Academic literature on the topic 'Couche diffuse'
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Journal articles on the topic "Couche diffuse"
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Touchard, G., P. Humeau, J. Borzeix, and H. Romat. "Mécanisme de formation de la couche diffuse à l'entrée d'une conduite de section circulaire." Revue de Physique Appliquée 22, no. 9 (1987): 1065–69. http://dx.doi.org/10.1051/rphysap:019870022090106500.
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Il Idrissi, A., G. Touchard, and H. Romat. "Étude de la formation de la couche diffuse apparaissant dans un liquide diélectrique s'écoulant dans un tube capillaire (Effet de la rugosité)." Journal of Electrostatics 19, no. 2 (May 1987): 215–18. http://dx.doi.org/10.1016/0304-3886(87)90010-6.
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Angrosino, Michael. "Health Policy and Applied Anthropology in the Catholic Church." Practicing Anthropology 18, no. 2 (April 1, 1996): 14–17. http://dx.doi.org/10.17730/praa.18.2.jk246763845428j5.
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Decisions about health care often reflect moral choices, and they are often couched today in the discourse of social justice that has diffused from the religious to the secular sphere of American society. Although thinking about health care technology and service delivery in terms of moral values is hardly novel, it is still relatively uncommon for an applied anthropologist to seek to understand and advocate for health care reform from within an organized religious body, as I do within the Roman Catholic Church.
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Amahmid, A., M. Hasnaoui, and P. Vasseur. "Etude analytique et numérique de la convection naturelle dans une couche poreuse de Brinkman doublement diffusive." International Journal of Heat and Mass Transfer 42, no. 15 (August 1999): 2991–3005. http://dx.doi.org/10.1016/s0017-9310(98)00223-3.
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Paoli, Bruno. "La diffusion de la doctrine nusayrie au IVe/Xe siècle d’après le Kitāb Khayr al-Sanī‘a du cheikh Husayn Mayhūb Harfūš." Arabica 58, no. 1 (2011): 19–52. http://dx.doi.org/10.1163/157005811x550282.
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AbstractLe Kitāb Khayr al-Sanī‘a fī mukhtasar tārīkh ġulāt al-šī‘a du šaykh Husayn Mayhūb Harfūš (1890-1959) consacre aux disciples d'al-Husayn b. Hamdān al-Hasībī (m. 358/969) et de Muhammad b. Alī l-Ğillī (m. 399/1009) de courtes notices biographiques qui nous fournissent de précieuses informations sur la diffusion de la doctrine nusayrie au IVe/Xe siècle: une diffusion à grande échelle, sur toute l'étendue de l'Orient musulman et dans toutes les couches de la société, y compris parmi les élites de l'époque, au prix d'un prosélytisme dont les nombreuses conversions de chrétiens et de juifs illustrent l'efficacité. Ces notices témoignent aussi de l'implantation précoce des «Nusayris» dans la montagne côtière de Syrie, prélude à une phase de repli et de regroupement de clans et de tribus d'origines diverses qui dura jusqu'au milieu du VIIe/XIIIe siècle et fut aussi une période d'intense activité de préservation du patrimoine: contrairement aux disciples d'al-Hasībī, qui s'attachèrent d'abord à diffuser la doctrine, ceux d'al-Ğillī firent surtout œuvre de transmetteurs et de copistes, mémorisant et recopiant les œuvres de leurs maîtres, comme celles des ġulāt des générations précédentes, au premier rang desquels figurait Muhammad b. Nusayr.
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Lundgren, Mia C., Jerry A. Molitor, Benjamin Spilseth, and Oyedele Adeyi. "A Fatal Case of Diffuse Alveolar Hemorrhage in the Setting of Systemic Lupus Erythematosus: A Case Report and Review of Noninfectious Causes of Acute Pulmonary Hemorrhage in Adults." Case Reports in Rheumatology 2021 (February 11, 2021): 1–7. http://dx.doi.org/10.1155/2021/6620701.
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Systemic lupus erythematosus (SLE) is an autoimmune connective tissue disease, characterized by autoantibody production and immune complex formation, that has the potential to affect virtually any organ. Pleuropulmonary involvement occurs in 50–70% and commonly manifests as pleuritis and pleural effusion. Diffuse alveolar hemorrhage (DAH) is a rare manifestation of SLE. Most cases of DAH occur in young adults with an underlying autoimmune disease such as systemic vasculitis or Goodpasture syndrome. SLE is typically lower on the list of initial differential diagnoses of DAH due to its rarity compared to other etiologies. We present a case of a patient with dyspnea on exertion, dry coughs, lower extremity edema, and intermittent periorbital edema who ultimately succumbed to respiratory failure secondary to DAH in the setting of SLE. The diagnosis of SLE was suspected clinically and confirmed at autopsy due to her rapid clinical deterioration. DAH requires prompt intervention, and management is guided by the underlying disease process. SLE is a potentially treatable disease; therefore, timely diagnosis is important in order to exclude other noninfectious causes of DAH (reviewed in this report) and to initiate appropriate therapy.
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Bertran, Pascal, Jean-Pierre Coutard, Bernard Francou, Jean-Claude Ozouf, and Jean-Pierre Texier. "Données nouvelles sur l’origine du lintage des grèzes : implications paléoclimatiques." Géographie physique et Quaternaire 46, no. 1 (November 23, 2007): 97–112. http://dx.doi.org/10.7202/032891ar.
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RÉSUMÉÀ partir de l'étude détaillée d'une grèze litée répondant à la définition granulo-métrique proposée par Guillien, les différentes hypothèses avancées concernant les processus de mise en place de ces dépôts ont été ré-examinées. Les données recueillies lors des observations de terrain, les résultats des analyses sédimentologiques et ceux de l'analyse micromorphologique ont permis de cerner le processus dominant conduisant à la stratification des grèzes. Le rôle majeur attribué au ruissellement par Guillien est remis en question par l'absence de figures d'incision, de granoclassements longitudinaux, de structures obliques ou entrecroisées. L'hypothèse congélifluxion-ruissellement de Journaux ne permet pas d'expliquer les granoclassements verticaux; par ailleurs, le ruissellement diffus ne peut seul aboutir à la formation d'une « table » bien marquée au sommet des lits gras. En revanche, Journaux et Francou font appel à la solifluxion pour la mise en place des lits gras. Le modèle andin de Francou qui privilégie la cryoreptation nous semble le mieux adapté pour expliquer le litage des grèzes charentaises. Les granoclassements verticaux, les contacts entre les lits, les figures sedimentaires observés dans le milieu andin ont été retrouvés dans les grèzes litées charentaises. Le mécanisme de la nappe-coulée a donc été retenu comme moteur essentiel de la stratogénèse. De ce fait, le contexte climatique d'élaboration des grèzes est caractérisé par la grande fréquence de cycles gel-dégel brefs, superficiels et des apports de neige faibles mais renouvelés fournissant l'eau nécessaire à une cryoclastie et à une cryoreptation actives. La formation des grèzes litées se situerait donc pendant les phases froides et humides qui ont été les plus durables au cours du dernier cycle glaciaire, la phase plus froide et plus sèche terminale ayant provoqué le remaniement du sommet de la grèze (fauchages, cryoturbations).
