From eletter@win.tue.nl Wed Mar 1 16:20:09 1995 To: eletter@win.tue.nl Subject: E-letter no. 79 From: eletter Reply-To: esend@win.tue.nl E-LETTER on Systems, Control, and Signal Processing ISSUE No. 79, March 1, 1995 E-mail: eletter-request@win.tue.nl Editors: Anton A. Stoorvogel Dept. of Mathematics & Computing Science Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven the Netherlands Fax +31-40-465995 Siep Weiland Dept. of Electrical Engineering Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven the Netherlands Fax +31-40-434582 Contents 1. Editorial 2. Personals 3. General announcements 3.1 Signal processing for the national information infrastructure 3.2 News from ILAS 3.3 Course announcement at MIT 3.4 SCAD update 4. Positions 4.1 Post Doctoral Position AEB Industrial Systems, Sweden 5 Books 5.1 Linear system theory -- W.J. Rugh 5.2 Robust stabilizability and convexity: an introduction -- J.Kogan 6. Journals 6.1 TOC LAA vol. 215 6.2 TOC MCSS vol. 7:2 6.3 Call for papers on neural nets and fuzzy systems for special issue of J. of intelligent control and systems 6.4 TOC IEEE Trans. Automatic Control vol. 40:3 6.5 Call for papers special issue of Wireless Networks 6.6 TOC SIAM Review, vol. 37:1 6.7 TOC Circuits, Systems and Signal Processing, vol. 14:2 7. Conferences 7.1 29th conf. on information sciences and systems -J.Hopkins Univ. 7.2 33rd annual Allerton conf. on communication, control and comp. 7.3 Bernoulli workshop `control of uncertain systems' -Groningen Un. 7.4 Call for papers conf. automatics and informatics -Sofia univ. 7.5 2nd European workshop on hybrid systems -Grenoble 7.6 Travel support for ICIAM-95 conference 7.7 CfP International Symposium for Intelligent Robotics ****************************************** * * * Editorial * * * ****************************************** Welcome to E-letter number 79 !!! We plan to send out the E-letter monthly. The next issue of E-letter will appear April 1. Please send contributions before this date. We encourage contributors to provide essential information only. We reserve the right to require contributors to cut certain parts of their contribution. We remind you of the following. -1- Contributions have to be sent to: "eletter-request@win.tue.nl" It would be useful if articles are already sent in the format that we use, starting with a "Contributed by:..." and a title centered in the next line. Each line should be no more than 80 characters wide. Please respect the MAXIMUM LENGTH OF 6 Kb per contribution. -2- You can subscribe to the E-letter by sending an (empty) e-mail message to "eletter@win.tue.nl" carrying the subject 'add' or 'subscribe'. You will be automatically subscribed and included in our mailing list. 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In case of any problems please send an E-mail to "eletter-request@win.tue.nl" and we will try to resolve the problem. -4- Further information about the E-letter can be obtained by sending an (empty) e-mail message to "eletter@win.tue.nl" carrying the subject 'info' or via the finger command: "finger eletter@wsbs08.bs.win.tue.nl" -5- If you are using an editor to read this mailing and if at any point you wish to skip to the next article, you can accomplish this by searching for the string: *.** ****************************************** * * * Personals * * * ****************************************** *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Floyd Hanson Change of Address: For the Spring Semester, January through June, my sabbatical address will be PROFESSOR FLOYD B. HANSON SCHOOL OF CIVIL & ENVIRONMENTAL ENGINEERING CORNELL UNIVERSITY HOLLISTER HALL ITHACA NY 14853-3501 Email: hanson@optimus.cee.cornell.edu OfficeTel: 607-255-3792 SchoolTel: 607-255-3438 SchoolFax: 607-255-9004 I will still be reading my email at hanson@uic.edu and hanson@math.uic.edu. Floyd Hanson (permanent affiliation) Dept. Math, Stat, & Comp Science University of Illinois at Chicago ****************************************** * * * General announcements * * * ****************************************** *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Robert M. Gray Signal Processing for the National Information Infrastructure A report titled ``Signal Processing for the NII'' based on a Workshop/Panel on the topic held at the National Science Foundation in August 1994 has now been officially released and is available by anonymous ftp. The participants included Julia Abrahams of ONR, George Cybenko of Dartmouth, Martin Cohn of Brandeis, Tom Fischer of Washington State University, Michael Goodchild of UC Santa Barbara, Robert Gray of Stanford, Richard Greenberg of the University of Arizona, Ali Habibi of Aerospace Corporation, Barry Haskell of Bell Telephone Labs, H.K. Huang of UC San Francisco, John Limb of Georgia Tech, Majid Rabbani of Kodak, Tom Stockham of Stocham Technologies and the University of Utah, Steve Tanimoto of the University of Washington, George Thoma of the National Library of Medicine, and Martin Vetterli of Columbia and UC Berkeley. Topics include the history, state-of-the-art, and future directions of applications of signal processing theory and algorithms to the NII, the ``information superhighway.'' The report is available by anonymous ftp to isl.stanford.edu. Both latex and postscript files are in the directory pub/gray/reports. A World Wide Web version will be available in the near future at the NSF Web server. An xmosaic version is available at xmosaic http://www.ee.gatech.edu/users/215/nii/niireport.html *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Daniel Hershkowitz News from ILAS INFORMATION CENTER (IIC) As of December 28, 1994, we have shifted the IIC database to a new machine. Consequently, we are happy to announce the following significant improvement in the services offered by IIC. There are now THREE ways to use the services of IIC: I. Using MOSAIC, XMOSAIC, NETSCAPE or LYNX Issue the command command http://math.technion.ac.il/iic where command stands for mosaic, xmosaic, netscape or lynx . II. FTP 1. Enter 'ftp math.technion.ac.il' 2. Enter 'anonymous' for the "user:" prompt 3. type your local userid as a PASSWORD 4. Once you get the first panel, type 'cd iic' to be connected to IIC 5. Issue any FTP command (type 'help' for available FTP commands) III. E-mail Include the command SEND http://math.technion.ac.il/iic/filename (where "filename" is the file you request) in the mail body of a message sent to agora@mail.w3.org . The file will be sent to you in a mail file. The message can include more than one request. >>> Files that can be obtained from IIC The list of files that can be obtained from IIC is included in the file index.html . Note the system is case sensitive and that all file names in IIC (with the exception of index.html) are given in upper case characters. IIC (ILAS INFORMATION CENTER) is happy to announce a new service: Links to members' home pages. Those of you who wish to have links from our database center to their home page should e-mail their home page address to Danny Hershkowitz at hershkow@techunix.technion.ac.il ------------------------------- On the basis of a report received from the ballot-counting subcommittee of the Nominating committee for the recent ILAS elections, the following have been elected to ILAS offices as of March 1, 1995: Vice President: Daniel Hershkowitz (three year term) Board of Directors: Robert C. Thompson (three year term) Peter Lancaster (three year term) Chi-Kwong Li (two year term) Angelika Bunse-Gerstner (two year term) In addition to the above, the following continue in their offices to which they were previously elected: Hans Schneider, President James R. Weaver, Secretary/Treasurer Richard A. Brualdi, member of Board of Directors Thomas Laffey, member of Board of Directors We wish to thank all candidates for agreeing to stand for election to ILAS offices. Hans Schneider President, ILAS *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: John Tsitsiklis COURSE ANNOUNCEMENT Intelligent Decision and Control with Neural Networks by Dimitri P. Bertsekas and John N. Tsitsiklis Professors of Electrical Engineering and Computer Science Mass. Institute of Technology August 14-18, 1995 M.I.T. Summer Professional Program 6.95s Tuition: $1,900 CEUs: 3.0 Over the last few years there has been rapidly expanded interest on complex engineering problems, in areas ranging from signal processing and pattern recognition to control theory, and all the way to applications in logistics and finance. Such problems often involve high dimensional systems (the "curse of dimensionality") or highly nonlinear, sometimes ill-defined models. While little progress can be made on such problems using classical methods, recently there has been an explosion of methods based on artificial neural networks and related approximation techniques that have greatly expanded the scope of solvable problems. These methods have generated much excitement and publicity, and have seen significant practical use. The objective of this course is to cover the foundation of neural network techniques as well as their application to specific problem domains. While the successful use of neural network methods contains a certain element of "art", there is also an accumulated body of knowledge that provides a useful guide into applications, and enables a critical appraisal of the sometimes inflated and conflicting claims regarding the potential of the neural network technology. The course provides a balanced approach between the art and the science of neural networks. On the methodological side, it covers different neural network architectures and the associated training algorithms; how to use neural network methods in areas like classification, signal processing, and nonlinear control; and, finally, how to adapt traditional methods for decision making under uncertainty (dynamic programming) so that they can work hand in hand with neural networks and other tools for addressing complex, ill-defined, and large-dimensional problems. On the application side, there will be several examples to illustrate the use of the different methods in specific domains and to amplify some of the issues that are important in practice. The course should be attractive to practicing engineers and researchers who want to understand the interface between theory and practice, and who would like to harness the power of neural networks to address complex engineering problems. Due to the diversity of the examples to be covered, the course is designed to be equally appealing to people in signal processing, control theory, and operations research. Contents: 1) Introduction to Neural Network Methods and Applications, 2) Neural Network Architectures and Training Methods, 3) Classification, Estimation, Identification, and Control with Neural Networks, 4) Neuro-Dynamic Programming and Reinforcement Learning FOR FURTHER INFORMATION AND ADMISSION APPLICATION: MIT Summer Session Office, 8-201, Cambridge, MA 02139 Phone: (617) 253-2101 FAX: (617) 253-8042\ \ email: summer--professional--programs@mit.edu world wide web home page: http://web.mit.edu/org/s/summer-programs/ *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Raimund J. Ober Xu Huang UPDATE ON SCAD DATABASE -- February 1995 ******************************************************************************* #### #### ## ##### # # # # # # # #### # # # # # # # ###### # # # # # # # # # # #### #### # # ##### Systems and Control Archive at Dallas gopher: gopher.utdallas.edu ftp address: ftp.utdallas.edu IP number: 129.110.10.14 Worldwide web: URL: http://www.utdallas.edu/research/scad queries (email): scad@utdallas.edu ****************************************************************************** New contents: ============= eletters: ========= Number 78 New activities: =============== We keep expanding the information that we are offering. Check out our WWW and gopher pages! Information is available on: books, jobs, journal contents pages, conferences, software and much more. To improve our database we need your input with suggestions of what to add and how to improve SCAD! ************ Remember to send your tech reports and other material! ********* How to access scad: =================== 1.) Using gopher: Type gopher -p 1/research/scad gopher.utdallas.edu or gopher gopher.utdallas.edu Select `UT-Dallas Research' and then `Systems and Control Archive at Dallas' 2.) Using ftp: ftp ftp.utdallas.edu Then cd /pub/scad 3.) Using Worldwide Web: URL: http://www.utdallas.edu/research/scad More detailed instructions can be obtained by sending an email to scad@utdallas.edu After accessing SCAD you can find a README file which contains more information about