Academic literature on the topic 'Grandi dimore'
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Journal articles on the topic "Grandi dimore"
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Baskins, Cristelle L., and Julian Kliemann. "Gesta Dipinte: La Grande Decorazione nella Dimore Italiane dal Quattrocento al Seicento." Sixteenth Century Journal 26, no. 2 (1995): 394. http://dx.doi.org/10.2307/2542799.
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Mukhtar, M. Ropi, Marie-Thérése Martin, Michael Domansky, M. Pais, A. Hamid, A. Hadi, and K. Awang. "Phoebegrandines A and B, proaporphine-tryptamine dimers, from Phoebe grandis." Phytochemistry 45, no. 7 (August 1997): 1543–46. http://dx.doi.org/10.1016/s0031-9422(97)00189-1.
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MUKHTAR, M. R., M. T. MARTIN, M. DOMANSKY, M. PAIS, A. H. A. HADI, and K. AWANG. "ChemInform Abstract: Phoebegrandines A and B, Proaporphine-Tryptamine Dimers, from Phoebe grandis." ChemInform 28, no. 45 (August 3, 2010): no. http://dx.doi.org/10.1002/chin.199745245.
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Ferreira, L. S., L. N. Jorge, A. A. Caparica, D. A. Nascimento, Minos A. Neto, and J. R. Sousa. "Thermodynamic properties of rod-like chains: Entropic sampling simulations." Modern Physics Letters B 30, no. 31 (November 20, 2016): 1650378. http://dx.doi.org/10.1142/s0217984916503784.
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In this work, we apply entropic sampling simulations to a three-state model which has exact solutions in the microcanonical and grand-canonical ensembles. We consider N chains placed on an unidimensional lattice, such that each site may assume one of the three states: empty (state 1), with a single molecule energetically null (state 2), and with a single molecule with energy [Formula: see text] (state 3). Each molecule, which we will treat here as dimers, consists of two monomers connected one to each other by a rod. The thermodynamic properties such as internal energy, densities of dimers and specific heat were obtained as functions of temperature, where the analytic results in the microcanonical and grand-canonical ensembles were successfully confirmed by the entropic sampling simulations.
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Gill, Meredith J. "Julian Kliemann. Gesta Dipinte La grande decorazione nelle dimore italiane dal Quattrocento al Seicento. Milan: Silvana Editoriale, 1993. 256 pls. + 240 pp. $75." Renaissance Quarterly 49, no. 1 (1996): 184–86. http://dx.doi.org/10.2307/2863313.
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Saryal, Sushant, and Deepak Dhar. "Exact results for interacting hard rigid rotors on a d-dimensional lattice." Journal of Statistical Mechanics: Theory and Experiment 2022, no. 4 (April 1, 2022): 043204. http://dx.doi.org/10.1088/1742-5468/ac6038.
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Abstract We study the entropy of a set of identical hard objects, of general shape, with each object pivoted on the vertices of a d-dimensional regular lattice of lattice spacing a, but can have arbitrary orientations. When the pivoting point is situated asymmetrically on the object, we show that there is a range of lattice spacings a, where in any orientation, a particle can overlap with at most one of its neighbors. In this range, the entropy of the system of particles can be expressed exactly in terms of the grand partition function of coverings of the base lattice by dimers at a finite negative activity. The exact entropy in this range is fully determined by the second virial coefficient. Calculation of the partition function is also shown to be reducible to that of the same model with discretized orientations. We determine the exact functional form of the probability distribution function of orientations at a site. This depends on the density of dimers for the given activity in the dimer problem, which we determine by summing the corresponding Mayer series numerically. These results are verified by numerical simulations.
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Maly, P., P. Sundgren, L. Bååth, and P. Walday. "Neural Tolerance of the Non-Ionic Dimers Iodixanol and Iotrolan and the Non-Ionic Monomer Iopamidol during Myelography in Non-Anaesthetised Rabbits." Acta Radiologica 36, no. 4-6 (July 1995): 644–48. http://dx.doi.org/10.1177/028418519503600467.
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Purpose: The neural tolerance of the recently introduced dimer iodixanol (320 g I/l) was compared with that of the dimer iotrolan (300 g I/l) and of the monomer iopamidol (300 g I/l), both used in clinical myelography. Material and Methods: Non-anaesthetised rabbits were injected into the cisterna magna with Ringer's solution (control) or contrast media (CM) at doses of 1.0 or 0.5 ml/kg b.w. The behaviour of the animals (10 in each of 7 groups) was evaluated for signs of excitation and depression during the first 3 hours after injection. Results: At the dose level of 1.0 ml/kg b.w., iodixanol produced no seizures but did cause focal twitching in 4/10 rabbits. Iopamidol produced grand mal seizures in 2/10 and hyperexcitability in 4/10 rabbits. Iotrolan produced generalised grand mal seizures in 8/10 rabbits, an incidence of excitation significantly greater than that of iodixanol (p<0.01) and iopamidol (p<0.05). The excitative effects of iodixanol were not significantly different from those of iopamidol and Ringer's solution. All 3 CM produced similar depressive effects on rabbit behaviour. Ringer's solution caused no depressive effects (p<0.01). A clear dose response was produced with all 3 CM after treatment with a lower dose of 0.5 ml/kg b.w. Conclusion: The results indicate that the neural tolerance in the rabbit of iodixanol is higher than that of iotrolan, and is at least equal to that of iopamidol.
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Schwendtner, Karolina, and Uwe Kolitsch. "Three new acid M + arsenates and phosphates with multiply protonated As/PO4 groups." Acta Crystallographica Section C Structural Chemistry 75, no. 8 (July 25, 2019): 1134–41. http://dx.doi.org/10.1107/s2053229619008489.
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The crystal structures of caesium dihydrogen arsenate(V) bis[trihydrogen arsenate(V)], Cs(H2AsO4)(H3AsO4)2, ammonium dihydrogen arsenate(V) trihydrogen arsenate(V), NH4(H2AsO4)(H3AsO4), and dilithium bis(dihydrogen phosphate), Li2(H2PO4)2, were solved from single-crystal X-ray diffraction data. NH4(H2AsO4)(H3AsO4), which was hydrothermally synthesized (T = 493 K), is homeotypic with Rb(H2AsO4)(H3AsO4), while Cs(H2AsO4)(H3AsO4)2 crystallizes in a novel structure type and Li2(H2PO4)2 represents a new polymorph of this composition. The Cs and Li compounds grew at room temperature from highly acidic aqueous solutions. Li2(H2PO4)2 forms a three-dimensional (3D) framework of PO4 tetrahedra sharing corners with Li2O6 dimers built of edge-sharing LiO4 groups, which is reinforced by hydrogen bonds. The two arsenate compounds are characterized by a 3D network of AsO4 groups that are connected solely via multiple strong hydrogen bonds. A statistical evaluation of the As—O bond lengths in singly, doubly and triply protonated AsO4 groups gave average values of 1.70 (2) Å for 199 As—OH bonds, 1.728 (19) Å for As—OH bonds in HAsO4 groups, 1.714 (12) Å for As—OH bonds in H2AsO4 groups and 1.694 (16) Å for As—OH bonds in H3AsO4 groups, and a grand mean value of 1.667 (18) Å for As—O bonds to nonprotonated O atoms.