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Viney, Linda L., Beverly M. Walker, Betsy Lilley, Barbara Tooth, Pam Bell, and Sue Nagy. "The Quality of Life of Palliative Care Staff: A Personal Construct Approach." OMEGA - Journal of Death and Dying 28, no. 3 (May 1994): 201–17. http://dx.doi.org/10.2190/a7y9-0f7j-tlr2-9byn.
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Palliative care staff were compared with staff from burn and neonatal units, and with mature age general nursing trainees at the end of their training. Hypotheses, based on a personal construct model of their quality of life, sources of anxiety, and types of social interactions were tested. These tests were conducted by applying content analysis scales to their responses to an open-ended request in their interview schedule. The palliative care staff did express better quality of life, in terms of significantly less anxiety and depression, as well as more good feelings than the other staff groups. They showed, as predicted, significantly more anxiety about death, but less shame and diffuse anxiety. They also reported more helping and loving interactions but fewer influencing or vaguely defined, but shared interactions. The implications of these findings for the model and for the support of palliative care staff are considered.
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Collins, Charles O., and Charles D. Rhine. "Roadside Memorials." OMEGA - Journal of Death and Dying 47, no. 3 (November 2003): 221–44. http://dx.doi.org/10.2190/1654-01n2-2a3c-gq9c.
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Roadside memorials or descansos have diffused from a Mexican/Southwestern regional Hispanic hearth to increasingly draw the attention of motorists and public officials throughout the United States. In the current context, the authors' attention is on privately and spontaneously erected memorials placed at the sites of fatal events. Typically these result from automobile accidents, though not exclusively. The intent of the present article is three-fold: 1) to identify meaning and significance in the precise placement of contemporary markers; 2) to directly investigate the motivation and purposes of memorial/ descanso builders; and 3) to survey issues of traffic safety, highway maintenance, landscape or visual blight, and church/state relations arising from the placement and maintenance of these roadside memorials.
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Goodman, Marcene, Helen K. Black, and Robert L. Rubinstein. "Paternal Bereavement in Older Men." OMEGA - Journal of Death and Dying 33, no. 4 (January 1, 1996): 303–22. http://dx.doi.org/10.2190/ggxb-1ret-4ljb-cd1q.
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Styles of coping with the death of an adult child were explored in a study that examined the behavioral and affective aftermath of loss in older men. Twenty-five fathers aged sixty to eighty-eight who had lost an adult child were studied through ethnographic interviews based on life history review. Three general styles of adjustment to loss were identified. Men who described themselves and their careers in superlative terms appeared most likely to adjust well to the loss. These men tended to “conquer” the loss by intellectualizing it, psychologically relegating the loss to the periphery of daily life, or capitalizing on their self-esteem to reestablish control over life. A second group of men used avoidance, denial, or a dependence on others as primary agents of adjustment. While this latter group presented as only slightly less self-complacent than the above, they were less able to diffuse or appease accompanying feelings of helplessness through self-aggrandizement. For them, recovery from the death of a child seemed more tied to external than to self-affirming mechanisms. Immersion in second marriages, bereavement support groups, or religion became outlets for relief and sources of regeneration. Two men who candidly described their lives with regret and disappointment, constituted a third group. Lacking the conviction of self-worth that lead other men in the sample to triumph over the loss, they displayed no determination to rescue themselves or be rescued from grief. For both men, mourning was a continuing process that seemed to relate to the futility of unrealized self-potential as well as the loss of a child. Results suggest that, for men, narcissism may be a potent antidote for loss that can buffer, neutralize, and even erase the pain of losing a child.
Dissertations / Theses on the topic "Couche diffuse"
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Peverini, Luca. "Etude des procédés de croissance de couche et de décapage ionique par mesures de diffusion spéculaire et diffuse de rayons." Phd thesis, Université Joseph Fourier (Grenoble), 2005. http://www.theses.fr/2005GRE10022.
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Une nouvelle technique basée sur la diffusion des rayons X et un montage adapté ont été conçus et implémentés sur la ligne de lumière BM5 de l'ESRF. L'instrument permet l'étude in-situ et en temps réel de la rugosité d'une surface par diffusion en incidence rasante. L'interaction des rayons X avec la surface, analysée dans le cadre de la théorie des perturbations scalaire du premier ordre, permet d'exprimer les paramètres caractérisant une surface par sa densité spectrale de puissance. En final les valeurs de rugosité, de longueur de corrélation, de conformité de la rugosité, et les exposants propres aux processus de synthèse ont été obtenus. Les potentiels d'un tel instrument ont été vérifiés dans deux cas particuliers : le dépôt de couches minces par pulvérisation magnétron et le décapage par bombardement ionique. Les résultats expérimentaux obtenus ont été discutés par rapport aux modèles actuels décrivan la croissance des films minces et l'interaction des ions avec un solideA novel X-ray scattering technique and a dedicated apparatus have been conceived and realized at the optics beamline BM5 at the ESRF. The apparatus permits to study the surface roughness in-situ and in-real time via grazing incidence X-ray scattering. The interaction of X-rays with the surface was analyzed in the framework of the first order scalar perturbation theory expressing the surface's attributes through the power spectral density function. Information on the rms roughness, the correlation length, the roughness conformi and the scaling exponents characterizing the synthesis process could be extracted. The potential of the method was demonstrated for two particular cases : thin film deposition by magnetron sputtering and surface etching by ion beam bombardment. Finally, the obtained experimental results were discussed in the light of the present models of film growth an ion interaction with solids
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De, Vroey Laurent. "Modélisation des couches minces électriques dans les bio-microsystèmes." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2008. http://tel.archives-ouvertes.fr/tel-00762196.
