krj@utcsri.UUCP (11/01/87)
NA Digest Saturday, October 31, 1987 Volume 87 : Issue 76 This weeks Editor: Cleve Moler Today's Topics: Generating Normal Deviates With A DSP Chip Postdoctoral Positions at Courant Faculty Positions at WPI A Workshop Announcement Evaluation of Hypergeometric Functions Positions at University of Florida Special Issue of LAA on Image Reconstruction Positions at Cray Research 20th "Interface" Symposium Golub Receives Guggenheim Fellowship ---------------------------------------------------------------------- Date: Wed, 28 Oct 87 16:07 EDT From: Jack Sharer <JWS%PSUARLC.BITNET@forsythe.stanford.edu> Subject: Generating Normal Deviates With A DSP Chip To: na@score.stanford.edu This is a request for help in designing a fast algorithm to generate normal deviates with a 16-bit DSP chip. It appears that a feedback shift register algorithm (1) will work well for generating the uniform deviates because of its long cycle length on small word architectures. My difficulty is identifying an algorithm to map the uniform deviates to normal deviates. The algorithms I know of are either time consuming (like add ten or so uniform deviates) or use logarithms (polar method and inverse error function). Do you have any suggestions? Thanks in advance, Jack Sharer, JWS@PSUARLC (1) Lewis&Payne. "Generalized Feedback Shift Register Pseudorandom Number Algorithm," JACM 20(3), pp 456-568, July 1973. ------------------------------ Date: Wed, 28 Oct 87 18:18:58 EST From: Brent Lindquist <lindquis@cmcl2.NYU.EDU> Subject: Postdoctoral Positions at Courant To: na.dis@score.stanford.edu POSTDOCTORAL POSITIONS AVAILABLE One or more postdoctoral positions may be available for work in computational fluid dynamics and hyperbolic conser- vation laws. Diverse applications including oil reservoir modeling, gas dynamics and fluid instabilities are being studied using front tracking, grid refinement and related methods. To apply for these positions, please send a vita, resume and a statement of scientific interests to James Glimm at Courant Institute, New York University, 251 Mercer Street, New York, NY 10012. Applicants should also list three references, who have been requested to send letters of recommendation to the above address. ------------------------------ From: Samuel Rankin <RANKIN@AFSC-HQ.ARPA> Date: Thu 29 Oct 87 15:01:26-EST Subject: Faculty Positions at WPI To: na@SU-SCORE.ARPA The Department of Mathematical Sciences will have several tenure track openings at all levels beginning in August, 1988. Visiting appointments are also available. The following areas of applied mathematics are of interest: scientific computing numerical analysis applied discrete mathematics pde mathematical fluid mechanics optimization control theroy probability-statistics Quality teaching and an active research program are expected. Inquires should be sent to, Samuel M. Rankin, III Dept. of Mathematical Sciences Worcester Polytechnic Institute 100 Institute Road Worcester, MA 01609 E-MAIL: smrankin@wpi.bitnet ------------------------------ Date: 29 Oct 87 18:24 EST From: Malvin Kalos <KALOS@NYU-CMCL1.ARPA> To: <NA@SCORE.STANFORD.EDU> Subject: A Workshop Announcement Workshop on Numerical Quantum Simulations (emphasis on Monte Carlo methods and on calculations in physical time) sponsored by Courant Institute of Mathematical Sciences New York University and Department of Mathematics Rutgers University Saturday, December 19, 1987 10AM to 3PM Courant Insitute of Mathematical Sciences New York University 251 Mercer Street New York N.Y. 10012 Talks by D. Ceperley (Illinois) and J. Hirsch (UC San Diego) as well as by the Courant and Rutgers groups are planned. Note: this is the second semi-annual workshop on this subject The first was held last spring and included talks by B. Berne (Columbia), D. Chandler (Berkeley), W. H. Miller (Berkeley), R. Stratt (Brown), and J. Doll (LANL). Others who wish to speak, or who wish additional information, should call or write to M. H. Kalos, CIMS (212) 998 3342 kalos@nyu.edu kalos@nyu.arpa kalos@nyuacf.bitnet or J. L. Lebowitz Department of Mathematics Hill Center - Busch Campus Rutgers University New Brunswick, New Jersey 08903 ------------------------------ Date: 29 Oct 87 18:13:09 GMT From: Sid Dalal <sid@bellcore.bellcore.com> Subject: Evaluation of Hypergeometric Functions To: na@score.stanford.edu I am interested in knowing about programs for evaluating the function F(l,m;n;z) (see p555, Abramowitz & Stegun, note this is not the same as confluent hypergeometric function defined on p.505) for