IPNet Digest Volume 1, Number 12 December 8, 1994 Today's Editor: Patricia K. Lamm Michigan State University Today's Topics: SPIE Ill-Posed Inverse Problems Symposium Workshop on Parameter Identification and Inverse Problems New METTI Group - Thermal Measurements and Inverse Techniques New book on Inverse Heat Transfer Problems Table of Contents: Inverse Problems in Engineering Table of Contents: Journal of Math. Systems, Estimation, Control Table of Contents: Math of Control, Signals, and Systems Table of Contents:SIAM Journal on Mathematical Analysis Submissions for IPNet Digest: Mail to ipnet-digest@math.msu.edu Information about IPNet: Mail to ipnet-request@math.msu.edu ------------------------------ From: crj@sci2.cs.utah.edu (Chris Johnson) Subject: Call for Papers - SPIE Ill-posed Inverse Problems Symposium Date: Wed, 9 Nov 1994 CALL FOR PAPERS Experimental and Numerical Methods for Solving Ill-Posed Inverse Problems: Medical and Nonmedical Applications Conference Chairs: Randall L. Barbour, SUNY/Brooklyn Mark J. Carvlin, Bristol-Myers Squibb Co. Michael A. Fiddy, Univ. of Massachusetts/Lowell Program Committee: David Isaacson, Rensselaer Polytechnic Institute Norman J. McCormick, Univ. of Washington Michael V. Klibanov, Univ. of North Carolina/Charlotte Christopher R. Johnson, Univ. of Utah Robert V. McGahan, Rome Lab Part of SPIE's 1995 International Symposium, July 9-14, 1995 San Diego Convention Center, San Diego, CA Imaging methods are increasingly being applied to a wide range of applications that include clinical medicine, geophysics, remote sensing, and materials testing. Sources can be magnetic, acoustic, electrical, or electromagnetic in origin. These may be located external to the medium or inside. Detection modes may or may not be time dependent and can range from backscatter only to full tomographic measurement schemes. A common feature complicating many of these methods is the uncertainty regarding the volume of medium probed by the penetrating or emitted energy. Frequently, this uncertainty is due to the effects of scattering. Accurate knowledge of the energy distribution requires information about the medium, which is the unknown being examined. As a result, useful methods frequently must consider approximate solutions that represent compromises between computational effort, physical accuracy of the modeling scheme, and quality and type of available data. Principal topics of interest will fall into three main areas: (1) mathematical aspects of inverse methods (e.g., dealing with ill-conditioning, limited noisy data, missing phase information, superresolution, etc.); (2) modeling methods for forward and inverse scattering phenomena (e.g., approximate solutions to integral equations of scattering, finite difference time domain, and projection tomographic techniques); and (3) interdisciplinary applications, including clinical medicine, optics, astronomy, remote sensing, etc. This conference will bring together leading experts from universities, medical centers, government laboratories, and industry to discuss the latest developments in the diverse and fast developing field. Topics will include, but are not limited to, the following areas: Imaging modalities: * (MRI, PET, SPECT, EIT, optical, microwave, EEG/magnetic source, and acoustic imaging methods) * quantitative methods for imaging strong scatterers * inverse scattering problems * oxygen deficient states * monitoring of organ function (hepatic, cerebral, cardiac, renal, skeletal muscle, breast) * metabolite levels * tumor detection * laboratory modeling studies * time-resolved, harmonic, and time-independent illumination schemes * novel detection methods * multi-wavelength analysis Methods for solving ill-posed problems: * explicit methods * iterative perturbation methods * derivation of homogeneous and inhomogeneous reference states * use of a priori information * projection methods * regularization techniques * parallel computational methods * application of neural net methods * layer stripping Efficient numerical methods: * finite difference time domain * Finite Element * Monte Carlo * Discrete Ordinate * multigrid methods * hybrid methods to model complex media. Abstract Due Date: December 19, 1994 Manuscript Due Date: June 12, 1995 Send one abstract via email in ascii format to: abstracts@spie.org Or mail four copies to: San Diego '95 SPIE, P.O. Box 10, Bellingham, WA 98227-0010 Your abstract should include the following: 1. Abstract Title 2. Author Listing 3. Correspondence for each author (mailing address, telephone, email) 4. Submit to: (conference title) 5. Presentation: Oral Presentation or Poster Presentation 6. Abstract Text: 250 words 7. Brief Biography (principal author only): 50-100 words ------------------------------ From: "J. Gottlieb" Subject: Call for Papers Date: Sun, 04 Dec 94 WORKSHOP ON PARAMETER IDENTIFICATION AND INVERSE PROBLEMS IN HYDROLOGY, GEOLOGY AND ECOLOGY April 10-12, 1995 Sport School Schoeneck, Karlsruhe Germany WORKSHOP OBJECTIVES The workshop is the second meeting of the Applied Mathematics in Geo- and Ecology working group. Parameter identification and inverse problems are characterized by their ill-posed nature. Instabilities have to be regularized and ambiguities have to be compensated by a priori information. Consequently additional information from the applied problems must be introduced into the mathematical model, its discretization and into the algorithm of data inversion. Therefore,the interdisciplinary character of inverse problems is obvious. Moreover the tools originate from various subjects such as system and control theory, partial differential equations, nonlinear functional analysis, numerical analysis, measurement and computer technology. The purpose of the workshop is bring together mathematicians and applied scientists working in hydrology, soil physics, geophysics, geology and ecology. The workshop will provide an opportunity for the presentation and discussion of recent developments in applied inverse theory, and it will be a forum where scientists from various disciplines can exchange ideas and experiences. The workshop will also include an offer to young scientists learning more about the methodology of inverse and ill- posed problems. The research workshop is to be held in an environment conducive to informal discussion and interaction among all participants. To have a coherent program the following areas will be emphasized: 1. Mathematical modelling and identification of coefficients in linear and nonlinear partial differential equations (parabolic equations, diffusion-convection equations, Navier-Stokes equation): Identifiability and uniqueness, stochastic approaches to inverse problems, regularization of nonlinear ill-posed problems, optimization strategies, multiscale parametrization, parallel computation and numerical algorithms. SPEAKERS (preliminary): G. Chavent (Paris), P. DuChateau (Fort Collins), M. Hanke (Karlsruhe), K. Kunisch (Berlin), K. Schittkowski (Bayreuth), U. Tautenhahn (Zittau), W. Zimmermann (Karlsruhe). 2. Case studies and applications of identification methods to nonlinearities and distributed systems in hydrology, soil physics, geophysical monitoring of flow and transport processes, geology, meteorology. SPEAKERS (preliminary): A. Binley (Lancaster), J. Carrera* (Barcelona), H. Daniels (Darmstadt), W. Kinzelbach (Heidelberg), D.B. McLaughlin (MIT). *Unconfirmed PROGRAMME and ORGANIZATION COMMITTEE: J. Gottlieb (Karlsruhe), M. Hanke (Karlsruhe), B. Hofmann (Chemnitz), U. Hornung (Munich), W. Kinzelbach (Heidelberg), P. Knabner (Erlangen), G. Teutsch (Tuebingen). WORKSHOP LANGUAGE: English CALL FOR PAPERS: Titles and abstracts of invited and contributed papers or complete papers should be received in Karlsruhe by January 10, 1995. If possible use LaTeX and e-mail for submission. Depending on demand, contributed papers will be allocated for short presentations or poster sessions. Contributed papers are preferred which are consistent with the aforementioned program topics and which are promising to be a good basis for an interdisciplinary discussion. PROCEEDINGS: It is planned to publish all (reviewed) contributions in an electronical book. For electronic registration forms and other enquiries regarding the meeting, including those on contributed papers, please contact: jgottlieb@ibm3090.rz.uni-karlsruhe.de Johannes Gottlieb Institute of Soil Mechanics