Relevant bibliographies by topics / Phase minimale

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Phase minimale'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Phase minimale"

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Jaite, Charlotte, Christian Bachmann, Marc Dewey, et al. "Magnetresonanztomographie (MRT) bei Kindern und Jugendlichen." Zeitschrift für Kinder- und Jugendpsychiatrie und Psychotherapie 41, no. 6 (2013): 447–51. http://dx.doi.org/10.1024/1422-4917/a000260.

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Zahlreiche Forschungszentren setzen die Magnetresonanztomographie (MRT) zu Studienzwecken an Minderjährigen ein. Angesichts dieser Forschungspraxis werden jedoch ethische Bedenken bezüglich der Belastung, der die Studienteilnehmer während der MRT-Untersuchung ausgesetzt sind, diskutiert. Ziel der Studie ist daher zu evaluieren, ob eine MRT-Untersuchung negative Emotionen bei Kindern und Jugendlichen induziert, die stärker sind als die gegenwärtig als «minimale Belastung» eingestufte Untersuchungsmethode der Elektroenzephalographie (EEG). Weiterhin wird die durch eine MRT-Untersuchung von Kindern und Jugendlichen induzierte emotionale Belastung mit der einer MRT-Untersuchung von Erwachsenen verglichen. Untersuchungsmethodenbezogene Emotionen werden in der vorliegenden Studie bei Kindern und Jugendlichen beiderlei Geschlechts im Alter von 8 bis 17;11 Jahren, bei denen ein MRT des Cerebrums mit medizinischer Indikation durchgeführt wird, erhoben. Eine Stichprobe von Kindern und Jugendlichen, die mittels EEG mit medizinischer Indikation untersucht wird, dient als Vergleichsgruppe sowie eine Stichprobe von erwachsenen Patienten im Alter von 18 bis 65 Jahren, bei denen eine medizinisch indizierte MRT-Untersuchung durchgeführt wird. Die Studie befindet sich zurzeit in der Phase der Datenerhebung. Die Intention des folgenden Beitrags besteht darin, das Studiendesign des MRT-Forschungsprojekts vorzustellen.
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Genné, Marcelle. "Le développement humain au XXIe siècle." Études internationales 29, no. 2 (2005): 267–85. http://dx.doi.org/10.7202/703877ar.

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Au début des années 70, un retour en force à la conception du développement de F. Perroux centrée sur l'homme apparaît dans la littérature économique. Fidèles reflets des théories économiques, des indicateurs censés représenter le phénomène de développement reposant à la fois sur des changements mentaux et sociaux vont se multiplier. Récemment, la reformulation bipolaire - indicateurs de développement humain et indicateurs de dépenses humaines - sous forme d'indicateurs synthétiques globaux par le PNUD a engendré toute une série d'indicateurs socio-économiques modelés en fonction du concept même de développement choisi par leurs auteurs. Comme les deux visages de Janus, ces indicateurs débouchent notamment sur la définition d'une ligne de pauvreté minimale élargie aux dimensions sociales du développement. À l'instar des théories économiques, les indicateurs dans leur conception, après avoir établi une distinction très nette entre croissance et développement, passèrent par une phase d'expressions globales amalgamant croissance et développement pour revenir, en raison de la corrélation positive entre croissance et développement, à un indicateur d'efficience qui introduit à nouveau le clivage entre croissance et développement. Ce mouvement pendulaire ouvre grand la porte au défi du développement humain dans toute sa complexité, qu'il s'agit de relever au sein d'un monde où le processus de globalisation s'accélère de jour en jour.
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Tevaearai, Mueller, Chastonay, et al. "Coronary Bypass via a Mini-Thoracotomy: Advantages Become Evident with the Growing Experience of the Medical Team." Swiss Surgery 7, no. 1 (2001): 16–19. http://dx.doi.org/10.1024/1023-9332.7.1.16.

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But du travail: La chirurgie de revascularisation myocardique minimale invasive est fondamentalement différente de la méthode classique sous circulation extra-corporelle (CEC). Elle oblige à de nombreuses adaptations tant opératoire, qu'anesthésiologique et post-opératoire. Nous évaluons l'effet éventuel d'une phase d'apprentissage sur les résultats à court terme de cette nouvelle technique. Méthode: Nous présentons notre expérience de 20 patients ayant bénéficiés de cette approche de juillet 1997 à février 1999, en comparant du point de vue chirurgical et post-opératoire, 2 collectifs successifs de 10 patients chacun (groupe 1: 8H2F; 59.6 +/- 13.8 ans) aux 10 derniers (groupe 2: 8H/2F; 63.2 +/- 6.1 ans). Discussion: La progression est remarquable du point de vue opératoire et post-opératoire: Le temps de clampage de l'IVA est passé de 28.5 +/- 2.4 min. à 22.2 +/- 1.8 min. (p < 0.05) et le temps opératoire est passé de 125 +/- 4 à 97 +/- 5 min. (p < 0.005). La morbidité post-opératoire a régressé avec un taux de fibrillation auriculsire (FA) passant de 4/10 pour le groupe 1 à 1/10 pour le groupe 2, et un taux de pneumonie passant de 3/10 à 0. Le séjour aux soins intensifs est passé de 2.3 +/- 0.3 jours à 1.4 +/- 0.2 jours (p < 0.05). Le séjour hospitalier post-opératoire est passé de 8.5 +/- 0.9 à 4.7 +/- 0.5 jours (p < 0.005). Conclusion: Il existe clairement une phase d'apprentissage en chirurgie cardiaque mini-invasive. Cette période passée, les avantages immédiats de la technique apparaissent notamment par une diminution du temps opératoire, du séjour aux soins intensifs et du séjour post-opératoire.
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Hu, Qiguo, and Jinyin He. "Path Sets Combination Method for Reliability Analysis of Phased-Mission Systems Based on Cumulative Exposure Model." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 36, no. 5 (2018): 995–1003. http://dx.doi.org/10.1051/jnwpu/20183650995.

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The modeling of phased-mission systems is difficult and the solving process is complex because of the relevance of the phase tasks and the sharing of components existing in different phases or between phases. To solve the problem, based on the cumulative exposure model, the path sets combination method of phased-mission systems is proposed. Aiming at the problem of the cross-stage correlation of components and its different failure rate in each phase, the cumulative exposure model considering the historical damage of components is used to solve by obtaining the cumulative damage distribution of each component in each phase. Firstly, a phased-mission systems reliability model is build by mapping phased-mission system fault trees into a Bayesian network. By traversing the Bayesian network, the minimal path sets of each phase are obtained. Secondly, the disjoint formulas introduced by variable elimination method are used to do the disjoint operation of the minimal path sets of each phase and the conditional probability relations of the common components are used to reduce the minimal path sets scale. Finally, the minimum disjoint path sets of each phase are combined and summed according to the component conditional probability relation. The path sets combination method of phased-mission systems avoids the large conditional probability table, large storage and large computation problems caused by the excessive discrete states in the traditional Bayesian method and the problem that the PMS-BDD method has strict requirements for variable ordering and is difficult to solve the system reliability with multiple failure distribution types of components. In the end, a phased-mission systems reliability modeling and solving is carried out for a geosynchronous orbit satellite, and compared with the PMS-BDD method, which verifies the correctness of the method.
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Micoulaud Franchi, J. A., R. Richieri, C. Quiles, C. Balzani, C. Lançon, and J. Vion-Dury. "Aspects visuels et descriptifs de l’électroencéphalographie pendant les séances d’électroconvulsivothérapie." European Psychiatry 28, S2 (2013): 48. http://dx.doi.org/10.1016/j.eurpsy.2013.09.125.

