Added(A)/Deleted(D) following books

 A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/Chapter_12_Ploymers_and_Polymerization_2.ipynb
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/Chapter_13_Fuel_and_Combustions_2.ipynb
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/Chapter_14_Water_Treatment_2.ipynb
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/Chapter_15_Environmental_Pollution_and_Control_2.ipynb
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/Chapter_1_Structure_and_Bonding_2.ipynb
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/Chapter_2_Spectroscopy_and_Photochemistry_2.ipynb
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/Chapter_3_Thermodynamics_and_Chemical_Equilibrium_2.ipynb
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/Chapter_5_Chemical_Kinetics_and_Catalysis_2.ipynb
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/Chapter_6_Electrochemistry_2.ipynb
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/Chapter_7_Solid_State_2.ipynb
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/screenshots/Screenshot_from_2016-03-05_22:17:52.png
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/screenshots/Screenshot_from_2016-03-05_22:22:12.png
A  Advanced_Engineering_Chemistry__by_Dr._M.R._Senapati/screenshots/Screenshot_from_2016-03-05_22:24:08.png
A  "sample_notebooks/Ashish Kumar/Ch13.ipynb"
A  sample_notebooks/Babita./Ch5.ipynb
A  sample_notebooks/NareshKumar/Ch2.ipynb
A  "sample_notebooks/Suhaib Alam/Ch14.ipynb"
A  sample_notebooks/hemanth/Untitled1.ipynb
A  sample_notebooks/hemanth/Untitled1_1.ipynb

1 files changed, 441 insertions, 0 deletions

diff --git a/sample_notebooks/NareshKumar/Ch2.ipynb b/sample_notebooks/NareshKumar/Ch2.ipynb
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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter 2 Switched communication systems"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.2, page no 125"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "maximum auxillary current is:10.00 mA\n",
+      "\n",
+      "MMF in the auxillary winding is:2.00AT \n",
+      "\n",
+      "MMF in main winding is:40.00 AT \n",
+      "\n",
+      "net MMF required in main winding is:44.00 AT \n",
+      "\n",
+      "operating current needed is:4.40 mA \n",
+      "\n",
+      "working voltage is:2.84 volts \n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "from __future__ import division\n",
+    "#given\n",
+    "Io=4*10**-3 #rqueired operating current\n",
+    "N1=10000 #no of turns in the main winding\n",
+    "R1=645 #resistence of the main winding in ohms\n",
+    "N2=200 #no of turns in auxillary winding\n",
+    "B=2 #spacing bias\n",
+    "Iaux=B/N2 #maximum auxillary current\n",
+    "print \"maximum auxillary current is:%0.2f mA\\n\"%(Iaux*1e3)\n",
+    "MMFaux=N2*Iaux #MMF in the auxillary winding\n",
+    "print \"MMF in the auxillary winding is:%0.2fAT \\n\"%(MMFaux)\n",
+    "MMFop=Io*N1 #operating MFF in main winding\n",
+    "print \"MMF in main winding is:%0.2f AT \\n\"%(MMFop)\n",
+    "MMFnet=MMFop+(0.1*MMFop) #net MMF required in main winding\n",
+    "print \"net MMF required in main winding is:%0.2f AT \\n\"%(MMFnet)\n",
+    "Iop=MMFnet/N1 #operating current needed\n",
+    "print \"operating current needed is:%0.2f mA \\n\"%(Iop*1e3)\n",
+    "V=Iop*R1 #working voltage in volts\n",
+    "print \"working voltage is:%0.2f volts \\n\"%(V)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.3,page no 125"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Busy hour calling rate is:1.20 \n",
+      "\n",
+      "Rate of traffic flow is 250.00 traffic unit \n"
+     ]
+    }
+   ],