SCAD. ****************************************** * * * Positions * * * ****************************************** *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Per-Olof Gutman peo@math.kth.se POST DOCTORAL POSITION Where: ABB Industrial Systems, Ltd Dept HUA 72167 Vasteras, Sweden Duration: One or two years, starting immediately, but not later than the summer of 1995. Project: Robust Control of Electrical Drives. This is a cooperative research project between ABB Industrial Systems, Ltd, and the Department of Optimization and Systems Theory, the Royal Institute of Technology, Stockholm, Sweden. Conditions: Free housing + tax free scholarship, covering the normal living expenses of a small family. Tasks: Development and comparison of cascaded and multivariable control algorithms for electrical drives. Development of algorithms for robust estimation of unmeasured state variables for electrical drives. The research includes analysis, simulation, laboratory implementation and experimentation. Background: Ph. D. in Automatic Control. Interest in electro- mechanical systems and experimental work. Contact: Dr Per-Olof Gutman, email: peo@math.kth.se Prof Anders Lindquist, email: alq@math.kth.se Johann Galic, Dept HUA, ABB, fax: +46 21 144760 ****************************************** * * * Books * * * ****************************************** *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by Jack Rugh LINEAR SYSTEM THEORY A second edition of LINEAR SYSTEM THEORY by Wilson J. Rugh will be available from Prentice Hall in Summer 1995. NEW FEATURES Ten new chapters covering discrete-time, time-varying linear systems. Theme physical examples added throughout the book. Additional drill exercises. Increased independent treatment of the time-invariant case. New material on time-varying, reduced-dimension observers. New geometric treatment of time-invariant canonical structure theorem. Incremental improvements to the continuous-time presentation. For course adoption a prepublication copy can be obtained by contacting Phyllis Morgan, College Editorial, Prentice Hall, 113 Sylvan Ave., Englewood Cliffs, NJ 07632, or by email to books@prenhall.com. Enclose your school address and the following information about the course: course number, number of sudents, decision date, and current text. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Jacob Kogan NEW BOOK ANNOUNCEMENT Title: Robust Stability and Convexity: An Introduction Lecture Notes in Control and Information Sciences, Vol. 201 Springer--Verlag, London, 1995 ISBN 3-540-19919-5 ISBN 0-387-19919-5 Author: J. Kogan, University of Maryland Baltimore County, U.S.A. About the Book: The book addresses stability problems for linear systems with parametric uncertainty. A basic convexity approach recovers many known results associated with stability of polynomial families whose coefficients are affine functions of parameters, in particular Kharitonov's Theorem is obtained as a special particular case. In many engineering problems coefficients of a characteristic function depend on parameters in a non linear way. When the coefficients are multi linear functions of parameters the Mapping Theorem of Zadeh and Desoer provides simple and elegant sufficient stability conditions. However, in many practical situations these conditions are excessively conservative. Furthermore, even in the simplest case of quasipolynomial families with interval coefficients and interval delays the exponential dependence of the characteristic quasipolynomial on the delays can not be handled by the Mapping Theorem. An application of convexity techniques leads to new computationally tractable stability criteria for families of characteristic functions with non linear dependence on the parameters. Stability results covering special cases of linear systems with parameter multiaffine uncertainties, as well as stability criteria for time--delay systems with uncertainties in coefficients and delays are reported in the book. The book contains an extensive list of more than 120 recent references on the subject, and, in addition, provides an access to more than 800 related references. Contents: Preface Chapter 1: Introduction and Motivation Chapter 2: Stability of Box Polynomial Families Chapter 3: Stability Radii and Convex Analysis Chapter 4: Multiaffine Polynomial Families Chapter 5: Multidimensional Systems and Systems with Commensurate Delays Chapter 6: Uncertain Time--Delay Systems Chapter 7: Convexity of Frequency Response Arcs Associated with Hurwitz Quasipolynomials Chapter 7: Epilogue Bibliography List of Special Symbols Author Index Subject Index To obtain a postscript file which contains the table of contents and the first two Chapters of the book execute the following commands: type ftp 130.85.145.16 respond to login prompt as "anonymous" respond to password prompt as "kogan" type "cd pub/kogan" to get in my directory type "get ch1ch2.ps" type "quit" to get out of ftp If you need help in this regard e-mail Jacob Kogan at kogan@math.umbc.edu. ****************************************** * * * Journals * * * ****************************************** *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Richard Brualdi LINEAR ALGEBRA AND ITS APPLICATIONS Contents Volume 215 Uwe Helmke (Regensburg, Germany) and Mark A. Shayman (College Park, Maryland) Critical Points of Matrix Least Squares Distance Functions 1 Johan Kos (Amsterdam, the Netherlands) and Hugo J. Woerdeman (Williamsburg, Virginia) Hermitian Completions of Band Matrices and Applications 21 F. O. Farid (Calgary, Alberta, Canada) Criteria for Invertibility of Diagonally Dominant Matrices 63 Ji-guang Sun (Umea, Sweden) On Perturbation Bounds for the QR Factorization 95 Janez Mrcun (Ljubljana, Slovenija) Lipschitz Spectrum Preserving Mappings on Algebras of Matrices 113 J. P. Crouzeix (Aubiere, France), J. E. Martinez-Legas, and A. Seeger (Barcelona, Spain) An Alternative Theorem for Quadratic Forms and Extensions 121 Jin-Hsien Wang (Kaohsiung, Taiwan, Republic of China) The Length Problem for a Sum of Idempotents 135 Vlastimil Ptak (Praha, The Czech Republic) Decomposition of the Infinite Companion and Interpolation 161 Miroslav Fiedler (Prague, Czech Republic) and Thomas L. Markham (Columbia, South Carolina) An Observation on the Hadamard Product of Hermitian Matrices 179 Nader H. Bshouty (Calgary, Alberta, Canada) Multiplicative Complexity of Direct Sums of Quadratic Systems 183 Krzysztof C. Kiwiel (Warsaw, Poland) Block-Iterative Surrogate Projection Methods for Convex Feasibility Problems 225 Moody T. Chu (Raleigh, North Carolina) Scaled Toda-like Flows 261 Dursun Tasci (Kampus-Konya, Turkey) On a Conjecture by Goldberg and Newman 275 Author Index 279 *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.