Literatura académica sobre el tema "Capteur de particules"
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Artículos de revistas sobre el tema "Capteur de particules"
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Thibaudon, M., G. Oliver, J. Nagy y S. Kawashima. "Mise en œuvre d’un capteur on line de particules pour l’information des allergiques : étude préliminaire". Revue Française d'Allergologie 54, n.º 3 (abril de 2014): 236. http://dx.doi.org/10.1016/j.reval.2014.02.037.
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Ndaw, Sophie, Daniele Jargot, Guillaume Antoine, Flavien Denis, Sandrine Melin y Alain Robert. "Investigating Multi-Mycotoxin Exposure in Occupational Settings: A Biomonitoring and Airborne Measurement Approach". Toxins 13, n.º 1 (13 de enero de 2021): 54. http://dx.doi.org/10.3390/toxins13010054.
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Investigating workplace exposure to mycotoxins is of the utmost importance in supporting the implementation of preventive measures for workers. The aim of this study was to provide tools for measuring mycotoxins in urine and airborne samples. A multi-class mycotoxin method was developed in urine for the determination of aflatoxin B1, aflatoxin M1, ochratoxin A, ochratoxin α, deoxynivalenol, zearalenone, α-zearalenol, β-zearalenol, fumonisin B1, HT2-toxin and T2-toxin. Analysis was based on liquid chromatography–high resolution mass spectrometry. Sample pre-treatments included enzymatic digestion and an online or offline sample clean-up step. The method was validated according to the European Medicines Agency guidance procedures. In order to estimate external exposure, air samples collected with a CIP 10 (Capteur Individuel de Particules 10) personal dust sampler were analyzed for the quantification of up to ten mycotoxins, including aflatoxins, ochratoxin A, deoxynivalenol, zearalenone, fumonisin B1 and HT-2 toxin and T-2 toxin. The method was validated according to standards for workplace exposure to chemical and biological agents EN 482. Both methods, biomonitoring and airborne mycotoxin measurement, showed good analytical performances. They were successfully applied in a small pilot study to assess mycotoxin contamination in workers during cleaning of a grain elevator. We demonstrated that this approach was suitable for investigating occupational exposure to mycotoxins.
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Ecord, K. y L. A. Glasgow. "Vortex-Enhanced Capture of Airborne Particulates". Environmental Technology 23, n.º 2 (febrero de 2002): 217–26. http://dx.doi.org/10.1080/09593332508618429.
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LeMieux, Julianna. "Multiomics Technologies Capture More Particulars, Reveal More Grandeur". Genetic Engineering & Biotechnology News 43, n.º 6 (1 de junio de 2023): 34–36. http://dx.doi.org/10.1089/gen.43.06.13.
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Parker, K. R. "Effective capture of respirable-sized particulates using electrostatic precipitator technology". Engineering Science & Education Journal 9, n.º 1 (1 de febrero de 2000): 33–40. http://dx.doi.org/10.1049/esej:20000108.
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Więcek-Durańska, Anna. "Juvenile perpetrators of rape with particular cruelty". Probacja 2 (30 de junio de 2024): 171–93. http://dx.doi.org/10.5604/01.3001.0054.6063.
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According to statistical data in Poland, sexual acts of minors account for about 3% of all criminal acts committed by minors and nearly 20% of all acts from the catalogue of crimes against sexual freedom and morality. The main objective of the study was to attempt to develop and present characteristics of minors who commit rape with particular cruelty. Taking into account the way the perpetrators act, the motivational background and the circumstances of the crime. In particular, attention was paid to specific individual and family characteristics. Because it is not clear whether juvenile sex offenders are different from non-sex offenders. The aim of this article is an attempt to capture individual, family and environmental differences. The study was also intended to provide information about who the victims are. The study was conducted on the basis of empirical material from court cases in which the basis of liability was Article 1974 of the Penal Code, and the perpetrators or accomplices of the acts were minors who at the time of the act were over 15 years of age but under 17 years of age. The research material consisted of court case files that had been finally completed, including forensic psychological opinions prepared by court experts. Cases from 2015-2020 were analysed. The obtained results allowed to capture some specific features of families in which minors were brought up and the characteristics of juvenile sex offenders themselves. This article raises the difficult issue of juvenile responsibility for sexual crimes, indicates areas in which it is necessary to regulate interactions and areas of possible preventive impacts.
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Harris, James. "The monitoring of exhaust particulate from a marine diesel engine". Proceedings of the International Conference on Condition Monitoring and Asset Management 2024, n.º 1 (1 de junio de 2024): 10–19. https://doi.org/10.1784/cm2024.3b4.
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Defence Science and Technology Group (DSTG) Australia constructed and trialled a demonstrator to capture exhaust gas particulates from a large marine diesel engine as part of a novel mechanical condition monitoring system. Particulate capture occurred on borosilicate glass patches situated within the exhaust system of a refurbished engine undergoing run-in trials. Analysis of captured nano through to large scale particulates showed wear debris from particular engine components, and the surrounding soot groundmass contained elements from fuel and lubricating oil. Changes in the material captured over the trial duration indicated the ability to monitor changes in engine condition. Overall this trial demonstrated exhaust particulate capture as a method of monitoring the condition and combustion performance for marine diesel engines.
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Puskas, Daniel. "Les capteurs de rêves". Filigrane 17, n.º 2 (20 de noviembre de 2008): 110–21. http://dx.doi.org/10.7202/019422ar.
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Résumé L’auteur témoigne de son parcours comme psychoéducateur auprès de jeunes en difficulté, métier qu’il exerce en parallèle à celui de psychanalyste, et qui lui a permis de se familiariser avec des modes de fonctionnements psychiques particuliers. Ses deux métiers se nourrissent l’un de l’autre.
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Shah, Dhawal, Ablay Saparov, Ulan Mansurov y Mehdi Amouei Torkmahalleh. "Molecular Dynamics Simulations To Capture Nucleation and Growth of Particulates in Ethanolamine-Based Post-Combustion CO2 Capture Columns". Industrial & Engineering Chemistry Research 59, n.º 7 (28 de enero de 2020): 3213–20. http://dx.doi.org/10.1021/acs.iecr.9b06845.
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Rosenhagen, Nicole. "Capture myopathy". Wildlife Rehabilitation Bulletin 41, n.º 2 (15 de diciembre de 2023): 32–35. http://dx.doi.org/10.53607/wrb.v41.263.
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Capture myopathy is a condition that manifests after prolonged pursuit, entrapment, restraint, live-stranding and/or transport. Its effects are wide-ranging and often life-threatening. All wild animals are susceptible to this condition, though particular species seem to be predisposed. A diagnosis of capture myopathy revolves around the animal’s natural and individual history as well as any clinical signs, although, in many cases, a definitive diagnosis cannot be made or is only determined post-mortem. Successful management often relies on aggressive fluid support, pain management and physical therapy.
Tesis sobre el tema "Capteur de particules"
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Grall, Simon. "Microcapteurs de particules à base de micropoutres pour le contrôle de la qualité de l'air dans un véhicule automobile". Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0038/document.
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Les particules fines ont un impact réel sur la qualité de vie et la santé de millions de personnes dans les grandes zones urbaines, notamment en Asie. Pour les détecter et quantifier leur concentration, les capteurs de particules optiques sont les plus couramment étudiés, mais restent relativement chers et volumineux. Les transducteurs MEMS micropoutres sont largement utilisés pour des applications gravimétriques, pour la détection de particules ou de gaz, ce qui requiert des sensibilités massiques (Sm) élevées et des limites de détection (LOD) basses. Pour cela les micropoutres les plus adaptées sont celles ayant des fréquences de résonance (f0) et facteurs de qualité (Q) élevés, avec de faibles bruits de mesure et des masses faibles. Les micropoutres silicium sont couramment utilisées en tant que capteurs gravimétriques et sont de sérieux candidats pour répondre aux caractéristiques souhaitées. Cependant, la sérigraphie a le potentiel pour une fabrication moins chère, plus rapide et aussi à grande échelle. Pour ces micropoutres, l'actionnement et la lecture de f0 sont possibles par effet piézoélectrique. Bien qu'il existe des solutions inorganiques prometteuses sans plomb, les céramiques de titano-zirconate de plomb (PZT) possèdent encore les meilleures propriétés parmi les matériaux piézoélectriques. Des micropoutres fabriquées en technologie hybride couches épaisses sérigraphiées, à actionnement et lecture piézoélectriques intégrés, libérées à l'aide d'une couche sacrificielle polyester et avec co-cuisson de toutes les couches pour leurs libérations sont présentées ici. Différentes géométries ont été testées de 1 mm à 2 mm de large et de 1 mm à 8 mm de long, pour une épaisseur d'environ 100 μm. Une masse volumique ρ PZT = 7200 kg/m³ a été obtenue (≈ 93%ρ PZT massif). Enfin, avec une micropoutre 1×2×0,1 mm³, une sensibilité Sm ≈ 85 Hz/μm et une LOD de 70 ng ont été trouvées, permettant des applications en détection de particulesFine particulate matters (PM) have a real impact on the quality of life and health of millions of people in large urban areas, especially in Asia. In order to detect them and quantify their concentration, optical PM sensors are the most widely studied, but remain relatively expensive and bulky. MEMS microcantilever transducers are widely used for gravimetric applications, for PM or gas detection, which requires high mass sensitivities (Sm) and low limits of detection (LOD). A solution is to focus on microcantilevers with high resonance frequencies (f0) and quality factors (Q), low measurement noise and low masses. Silicon microcantilevers are commonly used as gravimetric sensors and are serious candidates to meet the desired characteristics. However, screen printing has the potential for cheaper, faster and large scale manufacturing. Such microcantilevers can be actuated and f0 read-out using the piezoelectric effect. Although promising lead-free inorganic solutions exist, titanium lead zirconate (PZT) ceramics still have the best properties among piezoelectric materials. Screen-printed microcantilevers manufactured in hybrid thick-film technology, with integrated piezoelectric actuation and read-out, released using a polyester sacrificial layer and with co-firing of all the layers are presented here. Different geometries were tested from 1 mm to 2 mm wide and from 1 mm to 8 mm long, for a thickness of about 100 μm. A density ρ PZT = 7200 kg/m³ (≈ 93%ρ PZT bulk) was obtained. With a 1×2×0.1 mm³ microcantilever, a sensitivity Sm ≈ 85 Hz/μm and a LOD of 70 ng were found, compatible with applications in PM mass detection
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Grondin, Didier. "Développement d'un capteur de suies pour application automobile - Etude des paramètres clés affectant sa réponse". Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEM012/document.
