E-LETTER on Systems, Control, and Signal Processing ISSUE No. 13, 11 August 1988 Editors: Bradley W. Dickinson Dept. of Electrical Engineering Princeton University Princeton, NJ 08544 bradley@princeton.edu Eduardo D. Sontag Dept. of Mathematics Rutgers University New Brunswick, NJ 08903 sontag@fermat.rutgers.edu (arpanet) or sontag@pisces (bitnet) Welcome to the thirteenth issue of the E-LETTER. We remind you that items for posting can be emailed to either of the editors. PLEASE SEND CONTRIBUTIONS, since the eletter can only be useful if everyone participates! Back issues of the newsletter can be requested from Sontag at either of the above addresses. NOTE: 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: *.** Contents Changes to mailing list Program for 1988 Digital Signal Processing Workshop Call for Papers, 1989 ACC Announcements Chaired Professorship Opening at University of Maryland Reminders: (see issue 12 for more details) NATO ASI on Orthogonal Polynomials and Their Applications 1989 International Symposium on on the Mathematical Theory of Networks and Systems (MTNS) *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** CHANGES TO MAILING LIST The following are changes to the mailing list which was included with issue #2. An up-to-date copy of the complete list can be obtained from sontag@fermat.rutgers.edu. As usual, you may have to adjust the format depending on your mailer. Here we mix uucp, csnet, and arpanet formats. Corrected and updated addresses: kehtar@ee.tamu.edu (Nasser Kehtarnavaz) adw@research.att.com (Aaron Wyner) herro@ndsun.ee.nd.edu (Mark A. Herro) dan@ndsun.ee.nd.edu (Dan Costello) barmish@apollo.ece.wisc.edu (Bob Barmish) change cobb@h8001.cae.wisc.edu (Daniel Cobb) elroy@uwo.ca (Roy Eagleson) Additions: agw@convent.cs.columbia.edu (Art Werschulz) arun@uicsl.csl.uiuc.edu (K.S. Arun) steve@note.nsf.gov (Stephen S. Wolff) kuh@esvax.berkeley.edu (Ernest Kuh) ghs@emx.utexas.edu (Galen Sasaki) marcus@ibm.com (Brian Marcus) dahleh@lids.mit.edu (Munther Dahleh) mitra@hub.ucsb.edu (Sanjit Mitra) rlh@doc.eng.ohio-state.edu (R. Lee Hamilton, Jr.) *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** >From Don Johnson The 1988 Digital Signal Processing Workshop will be held September 15-17, 1988 at the Stanford Sierra Camp, Lake Tahoe, California. Information and registration forms can be obtained by sending e-mail to David Munson at the University of Illinois (munson@uicsl.csl.uiuc.edu). The papers that will be presented are: Thursday, September 15 Plenary Session I An Overview of Neural Networks Thomas Goblick MIT Lincoln Laboratory Session 1: Fast Algorithms and Architectures Chair: Professor C.S. Burrus, Department of Electrical and Computer Engineering, Rice University Time: 10 AM Thursday, September 15 1.1 The Tensor Product in Algorithm Design L. Auslander, Center for Large Scale Computation, City University Graduate School. 1.2 Fourier Transform Algorithms for Vector and Parallel Machines R. Agarwal, J. W. Cooley, IBM Watson Research Center 1.3 A Self-Sorting In-Place Generalized Prime Factor FFT Algorithm For Any N=2**p 3**q 5**r C. Temperton, Recherche en Prevision Numerique 1.4 Computation of a Subset of DFT Points H. V. Sorensen, Department of Electrical and Computer Engineering, University of Pennsylvania; C. S. Burrus, Department of Electrical and Computer Engineering, Rice University 1.5 Quantization Effects in the FFT Revised R. Meyer and H. W. Schussler, Lehrstuhl fur Nachrichtentechnik, Universitat Erlanger-Nurmberg 1.6 Split-Radix Transform and Running Convolution Algorithms: Recent Results and Directions P. Duhamel, M. Vetterli, Department of Electrical Engineering, Columbia University 1.7 Impact of DSP Devices on Fast Algorithms P. E. Papamichalis, Texas Instruments, Inc. 1.8 A Signal Processing Compiler That Uses Architectural Advice J. E. Peters, S. M. Dunn, B. Finkel, L. Neafsey, Department of Electrical and Computer Engineering, Rutgers University 1.9 Clutter Classification in an Incoherent Radar Environment A. Ukrainec, S. Haykin, Communications Research Laboratory, McMaster University 1.10 A Dynamical System for Pattern Classification M. R. Sayeh, F. Pourboghrat, Department of Electrical Engineering, Southern Illinois University at Carbondale 1.11 The PATHFINDER System: A Neural Network