Added(A)/Deleted(D) following books

 A  Electronics_Engineering_by_P._Raja/chapter_1_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_2_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_3_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_4_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_5_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_6_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_7_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_8_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_9_2.ipynb
A  Electronics_Engineering_by_P._Raja/screenshots/7_2.png
A  Electronics_Engineering_by_P._Raja/screenshots/snap-3_2.png
A  Electronics_Engineering_by_P._Raja/screenshots/snap-6_2.png
A  Machine_Design_by_U.C._Jindal/Ch10.ipynb
A  Machine_Design_by_U.C._Jindal/Ch11.ipynb
A  Machine_Design_by_U.C._Jindal/Ch12.ipynb
A  Machine_Design_by_U.C._Jindal/Ch13.ipynb
A  Machine_Design_by_U.C._Jindal/Ch14.ipynb
A  Machine_Design_by_U.C._Jindal/Ch15.ipynb
A  Machine_Design_by_U.C._Jindal/Ch16.ipynb
A  Machine_Design_by_U.C._Jindal/Ch17.ipynb
A  Machine_Design_by_U.C._Jindal/Ch18.ipynb
A  Machine_Design_by_U.C._Jindal/Ch19.ipynb
A  Machine_Design_by_U.C._Jindal/Ch20.ipynb
A  Machine_Design_by_U.C._Jindal/Ch21.ipynb
A  Machine_Design_by_U.C._Jindal/Ch22.ipynb
A  Machine_Design_by_U.C._Jindal/Ch23.ipynb
A  Machine_Design_by_U.C._Jindal/Ch24.ipynb
A  Machine_Design_by_U.C._Jindal/Ch25.ipynb
A  Machine_Design_by_U.C._Jindal/Ch26.ipynb
A  Machine_Design_by_U.C._Jindal/Ch27.ipynb
A  Machine_Design_by_U.C._Jindal/Ch28.ipynb
A  Machine_Design_by_U.C._Jindal/Ch29.ipynb
A  Machine_Design_by_U.C._Jindal/Ch3.ipynb
A  Machine_Design_by_U.C._Jindal/Ch30.ipynb
A  Machine_Design_by_U.C._Jindal/Ch31.ipynb
A  Machine_Design_by_U.C._Jindal/Ch4.ipynb
A  Machine_Design_by_U.C._Jindal/Ch5.ipynb
A  Machine_Design_by_U.C._Jindal/Ch6.ipynb
A  Machine_Design_by_U.C._Jindal/Ch7.ipynb
A  Machine_Design_by_U.C._Jindal/Ch8.ipynb
A  Machine_Design_by_U.C._Jindal/Ch9.ipynb
A  Machine_Design_by_U.C._Jindal/screenshots/Chapter-3stressgraph.png
A  Machine_Design_by_U.C._Jindal/screenshots/Chapter-_8AdditionalLoad.png
A  Machine_Design_by_U.C._Jindal/screenshots/Chapter11_-_strengthofrevet.png
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter02_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter03_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter04_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter05_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter06_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter07_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter08_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter09_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter10_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter11_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/screenshots/Screenshot_3.1.py.PNG
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/screenshots/Screenshot_6.1.py.PNG
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/screenshots/Screenshot_6.2.py.PNG
A  sample_notebooks/PriyankaSaini/Chapter3.ipynb
A  sample_notebooks/ebbygeorge/Chapter01.ipynb

