Littérature scientifique sur le sujet « Pressione centrale »
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Articles de revues sur le sujet "Pressione centrale"
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Cenere, Samantha, et Panos Bourlessas. « Di cosa parliamo quando parliamo di foodification ? Riflessioni a partire da Porta Palazzo a Torino ». RIVISTA GEOGRAFICA ITALIANA, no 4 (décembre 2022) : 61–80. http://dx.doi.org/10.3280/rgioa4-2022oa14997.
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L'apertura di un food hall del brand Mercato Centrale e di nuovi spazi dedicati al consumo di cibo nell'area di Porta Palazzo a Torino è stata interpretata da alcuni residenti, accademici e commentatori locali come possibile veicolo di gentrificazione commerciale. L'area, caratterizzata dalla presenza di uno storico mercato e da condizioni di vulnerabilità socioeconomica diffusa, è investita da processi di trasformazione che sembrano in linea con quella foodification che la letteratura individua in zone dove nuove geografie del consumo di cibo esercitano una ‘pressione di espulsione' verso la popolazione a basso reddito locale. Tuttavia, l'articolo mostra come un'analisi più attenta dei processi in corso evidenzi, da un lato, la capacità di fattori contestuali di esercitare una ‘resistenza' verso la trasformazione e, dall'altro, i limiti della foodification sia come processo di trasformazione urbana che produce gentrificazione sia come concetto analitico
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Basciani, Alberto. « Tra politica culturale e politica di potenza. Alcuni aspetti dei rapporti tra Italia e Albania tra le due guerre mondiali ». MONDO CONTEMPORANEO, no 2 (décembre 2012) : 91–113. http://dx.doi.org/10.3280/mon2012-002004.
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Durante gli anni Venti e Trenta la politica estera fascista fece dell'Albania uno degli obiettivi piů importanti dell'espansione politica, economica e culturale dell'Italia nel Sud-Est dell'Europa. Il saggio, con l'ausilio di molti documenti inediti provenienti dall'Archivio del ministero degli Affari esteri e dall'Archivio Centrale dello Stato, analizza alcune delle principali direttrici della politica estera e della politica culturale italiana nel paese adriatico. Nonostante i tentativi di re Zog di conservare dei margini di autonomia, a partire dalla metŕ degli anni Trenta la pressione italiana non fece altro che aumentare: cospicui prestiti finanziari, aiuti militari, aumento del numero delle scuole italiane, imposizione della lingua italiana quale materia obbligatoria di insegnamento, il ricorso massiccio alla corruzione, che non risparmiň neppure il sovrano albanese e la sua cerchia, furono i metodi che il regime fascista utilizzň per aumentare la propria influenza politica e la capacitŕ di ingerenza negli affari interni albanesi. Il fine apertamente dichiarato da Ciano era quello di ottenere l'annessione del paese vicino quando la situazione internazionale avesse reso possibile l'aggressione
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Rousset, D., B. Riu-Poulenc et S. Silva. « Monitorage hémodynamique dans le SDRA : que savoir en 2018 ». Médecine Intensive Réanimation 27, no 2 (mars 2018) : 161–71. http://dx.doi.org/10.3166/rea-2018-0019.
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Environ deux tiers des patients atteints de syndrome de détresse respiratoire aiguë (SDRA) présenteront une instabilité hémodynamique avec recours aux vasopresseurs. Sous ventilation mécanique, la diminution de précharge du ventricule droit (VD) suite à l’augmentation de la pression pleurale et l’augmentation de la postcharge du VD secondaire à l’élévation de la pression transpulmonaire seront des phénomènes exacerbés en cas de SDRA. Les risques encourus sont une diminution du débit cardiaque global et l’évolution vers un cœur pulmonaire aigu (CPA). Le contrôle de la pression motrice, de la pression expiratoire positive et la lutte contre l’hypoxémie et l’hypercapnie auront un impact autant respiratoire qu’hémodynamique. L’échographie cardiaque tient un rôle central au sein du monitorage hémodynamique au cours du SDRA, à travers l’évaluation du débit cardiaque, des différentes pressions de remplissage intracardiaques et le diagnostic de CPA. Le cathéter artériel pulmonaire est un outil de monitorage complet, indiqué en cas de défaillance cardiaque droite ou hypertension artérielle pulmonaire sévère ; mais le risque d’effets indésirables est élevé. Les moniteurs utilisant la thermodilution transpulmonaire permettent un monitorage du débit cardiaque en temps réel et sont d’une aide précieuse dans l’évaluation du statut volumique. L’évaluation de la précharge dépendance ne doit pas s’effectuer sur les variabilités respiratoires de la pression pulsée ou du diamètre des veines caves, mais à travers l’épreuve de lever de jambe passif, le test d’occlusion télé-expiratoire ou encore les épreuves de remplissage titrées.
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Pasche, Feihl, Liaudet et Waeber. « Mesure non-invasive de la pression artérielle centrale : comment et pourquoi ? » Praxis 96, no 29 (1 juillet 2007) : 1137–40. http://dx.doi.org/10.1024/1661-8157.96.29.1137.
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Jusqu'à ce jour, la pression artérielle a toujours été mesurée au niveau huméral par sphygmomanométrie. Il existe pourtant depuis quelques années un outil non invasif permettant d'estimer la pression régnant dans l'aorte. Cela est rendu possible grâce à la mesure par tonométrie d'aplanation de l'onde de pouls au niveau de l'artère radiale, avec conversion ultérieure en une onde de pression centrale par une méthode mathématique (fonction de transfert). Cette mesure peut nous renseigner au mieux sur la pression à proximité des organes cibles, une pression influencée par les ondes de réflexion connues pour augmenter la pression systolique en cas de compliance artérielle diminuée. De plus certaines études récentes montrent que pour une pression périphérique identique, des traitements antihypertenseurs différents n'ont pas le même impact sur la pression systolique centrale.
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Lantelme, Pierre, et Pierre-Yves Courand. « Mesure de la pression artérielle centrale : intérêt clinique ». La Presse Médicale 40, no 7-8 (juillet 2011) : 700–706. http://dx.doi.org/10.1016/j.lpm.2011.01.030.
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Lichtenstein, D., et F. Jardin. « Calibre de la veine inférieure et pression veineuse centrale ». Réanimation Urgences 5, no 4 (janvier 1996) : 431. http://dx.doi.org/10.1016/s1164-6756(96)80129-0.
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Siebert, Horst. « La Banque centrale européenne doit être protégée contre les pressions politiques ». Commentaire Numéro 59, no 3 (1 octobre 1992) : 725–31. http://dx.doi.org/10.3917/comm.059.0725.
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Villanueva, Antonio, et Jacques Imbernon. « Réalité et contraintes d'un corridor biologique dans la zone centrale du Mexique ». BOIS & ; FORETS DES TROPIQUES 318, no 318 (1 décembre 2013) : 41. http://dx.doi.org/10.19182/bft2013.318.a20517.
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Le Valle Central (zone centrale) du Mexique est un espace prioritaire pour la conservation de la biodiversité du fait du haut degré d'endémisme des espèces de faune et de flore présentes. Dans cette zone où se situent plusieurs aires naturelles protégées, les autorités fédérales du Mexique envisagent la création d'un corridor biologique allant du parc Mariposa Monarca à à celui du Popocatepelt. Or, le Valle Central fait l'objet de pressions anthropiques fortes qui sont dues aux activités minières et agricoles et à l'étalement urbain des grandes conurbations. Dans cet espace, ces pressions entraînent la fragmentation du couvert forestier et la diminution de la connectivité des écosystèmes naturels. L'étude présente une analyse à l'échelle régionale de la réalité du corridor biologique du Valle Central qui permettrait de relier les aires naturelles protégées. Dans un premier temps, la fragmentation du couvert forestier et arbustif a été quantifiée par des indices morphologiques issus de la théorie de l'écologie du paysage. Ensuite, un modèle de percolation est utilisé pour estimer la connectivité de ces espaces naturels et proposer une délimitation objective du corridor biologique. L'intérêt particulier de cette étude résulte de l'intégration de différents indices d'analyse du paysage révélant l'état réel du corridor biologique du Valle central du Mexique. L'étude met en évidence les espaces les plus sensibles pour la mise en oeuvre et la durabilité de ce corridor, ce qui exigera des politiques publiques volontaristes et bien ciblées.