Formulation for the Traveling Salesman Problem O. Farotimi, A. Dembo, T. Kailath, Department of Electrical Engineering, Stanford University Session 2: Signal Reconstruction, Estimation & Detection Chair: Professor Thomas W. Parks, Department of Electrical Engineering, Cornell University Time: 8 PM Thursday, September 15 2.1 A Linear Time-Varying Framework for Interpolation from Nonuniformly Spaced Samples G. Kakazu, D. C. Munson, Jr., Coordinated Science Laboratory and Elec. Eng. Dept., University of Illinois 2.2 Ill-Conditioned Signal Restoration and the Conjugate Gradient Method B. J. Sullivan, Department of Electrical Engineering and Computer Science, Northwestern University 2.3 Weighted Spectral Estimation and Optimal Recovery T. W. Parks, R. G. Shenoy, Department of Electrical Engineering, Cornell University 2.4 Minimum-Norm Positive Semi-Definite Bandlimited Extrapolation L. C. Potter, K. S. Arun, Coordinated Science Laboratory, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign 2.5 Reconstruction of Deterministic Signals from Multiple Correlations: A Time-Domain Approach G. B. Giannakis, Department of Electrical Engineering, University of Virginia 2.6 Adaptive Smoothing in Wigner Distribution Domain S. Kadambe, P. Duvuat, F. Boudreaux-Bartels, Department of Electrical Engineering, University of Rhode Island 2.7 Fine Crackle Characterization with Modeling of the Reconstructed Wigner-Ville Kernel E. Verreault, H. H. Tue, Department of Electrical Engineering, Universite Laval 2.8 Shape Invariant Time-Scale Modification of Speech T. F. Quatieri, R. J. McAulay, MIT Lincoln Laboratory 2.9 Application of Cepstral Methods to the Analysis of Acoustic Signals from Vehicles J. C. Rogers, R. T. Sokolov, Electrical Engineering Department, Michigan Technological University 2.10 Constrained Deconvolution: Penalty Function or Lagrange Multipliers G. Thomas, Departement de Mathematiques Informatique Systemes, Ecole Centrale de Lyon 2.11 Accurate Parameter Estimation for Noisy Autoregressive Processes H. M. Dante, Department of Electrical Engineering, Tufts University 2.12 A New Phase Correction Method for Synthetic Aperture Radar P. H. Eichel, D. C. Ghiglia, C. V. Jakowatz, Jr., Sandia National Laboratories 2.13 Helical Scan Computerized Tomography Y. Bresler, C. J. Skrabacz, Coordinated Science Laboratory, University of Illinois at Urbana-Champaign 2.14 Effect of Ideal Transistion Specification on Window Designs R. M. Mersereau, Z. Shen, M. H. Hayes, III, School of Electrical Engineering, Georgia Institute of Technology Friday, September 16 Plenary Session II Chaos in Time Series John Sidorowich University of California, Santa Cruz Session 3: Adaptive Beamforming Chair: Dr. Benjamin Friedlander, Saxpy Computer Corporation Time: 10 AM Friday, September 16 3.1 Adaptive Beamforming for Large Arrays B. Friedlander, Saxpy Computer Corporation 3.2 Beam-Based Adaptive Processing for Planar Arrays S. G. Kratzer, Supercomputing Research Center 3.3 High Resolution Detection of Coherent Sources Based on Nonuniform Linear Arrays G. Xu, T. Kailath, Information Systems Laboratory, Department of Electrical Engineering, Stanford University 3.4 Modified Pisarenko's Method for DOA Estimation - A Performance Study R. R. Gopal, P. R. Rao, Department of Electronics and Communication Engineering, Regional Engineering College 3.5 A Novel Matrix Decomposition Technique to Estimate DOA in a Passive Sonar in the Presence of Unknown Correlated Noise Fields R. R. Gopal, P. R. Rao, Department of Electronics and Communication Engineering, Regional Engineering College 3.6 Interference Cancellation by Eigenanalysis Methods A. Haimovich, Y. Bar-Ness, Department of Electrical Engineering, New Jersey Institute of Technology 3.7 Angle of Arrival Estimation Based on First-Order Statistics S. U. Pillai, Y. Lee, D. C. Youla, Department of Electrical Engineering and Computer Science, Polytechnic University 3.8 Separable Spectral Estimation Methods for Retrieval of 2-D Harmonics L. Yin, L. Zou, Department of Information and Control Engineering, Xi'an Jiaotong University 3.9 Auto-Cancellation of Unwanted Sound Emanating from Source with Unknown Parameters - A Self-Adaptive Approach in the Time Domain P. Mookerjee, Electrical Engineering Department, Villanova University Session 4: Signal