IPNet Digest Volume 8, Number 09 November 29, 2001 Today's Editor: Patricia K. Lamm Michigan State University Today's Topics: NSF-CBMS Conference on Inverse Problems International Conference on Ill-Posed and Inverse Problems Workshop on Electrical Impedance Tomography SIAM Conference on Discrete Mathematics Workshops at the Fields Institute Postdoc in Electrical Impedance Imaging, Inverse Conductivity Table of Contents: Inverse Problems Table of Contents: Linear Algebra and Its Applications Submissions for IPNet Digest: Mail to ipnet-digest@math.msu.edu Information about IPNet: http://www.mth.msu.edu/ipnet Mail to ipnet-request@math.msu.edu ----------------------------- From: "Andrey L. Karchevsky" Subject: International Conference: Ill-Posed and Inverse Problems Date: Thu, 1 Nov 2001 Dear colleagues, I glad to inform you about International Conference on ILL-POSED and INVERSE PROBLEMS in honour of the 70-th anniversary of the birth of Prof. M.M. Lavrent'ev August 5-9, 2002 Novosibirsk, Russia First Announcement The Organizing Committee is pleased to announce that the International Conference "ILL-POSED and INVERSE PROBLEMS" will take place in Novosibirsk,Russia, from Monday, August 5, through Friday, August 9, 2002. Sobolev Institute of Mathematics, Novosibirsk State University, and Krasnoyarsk State University convene the International Conference. Chairman - Prof. V.G. Romanov Vice-Chairman - Prof. S.I. Kabanikhin Vice-Chairman - Prof. M.V. Fokin Secretary - Dr. O.A. Klimenko, e-mail: klimenko@math.nsc.ru Conference Themes: Ill-posed problems, inverse problems, tomography and other imaging modalities. Numerical analysis and applications. International Program Committee V.G. Romanov (Chairman), Sobolev Institute of Mathematics, Novosibirsk, Russia Yu.E. Anikonov, Sobolev Institute of Mathematics, Novosibirsk, Russia M.I. Belishev, Steklov Mathematical Institute, St. Petersburg Division, St. Petersburg, Russia Yu.Ya. Belov, Krasnoyarsk State University, Krasnoyarsk, Russia A.L. Bukhgeim, Sobolev Institute of Mathematics, Novosibirsk, Russia G. Chavent, University of Paris X, Paris, France D. Colton, University of Delaware, Newark, USA A.M. Denisov, Moscow State University, Moscow, Russia H.W. Engl, Industrial Mathematics Institute, Johannes Kepler University, Linz, Austria A.M. Fedotov, Institute of Computational Technologies, Novosibirsk, Russia Y. Iso, Kyoto University, Kyoto, Japan S.I. Kabanikhin (Vice-Chairman), Sobolev Institute of Mathematics, Novosibirsk, Russia O.A. Klimenko (Secretary), Sobolev Institute of Mathematics, Novosibirsk, Russia R. Kress, Institute of Numerical and Applied Mathematics, Goettingen, Germany M.M. Lavrent'ev (jr.), Sobolev Institute of Mathematics, Novosibirsk, Russia A.Lorenzi, Milan University, Milan, Italy B.A. Mair, University of Florida, Gainesville, USA G.I. Marchuk, Institute of Computational Mathematics, Moscow, Russia Z. Nashed, University of Delaware, Newark, USA V.V. Pickalov, Institute of Theoretical and Applied Mechanics, Novosibirsk, Russia P. Sabatier, Montpelier University, France O. Scherzer, University of Bayreuth, Germany S.I. Smagin, Computing Center, Khabarovsk, Russia V.N. Strakhov, Institute of Physics of Earth's, Moscow, Russia Y.M. Sultangazin, Institute of Space Investigations, Almaty, Kazakhstan J. Sylvester, University of Washington, Seattle, USA G. Uhlmann, University of Washington, Seattle, USA V.V. Vasin, Institute of Mathematics and Mechanics, Ekaterinburg, Russia A.G. Yagola, Moscow State University, Moscow, Russia Sh. Yarmukhamedov, Samarkand State University, Samarkand, Uzbekistan [For an extensive list of members of the Local Program Committee and the Organizing Committee, please refer to the conference website: www.math.nsc.ru/conference/mml/ -Ed.] Mathematical Program The program of the Conference will include plenary invited lectures, 30 minutes lectures on sessions and poster session. Registration Please, fill in the following preregistration form