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-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter25_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter26_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter27_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter28_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter29_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter30_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter31_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter32_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter33_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter34_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter35_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter36_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter37_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter38_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter39_7.ipynb0
-rwxr-xr-x[-rw-r--r--]A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/screenshots/chapter29example32_7.pngbin24417 -> 24417 bytes
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-rwxr-xr-x[-rw-r--r--]Manufacturing_Engineering_&_Technology_by_S._Kalpakjian_and_S._R._Schmid/CHAPTER10.ipynb0
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-rwxr-xr-x[-rw-r--r--]RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter1.ipynb0
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-rwxr-xr-x[-rw-r--r--]Strength_Of_Materials_by_S_S_Bhavikatti/chapter_no.10_9.ipynb0
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-rwxr-xr-x[-rw-r--r--]Unified_Physics_by_S.L._Gupta,_Sanjeev_Gupta/Chapter1.ipynb0
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-rwxr-xr-x[-rw-r--r--]_A_Textbook_of_Electrical_Technology:Transmission,Distribution_And_Utilisation(Vol_III)_by_B.L.Thareja_and_A.K.Thareja/chapter40.ipynb0
-rwxr-xr-x[-rw-r--r--]_A_Textbook_of_Electrical_Technology:Transmission,Distribution_And_Utilisation(Vol_III)_by_B.L.Thareja_and_A.K.Thareja/chapter41.ipynb0
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-rwxr-xr-x[-rw-r--r--]_A_Textbook_of_Electrical_Technology:Transmission,Distribution_And_Utilisation(Vol_III)_by_B.L.Thareja_and_A.K.Thareja/chapter44.ipynb0
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diff --git a/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter25_7.ipynb b/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter25_7.ipynb
index 884c7e96..884c7e96 100644..100755
--- a/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter25_7.ipynb
+++ b/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter25_7.ipynb
diff --git a/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter26_7.ipynb b/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter26_7.ipynb
index 1af9bb80..1af9bb80 100644..100755
--- a/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter26_7.ipynb
+++ b/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter26_7.ipynb
diff --git a/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter27_7.ipynb b/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter27_7.ipynb
index 638b15f1..638b15f1 100644..100755
--- a/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter27_7.ipynb
+++ b/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter27_7.ipynb
diff --git a/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter28_7.ipynb b/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter28_7.ipynb
index 447ef8ab..447ef8ab 100644..100755
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diff --git a/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter29_7.ipynb b/A_Textbook_of_Electrical_Technology_:_AC_and_DC_Machines_(Volume_-_2)_by_A_K_Theraja_B_L_Thereja/chapter29_7.ipynb
index f3eda54f..f3eda54f 100644..100755
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index ce13ea95..ce13ea95 100644..100755
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index a28f10ba..a28f10ba 100644..100755
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index b55eef3c..b55eef3c 100644..100755
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index e0522cdd..e0522cdd 100644..100755
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index 0acd4c7c..0acd4c7c 100644..100755
--- a/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter11.ipynb
+++ b/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter11.ipynb
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index 00ba8990..00ba8990 100644..100755
--- a/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter12.ipynb
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index 88c6cdbf..88c6cdbf 100644..100755
