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author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 18:04:34 +0100
parents f0afece42f48
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1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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2 "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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3
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4 <html lang="en">
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5 <head>
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6 <meta name="generator" content=
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7 "HTML Tidy for Mac OS X (vers 1st December 2004), see www.w3.org">
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8 <meta http-equiv="Content-Type" content=
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9 "text/html; charset=us-ascii">
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10
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11 <title>Version 2.2 LTPDA Toolbox Software (LTPDA Toolbox)</title>
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12 <link rel="stylesheet" href="docstyle.css" type="text/css">
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13 <meta name="generator" content="DocBook XSL Stylesheets V1.52.2">
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14 <meta name="description" content=
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15 "Presents an overview of the features, system requirements, and starting the toolbox.">
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16 </head>
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17
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18 <body>
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19 <a name="top_of_page" id="top_of_page"></a>
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20
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21 <p style="font-size:1px;">&nbsp;</p>
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22
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23 <table class="nav" summary="Navigation aid" border="0" width=
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24 "100%" cellpadding="0" cellspacing="0">
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25 <tr>
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26 <td valign="baseline"><b>LTPDA Toolbox</b></td><td><a href="../helptoc.html">contents</a></td>
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27
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28 <td valign="baseline" align="right"><a href=
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29 "releasenotesV2_3.html"><img src="b_prev.gif" border="0" align=
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30 "bottom" alt="Version 2.3 LTPDA Toolbox Software"></a>&nbsp;&nbsp;&nbsp;<a href=
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31 "releasenotesV2_1.html"><img src="b_next.gif" border="0" align=
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32 "bottom" alt="Version 2.1 LTPDA Toolbox Software"></a></td>
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33 </tr>
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34 </table>
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35
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36 <h1 class="title"><a name="f3-12899" id="f3-12899"></a>Version 2.2 LTPDA Toolbox Software</h1>
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37 <hr>
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38
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39 <p>
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40
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41 <!-- BEGIN: Content file -->
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42
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43 <a name="top_of_page"></a>
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44 <p>This table summarizes what's new in Version 2.2:</p>
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45 <table cellspacing="0" class="body" cellpadding="4" border="2" width="100%">
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46 <colgroup>
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47 <col width="25%">
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48 <col width="25%">
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49 <col width="25%">
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50 <col width="25%">
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51 </colgroup>
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52 <thead>
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53 <tr valign="top">
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54 <th bgcolor="#B2B2B2" valign="top"><p>New Features and Changes</p></th>
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55 <th bgcolor="#B2B2B2" valign="top"><p>Version Compatibility Considerations</p></th>
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56 <th bgcolor="#B2B2B2" valign="top"><p>Fixed Bugs and Known Problems</p></th>
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57 <th bgcolor="#B2B2B2" valign="top"><p>Related Documentation at Web Site</p></th>
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58 </tr>
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59 </thead>
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60 <tbody>
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61 <tr valign="top">
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62 <td bgcolor="#F2F2F2"><p>Yes<br>Details below</p></td>
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63 <td bgcolor="#F2F2F2"><p>Yes &#8212; Details labeled as <b>New repository manager</b> in descriptions of changes, below. See also <a href="#rm">Summary</a>.</p></td>
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64 <td bgcolor="#F2F2F2"><p><a href="https://ed.fbk.eu/ltpda/mantis/login_page.php" target="_top">Bug Reports</a> at Web site</p></td>
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65 <td bgcolor="#F2F2F2"><p>Printable Release Notes: <a href="http://www.lisa.aei-hannover.de/ltpda/downloads/version_2.2/files/Release_Notes_v2.2.pdf" target="_top">PDF</a></p></td>
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66 </tr>
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67 </tbody>
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68 </table>
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69 <p></p>
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70 <ul>
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71 <li><p><a href="#introduction">Introduction</a></p></li>
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72 <li><p><a href="#newFeatures">New toolbox features</a></p></li>
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73 <li><p><a href="#newFitting">New linear fitting tools in LTPDA</a></p></li>
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74 <li><p><a href="#rm">New repository manager</a></p></li>
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75 </ul>
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76
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77 <!-- HEADLINE: Introduction -->
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78
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79 <h3 class="title" id="introduction">Introduction</h3>
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80 <p>This version of LTPDA is 2.2. This document lists the changes since V2.1.</p>
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81
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82 <!-- HEADLINE: New toolbox features -->
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83
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84 <h3 class="title" id="newFeatures">New toolbox features</h3>
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85 <p>Version 2.2 of LTPDA has various new features.</p>
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86 <ul>
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87 <li><p>A reworking of the way connections to LTPDA repositories are handled. Now all connections are managed by the new "LTPDA Repository Manager" object which is created when <b>ltpda_startup</b> is executed. <i>All users should review their use of repository connection code in any scripts and make the appropriate changes to work with the repository manager</i> (<a href="#rm">see below</a>).</p></li>
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88 <li><p>A significant amount of work has been done on fitting tools (<a href="#newFitting">see below</a>).</p></li>
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89 <li><p>A new class called pest (parameter estimation) has been included which aims to capture details of the various fitting procedures in LTPDA. <i>Objects of this class are now output from all LTPDA fitting function, so some changes to existing analysis scripts and pipelines may be necessary</i>.</p></li>
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90 </ul>
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91
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92 <!-- HEADLINE: New linear fitting tools in LTPDA -->
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93
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94 <h3 class="title" id="newFitting">New linear fitting tools in LTPDA</h3>
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95 <p>The linear fitting tools are specialised <b>ao</b> methods, built around MATLAB's <b>lscov</b>. All of them return a <b>pest</b> (parameters estimate) object where the fields are containing:</p>
