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Статті в журналах з теми "Donnée L^1":
1
Ouerdiane, H. "Algebres nucleaires de fonctions entières et equations aux derivées partielles stochastiques." Nagoya Mathematical Journal 151 (June 1998): 107–27. http://dx.doi.org/10.1017/s0027763000025204.
Анотація:
En analyse du bruit blanc (W.N.A) on utilise usuellement le triplet de Gelfand (S(R) ⊂ L2(R, dt) ⊂ S′(R), μ) où S′(R) est l’espace de L. Schwartz des distributions tempérées et μ la mesure Gaussienne donnée par sa fonction caractéristique:(1)
2
Brulotte, Gaëtan. "Le corps dans l’œuvre de l’écrivain états-unien Paul Auster." University of Toronto Quarterly 91, no. 4 (November 1, 2022): 50–73. http://dx.doi.org/10.3138/utq.91.4.03.
Анотація:
Cet article cherche à cerner les représentations du corps dans l’œuvre de l’écrivain états-unien contemporain Paul Auster, à partir d’un échantillon de ses romans, et à voir ce que cette image du corps peut dire de la société dont l’auteur est issu. Les catégories d’analyse retenues sont celles que l’anthropologue français David Le Breton a élaborées dans ses ouvrages : 1) les techniques du corps qui sont le produit d’une somme d’apprentissages centrés sur des habiletés particulières, comme la marche, l’écriture, la sexualité, les sports, les arts et métiers ; 2) la gestuelle d’interaction qui concerne les mises en jeu du corps lors des rencontres avec les autres (comme dans l’échange verbal), lesquelles rencontres s’accompagnent de multiples signes corporels tels les mimiques, le rire, le regard, les gestes, les postures, la distance d’interaction, etc. ; 3) l’expression des émotions qui renvoie, dans une société donnée, aux façons d’exprimer l’ensemble des sentiments et des émotions, tels que la jalousie, la pudeur, la colère, car le corps soutient des messages émotionnels ; 4) la socialité infracorporelle qui englobe tout le domaine de la sensorialité ; 5) la socialité corporelle d’inconduite qui réfère à tous les gestes associés à l’« anormalité », comme ceux de la folie ou de la maladie.
3
Dupuis, M. J., and D. Girardot. "7. Présentation d'un portfolio électronique pour la formation et l'évaluation des compétences CanMEDS en obstétrique-gynécologie." Clinical & Investigative Medicine 30, no. 4 (August 1, 2007): 30. http://dx.doi.org/10.25011/cim.v30i4.2767.
Анотація:
Bien que les objectifs d’apprentissage et fiches d’évaluation de stage tiennent compte des sept compétences CanMEDS, il est difficile d’intégrer celles ci dans l’apprentissage et l’évaluation. Le portfolio, lorsque utilisé dans une approche réflexive, favorise l’apprentissage des compétences. Le développement et l’utilisation du portfolio visent une meilleure intégration des rôles CanMEDS dans l’apprentissage et une évaluation authentique des compétences.
Notre programme adopte le portfolio comme outil d’apprentissage et d’évaluation. Pour chaque compétence CanMEDS, le portfolio comprend 6 sections : 1) Critères spécifiques pour la compétence, 2) Description par le résident d’une bonne et d’une mauvaise performance, 3) Description d’un incident critique (un par année) ayant transformé sa formation, 4) Auto évaluation, 5) Rétroaction.
A chaque trimestre, le résident rencontre son tuteur et présente son auto évaluation. Celle-ci est comparée à l’évaluation que les superviseurs font du résident, compilée et présentée au résident par son tuteur. Annuellement, le résident fournit la preuve de sa progression pour une compétence donnée. Pour ce faire, il complète son portfolio régulièrement en cours d’année pour documenter l’analyse de sa progression à l’aide d’exemples tirés de son portfolio.
Après une année d’implantation, nous évaluerons l’impact sur la perception de l’intégration des compétences CanMEDS aux niveaux des apprentissages et des évaluations, et le degré de satisfaction des résidents et des tuteurs.
Naccache N, Samson L, Jouquan J. Le portfolio en éducation des sciences de la santé: un outil d’apprentissage, de développement professionnel et d’évaluation. Pédagogie médicale, 2006; 7: 110-27.
Tardif J. L’évaluation des compétences: documenter le parcours de développement, 2006
Kjaer NK, Maagaard R, Wied S. Using an online portfolio in postgraduate training. Medical Teacher, 2006; 8:708-712
4
Khdhiri, Hatem, Olivier Potier, and Jean-Pierre Leclerc. "Autoépuration en eau courante : évaluation de l’oxygénation dans les cascades en marches d’escalier." Revue des sciences de l’eau 27, no. 2 (June 13, 2014): 127–36. http://dx.doi.org/10.7202/1025563ar.
Анотація:
Dans les écosystèmes aquatiques, l’oxygène dissous est consommé par les processus chimiques et biologiques de l’autoépuration (oxydoréduction, dégradation de la matière organique,...) ainsi que par la respiration des espèces aquatiques. L’autoépuration sera donc favorisée par une amélioration de l’aération et le taux d’oxygène dissous constituera un indicateur de la qualité de l’eau. Les structures hydrauliques telles que les cascades jouent le rôle de système d’aération en favorisant l’absorption dans l'eau de l’oxygène atmosphérique. Afin d’évaluer le potentiel d’aération de ces ouvrages aux faibles débits, une étude a été réalisée sur une cascade de laboratoire représentative des petits cours d’eau et équipée de plusieurs marches modulables en nombre et en taille. Le transfert d’oxygène dans les cascades est fortement dépendant de l’aire de l’interface d’échange rapporté au volume d’eau, du type d’écoulement diphasique et de la turbulence dans le fluide. Du point de vue hydrodynamique, trois régimes d’écoulement ont été identifiés pour un débit inférieur à 3 L•-s-1, deux régimes de type nappe et un régime de transition. L’efficacité du transfert d’oxygène mesurée varie de 15 % à 40 % en fonction du débit d’eau, du nombre et de la longueur des marches de la cascade. Les résultats ont montré une amélioration de l’aération avec le débit (en régime nappe) et avec le nombre de marches. Sur les différents systèmes de cascades étudiés, une relation de linéarité entre le nombre de marches et l’efficacité d’aération a été constatée. L’ajout de graviers sur les marches provoque une légère amélioration de la capacité d’aération, dépendant du niveau d’immersion des graviers. À hauteur donnée, l’augmentation de la longueur des cascades défavorise le transfert d’oxygène.
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Downes, Noemí. "Conflicting Interests in Timeshare Contracts Revisited on the Occasion of the ECJ (First Chamber) Case C-73/04 Judgment 13 October 2005, Brigitte and Marcus Klein v. Rhodos Management." European Review of Private Law 15, Issue 1 (February 1, 2007): 157–68. http://dx.doi.org/10.54648/erpl2007005.
Анотація:
Abstract:On the occasion of the ECJ Decision on preliminary ruling on the interpretation of Article 16 (1) (a) of the Brussels Convention on Jurisdiction and Enforcement of Judgments, made in the course of proceeding brought for repayment of sums paid on the conclusion of a contract to acquire a right to use an apartment in Greece on a timeshare basis, the court entertained no doubts as to the obligational nature of the claim. This decision comes at a time when the European Commission is promoting follow-up consultations on the use of immovable property on a timeshare basis, pointing out that the lack of a unified concept as to what is the nature of the product has given way to a constant introduction of new contractual forms designed to evade the guarantees laid down by the Community. Against this background the author finds it appropriate to outline a personal approach to these issues. It is sustained that what lies in the centre of this and a vast number of similar disputes on the subject is insufficient recognition of the actual problems, for which, so far, there are still no satisfactory answers. Résumé:À l’ óccasion de la décision à titre préjudiciel de la CJCE en interprétation de l’article 16 (1) de la Convention de Bruxelles de 1968 concernant, la compétence judiciaire et l’exécution des décisions en matière civile et commerciale, soulevée dans une affaire pendante sur le remboursement des payments fait pour l’achat d?un droit d’utilisation à temps partiel (timeshare) d’un appartement en Grèce, la Cour n’a pas douté de statuer sur la nature obligationelle de cette question. Cette décision arrive au moment où la Commission lance une consultation sur l’utilisation à temps partiel des biens immobiliers parce que par défaut d’un concept uniforme de la nature du produit, des nouveaux contracts similaires au timesharing sont arrivés sur le marché pour exploiter des failles dans la réglementation communautaire. Sur la base de cette donnée, l’auteur fait ici une valoration personnelle de la question abordée. Cette opinion soutient que le motif de ces controverses et d’autres similaires se trouve dans une évaluation souvent erronée des vrais problèmes, auxquels in n’a pas été donné des réponses satisfaisantes. Zusammenffassung:Der vorliegende Beitrag bezieht seinen Anstoß aus einer jüngsten EuGH- Entscheidung sowie aus Aktivitäten der EG-Kommission im Bereich des Timesharing. Der EuGH hat in der hier besprochenen Entscheidung zu Artikel 16 (1) (a) EuGVÜ den vertraglichen Charakter der Ansprüche aus Timesharing-Verträgen betont. Das Verfahren betraf die Klage eines Käufers eines in Griechenland gelegenen Timesharingobjekts auf Rückzahlung der von ihm bei Vertragsschluss geleisteten Zahlungen. Die EG-Kommission initiiert zur Zeit Untersuchungen zu den Ausgestaltung von Timesharingverträgen in der europäischen Praxis, weil sie davon ausgeht, dass das Fehlen eines einheitlichen Timesharing-Begriffs in Europa den Gebrauch neuer Vertragsformen begünstigt hat, die europarechtliche Garantien umgehen könnten. Der vorliegende Beitrag will darlegen, dass der Ausgangspunkt für den der EuGHEntscheidung zugrunde liegenden Rechtsstreit und viele weitere im mangelnden Bewusstsein um die eigentlichen Probleme des Timesharing liegt, für die nach wie vor keine befriedigenden Lösungen gefunden wurden.
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Forster, Frédéric, Guillaume Dally, Virginie Liebermann, and Victoria Ruelle. "Regards croisés sur le délégué à la protection des données : une fonction clé pour l’entreprise." Pin Code N° 11, no. 2 (April 28, 2022): 1–14. http://dx.doi.org/10.3917/pinc.011.0001.