1 files changed, 295 insertions, 0 deletions

diff --git a/sample_notebooks/PriyankaSaini/Chapter3.ipynb b/sample_notebooks/PriyankaSaini/Chapter3.ipynb
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--- /dev/null
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@@ -0,0 +1,295 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:d42b95d086e994736fd89da8bf44c85325c991b363e30dcf52a4839620130b97"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Ch-3 Electroluminescent Sources"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.1  Page no 80"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "from __future__ import division\n",
+      "from math import log\n",
+      "#Calculation of barrier potential\n",
+      "#Given data\n",
+      "p=5#                        # Resistivity of p-region\n",
+      "n=2#                        # Resistivity of n-region\n",
+      "mu=3900#\n",
+      "k=0.026#                    #Boltzmann constant\n",
+      "ni=2.5*10**13#              #Density of the electron hole pair\n",
+      "e=1.6*10**-19#              #charge of electron\n",
+      " \n",
+      "#Barrier potential calculation\n",
+      "r0=(1/p)#          # Reflection at the fiber air interface \n",
+      "r1=(1/n)#\n",
+      "m=r1/(mu*e)#\n",
+      "p=6.5*10**14#       #Density of hole in p -region\n",
+      "Vb=k*log(p*m/ni**2)#\n",
+      "print \"Barrier potential = %0.3f V\"%Vb\n",
+      "\n",
+      "# The answers vary due to round off error"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Barrier potential = 0.175 V\n"
+       ]
+      }
+     ],
+     "prompt_number": 19
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.15 Page no 484"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# Calculation of external efficiency \n",
+      "#Given data\n",
+      "ne1=0.20#       #Total efficiency \n",
+      "V=3#            # Voltage applied\n",
+      "Eg=1.43#        # Bandgap energy\n",
+      "\n",
+      "# External efficiency\n",
+      "ne=(ne1*Eg/V)*100#\n",
+      "print \"External efficiency of the device = %0.1f %% \"%(ne)#"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "External efficiency of the device = 9.5 % \n"
+       ]
+      }
+     ],
+     "prompt_number": 6
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.16 Page no 484"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "from math import exp\n",
+      "#  Calculation of ratio of threshold current densities\n",
+      "# Given data\n",
+      "To1=160#                     # Device temperature\n",
+      "To2=55#                      # Device temperature\n",
+      "T1=293#\n",
+      "T2=353#\n",
+      "J81=exp(T1/To1)#            # Threshold current density \n",
+      "J21=exp(T2/To1)#\n",
+      "J82=exp(T1/To2)## \n",
+      "J22=exp(T2/To2)## \n",
+      "cd1=J21/J81#               # Ratio of threshold current densities\n",
+      "cd2=J22/J82#\n",
+      "\n",
+      "print\"Ratio of threshold current densities= %0.2f  \"%(cd1)\n",
+      "print\"Ratio of threshold current densities= %0.2f  \"%(cd2)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Ratio of threshold current densities= 1.45  \n",
+        "Ratio of threshold current densities= 2.98  \n"
+       ]
+      }
+     ],
+     "prompt_number": 9
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.17 Page no 484"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Computation of conversion efficiency \n",
+      "#Given data\n",
+      "i=10*10**-6#            # Device current\n",
+      "p=5#                  # Electrical power\n",
+      "op=50 *10**-6#         # Optical power\n",
+      "ip=5*10*10**-3#        # Input power\n",
+      "\n",
+      "#Conversion efficiency\n",
+      "c=op/ip*100#              \n",
+      "print \"Conversion efficiency = %0.1f %% \"%(c)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Conversion efficiency = 0.1 % \n"
+       ]
+      }
+     ],
+     "prompt_number": 18
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.18 Page no 485"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# Calculation of total power emitted\n",
+      "#Given data\n",
+      "r=0.7#            # Emissivity\n",
+      "r0=5.67*10**-8#    # Stephen's constant\n",
+      "A=10**-4#          # Surface area\n",
+      "T=2000#           # Temperature\n",
+      "\n",
+      "# Total power emitted\n",
+      "P=r*r0*A*T**4#                     \n",
+      "\n",
+      "print\"Total power emitted = %0.1f Watts \"%P"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Total power emitted = 63.5 Watts \n"
+       ]
+      }
+     ],
+     "prompt_number": 14
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.19 Page no 485"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# Computation of total energy\n",
+      "#Given data\n",
+      "h=6.63*10**-34#        # Planck constant\n",
+      "v=5*10**14#            # Bandgap frequency of laser\n",
+      "N=10**24#              # Population inversion density\n",
+      "V=10**-5#              # Volume of laser medium\n",
+      "\n",
+      "# Total energy\n",
+      "E=(1/2)*h*v*(N)*V#           \n",
+      "\n",
+      "print \"Total energy = %0.1f J \"%E"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Total energy = 1.7 J \n"
+       ]
+      }
+     ],
+     "prompt_number": 13
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.20 Page no 485"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# Computation of pulse power\n",
+      "# Given data\n",
+      "L=0.1#               # Length of laser\n",
+      "R=0.8#               # Mirror reflectance of end mirror\n",
+      "E=1.7#               # Laser pulse energy\n",
+      "c=3*10**8#            # Velocity of light\n",
+      "t=L/((1-R)*c)#         # Cavity life time\n",
+      "\n",
+      "# Pulse power\n",
+      "p=E/t#                       \n",
+      "\n",
+      "print\"Pulse power = %0.0f W \"%p"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Pulse power = 1020000000 W \n"
+       ]
+      }
+     ],
+     "prompt_number": 20
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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