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Le transport routier est responsable d’une part des émissions de particules fines, notamment dans les grandes agglomérations. Celles-ci ayant des répercussions graves sur la santé humaine et l’environnement, des normes d’émissions des véhicules de plus en plus strictes sont mises en place. Des limites en nombre de particules sont imposées et une obligation de connaitre l’état de santé des organes de post-traitement des gaz d’échappement est également entrée en vigueur (On-Board Diagnostic : OBD).Les capteurs résistifs ont montré de bons résultats pour la mesure de la concentration massique des particules et ont l’avantage d’être simples à mettre en oeuvre, robustes et peu onéreux. Le principe de fonctionnement du capteur est basé sur la mesure de la conductance entre des électrodes de platine. Celle-ci augmente avec le dépôt de suies.L’objectif de ce travail de thèse est de parvenir à déterminer les paramètres clés qui affectent la réponse du capteur. Trois flux de suies présentant des distributions en taille différentes ont été sélectionnés et caractérisés. Un quatrième flux de suies a permis d’appréhender l’impact d’une concentration massique inférieure. La réponse du capteur à ces différents flux de suies a été étudiée. Nous avons montré que la sensibilité et le temps de réponse du capteur sont optimaux pour une tension de polarisation donnée entre les deux électrodes dont la valeur dépend de la distribution en taille des suies. Ce phénomène a été expliqué par les propriétés électriques différentes des suies et modélisé par un équilibre entre accumulation et combustion par effet Joule des suies déposées permettant de simuler la réponse temporelle du capteurRoad transport contributes to a part of the particulate matter emissions, especially in big cities. Due to the negative effect of these pollutants on the human health and environment, more and more stringent emission standards for automotive are applied. These emissions are now limited in number of particles per kilometer and the vehicle need to indicate when there is some failure of the systems of depollution (OBD: On-Board diagnostic).Resistive sensors have shown good results to measure soot particles mass concentration. They have advantage of being a simple and robust technology that can be easily manufactured at a cheap price. The sensor principle consists of conductance measurement between two platinum electrodes. Conductance increases with soot deposition. This work aims to define the key parameters that affect the sensors response. Three particles flow with different particles size distributions (centered at 90, 70 and 50 nm) were used and characterized. A fourth flow was used to see the impact of a lower mass concentration. The sensor response exposed to these different flows was studied. It was shown that the sensor sensibility and response times are optimal for a given polarization voltage between the electrodes whose value depends on the size distribution. This phenomenon was explained by the different electrical properties of the soot particles and modeled by equilibrium of soot accumulation and their combustion by Joule heating that permitting to simulate the sensor temporal response
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Despeisse, Matthieu. "Etude et caractérisation d'un capteur en silicium amorphe hydrogéné déposé sur circuit intégré pour la détection de particules et de rayonnements". Lyon, INSA, 2006. http://theses.insa-lyon.fr/publication/2006ISAL0017/these.pdf.
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Résumé étendu en françaisPour les futures expériences de physique des hautes énergies au laboratoire européen de physique des particules (CERN), des technologies de détection alternatives aux détecteurs silicium actuels seront nécessaires. Le travail effectué dans cette thèse présente les performances et les limitations d'une nouvelle technologie de détection. Celle-ci est basée sur la déposition d'un capteur en silicium amorphe hydrogéné directement sur circuit intégré, présentant ainsi un haut degré d'intégration. Le travail présenté comprend l'optimisation et le développement de circuits intégrés pour la caractérisation de cette technologie dite " Thin-Film on ASIC ". L'interface entre le capteur déposé et le circuit intégré a été caractérisée pour comprendre en détail la méthode de segmentation du détecteur. L'induction d'un signal par le passage d'une particule chargée ou d'un rayonnement au travers du capteur a été démontrée et étudiée. La vitesse et l'amplitude du signal induit, ainsi que la résistance à de hauts niveaux de radiations ont été particulièrement appréciées. Le travail présenté démontre la faisabilité du concept de détection proposé et d'intéressantes propriétés de cette technologie pour diverses applications de détection, mais révèlent cependant différentes limitations pour d'éventuelles applications pour la physique des particules
Next generation experiments at the European laboratory of particle physics (CERN) require particle detector alternatives to silicon detectors. This thesis presents such a novel detector technology, which is based on the deposition of a hydrogenated amorphous silicon sensor on top of an integrated circuit. Performance and limitations of this technology have been assessed for the first time in this thesis in the context of particle detectors. Specific integrated circuits have been designed and the detector segmentation, the interface sensor – chip and the sensor leakage current have been studied in details. The signal induced by the track of an ionizing particle in the sensor has been characterized and results on the signal speed, amplitude and on the sensor resistance to radiation are presented. The results are promising regarding the use of this novel technology for radiation detection, though limitations have been shown for particle physics application
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Despeisse, Matthieu Gontrand Christian. "Etude et caractérisation d'un capteur en silicium amorphe hydrogéné déposé sur circuit intégré pour la détection de particules et de rayonnements". Villeurbanne : Doc'INSA, 2006. http://docinsa.insa-lyon.fr/these/pont.php?id=despeisse.
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Roosz, Nicolas. "Elaboration de particules composites silice-polyaniline en vue d'applications environnementales". Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD083/document.