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L'utilisation de systemes électromécaniques microstructures pour analyser et manipuler des solutions biologiques ou des cellules vivantes (bio-MEMS) à pris un essor considérable ces dernières années. Dans ce genre de dispositifs, I'utilisation de champs électriques est frequente que ce soit pour percer les membranes des cellules et effectuer une transfection de gènes par exemple (électroporation), pour les déplacer ((di )électrophorèse) ou agir sur Ie milieu dans lequel elles baignent (électro-hydrodynamique). La modélisation des phénomènes induits par ces champs électriques dans les solutions aqueuses est un probleme multi-physique et multi-échelle. Au deplacement des électrons s'ajoute en effet la migration des ions présents dans la solution. Ceux-ci se concentrent en particulier aux abords des électrodes formant des couche minces dont les paramètres évoluent de façon encore mal connue en fonction notamment des conditions d'alimentation. La thèse se concentre sur les applications électro-hydrodynamiques dans lesquelles une solution saline est mise en mouvement par des forces électriques agissant sur ses ions, concentrés dans des couches de charges minces, au voisinage des électrodes. Sont d'abord presentés les resultats experimentaux et des modèles simples du problème électromécanique dans Ie cas de structures 2D à électrodes coplanaires. Devant I'importance des écarts entre les résultats théoriques et expérimentaux, des modèles plus complets sont alors proposés et évalués. Malgré les ameliorations fournies par ces modèles, des écarts importants subsistent entre théorie et expérimentation, et une étude totalement découplée des aspects électriques et mécaniques est alors réalisée sur une structure 1D. Cette étude permet de mieux cerner Ies dependances de certains paramètres physiques vis-a-vis des conditions d'alimentation avec une comparaison systématique des résultats expérimentaux et des résultats de modèles circuits Iinéaires et non linéaires, au travers d'une approche fréquentielle par diagrammes de Bode et d'une approche temporelle par figures de Lissajous. II a ainsi pu être mis en évidence I'importance pratique potentielle de certains phénomènes rarement pris en compte dans des modèles globaux : saturation des couches minces, permittivité non constante, effets de bords, ... Des applications pratiques ont pu etre dégagées et testées experimentalement, dans Ie domaine des micro-mélangeurs. Outre ces développements, une brève étude est décrite, portant sur la modélisation des cellules et de leurs membranes extrêmement fines en regard des autres dimensions caractéristiques du systeme, dans la perspective par exemple d'applications en électroporation. Une autre étude est faite portant sur I'utilisation potentielle de méthodes numériques dites " sans maillage " pour ce type d'applications, I'accent étant mis sur Ia résolution du problème de Poisson dans des systèmes 2D.
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Gaombalet, Jérôme. "Le Gonflement des argiles et ses effets sur les ouvrages souterrains de stockage." Palaiseau, Ecole polytechnique, 2004. http://www.theses.fr/2004EPXX0009.
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Voarino, Philippe. "Lumière diffuse et microsphères multicouches : calculs et réalisations." Phd thesis, Aix-Marseille 3, 2004. http://tel.archives-ouvertes.fr/tel-00083581.
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Nous avons développé des codes de calcul basés sur la théorie de Mie, pour prédire la réponse angulaire et spectrale de microsphères revêtues d'empilements multicouches concentriques, diélectriques ou métalliques. L'influence des paramètres est tout d'abord analysée avec précision : effet de taille, effet du revêtement, tolérance sur le rayon... L'analogie avec les fonctions optiques classiques (antireflet, miroir, filtres, séparateurs...) a retenu notre attention, et l'on montre qu'elle existe jusqu'à des rayons de l'ordre de 3 Μm, valeur critique en dessous de laquelle les résonances prédominent. Une étude colorimétrique a également permis de quantifier nombre d'effets colorés spécifiques à ces sphères multicouches.La deuxième partie de notre travail a consisté en la réalisation des micro-composants. Pour cela nous avons entièrement mis au point une technologie de pulvérisation par faisceau d'ions (IBS), pour fabriquer des couches minces optiques métalliques ou diélectriques. Pour revêtir les microsphères, nous les animons d'un mouvement aléatoire conféré par une membrane vibrante. Les résultats montrent que notre procédé fonctionne très correctement pour une fabrication en série, ouvrant ainsi la porte à des poudres optiques interférentielles. Ensuite le problème de la caractérisation est traité à l'aide d'un diffusomètre laser et d'un spectro-diffusomètre, pour tenter de mesurer une sphère isolée ou des collections de microsphères.
De façon générale, ce travail trouve des applications dans la couleur et cosmétique, la visualisation, la furtivité et les télécom, le biomédical...
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Petitdidier, Nils. "Système d'imagerie pour la caractérisation en couches de la peau par réflectance diffuse." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAD048/document.
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Les travaux effectués au cours de cette thèse concernent le développement d’un instrument à faible coût et porté sur la personne permettant le suivi quantitatif des paramètres physiologiques de la peau in vivo et de manière non invasive. L’instrument est fondé sur la technique de Spectroscopie de Réflectance Diffuse résolue spatialement (srDRS). Cette technique fournit une quantification absolue des propriétés optiques endogènes d’absorption et de diffusion du tissu sondé et possède un potentiel pour la caractérisation de ces propriétés en couches de la peau.Afin de maximiser ce potentiel, notre approche repose sur l’utilisation d’un capteur matriciel placé en contact avec le tissu et permettant l’imagerie de réflectance diffuse à haute résolution spatiale. Les travaux présentés ici comprennent la spécification et la validation d’une architecture innovante permettant la mise en œuvre de l’approche proposée, l’implémentation d’un système porté sur la personne et bas coût basé sur cette architecture et l’évaluation des performances de ce système au travers d’expérimentations à la fois sur fantômes de peau et in vivo. Les résultats obtenus valident le potentiel de l’instrument développé pour le suivi quantitatif et non-invasif des propriétés de la peau. L’approche proposée est prometteuse pour l’analyse de milieux en couches tels que la peau et ouvre la voie au développement d’une nouvelle génération d’instruments portés sur la personne et bas coûts pour le suivi en continu des propriétés optiques des tissusThis work presents the development of a low-cost, wearable instrument for quantitative monitoring of skin physiological parameters toward non-invasive diagnostics in vivo. The instrument is based on the spatially resolved Diffuse Reflectance Spectroscopy (srDRS) technique, which provides absolute quantification of absorption and scattering endogenous properties of the probed tissue volume with a potential to discriminate between properties of individual skin layers. In the developed instrument, this potential is maximized by the use of a multi-pixel image sensor to perform contact, high resolution imaging of the diffuse reflectance. This study comprises the specification and validation of a novel srDRS system architecture based on the proposed approach, the implementation of this architecture into a low-cost, wearable device and the evaluation of the device performance both on tissue-simulating phantoms and in vivo. Results validate the potential of the instrument for the non-invasive, quantitative monitoring of tissue properties. The described approach is promising for addressing the analysis of layered tissue suchas skin and paves the way for the development of low-cost, wearable devices for continuous, passive monitoring of tissue optical properties
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Gilbert, Olivier. "Ellipsométrie sur champ sépculaire et diffus : théorie et expérience." Aix-Marseille 3, 2004. http://www.theses.fr/2004AIX30056.
