Results 41 to 50 of about 363,776 (221)

Community‐driven variations in snow algae color modulate snow albedo reduction

New Phytologist, Volume 249, Issue 4, Page 1739-1752, February 2026.
Summary Snow algae blooms visibly alter snow color and surface energy balance, yet the biological basis of this variability remains unclear. We investigated how pigment composition and community structure shape the optical properties of snow algae blooms of distinct colors – red, orange, and green – co‐occurring within the same snowfield in Glacier ...
Pablo Almela, James J. Elser, Anthony Zmuda, Thomas Niehaus, Trinity L. Hamilton   +4 more
wiley   +1 more source

Evolução do Sistema Solar Primordial em Termos de Grande História e Evolução Universal

Journal of Big History, 2018
A presente contribuição é dedicada a alguns aspectos da história e evolução do Sistema Solar primordial. A origem do Sol, da Terra, de outros planetas e dos seus satélites tem sido de grande interesse para as pessoas.
Leonid Grinin
doaj   +1 more source

Proyecto instalación de un sistema solar térmico para la producción de agua caliente sanitaria en el edificio de deportes UNAN-FAREM-ESTELÍ para uso didáctico en la carrera de Ingeniería en Energías Renovables. [PDF]

, 2017
El proyecto contempla la instalación de un sistema solar térmico para la producción de agua caliente sanitaria ACS en el edificio de deporte de la Universidad Nacional Autónoma de Nicaragua, FAREM-Estelí, con el propósito fundamental de proveer a los ...
Cruz Olivas, Lesther Francisco, Guevara Gutiérrez, Darwin Manuel, Terán Mayorga, Silvio Alfonso   +2 more
core  

Diurnal and semidiurnal cyclicity of Radon (222Rn) in groundwater, Giardino Spring, Central Apennines, Italy [PDF]

, 2018
Understanding natural variations of Rn (222Rn) concentrations is the fundamental prerequisite of using this radioactive gas as a tracer, or even precursor, of natural processes, including earthquakes. In this work, Rn concentrations in groundwater were
Barberio, MARINO DOMENICO, Barbieri, Maurizio, Billi, Andrea, Devoti, Roberto, Doglioni, Carlo, Gori, Francesca, Petitta, Marco, Riguzzi, Federica, Rusi, Sergio   +8 more
core   +2 more sources

Diversification and intensification of irrigated maize‐based cropping systems under Mediterranean conditions

Agronomy Journal, Volume 118, Issue 1, January/February 2026.
Abstract Under Mediterranean irrigated conditions cover cropping (CC) and double cropping (DC) are diversification/intensification strategies that can increase grain yield and resource use efficiency of the traditional winter fallow‐maize (Zea mays L.) system.
I. Zugasti‐López, R. Isla, J. Cavero
wiley   +1 more source

Estudo comparativo do desempenho da tecnologia de termossifão e de circulação forçada no âmbito do aquecimento solar térmico [PDF]

, 2012
O objeto da presente tese é o estudo comparativo do desempenho de soluções de aquecimento de águas quentes sanitárias (AQS) de dois sistemas solares alternativos, um sistema do tipo Termossifão “versus” um sistema de Circulação Forçada.
Santiago, Miguel Gomes Aguiar Pina
core  

Floral shape and color impact heat accumulation and thermal stability of the floral microenvironment in a subalpine meadow

American Journal of Botany, Volume 113, Issue 1, January 2026.
Abstract Premise The floral thermal microenvironment impacts plant reproduction through its effects on gametophyte performance and plant–pollinator interactions. Color and shape are axes of floral variation that may mediate floral temperature because they affect the absorption and reflection of solar radiation, but their interactive effects are unclear.
Jennifer S. Apland, Katherine E. Riddle, Matthew H. Koski   +2 more
wiley   +1 more source

VALIDACIÓN Y CONFIABILIDAD DE UN SISTEMA AUTOMÁTICO BASADO EN COMPUTADORA PARA LA MONITORIZACIÓN DE LA IRRADIACIÓN SOLAR EN IQUITOS

Ciencia Amazónica (Iquitos), 2011
El presente estudio describe el desarrollo de un sistema automático basado en computadora para la monitorización de la irradiación solar. El objetivo principal fue complementar con esta monitorización un sistema integral para la vigilancia de la calidad ...
Arturo Díaz, Manuel Velásquez, Carlos Araujo   +2 more
doaj   +3 more sources

Heat drastically alters floral color and pigment composition without affecting flower conspicuousness

American Journal of Botany, Volume 113, Issue 1, January 2026.
Abstract Premise Floral pigments primarily serve to attract pollinators through color display and also contribute to protection against environmental stress. Although pigment composition can be plastically altered under stress, its impact on pollinator color perception remains poorly understood.
Eduardo Narbona, Francisco Perfectti, Adela González‐Megías, Luis Navarro, José C. del Valle, Cristina Armas, José M. Gómez   +6 more
wiley   +1 more source

Control Óptimo Aplicado a Campos de Colectores Solares Distribuidos

Revista Iberoamericana de Automática e Informática Industrial RIAI, 2018
En este trabajo se describe el control de una planta solar de colectores cilíndrico parabólicos cuando la radiación solar está sometida a variaciones debidas al paso de nubes.
Francisco R. Rubio, Sergio J. Navas, Pedro Ollero, Joao M. Lemos, Manuel G. Ortega   +4 more
doaj   +1 more source