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96 <ol>
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97 <li><p>Fit parameters</p></li>
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98 <li><p>Uncertainties on the fit parameters (given as standard deviations)</p></li>
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99 <li><p>The reduced CHI2 of the fit</p></li>
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100 <li><p>The covariance matrix</p></li>
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101 <li><p>The degrees of freedom of the fit.</p></li>
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102 </ol>
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103 <p>The following methods are implemented:</p>
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104 <ul>
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105 <li><p><b>ao/linfit</b> solves an equation in the form <b>Y = P(1) + X * P(2)</b> for the fit parameters <b>P</b>.</p></li>
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106 <li><p><b>ao/bilinfit</b> solves an equation in the form <b>Y = X(1) * P(1) + X(2) * P(2) + ... + P(N+1)</b> for the fit parameters <b>P</b>.</p></li>
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107 <li><p><b>ao/polyfit</b> overloads <b>polyfit()</b> function of MATLAB for Analysis Objects. It finds the coefficients of a polynomial P(X) of degree N that fits the data Y best in a least-squares sense: <b>P(1)*X^N + P(2)*X^(N-1) +...+ P(N)*X + P(N+1)</b></p></li>
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108 <li><p><b>ao/polynomfit</b> solves an equation in the form <b>Y = P(1) * X^N(1) + P(2) * X^N(2) + ...</b> for the fit parameters <b>P</b>. It handles arbitrary powers of the input vector and uncertainties on the dependent vector Y and input vectors X.</p></li>
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109 <li><p><b>ao/lscov</b> is a wrapper for MATLAB's <b>lscov</b> function. It solves a set of linear equations by performing a linear least-squares fit. It solves the problem <b>Y = HX</b> where X are the parameters, Y the measurements, and H the linear equations relating the two.</p></li>
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110 </ul>
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111
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112 <!-- HEADLINE: New repository manager -->
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113
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114 <h3 class="title" id="rm">New repository manager</h3>
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115 <p>Until the main documentation is updated, the following a some quick tips to using
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116 the new repository manager.</p>
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117 <p>Only a single instance of the repository manager exists. It is created when you
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118 run <b>ltpda_startup</b>. To access the repository manager, you can do:</p>
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119 <div class="fragment"><pre>
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120 >> rm = LTPDARepositoryManager
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121 ---- Repository Manager -----
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122 connections: 0
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123 connected: 0
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124 ------------------------------</pre></div>
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125 <p>The Repository Manager has both a scripting interface and a graphical user interface. To launch the GUI:</p>
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126 <div class="fragment"><pre>
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127 >> rm.showGui</pre></div>
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128 <img src="images/RepositoryManager.png" alt="Repository Manager" border="3" width="588px" height="267px" vspace="10px">
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129 <p>Using the scripting interface, you can create new connections and search for existing connects:</p>
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130 <div class="fragment"><pre>
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131 >> rm.newConnection('localhost', 'ltpda_test', 'hewitson')</pre></div>
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132 <p>specifying the hostname, the database and the username. You can also give the password
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133 in plain text to the newConnection command, but that's clearly not advisable.</p>
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134 <p>Making new connections like this allows you to set up your typical connections in
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135 your <b>startup.m</b> file (after executing <b>ltpda_startup</b>).</p>
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136 <p>A couple of words about time-outs. The repository manager uses two timers to maintain two
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137 aspects of each connection.</p>
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138 <p>The first timer handles whether or not the connection is actually connected to the server. This
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139 timer is not user configurable and is set to fire every few seconds so that connections are
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140 typically in the disconnected state (you can see this state in the 'age' column of the
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141 repository manager gui). Whenever the user tries to use a valid existing connection, the
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142 connection is opened and then locked until it is not needed anymore. This is transparent for
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143 the user and is handled automatically in methods like <b>submit</b>, <b>retrieve</b> and <b>update</b>.</p>
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144 <p>The second timer is user configurable via the LTPDA preferences. This timer defines when the
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145 password for each connection expires. This creates a level of safety so that connections from
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146 one user can not easily be abused by other uses. When this password fires, it checks how
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147 long each connection has been idle, and clears the password if it is older than the setting in
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148 the preferences. Connections with their password cleared are red on the repository manager
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149 gui. The next time the user attempts to use a connection whose password has been cleared,
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150 they will be prompted to re-enter the password.</p>
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151
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152 <!-- END: Content file -->
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153
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154 </p>
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155
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156 <br>
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157 <br>
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158 <table class="nav" summary="Navigation aid" border="0" width=
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159 "100%" cellpadding="0" cellspacing="0">
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160 <tr valign="top">
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161 <td align="left" width="20"><a href="releasenotesV2_3.html"><img src=
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162 "b_prev.gif" border="0" align="bottom" alt=
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163 "Version 2.3 LTPDA Toolbox Software"></a>&nbsp;</td>
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164
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165 <td align="left">Version 2.3 LTPDA Toolbox Software</td>
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166
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167 <td>&nbsp;</td>
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168
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169 <td align="right">Version 2.1 LTPDA Toolbox Software</td>
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170
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171 <td align="right" width="20"><a href=
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172 "releasenotesV2_1.html"><img src="b_next.gif" border="0" align=
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173 "bottom" alt="Version 2.1 LTPDA Toolbox Software"></a></td>
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174 </tr>
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175 </table><br>
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176
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Daniele Nicolodi <nicolodi@science.unitn.it>
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177 <p class="copy">&copy;LTP Team</p>
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178 </body>
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179 </html>