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Nous avons développé un ellipsomètre basé sur une modulation élasto optique de la polarisation. Par comparaison au montage polariseur/analyseur tournant, les performances du banc, en terme de précision et de rapidité, ont été améliorées. Les mesures spéculaires ont permis de détecter la présence de contamination sur un composant, sans connaissance préalable de son indice de réfraction. Nous avons ensuite étendu la mesure du déphasage polarimétrique au champ diffus. Dans le cas de composants faiblement perturbés, il est possible de discriminer l'origine, surfacique ou volumique, de la diffusion. Nous avons mis en évidence les effets d'interférences surfaces/volumes, et la sensibilité à la décorrélation dans les multicouches. Enfin, pour les composants très hétérogènes, qui nécessitent de prendre en compte la dépolarisation, la mesure du déphasage polarimétrique du speckle résolu constitue une véritable signature et ouvre la porte aux problèmes de reconstruction en champ lointainAn ellipsometer based on an elasto optic modulation of polarization has been developped. Compare to a rotating polarizer setup, the performances, in term of accuracy and speed, have been significantly improved. Specular measurements make it possible to detect the presence of contamination on a component, without preliminary knowledge of its index of refraction. The measurement of polarimetric phase has been extended to the scattered field. In the case of components slightly heterogeneous, it is possible to discriminate the source of scattering (surface or bulk). We highlighted the effects of interferences between surfaces and bulks, and the sensitivity to cross-correlation effects in the multilayers. At last, in the case of very heterogeneous components, which require to take cross-polarization into account, the measurement of the polarimetric phase of the speckle reveals a specific signature of all components
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Andrianantoandro, Alain. "Etude par anémométrie laser d'une couche limite turbulente de diffuseur soumise à un champ acoustique intense." Aix-Marseille 2, 1992. http://www.theses.fr/1992AIX22071.
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Un resonateur acoustique situe a l'aval de la veine d'essai est alimente par l'ecoulement a nombre de mach egal a 0,12. La superposition des ondes remontant et descendant l'ecoulement, apres reflexion partielle au niveau du convergent situe a l'amont de la veine d'essai, produit dans celle-ci un champ acoustique d'environ 145 db, a la frequence de 190 hz. La reponse de la couche limite a cette excitation est caracterisee par l'amplification de l'amplitude et le dephasage de la vitesse acoustique par rapport a sa valeur sur l'axe de la veine d'essai. Cette reponse a ete etudiee dans une configuration de diffuseur symetrique permettant d'obtenir un gradient de pression adverse, ainsi qu'une couche limite epaisse. Le coefficient de reflexion des ondes acoustiques est sensiblement egal a 0,61. Une chaine anemometrique laser monodimensionnelle est utilisee et le volume de mesure est de l'ordre de 200 m. Le signal est fortement bruite au sein de la couche limite et un traitement approprie des donnees est developpe afin d'extraire la composante periodique de la vitesse et de determiner les grandeurs recherchees. Sans atteindre les valeurs elevees mesurees auparavant par l'anemometrie a fil chaud, on obtient neanmoins des amplifications de 2,5 accompagnees de fortes variations du dephasage. Ce phenomene pourrait etre explique par une modelisation de la turbulence tenant compte de la composante periodique de la tension de reynolds engendree par le champ acoustique. L'influence du son sur le point de recollement de la couche limite a l'aval d'un decollement provoque sur la paroi du diffuseur a ete etudiee
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Marsan, Aurélien. "Analyse et contrôle des écoulements en compresseur centrifuge avec diffuseur aspiré." Phd thesis, Ecole Centrale de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00965080.
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L'étude effectuée au cours de cette thèse s'inscrit dans le contexte du contrôle des écoulements en turbomachines. Suite à l'intérêt avéré de l'aspiration de la couche limite en compresseurs axiaux pour en améliorer les performances, elle vise à évaluer si cette méthodologie de contrôle est pertinente en géométrie radiale. Elle s'appuie pour cela sur un compresseur centrifuge transsonique Turbomeca. Le fonctionnement du compresseur est d'abord analysé sur la base de simulations numériques stationnaires et instationnaires chorochroniques, réalisées grâce au code de calcul elsA développé par l'Onera et en utilisant le modèle de turbulence k-l de Smith. La validité des résultats numériques est vérifiée par comparaison avec les données expérimentales disponibles : performances mono-dimensionnelles et signaux de pressions instationnaires. Ces données sont issues à la fois de la caractérisation expérimentale du compresseur effectuée par Turbomeca et de campagnes de mesures menées a l'ISAE, ou le compresseur est monté sur un banc de recherche dédié à l'étude des interactions entre le rouet et le diffuseur radial. L'analyse détaillée des résultats numériques révèle le développement d'un décollement de coin dans le diffuseur, entre la paroi moyeu et la face en dépression des aubages, lorsque le point de fonctionnement se rapproche du pompage. L'étude topologique du spectre du frottement pariétal permet d'en préciser le lieu et la structure, et de localiser les points singuliers ainsi que la ligne de séparation principale. En stationnaire, la croissance du décollement aboutit au décrochage du diffuseur, et compromet les performances de l'étage de compression et finalement la stabilité numérique. L'exploitation des résultats instationnaires permet de préciser le comportement temporel de l'écoulement : l'étendue du décollement fluctue sous l'effet du défilement des ondes de pression générées par l'interaction rouet-diffuseur, mais les trajectoires des particules fluides impliquées dans le décollement sont en accord avec les lignes de courant du champ de l'écoulement moyenné temporellement. Le décollement instationnaire est fixe, et sa topologie correspond à celle prévue par les simulations stationnaires. En particulier, le lieu du décollement est prévu de façon similaire par les modèles stationnaires et instationnaires. Une stratégie d'aspiration est ensuite développée sur la base de ces observations : une fente de prélèvement est positionnée au voisinage du col de séparation principal, dont le lieu correspond à celui du maximum du gradient de pression adverse stationnaire. Cette stratégie est implémentée au sein des modèles numériques stationnaires et instationnaires. En stationnaire, un prélèvement de 1 % de la valeur totale du débit traversant le rouet permet un contrôle total du décollement dans le diffuseur, et conduit à une augmentation significative de la plage de stabilité numérique. La réduction du débit de prélèvement à 0,3 % du débit total permet un contrôle partiel du décollement, et conduit également à une augmentation de la plage de stabilité numérique. En instationnaire, le décollement de coin initial est contrôlé. Mais les résultats mettent en évidence le rôle majeur joue par le défilement des ondes de pression le long des aubages du diffuseur. Celles-ci se renforcent au passage du col du diffuseur, et engendrent l'existence d'un important gradient de pression adverse instantané. Ce maximum du gradient de pression instantané conduit au développement d'un nouveau décollement de coin, en aval de la fente de prélèvement, et la plage de stabilité des calculs instationnaires n'est pas augmentée. Ces résultats mettent en évidence la possibilité d'agir sur les décollements se produisant dans les diffuseurs radiaux à l'aide de la technique d'aspiration de la couche limite. [...]
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Latour, Gaël. "Les couches picturales stratifiées : analyse et modélisation de l'aspect visuel." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2007. http://tel.archives-ouvertes.fr/tel-00239196.
