34,293 research outputs found
A Conversation with Martin Bradbury Wilk
Martin Bradbury Wilk was born on December 18, 1922, in Montr\'{e}al,
Qu\'{e}bec, Canada. He completed a B.Eng. degree in Chemical Engineering in
1945 at McGill University and worked as a Research Engineer on the Atomic
Energy Project for the National Research Council of Canada from 1945 to 1950.
He then went to Iowa State College, where he completed a M.Sc. and a Ph.D.
degree in Statistics in 1953 and 1955, respectively. After a one-year post-doc
with John Tukey, he became Assistant Director of the Statistical Techniques
Research Group at Princeton University in 1956--1957, and then served as
Professor and Director of Research in Statistics at Rutgers University from
1959 to 1963. In parallel, he also had a 14-year career at Bell Laboratories,
Murray Hill, New Jersey. From 1956 to 1969, he was in turn Member of Technical
Staff, Head of the Statistical Models and Methods Research Department, and
Statistical Director in Management Sciences Research. He wrote a number of
influential papers in statistical methodology during that period, notably
testing procedures for normality (the Shapiro--Wilk statistic) and probability
plotting techniques for multivariate data. In 1970, Martin moved into higher
management levels of the American Telephone and Telegraph (AT&T) Company. He
occupied various positions culminating as Assistant Vice-President and Director
of Corporate Planning. In 1980, he returned to Canada and became the first
professional statistician to serve as Chief Statistician. His accomplishments
at Statistics Canada were numerous and contributed to a resurgence of the
institution's international standing. He played a crucial role in the
reinstatement of the Cabinet-cancelled 1986 Census.Comment: Published in at http://dx.doi.org/10.1214/08-STS272 the Statistical
Science (http://www.imstat.org/sts/) by the Institute of Mathematical
Statistics (http://www.imstat.org
Firm Incentives for Invention Prizes with Multiple Winners
This paper considers several multiple winner models where firms compete for invention prizes determined by the social planner. The short-run model, with a fixed number of firms, can result in negative expected societal benefit where welfare gains are totally dissipated. In the long-run model, with entry and exit, it is demonstrated that there is always a positive net welfare gain. The final model developed is one where the social planner sets the prize and the number of firms. Under certain conditions that model results in smaller total research expenditures than in the long-run model.
The education of Walter Kohn and the creation of density functional theory
The theoretical solid-state physicist Walter Kohn was awarded one-half of the
1998 Nobel Prize in Chemistry for his mid-1960's creation of an approach to the
many-particle problem in quantum mechanics called density functional theory
(DFT). In its exact form, DFT establishes that the total charge density of any
system of electrons and nuclei provides all the information needed for a
complete description of that system. This was a breakthrough for the study of
atoms, molecules, gases, liquids, and solids. Before DFT, it was thought that
only the vastly more complicated many-electron wave function was needed for a
complete description of such systems. Today, fifty years after its
introduction, DFT (in one of its approximate forms) is the method of choice
used by most scientists to calculate the physical properties of materials of
all kinds. In this paper, I present a biographical essay of Kohn's educational
experiences and professional career up to and including the creation of DFT
The 30th Anniversary of the Supercomputing Conference: Bringing the Future Closer - Supercomputing History and the Immortality of Now
A panel of experts discusses historical reflections on the past 30 years of the Supercomputing (SC) conference, its leading role for the professional community and some exciting future challenges
Faculty concert: The Muir String Quartet, April 13, 2000
This is the concert program of the Faculty Concert: The Muir String Quartet performance on Thursday, April 13, 2000 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue. Works performed were Quartet in D major for Flute and Strings, K. 285 by Wolfgang Amadeus Mozart, Piano Trio No. 1 by Michele Levin, Concertino for Flute, Viola and Double Bass by Erwin Schulhoff, Quartet for Strings, Op. 3 by Alban Berg, and Sextet for Two Violins, Two Violas and Two Cellos by E. Schulhoff. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund
History of Spin and Statistics
These lectures were given in the framework of the ``Dixi\`eme s\'eminaire
rhodanien de physique'' entitled ``Le spin en physique'', given at Villa
Gualino, Turin, March 2002. We have shown how the difficulties of
interpretation of atomic spectra led to the Pauli exclusion principle and to
the notion of spin, and then described the following steps: the Pauli spin with
22 matrices after the birth of "new" quantum mechanics, the Dirac
equation and the magnetic moment of the electron, the spins and magnetic
moments of other particles, proton, neutron and hyperons. Finally, we show the
crucial role of statistics in the stability of the world.Comment: latex file, 7 figures, 3 table
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