integers l, m,n and z in [0,1]. Specifically I am interested in situation where n=m+1. Thank you. Please respond by mail as I don't often read netnews. Thanks. Sid R. Dalal bellcore!sid sid@wind.bellcore.com ------------------------------ Date: Thu, 29 Oct 87 13:41:09 EST From: Kermit Sigmon <sigmon%beach.cis.ufl.edu@RELAY.CS.NET> Subject: Positions at University of Florida To: na@SCORE.STANFORD.EDU POSITIONS AVAILABLE IN NUMERICAL ANALYSIS University of Florida Department of Mathematics The Department of Mathematics is in its second year of a five year program to fill over 20 new tenure track faculty positions with mathematicians of exceptional caliber. At least one third of these positions will be senior positions. The Department invites applications for six tenure track positions beginning Fall l988, two of which will be filled with senior appointments. Senior candidates chosen by the department will be given a role in the selection of this year's candidates for junior positions. The Department is especially interested this year in attracting candidates in the fields of: Numerical Analysis Combinatoricss Mathematical Physics Algebra Candidates should have strong research potential and a documented interest in teaching. Preference will be given to applicants with at least two years of postdoctoral experience. Rank and salary will be commensurate with experience and achievements. Candidates should forward a resume (including a list of publications) and should arrange for at least three letters of reference to be sent to: Gerard G. Emch, Chairman Department of Mathematics University of Florida Gainesville, FL 32611 All applications for the academic year 1988-89 must be complete by December 31, l987. The University of Florida is an equal opportunity employer. If further information is desired, candidates in numerical analysis may contact: Kermit Sigmon 904-392-0287 na.sigmon@su-score ------------------------------ Date: Fri, 30 Oct 87 11:55:55 cst From: Hans Schneider <hs@vanvleck.math.wisc.edu> To: na@score.stanford.edu Subject: Special Issue of LAA on Image Reconstruction LINEAR ALGEBRA AND ITS APPLICATIONS Special Issue in LINEAR ALGEBRA IN IMAGE RECONSTRUCTION FROM PROJECTIONS Contributions are invited for a special issue of Linear Algebra and Its Applications which will be devoted to Image Reconstruction From Projections. Original research articles that make a significant contribution to the field of image reconstruction from projections through the use of matrix theory and finite dimensional linear algebra are welcome. In this context, finite dimensional optimization theory and techniques are not ruled out. Any discipline for which image reconstruction is used will be considered, e.g., medicine, material testing, astronomy, optics, geophysics, atmospheric research. There is no restriction as to the modalities or underlying physical models, in medical imaging, for example, CT, PET, MRI, Ultrasound are included. Usually discretization (full or partial) of the model at an early stage of the analysis leads to finite dimensional linear algebra; authors are encouraged to include a concise introductory section describing the particular image reconstruction problem(s) they address and the modeling process. Papers may include mathematical results within the scope of LINEAR ALGEBRA AND ITS APPLICATIONS (published in every issue of the journal) which are motivated by, contributing to, or applicable to problems and methods of image reconstruction. Papers demonstrating through computational experimental work the use of established linear algebra based methods in image reconstruction are also very welcome. The issue is open to all and papers will be refereed in the usual way. The deadline for submission is 30 November 1988, with expected publication in the Fall of 1989. Authors should submit five copies of the manuscript (prepared according to the guidelines described in "Information for Authors" published in every issue of LAA) to one of the following special editors: Yair Censor Department of Mathematics and Computer Science University of Haifa Mt. Carmel, Haifa 31999, Israel. e-mail: rsma403@haifauvm.bitnet Tommy Elfving Department of Mathematics Linkoping University S-58183, Linkoping, Sweden. e-mail: t-elfving%linnea.liu.se@uunet.uu.net Gabor T. Herman Medical Imaging Section Department of Radiology Hospital of the University of Pennsylvania 3400 Spruce Street Philadelphia, Pennsylvania 19104, U.S.A. e-mail: herman@cis.upenn.edu ------------------------------ Date: Fri, 30 Oct 87 17:15:43 CST