and send it to Organizing Committee by e-mail: mml@math.nsc.ru You may register on the Web site: www.math.nsc.ru/conference/mml/forma.htm Preregistration form Surname (as in passport): First name (as in passport): Affiliation: Position: Preliminary title of the report: E-mail: Deadline of preregistration: Monday, December 31, 2001. Abstracts Abstracts will be reproduced and distributed in printed form to all participants of Conference at the beginning of the Conference. Abstracts should be submitted electronically to mml@math.nsc.ru Submission is also possible by fax or by ordinary mail to Dr. Olga Klimenko Sobolev Institute of Mathematics Academician Koptyug's Avenue, 4 Novosibirsk, 630090, Russia Fax: +7-3832-33-25-98 Abstracts are due by May 31, 2002. Please, print in English, using LaTex or AMS-Tex, 1 page in the following format: \documentclass[10pt,paper]{article} \usepackage[cp866]{inputenc}% for Russian \usepackage[russian]{babel}% for Russian \usepackage{amssymb,amsmath} \usepackage[mathscr]{eucal} \topmargin=3D10mm \oddsidemargin=3D25mm \textheight=3D160mm \textwidth=3D110mm \pagestyle{empty} \sloppy \begin{document} \begin{center} {\bf ON RECONSTRUCTION OF THE TRANSPARENT SURFACES FROM THEIR APPARENT CONTOURS}\\[3mm] {\bf V.\,P.\,Golubyatnikov}\\[2mm] {\it Novosibirsk, Sobolev Institute of Mathematics,\\ E-mail: glbtn@math.nsc.ru} \end{center} \medskip \noindent The problems of reconstruction of multidimensional objects from information on their plane projections are considered in various disciplines of pure and applied mathematics. Here we study the uniqueness questions in the problem of reconstruction of the shape of a smooth hypersurface from the shapes of its apparent contours. As it was shown by F.\,Pointet [2] if the apparent contours $C(M_1,\omega)$, $C(M_2,\omega)$ of smooth hypersurfaces $M_1$, $M_2 \subset \mathbb{R}^{n+1}$ coincide for a sufficiently large set $W$ of directions $\omega \in S^n$ then these hypersurfaces coincide themselves. Using this theorem and the methods of [1] we obtain the following results: \noindent {\bf Theorem 1.} {\sl Let $M_1$, $M_2 \subset \mathbb{R}^3$ be smooth closed compact surfaces such that for any $\omega \in S^2$ the apparent contours $C(M_1,\omega)$ , $C(M_2,\omega)$ are equivalent with respect to some orientation-preserving motion of the plane $P(\omega)$ and the convex hulls $conv (C(M_1,\omega))$, $conv (C(M_2,\omega))$ of these contours have no rotation symmetries, then \begin{equation} M_{1}=3DF(M_{2}) \label{e:1} \end{equation} where $F:\mathbb{R}^3\longrightarrow \mathbb{R}^3$ is either parallel translation or central symmetry.} \noindent {\bf Definition.} {\sl The figures are called SO-similar if they are superimposed by a composition of an orientation preserving motion and a homothety.} \noindent {\bf Theorem 2.} {\sl Let $M_1$, $M_2 \subset \mathbb{R}^3$ be smooth compact closed surfaces and for all $\omega \in S^2$ their apparent contours $C(M_1,\omega)$, $C(M_2,\omega)$ are SO-similar and their convex hulls $conv(C(M_1,\omega))$, $conv(C(M_2,\omega))$ have no rotation symmetries (the ratio of the similitude is not supposed to be constant, independent of the plane $P(\omega)$), then the formula (\ref{e:1})holds for some $F$ which is either parallel translation or homothety.} The work was supported by NATO grant OUTR.CLG 970357. \vspace{3mm} \noindent 1. Golubyatnikov~V.P., On unique recoverability of visible compacta from their projections. {\it Math. USSR Sbornik} (1992) {\bf 73}, No.\,5, 1--10. \noindent 2. Pointet~F., Separation of hypersurfaces. {\it J. Geom.} (1997) {\bf 59}, No.