Xref: csc.canberra.edu.au comp.theory.cell-automata:1244 bionet.software:4466 sci.physics:37711 Path: csc.canberra.edu.au!newshost.anu.edu.au!munnari.oz.au!constellation!convex!convex!darwin.sura.net!ra!mimsy!mimsy.umd.edu!hhchou From: hhchou@cs.umd.edu (H.H. Chou) Newsgroups: comp.theory.cell-automata,bionet.software,sci.physics Subject: Announcement for Availability of CA software Message-ID: Date: 23 Mar 93 19:31:07 GMT Sender: news@mimsy.umd.edu Followup-To: comp.theory.cell-automata Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742 Lines: 105 Simple Systems Exhibiting Self-Directed Replication: Transition Functions, Software, and Documentation March, 1993 We have recently developed and studied cellular automata models of self-replicating systems [Science, 259, 1993, pp. 1282-1288]. Files containing a version of the various transition functions and software that we used in this study, as well as documentation, are now available via ftp. The cellular automata software is actually fairly general and could also serve as an application-independent simulator. For further details please refer to the paper cited above. Here is a brief description of how to get this online information: 1. If your system is not on Internet we cannot help. You might ask your friends on Internet to get this material for you. 2. If you are on Internet, type ftp ftp.cs.umd.edu if this does not work, type ftp 128.8.128.8 You will see the following message Connected to 128.8.128.8. 220 mimsy.cs.umd.edu FTP server (Version 4.135 Thu Apr 26... Name (128.8.128.8:hhchou): Now type in the login name "anonymous", then type in your email id as the password. You will see the following prompt Name (128.8.128.8:hhchou): anonymous 331 Guest login ok, send ident as password. Password: 230 Guest login ok, access restrictions apply. ftp> 3. Type the following command to change directory to /pub cd pub Next type the following command to signify binary file transfer bi You will see the following message ftp> cd pub 250 CWD command successful. ftp> bi 200 Type set to I. ftp> 4. Next, type the following command to get the files. get dtr.tar.Z You will see something like this ftp> get dtr.tar.Z 200 PORT command successful. 150 Opening data connection for dtr.tar.Z (128.8.128.151,... 226 Transfer complete. local: dtr.tar.Z remote: dtr.tar.Z 1598529 bytes received in 49 seconds (32 Kbytes/s) ftp> Type the following command to quit ftp quit 5. After you have transferred the files, move them somewhere in your system where you want to store them. Finally, type zcat dtr.tar.Z | tar xvf - This will retrieve everything in this package, and give you a directory called "dtr". Follow the instructions in the README file there. We hope you find this package useful to you. Note that although care has been taken while preparing this package, we know bugs are there somewhere. We do not have the resources to provide maintenance and support for this software. Suggestions or bug reports are welcome. If time permits we will try to fix any bug found and provide an improved version in the future. We would appreciate it if you acknowledge the use of this software in any future research reports that you might base upon it and send us a copy of such reports. Please send your correspondence to: hhchou@eng.umd.edu. Hui-Hsien Chou Dept. of Computer Science A.V. Williams Bldg. University of Maryland at College Park College Park, MD 20742 USA