IPNet Digest Volume 2, Number 09 October 1, 1995 Today's Editor: Patricia K. Lamm Michigan State University Today's Topics: Conference: Inverse problems of Wave Propagation/Diffraction Conference: Inverse Problems in Engineering: Theory and Practice Conference: SIAM 1995 Annual Meeting" (and Other Conferences) Positions: Postdoc Positions in Industrial Math / Inverse Problems Comment: Relation of Current Engineering Practice to Inverse Problems Table of Contents: SIAM J. Mathematical Analysis Table of Contents: SIAM J. Control and Optimization Table of Contents: SIAM J. Applied Mathematics Table of Contents: Linear Algebra and Its Applications New Editors: Mathematics of Control, Signals, and Systems Submissions for IPNet Digest: Mail to ipnet-digest@math.msu.edu Information about IPNet: Mail to ipnet-request@math.msu.edu http://www.mth.msu.edu/ipnet.html ------------------------------ From: sance prenom Subject: to all members of the IPNet Date: Mon, 4 Sep 1995 CALL FOR PAPERS Conference on inverse problems of wave propagation and diffraction September 23-27, 1996, Aix les Bains (France) Conference chairs G. CHAVENT (Universite Paris-Dauphine/INRIA Rocquencourt,France) P. C. SABATIER (Universite de Montpellier II, France) Scientific committee M. BERTERO (Universita di Genova, Italy) G. CHAVENT (Universite Paris-Dauphine/INRIA Rocquencourt,France) M. CHENEY (Rensselaer Polytechnic Institute, Troy, USA) D. COLTON (University of Delaware, Newark, USA.) H. W. ENGL (Johannes-Kepler-Universitaet, Linz, Austria) R. EWING (Texas A&M University, College Station, USA) A. FRIEDMAN (University of Minnesota, Minneapolis, USA) R. KRESS (Universitaet Goettingen, Germany) K. KUNISCH (Technische Universitaet Berlin, Germany)) A. K. LOUIS (Universitaet Saarbruecken, Germany) W. RUNDELL (Texas A&M University, College Station, USA.) P. C. SABATIER (Universite de Montpellier II, France) W. SYMES (Rice University, Houston, USA) Program committee M. BERTERO (Universita di Genova, Italy) G. BEYLKIN (University of Colorado, Boulder, USA) K. CHADAN (Universite d'Orsay, France) G. CHAVENT (Universite Paris-Dauphine/INRIA Rocquencourt,France) M. CHENEY (Rensselaer Polytechnic Institute, Troy, USA) D. COLTON (University of Delaware, Newark, USA.) H. W. ENGL (Johannes-Kepler-Universitaet, Linz, Austria) R. EWING (Texas A&M University, College Station, USA) A. FRIEDMAN (University of Minnesota, Minneapolis, USA) A. GRUNBAUM (University of California, Berkeley, USA) P. JOLY (INRIA Rocquencourt, Le Chesnay, France) R. KLEINMAN (University of Delaware, Newark, USA) R. KRESS (Universitaet Goettingen, Germany) K. KUNISCH (Technische Universitaet Berlin, Germany) A. LOUIS (Universitaet Saarbruecken, Germany) A. MASMOUDI (Universite Paul Sabatier/CERFACS, Toulouse, France) J-C. NEDELEC (Ecole Polytechnique, Paris, France) R.G. NEWTON (Indiana University, Bloomington, USA) E. R. PIKE (Kings College Strand, London, UK) W. RUNDELL (Texas A&M University, College Station, USA) P. C. SABATIER (Universite de Montpellier II, France) P. SACKS (Iowa State University, Ames, USA) S. STR=D6M (The Royal Institute of Technology, Stockholm, Sweden) W. SYMES (Rice University, Houston, USA) W. TABBARA (Ecole Superieure d'Electricite, Jouy-en-Josas, France) Organization M.-C. SANCE (INRIA Rocquencourt, France) A. THEIS-VIEMONT (INRIA Rocquencourt, France) Presentation This conference will be the 4th of a series devoted to different fields of inverse problems. The first conference on Inverse Problems in Diffusion Processes was organized in 1994 in St Wolfgang, Austria. It focussed on inverse problems which appear in the mathematical formulation of diffusion processes, either transient (parabolic partial differential equations) or steady-state (elliptic pde's). All questions related to the ill-posed nature of these problems, to their numerical analysis or to their applications were on the agenda. The success of this conference which brought together a comparable number of Americans, Europeans and some representatives from East-European countries was particularly remarkable. The second and third conferences, planned for 1995, respectively in the US and in Germany will deal with inverse problems in the fields of geophysics and