Mike, Abstract received - thanks for that. Please submit your paper by close-of-play (in some convenient time zone) Thursday 15th Dec.

Cheers Shaun

##################################################################### Dr Shaun Forth Applied Mathematics & Operational Research Engineering Systems Department Cranfield University, Shrivenham Campus Swindon SN6 8LA, England tel.: +44 (0)1793 785311 fax.: +44 (0)1793 784196 email: S.A.Forth@cranfield.ac.uk http://www.amorg.co.uk http://www.amorg.co.uk/ http://www.rmcs.cranfield.ac.uk/amor #####################################################################

-----Original Message----- From: org-ad-workshop-bounces@lists.rwth-aachen.de [mailto:org-ad-workshop-bounces@lists.rwth-aachen.de] On Behalf Of Christian Bischof Sent: Wednesday, December 14, 2005 3:06 PM To: Organizers AD Workshop Subject: [Org-ad-workshop] [Fwd: Fagan Abstract for ICCS submission]

-------- Original Message -------- Subject: Fagan Abstract for ICCS submission Date: Wed, 14 Dec 2005 08:59:55 -0600 From: Mike Fagan mfagan@cs.rice.edu mailto:mfagan@cs.rice.edu Reply-To: mfagan@cs.rice.edu To: Jean Utke utke@mcs.anl.gov mailto:utke@mcs.anl.gov , Christian Bischof bischof@rz.rwth-aachen.de mailto:bischof@rz.rwth-aachen.de

Jean and Chris, Below is a short title+abstract for my ICCS submission. I will supply full paper late tomorrow (15 Dec 05). Thanks for your patience. Best, Mike P.S. Would 1 of you please email me when you get this? I have gotten a little paranoid about Rice email. TIA --------------- Fagan Title+Abstract for ICCS 2006 Submission --------- Title: Derivatives by address for Fortran 77 Abstract: Automatic differentiation tools use 1 of 2 strategies to access derivative values. These strategies are: 1) By-address 2) By-name The by-address method is typically implemented by introducing structured types for each active scalar type. For example, scalar type 'real' will have an associated structure type 'active-real'. Using this strategy, all active variables types are changed to the associated structured type. On the other hand, the by-name method introduces an associated new variable for each active variable. For example, the derivatives associated with 'pressure' would be 'd_pressure'. Since the by-address strategy employs structured types, AD tools for Fortran 77 have not employed that strategy. In this paper, we show how to use array access to implement the by-address strategy for Fortran 77. We discuss the canonicalization issues, outline our Adifor3.0 implementation of this technique, and give a few sample performance comparisons of the by-address vs the standard Adifor3.0 by-name.

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Prof. Christian Bischof, Ph.D.

Institute for Scientific Computing and Center for Computing and Communications

RWTH Aachen University

Seffenter Weg 23, 52074 Aachen, Germany

Tel. +49-241-8029110, Fax +49-241-8022241

bischof@rz.rwth-aachen.de mailto:bischof@rz.rwth-aachen.de , www.sc.rwth-aachen.de http://www.sc.rwth-aachen.de/ , www.rz.rwth-aachen.de http://www.rz.rwth-aachen.de/