From: Phuong Vu <phuong@rice.edu> To: na@score.stanford.edu Subject: Positions at Cray Research The Mathematical Software Group at Cray Research, Inc. located in Mendota Heights, Minnesota have immediate openings for several numerical analysts to conduct research/development of algorithms and software for large scale scientific computations. Candidates should have a Ph.D. in computer science or mathematics, some experience in computations on vector/parallel computers in one of the following areas (sparse matrix methods, numerical linear algebra, numerical PDE, numerical optimization) and a strong interest in software development. The group is highly visible and the growth potential is tremendeous. Cray Research offers a competitive salary and benefits package along with an excellent working environment. Qualified candidates should forward resume, letters of recommendation and academic transcripts to Phuong Vu Cray Research, Inc. 2000 Bering Drive, Suite 830 Houston, Texas 77057 Requests for further information can be done using either of the following E-addresses: phuong@rice.edu or na@phuong@score.stanford.edu. ------------------------------ Date: Sat, 31 Oct 87 15:51 EST From: Edward Wegman <EWEGMAN%GMUVAX.BITNET@forsythe.stanford.edu> Subject: 20th "Interface" Symposium To: na@score.stanford.edu ANNOUNCEMENT AND CALL FOR PAPERS FOR THE SYMPOSIUM ON THE INTERFACE: COMPUTING SCIENCE AND STATISTICS (The 20th Meeting) Theme: Computationally Intensive Methods in Statistics April 21-23, 1988 Reston, VA (Suburban Washington, DC) Sponsors: The Interface Foundation of North America, Inc. George Mason University The National Bureau of Standards Cooperating Societies: American Statistical Society Institute of Mathematical Statistics Washington Statistical Society International Association for Statistical Computing Society of Industrial and Applied Mathematics American Mathematical Society Operations Research Society of America National Computer Graphics Association GENERAL INFORMATION The Twentieth Symposium on the Interface of Computing Science and Statistics will be held at the Sheraton International Conference Center in Reston, Virginia on April 21-23, 1988. The Symposium is a long-standing interdisciplinary forum focusing on the interface between statistics and computing. The focus of the 20th Symposium will be computationally intensive methods in statistics. Professor Brad Efron of Stanford University will give the keynote address on this theme and sessions are organized with this theme in mind. Planned invited sessions on computationally intensive methods include: Computational Aspects of Time Series Design of Computer Experiments Image Processing and Spatial Processes Computation and Stochastic Modeling Computation for Simulated Annealing Inference and Expert Systems Simulation Bayesian Computation Density Estimation and Smoothing Dynamical High Interaction Graphics Design of Experiments for Productivity Enhancement Entropy Methods In addition, planned invited sessions which support computationally intensive methods include: Computational Geometry Parallel Architectures Visualizing High Dimensional Spaces Object Oriented Programming Computational Discrete Mathematics Communication Networks Symbolic Computing Numerical Methods Neural Networks CONTRIBUTING PAPERS Sessions will include invited talks, contributed talks and exhibits. An opening night reception is planned as well as a banquet. An extensive exhibit area is also planned. Contributed presentations will be selected by the program committee and will last for 20 minutes. Authors who wish to contribute a paper should submit a written abstract no later than January 15, 1988. The abstract should be no longer than one page. Abstract of both contributed and invited papers will be available at the Symposium. The abstract and inquiries should be sent to: Professor Edward J. Wegman Interface Symposium P.O. Box 7460 Fairfax Station, VA 22039-7460 (703) 323-2723 Bitnet: EWEGMAN@GMUVAX Conference Proceedings will be published by the American Statistical Association after the Symposium. Camera-ready copy of the contributed and invited papers will be due on June 1, 1988. The Proceedings will include both invited and contributed papers. HOUSING The Symposium will be held at the Sheraton International Conference Center in Reston, VA (suburban Washington, DC) on the 21st through the 23rd of April, 1988. April is an extremely attractive time in Washington coinciding with the blooming of the famous cherry blossoms. Free shuttle service is provided by the