Анотація:
L’autorité de protection des données luxembourgeoise, la Commission Nationale pour la Protection des Données Personnelles (la « CNPD »), a rendu en 2021 une série de décisions concernant la fonction de délégué à la protection des données (le « DPO » 1 ). Ces décisions s’inscrivent dans le cadre d’une campagne diligentée par la CNPD au cours de l’automne 2018 durant laquelle l’autorité a initié des enquêtes dites « proactives », ayant pris la forme d’audits thématiques pour évaluer le niveau de conformité des organismes au RGPD. Si l’initiative de la CNPD sur la fonction du DPO n’a pas connu pour le moment d’équivalent chez nos voisins français et belge, il n’en demeure pas moins que chaque autorité de protection des données contrôle le respect du RGPD sur son territoire. L’Autorité belge de Protection des données (l’« APD ») a elle aussi déjà sanctionné des entreprises pour des manquements relatifs à l’exercice de la fonction du DPO. Ces décisions mettent en évidence la caractéristique essentielle de la fonction de DPO et sanctionnent des entreprises au niveau de l’indépendance du DPO dans l’entreprise. L’Autorité française, la Commission Nationale Informatique et Libertés (« CNIL »), a quant à elle récemment publié un guide pratique à l’attention des Délégués à la protection des données 2 dans lequel elle donne de nombreuses recommandations pratiques à mettre en œuvre. Il est donc intéressant de confronter au travers des trois contributions qui suivront les attentes et les critères des différentes autorités de protection des données sur la fonction du DPO en ce qui concerne sa désignation et ses compétences, sa fonction et l’exercice de ses missions sous l’angle luxembourgeois, belge et français.
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Porcu, L. "Valutazione della qualità dell’assistenza al diabete tipo 1 in Italia in base al genere. Le Monografie degli Annali AMD 2021." Journal of AMD 26, no. 1 (June 2023): 27. http://dx.doi.org/10.36171/jamd23.26.1.4.
Анотація:
OBIETTIVO Obiettivo dello studio è stato valuta[1]re gli indicatori di qualità dell’assistenza relativi al 2019, anno pre-pandemico, in ottica di genere nelle persone con DM1. DISEGNO E METODI Sono stati elaborati i dati dei pazienti con diabete di tipo 1 (DM1) visti nell’anno 2019, raccolti dai 282 servizi di diabetologia che hanno partecipato allo studio osservazionale re[1]trospettivo “Annali AMD”, ed estratti gli indicatori di processo, di esito intermedio, di appropriatezza, di esito finale, e di qualità di cura complessiva (score Q). RISULTATI Sono stati analizzati i dati di 37.445 pazienti affetti da DM1 (16.971 donne e 20.474 uomini) visitati nel corso del 2019 per consentire il confronto con le edizioni precedenti degli Annali AMD. Le donne hanno un’età più avanzata. Non ci sono differenze di genere nel monitoraggio degli indicatori di processo. I livelli medi di HbA1c sono 7,9% (63mmol/L) nelle donne e 7,7% (60mmol/L) negli uomini. La proporzione di soggetti con valori di HbA1c≤7% (53mmol/L) è maggiore tra gli uomini (31,7%) rispetto alle donne (25,6%). Il profilo lipidico non mostra sostanziali differenze di genere. I livelli medi di pressione arteriosa sono risultati più elevati negli uomini rispetto alle donne. Il 70.9% delle donne e il 63,8% degli uomini ha valori di pressione arteriosa sistolica ≤ 130mmHg e l’86,2% delle donne e l’81,1% degli uomini ha valori pressori diastolici ≤ 80mmHg. L’obesità di II e III grado è risultata più frequente nel sesso femminile (BMI: 35,0-39,9: donne:3,1% e uomini: 1,9%; BMI>40: donne: 0,9%, uomini: 0,4%). Il 12,2% delle donne e il 10,3% degli uomini presenta un eGFR <60 ml/m*1,73m2 . La micro/macroalbuminuria è presente nel 17,2% delle donne e nel 21,3% degli uomini. Le donne sono più trattate con microinfusore di insulina (CSII) (21,1% F vs 14,8% M). L’utilizzo degli ipolipemizzanti nelle donne è inferiore a quello dei maschi nel 2019 (F=34,4% , M=37,7%). Il 61% circa dei DM1 (M e F) ha uno Score Q > a 25, indicativo di una adeguata qualità di cura complessiva. CONCLUSIONI I dati degli annali AMD analizzati in base al genere per l’anno 2019 confermano il peggior controllo metabolico del DM1 nelle donne, il minor trattamento ipolipemizzante, la maggiore frequenza di eGFR ridotto, mentre negli uomini è peggiore il controllo della pressione arteriosa e maggiore la frequenza di microalbuminuria. Conoscere queste differenze, e capirne le cause è importante per i diabetologi per migliorare l’assistenza alle persone con DM1. PAROLE CHIAVE diabete T1; differenza di genere; Annali AMD; qualità di cura.
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Bentekhici, Nadjla, Yamina Benkesmia, Faouzi Berrichi, and Sid Ahmed Bellal. "Évaluation des risques de la pollution des eaux et vulnérabilité de la nappe alluviale à l’aide des données spatiales. Cas de la plaine de Sidi Bel Abbès (nord-ouest algérien)." Revue des sciences de l’eau 31, no. 1 (June 5, 2018): 43–59. http://dx.doi.org/10.7202/1047052ar.
Анотація:
En raison d’une forte croissance démographique et d’une évolution des modes de consommation, on se retrouve face à une augmentation rapide des volumes de déchets qui engendrent des risques pour la qualité des eaux dans la plaine de Sidi Bel Abbès. L’étude réalisée porte sur l’évaluation des risques de pollution ainsi que la cartographie de la vulnérabilité de la nappe alluviale à la pollution. Une première étape de l’étude consiste à utiliser des données spatiales du capteur algérien ALSAT-2A à haute résolution (2,5 m) pour l’identification et la cartographie des sources de pollution des eaux d’origines urbaines et industrielles. Ces données offrent la possibilité d’augmenter la rapidité et la précision de cette cartographie. Une deuxième étape vise la protection des ressources en eau contre les sources de pollution. Cette préservation est essentielle, particulièrement dans les zones semi-arides où l’eau souterraine constitue une importante source hydrique. La cartographie de la vulnérabilité de la nappe alluviale à la pollution est utile pour connaître les zones qui nécessitent une protection. La cartographie est faite en appliquant la méthode DRASTIC basée sur sept paramètres physiographiques et hydrogéologiques obtenus à partir des données de télédétection (MNT) et des données exogènes (lithologiques, pédologiques, pluviométriques, hydrogéologiques). La zone d’étude est la plaine de Sidi Bel Abbès (1 166 km2) au nord-ouest algérien. Il s'agit d'une cuvette à remplissage quaternaire. Le choix de la zone est lié à l’existence d’une unité hydrogéologique (nappe alluviale); c’est une zone à haute valeur agricole et où il y a une multiplication des sources de pollution des eaux. Les résultats obtenus traduisent le risque de pollution des ressources en eau (nappe alluviale, eaux du barrage de Chorfa et oued Mekerra) par des sources variées, urbaines et industrielles, notamment le centre d’enfouissement technique et les eaux usées industrielles. L’écoulement des eaux polluées vers le barrage de Chorfa dégrade la qualité de ces eaux. En décembre 2016, les eaux de ce barrage étaient très polluées et présentaient un résidu sec de 1 940 mg∙L-1, l’oxygène dissous de 66,5 %, le NH4 de 2 mg∙L-1, le nitrite de 0,22 mg∙L-1 et le phosphore de 0,51 mg∙L-1. Les eaux de l’oued Mekerra analysées en 2010 étaient de très mauvaise qualité : demande biochimique en oxygène (DBO5) de 41,296 t∙a-1, demande chimique en oxygène (DCO) de 123,465 t∙a-1, azote total de 3 193 t∙a-1 et phosphore total de 2 342 t∙a-1. Étant donné la connexion permanente entre l’oued et la nappe, on assiste à une détérioration de la qualité des eaux souterraines. Face à cette dégradation, une carte de la vulnérabilité a été réalisée afin de distinguer les zones de forte vulnérabilité en vue de prendre les dispositions de protection nécessaires. Ces zones représentent 34 % de la surface de la nappe alluviale.
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GOCKO, X. "L ART DE L EBM." EXERCER 34, no. 197 (November 1, 2023): 387. http://dx.doi.org/10.56746/exercer.2023.197.387.
Анотація:
Dans les années 1990, « l’art médical » a connu une rupture épistémologique avec l’arrivée du paradigme d’Evidence Based Medicine (EBM) défini comme « un usage consciencieux, explicite et judicieux des connaissances scientifiques disponibles pour décider des soins à donner à leurs patients »1. Comme toutes les ruptures, l’EBM a eu ses défenseurs et ses opposants. Les opposants, défenseurs de « l’art médical », craignaient une médecine normative avec des décisions certes fondées sur des preuves, mais négligeant la singularité des individus. Les partisans de l’EBM critiquaient des décisions fondées sur l’expérience clinique, négligeant la réactualisation des connaissances. À la fin des années 1990, dans les pays anglophones, une vague d’Evidence based decision a submergé de nombreux domaines d’intervention publique, éducation, justice, santé publique, etc. En France, Laurent et al. ont décrit en 2009 l’Evidence based policies (EBP), des politiques fondées sur des données probantes comme « ignorées ou occultées »2. Trente ans après cette rupture, comment se prennent les décisions ? Prenons l’exemple du Nirsevimab (Beyfortus) récemment commercialisé. Un médecin généraliste peut ignorer sa commercialisation et ne pas le prescrire, un autre peut le prescrire à la suite de la communication de Sanofi® « pierre blanche pour la santé des nourrissons … ». Le médecin EBM, quant à lui aura besoin de données avant de décider… L’article de Pouchain et al. fournit au médecin EBM les données dont il a besoin3. Il nous apprend que le Nirsevimab est efficace pour éviter une bronchiolite chez les nourrissons à haut risque de formes graves (NNT = 15 - à 5 mois). Il n’existe pas de différence de tolérance avec le placebo dans l’essai MEDLEY. Pour des raisons méthodologiques, l’efficacité sur le critère hospitalisation – même si elle paraît « très probable » – n’est pas formellement établie. Certains, au sourire ironique, vont dire que données ou pas, ils ne peuvent plus prescrire le Nirsemivab depuis sa suspension temporaire « en ville » le 29 septembre du fait « d’une adhésion au traitement supérieure à ce qui avait été anticipé en début d’année ». La même ironie peut amener à se demander si la décision initiale de commercialisation était une décision EBP, compte tenu du manque de données sur la réduction des passages aux urgences et des hospitalisations dans la large population ciblée par ce médicament. Certains vont poser la question de l’influence de l’industrie et donc des « corporate political activity based policies ». Ce ne serait pas la première fois que des conflits d’intérêts guident les décisions publiques, comme en atteste l’érosion de la Loi Évin par l’industrie de l’alcool4. À tous ceux qui se disent, « d’accord, mais en pratique ? », je propose d’estomper notre sourire ironique et de nous éloigner des problèmes de conflits d’intérêts. En pratique, l’article de Pouchain et al. rappelle l’importance de la décision partagée, avec la nécessité d’outils d’aide à la décision et de l’approche centrée patient avec des parents potentiellement anxieux, ou impressionnés face à une enfant sifflant et apathique. Finalement, exercer nous accompagne sur la voie de l’EBM, et c’est tout un art…
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Manus, Jean-Marie. "Bon usage des : l' donne le « la å." Revue Française des Laboratoires 2002, no. 344 (June 2002): 11. http://dx.doi.org/10.1016/s0338-9898(02)80005-1.
