Browsing Artículos 2014 by Issue Date
Now showing items 120 of 106

Interpreting natural language instructions using language, vision and behavior
(2010)We define the problem of automatic instruction interpretation as follows. Given a natural language instruc tion, can we automatically predict what an instruction follower, such as a robot, should do in the environment to ... 
Stopping power of palladium for protons in the energy range 0.3003.100 MeV
(2013)The stopping power of palladium for protons has been measured using the transmission method with an overall uncertainty of around 5% over the energy range Ep=(0.300–3.100) MeV. These stopping power data are then compared ... 
Dose point kernel calculation and modelling with nuclear medicine dosimetry purposes
(2014)Monoclonal labeled antibodies are commonly used for radioimmunotherapy purposes in nuclear medicine. The procedure is based on the deposition of specific radiactivity concentrations on tumoral regions with the aim of ... 
Some totally geodesic submanifolds of the nonlinear Grassmannian of a compact symmetric space
(2014)Let M and N be two connected smooth manifolds, where M is compact and oriented and N is Riemannian. Let E be the Fréchet manifold of all embeddings of M in N, endowed with the canonical weak Riemannian metric. Let ∼ be the ... 
Dosimetry optimization system and integrated software (DOSIS) : a comparison against Fluka code results over a standard phantom
(2014)Actually, dualimaging facilities allow obtainance of both mass and activity patientspecific distributions perfectly correlated, which are important to improve dose distributions estimations and radioimmunotherapy treatment ... 
Experimental determination of <10 10>/ Ψ tilt grain boundary energies in ice
(2014)Ice grain boundary energies γgb relative to the free surface energy γs were determined by studying the topographic details revealed by plastic replicas of the ice grain boundary groovefree surface with a Laser Confocal ... 
Strictly positive solutions for one dimensional nonlinear elliptic problems
(2014)We study the existence and nonexistence of strictly positive solutions for the elliptic problems  in a bounded open interval, with zero boundary conditions, where  is a strongly uniformly elliptic differential operator, ... 
Weighted inequalities for some integral operators with rough kernels
(2014)In this paper we study integral operators with kernels K(x, y) = k1(x − A1y)...km(x − Amy), ki(x) = Ωi(x) xn/qi where Ωi : Rn → R are homogeneous functions of degree zero, satisfying a size and a Dini condition, Ai are ... 
Implementation of several mathematical algorithms to breast tissue density classification
(2014)The accuracy of mammographic abnormality detection methods is strongly dependent on breast tissue characteristics, where a dense breast tissue can hide lesions causing cancer to be detected at later stages. In addition, ... 
Mixing BandtPompe and LempelZiv approaches : another way to analyze the complexity of continuousstate sequences
(2014)In this paper, we propose to mix the approach underlying BandtPompe permutation entropy with LempelZiv complexity, to design what we call LempelZiv permutation complexity. The principle consists of two steps: (i) ... 
Multisolitons with vector mesons on the twosphere
(2014)Recent studies have suggested a strong connection between the static solutions of the 3D Skyrme model and those corresponding to its lowdimensional analog (babySkyrme model) on a twosphere. We have found almost identical ... 
Spherical functions of fundamental Ktypes associated with the ndimensional sphere
(2014)In this paper, we describe the irreducible spherical functions of fundamental Ktypes associated with the pair (G, K) = (SO(n + 1), SO(n)) in terms of matrix hypergeometric functions. The output of this description is that ... 
Nonmodal linear stability of the Schwarzschild black hole
(2014)A proof is given that the space L of solutions of the linearized vacuum Einstein equation around a Schwarzschild black hole is parametrized by two scalar fields, which are gauge invariant combinations of perturbed algebraic ... 
On nonsingular twostep nilpotent Lie algebras
(2014)A 2step nilpotent Lie algebra n is called nonsingular if ad X : n → [n, n] is onto for any X /∈ [n, n]. We explore nonsingular algebras in several directions, including the classification problem (isomorphism invariants), ... 
The cohomology of filiform Lie algebras of maximal rank
(2014)We describe the structure of the cohomology of the filiform Lie algebras and as a module over their (2dimensional) torus of derivations. Our approach relies on the fact that both filiform algebras have an ideal of codimension ... 
On homogeneous Ricci solitons
(2014)We study the evolution of homogeneous Ricci solitons under the bracket flow, a dynamical system on the space Hq,n ⊂ Λ2g∗ ⊗ g of all homogeneous spaces of dimension n with a qdimensional isotropy, which is equivalent to ... 
Permutation entropy applied to the characterization of the clinical evolution of epileptic patients under pharmacological treatment
(2014)Different techniques originated in information theory and tools from nonlinear systems theory have been applied to the analysis of electrophysiological time series. Several clinically relevant results have emerged from ... 
The growth of ice particles in a mixed phase environment based on laboratory observations
(2014)This paper describes new laboratory observations about the size evolution of ice crystals and cloud droplets immersed in a mixedphase cloud. The experiments were performed by using a cloud chamber facility for three ... 
Search for gravitational wave ringdowns from perturbed intermediate mass black holes in LIGOVirgo data from 20052010
(2014)We report results from a search for gravitational waves produced by perturbed intermediate mass black holes (IMBH) in data collected by LIGO and Virgo between 2005 and 2010. The search was sensitive to astrophysical sources ... 
The index of symmetry of compact naturally reductive spaces
(2014)We introduce a geometric invariant that we call the index of symmetry, which measures how far is a Riemannian manifold from being a symmetric space. We compute, in a geometric way, the index of symmetry of compact naturally ...