Results 31 to 40 of about 60,054 (191)

Software Radio para antenas inteligentes en comunicaciones personales multistandard [PDF]

, 1998
Peer ReviewedPostprint (published ...
Cabrera-Bean, Margarita, Fonollosa, Javier R, Lagunas Hernandez, Miguel A., Mestre Pons, Francesc X., Mestre, Xavier, Pérez Neira, Ana Isabel, Vidal Manzano, José   +6 more
core  

The specialised buzz pollination syndrome poses a partial barrier to plant invasions

Journal of Ecology, Volume 112, Issue 8, Page 1686-1700, August 2024.
We found that plants that exhibit traits consistent with the buzz‐pollination syndrome are underrepresented as invasive species across the globe. Our result suggests that the specialist buzz‐pollination syndrome poses a partial barrier to plant invasions. Our review also highlighted six alternative insect behaviours that can enable invasive plants with
Laura C. Lopresti, Lori Lach, Daniel Montesinos   +2 more
wiley   +1 more source

Portable low profile antenna at X-band [PDF]

, 2011
An antenna which has been conceived as a portable system for satellite communications based on the recommendations ITU-R S.580-6 and ITU-R S.465-5 for small antennas, i.e., with a diameter lower than 50 wavelengths, is introduced.
Fernández González, José Manuel, García Aguilar, Andrés, Inclán Alonso, José Manuel, Sanmartin Jara, J., Sierra Pérez, Manuel, Sierra Pérez, Manuel, Vigil Herrero, Lucía   +6 more
core   +1 more source

Artificial Intelligence applications in Noise Radar Technology

IET Radar, Sonar &Navigation, Volume 18, Issue 7, Page 986-1001, July 2024.
Abstract Radar systems are a topic of great interest, especially due to their extensive range of applications and ability to operate in all weather conditions. Modern radars have high requirements such as its resolution, accuracy and robustness, depending on the application.
Afonso L. Sénica, Paulo A. C. Marques, Mário A. T. Figueiredo   +2 more
wiley   +1 more source

Revisión sistemática de Mesolecanium Cockerell de la región Neotropical (Hemiptera: Coccidae), con sinonimia y combinaciones nuevas [PDF]

, 2012
Redescriptions and illustrations of 14 neotropical species included in Mesolecanium Cockerell are given. Eight species: Mesolecanium baccharidis (Cockerell), Mesolecanium impar (Cockerell), Mesolecanium mayteni Hempel, Mesolecanium nocturnum (Cockerell ...
Granara de Willink, María Cristina
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Notes on Verbal Aspect in Three Vedic Prose Narratives

Transactions of the Philological Society, Volume 122, Issue 2, Page 223-253, July 2024.
Abstract This article summarises the synchronic system of verbal aspect manifest in three Middle Vedic prose narrative texts, investigating the use of various morphological categories with past reference (especially the imperfect, perfect and aorist). I show that the imperfect and perfect are both compatible with multiple aspectual readings (perfective,
Anahita Gwenllian Hoose
wiley   +1 more source

Ensinando os fundamentos de redes de sensores sem fio usando um sistema simples

Revista Brasileira de Ensino de Física
A monitoragão eletrônica usando redes de sensores sem fio é uma área do conhecimento humano que vêm sendo investigada sob diversos aspectos tanto paxa averiguar seu funcionamento a priori quanto para avaliar suas aplicagões futuras.
Luciana Vieira Piza, Aldo Ivan Céspedes Arce, Adriano Rogério Bruno Tech, Ernane José Xavier Costa   +3 more
doaj   +1 more source

ESTUDIO DE LA APLICACIÓN DE LOS METAMATERIALES EN EL DISEÑO DE ATENAS TEXTILES

Revista Politécnica, 2019
Este articulo presenta una revisión documental concerniente al diseño de antenas textiles a través del uso de metamateriales; mencionando también los tipos de antenas, sus técnicas de implementación, su elaboración, los materiales para su construcción y ...
Claudia Herrera, María Restrepo , Leidy Sánchez   +2 more
doaj   +1 more source

Antenas nano-estructuradas: de su construcción como fractales [PDF]

, 2014
Investigación TecnológicaEste trabajo describe los conceptos básicos de antenas, y la construcción de antenas nano estructuradas, específicamente con geometrías fractales.PregradoIngeniero ...
Castro-Rivera, Rafael David Eduardo Hermes, Galvis-Botía, Víctor Hugo   +1 more
core  

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