892 research outputs found
Synchronization and Spin-Flop Transitions for a Mean-Field XY Model in Random Field
No full textWe characterize the phase space for the infinite volume limit of a ferromagnetic mean-field XY model in a random field pointing in one direction with two symmetric values. We determine the stationary solutions and detect possible phase transitions in the interaction strength for fixed random field intensity. We show that at low temperature magnetic ordering appears perpendicularly to the field. The latter situation corresponds to a spin-flop transition
Path-space moderate deviations for a class of Curie–Weiss models with dissipation
No full textWe modify the spin-flip dynamics of the Curie–Weiss model with dissipation in Dai Pra, Fischer and Regoli (2013) by considering arbitrary transition rates and we analyze the phase-portrait as well as the dynamics of moderate fluctuations for macroscopic observables. We obtain path-space moderate deviation principles via a general analytic approach based on the convergence of non-linear generators and uniqueness of viscosity solutions for associated Hamilton–Jacobi equations. The moderate asymptotics depend crucially on the phase we are considering and, moreover, their behavior may be influenced by the choice of the rates
Dynamical moderate deviations for the Curie-Weiss model
No full textWe derive moderate deviation principles for the trajectory of the empirical magnetization of the standard Curie–Weiss model via a general analytic approach based on convergence of generators and uniqueness of viscosity solutions for associated Hamilton–Jacobi equations. The moderate asymptotics depend crucially on the phase under consideration.Applied Probabilit
Path-space moderate deviation principles for the random field curie-weiss model
No full textWe analyze the dynamics of moderate fluctuations for macroscopic observables of the random field Curie-Weiss model (i.e., standard Curie-Weiss model embedded in a site-dependent, i.i.d. random environment). We obtain path-space moderate deviation principles via a general analytic approach based on convergence of nonlinear generators and uniqueness of viscosity solutions for associated Hamilton-Jacobi equations. The moderate asymptotics depend crucially on the phase we consider and moreover, the space-time scale range for which fluctuations can be proven is restricted by the addition of the disorder.</p
Statut et comportement social du Grand dauphin Tursiops truncatus Mont. 1821 dans le bassin d’Arcachon
No full textA sedentary group of six bottlenose dolphins (Tursiops truncatus) has been photoidentified in the Bassin d’Arcachon, S.W. France. The social structure of this group has been determined from statistical analysis of swimming associations, as shown on pictures taken monthly from January 1989 to December 1991. The group includes a mother-infant pair, two females escorting the pair, and a pilot-watcher whose sex remains unknown. The sixth dolphin is a young solitary female which sometimes joins the group, while becoming increasingly familiar towards humans when alone.
The shyness of the oldest dolphins could be explained by their past experiences with humans (dolphins were still hunted in this area in the sixties !). However their cautious behaviour seems also to be well adapted to their difficult environment, a semi-closed bay, with shallow waters and numerous oyster farms.Ferrey Marc, Collet Anne, Guinet Christophe. Statut et comportement social du Grand dauphin Tursiops truncatus Mont. 1821 dans le bassin d’Arcachon. In: Revue d'Écologie (La Terre et La Vie), tome 48, n°3, 1993. pp. 257-278
Le Bacha De Smirne : Comédie En Un Acte Et En Prose ; Réprésentée par les Comédiens Italiens Ordinaires de Sa Majesté, pour la premiére fois le 9. Septembre 1747. / Par M***
No full textSchlüsselseiten aus dem Exemplar der FB Gotha: Poes 8° 00895/03 (03)Nach Bn opale plus kann sowohl Antoine Petit als auch Jean Baptiste Collet de Messine Verf. sein.Fingerprint nach Ex. der FB Gotha und der ULB Sachsen-AnhaltErscheinungsvermerk im Kolophon: A Paris, Chez Cailleau, rue S. Jacques, au-dessus de la rue Mathurins, à S. André. M. DCC. XLVIII. - Im Kolophon: De l'Imprimerie de Ballard Fils, rue S. Jean de Beauvais, à Sainte Cécile
Panoramic Integral-Field Spectrograph: Ultraspectral Data to Understand the History of the Universe
No full textInternational audienc
Path-space moderate deviations for a Curie-Weiss model of self-organized criticality
No full textThe dynamical Curie-Weiss model of self-organized criticality (SOC) was introduced in (Ann. Inst. Henri Poincaré Probab. Stat. 53 (2017) 658-678) and it is derived from the classical generalized Curie-Weiss by imposing a microscopic Markovian evolution having the distribution of the Curie-Weiss model of SOC (Ann. Probab. 44 (2016) 444-478) as unique invariant measure. In the case of Gaussian single-spin distribution, we analyze the dynamics of moderate fluctuations for the magnetization. We obtain a path-space moderate deviation principle via a general analytic approach based on convergence of non-linear generators and uniqueness of viscosity solutions for associated Hamilton-Jacobi equations. Our result shows that, under a peculiar moderate space-time scaling and without tuning external parameters, the typical behavior of the magnetization is critical
Computational surgery and dual training: computing, robotics and imaging
No full textThis critical volume focuses on the use of medical imaging, medical robotics, simulation, and information technology in surgery. It offers a road map for computational surgery success, discusses the computer-assisted management of disease and surgery, and provides a rational for image processing and diagnostic. This book also presents some advances on image-driven intervention and robotics, as well as evaluates models and simulations for a broad spectrum of cancers as well as cardiovascular, neurological, and bone diseases. Training and performance analysis in surgery assisted by robotic systems is also covered. This book also: · Provides a comprehensive overview of the use of computational surgery and disease management · Discusses the design and use of medical robotic tools for orthopedic surgery, endoscopic surgery, and prostate surgery · Provides practical examples and case studies in the areas of image processing, virtual surgery, and simulation training Computational Surgery and Dual Training: Computing, Robotics and Imaging is an ideal book for graduate students and professionals in the area of bioengineering, computational science, computational medicine, and medical residents in surgery
[Carte] des chemins de fer départementaux dans le Déparment de la Meurthe. 1 : 320 000 / Collet, conducteur des Ponts et Chaussées
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