* Contributed by: Jan H. van Schuppen (J.H.van.Schuppen@cwi.nl) Mathematics of Control, Signals, and Systems (MCSS) TABLE OF CONTENTS Volume 7, Issue 2 Z.P. Jiang, L. Praly, and A.R. Teel, Propagating the input to state stability property through integrators and applications, 95-120. X. Kong and V. Solo, Stochastic averaging analysis of a steepest descent type adaptive time delay estimation algorithm, 121-147. Gilead Tadmor, A time varying Beurling-Lax theorem and a related interpolation problem, 148-166. Fabio Fagnani and Jan C. Willems, Interconnections and symmetries of linear differential systems, 167-186. REMINDER The new address for submissions is: J.H. van Schuppen Co-Editor MCSS CWI P.O. Box 94079 1090 GB Amsterdam The Netherlands E-mail inquires regarding submission should be addressed to: mcss@cwi.nl. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.* Contributed by: F.L. Lewis, CALL FOR PAPERS Neural Networks and Fuzzy Systems for Closed-Loop Control Applications A Special Issue of: "Journal of Intelligent Control and Systems" Special Issue Editors: F.L. Lewis and K. Liu Automation and Robotics Research Institute The University of Texas at Arlington 7300 Jack Newell Blvd. S Ft. Worth, Texas 76118-7115 Papers are solicited for a special issue on Neural Networks and Fuzzy Systems for Closed-Loop Control Applications of the "Journal of Intelligent Control and Systems". Both short papers and regular papers are desired. The format of JICS is identical to that of IEEE Transactions. Intelligent controllers have the potential to significantly improve the performance of complex nonlinear processes. Neural networks and fuzzy systems have been applied with considerable success in digital signal processing, decision-making, classification, and other open-loop applications. However, closed- loop control applications of neural networks and fuzzy systems have generally been ad hoc, with no repeatable design algorithms or proofs of guaranteed stability. In spite of the lack of rigorous techniques for intelligent control system design, neural network and fuzzy system controllers have enjoyed remarkable success in complex control applications. This motivates one to use mathematical approaches to provide understanding and to shed light on further possibilities. It is the proofs that yield valuable information concerning: (1) the structure of the neural or fuzzy control system, (2) modified learning rules that keep tracking errors small and adaptive parameters bounded, and (3) additional control input terms that ensure robustness against unforseen disturbances. Without guaranteed performance, acceptance of intelligent controllers by the control systems community and US industry will not be forthcoming. Therefore, this special issue will focus on closed-loop control applications of neural networks and fuzzy systems that offer repeatable design algorithms and mathematical proofs of stability and performance. Papers that present simulations following nonrigorous discussions cannot be included. The objective of this special issue is to provide a forum for developing paradigms for intelligent control systems in the sense of T.S. Kuhn's "Structure of Scientific Revolutions". The Special Issue will appear in early 1996. Four copies of manuscripts should be submitted for review by 15 July 1995: Neural net papers should be addressed to F.L. Lewis 817-794-5972, fax 817-794-5952, flewis@controls.uta.edu Fuzzy systems papers should be addressed to K. Liu 817-794-5971, 817-794-5952, kliu@controls.uta.edu *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: John Baillieul, Editor-in-Chief IEEE TRANSACTIONS ON AUTOMATIC CONTROL Table of Contents - Volume 40, Number 3 - March, 1995 ___________________________________________________________________________ Scanning the Issue ___________________________________________________________________________ PAPERS Observer Design for Nonlinear Systems with Discrete-Time Measurements .................................... P. E. Moraal and J. W. Grizzle A Probabilistic Approach to Multivariable Robust Filtering and Open-Loop Control ............... K. Ohrn, A. Ahlen, and M. Sternad A New Model for Control of Systems with Friction ..... C. Canudas de Wit, H. Olsson, K. J. Astrom, and P. Lischinsky Adaptive Nonlinear Design with controller-Identifier Separation and Swapping ............................ M. Krstic and P. V. Kokotovic Approximate Decoupling and Asymptotic Tracking for MIMO Systems .................................... D. N. Godbole and S. S. Sastry A Generalized Orthonormal Basis for Linear Dynamical Systems ......... P. S. C. Heuberger, P. M. J. Vanden Hof, and O. H. Bosgra H\infty Control via Measurement Feedback for General Nonlinear Systems ............................................ A. Isidori and W. Kang ____________________________________________________________________________ TECHNICAL NOTES AND CORRESPONDENCE Perturbation Bounds for Root-Clustering of Linear Systems in a Specified Second Order Subregion ....... W. Bakker, J. S. Luo, and A. Johnson Comments on "Strictly Positive Real Transfer Functions Revisited" ................................... H. J. Marquez and C. J. Damaren On Interval Polynomials with No Zeros in the Unit Disc ......... V. Blondel The Logical Control of An Elevator ............ D. N. Dyck and P. E. Caines Robust Stability Criteria for Dynamical Systems Including Delayed Perturbations ............................... H. Wu and K. Mizukami An Efficient Method for Unconstrained Optimization Problems of Nonlinear Large Mesh-Interconnected Systems ......... S.-Y. Lin and C.-H. Lin On the POssible Divergence of the Projection Algorithm .................................... E. Lefeber and J. W. Polderman A Comment on the Method of the Closest Unstable Equilibrium Point in Nonlinear Stability Analysis ........... E. Noldus and M. Loccufier Boundaries of Conditional Quadratic Forms - A Comment on "Stabilization via Static Output Feedback" ............. D. Cheng and C. F. Martin On Robust Stability of 2-D Discrete Systems ...................... W.