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1<html>
2<head>
3   <META NAME="Author" CONTENT="Brian H. Toby">
4   <title>EXPGUI</title>
5   <meta name="keywords" content="crystallography, Rietveld, diffraction,
6   GSAS, EXPGUI">
7</HEAD>
8<style>
9A:link {text-decoration:none}
10A:vlink {text-decoration:none}
11</style>
12
13<BODY BGCOLOR="#FFFFFF"
14      topmargin="0" leftmargin="0" marginwidth="0" marginheight="0" 
15      text="#000000" link="#0033ff" vlink="#0033ff" alink="#0033ff">
16
17<?
18   include("/var/www/include/navigation.inc");
19   include("/var/www/include/utility.inc");
20?>
21<blockquote><font face="arial, helvetica, sans-serif">
22
23<center><h1>
24<HR noshade width="75%" size="2" align="center">
25EXPGUI<BR>
26A Graphical User Interface for
27<A Href="http://www.ncnr.nist.gov/programs/crystallography/software/gsas.html">
28GSAS</A>
29<HR noshade width="75%" size="2" align="center">
30</h1></center>
31<P><P>
32<I><B>
33<blockquote>
34Note that the current EXPGUI release is intended to work with the
35current GSAS release. [EXPGUI v1.47 or later requires GSAS from Oct 2001
36(or later) for all features to work as described].
37</blockquote>
38</I></B>
39<P><P>
40EXPGUI is a graphical interface for the
41Los Alamos
42<A Href="http://www.ncnr.nist.gov/programs/crystallography/software/gsas.html">
43GSAS</A> package.
44EXPGUI does two things:
45it can be used to directly modify the GSAS
46experiment file with a graphical user interface (GUI) and
47it can be used to invoke the programs inside the
48GSAS package such as EXPEDT, GENLES, FOURIER...
49These programs can be run from a menu or in many cases by pressing buttons.
50EXPGUI is written using the
51<A href="#tcltk">Tcl/Tk</A> scripting language.
52<P>
53This web page describes the different actions that
54can be accomplished with the different panes and the
55contents of the menus. The table below contains links to the other
56web accessible documentation.
57<P>
58<TABLE BORDER BGCOLOR="#FFFF40" ALIGN=CENTER>
59<TR><TH BGCOLOR="#F0F0F0" rowspan=3>GUI Sections</TH>
60<TH><A Href="expgui1.html">Least Squares</A></TH>
61<TH><A Href="expgui2.html">Phase info</A></TH>
62<TH><A Href="expgui3.html">Histogram info</A></TH>
63</TR>
64<TR>
65<TH><A Href="expgui4.html">Scaling info</A></TH>
66<TH><A Href="expgui5.html">Profile terms</A></TH>
67<TH><A Href="expgui6.html">Constraints</A></TH>
68</TR>
69<TR>
70<TH><A Href="expgui7.html">Preferred Orientation</A></TH>
71<TH><A Href="expguic.html">Menus</A></TH>
72<TH>&nbsp;</TH>
73</TR>
74<TR><TH BGCOLOR="#F0F0F0">Utilities:</TH>
75<TH><A Href="liveplot.html">LIVEPLOT</A></TH>
76<TH><A Href="liveplot.html">BKGEDIT</A></TH>
77<TH><A Href="excledt.html">EXCLEDT</A></TH>
78</TR>
79<TR><TH BGCOLOR="#F0F0F0">Installation Notes:</TH>
80<TH><A Href="expgui_Unix_readme.html">Unix</A></TH>
81<TH><A Href="expgui_Win_readme.html">Windows</A></TH>
82<TH><A Href="expgui_cfg.html">Customization</A></TH>
83</TR>
84<TR><TH BGCOLOR="#F0F0F0">Tutorials:</TH>
85<TH><A Href="http://www.ncnr.nist.gov/xtal/software/expgui/tutorial1/index.html">TOF</A></TH>
86<TH><A Href="http://www.ncnr.nist.gov/xtal/software/expgui/tutorial2/index.html">CW Neutron</A></TH>
87<TH>&nbsp;</TH>
88</TR>
89<TR><TH BGCOLOR="#F0F0F0">Messages:</TH>
90<TH><A Href="expguierr.html#Error">Error</A></TH>
91<TH><A Href="expguierr.html#Warn">Warning</A></TH>
92<TH><A Href="expguierr.html#Info">Informational</A></TH>
93</TR>
94<TR><TH BGCOLOR="#F0F0F0">Other:</TH>
95<TH><A Href="expgui_intro.html">Introduction</A></TH>
96<TH><A Href="wishlist.html">Recent & Planned<BR>Improvements</A></TH>
97<TH><A Href="http://www.ncnr.nist.gov/xtal/software/EXPGUI_reprint.pdf">
98<I>J. Appl. Cryst.</i><BR>article</A></TH>
99</TR>
100</TABLE><BR CLEAR=ALL>
101<P>
102<B>Citations.</B>
103The appropriate citations to be used for GSAS and EXPGUI are:
104<UL>
105<LI>
106A.C. Larson and R.B. Von Dreele, "General Structure Analysis System (GSAS)",
107Los Alamos National Laboratory Report LAUR 86-748 (2000).