Modeling & Representation Chair: Professor James H. McClellan, School of Electrical Engineering, Georgia Institute of Technology Time: 10 AM Friday, September 16 4.1 Linear Predictive Transform: A Unified Approach to Signal Modeling, Coding, Estimation, and Control E. H. Feria, Department of Applied Sciences, College of Staten Island of the City University of New York 4.2 A New Idea in the Coding of Speech Waveform Using Vector Quantization and a Solution to the Matching Problem in $L^\infty$-norm A. K. Nandi, A. G. Constantinides, I. Dologlou, Department of Electrical Engineering, Imperial College of Science and Technology; M. F. Aburdene, Department of Electrical Engineering, Bucknell University 4.3 A Two-Band Self-Excited Vocoder for 2.4 to 4.8 Kbps Speech Coding K. Nayebi, T. P. Barnwell, M. J. T. Smith, School of Electrical Engineering, Georgia Institute of Technology 4.4 Noise Suppression with Two Microphone Signals using Fourier-Bessel Coefficient Representation of Speech and Noise F. S. Gurgen, C. S. Chen, Department of Electrical Engineering, The University of Akron 4.5 Hidden Markov Models with Embedded Equalization for Noisy Observations B. H. Juang, AT&T Bell Laboratories 4.6 Transforms and Models for Representation of Second- Order Inhomogeneous Random Fields L. H. Sibul, Applied Research Laboratory, Pennsylvania State University; J. A. Tague, Department of Electrical & Computer Engineering, Ohio University 4.7 Partial Realization, Berlekamp-Massey Algorithm and Modelling of Discrete-Time Signals S. K. Mullick, P. Jain, A. Kumar, Department of Electrical Engineering, Indian Institute of Technology 4.8 Extensions of Scale-Space Filtering: Fingerprint Theorems for the General Level Crossing Problem and for Bandlimited Filtering Operators B. W. Zuerndorfer, G. H. Wakefield, Department of Electrical Engineering and Computer Science, University of Michigan Session 5: Robust Signal Processing Chair: Professor Don H. Johnson, Department of Electrical and Computer Engineering, Rice University Time: 8 PM Friday, September 16 5.1 Robust Estimation via Incorporation of Constraints and Grammars Michael I. Miller, Electronics, Systems, and Signals Research Laboratory and Department of Electrical Engineering, Washington University 5.2 Robust Signal Detection and Estimation: An RKHS Approach R. J. Barton, H. V. Poor, Department of Elec. & Comp. Eng. and Coordinated Science Lab, University of Illinois 5.3 Performance Analysis of Nonlinear Signal Detectors G. Orsak, B. Aazhang, Department of Electrical and Computer Engineering, Rice University 5.4 Robustness Measures for Signal Detection in S- Contaminated Noise M. W. Thompson, Department of Electrical Engineering, Colorado State University 5.5 Distributed Detection in Jamming Environment N. Sayiner, R. Viswanathan, Department of Electrical Engineering, Southern Illinois University at Carbondale 5.6 A New Approach to the Estimation of Parameters of Truncated Multi-Dimensional Normal Distributions J. Huang, J. Cartinhour, School of Electrical & Computer Engineering, Oklahoma State University 5.7 Robust Estimation of Random Integrals from Noisy Observations L. Hambaba, Stevens Institute of Technology 5.8 Nonlinear Filters for Robust Frequency Selective Filtering P. P. Gandhi, S. A. Kassam, Department of Electrical Engineering, University of Pennsylvania 5.9 Directionality and Reversibility in Time Series Analysis A. J. Lawrence, Department of Statistics, University of Birmingham 5.10 Generation of Linear, First-Order, Non-Gaussian Time Series D. H. Johnson, P. S. Rao, Department of Electrical and Computer Engineering, Rice University Saturday, September 17 Plenary Session III The Rediscovery of the Fast Fourier Transform Algorithm James W. Cooley IBM Watson Research Center Session 6: Adaptive Filtering Chair: Assistant Professor S.T. Alexander, Electrical & Computer Engineering Department, North Carolina State University Time: 10 AM Saturday, September 17 6.1 Time-Domain Performance Functions for Frequency-Domain Adaptive Filters J. R. Treichler, M. G. Larimore, Applied Signal Technology, Inc., S. L. Wood, Department of Electrical Engineering and Computer Science, Santa Clara University 6.2 A New Class of Pure Order Recursive Ladder Algorithms J. Sokat, Universitat Duisburg, Department of Communication