Search results for "451"
showing 10 items of 28 documents
Effective characterization of the phase and intensity profiles of asymmetrically distorted light pulses in optical fiber systems
2009
International audience; We address the problem of characterization of light pulses that propagate in long-haul high-bit-rate optical communication systems under strongly perturbed conditions. We show that the conventional technique for characterization of the phase and intensity profile of such pulses becomes qualitatively inconsistent when the pulse's profile is asymmetrically distorted with respect to its center of mass. We resolve these inconsistencies by partially reformulating the conventional technique by means of appropriate pulse parameters, which we call upgraded parameters, that allow a fair characterization of the intensity and phase of all types of light pulses, including those …
Dopaminergic-GABAergic interplay and alcohol binge drinking
2019
© 2019 Elsevier Ltd The dopamine D 3 receptor (D 3 R), in the nucleus accumbens (NAc), plays an important role in alcohol reward mechanisms. The major neuronal type within the NAc is the GABAergic medium spiny neuron (MSN), whose activity is regulated by dopaminergic inputs. We previously reported that genetic deletion or pharmacological blockade of D 3 R increases GABA A α6 subunit in the ventral striatum. Here we tested the hypothesis that D 3 R-dependent changes in GABA A α6 subunit in the NAc affect voluntary alcohol intake, by influencing the inhibitory transmission of MSNs. We performed in vivo and ex vivo experiments in D 3 R knockout (D 3 R −/− ) mice and wild type littermates (D 3 …
Emigración internacional valenciana una aproximación sociodemográfica
2016
Transformaciones recientes en el área metropolitana de Valencia. Evolución de los usos del suelo en el municipio de Torrent (1956-2011)
2016
Representaciones sociales e innovación geográfica. El caso de Valencia
2016
Report of the Scientific Committee of the Spanish Agency for Food Safety and Nutrition (AESAN) on the review and update of Dietary Recommendations fo…
2020
*This record is given in both English and Spanish Until now, the established dietary patterns have not demonstrated to achieve the goal of maintaining good health in the general population. In addition to the human health, the current dietary models, called “Sustainable Healthy Diets”, take into account the concept of sustainability in all its aspects. With this goal in mind the World Health Organization (WHO) and the Food and Agriculture Organization of the United Nations (FAO) encourage the development of national food-based dietary recommendations within the specific context of the Sustainable Healthy Diets, taking into account the social, cultural, economic, ecological and environmental…
El uso y consumo de agua en los jardines de las viviendas del litoral de Alicante (España)
2016
El jardín es el elemento que ha adquirido una mayor difusión en los modelos urbanos extensivos en la costa de Alicante (España). En este territorio, a diferencia de otros ámbitos, los jardines unifamiliares se asocian a las urbanizaciones que se han ido configurando desde 1960 a raíz de la expansión del denominado turismo residencial. Los objetivos de esta investigación son identificar las principales características de los jardines unifamiliares y, a partir de ellas, estimar sus necesidades hídricas y determinar el volumen de agua doméstico consumido por el jardín en el hogar. Profundizar en estos factores resulta prioritario para determinar sus repercusiones en la demanda de agua presente…
Summertime columnar content of atmospheric water vapor from ground-based Sun-sky radiometer measurements through a new in situ procedure
2010
[1] A new in situ technique for the retrieval of atmospheric water vapor content (i.e., precipitable water content) from Sun photometric direct solar irradiance measurements, taken at the 940 nm wavelength during clear‐sky conditions, is presented. The procedure is applied to summer data recorded in 2007, 2008, and 2009 with a Sun‐sky radiometer at the San Pietro Capofiume station in the Po valley, Italy. It is a preliminary development of the retrieval procedure providing the columnar water vapor content from measurements performed with PREDE Sun‐sky radiometers. The technique brings improvement and innovation by retrieving the best values of constants (a and b), characterizing atmospheric…
Assessment of Observational Evidence for Direct Convective Hydration of the Lower Stratosphere
2020
In situ and remote sensing observations of water vapor are analyzed to assess the evidence for direct convective hydration of the lower stratosphere. We have examined several hundred balloon-borne and airborne in situ measurements of lower stratospheric humidity in the tropics and northern midlatitudes. We find that the tropical lower stratospheric H2O enhancements above the background occur quite infrequently, and the height of the enhancements is within about 1 km of the cold-point tropopause. Following Schwartz et al. (2013, https://doi.org/10.1002/grl.50421), we examine the anomalously high (above 8 ppmv) water vapor mixing ratios retrieved by the Aura Microwave Limb Sounder (MLS) at 10…