Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!simulation From: simulation@uflorida.cis.ufl.edu (Moderator: Paul Fishwick) Newsgroups: comp.simulation Subject: SIMULATION DIGEST V10 N9 Message-ID: <20825@uflorida.cis.ufl.EDU> Date: 5 Sep 89 13:45:35 GMT Sender: fishwick@uflorida.cis.ufl.EDU Reply-To: simulation@uflorida.cis.ufl.edu Lines: 519 Approved: fishwick@uflorida.cis.ufl.edu Volume: 10, Issue: 9, Tue Sep 5 09:45:03 EDT 1989 +----------------+ | TODAY'S TOPICS | +----------------+ (1) Call for Papers: Dynamic Modelling of Information Systems (2) Concerning the State of System Dynamics (3) Call for Papers: International System Dynamics Conference (4) Looking for a Copy of SAAM (Compartmental Modeling) (5) Software for Wassily Leontief Methods * Moderator: Paul Fishwick, Univ. of Florida * Send topical mail to: simulation@bikini.cis.ufl.edu OR post to comp.simulation via USENET * Archives available via FTP to bikini.cis.ufl.edu, login as 'anonymous', use your last name as the password, change directory to pub/simdigest. * Simulation Tools available by doing above and changing the directory to pub/simdigest/tools. ----------------------------------------------------------------------------- Organisation: Delft University of Technology, Delft The Netherlands. To: comp-simulation%hp4nl@uunet.UU.NET Path: dutrun!winfave From: dutrun!winfave@uunet.UU.NET (Alexander Verbraeck) Newsgroups: comp.simulation Subject: Call for papers: Dynamic Modelling of Information Systems Date: 3 Sep 89 00:42:16 GMT Reply-To: dutrun!winfave@uunet.UU.NET (A.Verbraeck) Distribution: world Organization: Delft University of Technology, The Netherlands FIRST CALL FOR PAPERS INTERNATIONAL WORKING CONFERENCE ON DYNAMIC MODELLING OF INFORMATION SYSTEMS Sponsored by NFI Organised by Delft University of Technology Department of Information Systems To be held in Noordwijkerhout, The Netherlands April 9th and 10th 1990 ------------------------------------------------------------------------ DYNAMIC MODELLING OF INFORMATION SYSTEMS In Information System Design, various models of the situation that is studied are constructed. In the first phase of the process, these models are used to ANALYZE the current situation, in order to reach a better understanding. Eventually, the emphasis of the modelling process will turn to the DESIGN of solutions for the problems perceived, and will result in a choice for and implementation of one of these alternative solutions. Information systems should never be considered as a goal in themselves, but should be seen as a means that enables management to improve the achievements of information workers, or the effective use of other resources. This implies that in order to be able to use information systems effectively, there should be a clear understanding of the problems information workers have, and the support that they need in order to perform their tasks. Especially in areas, where the studied system is complex and hard to understand, DYNAMIC MODELLING of the current situation is of crucial importance. Without a good understanding of the system in its dynamic appearance, the designer will not be able to devise the right solutions. Also this understanding is necessary to evaluate the effectiveness of different solutions to be able to make a rational choice. As information technology is introduced in more complex and less well described areas, like office systems and decision support, the need for powerful modelling techniques is increasing. Techniques like interactive and animated simulation, executable specifications, prototyping and object oriented specification are seen as potential candidates for supporting these complex modelling processes. This international working conference is intended to join the people who are active in this area. By sharing experiences and ideas in workshop setting, the conference should lead to an overall understanding of the state of the art in this area today, and the research agenda that we should be attacking in the years to come. ------------------------------------------------------------------------ HOW TO SUBMIT If you wish to participate in the conference, please fill out the attached form. If you intend to submit a paper, please give the (provisional) title as well. Four copies of an extended abstracts of at least 2000 words should be sent to: prof.dr. H.G. Sol Delft University of