and Rock Mechanics Karlsruhe University D- 76049 Karlsruhe phone: [49]-721-6083279 fax: [49]-721-696096 ------------------------------ From: Denis.Maillet@ensem.u-nancy.fr (Denis_MAILLET) Subject: Announcement: METTI Group Date: Thu, 24 Nov 1994 Announcement: Creation and Actions of the METTI Group METTI (Metrologie Thermique et Techniques Inverses - Thermal Measurements and Inverse Techniques) is a new group issued from the French heat transfer community. It was created in june 93 within GUT (Groupement Universitaire de Thermique), a French academic association in heat transfer. The founding of METTI has been initiated by the COST Thermique, a scientific committee of CNRS, the French national science foundation. It is now supported by the French Department of Research and Higher Education. METTI has been created in order to bring together scientists, from both industry and universities, that are interested in the development of methods of heat transfer measurement that are based on solution of inverse problems. The objectives of METTI concern the organization of any effective action that contributes to the development and the promotion of research, cooperation and education in this field. METTI will encourage rapprochements which could take place between heat transfer and other close fields that have the same interests for inverse problems associated with possible measurements. METTI is the French partner for international cooperation in this field. In 1994, METTI has organized two scientific one-day meetings: one on inverse problems in heat transfer with a total of ten communications (jan 12,1994) and another more specialized one on classification of inverse problems and on methodological aspects of solution of inverse problems based on thermal measurements (june 3, 1994). The proceedings of these two meetings (in French) can be ordered at the GUT secretariat in Nancy. One of the first actions of METTI has consisted in collecting a large number (41) of examples of works involving inverse techniques: these examples cover a broad field of applications in ten French laboratories. All these examples have been put together in a booklet (in French) edited by GUT in 1994. For each example, an abstract gives some brief informations about the inverse problem considered, the measurement principle, the inverse technique used and the main experimental results. This booklet is not an exhaustive presentation of the works that have been done in France in this field, but rather an outline of what can be done to illustrate the interest of inverse techniques in heat transfer measurements. The titles of these works are the following ones; 1 - Determination of liquid nitrogen boiling laws under atmospheric pressure (CETHIL) 2 - Determination of total emissivity of coatings on non-transparent surfaces (CETHIL) 3 - Determination of wall temperatures and fluxes between two dry rubbing solids (CETHIL) 4 - Determination of spectral radiative properties of scattering semi-transparent materials (CETHIL) 5 - Determination of a solidification or fusion front during a liquid/solid phase change (CETHIL) 6 - Identification of a wall heat flux in a 1D or 2D rectangular geometry (FAST) 7 - Identification of the wall heat flux and of the heat transfer coefficient in a quenching process (FAST) 8 - Identification of the evolution of a solid/liquid interface in a fusion process (FAST) 9 - Inverse problems in heat diffusion: I - Identification of boundary conditions (IUSTI) 10 - Inverse problems in heat diffusion: II - Identification of heat transfer coefficients (IUSTI) 11 -Inverse problems in heat diffusion: Identification of a behaviour model (IUSTI) 12 - Study of the development of convective nucleate boiling (LMP) 13 - Calibration of heat flux sensors (LMP) 14 - Measurement of thermophysical properties of low conductivity materials without any sensor inside the samples (ISITEM) 15 - Determinetion of reticulation kinetics of an epoxy resin (ISITEM) 16 - Identification of the heat flux in the mould during injection moalding of thermoplastics (ISITEM) 17 - Inverse conduction in 2D-domains:a code using the MODULEF finite element library (ISITEM) 18 - Measurement of the thermal conductivity of a