6 Carola Martínez-Núñez, Pamela Altamirano-Silva, Francisco Alvarado7 Guillén, Edgardo Moreno, Caterina Guzmán-Verri and Esteban Chaves8 Olarte 9 Programa de Investigación en Enfermedades Tropicales (PIET), Escuela de 10 Medicina Veterinaria, Universidad Nacional, 304-3000 Heredia, Costa Rica; 11 Escuela de Biología, Universidad Nacional, 304-3000 Heredia, Costa Rica; 12 Facultad de Farmacia, U...

Fabio Granados-Chinchilla1*, Erick Villegas1, Andrea Molina1,2 and Carlos Arias3 1Centro de Investigación en Nutrición Animal (CINA), Universidad de Costa Rica, 11501-2060 Ciudad Universitaria Rodrigo Facio San Jose, Costa Rica 2Escuela de Zootecnia, Universidad de Costa Rica, 11501-2060 Ciudad Universitaria Rodrigo Facio San José, Costa Rica 3Escuela de Química and Centro de Investigación en P...

We propose a novel data collection architecture, called Ring-based Information Collection Architecture (RICA), for sensor networks. In the RICA scheme, sensors are organised into a ring. According to our study, the transmission delay time of data collection in a ring is only a half of that in PEGASIS, in which sensors are organised into a chain. We present a ring construction algorithm for RICA...

1 Centro de Investigación en Ciencias del Mar y Limnología, Universidad de Costa Rica, San José, Costa Rica, 2 Escuela de Biología, Universidad de Costa Rica, San José, Costa Rica, 3 Escuela de Ciencias Exactas y Naturales, Universidad Estatal a Distancia, San José, Costa Rica, 4 Museo de Zoología, Universidad de Costa Rica, San José, Costa Rica, 5 Laboratório de Ictiologia, Departamento de Zoo...

The following five species are described as new: Manota clavasp. n. (Colombia), Manota multilobatasp. n. (Colombia), Manota perplexasp. n. (Costa Rica), Manota setilobatasp. n. (Colombia) and Manota subaristatasp. n. (Colombia). In addition, new records for the following 11 species are presented: Manota acuminata Jaschhof & Hippa, 2005 (Costa Rica), Manota arenalensis Jaschhof & Hippa, 2005 (Co...

S U M M A R Y A high-quality data set of 3790 earthquakes were simultaneously inverted for hypocentre locations and 3-D P-wave velocities in Costa Rica. Tests with synthetic data and resolution estimates derived from the resolution matrix indicate that the velocity model is well constrained in central Costa Rica to a depth of 70 km; northwestern and southeastern Costa Rica are less well resolve...

1Department of Earth and Environmental Sciences, Palaeontology & Geobiology, Ludwig-Maximilians-Universität München, Richard-Wagner-Straße 10, 80333 München, Germany 2Centro de Investigación en Estructuras Microscópicas, Universidad de Costa Rica. P.O. Box 11501-2060, Universidad de Costa Rica, San José, Costa Rica 3Centro de Investigaciń en Ciencias del Mar y Limnología, Escuela de Biología, U...

Heterotrimeric G proteins (G proteins) govern growth, development, and secondary metabolism in various fungi. Here, we characterized ricA, which encodes a putative GDP/GTP exchange factor for G proteins in the model fungus Aspergillus nidulans and the opportunistic human pathogen Aspergillus fumigatus. In both species, ricA mRNA accumulates during vegetative growth and early developmental phase...

Wormaldia McLachlan 1865 is the 2nd largest genus in the family Philopotamidae (Trichoptera) after Chimarra Stephens 1829 and is diverse and widely distributed, with ca. 175 extant species in all biogeographic regions except the Australasian. In this monograph, 14 previously described species are recognized for the Neotropical region: W. alicia Bueno-Soria, Santiago-Fragoso, & Barba-Alvarez 200...

In the course of two trips to Central America (June 1967 and JulyAugust 1976) I had the opportunity of collecting topotypic specimens of Planorbis nicaraguanus Morelet, 1849, anatomically defined in this paper, and of P. yzabalensis Crosse & Fischer, 1879, the identity of the latter with Drepanotrema anatinum (Orbigny, 1835) is confirmed. The following planorbid species were also found: Helisom...