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La surveillance électroencéphalographique (EEG) des séances d’électroconvulsivothérapie (ECT) est indispensable mais nécessite une connaissance minimale de la neurophysiologie et de la lecture de l’EléctroEncéphaloGramme (EEG) par le psychiatre. La lecture de l’EEG pendant les ECT nécessite un œil formé à la reconnaissance sur le tracé EEG de certaine forme spécifique, associée à l’utilisation d’un vocabulaire de description rigoureux. Ce poster a pour objectif de fournir une méthode illustrée de lecture de l’EEG pendant les ECT. Premièrement, les artefacts du signal EEG doivent être reconnus pour ne pas les confondre avec des activités épileptiformes. Deuxièmement, le déroulement de la crise doit être reconnu et décrit en phase : pré-critique, critiques (précritique, recrutante, tonique et clonique) et post-critique. Troisièmement, la qualification de la crise doit être posée par l’utilisation des termes de crise épileptique adéquate, optimale et prolongée. Cette démarche de lecture EEG pendant la séance ECT permet de détecter une crise épileptique prolongée afin de diminuer le risque à court terme d’état de mal épileptique post-ECT et à moyen terme le risque de mauvaise tolérance cognitive de la cure ECT. Elle permet également d’adapter de manière optimale les paramètres de stimulation à la prochaine séance d’ECT afin de maximiser l’efficacité des ECT. La lecture de l’EEG pendant les ECT ne résume pas l’entièreté de la conduite des cures ECT en psychiatrie. Cependant elle reste une démarche indispensable à l’aide à la prise de décision et souligne la place centrale que peut prendre la neurophysiologie clinique dans une stratégie thérapeutique psychiatrique.
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PANSU, BRIGITTE. "ARE SURFACES PERTINENT FOR DESCRIBING SOME THERMOTROPIC LIQUID CRYSTAL PHASES?" Modern Physics Letters B 13, no. 22n23 (1999): 769–82. http://dx.doi.org/10.1142/s0217984999000968.

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Surfaces, like minimal surfaces, are commonly used to describe intricate thermotropic liquid crystalline phase structures: cubic phases, TGB phases, quadratic phases, blue phases, and smectic blue phases. Such geometrical models are good tools to visualize the competition between the various molecular interactions generating these phases although they often cannot lead to the prediction of the thermodynamic phase diagrams.
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Grelier, Benjamin, Gilles Drogue, Michel Pirotton, Pierre Archambeau, and Emilie Gernez. "Peut-on estimer l’effet du changement climatique sur l’écoulement à l’exutoire d’un bassin sans modèle pluie-débit ? un test de la méthode de transfert climat-écoulement par régression dans le bassin transnational de la meuse." Climatologie 14 (2017): 48–81. http://dx.doi.org/10.4267/climatologie.1232.

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L’étude de l’impact futur du changement climatique sur l’écoulement à l’exutoire d’un bassin repose généralement sur l’utilisation d’un modèle pluie-débit. Cet article explore les potentiels et les limites d’une stratégie alternative, fondée sur une méthode de transfert climat-écoulement par régression multiple. Cette méthode s’appuie sur un séquençage d’une régression des moindres carrés partiels (PLS) et d’une régression linéaire multiple (RLM) destinée à estimer des indices d’écoulement via les meilleurs prédicteurs climatiques identifiés par régression PLS. Les modèles de régression RLM paramétrés sur des critères quantitatifs, et par jugement expert des conditions hydro-climatiques actuelles, sont ensuite forcés par des sorties de modèles de climat pour produire des projections hydrologiques à différents horizons. L’application de la méthode de transfert climat-écoulement par régression multiple à deux cours d’eau du bassin de la Meuse décrits à partir d’indices d’écoulement de basses, de moyennes et de hautes eaux, montre que : i) cette méthode fonctionne convenablement pour certains indices d’écoulement seulement; ii) une connaissance minimale de la variabilité climatique à l’échelle régionale (apportée dans notre cas, par la pression atmosphérique et le gradient régional de pression en surface et à 500 hPa) suffit à décrire de façon acceptable le forçage climatique sur ces indices; iii) le jugement expert est indispensable pour identifier les prédicteurs climatiques hydrologiquement pertinents; iv) la force du lien entre climat et écoulement est propre à chaque bassin versant; v) les changements d’écoulement prédits par la méthode de transfert climat-écoulement sous scénarios climatiques CMIP5 (Coupled Model Intercomparison Project Phase 5) pour les prochaines décennies sont en accord avec ceux prédits par la modélisation pluie-débit. Au stade de nos investigations, trois limites majeures de la méthode de transfert climat-écoulement par régression multiple ont été identifiées : 1) elle exige de longues chroniques hydro-climatiques; 2) elle a tendance à sous-estimer la variabilité interannuelle de l’écoulement à l’exutoire des bassins testés; 3) elle n’est pas en capacité de garantir avec certitude l’évolution des indices d’écoulement dans des conditions climatiques très différentes de celles de la période d’observation.
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KACZOREK, Tadeusz. "Minimal-phase positive electrical circuits." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 3 (2016): 184–91. http://dx.doi.org/10.15199/48.2016.03.43.

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MARTIN, I., G. ORTIZ, A. V. BALATSKY, and A. R. BISHOP. "COMPETING QUANTUM ORDERINGS IN CUPRATE SUPERCONDUCTORS: A MINIMAL MODEL." International Journal of Modern Physics B 14, no. 29n31 (2000): 3567–76. http://dx.doi.org/10.1142/s0217979200003630.

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We present a minimal model for cuprate superconductors. At the unrestricted mean-field level, the model produces homogeneous superconductivity at large doping, striped superconductivity in the underdoped regime and various antiferromagnetic phases at low doping and for high temperatures. On the underdoped side, the superconductor is intrinsically inhomogeneous and global phase coherence is achieved through Josephson-like coupling of the superconducting stripes. The model is applied to calculate experimentally measurable ARPES spectra.
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Leonard, Angela, and Pat Mayers. "Parents’ lived experience of providing kangaroo care to their preterm infants." Health SA Gesondheid 13, no. 4 (2008): 16–28. http://dx.doi.org/10.4102/hsag.v13i4.401.