108<A HREF="ftp://ftp.lanl.gov/public/gsas/manual/GSASManual.pdf">
109[link to PDF file at Los Alamos ftp server]
110</A>
111<LI>
112B. H. Toby, <i>EXPGUI</i>, a graphical user interface for <i>GSAS</i>,
113<i>J. Appl. Cryst.</i> <b>34</b>, 210-213 (2001).
114<A HREF="http://www.ncnr.nist.gov/xtal/software/EXPGUI_reprint.pdf">
115[link to PDF file]
116</A>
117</UL>
118<P>
119<B>Mailing List.</B>
120If you would like to get news about about new features
121& bug fixes in EXPGUI and also support
122the project by demonstrating how many people use it,
123please send e-mail to
124<a href="mailto:brian.toby@nist.gov?subject=EXPGUI Mailing List">Brian.Toby@NIST.GOV</a>.
125<P>
126<hr>
127
128<h2>A. Experiment file editing</h2>
129<P>
130<DL><DL>
131When an experiment (.EXP) file is read, a copy is made in local
132computer memory. In most cases, values are changed in this
133"in memory" copy of the experiment file
134as this information is changed by the user on the screen.
135<img SRC="rederror.gif" align=LEFT BORDER=3 alt="EXPGUI Screen snapshot">
136<IMG SRC="new.gif" HEIGHT=13 WIDTH=36 alt="New!">
137If there is an error in the typed value, (for example if "1..0" is typed, or
138"1.5" is typed where an integer is expected), these values are
139not saved. In this case, the text is turned red, to indicate
140that an error is present, as shown in the figure to the left, where "90.000x"
141has been entered for alpha.
142The edited version of the experiment file is written back out to
143disk when the "File/Save" or "File/Save as"
144<A Href="expguic.html#1">menu bar options</A>
145are used. The File/Save operation is done automatically before any GSAS
146programs, such as GENLES or EXPEDT, are run.
147<P>
148
149Since the GSAS experiment file is quite complex,
150values are grouped together by function, approximately
151following the outline of the EXPEDT program.
152Each set of values is given a
153"tabbed pane" on a window that has the appearance of a notebook (see below).
154<center><B>
155<br>The notebook pane tabs.
156<br><img SRC="panebar1.gif"  BORDER=3 alt="EXPGUI Screen snapshot">
157</center></B>
158In some cases, where values are
159too numerous or complex to fit onto the notebook pane, one or more buttons
160may be present on a pane that will create a separate window,
161where the associated values can be modified.
162These values are not recorded in the
163"in memory" copy of the experiment file unless the "Save" button on this window
164is pressed. If "Cancel" is pressed, no changes are made.
165Each notebook pane is listed below with a link to the web page documenting
166that pane.
167
168<A Href="expgui1.html">
169<h3>A.1 Least Squares (LS) Controls Pane</h3>
170</A><A Href="expgui2.html">
171<h3>A.2 Phase Pane</h3> 
172</A><A Href="expgui3.html">
173<h3>A.3 Histogram pane</h3> 
174</A><A Href="expgui4.html">
175<h3>A.4 Scaling pane</h3> 
176</A><A Href="expgui5.html">
177<h3>A.5 Profile pane</h3> 
178</A><A Href="expgui6.html">
179<h3>A.6 Constraints pane</h3>
180</A><A Href="expgui7.html">
181<h3>A.7 Preferential Orientation Pane</h3>
182</A>
183<br clear=all>
184</DL></DL>
185<h2>B. Shortcuts</h2></a>
186<a name="multiplehistogram">
187<h3>B.1 Multiple Histogram Selection</h3></a>
188<DL><DL>
189This mode allows parameters to be changed for groups of
190histograms.