Дисертації з теми "Donnée L^1":
1
Camilotti, Silvia <1979>. "Una e plurima: riflessioni intorno alle nuove espressioni delle donne nella letteratura italiana." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1328/1/Camilotti_Silvia_Tesi.pdf.
Анотація:
Tale lavoro di ricerca ha indagato l’opera di sette scrittrici immigrate in Italia o nate da genitori immigrati che hanno composto in lingua italiana.
Esse sono: Christiana de Caldas Brito, Cristina Ubax Ali Farah, Gabriella Kuruvilla, Ingy Mubiayi, Ornela Vorpsi, Laila Wadia, Jarmila Očkayová.
La tesi consta di una premessa, un primo capitolo in cui sono riportate le interviste fatte alle scrittrici, un secondo capitolo di analisi dei loro testi, un terzo di riflessioni di teoria letteraria ed un quarto conclusivo. In appendice sono riportate integralmente le interviste.The thesis investigates the literary work of seven first and second generation migrant women who write in Italian language. They are: Christiana de Caldas Brito, Cristina Ubax Ali Farah, Gabriella Kuruvilla, Ingy Mubiayi, Ornela Vorpsi, Laila Wadia, Jarmila Očkayová. There are four chapters: a premise, the first chapter with the interviews to the authors, the second one with the analysis of their literary works, the third with a discussion on some theoretical literary issues, and the fourth with the conclusion. In the appendix I have reported the interviews in full.
2
Campigotto, Federica <1980>. "La rappresentazione della donna in alcune scrittrici haitiane contemporanee." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1604/1/revisione_marzo_2009.pdf.
3
Businaro, Chiara <1979>. "Donne tra natura e cultura: la riproduzione del ruolo materno nella pubblicità. Annunci italiani e spagnoli di prodotti per l'infanzia." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/3014/1/businaro_chiara_tesi.pdf.pdf.
4
Nguyen, Huy Hoang. "Equations de Navier-Stokes dans des domaines non bornés en dimension trois et problèmes elliptiques à données dans L/\1." Pau, 2008. http://www.theses.fr/2008PAUU3018.
Анотація:
Cette thèse a trait à l'utilisation des espaces de Sobolev avec poids dans des problèmes liés directement ou indirectement à la mécanique des fluides. La première partie, divisée en trois chapitres, concerne la régularité des solutions des équations stationnaires de Navier-Stokes pour des fluides visqueux incompressibles en domaine non borné autour d'un obstacle ou remplissant tout l'espace tridimensionnel. Cette partie a donné aussi quelques résultats concernant les équations d'Oseen, ainsi que la caractérisation des noyaux du laplacien avec des conditions de Dirichlet au bord dans un ouvert extérieur en dimension n et d'Oseen dans un ouvert extérieur en dimension trois. Dans la seconde partie, on s'intéresse à certaines propriétés des opérateurs gradient, divergence et rotationnel, puis on donne des applications à quelques problèmes elliptiques dans l'espace tout entier et dans le demi-espace avec des données dans L1In this thesis, we deal with the problems which are directly or indirectly related to fluid mechanics using weighted Sobolev spaces. The first part of this thesis contains three chapters which mainly concerns about the regularity of solutions of the stationary Navier-Stokes equations for incompressible viscous fluids in three-dimensional exterior domains or in the whole three-dimensional space with some additional results concerning the Oseen equations as well as the characterization of the kernel of the Laplace operator with Dirichlet boundary conditions in n-dimensional exterior domains and the characterization of the kernel of the Oseen system in threedimensional exterior domains. In the second part, we deal with certain properties of the gradient, divergence and rotational operators with applications to some elliptic problems in the whole space and in the half-space with L1-data
5
Cancellieri, Natalia <1978>. "Tra le righe del discorso autobiografico. La rappresentazione di sé della donna scrittrice nella Spagna contemporanea." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/1167/1/cancellieri_natalia_tesi.pdf.
6
Vettori, Giulia. "'Domum servavit'. La responsabilità economica delle donne romane tra guerre civili e Principato. Economia e diritto per una storia di genere." Doctoral thesis, University of Trento, 2018. http://eprints-phd.biblio.unitn.it/2977/1/Disclaimer_GiuliaVettori-2.pdf.
Анотація:
La ricchezza femminile rappresentava una componente di assoluto rilievo nella vita delle città dell'Impero, come rivela in modo macroscopico l'evidenza epigrafica, opportunamente valorizzata anche dagli orientamenti più recenti della ricerca. Ma cosa accade se si volge lo sguardo alla dimensione privata della gestione e della trasmissione del patrimonio? È possibile individuare, quantomeno de facto, una responsabilità nell'amministrazione delle ricchezze da parte delle donne? In quali termini queste ultime potevano concorrere alla prosperità finanziaria delle loro famiglie? Prendendo le mosse da una rilettura degli epitaffi dedicati alle 'matronae', spesso commemorate proprio attraverso espliciti riferimenti alle loro qualità di amministratrici domestiche, il lavoro si propone di indagare la rilevanza del contributo femminile all'economia di una 'domus' aristocratica nel periodo compreso tra le guerre civili e il primo Principato.
Nella prima parte della ricerca (Capitolo Primo), sottoposta a riconsiderazione critica l'attendibilità dell'idea che il principale apporto economico muliebre fosse limitato alla lavorazione della lana, viene analizzata la centralità del ruolo matronale nella supervisione della 'domus', che nel quadro delle economie preindustriali rappresentava molto più di una struttura abitativa o di uno spazio funzionale all'autorappresentazione del proprietario, fungendo piuttosto anche da vero e proprio centro di produzione, conservazione e organizzazione dell'intero patrimonio.
Nella seconda parte della tesi, il contributo della matrona all'economia della 'domus' viene valutato sotto il profilo più strettamente finanziario, concentrando l'attenzione rispettivamente sulla dote (Capitolo Secondo), sui beni ereditari (Capitolo Terzo) e sui negotia (Capitolo Quarto).
Tra la tarda Repubblica e il primo Impero, infatti, il patrimonio di una 'domus' aristocratica poteva contare su due diversi apporti, rigorosamente distinti e ugualmente significativi: da un lato quello del 'paterfamilias', dall'altro quello della 'materfamilias', non solo, dunque, moglie e madre, ma anche domina, titolare di diritti patrimoniali e di capacità di agire.
Il lavoro evidenzia che assumere la 'domus' quale 'focus' dell'indagine costituisce una prospettiva tutt'altro che limitativa: dall'esame delle fonti, in effetti, traspare come la soggettività patrimoniale femminile non esaurisse la propria rilevanza in un'ottica esclusivamente privatistica, assurgendo invece, negli equilibri socio-politici di un ordinamento censitario quale quello romano, a elemento di rilevanza strategica, non a caso sovente oggetto d'attenzione anche da parte del potere imperiale.
7
Escorihuela, Maria José. "Estimation de l'humidité du sol à partir de données radiométriques en bande-L : préparation de la mission SMOS." Phd thesis, Toulouse, INPT, 2006. http://oatao.univ-toulouse.fr/7541/1/escorihuela1.pdf.
Анотація:
Les travaux de cette thèse s'inscrivent dans le cadre de la préparation de la mission SMOS (Soil Moisture and Ocean Salinity). Sur les terres émergées, le satellite SMOS fournira une cartographie globale de l'humidité du sol à partir de données radiométriques en bande-L (1.4 GHz). Le principe physique repose sur la sensibilité de la bande- au contenu en eau de la surface. Le couvert végétal contribue à l'émission en fonction de son contenu en eau, et ses effets doivent être corrigés pour estimer l'humidité du sol. Le satellite SMOS obtiendra des mesures à deux polarisations (horizontale et verticale) et à multiples angles d'incidence. Ce système surdéfini permettera l'inversion de plusieurs paramètres, notamment l'humidité du sol et l'opacité de la végétation. L'objectif de cette thèse est de tester et d'améliorer si possible les modèles micro-ondes pour les scènes naturelles, en tenant compte les particularités de la configuration SMOS, notamment la diversité d'angles d'incidence. La première partie est consacrée à l'émission d'un sol nu. Dans un premier temps, deux approches (télédétection et capteurs in situ) pour estimer l'humidité du sol ont été comparées. Dans un deuxième temps, la signature angulaire et polarimétrique de l'émission d'un sol nu rugueux est étudiée, un modèle semi-empirique est développé pour prendre en compte des effets de la rugosité aux différents angles et polarisations. La seconde partie est consacrée à l'émission d'un couvert végétal. L'influence de la rosée et les variations journalières de teneur en eau de la végétation sur l'émission ont été analysées.
8
Aoun, Mirella. "Analyse et analyse numérique d'EDP issues de la thermomécanique des fluides." Electronic Thesis or Diss., Normandie, 2023. http://www.theses.fr/2023NORMR093.
Анотація:
Dans cette thèse nous nous intéressons à des systèmes non linéaires d'évolution issus d'un modèle de solidification non isotherme avec prise en compte de la convection. Ces systèmes consistent en un couplage non linéaire de trois équations aux dérivés partielles : la première est l'équation de la phase, la deuxième est l'équation de conservation de l'énergie et la troisième est l'équation de Navier-Stokes incompressible. Plus précisément, nous nous intéressons à établir des résultats sur l'existence de solutions pour ce type de systèmes en dimension 2 et 3 ainsi que sur la convergence de solutions approchées par la méthode des volumes finis. Une des particularités de ce type de système est la présence d'un terme naturellement dans L^1 dans l'équation de conservation de l'énergie, ce qui demande un traitement particulier.Cette thèse est divisée en deux parties.La première partie comporte deux chapitres et est consacrée à l'étude des problèmes avec données L^1 et des conditions aux limites de type Neumann. Pour traiter ces problèmes et ces données peu régulières, nous nous plaçons dans le cadre des solutions renormalisées.Nous établissons dans un premier chapitre un résultat de convergence des solution approchées par la méthode des volumes finis vers l'unique solution renormalisée à médiane nulle dans le cas d'une équation de convection-diffusion elliptique. Dans le second chapitre nous nous intéressons à un problème parabolique non-linéaire, avec des conditions de Neumann non homogène et un terme de convection. Pour ce problème nous donnons une définition de solution renormalisée et nous montrons l'existence et l'unicité d'une telle solution.La deuxième partie comporte deux chapitres et est consacrée à l'étude du système en dimension 2 et 3. Dans un premier chapitre nous traitons le cas de la dimension 2 et nous définissons une notion de solution faibles--renormalisées. Avec notamment l'aide des résultats d'existence et de stabilité établis dans la première partie pour l'équation de la conservation de l'énergie, nous démontrons un résultat d'existence de solution.Le dernier chapitre aborde le cas plus délicat de la dimension 3. L'absence de résultat général de stabilité et d'unicité pour l'équation de Navier-Stokes en dimension 3 nous impose tout d'abord à transformer le système en un système formellement équivalent. Par approximation et passage à la limite nous démontrons un résultat d'existence de solution dans un sens faibleIn this thesis, we focus on nonlinear evolutionary systems derived from a non-isothermal solidification problem with melt convection. These systems consist of three partial differential equations. The first is the phase-field equation coupled with the heat equation and the incompressible Navier-Stokes equation. More precisely, we are interested in the existence of solutions for these types of systems in the two-dimensional and the three-dimensional cases, and in the convergence of a finite volume approximation. One of the particularities of this type of system is the presence of a term naturally in L^1 in the energy conservation equation, which requires special treatment.This thesis is divided into two parts.The first part is divided into two chapters and is devoted to the study of problems with L^1 data and Neumann-type boundary conditions. To deal with these problems, and with data that are not very regular, we use the framework of renormalized solutions.In the first chapter, we establish a convergence result for solutions approximated by the finite volume method to the unique renormalized solution with zero median in the case of an elliptic convection-diffusion equation. In the second chapter, we focus on a non-linear parabolic problem with non-homogeneous Neumann conditions and a convection term. For this problem, we provide a definition of a renormalized solution and we show the existence and uniqueness of such a solution.The second part is devoted to the study of the system in dimensions 2 and 3. The first chapter deals with the dimension 2 and defines the notion of weak--renormalized solutions. With the help of the existence and stability results established in the first part for the conservation of energy equation, we prove the existence of a weak--renormalized solution.The final chapter considers the trickier case of dimension 3. The absence of a general stability and uniqueness result for the 3-dimensional Navier-Sokes equation requires us to transform the system into a formally equivalent one. By approximation and passage to the limit, we prove the existence of a solution in a weak sense
9
Latella, Cecilia. "“Giovane donna in mezzo ’l campo apparse”. Figure di donne guerriere nella tradizione letteraria occidentale." Tesi di dottorato, 2011. http://opar.unior.it/625/1/Abstract_tesi_Latella.pdf.
