Results 21 to 30 of about 9,769 (191)
Metastability and Avalanches in a Nonequilibrium Ferromagnetic System [PDF]
, 2003 We present preliminary results on the metastable behavior of a nonequilibrium ferromagnetic system. The metastable state mean lifetime is a non-monotonous function of temperature; it shows a maximum at certain non-zero temperature which depends on the ...
Garrido, Pedro L. +2 more
core +1 more source
Water Vapor Sensors Based on the Swelling of Relief Gelatin Gratings
Advances in Materials Science and Engineering, Volume 2015, Issue 1, 2015., 2015 We report on a novel device to measure relative humidity. The sensor is based on surface diffraction gratings made of gelatin. This material swells and shrinks according to the content of water vapor in air. By sending a light beam to the grating, diffracted orders appear.
Sergio Calixto +2 more
wiley +1 more source
Geofísica Internacional, 1972 Se presentan resultados numéricos para la respuesta electromagnética transitoria de un cilindro conductor infinito inmerso en un medio conductor excitado por una fuente lineal infinita. La corriente de entrada es una función de Heaviside de tiempo.
Shri Krishna Singh
doaj +1 more source
Optimización de un dispositivo portátil de detección de nanopartículas
Tecnología en Marcha, 2020 El uso de nanopartículas de plata ha crecido tanto en el ámbito industrial como en el médico. Junto con su uso generalizado, también ha aumentado el interés por comprender sus efectos en el cuerpo humano y el medio ambiente.
Oscar Soto-Rivera
doaj +1 more source
Nonlinear time-domain macromodeling of OTA circuits [PDF]
, 1989 The authors present an accurate nonlinear macromodel of the operational transconductance amplifier (OTA) which is suitable for the transient simulation of OTA-based CMOS analog integrated circuits.
Cruz Moreno, J. +5 more
core +1 more source
International Journal of Antennas and Propagation, Volume 2012, Issue 1, 2012., 2012 The application of a 3D domain decomposition finite‐element and spherical mode expansion for the design of planar ESPAR (electronically steerable passive array radiator) made with probe‐fed circular microstrip patches is presented in this work. A global generalized scattering matrix (GSM) in terms of spherical modes is obtained analytically from the ...
Jesús García +5 more
wiley +1 more source
Maxwell: la teoría electromagnética de la luz
Arbor: Ciencia, Pensamiento y Cultura, 2015 Este artículo pretende explicar en qué contexto se desarrolló la teoría de las ondas electromagnéticas y se identificó la luz como una de ellas. Para ello se hace un análisis de la figura de Maxwell y su tiempo, haciendo especial hincapié en el estado ...
Joel Gabàs Masip
doaj +1 more source
Bandgap and effective mass of epitaxial cadmium oxide [PDF]
, 2008 The bandgap and band-edge effective mass of single crystal cadmium oxide, epitaxially grown by metal-organic vapor-phase epitaxy, are determined from infrared reflectivity, ultraviolet/visible absorption, and Hall effect measurements.
C. F. McConville +7 more
core +2 more sources
Recent Developments of Reflectarray Antennas for Reconfigurable Beams Using Surface‐Mounted RF‐MEMS
International Journal of Antennas and Propagation, Volume 2012, Issue 1, 2012., 2012 Some of the most recent developments in reconfigurable reflectarrays using surface‐mounted RF‐MEMS, which have been developed at the Universidad Politécnica de Madrid, are summarized in this paper. The results include reconfigurable elements based on patches aperture‐coupled to delay lines in two configurations: single elements and gathered elements ...
Eduardo Carrasco +4 more
wiley +1 more source
Gestión de la calidad de la energía eléctrica [PDF]
Revista Científica de Ingeniería Energética, 2018 El trabajo tuvo como objetivo presentar la mejora del sistema de monitoreo y control de la Tecnología de Gestión Total de la Eficiencia Energética, desde la perspectiva del ciclo del conocimiento, con el fin de favorecer la sostenibilidad ...
Mónica Rosario Berenguer Ungaro +4 more
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