Theory; P. Strobach, Siemens AG 6.3 An Advanced DSP Code Generator for Adaptive Filters S. M. Kuo, G. K. Ma, C. C. Chen, P. Gupta, Department of Electrical Engineering, Northern Illinois University 6.4 Structurally Adaptive Signal Processing Systems J. Sztipanovits, D. M. Wilkes, Department of Electrical Engineering, Vanderbilt University 6.5 Optimal and Adaptive Filter Systems S. A. Katz, Department of Geological Sciences, University of Southern California 6.6 An Introduction to Adaptive Filtering using Homotopy Methods S. T. Alexander, V. Lessmann-Stonick, Department of Electrical and Computer Engineering, North Carolina State University 6.7 Adaptive Design of IIR Filters using Reinforcement Learning Techniques S. Y. Goldsmith, Sandia National Laboratories; D. M. Etter, Electrical amd Computer Engineering Department, University of New Mexico 6.8 An Adaptive Decision Feedback Equalizer for the Mitigation of Nonlinear Intersymbol Interference and Transition Dependent Noise Thin-Film Storage Channels K. Fisher, J. Cioffi, Information Systems Laboratory, Stanford University 6.9 Pipelining the Decision Feedback Equalizer J. Cioffi, P. Fortier, S. Kasturia, Information Systems Laboratory, Stanford University 6.10 An ODE Approach for Analyzing the Tracking Behavior of Adaptive Algorithms B. D. Rao, Department of Applied Mechanics and Engineering Sciences, University of California, San Diego 6.11 The Baseband Modulus Restoral Approach to Blind Adaptive Signal Demodulation B. G. Agee, AGI Engineering Consulting 6.12 Single Channel Adaptive Preprocessing Techniques for Interference Suppression E. H. Sartorius, T. C. Jedrey, Jet Propoulsion Laboratory 6.13 Some Issues in the Finite Precision Implementation of RLS Algorithms S. Ardalan, Center for Communications and Signal Processing, North Carolina State University *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** >From K.S. Arun Publicity Chairman CALL FOR PAPERS: AMERICAN CONTROL CONFERENCE The Pittsburgh Hilton and Towers, Pittsburgh, Pennsylvania The American Automatic Control Council will hold the eighth American Control Conference (ACC) on June 21-23, 1989, at the Pittsburgh Hilton and Towers, Pittsburgh, Pennsylvania. This conference will bring together people working in the fields of control, automation and related areas from the American Institute of Aeronautics and Astronautics (AIAA), American Institute of Chemical Engineers (AIChe), American Society of Mechanical Engineers (ASME), Association of Iron and Steel Engineers (AISE), Institute of Electrical and Electronics Engineers (IEEE), Instrument Society of America (ISA), and the Society for Computer Simulation (SCS). Both contributed and invited papers will be included in the program. The ACC will cover a range of topics relevant to theory and practical implementation of control and industrial automation and to university education in controls. Topics of interest include but are not limited to linear and nonlinear systems, identification and estimation, signal processing, multivariable systems, large scale systems, robotics and manufacturing systems, guidance and control, sensors, simulation, adaptive control, optimal control, expert systems, and control applications. Schedule Summary Sept.15, 1988: Deadline for contributed papers Deadline for request on invited sessions Nov. 1, 1988: Deadline for final submission of completed invited session forms Feb. 1, 1989: Announcement of final selection of contributed papers and invited sessions Mar. 15, 1989: Deadline for typed mats for Proceedings For further information contact: GENERAL CHAIRMAN Prof. H. Vincent Poor Coordinated Science Laboratory University of Illinois at Urbana-Champaign 1101 West Springfield Avenue Urbana, Illinois 61801 USA (217) 333-6449 PROGRAM CHAIRMAN Prof. Marija Ilic LEES, Bldg. 10-059 Massachusetts Institute of Technology Cambridge, Massachusetts 02139 USA (617) 253-4682 Call for Contributed Papers The 1989 ACC Program Committee is soliciting two types of papers in all areas of control and automation: (a) regular papers describing work in some detail, and (b) short papers which present recent results. All papers accepted for presentation will appear in the Conference Proceedings. Instructions to Authors Prospective authors of regular papers should submit six(6) copies