17,600 research outputs found
Schlesinger transformations for elliptic isomonodromic deformations
Schlesinger transformations are discrete monodromy preserving symmetry
transformations of the classical Schlesinger system. Generalizing well-known
results from the Riemann sphere we construct these transformations for
isomonodromic deformations on genus one Riemann surfaces. Their action on the
system's tau-function is computed and we obtain an explicit expression for the
ratio of the old and the transformed tau-function.Comment: 19 pages, LaTeX2
A review of the Japanese longline fishery for tunas and billfishes in the eastern Pacific Ocean, 1993-1997
English:
This report reviews the Japanese longline fishery in the eastern Pacific Ocean during
the 1993-1997 period, extending the studies for the 1956-1992 period made by other investigators.
The spatial and temporal distributions of fishing effort, catch, apparent abundance,
sexual maturity, and size composition are examined for the principal species of tunas
and billfishes taken by that fishery. Some information on the catches of sharks by the
Japanese longline fishery is given. The interactions between the surface and longline fisheries
are discussed.
Spanish:
En este informe se presenta un análisis de la actividad pesquera de buques
palangreros japoneses en el Océano PacÃfico oriental durante el perÃodo de 1993-1997,
extendiendo los estudios del perÃodo de 1956-1992 realizados por otros investigadores. Se
examinan las distribuciones espacial y temporal del esfuerzo de pesca, la captura, la
abundancia aparente, la madurez sexual, y la composición por talla de las principales
especies de atunes y picudos capturadas por dicha pesquerÃa. Se presenta cierta información
sobre las capturas de tiburones por la pesquerÃa palangrera japonesa. Se describen las
interacciones entre las pesquerÃas de superficie y palangrera
Equivalent hyperon-nucleon interactions in low-momentum space
Equivalent interactions in a low-momentum space for the , and interactions are calculated, using the SU quark model
potential as well as the Nijmegen OBEP model as the input bare interaction.
Because the two-body scattering data has not been accumulated sufficiently to
determine the hyperon-nucleon interactions unambiguously, the construction of
the potential even in low-energy regions has to rely on a theoretical model.
The equivalent interaction after removing high-momentum components is still
model dependent. Because this model dependence reflects the character of the
underlying potential model, it is instructive for better understanding of
baryon-baryon interactions in the strangeness sector to study the low-momentum
space interactions.Comment: 9 pages, 13 figures, accepted for publication in Phys. Rev.
Finite-size scaling of helix-coil transitions in poly-alanine studied by multicanonical simulations
We report results from multicanonical simulations of poly-alanine.
Homopolymers of up to 30 amino acids were considered and various thermodynamic
quantities as a function of temperature calculated. We study the nature of the
observed helix-coil transition and present estimates for critical exponents.Comment: to appear in J.Chem.Phys. (Jan 99
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