Technology Department of Information Systems P.O.Box 356 2600 AJ Delft The Netherlands or a single copy by E-mail to: WINFSOL @ HDETUD1 (BITNET/EARN) These abstracts should be in by November 15th 1989. A notification of acceptance will be sent in December 1989. Final copies are due on March 1st 1990. The papers will be included in conference proceedings only after oral presentation. ORGANIZATION Conference Chairmen H.G. Sol K.M. van Hee Program Committee G.B. Davis K.M. van Hee H.G. Sol R.H. Sprague Jr. Organizing Committee R.C.J. Dur H.G. Sol A. Verbraeck T.F. Verhoef F.W. Wierda Delft University of Technology Department of Information Systems P.O.Box 356 2600 AJ Delft The Netherlands E-mail: WINFSOL at HDETUD1 (BITNET/EARN) ------------------------------------------------------------------------ IMPORTANT DATES Extended abstracts (at least 2000 words) November 15th 1989 Notification of acceptance December 1989 Camera ready copies due March 1st 1990 Conference April 9th and 10th 1990 ------------------------------------------------------------------------ FORM TO FILL IN I want to participate in the conference on Dynamic Modelling of Information Systems, April 9th and 10th 1990 in Noordwijkerhout, The Netherlands (y/n): I intend to present a paper (y/n): Provisional title of this paper: Last Name: Initials: Organisation: Address (home/business): Address: Postal/zip code: City: Country: Province/state: E-mail: Phone: Fax: Telex: Send this form to : WINFSOL @ HDETUD1 (BITNET/EARN) --------------------------------------------------------------------- --------------------------------------------------------------------- Alexander Verbraeck e-mail: Delft University of Technology winfave@hdetud1.bitnet Department of Information Systems winfave@dutrun.uucp PO Box 356, 2600 AJ The Netherlands --------------------------------------------------------------------- ------------------------------ Date: Sun, 3 Sep 89 07:50 EDT From: Subject: state of system dynamics To: fishwick@fish.cis.ufl.edu X-Original-To: fishwick@fish.cis.ufl.edu CONCERNING THE STATE OF SYSTEM DYNAMICS The field of system dynamics is alive and well and growing slowly. This note sketches some of its current situation and ends with a list of sources of more information. System dynamics practitioners apply computer simulation and a perspective based on information feedback and circular causality to dynamic problems. Their purpose is understanding, policy analysis, and policy design in complex systems. To those ends, they build formal simulation models that capture the structure of systems at the level of the aggregate behavior of real actors. They focus on information available to actors in the system, pressures and incentives continuously acting upon them, and actions available to them. The models that result are capable of exhibiting the endogenous dynamics of a system and the implications of policy changes. Of particular interest is the tendency of system dynamics models to expose a system's natural tendencies to compensate or counter imposed policy initiatives. Being nonlinear, system dynamics models also exhibit endogenous shifts in dominant structure, moving among several regimes or modes of behavior, including occasionally the newly recognized mode of deterministic chaos. The System Dynamics Society was formed in 1984 and now numbers more than 300 members world-wide. The journal of the Society, the System Dynamics Review, was created in 1985 and appears semi-annually. It now mails to just under 500 individuals and institutions, a number that has been growing about 8% or 9% per year since the journal's inception. The 1988 special double issue on chaos may be of special interest. The field has held annual international conferences for more than 15 years, the most recent of which were under the sponsorship of the Society and were held at Oslo, Keystone (Colorado), Seville, San Diego, Shanghai, and Stuttgart. The 1990 Conference will be in Boston, July 10-13. The call for papers should appear in this electronic newsletter. There are teaching and research programs in system dynamics at numerous colleges and universities in around the world, including M.I.T., SUNY- Albany, USC, Dartmouth, Notre Dame, American University (Washington DC), Instituto Tecnologico y de Estudios Superiores de Monterrey (Mexico), London Business School, University of Bradford, University of