+   "source": [
+    "#given\n",
+    "C=6000#Tatol no of call in busy hour\n",
+    "SC=5000#no of subscribers\n",
+    "CR=C/SC#busy hour calling rate\n",
+    "print \"Busy hour calling rate is:%0.2f \\n\"%(CR)\n",
+    "T=2.5/60#avarage duration of calls in hours\n",
+    "\n",
+    "A=C*T#rate of traffic flow\n",
+    "print \"Rate of traffic flow is %0.2f traffic unit \"%(A)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.4,page no 126"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "maxixmum current is 33.33 mamps \n",
+      "\n",
+      "operate lag is 1.83 msec \n",
+      "\n",
+      "release lag is 2.85 msec \n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import log\n",
+    "#given\n",
+    "L=3#relay inductance in henry\n",
+    "R=1500#relay resistance in ohm\n",
+    "Io=20e-3#oparating current in amps\n",
+    "Ir=8e-3#release current in amps\n",
+    "\n",
+    "V=50#supply volatage in volts\n",
+    "Im=V/R#maxixmum current in amps\n",
+    "print \"maxixmum current is %0.2f mamps \\n\"%(Im*1e3)\n",
+    "to=(L/R)*log(1/(1-(Io/Im)))#operate lag in sec\n",
+    "print \"operate lag is %0.2f msec \\n\"%(to*1000)\n",
+    "tr=(L/R)*log(Im/Ir)#release lag in sec\n",
+    "print \"release lag is %0.2f msec \\n\"%(tr*1000)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.4.1,page no 126"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "(a)\n",
+      "periods per character is:150.00 msec\n",
+      "\n",
+      "period per element is:20.00 msec\n",
+      "\n",
+      "speed is:50.00 bauds\n",
+      "\n",
+      "\n",
+      "(b)\n",
+      "periods per character is:100.00 msec\n",
+      "\n",
+      "period per element is:13.33 msec\n",
+      "\n",
+      "speed is 75.00 bauds\n",
+      "\n",
+      "\n",
+      "(c)\n",
+      "periods per character is:100.00 msec\n",
+      "\n",
+      "period per element is:10.00 msec\n",
+      "\n",
+      "speed is 100.00 bauds\n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "#given\n",
+    "#a\n",
+    "C_S1=20/3#speed in characters per second\n",
+    "P_C1=1/C_S1#periods per character\n",
+    "print \"(a)\\nperiods per character is:%0.2f msec\\n\"%(P_C1*1e3)\n",
+    "E_C1=7.5#elements per character\n",
+    "P_E1=P_C1/E_C1#period per element\n",
+    "print \"period per element is:%0.2f msec\\n\"%(P_E1*1e3)\n",
+    "Sb1=1/P_E1#speed in bauds\n",
+    "print \"speed is:%0.2f bauds\\n\\n\"%(Sb1)\n",
+    "#b\n",
+    "C_S2=10#speed in characters per second\n",
+    "P_C2=1/C_S2#periods per character\n",
+    "print \"(b)\\nperiods per character is:%0.2f msec\\n\"%(P_C2*1e3)\n",
+    "E_C2=7.5#elements per character\n",
+    "P_E2=P_C2/E_C2#period per element\n",
+    "print \"period per element is:%0.2f msec\\n\"%(P_E2*1e3)\n",
+    "Sb2=1/P_E2#speed in bauds\n",
+    "print \"speed is %0.2f bauds\\n\\n\"%( Sb2)\n",
+    "#c\n",
+    "C_S3=10#speed in characters per second\n",
+    "P_C3=1/C_S3#periods per character\n",
+    "print \"(c)\\nperiods per character is:%0.2f msec\\n\"%(P_C3*1e3)\n",
+    "E_C3=10#elements per character\n",
+    "P_E3=P_C3/E_C3#period per element\n",
+    "print \"period per element is:%0.2f msec\\n\"%(P_E3*1e3)\n",
+    "Sb3=1/P_E3#speed in bauds\n",
+    "print \"speed is %0.2f bauds\\n\"%(Sb3)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.5,page no 127"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "total inductance is 0.05 H \n",
+      "\n",
+      "maximum current is 10.00 mA \n",
+      "\n",
+      "operating current is 5.00 mA \n",
+      "\n",
+      "operate lag is 0.35 msec \n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "#given\n",
+    "N=1000#no of turns\n",