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Une peinture est un matériau complexe composé de plusieurs couches picturales. Ce travail de recherche poursuit un double but : comprendre et modéliser l'aspect visuel d'un tel milieu stratifié et développer des méthodes non destructives permettant d'identifier les différents constituants présents dans une œuvre d'art. L'équation de transfert radiatif, résolue par la méthode de la fonction auxiliaire, permet de modéliser l'aspect visuel des couches picturales stratifiées. Cette modélisation est validée par comparaison avec des spectres expérimentaux de réflexion diffuse. Expérimentalement, la reconnaissance des pigments et des colorants à partir d'un appareil déjà opérationnel au laboratoire a été étendue à celle des constituants d'un mélange de pigments. De plus, la tomographie optique cohérente (OCT), développée au cours de cette thèse, permet d'imager les pigments et d'obtenir une information spectrale permettant d'envisager une identification non destructive des composants de couches picturales stratifiées.
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Trujillo, Tovar Maria Sonia. "Synthèse et caractérisation de matériaux ferroélectriques relaxeurs à base de Na1/2Bi1/2TiO3 (NBT)." Grenoble INPG, 2006. http://www.theses.fr/2006INPG0066.
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Ce travail s'inscrit dans un cadre de recherche plus large concernant des matériaux ferroélectrique relaxeurs à propriétés piézoélectriques qui suscitent une attention considérable, tant de la communauté scientifique que des industriels. La première partie de notre travail concerne la synthèse de couches minces. Nos résultats mettent en évidence la très grande difficulté de synthétiser des couches minces de Na1/2Bi1/2TiO3 par voie chimique. Cette difficulté est directement liée à la chimie complexe au cours du dépôt de bismuth et du sodium. Dans la deuxième partie de notre travail nous nous sommes particulièrement intéressé à la compréhension fondamentale de Na1/2Bi1/2TiO3 pur et dopé au Baryum (NBT-BT). Deux techniques de caractérisation ont été utilisées dans notre travail : d'une part la diffusion Raman et d'autre part la diffusion des rayons X, notamment la diffusion diffuse. Une première étude par diffusion Raman sous pression sur NBT-BT a été effectuée. L'analyse spectrale montre que NBT-BT évolue sous pression en deux régimes : un premier, où la pression force NBT-BT vers la structure de NBT (pc=1,8 GPa) et un deuxième où NBT-BT évolue comme NBT avec une nouvelle transition de phase vers 12 GPa. L'étude par diffusion des rayons X nous a permis de suivre l'évolution structurale en fonction de la composition chimique. En ce qui concerne la structure locale, nous avons mis en évidence que la diffusion diffuse évolue significativement avec la substitution en Baryum. Il est particulièrement intéressant de noter que cete évolution de la diffusion diffuse ne se fait pas uniquement en terme d'intensité mais évolue également dans sa distribution dans le réseau réciproqueThis work lies within the broader scope of research related to so-called relaxor ferroelectrics with currently attract considerable attention from both a fundemental and an application point of view. The first part of this work is related to the synthesis of thin films. Our results highlight the difficulty in synthesizing thin films of Na1/2Bi1/2TiO3 by chemical processes. This difficulty is directly related to a complex chemistry during the deposition of bysmuth and sodium. The second part of our work concerns the fundamental understanding of pure Na1/2Bi1/2TiO3 and NBT doped with Baryum (NBT-BT). Two techniques of characterization have been used in our work: Raman spectroscopy and X-tays scattering, in particular diffuse scattering. We have carried out the first high-pressure study of NBT-BT by Raman scattering. The spectral analysis shows that NBT-BT evolves under pressure in two regimes: a first, where the pressure forces NBT-BT towards the structure of NBT (pc=1,8 GPa) and a second where NBT-BT evolves like NBT with a new phase transition around 12 GPa. The study by X-ray scattering enable us to follow the structural evolution with the chemical composition. With regard to the local structure, we present evidence that the diffuse X-ray scattering evolves significantly with Barium substitution. It is particularly interesting to note that diffuse scattering does not only change in intensity but that its distribution in the reciprocal space does also change notably
Books on the topic "Couche diffuse"
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Aksamit, Timothy R. Diffuse Lung Disease. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199755691.003.0617.
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Diffuse lung disease includes a wide range of parenchymal lung diseases that have infectious, inflammatory, malignant, drug, occupational or environmental, and other causes. Although many identifiable causes are recognized, the cause of most cases of diffuse lung disease in many published series is idiopathic. The clinical course may be acute or prolonged and may progress rapidly to life-threatening respiratory failure with death, or it may be indolent over many years. In most instances, a differential diagnosis can readily be formulated by obtaining the medical history, with emphasis on the nature of the symptoms, duration, and pertinent environmental, occupational, drug, and travel exposures.
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Wilson, John W., and Lynn L. Estes. Select Opportunistic Infections in Adult Patients With HIV. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199797783.003.0143.
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•Risk factors: Ubiquitous organism; CD4 count <200/mcL; chronic corticosteroid or other immunosuppressive drug therapy•Clinical disease• Exertional dyspnea, fever, nonproductive cough, and chest discomfort that gets worse over days to weeks• Hypoxemia; chest radiographs vary (most commonly show diffuse bilateral, symmetrical interstitial infiltrate but may be relatively normal early in course and can have atypical presentation)...
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Cohen, Jeffrey A., Justin J. Mowchun, Victoria H. Lawson, and Nathaniel M. Robbins. A 30-Year-Old Male with Severe Cramps. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190491901.003.0029.
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Muscle cramps are a common complaint. When not associated with weakness, the course is usually benign but can still be frustrating to patients. Diffuse cramping may be indicative of a neuromuscular disorder. Cramps can be associated with a metabolic or endocrine disorder or medications. Normal nerve conduction studies and electromyography are reassuring for a benign cause of cramps. In motor neuron disease cramps are common. There are rare spontaneous activity syndromes associated with cramping. Stiff person syndrome is rare and usually has severe axial rigidity. It can be treated with immune modulating medications. McArdles disease has a prominent symptom of diffuse muscle cramping associated with activity. Unfortunately not always will a specific cause for cramps be discovered. Various treatment modalities are presented.
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Schroeder, Kristin, and Oren Becher. Pontine Gliomas. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199937837.003.0138.
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Pontine gliomas-also known as diffuse intrinsic pontine gliomas (DIPG)-primarily occur in children and typically present subacutely with a combination of cranial nerve palsies associated with long track signs including hyper-reflexia in the legs, positive Babinski responses, and cerebellar signs. On imaging they typically appear as intrinsic mass lesions within the pons. Treatment with radiation can prolong the course of from months to years but the tumors are rarely curable. Chemotherapy combined with radiation therapy targeted at specific signaling pathways has shown only modest impact on survival.
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Oscar-Berman, Marlene, Trinity A. Urban, and Avram J. Holmes. Effects of Alcoholism on Neurological Function and Disease in Adulthood. Edited by Kenneth J. Sher. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199381708.013.22.