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Gomez Melo, Santiago, Dennis Wörthmüller, Pierre Gönczy, Niccolo Banterle, and Ulrich Sebastian Schwarz. "Grand canonical Brownian dynamics simulations of adsorption and self-assembly of SAS-6 rings on a surface." Journal of Chemical Physics, February 6, 2023. http://dx.doi.org/10.1063/5.0135349.
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The protein SAS-6 forms dimers, which then self-assemble into rings that are critical for the nine-fold symmetry of the centriole organelle. It has recently been shown experimentally that the self-assembly of SAS-6 rings is strongly facilitated on a surface, shifting the reaction equilibrium by four orders of magnitude compared to the bulk. Moreover, a fraction of non-canonical symmetries (i.e., different from nine) was observed. In order to understand which aspects of the system are relevant to ensure efficient self-assembly and selection of the nine-fold symmetry, we have performed Brownian dynamics computer simulation with patchy particles and then compared our results with experimental ones. Adsorption onto the surface was simulated by a Grand Canonical Monte Carlo procedure and Random Sequential Adsorption kinetics. Furthermore, self-assembly was described by Langevin equations with hydrodynamic mobility matrices. We find that as long as the interaction energies are weak, the assembly kinetics can be described well by the coagulation-fragmentation equations in the reaction-limited approximation. By contrast, larger interaction energies lead to kinetic trapping and diffusion-limited assembly. We find that selection of nine-fold symmetry requires a small value for the angular interaction range. These predictions are confirmed by the experimentally observed reaction constant and angle fluctuations. Overall, our simulations suggest that the SAS-6 system works at the crossover between a relatively weak binding energy that avoids kinetic trapping and a small angular range that favors the nine-fold symmetry.
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Rencoret, Jorge, Gisela Marques, Ana Gutiérrez, David Ibarra, Jiebing Li, Göran Gellerstedt, J. Ignacio Santos, Jesús Jiménez-Barbero, Ángel T. Martínez, and José C. del Río. "Structural characterization of milled wood lignins from different eucalypt species." Holzforschung 62, no. 5 (September 1, 2008). http://dx.doi.org/10.1515/hf.2008.096.
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Abstract The chemical structure of milled-wood lignins from Eucalyptus globulus, E. nitens, E. maidenii, E. grandis, and E. dunnii was investigated. The lignins were characterized by analytical pyrolysis, thioacidolysis, and 2D-NMR that confirmed the predominance of syringyl over guaiacyl units and only showed traces of p-hydroxyphenyl units. E. globulus lignin had the highest syringyl content. The heteronuclear single quantum correlation (HSQC) NMR spectra yielded information about relative abundances of inter-unit linkages in the whole polymer. All the lignins showed a predominance of β-O-4′ ether linkages (66–72% of total side-chains), followed by β-β′ resinol-type linkages (16–19%) and lower amounts of β-5′ phenylcoumaran-type (3–7%) and β-1′ spirodienone-type linkages (1–4%). The analysis of desulfurated thioacidolysis dimers provided additional information on the relative abundances of the various carbon-carbon and diaryl ether bonds, and the type of units (syringyl or guaiacyl) involved in each of the above linkage types. Interestingly, 93–94% of the total β-β′ dimers included two syringyl units indicating that most of the β-β′ substructures identified in the HSQC spectra were of the syringaresinol type. Moreover, three isomers of a major trimeric compound were found which were tentatively identified as arising from a β-β′ syringaresinol substructure attached to a guaiacyl unit through a 4-O-5′ linkage.
Dissertations / Theses on the topic "Grandi dimore"
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Cotugno, Carmelinda. "Grandi dimore e territorio nell'Irlanda del XVIII e XIX secolo." Doctoral thesis, Università di Catania, 2013. http://hdl.handle.net/10761/1407.
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Oggetto dello studio è la grande dimora irlandese del XVIII e XIX secolo, la quale simbolo della forza economica e sociale della classe terriera, ha avuto fin dalla sua origine uno stretto legame con il paesaggio in cui è stata inserita.
Da queste premesse si è voluto indagare il rapporto di interdipendenza tra la dimora storica e il territorio produttivo dell Irlanda agli albori del XVIII secolo, quando l isola sembra uscire da un lungo letargo dando segni di risveglio. Si è concordi, generalmente, nel considerare alla base di tale risveglio la fine delle guerre che avevano travagliato il secolo precedente, la crescita della popolazione e dei centri abitati. L antica base strutturale dell insediamento si viene a modificare, come soggiogata dai fermenti della classe terriera vitale e dinamica. Quella che irrompe tra il 1720 ed il 1745, facendosi strada faticosamente e vorticosamente fino alla metà del 1800, è una trama territoriale articolata, densa e complessa.
Fulcro dell intero lavoro è la dimora, unica prova architettonica dell epoca d oro della classe terriera, che diviene la chiave di volta per comprendere la vitalità di quest anima moderna dell Irlanda. Nel momento del massimo fulgore edificatorio, sociale e territoriale, le classi dirigenti contribuirono con nuove idee e nuovi progetti a dare un impulso notevole all economia della zona e del territorio circostante. Dopo una lunga parabola, durante la quale costituì il cuore pulsante della società, la classe terriera lasciò un eredità di straordinaria ricchezza e tracce indelebili, frutto di una condotta di vita eccezionalmente originale, soprattutto nel campo edificatorio con le testimonianze di numerose costruzioni dalla singolare capacità artistica ed architettonica.
La dimora, dunque, diversamente presa in esame, in senso geografico come in quello storico ed artistico, diviene il punto di partenza, di sintesi e di arrivo della rappresentazione del territorio irlandese del XVIII e XIX secolo.
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LEGE', ALICE SILVIA. "LES CAHEN D'ANVERS EN FRANCE ET EN ITALIE. DEMEURES ET CHOIX CULTURELS D'UNE LIGNÉE D'ENTREPRENEURS (I CAHEN D'ANVERS IN FRANCIA E IN ITALIA. DIMORE E SCELTE CULTURALI DI UNA DINASTIA DI IMPRENDITORI)." Doctoral thesis, Università degli Studi di Milano, 2020. http://hdl.handle.net/2434/726976.