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Les matériaux hybrides organique/inorganiques ont reçu beaucoup d'attention ces dernières années dans les études des nanomatériaux. En effet, ils possèdent des propriétés physiques et chimiques uniques grâce aux effets synergiques de chaque composant. En particulier, les nanoparticules de silice (SiO2) présentent des caractéristiques intéressantes, comme une bonne stabilité chimique et thermique. Elles peuvent être préparées de différentes tailles et peuvent aussi être facilement fonctionnalisées. Les polymères conducteurs intrinsèques comme le polythiophène et la polyaniline (PANI) peuvent exister sous différents états d'oxydation et donc répondre à des stimuli extérieurs en changeant une de leur caractéristique (couleur, conductivité, etc…). La PANI est un polymère non-toxique, thermiquement stable et peu coûteux avec une conductivité relativement élevée qui a été utilisée comme film antistatique, matériel d'électrode, inhibiteur de corrosion et comme surface sensible de capteur. Depuis la découverte des polymères conducteurs en 1977, plusieurs travaux ont été effectués sur la préparation, la caractérisation et les applications de films polymériques construits à la surface de matériaux comme la silice. Parmi les différents types de composites existants, les particules de type cœur@coquille composées d’un cœur inorganique et d’une couronne de polymère sont les plus prometteurs. Dans cette étude, nous avons donc décidé de travailler sur la synthèse de composites cœur@coquille constitués d’une coquille de PANI et d’un cœur de particules de silice.Dans la littérature, en utilisant des protocoles expérimentaux similaires, deux morphologies très contradictoires ont été obtenues après la polymérisation par oxydation chimique d'aniline en présence de particules de silice : cœur@coquille et framboise (structure inversée avec la PANI comme cœur). Nous avons alors décidé de réexaminer la synthèse de PANI en présence de particules de silice. Pour cela, nous avons, dans un premier temps, synthétisé des particules de silice monodisperses de différentes tailles (300, 160 et 90 nm) par procédé Stöber. Nous avons ensuite réalisé la polymérisation chimique de l'aniline en présence de ces particules de silice dans des conditions contrôlées afin de promouvoir une adsorption des ions aniliniums en surface des particules. Différents paramètres expérimentaux ont été étudiés tels que la température, la concentration en réactifs, la taille des particules… Les résultats en termes de morphologie sont discutés en fonction de ces paramètres. Dans un second temps, nous avons fonctionnalisé la surface des particules de silice par un alcoxysilane afin de favoriser la polymérisation de l’aniline à la surface des particules. Ainsi, nous avons obtenu des structures SiO2@PANI avec une épaisseur de polymère contrôlable. La dernière partie de ce travail traite des premiers essais qui ont été réalisés afin d’utiliser ces composites SiO2@PANi pour des applications environnementales. Deux applications ont notamment été envisagées, l'adsorption de métaux pour l'aspect de particule et la détection de gaz pour les capacités conductrices de la PANIOrganic/inorganic hybrid materials have received much attention in recent years such as in the field of nano-materials. Indeed, these materials possess unique physical and chemical properties due to the synergistic effect of both components. In particular, silica nanoparticles (SiO2) present interesting properties, such as good chemical and thermal stabilities. They can be prepared in different size and can be easily chemically modified. Intrinsically conducting polymers such as polythiophene and polyaniline (PANI) can exist in different oxidation states and respond to external stimuli by changing one of their characteristics (color, conductivity, …). PANI is a non-toxic, thermally stable and low cost polymer with relatively high conductivity that has been used as antistatic coating, electrode materials, corrosion inhibitor and active layer of sensors. Since the discovery of conducting polymer in 1977, several works have been carried out on the preparation, characterization and applications of polymeric films build on various surfaces like silica. Among the different kinds of composites that exist, inorganic-polymer core-shell nanoparticles are more promising candidates. In this study, we decided to work on the synthesis of core@shell hybrid compounds based on PANI shells and silica nanoparticles cores.In the literature, using similar experimental protocols, two morphologies have been obtained after chemical polymerization of aniline in the presence of silica particles: core@shell and raspberry (inverted structure with PANI as core). We thus decided to reinvestigate the synthesis of PANI in the presence of silica particles. For this, we first synthesized silica particles with different sizes by Stöber process. We then performed the chemical polymerization of aniline in the presence of these naked silica particles under different conditions: temperature, concentration of reactive. However, in all cases, we never managed to obtain core@shell structures. Finally, we succeed in developing a method to prepare these core@shell particles which relies on the functionalization of the SiO2 by alkoxysilanes followed by the polymerization of aniline at room temperature. A series of core-shell particles with tunable PANI thickness has been prepared by this method. The last part of this work deals with the first tests that have been carried out in order to use these composites SiO2@PANi for environmental applications. Two applications have been considered, the adsorption of metals for the particle appearance and the detection of gas for the conductive capacities of the PANI
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Deptuch, Grzegorz. "Développement d'un capteur de nouvelle génération et son électronique intégrée pour les collisionneurs futurs". Phd thesis, Université Louis Pasteur - Strasbourg I, 2002. http://tel.archives-ouvertes.fr/tel-00011109.
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Les détecteurs de vertex sont importants pour les expériences de la physique des particules, car la connaissance de la saveur présente dans un événement deviendra une question majeure dans le programme de physique auprès du Futur Collisionneur Linéaire. Un capteur monolithique à pixels actifs (MAPS) basé sur une structure originale a été proposé. Le capteur est inséparable de son électronique de lecture, puisque les deux sont intégrés sur la même tranche de silicum basse résistivité qui constitue le substrat classique pour une technologie CMOS. La configuration de base est composée uniquement de trois transistors et d'une diode qui collecte par diffusion thermique la charge. Celle-ci est générée dans la couche épitaxiale mince, non-désertée en dessous du circuit de lecture. Cela permet d'obtenir un détecteur mince, de haute résolution, d'une surface entièrement sensible à la radiation et d'un faible coût de fabrication. Les simulations détaillées ont été effectuées en utilisant le logiciel ISE-TCAD pour étudier le mécanisme de collection de charge. Quatre prototypes ont été fabriqués en technologies CMOS submicroniques pour démontrer la viabilité de cette technique. Le gain des pixels a été calibré par irradiation à l'aide d'une source 55Fe et en appliquant la méthode fondée sur la séquence de Poisson. Les prototypes ont été également exposés aux faisceaux de particules de haute énergie au CERN. D'excellentes performances de détection ont été prouvées. Elles s'expriment par un rapport signal sur bruit supérieur à 30, une résolution spatiale de 1.5 μm et une efficacité de détection proche de 100%. Les tests d'irradiation ont démontré une résistance aux flux de neutrons jusqu'a quelques 1012 n/cm2 et une résistance aux rayonnements ionisants jusqu'à quelques centaines kRad. Des idées futures telles que l'amplification du signal sur le pixel, le double échantillonnage ainsi que la conception d'un pixel en mode courrant ont été également présentées.
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Reynaud, Adrien. "Compréhension et modélisation des mécanismes de captation des aérosols par couplage des phénomènes aérodynamiques et électriques". Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEM029.
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Les particules ultrafines émises par les moteurs thermiques ont un impact grave sur la santé. Depuis la norme Euro 3, la règlementation EOBD impose aux véhicules d’auto-diagnostiquer leurs propres organes de dépollution. Depuis la norme Euro 6b, le nombre de particules émises par les moteurs Diesel et essence est réglementé. Les capteurs résistifs permettent d’estimer le dépassement de seuil en concentration massique d’un aérosol de suie. Les suies se déposent entre les électrodes du capteur, créant des microstructures semblables à des ponts dont la résistance est mesurée.Leur robustesse et leur faible coût de fabrication en font de bons candidats pour le diagnostic embarqué des filtres à particules mais la concentration en nombre de particules n’est pas encore accessible.L’objectif de ce travail est d’étudier les mécanismes de captation conduisant à la formation des microstructures de suie. Dans une approche expérimentale, les particules de suie ont été classifiées en fonction de leur taille grâce à deux techniques différentes : la classification électrostatique et la classification aérodynamique. Cela a permis d’étudier le comportement du capteur soumis à des particules entre 60 et 150 nm.Enfin, un modèle de compréhension simule la construction des microstructures de suie. Les trajectoires des particules sont calculées et la modélisation de leur dépôt sur les électrodes est couplée avec le calcul des champs électrique et la dynamique des fluides. Cette méthode s’inspire d’un modèle de la littérature et l’enrichit d’un mécanisme appelé diélectrophorèse, expliquant mieux la formation des microstructures. L’influence de la taille des particules a été étudiée pour expliquer les tendances observées expérimentalementUltrafine soot particle emissions from thermal engines have harmful health effects. Since Euro 3 standard, EOBD regulation obliges vehicules to perform the on-board diagnostic of their own aftertreatment system. Since Euro 6b standard, the particle number (PN) emitted from Diesel and gasoline engines is regulated. Resistive sensors evaluate a particulate matter (PM) of soot threshold exceedance. The nanoparticles are collected between interdigitated electrodes, building bridgelike micro-structures of which. Although their robustness and their low production cost make the resistive soot sensor a good candidate for the Diesel particulate filter diagnosis, the current understanding does not allow to access PN.The objective of this work is to study the deposit mechanisms leading to the soot micro-structures. Particles have been classified according to their diameters in an experimental approach thanks to two different techniques : the electrostaticclassification and the aerodynamic classification. Those methods allow the study the sensor behaviour to monodisperse aerosol between 60 and 150 nm.Finally, a model for understanding the soot micro-structures construction have been developed. Soot particles are tracked until their deposit on the electrodes, which is coupled with the electric and aerodynamic fields computation. This approach is inspired by a model from the literature and is extended by a mechanism called dielectrophoresis, which provides a better understanding of the micro-structures construction. The influence of particle size was studied to explain trends observed experimentally
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Suwannin, Patcharapan. "Smart polymeric nanoparticles-based immunodiagnostic platform and biosensor for leptospira detection". Electronic Thesis or Diss., Lyon 1, 2024. http://www.theses.fr/2024LYO10180.
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L'objectif de cette thèse était de développer un outil de détection des bactéries leptospira capable de les détecter dans divers échantillons, tels que l'urine et le sang humains, ainsi que l'eau et le sol de l'environnement. Le développement d’une méthode de détection rapide de la leptospirose, basée sur le principe de l’agglutination des particules de latex, a impliqué l’élaboration d’un latex de polystyrène sensibilisé par adsorption des anticorps anti-leptospira. Cette méthode, basée sur une observation à l'œil nu, a démontré une bonne sensibilité et spécificité pour la détection de la leptospira dans des échantillons d'eau environnementale. De plus, pour augmenter la sensibilité, un capteur électrochimique basé sur l’utilisation d’une séquence d'oligonucléotide spécifique a été utilisé pour détecter l'ADN de la bactérie leptospira dans des échantillons d'urine artificielle. Le capteur développé a montré une très bonne sensibilité, indiquant une limite de détection inférieure à l'attomole (aM) et sans réactions croisées avec d'autres bactéries contaminant l'urine. Cette thèse propose des méthodes de détection allant d’une détection macroscopique simple à l’utilisation d’un capteur électrochimique pour une détection sensible et spécifiqueThe objective of this thesis was to develop a detection tool for leptospiral bacteria capable of detecting them in various samples, such as human urine and blood, as well as water and soil from the environment. The development of a rapid leptospirosis detection method, based on the principle of latex particle agglutination, involved the preparation of polystyrene latex sensitized by adsorption of anti-leptospira antibodies. This method, based on visual observation, demonstrated good sensitivity and specificity for the detection of leptospira in environmental water samples. Additionally, to increase sensitivity, an electrochemical sensor based on the use of a specific oligonucleotide sequence was employed to detect leptospiral DNA in artificial urine samples. The developed sensor showed very good sensitivity, indicating a detection limit below the attomole (aM) level and no cross-reactions with other bacteria contaminating the urine. This thesis proposes detection methods ranging from simple macroscopic detection to the use of an electrochemical sensor for sensitive and specific detection
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Chander, Bhan Chander Bhan. "Photonics-based environmental sensors for automotive air quality monitoring". Electronic Thesis or Diss., Lyon, INSA, 2024. http://www.theses.fr/2024ISAL0120.