medical imaging. A fourth conference will be organized in 1996 in France on the general theme "Inverse Problems of Wave Propagation and Diffraction" (especially acoustic and elastic waves, electromagnetic waves, quantum waves). The well known annual meeting of Montpellier, called RCP264, will not take place in 1996, in order to enable its usual attendants interested by the above mentioned topics to attend the present conference. Objectives The suggested theme "Modeling, Mathematical Analysis, and Numerical Solution of Inverse Problems of Wave Propagation and Diffraction" follows the overall theme of the series, focussed on validating inverse problems. Thus, the conference, partly issued from applied mathematics and partly from mathematical physics, has a large variety of fields of application, giving it a strong multidisciplinary character. Furthermore, taking into account the mathematical aspects of the overall theme, this conference has quite a small intersection with the sessions devoted to inverse problems in conferences on acoustics, electromagnetism, or external geophysics. The conference will put the same emphasis on the three fundamental steps of inverse modeling : modeling of inverse problems of a certain field, mathematical analysis of these problems, numerical solving. The organizers hope, thanks to the multidisciplinary character of the targeted audience, to incite successful exchanges between the specialists in applied fields, and those whose academic background and interest are more centered on mathematics: the first bringing problems and original models, the second solid mathematical tools. The conference will host the workshop "Optimization of SER" organized by the GDR "Conception de Formes et de Calcul Scientifique", which will present the numerical results obtained by the participants on test problems already given out (end of 1994). Dates to remember Today : fill in and mail the reply-card to the INRIA conference office March 1st,1996 : contributions should be received by the INRIA conference office April 15, 1996 : notification of acceptance or rejection to the authors June 15, 1996 : mailing of the program September 23-27, 1996 : conference Instructions to authors Authors should send an abstract and a full paper, or, as a minimum, a one page abstract, in 3 copies, before March 1st, 1996. The accepted papers will be distributed to the participants. For sending contributions, please use only the following address : INRIA Rocquencourt M.-C. SANCE Relations exterieures Bureau des cours et colloques B.P. 105 78153 LE CHESNAY Cedex (France) Reply card Conference on inverse problems of wave propagation and diffraction September 23-27, 1996 Aix les Bains (France) - I intend to participate to the conference - I intend to submit a paper Subject area : Title : Name : First name : Affiliation: Address : City : Country : Telephone : Fax : Email : [ Note: In the interest of space, it is the IPNet policy to transmit messages in one language only. For a French version of the above announcement, please contact the organizers. -Ed. ] ------------------------------ From: kwoodbur@me.ua.edu (Keith A Woodbury) Subject: 2icipe Date: Wed, 6 Sep 1995 Please note the following annoucement and call for papers. This announcement also appears on the WWW at URL http://www.me.ua.edu/inverse/2icipe.html Thanks, Keith Woodbury (woodbury@me.ua.edu) Inverse Problems in Engineering First Announcement and Call for Papers/Posters 2nd International Conference on INVERSE PROBLEMS IN ENGINEERING: THEORY AND PRACTICE 9-14 June 1996 Port aux Rocs Le Croisic, France Background In engineering science, inverse approach is a discipline that is growing very rapidly. Inverse problems involve determining the unknown causes of known consequences. There are two main types: 1) The input estimation problem where the system parameters and output are known and for which the missing part of the input (boundary or initial conditions) are to be determined, and 2) The identification or parameter estimation problem, where the parameters are found given the input and output. This conference is a continuation of the June 1993 Palm Coast Conference. Each year for five years prior to the Palm Coast Conference, informal