\,2, 114--124. \end{document} ************************* Conference Location and Travel Arrangements Conference takes place in Academgorodok (academic campus) near Novosibirsk the largest city of Siberia. Academgorodok is situated in the middle of Siberian forests in Golden Valley. It is about 40 km from Novosibirsk and international airport Tolmachevo. There are about 40 research institutes and Novosibirsk State University in Academgorodok. Participants will be accommodated in international hotel within walking distance from the Conference location (House of Scientists). Climate and Clothing The Conference takes place during summer where the temperature is around 25 C (77 F) during the day and 15 C (59 F) at night. It may be useful to bring a sweater, umbrella and swimming suit. Contact Information Dr. Olga Klimenko Sobolev Institute of Mathematics Academician Koptyug's Avenue, 4, Novosibirsk, 630090, Russia Phone: +7-3832-33-29-87 Fax: +7-3832-33-25-98 E-mail: klimenko@math.nsc.ru www.math.nsc.ru/conference/mml ----------------------------- From: Jennifer Mueller Subject: Workshop on Electrical Impedance Tomography Date: Mon, 19 Nov 2001 We are pleased to announce: The First Mummy Range Workshop on Electrical Impedance Tomography will be held Aug. 1-7, 2002 at the Pingree Park Conference Center of Colorado State University. The Pingree Park Campus is located in the Mummy Range of the Rocky Mountains 53 miles west of Fort Collins, Colorado, and just north of Rocky Mountain National Park. This rustic setting offers unique opportunities for hiking and enjoying nature while participating in the Workshop. The organizers of the Workshop are David Isaacson (RPI), Jennifer Mueller (Colorado State University), and Samuli Siltanen (Instrumentarium Corporation, Finland). Several themes of the Workshop include 1. Reconstruction algorithms 2. Issues of system design 3. Applications such as breast cancer detection, head imaging, and imaging of ventilation and perfusion 4. Conductive and dielectric properties of tissue and tumors 5. Planar and other electrode configurations We are soliciting abstracts for presentations. Please submit your half-page abstract to one of the organizers by March 1, 2002. Registration information will be forthcoming. Further information about the Workshop and Pingree Park may be obtained at the conference website: http://www.eitworkshop.org Submitted by: Jennifer Mueller Office: 970.491.7417 Department of Mathematics FAX: 970.491.2161 101 Weber Building Colorado State University mueller@math.colostate.edu Fort Collins, CO 80523-1874 www.math.colostate.edu/~mueller ----------------------------- From: ross@siam.org Subject: SIAM Conference on Discrete Mathematics Date: Mon, 12 Nov 2001 Conference Name: SIAM Conference on Discrete Mathematics Location: Handlery Hotel & Resort, San Diego, California Dates: August 11-14, 2002 The Call for Presentations for this conference is now available at: http://www.siam.org/meetings/dm02/ For additional information, contact SIAM Conference Department at siam@meetings.org ----------------------------- From: Ken Jackson Subject: Workshops at the Fields Institute Date: Fri, 9 Nov 2001 We are planning several events at the Fields Institute over the next several months that may interest readers of the IPNet Digest. These include: 1. Short Course and Lectures on Numerical Bifurcation and Center Manifold Analysis in Partial Differential Equations, Klaus Boehmer, November 19 - 28, 2001. 2. Workshop on Computational Biology, November 29 - December 2, 2001 3. Workshop on Computational Challenges in Dynamical Systems, December 3 - 7, 2001. 4. Short Course on PDE methods for path dependent options, Feb. 25 - 26, 2002. 5. Computational Methods and Applications in Finance Workshop, Feb. 27 - Mar. 1, 2002. 6. SIAM Conference on Optimization, May 19 - 22, 2002. Program-related event. 7. Validated Computing 2002, May 23 - 25, 2002. Program-related event. 8. Informal Working Group on Validated Methods for Optimization, May 26 - June 1, 2002 9. Symbolic Computational Algebra 2002, July 13 - 19, 2002. 10. Short Course on Numerical Solution of Advection-Diffusion-Reaction Equations, Jan Verwer, July 29 - August 2, 2002. 11. IMACS International Conference on Adaptive Methods for PDEs, August 6 - 9, 2002. 