-S. Lu Multivariable System Identification via Continued-Fraction Approximation ........................................ R. Johansson All Fixed-Order H\infty Controllers: Observer-Based Structure and Covariance Bounds .................... T. Iwasaki and R. E. Skelton Intrinsic Difficulties in Using the Doubly-Infinite Time Axis for Input-Output Control Theory ........ T. T. Georgiou and M. C. Smith Regional Observability of a Thermal Process ................ A. El Jai, E. Zerrik, M. C. Simon, and M. Amouroux Towards a Generalized Regulation Scheme for Oscillatory Systems via Coupling Effects .... K. L. Tuer, M. F. Golnaraghi, and D. Wang u-Synthesis of An Electromagnetic Syspension Systems .............. M. Fujita, T. Namerkawa, F. Matsumura, and K. Uchida Parameter-Dependent Lyapunov Functions and the Popov Criterion in Robust Analysis and Synthesis ........... W. M. Haddad and D. S. Bernstein Design of L-Q Regulators for State Constrained Continuous-Time Systems ................................ C. E. T. Dorea and B. E. A. Milani The Finite Invlusions Theorem ........... R. D. Kaminsky and T. E. Djaferis Futher Results on Rational Approximations of L1 Optimal Controllers .......................... Z.-Q. Wang, M. Sznaier, and F. Blanchini Supervisory Control of Timed Discrete-Event Systems under Partial Observation ............................... F. Lin and W. M. Wonhan Apology and Correction to "Process Control and Machine Learning: Rule-Based Incremental Control" ..... D. Luzeaux and B. Zavidovique _____________________________________________________________________________ BOOK REVIEWS Mathematical Control Theory: Deterministic Finite-Dimensional Systems - Eduardo D. Sontag ........................ Reviewed by S. P. Boyd ____________________________________________________________________________ REVISED 1994 INDEX *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Martha Steenstrup and Ram Ramanathan CALL FOR PAPERS FOR WIRELESS NETWORKS SPECIAL ISSUE We have extended the paper submission date for the following special issue of Wireless Networks to 1 April 1995. Call for Papers For the new journal published in cooperation with the ACM: WIRELESS NETWORKS Special Issue: Routing in Mobile Communications Networks Scope: Routing in communications networks may be characterized as transporting information from a source to one or more destinations, so as to meet the service requirements for that information. In the context of mobile wireless communications, the routing problem affects all multi-hop mobile networks including cellular networks, packet radio networks, and satellite networks. Wireless networks with mobile components, including mobile switching nodes as well as end nodes, compound the routing problem with frequent changes in network topology and link quality. Mobile network topology and link quality may be deterministic, as in satellite constellations providing world-wide personal communications services, or it may be highly unpredictable, as in tactical packet radio networks. Furthermore, there is now demand for support of real-time multimedia applications, in addition to phone calls and paging, over mobile wireless networks. Maintaining uninterrupted high-quality service for distributed applications in the presence of highly mobile switching and end nodes requires solving a challenging set of routing-related problems. For this special issue, we seek papers that provide solutions to one or more of these problems, including but not limited to the following: - Mobile end node location tracking and prediction, emphasizing the costs and benefits of maintaining up-to-date location information. - Mobile network topology discovery mechanisms. - Seamless handover of routes and connections in highly mobile environments. - Route selection accounting for quality of service requirements in mobile wireless networks. - Routing across interconnected fixed and mobile networks. - Interactions among routing, flow control, and resource allocation in mobile wireless networks. - Multicast distribution in mobile networks. - Scalable routing in very large mobile networks. Extensions to existing routing schemes as well as new approaches to mobile network routing are of interest. The papers should describe the problems to be solved, including the nature of the mobile networking environment in which the problems occur, the solutions to the problems posed, and the cost/benefit tradeoffs of the proposed solutions. The authors should send 6 copies of their paper to one of the guest editors by 1 April 1995. The following time-table shall be followed: Manuscript Submission Deadline: 1 April 1995 Acceptance Notification: 1 June 1995 Final Manuscript Submission Deadline: 1 August 1995 Publication Date: December 1995. Guest Editors: Martha Steenstrup Bolt Beranek and Newman Inc. 10 Moulton Street Cambridge, MA 02138 Telephone: (617) 873-3192 Facsimile: (617) 873-3776 Internet: msteenst@bbn.com Ram Ramanathan Bolt Beranek and Newman Inc. 10 Moulton Street Cambridge, MA 02138 Telephone: (617) 873-2736 Facsimile: (617) 873-3776 Internet: ramanath@bbn.com *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: nelson@siam.org SIAM REVIEW, VOL. 37, NO. 1, MARCH 1995, TABLE OF CONTENTS Articles Mathematical Morphology: A Modern Approach in Image Processing Based on Algebra and Geometry Henk J. A. M. Heijmans A Chaotic Exploration of Aggregation Paradoxes Donald G. Saari Anti-plane Shear Deformations in Linear and Nonlinear Solid Mechanics C. O. Horgan Case Study from Industry Optimizing Continuous Caster Product Dimensions: An Example of a Nonlinear Design Problem in the Steel Industry Francis J. Vasko and Kenneth L. Stott Classroom Notes in Applied Mathematics Sensible Rules for Remembering Duals--the S-O-B Method Arthur T. Benjamin How Many Shuffles to Mix a Deck? Joseph B. Keller A Resonant Line Structure Consisting of Rational Right Triangles Sid Deutsch A Unified Proof for the Convergence of Jacobi and Gauss-Seidel Method Roberto Bagnara Problems and Solutions Book Reviews Global Behavior of Nonlinear Difference Equations (V. L. Kocic and G. Ladas) Ravi P. Agarwal Network Flows (R. K Ahuja, T. L. Magnanti, and J. B. Orlin) Michael O. Ball Catalan's Conjecture (P. Ribenboim) J. W. S. Cassels