two-day seminars were organized by Professor J.V. Beck at Michigan State University. This conference also follows the November 1994 ISIP conference which was held in Paris. The French organizers of ISIP 94 join in support of this 1996 conference. Scope of the Conference The 1996 conference will address an exploding research area which already has had various practical applications. However, the industrial needs that are continuously increasing are far from being fulfilled. In fact, the refinement of numerical modeling, the intensive use of composite or other advanced materials, the improvement of data acquisition systems and emphasis on optimum design and control of highly sophisticated systems lead researchers to tackle new inverse problems. The past conferences and seminars on inverse problems have shown that there are many underlying common mathematical interests shared between the various branches of which have interests in inverse methods. This is essential to sustain the momentum which has been given to the field of applied inverse techniques and to reinforce the links between modeling and experimentation. The newest inverse techniques and applications will be presented. Several Keynote addresses from prominent researchers in the field will be delivered. The ongoing problem of determining optimum experiment design through synergy of analysis and experimentation will be especially considered. Outline The program will include sessions on the following topics: * Mathematical Aspects and Techniques for Inverse Problems Gradient Methods of Optimization Iterative Regularization Methods Methods for Multi-Dimensional Problems Existence/Uniqueness/Stability Analysis Filtering Techniques * Experimental Methods and Results Design of Experiments Process Control via Inverse Methods Signal and Noise Processing Measurement Models/Error Analysis Property Estimation Interface Problems * Heat Transfer Multi-mode Heat Transfer/Coupled Problems Identification of Unknown Sources Inverse Scattering and Tomography Inversion of Interferometric Data Design of Optimum Forming and Solidification Processes * Engineering Mechanics Fluid Mechanics/Rheology Nondestructive Testing Shape Optimization and Design Acoustic/Vibrations The conference will emphasize a broad range of deterministic and/or statistical mathematical computational and experimental approaches that can be applied to the solution of inverse and design problems. Inverse problems involving coupling between heat transfer and solid mechanics will be of special interest in this conference. Submission, Selection, Publication and Presentation of Contributed Papers Contributed papers are invited on original work in the above general areas. Presentations will be twenty-five minute talks followed by discussion. Authors should submit a one page abstract by October 15, 1995. Please use a format similar to that accompanying this announcement. Authors whose abstracts are accepted will be sent Author Kits which will include detailed instructions for preparation of the manuscript. Conference proceedings will be published in a bound volume and are included in the conference fee. Copies of final papers will be available at the conference, and it is anticipated that the bound volume will be available mailed to conference participants by September 1996. Deadlines Abstracts Due October 15, 1995 Notification of Abstract Acceptance December 1, 1995 Full Papers Due for Review February 15, 1996 Author Notification of Review Results April 1, 1996 Final Papers due May 15, 1996 Scientific Committee Honorary Chair J.V. Beck (USA) Chair D. Delaunay (France) Co-Chairs M. Raynaud (France) K. Woodbury (USA) O. Alifanov (Russia), E. Artyukhin (Russia), H.T. Banks (USA), J.P. Bardon (France), H.D. Bui (France), H. Busby (USA), G. Chavent (France), G. Demoment (France), G.S. Dulikravich (USA), G.M. Gladwell (Canada), E. Hensel (USA), D.B. Ingham (UK), S. Kubo (Japan), M. Lallemand (France), P. Lamm (USA), A, Maniatty (USA), N. McCormick (USA), J.R. McLaughlin (USA), G. Milano (Italy), D.A. Murio (USA), H.G. Natke (Germany), P. Pilvin (France), H.