Анотація:
“Giovane donna in mezzo ’l campo apparse”. Warrior women in Western literary tradition
This thesis analyses the theme of warrior women from ancient times until the start of XVII century, mainly from a narrative and philological point of view.
Chapter I dwells on the narrowing of the Amazonian myth from describing an aberrant community, built in reverse to Greek society, to exploring single characters, as Penthesileia and Camilla, whose death can stir the audience’s emotional reaction.
Chapter II observes the modifications occurred to the theme in French medieval literature, as a consequence to the intervening Christianity and feudalism. Courtly culture drew authors to include warrior women as participants to the love relationships that are to be found in romans d’antiquité and chansons de geste. Following conversion and marriage to a Christian knight, the war activities of a woman may be intended positively, in support of the approved faction within the war.
Chapter III shows how textual motifs destined to a long success, such as the sex change, the male disguise, the fallen helmet and pre-nuptial duel, take roots in Italian popular chivalric poetry as it begins to develop independently from the French sources.
Chapters IV and V, covering the three main Italian romances (Pulci’s Morgante, Boiardo’s Orlando Innamorato and Ariosto’s Furioso), follow the raising status of warrior women as they are created ancestors to ruling dynasties. In the Furioso, Bradamante and Marfisa are employed as speakers for the querelle des femmes, intervening about the superiority of one sex on another and about the performance of gender roles in a public as well as in a private context.
The shift from romance to epic poetry causes a renewed display of warrior women’s death, as a mean to expel romantic deviations from the army-centred plot. In the Gerusalemme Liberata (discussed in chapter VI), the death of Clorinda becomes the crossing point between the undercurrent issues of the poem – incommunicability, lies, deceits – as she finds herself torn amidst unexpressed desires on one hand, and desires projected on other people that the self on the other.
The last three chapters survey the adaptations of Ariosto’s and Tasso’s schemes in France, England and Spain. The device of using warrior women as dynasties’ ancestors is exploited in both the Espagne Conquise, by Nicolas de Montreux (chapter VII) and The Faerie Queene by Spenser (chapter VIII). Here, lady knight Britomart is introduced into an allegorical setting where she embodies the virtue of active Chastity and Equity.
Chapter IX summarises the fortune of warrior women in Spanish libros de caballerías. Spanish authors are particularly interested in reminding their readers of the necessity for normative restoration, as it is evident in the deconstruction of Ismenia as a warrior queen in Lope de Vega’s Jerusalén Conquistada.
The study ends outlining the new trends present in stories about warrior women at the beginning of XVII century. A large bibliography concludes the volume.
10
GAILLARD, Rémi. "De l'Open data à l'Open research data : quelle(s) politique(s) pour les données de recherche ?" Thesis, 2014. http://eprints.rclis.org/22746/1/VD%20relue.pdf.
Анотація:
Open access movement is increasingly expanding from scientific publications to research data. Initiatives to make research data broadly accessible and fully available
for reuse are emerging from a variety of stakeholders at international and European scale – states, funding agencies, publishers and scientific communities themselves.
Research data openness is achieved through different policies, technical and legal mecanisms, but also lie on good data management practices. While France is beginning
to get into the Open research data movement, it is important to consider that data policies are also needed at university level. Librarians have a serious part to play in
leading on institutional data policy, understanding researchers needs and helping in metadata creation. Open access to research data is thus a unique opportunity for
librarians to redesign their connection with scientific communities inside research institutions.
Книги з теми "Donnée L^1":
1
Richard, Olivier, and Gabriel Zeilinger. La participation politique dans les villes du Rhin supérieur à la fin du Moyen Âge / Politische Partizipation in spätmittelalterlichen Städten am Oberrhein. Erich Schmidt Verlag GmbH & Co. KG, 2017. http://dx.doi.org/10.37307/b.978-3-503-17488-1.
Анотація:
Die aktuellen Debatten über die verschiedenen Möglichkeiten und die Grenzen politischer Partizipation der Bürger in den europäischen Staaten liegen diesem Buch zu Grunde, das eine historische Betrachtung beisteuern möchte. Stellten die Städte des Spätmittelalters, die als eine Wiege der politischen Moderne der westlichen Welt gelten, eher einen Raum des Zwangs oder des ausgehandelten Miteinanders dar? Politische Partizipation wird in all ihren Facetten untersucht: von der Entstehung städtischer Gemeinden über die Rolle der Zünfte oder der Schützengesellschaften bis hin zu Kontrollrechten der Stadtbürger etwa im Steuerwesen oder der Verweigerung der Eidesleistung gegenüber der Obrigkeit. Les débats actuels sur les différentes modalités et sur les limites de la participation politique des citoyens dans les États européens sont à l’origine de ce livre, qui entend donner un éclairage particulier sur ce champ. Les villes de la fin du Moyen Âge, considérées comme l’un des berceaux de la modernité politique occidentale, constituaient-elles un espace de contrainte ou d’un vivre-ensemble négocié ? Ce problème est abordé en étudiant la participation politique dans tous ses aspects, de la constitution d’une communauté urbaine au rôle des métiers ou des sociétés de tir et du droit de regard des bourgeois sur la fiscalité au refus de prêter serment aux autorités.
2
Gajewski, Zbigniew. Prognozowanie wystąpień faz fenologicznych pierwiosnki omączonej Primula farinosa L. (Primulaceae) – krytycznie zagrożonego gatunku - w odniesieniu do fenologii innych składników lokalnej flory i panujących warunków termicznych. Publishing House of the University of Agriculture in Krakow, 2018. http://dx.doi.org/10.15576/978-83-66602-32-8.
Анотація:
In Poland, the bird’s-eye primrose (P. farinosa) is a rare and critically endangered species. Currently, it occurs only in one location in the area of the Jaworki village in Radziejowa Range (of Beskid Sądecki mountains). This is the last of the nine previously existing locations, and the only one occurring in the mountains. To maintain the species, as well as the moutain fen on which it grows, a multiannual conservation program has been implemented, including, among other measures, conducting environmental monitoring and performing active protection procedures. In 2012–2014, studies were carried out, aiming to identify the phenology of P. farinosa in its natural location amid other elements of local flora, and to elaborate reasonably accurate forecast methods of its phenological phases, in relation to the performed procedures. One of the methods was based on comparing subsequent phenological phases of P. farinosa, mainly the dates of flowering and opening of the fruits, with the dates of flowering of other species that commonly occur in the vicinity. On the basis of temperature data from the IMGW meteorological station in Krościenko nad Dunajcem, available via the Internet, an attempt to forecast the phenophases of P. farinosa has also been made, based on the developed network of nearby meteorological stations. A degree-days method was used. Prior to that, a value of base temperature (Tb) characteristic for P. farinosa was assessed, as necessary for further calculations, and the values of SAT (Sum of Active Temperatures, using the formula for GDD values) have been determined for the dates of occurrence of subsequent phenological phases of P. farinosa. These parameters were calculated using temperature data recorded at the location. During the observations, it was established that the dates of flowering for P. farinosa were dependent on the air temperatures during spring. The flowering period of the population in Jaworki took place in the months of April through to June, and it did not exceed 7.5 weeks. P. farinosa is one of the earliest blooming species in that location. Other species, also flourishing during the blooming thereof, included Eriophorum angustifolium, Caltha laeta, Chrysosplenium alternifolium, Oxalis acetosella, and Primula elatior. The full bloom of P. farinosa lasted for about 2 weeks, and it took place between the end of April and the end of the second decade of May. During its full bloom, in that same location, Cardamine pratensis, Geum rivale, and Valeriana simplicifolia also flourished. Trees and bushes from the rose (Rosaceae) family proved to be especially useful in the forecasting of P. farinosa flowering period. During the flowering of P. farinosa, in lower locations, species from the Prunus and Cerasus genera subsequently flourished, followed by the Malus, Sorbus, and Crataegus genera. The opening of P. farinosa fruits was observed in the last days of June or at the beginning of July. The date of commencement and duration of this phase is probably subject also to the degree of air humidity. Although in this period numerous species flourish such as Ononis arvensis, Valeriana sambucifolia, Cichorium intybus, Melilotus alba, Achillea millefolium, Daucus carota, Geranium pratense, and Agrimonia eupatoria, the forecasts based on those are not accurate. When forecasting this phase, as well as the majority of other phases, the SAT value calculation based on the degree-days method works well. The Tb base temperature (threshold temperature) for P. farinosa from Jaworki, determined for its calculation, is 0.75°C. However, for the calculation purposes, the rounded value of Tb = 1.0°C can also be used. When adopting the value of Tb = 0.75°C for calculations, the full bloom of P. farinosa falls within the period in which the SAT values remain between 310°C and 469°C, the optimum (culmination) of the full bloom occurs at about 408°C, and the beginning of capsules opening and release of P. farinosa seeds occur when the SAT values reach 1049°C. For Tb = 1.0°C the full bloom falls within the period in which the SAT values are between 295°C and 449°C, the optimum of full bloom occurs at 390°C, and the capsules begin opening at 1018°C. When using this method, the differences between the forecasted and the observed dates of P. farinose blooming were between –4 and +3 days, and the beginning of opening of its fruits, between –1 and 0 days. In case of no temperature data available from the given location, the forecasting can be also performed based on the data from the IMGW meteorological station in Krościenko. The accuracy of calculations is increased through the implementation of appropriate temperature data adjustments, resulting from the difference of location and height. The temperatures in Jaworki are 2°C lower compared to the station in Krościenko. The dates determined in this way are less accurate than those determined directly at the location, and they differ from the actual dates: in case of full bloom, the difference is in the range of –6 to +2 days, and in case of the beginning of capsules’ opening, it is –2 to –1 days. Probably, it is also possible to implement forecasting based on the data from new automated meteorological stations situated closer to the location, but this can be done only after the adjustment appropriate for every station has been determined and implemented. As demonstrated, the elaborated forecasting methods of P. farinosa phenological phases at the location in Jaworki (Beskid Sądecki) are sufficiently accurate and they may be used in the future as a tool supporting the implementation of measures related to active protection of the species.