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Kawanishi, Hirosuke, et Ross Mouer. « Le mouvement syndical au Japon. Quel avenir ? » Sociologie et sociétés 30, no 2 (2 octobre 2002) : 95–112. http://dx.doi.org/10.7202/001379ar.
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Résumé Cet article part du constat à l’effet que le taux de syndicalisation a chuté entre 1975 et 1996, au Japon. Les auteurs soulignentle fait que l’impact de la technologie et la pression en faveur de l’efficacité sont deux facteurs importants de la segmentationdu marché du travail en trois groupes, soit la main-d’oeuvre centrale, la main-d’oeuvre semi-centrale et la main-d’oeuvre périphérique.Ils indiquent aussi que suite à la fusion des deux organisations syndicales centrales à la fin des années 1980, ladynamique de compétition idéologique qui prévalait dans les années 1960 et 1970, a disparu. D’après les auteurs, le syndicalismed’entreprise est devenu de plus en plus « aristocratique » et a négligé les intérêts d’un grand nombre de simples salariésappartenant à la main-d’oeuvre périphérique. Ils prévoient que le taux de syndicalisation va continuer à baisser à moins que desmesures ne soient prises pour s’occuper de ces salariés et du groupe en émergence des salariés appartenant à la main-d’oeuvresemi-centrale (les techniciens et les professionnels).
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Noel, Robert. « La durée de vie des centrales nucléaires à eau sous pression ». Revue Générale Nucléaire, no 6 (novembre 1986) : 492–502. http://dx.doi.org/10.1051/rgn/19866492.
Texte intégralThèses sur le sujet "Pressione centrale"
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GRILLO, ANDREA. « Non-invasive evaluation of myocardial supply-demand balance from the analysis of pulse waveform : from validation to clinical application ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2019. http://hdl.handle.net/10281/241149.
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La valutazione del bilancio tra l'apporto e la domanda di ossigeno nel miocardio è utile per predire e diagnosticare l'ischemia miocardica e l'infarto miocardico di tipo 2, condizioni che rappresentano una parte crescente del carico sanitario delle malattie cardiovascolari e la cui incidenza è in rapido aumento a causa dell’invecchiamento. Nella sua valutazione originale, ottenuta mediante registrazioni invasive, questo equilibrio è calcolato come il rapporto tra l'apporto di ossigeno, definito come l'area tra la pressione aortica e quella ventricolare sinistra durante la diastole (indice diastolico di pressione-tempo) e il consumo di ossigeno, definito come l'area sotto la curva di pressione durante la sistole (indice sistolico di pressione-tempo). Questo rapporto è chiamato SEVR (Subendocardial Viability Ratio) e può anche essere calcolato dall'analisi dell'onda di pressione centrale ottenuta non-invasivamente dalla tonometria arteriosa carotidea, dividendo le aree tra le curve di pressione diastolica e sistolica. La valutazione non invasiva convenzionale del SEVR mediante tonometria arteriosa è influenzata da alcune limitazioni metodologiche, che sono l'esclusione dal calcolo del tempo di contrazione isovolumetrico nell'indice sistolico pressione-tempo e l'esclusione della pressione diastolica ventricolare sinistra dall'indice diastolico pressione-tempo. Inoltre, la calibrazione dell'onda di pressione centrale derivata dalla tonometria carotidea può essere influenzata dal modo di calcolare la pressione arteriosa media dalla pressione arteriosa brachiale, che è necessaria per scalare la forma d'onda centrale. Questa tesi presenta una serie di studi volti a superare queste limitazioni, al fine di elaborare una forma corretta del SEVR e di validarlo contro la sua controparte invasiva e come un predittore clinico.
Viene presentata una metodologia per calcolare in modo affidabile gli intervalli di tempo sistolico (tempo di contrazione isovolumetrica e periodo pre-eiettivo) da tonometria arteriosa con ECG, eseguita a livello carotideo e femorale, e viene quindi applicata in soggetti con o senza malattia cardiovascolare. È stata quindi affrontata la questione del calcolo della pressione arteriosa media dalla pressione arteriosa brachiale, in quanto è stata evidenziata una considerevole variabilità interindividuale e intraindividuale nel fattore di forma della pressione brachiale, nella popolazione generale di diverse età e nei pazienti ipertesi. L'approccio migliore per la calibrazione della pressione centrale non invasiva risiede nell'integrazione delle forme d'onda di pressione o, quando non applicabile, nell'uso di un algoritmo appropriato per il calcolo del fattore di forma brachiale. È stata quindi dimostrata una buona correlazione del SEVR determinato in modo invasivo, in pazienti sottoposti a cateterismo cardiaco, con il nuovo SEVR non invasivo calcolato mediante tonometria arteriosa e corretto considerando i tempi sistolici e la pressione diastolica ventricolare sinistra. Un'equazione per la stima della pressione diastolica ventricolare sinistra è stata derivata da parametri non invasivi della tonometria arteriosa e dai dati invasivi. Il nuovo SEVR è stato infine applicato nella coorte PARTAGE, un ampio studio di popolazione di individui di età maggiore di 80 anni. SEVR è risultato essere un predittore indipendente della mortalità totale nei soggetti anziani. In questa popolazione si può considerare un valore soglia di 100 per il SEVR.
In sintesi, è stata creata e validata clinicamente una nuova formulazione di un indice (SEVR) per la valutazione del bilancio tra domanda e offerta di ossigeno al miocardio, ottenibile mediante tonometria arteriosa non invasiva.The evaluation of the balance between oxygen supply and demand in the myocardium is useful for predicting and diagnosing myocardial ischemia and type-2 myocardial infarction, conditions that represent a growing part of the health burden of cardiovascular disease, and whose incidence is rapidly increasing due to an ageing population. In its original assessment by invasive registrations, this balance is calculated as the ratio between the oxygen supply, defined as the area between the aortic and left ventricular pressures during diastole (diastolic pressure-time index), and the oxygen consumption, defined as the area under the pressure curve during systole (systolic pressure-time index). This ratio is called SEVR (Subendocardial Viability Ratio) and may also be calculated from the analysis of the non-invasively determined central pressure wave obtained by carotid arterial tonometry, by dividing areas between the diastolic and systolic pressure curves. The conventional non-invasive assessment of SEVR by arterial tonometry is affected by some methodological limitations, that are the exclusion from the calculation of isovolumetric systolic time in the systolic pressure-time index and the exclusion of left ventricular diastolic pressure from diastolic pressure-time index. Moreover, the calibration of central pressure wave derived from carotid tonometry can be affected by the way of calculating mean arterial pressure from brachial cuff blood pressure, which is necessary for scaling the central waveform. This thesis presents a series of studies conducted to overcome the limitations mentioned above, in order to elaborate a corrected form of the SEVR and to validate it against its invasive counterpart and as a clinical predictor. A methodology to reliably calculate the systolic-time intervals (isovolumetric ejection time and pre-ejection period) from ECG-gated arterial tonometry performed at the carotid and femoral levels, is presented and applied in subjects with or without cardiovascular disease. The issue of calculation of mean arterial pressure from brachial cuff blood pressure was then addressed, as a considerable interindividual and intraindividual variability in brachial pressure form-factor was evidenced in general population of different ages and in hypertensive patients. The best approach for calibration of non-invasive central blood pressure waveform resides in the integration of pressure waveforms, or, when not applicable, in the use of an appropriate algorithm for calculation of brachial form factor. A good correlation of the invasively determined SEVR, in patients undergoing cardiac catheterization, was then demonstrated with the new non-invasive SEVR calculated by arterial tonometry and corrected by considering systolic time intervals and the left ventricular diastolic pressure. An equation for the estimation of left ventricular diastolic pressure was derived from non-invasive parameters of arterial tonometry and the invasive data. The new SEVR was finally applied in the PARTAGE cohort, a large population study of individuals 80 years of age and older living in nursing homes. SEVR was found to be an independent predictor of total mortality in the elderly subjects. A threshold value for SEVR of 100 may be considered in this population. In summary, a new formulation of an index (SEVR) for the evaluation of myocardial supply-demand balance from non-invasive arterial tonometry was created and clinically validated.