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Premature and low birthweight infants pose particular challenges to health services in South Africa. While there is good evidence to demonstrate the benefits of kangaroo care in low birthweight infants, limited research has been conducted locally on the experiences of parents who provide kangaroo care to their preterm infants. This phenomenological study explores the lived experience of parents who provided their preterm infants with kangaroo care at a tertiary-level maternity centre in the Western Cape. In-depth interviews were conducted with six parents: four mothers and two fathers. Data was analysed using an adaptation of the approaches described by Colaizzi (1978:48-71) and Hycner (1985:280-294). To ensure trustworthiness, the trustworthiness criteria described by Guba and Lincoln (1989:242-243) were applied. Kangaroo care is a phased process, each phase bringing a unique set of experiences. The eight themes that emerged are described: unforeseen, unprepared and uncertain - the experience of birth; anxiety and barriers; an intimate connection; adjustments, roles and responsibilities; measuring success; a network of encouragement and support; living-in challenges; and living with the infant outside of hospital. Challenges facing health care providers are described and recommendations for information about kangaroo care and support for parents are made.
 
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 Vroeggebore babas en babas met ’n lae geboortegewig stel besondere uitdagings vir Suid-Afrikaanse gesondhiedsdienste. Daar bestaan goeie bewyse dat die kangaroesorgmetode voordelig is vir babas met ’n laegeboortegewig, dog is minimale plaaslike navorsing gedoen oor die ondervindinge van ouers wat hierdie metode gebruik om vir hul vroeggebore babas te sorg. Hierdie fenomenologiese studie verken die geleefde ervaringe van ouers wat vir hulle vroeggebore babas deur middel van die kangaroesorgmetode in ’n tersiêre kraamsentrum in die Weskaap gesorg het. Data is ingesamel deur in-diepte onderhoude met ses ouers te voer: vier moeders and twee vaders van vroeggebore babas. Data is ontleed volgens ’n verwerking van die metodes soos deur Colaizzi (1978:48-71) en Hycner (1985:280-294) beskryf. Om betroubaarheid te verseker, is die betroubaarheidskriteria van Guba en Lincoln (1989:242-243) toegepas. Kangaroesorg is ’n geleidelike proses; elke fase lei tot ‘n unieke stel ondervindinge. Agt temas is uit die data geïdentifiseer: Onverwags, onvoorbereid en onseker - die geboorte-ervaring; angstigheid and hindernisse; ’n intieme verband; aanpassings, rolle en verantwoordelikhede; die meting van sukses; ’n netwerk van aanmoediging en ondersteuning; die uitdagings van binne die hospitaal leef; saamleef met die baba buite die hospital. Uitdagings wat gesondheidspersonnel te voorstaan kom en aanbevelings oor inligting met betrekking tot kangaroesorg en ondersteuning aan ouers word voorgestel.
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Dissertations / Theses on the topic "Phase minimale"

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Parra, Thierry. "Modelisation du transistor mesfet gaas utilise en regime de forts signaux. Application a la conception d'un limiteur de puissance monolithique a distorsion de phase minimale." Toulouse 3, 1991. http://www.theses.fr/1991TOU30161.

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Nous presentons dans ce memoire l'analyse de la distorsion de phase qui apparait lors du fonctionnement fort signal du transistor a effet de champ sur arseniure de gallium (tec gaas), ainsi que la modelisation non lineaire mise en uvre dans le but de concevoir un limiteur de puissance monolithique a distorsion de phase minimale. Pour mener cette etude, nous avons effectue d'abord une caracterisation electrique approfondie d'un lot de tec (caracterisations continues, hyperfrequence petit signal et hyperfrequence fort signal). Ce travail nous a permis de degager les principales origines du phenomene et d'enoncer un critere de tri des composantes susceptibles, a l'interieur d'un lot, d'introduire une distorsion de phase minimale. Nous avons de plus elabore un modele phenomenologique non lineaire du mesfet permettant de rendre compte de la distorsion de phase au plan theorique, dans l'objectif d'obtenir des resultats de simulation suffisamment fiables et precis pour autoriser la conception de circuits integres micro-ondes monolithiques (mmic). L'utilisation de ces outils de simulation nous a conduit a proposer une topologie originale des circuits d'adaptation et de polarisation du composant permettant une minimisation de la distorsion de phase. Cette topologie a ete utilisee ensuite pour la conception d'un limiteur de puissance monolithique qui a ete par la suite realise et dont nous presentons les performances mesurees. Enfin nous avons valide notre etude pour d'autres applications du tec gaas, telles la conception d'un amplificateur a puissance variable (realise en technologie hybride) et la simulation d'un lineariseur par pre-distorsion
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Dubois, Véronique. "Préparation de peptides antimicrobiens à partir de l'hydrolyse enzymatique de deux protéines : l'hémoglobine bovine et l'α-lactalbumine bovine". Lille 1, 2006. https://ori-nuxeo.univ-lille1.fr/nuxeo/site/esupversions/5e3ef719-2eae-45e3-8aa5-e9c719abc31b.

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Vingt quatre peptides antimicrobiens ont été isolés par CLHP à partir d'un hydrolysat pepsique d'hémoglobine bovine à 3% de degré d'hydrolyse. Cinq peptides antimicrobiens : α 107141, α 107-136, α 133-141, α 137-141 et β 126-145 ont été purifiés en une seule étape de CLHP. Leurs CMI, effet hémolytique ainsi que quelques propriétés structurales ont pu être déterminés. L'amélioration des méthodes de préparation de ces peptides antimicrobiens a montré que: l'augmentation de la température d'incubation permettait d'augmenter les concentrations des peptides antimicrobiens, et que le pH d'incubation avait un effet sur la sélectivité de l'enzyme en favorisant les coupures en Cterminal de la Leucine lors de l'hydrolyse en conditions dénaturantes. En conditions natives, le pH 3,5 a permis l'obtention de peptides antimicrobiens absents lors de l'hydrolyse menée à pH 4,5. La mise en place d'un système biphasique eau/butan-2-ol a permis d'extraire sélectivement plusieurs peptides antimicrobiens. Un nouveau modèle d'étude a été mis en place à partir de l'α-Lactalbumine. Après avoir étudié différents paramètres d'hydrolyse, le choix s'est porté sur l'hydrolyse chymotrypsique de l'apoforme de l'α-Lactalbumine dans le tampon phosphate de sodium 100 mM pH 7,4 pour rechercher des peptides antimicrobiens. La population peptidique au cours de cette cinétique d'hydrolyse. A été établie par différentes techniques de spectrométrie de masse. Une activité antimicrobienne a été mise en évidence au sein de plusieurs hydrolysats chymotrypsique de l'α-Lactalbumine. Deux hydrolysats se sont montrés particulièrement actifs: l'hydrolysat de 30 minutes et celui de 12H.
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Busson, Sylvain. "Individualisation d'indices acoustiques pour la synthèse binaurale." Phd thesis, Université de la Méditerranée - Aix-Marseille II, 2006. http://tel.archives-ouvertes.fr/tel-00012023.