polymer with thermal contact resistances through a transient inverse method (ISITEM) 19 - Non-destructive testing of laminated composites through infrared thermography (LEMTA) 20 - Measurement of thermal diffusivity of anisotropic materials by the heat pulse technique (LEMTA) 21 - A simple apparatus for thermal diffusivity measurement of thin samples (LEMTA) 22 - Measurement of thermophysical properties of solids by a quasi-steady state method ("hot wire" and "hot plane") (LEMTA) 23 - Identification of thermal contact resistances in cylindrical geometry by the heat pulse method (LEMTA) 24 - Measurement of the instantaneous heat transfer coefficient by a transient inverse method (LEMTA) 25 - Measurement of the local heat transfer coefficient on a thin wall by an inverse transient method (LEMTA) 26 - Reconstruction of absorption profiles in an axisymmetrical semi-transparent medium (LET) 27 - Reconstruction of temperature profiles in flames (LET) 28 - Identification of the absorption spectrum of a semi-transparent medium through non-isothermal emission spectrometry (LET) 29 - One-dimensional temperature profiles through inversion of spectral thermal emission (LET) 30 - Temperature profiles of jets through inversion of the deflection field of rays measured through a speckle technique (LET) 31 - Parametric identification in steady and transient regimes (Kalman filter) (LET) 32 - Heat flux measurement in a combustion chamber by inverse heat conduction through Kalman's algorithm (LET) 33 - Inversion for defect measurement : I - 1D exact method (local diagnostis) (L3C) 34 - Inversion for defect measurement : II - 2D method (local diagnosis) (L3C) 35 - Inversion for defect measurement : III - 1D approximate method (rapid evaluation) (L3C) 36 - Determination of temperature fields through holographic interferometry in gaseous media (LPA) 37 - Estimation of average wall temperature and heat flux at the interface between a disk and a brake pad (LMP) 38 - Identification of thermophysical characteristics of protection materials of metal structures (LMP) 39 - Determination of wall temperatures and fluxes in high speed friction (ETCA/CREA) 40 - Determination of absorbed fluxes by ceramic coatings under intense illumination (ETCA/CRE) 41 - Determination of thermal conduction properties of ceramic coatings (ETCA/CRE) Legend: CETHIL =Centre de Thermique de l'INSA - Lyon FAST = Fluides, Automatique et Systemes Thermiques - Orsay IUSTI = Institut Universitaire des Systemes Thermiques Industriels - Marseille LMP = Laboratoire de Mecanique Physique - Saint-Cyr l'Ecole ISITEM = Laboratoire de Thermocinetique - ISITEM - Nantes LEMTA = Laboratoire de Mecanique Theorique et Appliquee - Vandoeuvre-les-Nancy LET = Laboratoire d'Etudes Thermiques - Poitiers L3C = Laboratoire Capteurs, Caracterisation et CND - ONERA - Chatillon LPA= Laboratoire de Physique Appliquee - Perpignan ETCA/CREA = Centre de Recherche et d'Essais d'Arcueil In 1995 (March 19-25, 1995 in Aussois in the Alps), METTI organizes a one-week spring school entitled "Thermal Measurements and Inverse Techniques: Efficient methods associated with a metrology of high quality" for the formation of engineers and research workers in this field. For any further information contact: - - Didier Delaunay, METTI coordinator : delauna @isitem.univ-nantes.fr - - Denis Maillet, METTI secretary: dmaillet@ensem.u-nancy.fr - - Martin Raynaud, METTI Spring School: raynaud@cethil.insa-lyon.fr - - Edith Lang, GUT Secretariat for ordering the proceedings of the proceedings of the two 94 meetings or the METTI booklet (all in French): elang@ensem.u-nancy.fr ------------------------------ From: (Dr. James Beck) Subject: RE:Inverse Heat Transfer Problems, O.M. Alifanov Date: Wed, 16 Nov 94 A new book on inverse problems has been published in English by Springer-Verlag. It is "Inverse Heat Transfer Problems" by O.M. Alifanov. It has a 1994 copyright but is a translation of a 1979 Russian book. Dean Alifanov is a well-known international figure in this area and is the leading figure in the Former Soviet Union in the application of iterative regularization to a variety of heat transfer problems. ------------------------------ From: (Dr. James