Bergen, Norwegian School of Business (Oslo), Technical University of Denmark, the Universities of Stuttgart, Seville and Milan, Asian Institute of Technology (Bangkok), Fudan University (Shanghai), Sharif Institute of Technology (Teheran), and many others. There are even some exciting initiatives in junior high and high schools (see the source list below for information). In the United States and Europe there are numerous consulting firms that employ the system dynamics approach to develop corporate understanding, forecast business environments, do strategic planning, or solve dynamic problems. Their clients include major oil companies, major chemical companies, the telephone companies, agencies of federal and state governments, insurance companies, major computing firms, and others. See the source list. The simulation languages currently employed by most practitioners include STELLA on the Macintosh, Professional Dynamo on IBM compatibles, Dysmap on IBM comatibles, various Dynamos on various mainframe computers. The icon-oriented model-building capabilities of STELLA have dramatically expanded the ranks of people who, knowing or not, are building system dynamics models. The manuals for STELLA (STELLA for Business, An Academic User's Guide to STELLA) are major contributions to the teaching literature in the field. Other important texts include Roberts et al., Introduction to Computer Simulation, a system dynamics approach (Addison-Wesley 1982), and Richardson & Pugh, Introduction to System Dynamics Modeling with Dynamo (MIT Press 1981). If you have further questions or want more information, I'd be happy to correspond with you. George P. Richardson Executive editor of the System Dynamics Review Associate professor of public administration and public policy The Rockefeller College of Public Affairs and Policy State University of New York at Albany Milne 308 - 135 Western Avenue Albany, NY 12222. Information sources for specific topics: The System Dynamics Society: Executive director, Julia S. Pugh, 49 Bedford Road, Lincoln, MA 01773. The System Dynamics Review: Executive editor, George P. Richardson, The Rockefeller College of Public Affairs and Policy, State University of New York at Albany, Milne 308 -135 Western Avenue, Albany, NY 12222. The 1990 International System Dynamics Conference, Boston, Massachusetts, July 10-13: Conference manager, Cathy Chazen Stone, The Rockefeller Institute of Government, 411 State Street, Albany, NY 12203. STELLA: Barry Richmond, High Performance Systems, Lyme, NH 03768 Professional DYNAMO: Alexander L. Pugh, Pugh-Roberts Associates, 5 Lee St., Cambridge, MA 01239 DYSMAP: Eric F. Wolstenholme, University of Bradford Management Centre, Emm Lane, Yorkshire BD9 4JL, UNITED KINGDOM A few system dynamics consulting groups: Pugh-Roberts Associates, 5 Lee St., Cambridge, MA 02139 Ventana Systems, Inc., 26 Landsdowne Street, Cambridge, MA 02139 Sandhill Systems, 289 Great Road, Acton, MA 01720 Federal Group, Inc., 950 Third Avenue, New York, NY 10022 Policy Assessment Corporation, 4343 Rustic Place, St. Paul, MN 55112 High Performance Systems, 13 Dartmouth College Highway, Lyme, NH 03768 System Dynamics Research and Consult, Amsterdam BV, Jacob Obrechtstraat 44, 1071 KN Amsterdam, THE NETHERLANDS Developments at M.I.T.: John D. Sterman, associate professor, Sloan School of Management, M.I.T., E52-562 - 50 Memorial Drive, Cambridge, MA 02139. Developments in school curricula: Barry Richmond, High Performance Systems, Lyme, NH 03768 Gordon Brown (emeritus Dean of engineering at MIT), P.O. Box 272, Grantham, NH 03753 Frank Draper, Orange Grove Junior High School, 1911 E. Orange Grove Rd., Tucson, AZ 85718 ------------------------------ Date: Sun, 3 Sep 89 07:57 EDT From: Subject: Call for papers To: fishwick@fish.cis.ufl.edu X-Original-To: fishwick@fish.cis.ufl.edu CALL FOR PAPERS 1990 International System Dynamics Conference Boston, Massachusetts, USA July 10-13, 1990 Objective The conference will bring together practitioners of system dynamics from business, government and academic organizations around the world to exchange ideas about theory, methods, and applications. Previous international system dynamics conferences have played an important role in the development of the field. The 1990 conference in Boston will follow in the same tradition, providing an opportunity for intense interchange on key