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Mostrando ítems 34-53 de 823
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A theoretical catalytic mechanism for methanol reforming in CeO2 vs Ni/ CeO2 by energy transition states profiles
(2021-05-25)We present a theoretical study using Halgren-Lipscomb algorithm assisted by DFT + U to determine the catalytic mechanism for hydrogen production by steam reforming of methanol over CeO2 and Ni/CeO2 model catalytic surfaces. ... -
A weighted and distributed algorithm for multi-hop localization
(2019-07-01)Multi-hop wireless sensor networks are widely used in many location-dependent applications. Most applications assume the knowledge of geographic location of sensor nodes; however, in practical scenarios, the high accuracy ... -
A Weighted and Distributed Algorithm for Range-Based Multi-Hop Localization Using a Newton Method
(2021-03-26)Wireless sensor networks are used in many location-dependent applications. The location of sensor nodes is commonly carried out in a distributed way for energy saving and network robustness, where the handling of these ... -
Abiotic Mechanisms Drive Enhanced Evaporative Losses under Urban Oasis Conditions
(2020-11-28)The oasis effect refers to the impact of advected energy on the surface energy balance leading to enhanced evapotranspiration. In this study, we utilize a 1‐yr record of water, energy, and carbon dioxide (CO2) fluxes to ... -
Absorción de energía de estructuras tipo sándwich con base cuadrada sujetas a cargas de compresión
(2018-12-01)En el presente artículo se realiza un análisis numérico de la absorción de energía de perfiles de pared delgada tipo sándwich. Para tal objetivo diversas configuraciones de arreglos cuadrangulares fueron evaluadas empleando ... -
Abstracción y transferencia del concepto de variación en distintos contextos y representaciones
(2022-04-08)La presente investigación tiene como finalidad analizar los niveles de abstracción en el estudiante en situaciones que involucran un pensamiento variacional. Esta investigación se llevó a cabo dentro de la Universidad ... -
Adaptive filter with Riemannian manifold constraint
(2023-06-02)The adaptive filtering theory has been extensively developed, and most of the proposed algorithms work under the assumption of Euclidean space. However, in many applications, the data to be processed comes from a non-linear ... -
Additive manufacturing of green composites: Poly (lactic acid) reinforced with keratin materials obtained from Angora rabbit hair
(2020-11-24)In this research, additive manufacturing of polylactic acid (PLA) reinforced with keratin was studied. Keratin was obtained from Angora rabbit hair and modified with NaOH. Scanning electron microscopy (SEM) images showed ... -
Adhesive and Cohesive Strength in FeB/Fe2B Systems
(2018-05-01)In this work, FeB/Fe2B systems were evaluated by the scratch test. The powder-pack boriding process was performed on the surface of AISI M2 steel. The mechanical parameters, such as yield stress and Young’s modulus of the ... -
Adsorption of serum protein in chitosan-coated and polyethyleneimine-coated magnetite nanoparticles
(2021-11-03)Magnetite (Fe3O4) nanoparticles provide several possibilities for a compelling platform for medical applications due to their magnetic properties. In the same way, functionalization with polymers provides several properties ... -
Advances for the Development of In Vitro Immunosensors for Multiple Sclerosis Diagnosis
(2021-02-25)The diagnosis of diseases based on immunosensors have been objective of research in the last years, providing an improvement for a rapid detection, high sensitivity, precision, accuracy, specificity and resolution. Areas ... -
Aerodynamic Study Of The Rear Spoiler Profile Of A Pick-Up Vehicle
(2023)Aerodynamic drag in pick-up type vehicles is one of the main issues concerning their high fuel consumption. External devices attached to their body frame, such as spoilers, have been developed to reduce the drag. In this ... -
Agotamiento Emocional y su Relación con el Estrés de los Empleados que Laboran en la Industria Manufacturera
(2021-05-16)Hoy en día se ha demostrado que la salud mental tiene un papel sumamente valioso en la vida personal. El entorno laboral no es la excepción, las organizaciones solicitan con mayor frecuencia a personal ... -
AHP Topsis para la selección de proveedores considerando el riesgo asociado a la calidad
(2018-01-15)El problema de selección de proveedores es un problema complejo que integra muchos atributos, muchos de los cuales se encuentran en conflicto o es difícil de medir. En este artículo se presenta una metodología multicriterio ... -
Airy pattern on narrow photoluminescence spectrum of band to band recombination in CdTe:Te thin films
(2018-02-01)Semiconductor CdTe:Te films were deposited by means of rf sputtering on glass substrates. The excess of Te gave place to a high number of Cd-vacancies (VCd) producing p-type CdTe films. The density of carriers produced a ... -
Algoritmo de Demodulación Heterodina en un FPGA para Datos de Interferogramas
(2021-12-27)En este trabajo se propone el diseño de un sistema digital embebido basado en bloques de hardware específico que implementa el algoritmo de demodulación heterodina. Con esto será posible demodular la señal obtenida de ... -
Algoritmo predictivo de la intención de agarres en una prótesis robótica de mano impresa en 3D
(2022-06-27)Las prótesis mioeléctricas son prótesis eléctricas controladas por señales mioeléctricas, poseen un alto grado de rehabilitación a un mayor costo que las prótesis funcionales. La investigación se enfoca en comparar dos ... -
Aluminium oxide formation via atomic layer deposition using a polymer brush mediated selective infiltration approach
(2020-03-06)Area selective deposition (ASD) is an emerging method for the patterning of electronic devices as it can significantly reduce processing steps in the industry. A potential ASD methodology uses infiltration of metal precursors ...