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Founding member of a banking network related to the actual BNP Paribas Group, Meyer Joseph Cahen (1804-1881), adopted the “d’Anvers” when he settled in Paris in 1849. Born in Bonn, of an Ashkenazi family, he made his fortune in the Belgian city to which he associated his name, and he continued his career in France. Owner of Nainville’s castle (Essonne) and of the Petit Hôtel de Villars (Paris), he became a naturalized French citizen in 1865. The next year, he obtained the title of Count, bestowed upon him by the King of Italy Victor-Emmanuel II, thanks to the economic support he offered to the Italian Unification. Nineteen years later, King Humbert I surpassed his predecessor and raised Meyer Joseph’s eldest son, Édouard (1832-1894), to the status of Marquis of Torre Alfina. If his siblings – Emma (1833-1901), Louis (1837-1922), Raphaël (1841-1900) and Albert (1846-1903) – enrooted their pathways in the French capital, the eldest lived between Florence, Naples and Rome: he was one of the great investors involved in the urban renovation of the Italian capital, after the fall of the papacy. In France, as well as in Italy, art, and especially architecture, served to legitimize the recent nobility of a family that wished to express the fullness of its civil rights. As targets of the anti-Semitic press, the Cahen d’Anvers family experienced the consequences of the Dreyfus Affair and the horrors of the racial laws. Before the latter, they adopted what could be defined as a “top-down model of integration”. This thesis focuses on its mechanisms and development. After tracing the patriarch’s origins, it analyses the family’s matrimonial policies and it continues with an exploration of Cahen d’Anvers’ “choices” in the vast field of culture. In their salons, the readers will meet Guy de Maupassant, Paul Bourget, Marcel Proust and Gabriele D’Annunzio, as well as Auguste Renoir and Léon Bonnat. Twelve mansions offered a perfect stage for these intellectual gatherings. As a public manifestation of the family’s economic and social power, the historicist eclecticism of these properties aimed to represent the owners as a new phalanx of the old nobility. While Forge-Philippe’s manor (Wallonia), Gérardmer’s chalet (Vosges) and Villa della Selva (Umbria) expressed a certain openness to the twentieth century novelties, the three residences rented by the family (Hôtel du Plessis-Bellière, Paris; Palazzo Núñez-Torlonia, Rome; Château de la Jonchère, Yvelines) and the two properties of Meyer Joseph, as well as Rue de Bassano’s mansion (Paris) or the castles of Champs (Seine-et-Marne), Bergeries (Essonne) and Torre Alfina (Latium) dressed up their nineteenth century spaces with Ancien Régime motifs. Thanks to their historical knowledge and taste, the architects Destailleur, Giuseppe Partini and Eugène Ricard, as well as the landscapers Henri and Achille Duchêne, were able to bend the Middle Age, the Renaissance and the 18th century’s “grammars” to their patrons’ taste and ambitions.
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Bouty, Olivier. "Energie d'interaction d'échange à grande distance internucléaire dans une molécule diatomique." Lyon 1, 1994. http://www.theses.fr/1994LYO10100.
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Cette these presente la generalisation de la methode dite asymptotique d'evaluation de l'energie d'interaction d'echange entre electrons de valence pour des systemes diatomiques, a des distances internucleaires r intermediaires et grandes. Nous decrivons tout d'abord les fondements de la methode et nous l'etendons a l'interaction entre atomes a couche ouverte de n'importe quelle symetrie spatiale. Puis, nous discutons la validite et la compatibilite de certaines approximations qui sous-tendent la methode par rapport aux hypotheses physiques du probleme. Nous presentons les resultats fournis par la methode asymptotique pour les etats electroniques de molecules diatomiques composees d'atomes mono et multielectroniques, en couplage a) et c) de hund. Puis, nous introduisons les effets d'interaction entre une configuration ionique et des configurations covalentes, ces effets s'averant importants pour decrire correctement certains etats de dimeres d'alcalins a grand r. Finalement, nous presentons des resultats numeriques pour les molecules na2, li2, k2 ainsi que pour les molecules co et o2. Pour les dimeres d'alcalins, des courbes completes d'energie potentielle a grande distance sont presentees en couplage a) et c) de hund pour les dissociations ns+np les plus basses. Elles sont en bon accord avec des resultats issus d'autres modeles ou calculs ab initio, ainsi qu'avec les courbes experimentales disponibles. Les molecules co et o2 sont etudiees lorsque leurs atomes sont dans l'etat fondamental. Nous nous attachons en particulier aux etats quintuplets qui presentent des minima a grande distance internucleaire et montrons que ceux-ci sont bien decrits par la methode proposee. Une application du calcul de l'echange au dimere de o2 est egalement presentee, montrant un bon accord qualitatif avec des resultats ab initio. Une conclusion sur les differentes possibilites d'extension et d'amelioration de cette methode termine ce travail
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Hussein, Khaled. "Etude à grande distance internucléaire de l'état fondamental des molécules Na2 et KH et transferts collisionnels résonnants entre états électroniques de Na2 et Li2." Lyon 1, 1985. http://www.theses.fr/1985LYO19024.
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I. Etude de la structure des etats fondamentaux de na::(2) et kh par spectrometrie de fluorescence induite par laser, a transformee de fourier. Deduction des courbes d'energie potentielle jusqu'a des niveaux proches de leurs limites de dissociation. Observation d'un transfert d'energie collisionnel entre etats electroniques b**(1)pi ::(u) et (2) **(1)sigma ::(g)**(+) de na::(2). Ii. Description d'un formalisme pour calculer la probabilite de transition de transfert d'energie collisionnel au 1er ordre, a l'approximation de born de la matrice de diffusion atome-molecule diatomique. Calcul de la probabilite de transition au 2eme ordre et du terme d'interference au 1er et 2eme ordre. Application au calcul des sections efficaces des processus na::(2)(b**(1)pi ::(u),v,j) + na(3p**(2)p) -> na::(2)( (2) **(1)sigma ::(g)**(+),v',j') + na(3p **(2)p) + delta e et li::(2)(a**(1)sigma ::(u)**(+),v,j) + li(2s **(2)s) -> li::(2)(x**(1)sigma ::(g)**(+),v',j') + li(2p **(2)p) + delta e
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Laslier, Benoît. "Dynamique stochastique d’interface discrète et modèles de dimères." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10110/document.