12. The 2002 Workshop on the Solution of Partial Differential Equations on the Sphere, August 12 - 15, 2002. For more information about these and other events at the Fields Institute, see our webpage http://www.fields.utoronto.ca./programs/scientific/01-02/numerical/ ----------------------------- From: Jennifer Mueller Subject: Postdoctoral Position -- Imaging and Inverse Conductivity Date: Mon, 5 Nov 2001 The Department of Mathematics at Colorado State University is seeking an outstanding candidate for an anticipated 3-year postdoctoral position beginning Fall of 2002 in Electrical Impedance Imaging and the inverse conductivity problem. The individual must hold a doctorate at the time of appointment. We will expect the successful candidate to teach one course per semester, and to conduct a research program in the above area under the direction of Prof. Jennifer Mueller. We are expecting to be able to provide 11 months of salary for this position, subject to available funds. Applicants should submit a cover letter, a complete curriculum vita, a summary of future research interests, evidence of effective teaching, and at least three letters of recommendation to: Postdoctoral Hiring Committee Department of Mathematics Colorado State University Fort Collins, CO 80523 Applications received by January 15, 2001 will receive full consideration, but screening will continue until the position is filled. ----------------------------- From: "Janet Thomas" Subject: Table of Contents: Inverse Problems Date: Tue, 20 Nov 2001 Inverse Problems December 2001 Volume 17, Issue 6 Table of Contents SPECIAL SECTION: TESTING INVERSION ALGORITHMS AGAINST EXPERIMENTAL DATA Guest Editors' introduction K Belkebir and M Saillard Inverse scattering with real data: detecting and imaging homogeneous dielectric objects L Crocco and T Isernia Shape inversion from TM and TE real data by controlled evolution of level sets C Ramananjaona, M Lambert and D Lesselier Linear and nonlinear iterative scalar inversion of multi-frequency multi-bistatic experimental electromagnetic scattering data R Marklein, K Balasubramanian, A Qing and K J Langenberg Inversion of experimental multi-frequency data using the contrast source inversion method R F Bloemenkamp, A Abubakar and P M van den Berg Inversion of experimental data using linearized and binary specialized nonlinear inversion schemes B Duch\^ene Multiple-frequency distorted-wave Born approach to 2D inverse profiling A G Tijhuis, K Belkebir, A C S Litman and B P de Hon Imaging from real scattered field data using a linear spectral estimation technique M Testorf and M Fiddy A Bayesian approach for solving inverse scattering from microwave laboratory-controlled data A Baussard, D Pr\'emel and O Venard Modified$^2$ gradient method and modified Born method for solving a two-dimensional inverse scattering problem K Belkebir and A G Tijhuis An image fusion approach to the numerical inversion of multifrequency electromagnetic scattering data L Fatone, P Maponi and F Zirilli PAPERS Identification of the thickness of a thin layer from boundary measurements C Amrouche, R Luce and S Perez Spectral asymptotics of the Dirichlet-to-Neumann map on multiply connected domains in $\mathbb {R}^d$ P D Hislop and C V Lutzer On the numerical solution of a three-dimensional inverse medium scattering problem T Hohage Identification of doping profiles in semiconductor devices M Burger, H W Engl, P A Markowich and P Pietra A comparison of the Colton--Kirsch inverse scattering methods with linearized tomographic inverse scattering M Brandfass, A D Lanterman and K F Warnick Inverse scattering for periodic structures: stability of polygonal interfaces J Elschner and G Schmidt The inverse generalized Regge problem V Pivovarchik and C van der Mee Preconditioned all-at-once methods for large, sparse parameter estimation problems E Haber and U M Ascher A new slant on the inverse problems of electromagnetic frequency sounding: `convexification' of a multiextremal objective function via the Carleman weight