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GUIGLIO, ACHACHE CLAIRE. « Etude mathematique de la duree de variation de concentration d'un produit cardio-vaso-actif perfuse sur un catheter central, lors d'une manoeuvre faisant varier le debit de perfusion : alterations hemodynamiques chez les malades a risque ». Lyon 1, 1990. http://www.theses.fr/1990LYO1M050.
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Hoÿm, de Marien Luc de. « Évolution pression-température-temps des unités varisques de haute-pression de l'est du Massif Central : implications géodynamiques ». Thesis, Rennes 1, 2019. http://www.theses.fr/2019REN1B056.
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La chaîne varisque en France a été interprétée comme une chaîne de collision paléozoïque où l’essentiel des déformations et du métamorphisme résultent de l’épaissi-ssement crustal et de la relaxation thermique qui s’ensuit. L’analyse des relations entre métamorphisme et déformation au sein des massifs d’orthogneiss (principalement du Massif Central) et la datation du métamorphisme de haute pression d’éclo-gites mafiques démontrent : (i) le caractère précoce du métamorphisme de haute température reflété par la fusion partielle des éclogites au pic de pression à ~363 Ma ; (ii) l’exhumation et le refroidissement rapide des roches après le pic de pression datés à ~353 Ma ; (iii) le caractère rétrograde de l’essentiel des déformations des orthogneiss. Le métamorphisme et les déformations sont finalement interprétés dans le cadre d’un changement de dynamique de la zone de subduction suite à l’entrée en subduction de lambeaux de croûte continentale plutôt que dans celui d’une collision continentale succédant à la subduction océanique initialeThe Variscan belt in France is interpreted as a collisional orogen where crustal thickening and subsequent thermal relaxation account for most of the metamorphic and structural record. Detailed analysis of the relationships between metamorphism and deformation of ortho-gneisses, as well as petrologically constrained geochronology of mafic eclogites reveal : (i) an early high-temperature metamorphism demonstrated by partial melting of the eclogites close the peak P–T conditions at ~363 Ma; (ii) subsequent fast decompression followed by cooling dated at ~353 Ma; (iii) the retrograde metamorphic character of the deformation of most orthogneisses. The metamorphic and structural record are inferred to result from a switch of the dynamics of the subduction zone at the onset of subduction of small continental ribbons rather than from continental collision after the initial oceanic subduction
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LAZARTIGUES, ERIC. « Controle central et regulation de la pression sanguine arterielle par les systemes cholinergiques centraux. Approche pharmacologique ». Toulouse 3, 1999. http://www.theses.fr/1999TOU30135.
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L'acetylcholine, impliquee dans les processus de memorisation et mise en cause dans la maladie d'alzheimer, intervient egalement dans la regulation centrale de la pression sanguine arterielle (psa). Au cours de ce travail, nous avons precise les mecanismes physiopathologiques responsables de son implication dans les mecanismes d'elevation de la psa et de l'hypertension arterielle, chez le chien, le rat et l'homme. Chez l'animal normotendu, l'administration centrale ou peripherique d'agents cholinomimetiques (acetylcholine et inhibiteurs de l'acetylcholinesterase) engendre une augmentation de la psa, associee a une bradycardie. Les recepteurs cholinergiques impliques dans l'elevation de psa sont de type muscarinique puisque cet effet presseur est antagonise par l'atropine. D'autre part, l'absence de modification apres administration intraveineuse de methylatropine (antagoniste des recepteurs muscariniques peripheriques) confirme l'origine centrale de cette reponse pressive. Cette mise en jeu des recepteurs muscariniques centraux se traduit a la peripherie par une augmentation du tonus orthosympathique, revelee par le dosage des catecholamines plasmatiques et l'utilisation d'antagonistes des recepteurs vasculaires 1 adrenergiques. Le dosage des taux plasmatiques de vasopressine et l'utilisation d'antagonistes des recepteurs vasculaires v 1 a temoignent egalement de la liberation de vasopressine. Le sous-type de recepteurs muscariniques centraux, implique dans la reponse cholinergique pressive est majoritairement de type m 2 chez le rat et m 1 chez le chien. Chez le chien, les recepteurs cholinergiques centraux ne semblent pas impliques dans l'arc baroreflexe mais exercent un effet modulateur sur ce dernier. Chez l'animal hypertendu, la reponse pressive est majoree chez le rat spontanement hypertendu (sh) et minoree chez le chien hypertendu-obese. D'autre part, chez le rat sh des modifications des recepteurs centraux de type m 1, en terme d'expression ou d'affinite, semblent etre a l'origine de l'hypersensibilite de cette souche aux agents cholinomimetiques. Chez l'homme, les posologies de tacrine utilisees (40 mg per os) n'ont pas permis de retrouver ces resultats.
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LEPAUMIER, FABIENNE. « Regulation centrale de la pression arterielle et ligands endogenes apparentes a l'imidazoline ». Strasbourg 1, 1990. http://www.theses.fr/1990STR15054.
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Lotout, Caroline. « Âge, durée et enregistrement du métamorphisme de haute pression dans le massif Central ». Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S128/document.