of the complete manuscript. Regular papers should be marked "1989 ACC" and should be submitted by September 15, 1988, to one of the SOCIETY REVIEW CHAIRMEN. At the author's request, the regular papers will be considered for journal publication provided the rules of the society's journal for submission of prospective manuscripts are followed. Short papers should consist of a 700-word (2-3 page) summary. Short papers, which will not be considered for journal publication, should be submitted by September 15, 1988, the the PROGRAM VICE-CHAIRMAN FOR CONTRIBUTED SESSIONS. All regular and short papers should clearly describe the problem being addressed, the analytical or experimental techniques employed, the new results obtained, and relevant references. Call for Invited Sessions The Program Committee is also soliciting proposals for invited sessions for the conference. Prospective organizers should contact the PROGRAM VICE-CHAIRMAN FOR INVITED SESSIONS before September 15, 1988, to obtain the forms on which invited session proposals are to be submitted. Each invited session may include a panel discussion following the presentations. Subsequent submission of reports on the panel discussion for publication under the sponsorship of the ACC in one of the participating societies' journals will be encouraged. Session organizers must submit by November 1, 1988, the completed invited session forms, including a session summary and abstracts for the invited papers. Author Notification The final selection of contributed and invited sessions will be announced by February 1, 1989, at which time the authors' kits will be mailed to the corresponding authors with the mats on which papers are to be typed. For inclusion in the Proceedings, the deadline for papers typed on mats will be March 15, 1989. Authors will be requested to limit their manuscripts to six proceedings pages. Short papers will be limited to two proceedings pages. There will be an extra per page charge for papers exceeding the above length. ACC Workshops The Organizing Committee intends to arrange workshops to be held in conjunction with the 1989 ACC. Suggestions are solicited for appropriate subjects. Potential organizers should contact the Special Events Chairman, Michael K. Masten, or the General Chairman. Program Vice Chairman C. Richard Johnson, Jr. for Invited Sessions School of Electrical Engineering Phillips Hall Cornell University Ithaca, NY 14853 (607) 255-3433 Program Vice Chairman Kamal Youcef-Toumi for Contributed Sessions Dept. of Mechanical Engineering Bldg. 35-233 Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge, MA 02139 (617) 253-2216 Finance Chairman Program Committee Members Marwan Simaan Milton B. Adams Duncan A. Mellichamp Local Arrangements Chairman Panos J. Antsaklis Michael G. Rekoff, Jr. Eugene O. King Peter Dorato Ali Saberi Registration Chairman Gai Elizer Masayoshi Tomizuka Bruce Krogh Abraham H. Haddad Lin Song Tung Publications Chairman Jeffrey Kantor Galip A. Ulsoy Peter J. Ramadge Hassan Khalil Sergio Verdu Publicity Chairman Naim Kheir George C. Verghese K. S. Arun John Luh Dhani Watanapongse Special Events Chairman Dennis G. Manzer Baxter F. Womack Michael K. Masten Society Review Chairmen AIAA IEEE Milton B. Adams Abraham H. Haddad Automated Planning Section School of Electrical Engineering System Sciences Division Georgia Institute of Technology Charles Stark Draper Lab., Inc. Atlanta, GA 30332-0250 555 Technology Square (404) 894-2983 Cambridge, MA 02139 (617) 258-3185 AIChE ISA Duncan A. Mellichamp Michael G. Rekoff, Jr. Dept. of Chem. & Nuc. Eng. Dept. of Electrical Engineering University of California University of Alabama at Birmingham Santa Barbara, CA 93106 Birmingham, AL 35294 (805) 961-3411 (205) 934-8440 ASME SCS Masayoshi Tomizuka Baxter F. Womack Dept. of Mech. Engr. Dept. of Electrical Engineering University of California ENS-143 Berkeley, CA 94720 University of Texas at Austin (415) 642-0870 Austin, TX 78713 (512) 471-3732 AISE Dhani Watanapongse Inland Steel Research 3001 East Columbus Drive East Chicago, IN 46312 (219) 399-6322 *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** ANNOUNCEMENTS >From Graham Goodwin: email c/o evans@nucs.oz.au The Department of Electrical Engineering and Computer Science at the University of Newcastle