Частини книг з теми "Donnée L^1":
1
Ayadurai, Charmele, and Sina Joneidy. "Artificial Intelligence and Bank Soundness: A Done Deal? - Part 1." In Operations Management - Emerging Trend in the Digital Era. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95539.
Анотація:
Banks soundness plays a crucial role in determining economic prosperity. As such, banks are under intense scrutiny to make wise decisions that enhances bank stability. Artificial Intelligence (AI) plays a significant role in changing the way banks operate and service their customers. Banks are becoming more modern and relevant in people’s life as a result. The most significant contribution of AI is it provides a lifeline for bank’s survival. The chapter provides a taxonomy of bank soundness in the face of AI through the lens of CAMELS where C (Capital), A(Asset), M(Management), E(Earnings), L(Liquidity), S(Sensitivity). The taxonomy partitions opportunities from the main strand of CAMELS into distinct categories of 1 (C), 6(A), 17(M), 16 (E), 3(L), 6(S). It is highly evident that banks will soon extinct if they do not embed AI into their operations. As such, AI is a done deal for banks. Yet will AI contribute to bank soundness remains to be seen.
2
Greenlaw, Raymond, H. James Hoover, and Walter L. Ruzzo. "The Circuit Value Problem." In Limits to Parallel Computation. Oxford University Press, 1995. http://dx.doi.org/10.1093/oso/9780195085914.003.0010.
Анотація:
In this chapter we return to the Circuit Value Problem, introduced in Section 4.2. First, we will give the formal proof of Theorem 4.2.2 that CVP is P-complete, which we only sketched previously. Then we will show that a number of useful variants and restricted versions of CVP are also P-complete. Recall the definition of the Circuit Value Problem (Definition 4.2.1) in which given an encoding ᾱ of a Boolean circuit α, a designated output y , and values for the inputs x1,..., xn, we ask if output y of α is TRUE. To show CVP is P-complete under ≤mNC1 reducibility requires showing CVP is in P, and that each language L in P is ≤mNC1 reducible to CVP. It is easy to see that given the encoding ᾱ of a circuit and the values of its inputs, one can compute the value of each gate in a number of steps that is polynomial in the size of α. On a random access machine this can be done in linear time by considering the gates in topological order (which also can be computed in linear time; see Gormen, Leiserson, and Rivest [70], for example). On a deterministic Turing machine the process is a bit more clumsy but can still be done in polynomial time. Pippenger shows that even time O(nlogn) suffices, where n is the length of the encoding of α [284]. Thus, we have the following lemma. Lemma 6.1.1 The Circuit Value Problem is in P. The more difficult step in proving that CVP is P-complete under ≤mNC1 reducibility is showing there is a ≤mNC1 reduction from each language in P to CVP. Ladner proved this by simulating Turing machines with circuits. The idea is as follows. First, recall that for each language L in P, there is a 1-tape Turing machine M that on input x = x1,..., xn halts in time t(n) = nO(1) with output equal to 1 if and only if x is in L. Note that, for each n, the machine M uses at most t(n) space on its tape.
3
Kumar, Azad. "Photodegradation of Dyes in Visible Light by TiO2/PPy/GO Nanocomposites." In Innovative Nanocomposites for the Remediation and Decontamination of Wastewater, 29–52. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-4553-2.ch002.
Анотація:
In this research, a proficient method for the synthesis of TiO2/PPy and TiO2/PPy/GO nanocomposites is explored. These nanocomposites were prepared by one-step in situ deposition oxidative polymerization of pyrrole hydrochloride using Ammonium persulfate (APS) as an oxidant in the presence of TiO2 nanoparticles cooled in an ice bath. The obtained nanocomposites were characterized by XRD, TEM, SEM, UV-Vis, and FTIR techniques. The obtained results showed that TiO2 nanoparticles have been encapsulated by PPy with a strong effect on the morphology of TiO2/PPy and TiO2/PPy/GO nanocomposites. The photocatalytic degradation of rose Bengal, and Victoria blue dye was done under different conditions regarding concentration of dye, time of illumination, pH, and dose of the photocatalyst. The maximum photodegradation was found at 7 pH, 20 ppm concentration of VB and 25 ppm of RB dye solution, 800 mg/L for VB and 1600 mg/L for RB amount of photocatalyst, and 120 min irradiation of visible light. Kinetics of photodegradation were investigated for Victoria blue and rose Bengal dye and found first order kinetics.
4
S, Manjula Devi, V. Gayathri, A. P. Allen Princy, and R. Anitha. "GREEN SYNTHESIS OF SILVER NANOPARTICLES USING AQUEOUS EXTRACT OF LYCOPERSICON ESCULENTUM L. VAR. PKM 1." In Futuristic Trends in Agriculture Engineering & Food Sciences Volume 3 Book 1, 502–10. Iterative International Publisher, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bcagp1ch38.
Анотація:
Green synthesis is a low-cost and environmentally friendly method of producing silver nanoparticles on a big scale. Silver nanoparticles were created in this study using an aqueous leaf powder extract of Lycopersicon esculentum L. var PKM 1. Characterization of silver nanoparticles at optimum condition was done using SEM analysis. This showed the presence of silver nanoparticles at a higher range in tomato plants treated with mixture of organic fertilizer and biofertilizer rather than the control plant. EDAX analysis showed the presence of various elements at different concentration levels. The elements present in the control tomato plant were Carbon, Oxygen, Silver, Chlorine and Gold. Apart from these elements, the mixture of organic fertilizer and biofertilizer treatment showed the presence of Silicon at 2% level. The percentage of silver in tomato plants treated with mixture of organic and biofertilizers was found to be higher (9%) when compared to the control plant (4%). The percentage of Gold was equal (2%) in both control plants and plants treated with mixture of organic and biofertilizers. The presence of silver in the tomato plants treated with mixture of organic and biofertilizer shows that the plant could be used for the production of particles at nano scale that has a wide range of application in industry.
5
Darwesh, Rasmia. "In Vivo Date Palm." In Handbook of Research on Principles and Practices for Orchards Management, 203–26. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-2423-0.ch012.
Анотація:
Date palm (Phoenix dactylifera L.) plants demand reclamation of new areas or renewal of the oldest trees. Different methods to produce these plants as seeds that gave only 50% of seedlings will be female. The dates from seedling plants are often smaller and of poorer quality, so the propagation of date palm plantlets will occur with different methods. In vitro culture produced true-to-type huge numbers of plantlets under control conditions that led to many differences in morphology, physiology, and anatomy characteristics. The acclimatization was done to modify these abnormalities, and the plantlets after acclimatization need to improve growth by different treatments. Offshoots are the other method for propagation. These offshoots that grow from the base of the tree need to improve new rooting at the trunk base by growth regulators substances. This work shed light on the different methods of date palm propagation, the crucial role of the acclimatization greenhouse stage, and improved plantlets planted in the open field.
6
Cadena Hernández, José Fernando, and Diego Fernando Ruano Tovar. "Evaluación de la producción de 2,3 Butanodiol a partir de residuos de cáscara de naranja." In Sostenibilidad de procesos desde la economía circular en el contexto de la pospandemia covid-19, 45–59. Editorial UNIMAR, 2022. http://dx.doi.org/10.31948/editorialunimar.163.c5.
Анотація:
Esta investigación pretende simular el proceso de obtención de 2-3 Butanodiol a partir de residuos agroindustriales como es la cascara de naranja. Por lo anterior, fue necesario identificar la siguiente problemática: ¿Qué factibilidad técnica-económica tendrá producir un biocarburante 2-3 Butanodiol con un buen rendimiento a partir de cascara de naranja, que es generada por la agroindustria del departamento de Nariño? Por lo tanto, se tuvo en cuenta los valores registrados por el Ministerio de Minas y Energía en 2009, los cálculos se realizaron a partir de los resultados de proyección de cada uno de los compuestos mencionados. Así las cosas, durante 2009, se demandó 5.411 barriles día de Biodiesel y en 2025 se requerirá 8.400 barriles por día, es decir, un incremento del 55,1 %. Por otro lado, según lo obtenido en la simulación, cabe resaltar que el proceso para romper los enlaces de lignina requiere de pretratamientos que también puedan descomponer la hemicelulosa y celulosa. Teniendo en cuenta lo anterior, en la etapa de pretratamiento (explosión de vapor y filtrado), se logró eliminar el 90 % de lignina presente en la cáscara de naranja; sin embargo, según lo reportado por Vaquero (2016), el máximo rendimiento que se alcanza en un reactor de dos etapas continuas es de 0,46g*g-1, donde la concentración de este producto es de 67 g*l-1, por lo tanto, en este estudio se obtuvo un rendimiento de 6,15 % con relación a la cantidad de materia prima utilizada y producto obtenido; se ingresa al proceso 1.000 kg/h de cascara de naranja y se obtiene 61,5309 kg/h de producto (2,3 Butanodiol).
7
Xia, Wei. "Genes Involved in Lipid Metabolism in Coconut." In Innovation in the Food Sector Through the Valorization of Food and Agro-Food By-Products. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.90998.
Анотація:
Coconut palm (Cocos nucifera L) is an economically important monocot plant grown in tropical and subtropical regions. Coconut oil is stored in a solid endosperm and has 47.48–50.5% fatty acid component as lauric acid (C12:0). Present research showed that acyl-acyl carrier protein thioesterases (FatA/B) and lysophosphatidic acid acyltransferase (LAAPT) are key enzymes determining medium-chain fatty acid accumulation in coconut oil. Among five CnFatB genes, CnFatB3 expressed specifically in endosperm and in vitro experiment showed that this gene made mainly lauric acid (C12:0) and tetradecenoic acid (C14:1). Overexpression of CnFatB3 in Arabidopsis increased the amounts of C12:0 and C14:0 in transgenic plant. CnLPAAT gene that is expressed specifically in coconut endosperm showed a preference for using acyl-CoAs containing C10:0, C12:0, and C14:0 acyl groups as acyl-donor substrates. Coconut and oil palm are closely related species with approximately 50% lauric acid (C12:0) in their endosperm. The two species have a close evolutionary relationship between predominant gene isoforms and high conservation of gene expression bias in the lipid metabolism pathways. Moreover, since no stable transformation system has been constructed in coconut palm, gene function validations have been done in vitro, or genes transformed into a heterologous system.