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La synthèse binaurale est la technique de spatialisation sonore la plus proche de<br />l'écoute naturelle. Elle permet un rendu spatialisé d'une source monophonique à une po-<br />sition donnée avec seulement deux filtres qui correspondent aux oreilles gauche et droite :<br />les HRTF (Head Related Transfer Function). L'inconvénient majeur de la technique bi-<br />naurale repose sur le fait que les HRTF, liées à la morphologie de l'auditeur, sont propres<br />à chaque utilisateur. Une écoute avec des HRTF non-individuelles comporte des artefacts<br />audibles. Il faut donc acquérir des HRTF individuelles. Cette thèse aborde le problème<br />de l'individualisation de la synthèse binaurale dans le cadre de son implémentation en un<br />retard pur, la différence interaurale de temps (ITD), et un filtre à phase minimale déter-<br />miné par le module de la HRTF. Le travail sur l'ITD permet de valider l'implémentation<br />choisie même pour les positions où les HRTF sont mal décrites par des filtres à phase<br />minimale et permet de déterminer, parmi les méthodes classiques de calcul de l'ITD,<br />celles qui estiment une ITD proche de la perception. Une étude expérimentale est aussi<br />menée pour établir la résolution de l'ITD avec l'angle d'élévation. Les résultats indiquent<br />la nécessité perceptive de reproduire les variations de l'ITD en élévation. Une nouvelle<br />formule d'estimation de l'ITD créée sur la base d'un modèle de tête sphérique, la formule<br />de déplacement des oreilles (FDO), est développée pour rendre compte de ces variations.<br />L'optimisation des paramètres de cette formule aux ITD de toute une base de données<br />de HRTF permet d'entrevoir une formulation moyenne convenant pour un grand nombre<br />de personne et pour de nombreuses applications. L'étude s'est ensuite focalisée sur la<br />modélisation du module spectral (filtre à phase minimale). Le travail réalisé sur l'appli-<br />cation des méthodes de calcul par éléments de frontière (BEM pour Boundary Element<br />Method) pour l'acquisition de HRTF, indique que cette méthode, peut notamment être<br />utilisée en complément des mesures pour l'acquisition de la partie basse fréquence des<br />HRTF. Une approche originale, qui applique des techniques d'apprentissage statistique,<br />est proposée et étudiée pour la modélisation de HRTF. Un réseau de neurones artificiels<br />(RNA) est entra^³né pour calculer des HRTF d'un individu à partir de la connaissance<br />des HRTF mesurées en un nombre réduit de positions. Les premiers résultats sont en-<br />courageants : le modèle permet d'atteindre un degré assez fin d'individualisation, ce qui<br />suggère un protocole simplifié d'acquisition de HRTF. Un faible nombre de mesures est<br />acquis et les autres sont prédites par le modèle.
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Brueni, Dennis J. "Minimal PMU placement for graph observability : a decomposition approach /." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-10312009-020314/.

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Kachenoura, Amar. "Traitement Aveugle de Signaux Biomédicaux." Phd thesis, Université Rennes 1, 2006. http://tel.archives-ouvertes.fr/tel-00359155.

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Ce mémoire aborde l'analyse et le traitement de données biomédicales. L'objectif est d'extraire des informations nécessaires au diagnostic de certaines pathologies. Plus précisément, ce rapport de thèse peut être scindé en deux parties. La première concerne l'élaboration d'un système ambulatoire multi-varié qui permette d'explorer les fonctions neurologiques nécessaires au diagnostic de différents troubles du sommeil. Des méthodes de séparation aveugle de sources, développées pour des mélanges instantanés, ont été étudiées et appliquées pour répondre à ce problème. La seconde partie porte sur l'étude du système nerveux autonome. Le but est de caractériser le profile sympathique et parasympathique des patients. Face aux différents problèmes mathématiques rencontrés, nous avons élaboré de nouvelles méthodes d'estimation de phase. Ces dernières ont fait l'objet d'une étude comparative au travers de simulations numériques.
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Impéror-Clerc, Marianne. "Étude de transition de phase vers les phases cubiques des systèmes eau/surfactant." Paris 11, 1992. https://tel.archives-ouvertes.fr/tel-01989797.

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Les phases cubiques des systèmes binaires eau/surfactant sont un cas d'organisation liquide-cristalline de la matière très surprenant. Leur structure allie, a un ordre local liquide, une périodicité tridimensionnelle à l'échelle mésoscopique, qui en fait de véritables cristaux de films fluides. Elle se caractérise également par une topologie bicontinue tout à fait remarquable. Partant de l'observation de la croissance en épitaxie d'une phase cubique (de groupe d'espace Ia3d, le plus fréquent) à partir des mésophases lamellaire et hexagonale, nous nous sommes attaches à décrire comment, d'un point de vue purement structural, il est possible de déduire la structure cubique de celles, plus simples, de ces autres mésophases. Tout d'abord, la croissance en épitaxie de la phase cubique a été observée en diffusion des rayons X sur des échantillons monocristallins, ainsi qu'au microscope polarisant. Des désordres caractéristiques de chacune des mésophases, liés à leur nature liquide cristalline, ont également été mis en évidence grâce aux clichés de diffraction X et analyses. Nous avons ensuite utilisé des modèles géométriques récents, pour poser le problème du passage d'une phase à l'autre en termes purement topologiques de transformations de surfaces. Des intermédiaires possibles pour les deux transitions ont été conçus : les surfaces tours pour la transition hexagonale/cubique et les tunnels entre plans pour la transition lamellaire/cubique, expliquant notamment l'apparition de la topologie bicontinue de la phase cubique.
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Kost, Jeffrey David, and Jeffrey David Kost. "Phase Transitions in the Early Universe: The Cosmology of Non-minimal Scalar Sectors." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/625467.

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Light scalar fields such as axions and string moduli can play an important role in early-universe cosmology. However, many factors can significantly impact their late-time cosmological abundances. For example, in cases where the potentials for these fields are generated dynamically --- such as during cosmological mass-generating phase transitions --- the duration of the time interval required for these potentials to fully develop can have significant repercussions. Likewise, in scenarios with multiple scalars, mixing amongst the fields can also give rise to an effective timescale that modifies the resulting late-time abundances. Previous studies have focused on the effects of either the first or the second timescale in isolation. In this thesis, by contrast, we examine the new features that arise from the interplay between these two timescales when both mixing and time-dependent phase transitions are introduced together. First, we find that the effects of these timescales can conspire to alter not only the total late-time abundance of the system --- often by many orders of magnitude --- but also its distribution across the different fields. Second, we find that these effects can produce large parametric resonances which render the energy densities of the fields highly sensitive to the degree of mixing as well as the duration of the time interval over which the phase transition unfolds. Finally, we find that these effects can even give rise to a "re-overdamping" phenomenon which causes the total energy density of the system to behave in novel ways that differ from those exhibited by pure dark matter or vacuum energy. All of these features therefore give rise to new possibilities for early-universe phenomenology and cosmological evolution. They also highlight the importance of taking into account the time dependence associated with phase transitions in cosmological settings. In the second part of this thesis, we proceed to study the early-universe cosmology of a Kaluza-Klein (KK) tower of scalar fields in the presence of a mass-generating phase transition, focusing on the time-development of the total tower energy density (or relic abundance) as well as its distribution across the different KK modes. We find that both of these features are extremely sensitive to the details of the phase transition and can behave in a variety of ways significant for late-time cosmology. In particular, we find that the interplay between the temporal properties of the phase transition and the mixing it generates are responsible for both enhancements and suppressions in the late-time abundances, sometimes by many orders of magnitude. We map out the complete model parameter space and determine where traditional analytical approximations are valid and where they fail. In the latter cases we also provide new analytical approximations which successfully model our results. Finally, we apply this machinery to the example of an axion-like field in the bulk, mapping these phenomena over an enlarged axion parameter space that extends beyond those accessible to standard treatments. An important by-product of our analysis is the development of an alternate "UV-based" effective truncation of KK theories which has a number of interesting theoretical properties that distinguish it from the more traditional "IR-based" truncation typically used in the literature.
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Vallet, François. "Thermodynamique unidimensionnelle et structures bidimensionnelles de quelques modèles pour des systèmes incommensurables." Paris 6, 1986. http://www.theses.fr/1986PA066151.