Evolutionary Integral Equations and Applications (J. Pruss) C. Corduneanu Catastrophe Theory (Domenico P. L Castrigiano and Sandra A. Hayes) David Chillingworth Moving-Grid Methods for Time-Dependent Partial Differential Equations (P. A. Zegeling) Thomas K. DeLillo Schur's Algorithm and Several Applications (M. Bakonyi and T. Constantinescu) A. E. Frazho Numerical Solution of Ordinary Differential Equations (L.F. Shampine) I. Gladwell Partial Differential Equations in Classical Mathematical Physics (I. Rubinstein and L. Rubinstein) Ronald B. Guenther Viscous Vortical Flows (L. Ting and R. Klein) Max D. Gunzburger Codes, Puzzles, and Conspiracy (Dennis Shasha) Glen Richard Hall Computational Geometry in C (J. O'Rourke) Christoph M. Hoffmann The Essence of Chaos (E. N. Lorenz) Philip Holmes Operator-Limit Distributions in Probability Theory (Z. J. Jurek and J. D. Mason) W. N. Hudson Introduction to Maple (Andre Heck) Wolfram Koepf Singularity Theory and Equivariant Symplectic Maps (Thomas Bridges and Jacques E. Furter) Kenneth R. Meyer Random Series and Stochastic Integrals: Single and Multiple (Stanislaw Kwapien and Wojbar A. Woyczynski) Philip Protter Ray Methods for Nonlinear Waves in Fluids and Plasmas (A. M. Anile, J. K. Hunter, P. Pantano, and G. Russo) Jeffrey Rauch A First Course in Discrete Dynamical Systems (R. A. Holmgren) James T. Sandefur Completeness of Root Functions of Regular Differential Operators (S. Yakubov) Hans Triebel Selected Collections Chronicle *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: A. H. Zemanian (zeman@sbee.sunysb.edu) Table of Contents for: CIRCUITS, SYSTEMS, AND SIGNAL PROCESSING Vol. 14, No. 2, 1995 Behavior of Hilbert networks under perturbations of their elements Vaclav Dolezal Design considerations and stability of a digital filter with finite wordlength J.Hocherman and E.Zeheb On the design of feedback controllers to achieve prescribed initial value constraints P.J.Warden and R.Saeks Circuit duality for recurrent Markov processes S.Kalpazidou An improved scheme for direct adaptive control of dynamical systems using backpropagation neural networks K.P.Venugopal, R.Sudhakar, and A.S.Pandya Estimation of direction-of-arrivals based on the array manifold space Yifeng Zhou and Patrick C.Yip AR models for wideband source location Jingyun and P.Yip ****************************************** * * * Conferences * * * ****************************************** *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Pablo A. Iglesias (pi@ruth.ece.jhu.edu) 29th CONFERENCE ON INFORMATION SCIENCES AND SYSTEMS March 22-24, 1995 The Johns Hopkins University Baltimore, Maryland The Twenty-Ninth Annual Conference on Information Sciences and Systems will be held on March 22, 23, and 24, 1995 at The Johns Hopkins University in Baltimore, Maryland under the sponsorship of the Department of Electrical and Computer Engineering. The Conference will host sessions on communications, control, signal processing and computers. Further information, including o Preliminary Program o Registration Information o Hotel and Travel Information is available via the www page: http://www.ece.jhu.edu/dept/ciss95.html For registration information, please contact the Conference Coordinator: Ms. Katharine Rylaarsdam Department of Electrical and Computer Engineering The Johns Hopkins University Baltimore, Maryland 21218 Telephone: (410) 516-7033 Fax: (410) 516-5566 Email: ciss@psi.ece.jhu.edu For other information contact the Program Directors: Brian L. Hughes and Pablo A. Iglesias Department of Electrical and Computer Engineering The Johns Hopkins University Baltimore, Maryland 21218 Telephone: (410) 516-8474 and (410) 516-6026 Fax: (410) 516-5566 Email: ciss95@ruth.ece.jhu.edu *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Ken Zeger THIRTY-THIRD ANNUAL ALLERTON CONFERENCE ON COMMUNICATION, CONTROL, AND COMPUTING OCTOBER 4 - 6, 1995 The Thirty-third Annual Allerton Conference on Communication, Control, and Computing will be held October 4-6, 1995 at Allerton House, the conference center of the University of Illinois. Allerton House is located twenty-six miles south-west of the Urbana-Champaign campus of the University in a wooded area on the Sangamon River. It is part of the fifteen-hundred acre Robert Allerton Park, near Monticello, Illinois. Papers presenting original research are solicited in the areas of communication systems, information theory and coding, detection and estimation, communication networks, mobile radio, vector quantization, source coding, image coding and data compression, control systems, robust and nonlinear control, adaptive control, optimization, dynamic games, large scale systems, robotics and automation, manufacturing systems, discrete event systems, intelligent control, multivariable control, adaptive signal processing, learning theory, neural networks, and numerical methods for signals and systems, multiple-access communications, digital radio, high-speed packet switches for telecommunications, queueing networks, discrete event systems, and automatic highway systems. Information for authors: Regular papers, suitable for presentation in twenty minutes, and short papers, suitable for presentation in ten minutes, are solicited. The purpose of the short paper category is to encourage authors to present preliminary results of their work. Regular papers will be published in full (subject to a maximum length of ten 8.5 x 11 inch pages) in the Conference Proceedings, while short papers will be limited to two-page summaries in the Proceedings. For regular papers, a title and a five-to-ten page extended abstract, including references and sufcient detail to permit careful reviewing, are required. For short papers, a title and a thousand-word summary are required. Manuscripts that are submitted as regular papers but cannot be accommodated in that category will be considered in the short paper category, unless the authors indicate otherwise. Two copies of the manuscript should be mailed to 33rd Annual Allerton Conference, University of Illinois at Urbana-Champaign, Coordinated Science Laboratory, 1308 West Main Street, Urbana, Illinois 61801-2307, USA in time to be received by July 24, 1995. Multiple-authored papers should specify the name and address of the author who is to receive all subsequent correspondence. Authors will be notified of