Sheraton to and from nearby Dulles Airport. A commercial airport bus service is available from Washington National Airport. Hotel rates are quite reasonable for the peak of the tourist season ($79 for a single on Wednesday and Thursday and $45 for a single on Friday and Saturday). A block of rooms has been reserved and attendees are expected to make their own reservations. Because this is a peak tourist season, early reservations are strongly encouraged. Reservations can be made by calling (800) 325-3535 or (703) 620-9000. Make sure to identify yourself as being associated with the Interface Symposium. Registration and welcoming reception will take place on Wednesday, April 22, 1988. PROGRAM COMMITTEE Edward J. Wegman, Program Chairman George Mason University Emanuel Parzen, Texas A & M University Werner Stuetzle, University of Washington Jerome Sacks, University of Illinois Donald McClure, Brown University Richard Ringeisen, Clemson University Martin Fischer, Defense Communications Agency Nozer Singpurwalla, George Washington University Donald T. Gantz, George Mason University Prem Goel, Ohio State University David Scott, Rice University Paul Tukey, Bell Communications Research Mervin Muller, Ohio State University Raoul LePage, Michigan State University Sallie McNulty, Kansas State University Muhammed Habib, University of North Carolina John Miller, George Mason University INTERFACE FOUNDATION The Interface Symposium has for 20 years been operated by an informal, loosely organized group. While this has worked well in the past, as the scale of computing in statistics and the scale of the Symposium has grown, it has been increasingly difficult to operate on this informal basis. In August of 1987, the Interface Foundation of North America, Inc. (IFNA) was founded. IFNA is a non-profit, educational foundation whose aim is to promote the Interface Symposium and all related activities at the interface of comptuing science and statistics. The 20th Symposium will be the first formal activity of the new foundation. Additional Symposia are scheduled for Orlando, Florida in 1989 and for East Lansing, Michigan in 1990. ADDITIONAL SPONSORSHIP The IFNA has applied for support from the AFOSR, the ARO, the ONR, the NSF and the NSA> Contingent upon support from these organizations, a fund for graduate students and young investigators will be established to support travel and per diem. Please send in the attached form for further information. REGISTRATION The regular registration fee for members of cooperating societies is $105 and for non-members is $130. A preregistration discount is being offered to those who register early. For registrations received before January 15, 1988 the registration fee will be $95 for members of cooperating societies and $120 for non-members. The registration fee will include a copy of the Proceedings and the opening night reception. For further information, to be put on the IFNA mailing list and/or to register, please return the form below. SYMPOSIUM ON THE INTERFACE OF COMPUTING SCIENCE AND STATISTICS April 21 - 23, 1988 Sheraton International Conference Center Reston, Virginia Name: Affiliation: Address: Telephone: Electronic Mail Address: Registration Fee Enclosed /_/ $105 Members /_/ $130 Non-members Early Registration /_/ $ 95 Members /_/ $120 Non-members (Before January 15, 1988) /_/ Please send additional information when it becomes available /_/ I am interested in presenting a contribute paper with the title /_/ I cannot come but am interested in purchasing the Proceedings /_/ I would be interested in a reduced subscription rate to CHANCE, the new Springer-Verlag statistics magazine /_/ I would be interested in joining a new professional society oriented to the interface of statistics and computing. (If there is sufficient interest, the Board of Directors of the Interface Foundation will consider establishing such a society. ------------------------------ Date: Sat 31 Oct 87 16:52:23-PST Subject: Golub Receives Guggenheim Fellowship To: na@Score.Stanford.EDU From: Cleve Moler <na.moler@score.stanford.edu> Gene is too modest to mention this himself, but he has just been awarded a Guggenheim Fellowship. About one out of ten who apply for the fellowship are successful. It will cover his summer salary next year. He plans to continue his research on sparse linear systems. A list of all receipients in the mathematical sciences is included in a recent issue of SIAM News. Congratulations, Gene! --Cleve ------------------------------ End of NA Digest ************************** -------