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Généralisation de l'approche d’Aubry du modèle de Frenkel-Kontorova au cas d'une structure incommensurable 1d à température non nulle, avec utilisation d'une méthode de renormalisation par blocs, puis au modèle multidimensionnel à t=o. Résolution du modèle en 2d et mise en évidence d'une grande similitude avec le cas 1d (transition par brisure d'analyticité, expression de l'énergie, énergies des défauts, diagramme de phase, qui est un escalier du diable complet généralisé, à transitions du 1er ordre). Modèle exact d'un hélimagnétique anisotrope sous champ externe.
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Hudson, Christopher Allen. "Single-Phase, Single-Switch, Sensorless Switched Reluctance Motor Drive Utilizing a Minimal Artificial Neural Net." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/34735.

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Artificial Neural Networks (ANNs) have proved to be useful in approximating non- linear systems in many applications including motion control. ANNs advocated in switched reluctance motor (SRM) control typically have a large number of neurons and several layers which impedes their real time implementation in embedded sys- tems. Real time estimation at high speeds using these ANNs is diffcult due to the high number of operations required to process the ANN controller. An insuffcient availability of time between two sampling intervals limits the available computation time for both processing the neural net and the other functions required for the motor drive. One ideal application of ANNs in SRM control is rotor position estimation. Due to reliability issues, elimination of the rotor position sensors is absolutely required for high volume, high speed and low cost applications of SRM's. ANNs provide a means by which drive designers can implement position sensorless drive technology that is both robust and easily implemented. It is demonstrated that a new and novel ANN configuration can be implemented for accurate rotor position estimation in a sensorless SRM drive. Consisting of just 4 neurons, the neural estimator is the smallest of its kind for SRM rotor position estimation. The breakthrough that provided the reduction was the addition of a non- linear input. Typical input spaces for SRM position neural estimators consist of both current,and fux-linkage. The neural network was trained on-line using these inputs and a third, non-linear input provided by a preprocessed product of the two typical inputs.<br>Master of Science
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Engle, Stanley E. "Roundoff algorithms for digital phase shifters that minimize beam shift/Stanley E. Engle." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23765.

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The performance of a phased array antenna depends upon the phase and amplitude distribution across the aperture. A continuous 13-near phase distribution is required for an efficient focussed beam, but practical phase shifters are digital devices and can only provide an approximation to a linear phase distribution. Consequently some type of roundoff criteria must be established. The method of roundoff affects the radiation pattern characteristics such as beam location and sidelobe level. Accurate target tracking requires that a radar have a small beam pointing error. Low sidelobes are also desirable to prevent jamming and the illumination of clutter. Therefore the goal was to select a roundoff criterion that provides a phase distribution across the aperture to minimize both the beam shift and the sidelobe levels, while simultaneously maximizing the gain. The methods examined are referred to regular roundoff, weighted random roundoff, running sum roundoff and symmetric running sum roundoff. The first two are in common use, but the third and fourth are new methods examined in this paper. It was demonstrated that the latter two have the beam shift of the four roundoff methods, without significantly degrading the other pattern properties. roundoff; beam shift; phase shifters; bitsize; pointing error; null depth: sidelobe
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Books on the topic "Phase minimale"

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Engle, Stanley E. Roundoff algorithms for digital phase shifters that minimize beam shift. Naval Postgraduate School, 1992.

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K, Macgowan Christopher. Phase-encode reordering to minimize errors caused by motion in mari. National Library of Canada, 1996.

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Smith, R. Stephen. Gasless laparoscopy with conventional instruments: The next phase in minimally invasive surgery. Norman Pub., 1993.

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Baillie, S. W. Tracking performance requirements for rotorcraft instrument approaches to reduced minima. Phase 1 - Preliminary study. National Research Council Canada, Institute for Aerospace Research, 1991.

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Achkasov, Evgeniy, Andrey Pugaev, Maksim Zabelin, and Vladislav Posudnevskiy. Acute pancreatitis: clinic, diagnosis, treatment. INFRA-M Academic Publishing LLC., 2019. http://dx.doi.org/10.12737/995531.

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The textbook consistently highlights the issues of anatomy and physiology of the pancreas, etiology, pathogenesis, classification, clinical picture, diagnosis and treatment of acute pancreatitis. Special attention is paid to determining the severity and prognosis of the disease. Modern approaches to treatment taking into account the severity of the disease, features of suppression of secretory activity of the pancreas and the role of nutritional support in the complex treatment of acute pancreatitis are presented. Attention is drawn to the timing of minimally invasive interventions for uninfected and infected postnecrotic fluid formations, as well as methods of surgical treatment in the phase of purulent-necrotic complications of acute pancreatitis. For the first time in the educational edition psychological aspects of rehabilitation of surgical patients are presented. Mastering the material of the textbook is facilitated by test tasks and questions for self-control.&#x0D; Meets the requirements of the Federal state educational standards of higher education of the last generation.&#x0D; It is intended for students of medical universities, clinical residents and doctors studying in the system of additional professional education, specialty "Surgery".
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Lu, Ko Ke. Design of group-delay equalizers and linear-phase filters using minimax optimization. 1986.

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Sterelny, Kim. The Pleistocene Social Contract. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197531389.001.0001.

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No human now gathers for himself or herself the essential resources for life: food, shelter, clothing and the like. Humans are obligate co-operators, and this has been true for tens of thousands of years; probably much longer. In this regard, humans are very unusual. In the living world more generally, cooperation outside the family is rare. Though it can be very profitable, it is also very risky, as cooperation makes an agent vulnerable to incompetence and cheating. This book presents a new picture of the emergence of cooperation in our lineage, developing through four fairly distinct phases. Our trajectory began from a baseline that was probably fairly similar to living great apes, who cooperate, but in fairly minimal ways. As adults, they rarely depend on others when the outcome really matters. This book suggests that cooperation began to be more important for humans through an initial phase of cooperative foraging generating immediate returns from collective action in small mobile bands. This established in our lineage about 1.8 million years ago, perhaps earlier. Over the rest of the Pleistocene, cooperation became more extended in its social scale, with forms of cooperation between bands gradually establishing, and in spatial and temporal scale too, with various forms of reciprocation becoming important. The final phase was the emergence of cooperation in large scale, hierarchical societies in the Holocene, beginning about 12,000 years ago. This picture is nested in a reading of the archaeological and ethnographic record, and twinned to an account of the gradual elaboration of cultural learning in our lineage, making cooperation both more profitable and more stable.
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Luckett, Tim, and Katherine L. P. Reid. Speech and language therapy in palliative care. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199656097.003.0410.