+    "L1=5e-8#inductance per turn\n",
+    "L=N**2*L1#total inductance\n",
+    "print \"total inductance is %0.2f H \\n\"%(L)\n",
+    "R=100#resistance of winding in ohm\n",
+    "MMF=5#operating MMF in amp. turn\n",
+    "V=1#voltage of received signal in volts\n",
+    "Im=V/R#maximum current\n",
+    "print \"maximum current is %0.2f mA \\n\"%(Im*1e3)\n",
+    "Io=MMF/N#operating current\n",
+    "print \"operating current is %0.2f mA \\n\"%(Io*1e3)\n",
+    "to=(L/R)*log(1/(1-(Io/Im)))#operate lag\n",
+    "print \"operate lag is %0.2f msec \\n\"%(to*1e3)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.6,page no 128"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Busy hour calling rate is:1.60 \n",
+      "\n",
+      "Rate of traffic flow is 693.33 traffic unit \n"
+     ]
+    }
+   ],
+   "source": [
+    "#given\n",
+    "S=10000#no of subscribers\n",
+    "C=16000#Tatol no of call in busy hour\n",
+    "CR=C/S#busy hour calling rate\n",
+    "print \"Busy hour calling rate is:%0.2f \\n\"%(CR)\n",
+    "T=2.6#avarage duration of calls in min\n",
+    "\n",
+    "A=C*(T/60)#rate of traffic flow\n",
+    "print \"Rate of traffic flow is %0.2f traffic unit \"%(A)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.7,page no 135"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "duration of each element is:10.00 msec\n",
+      "\n",
+      "speed is 100.00 bauds\n",
+      "\n",
+      "total possible combinations are:128.00\n"
+     ]
+    }
+   ],
+   "source": [
+    "#given\n",
+    "N=7#no of character elements\n",
+    "E_C=10#elements per character (1+7+1+1)\n",
+    "To=100e-3#duration of one character\n",
+    "Te=To/E_C#duration of each element\n",
+    "print \"duration of each element is:%0.2f msec\\n\"%(Te*1e3)\n",
+    "Sb=1/Te#speed in bauds\n",
+    "print \"speed is %0.2f bauds\\n\"%(Sb)\n",
+    "C=2**N#total possible combinations\n",
+    "print \"total possible combinations are:%0.2f\"%(C)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.8,page no 129"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Total no of call in busy hour is:1500.00 calls per Hour\n",
+      "\n",
+      "Busy hour calling rate is:1.50 \n",
+      "\n",
+      "grade of service is: 0.02\n"
+     ]
+    }
+   ],
+   "source": [
+    "#given\n",
+    "S=1000#no of subscribers\n",
+    "T=2.4/60#avarage duration of calls in hours\n",
+    "A=60#rate of traffic flow\n",
+    "C=A/T#Tatol no of call in busy hour\n",
+    "print \"Total no of call in busy hour is:%0.2f calls per Hour\\n\"%(C)\n",
+    "CR=C/S#busy hour calling rate\n",
+    "print \"Busy hour calling rate is:%0.2f \\n\"%(CR)\n",
+    "SCL=30#no of call lost per hour\n",
+    "\n",
+    "B=SCL/(C+SCL)#grade of service\n",
+    "print \"grade of service is: %0.2f\"%(B)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.9,page no 129"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 24,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "grade of service is: 2.00e-03\n",
+      "\n",
+      "traffic lost is: 1.80e-03\n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import factorial\n",
+    "#given\n",
+    "N=5#no of switches\n",
+    "A=0.9#traffic offered \n",
+    "#grade of service B=(A**N/N!)/(1+A+A**2/2!+A**3/3!+...+A**N/N!)\n",
+    "#here\n",
+    "B=(A**N/factorial(N))/(1+A+(A**2/factorial(2))+(A**3/factorial(3))+(A**4/factorial(4))+(A**5/factorial(5)))\n",
+    "print \"grade of service is: %0.2e\\n\"%(B)\n",
+    "Tl=A*B#traffic lost\n",
+    "print \"traffic lost is: %0.2e\"%(Tl)"
+   ]
+  }
+ ],
+ "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": "2.7.9"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}