0
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
2 "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
3
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
4 <html lang="en">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
5 <head>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
6 <meta name="generator" content=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
7 "HTML Tidy for Mac OS X (vers 1st December 2004), see www.w3.org">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
8 <meta http-equiv="Content-Type" content=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
9 "text/html; charset=us-ascii">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
10
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
11 <title>Spikes reduction in data (LTPDA Toolbox)</title>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
12 <link rel="stylesheet" href="docstyle.css" type="text/css">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
13 <meta name="generator" content="DocBook XSL Stylesheets V1.52.2">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
14 <meta name="description" content=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
15 "Presents an overview of the features, system requirements, and starting the toolbox.">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
16 </head>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
17
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
18 <body>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
19 <a name="top_of_page" id="top_of_page"></a>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
20
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
21 <p style="font-size:1px;"> </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
22
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
23 <table class="nav" summary="Navigation aid" border="0" width=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
24 "100%" cellpadding="0" cellspacing="0">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
25 <tr>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
26 <td valign="baseline"><b>LTPDA Toolbox</b></td><td><a href="../helptoc.html">contents</a></td>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
27
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
28 <td valign="baseline" align="right"><a href=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
29 "interp.html"><img src="b_prev.gif" border="0" align=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
30 "bottom" alt="Interpolating data"></a> <a href=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
31 "gapfill.html"><img src="b_next.gif" border="0" align=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
32 "bottom" alt="Data gap filling"></a></td>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
33 </tr>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
34 </table>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
35
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
36 <h1 class="title"><a name="f3-12899" id="f3-12899"></a>Spikes reduction in data</h1>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
37 <hr>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
38
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
39 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
40 <h2>Description</h2>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
41 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
42 Spikes in data due to different nature can be removed, if desired, from the original data. LTPDA <a href="matlab:doc('ao/spikecleaning')"><tt>spikecleaning</tt></a> detects and replaces
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
43 spikes of the input AOs. A spike in data is defined as a single sample exceeding a certain value (usually, the
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
44 floor noise of the data) defined by the user:
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
45 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
46 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
47 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
48 <div align="center">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
49 <IMG src="images/spike10x.png" width="147" height="15" border="0" />
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
50 </div>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
51 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
52 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
53 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
54 where <IMG src="images/spike41x.png" width="50" height="14" border="0" /> is the input data high-pass filtered, <IMG src="images/spike42x.png" width="34" height="13" border="0"/> is a value defined by the user (by default is 3.3) and <IMG src="images/spike43x.png" width="35" height="8" border="0"/> is the standard deviation of <IMG src="images/spike41x.png" width="50" height="14" border="0" /> . In consequence, a spike is defined as the value that exceeds the floor noise of the data by a factor <IMG src="images/spike42x.png" width="34" height="13" border="0"/>, the higher of this parameter the more difficult to "detect" a spike.
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
55 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
56 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
57 <h2>Syntax</h2>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
58 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
59 <div class="fragment"><pre>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
60 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
61 b = spikecleaning(a, pl)
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
62 </pre>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
63 </div>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
64 <h2>Parameters</h2>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
65 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
66 The following parameters can be set in this method:
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
67 <ul>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
68 <li> <tt>'kspike'</tt> - set the <IMG src="images/spike42x.png" width="34" height="13" border="0"/> value (default is 3.3) </li>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
69 <li> <tt>'method'</tt> - method used to replace the "spiky" sample. Three methods are available ---see below for details---:</li>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
70 <ul>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
71 <li> <tt>'random'</tt> </li>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
72 <li> <tt>'mean'</tt> </li>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
73 <li> <tt>'previous'</tt> </li>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
74 </ul>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
75 <li> <tt>'fc'</tt> - frequency cut-off of the high-pass IIR filter (default is 0.025) </li>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
76 <li> <tt>'order'</tt> - specifies the order of the IIR filter (default is 2) </li>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
77 <li> <tt>'ripple'</tt> - specifies pass/stop-band ripple for bandpass and bandreject filters (default is 0.5) </li>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
78 </ul>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
79 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
80 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
81 <h2>Algorithm</h2>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
82 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
83 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
84 <b>Random: </b> this method substitutes the spiky sample by:
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
85 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
86 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
87 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
88 <div align="center">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
89 <IMG src="images/spike20x.png" width="197" height="15" align="center" border="0"/>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
90 </div>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
91 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
92 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
93 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
94 where <IMG src="images/spike44x.png" width="42" height="14" border="0"/> is a random number of mean zero and standard deviation 1.
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
95 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
96 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
97 <b>Mean: </b>this method uses the following equation to replace the spike detected in data.
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
98 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
99 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
100 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
101 <div align="center">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
102 <IMG src="images/spike30x.png" width="158" height="29" align="center" border="0"/>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
103 </div>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
104 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
105 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
106 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
107 <b>Previous: </b>the spike is substitued by the previous sample, i.e.:
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
108 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
109 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
110 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
111 <div align="center">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
112 <IMG src="images/spike40x.png" width="90" height="14" align="center" border="0"/>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
113 </div>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
114 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
115 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
116 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
117 <h2>Examples</h2>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
118 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
119 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
120 1. Spike cleaning of a sequence of random data with <tt>kspike = 2</tt>.
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
121 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
122 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
123 <div class="fragment"><pre>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
124 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
125 x = ao(plist( <span class="string">'waveform'</span>, <span class="string">'noise'</span>, <span class="string">'nsecs'</span>,1e4, <span class="string">'fs'</span>,10)); <span class="comment">% create an AO of random data sampled at 1 Hz.</span>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
126 pl = plist( <span class="string">'kspike'</span>, 2); <span class="comment">% kspike = 2</span>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
127 y = spikecleaning(x, pl); <span class="comment">% spike cleaning function applied to the input AO, x</span>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
128 iplot(x, y) <span class="comment">% plot original and "cleaned" data</span>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
129 </pre>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
130 </div>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
131 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
132 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
133 <div align="center">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
134 <img src="images/spike1.png" border="1" >
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
135 </div>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
136 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
137 <!-- <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
138 2. Example of real data: the first image shows data from the real world prior to
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
139 the application of the spike cleaning tool. It is clear that some spikes are
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
140 present in data and might be convenient to remove them. The second image shows
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
141 the same data after the spike samples supression.
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
142 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
143 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
144 <img src="images/stat1x.png" border="1" width="400px">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
145 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
146 <p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
147 <img src="images/stat2x.png" border="1" width="400px">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
148 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
149 -->
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
150
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
151
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
152
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
153 </p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
154
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
155 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
156 <br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
157 <table class="nav" summary="Navigation aid" border="0" width=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
158 "100%" cellpadding="0" cellspacing="0">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
159 <tr valign="top">
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
160 <td align="left" width="20"><a href="interp.html"><img src=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
161 "b_prev.gif" border="0" align="bottom" alt=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
162 "Interpolating data"></a> </td>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
163
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
164 <td align="left">Interpolating data</td>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
165
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
166 <td> </td>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
167
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
168 <td align="right">Data gap filling</td>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
169
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
170 <td align="right" width="20"><a href=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
171 "gapfill.html"><img src="b_next.gif" border="0" align=
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
172 "bottom" alt="Data gap filling"></a></td>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
173 </tr>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
174 </table><br>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
175
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
176 <p class="copy">©LTP Team</p>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
177 </body>
|
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff
changeset
|
178 </html>
|