--- a/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter13.ipynb
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index ee39f719..ee39f719 100644..100755
--- a/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter14.ipynb
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index 4f33f0e8..4f33f0e8 100644..100755
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index 862a551d..862a551d 100644..100755
--- a/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter16.ipynb
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index 9cca9ebe..9cca9ebe 100644..100755
--- a/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter17.ipynb
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index 42fdbe26..42fdbe26 100644..100755
--- a/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter18.ipynb
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index cdd3dc10..cdd3dc10 100644..100755
--- a/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter19.ipynb
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index 3b926f9d..3b926f9d 100644..100755
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index 776d6bac..776d6bac 100644..100755
--- a/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter3.ipynb
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index baea0397..baea0397 100644..100755
--- a/RCC_Theory_and_Design_by_M._G._Shah_and_C._M._Kale/Chapter4.ipynb
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index faac3c92..faac3c92 100644..100755
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@@ -0,0 +1,659 @@
+{
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "# 3: Crystal Planes,X-ray Diffraction and Defects in Solids"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 1, Page number 3-19"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 5,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "glancing angle is 21 degrees\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "a=0.28; #lattice spacing(nm)\n",
+ "lamda=0.071; #wavelength of X-rays(nm)\n",
+ "h=1;\n",
+ "k=1;\n",
+ "l=0;\n",
+ "n=2;\n",
+ "\n",
+ "#Calculation\n",
+ "d=a/math.sqrt(h**2+k**2+l**2); \n",
+ "sintheta=n*lamda/(2*d);\n",
+ "theta=math.asin(sintheta)*180/math.pi; #glancing angle(degrees)\n",
+ "\n",
+ "#Result\n",
+ "print \"glancing angle is\",int(theta),\"degrees\""
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 2, Page number 3-19"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 8,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "wavelength of X-rays is 0.0842 nm\n",
+ "maximum order of diffraction is 7\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "d=0.282; #lattice spacing(nm)\n",
+ "theta=(8+(35/60))*math.pi/180; #glancing angle(radian)\n",
+ "n=1; #order\n",
+ "\n",
+ "#Calculation\n",
+ "lamda=2*d*math.sin(theta)/n; #wavelength of X-rays(nm)\n",
+ "n=2*d/lamda; #maximum order of diffraction\n",
+ "\n",
+ "#Result\n",
+ "print \"wavelength of X-rays is\",round(lamda,4),\"nm\"\n",
+ "print \"maximum order of diffraction is\",int(round(n))"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 3, Page number 3-20"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 15,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "fraction of vacancy sites is 8.466 *10**-7\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "T1=773; #temperature(K)\n",
+ "T2=1273; #temperature(K)\n",
+ "f=10**-10; #fraction of vacant sites\n",
+ "\n",
+ "#Calculation\n",
+ "x=round(T1*math.log(f)/T2,3);\n",
+ "N=math.exp(x); #fraction of vacancy sites\n",
+ "\n",
+ "#Result\n",
+ "print \"fraction of vacancy sites is\",round(N*10**7,3),\"*10**-7\""
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 4, Page number 3-21"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "h1=1;\n",
+ "k1=0;\n",
+ "l1=0; #miller indices of (100)\n",
+ "h2=1;\n",
+ "k2=1;\n",
+ "l2=0; #miller indices of (110)\n",
+ "h3=1;\n",
+ "k3=1;\n",
+ "l3=1; #miller indices of (111)\n",
+ "a=1; #assume\n",
+ "\n",
+ "#Calculation\n",
+ "d100=a/math.sqrt(h1**2+k1**2+l1**2); #spacing(nm)\n",
+ "d110=a/math.sqrt(h2**2+k2**2+l2**2); #spacing(nm)\n",
+ "d111=a/math.sqrt(h3**2+k3**2+l3**2); #spacing(nm)\n",
+ "\n",
+ "def lcm(x, y):\n",
+ " if x > y:\n",
+ " greater = x\n",
+ " else:\n",
+ " greater = y\n",
+ " while(True):\n",
+ " if((greater % x == 0) and (greater % y == 0)):\n",
+ " lcm = greater\n",
+ " break\n",
+ " greater += 1\n",
+ " \n",
+ " return lcm\n",
+ "\n",
+ "lcm=lcm(1/d110,1/d111);\n",
+ "#d100=d100*lcm;\n",
+ "#d110=d110*lcm;\n",
+ "#d111=d111*lcm; #ratio d100:d110:d111\n",
+ "\n",
+ "#Result\n",