-J. Reinhardt (Germany), M. Reynier (France), W. Rundell (USA), E.P. Scott (USA), N. Zabaras (USA) Organizing Committee S. Benet (France), D. Delaunay (France), B. Garnier (France), Y. Jarny (France), D. Maillet (France), M. Raynaud (France), J.J. Sera (France), K. Woodbury (USA) Attendance at Conference Attendance will be limited and will be by invitation only. Persons wishing to attend the conference should submit an information/application form (attached) by February 1, 1995. Co-Sponsors The current list of co-sponsors include the French Ministry of Research (MESR), the French Ministry of Defense, the National Center of Scientific Research (CNRS), and the Eurotherm Committee. Engineering Foundation Conferences Engineering Foundation Conferences were established in 1962 to provide an opportunity for the exploration of problems and issues of concern to engineering from many disciplines. The format of the conference provides morning and evening sessions in which major presentations are made. Available time is including during the afternoons for ad hoc meetings and informal discussions and is designed to enhance rapport among participants and promote dialogue on the developments of the meeting. We believe the conferences have been instrumental in generating ideas and disseminating information to a greater extent than is possible through more conventional forums. All participants are expected to contribute actively to the discussions. Engineering Foundation Conferences Fellowship Program The Engineering Foundation has announced a Conferences Fellowship Program. Applicants are limited to those currently active in engineering or related professions with a direct interest in the conference topic. They must be within ten years of their B.S. degree at the time their application is submitted. The stipend is sufficient to cover the conference registration fee and on-site room and board. Transportation expenses are not included. Application information may be obtained by fax from EF or on WWW (www.engfnd.org/engfnd). Conference Location The conference will be held at the resort Port aux Rocs at Le Croisic, France. The city of Le Croisic lies on the West Atlantic Coast of France and is near the resort city of La Baule. It is a pretty and wild area with a very pleasant climate in late spring. On site conference participants can enjoy bicycling, miniature gold, billiards, archery, ping- pong, and walking along the coast. Available nearby are sailing, riding, tennis and climbing. Le Croisic is directly connected by TGV to Nantes and Paris. Conference Fees The conference fee is all inclusive. It includes registration, accommodations, meals, taxes and gratuities from dinner on Sunday through lunch on Friday. The fees are tentatively set at: Participant (single occupancy or sharing room with guest) $1195. Participant (sharing room with another participant) $1095. Bona fide graduate student (sharing room with participant)$ 805. Guest (sharing room with participant; all meals) $ 485. ATTENDANCE AT THIS CONFERENCE WILL BE LIMITED. IF YOU WISH AN INVITATION TO ATTEND THIS CONFERENCE, PLEASE RETURN THE ATTACHED INFORMATION FORM. SESSION CHAIRS AND INVITED SPEAKERS MAY USE THIS FORM TO PRE-REGISTER. For further information, please contact: Engineering Foundation 345 East 47th Street Room 303 New York, NY 10017 212-705-7837 - Fax: 212-705-7441 - E-mail: engfnd@aol.comWorld Wide Web:http://www.engfnd.org/engfnd INVERSE PROBLEMS IN ENGINEERING II CONFERENCE CATEGORY FOR WHICH ABSTRACT IS BEING SUBMITTED TITLE OF ABSTRACT Author(s) Institution/Company Address Phone, Fax and E-mail Please submit your abstract in this format. Authors are responsible for correct content and format. The abstract should contain approximately 100 - 250 words. In no circumstances may the abstract exceed one page. Please use a typeface which is easily read and leave a one inch margin on all sides. If there is more than one author, the person making the presentation should have his or her name underlined. Send your abstract to either: Mlle. I. Mace 2nd Intl Conference on Inverse Problems ISITEM La Chantreric Rue Christian Pauc C.P. 3023 44087 NANTES Cedex 03 (FRANCE) OR Engineering Foundation Inverse Problems Conference (96-AV) 345 East 47th Street Suite #303 New York, NY 10017 (USA) The deadline for receipt of abstracts is October 