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Nous avons étudié la dynamique de Glauber sur les pavages de domaines finies du plan par des losanges ou par des dominos de taille 2 × 1. Ces pavages sont naturellement associés à des surfaces de R^3, qui peuvent être vues comme des interfaces dans des modèles de physique statistique. En particulier les pavages par des losanges correspondent au modèle d'Ising tridimensionnel à température nulle. Plus précisément les pavages d'un domaine sont en bijection avec les configurations d'Ising vérifiant certaines conditions au bord (dépendant du domaine pavé). Ces conditions forcent la coexistence des phases + et - ainsi que la position du bord de l'interface. Dans la limite thermodynamique où L, la longueur caractéristique du système, tend vers l'infini, ces interfaces obéissent à une loi des grand nombre et convergent vers une forme limite déterministe ne dépendant que des conditions aux bord. Dans le cas où la forme limite est planaire et pour les losanges, Caputo, Martinelli et Toninelli [CMT12] ont montré que le temps de mélange Tmix de la dynamique est d'ordre O(L^{2+o(1)}) (scaling diffusif). Nous avons généralisé ce résultat aux pavages par des dominos, toujours dans le cas d'une forme limite planaire. Nous avons aussi prouvé une borne inférieure Tmix ≥ cL^2 qui améliore d'un facteur log le résultat de [CMT12]. Dans le cas où la forme limite n'est pas planaire, elle peut être analytique ou bien contenir des parties “gelées” où elle est en un sens dégénérée. Dans le cas où elle n'a pas de telle partie gelée, et pour les pavages par des losanges, nous avons montré que la dynamique de Glauber devient “macroscopiquement proche” de l'équilibre en un temps L^{2+o(1)}We studied the Glauber dynamics on tilings of finite regions of the plane by lozenges or 2 × 1 dominoes. These tilings are naturally associated with surfaces of R^3, which can be seen as interfaces in statistical physics models. In particular, lozenge tilings correspond to three dimensional Ising model at zero temperature. More precisely, tilings of a finite regions are in bijection with Ising configurations with some boundary conditions (depending on the tiled domain). These boundary conditions impose the coexistence of the + and - phases, together with the position of the boundary of the interface. In the thermodynamic limit where L, the characteristic length of the system, tends toward infinity, these interface follow a law of large number and converge to a deterministic limit shape depending only on the boundary condition. When the limit shape is planar and for lozenge tilings, Caputo, Martinelli and Toninelli [CMT12] showed that the mixing time of the dynamics is of order (L^{2+o(1)}) (diffusive scaling). We generalized this result to domino tilings, always in the case of a planar limit shape. We also proved a lower bound Tmix ≥ cL^2 which improve on the result of [CMT12] by a log factor. When the limit shape is not planar, it can either be analytic or have some “frozen” domains where it is degenerated in a sense. When it does not have such frozen region, and for lozenge tilings, we showed that the Glauber dynamics becomes “macroscopically close” to equilibrium in a time L^{2+o(1)}
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Comparat, Daniel. "Formation de molécules froides par photoassociation d'atomes froids de césium. Mise en évidence de forces à longue portée entre atomes froids excités de césium." Phd thesis, Université Paris Sud - Paris XI, 1999. http://tel.archives-ouvertes.fr/tel-00002752.
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Cette thèse porte sur l'étude expérimentale et l'interprétation théorique des processus de photoassociation et de formation de molécules froides de césium, ainsi que sur l'étude des forces dipolaires entre une paire d'atomes de césium froids excités. La photoassociation moléculaire d'atomes froids de césium a été réalisée expérimentalement : deux atomes absorbent un photon pour former une molécule électroniquement excitée dans un état de rotation-vibration donné. L'expérience a permis la première observation de molécules translationnellement froides obtenues après désexcitation spontanée des molécules photoassociées. La forme en double puits des courbes de potentiel des états moléculaires $0_g^- (6s+6p_(3/2))$ et $1_u (6s+6p_(3/2))$ du césium est la clé de l'efficacité du processus. Ces molécules froides formées sont détectées sélectivement par temps de vol après leur photoionisation en ions Cs$_2^+$. Des températures de $20-200\,\mu$K ont été mesurées. La photoassociation offre une méthode de spectroscopie à haute résolution qui permet d'atteindre des états moléculaires de grande élongation, donnant accès aux données asymptotiques. La spectroscopie du puits de potentiel externe de l'état $0_g^-(6s+6p_(3/2))$ du césium a été effectuée et est analysée par une approche R.K.R.. Une théorie unifiée de la photoassociation en champ faible, vue comme une collision assistée par laser, est développée dans ce manuscrit. Les expériences avec les atomes froids permettent l'étude des collisions entre deux atomes soumis à une interaction mutuelle à grande distance de type dipôle-dipôle. Deux systèmes physiques différents sont étudiés : une assemblée d'atomes de Rydberg et la photoassociation. La modification du mouvement d'une paire d'atomes offre la possibilité de ``contrôler" les forces dipolaires et de ``choisir" les vitesses relatives entre atomes.
Books on the topic "Grandi dimore"
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Emanuela, Brignone Cattaneo, and Schezen Roberto, eds. Genova: Edifici storici e grandi dimore. Torino: Umberto Allemandi, 1992.
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Cantone, Gaetana. Case di Capri: Ville, palazzi, grandi dimore. Napoli: Electa Napoli, Edizioni La conchiglia, 1994.
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Giuseppe, Adani, and Ravenna Marco, eds. Le Grandi dimore storiche in Emilia Romagna: Palazzi privati urbani. Milano: Silvana, 1986.
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Massamormile, Massimo Pisani. I Carafa di Roccella: Storie di principi, cardinali, grandi dimore. [Naples, Italy]: Electa Napoli, 1992.
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Le grandi dimore storiche: I palazzi Inghirami e Incontri-Viti a Volterra. Ospedaletto (Pisa): Pacini, 2006.
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fiumi, Museo dei grandi, and Associazione dimore storiche italiane. Sezione Veneto, eds. Tesori dalle dimore storiche del Veneto: Capolavori dal '400 al '700 : [Museo dei Grandi Fiumi, Rovigo, dal 30 gennaio al 13 giugno 2010]. Padova: Programma, 2009.
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Greppi, Consorzio brianteo Villa, ed. Villa Greppi a Monticello Brianza: Una grande dimora neoclassica. [Oggiono, Italy]: Cattaneo, 2005.
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Kliemann, Julian-Matthias. Gesta dipinte: La grande decorazione nelle dimore italiane dal Quattrocento al Seicento. Cinisello Balsamo [Italy]: Silvana, 1993.
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La dimora dei grandi aretini: Mito e storia nel Palazzo della Provincia di Arezzo. Montepulciano (Siena): Le balze, 2003.
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Bisutti, Francesca, and Elisabetta Molteni. La corte della Niobe. Venice: Edizioni Ca' Foscari, 2018. http://dx.doi.org/10.30687/978-88-6969-281-9.