acceptance by August 22, 1995, at which time they will also receive detailed instructions for the preparation of their papers for the Conference Proceedings. Plenary Speaker: Prof. Alan Laub (UCSB), ``The Matrix Sign Function'' Conference Co-Chairs: Sean Meyn and Ken Zeger (email: allerton@tornado.csl.uiuc.edu) url: http://tesla.csl.uiuc.edu/allerton/ COORDINATED SCIENCE LABORATORY AND DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contrinbuted by: "H.L. Trentelman" Workshop on the occasion of the Bernoulli year 1995 CONTROL OF UNCERTAIN SYSTEMS From the Calculus of Variations to Optimal and Robust Control Groningen, The Netherlands, August 29 - September 1, 1995 Keynote Speakers: F.H. CLARKE (Universite' de Montre'al) The historically persistent issue of nonsmoothness in dynamic optimization J.C. DOYLE (Caltech) A behavioral approach to the control of uncertain systems K. GLOVER (Cambridge University) Robust applied control M.L.J. HAUTUS (Eindhoven University) The development from the calculus of variations to optimal control H.H. ROSENBROCK (Manchester) Human purpose and machines H.J. SUSSMANN (Rutgers University) 300 years of optimal control: From the brachistochrone through the calculus of variations to the maximum principle and beyond Other Speakers: A. Antoulas (Houston, USA) P. Bendotti (Paris, France) S. Bhattacharyya (College Station, U.S.A) S. Boyd (Berkeley, USA) F. Colonius (Augsburg, Germany) M. A. Dahleh (Cambridge, USA) R. D'Andrea (Pasadena, USA) F. Fagnani (Pisa, Italy) P. Gahinet (Rocquencourt, France) T. T. Georgiou (Minneapolis, USA) M. Green (Canberra, Australia) C. Heij (Rotterdam, The Netherlands) U. Helmke (Regensburg, Germany) V. Kharitonov (St. Petersburgh, Russia) H. Kimura (Osaka, Japan) D. J. N. Limebeer (London, England) H. Logemann (Bath, England) D.H. Owens (Exeter, England) F. Paganini (Pasadena, USA) I. R. Petersen (Campbell, Australia) J. W. Polderman (Enschede, The Netherlands) D. Pratzel Wolters (Kaiserslautern, Germany) A. Pritchard (Warwick, England) L. Qui (Hong Kong) A. Rantzer (Lund, Sweden) E. Ryan (Bath, England) C. Scherer (Delft, The Netherlands) A. A. Stoorvogel (Eindhoven, The Netherlands) <--- R. Tempo (Torino, Italy) S. Townley (Exeter, England) A. Tits (Maryland, USA) A.J. Van der Schaft (Enschede, The Netherlands) G. Weiss (Beer Sheva, Israel) P. Whittle (Cambridge, England) V. Yacubovitch (St. Petersburg, Russia) J. Zabczyk (Warsaw, Poland) Program Committee: R.F. Curtain D. Hinrichsen A. Pritchard J.C. Willems Organizing Committee: J.W. Nieuwenhuis C. Praagman H.L. Trentelman 1995 is the Johann Bernoulli year in Groningen. It is exactly 300 years since he was appointed a Professor of Mathematics at the University of Groningen. The workshop is being held to mark this occasion. It is also part of an EEC Collaborative Grant between the Universities of Warwick, Bremen, and Groningen. Those who wish to attend the workshop should apply before June 1, 1995 to H.L. Trentelman Mathematics Institute P.O. Box 800 9700 AV Groningen The Netherlands Email: h.l.trentelman@math.rug.nl *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Petko Petkov NATIONAL CONFERENCE WITH INTERNATIONAL PARTICIPATION AUTOMATICS AND INFORMATICS'95 November 7-9, 1995 Sofia, Bulgaria FIRST ANNOUNCEMENT TOPICS AND THEMES * Control theory * Modelling and identification * Adaptive and robust control * H-infinity control * Intelligent control * Process control * Low cost automation * Sensors * Robotics and automotive control * Environment protection * Distributed computer systems * Computer networks * New information technologies * Artificial intelligence * Parallel algorithms * Neural networks * Data analysis * Business informatics PAPERS Prospective authors should submit a two page summary to the Technical Secretariat by April 15, 1995. The authors will be notified for the acceptance of their papers by June 1. The full papers must be submited in two copies by July 15, 1995. INVITED SESSIONS Proposals for invited sessions should be submitted by April 15, 1995. Each invited session should comprise four or five lectures of 30 minutes each. The proposal should contain the title and author's name of each lecture. TIME AND LOCATION The conference will take place from Tuesday November 7 to Thursday November 9, 1995 in the House of Science and Technics of the Bulgarian Uion of Automatics and Informatics, Sofia. REGISTRATION FEE The registration fee of the conference is 100 US $. ACCOMODATION Information about hotel reservations will be provided to participants. TECHNICAL SECRETARIAT Mrs. Margarita Grigorova AUTOMATICS AND INFORMATICS'95 Union of Automatics and Informatics 108 Rakovsky Str. 1000 Sofia, Bulgaria Fax: +359 2 801230 *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Oded.Maler@imag.fr The Second European Workshop on Hybrid Systems ============================================== Date: 31.5-2.6.95 Place: Grenoble, France. Hybrid systems, namely systems in which computers interact with the physical world, are becoming more and more common in all application domains. The analysis and design of such systems require a synthesis of ideas, concepts, mathematical theories and tools that are currently spread over distinct disciplines, most notably Computer Science and Control Theory. The goal of this meeting is to contribute to the reapproachment between those disciplines, by inviting together computer scientists and control persons to an informal meeting in which various approaches to the problem will be presented and discussed. The emphasis in this workshop, sponsored by the ESPRIT-NSF project HYBRID EC-US-043, will be on two issues: * What are the differences between the type of questions asked in program verification (purely discrete systems) and in control theory (purely continuous systems)? What are the explicit and implicit assumptions behind the answers? What is the role of formal methods (or other tools such as simulators) in actual engineering practice in both types of systems? * Case studies and tool demonstration: participants are encouraged to prepare small real-world examples of hybrid control problems and demonstrate on those examples how their proposed methodology works. Tools for automatic analysis and simulation of hybrid systems will be presented. It is highly recommended that the goal of building bridges between disciplines be kept in