895 resultados para Galerkin weak form
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The evolution of boundedly rational rules for playing normal form games is studied within stationary environments ofstochastically changing games. Rules are viewed as algorithms prescribing strategies for the different normal formgames that arise. It is shown that many of the folk results of evolutionary game theory typically obtained witha fixed game and fixed strategies carry over to the present case. The results are also related to recent experimentson rules and games.
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I discuss the identifiability of a structural New Keynesian Phillips curve when it is embedded in a small scale dynamic stochastic general equilibrium model. Identification problems emerge because not all the structural parameters are recoverable from the semi-structural ones and because the objective functions I consider are poorly behaved. The solution and the moment mappings are responsible for the problems.
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A simple variant of trait group selection, employing predators as themechanism underlying group selection, supports contingent reproductivesuicide as altruism (i.e., behavior lowering personal fitness whileaugmenting that of another) without kin assortment. The contingentsuicidal type may either saturate the population or be polymorphicwith a type avoiding suicide, depending on parameters. In addition tocontingent suicide, this randomly assorting morph may also exhibitcontinuously expressed strong altruism (sensu Wilson 1979) usuallythought restricted to kin selection. The model will not, however,support a sterile worker caste as such, where sterility occurs beforelife history events associated with effective altruism; reproductivesuicide must remain fundamentally contingent (facultative sensu WestEberhard 1987; Myles 1988) under random assortment. The continuouslyexpressed strong altruism supported by the model may be reinterpretedas probability of arbitrarily committing reproductive suicide, withoutbenefit for another; such arbitrary suicide (a "load" on "adaptive"suicide) is viable only under a more restricted parameter spacerelative to the necessarily concomitant adaptive contingent suicide.
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The 20 amino acid residue peptides derived from RecA loop L2 have been shown to be the pairing domain of RecA. The peptides bind to ss- and dsDNA, unstack ssDNA, and pair the ssDNA to its homologous target in a duplex DNA. As shown by circular dichroism, upon binding to DNA the disordered peptides adopt a beta-structure conformation. Here we show that the conformational change of the peptide from random coil to beta-structure is important in binding ss- and dsDNA. The beta-structure in the DNA pairing peptides can be induced by many environmental conditions such as high pH, high concentration, and non-micellar sodium dodecyl sulfate (6 mM). This behavior indicates an intrinsic property of these peptides to form a beta-structure. A beta-structure model for the loop L2 of RecA protein when bound to DNA is thus proposed. The fact that aromatic residues at the central position 203 strongly modulate the peptide binding to DNA and subsequent biochemical activities can be accounted for by the direct effect of the aromatic amino acids on the peptide conformational change. The DNA-pairing domain of RecA visualized by electron microscopy self-assembles into a filamentous structure like RecA. The relevance of such a peptide filamentous structure to the structure of RecA when bound to DNA is discussed.
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PURPOSE: Despite ubiquitous expression of the keratoepithelin (KE) protein encoded by the transforming growth factor beta induced/beta induced gene human clone 3 (TGFBI/BIGH3) gene, corneal dystrophies are restricted to the cornea, and no other tissues are affected. We investigated the role of TGFBI/BIGH3 in Groenouw corneal dystrophies by generating transgenic mice overexpressing TGFBI/BIGH3 containing the R555W mutation. METHODS: Transgenic animals expressing the Groenouw mutation of human TGFBI/BIGH3 were generated using lentiviral vectors. The line expressed TGFBI/BIGH3 containing the R555W mutation under the control of the phosphoglycerate kinase (PGK) promoter. Expression of the transgene was monitored by Southern and western blotting and by RT-PCR. Electroretinogram analysis was performed and four mice were subjected to complete necroscopy. RESULTS: Transgene expression was observed in different organs although without specific expression in the cornea. The overall morphology of the transgenic animals was not severely affected by KE overexpression. However, we observed an age-dependent retinal degeneration both functionally and histologically. Female-specific follicular hyperplasia in the spleen and increased levels of lipofuscin in the adrenal gland were also seen in transgenic animals. CONCLUSIONS: Cellular degeneration in the retina of transgenic animals suggest that perturbation of the transforming growth factor beta (TGFbeta) family regulation may affect photoreceptor survival and may induce possible accelerated aging in several tissues. No corneal phenotype could be observed, probably due to the lack of transgene expression in this tissue.
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The three subtypes of the peroxisome proliferator-activated receptors (PPARalpha, beta/delta, and gamma) form heterodimers with the 9-cis-retinoic acid receptor (RXR) and bind to a common consensus response element, which consists of a direct repeat of two hexanucleotides spaced by one nucleotide (DR1). As a first step toward understanding the molecular mechanisms determining PPAR subtype specificity, we evaluated by electrophoretic mobility shift assays the binding properties of the three PPAR subtypes, in association with either RXRalpha or RXRgamma, on 16 natural PPAR response elements (PPREs). The main results are as follows. (i) PPARgamma in combination with either RXRalpha or RXRgamma binds more strongly than PPARalpha or PPARbeta to all natural PPREs tested. (ii) The binding of PPAR to strong elements is reinforced if the heterodimerization partner is RXRgamma. In contrast, weak elements favor RXRalpha as heterodimerization partner. (iii) The ordering of the 16 natural PPREs from strong to weak elements does not depend on the core DR1 sequence, which has a relatively uniform degree of conservation, but correlates with the number of identities of the 5'-flanking nucleotides with respect to a consensus element. This 5'-flanking sequence is essential for PPARalpha binding and thus contributes to subtype specificity. As a demonstration of this, the PPARgamma-specific element ARE6 PPRE is able to bind PPARalpha only if its 5'-flanking region is exchanged with that of the more promiscuous HMG PPRE.