functions M V Klibanov and A Timonov Some problems for a system of nonlinear equations on a half-line Pham Loi Vu A nonlinear inverse problem inspired by three-dimensional diffuse tomography F A Gr\"unbaum On the uniqueness of the inverse elastic scattering problem for periodic structures A Charalambopoulos, D Gintides and K Kiriaki Estimation of non-stationary region boundaries in EIT---state estimation approach V Kolehmainen, A Voutilainen and J P Kaipio An alternating iterative algorithm for the reconstruction of internal cracks in a three-dimensional solid body W Weikl, H Andr\"a and E Schnack Comparison of formulations and solution methods for image restoration problems T K\"arkk\"ainen, K Majava and M M M\"akel\"a The direct and inverse scattering problems for partially coated obstacles F Cakoni, D Colton and P Monk CORRIGENDUM Shape reconstruction of buried obstacles by controlled evolution of a level set: from a min--max formulation to numerical experimentation C Ramananjaona, M Lambert, D Lesselier and J-P Zol\'esio Submitted by: Janet Thomas Electronic Journals Producer Institute of Physics Publishing Dirac House, Temple Back, Bristol BS1 6BE, UK Tel: +44 (0)117 930 1081 Fax: +44 (0)117 929 4318 E-mail: janet.thomas@iop.org WWW: http://www.iop.org ----------------------------- From: Hans Schneider Subject: LAA vol 339 contents Date: Thu, 8 Nov 2001 Linear Algebra and Its Applications Dec 2001 Volume 339, Issue 1-3 Table of Contents Special issue on Discrete Tomography A. Del Lungo, P. Gronchi, G.T. Herman X-rays characterizing some classes of discrete sets E. Barcucci, A. Del Lungo, M. Nivat, R. Pinzani http://www.elsevier.nl/PII/S0024379501004311 Comparison of algorithms for reconstructing hv-convex discrete sets E. Balogh, A. Kuba, C. Devenyi, A.D. Lungo http://www.elsevier.nl/PII/S002437950100430X Reconstruction of 4- and 8-connected convex discrete sets from row and column projections S. Brunetti, A. DelLungo, F. DelRistoro, A. Kuba, M. Nivat http://www.elsevier.nl/PII/S0024379501004359 On the computational complexity of reconstructing three-dimensional lattice sets from their two-dimensional X-rays S. Brunetti, A. Del Lungo, Y. Gerard http://www.elsevier.nl/PII/S0024379501004372 Speeding up stochastic reconstructions of binary images from limited projection directions E. Vardi, G.T. Herman, T. Yung Kong http://www.elsevier.nl/PII/S0024379501004554 A convergent composite mapping Fourier domain iterative algorithm for 3-D discrete tomography A.E. Yagle http://www.elsevier.nl/PII/S002437950100458X Binary steering in discrete tomography reconstruction with sequential and simultaneous iterative algorithms Y. Censor http://www.elsevier.nl/PII/S0024379501004700 Reconstruction of tomographic images using analog projections and the digital Radon transform I. Svalbe, D. van der Spek http://www.elsevier.nl/PII/S0024379501004876 An algorithm for discrete tomography L. Hajdu, R. Tijdeman http://www.elsevier.nl/PII/S0024379501004839 Reconstruction of discrete sets with absorption A. Kuba, M. Nivat http://www.elsevier.nl/PII/S0024379501004864 Detection of flaws in construction columns using 3D reconstruction and manipulation J. Santos, L.C. Longoria, J.C. Palacios http://www.elsevier.nl/PII/S0024379501004840 Two-view ''cylindrical decomposition'' of binary images V. Di Gesu, C. Valenti http://www.elsevier.nl/PII/S0024379501004852 Author index http://www.elsevier.nl/PII/S0024379501005201 Please note: The access restrictions on articles/abstracts vary. Many journals have free access to abstracts, but in general access to full text PDFs is restricted to subscribers. Visit the journal at http://www.elsevier.nl/locate/jnlnr/07738 Submitted by: Hans Schneider hans@math.wisc.edu. Department of Mathematics 608-262-1402 (Work) Van Vleck Hall 608-271-7252 (Home) 480 Lincoln Drive 608-263-8891 (Work FAX) University of Wisconsin-Madison 608-271-8477 (Home FAX) Madison WI 53706 USA http://www.math.wisc.edu/~hans (URL) ------- end -------