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Alcoholism is associated with disparate and widespread negative consequences for brain anatomy and function. Consistent with a diffuse neurobiological profile, alcoholism is marked by a heterogeneous mix of cognitive and emotional abnormalities. Alcohol use disorders arise through diverse origins and follow an uncertain clinical course, with severity and consequences depending on many factors. The identification of specific alcoholism-related deficits is constrained both by methodological techniques employed and the distinct populations studied. To understand alcoholism-related alterations in brain structure and function, it is critical to consider the influence of contextual factors on clinical course. The optimal approach for understanding alcohol use disorders leverages a variety of scientific methodologies and clinical settings. The resulting confluence of data can provide evidence linking alterations in neurobiology with behavioral and neuropsychological effects of alcoholism. Critically, these data may help determine the degree to which abstinence and treatment facilitate the reversal of brain atrophy and dysfunction.
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Gabaccia, Donna R. Food, Mobility, and World History. Edited by Jeffrey M. Pilcher. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780199729937.013.0017.
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To determine how scholars have tackled the study of food as part of world histories, this article reviews research connecting the history of food with that of human mobility. It explores how and under what circumstances food practices "spread" or "diffuse" among human societies. It asserts that the study of food is becoming a more central theme in world history due to recent interest in mapping the links among the culturally distinct societies of the six continents over the course of human life on earth. Such histories offer a glimpse into the relationship of the general and particular in culinary culture. World histories indicate that trade, human migrations, and media are the mechanisms that allow particular foods, food practices, food technologies, and food knowledge to travel across space and time, and cultural boundaries to become general.
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Morgan-Owen, David G. The North Sea Guard. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198805199.003.0007.
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Between 1903 and 1907 the Admiralty had recognized that preventing a German invasion of the British Isles was likely to prove more problematic than is often accepted. These fears increased precipitously over the course of the following three years. In 1907 a top-secret committee of officers chaired by Captain Sydney Fremantle confirmed that a German landing of up to 80,000 men appeared eminently feasible under the Navy’s existing war plans. For political reasons Admiral Sir John Fisher was unwilling to inform the government of this fact, and set about using the Navy’s most modern warships—including HMS Dreadnought—in an audacious plan to diffuse the danger. At the same time the military authorities continued to prepare to send the Army to the Continent, increasing the pressure on the Navy to ensure the defence of British shores.
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Carr, Steven. Immigration, Race, and Ethnicity in American Film. Edited by Ronald H. Bayor. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199766031.013.026.
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The rise of the American motion picture corresponds to the influx of immigrants from Eastern and Southern Europe. Just as many of these immigrants initially settled in East Coast and Midwest cities, both movies and movie audiences emerged there as an urban phenomenon. Rather than view this phenomenon only in terms of the images that films of this era offered, this chapter proposes to move beyond a “reflection paradigm” of film history. Of course, film texts reflected immigrant, ethnic, and racial identities. But these identities also existed beyond the text, across movies and movie-going, and embedded within diffuse, multiple, and overlapping networks of imagined relationships. Using Bakhtin’s concept of the chronotope, this chapter recounts some preliminary case studies involving race, ethnicity, and immigration to explore how future research in this area might probe the cultural practices of movie-going among diverse audiences during the first half of the twentieth century.
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Castro, Guillermo. El negocio jurídico, la declaración de voluntad y el ordenamiento jurídico. Editorial Universidad Católica de Colombia, 2020. http://dx.doi.org/10.14718/9789585133310.2020.
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Uwe Wesel, professor of law at the Free University of Berlin, expressed in several of his writings an interesting thought: more than the law of obligations (Schuldrecht) the law of contracts (Vertragsrecht) is a better metadiscourse to reread and interpret the spectrum of The legal, which could even give an accurate account of the history of Western law. From the origins of the Greek civilization and to the Lisbon agreement, the contract was the institute that most connected the legal with the reasonableness, fairness, proportionality, justice and the conservative and protective sense of the community; of course also with the market economy and globalization. For this reason, this diffuse approximation of the contract and the legal business within western juridicity provides interesting inputs, such as inadvertent responses to how certain constitutional principles emerged? Or why do freedom and equality rights always entail obligations? under many others perspectives.
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Tausig, Benjamin. Bangkok is Ringing. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190847524.001.0001.
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Bangkok Is Ringing is an on-the-ground sound studies analysis of the political protests that transformed Thailand in 2010–11. Bringing the reader through sixteen distinct “sonic niches” where dissidents used media to broadcast to both local and diffuse audiences, the book catalogues these mass protests in a way that few movements have ever been catalogued. The Red Shirt and Yellow Shirt protests that shook Thailand took place just before other international political movements, including the Arab Spring and Occupy Wall Street. Bangkok Is Ringing analyzes the Thai protests in comparison with these, seeking to understand the logic not only of political change in Thailand, but across the globe. The book is attuned to sound in a great variety of forms. The author traces the history and use in protest of specific media forms, including community radio, megaphones, CDs, and live concerts. The research took place over the course of sixteen months, and the author worked closely with musicians, concert promoters, activists, and rank-and-file protesters. The result is a detailed and sensitive ethnography that argues for an understanding of sound and political movements in tandem. In particular, it emphasizes the necessity of thinking through constraint as a fundamental condition of both political movements and the sound that these movements produce. In order to produce political transformations, the book argues, dissidents must be sensitive to the ways that their sounding is constrained and channeled.
Book chapters on the topic "Couche diffuse"
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Pallud, Johan, and Emmanuel Mandonnet. "Quantitative Approach of the Natural Course of Diffuse Low-Grade Gliomas." In Tumors of the Central Nervous System, Volume 2, 163–72. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0618-7_18.
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Lemmen, Carsten, and Detlef Gronenborn. "The Diffusion of Humans and Cultures in the Course of the Spread of Farming." In Diffusive Spreading in Nature, Technology and Society, 333–49. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-67798-9_17.
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Meixensberger, J., A. Brawanski, M. Holzschuh, W. Ullrich, and I. Danhauser-Leistner. "Hemispheric CBF-Alterations in the Time Course of Focal and Diffuse Brain Injury." In Brain Edema VIII, 302–4. Vienna: Springer Vienna, 1990. http://dx.doi.org/10.1007/978-3-7091-9115-6_102.
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Tomei, G., E. Sganzerla, D. Spagnoli, P. Guerra, S. Gaini, and R. Villani. "Relationship Between Clinical Course, CT Scan and ICP in Post-Traumatic Diffuse Lesions." In Intracranial Pressure VII, 625–29. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-73987-3_162.
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Palash, Polina, and Virginie Baby-Collin. "Puzzling Social Protection across Several Countries: Opportunistic Strategy or Risky Compensation?" In IMISCOE Research Series, 177–96. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67615-5_11.