8
Van den Berghe, Greet, Yoo-Mee Vanwijngaerden, and Dieter Mesotten. "Insulin therapy in the intensive care unit." In Oxford Textbook of Endocrinology and Diabetes, 1900–1905. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199235292.003.1489.
Анотація:
Critical illness triggers an acute stress response, of which the inflammatory reaction has always been in the forefront of clinical interest. Nevertheless, the changes in metabolism during acute critical illness have also been well characterized for a long time. Increased metabolic rate and release of large quantities of glucose, fatty acids, and amino acids from the body’s stores result in hyperglycaemia, hyperlipidaemia, and increased protein turnover. Until recently, these metabolic changes have been deemed adaptive or even beneficial, and metabolic intervention studies have been limited. Metabolism needs to redirect energy supply to vital organs, such as the brain and the blood cells, which rely mainly on glucose as their source of energy. The mobilization of amino acids for example supports healing of wounded tissues and synthesis of acute phase proteins in the liver. Although the acute metabolic changes may have beneficial connotations, it is also well established that a prolonged stress response triggers a sustained and irreversible catabolic state, with excessive breakdown of lean body mass, which may hamper recovery (1). Until recently, blood glucose control has not been a major focus for the intensive care physician. Only in patients with known diabetes mellitus were blood glucose levels more regularly measured, and even then without a widely accepted treatment policy. Nevertheless, patients without established diabetes mellitus develop hyperglycaemia too. The practice of ‘permissive hyperglycaemia’, tolerating blood glucose levels up to 12 mmol/l (215 mg/dl) in fed critically ill patients, was considered standard care. Blood glucose concentrations of 9–11 mmol/l (160–200 mg/dl) were recommended to maximize cellular glucose uptake while avoiding hyperosmolarity, osmotic diuresis, and fluid shifts. In addition, moderate hyperglycaemia was often viewed as a buffer against hypoglycaemia-induced brain damage. Consequently, intravenous insulin infusions, and certainly clear-cut blood glucose targets, were rarely used. Nevertheless, hyperglycaemia is clearly associated with adverse outcome. Large observational studies in critically ill patients and patients with a myocardial infarction reveal a J-shaped relationship between blood glucose level and the risk of mortality. In all those studies, the lowest risk of death is when admission or mean circulating glucose levels are between 5 and 8 mmol/l (90 and 140 mg/dl). Remarkably, in patients with established diabetes mellitus prior to intensive care admission, the relationship between hyperglycaemia and mortality is significantly blunted and shifted to the right (Fig. 13.4.10.4.1). As these associations are derived from observational studies, hyperglycaemia could still either reflect an adaptive, beneficial response (‘just a marker of severity of illness’), or could actively induce complications, as in diabetes mellitus, and hereby contribute to adverse outcomes (‘cause of disease’). In order to show a causal relationship between hyperglycaemia and mortality risk, randomized controlled trials that target and achieve different blood glucose levels had to be done.
9
Hai-Jew, Shalin. "The “Online Teaching, Design, and Development” Course." In Project Management Approaches for Online Learning Design, 137–73. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-2830-4.ch008.
Анотація:
“Online Teaching, Design and Development” was created as a 5-week instructor-facilitated online course to support the instructors at Kansas State University (K-State) in creating online courses and whole degree programs in the distance mode. This dual-track course accommodated both K-12 and university-level instructors, from on- and off-campus. This chapter describes how the course was conceptualized, structured, and deployed. This describes the curricular design and strategies; the creation of the various digital learning objects, the creation of the rubric evaluation structure, the assignment design, and the interactivity plan; and the course housekeeping management. Faculty members (learners) were recruited from both main and branch campuses at K-State and from other institutions of higher education using the Axio™ Learning/Course Management System (L/CMS), which was showcased in the curriculum. The lessons learned from the four years that this course has been offered (twice annually at minimum) include insights on the challenges of learner retention, the importance of learner incentives and record-keeping, and curriculum design and evolution. The curriculum was structured to have faculty build parts of an online course as they proceeded, so that all academic work done was also professional academic work towards building their online course(s). This chapter describes an online learning design structure that was sufficiently open to accommodate a variety of domain fields and teaching approaches and that encouraged peer support among faculty in the co-building of their respective courses.
10
Herz, Norman, and Ervan G. Garrison. "Radiation-Damage, Cosmogenic, and Atom-Counting Methods." In Geological Methods for Archaeology. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195090246.003.0010.
Анотація:
Fission-track dating, one of the more recent techniques involving the use of radioactivity, has developed one of the widest ranges of applications. Dates of objects have been obtained ranging from 6 months to 109 years BP. Volcanic tephra, obsidian, man-made and basaltic glass, meteorites, and mica have been dated. A more apt term is nuclear-track dating because fissionable elements do not have to be present in the material. Fission, which produces one form of nuclear track, is a rare mode of radioactive decay. A more common decay is alpha decay, which produces a different type of track. Uranium 238 fissions spontaneously and has a well-defined half-life. It also fissions in the presence of neutrons such as are produced by reactors, accelerators, or neutron "howitzers." About 99.27% of all uranium is uranium 238. Robert L. Fleischer, Paul B. Price, and Robert M. Walker, who have done most of the original work in this field, have determined that most minerals contain this isotope in amounts from a few parts per billion (ppb) to many parts per million (ppm). These researchers devised a chart which characterizes the ease of use of this technique as a function of the uranium concentration. A high uranium concentration allows an "easily measured" age where the observer spends an hour at the microscope counting chemically etched fission tracks. For "considerable labor," 40 hours of such work is assumed. Ancient synthetic glass typically contains 1-2 ppm of uranium, so most glasses older than 8,000 years are datable. Most pottery clay contains about 5 ppm of uranium in either the clay itself or other minerals that occur as inclusions. It is very probable that some pottery clays or the mineral inclusions, such as zircon, might contain higher concentrations than this, which would make the age measurement lie between "easily" and "with considerable labor." It is important to point out that mineral inclusions such as zircons or micas act as solid-state detectors in that they register fissions as a track on the surface in contact with the pottery clay. Both fission and alpha events can do this.
Тези доповідей конференцій з теми "Donnée L^1":
1
Mongia, Hukam C. "N+3 and N+4 Generation Aeropropulsion Engine Combustors: Part 1 — Large Engines’ Emissions." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94570.
Анотація:
A comprehensive assessment of emissions characteristics of the 1st, N and N+1 generation rich-dome combustion products has been done to identify the lowest emissions products. Focus of this paper is on the large rich-dome engines with its potential application for the (N+3) and (N+4) mixers with inspirational target takeoff NOxEI of 5 at 55 OPR. A total of ten engine models of the 1st generation were selected in addition to eight recently certified large engines. After evaluating several choices for conducting comparative assessment, the following three expressions were proposed for average takeoff NOxEI, idle COEI and HCEI entitlements, respectively: NOxEI L = 0.0288 × OPR 1.991 Idle COEI L = 815.36 Takeoff NOxEI L 1.159 Idle HCEI L = 0.15 × Idle COEI L - 2.0 In regard to application of the rich-dome technology to the (N+2) cycle based (N+3) mixers, the author tentatively gives it low probability of success barring success story stemming from Lee et al. [2012].
2
Kellner, Josef, Zdenek Kubin, Jan Hlous, and Lubos Prchlik. "Determination of Crack Initiation on Blade L-1 LP Steam Turbine Blades: Part 2—Computational Analyses." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-46206.
Анотація:
After ten years operation, one L-1 blade of steam turbine with large output power suddenly fell down. All 6 LP rotors (two machines) were checked and many cracks on L-1 blades were found. Due to economic reason, new blades were made with same geometry, but with better material in term of yield limit. Some L-1 stages were made from blades of original material, the rest was made from new material blades. Also the tip-timing measurement was installed on two L-1 stages to monitor blades. The investigation of blade cracks reason started. After one year of smooth operation there was an inspection. Surprisingly, the cracks were indicated again. The blades from new material had relatively more cracks than the original blades. This part describes some computational analyses which were done. For example, the modal analysis and forced vibration of mistuned bladed disk and of whole rotor train with attached L-1 blades, CFX and CFD calculations were done. The measurement of rotor torque, damping, Tip-Timing, experimental modal analysis of blades and rotor train and material test are presented in Part 1 – [7]. Application of both approaches (experimental and computational) rejected some hypotheses and revealed which hypotheses should be analyzed in a deeper way. The unstalled flutter has been identified as the most probable blade failures.
3
Jozelj, Miha, Tobja Košir, Darja Bozič, Matej Hočevar, Samo Penič, Aleš Iglič, Marko Jeran, and Veronika Kralj - Iglič. "Morphological Parameters of Erythrocyte Extracellular Vesicles at Hypoosmotic and Isoosmotic Conditions." In Socratic Lectures 7. University of Lubljana Press, 2022. http://dx.doi.org/10.55295/psl.2022.d16.
Анотація:
Extracellular vesicles (EVs) are membrane-enclosed structures of nanometer dimensions. They are formed by cells and can be found in isolates from body fluids. It is indicated that they play important role in intercellular communication in health and disease. In this work we observed the morpholoical parameters of EVs isolated by differential centrifugation from washed erythrocytes, in which vesiculation was accelerated by addition of detergent (sodium dodecyl sulfate). Aliquots of the isolate were suspended medium of two different osmolarities. Isolates were imaged with a scan-ning electron microscope (SEM) and the images were analyzed by using the contours of EVs from which the volume V, surface area S, and relative volume v = (36S3/V2)1/2 were assessed by a geomet-rical model. EVs were considered as spheres or spheroids. The isolates were rich in erythrocyte EVs so that representative sets (86 vesicles at osmolarity of 50 mOsmol/L and 109 vesicles at osmolarity of 300 mOsmol/L) could be outlined. The EVs at osmolarity of 50 mOsmol/L had shapes close to a sphere, while at osmolarity of 300 mOsmol/L they had elongated shapes. The shapes were approxi-mated by prolate spheroids. The average volume/surface area of EVs at osmolarity 50 mOsmol/L were 3.18×105 nm3/2.20×104 nm2, and at osmolarity 300 mOsmol/L they were 4.3×105 nm3/2.79×104 nm2. The respective differences in favor of the values at 300 mOsmol/L were statistically significant and of sufficient power. The relative volume of EVs at 50 mOsmol/L and 300 mOsmol/L were 1 and 0.96, respectively. While the difference in v suggests that, similarly to erythrocytes, water enters EVs in order to attain the Donnan equilibrium, the differences in V and A suggest that selective popping of (larger) EVs in the hypoosmolar sample took place. Keywords: Extracellular vesicles; Erythrocytes; Osmolarity; Differential centrifugation; Scanning electron microscopy (SEM); Morphology; Interdisciplinary connection; Medicine
4
VIŠKELIS, Jonas, Marina RUBINSKIENĖ, Dalia URBONAVIČIENĖ, Ramunė BOBINAITĖ,, and Pranas VIŠKELIS,. "OPTIMAL POSTHARVEST STORAGE PARAMETERS AND SHELF LIFE OF BABY SPINACH (SPINACIA OLERACEA L.)." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.024.
