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Now showing items 411-420 of 1211
Ecosystemic Assessment of Surface Water Quality in the Virilla River: Towards Sanitation Processes in Costa Rica
(Universidad Nacional (Costa Rica), 2018)
Water quality information is essential supporting decision making in water management
processes. The lack of information restricts, at some point, the implementation of adequate sanitation,
which is still scarce in ...
Efficacy of calcein and Coomassie Blue dyeing of shell growing-edges and micro growth-bands: Ageing juvenile of Pinctada mazatlanica(Pterioida: Pteriidae)
(Universidad de Costa Rica, 2014)
Age validation is the first step to determine shellfish species age determination. This information is vital for different inferential models used in marine ecosystem management activities. In spite that various validation ...
Effectiveness of N-waves for predicting morphological changes due to tsunamis
(Elsevier, 2018)
The research on morphological changes caused by tsunamis has increased considerably in the last few
years, yet the processes behind this phenomenon are still not fully understood. This paper analyzes
and compares numerical ...
Feasibility of dose enhancement assessment: preliminary results by means of Gd-infused polymer gel dosimeter and Monte Carlo study
(Universidad Nacional (Costa Rica), 2018)
This work reports the experimental development of an integral Gd-infused dosimeter suitable for Gd dose
enhancement assessment along with Monte Carlo simulations applied to determine the dose enhancement by
radioactive ...
Neotropical flowering epiphyte diversity: local composition and geographic affinities
(Universidad Nacional, Costa Rica, 2013)
Worldwide, the highest diversity of vascular epiphytic plants resides in the
Neotropics. The general pattern of taxonomic composition of the neotropical epiphytic
flora has been described, but information regarding the ...
Feeding ecology of invasive lionfish (Pterois volitans and Pterois miles) in the temperate and tropical western Atlantic
(Universidad Nacional (Costa Rica), 2018-03-11)
Numerous location-based diet studies
have been published describing different aspects of
invasive lionfish (Pterois volitans and Pterois miles)
feeding ecology, but there has been no synthesis of
their diet composition ...
Moribaetis brachiostrinus (Ephemeroptera: Baetidae), a new species of mayfly from Costa Rica
(Magnolia Press, 2018)
A new species of Moribaetis is described based on nymphs from the Nicoya peninsula. The new species can be distin guished from the other described species of the genus, among other characteristics, by its short antennae, ...
Methane Dynamics in a Tropical Serpentinizing Environment: The Santa Elena Ophiolite, Costa Rica
(Universidad Nacional (Costa Rica), 2017)
Uplifted ultramafic rocks represent an important vector for the transfer of carbon and
reducing power from the deep subsurface into the biosphere and potentially support
microbial life through serpentinization. This ...
Mesoamerican tree squirrels evolution (Rodentia: Sciuridae): a molecular phylogenetic analysis
(Universidad de Costa Rica, 2014)
The tribe Sciurini comprehends the genera Sciurus, Syntheosiurus, Microsciurus, Tamiasciurus and
Rheinthrosciurus. The phylogenetic relationships within Sciurus have been only partially done, and the relation ship between ...
Retos y oportunidades del software libre en la administración pública en Costa Rica
(Programa de las Naciones Unidas para el Desarrollo (PNUD - Costa Rica). Universidad Nacional (Costa Rica), 2013)
La crisis económica mundial de los últimos cinco años ha traído consigo una reducción sustancial de la
inversión pública en muchos países y la imposición de políticas de austeridad a nivel global. Estas estrategias ...