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AbstractIn a context of increasing mobility, the management of social protection issues from below may encompass several countries. The limited studies on this topic mainly frame migrants’ use of an extended transnational social-protection space as an opportunistic strategy aimed at increasing resources. This chapter analyses the cross-border arrangements of dual Ecuadorian-Spanish citizens coping with the recurrent crisis, adopting a socio-spatial perspective of circulation over the life course. Our findings show that families flexibly adapt to such destabilisations through a mechanism of diffuse circulation of support as compensation practices implying a risky accumulation of constraints and vulnerability. This contrasts with the framings on migrants’ opportunistic and strategic use of social-protection resources and with ‘the welfare magnet’ or ‘welfare tourism’ assumptions. The study draws on fieldwork among 36 transnational families investigated through a multi-sited ethnography in Spain, England and Ecuador in 2015–2016, with a partially matched sample.
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Shakya, Kanchan. "Linear and Nonlinear Double Diffusive Convection in a Couple Stress Fluid Saturated Anisotropic Porous Layer with Soret Effect and Internal Heat Source." In Advances in Mechanics and Mathematics, 429–48. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02487-1_27.
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Bourke, S. J. "Pulmonary amyloidosis." In Oxford Textbook of Medicine, edited by Pallav L. Shah, 4261–63. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198746690.003.0428.
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Pulmonary amyloidosis is characterized by the deposition of monoclonal immunoglobulin light chain (AL) amyloid protein locally or diffusely in lung tissue. Local amyloid deposits in the airways, produced by B-cell clones within local tissues, may cause stridor, wheeze, cough, and haemoptysis. Diffuse alveolar deposition can occur as a complication of systemic amyloidosis. Local deposits of amyloid in the larynx, trachea, or bronchi may require treatment by endoscopic interventions, with mechanical debulking by forceps resection or laser therapy. Stenting may also be used to maintain airway patency. Radiotherapy has also been deployed successfully, and in certain circumstances may be a better option with less risk of bleeding or recurrence. Systemic AL amyloidosis may be treated by chemotherapy, while diffuse alveolar amyloidosis has a poor prognosis, particularly because it is associated with cardiac and renal amyloidosis.
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Kim, Do Kyun, Lucian F. Dinu, and Chang Geun Kim. "Adoptability of E-Textbooks Featuring Educational Online Games." In Online Course Management, 2102–19. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-5472-1.ch107.
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Currently, the South Korean government is in the process of transforming school textbooks from a paper-based platform to a computer-based digital platform. Along with this effort, interactive online educational games (edu-games) have been examined as a potential component of the digital textbooks. Based on the theory of diffusion of innovations, this study examined how 4th, 5th, and 6th grade students perceive an interactive online edu-game and whether or not their communication attributes predict their willingness to diffuse the game. A hierarchical regression analysis revealed that four perceptions of the innovation – relevant advantage, complexity, compatibility, and observability – were statistically significant predictors of students' willingness to diffuse an online edu-game as indicated by the theory of diffusion of innovations, while only trialability was not. Based on these results, this study provides some implications for the diffusion of interactive online educational games as a potential component of the digital textbook.
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Mentor, Dominic. "EMxC3 = e&mLearning Cultivating Connected Communities." In Online Course Management, 1726–45. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-5472-1.ch090.
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This chapter covers the building of an ecological system to convert a workforce development organization to adopt blended electronic and mobile learning (e&mLearning) as part of its processes and practices. The chapter describes the organic approach to diffuse the technological innovation to cultivating supportive teaching and learning communities. Starting with the process of establishing and implementing an academic vision and strategy, the building of a blended, electronic, and mobile learning criteria taxonomy, as well as a technology integrated educational framework. The results and findings of the implementation of an LMS as the foundation of the e&mLearning vision is also shared followed by recommendations from current successes and organizational needs.
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Margaritopoulos, G. A., and A. U. Wells. "The lung in vasculitis." In Oxford Textbook of Medicine, edited by Pallav L. Shah, 4200–4207. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198746690.003.0418.
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Lung involvement in vasculitic disease can manifest as diffuse alveolar haemorrhage or as other pulmonary vasculopathy. Presenting features of diffuse alveolar haemorrhage include fever, weight loss, and other systemic symptoms in association with cough, breathlessness, and clinical signs suggestive of pneumonia. Haemoptysis may be present but is not invariable. A fall in haemoglobin over a day or longer suggests the diagnosis, and bronchoalveolar lavage is usually diagnostic. Other pulmonary vasculopathies present with breathlessness on exertion. Limited disease is generally treated with oral corticosteroid, given as monotherapy or in combination with a second-line immunosuppressive agent. Oral corticosteroid with either cyclophosphamide or rituximab are typically used to induce remission of generalized disease. Azathioprine or methotrexate with low-dose oral prednisolone are used to maintain remission.
Conference papers on the topic "Couche diffuse"
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López, A., B. Monje, D. Sánchez, R. Chacartegui, and T. Sánchez. "Effect of Turbulence and Flow Distortion on the Performance of Conical Diffusers Operating on Supercritical Carbon Dioxide." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94009.
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A rapidly growing interest in the supercritical carbon dioxide power cycle has been observed in the last years due to the superb performance of this system in concentrated solar and nuclear applications; a sample of this interest is the number of technical publications submitted to Turbo Expo in the last couple of years. As active members of the supercritical carbon dioxide (SCO2) community, the authors of this work have lately studied the fundamentals of SCO2 flows. The approach followed has nevertheless been different to that of most researchers since it has concentrated on simple devices rather than on an entire turbomachinery. Thus, recent contributions by the authors have shown that major differences are to be expected when air and SCO2 diffuse through simple conical divergent ducts at subsonic speeds, most of which derive from the very different characteristics and performance of the boundary layer when adverse pressure gradients are faced. In particular, the effects of geometry (i.e. divergence angle) and aerodynamic blockage on the static pressure rise coefficient of such a conical diffuser have been reported by the authors in recent technical works. This work presents the effects of other aerodynamic features of the inlet flow to a conical diffuser on the capacity to convert kinetic energy into static pressure. Two flow features are studied: (i) the distortion of the inlet velocity distribution and (ii) the turbulence intensity of the inlet flow. A parallel analysis is developed for air and SCO2 showing that the effects of both distortion and turbulence on diffuser performance are sensitive to the working fluid of choice.
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Wernicke, Caroline M., Birgit Geoerger, Olaf Witt, Christof Kramm, Stefan Burdach, and Irene Teichert von Luettichau. "Unusual Course of a Diffuse Midline Glioma Exhibits Upcoming Therapeutic Options through Novel Molecular Genetic Analyses." In Abstracts of the 45th Annual Meeting of the Society for Neuropediatrics. Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-1698205.
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Jobe, A. L., W. Cui, and L. A. Thomas. "30-Year-Old Female with Chronic Cough: A Presentation of Diffuse Idiopathic Pulmonary Neuroendocrine Cell Hyperplasia (DIPNECH)." In American Thoracic Society 2019 International Conference, May 17-22, 2019 - Dallas, TX. American Thoracic Society, 2019. http://dx.doi.org/10.1164/ajrccm-conference.2019.199.1_meetingabstracts.a6370.