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OBJECTIVE: To validate a revision of the Mini Nutritional Assessment short-form (MNA(R)-SF) against the full MNA, a standard tool for nutritional evaluation. METHODS: A literature search identified studies that used the MNA for nutritional screening in geriatric patients. The contacted authors submitted original datasets that were merged into a single database. Various combinations of the questions on the current MNA-SF were tested using this database through combination analysis and ROC based derivation of classification thresholds. RESULTS: Twenty-seven datasets (n=6257 participants) were initially processed from which twelve were used in the current analysis on a sample of 2032 study participants (mean age 82.3y) with complete information on all MNA items. The original MNA-SF was a combination of six questions from the full MNA. A revised MNA-SF included calf circumference (CC) substituted for BMI performed equally well. A revised three-category scoring classification for this revised MNA-SF, using BMI and/or CC, had good sensitivity compared to the full MNA. CONCLUSION: The newly revised MNA-SF is a valid nutritional screening tool applicable to geriatric health care professionals with the option of using CC when BMI cannot be calculated. This revised MNA-SF increases the applicability of this rapid screening tool in clinical practice through the inclusion of a "malnourished" category.
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Summarizes Iowa's 14 years of experience in pioneering and developing slip-form paving methods
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L'acte de fondation de ce prieuré (fol. 17) porte la date de 1170. — Ce ms. a appartenu à « l'abbé de Sencour, chanoine de Rouen. »
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Contient : Lettre d'Innocent XI ; « Observations sur l'Histoire du luthérianisme du P. Maimbourg » ; Extraits des Registres capitulaires de l'Église de Paris, 1654 ; Copies de pièces du XIIIe et du XIVe siècles relatives à différentes affaires ecclésiastiques ; Copie d'une lettre à Baluze sur un manuscrit chaldéen reçu du Levant par Colbert ; Sur la « Conférence de Cartage » ; Fragment orig . d'Ismaël Boulliau sur l'échéance du jour de Pâques ; « Observations sur un Traité de l'Usure fait par M. Poncet » ; « Oraison funèbre de M. de Candale par M. l'abbé Roquette, depuis évêque d'Autun » ; « Éclaircissement par M. Bernier sur le livre de Monsr de La Ville » pour la défense d'opinions de Descartes ; Mémoire pour la liberté de la Faculté de théologie de Paris ; Extraits impr. des Registres capitulaires de l'Église de Paris ; Sur la Visitation d'Angers ; Mémoires de procédure impr. relatifs à la Sainte-Chapelle ; Recueil de pièces mss et impr., bulles pontificales, lettres royales, etc., relatives à la Régale, 1198-1681 ; Établissement d'une Chambre royale à Metz, et extraits des Registres de cette Chambre royale, impr ; Lettre orig. de D. Godefroy, 1680 ; Pièces relatives à la principauté de Charleville ; Entrée de la reine de Suède Ulrique-Éléonore à Stockholm, 1680 ; Pièces impr. relatives à l'Hôpital général de Paris ; Ordonnances impr. du magistrat d'Amsterdam portant interdiction des carrosses dans ladite ville, en hollandais
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Contient : Pièces sur les Jésuites (f. 1), — sur les Frères Prêcheurs, impr. (f. 34), — sur la Sorbonne (f. 48) ; Pièces sur Descartes ; Extrait des Registres du Conseil d'État relatif à l'acquisition, pour la Bibliothèque du roi, d'une partie de la bibliothèque de Mazarin, 1668 ; « Epistola » R. Rapini, S. J., « ad... Cl. Pelterium », impr., 1684, in-8° ; Extraits de Registres du Parlement ; « Procédures faites... contre Antoine, comte de Shaftsbury », 1681 ; Sur la « Prévention » en Anjou ; Factums divers impr., affaire Bruant des Carrières ; Pièces relatives à la Compagnie des Indes orientales ; Factums impr., affaire Marcara Avachins ; Pièces relatives au commerce : « Avis sur le fait des ardoises », impr., 1683, in-4° ; Notes sur « Les édits et règlements des libraires, imprimeurs, relieurs et doreurs » ; Note sur le commerce des harengs
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Contient : Épitaphes des Cordeliers de Neufchâteau ; Épitaphes de Bayon ; Épitaphes de l'abbaye de Beaupré ; Épitaphes de Magnières ; Épitaphes des Cordeliers de Mirecourt ; Épitaphes des Carmes de Besançon ; Épitaphes des Cordeliers de Besançon ; Épitaphes de Bourbonne ; Épitaphes de l'abbaye de Morimond ; Épitaphes de Beaufrémont ; Épitaphes de Remennecourt ; Copie abrégée de l'épitomé de Jean Daucy ; Extrait du Trésor de l'évêché de Verdun
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This file contains the transformtion rules in SWRL to translate formal specifications of two lower ontology levels (patterns and organization) to the upper level (implementation according to the OKI specification).