191When the "Multiple Histogram Selection" mode is off,
192it is possible to modify parameters
193and refinement flags for only a single histogram, but
194the other settings allow groups of histograms
195to be selected and modified.
196<A href="#mouseactions">(see Mouse Actions)</A>.
197<P>
198It does not make sense, however, to globally modify
199instrument-related parameters and flags for different
200histogram types.
201So global actions can be limited to a single class
202of histogram types (e.g. TOF, CW Neutron,...), which
203allows these parameters to be set for groups of
204similar histograms. Thus, if this mode is set to "All"
205the Histogram and Profile panes are disabled.
206<P>
207The setting for "Multiple Histogram Selection" mode is
208displayed above each histogram selection box and is
209selected using the "Multiple Hist. Selection" item on the
210Options menu to create a submenu or by clicking on the display.
211Note that another option in this "Multiple Hist. Selection"
212submenu is an option "Group Phases Together" that controls how
213EXPGUI treats phases having
214the same profile type that is used when multiple histograms are selected. If
215the "Group Phases Together" option is on, then the refinement flags for
216all phases with the same histogram types are grouped together, when possible.
217If this option is off, phases are treated separately.
218<IMG SRC="new.gif" HEIGHT=13 WIDTH=36 alt="New!">
219If the left mouse button is used to click on the selection mode display,
220the mode is cycled between the available modes. If the right mouse
221button is used, the mode is reset, to disable multiple histogram selection.
222<p>
223<a name="mouseactions">
224</DL></DL>
225<h3>B.2 Mouse Actions</h3></a>
226<DL><DL>
227A range of atoms or (in multiple selection mode) histograms may be
228selected by dragging (holding down) the left mouse button. It is also
229possible to select a range by using the Shift key with the left mouse
230button. To select or deselect individual entries, use the Control key
231with the left mouse button. Pressing the right mouse button selects all
232entries in a list.
233</DL></DL>
234
235<h2>C. Menu Commands and Programs</h2>
236<p>
237GSAS programs are invoked either through use of the menu bar
238<center><B>
239<br>The menu bar.
240<br><img SRC="menubar.gif" BORDER=3 alt="EXPGUI Screen snapshot">
241</center></B>
242or by "pressing" a button on the button bar. The button bar
243simply provides an easy way to access commonly used
244actions on the menu bar. Users can
245<A HREF="expgui_cfg.html">
246configure the menu bar</A> to include their own preferred actions and, with
247some knowledge of the program and Tcl/Tk,
248add their own commands to the menu bar or button bar.
249
250<center><B>
251<br>The button bar.
252<br><img SRC="buttonbar.gif" BORDER=3 alt="EXPGUI Screen snapshot">
253</center></B>
254
255<h3>Invoking of GSAS programs</h3>
256When GSAS programs are invoked, in most cases EXPGUI is suspended while
257the GSAS program is run in a terminal (or DOS) window. When the terminal
258window is closed, EXPGUI is restarted. If desired (see the
259<A Href="expguic.html#Autoicon">
260"Iconify during GSAS"</A>
261option) while this occurs, EXPGUI can be made into an icon
262to save screen space.
263<P>
264<img src="powpref4a.gif" align=left>
265Once the GSAS program has finished, if the program has modified
266the .EXP file,
267<a Href="expguierr.html#Overwrite">
268"File has been modified..."</a>message box
269similar to the one to the left is displayed (also see the more complete
270discussion on the <a Href="expguierr.html#Overwrite">messages page</A>.
271Note that this message can be avoided if the
272<A Href="expguic.html#Autoupdate">
273"Autoload EXP"</A>
274option is used.
275<BR clear=all>
276<P>
277Note that in both Windows-95 and Windows-NT, a file named <tt>EXPGUI.LCK</tt>
278is created while the GSAS program runs. The presence of this file is used
279to suspend the LIVEPLOT program, since LIVEPLOT has sometimes crashed
280when run at the same time as GENLES (no such problem has been seen in Unix).
281This file is deleted when the GSAS program completes.