issues. Format % Plenary sessions % Parallel sessions % Poster sessions % Tutorials and workshops % Displays and demonstrations % Open time for in-depth discussions % Meetings of the Society and its committees There will be opportunities for educators and vendors to set up permanent displays and software demonstrations during the conference. Write the conference manager for details. Topics % Corporate applications % Public policy % Economic planning and forecasting % Model analysis and optimization methods % Software tools % Deterministic chaos % Simulation gaming % Training and learning environments % Teaching tools and methods % Other developments in theory and applications Abstracts Selection of papers for parallel and poster sessions, tutorials, and workshops will be based on competitive abstracts. Plenary papers will be invited based upon abstracts and selected by peer review of final drafts. Abstracts should be approximately 250 words in length. Three copies of each abstract should be submitted by November 1, 1989 to: Cathy Chazen Stone International System Dynamics Conference Rockefeller Institute of Government 411 State Street Albany, NY 12203 (Phone 518-472-1300) Final Papers Final papers for accepted abstracts are due on April 15, 1990. Instructions for the format of final papers will be sent to the first author of each selected abstract in January, 1990. Plenary session papers will be selected on the basis on final papers only. No paper may appear in print before the conference. Proceedings Papers received by April 15 will be published in the Conference Proceedings and appear in the printed program. At least one author must register for the conference in order for a paper to appear in the Proceedings. Submission of a paper grants permission to the System Dynamics Society to publish the paper in the Conference Proceedings. Authors retain the copyright and may publish the paper elsewhere after the conference. All conference registrants will receive one copy of the Proceedings. Copies of the Proceedings can also be purchased from the Society after the conference. Site The conference will be held on the campus of Pine Manor College in Chestnut Hill, Massachusetts, five miles from Boston. The site will be familiar to those who attended the conference in 1983. Transportation from Boston's Logan International Airport is fast and easy. The rooms are comfortable yet inexpensive, and conference participants will enjoy special dining and entertainment treats. Boston's many attractions are close by. Family members will be perfectly situated to enjoy Boston's shops, restaurants, museums, historical sites, and more. Tours will be available for those not attending the conference sessions. Organizing Committee Chairman David F. Andersen, SUNY-Albany Program George P. Richardson, SUNY-Albany John D. Sterman, MIT Local arrangements Nathan B. Forrester, Sandhill Systems Julia S. Pugh, System Dynamics Society Demonstrations and displays Alan K. Graham, MIT Publicity Robert L. Eberlein, Ventana Systems Michael J. Radzicki, University of Notre Dame Conference manager Cathy Chazen Stone, Rockefeller Institute of Government ------------------------------ Date: Sun, 3 Sep 89 23:39:53 PDT From: annala%neuro.usc.edu@usc.edu (A J Annala) To: simulation@bikini.cis.ufl.edu Subject: NIH SAAM-25 Compartmental Modeling Program Newsgroups: comp.simulation In-Reply-To: <20653@uflorida.cis.ufl.EDU> Organization: University of Southern California, Los Angeles, CA Cc: I used SAAM-25 on a CDC-6600 many years ago to simulate turnover of lippoproteins in various physiological compartments. Does anyone know where I might obtain an updated copy of SAAM to run on either my local SUN workstation and/or on a UNICOS CRAY-2? I am interested in exploring its application to biological neural network modeling. Thanks, AJ Annala, USC Neuroscience Program p.s. Please send direct email replies to: annala%neuro.usc.edu@usc.edu ------------------------------ To: SIMULATION@UFL.EDU Newsgroups: comp.simulation Subject: Interindustry Analysis? Organization: Penn State University Date: Monday, 4 Sep 1989 09:26:23 EDT From: David L. Passmore Anyone aware of any software to implement versions of Wassily Leontief's methods, which usually go under the titles "Input-Output Models, "Interindustry Models"? ------------------------------ END OF SIMULATION DIGEST ************************