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Cette thèse explore les dispositifs de circuits photoniques intégrés (PIC) basés sur une plateforme en nitrure de silicium (SiN), en mettant l'accent sur leur potentiel pour la détection de particules dans l'air, un élément clé des capteurs de l'indice de qualité de l'air (AQI). La haute sensibilité volumique des résonateurs à anneaux (MRR) dans ces dispositifs permet la détection de faibles concentrations de particules, tandis que les forces optiques permettent le piégeage spécifique à la taille des particules. Pour relever les défis liés au piégeage de particules diélectriques de moins de 100 nm, cette recherche explore diverses structures photoniques, y compris des guides d'onde diélectriques, des résonateurs en mode d'ordre supérieur (HOM) et des guides d'onde plasmoniques hybrides. cette étude comprend leur conception, leur fabrication et leur compatibilité avec des plateformes industrielles telles que DAPHNE de STMicroelectronics. L'analyse des forces optiques, réalisée à l'aide de méthodes telles que le tenseur de contrainte de Maxwell (MST) et l'approximation de dipôle discret (DDA), fournit un cadre rigoureux pour optimiser la conception et évaluer différentes structures. Les résultats soulignent le potentiel des guides d'ondes HOM et des guides d'ondes plasmoniques hybrides pour le piégeage optique avancé et la détection de l'IQA, ouvrant ainsi la voie à des approches innovantes pour les applications de surveillance de l'environnementThis thesis explores photonic integrated circuit (PIC) devices based on a silicon nitride (SiN) platform, focusing on their potential for airborne particle detection, a key component of air quality index (AQI) sensors. The bulk sensitivity of the ring resonators (MRR) in these devices enables detection of low particle concentrations, while the optical forces enable size-specific trapping of particles. To address the challenges of trapping dielectric particles smaller than 100 nm, this research explores various photonic structures, including dielectric waveguides, higher-order mode (HOM) resonators and hybrid plasmonic waveguides. The study includes their design, fabrication and compatibility with industrial platforms such as STMicroelectronics' DAPHNE. Optical force analysis, using methods such as Maxwell's stress tensor (MST) and discrete dipole approximation (DDA), provides a rigorous framework for optimizing the design and evaluating different structures.The findings underscore the potential of HOM waveguides and hybrid plasmonic waveguides for advanced optical trapping and AQI sensing, paving the way for innovative approaches to environmental monitoring applications
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Sarrot, Vincent. "Capture de fines particules par des inclusions fluides". Toulouse, INSA, 2006. http://eprint.insa-toulouse.fr/archive/00000189/.
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Cette étude concerne le mécanisme de collision entre une bulle sphérique et des particules dont le diamètre reste inférieur à quelques pourcents du diamètre de la bulle. Cette situation correspond à celle rencontrée dans la phase d’initiation du processus de capture dans des procédés de flottation. La détermination de l’efficacité s’appuie sur des mesures expérimentales et sur des simulations numériques directes (DNS). D’un point de vue expérimental, une cellule de flottation à bulles isolées à été conçue dans le but de mesurer l’efficacité de capture. De petites bulles sphériques sont produites par un capillaire, puis traversent une suspension de micro-billes de verre. Les particules capturées par la bulle sont dénombrées dans un compteur de particules. Les résultats sont analysés et les ordres de grandeur comparés favorablement à ceux de Ralston et al. (1999a). La tendance générale montre que l’efficacité de capture diminue avec le rapport de taille dp/db. Cette évolution observée est contraire à celle des modèles d’efficacité de collision de la littérature. Cet effet est attribué aux propriétés de mouillage des particules. D’un point de vue numérique, la simulation de l’écoulement autour d’une bulle permet de calculer la trajectoire de particules distribuées de manière uniforme. Pour les particules dont le nombre de Stokes est très inférieur à 1, leur trajectoire est confondue avec les lignes de courant du fluide. Les simulations numériques couvrent une large gamme des paramètres caractéristiques du problème (diamètre des particules ramené à celui des bulles, nombre de Reynolds de la bulle, degré de contamination de sa surface). L’efficacité de collision est une fonction croissante du nombre de Reynolds. L’efficacité d’une bulle propre tend de manière asymptotique vers une valeur constante que ce soit à petit ou à grand nombre de Reynolds. Pour une bulle complètement contaminée, la tendance asymptotique à petit nombre de Reynoplds est egalement une constante alors qu’à grand nombre de Reynolds l’efficacité suit une loi en Re0,45. En fonction du degré de contamination de l’interface, l’efficacité de collision suit tantôt un comportement de type bulle propre en dp/db, tantôt un comportement de type bulle contaminée en (dp/db)2. Des modèles sont proposés sur toute la gamme des différents paramètresThis study focuses on the collision mechanism between a spherical bubble and particles when the particle diameter remains less than some percents of the bubble diameter. This situation corresponds to the first step of the particle capture in flotation processes. The efficiency determination is based on experimental measurements and Direct Numerical Simulations (DNS). Experimentally, a single bubble flotation cell has been build for the purpose of measuring capture efficiency. Small spherical bubbles are created by a capillary tube and then arise through a suspension capturing glass particles. Captured particles are recovered by overflow and are counted in a particle counter. Results are analysed and the magnitude is favorably compared to those of Ralston et al. (1999a). Efficiencies exhibit a general decreasing trend with particle to bubble diameters ratio dp/db, in opposition to the trend analytically predicted by collision efficiency models in litterature. This effect seems to be due to wetting properties of particles. Numerically, the flow around the bubbles is computed and particle trajectories determined. Particle with Stokes number less than 1 follow the streamlines. In this case, the collision efficiency only depends on the shape of the streamlines and on the size of the particles. Numerical simulations have been performed over large parameter ranges (particle to bubble diameters ratio, Reynolds number of the bubble and the degree of contamination of the bubble surface). The collision efficiency is found to increase with the Reynolds number and significantly decrease with the level of contamination. For clean (respectively fully contaminated) spherical bubbles, the efficiency evolves as dp/db (respectively (dp/db)2), whatever the bubble Reynolds number and the particle size. For partially contaminated bubbles, efficiency can be scaled with dp/db or (dp/db)2 depending on both the level of contamination and the particle size. Correlations of the numerical results are proposed for efficiencies versus dp/db, bubble Reynolds number and interface contamination degree
Libros sobre el tema "Capteur de particules"
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Meares, John. The memorial of Lt. John Mears of the Royal Navy: Dated 30th April, 1790, and presented to the House of Commons, May 13, 1790, containing every particular respecting the capture of the vessels in Nootka Sound. Fairfield, Wash: Ye Galleon Press, 1985.
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Pierre Marie Louis de Boisgelin de Kerdu. Ancient and modern Malta: Containing a description of the ports and cities of the islands of Malta and Goza, together with the monuments of antiquity still remaining, the different governments to which they have been subjected, their trade and finances ; as also, the history of the Knights of St. John of Jerusalem, from their first establishment in Malta, till the beginning of the 19th century : with a particular account of the events which preceded and attended its capture by the French and conquest by the English. Valletta, Malta: Midsea Books Ltd., 1988.
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Miller, David, Claire Harkins, Matthias Schlögl y Brendan Montague. Lobbying and policy capture. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780198753261.003.0010.
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This chapter examines how policy is captured and aims to show how the capture of the other domains examined in this book relate to the ultimate prize of policy capture. Notable, however, policy can be captured variety of ways. The chapter considers two dimensions of policy capture—upstream and downstream. ‘Downstream’ refers to attempts to influence particular policy measures that might directly affect the industry concerned. ‘Upstream’ refers to influencing the agreed procedures by which decisions on particular matters will be taken in years to come. After that we turn to a relatively recent innovation in policy making that challenges the very categories adopted in policy studies. Partnership governance breaches the seemingly clear conceptual split between interest groups and government. We examine some key UK and EU examples in the addictions field, asking about the implications for public health and corporate power.
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Titelbaum, Michael. Self-Locating Credences. Editado por Alan Hájek y Christopher Hitchcock. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199607617.013.34.
