simulation@uflorida.cis.ufl.edu (Moderator: Paul Fishwick) (11/03/88)
Volume: 6, Issue: 5, Wed Nov 2 13:00:30 EST 1988 +----------------+ | TODAY'S TOPICS | +----------------+ (1) Packages for Transonic Flow? (2) PC Based Simulation Packages? (3) Simulation of Railway Operations? (4) John Conway Lecture at JVNC (5) Aloha Simulator Wanted * Moderator: Paul Fishwick, Univ. of Florida * Send topical mail to: simulation@uflorida.cis.ufl.edu * Archives available via FTP to bikini.cis.ufl.edu, login as 'anonymous', use your last name as the password, change directory to pub/simdigest. ----------------------------------------------------------------------------- id aa09117; 31 Oct 88 12:14 GMT From: mcvax!cs.aber.ac.uk!cho@uunet.UU.NET Date: Mon, 31 Oct 88 12:15:10 GMT To: simulation <uunet.uu.net!uflorida.cis.ufl.edu!simulation@ukc.ac.uk> Cc: CI1AMW@ibm.sheffield.ac.uk Subject: Packages for transonic flow ? This forwarded for a colleague... ----------------------------------------------------------------------- The problem under consideration is as follows:- A disc is travelling through the air at low supersonic speeds, with Mach number 2 or less. It is following the general motion of a freely rotating symmetric body:- It is rotating rapidly about its principal axis and this axis is simultaneously precessing rapidly around the (constant) angular momentum vector. In general, neither the overall spin vector nor the axis of the disc will be in the same direction as the angular momentum vector. Additionally the direction of travel of the disc will be in a similar, but not in general identical, direction to the angular momentum vector. The overall effect is of a spinning disc, flying at low supersonic speeds , at a high angle of attack (therefore placing the problem squarely in the transonic region). The angle of attack cycles rapidly with time as the disc precesses. I would be grateful for any pointers, references etc. to analytic and numerical techniques which may be applicable, and to suitable numerical packages available for the solution of transonic problems in general. Dr. A. M. Woodward, Civil Engineering Dept., University of Sheffield, England. email: (JANET) CI1AMW@UK.AC.SHEFFIELD.IBM ------------------------------------------------------------------------- Chris Orgill, tel +44 970 623111 x3227 AI & Robotics Research Group, email cho%cs.aber.ac.uk@uunet.uu.net (ARPA) Computer Science Department, cho@uk.ac.aber.cs (JANET) University College of Wales, Aberystwyth, Dyfed, United Kingdom. SY23 3BZ. ------------------------------ Mon, 31 Oct 88 15:46:17 PST id AA05857 for To: comp-simulation@ucsd.edu Path: csun!fedeva!jbr0871 From: sdsu!fedeva!jbr0871@ucsd.edu (Blaine Robertson) Newsgroups: comp.simulation Subject: PC Based Simulation Packages Keywords: PC Based Date: 31 Oct 88 21:32:03 GMT Organization: Federal Express Corp., Memphis, TN Does anybody have any experience with PC-based simulation packages? Modern Materials Handling (September 87) had an article listing about 25 PC-based packages. I realise that simulation on the PC will be dreadfully slow, but hope to gain enough knowledge from one of these products before making a bigger investment. The only package that I have had exposure to is AutoMod from ASI. Any feedback will be appreciated. Blaine Robertson Federal Express gatech!emcard!fedeva!jbr0871 ------------------------------ Date: Tue, 01 Nov 88 07:57:24 EST From: Jim Buchanan <ACAD8005%RYERSON.BITNET@CORNELLC.ccs.cornell.edu> Subject: Simulation of Railway operations To: simulation@uflorida.cis.ufl.edu I would like to contact anyone with experience in the simulation of railway operations in general and railway track maintenance in particular. If there is enough interest I will summarize to the list. thanks in advance Jim Buchanan Ryerson Polytechnical Institute Toronto, Ontario ------------------------------ Date: Tue, 01 Nov 88 10:41:39 EST From: David Salzman <SALZMAN@pucc.princeton.edu> Subject: John Conway lecture at JvNC, Nov. 7 To: comp-simulation@rutgers.edu The John von Neumann National Supercomputer Center 665 College Road East, Princeton Forrestal Center, Plainsboro NJ "Ambition, Distraction, Uglification and Derision" John Conway Princeton University 5:00 PM, Monday, November 7 There are simple rules for mathematical forms that lead quickly to wondrous and bizarre properties. Lexicographic codes exhibit particularly strange arithmetic, which will be explored in depth. The speaker promises to end the talk by citing the day of the week for any given birthdate. John Conway has always been fascinated by mathematical games, and his Game of Life is among the most widely known cellular automata systems. He earned his degrees and taught for many years at Caius College, Cambridge University, before coming to this country. Conway knows Pi to 2000 places. The seminar is open to the public. Refreshments will be served at 4:30 pm. For information about the seminar or directions to the Center, or if you are on the Princeton University campus and need a ride, contact <SCIENCE@JVNC.BITNET> or call 609/520-2000. Lectures are free and open to the public. Refreshments will be served at 3:40 pm and the talk will begin at 4:00 pm. For further information, contact David Salzman at (609)520-2000. ------------------------------ From: jxh%cup.portal.com%portal%claris%ames.uucp@mailrus.cc.umich.edu To: simulation@uflorida.cis.ufl.edu Subject: Aloha Simulator (wanted) Date: Tue, 1-Nov-88 17:58:16 PST X-Origin: The Portal System (TM) X-Possible-Reply-Path: jxh@cup.portal.com X-Possible-Reply-Path: sun!portal!cup.portal.com!jxh We are trying to understand the effects of varying certain parameters in a shared-channel data transmission system that (uses/will use) Aloha, Slotted Aloha, Reservation Aloha, and/or FTDMA. I have been asked to post a request for information about simulators that might aid us in this task. Would one use a general-purpose simulation system to accomplish this, or are we looking for a specific program? It would be convenient if it (whatever *it* is) ran on a PC under DOS 3.xx (or, even better, under OS/2), but that is not absolutely necessary: we will take the mountain to Mohammed under the right conditions. Am I way out in left field, here? Is there another group where I ought to post this? (For that matter, could someone else stuff this into rec.ham-radio.packet for me? Portal makes this unnecessarily difficult.) Please email responses, and I will summarize. Thanks for educating me. -Jim Hickstein Principal Engineer Datacomm Systems Group VSAT Systems, Inc. San Jose, CA jxh@cup.portal.com ...!sun!portal!cup.portal.com!jxh ------------------------------ +--------------------------+ | END OF SIMULATION DIGEST | +--------------------------+