in Australia has recently been awarded the status of a Special Research Centre in the area of Industrial Control Science. It is one of only 15 such centres in Australia in all disciplines. The Director of the Centre will be Graham Goodwin. Other key people involved in the Centre will be Rob Evans, David Hill, Rick Middleton, Iven Mareels, Peter Moylan, and Carlos de Souza. The Centre has funds for visitors, postdocs, etc. Contact Graham Goodwin for futher information: Centre for Control Science, Newcastle University, Newcastle, NSW 2308, Australia. >From Eduardo Sontag: Rutgers Center for Systems and Control (SYCON) Rutgers University has now formally created a Center for Systems and Control, the SYCON Center. The objective of SYCON is to foster research on areas related to Mathematical aspects of Control and Systems Theory. Among other activities, a seminar and a Technical Report series have been started. Those wishing to receive electronic abstracts of Tech reports should send a request to sontag@fermat.rutgers.edu or to sussmann@pisces.bitnet. The e-letter will carry titles of reports as these appear. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** >From John Baras: MARTIN MARIETTA CHAIR IN SYSTEMS ENGINEERING The University of Maryland College Park campus invites applications from highly qualified individuals for the newly established Martin Marietta Chair in Systems Engineering. The holder of this endowed chair will have a permanent joint appointment both in the Systems Research Center and in a participating department. Tenure will be held in the participating department. The Systems Research Center is a Center for Excellence in Engineering Research established in 1985 through a grant from the National Science Foundation. It receives significant support from the state of Maryland and from several large corporations. The Center, which has extensive laboratory and computational facilities, shares a new building with the Institute for Advanced Computer Studies on the College Park Campus. Applicants should have breadth and outstanding records of research in such fields as automation and process control, communication systems and information processing, and the applications of computer technology in these fields. They should be able to provide leadership in research, to teach effectively, and to establish significant collaborations with industrial researchers and engineers. The salary, which will be commensurate with the outstanding qualifications required of the appointee, will be subject to negotiation. Funds will also be available to the Chair to support graduate students, visitors, secretarial staff, travel, and equipment. Candidates should send their vitae to Stuart S. Antman, Professor of Mathematics, Chairman of the Search Committee, Systems Research Center, University of Maryland, College Park, MD 20742. Every effort will be made to respect requests of confidentiality. Applications received by December 1, 1988 are assured of being considered. The search will continue until the position is filled. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** >From the Editors: Reminders of meetings announced previously. NATO Advanced Study Institute (Paul Nevai, Director) on Orthogonal Polynomials and Their Applications, The Ohio State University, Columbus, Ohio 43210, U.S.A. May 22, 1989 - June 3, 1989. Attendance is strictly by application/invitation only, and it is limited to approximately one hundred participants. Information from Paul Nevai: Email: ts1171@ohstvma.bitnet pgn@osupyr.mast.ohio-state.edu Phone: 1-(614)-292-4975 1-(614)-292-5310 1989 International Symposium on the Mathematical Theory of Networks and Systems (MTNS-89), June 19-23, 1989, Amsterdam, The Netherlands To obtain the printed version of the First Announcement and Call for Papers, that contains instructions for authors of full papers, posters, and organizers of special sessions, write to: Stichting International Symposium MTNS-89 c/o Bureau Congreszaken (Conference Service) Vrije Universiteit P.O. Box 7161 1007 MC Amsterdam The Netherlands A Call for Papers has been distributed by use of several mailing lists in May 1988. Full announcements for these meetings are in Issue 12 of the E-LETTER *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** End of Issue 13