Анотація:
This work was done to evaluate the optimal postharvest storage parameters and shelf life of baby spinach. Baby spinach (50 g) was sealed in three different polypropylene (PP) and polyethylene (PE) packaging materials: 30 m (PP), 35 m (PE) & 40 m (PE), and were stored in darkness for 3 and 9 days at 0 °C, 4 °C, 8 °C & 16 °C ( 1 °C). Total content of phenolics, soluble solids, nitrates, chlorophyll content, ascorbic acid & spinach color (CIEL*a*b*) were measured by standard methods after 3 and 9 days of storage. Baby spinach stored at 0 1 °C and 4 1 °C showed the best visual quality. Storage temperature had significant influence on spinach colour, but the influence of packaging was not so strong. The content of soluble solids, ascorbic acid and nitrates decreased during storage. The highest amount of ascorbic acid was retained when baby spinach were stored in 40 m PE bags at 0 1 °C. When baby spinach was stored at higher temperatures (4 °C, 8 °C & 16 °C), the decrease in the amount of ascorbic acid ranged from 55 % to 69 %. Baby spinach stored for 9 days at 0 °C & 4 °C showed high visual and biochemical quality. Higher amounts of soluble solids and ascorbic acid were found in spinach stored in 40 m PE bags. Keywords: postharvest storage, spinach, Spinacia oleracea L.
5
Pathre, Sujay S., Ameya Mathkar, and Shyam Gopalakrishnan. "Design of Torispherical and Ellipsoidal Heads in Pressure Vessel and Review of Restrictions for the Onset of Buckling-Internal Pressure in ASME Sec.VIII Div.1: A Comparative Study of Various Codes of Construction." In ASME 2023 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/pvp2023-107243.
Анотація:
Abstract Pressure Vessels are made with various types of end closures. Commonly used end closures are torispherical dished ends, ellipsoidal dished ends, and hemispherical dished ends. For the design of these end closures the rules provided in ASME Sec. VIII Div. 1 [1] and ASME Sec. VIII Div. 2[2] differ significantly, and a similar phenomenon could be observed when a review is done against popular International Codes for pressure vessel design like PD 5500 [3], and EN 13445[4]. The difference in the design methodology is due to the design approach used in developing the equations in these Codes of Construction. ASME Sec. VIII Div.1 in Para. UG-32(c) and (d) for the design of all ellipsoidal heads and torispherical heads subject to internal pressure having ts/L ratio less than 0.002 directs the user to Para. 1-4 (f) of Mandatory Appendix 1 in code [1]. The requirements in Para. 1-4 (f) are added to prevent the possibility of buckling of the heads as the thickness is reduced as compared to the spherical radius. Buckling as a mode of failure is only envisaged when the ts/L ratio is less than 0.002 and no check on buckling is required when the ts/L ratio is greater or equal to 0.002. If we refer to other Codes like ASME Sec. VIII Div.2, PD 5500 and EN 13445, one can observe that the design of the dished head is based on plastic collapse and buckling failure approach and these Codes make it mandatory to check both the plastic collapse and buckling failure modes in all the circumstances. The work reported in this paper is an attempt to reviews the requirements of ASME Section VIII Division 1 for thin-walled dished heads with large internal diameter whose ratio of ts/L lie near the vicinity of 0.002 and comparative study of requirements imposed by ASME Section VIII Division 1 is compared with other International Codes. Also, FEA of the dished ends is carried out to study the stress pattern and to determine the stresses induced, buckling. Further comparison is made against various Codes’ classical formula requirements.
6
ŠIAUDINIS, Gintaras, and Danutė KARČAUSKIENĖ. "THE EFFECT OF SEWAGE SLUDGE ON AND CUP PLANT’S (SILPHIUM PERFOLIATUM L.) BIOMASS PRODUCTIVITY UNDER WESTERN LITHUANIA’S RETISOL." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.027.
Анотація:
The long-term field experiment with new high yielding perennial energy crop - cup plant (Silphium perfoliatum L.) was conducted in order to evaluate its biomass productivity in Vėžaičiai branch of the Lithuanian Research Centre for Agricultural and Forestry. Experimental site – naturally acid Bathygleic Dystric Glossic Retisol, pH 4.2-4.4. Granulated sewage sludge was applied (at 45 and 90 t ha-1 rates) as an alternative organic fertilizer. The fertilization was done at the beginning of the experiment, prior to cup plant’s sprouts planting in 2013. Each experimental year, traditional N60P60K60 fertilization was performed in a separate treatment. Cup plant’s biomass was harvesting once per season at the end of vegetation. Cup plant’s dry mass (DM) yield substantially increased from 2.80 t ha-1 (in 2014) to 13.41 t ha-1 (in 2016). The use of sewage sludge fertilization was notably superior to that of mineral fertilization for cup plant’s biomass productivity. In all experimental years, the optimal was the application of 45 t ha-1 rate of sewage sludge - in compare with unfertilized treatment (control), DM yield increased by 66 %, on average. Increasing of sewage sludge rate up to 90 kg ha-1 did not give any DM yield supplement. Energy evaluation of growing technology revealed that the application of 45 t ha-1 sewage sludge rate caused the substantial increase of energy output from 1 ha; and on the contrarily, sharply decreased net energy ratio. In order to determine the long-term effects of fertilization on biomass yield, these studies will continue a few more years.
7
Onyango, Stephen, Fredrick Okumu, Philemon Mung'au, Daniel Randa, Julius Oyie, and Lemmy Ouko. "Determination of L-Ascorbic Acid Quantities in Vegetables by Using 3% Acid-Alcohol in Iodine Redox Titrimetric Method." In 3rd International Nutrition and Dietetics Scientific Conference. KENYA NUTRITIONISTS AND DIETICIANS INSTITUTE, 2023. http://dx.doi.org/10.57039/jnd-conf-abt-2023-t.a.f.s-39.
Анотація:
The main objective of this study was to determine the suitability of using 3% acid-alcohol in iodine redox titrimetric determination of L-ascorbic quantities in chlorophyll-green vegetables. The main challenge in the protocol has been detection of titration end-point vegetables samples with high concentration of chlorophyll in the leaves. Chlorophyll doesn’t contrast with the blue-black color noticed at the end-point. This project therefore developed a modified iodine titration procedure that enhances the accuracy of end-point detection using an acid-alcohol. The analysis of vitamin C content was done by using iodine titration. In the titration, a 0.005molL-1 Iodine solution as a titrant, 0.5% starch as an indicator solution and vegetable samples containing the analyte L-ascorbic acid were used. The quantities of L-ascorbic acid content in different vegetables were determined using the novel titration method. For control experiments, vitamin C in orange fruits juice was determined. The visibility of the end points in orange fruit and vegetables were compared. The vegetables tested were Sukuma wiki, green pepper, spinach and cabbages. Three titration experiments were done to determine the average titer volumes of iodine solution used. The volume was used to determine the mass of ascorbic acid reacted in the samples of vegetables analyzed. The results were Orange 53.0gma/100g, collard greens 35.0gms/100g, green pepper 80gms/100g, spinach 27.5gms/100g and cabbage 36gms/100g of fresh weight. A two-sample t-test assuming equal variances used in the analysis of significant difference between the mean of masses of L-ascorbic acid in this study and the mean of masses in the previous study. Given α=0.05 and p =0.99, it was confirmed that there was no significant difference between the means. The results of the study were thus consistent with those of previous findings. A 3% acid-alcohol proves to be efficient in decolorization of chlorophyll to achieve a clear end–point during titration of vegetable samples. However, more studies should be done on other vegetables to validate the findings of this study Key words: L-ascorbic acid, 3% acid-alcohol, titration, vegetables
8
La Rosa, Renzo, Jaideep Pandit, Wing Ng, and Brett Barker. "Effects on Heat Transfer Coefficient and Adiabatic Effectiveness in Combined Backside and Film Cooling With Short-Hole Geometry." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91522.
Анотація:
Abstract Heat transfer experiments were done on a flat plate to study the effect of internal counter-flow backside cooling on adiabatic film cooling effectiveness and heat transfer coefficient. In addition, the effects of density ratio (DR), blowing ratio (BR), diagonal length over diameter (L/D) ratio, and Reynolds number were studied using this new configuration. The results are compared to a conventional plenum fed case. Data were collected up to X/D = 23 where X = 0 at the holes, an S/D = 1.65 and L/D = 1 and 2. Testing was done at low L/D ratios since short holes are normally found in double wall cooling applications in turbine components. A DR of 2 was used in order to simulate engine-like conditions and this was compared to a DR of 0.92 since relevant research is done at similar low DR. The BR range of 0.5 to 1.5 was chosen to simulate turbine conditions as well. In addition, previous research shows that peak effectiveness is found within this range. Infrared (IR) thermography was used to capture temperature contours on the surface of interest and the images were calibrated using a thermocouple and data analyzed through MATLAB software. A heated secondary fluid was used as ‘coolant’ in the present study. A steady state heat transfer model was used to perform the data reduction procedure. Results show that backside cooling configuration has a higher adiabatic film cooling effectiveness when compared to plenum fed configurations at the same conditions. In addition, the trend for effectiveness with varying BR is reversed when compared with traditional plenum fed cases. Yarn flow visualization tests show that flow exiting the holes in the backside cooling configuration is significantly different when compared to flow exiting the plenum fed holes. We hypothesize that backside cooling configuration has flow exiting the holes in various directions, including laterally, and behaving similar to slot film cooling, explaining the differences in trends. Increasing DR at constant BR shows an increase in adiabatic effectiveness and HTC in both backside cooling and plenum fed configurations due to the decreased momentum of the coolant, making film attachment to the surface more probable. The effects of L/D ratio in this study were negligible since both ratios used were small. This shows that the coolant flow is still underdeveloped at both L/D ratios. The study also showed that increasing turbulence through increasing Reynolds number decreased adiabatic effectiveness.
9
Galimutti, Peter P., Jerzy T. Sawicki, and David P. Fleming. "Analysis of Finger Seal Lift Pads." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59842.
Анотація:
Analyses were performed on finger seal pads having a pressure drop across the pad at right angles to the direction of runner velocity. The film was tapered; the clearance could decrease in both the pressure flow and velocity directions. A substantial load could be carried solely due to the pressure flow; however, the bearing exhibited negative stiffness without film convergence in the velocity flow direction. This is in marked contrast to a full circular bearing or ring seal, where pressure flow alone produces a significant stiffness as long as the clearance converges in the flow direction. The performance of three different pad configurations has been evaluated: aspect ratios L/B of 0.5, 1 (square pad), and 2. Design examples pertaining to each aspect ratio were studied for a gas turbine seal. Results show that lowest leakage, highest load carrying capacity, and highest stiffness are attained for the wide-pad configuration, L/B = 0.5. This paper presents a detailed study of the pad; additional analysis needs to be done for the inclusion of the finger and many other considerations for designing a complete seal.