+ "print \"ratio d100:d110:d111 is\",d100,d110,d111"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 5, Page number 3-21"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 19,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "lattice parameter is 3.522 angstrom\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "n=1; #order\n",
+ "theta=38.2*math.pi/180; #glancing angle(radian)\n",
+ "lamda=1.54; #wavelength(angstrom)\n",
+ "h=2;\n",
+ "k=2;\n",
+ "l=0;\n",
+ "\n",
+ "#Calculation\n",
+ "a=math.sqrt(h**2+k**2+l**2);\n",
+ "d=n*lamda*a/(2*math.sin(theta)); #lattice parameter(angstrom)\n",
+ "\n",
+ "#Result\n",
+ "print \"lattice parameter is\",round(d,3),\"angstrom\""
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 6, Page number 3-22"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 22,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "maximum order of diffraction is 2\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "d=1.6; #lattice spacing(angstrom)\n",
+ "theta=90*math.pi/180; #glancing angle(radian)\n",
+ "lamda=1.5; #wavelength of X-rays(angstrom)\n",
+ "\n",
+ "#Calculation\n",
+ "n=2*d*math.sin(theta)/lamda; #maximum order of diffraction \n",
+ "\n",
+ "#Result\n",
+ "print \"maximum order of diffraction is\",int(n)"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 7, Page number 3-22"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 26,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "length is 0.287 *10**-9 m\n",
+ "volume of unit cell is 0.02366 *10**-27 m**3\n",
+ "answer for volume given in the book varies due to rounding off errors\n",
+ "radius of atom is 0.1243 *10**-9 m\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules \n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "d=0.203*10**-9; #lattice spacing(m)\n",
+ "h=1;\n",
+ "k=1;\n",
+ "l=0; #miller indices of (110)\n",
+ "lamda=1.5; #wavelength of X-rays(angstrom)\n",
+ "\n",
+ "#Calculation\n",
+ "a=d*math.sqrt(h**2+k**2+l**2); #length(m)\n",
+ "V=a**3; #volume of unit cell(m**3)\n",
+ "r=math.sqrt(3)*a/4; #radius of atom(m)\n",
+ "\n",
+ "#Result\n",
+ "print \"length is\",round(a*10**9,3),\"*10**-9 m\"\n",
+ "print \"volume of unit cell is\",round(V*10**27,5),\"*10**-27 m**3\"\n",
+ "print \"answer for volume given in the book varies due to rounding off errors\"\n",
+ "print \"radius of atom is\",round(r*10**9,4),\"*10**-9 m\""
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 8, Page number 3-22"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 27,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "maximum order of diffraction is 2\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "d=1.6; #lattice spacing(angstrom)\n",
+ "theta=90*math.pi/180; #glancing angle(radian)\n",
+ "lamda=1.5; #wavelength of X-rays(angstrom)\n",
+ "\n",
+ "#Calculation\n",
+ "n=2*d*math.sin(theta)/lamda; #maximum order of diffraction \n",
+ "\n",
+ "#Result\n",
+ "print \"maximum order of diffraction is\",int(n)"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 9, Page number 3-23"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 34,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "glancing angle is 20 degrees 42 minutes 17 seconds\n",
+ "answer in the book is wrong\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "a=0.26; #lattice spacing(nm)\n",
+ "lamda=0.065; #wavelength of X-rays(nm)\n",
+ "h=1;\n",
+ "k=1;\n",
+ "l=0;\n",
+ "n=2;\n",
+ "\n",
+ "#Calculation\n",
+ "d=a/math.sqrt(h**2+k**2+l**2); \n",
+ "sintheta=n*lamda/(2*d);\n",
+ "theta=math.asin(sintheta)*180/math.pi; #glancing angle(degrees)\n",
+ "thetad=int(theta); #glancing angle(degrees) \n",
+ "thetam=(theta-thetad)*60; #glancing angle(minutes)\n",
+ "thetas=60*(thetam-int(thetam)); #glancing angle(seconds)\n",
+ "\n",
+ "#Result\n",
+ "print \"glancing angle is\",thetad,\"degrees\",int(thetam),\"minutes\",int(thetas),\"seconds\"\n",
+ "print \"answer in the book is wrong\""
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 10, Page number 3-23"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 36,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "cube edge of unit cell is 4.055 angstrom\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "n=1; #order\n",
+ "theta=19.2*math.pi/180; #glancing angle(radian)\n",
+ "lamda=1.54; #wavelength(angstrom)\n",
+ "h=1;\n",
+ "k=1;\n",
+ "l=1;\n",
+ "\n",
+ "#Calculation\n",
+ "d=n*lamda/(2*math.sin(theta)); #lattice parameter(angstrom)\n",
+ "a=d*math.sqrt(h**2+k**2+l**2); #cube edge of unit cell(angstrom)\n",
+ "\n",
+ "#Result\n",
+ "print \"cube edge of unit cell is\",round(a,3),\"angstrom\""