Beck) Subject: Table of Contents: Inverse Problems in Engineering Date: Tue, 15 Nov 94 INVERSE PROBLEMS IN ENGINEERING Co-Editors-in-Chief GEORGE S. DULIKRAVICH, The Pennsylvania State University, USA GRAHAM M. L. GLADWELL, The University of Waterloo, Ontario, Canada CONTENTS Welcoming Addresses to Inverse Problem in Engineering Optimum Design of Minimum Drag Bodies in Incompressible Laminar Flow Using a Control Theory Approach Jianchun Huan and Vijay Modi The One-dimensional Inverse Doping Problem in Semiconductor Device Modeling D. A. Gore and D. A. Drew Determining the Unknown Cooling Condition and Contact Heat Transfer Coefficient During Solidification of Alloys Y. Ruan, J. C. Liu and O. Richmond Design Sensitivity Analysis: Overview and Review D. A. Tortorelli and P. Michaleris ------------------------------ From: Elizabeth Hyman Subject: JMSEC Table of contents Date: Tue, 15 Nov 1994 J. OF MATHEMATICAL SYSTEMS, ESTIMATION, AND CONTROL Volume 4, Number 4 CONTENTS Chain-Scattering Representation, J-Lossless Factorization and H(infinity) Control Hidenori Kimura Higher Order Approximate Feedback Linearization about a Manifold Zhigang Xu and John Hauser Approximation and Regularity Results on Constrained Viscosity Solutions of Hamilton-Jacobi-Bellman Equations Paola Loretti and Maria Elisabetta Tessitore Summary: Necessary and Sufficient Condistions for Nonlinear Worst Case (H-infinity) Control and Estimation A.J. Krener Summary: A Parametrization of the Minimal Square Spectral Factors of a Nonrational Spectral Density Augusto Ferrante Summary: Well-Posedness, Stabilizability, and Admissibility for Pritchard-Salamon Systems Ruth F. Curtain, Hartmut Logemann, Stuart Townley, and Hans Zwart Summary: Continuous-time Gauss-Markov Processes with Fixed Reciprocal Dynamics Alessandro Beghi Summary: Modeling and Control of a Multiple Component Structure Belinda B. King - Contributed by: Edwin F. Beschler ------------------------------ From: sontag@control.rutgers.edu (Eduardo Sontag) Subject: Table of Contents: Math of Control, Signals and Systems Date: Thu, 1 Dec 94 MATH OF CONTROL, SIGNALS, AND SYSTEMS Volume 7, Number 1 CONTENTS Feedback stabilization of a hybrid PDE-ODE system: Application to an overhead crane B. d'Andrea Novel, F. Boustany, F. Conrad, B.P. Rao Regular linear systems with feedback George Weiss Nilpotent bases for a class of non-integrable distributions with applications to trajectory generation for nonholonomic systems Richard M. Murray Approximation algorithm for the infinite-dimensional Lyapunov equation Takao Nambu ------------------------------ From: young@siam.org Subject: SIAM J. Math. Anal., Vol. 26, No. 2, March 1995, Contents Date: Fri, 02 Dec 94 SIAM JOURNAL ON MATHEMATICAL ANALYSIS March 1995 Volume 26, Number 2 CONTENTS Inverse Problems at the Boundary for an Elastic Medium Gen Nakamura and Gunther Uhlmann Local Invertibility of Sobolev Functions I. Fonseca and W. Gangbo Mathematical Aspects of the Combustion of a Solid by a Distributed Isothermal Gas Reaction Jesus Ildefonso Diaz and Ivar Stakgold Positive Solutions of Singular Sublinear Dirichlet Boundary Value Problems Yong Zhang Parameter Dependence of Propagation Speed of Travelling Waves for Competition-Diffusion Equations Yukio Kan-on The Child-Langmuir Law for the Boltzmann Equation of Semiconductors Naoufel Ben Abdallah and Pierre Degond Global Existence of Solutions to Reaction-Hyperbolic Systems in One Space Dimension Danielle D. Carr Global Attractors for Parabolic Problems in Fractional Power Spaces Alexandre Nolasco de Carvalho and Jose Gaspar Ruas-Filho On Stability of a Dynamical System Charles S. C. Lin, Bin Yang, and Fudong Chen Multiexistence of Slowly Oscillating Periodic Solutions for Differential Delay Equations Yulin Cao On Recurrence Relations for Sobolev Orthogonal Polynomials W. D. Evans, Lance L. Littlejohn, Francisco Marcellan, Clemens Markett, and Andre Ronveaux On Two-Dimensional Definite Orthogonal Systems and a Lower Bound for the Number of Nodes of Associated Cubature Formulae H. Berens, H. J. Schmid, and Y. Xu Convex Approximation by Rational Functions Bo Gao, Donald J. Newman, and V. V. Popov Spline Wavelets of Small Support Debao Chen ------- end -------