282<P>
283<img src="lock.gif" align=left>
284In Windows-9x, the <a Href="expgui_Win_readme.html#Winexec">Winexec</a>
285package is used to execute a command that creates a DOS window.
286The GSAS programs are then run by a batch file in this DOS window.
287Due to limitations in Tcl/Tk & Windows, the DOS window runs independently
288of EXPGUI, so the lock file (<tt>EXPGUI.LCK</tt>) is also used to suspend
289EXPGUI. While EXPGUI is waiting, the
290<a Href="expguierr.html#lock">
291Please wait...
292</a>
293window shown to the left is displayed. When the GSAS program completes, the
294lock file is deleted, the window automatically disappears and EXPGUI resumes.
295Should a problem arise where the file is not deleted, EXPGUI can be resumed by
296pressing the "Continue" button.
297
298<BR clear=all>
299<h3>GSAS menus</h3>
300
301A description of the EXPGUI menus follows. Use the links to obtain
302more information, including a very
303brief description of the function of each menu option.
304Note that an option may appear under more than one menu.
305
306<DL><DL>
307
308<A Href="expguic.html#1">
309<H3>C.1 File Menu</H3>
310</A>
311<DL><DL>
312The options on the File menu as is the custom contains the commands
313for reading and writing experiment files, as well as starting
314and ending the program.
315</DL></DL>
316
317<A Href="expguic.html#2">
318<h3>C.2 Options Menu</h3>
319</A>
320<DL><DL>
321This menu contains options that determine how EXPGUI runs.
322</DL></DL>
323
324<A Href="expguic.html#3">
325<h3>C.3 Powder Menu</h3>
326</A>
327<DL><DL>
328This menu contains links to GSAS programs used for powder diffraction
329analysis.
330</DL></DL>
331
332<A Href="expguic.html#4">
333<h3>C.4 Single Crystal Menu</h3>
334</A>
335<DL><DL>
336This menu contains links to GSAS programs used for
337single-crystal diffraction analysis.
338</DL></DL>
339
340<A Href="expguic.html#5">
341<h3>C.5 Graphics Menu</h3>
342</A>
343<DL><DL>
344This menu contains links to several GSAS and
345two non-GSAS (LIVEPLOT and WIDPLT)
346programs used for graphical display of data and results.
347</DL></DL>
348
349<A Href="expguic.html#6">
350<h3>C.6 Results Menu</h3>
351</A>
352<DL><DL>
353This menu contains links to several GSAS and
354one non-GSAS (LSTVIEW)
355programs used for analysis of results.
356</DL></DL>
357
358<A Href="expguic.html#7">
359<h3>C.7 Calculations Menu</h3>
360</A>
361<DL><DL>
362This menu contains programs for useful crystallographic computations.
363</DL></DL>
364
365<A Href="expguic.html#8">
366<h3>C.8 Import/Export Menu</h3>
367</A>
368<DL><DL>
369This menu contains utilities for importing information into GSAS and
370exporting.
371</DL></DL>
372</DL></DL>
373
374<h2>D. EXPGUI Utility Programs</h2></a>
375
376<br clear=all>
377<H3>D.1 LSTVIEW</H3>
378
379<DL><DL>
380LSTVIEW is used to browse through the GSAS output listing. It is
381invoked by the "lstview" command in the GUI.
382<CENTER><IMG SRC="textview.gif" alt="EXPGUI Screen snapshot"></CENTER>
383</DL></DL>
384
385<br clear=all>
386<H3>D.2 LIVEPLOT</H3>
387<DL><DL>
388LIVEPLOT shows the observed, calculated and difference plots for powder
389refinements. The plot is updated as the refinement progresses. The mouse can
390be used to zoom in on sections of the plot.
391LIVEPLOT uses the <A href="#blt">BLT</A> graphics package.
392<CENTER><IMG SRC="liveplot.gif" alt="EXPGUI Screen snapshot"></CENTER>
393<IMG SRC="new.gif" HEIGHT=13 WIDTH=36 alt="New!">
394LIVEPLOT can now be enhanced to superimpose peak locations for
395input unit cells or peaks from JCPDS/ICDD entries.
396See the <A HREF="liveplot.html#customize">
397LIVEPLOT customization information</A> 
398or read file <tt>expgui_cfg.html</tt> in the <tt>gsas/tcl/doc</tt> directory.