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La coincidenza delle ricorrenze – l’Università Ca’ Foscari compie 150 anni dalla fondazione e sono passati 100 anni dalla fine della Grande guerra – invita a ricordare la coraggiosa, allora ancora giovane, Scuola Superiore di Commercio, che, alla fine del primo conflitto, è costretta a contare i suoi allievi caduti. Dopo due decenni, nel 1943, il Regio Istituto di Economia e Commercio stabilisce di dedicare la corte minore del palazzo Giustinian dei Vescovi alla memoria di tutti gli studenti, i docenti e i dipendenti caduti nei conflitti che fino ad allora avevano insanguinato il secolo. Monumenti, memorie e lapidi sono, in senso figurato, ricomposti nella statua di Niobe, Mater Studiorum che piange la morte violenta dei propri allievi. La corte della Niobe è abitata dalla potente scultura di Napoleone Martinuzzi, suo fulcro visivo ed emotivo, e da tanti, tanti nomi. Il tentativo è stato quindi di cominciare a restituire non solo la storia di quello spazio ma anche delle esistenze e del pensiero di coloro i cui nomi hanno qui trovato dimora. Questi aspetti della memoria sono stati al centro del lavoro di molti e sottotraccia nel lavoro di tutti: di chi si è occupato di delineare un profilo esistenziale dei caduti, di chi ha studiato le ideologie e le politiche che hanno animato i periodi tribolati delle guerre e dei dopoguerra o ha analizzato i processi istituzionali e la mentalità in tempo di guerra, di chi ha indagato sull’assetto e le trasformazioni architettoniche della corte. Ma il problema del tempo passato, delle tracce che lascia e di come conservarle si è posto anche a chi ha compiuto ricerche sui documenti e a chi ha studiato le pietre del sacrario e ne ha avuto cura.
Book chapters on the topic "Grandi dimore"
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Melián, María Clara Fernández, and José Javier Rodríguez de la Fuente. "DIME DE DÓNDE VIENES Y TE DIRÉ QUÉ RECIBES." In La llamada de la gran urbe, 119–45. Instituto de Investigaciones "Gino Germani", 2019. http://dx.doi.org/10.2307/j.ctv1gn3t0p.7.
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Taber, Douglass F. "Carbon–Carbon Bond Construction: The Baran Synthesis of (+)-Chromazonarol." In Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0026.
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Daniel J. Weix of the University of Rochester effected (Org. Lett. 2012, 14, 1476) the in situ reductive coupling of an alkyl halide 2 with an acid chloride 1 to deliver the ketone 3. André B. Charette of the Université de Montréal (not illustrated) developed (Nature Chem. 2012, 4, 228) an alternative route to ketones by the coupling of an organometallic with an in situ-activated secondary amide. Mahbub Alam and Christopher Wise of the Merck, Sharpe and Dohme UK chemical process group optimized (Org. Process Res. Dev. 2012, 16, 453) the opening of an epoxide 4 with a Grignard reagent 5. Ling Song of the Fujian Institute of Research on the Structure of Matter optimized (J. Org. Chem. 2012, 77, 4645) conditions for the 1,2-addition of a Grignard reagent (not illustrated) to a readily enolizable ketone. Wei-Wei Liao of Jilin University conceived (Org. Lett. 2012, 14, 2354) of an elegant assembly of highly functionalized quaternary centers, as illustrated by the conversion of 7 to 8. Antonio Rosales of the University of Granada and Ignacio Rodríguez-García of the University of Almería prepared (J. Org. Chem. 2012, 77, 4171) free radicals by reduction of an ozonide 9 in the presence of catalytic titanocene dichloride. In the absence of the acceptor 10, the dimer of the radical was obtained, presenting a simple alternative to the classic Kolbe coupling. Marc L. Snapper of Boston College found (Eur. J. Org. Chem. 2012, 2308) that the difficult ketone 12 could be methylenated following a modified Peterson protocol. Yoshito Kishi of Harvard University optimized (Org. Lett. 2012, 14, 86) the coupling of 15 with 16 to give 17. Masaharu Nakamura of Kyoto University devised (J. Org. Chem. 2012, 77, 1168) an iron catalyst for the coupling of 18 with 19. The specific preparation of trisubsituted alkenes is an ongoing challenge. Quanri Wang of Fudan University and Andreas Goeke of Givaudan Shanghai fragmented (Angew. Chem. Int. Ed. 2012, 51, 5647) the ketone 21 by exposure to 22 to give the macrolide 23 with high stereocontrol.
Conference papers on the topic "Grandi dimore"
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Medeiros, Linda Maria Avelar, AUGUSTO ELEUTERIO PEREIRA, BIANCA SOUZA DA MATA, CARLOS FERREIRA FILHO, and RAPHAEL GHEDIN SERVIDEI SANT'ANA. "HANSENÍASE NO BRASIL: UMA REVISÃO LITERÁRIA DOS ANOS DE 2010 A 2020." In I Congresso Brasileiro de Estudos Epidemiológicos On-line. Revista Multidisciplinar em Saúde, 2022. http://dx.doi.org/10.51161/epidemion/6956.
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Introdução: Caracterizada como um problema de saúde pública no Brasil, a Hanseníase, doença infectocontagiosa crônica causada pelo Mycobacterium leprae, é alvo de estudos, principalmente no que diz respeito ao seu perfil epidemiológico. Objetivos: Descrever os aspectos epidemiológicos da Hanseníase no Brasil no período de 2010 a 2020. Metodologia: Realizou-se uma revisão bibliográfica na base de dados SciELO com os descritores “Doença Infectocontagiosa”, “Hanseníase”, “Mycobacterium leprae” e “Vigilância Epidemiológica”. Foram incluídos trabalhos científicos da língua portuguesa dos últimos dez anos e excluídos artigos que não abordassem diretamente o tema. Resultados: Após o advento do tratamento da Hanseníase com a poliquimioterapia, a situação epidemiológica da doença sofreu grandes alterações. A doença que antes tinha altos coeficientes de prevalência e incidência, desde 2017 sofreu queda da prevalência, principalmente nos anos 2019 e 2020, havendo variações nessas taxas de acordo com a região estudada. Apesar disso, os valores de incidência mantiveram-se altos, o que somado à redução da prevalência reflete a eficácia da poliquimioterapia, mas também demonstra a necessidade de se intensificar a vigilância ativa dos contactantes para reduzir a taxa de transmissão. O perfil epidemiológico traçado pelas pesquisas entre 2010 e 2020, revelou um predomínio da doença em indivíduos do gênero masculino, cor parda, analfabetos ou indivíduos com ensino fundamental incompleto, e faixa etária entre 30 e 39 anos, sendo a forma clínica dimorfa a mais prevalente entre os doentes. Conclusão: A incidência de casos de Hanseníase no Brasil foi alta nos anos estudados e as suas características epidemiológicas demonstraram uma grande relação da doença com determinantes sociais, sendo de suma importância o incentivo aos estudos epidemiológicos de cada região brasileira, respeitando suas características, visando a criação de estratégias adequadas ao perfil epidemiológico de cada região do país com o intuito de reduzir a taxas de transmissão da doença.
