8,557 research outputs found
Bibliography of El Nino and associated publications
ENGLISH: Citations from the fields of biological, physical and chemical oceanography, meteorology and marine fisheries are used to compile a new bibliography on El Nino phenomena and associated publications. An alphanumeric coding procedure relating this bibliography to a newly microfilmed version of the contents of this bibliography is described. SPANISH: Se emplean las anotaciones del campo biológico, físico y químico de la oceanografía, la rneteorología y la pesca marina para compilar una nueva bibliografía sobre el fenómeno del Niño, y publicaciones afines. Se describe el procedimiento de un código alfanumérico relacionando esta bibliografía a una versión recientemente microfilmada del contenido de ésta.
(PDF contains 53 pages.
Study of Mesoscale Exchange Processes Utilizing LANDSAT Air Mass Cloud Imagery
There are no author-identified significant results in this report
Study of mesocale exchange processes utilizing LANDSAT air mass cloud imagery
There are no author-identified significant results in this report
A Key to Container-Breeding Mosquitoes of Michigan (Diptera: Cllllcidae), With Notes on Their Biology
An illustrated key to larvae and notes on the biology of container-breeding mosquitoes of Michigan are presented. Two species included in the key. Aedes aegypti and Aedes albopictus. are not endemic in Michigan, but occasional introductions could occur with commercial shipments of scrap tires or other containers
A Counterpart to the Radial Orbit Instability in Triaxial Stellar Systems
Self-consistent solutions for triaxial mass models are highly non-unique. In
general, some of these solutions might be dynamically unstable, making them
inappropriate as descriptions of steady-state galaxies. Here we demonstrate for
the first time the existence in triaxial galaxy models of an instability
similar to the radial-orbit instability of spherical models. The instability
manifests itself when the number of box orbits, with predominantly radially
motions, is sufficiently large. N-body simulations verify that the evolution is
due neither to chaotic orbits nor to departures of the model from
self-consistency, but rather to a collective mode. The instability transforms
the triaxial model into a more prolate, but still triaxial, configuration.
Stable triaxial models are obtained when the mass contribution of radial orbits
is reduced. The implications of our results for the shapes of dark-matter halos
are discussed.Comment: 14 pages, 16 figure
Statistical mechanics of collisionless orbits. II. Structure of halos
In this paper, we present the density, \rho, velocity dispersion, \sigma, and
\rho/\sigma^3 profiles of isotropic systems which have the energy distribution,
N(E)\propto[\exp(\phi_0-E)-1], derived in Paper I. This distribution, dubbed
DARKexp, is the most probable final state of a collisionless self-gravitating
system, which is relaxed in terms of particle energies, but not necessarily in
terms of angular momentum. We compare the DARKexp predictions with the results
obtained using the extended secondary infall model (ESIM). The ESIM numerical
scheme is optimally suited for the purpose because (1) it relaxes only through
energy redistribution, leaving shell/particle angular momenta unaltered, and
(2) being a shell code with radially increasing shell thickness it has very
good mass resolution in the inner halo, where the various theoretical
treatments give different predictions. The ESIM halo properties, and especially
their energy distributions, are very well fit by DARKexp, implying that the
techniques of statistical mechanics can be used to explain the structure of
relaxed self-gravitating systems.Comment: 17 pages, 8 figure
- …