Search results for "Simulation."
showing 10 items of 4779 documents
Simulation-based Evacuation Planning for Urban Areas
2021
Evacuation planning is a critical task in disaster management. Especially in situations such as natural disasters or terrorist attacks, large crowds need to move away from danger and reach designated safe zones. For this purpose, various approaches that efficiently compute evacuation plans in urban areas have been proposed. To evaluate the computed plans, previous works employ heuristics that can only roughly estimate the egress time of each plan. Intuitively, a much better approach is to estimate the egress time via simulation. However, designing a simulation model is usually a time-consuming task and, what is more, this model can only be used to evaluate evacuation plans for a specific ar…
Analyzing Large-Scale Crowd Simulations for Building Evacuation
2010
Animated virtual crowds have been used last years for analyzing human factors in scenarios where masses of people gather. A typical example is building evacuation in case of fire. Scalability still remains as an open issue for these multiagent systems applications. In this paper, we use a scalable architecture to simulate a large-scale version of a virtual crowd in a building evacuation. From the social point of view, the results provided by the large-scale version of the crowd add new and crucial information about the agents behavior, emphasizing the need for a small amount of trained leaders in order to save lives. From the system point of view, the results show that the trend of avatars …
Thermal modelling of the ATHENA X-IFU filters
2018
Copyright 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. The X-IFU instrument of the ATHENA mission requires a set of thermal filters to reduce the photon shot noise onto its cryogenic detector and to protect it from molecular contamination. A set of five filters, operating at different nominal temperatures corresponding to the cryostat shield temperatures, is currently baselined. The knowledge of the actual filter temperature profi…
A multiphase multiobjective dynamic genome-scale model shows different redox balancing among yeast species of the saccharomyces genus in fermentation
2021
Yeasts constitute over 1,500 species with great potential for biotechnology. Still, the yeast Saccharomyces cerevisiae dominates industrial applications, and many alternative physiological capabilities of lesser-known yeasts are not being fully exploited. While comparative genomics receives substantial attention, little is known about yeasts’ metabolic specificity in batch cultures. Here, we propose a multiphase multiobjective dynamic genome-scale model of yeast batch cultures that describes the uptake of carbon and nitrogen sources and the production of primary and secondary metabolites. The model integrates a specific metabolic reconstruction, based on the consensus Yeast8, and a kinetic …
Spin Crossover in Fe(II) Molecular Compounds — Mössbauer and µSR Investigations
2002
The compound [Fe(ptz)6](C104)2 (ptz = 1-propyl-tetrazole) displays a complete and gradual spin crossover centred around 125 K as evidenced by magnetic and muon measurements over the temperature range ∼ 4.2–300 K. Although the crystal structure reveals only one crystallographic site, line broadening is observed in the Mossbauer spectra in the vicinity of the spin transition. The muon spin relaxation behaviour of this compound indicates that a structural transformation rather than dynamic processes may account for the observed spectral features. Both the Mossbauer and muon measurements are consistent with a mixture of high and low spin Fe ions in the transition region.
Electron Crystallography on Polymorphs
2006
Structure analysis via electron diffraction in combination with x-ray powder diffraction and simulation methods has been performed on single crystals of small organic molecules which form polymorphs. For two different examples of pigments and non-linear optical active material data collection, cell parameter and space group determination, structure analysis and refinement are discussed.
Déclaration et vérification des créances. La dissimulation frauduleuse d'une dette par le débiteur en redressement judiciaire fonde la responsabilité…
2009
International audience; (Com. 14 oct. 2008, pourvoi n° 07-16.983, arrêt n° 1016 F-D, Sté Le Plantain c/ Sté Rulquin distribution, Gaz. Proc. coll. 2009, n° 1, p. 38, note E. Le Corre-Broly)
Evaluation of the video-simulation as a teaching methodology for the motivational interview in nursing students
2019
espanolIntroduccion: La Video-Simulacion como herramienta pedagogica ha sido escasamente utilizada. Pretendemos evaluar la utilidad y la satisfaccion con la metodologia utilizada en el aprendizaje de entrevista motivacionales mediante VS. Metodologia: Estudio observacional descriptivo transversal (2015) con estudiantes de enfermeria de 4.o curso de la Escuela de Enfermeria La Fe (Valencia, Espana). Se diseno un cuestionario Likert de 12 items. Se midieron las puntuaciones obtenidas, la fiabilidad, y se realizo un analisis factorial. Resultados: La edad media fue 23,6±4,5 anos. Alfa de Cronbach de 0,91. El analisis factorial identifico dos dimensiones que explican el 32,4% y el 32,1% de la v…
Un lugar que no existe: la poesía de Antonio Méndez Rubio (1995-2005)
2014
En el presente trabajo se realiza un análisis de la poética de Antonio Méndez Rubio focalizado en cuatro de sus obras: El fin del mundo (1995), Un lugar que no existe (1998), Trasluz (2002) y Por más señas (2005). Tras un estudio del marco literario y socio-político en el que se ubican, planteamos: primero, una descripción del lenguaje poético que proviene de la aplicación de una metodología, de carácter pragmático, que nos permite analizar la modalización lírica y, con ello, los espacios de indeterminación que presenta; posteriormente, caracterizamos al sujeto lírico marcado por la falta partiendo de la vinculación que se da entre este y el mundo, y finalizando con la aplicación de las teo…
An improved smoothed particle electromagnetics method in 3D time domain simulations
2011
In this paper, an enhanced variant of the meshless smoothed particle electromagnetics (SPEM) method is performed in order to solve PDEs in time domain describing 3D transient electromagnetic phenomena. The method appears to be very efficient in approximating spatial derivatives in the numerical treatment of Maxwell's curl equations. In many cases, very often, accuracy degradation, due to a lack of particle consistency, severely limits the usefulness of this approach. A numerical corrective strategy, which allows to restore the SPEM consistency, without any modification of the smoothing kernel function and its derivatives, is presented. The method allows to restore the same order of consiste…