15, 1995. INFORMATION/PRE-REGISTRATION FORM Engineering Foundation Conferences 345 East 47th Street Suite 303 New York, NY 10017 212-705-7836; Fax: 212-705-7441; E-mail: engfnd@aol.com 2nd International Conference on INVERSE PROBLEMS IN ENGINEERING: THEORY AND PRACTICE 9-14 June 1996 Port aux Rocs Le Croisic, France E-mail: REQUEST FOR ADDITIONAL INFORMATION ___ Please send a copy of the program ___ I wish to submit a contributed paper - my abstract is enclosed ___ I wish to submit a contributed paper - my abstract has been sent to Mlle. I. Mace PRE-REGISTRATION ___ I am an invited speaker or session chair. ___ I am a member of the organizing committee. EF USE ONLY Date Rcvd: Fwd Chair: Approved: Wait List: ------------------------------ From: meetings@siam.org Subject: SIAM 1995 Annual Meeting Date: Thu, 7 Sep 1995 To further improve its service to SIAM members and the math community in general, SIAM is pleased to announce that the 1995 SIAM Annual Meeting preliminary program, with the hotel and registration information, is NOW available on the World Wide Web. Point your browser to the URL: http://www.siam.org/meetings/an95/an95home.htm You can also find the call for participation announcements for the 1996 SIAM conferences at these URLs: http://www.siam.org/meetings/co96/cfp/co96home.htm (Combustion) http://www.siam.org/meetings/ad96/cfp/ad96home.htm (Computational Differentiation) http://www.siam.org/meetings/dm96/cfp/dm96home.htm (Discrete Math) http://www.siam.org/meetings/op96/op96home.htm (Optimization) Any questions that you may have in relation to the aforementioned meeting and conferences, please contact: meetings@siam.org Any comments or suggestions that you may have concerning the formats of these announcements on the World Wide Web, please contact: melvin@siam.org We look forward to your participation and attendance at any of these meetings. SIAM Conference Department ------------------------------ From: "PROF.HEINZ W. ENGL" Subject: submission for digest Date: Fri, 15 Sep 1995 Open Postdoc Positions in Industrial Mathematics At the Chair for Industrial Mathematics at the Johannes Kepler Universitdt in Linz (Austria), a full-time research position is to be filled immediately (now for 18 months, renewable for up to 4 years). The position is financed by industry and involves research in inverse problems, especially in connection with parameter identification and inverse heat conduction problems that arise in steel industry. Good knowledge about the numerical solution of pdes is essential, knowledge about inverse problems is desirable. The gross annual salary will be (depending on prior experience and age) between 360.000 and 420.000 Austrian Schilling. Citizens of E.C. countries and of Switzerland and Norway do not need visa or work permit, others do. In a few months, a second position of the same type will probably be open. Applications should be sent to Prof.Heinz W. Engl, Chair for Industrial Mathematics, Johannes Kepler Universitdt, A-4040 Linz, Austria. E-Mail: engl@indmath.uni-linz.ac.at Information about the Chair for Industrial Mathematics can be obtained in the WWW at http://www.indmath.uni-linz.ac.at/ Prof.Dr.Heinz W. Engl E-Mail: engl@indmath.uni-linz.ac.at Industriemathematik or na.engl@na-net.ornl.gov Institut fuer Mathematik secretary: nikolaus@indmath.uni-linz.ac.at Johannes-Kepler-Universitaet Phone: +43-(0)732-2468; ext.9219 or 693, Altenbergerstrasse 69 secretary: 9220; home: +43-(0)732-245518 A-4040 Linz Fax: +43-(0)732-2468855 Oesterreich / Austria Telex: 2-2323 uni li a ------------------------------ From: (Dr. James Beck) Subject: Date: Tue, 26 Sep 95 PERSPECTIVE ON THE RELATION OF CURRENT ENGINEERING PRACTICE TO INVERSE PROBLEMS This contribution has two purposes. One is to stimulate conversation among engineers and others who perform experiments and estimate parameters. It gives a general framework which I see many engineers (and others) working. The second purpose is to give mathematicians and others an understanding of the common experimental-analytical paradigms for unknown processes and their relationship to the study of inverse problems. I would be happy to hear from anyone who would like to discuss these ideas further. Below are