• Two new species of Kapateira Young from Costa Rica (Auchenorrhyncha: Cicadellidae: Cicadellinae) 

  Godoy Cabrera, Ivania Carolina; Garita Cambronero, Jerson; Rivera Herrero, Carmen; Villalobos Muller, William (2006-08)

  The genus Kapateira was described by Young (1977), who included one species from Colombia but noted that the genus also occurs in Panama, Venezuela, Eucador, and Bolivia. In this paper two new species are decribed, K. ...

• Two new species of Graphocephala Van Duzee from Costa Rica (Cicadellidae: Cicadellinae) 

  Godoy Cabrera, Ivania Carolina; Villalobos Muller, William (2006-08)

  The genus Grahocephala, which was described by Van Duzee (1916), is a large complex group distributed from southern Canada to Colombia, Venezuela, and French Guiana. Young (1977) revised the genus and described twelve new ...

• Collateral effects of microplastic pollution on aquatic microorganisms: An ecological perspective 

  Arias Andrés, María de Jesús; Rojas Jiménez, Keilor Osvaldo; Grossart, Hans-Peter (2018-12-05)

  Microplastics (MP) provide a unique and extensive surface for microbial colonization in aquatic ecosystems. The formation of microorganism-microplastic complexes, such as biofilms, maximizes the degradation of organic ...

• Biogeographical assessment of myxomycete assemblages from Neotropical and Asian Palaeotropical forests 

  Dagamac, Nikki Heherson; Novozhilov, Yuri K.; Stephenson, Steven L.; Lado Rodríguez, Carlos; Rojas Alvarado, Carlos Alonso; de la Cruz, Thomas Edison E.; Unterseher, Martin; Schnittler, Martin (2017-03-16)

  Aim Lowland/highland and Neotropical/Asian Palaeotropical assemblages of myxomycetes were compared to test the null hypothesis that neither species diversity nor species composition differs between the two ecoregions. ...

• Blaming it on the Weather: The Role of “Inclement” Rainfall in Society- Nature Relations in Liberal Costa Rica (1860-1940) 

  Goebel McDermott, Anthony; Viales Hurtado, Ronny José (2011)

  This article seeks to shed light on some of the many possible interactions between changes in rainfall regime, one of the climatic factors with the greatest bearing on the history of human society, and the economic and ...

• Composition, Chemical Fingerprinting and Antimicrobial Assessment of Costa Rican Cultivated Guavas (Psidium friedrichsthalianum (O. Berg) Nied. and Psidium guajava L.) Essential Oils from Leaves and Fruits 

  Granados Chinchilla, Fabio; Villegas Castro, Erick; Molina Alvarado, Andrea; Arias Álvarez, Carlos (2016-07-28)

  The essential oil of two related tree species, P. friedrichsthalianum and P. guajava, where obtained. A total of six different oil samples were recovered including leaves in dry/rainy season and fruits of both plant species. ...

• Propuesta metodológica para la predicción climática estacional de eventos extremos y días con precipitación. Estudio de caso: Sur de América Central 

  Maldonado Mora, Tito José; Alfaro Martínez, Eric J. (2011-11-10)

  Se describe una propuesta metodológica en donde se ajustaron modelos estadísticos usando el Análisis de Correlación Canónica para la predicción climática estacional del acumulado de precipitación, los días con precipitación, ...

• ¿Funcionan realmente los microorganismos de montaña (MM) como estrategia de biofertilización? Un enfoque de ingeniería de biosistemas 

  Umaña Carmona, Steven; Rodríguez Mora, Karina María; Rojas Alvarado, Carlos Alonso (2017-06-29)

  El uso de microorganismos en aplicaciones ingenieriles, en particular desde un contexto de ingeniería de biosistemas tropicales, es útil para comprender el efecto de variables que determinan la dinámica microbiológica ...

• Crystal structure of 4-[(adamantan-1-yl)amino]naphthalene-1,2-dione 

  Lamoureux Lamontagne, Guy; Pineda Cedeño, Leslie William; Alvarado Rojas, Mónica (2019)

  The title compound, C20H21NO2, an example of a stable 1,2-naphthoquinone, was determined by single-crystal X-ray diffraction analysis at 100 K. This structure illustrates steric buttressing of the adamantanyl group, forcing ...