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 11, Page number 3-24"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 42,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "lattice parameter is 3.522 angstrom\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "n=1; #order\n",
+ "theta=38.2*math.pi/180; #glancing angle(radian)\n",
+ "lamda=1.54; #wavelength(angstrom)\n",
+ "h=2;\n",
+ "k=2;\n",
+ "l=0;\n",
+ "\n",
+ "#Calculation\n",
+ "d=n*lamda/(2*math.sin(theta)); #lattice parameter(angstrom)\n",
+ "a=d*math.sqrt(h**2+k**2+l**2); #lattice parameter(angstrom)\n",
+ "\n",
+ "#Result\n",
+ "print \"lattice parameter is\",round(a,3),\"angstrom\""
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 12, Page number 3-24"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 43,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "interplanar spacing for (111) is 0.208 nm\n",
+ "interplanar spacing for (321) is 0.096 nm\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "a=0.36; #cube edge of unit cell(nm)\n",
+ "h1=1;\n",
+ "k1=1;\n",
+ "l1=1;\n",
+ "h2=3;\n",
+ "k2=2;\n",
+ "l2=1;\n",
+ "\n",
+ "#Calculation\n",
+ "d1=a/math.sqrt(h1**2+k1**2+l1**2); #interplanar spacing for (111)(nm)\n",
+ "d2=a/math.sqrt(h2**2+k2**2+l2**2); #interplanar spacing for (321)(nm)\n",
+ "\n",
+ "#Result\n",
+ "print \"interplanar spacing for (111) is\",round(d1,3),\"nm\"\n",
+ "print \"interplanar spacing for (321) is\",round(d2,3),\"nm\""
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 13, Page number 3-25"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 50,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "lattice spacing is 3.575 angstrom\n",
+ "glancing angle for 3rd order is 16 degrees 27.1 minutes\n",
+ "answer for minutes given in the book varies due to rounding off errors\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "theta=(5+(25/60))*math.pi/180; #glancing angle(radian)\n",
+ "lamda=0.675; #wavelength of X-rays(angstrom)\n",
+ "n1=1; #order\n",
+ "n3=3; #order \n",
+ "\n",
+ "#Calculation\n",
+ "d=n1*lamda/(2*math.sin(theta)); #lattice spacing(angstrom)\n",
+ "d=round(d,3);\n",
+ "theta3=math.asin(n3*lamda/(2*d))*180/math.pi; #glancing angle for 3rd order(degrees)\n",
+ "theta3d=int(theta3); #glancing angle for 3rd order(degrees) \n",
+ "theta3m=(theta3-theta3d)*60; #glancing angle for 3rd order(minutes)\n",
+ "\n",
+ "#Result\n",
+ "print \"lattice spacing is\",d,\"angstrom\"\n",
+ "print \"glancing angle for 3rd order is\",theta3d,\"degrees\",round(theta3m,1),\"minutes\"\n",
+ "print \"answer for minutes given in the book varies due to rounding off errors\""
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 14, Page number 3-25"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 60,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "glancing angle is 23 degrees 56 minutes 31 seconds\n",
+ "answer given in the book is wrong\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "d=3.04; #interplanar spacing(angstrom) \n",
+ "lamda=0.79; #wavelength of X-rays(angstrom)\n",
+ "n=3;\n",
+ "\n",
+ "#Calculation\n",
+ "sintheta=n*lamda/(2*d);\n",
+ "thetad=math.asin(sintheta)*180/math.pi; #glancing angle(degrees)\n",
+ "thetam=(theta-int(theta))*60; #glancing angle(minutes)\n",
+ "thetas=60*(thetam-int(thetam)); #glancing angle(seconds)\n",
+ "\n",
+ "#Result\n",
+ "print \"glancing angle is\",int(round(thetad)),\"degrees\",int(thetam),\"minutes\",int(thetas),\"seconds\"\n",
+ "print \"answer given in the book is wrong\""
+ ]
+ }
+ ],
+ "metadata": {
+ "kernelspec": {
+ "display_name": "Python 2",
+ "language": "python",
+ "name": "python2"
+ },
+ "language_info": {
+ "codemirror_mode": {
+ "name": "ipython",
+ "version": 2
+ },
+ "file_extension": ".py",
+ "mimetype": "text/x-python",
+ "name": "python",
+ "nbconvert_exporter": "python",
+ "pygments_lexer": "ipython2",
+ "version": "2.7.11"
+ }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}
diff --git a/sample_notebooks/SandhyaArroju/Chapter7.ipynb b/sample_notebooks/SandhyaArroju/Chapter7.ipynb
index 73c69a71..73c69a71 100644..100755
--- a/sample_notebooks/SandhyaArroju/Chapter7.ipynb
+++ b/sample_notebooks/SandhyaArroju/Chapter7.ipynb
diff --git a/sample_notebooks/asmitaasmita/1_An_overview_of_C++_2.ipynb b/sample_notebooks/asmitaasmita/1_An_overview_of_C++_2.ipynb
index ecf52ddd..ecf52ddd 100644..100755
--- a/sample_notebooks/asmitaasmita/1_An_overview_of_C++_2.ipynb
+++ b/sample_notebooks/asmitaasmita/1_An_overview_of_C++_2.ipynb
diff --git a/testing_by_df/README.txt b/testing_by_df/README.txt
index b56d70bc..b56d70bc 100644..100755
--- a/testing_by_df/README.txt
+++ b/testing_by_df/README.txt