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An agent's self-locating credences capture her opinions about who she is, where she is, and what time it is. Most authors agree that self-locating credences cannot be rationally updated simply by applying traditional Bayesian conditionalization. After explaining why this is, I catalog alternative updating schemes that have been proposed for self-locating credence. I separate those schemes into three broad approaches: ‘shifting schemes’, ‘stable base schemes’, and ‘demonstrative schemes’. Each approach solves particular problems but has its particular blindspots. I then suggest that the Sleeping Beauty Problem has generated so much controversy in the literature because it falls into the blindspots of all three types of updating schemes.
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Auyoung, Elaine. Organizing Things in Dickens. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190845476.003.0004.
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This chapter demonstrates how the organization of narrative information can shape a reader’s impression of what is represented. It focuses on two ways in which concrete objects are arranged in Charles Dickens’s Bleak House: as specific members of general categories and as part of causally connected narrative structures. Dickens relies on these representational strategies to capture a scale of reality no longer suited to the individual human body. In doing so, he also reveals that the realist novel’s conventional commitment to individual experience at the scale of concrete particulars reflects constraints on the comprehension process.
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French and Indian cruelty: Exemplified in the life and various vicissitudes of fortune of Peter Williamson: containing a particular account of the manners, customs and dress of the savages; of their scalping, burning, and other barbarities ... together with a description of the most convenient roads for the British forces to invade Canada ... Glasgow: Printed by J. Bryce and D. Paterson ..., 1985.
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Wallace, Helen y Christine Reh. 4. An Institutional Anatomy and Five Policy Modes. Oxford University Press, 2017. http://dx.doi.org/10.1093/hepl/9780199689675.003.0004.
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This chapter examines the European Union’s institutional design and how its institutions interact with national institutions in five different policy modes. It first considers the evolving role and internal functioning of the European Commission, Council of the EU, European Council, European Parliament, and Court of Justice of the European Union (CJEU). It also discusses quasi-autonomous agencies, in particular the European Central Bank (ECB), institutionalized control and scrutiny, and non-state actors. It concludes with an analysis of five EU policy modes that capture the different patterns of interaction between EU and national institutions: the classical Community method, the regulatory mode, the distributional mode, the policy coordination mode, and intensive transgovernmentalism.
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Meares, John. The Memorial of Lt. John Meares of the Royal Navy: Dated 30th April, 1790, and Presented to the House of Commons, May 18, 1790, Containing Every Particular Respecting the Capture of the Vessels in. Ye Galleon Pr, 1985.
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Weerman, Frank M., Evelien Hoeben, Wim Bernasco, Lieven J. R. Pauwels y Gerben J. N. Bruinsma. Studying Situational Effects of Setting Characteristics. Editado por Gerben J. N. Bruinsma y Shane D. Johnson. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780190279707.013.20.
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This chapter addresses methods to study situational influences of setting characteristics on adolescent offending. In particular, it describes data collection methods (space-time budget interviews, census data, community surveys, and systematic social observations) that enable precise measurement of what respondents do, with whom they undertake these activities, and in what kind of places (both the geographical area and the function of the location) they find themselves. Such data capture presence in and exposure to different kinds of settings during particular periods in time. This chapter illustrates the usefulness of these method for criminological research by summarizing the results of three sub-studies from the Study of Peers, Activities, and Neighborhoods (SPAN) conducted in the Netherlands. It first discusses the design of the SPAN data collection and the instruments that were used in it. It then reviews each study in turn by summarizing its theoretical motivation, data structure, and analytical strategy, and by describing the main findings it has generated.
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Stokke, Andreas. What is Said. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198825968.003.0004.
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This chapter provides a new theory of the notion of what is said that is central to the book’s account of assertion, and hence of lying. It argues that what is said by utterances, in context, is relative to discourse structure, in particular, to socalled questions under discussion. The chapter shows that utterances of the same declarative sentence can be used to say, and hence assert, different things relative to which question is being addressed. In turn, the same declarative utterance may be a lie relative to one question under discussion and merely misleading relative to another question under discussion. Discourse-insensitive accounts of what is said fail to capture the lying-misleading distinction. A semantics for questions is provided and is employed in a detailed definition of what is said relative to questions under
Capítulos de libros sobre el tema "Capteur de particules"
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Duan, Lunbo y Lin Li. "OCAC for Fuel Conversion Without CO2 Capture". En Oxygen-Carrier-Aided Combustion Technology for Solid-Fuel Conversion in Fluidized Bed, 19–63. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9127-1_3.
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AbstractAs a new concept, oxygen carrier aided combustion (OCAC) technology proposed in 2013 by Chalmers University of Technology’s group, can alleviate the problem of uneven distribution of oxygen in the reactors. In the past 10 years,various research institutions, including Chalmers University of Technology, University of Cambridge, Tsinghua University, Friedrich-Alexander University and University of Nottingham, have conducted a series of studies on OCAC technology. It is worth mentioning that Chalmers University of Technology has complied with most of these studies from laboratory to industry scales. In particular, they carried out a serious of semi-industrial scale experiments in the 12 MWthCFB boiler, which is well-known research boiler. OCAC technology is comprehensively introduced from six aspects: combustion characteristics, NOx/SOx emission, ash-related issues, aging of oxygen carrier, oxygen carrier recovery and physicochemical characteristics of oxygen carrier. In this chapter, allsummarized studies were performed under traditional air-combustion conditions without much consideration of CO2 capture.
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Mohan, Akhil y Vasudeva Madav. "Capture and Characterization of Particulates from a Single-Cylinder Diesel Engine Fuelled with Refined Tire Pyrolysis Oil". En Green Energy and Technology, 107–17. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2279-6_10.
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Kawane, Ryuto, Hiromasa Ijuin, Ryosuke Nakajima, Masao Sugi, Shuho Yamada y Tetsuo Yamada. "Measurement of Disassembly Work Using Optical Motion Capture". En Lecture Notes in Mechanical Engineering, 103–10. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-28839-5_12.
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AbstractIn recent years, the depletion of natural resources has been severe globally. One of the solutions to this problem is to reuse and recycle materials from end-of-life (EOL) products and reduce waste. In the industrial field, disassembly work is needed to take back parts/materials from the end-of-life assembly products. Furthermore, in the manufacturing industry, there are human resource development or skill transfer issues due to a declining birth rate and an aging population as well as a labor shortage in developed countries. In particular, in Japan, the population aged 65 and overreached 28.8% of the total population in 2019, and the labor shortage has become more serious. To resolve these issues, the digitization of skills through optical motion capture is promoted in this industry, where three-dimensional coordinate data of workers can be accurately measured. Toshiba Corporation has introduced motion capture for achieving more effective guidance and skill transfer at the work site. However, data related to disassembly were not obtained via motion capture. This study measures and analyzes the motion data for disassembly work obtained via optical motion capture. First, the motion data for disassembly work is obtained via optical motion capture. Next, the data obtained is shown graphically and compared by body part. Finally, the results are shown and discussed.
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Ueda, Kyohei, Yoshikazu Tanaka, Anurag Sahare, Ahmed Elgamal, Zhijian Qiu, Rui Wang, Tong Zhu et al. "LEAP-ASIA-2019 Simulation Exercise: Comparison of the Type-B and Type-C Numerical Simulations with Centrifuge Test Results". En Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading II, 61–99. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-48821-4_3.
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AbstractThis chapter presents a summary of Type-B and Type-C numerical simulations submitted by nine numerical simulation teams that participated in the LEAP-ASIA-2019 prediction campaign, with the results of a selected set of centrifuge model tests on the seismic behavior of a uniform-density, 20-m-long, and 5-degree sandy slope. Time histories of response accelerations, excess pore water pressures, and lateral displacements at the ground surface are compared to the experimental results. A majority of Type-B and Type-C numerical simulations were capable of simulating well the experimental trends observed in the centrifuge tests; in particular, Type-C simulations were found to capture the measured responses more accurately by adjusting the model parameters. Although it is quite challenging to perfectly capture all measured responses (e.g., accelerations, pore pressures, and displacements), the simulation exercises demonstrate that the numerical simulations can be further improved by accumulating high-quality experimental results as a database.
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Rajavel, Arunkumar. "Some Timeless and Contemporary Borders". En IMISCOE Research Series, 157–64. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-41348-3_13.
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AbstractAlthough I’m an immigrant who, having lived in 4 different countries, has countless stories and anecdotes (Particulars) that can relate to this anthology, I’m a philosopher by training. Things in their abstract and conceptual forms (Universals) fascinate me. While I do not mean to downplay the Particulars, there is something about Universals/Generalisations that intrigue me. For this submission, accordingly, I took a step back and looked at the grand story of migration. ‘You Lie in Wait, You Observe’ is the product of this endeavour. In a bid to capture the crucial role that migration has played in the story of us humans, I reimagine the reader as a timeless spirit that awakens at the dawn of Homo Sapiens who is doomed to only observe, and are powerless to alter anything. The idea is to question the arbitrariness and artificiality of borders and immigration policies, and how that determines the fate of different people.
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Capp, Bernard. "From Capture to Slave Market". En British Slaves and Barbary Corsairs, 1580-1750, 22–38. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780192857378.003.0003.
