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Mostrando ítems 1572-1591 de 1794
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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 ... -
Structural and seismographic characteristics of a sector of the Magdalena Shelf, western margin of Baja California, Mexico, from 2D seismic reflection profiles
(2021-05-25)The Magdalena Shelf, located on the Pacific margin of Baja California, Mexico, is crosscut by the Tosco-Abreojos transform fault system, while the Santa Margarita and San Lazaro faults are sub-parallel and located east ... -
Structural design of biosensor: A review
(2023-10-31)The basic elements in biosensors are the recognition element, reporting element, and measuring device. The typical structure for the biosensing process to occur is the one where the recognition element is first in the ... -
Structural model to assess the relationship of manufacturing practices to delivery time in supply chains
(2018-12-10)he literature suggests that companies today evaluate the delivery time of their products/services to improve their performance in supply chains, which has great importance due to the global competition and trends in the ... -
Structural transformation of vanadate nanotubes into vanadate oxides nanostructures during the dry reforming of methane
(2019-09-20)The metal-containing vanadate nanotubes namely MeVO-NT (Me=Ni, Co or Pt) were in situ transformed into vanadate oxides nanostructures i.e., MeVxOy, during the methane dry reforming. All the experimental observations through ... -
Students’ perspectives on using YouTube as a source of mathematical help: the case of ‘julioprofe’
(2021-10-29)YouTube is one of the most popular sources of mathematical help among young students. In this study we explore the perspectives of engineering students on the use of YouTube videos with the intention of broadening our ... -
Study of CdS/CdS Nanoparticles Thin Films Deposited by Soft Chemistry for Optoelectronic Applications
(2023-05-31)Chalcogenides semiconductors are currently being studied as active layers in the development of electronic devices in the field of applied technology. In the present paper, cadmium sulfide (CdS) thin films containing ... -
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 ...