Texte intégralRésumé :
Les processus de subduction sont une étape clé de la formation des orogènes et induisent un métamorphisme de haute pression, localisé dans les faciès des schistes bleus et éclogites. Caractériser la durée et l’intensité de ce métamorphisme est ainsi une étape cruciale puisque amenant des contraintes quantitatives sur la géodynamique d’un orogène. Par une étude pétrologique et géochronologique, cette thèse a ainsi pour objectif de préciser les conditions et durées du métamorphisme de haute pression dans le sud du Massif Central Français (chaîne Varisque), à travers l’étude des massifs de Najac, de la Montagne Noire et du Lévézou. Cette thèse associe ainsi une géochronologie multiméthodes (U-Pb sur zircon, rutile et apatite, Lu-Hf et Sm-Nd sur grenat, 40Ar-39Ar sur biotite et muscovite) à des analyses pétrologiques impliquant des modélisations numériques d’équilibres de phases (Theriak-Domino et THERMOCALC). L’étude d’une éclogite du massif de Najac a ainsi permis de déterminer des conditions de 15 à 20 kbar et 560 à 630°C pour le métamorphisme de haute pression. Le début du faciès éclogite y est daté à ~383 Ma, tandis que le pic du métamorphisme éclogitique est atteint à 375.7 ± 1.2 Ma. La datation des éclogites de la Montagne Noire n’a pas permis de préciser un âge solide de l’évènement de haute pression. Néanmoins, les conditions de pression et température du faciès éclogite y sont estimées à ~ 21 kbar et ~ 750°C. L’étude des massifs de Najac et de la Montagne Noire a mis en évidence de potentiels découplages entre les systèmes de terres rares et le système isotopique U-Pb. Les protolithes des terrains éclogitiques du massif du Lévézou, tant mafiques que felsiques, se sont mis en place à ca. 470 Ma. Le métamorphisme éclogitique affectant les roches mafiques est estimé à 21-23 kbar pour 680- 800°C et atteint à ~358 Ma. L’exhumation, bien caractérisée, y est rapide : les terrains éclogitiques atteignent 8-9.5 kbar et ~600°C à ~352 Ma, impliquant une exhumation très rapide, suivie d’un refroidissement de plus de 50°C/Ma. Les granites du massif du Lévézou présentent des pseudomorphoses de cordiérite à disthène-grenat-muscovite-quartz, développées lors du métamorphisme de haute pression et équilibrées à ca. 15-17 kbar et ~670°C. La déformation majeure observée dans ces granites peut s’accompagner de fusion localisée, et semble se produire en différentes étapes, depuis ~352 Ma à ~340 Ma. Replacées dans un contexte général, ces données s’inscrivent pleinement dans les gammes d’âges de la haute pression décrites pour la chaîne varisque et permettent de reconsidérer la tectonique du Massif CentralSubduction is one of the key stages of the mountain building processes. It leads to the development of high-pressure (HP) metamorphism in the rocks that typically equilibrate in the blueschist or eclogite-facies conditions. Dating the HP metamorphism and estimating its intensity is therefore a major challenge when reconstructing geodynamics through time. Through a petrological and geochronological study, this PhD dissertation aims to better constrain conditions, durations and timings of HP metamorphism in the southern French Massif Central (European Variscan Belt). The massifs of Najac, Montagne Noire and Lévézou were investigated by a multi-method geochronological approach (zircon, rutile and apatite U-Pb dating, garnet Lu-Hf and Sm-Nd dating, biotite and muscovite 40Ar-39Ar dating) associated with a petrological analysis including numerical modelling of phase equilibria (Theriak-Domino and THERMOCALC). The Najac eclogites reached 560-630 °C at 15-20 kbar and the prograde part of the highpressure metamorphic event lasted for ~ 7 Myr starting at ~ 383 and peaking at ~ 376 Ma. Eclogites hosted in sillimanite-bearing migmatites in the Montagne Noire dome (French Massif Central) reached c. 750°C, 21 kbar before significant decompression at high temperatures. However, none of the obtained geochronological dates could be associated with the HP event. The study of the Najac massif and the Montagne Noire Dome highlight potential decoupling between the REE and the U-Pb isotopic systems. The emplacement of the protoliths of felsic and mafic HP rocks in the Lévézou Massif was estimated at ca. 470 Ma. HP metamorphism peaked at 21-23 kbar and 680-800°C at ~358 Ma. The subsequent fast exhumation reached 8-9.5 kbar and ~600°C at ~352 Ma, highlighting a very fast exhumation followed by a cooling rate of 50°C/Ma. Granites from the Lévézou massif display kyanite-garnet-muscovite-quartz pseudomorphs after cordierite that equilibrated at ca. 15-17 kbar and ~670°C. The major deformation in these granites is associated with the exhumation stage, locally accompanied by partial melting, and seems to occur in different episodes, from ~352 Ma to ~340 Ma. On a larger scale, these results are fully in line with the HP ages described in the Variscan Belt and allow to reconsider the tectonics in the French Massif Central
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Sepeteanu, Desormais Ileana. « Artériopathie oblitérante des membres inférieurs en Afrique Centrale : Epidémiologie, facteurs de risque, marqueur pronostique ». Thesis, Limoges, 2014. http://www.theses.fr/2014LIMO0070/document.
Texte intégralRésumé :
Le vieillissement de la population mondiale s’accompagne de l’augmentation de la prévalence des maladies non transmissibles, dont certaines liées à l’athérosclérose. Les études épidémiologiques sur l’artériopathie oblitérante des membres inférieurs (AOMI) ont été majoritairement menées dans les pays occidentaux. Peu d’entre elles sont conduites dans les pays à faible et moyen revenu, comme les pays africains alors que la rapide transition socio-économique de ces pays entraîne une modification épidémiologique importante. Le programme EPIDEMCA (Épidémiologie des Démences en Afrique Centrale), enquête épidémiologique transversale multicentrique en population générale âgée de 65 ans et plus, a été mené en zones rurales et urbaines de deux pays d’Afrique Centrale: la République Centrafricaine (RCA) et la République du Congo (RDC), entre 2011 et 2012. Durant la première phase, l’enquête épidémiologique a permis de déterminer la prévalence de l’AOMI et d’analyser les facteurs de risque associés. L’AOMI a été définie par un Index de Pression Systolique (IPS) ≤ 0,9. Parmi les 1871 participants évalués sur le plan vasculaire, la prévalence de l’AOMI a été de 14,8% et atteignant 22,2% pour les sujets âgés de 80 ans et plus. Une prévalence plus importante de l’AOMI a été retrouvée dans les zones urbaines en RDC (20,7% versus 14,4% dans la zone rurale, p=0,0114). Cette différence n’a pas été retrouvée en RCA (11,5% urbain versus 12,9%, rural p=NS). Après ajustement à tous les possible facteurs confondants, des facteurs de risque associés avec l’AOMI ont été décrits : l’âge (OR: 1,03 ; p=0,0039), l’hypercholestérolémie (OR: 1,88 ; p=0,0034), le tabac (OR: 1,78 ; p=0,0026). Plus particulièrement, cette première étude en population générale ayant analysé spécifiquement le rôle de la dénutrition (Index de Masse Corporelle <18) dans l’AOMI met en évidence une association significative (OR: 2,09; p=0,0009) et ceci autant chez les hommes que chez les femmes (OR: 2,82; p= 0,0038 et respectivement OR: 1,75; p= 0,0492). Lors de la deuxième phase de l’étude, ayant permis la confirmation de l’atteinte cognitive, nous avons analysé l’association entre l’IPS et la présence des troubles cognitifs. La prévalence des troubles cognitifs s’est avérée être de 13,6%, plus importante chez les sujets avec IPS≤0,9 et IPS≥1,4 que chez les sujets avec 0,9With the aging of the global population, the prevalence of non-communicable, including cardiovascular, diseases is increasing. While epidemiological studies on peripheral artery disease (PAD) have been mainly conducted in high-income countries, a few have been carried out in low-and middle-income countries, including in Africa. EPIDEMCA (Epidemiology of Dementia in Central Africa) is a cross-sectional population-based study in rural and urban areas of two countries of Central Africa: Central African Republic (CAR) and the Republic of Congo (ROC). Overall, its aim was to investigate the health status in aging population in Central Africa, with a special focus on cognitive disorders, PAD (Ankle-Brachial Index (ABI) ≤0.90). and cardiovascular risk factors as well as their inter-relationship. The EPIDEMCA program was carried out, among people aged 65 years and over, between 2011 and 2012. Among 2002 subjects who agreed to participate, reliable demographic and vascular data were available in 1871 subjects.Overall, the prevalence of PAD was 14.8% reachting 22.2% after the age of 80. The prevalence was higher in ROC than in CAR (17.4% vs. 12.2%, p=0.0071) and in females than males (16.6% vs. 11.9%, p=0.0122). Higher rates of PAD were found in urban area in ROC (20.7% vs. 14.4% in rural area, p=0.0114), not in CAR (11.5% vs. 12.9%, p=ns). In the multivariate analysis, PAD significantly associated factors were described: age (OR: 1.03; p=0.0039), dyslipidemia (OR: 1.88; p=0.0034), smoking (OR: 1.78; p=0.0026), and more specifically undernutrition (OR: 2.09, p=0.0009). Undernutrition was still significantly associated with PAD after adjustment to all potential confounding factors in males as well as in females (OR: 2.82, p= 0.0038 respectively OR: 1.75, p= 0.0492). As epidemiological research on the implication of atherosclerosis in the development of cognitive impairment in general population is lacking in Africa, we focused on the role of ABI as an available marker of atherosclerosis, providing independent and incremental information on subjects’ susceptibility to present cognitive disorders.The prevalence of cognitive impairment among the study participants was 13.6%, higher in subjects with ABI≤0.9 and ABI≥1.4 than those with 0.9
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Champéroux, Pascal. « Dihydropyridines et systeme nerveux central : participation au controle central de la pression arterielle chez le rat spontanement hypertendu ». Paris 6, 1989. http://www.theses.fr/1989PA066092.