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Medeiros, Linda Maria Avelar, AUGUSTO ELEUTERIO PEREIRA, BIANCA SOUZA DA MATA, CARLOS FERREIRA FILHO, and RAPHAEL GHEDIN SERVIDEI SANT'ANA. "HANSENÍASE NO BRASIL: UMA REVISÃO LITERÁRIA DOS ANOS DE 2010 A 2020." In I Congresso Brasileiro de Estudos Epidemiológicos On-line. Revista Multidisciplinar em Saúde, 2022. http://dx.doi.org/10.51161/epidemion/6956.
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Introdução: Caracterizada como um problema de saúde pública no Brasil, a Hanseníase, doença infectocontagiosa crônica causada pelo Mycobacterium leprae, é alvo de estudos, principalmente no que diz respeito ao seu perfil epidemiológico. Objetivos: Descrever os aspectos epidemiológicos da Hanseníase no Brasil no período de 2010 a 2020. Metodologia: Realizou-se uma revisão bibliográfica na base de dados SciELO com os descritores “Doença Infectocontagiosa”, “Hanseníase”, “Mycobacterium leprae” e “Vigilância Epidemiológica”. Foram incluídos trabalhos científicos da língua portuguesa dos últimos dez anos e excluídos artigos que não abordassem diretamente o tema. Resultados: Após o advento do tratamento da Hanseníase com a poliquimioterapia, a situação epidemiológica da doença sofreu grandes alterações. A doença que antes tinha altos coeficientes de prevalência e incidência, desde 2017 sofreu queda da prevalência, principalmente nos anos 2019 e 2020, havendo variações nessas taxas de acordo com a região estudada. Apesar disso, os valores de incidência mantiveram-se altos, o que somado à redução da prevalência reflete a eficácia da poliquimioterapia, mas também demonstra a necessidade de se intensificar a vigilância ativa dos contactantes para reduzir a taxa de transmissão. O perfil epidemiológico traçado pelas pesquisas entre 2010 e 2020, revelou um predomínio da doença em indivíduos do gênero masculino, cor parda, analfabetos ou indivíduos com ensino fundamental incompleto, e faixa etária entre 30 e 39 anos, sendo a forma clínica dimorfa a mais prevalente entre os doentes. Conclusão: A incidência de casos de Hanseníase no Brasil foi alta nos anos estudados e as suas características epidemiológicas demonstraram uma grande relação da doença com determinantes sociais, sendo de suma importância o incentivo aos estudos epidemiológicos de cada região brasileira, respeitando suas características, visando a criação de estratégias adequadas ao perfil epidemiológico de cada região do país com o intuito de reduzir a taxas de transmissão da doença.
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"PS-090 - APRENDIENDO A VIVIR." In 24 CONGRESO DE LA SOCIEDAD ESPAÑOLA DE PATOLOGÍA DUAL. SEPD, 2022. http://dx.doi.org/10.17579/abstractbooksepd2022.ps090.
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1.- OBJETIVOS: dar a conocer a la poblacion mundial la gran responsabilidad en el area medica, psicoterapeutica y de acompanamiento sobre las personas que tienen una patologia dual asociado al consumo de sustancias psicoactivas. 2.-MATERIAL Y METODOS: utilizamos un tipo de investigacion documental,asi como su diseno cuantitativo y cualitativo (mixto) y la explicacion descriptiva utilizando tambien materiales derivados de la observacion clinica, asi como algunas pruebas psicometricas derivadas de medir psicosis, ansiedad,depresion (como scl-90, beck para ansiedad y depresion)asi como la prueba assitt de medicion de sus grado de consumo de sustancias asi como las historias clinicas psicologicas y medicas para determinar si el uso y abuso proviene de alguna situacion de la ninez o adolescencia o meramente por solo el uso de sustancias psicoactivas. 3.-RESULTADOS Y CONCLUSIONES:el 94% de los usuarios hombres pudimos detectar que antes de consumir sustancias fueron vulnerables a decir que si a las drogas o alcohol y que tenia una relacion con la hiperactividad o deficit de atencion o las dos juntas (mixta). Tambien pudimos investigar que el 78% de los usuarios mujeres pudimos detectar que antes de consumir sustancias fueron vulnerables a decir qque si a las drogas o alcohol y que tenia una relacion con el tlp (transtorno limite de personalidad y sus derivados. Tambien dentro del la exploracion nos dimos cuenta de la importancia de diagnosticar como transtorno mental o del aprendizaje y su diferencia en su aplicación del tratamiento contra las adicciones.
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Nagora García, Amparo. "Metodología docente innovadora de la enseñanza de las Matemáticas Financieras bajo el escenario del COVID-19." In IN-RED 2021: VII Congreso de Innovación Educativa y Docencia en Red. Valencia: Universitat Politècnica de València, 2021. http://dx.doi.org/10.4995/inred2021.2021.13779.
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En este trabajo se presenta una innovación docente aplicada a un grupo de Matemáticas Financieras del Grado de Negocios Internacionales y su adaptación al contexto del COVID-19. Con el objetivo de mejorar los resultados académicos y favorecer un aprendizaje en conocimientos y competencias que sea significativo y en línea con las directrices del Espacio Europeo de Educación Superior, se aplica el aula inversa combinada con otras metodologías activas cuya filosofía la resume “Dime y lo olvido, enséñame y lo recuerdo, involúcrame y lo aprendo” (B. Franklin). Los resultados académicos y de una encuesta ad-hoc revelan una consecución satisfactoria de los objetivos de la innovación.
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Schinco, P. C., A. Fusaro, M. Bazzan, A. Pannocchia, A. Pileri, and G. Tamponi. "INTERFERENCE OF MONOCLONAL IMMUNOGLOBULINS ON PLATELETS AND WHOLE BLOOD AGGREGATION." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643195.