some thoughts on two current research paradigms in engineering. These paradigms are contrasted with what I consider to be a more powerful paradigm - which is actually part of the subject of inverse problems. This third type is familar to the inverse problems community but it is not widely known or practiced in engineering. Common Research Paradigms in Engineering Two types of paradigms in engineering research are commonly used. Type A involves investigating a "simple" phenomena and a single parameter is found using a simple algebraic equation. Type B has its objective to verify that the model is satisfactory to describe a certain phenomena. Common Paradigm of Type A In the type A paradigm, a process has an unknown such as thermal conductivity, heat transfer coefficient, diffusion coefficient, Young's modulus, or friction coefficient. Although the mathematical model for the phenomena may be complex, the final equation for finding the parameter of interest is usually quite simple, frequently as an algebraic equation. The other part of the type A procedure involves an experiment. The experiments is selected to produce measurements that are compatible with the model. From these measurements and the model, the parameter is determined. Common Paradigm of Type B In the type B of the common paradigm, an incompletely understood engineering process is investigated in two distinct and complementary ways: one uses experiments and the other uses analytical or computer modeling. The first part involves an analytical model. This can involve the solution of ordinary or partial differential equations. Any needed constants are found from the literature or completely separate experiments of Type A which are found by breaking the problem into several independent parts. After all the parts are found, they are assembled into one large model and a prediction is made for some experimental conditions. An experimental effort produces measurements for the same process. No interaction between the analysis and the experiment for the complete process is allowed. The experimental group in effect "throws over the wall" the data and description of the experiment to the analytical group. Then a figure of overall results is produced, comparing those from the model and the experiment. Characteristically, the comparison of the graphical results is visual and not quantitative. Instead the agreement is usually simply said to be "satisfactory" or even "excellent," showing that the model is also satisfactory. An important point is that the results of the experiment and analysis are purposely kept apart until the last possible moment, and then compared only on same plot. The intent is to avoid any "knobs" to turn to get agreement between the model and the measurements. Results of the model may be not used to modify and improve the experiment; similarly the model may not be modified based on the experiment. New Research Paradigm in Engineering - Involving Inverse Problems: Type C In the "new research paradigm," Type C paradigm, the emphasis is upon combined and interactive experiments and analysis. The concepts of experiment design and "stretching and straining" the model enters. Computers are used both in the experiments, modeling and estimating of parameters or determining better models. The paradigm is now described in more detail. The paradigm is directed toward understanding some physical engineering process that has some unknown aspects. A first objective is to identify what is unknown. This in turn leads to the design of an experiment that will provide measurements that can be used to determine what is unknown. Two aspects should be considered at this point. First, the errors (or uncertainty) of the measuring devices(s) should be understood and quantified. The second aspect is that the experiment should be optimally designed, as much as possible without precisely knowing all the parameters or possibly the correct model. A simulation should be performed to see if the experiment will reveal what is thought to be unknown. This then requires some interaction with the analysis/modeling group in the beginning of the investigation. The purpose is to reveal if the experiment has the potential to determine the