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Chapter 2 opens with the dilemma facing ships pursued by corsairs, whether to fight, flee, or surrender, and the tactics employed by their attackers. It shows how fight and flight were often not realistic options, and how prompt submission might result in less harsh treatment. But the chapter shows how other crews put up fierce resistance, sometimes suicidal, sometimes successful and celebrated in printed accounts. It then explores the traumatic experience of capture, and explains the deliberately harsh treatment meted out to new captives. It ends with an account of the dehumanizing humiliations of the slave market, where former slaves recalled being treated like animals. The chapter also explores the particular treatment of children, adolescents, and women.
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Bagg, Samuel Ely. "What Is State Capture?" En The Dispersion of Power, 79–107. Oxford University PressOxford, 2024. http://dx.doi.org/10.1093/oso/9780192848826.003.0005.
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Abstract This chapter begins to articulate the core ideal defended in the book: democracy as resisting state capture. This ideal conceives democracy as a set of practices that help to promote the public interest by protecting public power from capture at the hands of any group. The aim of this chapter is to elaborate the core concept of “state capture,” and it begins by examining its relationship to other key terms such as democracy and the public interest, before exploring the very diverse range of forms state capture can take. Defined as the use of public power to pursue private interests at the expense of the public, the concept of state capture is an umbrella term encompassing problems as diverse as regulatory capture, corruption, clientelism, authoritarianism, oligarchy, and racial caste systems, and the chapter draws from historical and social scientific research on all of these phenomena. It then situates these particular literatures within the broader framework provided by two recent comprehensive theories of political economy, both of which demonstrate how pervasive state capture by a narrow elite characterized nearly all state-based societies in human history. Where these theories emphasize the progress achieved by liberal democratic societies in this regard, however, this chapter also stresses the significance of certain forms of capture that persist and even intensify in those societies. Engaging extensively with empirical research, it devotes special attention to two forms of capture that are especially severe and pervasive across all modern democracies: those benefiting categorically advantaged groups and wealthy elites.
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Noordhof, Paul. "The Ontological Categories of Causes". En A Variety of Causes, 194–224. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780199251469.003.0007.
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A distinction is drawn between what kinds of entities may be causes and what are the fundamental causal relata. Arguments to settle the latter arise from the nature of the causal relation or more general ontological issues. Events are one fundamental causal relata because they are needed to be triggering causes. There is no need to recognize other fundamental relata than properties. Recognition of facts is neither required to capture the nature of causation nor for their truth-making role since no such role is required. Events are temporally limited particulars involving the instantiation of the properties required for the instantiation of a particular determinate property. More finely individuated events, involving the instantiation of perhaps just one property, are unnecessary. They are not needed to capture the truth of various causal claims or make the analysis of causation. Indeed, the analysis removes an argument for these other ways of understanding events.
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Gudmundsson, Kjartan, Giuseppe Digregorio y Jiayu Cui. "Customized Data Capture for BIM". En Research Anthology on BIM and Digital Twins in Smart Cities, 189–207. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-7548-5.ch010.
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Building information models (BIMs) make it possible to share structured data in the planning and building process and during the live cycle of the building. The models can be enrichened with information in all stages from planning to end-of-life. Predefined information requirements, data structures, and file formats allow the model to be used for design, cost planning, and time scheduling as well as analysis of building performance, and ideally also for facilities management. This chapter describes the possibilities of using application programming interfaces (APIs) to enhance the usefulness of BIM models. This provides the user with the possibility of creating own applications with real time bidirectional data exchange. Of particular interest is the exchange of data with web-based data sources. The applicability is illustrated with examples of environmental analysis based on web-based data and the use of web-based forms to enrichen BIM models with data input from building users.
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Gudmundsson, Kjartan, Giuseppe Digregorio y Jiayu Cui. "Customized Data Capture for BIM". En Advances in Civil and Industrial Engineering, 448–68. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7091-3.ch020.
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Building information models (BIMs) make it possible to share structured data in the planning and building process and during the live cycle of the building. The models can be enrichened with information in all stages from planning to end-of-life. Predefined information requirements, data structures, and file formats allow the model to be used for design, cost planning, and time scheduling as well as analysis of building performance, and ideally also for facilities management. This chapter describes the possibilities of using application programming interfaces (APIs) to enhance the usefulness of BIM models. This provides the user with the possibility of creating own applications with real time bidirectional data exchange. Of particular interest is the exchange of data with web-based data sources. The applicability is illustrated with examples of environmental analysis based on web-based data and the use of web-based forms to enrichen BIM models with data input from building users.
Actas de conferencias sobre el tema "Capteur de particules"
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Krishnadoss, Rajalakshmi y Thomas A. Adams. "Integration of a Chemical Heat Pump with a Post- combustion Carbon Capture Sorption Unit". En Foundations of Computer-Aided Process Design, 484–89. Hamilton, Canada: PSE Press, 2024. http://dx.doi.org/10.69997/sct.128149.
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A novel process system which integrates an isopropanol-based chemical heat pump with a post-combustion carbon capture unit was proposed, designed, and analyzed. The system uses low-quality waste heat (~80�C) produced through the CO2 adsorption step of a carbon capture process and upgrades that heat to a higher temperature (~150�C) using the chemical heat pump. The chemical heat pump is powered mostly by the waste heat and requires only a small amount of electricity. The higher temperature heat produced can be used in the desorption stage of the CO2 capture process, displacing a portion of the existing fossil energy required. The energy and exergy performance characteristics of the chemical heat pump were computed using the results of a steady state simulation in a systems analysis. Using exergy cost correlations, the profitability of the chemical heat pump concept was estimated. It was found that for this particular configuration, the fossil energy load of desorption could be reduced by roughly 2.7% with very little parasitic electric load.
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Federici, Justin A., Dimitri J. Papageorgiou y Robert D. Nielsen. "Connecting the Dots: Push and Pull between Technology R&D and Energy Transition Modeling". En Foundations of Computer-Aided Process Design, 32–38. Hamilton, Canada: PSE Press, 2024. http://dx.doi.org/10.69997/sct.161638.
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This paper discusses the symbiotic relationship between technology research and development (R&D) and energy transition modeling. On the one hand, energy system modeling has a noteworthy history of providing macroscopic views and critical insights concerning the role that myriad technologies may play in the future energy system. On the other hand, R&D can lead to both incremental and disruptive technological advances that can shape energy transition planning. In this work, we focus on the bidirectional flow of information between the two with a particular focus on highlighting the potential role of carbon capture, storage, and sequestration technology.
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Warren, Jerry, S. Gibbs, W. Wilkie y Earl Dowell. "Stability of Rotorcraft for Interplanetary Space Flight". En Vertical Flight Society 70th Annual Forum & Technology Display, 1–9. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9420.
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NASA is currently exploring propellantless spacecraft propulsion technologies required to enable missions ranging from orbital debris capture and removal to station keeping in unstable locations in space to deep space exploration. In this paper we explore the stability of a particular propellantless spacecraft, a spinning, helicopter-like solar sail. We demonstrate the possibility of an instability due to the coupling between the structural dynamics and the solar radiation forcing using a nonlinear model. We show that our model reproduces previously published results and compares well with simulations conducted using a finite element simulation. In addition the paper explores the stability of a proposed spinning solar sail during deployment and identifies critical combinations of spin rate and lengths that increase the possibility of an instability arising.
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Roop, Jonathan, Sheldon Jeter, Said I. Abdel-Khalik y Clifford K. Ho. "Optical Properties of Select Particulates After High-Temperature Exposure". En ASME 2014 8th International Conference on Energy Sustainability collocated with the ASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/es2014-6504.
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One increasingly viable option for high temperature concentrator solar power (CSP) is a central receiver system with a particle heating receiver (PHR). A PHR system uses suitable particulates to capture and store energy. It is expected that the particles will be sustained at high temperatures (in the range of 300°C or 400°C to 700°C or 800°C or even 1000°C) on most typical days of plant operation, so there is interest in how the particle optical properties might change after prolonged high-temperature exposure. This paper presents the results from experiments conducted over a 5-month period in which samples of various types of particulates including silica sands and alumina proppants were exposed to high temperatures for extended periods of time. The reflectance of a bed of particles was measured at room temperature in 8 wavelength bands using the 410-Solar reflectometer device developed by Surface Optics Corporation. The infrared emittance was determined using the ETS-100 emissometer instrument, also developed by Surface Optics Corporation [1,2]. Particles were heated to 950°C and 350°C, and measurements were recorded at intervals during the exposure so that trends in the optical properties over time could be observed. From the measured data, the total solar absorptance and total hemispherical emittance at high temperature were computed; these results are also presented.
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Bardwell, M., S. Bari y R. Marian. "An Approach to Clean Particulates From Diesel Emissions: EDPS Baseline Prototype Testing Equipment and Methodology". En ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71325.