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P. Holden, Edward. "Technology Transfer - The Human Side of IT." In 2003 Informing Science + IT Education Conference. Informing Science Institute, 2003. http://dx.doi.org/10.28945/2665.
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Information Technology (IT) is fundamentally a people business that involves integrating technology into human processes in order to solve problems and create new capacities. These integration skills are not often taught in undergraduate computing curricula. The Galisano College of Computing and Information Sciences at Rochester Institute of Technology (RIT) has been offering a course in the diffusion of innovations for several years now and considers the communication needed to diffuse an innovation core to IT’s mission. The course, called Technology Transfer, is the study of the "flow" of technology from its creation through adoption to implementation and eventual effects. Our BS in Information Technology has one of the few courses that address these issues directly. Many students are skeptical of the reality of organizational life and fail to understand the way that change actually occurs. The course provides a framework by which students can interpret and understand their roles as change agents in the organization. This paper provides an overview of RIT's Technology Transfer course, explains its rationale within the curriculum and its contribution to professional practice. It also discusses some of the techniques used in teaching these skills. The paper concludes with feedback on the value of the course to our graduates.
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Sato, Yozo, Tomohisa Baba, Katsuyuki Higa, Ryota Ootoshi, Ryota Shintani, Tsuneyuki Oda, Hideya Kitamura, et al. "Usefulness and safety of transbronchial lung cryobiopsy for reassessment of treatment in the clinical course of diffuse lung disease." In ERS International Congress 2020 abstracts. European Respiratory Society, 2020. http://dx.doi.org/10.1183/13993003.congress-2020.745.
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Nokes, Timothy, and Jijo John. "Chronic Cough, Tumor And Tumorlet: A Case Of Bronchoalveolar Cell Carcinoma With Diffuse Idiopathic Pulmonary Neuroendocrine Cell Hyperplasia." In American Thoracic Society 2011 International Conference, May 13-18, 2011 • Denver Colorado. American Thoracic Society, 2011. http://dx.doi.org/10.1164/ajrccm-conference.2011.183.1_meetingabstracts.a3841.
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Zhao, Jiayi, Guang Xi, Zhiheng Wang, and Yang Zhao. "The Unsteady Pre-Stall Behavior of the Spike-Type Rotating Stall Within an Airfoil Vaned-Diffuser." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76145.
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The spike-type rotating stall (RS) inception inside the vaned-diffuser, which seriously restricts the performance range and brings the problems of blade fatigue, still seems to be a ‘mystery’ since its randomness. The paper intends to explain the mechanisms of this stall inception. To quantitatively assess the critical unsteady behavior to the initiation of RS inception, the transient measurement characterizes the process falling into the RS through the parameter of ‘blade passing irregularity’. The underlying vortex disturbance, related to the growing of the flow complexity and the final spike-type precursor, is further revealed by the full-annulus simulation. The results show the propagation principle of the vortexes from the design to the stall inception point, reflected by the distribution of ‘blade passing irregularity’. The performance change of different sub-components due to the vortex behavior is presented. At the RS limit, the sudden ramp-up of the ‘blade passing irregularity’ near the leading edge (LE), accompanied with the drop of the static pressure rise in the sub-component between the semi-vaneless and throat, corresponds to the spike-type inception in the form of a clockwise vortex connecting the suction side of the diffuser vane and the pressure side of the adjacent vane. Besides, when approaching the spike-type inception point, the couple effect of the growing potential of the diffuser vane and the enhanced vortex disturbance at the impeller outlet degrades the diffuser inlet flow.
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Menon, Prahlad G., Srilakshmi M. Adhyapak, and Kiron Varghese. "Regional Vascular Characterization of Ectatic Coronary Arteries From Fluoroscopy." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65510.
Full textAbstract:
Coronary artery ectasia is designated as abnormal focal dilatation of segments of the coronary artery and less frequently or diffuse dilatation along the entire coronary artery. In this study, we describe an image processing pipeline for automatic segmentation and centerline characterization from conventional X-ray angiography images. Two patients presenting with acute coronary syndrome and coronary artery ectasia are examined. Fluoroscopic views showing left and right coronary arteries were automatically quantified for vascular centerlines and arterial centerlines are rendered color-coded plots of regional vascular radius, to objectively characterize patient-specific regional vascular dilatation. Ectasia was found to be most pronounced in the proximal and mid-coronary segments and occurred preferentially in the areas of high curvature of the coronaries, along their course over the epicardial surface of the heart.
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Xu, Kai, and Wen-Qiang Lu. "The Double-Diffusive Convection in the Process of Water Mist Fire Suppression." In ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/ht2008-56424.
Full textAbstract:
In the research of the mechanism of water mist fire suppression, thermal buoyancy has important effects on smoke movement and temperature distribution, but the effects of the smoke diffusion are less considered. In this paper, a computational method couple dual reciprocity boundary element method (DRBEM) with finite volume method (FVM) is developed to study the thermal and smoke diffusion effects on the smoke movement, temperature and CO2 concentration distribution. And the interaction between the smoke and a water spray is calculated using FVM with the PSIC scheme. The DRBEM is employed to calculate the inner temperature of the droplet and radius variation, and the results show that when the droplet radius less than 1mm, the uniformly temperature assumption is reasonable. Numerical results also show the gradients of temperature and smoke concentration drive double-diffusive convection have different effects on the smoke temperature and CO2 concentration with and without water spray.
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Yuan, Kang, and Shujiang Geng. "Diffusion Simulation in SUS 430 Stainless Steel Interconnect with a MnCu Coating at 800°C." In ITSC2021, edited by F. Azarmi, X. Chen, J. Cizek, C. Cojocaru, B. Jodoin, H. Koivuluoto, Y. C. Lau, et al. ASM International, 2021. http://dx.doi.org/10.31399/asm.cp.itsc2021p0522.
Full textAbstract:
Abstract (MnCu)3O4 spinel coatings are good candidates for Cr-positioning protection on stainless steel interconnect. The spinel coatings can be formed by sputtering MnCu followed by a hot oxidation treatment. To understand how the elements diffuse in the MnCu-steel system, a homogenization diffusion-couple model was built with consideration for Mn oxidation at the coating surface. According to the simulation, the diffusion of Fe from the steel substrate to the MnCu coating occurred while Cr was almost trapped under the MnCu coating. Cu-rich metallic phase formed under the Mn-oxide layer early in the process. The solid solubility of Cr in such Cu phase was very low which can function as a Cr blocker so that Cr external oxidation can be inhibited. The inward diffusion of Mn from the coating to the substrate was caused by the formation of a Mn concentration peak at the interface which, based on thermodynamic simulations, was probably due to the dissolution of Mn with Fe and Cr.