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Mostrando ítems 861-870 de 1605
Phase-space representation for Galilean quantum particles of arbitrary spin
(1988-09)
The phase-space approach to quantization is extended to incorporate
spinning particles with Galilean symmetry. The appropriate phase space
is the coadjoint orbit R^6 x S^2. From two basic principles,
traciality and ...
Simulated overfishing and natural eutrophication promote the relative success of a non-indigenous ascidian in coral reefs at the Pacific coast of Costa Rica
(2017)
Colonial ascidians of the genus Didemnum are common fouling organisms and are typically associated with degraded ecosystems
and anthropogenic structures installed in the sea. In this study, however, the non-indigenous ...
Gastropods and bivalves taken as by-catch in the deep-water shrimp trawl-fishery along the Pacific coast of Costa Rica, Central America
(2017)
Deep-water habitats are among the least studied but most vulnerable environments. By-catch data from deep-water fisheries in Latin America are limited, and detailed reports on associated molluscs are scarce. This study ...
Meiotic Chromosome Behavior and Capsule Setting in Doritaenopsis Hybrids
(J. AMER. SOC. HORT. SCI. 133(1):107–116. 2008, 2008-10-06)
The development of new cultivars in Doritaenopsis Guillaum. & Lami orchids is often hindered by factors such as low seed count in hybrids. Cytological study may offer the ability to develop new hybrids by revealing cultivars ...
Selfing in epiphytic bromeliads compensates for the limited pollination services provided by nectarivorous bats in a neotropical montane forest
(2024-02)
Plants with specialized pollination systems frequently exhibit adaptations for self-pollination, and this contradictory situation has been explained in terms of the reproductive assurance function of selfing. In the ...
Genetic And Morphological Variation Of The Sooty-capped Bush Tanager (Chlorospingus Pileatus), A Highland Endemic Species From Costa Rica And Western Panama
(2010)
We examined the effect of geographic isolation on morphology, genetic structure, and abundance of the Sooty-capped Bush Tanager (Chlorospingus pileatus), an endemic species restricted to highlands of Costa Rica and western ...
What can myxomycetes tell us about floricolous microbial systems?
(2017-02)
The study described herein was conducted in Costa Rica in an effort to generate baseline data on the association between tropical inflorescences and a group of microorganisms known as myxomycetes. The assemblage structure ...
The role of lowlevel circulation on water vapour transport to central and northern South America: Insights from a 2D Lagrangian approach
(2020)
The potential role of low-level circulation on the transport of atmospheric
moisture towards Central America and northern South America is studied
with the Dynamical Recycling Model (DRM) for the period 1981–2015. The
net ...
On asymptotic expansions of twisted products
(1989-12)
The series development of the quantum-mechanical twisted product is
studied. The series is shown to make sense as a moment asymptotic
expansion of the integral formula for the twisted product, either
pointwise or in the ...
Errores en la medición de la temperatura del aire en una caseta meteorológica tipo Stevenson
(Cienc. Tec. 7 (1): 207-222,1983, 1983)
The temperature of the air inside a double louvered meteorological screen relative to the temperature of the air outside the screen was considered. differences of the order of ±O.6 °C were recorded, due apparently to lack ...