Texte intégralRésumé :
Ce travail met en evidence la participation des recepteurs centraux aux dhp au controle central de la pression arterielle chez le rat spontanement hypertendu. Les recepteurs centraux aux dhp, identifies comme etant des canaux calciques de type l, semblent impliques dans le controle du tonus sympathique chez le rat sh. Les effets sympatho-inhibiteurs de la nicardipine, une dhp antagoniste, et symptho-excitateurs du b2ay k 8644, une dhp agoniste, sont etroitement dependants de l'hyperactivite des systemes cholinergiques centraux chez le rat sh: une participation des canaux calciques sensibles aux dhp a la neurotransmission cholinergique est demontree dans cette souche de rat. Les systemes opioides centraux apparaissent aussi impliques dans les effets cardiovasculaires centraux de la nicardipine. Les effets sympatho-inhibiteurs de la nicardipine pourraient resulter, au moins en partie, d'une interaction directe avec des sites aux dhp au niveau du noyau du tractus solitaire. Les recepteurs centraux aux dhp pourraient donc jouer un role dans l'hypertension arterielle genetique du rat sh. L'endotheline, un peptide vasoconstricteur puissant produit par les cellules endotheliales vasculaires, pourrait etre un agoniste endogene des canaux calciques sensibles aux dhp. Toutefois, ce peptide ne semble pas etre un ligand endogene des sites de liaison aux dhp
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Ralaikoa, Albert. « Pression fiscale et appauvrissement chronique sur les hautes terres centrales malgaches (1896-1945) ». Paris 7, 1986. http://www.theses.fr/1986PA070139.
Texte intégralRésumé :
Ce travail est une tentative de presentation de l'appauvrissement des contribuables sous l'action de l'impot colonial a madagascar durant la periode qui va de 1896 a 1945 dans un milieu essentiellement agricole, en l'occurence rizicole. Ce processus d'appauvrissement n'est pas un fait tout a fait nouveau. Il plonge ses racines dans la periode royale precedant la conquete. Ce qui est different c'est le contexte dans lequel il a evolue, mais aussi l'apparition de l'impot personnel comme principale charge fiscale. Comme pendant la periode royale, les facultes imposables des contribuables sont mediocres. Les charges fiscales, en particulier les impots personnels, ont evolue beaucoup plus vite que le prix et le salaire. Mais la pression est beaucoup plus vive dans le betsileo qu'en imerina, a tananarive qu'en milieu rural. De 1896 a 1945 la pression reste dure. Mais elle culmine sous gallieni et ses deux successeurs immediats et sous l. Cayla. La periode la plus lache se situe sous m. Olivier. A cause du poids qu'il represente, l'impot a suscite de nombreuses reactions allant du faux livret au vol de boeufs, veritable destabilisation de la societe donc des conditions de la realisation de l'impot elles-memesThis work seeks to measure the degree of impoverishment of the tax-payers during the colonial period in madagascar, between 1896 and 1945, in a mostly rural society of rice growers. The proces of impoverishment is not quite new. It started during the royal period preceding the conquest. But the difference lies in the context of colonial oppression and in the creation of personal tax as main way of taxation. The financial resources of tax-payers are limited, just as they were during the royal period. The fiscal burden and particularly the personal tax develops much more quickly than prices and wages. But fiscal pressure is much higher in betsileo than in imerina, and higher in tananarive than in rural districts. Between 1896 and 1945, there is no abatement of the pressure. It is at its heighest under gallieni and his two succesors as well as under olivier. Because of its burden, the personal tax gives rises a series of reactions, from the falsification of personal papers to the stealing of oxen, a process which has deeply unsettling effects on the whole of society and consequently on the levying of taxes itself
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Ralaikoa, Albert. « Pression fiscale et appauvrissement chronique sur les Hautes Terres centrales malgaches, 1896-1945 ». Lille 3 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37600593k.
Texte intégralLivres sur le sujet "Pressione centrale"
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Mercier, Jean-Pierre. La maintenance des centrales nucléaires à eau sous pression. Maisons-Alfort, France : Editions Kirk, 1987.
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Boilers, ASME Boiler and Pressure Vessel Committee Subcommittee on Heating. 2007 ASME boiler & pressure vessel code : An international code : Materials. New York, N.Y : American Society of Mechanical Engineers, 2007.
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Obermeyer, Nancy J. Bureaucrats, clients, and geography : The Bailly nuclear power plant battle in northern Indiana. Chicago, Ill : University of Chicago, 1989.
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David, Knoke, dir. The organizational state : Social choice in national policy domains. Madison, Wis : University of Wisconsin Press, 1987.
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Carroll, Noël. Dance. Sous la direction de Jerrold Levinson. Oxford University Press, 2009. http://dx.doi.org/10.1093/oxfordhb/9780199279456.003.0033.
Texte intégralRésumé :
The question of what makes dance an artform does not appear to emerge as a pressing philosophical issue until the eighteenth century, after which time it becomes a central topic. The reason for this should be fairly obvious: it is only in the eighteenth century that theorists became preoccupied with codifying the modern system of the arts — that is, with determining which practices belong to the sisterhood of the beaux arts (or fine arts). Two figures of particular importance in this transition were John Weaver and Jean-Georges Noverre. Importantly, both of these writers were not only theoreticians, but also choreographers.
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Tognato, Carlo. Culture and the Economy. Sous la direction de Jeffrey C. Alexander, Ronald N. Jacobs et Philip Smith. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780195377767.013.5.
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This article examines the intellectual mission of a cultural sociology of the economy, its theoretical horizon, and its pragmatic relevance in times of economic crisis. It first considers classical sources of a cultural sociology of the economy before discussing the use of cultural analysis in contemporary economic sociology. It then outlines the central features of a cultural sociology of the economy and emphasizes the moral obligation of scholars to offer fresh insights into the mechanisms that sustain public confidence or help to repair it, and more specifically how a cultural sociology of the economy can contribute in this respect. It argues that a cultural sociology of the economy can help tackle three of the most pressing problems that loom on the horizon of the current world economic crisis: the general public’s loss of confidence for private corporations, the economic profession, and independent central banks.
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Lake, Peter. Tragedy and Religion. Sous la direction de Michael Neill et David Schalkwyk. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780198724193.013.11.