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Palliative care is an emerging specialty within the field of speech and language therapy (SLT); the discipline is currently under-represented both in specialist services and the research literature. This belies the fact that many patients in the palliative phase suffer problems with swallowing (dysphagia) and communication, the core domains of SLT practice. This chapter provides an overview of difficulties encountered in these domains by people with life-limiting conditions together with common approaches to assessment and management. Assessment and management should be person-centred, integrated into multidisciplinary care, and seek to maintain function via minimal intervention for maximum gain. More research is needed to inform appropriately integrated, person-centred models of SLT provision that enable difficulties with communication and swallowing to be addressed alongside other symptoms and care needs. It seems likely that difficulties in these domains are currently under-identified and under-treated in many cases.
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Neyrinck, Arne P., Patrick Ferdinande, Dirk Van Raemdonck, and Marc Van de Velde. Donor organ management. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199687039.003.0034.

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Organ transplantation is the standard treatment modality for end-stage organ disease in selected cases. Two types of potential organ donors can be identified: the brain-dead ‘heart-beating donors’, referred to as DBD (donation after brain death), and the warm ischaemic ‘non-heart-beating donors’, referred to as DCD (donation after circulatory death). Brain death induces several physiological changes in the DBD donor. An autonomic storm is characterized by massive catecholamine release, followed by autonomic depletion during a vasoplegic phase. This is associated with several hormonal changes (suppression of vasopressin, the hypothalamic-pituitary-adrenal axis, and the hypothalamic-pituitary-thyroid axis) and an inflammatory response. These physiological changes form the basis of organ donor management, including cardiovascular stabilization and hormonal therapy (including vasopressin and analogues, thyroid hormone, and cortisol). Donor management is the continuation of critical care, with a shift towards individual organ stabilization. An aggressive approach to maximize organ yield is recommended; however, many treatment strategies need further investigation in large randomized trials. DCD donors have now evolved as a valid alternative to increase the potential donor pool and challenge the clinician with new questions. Optimal donor comfort therapy and end-of-life care are important to minimize the agonal phase. A strict approach towards the determination of death, based on cardiorespiratory criteria, is prerequisite. Novel strategies have been developed, using ex situ organ perfusion as a tool, to evaluate and recondition donor organs. They might become more important in the future to further optimize organ quality.
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Cross, Rob, and Roger Spencer. Sustainable Gardens. CSIRO Publishing, 2009. http://dx.doi.org/10.1071/9780643097988.

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The third title in the CSIRO Gardening Guide series, Sustainable Gardens by Roger Spencer and Rob Cross shows how horticulture can contribute towards a more sustainable future. Written for home gardeners, professional horticulturists, landscapers, and all those passionate about cultivated landscapes, this book examines the steps we can take towards harmonising gardening activity with the cycles of nature. &#x0D; Two outstanding botanists from the Royal Botanical Gardens in Melbourne, Roger and Rob have produced a genuine gardening bible for our times. They show how every gardener – both professional and amateur – can contribute positively to environmental stewardship. Gardens may be consumers of resources, but the negative effects of this consumption can be minimised and can be offset by some of the positive contributions gardens make.&#x0D; Roger and Rob explain the connections between human activity, resource depletion, and environmental degradation. They show how to conduct an audit of gardening practices, materials, and results so that every gardener can measure the impact he or she is having on nature. &#x0D; They show: how to minimise the impacts on nature of our consumption of water, materials and energy in the garden; how to make gardens more environmentally friendly through design, construction and maintenance phases; the importance of biodiversity and how horticulture can help protect natural systems; and the role that gardening can play in alleviating the environmental impacts of food production.&#x0D; Checklists are provided so that gardeners can ensure they are taking the most sustainable path through each phase of gardening – design, construction, maintenance. The book ends with a guide round an existing garden that combines physical beauty with sustainability, and discusses future trends for sustainable horticulture. &#x0D; In an increasingly urbanised world, parks and gardens are our main point of contact with nature. If we can maximise the environmental benefits of our gardens, public spaces and landscapes, we will make a huge contribution to sustainable living. This book if the first to show us how.
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Book chapters on the topic "Phase minimale"

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Gharieb, W. "Fuzzy Control to Non-minimal Phase Processes." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/3-540-48774-3_42.

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Bozzano, Marco, Alessandro Cimatti, Anthony Fernandes Pires, Alberto Griggio, Martin Jonáš, and Greg Kimberly. "Efficient SMT-Based Analysis of Failure Propagation." In Computer Aided Verification. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-81688-9_10.

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AbstractThe process of developing civil aircraft and their related systems includes multiple phases of Preliminary Safety Assessment (PSA). An objective of PSA is to link the classification of failure conditions and effects (produced in the functional hazard analysis phases) to appropriate safety requirements for elements in the aircraft architecture. A complete and correct preliminary safety assessment phase avoids potentially costly revisions to the design late in the design process. Hence, automated ways to support PSA are an important challenge in modern aircraft design. A modern approach to conducting PSAs is via the use of abstract propagation models, that are basically hyper-graphs where arcs model the dependency among components, e.g. how the degradation of one component may lead to the degraded or failed operation of another. Such models are used for computing failure propagations: the fault of a component may have multiple ramifications within the system, causing the malfunction of several interconnected components. A central aspect of this problem is that of identifying the minimal fault combinations, also referred to as minimal cut sets, that cause overall failures.In this paper we propose an expressive framework to model failure propagation, catering for multiple levels of degradation as well as cyclic and nondeterministic dependencies. We define a formal sequential semantics, and present an efficient SMT-based method for the analysis of failure propagation, able to enumerate cut sets that are minimal with respect to the order between levels of degradation. In contrast with the state of the art, the proposed approach is provably more expressive, and dramatically outperforms other systems when a comparison is possible.
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Anjum, Muhammad, Moizzah Asif, and Jonathan Williams. "Towards an Optimal Deep Neural Network for SOC Estimation of Electric-Vehicle Lithium-Ion Battery Cells." In Springer Proceedings in Energy. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_2.

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AbstractThis paper has identified a minimal configuration of a DNN architecture and hyperparameter settings to effectively estimate SOC of EV battery cells. The results from the experimental work has shown that a minimal configuration of hidden layers and neurons can reduce the computational cost and resources required without compromising the performance. This is further supported by the number of epochs taken to train the best DNN SOC estimations model. Hence, demonstrating that, the risk of overfitting estimation models to training datasets, can also be subsided. This is further supported by the generalisation capability of the best model demonstrated through the decrease in error metrics values from test phase to those in validation phase.
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Kyrou, Dimitra, and Human Mousavi Fatemi. "Luteal Phase Support in Natural Cycle and Minimal Stimulation IVF." In Minimal Stimulation and Natural Cycle In Vitro Fertilization. Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-1118-1_9.

