (in K)\n",
+"alpha=0.5\n",
+"\n",
+"//M^alpha * Tc=constant\n",
+"M2=((M1^alpha*Tc1)/Tc2)^(1/alpha)\n",
+"printf('Isotopic mass at critical temperature 4.133K\n')\n",
+"printf('M2=%.3f ',M2)"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}