• Different Messages are Transmitted by Individual Duet Contributions and Complete Duets in a Species with Highly Overlapped Duets 

  Sandoval Vargas, Luis Andrés; Juárez Jovel, Roselvy; Villarreal, Mauricio (2018)

  Background: Duet function hypotheses have been mostly studied in bird species that produce duets with male and female solo songs. However, in order to understand if patterns of duet function are similar across all duetting ...

• Ciencia, tecnología y educación en Costa Rica en el período 2010-2014 

  Granados Carvajal, Rafael Evelio; Calvo Solano, Oscar David (2017-09)

  En este artículo se analizaron las distintas redes vinculadas a la formulación de políticas públicas en la Comisión de Ciencia y Tecnología del Congreso de Costa Rica, entre el 2010 y 2014, con el propósito de describir ...

• Conceptual and statistical problems with the use of the Shannon-Weiner entropy index in bioacoustic analyses 

  Sandoval Vargas, Luis Andrés; Barrantes Montero, Gilbert; Wilson, David R. (2018-04-03)

  Information theory and its indices were developed for human communication to predict the amount of information transferred in a message. One such index, the Shannon-Weiner index (SWI), has often been used to analyse ...

• Kinship, association, and social complexity in bats 

  Wilkinson, Gerald S.; Carter, Gerald; Bohn, Kirsten M.; Barbara, Caspers; Chaverri Echandi, Gloriana; Farine, Damien; Günther, Linus; Kerth, Gerald; Knörnschild, Mirjam; Mayer, Frieder; Nagy, Martina; Ortega Reyes, Jorge; Patriquin, Krista (2019-01)

  Among mammals, bats exhibit extreme variation in sociality, with some species living largely solitary lives while others form colonies of more than a million individuals. Some tropical species form groups during the day ...

• Evolución de las ideas meteorológicas y el impacto del clima en la sociedad costarricene (1502-1860) 

  Solano Chaves, Flora J.; Díaz Bolaños, Ronald Eduardo; Amador Astúa, Jorge Alberto (2008-01)

  El libro incluye los antecedentes de la meteorología en Costa Rica: aspectos generales de la evolución inicial de la cultura científica costarricense, así como rasgos científicos observados en las primeras civilizaciones. ...

• Dual Function of Chip Calls Depending on Changing Call Rate Related to Risk Level in Territorial Pairs of White-Eared Ground-Sparrows 

  Méndez Vázquez, Carolina; Sandoval Vargas, Luis Andrés (2017-03)

  Different mechanisms have been proposed for encoding information into vocalizations: variation of frequency or temporal characteristics, variation in the rate of vocalization production, and use of different vocalization ...

• Faltings heights of CM elliptic curves and special Gamma values 

  Barquero Sánchez, Adrián Alberto; Cadwallader, Lindsay; Cannon, Olivia; Genao, Tyler; Masri, Riad (2017-12)

  In this paper, we evaluate the Faltings height of an elliptic curve with complex multiplication by an order in an imaginary quadratic field in terms of Euler’s Gamma function at rational arguments.

• On the Colmez conjecture for non-abelian CM fields 

  Barquero Sánchez, Adrián Alberto; Masri, Riad (2018-02-08)

  The Colmez conjecture relates the Faltings height of an abelian variety with complex multiplication by the ring of integers of a CM field E to logarithmic derivatives of Artin L-functions at s=0. In this paper, we prove ...

• The Chowla-Selberg formula for abelian CM fields and Faltings heights 

  Barquero Sánchez, Adrián Alberto; Masri, Riad (2016-03)

  In this paper we establish a Chowla-Selberg formula for abelian CM fields. This is an identity which relates values of a Hilbert modular function at CM points to values of Euler’s gamma function Γ and an analogous function ...

• sandy.beaches.ecology.cvs 

  Sibaja Cordero, Jeffrey Alejandro; Camacho García, Yolanda E.; Azofeifa Solano, Juan Carlos; Alvado Arranz, Barbara (2019-01)

  The data were taken from 28 sandy beaches of Costa Rica (16 from the Pacific Coast and 12 from the Caribbean). This study aimed to (1) determine the differences of sediment and beach characteristics between both Pacific ...

• The asymptotic distribution of Andrews’ smallest parts function 

  Banks, Josiah; Barquero Sánchez, Adrián Alberto; Masri, Riad; Sheng, Yan (2015-12)

  In this paper, we use methods from the spectral theory of automorphic forms to give an asymptotic formula with a power saving error term for Andrews’ smallest parts function spt(n). We use this formula to deduce an asymptotic ...

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