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Glancy, Jonathan, Roderich Groß, and Stuart P. Wilson. "A Minimal Model of the Phase Transition into Thermoregulatory Huddling." In Biomimetic and Biohybrid Systems. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39802-5_41.

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Hauptman, Herbert. "A minimal principle in the phase problem of x-ray crystallography." In Global Minimization of Nonconvex Energy Functions: Molecular Conformation and Protein Folding. American Mathematical Society, 1995. http://dx.doi.org/10.1090/dimacs/023/06.

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Haseler, Stephen. "The Next Phase: The Brave New World of the Minimal State." In The Super-Rich. Palgrave Macmillan UK, 2000. http://dx.doi.org/10.1057/9780230285965_7.

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Bendík, Jaroslav, Ahmet Sencan, Ebru Aydin Gol, and Ivana Černá. "Timed Automata Relaxation for Reachability." In Tools and Algorithms for the Construction and Analysis of Systems. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72016-2_16.

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AbstractTimed automata (TA) have shown to be a suitable formalism for modeling real-time systems. Moreover, modern model-checking tools allow a designer to check whether a TA complies with the system specification. However, the exact timing constraints of the system are often uncertain during the design phase. Consequently, the designer is able to build a TA with a correct structure, however, the timing constraints need to be tuned to make the TA comply with the specification.In this work, we assume that we are given a TA together with an existential property, such as reachability, that is not satisfied by the TA. We propose a novel concept of a minimal sufficient reduction (MSR) that allows us to identify the minimal set S of timing constraints of the TA that needs to be tuned to meet the specification. Moreover, we employ mixed-integer linear programming to actually find a tuning of S that leads to meeting the specification.
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Albano, A. M., L. Smilowitz, P. E. Rapp, G. C. de Guzman, and T. R. Bashore. "Dimension calculations in a minimal embedding space: Low-dimensional attractors for human electroencephalograms." In The Physics of Phase Space Nonlinear Dynamics and Chaos Geometric Quantization, and Wigner Function. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/3-540-17894-5_307.

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Mason, J. C., and S. J. Wilde. "A complex minimax algorithm for phase-only adaptation in antenna arrays." In Algorithms for Approximation II. Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-3442-0_40.

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Conference papers on the topic "Phase minimale"

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Klemes, Marek, Halim Boutayeb, and Fayez Hyjazie. "Minimal-hardware 2-D steering of arbitrarily large circular arrays (combining axial patterns of phase-modes)." In 2016 IEEE International Symposium on Phased Array Systems and Technology (PAST). IEEE, 2016. http://dx.doi.org/10.1109/array.2016.7832554.

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Smith, Peter R., David M. J. Cowell, Benjamin Raiton, et al. "A PLL-based phased array method to minimize phase quantization errors and reduce phasing-lobes." In 2010 International Ultrasonics Symposium. IEEE, 2010. http://dx.doi.org/10.1109/ultsym.2010.5935949.

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Sugita, Yasunori, and Naoyuki Aikawa. "Minimax approximation of minimum phase FIR filters." In Proceedings of ICASSP '02. IEEE, 2002. http://dx.doi.org/10.1109/icassp.2002.5745598.

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Sugita and Aikawa. "Minimax approximation of minimum phase FIR filters." In IEEE International Conference on Acoustics Speech and Signal Processing ICASSP-02. IEEE, 2002. http://dx.doi.org/10.1109/icassp.2002.1004859.

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Shukoor, Mohammed Ashfaq, and Vishwani D. Agrawal. "A Two Phase Approach for Minimal Diagnostic Test Set Generation." In 2009 14th IEEE European Test Symposium (ETS). IEEE, 2009. http://dx.doi.org/10.1109/ets.2009.33.

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Ladaci, Samir, Souad Chettah, and Khatir Khettab. "Direct fractional adaptive pole placement control for minimal phase systems." In 2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA). IEEE, 2015. http://dx.doi.org/10.1109/sta.2015.7505181.

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Varma, D. S. Mohan, and S. Sujatha. "Minimal Kinematic Model for Inverse Dynamic Analysis of Gait." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39942.

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The objective of this work is to develop an inverse dynamics model that uses minimal kinematic inputs to estimate the ground reaction force (GRF). The human body is modeled with 14 rigid segments and a circular ankle-foot-roll-over shape (AFROS) for the foot-ground interaction. The input kinematic data and body segment parameter estimates are obtained from literature. Optimization is used to ensure that the kinematic data satisfy the constraint that the swing leg clears the ground in the single support (SS) phase. For the SS phase, using the segment angles as the generalized degrees of freedom (DOF), the kinematic component of the GRF is expressed analytically as the summation of weighted kinematics of individual segments. The weighting functions are constants that are functions of the segment masses and center of mass distances. Using this form of the equation for GRF, it is seen that the kinematics of the upper body segments do not contribute to the vertical component GRFy in SS phase enabling the reduction of a 16-DOF 14-segment model to a 10-DOF 7-segment model. It is seen that the model can be further reduced to a 3-DOF model for GRFy estimation in the SS phase of gait. The horizontal component GRFx is computed assuming that the net GRF vector passes through the center of mass (CoM). The GRF in double support phase is assumed to change linearly from one foot to the other. The sagittal plane internal joint forces and moments acting at the ankle, knee and hip are computed using the 3-DOF model and the 10-DOF model and compared with the results from literature. An AFROS and measurements of the stance shank and thigh rotations in the sagittal plane, and of the lower trunk (or pelvis) in the frontal plane provide sufficient kinematics in an inverse dynamics model to estimate the GRF and joint reaction forces and moments. Such a model has the potential to simplify gait analysis.
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Opiyo, Eliab Z., Imre Horva´th, and Joris S. M. Vergeest. "Case Studies on the Application of the Abstract Prototyping Strategy in the Development of Design Support Software." In ASME 2002 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/detc2002/cie-34405.

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The traditional software process models are used in the development of design support software (DSS). They are typically multi phased, and consist of requirements specification, design, implementation, testing and operation as the main phases. One of the goals of phased development is to minimize faults in the delivered codes. Many of the faults can be traced back to the pre implementation phases of requirements specification and design. Reviews are typically performed to remove faults before the requirements or designs are passed to the subsequent phase. The problem is that activities in the phases of software process models, in particular the design phase are coarsely defined and do not scale to precisely match the underlying needs. We have developed a computer based pre-implementation testing methodology called abstract prototyping. It extends the current practices by defining the steps of the design phase of the DSS development process as definition of features, creation or selection of theories, formulation of methods, building of algorithms and implementation of pilot prototypes. Based on this methodology, faults can be traced back to the requirements, theories, methods, algorithms, or pilot prototypes rather than exclusively to the requirements or designs. Under this procedure, reviews are performed to remove faults before the requirements, theories, methods, algorithms, or pilot prototypes are passed to the subsequent stage or phase. Prototypes are used to provide the feel and the look of these work products and specially designed measures are used to estimate the extent to which they fulfill their respective specification requirements. We have applied our methodology to several application cases. The results show that the levels of fulfillment of requirements for theories, methods, algorithms, or pilot prototypes can effectively be estimated and in so doing faults detected sufficiently. In this paper, we first review the problem and present the related works. We then briefly introduce the abstract prototyping concept and present its application case studies.
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Michell, Frank, Marcela Politano, Jeffrey Stallings, and Yushi Wang. "Structural Modification of a Power Plant’s River Water Intake to Minimize Ice Blockage." In ASME 2013 Power Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/power2013-98281.