mind. The presentation should be as clear as possible for the non-expert in the presenter's discipline, rather than a demonstration of virtuosity in his or her particular technical niche. The following speakers will present review/tutorial talks on various relevant aspects of hybrid systems: Eugene Asarin, Inst. for Problems of Information Transmission, Russian Academy of Science, Moscow, Russia. Zvi Artstein, Department of Mathematics, Weizmann Institute, Rehovot, Israel. Michel Fliess, Laboratory of Signals and Systems, Gif-sur-Yvette, France. Bud Mishra, Courant Institute, New York University, USA. Anil Nerode, Mathematical Sciences Research Institute Cornell University. Ithaca, USA. Amir Pnueli, Department of Computer Science, Weizmann Institute, Rehovot, Israel. Frits Vaandrager, CWI, Amsterdam, Holland. The meeting will be rather informal and those who wish to present their work are requested to send a short abstract (3-6 pages) to the selection committee. Others who wish to participate or demonstrate a tool should send (preferably by e-mail) a short description of their interests and previous work on hybrid systems to the selection committee. The deadline is 15.3.95. Proceedings will be distributed only for the participants. The registration fees have not yet been determined but they will not be prohibitive (around 1000 FF including lunches). Organizing committee: Oded Maler, Ahmed Bouajjani. Selection committee: Mats Andersson (Lund), Albert Benveniste (Rennes), Ahmed Bouajjani (Grenoble, co-chair), Oded Maler (Grenoble, co-chair), Amir Pnueli (Rehovot and Grenoble), Anders Ravn (Lyngby), Hans Rischel (Lyngby), Joseph Sifakis (Grenoble). For further information contact: Oded Maler, VERIMAG, 38330 Montbonnot, France. Phone: +33 76909635 Fax: +33 76413620 E-mail: Oded.Maler@imag.fr *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: bogardo@siam.org Travel Support for ICIAM 95 SIAM is administering a travel grant program for ICIAM 95 -- the third International Congress on Industrial and Applied Mathematics -- to be held in Hamburg, Germany, July 3-7. The grants, which are funded by the National Science Foundation and the Department of Energy, will provide partial travel support to qualified applicants. The awards are intended primarily for young researchers and graduate students; women and minorities are especially encouraged to apply. APPLICANTS MUST BE AFFILIATED WITH U.S. INSTITUTIONS. Awards will be based on merit. Preference will be given to participants in the ICIAM 95 program and to applicants who do not have other travel support for the meeting. Typical anticipated awards will range from $800 to $1000. Travel costs will be reimbursed up to the amount of the award on submission of a signed travel expense from to SIAM. The cutoff date for applications is March 15, and final decisions will be made no later than April 15. Early submission of applications is encouraged; whenever possible, SIAM will make decisions and notify applicants as the applications are received. ----------------------------------------------------------------- For application details send an E-mail to bogardo@siam.org or contact ICIAM 95 Coordinator c/o SIAM 3600 University City Science Center Philadelphia, PA 19104-2688 *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: M. Vidyasagar (sagar@cair.ernet.in) INTERNATIONAL SYMPOSIUM ON INTELLIGENT ROBOTIC SYSTEMS (ISIRS '95) NOVEMBER 22-24, 1995, BANGALORE, INDIA FIRST CALL FOR PAPERS Following the success of the First and Second International Symposia for Intelligent Robotics (ISIR '91) and {ISIR '93), it is planned to organize the International Symposium on Intelligent Robotic Systems (ISIRS '95) in Bangalore, India during November 22-24, 1995. The change of name reflects a broadening of the scope of the symposium to encompass not merely robotic systems but intelligent systems of all kinds. As on past occasions there will be two or three plenary speakers from various parts of the world. In addition, there will be a one-day tutorial on "Neural Networks and Fuzzy Logic for Intelligent Control" on November 21. A full social program for accompanying persons as well as pre- and post- symposium tours will be organized. Of special interest to control and system theorists is the fact that this year's symposium will contain some papers on topics such as -- Computational learning theory -- Worst-case and H-infinity identification -- Neural networks and neurodynamics -- Intelligent Control and allied topics. The weather in Bangalore in November will be delightful. The dates of the symposium are chosen to coincide with the U.S. Thanksgiving week. The symposium will be held at the five-star Hotel Ashok, where the special symposium rates are $ 60 for a single and $ 70 for a double room (cheap!). There are several interesting places to see in and around Bangalore, ranging from 900 year-old temples to wildlife sanctuaries. Previous symposia have seen about 40 overseas papers, and this year's symposium should have even more. See you in Bangalore in November! SCOPE OF THE SYMPOSIUM The scope of the symposium will cover the general areas of intelligent robotics and intelligent systems. It will encompass but not be limited to: -- Robot Control -- Motion and Trajectory Planning -- Grasping -- Mobile Robots -- Vision and Sensing -- Image Analysis -- Virtual Reality -- Computational Algebra and Geometry -- Neural Networks -- Computational Learning Theory -- Intelligent Control -- Factories of the Future IMPORTANT DEADLINES Submission of Extended Abstracts July 31, 1995 Notification of Acceptance August 31, 1995 Final Version of Abstracts Due September 30, 1995 Finished Papers Due November 22, 1995 Dates of the Symposium November 22-24, 1995 INSTRUCTIONS TO AUTHORS Authors are requested to send an extended abstract of 1,000 to 1,500 words describing their contribution to either of the following: General Chairman of the Symposium M. Vidyasagar, Director Centre for Artificial Intelligence and Robotics Raj Bhavan Circle, High Grounds Bangalroe 560 001, INDIA E-Mail: sagar@cair.ernet.in Co-Chairman of the Symposium Mark W. Spong Coordinated Sciences Laboratory University of Illinois at Urbana-Champaign Urbana, IL 61801 U.S.A. E-Mail: spong@lagrange.csl.uiuc.edu ****************************************** * * * THE END * * * ******************************************