Results 21 to 30 of about 477 (169)

WAVEGUIDE ANTENNA PROPOSAL WITH RESONANT SLOTS FOR WLAN APPLICATIONS

Telemática, 2020
The Slotted Waveguide Antenna (SAW) are chosen as very economical antennas because they have high relative gain values and a structure with little complexity.
Nayrebis Bethart Rodríguez, Tuan Ernesto Cordoví Rodríguez, Roberto Jiménez Hernández, David Beltrán Casanova   +3 more
doaj  

Qué sabemos a partir de los estudios epidemiológicos sobre la exposición residencial a ondas de radiofrecuencia y su relación con el cáncer

Revista de Salud Ambiental, 2004
En esta revisión se presentan y comentan los estudios existentes sobre la exposición residencial a campos de radiofrecuencia con relación a un posible aumento de incidencia o de mortalidad por cáncer.
Marina Pollán Santamaría
doaj   +2 more sources

Constricted spatiotemporal foraging of the regenerating salamander, Bolitoglossa mombachoensis

Ecosphere, Volume 10, Issue 10, October 2019., 2019
Abstract Bolitoglossa mombachoensis is an endemic neotropical salamander of the Mombacho Volcano, Nicaragua. Canopy communities within the tropics are hubs for biodiversity, and many tropical plethodontids have a foraging preference for epiphytic plants, such as bromeliads, which provide moist microclimates for shelter, foraging, and nesting.
Roger A. Mendieta Donaire, Jose M. Zolotoff Pallais, Ji Suk Chung, Maria A. Cobos Rizo, Marcelo De los Santos Rosales, Jiehong Jun Lee, Roberto M. Sandino Jaen, Elinor M. Ketelhohn Clancy, Martin M. Casco‐Robles   +8 more
wiley   +1 more source

Penerapan Antena MIMO Pada Sistem Antena SISO

SINUSOIDA
Perkembangan teknologi komunikasi bergerak dimulai dengan teknologi 2G kemudian berkembang ke 2.5G (GPRS), lalu meningkat ke teknologi 3G yang pada akhirnya berkembang lebih jauh lagi ke 3.5G (HSDPA) yang bertujuan untuk memenuhi kebutuhan akan peningkatan layanan data kepada pelanggan.
Heru Abrianto, Irmayani Irmayani, Aroli Ignatius Zai   +2 more
openaire   +1 more source

Medidas morfométricas de fêmeas e machos de Oncideres dejeani Thompson, 1868 (Coleoptera: Cerambycidae) [PDF]

Ciência Rural, 2006
O objetivo deste trabalho foi identificar aspectos morfológicos de Oncideres dejeani que possibilitem a diferenciação sexual destes insetos. Dados da morfometria de 25 casais de insetos obtidos com auxílio de um microscópio estereoscópico e de um ...
Rita de Cássia Andrade dos Santos Seffrin, Ervandil Corrêa Costa, Mara Rúbia Machado Couto, Sidinei José Lopes   +3 more
doaj   +1 more source

Functional Diversity and Community Composition of Soil Fungi Associated With Canopy Dieback in Araucaria araucana Forests of Contrasting Edaphic Conditions

Environmental Microbiology Reports, Volume 18, Issue 3, June 2026.
Soil fungal communities associated with Araucaria araucana differ primarily according to site edaphic conditions rather than tree health status. Restrictive, nutrient‐poor soils are linked to higher canopy dieback and distinct functional community shifts, with symptomatic trees harbouring stress‐tolerant taxa and asymptomatic trees supporting ...
Valeria Arriagada, Adrian Garrido, Francisca Madariaga, Rodrigo Hasbun, Eugenio Sanfuentes   +4 more
wiley   +1 more source

Monitoring Accessibility Services in Digital Television

International Journal of Digital Multimedia Broadcasting, Volume 2012, Issue 1, 2012., 2012
This paper addresses methodology and tools applied to the monitoring of accessibility services in digital television at a time when the principles of accessibility and design are being considered in all new audiovisual media communication services. The main objective of this research is to measure the quality and quantity of existing accessibility ...
Francisco Utray, Mercedes de Castro, Lourdes Moreno, Belén Ruiz-Mezcua, Thomas John Owens   +4 more
wiley   +1 more source

Attitudes to Nigerian Englishes in higher education

World Englishes, Volume 45, Issue 1, Page 144-162, March 2026.
Abstract Although there is a bourgeoning of studies on attitudes towards Nigerian Englishes, there is limited research on the effects of participants’ discipline (STEM and non‐STEM) and the type of secondary school (private and government) they attended in evaluating Nigerian Englishes.
Sopuruchi Christian Aboh
wiley   +1 more source

Revision of Manettia (Rubiaceae) in Paraguay

Nordic Journal of Botany, Volume 2026, Issue 2, February 2026.
Manettia Mutis is a Neotropical genus comprising over 100 species, many of which are only known from their original descriptions or, at most, from revisions dating back over 100 years. Recent review studies have remained unpublished for several years. Conventional taxonomic methods are followed.
Silvana Yasmin Gauto, Ana Maria Gonzalez, Roberto Manuel Salas   +2 more
wiley   +1 more source

Carbon Emissions From Low‐Order Streams in a Tropical, High‐Elevation, Peatland Ecosystem Are Mediated by Catchment Morphology

Water Resources Research, Volume 61, Issue 4, April 2025.
Abstract Inland waters emit large amounts of carbon and are key players in the global carbon budget. Particularly high rates of carbon emissions have been reported in streams draining mountains, tropical regions, and peatlands. However, few studies have examined the spatial variability of CO2 concentrations and fluxes occurring within these systems ...
Keridwen M. Whitmore, Amanda G. DelVecchia, Elizabeth Farquhar, Gerard Rocher‐Ros, Esteban Suárez, Diego A. Riveros‐Iregui   +5 more
wiley   +1 more source