17,298 research outputs found
The Irregular Variable Ku Her: The Light And Period Variations
We present CCD photometric observations of the slow irregular type variable
KU Her. We have also used observations from the ASAS Database and the AAVSO
International Database. The V-band observations span eight years from August of
2002 to September of 2010. The length and density of the data enable us to look
for variations on time scales ranging from days to years. The V-band
observations of KU Her are analysed to derive periodicity. This analysis was an
approach to find the fundamental periods of the variability of KU Her. Analysis
of the KU Her light variation indicates a complex combination of different
periods. Five main and three harmonic periods are identified. In addition to
the period analysis, we present the colour variations of the star.Comment: 14 pages, 4 figure
Universality for mathematical and physical systems
All physical systems in equilibrium obey the laws of thermodynamics. In other
words, whatever the precise nature of the interaction between the atoms and
molecules at the microscopic level, at the macroscopic level, physical systems
exhibit universal behavior in the sense that they are all governed by the same
laws and formulae of thermodynamics. In this paper we describe some recent
history of universality ideas in physics starting with Wigner's model for the
scattering of neutrons off large nuclei and show how these ideas have led
mathematicians to investigate universal behavior for a variety of mathematical
systems. This is true not only for systems which have a physical origin, but
also for systems which arise in a purely mathematical context such as the
Riemann hypothesis, and a version of the card game solitaire called patience
sorting.Comment: New version contains some additional explication of the problems
considered in the text and additional reference
Lambda Dependency-Based Compositional Semantics
This short note presents a new formal language, lambda dependency-based
compositional semantics (lambda DCS) for representing logical forms in semantic
parsing. By eliminating variables and making existential quantification
implicit, lambda DCS logical forms are generally more compact than those in
lambda calculus
Some Open Problems in Random Matrix Theory and the Theory of Integrable Systems. II
We describe a list of open problems in random matrix theory and the theory of
integrable systems that was presented at the conference Asymptotics in
Integrable Systems, Random Matrices and Random Processes and Universality,
Centre de Recherches Mathematiques, Montreal, June 7-11, 2015. We also describe
progress that has been made on problems in an earlier list presented by the
author on the occasion of his 60th birthday in 2005 (see [Deift P., Contemp.
Math., Vol. 458, Amer. Math. Soc., Providence, RI, 2008, 419-430,
arXiv:0712.0849]).Comment: for Part I see arXiv:0712.084
The teaching of modern languages in the United States
Thesis (M.A.)--Boston Universit
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