Search results for "Conducta"
showing 10 items of 611 documents
Spectral Measurement of Photon Emission from Individual Gold Nanoparticles Using Scanning Tunneling Microscopy
2016
The light emission spectra of individual Au nanoparticles induced by a scanning tunneling microscope (STM) have been investigated. Two-dimensional ensembles of tunnel-coupled Au particles were prepared by thermal evaporation onto a native oxide silicon wafer in ultrahigh vacuum (10 – 9 mbar). Our STM measurements show a single peak at photon energy 1.6 eV in the tunneling mode and two peaks at 2.2 eV (connected with the Mie plasmon) and 1.45 eV (a new peak which was not discussed in literature before) in the field emission mode.
Fluoride-Induced Negative Differential Resistance in Nanopores: Experimental and Theoretical Characterization
2021
We describe experimentally and theoretically the fluoride-induced negative differential resistance (NDR) phenomena observed in conical nanopores operating in aqueous electrolyte solutions. The threshold voltage switching occurs around 1 V and leads to sharp current drops in the nA range with a peak-to-valley ratio close to 10. The experimental characterization of the NDR effect with single pore and multipore samples concern different pore radii, charge concentrations, scan rates, salt concentrations, solvents, and cations. The experimental fact that the effective radius of the pore tip zone is of the same order of magnitude as the Debye length for the low salt concentrations used here is su…
Electronic transport in intermediate sized carbon nanotubes
2009
We have studied systematically basic transport properties of multiwalled carbon nanotubes in a relatively unexplored diameter range, corresponding to tubes just slightly larger than single- or double-walled tubes to tubes up to 17 nm in diameter. We find in all the smaller tubes a gap in the transport data which increases with decreasing tube diameter. Within the gap region of several tubes, negative differential resistance was observed at small or moderate biases and at bias values that scaled inversely with the tube diameter. For this latter type of behavior of the conductance, we tentatively propose interlayer resonant tunneling as the cause.
Evaluación del riesgo de reincidencia en menores infractores: herramientas para la mejora de estrategias reeducativas en España
2016
El presente estudio trata de conocer las herramientas que actualmente se utilizan en el ámbito judicial en menores para evaluar el riesgo de reincidencia en España. Para abordar el trabajo se ha realizado una revisión de la literatura existente y se ha llevado a cabo un análisis comparativo de los instrumentos con mayor ascendencia, que permiten identificar dicho riesgo. Tras el análisis, y desde la perspectiva del Trabajo Social, se destaca la herramienta SAVRY puesto que es una herramienta que abarca una gran cantidad de factores y permite el desarrollo de actuaciones efectivas potenciando conductas prosociales que reduzcan el riesgo de de- lincuencia futura. El conocimiento de estas herr…
Investigación en la escuela
2007
Resumen tomado de la publicación Se pretende dar respuesta al llamamiento que Naciones Unidas hace a los educadores de todas las áreas y niveles, para que contribuyan a formar una ciudadanía preparada para participar en la construcción de un futuro sostenible. Se presentan las estrategias diseñadas y aplicadas en las clases para potenciar el desarrollo sostenible propiciado por Naciones Unidas. Con ellas se intenta favorecer un planteamiento global de los problemas a los que se enfrenta hoy la humanidad. Se persigue romper con los tratamientos puntuales e inconexos, haciendo posible una correcta comprensión de la situación y la participación en la adopción de medidas adecuadas. Andalucía Ma…
Plant Response to Saline-Water Irrigation in a Sicilian Vineyard
2012
This chapter presents results of a 3-year field investigation in a vineyard located in Sicily (Mazara del Vallo, Trapani) within the framework of the Project “Evolution of cropping systems as affected by climate change” (CLIMESCO). Soil-plant responses to two saline irrigation waters were determined by measuring soil hydrological characteristics, soil salinity, crop transpiration and stomatal conductance in field plots of a Sicilian vineyard. The results proved that crop transpiration (T r) and stomatal conductance (G s) were significantly affected by soil salinity conditions, expressed by electrical conductivity of soil saturation extract (ECe). Significant reductions in T r and G s were f…
Cystic Fibrosis Transmembrane Conductance Regulator Interacts with Multiple Immunoglobulin Domains of Filamin A
2010
Mutations of the chloride channel cystic fibrosis transmembrane conductance regulator (CFTR) that impair its apical localization and function cause cystic fibrosis. A previous report has shown that filamin A (FLNa), an actin-cross-linking and -scaffolding protein, interacts directly with the cytoplasmic N terminus of CFTR and that this interaction is necessary for stability and confinement of the channel to apical membranes. Here, we report that the CFTR N terminus has sequence similarity to known FLNa-binding partner-binding sites. FLNa has 24 Ig (IgFLNa) repeats, and a CFTR peptide pulled down repeats 9, 12, 17, 19, 21, and 23, which share sequence similarity yet differ from the other FLN…
<title>Scanning probe microscopy of nanocrystalline iridium oxide thin films</title>
2003
Structural investigations of nanocrystalline iridium oxide thin films, prepared by dc magnetron sputtering technique were performed by scanning probe microscopy (SPM). SPM studies, using both atomic force microscopy (AFM) and scanning tunnelling microscopy (STM), indicate that the thin films are composed of grains with a size of about 20-50 nm. Fine crystallinity and small RMS microroughness of the films, being well below 2 nm, make iridium oxide thin films promising candidates for nanolithographic applications. The possibility to perform nanolithograhpic processes at a scale of less than 150 nm was successfully examined in AFM and STM modes.© (2003) COPYRIGHT SPIE--The International Societ…
Genetic and psychosocial stressors have independent effects on the level of subclinical psychosis: findings from the multinational EU-GEI study.
2022
the Spanish Ministry of Science and Innovation. Instituto de Salud Carlos III (SAM16PE07CP1, PI16/02012, PI19/024), co-financed by ERDF Funds from the European Commission, ‘A way of making Europe’, CIBERSAM. Madrid Regional Government (B2017/BMD-3740 AGES-CM-2), European Union Structural Funds. European Union Seventh Framework Program under grant agreements FP7-4-HEALTH-2009-2.2.1-2-241909 (Project EU-GEI) and FP7-HEALTH-2013-2.2.1-2-603196 (Project PSYSCAN); and European Union H2020 Program under the Innovative Medicines Initiative 2 Joint Undertaking (grant agreement No 115916, Project PRISM, and grant agreement No 777394, Project AIMS-2-TRIALS) (...)
El seguimiento de un vehículo en el desplazamiento en línea: caracterización psicofisiológica y conductual de dos formas básicas de conducción
2015
Esta Tesis Doctoral parte de una observación: el coste personal, material, económico y medioambiental que originan las congestiones en el tráfico. (Levinson et al., 1998; UNHSP, 2007). Nos hacemos así eco de una constatación básica a juicio de los expertos: “La mayor parte de la conducción se da bajo el constreñimiento de un vehículo que precede al nuestro” (Evans, 1991; p. 114). Hace más de medio siglo que la ingeniería del tráfico trata de comprender el desplazamiento conjunto de los conductores en el movimiento en línea (Brackstone & McDonald, 1999). Este objetivo parte de un implícito importante: los conductores tienen un modo específico de desplazarse cuando avanzan colectivamente en u…