399<P>
400</DL></DL>
401
402<br clear=all>
403<H3>D.3 WIDPLT</H3>
404<DL><DL>
405WIDPLT can be used to plot the actual peak widths generated by the profile
406parameters used in GSAS.
407It is possible to define reference curves
408that are loaded automatically.
409WIDPLT uses the <A href="#blt">BLT</A> graphics package.
410<CENTER><IMG SRC="widplt.gif" alt="EXPGUI Screen snapshot"></CENTER>
411</DL></DL>
412
413<br clear=all>
414<a name="ConvertUnix"></a>
415<a name="ConvertWin"></a>
416<h3>D.4 File Conversions</h3> 
417<DL><DL>
418<P>
419GSAS data, experiment and instrument parameter files are
420expected to have a format with exactly 80 characters per line followed
421by a carriage return and then a linefeed (82 characters total per line).
422Files in this format can be read in "Direct Access" mode.
423Recent versions of GSAS will attempt to detect and repair files that
424are not in this format, but if the file is incorrectly formatted and
425by chance the length of the file is divisible by 82, the problem in the
426file format will not be detected.
427The Convert menu
428in can be used to convert files into the correct format.
429The original version of the
430file is retained and renamed.
431<P>
432</DL></DL>
433
434<br clear=all>
435<a name="Composition"></a>
436<h3>D.5 Compute Composition</h3> 
437<DL><DL>
438The composition box shows the unit cell and asymmetric unit composition
439for all phases in a material. Site multiplicities and occupancies are
440taken into account.
441</DL></DL>
442
443<br clear=all>
444<a name="ExportMSI"></a>
445<h3>D.6 Export coordinates in MSI .xtl format</h3> 
446<DL><DL>
447The Export/exp2xtl routine writes a .xtl file, as is used in Insight-II and
448Cerius2 (Molecular Simulations, Inc.). Note that space groups are not named
449exactly the same in the two programs and the origin may need to be specified
450as "origin 2", for space groups where the center of symmetry is not at the
451origin. It is up to the user to get things right.
452</DL></DL>
453
454<br clear=all>
455<a name="DeleteHistoryRecords"></a>
456<h3>D.7 Delete History Records</h3> 
457<DL><DL>
458Every time a GSAS program (including EXPGUI) is run, an entry is added to
459the "history records" in the .EXP file. After 999 entries have been written,
460no more can be added to the file. Further, reading large numbers of history
461records can slow the GSAS programs
462(this is less of a problem on faster computers). For these reasons, it may be
463a good idea to prune the older history records from the file. If more than 100
464history records are found in an experiment file, EXPGUI suggests that the
465older history entries be deleted. Alternately the File/EraseHistory command
466can be used to invoke the this option.
467<P>
468On the dialog the number of history records to be retained is specified.
469Also, after records have been deleted, the remaining records can be renumbered
470starting with 1, so that the 999 record limit is not reached.
471</DL></DL>
472
473<A name=tcltk>
474<H2>
475<A Href="http://www.ncnr.nist.gov/programs/crystallography/software/tclpkgs.html">
476Tcl/Tk</A></H2>
477The
478<A Href="http://www.ncnr.nist.gov/programs/crystallography/software/tclpkgs.html">
479Tcl/Tk program</A> is a platform-independent scripting language that is
480used to implement most of EXPGUI. This software is available for free
481and must be loaded in order to use EXPGUI. See the
482installation notes for
483<A HREF="expgui_Win_readme.html">Windows</A>,
484and for
485<A HREF="expgui_Unix_readme.html">UNIX</A> for information on how to do this.
486While learning Tcl/Tk is a great thing to do, it is not a requirement
487for using or installing EXPGUI.
488
489<A name=winexec>
490<H3>
491WINEXEC</H3>
492<UL>
493The WINEXEC package is needed under Windows-95 and its offspring
494(-98 and -ME). See the <A HREF="expgui_Win_readme.html">Windows installation
495notes</A> for more details.
496</UL>
497
498<A name=blt>
499<H3>
500BLT Package</H3>
501<UL>
502The BLT graphics package is used by the WIDPLT, LIVEPLOT, BKGEDIT & 
503EXCLEDT routines. If the
504package can not be found by these routines, an error message,
505"Error -- Unable to load the BLT package", will be displayed. It is also
506possible for the package to be installed, but not configured properly.
507If this is the case, a message,
508"BLT Setup Error: could not access a Blt_ routine...", will be displayed.
