Search results for "REM"
showing 10 items of 11264 documents
Studying the relationships between hourly precipitation extremes and dewpoint temperature in Sicily.
2019
According to the well-known Clausius-Clapeyron relation, the maximum moisture content of the atmosphere increases with approximately 7% per degree temperature raise (CC-scaling rate). Under the hypothesis that relative humidity does not change, an increase in the water vapor should occur at the same rate. For this reason we could expect for the coming years an increase in the intensity of extreme precipitation as a consequence of the global climate warming. Trend on precipitation extremes and possible links to changes in atmospheric temperature and moisture are investigated in different parts of the world, and a number of observational studies has exhibited scaling rates that are either hig…
Determinants of the interannual relationships between remote sensed photosynthetic activity and rainfall in tropical Africa
2007
International audience; The response of photosynthetic activity to interannual rainfall variations in Africa South of the Sahara is examined using 20 years (1981-2000) of Normalised Difference Vegetation Index (NDVI) AVHRR data. Linear correlations and regressions were computed between annual NDVI and annual rainfall at a 0.5° latitude/longitude resolution, based on two gridded precipitation datasets (Climate Prediction Center Merged Analysis of Precipitation [CMAP] and Climatic Research Unit [CRU]). The spatial patterns were then examined to detect how they relate to the mean annual rainfall amounts, land-cover types as from the Global Land Cover 2000 data set, soil properties and soil typ…
Wireless Strain Gauge Network : Best-Hall Measurement Case
2014
Wireless sensor networks can be used to perform structural monitoring. Strain gauges, which can be glued on or integrated to the observed material, are the most common nondestructive sensing elements for measuring surface strain. Wireless strain gauge measurement system makes strain measurements more flexible while opening new targets of application in addition to those that traditional wired strain measuring systems can offer. We have implemented a long term strain measurement in a PVC-covered hall using wireless sensor network. In this paper we evaluate the functionality and suitability of the developed wireless system for this kind of monitoring. The paper discusses the experiences gaine…
Global Estimation of Biophysical Variables from Google Earth Engine Platform
2018
This paper proposes a processing chain for the derivation of global Leaf Area Index (LAI), Fraction of Absorbed Photosynthetically Active Radiation (FAPAR), Fraction Vegetation Cover (FVC), and Canopy water content (CWC) maps from 15-years of MODIS data exploiting the capabilities of the Google Earth Engine (GEE) cloud platform. The retrieval chain is based on a hybrid method inverting the PROSAIL radiative transfer model (RTM) with Random forests (RF) regression. A major feature of this work is the implementation of a retrieval chain exploiting the GEE capabilities using global and climate data records (CDR) of both MODIS surface reflectance and LAI/FAPAR datasets allowing the global estim…
Hard Two-Photon Contribution to Elastic Lepton-Proton Scattering Determined by the OLYMPUS Experiment
2017
The OLYMPUS collaboration reports on a precision measurement of the positron-proton to electron-proton elastic cross section ratio, $R_{2\gamma}$, a direct measure of the contribution of hard two-photon exchange to the elastic cross section. In the OLYMPUS measurement, 2.01~GeV electron and positron beams were directed through a hydrogen gas target internal to the DORIS storage ring at DESY. A toroidal magnetic spectrometer instrumented with drift chambers and time-of-flight scintillators detected elastically scattered leptons in coincidence with recoiling protons over a scattering angle range of $\approx 20\degree$ to $80\degree$. The relative luminosity between the two beam species was mo…
Repeated kidney re-transplantation—the Eurotransplant experience: a retrospective multicenter outcome analysis
2020
Transplant international (2020). doi:10.1111/tri.13569
Novel molecules for the readthrough of PTCs in biological model systems and in cystic fibrosis cells
2016
Análisis y Evaluación del tratamiento de la isquemia crítica de miembros inferiores no revascularizable mediante trasplante autólogo de progenitores …
2015
La enfermedad arterial periférica constituye una de las enfermedades con mayor impacto en la calidad de vida de los pacientes. La isquemia crítica de miembros inferiores es el estadio terminal de la enfermedad arterial periférica y presenta elevadas tasas de amputación de la extremidad a pesar del correcto tratamiento. En los últimos años, diversas publicaciones han mostrado efectos terapéuticos con el uso de células pluripotenciales obtenidas desde médula ósea en el tratamiento de la isquemia crítica sin opciones de revascularización, en lo que se ha llamado Angiogénesis Terapéutica. El objetivo de este estudio fue demostrar que, mediante el trasplante autólogo de progenitores hematopoyéti…
Combustible vegetal y etnografía: estudio de un horno de pan en Ghuala (Argelia)
2013
[ES] La maderas y los carbones constituyen un patrimonio biológico y cultural susceptible de ser analizado, tanto en contextos arqueológicos como etnográficos. La antracología, por medio del muestreo del carbón y su identificación botánica, aporta información sobre la interacción constante de los grupos humanos con la vegetación. Se presenta en este artículo un estudio etnográfico realizado en 2012 en Ghuala (Argelia), a través del análisis del combustible leñoso utilizado en un horno de pan tradicional de uso familiar, con el objetivo de arrojar mayor luz al debate existente en torno a las estrategias de gestión del combustible leñoso en las sociedades humanas del pasado. [EN] Wood and cha…
Métodos estadísticos y computacionales en el estudio de tiempos de respuesta de reconocimiento de palabras
2021
La siguiente tesis doctoral se presenta como un trabajo de investigación relacionado con el análisis estadístico de tiempos de respuesta. El objeto de estudio de este trabajo pretende aportar algo de información sobre el tratamiento de outliers incorporando la alternativa de transformación 1 t2 . Para el análisis de fiabilidad de las transformaciones de datos outliers se suele utilizar el modelo lineal t-test que busca un patrón lineal en el conjunto unificado de datos; como novedad en el presente trabajo, se usará un modelo generalizado lineal mixto que pretende mejorar el modelo lineal primigenio diferenciando los datos en su origen (sujeto e item). En todos los casos los tiempos de respu…