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Mostrando ítems 1565-1584 de 1794
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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 ... -
Soluciones axial simétricas estáticas de sistemas binarios en 5D
(2021-07-05)Usando una solución esta ́tica axial simétrica que describe un sistema binario de agujeros negros idénticos en un espacio-tiempo en cuatro dimensiones (4D), construimos y estudiamos a través de la estructura de barras, una ... -
Soluciones exactas de EDPs lineales de segundo orden mediante álgebras
(2021-06-15)Se usa la diferenciabilidad en álgebras pre-torcida (pre-twisted differentiability on algebras) para construir soluciones de EDPs de segundo orden de dos variables independientes principalmente. Se construyen familias de ... -
Solución de un cubo Rubik a través de un robot Lego EV3
(Academia Journals, 2020-05-15)El cubo de Rubik ha sido uno de los mayores juegos de destreza creados en toda la historia, en el cual existen 43 trillones de posibles combinaciones, pero solo 1 es la correcta. Lo anterior ha llevado a que miles de ... -
Some aspects of Zariski topology for multiplication modules and their attached frames and quantales
(2019-09-01)For a multiplication R-module M we consider the Zariski topology in the set Spec (M) of prime submodules of M. We investigate the relationship between the algebraic properties of the submodules of M and the topological ... -
Sotol: identificación de áreas de oportunidad
(Universidad Autónoma de Ciudad Juárez, 2022-05-30) -
Spin glass behavior in La0.7Ca0.23Sr0.07MnO3 nanofibers obtained by electrospinning
(2019-01-02)This work contributes to the development of new nanostructured mixed valence manganites and to explore and optimize their magnetic properties at 1-D level. Nanofibers of La0.7Ca0.23Sr0.07MnO3 manganite were fabricated ... -
Sputtering power e ects on the electrochromic properties of NiO lms
(2021-02-13)The effect of sputtering power (=60 W–180 W) on the electrochromic properties of nickel oxide films deposited on ITO-coated glass substrates by the radio frequency magnetron sputtering technique was investigated. Crystalline ... -
Starch Modified With Chitosan and Reinforced WithFeather Keratin Materials Produced by ExtrusionProcess: An Alternative to Starch Polymers
(2018-11-01)Starch (potato), chitosan, and feather keratin are used for processing biodegradable films produced by extrusion. The morphology of the films is examined with a scanning electron microscope and showed the excellent dispersion ... -
State of art of lower limb exoskeleton for assistance (Estado de arte de exoesqueleto para asistencia de extremidades inferiores)
(Universidad Tecnológica de Ciudad Juárez, 2018-05-01) -
State-feedback linearization using a robust differentiator combined with SOSM super-twisting for controlling the induction motor velocity
(IEEE, 2018-12-31)In this paper, the authors propose a robust controller by applying state-feedback linearization technique combined with the super-twisting algorithm as control law, which is applied to control the velocity of the squirrel-cage ... -
Static and spin electric polarizabilities of the neutron in lattice QCD
(ProQuest, 2018-03-01) -
Statistical inference of multivariable modal stability margins of time delay perturbated power systems
(2020-01-07)This paper proposes a modal statistical inference algorithm to define multivariable operational stability limits of time-delay perturbed dynamic systems by employing remote sensor signals. Our proposal overcomes the drawbacks ... -
Strategies Employed in the Reconfiguration of Healthcare Facilities During COVID-19 in OECD Countries
(Springer, 2022-10-24)This research summarizes the strategies employed in reconfiguring healthcare facilities in OECD member countries to care for patients with COVID- 19. The findings were organized by highlighting each country’s hospital ... -
Stress concentration reduction in an axially loaded rectangular bar with an elliptical hole
(2023-03-17)Two-dimensional finite element analysis was used for stress concentration factors estimation in a wide range of bar-ellipse height and height-width elliptical hole ratios in a tensile bar. Least squares ... -
Stress-Based Weibull Method to Select a Ball Bearing and Determine Its Actual Reliability
(2020-11-16)Since the designed bearing’s reliability of 90% was determined in a lab environment, it does not represent the actual used environment. In this paper, a new methodology to determine the actual reliability that corresponds ... -
Stress-strength Weibull analysis with different shape parameter B and probabilistic safety factor
(2020-11-05)Since products are subjected to a random variable stress-strength, their reliability must be determined using the stress-strength analysis. Unfortunately, when both, stress and strength, follow a Weibull distribution with ... -
Structural and magnetic behavior of oxidized and reduced fe doped LiNbO3 powders
(2018-02-26)Changes in structural and magnetic properties have been systematically induced in lithium niobate (LiNbO 3) powders, Fe-doped with different concentrations and thermally treated in oxidized and reduced states. A rather ...