unknowns. Then the experiment is performed. After that, the analysis is performed (possibly involving finite differences or elements). Instead of simply performing a direct calculation and comparing the results in a graphical fashion, the analysis now includes an inverse algorithm for estimating some parameters or functions. This estimation algorithm may be nonlinear and involve iteration. The residual principle may be used in which the estimated standard deviation between the measurements and the estimated values are made to be about equal to the expected measurement errors. The residuals are examined to determine any systematic trends or signatures. Confidence regions are constructed. After the experiment has been analyzed, it may be possible to improve the experiment using optimality concepts. Furthermore the residuals might give some insight for improving the model. An important point is that this Type C paradigm does not require breaking the problem into a number of parts (Type A experiments). In some cases it may still be very wise to do that. However, there are cases in which the individual parts are not independent. For example, some materials change (dry, burn, ablate, cure, etc.) during the process; in such cases the Type B paradigm is not adequate. In other cases, the desired result is a function of time, such as a time-dependent heating condition, which cannot be found by the Type B paradigm. I would appreciate any comments. James V. Beck, Professor (beck@egr.msu.edu) Department of Mechanical Engineering A231 Engineering Building Michigan State University East Lansing, MI 48824 Tel no. 517-355-8487, Fax: 517-353-1750 ------------------------------ From: spiegelman@siam.org Subject: SIMA 26-6 (11/95) TOC Date: Thu, 07 Sep 95 SIAM Journal on Mathematical Analysis Vol 26, No 6, November 1995 CONTENTS Stability for Systems of Conservation Laws in Several Space Dimensions C. M. Dafermos A Comparison of Two Viscous Regularizations of the Riemann Problem for Burgers's Equation M. Slemrod On Scalar Conservation Laws with Point Source and Discontinuous Flux Function Stefan Diehl On the Slow Motion of Vortices in the Ginzburg--Landau Heat Flow Jacob Rubinstein and Peter Sternberg A Uniqueness Result for a Generalized Radon Transform B. L. Fridman Monotonicity and Invertibility of Coefficient-to-Data Mappings for Parabolic Inverse Problems Paul DuChateau Analyticity of Solutions of the Generalized Korteweg--de Vries Equation with Respect to Their Initial Values Bing-Yu Zhang Convergence of Double Obstacle Problems to the Generalized Geometric Motion of Fronts Ricardo H. Nochetto and Claudio Verdi Instability and Blow-up of Solutions to a Generalized Boussinesq Equation Yue Liu Smoothing Properties, Decay, and Global Existence of Solutions to Nonlinear Coupled Systems of Thermoelastic Type Jaime E. Munoz Rivera and Reinhard Racke Perturbed Scale-Invariant Initial Value Problems in One-Dimensional Dynamic Elastoplasticity Michael K. Gordon Coupled Parabolic and Hyperbolic Equations Modeling Age-Dependent Epidemic Dynamics with Nonlinear Diffusion Chaocheng Huang and Jiongmin Yong Singular Perturbation Theory for Homoclinic Orbits in a Class of Near-Integrable Dissipative Systems Gregor Kovacic A Simple Proof of Fryant's Theorem M. K. Vemuri New Bounds for Hahn and Krawtchouk Polynomials Holger Dette ------------------------------ From: thomas@siam.org Subject: SICON 33-6 Date: Wed, 20 Sep 95 SIAM JOURNAL ON CONTROL AND OPTIMIZATION NOVEMBER 1995 Vol 33, No 6 CONTENTS Rendezvous Search on the Line with Indistinguishable Players Edward J. Anderson and Skander Essegaier Optimal Programs on Infinite Horizon 1 A. J. Zaslavski Optimal Programs on Infinite Horizon 2 A. J. Zaslavski COCOLOG: A Conditional Observer and Controller Logic for Finite Machines Peter E. Caines and Suning Wang Remarks on Nonlinear Stochastic Partial Differential Equations: An Application of the Splitting-up Method Noriaki Nagase Solution of Optimal Control Problems by a Pointwise Projected Newton Method C. T. Kelley and E. W. Sachs On the Adaptive Control of Jump Parameter Systems via Nonlinear Filtering Peter E. Caines and Ji-Feng Zhang Periodic Stability of Nonlinear Flexible Systems with Damping Koichiro