Search results for "error"
showing 10 items of 1643 documents
Les armes contre la terreur
2004
Measurement of the W boson mass
1996
The W boson mass is measured using proton-proton collision data at root s = 13 TeV corresponding to an integrated luminosity of 1.7fb(-1) recorded during 2016 by the LHCb experiment. With a simultaneous fit of the muon q/p(T) distribution of a sample of W ->mu y decays and the phi* distribution of a sample of Z -> mu mu decays the W boson mass is determined to be
Multitemporal and multiresolution leaf area index retrieval for operational local rice crop monitoring
2016
Abstract This paper presents an operational chain for high-resolution leaf area index (LAI) retrieval from multiresolution satellite data specifically developed for Mediterranean rice areas. The proposed methodology is based on the inversion of the PROSAIL radiative transfer model through the state-of-the-art nonlinear Gaussian process regression (GPR) method. Landsat and SPOT5 data were used for multitemporal LAI retrievals at high-resolution. LAI estimates were validated using time series of in situ LAI measurements collected during the rice season in Spain and Italy. Ground LAI data were collected with smartphones using PocketLAI, a specific phone application for LAI estimation. Temporal…
Crop Phenology Retrieval Through Gaussian Process Regression
2021
Monitoring crop phenology significantly assists agricultural managing practices and plays an important role in crop yield predictions. Multi-temporal satellite-based observations allow analyzing vegetation seasonal dynamics over large areas by using vegetation indices or deriving biophysical variables. This study presents a framework for automatic corn phenology characterization based on high spatial and temporal resolution time series. By using the Difference Vegetation Index (DVI) estimated from Sentinel-2 data over Iowa (US), independent phenological models were optimized using Gaussian Processes regression. Their respective performances were assessed based on simulated phenological indi…
Random resampling numerical simulations applied to a SEIR compartmental model
2021
AbstractIn this paper, we apply resampling techniques to a modified compartmental SEIR model which takes into account the existence of undetected infected people in an epidemic. In particular, we implement numerical simulations for the evolution of the first wave of the COVID-19 pandemic in Spain in 2020. We show, by using suitable measures of goodness, that the point estimates obtained by the bootstrap samples improve the ones of the original data. For example, the relative error of detected currently infected people is equal to 0.061 for the initial estimates, while it is reduced to 0.0538 for the mean over all bootstrap estimated series.
Analytical solution of kinematic wave time of concentration for overland flow under green-ampt infiltration
2015
In this paper the well-known kinematic wave equation for computing the time of concentration for impervious surfaces has been extended to the case of pervious hillslopes, accounting for infiltration. An analytical solution for the time of concentration for overland flow on a rectangular plane surface is derived using the kinematic wave equation under the Green-Ampt infiltration. The relative time of concentration is defined as the ratio between the time of concentration of an infiltrating plane and the soil sorptivity time scale, depending on the normalized rainfall intensity and a parameter synthesizing the soil and hillslope characteristics. It is shown that for a more complex case (corre…
SAMSLAM: Simulated Annealing Monocular SLAM
2013
This paper proposes a novel monocular SLAM approach. For a triplet of successive keyframes, the approach inteleaves the registration of the three 3D maps associated to each image pair in the triplet and the refinement of the corresponding poses, by progressively limiting the allowable reprojection error according to a simulated annealing scheme. This approach computes only local overlapping maps of almost constant size, thus avoiding problems of 3D map growth. It does not require global optimization, loop closure and back-correction of the poses.
Justicia restaurativa: su aplicación en los delitos de terrorismo cometidos por el movimiento separatista en Patani, Tailandia
2020
La situación actual de violencia en Patani, Tailandia es tanto una consecuencia de la conflagración histórica como un resultado del fracaso de la Administración pública. Se trata a la vez de un terrorismo separatista y de un conflicto armado. Sin embargo, la solución del problema por la vía política y pacífica parece ser más eficaz que por la represión e imposición estricta de las leyes penales excepcionales. La justicia restaurativa es una herramienta jurídica que puede aplicarse en los casos de terrorismo en Patani para superar el conflicto y lograr la reconciliación social. Además, puede desempeñar un papel importante en el proceso de consolidación de la paz y garantizar una transición f…
La inclusión del terrorismo entre los crímenes internacionales previstos en el Estatuto de la Corte Penal Internacional
2009
La Resolución E, aprobada por la Conferencia Diplomática de Plenipotenciarios de las Naciones Unidas sobre el establecimiento de una Corte Penal Internacional, pospuso para la Conferencia de Revisión la inclusión del terrorismo entre los crímenes internacionales sobre los que tiene competencia la Corte Penal Internacional. En vísperas de la celebración de esta Conferencia de Revisión, la presente monografía contiene un estudio muy completo de los diversos y abundantes instrumentos jurídicos internacionales de lucha contra el terrorismo. A partir de los mismos, se realiza una doble propuesta alternativa de inclusión del terrorismo como crimen internacional en el Estatuto de la Corte Penal In…
Mecanismos internacionales de lucha contra la amenaza terrorista y el yihadismo: los instrumentos de cooperación mundial y el recurso a la jurisdicci…
2021
El fenómeno del terrorismo es tan antiguo como la historia de la humanidad. Sin embargo, los atentados del 11-S plantearon una amenaza de una categoría nueva, que no encajó fácilmente en la definición clásica de terrorismo como acto criminal que se persigue en el marco de un sistema penal interno. Desde entonces, el terrorismo, pero también las medidas adoptadas para enfrentarse a este fenómeno, han ido adquiriendo unos rasgos especiales, alterando buena parte de las reglas básicas del Derecho internacional. Así pues, en los albores del siglo XXI, la irrupción del yihadismo global y la amenaza inherente a éste ocasionaron que los esfuerzos estatales por combatirlo se centraran, primordialme…