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Diesel exhaust particulate matter (PM) is deadly to humans, animals and plants so the future of diesel engine is uncertain. Alternative powered vehicles have major limitations and costly. Recent developments to limit PM emissions have significant disadvantages to the point where they cannot be considered to be reliable long term technical and economical solutions. Electrostatic filtration could be used together with existing filters or as a standalone system. The most popular method of decreasing PM emissions is by the use of ceramic diesel particulate filters which is not efficient at filtering ultrafine particulates. Electrostatic filtration is a promising approach which can capture ultrafine particulates which could be used in conjunction with ceramic DPFs, metallic flow through filters (FTF) or, ideally as a standalone system. Development of prototype electrostatic diesel particulate filtration systems (EDPS) requires reliable testing. Prototyping needs quick, repeatable and affordable results to validate theories and a solution had to be developed. This paper presents the development of the EDPS prototype testing procedures and equipment with preliminary test results. By repurposing proven test equipment for the use of exhaust sampling, a test rig and a repeatable procedure for testing prototype filters were developed with low initial and ongoing costs.
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Edipo, Douglas y Cláudio Gomes. "Chrome T-Rex a partir de trilha sonora cultural personalizada e adaptada para movimentações por tecnologia assistiva". En Anais Estendidos do Simpósio Brasileiro de Jogos e Entretenimento Digital. Sociedade Brasileira de Computação, 2023. http://dx.doi.org/10.5753/sbgames_estendido.2023.235974.
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Os jogos digitais são grandes receptivos de tecnologias, como a captura de movimentos auxiliando a capacidade física de pessoas com deficiência para maior interação social e cultural. Os jogos eletrônicos são produtos tecnológicos de produção cultural midiática promovendo uma realidade alternativa com diferentes papéis. Este trabalho apresenta uma nova versão do jogo Chrome T-Rex com personagens regionais gerando uma msica particular baseada na jogabilidade e com adição de tecnologia assistida. Além das opções de jogabilidade, adicionou-se um dispositivo baseado em arduino e acelerômetro para captar movimentações do participante, que tenham ou não alguma deficiência física, enviando dados via protocolo WiFi a um servidor local.
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Chavez, Rosa-Hilda, Javier de J. Guadarrama y Abel Hernandez-Guerrero. "A Study Numerical Simulation of Post Combustion CO2 Capture Process". En ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10502.
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Amine absorption technology, in particular that based on the Monoethanolamine (MEA) process, is considered to be viable for low pressure flue gas CO2 capture because of the MEA-CO2 fast reaction rate. MEA absorption processes are associated with high capital and operating cost because a significant amount of energy is required for solvent regeneration and severe operating problems are present such as corrosion and solvent loss and degradation. The overall objective of this study is to evaluate the feasibility of obtaining the heat required for amine absorption for a particular recovery of carbon dioxide. Comparisons among cases were performed to determine the best operating conditions for CO2 capture. An analysis of the lean loading and recovery percent were carried out as well as the different absorber and stripper combinations by using the chemical processes simulator.
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Zanganeh, Kourosh E., Ahmed Shafeen, Murlidhar Gupta, Emmanuel O. B. Ogendengbe y Milenka Mitrovic. "Gas Turbine Integrated High-Efficiency Oxy-Fuel Combustion Process With CO2 Capture". En ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-51456.
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Fossil fuel energy conversion processes are the primary source of anthropogenic greenhouse gas emissions. New approach to utilization of fossil fuels through near-zero emission energy conversion systems represents an emerging opportunity for developing new concepts and designs, increasing the efficiency of the baseline combustion processes and reducing their environmental footprints, including greenhouse gas emissions, through CO2 capture and storage. Oxy-fuel combustion process provides an elegant way to address the environmental issues, in particular CO2 emissions, associated with current combustion systems. In this process nearly pure oxygen (instead of air) is burned with fuel. The resulting flue gas is composed mainly of CO2 and H2O, and other trace contaminants (e.g., SOx, NOx and particulates). The challenge faced in the development of oxy-fuel systems is the inability of current design configurations and materials for combustors, boilers, and turbo-machinery, to operate at the high temperatures resulting from burning the fuel in pure oxygen. Recent development at CANMET has been focused on design of a new generation of advanced oxy-fuel systems. These systems are very compact and can be integrated with a modified gas turbine to generate electricity, while the products of combustion can be sent to another turbine for recovery. The resulting CO2-rich stream at the outlet of the turbine is then sent to a CO2 capture and compression unit to separate and compress CO2 for pipeline transport. In this paper we present this proposed gas turbine integrated high-efficiency oxy-fuel combustion process and its main components, including the gas turbine and heat recovery system design. Moreover, we will present the results of the overall system integration, performance modeling and simulation to develop the tools required to asses the efficiency and viability of the overall integrated system and its components.
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Muliawan, Made Jaya, Zhen Gao, Torgeir Moan y Aurelien Babarit. "Analysis of a Two-Body Floating Wave Energy Converter With Particular Focus on the Effects of Power Take Off and Mooring Systems on Energy Capture". En ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49135.
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The present paper summarizes analyses of a two-body floating wave energy converter (WEC) including the mooring system. An axi-symmetric Wavebob type WEC is chosen as the object of investigation here. However, the PTO system is modeled in a simplified manner as ideal linear damping and spring terms that couples the body 1 and the body 2 motions. The analysis is done using SIMO, a time domain simulation tool which accommodates simulation of multi-body systems with hydrodynamic interactions. In SIMO, docking cone features have been introduced between the two bodies to let them move as per actual operation and fenders are applied to represent end stops. Six alternative mooring configurations are applied to investigate the effect of mooring on power capture. In this paper, the software HydroD using WAMIT for hydrodynamic is used to determine hydrodynamic loads. The analysis is carried out for several regular and irregular wave conditions as representative of operational conditions. Simulations are performed with the purpose to study the effects of power take off (PTO) system, end stops setting and several mooring configurations on power captured by the WEC.
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Haacke, S., B. Deveaud, D. Y. Oberli, E. Kapon, U. Marti y F. K. Reinhart. "Carrier capture in GaAs quantum wire structures grown on V-groove substrates". En Quantum Optoelectronics. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/qo.1995.qthe10.
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Carrier capture in quantum wells (QWs) has been intensively studied in the past years, especially concerning the dependence of the capture time on QW and barrier dimensions [1]. On the other hand, little is known about the carrier transfer and capture times into one-dimensional (ID) quantum wires (QWRs). In particular, in structures such as crescent-shaped QWRs grown on V-groove substrates, in which the carriers are transferred via both 3D barrier and 2D QW regions surrounding the wires, the carrier capture into the QWRs can be quite complex.
Informes sobre el tema "Capteur de particules"
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Lischer-Katz, Zack, Rashida Braggs y Bryan Carter. Investigating Volumetric Video Creation and Curation for the Digital Humanities: a White Paper Describing Findings from the Project: Preserving BIPOC Expatriates’ Memories During Wartime and Beyond. The University of Arizona Libraries, 2024. http://dx.doi.org/10.2458/10150.674673.
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Volumetric video capture technologies offer humanities scholars and other researchers new, immersive ways of engaging with historical and cultural knowledge for research and pedagogical purposes; however, the high cost of this technology and a paucity of expert knowledge in the field have limited its adoption. In particular, volumetric video offers rich new possibilities for recording, preserving, and re-experiencing BIPOC (Black, indigenous, and other people of color) stories in immersive detail, which have been underrepresented in the historical record. This technology is still experimental and is typically limited to specialized labs at large research universities. To democratize the technology and ensure that the potential benefits of this new technology can be realized by digital humanities scholars more broadly, a group of researchers at the University of Arizona and Williams College, in collaboration with technical innovators from the world-renowned volumetric capture studio, VoluCap, GmbH, embarked on a project to explore the challenges and potential benefits of volumetric video capture for BIPOC storytelling. The team traveled to Berlin/Potsdam in June 2023 to visit VoluCap Studios and record several volumetric capture videos, including a video of Mike Russell, who told a story about his father’s experiences as an African-American servicemember during World War II. Recording these videos and observing their processing pipeline allowed us to consider the logistical and data curation challenges of this format. Dr. Bryan Carter, lead-PI on the project, is also director of UArizona’s Center for Digital Humanities, which houses a prosumer-level volumetric capture studio. Comparing the workflows at the Center for DH with what was observed at VoluCap allowed the project team to better understand the challenges and benefits of volumetric capture at different scales and levels of quality. Because volumetric videos are expensive and time consuming to create, an important objective of this project was to examine the preservation and curation challenges associated with the digital objects created through the volumetric capture process. Planning for preservation, access, and reuse of volumetric video assets is essential to realizing their full value. This report describes the creation challenges and pedagogical benefits of volumetric video, as well as preservation and curation challenges.
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Baker, James y Sofya Shahab. Preserving Communities' Heritage: A Workbook for Heritage Capturers. Institute of Development Studies (IDS), noviembre de 2021. http://dx.doi.org/10.19088/creid.2021.006.