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Ice blockage of a power plant’s water intake is of paramount importance since it can lead to an unplanned shutdown of the intake compromising water supply and plant operation. American Electric Power’s (AEP) Conesville Power Plant historically controlled ice accumulation at the river intake by routing to the intake a portion of the warm water return from the condenser on the only operating “once-through” unit’s circulating water system. The unit operating with this once-through cooling system was retired at the end of 2012; thus, the plant lost the use of the condenser outlet/warm water return deicing flow at the river intake. A numerical study was conducted to evaluate design alternatives to alleviate ice accumulation at the river intake. A numerical model to predict the ice transport and accumulation at the river intake was developed and used to understand the main phenomenon leading to intake blockage. The effectiveness of mitigation measures was evaluated with the model. A mitigation plan consisting of intake modifications to be implemented during several phases is presented. In the first phase, large pipe openings are cut in the walls separating intake pump wells of previously retired units at the facility. In the second phase, a number of sediment control vanes previously placed in front of the intake are removed to facilitate downstream ice transport. A third phase, if needed to be implemented, involves removing additional sedimentation control vanes and cutting holes in the pump wells on the operating units. The paper describes the model, discusses numerical results and presents the field experience after implementation of phase one.
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Ananthi, S., R. Gowri Shankar Rao, and K. Padmanabhan. "Variable three phase induction motor drive scheme with minimal electronic hardware." In 2008 3rd IEEE Conference on Industrial Electronics and Applications (ICIEA). IEEE, 2008. http://dx.doi.org/10.1109/iciea.2008.4582906.

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Reports on the topic "Phase minimale"

1

Yu, Luping. Photorefractive Materials Exhibiting High Performances and Minimal Phase Separation. Defense Technical Information Center, 2002. http://dx.doi.org/10.21236/ada417654.

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2

Negri, M. C., P. Gillenwater, and M. Urgun Demirtas. Emerging technologies and approaches to minimize discharges into Lake Michigan Phase 2, Module 3 report. Office of Scientific and Technical Information (OSTI), 2011. http://dx.doi.org/10.2172/1013336.

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3

Negri, M. C., P. Gillenwater, M. Urgun-Demirtas, G. Nnanna, J. Yu, and I, Jannotta. Emerging technologies and approaches to minimize discharges into Lake Michigan, phase 2 module 4 report. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1039518.

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4

Burnett, LouAnn, and Ryan Ritterson. Supporting Risk-Based Decision-Making to Minimize Facility-Associated Re-Introduction of Poliovirus: Phase I. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1761108.

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5

Jones, Roger M. Dipole Wakefield Suppression In High Phase Advance Detuned Linear Accelerators for the JLC/NLC Designed to Minimise Electrical Breakdown and Cumulative BBU. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/784983.

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6

Alt, Jonathan, Willie Brown, George Gallarno, and John Richards. Risk-based prioritization of operational condition assessments : stakeholder analysis and literature review. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/40162.

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Abstract:
The US Army Corps of Engineers (USACE) operates, maintains, and manages more than $232 billion worth of the Nation’s water resource infrastructure. Using the Operational Condition Assessment (OCA) system, the USACE allocates limited resources to assess conditions and maintain assets in efforts to minimize risks associated with asset performance degradation. Currently, OCAs are conducted on each component within a facility every 5 years, regardless of the component’s risk contribution. The analysis of risks associated with Flood Risk Management (FRM) facilities, such as dams, includes considering how the facility contributes to its associated FRM watershed system, understanding the consequences of degradation in the facility’s performance, and calculating the likelihood that the facility will perform as expected given the current OCA condition ratings of critical components. This research will develop a scalable methodology to model the probability of failure of components and systems that contribute to the performance of facilities in their respective FRM systems combined with consequences derived from hydrological models of the watershed to develop facility risk scores. This interim report documents the results of the first phase of this effort, stakeholder analysis and literature review, to identify candidate approaches to determine the probability of failure of a facility.
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7

de Caritat, Patrice, Brent McInnes, and Stephen Rowins. Towards a heavy mineral map of the Australian continent: a feasibility study. Geoscience Australia, 2020. http://dx.doi.org/10.11636/record.2020.031.

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Abstract:
Heavy minerals (HMs) are minerals with a specific gravity greater than 2.9 g/cm3. They are commonly highly resistant to physical and chemical weathering, and therefore persist in sediments as lasting indicators of the (former) presence of the rocks they formed in. The presence/absence of certain HMs, their associations with other HMs, their concentration levels, and the geochemical patterns they form in maps or 3D models can be indicative of geological processes that contributed to their formation. Furthermore trace element and isotopic analyses of HMs have been used to vector to mineralisation or constrain timing of geological processes. The positive role of HMs in mineral exploration is well established in other countries, but comparatively little understood in Australia. Here we present the results of a pilot project that was designed to establish, test and assess a workflow to produce a HM map (or atlas of maps) and dataset for Australia. This would represent a critical step in the ability to detect anomalous HM patterns as it would establish the background HM characteristics (i.e., unrelated to mineralisation). Further the extremely rich dataset produced would be a valuable input into any future machine learning/big data-based prospectivity analysis. The pilot project consisted in selecting ten sites from the National Geochemical Survey of Australia (NGSA) and separating and analysing the HM contents from the 75-430 µm grain-size fraction of the top (0-10 cm depth) sediment samples. A workflow was established and tested based on the density separation of the HM-rich phase by combining a shake table and the use of dense liquids. The automated mineralogy quantification was performed on a TESCAN® Integrated Mineral Analyser (TIMA) that identified and mapped thousands of grains in a matter of minutes for each sample. The results indicated that: (1) the NGSA samples are appropriate for HM analysis; (2) over 40 HMs were effectively identified and quantified using TIMA automated quantitative mineralogy; (3) the resultant HMs’ mineralogy is consistent with the samples’ bulk geochemistry and regional geological setting; and (4) the HM makeup of the NGSA samples varied across the country, as shown by the mineral mounts and preliminary maps. Based on these observations, HM mapping of the continent using NGSA samples will likely result in coherent and interpretable geological patterns relating to bedrock lithology, metamorphic grade, degree of alteration and mineralisation. It could assist in geological investigations especially where outcrop is minimal, challenging to correctly attribute due to extensive weathering, or simply difficult to access. It is believed that a continental-scale HM atlas for Australia could assist in derisking mineral exploration and lead to investment, e.g., via tenement uptake, exploration, discovery and ultimately exploitation. As some HMs are hosts for technology critical elements such as rare earth elements, their systematic and internally consistent quantification and mapping could lead to resource discovery essential for a more sustainable, lower-carbon economy.
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