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In the post-Reformation period the relationships between revenge and justice and between revenge and political resistance became newly pressing and problematic. This chapter argues that in his two revenge tragedies of the Elizabethan fin de siècle, Titus Andronicus and Hamlet, Shakespeare stages those relationships and the concomitant difficulties. In each case he was arguably using the temporal and geographical distance afforded him by the play's setting—in the case of Titus, a remote, wholly pagan, and entirely made-up Rome, and in the case of Hamlet an entirely foreign and temporally remote (albeit also remarkably contemporary) Denmark—in order to address questions that in the context of a play about recent English history might have proven a little too close to home. The two plays share certain central characteristics—Hamlet indeed might well be read as something of a reworking of Titus—and this chapter proceeds through a comparison between the two, organized around the central triad of revenge, religion, and resistance.
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Ware, Susan. 3. The challenges of citizenship, 1848–1920. Oxford University Press, 2015. http://dx.doi.org/10.1093/actrade/9780199328338.003.0004.
Texte intégralRésumé :
‘The challenges of citizenship, 1848–1920’ outlines the pressing issues of American life from the Civil War through to World War I. The activism of women such as Ida Wells-Barnet describes the struggle for African Americans to find political and economic justice after emancipation. Jim Crow segregation and hardening racial attitudes made free life for African Americans very difficult. The Civil War also acted as an important spur to industrialization. Immigration and female wage labor was central to this surge. The growth of higher education was an important precondition for women's new public engagement. The final push for suffrage, which was part of the larger Progressive era reform movement, is also described.
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Besson, Samantha, dir. Theories of International Responsibility Law. Cambridge University Press, 2022. http://dx.doi.org/10.1017/9781009208550.
Texte intégralRésumé :
There is no issue more central to a legal order than responsibility, and yet the dearth of contemporary theorizing on international responsibility law is worrying for the state of international law. The volume brings philosophers of the law of responsibility into dialogue with international responsibility law specialists. Its tripartite structure corresponds to the three main theoretical challenges in the contemporary practice of international responsibility law: the public and private nature of the international responsibility of public institutions; its collective and individual dimensions; and the place of fault therein. In each part, two international lawyers and two philosophers of responsibility law address the most pressing questions in the theory of international responsibility law. The volume closes with a comparative 'world tour' of the responsibility of public institutions in four different legal cultures and regions, identifying stepping-stones and stumbling blocks on the path towards a common law of international responsibility.
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Mills, R. J. W. The Common Sense of a Poet. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198783909.003.0007.
Texte intégralRésumé :
This chapter examines the writing and content of James Beattie’s (1735–1803) best-selling Essay on Truth (1770) in terms of his motivations and interests in the late 1760s. The Essay was intended to be a mocking attack on recent sceptical philosophy, with Hume as the central target. The chapter argues that Beattie’s arguments emerged out of the intellectual milieu of 1760s Aberdeen, but were influenced greatly by his interest in the literary arts. The latter framed his particular understanding of the ‘science of human nature’ as something best studied by poets, novelists, and historians and not introspective philosophers. Moreover, Beattie is argued not to be a fearful provincial author railing against the commercial life of Edinburgh and London, but a man deeply angered by recent philosophy from Descartes to Hume and who had many supporters in and outside of Aberdeen pressing him to publish his pugilistic Essay.
Chapitres de livres sur le sujet "Pressione centrale"
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Salvi, Paolo. « La pressione arteriosa centrale ». Dans Onde di polso, 47–70. Milano : Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2424-3_5.
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Salvi, Paolo. « Pressione centrale e rischio cardiovascolare ». Dans Onde di polso, 91–108. Milano : Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2424-3_7.
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Salvi, Paolo. « Analisi della curva di pressione centrale ». Dans Onde di polso, 71–90. Milano : Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2424-3_6.
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Salvi, Paolo. « Acquisizione non invasiva della pressione arteriosa centrale ». Dans Onde di polso, 109–28. Milano : Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2424-3_8.
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Salvi, Paolo. « Velocità dell’onda di polso e pressione centrale in animali da laboratorio ». Dans Onde di polso, 137–39. Milano : Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2424-3_10.
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Leone, M., F. Garnier, S. Wiramus et C. Martin. « Le cathétérisme veineux central en réanimation : pression veineuse centrale et saturation veineuse en oxygène ». Dans Les techniques de monitorage hémodynamique en réanimation, 105–25. Paris : Springer Paris, 2007. http://dx.doi.org/10.1007/978-2-287-71154-1_8.
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Mohiuddin, Maliha Binte, et Michael Jabot. « Activating Education for Sustainable Development Goals Through YouthMappers ». Dans Sustainable Development Goals Series, 93–99. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-05182-1_8.
Texte intégralRésumé :
AbstractIn hopes of building inclusive and sustainable societies, SDG 4, quality education, is central to helping to build a knowledge base to tackle some of the most pressing challenges faced by society. YouthMappers around the world are applying their knowledge coupled with critical reflection tools to act on and bring others along in making changes that improve the world. As such, they can be considered among a generation of “Solutionaries,” students who extend their understanding beyond typical boundaries to include a systematic application of their learning. Youth, in general, and young women, in particular, can get aligned to the opportunity to learn through practical knowledge, by way of inclusive mapping communities, which sparks their passion for learning and supports SDG 5 gender equality in education, as well.
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Keskinen, Suvi. « Antiracist Feminism and the Politics of Solidarity in Neoliberal Times ». Dans Feminisms in the Nordic Region, 201–21. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53464-6_10.
Texte intégralRésumé :
AbstractThis chapter analyses the establishment and expansion of antiracist feminism in the last decade throughout the Nordic region, with new groups, media sites, and public events organised, especially in the large cities. I examine antiracist feminist and queer of colour activism in which the main or sole actors belong to groups racialised as non-white or “others” in Nordic societies. A fundamental argument developed in the chapter is the central role and potential of these emerging social movements to reconfigure political agendas and tackling of pressing societal issues, due to their capacity to overlap and connect the borders of antiracist, feminist, and (to some extent) class-based politics. The chapter further argues for the usefulness of theorising the neoliberal turn of racial capitalism as the societal condition in which feminist activism takes place.
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Jonker, Jan, et Niels Faber. « Speaking of Transition ». Dans Organizing for Sustainability, 1–17. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78157-6_1.
Texte intégralRésumé :
AbstractWe are confronted with increasingly pressing questions about economic and social transition. Things have to change, but how? We believe that this change is concerned with three closely related challenges, which we call the triple transition—climate, energy, and circularity. These challenges combined result in a call for radical and major changes in the configuration of our economies and for the reconsideration and redesign of our systems. The fact remains that we live in organized societies and economies in which together we need to shape these transitions. Central to this book stands the premise that transition requires new forms of value creation materialized in the new generation of sustainable and circular business models. To make this possible the Business Model Template (BMT) was developed. The purpose of this chapter is to introduce you to the structure and style of this book and how the BMT is presented in the various chapters.
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Shakmak, Bubaker, Matthew Watkins et Amin Al-Habaibeh. « How Clean Is the Air You Breathe ? Air Quality During Commuting Using Various Transport Modes in Nottingham ». Dans Springer Proceedings in Energy, 247–54. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_31.
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AbstractAir quality has developed into a significant global issue and its negative effect on human health, wellbeing and ultimately the effect of shortening of life expectancy is becoming a pressing concern. Such concerns are most acute in cities in the UK. Although many cities, including Nottingham, are taking significant measures to enhance air quality, there was limited work focusing on the individual’s experience during commuting. This paper suggests a novel approach for measuring commuting air quality through quantifying particulate matters PM2.5 and PM10, using the city of Nottingham as a case study. Portable low-cost systems comprising of a GPS sensor and an Aeroqual pollution data logger were used to capture data and develop the sensor fusion via newly developed software. Data was collected from a variety of transport modes comprising bike, bus, car, tram and walking to provide evidence on relative particulate levels and 2D and 3D data maps were produced to communicate the relative pollution levels in a publicly accessible manner. The study found as expected particulate pollution to be higher during peak hours and typically closer to the city. However whilst the lowest particulate concentrations were found on the Tram the highest were for cyclists contrary to the literature. The project encompasses a democratic crowd sourced approach to data collection by enabling the public to gather data via their daily commute, increasing people’s awareness of the air quality in their locality. The acquired data permitted a range of comparisons considering differing times of day and zones such as the city centre and surrounding residential areas in the City council boundary.
