Results 31 to 40 of about 2,668 (182)

Behind the Door: Practical Parameterization of Propagation Parameters for IEEE 802.11ad Use Cases

open access: yesTechnologies
The integration of the 60 GHz band into the IEEE 802.11 standard has revolutionized indoor wireless services. However, this band presents unique challenges to indoor wireless communication infrastructure, originally designed to handle data traffic in ...
Luciano Ahumada   +4 more
doaj   +1 more source

Determinantes del desempeño innovador empresarial en el subsector de telecomunicaciones en Colombia, periodo 2018-2019

open access: yesInnovar: Revista de Ciencias Administrativas y Sociales, 2023
Una parte significativa de las empresas de telecomunicaciones no tiene desempeño innovador que permita asegurar una sostenibilidad empresarial en el tiempo.
Esperanza Rincón Castiblanco   +3 more
doaj   +1 more source

Enhancing Magneto‐Dielectric Material Characterization by Integrating SRR Sensor, De‐Embedding Procedure, and Artificial Neural Network Modeling

open access: yesRadio Science, Volume 60, Issue 10, October 2025.
Abstract This work presents an improved methodology for characterizing the effective permittivity (ε) and permeability (μ) of magnetodielectric (MD) composites, using Fe3O4 nanoparticles dispersed in a PDMS polymer matrix. The proposed approach integrates a planar split‐ring resonator sensor design and an artificial neural network model for parameter ...
G. Álvarez‐Botero   +10 more
wiley   +1 more source

Recomendaciones para el diseño de receptores de TVD para Cuba.

open access: yesTelemática, 2015
LACETEL, Instituto de Investigación y Desarrollo de Telecomunicaciones, como parte de la asimilación de la tecnología asociada a la adopción por Cuba del estándar DTMB, ejecuta la verificación para la evaluación de la conformidad de los receptores ...
Rufino Cabrera Álvarez   +3 more
doaj  

A low‐cost protocol for the optical method of vulnerability curves to calculate P50

open access: yesApplications in Plant Sciences, Volume 13, Issue 2, March-April 2025.
Abstract Premise The quantification of plant drought resistance, particularly embolism formation, within and across species, is critical for ecosystem management and agriculture. We developed a cost‐effective protocol to measure the water potential at which 50% of hydraulic conductivity (P50) is lost in stems, using affordable and accessible materials ...
Georgina González‐Rebeles   +3 more
wiley   +1 more source

Pruebas objetivas de calidad de video para televisión de definición estándar.

open access: yesTelemática, 2015
Las técnicas de estimación de calidad de video son de gran utilidad para los operadores de servicio y generadores de contenido, dado que permiten monitorear y evaluar la imagen recibida.
Osmany Yaunner Núñez   +2 more
doaj  

Characterization of the Effective Conductivity in Radio Frequency of Additive Manufacturing Materials

open access: yesRadio Science, Volume 60, Issue 2, February 2025.
Abstract This work presents the characterization of the effective conductivity of additive manufacturing materials used for the fabrication of high‐frequency communication devices. Factors such as material type, porosity, roughness, and oxidation reduce this conductivity, leading to increased insertion loss in the manufactured devices.
Carmen Bachiller   +8 more
wiley   +1 more source

Evolución de las redes hacia la RDSI

open access: yesMemoria Investigaciones en Ingeniería, 2001
Durante más de un siglo la infraestructura principal de telecomunicaciones ha sido el sistema telefónico público de comunicación de circuitos.
Eduardo Carozo Blumsztein
doaj  

CONGRESO INTERNACIONAL DE TELECOMUNICACIONES [PDF]

open access: yesRevista Facultad de Ingeniería - Universidad de Tarapacá, 2005
El Congreso Internacional de Telecomunicaciones, SENACITEL, se ha realizado cada dos anos desde 1984, habiendose consolidado como un importante espacio del sector de las telecomunicaciones, con la participacion de ingenieros, academicos y especialistas de universidades nacionales y extranjeras, ademas del sector empresarial y de gobierno.
Rey Clericus, Pedro   +1 more
openaire   +2 more sources

Experimental demonstrations of high‐accuracy 3D/2D indoor visible light positioning using imaging multiple‐input multiple‐output receivers and artificial neural networks

open access: yesIET Optoelectronics, Volume 19, Issue 1, January/December 2025.
The paper proposes and demonstrates a high‐precision indoor 2D and 3D visible light positioning system using an imaging MIMO configuration with supervised ANN, achieving positioning accuracies of 3.7 mm (2D) and 51 mm (3D) experimentally. A simulation model verifies the results and optimises the system, improving accuracies to 2 mm (2D) and 14.7 mm (3D)
Juan. A. Apolo   +5 more
wiley   +1 more source

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