Artículo en revista de investigación: Envíos recientes
Mostrando ítems 561-580 de 823
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Montaje de un Banco de Pruebas para Medir Esfuerzos de Contacto y Vibración en Pares de Engranes
(2019-09)En esta investigación se propone el montaje de un banco de pruebas para la medición experimental de esfuerzos y vibraciones en pares de engranes en contacto. La medición de los esfuerzos de contacto se realizó usando ... -
Optimización del diseño de los engranes del reductor de un vehículo todo terreno
(2019-12)En la actualidad existe la tendencia de diseñar componentes mecánicos capaces de soportar elevadas cargas de operación y que al mismo tiempo sean lo más ligeros posibles. Ambas condiciones son opuestas ya que, al aligerar ... -
Effect of extrapallial protein of Mytilus californianus on the process of in vitro biomineralization of chitosan scaffolds
(2019-08)Biomineralization is the process by which diverse organisms have the capacity to create heterogeneous accumulations, derived from organic and inorganic compounds that induce the process of mineral formation. An example of ... -
An empirical study of the effect that a computer graphics course has on visual-spatial abilities
(2019-11-05)Visual-spatial abilities are relevant for performing diverse everyday tasks as well as being successful in multiple fields. This work provides empirical evidence supporting the claim that studying a computer graphics course, ... -
Análisis Metodológico del Esfuerzo Normal sigma(y) Basado en Deflexión Elástica
(2019-11-02)El problema en la determinación de los esfuerzos normales (𝜎𝑥,𝜎𝑦,𝜏𝑥𝑦) en una sección transversal utilizando como base la deflexión elástica, se basa en el hecho de que las metodologías existentes aún presentan ... -
Study of indium tin oxide–MoS2 interface by atom probe tomography
(2019-12)The molybdenum disulfide (MoS2) and indium tin oxide (ITO) interface were studied by atom probe tomography (APT). Raman spectroscopy, scanning electron microscopy, and grazingincidence x-ray diffraction measurements were ... -
Effect of radial clearance and holes as crush initiators on the crashworthiness performance of bi-tubular profiles
(2019-07-01)The use of bi-tubular structures has gained importance in the design of energy absorption systems for protectionof passengers in train collisions. Therefore, it is critical to improve the crashworthiness performance of ... -
Sol-Gel and Electrospinning Synthesis of Lithium Niobate-Silica Nanofibers
(2019-03-26)Lithium niobate-silica fibers were produced by the combination of the sol-gel method and the electrospinning technique. Two sol-gel solutions starting from niobium-lithium ethoxide and tetraethyl orthosilicate were prepared ... -
Dynamics for an electric pendulum
(2019)The Lagrangian formulation is an extensive tool for the analysis of physical systems. In particular, we have applied the Lagrangian procedureto deduce the dynamics and stability for an electric pendulum system. ... -
Aspectos innovadores de realidad virtual y sensores cinéticos para una mejora significativa utilizando el algoritmo de Fireworks para un juego Wii de un deporte colaborativo para una sociedad en una Smart City
(2019-04-25)Cada cierto tiempo se publica un nuevo informe sobre la obesidad infantil. Los malos hábitos alimentarios y la vida cada vez más sedentaria de los niños en una sociedad fronteriza, ha provocado un aumento alarmante en los ... -
Determination of the Chemical Composition of Lithium Niobate Powders
(2019-07-03)Existent methods for determining the composition of lithium niobate single crystals are mainly based on their variations due to changes in their electronic structure, which accounts for the fact that most of these methods ... -
Diseño y Control de Orientación para un Sistema Estabilizador de Tres Grados de Libertad
(2019-11-01)This article presents the design and control of a gimbal robot that moves freely throughout three axes. It shows the development of the robot fully from a geometric representation of the movements that affect the system ... -
Synthesis of nanostructured Nickel compounds on conductive metallicsubstrates
(2019-09-16)Nickel hydroxide, oxide, and sulfide films were synthesized on conductive Ni metallic substrates by solidvapor reactions, calcination and hydrothermal methods. The synthesized films were characterized by XRD, XPS, FE-SEM, ... -
A New Chaotic Oscillator—Properties, Analog Implementation, and Secure Communication Application
(2019-01-23)This paper reports a new 3-dimensional autonomous chaotic system with four nonlinearities. The system is studied with respect to its numerical solutions in phase space, including sensitive dependence on initial conditions, ... -
Lower Secondary School Mathematics Teachers’ TopicSpecific Content Knowledge in the U.S. and Russia
(2019-03-01)This interpretive cross-case study examined the U.S. and Russian teachers’ topic-specific knowledge of lower secondary mathematics. In total, N=16 teachers (8 from the U.S., and 8 from Russia) were selected for the study ... -
Estimación de los Coeficientes de Inercia y de Fricción de un Motor de CD
(2019-11)En este trabajo se presentan algunos modelos de fricción, y se destaca la importancia de los parámetros de fricción viscosa y de Coulomb, los cuales son necesarios para definir los distintos modelos que describen el ... -
Metodologías para diseño de prácticas didácticas en sistemas de control
(2019-11)Dada la evolución de la tecnología de sistemas de control, microelectrónica e informática de los últimos años, el desarrollo de productos es cada día más complejo; esto marca la necesidad de metodologías para el desarrollo ... -
Método Weibull para la Reducción de Tiempo de Prueba Ambiental para Divisor Óptico
(2019-09-30)En este artículo se desarrolla un plan de prueba de vida para un divisor óptico estándar, que permite conocer su tiempo de vida útil y su confiabilidad R(t). De acuerdo con el estándar GR-2866, las variables ambientales a ... -
Impact of Managers and Human Resources on Supply Chain Performance
(2019-03-01)Current competitive, complex, and uncertain markets push companies toward increasing active collaboration on the part of all human resources (HR) involved in the supply chain (SC), because increasing employee participation ... -
Effect of the sintering technique on the ferroelectric and d33 piezoelectric coefficients of Bi0.5(Na0.84K0.16)0.5TiO3 ceramic
(2019-06-13)In the search of lead-free piezoelectric materials, ceramic processing techniques offer potential tools to increase the piezoelectric and ferroelectric properties in addition to new chemical compositions. Powders of pure ...