Actes de conférences sur le sujet "Pressione centrale"
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Furlan, Katuana Varela, Carolina Rocha Carvalho et Rafael Prado Cartana. « Avaliação da insolação e distribuição da radiação solar no ambiente urbano de Balneário Camboriú ». Dans Seminario Internacional de Investigación en Urbanismo. Barcelona : Curso de Arquitetura e Urbanismo. Universidade do Vale do Itajaí, 2016. http://dx.doi.org/10.5821/siiu.6279.
Texte intégralRésumé :
Apesar das prementes demandas ambientais contemporâneas, o planejamento urbano vigente das áreas centrais de grande parte das cidades brasileiras apresenta insuficientes considerações relativas ao conforto ambiental, principalmente no que se refere à ocupação do solo, gabaritos e afastamentos. Assim sendo, o objetivo deste trabalho é avaliar a insolação e o sombreamento gerado pelas edificações no ambiente urbano de Balneário Camboriú através do uso de Máscaras de Sombra e análises de radiação solar incidente nas fachadas. Como metodologia: utilizando o aplicativo Autodesk Ecotect Analysis, foram geradas Máscaras de Sombras de uma região urbana representativa da morfologia da área central da cidade, complementarmente, foram simulados valores de radiação incidente nas fachadas de edificações desta região. Como principal resultado, pode-se observar que a morfologia urbana resultante da aplicação da legislação na área central da cidade resulta em situações prejudiciais à adequada insolação e iluminação natural das edificações e espaços urbanos. Despite the pressing contemporary environmental demands, the current urban planning of the central areas of most Brazilian cities, make insufficient considerations relating to environmental comfort, especially regarding to land use, spacing and height of the buildings. Therefore, this paper aims to evaluate the insolation and shading generated by buildings in the urban environment of Balneário Camboriú through the use of shading masks and solar radiation analysis on the facades. The methodology: using the software Autodesk Ecotect Analysis, shading masks were generated representing the urban morphology of the downtown city areas, in addition, were simulated incident solar radiation values on the facades in buildings locates in this areas. The main result is that the application of the existing legislation in the central area of the city results in harmful situations to insolation and daylight of buildings and urban spaces.
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Lupu, Aurel, et Raluca Ivan. « Non-Financial Reporting In Emerging Economies Central and South-East Europe ». Dans 2nd International Conference Global Ethics - Key of Sustainability (GEKoS). LUMEN Publishing House, 2021. http://dx.doi.org/10.18662/lumproc/gekos2021/8.
Texte intégralRésumé :
The research currently presented is related to non-financial reporting and the prevailing reporting practices employed by enterprises posing risks to the environment. The worldwide economy is in a continuous change and the companies must face all the new challenges to assure a good development of their business. One of the most pressing challenge is related to the reporting of information in an integrate form. It is considered that the traditional model of financial reporting does not represent a comprehensive image to assess the previous and future performance of a company. According to the Directive 2014/95/EU regulations, reporting of non-financial information encompasses three major areas: environmental, social, and labour. Each is equally important, though environmental issues seem of particular significance in enterprises posing risks to the environment. The natural environment and its protection are important from the viewpoint of future generations. The transition from voluntary disclosure of non-financial information to mandatory regulation in the EU has taken place due to continuous increasing needs to have more transparency and rigor of information disclosed by companies. Indeed, voluntary reporting of CSR has many aspects of weakness, it is difficult to compare the information of different companies; it is a tool to avoid regulation; lack of execution and accountability; and leads to rhetoric, as corporations continue to create many problems for society.
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Takatori, K., T. Honma, N. Kamiya, H. Masaki, S. Sasaki et S. Wada. « Fabrication and Testing of Ceramic Turbine Wheels ». Dans ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/91-gt-142.
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Silicon nitride (Si3N4) radial inflow turbine wheels were fabricated by injection molding at Toyota Central R & D Labs. The wheel was 142mm in outer diameter and had 14 blades. The radial wheel was too bulky to manufacture as a homogeneous and defect-free body in one piece. It was divided into two pieces for injection molding and put together into one body by a cold isostatic pressing step after binder removal. Spin testing was executed at room temperature and the resulting photographs taken from three directions provided useful information about the fracture mode of the wheels. The maximum burst speed of the wheels at room temperature was 98,900 rpm, which corresponded to 145% of the design speed. In a hot rig test, one of the wheels survived 75,000rpm for ten minutes at a turbine inlet temperature of 1,050°C.
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Sholihah, Imrok Atus, et Risna Widowati. « Effect of Acupuncture and Acupressure Therapy on Reduction of Pain Levels in Lower Step Pain Patients, Dukuh Duwetan, Central Java ». Dans The 7th International Conference on Public Health 2020. Masters Program in Public Health, Universitas Sebelas Maret, 2020. http://dx.doi.org/10.26911/the7thicph.05.20.
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ABSTRACT Background: The lower limb consists of four major parts: a girdle formed by the hip bones, the thigh, the leg, and the foot. It is specialized for the support of weight, adaptation to gravity, and locomotion. Acupuncture involves the insertion of needles into specific points in the body by a licensed acupuncturist. Acupressure uses firm pressure to massage those points, with similar effects. This study aimed to determine effect of acupuncture and acupressure therapy on reduction of pain levels in lower step pain patients, Duwetan, Central Java. Subjects and method: This study was a experimental study with one Group pretest-posttest conducted in Dukuh Duwetan, Karanganyar Regency, Central Java from February to March. A sample of 30 farmers, both men and women aged 30-50 years with complaints of lower limb pain during and after work, who met the inclusion criteria. The dependent variable was decrease level of pain lower limb. The independent variable was effect of the stabbing and emphasis on points Blader (BL) 57 (Chengsan) and Blader (BL) 40 (Weizhong). The data collected by observation sheet of pain degrees, according to Smeltzer, S.C bare B.G and analysed by Wilcoxon test. Results: The results of the stabbing and pressing at BL 57 and BL 40 points (Mean= 1; SD= 0.71) were lower than before therapy (Mean= 6; SD= 1.21), there was a decrease in the pain scale with lower limb. After stabbing and suppression were applied (OR= 7.85; 95% CI =0.0 to 2.0;p <0.001). Conclusion: There is an effect of acupuncture and acupressure therapy on lower leg pain reduction. Keywords: lower limb, acupuncture, acupressure Correspondence: Imrokatus Sholihah. Ministry of Health, Surakarta Polytechnic Health Department of Acupuncture. Jl. Letjen Sutoyo, Mojosongo, Jebres disctrict, Surakarta, Central java 57127 Email: imrokatussholihah6@gmail.com Mobile: +62811225210. DOI: https://doi.org/10.26911/the7thicph.05.20
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Oliveira, Maisa Carla de, Guilherme Oliveira da Torres et Bárbara Dezotti Pessinatti. « INTOXICAÇÃO POR FUMONISINA B1 EM EQUIDEOS - REVISÃO BIBLIOGRÁFICA ». Dans I Congresso Brasileiro Online de Práticas Veterinárias : Uma abordagem para animais de grande porte e produção Animal. Revista Multidisciplinar em Saúde, 2022. http://dx.doi.org/10.51161/granvet-04.