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We studied 31 patients with monoclonal gammopathy (MG), 10 of them secreting monoclonal antibodies (MoAb) of the G class, 13 of them IgM and 8 IgA. We also studied 15 healthy age- and sex-matched control subjects. On each subject we evaluated whole blood aggregation (WBA) in response to ADP, collagen, epinephrine and arachidonic acid in parallel with PRP aggregation according to the method of Born. We wondered whether WBA could provide us further information on the interference of MoAb on platelet function. Agonists and concentrations which yielded statistically significant results in comparison with controls will be reported.IgM MG: Increased WBA to epinephrine 5 and 10 μM (p < 0.01) and ADP 4 and 6 μM (p < 0.001). Increased PRP aggregation to ADP 1 μM (p < 0.001) and collagen 1 μg/ml (p < 0.001).IgA MG: increased WBA to ADP 1 μM (p < 0.001). No difference in PRP aggregation.IgG MG: no difference in WBA. Reduced PRP aggregation in response to ADP 1 μM (p < 0.01) and arachidonic acid 0.5 mM (p < 0.01).We conclude that high molecular weight Ig (IgM pentamers and IgA dimers) seem to play a role in WBA, causing an increased aggregatory response when measured as impedance variation; on the other hand, low molecular weight Ig (IgG) seem to interfere directly with platelet function, causing a decreased aggregation. The mechanism underlying this phenomenon is still unclear.Supported by Grant n° 13 by Regione Piemonte.
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Martinez Torrecilla, Carmen Bibiana, Manuel Perez Aixendri, Antonio Tomas Marin, and Antonio Naharro Navarro. "Sinergias entre arte, paisaje natural y tecnología a través de "Dime algo dulce, cariño"." In IV Congreso Internacional de Investigación en Artes Visuales. ANIAV 2019. Imagen [N] Visible. Valencia: Universitat Politècnica de València, 2019. http://dx.doi.org/10.4995/aniav.2019.9426.
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La investigación en las conexiones que se generan cuando unimos el barro con las nuevas tecnologías, impulsan la creación de la obra “DIME ALGO DULCE, CARIÑO”, presentada en la XVI Edición de ARTE EN LA TIERRA, que se celebró el pasado agosto en La Rioja. Para realizar esta obra construimos seis esculturas de gran formato con una tonelada de barro, inspirándonos en los respiraderos naturales de bodegas del patrimonio local, decisión que le otorgó un aura de permanencia. Tres de los volúmenes ocultaban en su interior unas grabadoras con sensor de voz que registraba los mensajes que dejaba el espectador al planeta tierra. Transformamos con “DIME ALGO DULCE, CARIÑO” el paisaje del Valle de Ocón. Creamos un espacio natural de interacción, un ambiente sensible en el campo de labranza que nos cedió un lugareño. Para conseguirlo, eliminamos la tecnología a la vista de los espectadores, logrando crear un espacio en el que el visitante se reconectaba a la tierra y de una manera espontánea se comunicaba con ella. Las esculturas, los respiraderos de barro, se convirtieron en canales de comunicación configurando un espacio totémico, un ambiente sensible capaz de recoger las emociones de los visitantes. Así, tecnología, narración y espacio se funden, creando un nuevo tipo de relación hombre máquina caracterizada por la espontaneidad y en la que predomina el factor humano (Molina 2008). Con el material recopilado en las grabaciones, hemos recreado el entorno en un mundo virtual online. Para ello, hemos modelado en 3D un entorno virtual, interpretando las seis esculturas y el terreno que las rodeaba. Este entorno lo hemos introducido en una web y podemos navegar por él con una interacción sencilla. A cada una de las esculturas le hemos asignados 11 mensajes de voz, de este modo el usuario podrá escuchar, acercándose a las esculturas.
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Houranieh, A., B. Kudryk, G. L. Davis, R. K. Ito, B. E. Statland, and E. J. Yunis. "SPECIFICITY OF MONOCLONAL ANTIBODIES (MABS) TO FIBRINOGEN/FIBRIN MOLECULE USING THE AVIDIN-BIOTIN IMMUNOPEROXIDASE STAINING OF FROZEN SECTIONS OF HUMAN FIBRIN." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643324.
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To study the effect of Factor XHIa mediated cross-linking of fibrin on the specificity of MAb/TD-1 (specific for the D-dimer of the DD/E region of human cross-linked [XL] fibrin, MAb/T2Gls (specific for the amino terminal region of β chain, β 15-42 and Fibrin II [ des AABB fibrinogen ]) and MAb/l-8C6 (specific for fibrinogen, Fibrin I [ des AA fibrinogen ] and B8 1-42) an Avidin Biotin Immunoperoxidase staining of frozen sections of human fibrin was used. The three monoclonals were applied as first antibodies in the Vectastain ABC Kit ( Vector Laboratories, Burlingame, CA ). Clots were prepared from Imco fibrinogen using 0.015 M Na2HPO4, 0.075 M NaCL, pH 6.35. Where applicable, EDTA 0.01 M was used in the buffer. Bovine thrombin 1 u/ml was added and the clots were incubated overnight at 20°C. Frozen sections were prepared and stained. Kabi grade (L) fibrinogen was also used, but failed to clot in the presence of EDTA. The results of the comperative study were as follows:The positive reaction with T2Gls in both clots preparations is due to the presence of the. neoepitope in cross-linked and noncross linked Fibrin II. The specificity of TD-1 for cross-linked fibrin is supported by a positive reaction in the normal clot, while the reaction was very weak in the presence of EDTA. Due to the cleavage by thrombin of Bβ (Argininel4-Glycinel5) MAb/l-8C6 was negative in both clots. These results indicate, that the Avidin-Biotin Immunoperoxidase staining of frozen sections of human fibrin, is useful for the evaluation of monoclonal antibodies specificity to fibrinogen/fibrin molecule.
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Shainoff, John R., Youko Hishikawa-Itoh, Fred M. Lucas, Robert Graor, and Bernadine Healy. "IMMUNOELECTROPHORETIC CHARACTERIZATION OF SYSTEMIC FIBRINOGEN DURING THROMBOLYSIS OF PERIPHERAL ARTERIAL EMBOLI WITH tPA." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643889.
