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Now showing items 21-40 of 4649
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A cross-sectional survey of gastrointestinal parasites with dispersal stages in feces from Costa Rican dairy calves
(Elsevier B.V, 2010-07-24)A cross-sectional study was carried out to determine the prevalence of gastrointestinal parasites and lungworm nematodes in dairy calves from five different ecoclimatic areas of Costa Rica. Also intensity of infection ... -
A dialogue of shared discoveries on immigration: a duoethnography of international students in Canada
(Springer, 2019-04-19)International students are believed to contribute signifcantly in education and research as they bring a rich variety of perspectives, experiences, and languages. International students are frequently categorized into ... -
A Differential Effect of Indian Ocean Dipole and El Niño on Cholera Dynamics in Bangladesh
(PLoS ONE, 2013-03-29)Background: A stationary (i.e., constant through time) association between El Niño Southern Oscillation (ENSO), the Indian Ocean Dipole (IOD) and epidemics of cholera in Bangladesh has been widely assumed. However, whether ... -
A dupla serpente: poder político e poder econômico na formação do capitalismo
(Universidad Nacional, Costa Rica, 2013-01-30)O presente artigo analisa a relação histórica entre poder político e econômico na formação do capitalismo, desde a perspectiva do tempo longo e do papel que o poder teve na configuração da economia e da sociedade na Europa ... -
A dynamic simulation model for the blooming of Oscillatoria agardhii in a monomictic lake
(Elsevier, 1995-01-15)The occurrence of phytoplankton blooms is a common problem in water bodies. The quantitative description of the algal population growth is of primary importance to understand the mechanisms which lead to these phytoplankton ... -
A female of Eudorylaimus sp with two vulvae.
(Universidad Nacional, Costa Rica, 2001)A female of Eudorylaimus sp, with two vulvae was found in Tempisque Conservation Area in Costa Rica. Thousands of nematodes have been prepared in Cobb's slides to study nematode diversity in Costa Rica; nevertheless, only ... -
A first estimation of tsunami hazard of the Pacific coast of Costa Rica from local and distant seismogenic sources
(Springer, 2021-06-04)Costa Rica has been affected by several local and distant tsunamis in the past, but the historical information is scarce and incomplete. Its Pacific coast stretches for over a thousand kilometers, and tsunami hazard has ... -
A joint Myxoma in a dog
(Harcourt Publishers Ltd, 2001)Myxomas of the joints are extremely rare in domestic animals, only four cases, all in dogs, having been reported previously. This paper describes a myxoma originating from the synovium of the right radiocarpal joint of ... -
A la deriva
(La República, 2019-07-02)Es el nombre de mi ultimo libro que resume las columnas y escritos de este último quinquenio. Se trata de un repaso de la realidad social, económica y política del país, en medio de una creciente incapacidad para tomar ... -
A lightweight environment for 2D visual applications
(EasyChair, 2019)People and organizations constantly use a wide variety of devices and formats to produce large volumes of data. This involves a series of challenges related to processing and transforming data into valuable knowledge to ... -
A long-term record of polythionates in the acid crater-lake of Poás volcano: Changes in the subaqueous input of fumarolic gases
(IAVCEI. General Assembly. Pucón-Chile, 2004-01) -
A management plan for the sport fishery of Parachromis dovii (Pisces: Cichlidae) in Hule lake, Costa Rica
(Universidad de Costa Rica, 2000-06)A first attempt to regulate the fishing activity while preserving the species and its habitats is presented for Hule lake. We intensively sampled the "guapote" between March 1996 and April 1997 using monofilament gill nets ... -
A methane sink in the Central American high elevation páramo: Topographic, soil moisture and vegetation effects
(Elsevier B.V., 2020-03-15)Methane (CH4) is a strong greenhouse gas with a global warming potential 23 times larger than that of carbon dioxide. Characterizing ecosystems as either sources or sinks for methane and their magnitudes informs on biosphere ... -
A method to obtain rapid zoosporogenesis of Pythium insidiosum
(Kluwer Academic Publishers, 1988-10)Nine strains of Pythium insidiosum the etiologic agent of pythiosis, were inoculated on 2% water agar plus grass blades and then incubated one day at 25°C, 35°C and 37°C. Sporangium and secondary biflagellate-type zoosporas ... -
A Microscopic Model for a One Parameter Class of Fractional Laplacians with Dirichlet Boundary Conditions
(Springer Science and Business Media Deutschland GmbH, 2021)We prove the hydrodynamic limit for the symmetric exclusion process with long jumps given by a mean zero probability transition rate with infinite variance and in contact with infinitely many reservoirs with density α ... -
A mixed virtual element method for a pseudostress-based formulation of linear elasticity
(Elsevier B.V., 2019)In this paper we introduce and analyze a mixed virtual element method (mixed-VEM) for a pseudostress-displacement formulation of the linear elasticity problem with non homogeneous Dirichlet boundary conditions. We follow ... -
A mixed virtual element method for quasi-Newtonian stokes flows
(SIAM, 2018)In this paper we introduce and analyze a virtual element method (VEM) for an augmented mixed variational formulation of a class of nonlinear Stokes models arising in quasi-Newtonian fluids. While the original unknowns are ... -
A mixed virtual element method for the boussinesq problem on polygonal meshes
(Global Science Press, 2021)In this work we introduce and analyze a mixed virtual element method (mixed-VEM) for the two-dimensional stationary Boussinesq problem. The continuous formulation is based on the introduction of a pseudostress tensor ... -
A mixed virtual element method for the Brinkman problem
(Mathematical Models and Methods in Applied Sciences vol.27 no.4 707-743 2017, 2017)In this paper, we introduce and analyze a mixed virtual element method (mixed-VEM) for the two-dimensional Brinkman model of porous media flow with non-homogeneous Dirichlet boundary conditions. More precisely, we employ ... -
A Monte Carlo Study of the Photon Spectrum due to the Different Materials Used in the Construction of Flattening Filters of LINAC
(Hindawi, 2017-07-10)Different types the spectrum of photons were studied; they were emitted from the flattening filter of a LINAC Varian 2100 C/D that operates at 15 MV. The simplified geometry of the LINAC head was calculated using the MCNPX ...