Naito Identification for Parabolic Distributed Parameter Systems with Constraints on the Parameters and the State Wenhuan Yu A Convex Approach to the Mixed H_2/H_infinity Control Problem for Discrete-Time Uncertain Systems J. C. Geromel, P. L. D. Peres, and S. R. Souza Finite-Dimensional Risk-Sensitive Control Problem Alain Bensoussan and Robert J. Elliott On the Topology of the Karush-Kuhn-Tucker Set under Mangasarian-Fromovitz Constraint Qualification Harald Gunzel Pontryagin Maximum Principle for Semilinear and Quasilinear Parabolic Equations with Pointwise State Constraints Bei Hu and Jiongmin Yong Risk-Sensitive Control on an Infinite Time Horizon Wendeffman-Taylor Fingers Robert Almgren Numerical Integrations of Systems of Conservation Laws of Mixed Type Shi Jin Traveling Waves Solution of Convection-Diffusion Systems Whose Convection Terms Are Weakly Nonconservative: Application to the Modeling of Two-Phase Fluid Flows Lionel Sainsaulieu Stability Analysis for the Immersed Fiber Problem John M. Stockie and Brian T. R. Wetton Crack Propagation Models for Rock Fracture in a Geothermal Energy Reservoir Alistair D. Fitt, Amanda D. Kelly, and Colin P. Please Periodic Folding of Thin Sheets L. Mahadevan and Joseph B. Keller The Onset and End of the Gunn Effect in Extrinsic Semiconductors Luis L. Bonilla and Francisco J. Higuera Symmetric and Antisymmetric Pulses in Parallel Coupled Nerve Fibres Amitabha Bose Analysis of a Delayed Two-Stage Population Model with Space-Limited Recruitment Yang Kuang and Joseph W.-H. So Effects of Randomness of Risk Factors on the HIV Epidemic in Homosexual Populations Wai-Yuan Tan, Si Chin Tang, and Sho Rong Lee Eigenvalues of the Far Field Operator for the Helmholtz Equation in an Absorbing Medium David Colton and Rainer Kress An Inverse Problem for an Elastoplastic Medium Alemdar Hasanov The Geometrical Description of the Nonlinear Dynamics of a Multiple Pendulum V. Zharnitsky Dynamics in a Discrete Nagumo Equation: Spatial Topological Chaos Shui-Nee Chow and Wenxian Shen On a Discrete-Time Nonlinear System Associated with the Second-Order Digital Filter Zbigniew Galias ------------------------------ From: Richard Brualdi Subject: LAA, Contents Date: Mon, 11 Sep 1995 LINEAR ALGEBRA AND ITS APPLICATIONS Volume 229, November 1, 1995 CONTENTS Iterative Schemes for the Least 2-Norm Solution of Piecewise Linear Programs Krzysztof C. Kiwiel Bellman's Inequality Changqin Xu Multiplicity of Integer Roots of Polynomials of Graphs Isabel Faria Products of Involutory Matrices Over Rings F. A. Arlinghaus, L. N. Vaserstein, and Hong You Matrix Decompositions Using Displacement Rank and Classes of Commutative Matrix Algebras Carmine Di Fiore, Paolo Zellini Projection-Minimization Methods for Nonsymmetric Linear Systems Khalide Jbilou Sums and Products of Two Quadratic Matrices Jin-Hsien Wang Interpenetration of Ellipsoids and the Polynomial Bound of a Matrix John A. Holbrook Positive Definite Constrained Least-Squares Estimation of Matrices H. Hu Solving Linear Systems Involved in Constrained Optimization Yixun Shi ------------------------------ From: "Lieke v.d. Eersten-Schultze" Subject: MCSS Date: Thu, 28 Sep 1995 Contributed by Jan H. van Schuppen (J.H.van.Schuppen@cwi.nl) MCSS WELCOMES NEW ASSOCIATE EDITORS The Editorial Board of the journal Mathematics of Control, Signals, and Systems (MCSS) has been extended with four new Associate Editors: - J.-M. Coron (Ecole Normale Superieure de Cachan, Cachan, France) - M.R. James (Australian National University, Canberra, Australia) - V. Kharitonov (St. Petersburg University, St. Petersburg, Russia /temporarily at CINVESTAB-IPN, Mexico, D.F., Mexico) - A. Rantzer (Lund Institute of Technology, Lund, Sweden) The Editors are happy that these capable and outstanding researchers are willing to assist with the operation of the journal. Information on MCSS including tables of contents is available at its home pages: - http://www.cwi.nl/cwi/departments/BS3/mcss.html - http://www.math.rutgers.edu/~sontag/mcss.html Papers must be submitted to: J.H. van Schuppen (Co-Editor MCSS) CWI P.O. Box 94079 1090 GB Amsterdam The Netherlands Bradley Dickinson, Eduardo Sontag, Jan van Schuppen (Editors) ------- end -------