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Introdução: a leucoencefalomalácia é um processo neurotóxico, altamente fatal, e que afeta os equídeos, levando a degeneração da substância branca do encéfalo. A outra forma de intoxicação é hepática, onde pressupõe que os efeitos são mais leves e fáceis de se reverter. A enfermidade é causada pela ingestão da micotoxina fumonisina B1, que é um metabólito produzido pelo fungo Fusarium moniliforme, podendo ser encontrado no milho armazenado em condições precárias, essa micotoxina tem ação deletéria no sistema nervoso central destes animais. Os sinais clínicos surgem abruptamente e os mais comuns incluem fraqueza, ataxia, hiperexcitabilidade ou estado mental semicomatoso, andar em círculos, tremores musculares, dificuldade na apreensão e mastigação de alimentos, incoordenação, anorexia ehead pressing, com a evolução do quadro clínico pode haver convulsões, coma e morte, o óbito pode ocorrer dentro de horas ou poucos dias. As lesões macroscópicas típicas da leucoencefalomalácia incluem necrose liquefativa dos hemisférios cerebrais. O diagnóstico é realizado através da anamnese, histórico do animal, análise do alimento ofertado e achados de necropsia. Não há um tratamento específico para a patologia em questão, somente uma terapia suporte, com o objetivo de diminuir os danos causados no sistema nervoso central e o sofrimento doequídeo. Objetivos:O o bjetivo do presente estudo é realizar um resumo sobre aleucoencefalomalácia em equídeos e esclarecer possíveis dúvidas acerca doconteúdo.Materiais e métodos:A metodologia adotada para a elaboração deste trabalhoconsta em pesquisas bibliográficas baseadas na análise da literatura já publicada emformas de livros e artigos científicos. Resultados: De acordo com a pesquisa realizadaleva- se em consideração que esta é uma patologia relevante na clínica de equídeos, sendoque pode levar a morte do animal, e o único meio de evitá -la é a prevenção e atenção aomanejo alimentar dos equídeos. Conclusão: O prognóstico desta afecção é consideradodesfavorável e a prevenção de suma importância, pois somente com o manejo alimentaradequado é possível evitar a doença.
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Zhao, Jian-Hua, Henri Champliaud et Thien-My Dao. « Simulation of Shear Spinning Process for Pressure Vessel Components ». Dans ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26363.
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Spinning process for the medium- and small-lot production of axisymmetric components has many advantages, such as smaller deformation force, simpler tool-and-die design, and lower investment in equipment, over conventional forming processes. It has been widely used in aerospace, energy and defense industry. This paper presents a 3-D elastoplastic finite element (FE) model for the simulation of the shear spinning process, in order to study deformation behaviour and design proper process parameters for the spinning process. The proposed model has the following characteristics: i) a shell element is used to mesh the contact pairs between the workpiece (a metal blank) and the tool sets (a pressing roller and a mandrel); ii) the offset thickness of the shell element is considered during contact treatment; iii) the movement of the roller and the fixing of the central blank and mandrel are treated as the boundary condition; iv) relative movement between the roller and the blank is treated as a spiral feeding process. FEM simulations for shear spinning with aluminum have been implemented, using a dynamic explicit scheme, on ANSYS/LS-DYNA software. Spinning force, thickness distribution and stress distribution have been studied under various roller feeds and inclined angles of mandrel. The simulation results have provided good confirmation with the experiments.
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Scales, C. R., E. R. Maddrell, J. Hobbs, R. Stephen, S. Moricca et M. W. A. Stewart. « Building Flexibility Into the Design of a Pilot Plant for the Immobilisation of Pu Containing Residues and Wastes ». Dans ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icem2013-96043.
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NNL and ANSTO on behalf of Sellafield Ltd have developed a process for the immobilisation of a range of Pu containing wastes and residues. Following the inactive demonstration of the technology the project is now focusing on the design of an active pilot plant capable of validating the technology and ultimately immobilising a waste inventory containing around 100kg plutonium. The diverse wastes from which it is uneconomic to recover Pu, require a flexible process with a wide product envelope capable of producing a wasteform suitable for disposal in a UK repository. Ceramics, glass ceramics and metal encapsulated wasteforms can be delivered by the process line which incorporates size reduction and heat treatment techniques with the aim of feeding a hot isostatic pressing process designed to deliver the highly durable wasteforms. Following a demonstration of feasibility, flowsheet development is progressing to support the design which has the aim of a fully flexible facility based in NNL’s Central Laboratory on the Sellafield site. Optimisation of the size reduction, mixing and blending operations is being carried out using UO2 as a surrogate for PuO2. This work is supporting the potential of using an enhanced glass ceramic formulation in place of the full ceramic with the aim of simplifying glove box operations. Heat treatment and subsequent HIPing strategies are being explored in order to eliminate any carbon from the feeds without increasing the valence state of the uranium present in some of the inventory which can result in an unwanted increase in wasteform volumes. The HIP and ancillary systems are being specifically designed to meet the requirements of the Sellafield site and within the constraints of the NNL Central Laboratory. The HIP is being configured to produce consolidated product cans consistent with the requirements of ongoing storage and disposal. With the aim of one cycle per day, the facility will deliver its mission of immobilising the identified waste and residues inventory within 3 years. During that period it will also be used to demonstrate the potential of this technology to deliver the immobilisation of a proportion of the UK plutonium stockpile that may not be suitable for use as MOx fuel should that decision be taken.
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Chakraborty, Partha P., et Melanie M. Derby. « Evaporation From a Simulated Soil Pore : Effects of Relative Humidity ». Dans ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icnmm2018-7628.
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Reduction of irrigation is a pressing issue in the food-water-energy nexus. Around two-third of global water withdrawals are used for irrigation in the areas with insufficient rainfall. In the U.S. Central High Plains, the Ogallala Aquifer is responsible for providing water for the production of corn, wheat, soybeans, and cattle; reducing the evaporation of water from soil provides an excellent opportunity to decrease the need for irrigation. In this paper, evaporation of sessile 4-μl water droplets from a single simulated soil pore was observed. Soil pores were created using three 2.35-mm hydrophilic glass or hydrophobic Teflon beads of the same size. The experiments were conducted at the same temperature (20° C) and two relative humidity levels, 45% and 60% RH. Evaporation times were recorded and the transport phenomena were captured using a high-speed camera. Relative humidity directly affected evaporation; evaporation times were lower at the lower RH. The glass surface had higher wettability and therefore the droplets were more stretched on the glass beads, more droplet-air areas were created and evaporation times were approximately 30 minutes at 60% RH. The Teflon surface was hydrophobic, for which air-water contact areas were lower, and evaporation times were longer — approximately 40 minutes at 60% RH. As evaporation progressed, a liquid island formed between two beads at both 45% and 60% RH in for glass and Teflon pores. The rate of decrease of the radius of the liquid island was shorter in Teflon than glass beads, which corresponded to lower evaporation rates from Teflon.
Rapports d'organisations sur le sujet "Pressione centrale"
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Margheritis, Ana, et Luicy Pedroza. Is there "Latin American" approach to migration governance ? Fundación Carolina, septembre 2022. http://dx.doi.org/10.33960/ac_16en.2022.
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Innovative migration governance mechanisms have been rapidly evolving in Latin America in the last two decades. More recently, new policies have emerged to address both longstanding and unexpected pressing issues, such as the vast and sudden flows from Venezuela and Central America. Focusing on two main sub-regions (Central and South America) and five main areas of state involvement (irregular immigration, border control, diaspora engagement policies, multilateral management of intra-regional mobility, and forced migration), we revisit the argument that a distinctive Latin American approach emerged at the turn of the century. We document growing policy divergence across countries and subregions, which is rendering the region increasingly in line with global trends.