Search results for " mani"
showing 10 items of 623 documents
Long time behavior for a dissipative shallow water model
2013
We consider the two-dimensional shallow water model derived by Levermore and Sammartino (Nonlinearity 14,2001), describing the motion of an incompressible fluid, confined in a shallow basin, with varying bottom topography. We construct the approximate inertial manifolds for the associated dynamical system and estimate its order. Finally, considering the whole domain R^2 and under suitable conditions on the time dependent forcing term, we prove the L^2 asymptotic decay of the weak solutions.
BONE AND JOINT MANIFESTATIONS IN PATIENTS AFFECTED BY INFLAMMATORY BOWEL DISEASE.
2011
Onset of the symptoms in patients with ulcerative colitis and Crohn's disease is sometimes characterized by osteoarticular manifestations. The usual presentation of peripheral arthritis is asymmetric, polyarticular and migrant, often involving large joints of the upper and lower limbs, unlike rheumatoid arthritis. This study analyses the statistical incidence of arthritic manifestations in elderly patients with inflammatory bowel disease.
A robust forward-displacement analysis of spherical parallel robots
2009
The forward-displacement analysis of spherical parallel robots (SPRs) is revisited. A robust approach, based on the input–output (I/O) equation of spherical four-bar linkages, is proposed. In this approach, the closed-loop kinematic chain of a SPR is partitioned into two four-bar spherical chains, whose I/O equations are at the core of the analysis reported here. These equations lead to a trigonometric equation in the joint angles, which is solved semigraphically to obtain the joint variables for the determination of the moving plate orientation. Examples are included to demonstrate the application of the method.
Application of Chemical Cues in Arthropod Pest Management for Orchards and Vineyards
2013
This chapter reviews the literature on semiochemical-parasitoid systems in perennial crops. The first part of the chapter analyses the possible effects of pheromone-based tactics on parasitoid efficacy. In both orchards and vineyards, the most successful application of synthetic sex pheromones has been their use as mating disruptants. It also discusses the possibility of using parasitoid pheromones to directly affect parasitoid behaviour. The second part of the chapter summarizes research in orchards and vineyards that has tested whether synthetic chemical cues such as herbivore-induced plant volatiles (HIPVs) and host-associated volatiles (HAVs) can be used to manipulate parasitoid behavio…
Some topological invariants for three-dimensional flows
2001
We deal here with vector fields on three manifolds. For a system with a homoclinic orbit to a saddle-focus point, we show that the imaginary part of the complex eigenvalues is a conjugacy invariant. We show also that the ratio of the real part of the complex eigenvalue over the real one is invariant under topological equivalence. For a system with two saddle-focus points and an orbit connecting the one-dimensional invariant manifold of those points, we compute a conjugacy invariant related to the eigenvalues of the vector field at the singularities. (c) 2001 American Institute of Physics.
Māsas rīcības infekcijas kontroles nodrošināšanā intensīvās terapijas nodaļā
2021
Bakalaura darba tēma: „Māsas rīcība infekcijas kontroles nodrošināšanā intensīvās terapijas nodaļā”. Neskatoties uz modernās medicīnas tehnoloģiskajiem sasniegumiem, ar veselības aprūpi saistītas infekcijas turpina izplatīties un pieder pie visaktuālākām mūsdienu problēmām, it īpaši intensīvās terapijas nodaļā. Tas bieži vien ir ilgstošas, smagas, izraisa nopietnas problēmas un pat var novest pie pacienta nāves. Šīs infekcijas ir novēršamas, tāpēc jāpievērš liela uzmanība infekciju profilaktiskiem pasākumiem, jānovēro un jāizvērtē māsas rīcība un procedūru izpildes kvalitāte, no kuras ir atkarīga infekciju izplatīšanās kontrole. Bakalaura darbs ir izstrādāts ar mērķi noskaidrot māsas rīcību…
Infinite Dimensional Banach spaces of functions with nonlinear properties
2010
The aim of this paper is to show that there exist infinite dimensional Banach spaces of functions that, except for 0, satisfy properties that apparently should be destroyed by the linear combination of two of them. Three of these spaces are: a Banach space of differentiable functions on R(n) failing the Denjoy-Clarkson property; a Banach space of non Riemann integrable bounded functions, but with antiderivative at each point of an interval; a Banach space of infinitely differentiable functions that vanish at infinity and are not the Fourier transform of any Lebesgue integrable function.
Partial data inverse problems for Maxwell equations via Carleman estimates
2015
In this article we consider an inverse boundary value problem for the time-harmonic Maxwell equations. We show that the electromagnetic material parameters are determined by boundary measurements where part of the boundary data is measured on a possibly very small set. This is an extension of earlier scalar results of Bukhgeim-Uhlmann and Kenig-Sj\"ostrand-Uhlmann to the Maxwell system. The main contribution is to show that the Carleman estimate approach to scalar partial data inverse problems introduced in those works can be carried over to the Maxwell system.
Linearized Calderón problem and exponentially accurate quasimodes for analytic manifolds
2022
In this article we study the linearized anisotropic Calderon problem on a compact Riemannian manifold with boundary. This problem amounts to showing that products of pairs of harmonic functions of the manifold form a complete set. We assume that the manifold is transversally anisotropic and that the transversal manifold is real analytic and satisfies a geometric condition related to the geometry of pairs of intersecting geodesics. In this case, we solve the linearized anisotropic Calderon problem. The geometric condition does not involve the injectivity of the geodesic X-ray transform. Crucial ingredients in the proof of our result are the construction of Gaussian beam quasimodes on the tra…
Regularity of isoperimetric profiles
2008
In this short paper we summerize some results about the analyticity of isoperimetric profiles recently appeared in the specialized literature.