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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 3.2 Final//FR"><!-- Converted with LaTeX2HTML 95.1 (Fri Jan 20 1995) --><!-- by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --><!-- Modified Simulog 03/97 --><HTML><HEAD><TITLE>2 The MODULEF library</TITLE><LINK REL=STYLESHEET TYPE="text/css"	HREF="./Modulef.css" TITLE="Modulef CSS"><meta name="description" value="2 The MODULEF library"><meta name="keywords" value="Guide1"><meta name="resource-type" value="document"><meta name="distribution" value="global"></HEAD><BODY BGCOLOR="#FFFFFF"><P> <IMG SRC="../icons/smallmod.gif" WIDTH=211 HEIGHT=50 ALIGN=BOTTOM	ALT="Modulef"><A NAME=tex2html322 HREF="node9.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif"	ALT="previous"></A><A NAME=tex2html326 HREF="node4.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif"	ALT="up"></A><A NAME=tex2html328 HREF="node11.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif"	ALT="next"></A><A NAME=tex2html330 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif"	ALT="contents"></A><A HREF="../Guide1-18/node10.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM	ALT="[BIG]"></A><A HREF="../Guide1-14/node10.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM	ALT="[Normal]"></A><A HREF="../Guide1-10/node10.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM	ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html329 HREF="node11.html">2.1 Capabilities</A><B>Up: </B> <A NAME=tex2html327 HREF="node4.html">Part I: The MODULEF Club</A><B> Prev: </B> <A NAME=tex2html323 HREF="node9.html">1.4 Objectives of the club</A><B><A HREF="node2.html"	>Contents</A></B><HR SIZE=3 WIDTH="75&#37;"><H1><A NAME=SECTION03200000000000000000>2 The MODULEF library</A></H1><P><P><BR><HR><P><P>The MODULEF library contains about 3000 procedures written in Fortran 77.  These procedures were designed with the utmost concern for software portability <BR>[4] [<A HREF="node65.html#guide_2"><A NAME=tex2html35 HREF="../Guide2/welcome.html">MODULEF User Guide - 2</A></A>].<P>The approach used in building the library of procedures is a combination of abstract approach and modular programming. By implementing a top-down design, mathematical formulations are split into  successive operators.Many of these operators are already present in the MODULEF library and new mathematical operators are incorporatedinto the library as computational modules. In this manner the solutions of new problems can easily be incorporated.<P>A module is a set of procedures performing one logical process or calculation step. The modules  communicate witheach other through data structures (D.S.), where a data structure [<A HREF="node65.html#guide_2"><A NAME=tex2html35 HREF="../Guide2/welcome.html">MODULEF User Guide - 2</A></A>] is a set of arrays containing the result corresponding to a computational step. Therefore, a module transforms an input data structure (I.D.S.) intoan output data structure (O.D.S.). For example,<P><TABLE COLS=3><COL ALIGN=LEFT><COL ALIGN=CENTER><COL ALIGN=LEFT><TR><TD VALIGN=BASELINE ALIGN=LEFT NOWRAP><TABLE COLS=3><COL ALIGN=RIGHT><COL ALIGN=CENTER><COL ALIGN=JUSTIFY WIDTH="4cm"><TR><TD VALIGN=BASELINE ALIGN=RIGHT NOWRAP>TAE (I.D.S.) </TD><TD VALIGN=BASELINE ALIGN=CENTER NOWRAP> : </TD><TD VALIGN=BASELINE ALIGN=LEFT WIDTH="113"> element vectors </TD></TR><TR><TD VALIGN=BASELINE ALIGN=RIGHT NOWRAP> NDL1 (I.D.S.) </TD><TD VALIGN=BASELINE ALIGN=CENTER NOWRAP> : </TD><TD VALIGN=BASELINE ALIGN=LEFT WIDTH="113"> list  of degrees of freedom </TD></TR><TR><TD VALIGN=BASELINE ALIGN=RIGHT NOWRAP> ASEMBV (module) </TD><TD VALIGN=BASELINE ALIGN=CENTER NOWRAP> : </TD><TD VALIGN=BASELINE ALIGN=LEFT WIDTH="113"> assembly of the element vectors into the global vector </TD></TR><TR><TD VALIGN=BASELINE ALIGN=RIGHT NOWRAP> B (O.D.S.) </TD><TD VALIGN=BASELINE ALIGN=CENTER NOWRAP> : </TD><TD VALIGN=BASELINE ALIGN=LEFT WIDTH="113"> resulting global vector </TD></TR></TABLE></TD><TD VALIGN=BASELINE ALIGN=CENTER NOWRAP>  </TD><TD VALIGN=BASELINE ALIGN=LEFT NOWRAP>     <P><IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img2.gif"><P></TD></TR></TABLE><P><P><P><BR> <HR><UL> <LI> <A NAME=tex2html331 HREF="node11.html#SECTION03210000000000000000">2.1 Capabilities</A><LI> <A NAME=tex2html332 HREF="node12.html#SECTION03220000000000000000">2.2 The MODULEF code</A></UL><HR SIZE=3 WIDTH="75&#37;"><IMG SRC="../icons/smallmod.gif" WIDTH=211 HEIGHT=50 ALIGN=BOTTOM	ALT="Modulef"><A NAME=tex2html322 HREF="node9.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif"	ALT="previous"></A><A NAME=tex2html326 HREF="node4.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif"	ALT="up"></A><A NAME=tex2html328 HREF="node11.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif"	ALT="next"></A><A NAME=tex2html330 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif"	ALT="contents"></A><A HREF="../Guide1-18/node10.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM	ALT="[BIG]"></A><A HREF="../Guide1-14/node10.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM	ALT="[Normal]"></A><A HREF="../Guide1-10/node10.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM	ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html329 HREF="node11.html">2.1 Capabilities</A><B>Up: </B> <A NAME=tex2html327 HREF="node4.html">Part I: The MODULEF Club</A><B> Prev: </B> <A NAME=tex2html323 HREF="node9.html">1.4 Objectives of the club</A><B><A HREF="node2.html"	>Contents</A></B><BR> <HR><P><ADDRESS></ADDRESS></BODY></HTML>
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