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This is a practical workbook to guide local communities and heritage gatherers through the process of capturing and storing their heritage for future generations. Through initiatives with the British Academy and the Coalition for Religious Equality and Inclusive Development (CREID), the Institute of Development Studies (IDS) has been working with young people in Egypt, Iraq and Syria to capture their oral heritage, so that it may be preserved for future generations. Alongside life history interviews and topic interviews - which cover particular aspects of communities’ heritage - a key component of this heritage preservation is how these records will be stored. Thinking about the language and accessibility of digital archiving practices, this workbook is a practical guide to capturing and storing “heritage harvests”, including community interviews, photographs, and short films.
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Nyman, Matt, Nancy Staus y Martin Storksdieck. Science and Art Teaching Practices for Oregon Elementary Teachers: Results of a Landscape Survey. Oregon State University, septiembre de 2023. http://dx.doi.org/10.5399/osu/1163.
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An Evaluation Report for the Oregon Department of Education. In collaboration with classroom teachers and WRAP personnel we developed and implemented a survey to collect baseline data on the science and arts teaching practices for ALL elementary teachers. This included “regular” classroom teachers (those teachers with an assigned physical classroom and set of students), art teachers, music teachers, PE teachers and other educators or administrators. In December 2022 we recruited three (3) elementary teachers to assist us in survey development, in particular framing questions around frequency of teaching time for both arts and science instruction. One important outcome was that we formulated questions around “dedicated” teaching time where instruction was only focused on science or art content and “integrated” teaching when teachers combine science or art with other instructional areas (such as math or literacy). We also learned that there was a lot of nuances in trying to capture the science and art teaching data; for example, some schools have large blocks of time when they have a particular focus on a science content area and then equally large blocks when science teaching is replaced by instruction in other fields, such as social science. It can be difficult to reduce this instructional framework to a weekly allotment of science teaching.
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Bover, Olympia, Laura Crespo, Sandra García-Uribe, Marina Gómez-García, Paloma Urcelay y Pilar Velilla. Micro and macro data on household wealth, income and expenditure: comparing the Spanish Survey of Household Finances (EFF) to other statistical sources. Madrid: Banco de España, marzo de 2024. http://dx.doi.org/10.53479/36212.
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This paper assesses how magnitudes constructed from Spanish Survey of Household Finances (EFF) micro data compare with magnitudes from alternative sources, including the Financial Accounts of the Spanish Economy (FASE) and other income and consumption surveys. To do so, first we analyse the main differences among the sources and the main concepts that can be compared. For those magnitudes that are conceptually comparable, we quantify the extent to which the EFF magnitudes capture those from the other sources used. We document a high degree of conceptual and quantitative comparability. Our results show that aggregate non-financial assets and debts from the EFF are similar to the aggregated magnitudes from other sources. The composition of the financial asset portfolio held by households in aggregate terms is also similar across the sources, while the comparison for each individual financial asset category varies. In particular, listed and unlisted shares in the survey are the closest to their FASE counterparts. For income, the aggregate calculated on the basis of the EFF data is close to the aggregates calculated from several different sources. The results also show that the similarity between the EFF and other sources has improved across waves for some particular variables, for example, debt magnitudes.
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Donnelly, Alan, Rachael Parsons y Daniel Pearson. Exploring Course Leaders’ Reflections of Learning Communities at Sheffield Hallam University. Sheffield Hallam University, 2021. http://dx.doi.org/10.7190/steer/learning_communities.
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The overarching aim of the project was to explore and capture examples of practices and ideas for success to enhance the course experience for students, with a particular emphasis on the theme of learning communities. Learning communities was an area that received a notable decrease in student satisfaction in the 2021 National Student Survey (NSS) at Sheffield Hallam University. Interviews were carried out with eight course leaders to explore: the practices used on their courses; the aspects that could be made even better; the evidence that they draw upon to understand the effectiveness of these practices. The following themes were identified: 1) staff-student relationships; 2) curriculum content and pedagogy; 3) peer networks and relationships; 4) supportive relationships between staff members; 5) societies and external networks. The practices identified by course leaders were consistent with practices identified in other relevant literature.
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Warin, Thierry. The World Health Organization in a Post-COVID-19 Era: An Exploration of Public Engagement on Twitter. CIRANO, junio de 2022. http://dx.doi.org/10.54932/ehuh4224.
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This article analyses the conversations on Twitter related to the World Health Organization (WHO). We collect the text of the discussions as well as the metadata associated with each tweet. Our dataset is exhaustive as it includes all the tweets produced by WHO. Likes, retweets, and replies capture the level of engagement. The goal is to quantify the balance of likes, retweets, and replies, also known as “ratios”, and study their dynamics as proxy for the collective engagement in response to WHO’s communications. Our results demonstrate a higher engagement of the public receiving the information pushed by WHO. This engagement translates into a more balanced reaction with still a more likely favorable opinion vis-à-vis WHO, but with also more challenges. This protocol based on quantitative measures to serve as a proxy to the legitimacy concept seems to hold its promises. In particular, we also perform a simple sentiment analysis to check the robustness of our conclusions.
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Bran, Julio, Eduardo Baumeister, Antonio Yúñez Naude, Nancy Jesurun-Clements, Arie Sanders y J. Edward Taylor. Los posibles efectos de la liberalización comercial en los hogares rurales centroamericanos a partir de un modelo desagregado para la economía rural: Caso de Honduras. Inter-American Development Bank, abril de 2006. http://dx.doi.org/10.18235/0010159.
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El presente estudio nació como respuesta a la necesidad de conocer los impactos que el tratado de libre comercio con los Estados Unidos (DR-CAFTA) tendría en la economía rural, en particular en sus segmentos más pobres. La metodología utilizada toma en cuenta la heterogeneidad de los hogares rurales de Honduras, las vinculaciones económicas entre ellos y sus relaciones con los mercados. Se usa un modelo microeconómico con los distintos tipos de hogares rurales como unidad de análisis. Al mismo tiempo, el modelo es de equilibrio general pues captura los efectos directos e indirectos de cambios de política en los hogares rurales. Con el modelo se determinan los posibles impactos de diferentes escenarios de reforma comercial, de políticas de transición y de cambios en las condiciones de los mercados de productos y factores que podrían darse a raíz del DR-CAFTA, sobre las decisiones de producción y de consumo y sobre el bienestar económico de cada tipo de hogar.
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Machado, Fabiana. Decentralization and Accountability: The Curse of Local Underdevelopment. Inter-American Development Bank, junio de 2013. http://dx.doi.org/10.18235/0011496.
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Decentralization of provision of public services has been an important item in the agenda of developing countries. While some scholars and practitioners argue that decentralization is associated with improvements in provision due to higher accountability, others note its potential pitfalls. In particular, decentralization to local communities characterized by poverty, low levels of education, and inequality may lead to low accountability and higher susceptibility to political capture. This paper explores these dynamics empirically, taking advantage of the fact that in Brazilian municipalities primary education is provided by schools under municipal as well as under state management. The performance of these two types of school in the same municipalities is compared in terms of their levels of inputs and the efficiency of service delivery using non-parametric data envelopment analysis (DEA). The results suggest that there are indeed drawbacks to decentralization in municipalities where inequality is higher and education and political participation are lower.
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Kotula, Hannah. Valuing forest ecosystem services in New Zealand. Motu Economic and Public Policy Research, noviembre de 2022. http://dx.doi.org/10.29310/wp.2022.11.
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Society depends on services and benefits provided by ecosystems. Yet, many of our actions affect ecosystems in ways that undermine long-term human wellbeing. Although ecosystems provide many services to society, many of these services are not accounted for in land-use decisions. The concept of “ecosystem services” offers a framework for understanding our dependence on nature and can encourage decision makers to consider broader impacts of land-use decisions beyond short-term economic rewards. Furthermore, economic valuation of ecosystem services offers a potential strategy for including the value of ecosystem services in decision making. Here I describe several ecosystem service frameworks and outline how these frameworks can inform land-use decisions, with a particular focus on those involving forests. I then describe methods for valuing ecosystem services. Following this, I provide examples relating to forest ecosystem services and draw conclusions based on existing valuation studies in New Zealand. My intention is to convey how an ecosystem service approach could be used in New Zealand to capture benefits provided by ecosystems that are often not accounted for in land-use decisions.
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Lewan. PR-389-114503-R01 Leak Prevention in CO2 Pipeline Valves and Launches By Correct Seal Material Selection. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), septiembre de 2013. http://dx.doi.org/10.55274/r0010086.
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Pipeline Research Council International, Inc. (PRCI) required guidelines for pipeline valve stem seals in CO2 rich applications such as for enhanced oil recovery (EOR) and carbon capture and storage (CCS). In particular, guidance was needed to ascertain when standard O-rings may be used, when a switch to rapid gas decompression (RGD) resistant O-rings is recommended and when O-rings should be replaced by more robust energized lip seals and/or by more robust seal materials. The guidelines would interface with both NORSOK M 710 Rev. 3 and ISO 23936-2, and give specific details on procedures, steps and decisions that have to be taken when attempting to qualify seals for dense phase CO2 use. In order to develop these guidelines, two well established sealing compounds having proven RGD resistance were selected for study, along with two materials which were not known for their RGD resistance. RGD testing was performed on housed O-rings of each compound using 4 different gas compositions that cover an appropriate range of field conditions for CO2 applications.