509This is most common in UNIX and is discussed further in the
510<A HREF="expgui_Unix_readme.html">UNIX installation notes</A>. Also see
511<A HREF="http://www.ncnr.nist.gov/programs/crystallography/software/tclpkgs.html">
512http://www.ncnr.nist.gov/programs/crystallography/software/tclpkgs.html
513</A> for more information on installation of BLT.
514</UL>
515
516<A name=La>
517<H3>
518La (Linear Algebra) Package</H3>
519<UL>
520The
521<A HREF="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=www.hume.com">Hume
522</A>
523Linear Algebra Tcl Package,
524<A HREF="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=www.hume.com">
525La</A>,
526is used by the BKGEDIT
527routine to perform least-squares fitting. If the
528package can not be found, the routine cannot run.
529If the package cannot be found, a message,
530"Error -- Unable to load the La package" will be displayed. This
531should not happen, since the package is included with the EXPGUI files.
532So if get this error you probably have an incomplete installation.
533Note that the La package requires Tcl/Tk version 8.1 or higher, so that if
534you are using an older version of Tcl/Tk, you will need to upgrade.
535See the installation instructions for
536<A HREF="expgui_Win_readme.html">Windows</A>,
537and for
538<A HREF="expgui_Unix_readme.html">UNIX</A> for more information on Tcl/Tk.
539</UL>
540
541<H2>
542Acknowledgments</H2>
543Praise to Larson and
544<A HREF="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://lansce.lanl.gov/lujan/staff12/vondreele.htm">
545Von Dreele</A> for GSAS, <A HREF="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.scriptics.com/">Ousterhout</A>
546for Tcl/Tk,
547Przemek Klosowski</A>
548for convincing me to learn Tcl/Tk
549and Jonathan Wasserman for helping get this project started.
550Thanks also to
551Pamela Whitfield of the NRC (Canada) for writing large
552sections of the
553<A Href="expgui7.html">Preferential Orientation Pane</A>
554and the
555<A Href="expgui6.html">Profile Constraints pane</A>
556code.
557<P>
558<A Href="http://www.ncnr.nist.gov/programs/crystallography/software/gsas.html">
559GSAS</A>
560is written by Allen C. Larson and <A HREF="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://lansce.lanl.gov/lujan/staff12/vondreele.htm">
561Robert B. Von Dreele</A>, MS-H805,
562Los Alamos National Laboratory, Los Alamos, NM 87545. Problems, questions
563or kudos concerning GSAS should be sent to Robert B. Von Dreele at
564<A HREF="MAILTO:vondreele@lanl.gov">vondreele@lanl.gov</A>
565EXPGUI is written by Brian H. Toby of the NIST Center for Neutron Research,
566<A HREF="MAILTO:Brian.Toby@NIST.GOV">Brian.Toby@NIST.GOV</A> 
567with help from Jonathan Wasserman.
568
569<P><hr><blockquote>
570<P>GSAS is Copyright, 1984-2000, by
571the Regents of the University of California.
572The GSAS software was produced under a U.S. Government contract (W-7405-ENG-36)
573by the Los Alamos National Laboratory, which is operated by the University
574of California for the U.S. Department of Energy. The U.S. Government is
575licensed to use, reproduce, and distribute this software. Permission is
576granted to the public to copy and use this software without charge, provided
577that this notice and any statement of authorship are reproduced on all
578copies. Neither the Government nor the University makes any warranty, express
579or implied, or assumes any liability or responsibility for the use of this
580software.
581
582<P>The author of EXPGUI is a U.S. Government employee which means that
583EXPGUI is not subject to copyright. Have fun with it. Modify it. Please write
584new sections and make them available to the rest of the world.
585
586<p>Neither the U.S. Government nor any author makes any warranty,
587expressed or implied, or assumes any liability or responsibility
588for the use of this information or the software described
589here. Brand names cited herein are used for
590identification purposes and do not constitute an endorsement by NIST.
591</blockquote>
592
593<p><hr><a href="http://www.ncnr.nist.gov/staff/toby/">Brian Toby</a> (<a href="mailto:brian.toby@nist.gov">Brian.Toby@NIST.GOV</a>)
594<br>
595$Revision: 503 $ $Date: 2009-12-04 23:07:15 +0000 (Fri, 04 Dec 2009) $
596</blockquote>
597</body>
598</html>
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