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Prompted by uncertainties over the possibility of ex-vivo alterations of fibrinogen in plasma samples from patients receiving thrombolytic agents, we sought to 1) use sodium dodecyl sulfate (SDS) and mild acidification to pH 5 as a general means for inhibiting post-sampling proteolysis, and 2) assess the chemical state of fibrinogen by immuno-electrophoretically profiling the molecular weight distribution of the fibrinogen-related antigens in the sample. Blood samples taken into EDTA and PPACK were immediately centrifuged, and plasma diluted 5X in 2% SDS and 0.04% monochloroacetic acid. Such samples showed no changes in molecular weight distribution of fibrinogen-related antigens over 7 days storage at room temperature when analyzed by SDS-eleetro-phoresis on 3% glyoxyl agarose foHowed by fixation with NaCNBHg3 and staining with fluorescent, affinity-purified anti-fibrinogen antibody. The method of study was applied to 16 patients with occlusive peripheral arterial emboli, all of which were successfully treated by catheter-directed administration of tissue plasminogen activator (tPA). All patients presented abnormally high levels of degraded (predominantly 170-300 kD) and dimeric forms of fibrinogen both prior and subsequent to treatment, and only 3 of the 16 patients underwent appreciable change in content or composition of fibrinogen derivatives in course of treatment. Concentrations of dimers ranged from 6 to 23 percent of the total fibrinogen. De novo elevations in degraded forms of fibrinogen observed to accompany treatment of 3 patients were reflected in prolongation of thrombin time while tests of sulfite precipitation underwent relatively minor change. The more frequent absence of change in content of derivatives, particularly the dimeric forms suggestive of a coagulopathic process, indicated that they were derived systemically rather than from the occluding thrombus that was removed by treatment. The findings raise a prospect that the clinically significant thrombosis in these patients may be symptomatic of a much more generalized vascular coagulopathic process. The absence of measurable change in molecular composition of fibrinogen-related antigens in course of successful treatment of these patients attests to the efficacy of tPA as a thrombolytic agent. Support: NIH Grants HL-19361 and HL-19767.
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Cipolla, Leonardo, Augusto Di Gianfrancesco, Dario Venditti, Giuseppe Cumino, and Stefano Caminada. "Microstructural Evolution During Long Term Creep Tests of 9%Cr Steel Grades." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/creep2007-26030.
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In the last two decades the service pressure and temperature of components for advanced power plants increased significantly and more severe requirements on strength, corrosion resistance and creep properties were imposed on high temperature steels. To comply with these requirements, several new 9–12%Cr martensitic steels were developed and some of them, such as ASTM Grades 91, 911 and 92 are currently used in new high efficiency Ultra Super Critical power plants. The initial evaluation of their creep strength above 550°C was defined with relatively short term tests, but the long experience in service and long term creep laboratory tests showed that the original estimation of creep strength values were not reliable and a reduction of the creep resistance occurred at long service time. Short creep tests (elaborated with time-temperature-parameter methods, i.e. Larson Miller equation) usually give an over-estimation of the long-term creep properties of 9%Cr steels. The results of the creep assessments of Grade 92 (Japanese NF616) are an example of the significant lowering of the creep properties: the creep resistance of this grade was initially evaluated in 600°C/160MPa/105h by means extrapolation of short creep tests, within 103 hours; recently the creep strength was reduced down to 113MPa (ECCC assessment, 2005). Moreover some premature failures of Japanese Grade PI 22 took place and similar problems appeared on other 12%Cr steels. The lowering of creep strength in 9–12%Cr steels at long times is a consequence of the evolution of their microstructure during high temperature service. The causes of this phenomenon in Grades 91, 911 and 92 are examined in this article, paying special attention to the metallurgical explanation. The most evident changes in the microstructure of 9%Cr steels occur with the nucleation of Laves-phase as well as the nucleation of Z-phase at longer times. The precipitation of Laves phase has two relevant aspects by the creep strength point of view. On one hand, high amounts of Mo and W contents are incorporated in this phase, causing a depletion of these elements from the solid solution and thus a reduction of their contribution to the overall creep resistance. On the other hand, the increased volume fraction of secondary phases leads to a higher precipitation strengthening during the first precipitation phase: at the beginning, the precipitation of fine Laves phase increases the creep resistance; however if the coarsening rate is not taken under control, the mean diameter of these particles reaches micrometric dimensions with a detrimental effect on creep behaviour within 103 hours in the range 600°C–650°C. The high coarsening rate of Laves phase is therefore the major cause of the lowering of creep properties of Grades 91, 911 and 92. Coarsening of Laves phase particles over a critical size triggers the cavity formation and the consequent brittle intergranular fracture. Transition from ductile fracture to brittle intergranular fracture often occurs in long-term creep at the onset of coarsening of Laves particles, which result to be the preferential site for cavities nucleation in the 9%Cr steels. Z-phase was recognized in 9%Cr steels after long term exposure, but in far smaller amount than on 12%Cr steels: no dramatic drop in volume fraction of MX was observed in association to the nucleation of this phase, therefore it is believed that the modified Z-phase does not affect significantly the long term creep properties of Grades 91, 911 and 92. The dimple pattern is typical of ductile fracture, which occurs for short service period (hence highest stress). At low stresses, cavities are formed at the triple grain junctions at which Laves particles are often found, causing wedge crack, otherwise isolated cavities can form independently at coarse Laves phase particles (Figure 13). The latter type is often observed after long-term creep in the interganular fracture region. In both cases, brittle fracture occurs at the onset of coarsening of Laves particles, which result to be the preferential site for cavities nucleation in the 9%Cr steels.
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Yekta, Kaveh. "Application of Finite Element Method in Coiled Tubing Services." In SPE/ICoTA Well Intervention Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204429-ms.
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Abstract The recent development in commercialization and simplification of advanced simulating software provides a unique tool for analysis of different challenges in the oil and gas industry. These commercial packages are designed to be user-friendly and yet be able to perform complex simulations. For a very long time, working with such simulating software required a unique skill set. The enhanced user-interface and different visual aid improved the quality of simulator programs and reduced the level of difficulty of using those programs. Applying such simulating capabilities makes it possible for a better understanding of a vast array of challenges and problems in Coiled Tubing (CT) Services. Building a three-dimensional (3D) model for stress and vibration analysis to simulate the real operational problem is among the advantages of using such a program. The finite element method (FEM) is the mathematical tool that is used in the commercial simulating software. The FEM provides a linear and nonlinear analysis option to solve different types of mechanical problems. The common outputs for such analysis are stress, displacement, and vibration modes. A real-life example of a failed dimple connector due to excessive force was simulated to find the stress and displacement of a specific grade of pipe. In the other case, the impact of vibration of the CT stack on wellhead was simulated and analyzed. The structural analysis of two main components of Coiled Tubing surface equipment such as Gooseneck and CT Reel subjected to actual loads were modeled using FEM. The simulation of each case provides critical information that could not be achieved by any other means due to the complex geometry of the problem in some cases. In each case, the FEM simulation program provides essential information such as stress, vibration mode, and displacement. This information can be used to optimize the design and enhancement of the operating envelope of each case in the well intervention operation. Using the FEM/3D modeling package provides a tool to evaluate and explore the different impacts of loads on CT surface equipment. Utilizing such programs in different applications such as CT, intervention, and completions can be a reliable tool during design, execution, and failure analysis process. Using analytical simulators could replace costly physical testing. On the occasion that the physical testing is required, using the simulated results could optimize the better planning of utilization of sensors for a different position. There are more types of simulations available within these packages, such as fatigue modeling, nonlinear analysis, transient, and impact analysis.