LAWS@SRI-AI.ARPA (01/27/85)
From: AIList Moderator Kenneth Laws <AIList-REQUEST@SRI-AI.ARPA> AIList Digest Sunday, 27 Jan 1985 Volume 3 : Issue 9 Today's Topics: Application - Expert Systems for Control Applications, AI Tools - Tree Display Algorithms, Theory - Problem-solving Classifications, Symbolic Algebra - Computer_Algebra_List_P, AI Tools - MULTILISP, News - IMPAK Newsletter & Recent Reports, Humor - Lying Computers, Seminars - Knowledge in Interactive Proofs (UCB) & Recursion Transformation (CMU) ---------------------------------------------------------------------- Date: Fri, 25 Jan 85 10:45 EST From: Araman@HIS-BILLERICA-MULTICS.ARPA Subject: EXPERT SYSTEMS FOR CONTROL APPLICATIONS I am looking for pointers or references on Expert Systems which have been built in Command and Control situations or just control situations. Do such systems exist or are efforts under way in building such knowledge based application systems in non-military situations.. I am sure research done in command and control situations in military situations could be translated to problems in commercial situations such as process control, production control and inventory control thanks in advance sankar (Araman -at HI-MULTICS or Araman%his-billerica-multics -at cisl-service-multics.arpa) ------------------------------ Date: Fri, 25 Jan 85 16:38 EST From: Hannah Blau <Hannah%upenn.csnet@csnet-relay.arpa> Subject: inquiry about tree display algorithms Inquiry -- Tree Display Algorithms I am writing a program for the Lisp Machine to produce a graphical display of tree structures with labelled nodes. There is no a priori limit on the complexity of the tree, and the node labels vary in width. I am trying to develop an algorithm to adjust the layout of the nodes and edges in accordance with the dimensions of the window in which the tree is to be displayed. When drawing a big tree in a small window, I want to take advantage of the space available without distorting the structure of the tree. I would greatly appreciate hearing from anyone who has tackled this problem in the past or can refer me to relevant literature. Thank you very much. Hannah Blau HANNAH%upenn.csnet@CSNET-RELAY Department of Computer and Information Science University of Pennsylvania Philadelphia, Pennsylvania 19104 ------------------------------ Date: Sat, 26 Jan 85 18:08:26 pst From: Cindy Mason <mason@lll-crg.ARPA> Subject: Problem-solving Classifications I was recently writing an article on representations in AI when I came across some confusing literature, and I'm hoping some of the people who are experienced with this topic will comment on it. I've noticed that there are QUITE A FEW different classifications for problem solving paradigms. The AI Handbook (Vol. I, Sec. IIB) sees problem representations in terms of State-space representations and Problem-reduction representations, while Nilsson (1971) sees the classification in terms of State-space, Problem-reduction, and Theorom-proving. Hunt (1975) divides problem-solving into State-space, Problem-reduction, Enumeration, and String Rewriting. Winston's classification (1984) includes State-space, Constraints, Generate and Test, the Rule-based paradigm, etc. It seems to me that some of these paradigms (like Theorom-proving and Rules) are special cases of State-space. I'm wondering why there is such a variety of opinion on what constitutes a classification of Problem Solving representations. If anyone cares to comment on this, I'd be interested to hear what you have to say. ------------------------------ Date: Thursday, 24-Jan-85 12:01:51-GMT From: GORDON JOLY (on ERCC DEC-10) <GCJ%edxa@ucl-cs.arpa> Subject: Computer_Algebra_List_P ? Thanks for adding my request to AIList. For your information: I would be happy to add your name to the fowarding list for net.math.symbolic. This is a USENET new group devoted to symbolic algebra. Systems frequently referenced Reduce, Macsyma and Maple. We are supporting this interface as part of the Reduce project at Rand, Santa Monica, CA. -- lseward@randgr ------------------------------ Date: Thu, 24 Jan 85 15:20:40 PST From: David Alpern <ALPERN%SJRLVM4.BITNET@WISCVM.ARPA> Subject: Re: MULTILISP As of a couple of years ago, Bert Halstead and others around Tech Square (MIT LCS) were talking about a MULTILISP implementation for the CONCERT multiprocessor system. You might want to contact Bert (rhh%mit-vax@mit-mc) and see what developed. - Dave David Alpern IBM San Jose Research Laboratory, K65/282 5600 Cottle Road, San Jose, CA 95193 Phone: (408) 284-6521 Internet: Alpern%IBM-SJ@CSnet-Relay.ARPA Alpern@SJRLVM4.BITNET ------------------------------ Date: Sun 27 Jan 85 10:34:15-PST From: Ken Laws <Laws@SRI-AI.ARPA> Subject: IMPAK Newsletter For those of you not getting enough AI news, there's another new newsletter dedicated to AI, expert systems, robotics, smart graphics, etc. This one is IMPAK, 1902 Joliette Court, P.O. Box 7148, Alexandria, VA 22307-9990. Twelve issues are $147 ($97 academic). -- Ken Laws ------------------------------ Date: Fri, 25 Jan 85 13:45:40 cst From: Laurence Leff <leff%smu.csnet@csnet-relay.arpa> Subject: Recent Reports Technical Report - University of Wisconsin Madison TR 560 Mechanisms for Concurrency Control and Recovery in Prolog - A Proposal Michael J. Carey David J. DeWitt Goetz Graefe October 1984 UCLA CS Department Technical Reports Order from Ms. Brenda Ramsey UCLA Computer Science Department 3732 Boelter Hall Los Angeles, CA 90024 An Intelligent Router for VLSI Design Pierre Bouchon, Tulin Mangir, and Jacques Vidal CSD 840058 $5.00 Rule Based Generation of Test Structures for VLSI Grace Chen-Ellis and Tulin Mangir CSD-840059 $1.50 The Anatomy of Easy Problems: A Constraint-Satisfaction Formulation Rina Cachter and Judea Pearl CSD-840063 $1.00 Generalized Best-First Search Strategies and the Optimality of A* Rina Dechter and Judea Pearl CSD-840068 A Distributed Expert System for Space Shuttle Flight Control John Joseph Helly, Jr. Jacques Vidal, Chair CSD-840038 $6.75 Convince: A Conversational Inference Consolidation Engine Jin Hyung Kim CSD-840067 $8.50 Control Structures in a Prolog-Based Production System Tulin E. Mangir & Basuki Soetarman CSD-840054 $1.50 Recursive Random Games: A Probabilistic Model for Perfect Information Games Gerard Phillippe Michon Judea Pearl, Chair CSD-840029 $7.50 Pattern Recognition and Array Processing for Pollution Source Identification in Water Pollution Systems Yoshitaka Shibata Walter J. Karplus, Chair CSD-840062 $17.75 ------------------------------ Date: Friday, 25-Jan-85 10:23:18-GMT From: GORDON JOLY (on ERCC DEC-10) <GCJ%edxa@ucl-cs.arpa> Subject: A Thought. Computers that are intelligent will probably want to lie about their age. ------------------------------ Date: Wed, 23 Jan 85 11:51:25 pst From: khojesta%ucbernie@Berkeley (Khojesta Beverleigh) Subject: Seminar - Knowledge in Interactive Proofs (UCB) [Forwarded from the Stanford bboard by Laws@SRI-AI.] HOW TO GET A PROOF FROM THE DEVIL THURSDAY 1-24-85 AT 11:00 A.M. IN ROOM 597 EVANS HALL How much knowledge should a proof of a theorem T contain? Certainly enough to see that T is true. Usually much more. We derive an upper bound (expressed in bits) for the amount of knowledge that a recipient (with polynomially bounded resources) can compute from an interactive proof of T. For some number theoretic Ts. we show how someone who has enough information, henceforth, called "Devil", can prove to a skeptical man that T is true without releasing ANY additional knowledge. The faculty sponsor is Manuel Blum. ------------------------------ Date: 25 Jan 1985 0827-EST From: Lydia Defilippo <DEFILIPPO@CMU-CS-C.ARPA> Subject: Seminar - Recursion Transformation (CMU) [Forwarded from the CMU bboard by Laws@SRI-AI.] APPLIED LOGIC SEMINAR Speaker: Angelika Zobel Date: Wednesday, January 30, 1985 Time: 2:00 - 3:15 Place: 2105 Doherty Hall Title: Transferring Recursions into Iterations Though recursion is a powerful tool in program specification, efficiency makes it desirable to have a way of transforming these recursions into equivalent iterations. In this talk I shall present one such transformation of certain mutual recursions into equivalent iterative programs. The correctness of this transformation will be proved using generalized invariants which in a nice way capture the characteristics of the computation tree. We shall see how intuitive this correctness proof can be. ------------------------------ End of AIList Digest ********************