10
Stingelin, Valentin. "The Stability of the Self-Lubricated Journal Slider Bearing." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20024.
Анотація:
Un-equivocal criteria could be established assuring a perfectly stable operation of the shaft in a restricted, but nevertheless technically interesting range of operational conditions. It enables bearing designers to choose all physical and operational parameters in order to avoid the so called “half speed whirl”. This study hopes to bring enough new elements to attenuate the ill merited reputation of such bearings. Therefore the relevant dimensionless numbers were identified and quantified. What was done for an L/D=1, can be applied to any other bearing configuration, provided the quasi-steady reaction forces, acting on the shaft, are known for the entire range of eccentricities 0<ε<0.9.
Звіти організацій з теми "Donnée L^1":
1
Amzeri, Achmad, Kaswan Badami, and Gita Pawana. Inheritance of resistance to downy mildew (Peronosclerospora maydis) in crossing of Madura Maize Plant (Zea mays L.). Innovative Scientific Information & Services Network, May 2019. http://dx.doi.org/10.21107/amzeri.2019.1.
Анотація:
Hybridization of Back cross is one method to get varieties that are resistant to downy mildew. The purpose of this study was to obtain information on inheritance characteristics of downy mildew resistance. This research was conducted at the experiment center of Agro-Technology Study Program of Agriculture Faculty, University of Trunojoyo Madura. Research of Assessment of resistance to Downy Mildew used a randomized block design with 18 treatments (P1, P2, F1, F2, BC1P1 and BC1P2 in three sets of crosses, namely LGL x Mdr-3, T12 x Mdr-1 and E02 x Mdr-2) and three replications so there were 54 experimental units. Identification of polymorphic RAPD markers for endurance to downy mildew through Bulk Segregant Analysis (BSA) was done by amplifying the DNA in the resistant pool and susceptible pool. The random primers used were 120 primers from 6 operon groups, namely OPA, OPB, OPC, OPD, OPF and OPG. The results showed that the inheritance pattern of maize genetic resistance to downy mildew followed a segregation pattern of 3:1 with a degree of dominance between -1 and 0, and was controlled by incomplete partially negative dominant gene. OPC-07 was a marker that was linkage close to the resistance to downy mildew with a genetic distance of 1.9 cM.
2
Pirone, Thomas P., Benjamin Raccah, and Nor Chejanovsky. Vector Specificity in Potyvirus Transmission: Role of the Helper Component. United States Department of Agriculture, January 2003. http://dx.doi.org/10.32747/2003.7586456.bard.
Анотація:
Objectives: The overall objective of this research was to gain a better understanding of how potyviruses interact with their aphid vectors. The aim was to design new approaches for prevention of potyvirus spread by aphids. The sub-objectives included: (1). Determination of which of the HCs of different potyviruses effect efficient transmission by specific aphid vectors; (2). Determine regions in the HC that play a role in their compatibility with the vector; (3). Determine the factors within the aphid stylets that modify HC activity in transmission. Background of the topic: Background to the topic: Potyviruses are typical non persistent viruses. They are retained within the vector’s stylets and rapidly lost by the vector. Some potyviruses greatly differ in their ability to be transmitted by different aphid species. The present work centered on analyzing factors that may modify the interactions between the "helper component"(HC), the virions and the aphid species involved. Major conclusions, solutions and achievements: It was established that specificity of transmission may depend on aphid species used. It was also shown that specificity may depend on the affinity between HC and virion. However, the attempts to create activechimericTEV/TuMVHCs or ZYMV/TuMVHCs to identify the regions that determine interaction with a specific vector(s), were not successful. More progress was attained in objective 3: In Kentucky, tests were conducted to ascertain retention tobacco vein mottling virus (TVMV) HC in the stylets of L. erysimicompared to that in M. persicae. Ultra-thin section of stylets of aphids that fed on either TuMVHC or TVMVHC antibodies were treated with gold-labeled goat anti-rabbit antibodies.TuMV was seen in 25% the stylets of L. erysimi when they acquired TuMVHC but not when they acquired TVMVHC. In M. persicae, TVMVHC was present in 30% of the stylets. . Transmission with TuMVHC was not affected by treatment with L. erysimi saliva whereas transmission with PVYHC (which also is not functional in L. erysimi) was consistently reduced by about half. Saliva from M. persicaehad essentially no effect on either HC. The possible role aphid cuticle proteins (which are found on the stylets surface) in the association with the potyviralHC was investigated in Israel. This was done adopting two approaches: (a) isolation of cuticular proteins from aphid cuticle; (b) screening for genes encoding cuticular proteins. In the first approach, we succeeded in extracting proteins from whole homogenized M. persicaeusing concentrated urea. The extracted protein served for preparation of anti cuticular antibodies. In overlay experiments it was found that cuticular proteins specifically bind to ZYMVHC. In addition, a cDNA library of M. persicae has been prepared. Genes encoding for cuticular proteins were ascertained using antibodies to cuticular proteins. This allowed reporting the sequence of the first cuticular gene of aphids and comparing it in six aphid species. Implications, scientific and agricultural: Achievements: (1) Proofs were provided for the role of the specificity of the aphid species to the HC of certain potyviruses; (2) aphid’s saliva was found to affects transmission efficiency; (3) cuticle protein genes were isolated for the first time from aphid species and an association of cuticle protein with the potyviralHC was discerned. Agricultural and/or economic impact of the research findings: At this stage of research, our finding do not bear an agricultural or economic impact.
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Ripoll, Santiago, Tabitha Hrynick, Ashley Ouvrier, Megan Schmidt-Sane, Federico Marco Federici, and Elizabeth Storer. 10 façons dont les gouvernements locaux en milieu urbain multiculturel peuvent appuyer l’égalité vaccinale en cas de pandémie. SSHAP, January 2023. http://dx.doi.org/10.19088/sshap.2023.001.
Анотація:
Si l’on s’en tient aux chiffres de la vaccination contre la COVID-19 dans les pays du G7, la campagne apparaît comme un véritable succès tant au niveau global qu’au niveau national. En effet, à ce jour, 79,4 % de la population totale des pays du G7 a reçu une première dose, 72,9 % une seconde, et 45,4 % une dose de rappel (données du 28 avril 2022) 1 En France, c’est 80,6 % de la population totale qui a reçu une première dose, 78,2 % qui a reçu deux doses, et 55,4 % qui a reçu un rappel (données du 28 avril 2022).2 Au Royaume-Uni, 79,3 % de la population totale a reçu une première dose, 74,1 % une seconde, et 58,5 % un rappel.1 Enfin, en Italie, 85,2 % de la population totale a reçu une première dose, 80,4 % a reçu deux doses et 66,5 % a reçu leurs rappels (données du 28 avril 2022). Ces taux de vaccination élevés masquent pourtant des disparités importantes à l’intérieur de chaque pays. Ainsi, à Marseille, deuxième ville de France, moins de 50 % des habitants des quartiers nord de la ville étaient vaccinés à la fin de l’année 2021, alors que plus de 70 % des habitants des quartiers sud l’étaient au même moment.3 Dans le quartier populaire de Ealing, situé au nord-ouest de Londres, 70 % de la population admissible avait reçu une première dose, soit près de 10 % de moins que la moyenne nationale. 4 (Données du 4 avril 2022). Des disparités similaires ont été observées dans d’autres métropoles urbaines des pays du G7. Ce document examine ces disparités au prisme de la notion d’« (in)égalité vaccinale ». En s’appuyant sur des recherches qualitatives menées pendant la campagne de vaccination de la COVID-19 dans les quartiers nord de Marseille, le quartier de Ealing à Londres (Nord-ouest) et dans la région de l'Émilie-Romagne et à Rome, en Italie, il montre comment les autorités locales peuvent agir pour atténuer ces inégalités. Mieux comprendre les inégalités en matière de vaccins fut primordial lors de la pandémie de la COVID-19 en ce sens que les populations sous-vaccinées étaient la plupart du temps des minorités ethniques ou culturelles, vivant dans des zones défavorisées, ou sans-papiers, donc plus susceptibles de contracter la COVID-19, et d’en subir les conséquences les plus dramatiques. 5 6 7 8 Ainsi, à Ealing, quatre mois après la campagne de vaccination, seulement 57,6% des personnes dans le décile de pauvreté le plus bas avaient reçu une dose, contre 81% des personnes dans le décile le plus aisé. 9 En outre, 89,2 % des résidents britanniques blancs de Ealing étaient vaccinés, contre 64 % des Pakistanais et 49,3 % des habitants issus des Caraïbes.9 À Rome, comme c’est le cas dans d’autres métropoles urbaines des pays du G7, nos données révèlent des disparités particulières importantes entre le recours aux vaccins des populations sans papiers et celui des citoyens établis. Les facteurs d’inégalité vaccinale dans ces environnements urbains sont complexes et liés à l’interaction de nombreux phénomènes tels que les inégalités économiques, le racisme structurel, l'inégalité d'accès aux soins de santé, la méfiance envers les professionnels de santé, les représentants de l'État, et plus encore. Les collectivités locales tout comme les professionnels de la santé, les groupes communautaires et les résidents jouent un rôle clé dans la manière dont s’exprime l’(in)égalité vaccinale. Pour autant, peu de leçons ont été systématiquement tirées des efforts menés en matière d’ «engagement vaccinal » au niveau local. Dans ce document, nous proposons d’expliquer comment l’expérience des inégalités structurelles se recoupe avec celle des habitants, et comment ces expériences ont été prises en compte ou au contraire ignorées dans la promotion et l’administration des vaccins contre la COVID-19 par les collectivités locales. Nous adressons également un ensemble de recommandations qui s’appliquent aux programmes de « vaccination de rattrapage » contre la COVID-19 (visant à atteindre les personnes qui n’ont pas encore reçu leur schéma vaccinal complet), mais elles concernent également les programmes de vaccination d'urgence à venir. Ce document repose sur des recherches menées entre octobre et décembre 2021 à Marseille et sur des échanges réguliers avec les autorités du Borough de Ealing initiés dès mai 2021. Il identifie comment les gouvernements locaux, les acteurs de la santé, les groupes communautaires et les résidents jouent un rôle clé dans la production d’(in)égalités vaccinales. Ce document a été élaboré pour la SSHAP par Santiago Ripoll (IDS), Tavitha Hrynick (IDS), Ashley Ouvrier (LaSSA), Megan Schmidt-Sane (IDS), Federico Federici (UCL) et Elizabeth Storer (LSE). Il a été revu par Eloisa Franchi (Université de Pavie) et Ellen Schwartz (Conseil de santé publique de Hackney). La recherche a été financée par la British Academy COVID-19 Recovery : Fonds G7 (COVG7210038). Les recherches ont été menées à l’Institut d’études du développement (IDS), à l’Université de Sussex et au Laboratoire des sciences sociales appliquées (LaSSA). La SSHAP en assume la responsabilité.