Search results for "CONSTANT"
showing 10 items of 1718 documents
$\Omega$-symmetric measures and related singular integrals
2019
Let $\mathbb{S} \subset \mathbb{C}$ be the circle in the plane, and let $\Omega: \mathbb{S} \to \mathbb{S}$ be an odd bi-Lipschitz map with constant $1+\delta_\Omega$, where $\delta_\Omega>0$ is small. Assume also that $\Omega$ is twice continuously differentiable. Motivated by a question raised by Mattila and Preiss in [MP95], we prove the following: if a Radon measure $\mu$ has positive lower density and finte upper density almost everywhere, and the limit $$ \lim_{\epsilon \downarrow 0} \int_{\mathbb{C} \setminus B(x,\epsilon)} \frac{\Omega\left((x-y)/|x-y|\right)}{|x-y|} \, d\mu(y) $$ exists $\mu$-almost everywhere, then $\mu$ is $1$-rectifiable. To achieve this, we prove first that if …
SAMSLAM: Simulated Annealing Monocular SLAM
2013
This paper proposes a novel monocular SLAM approach. For a triplet of successive keyframes, the approach inteleaves the registration of the three 3D maps associated to each image pair in the triplet and the refinement of the corresponding poses, by progressively limiting the allowable reprojection error according to a simulated annealing scheme. This approach computes only local overlapping maps of almost constant size, thus avoiding problems of 3D map growth. It does not require global optimization, loop closure and back-correction of the poses.
FRA COSTANTINO E I VANDALI. Atti del Convegno Internazionale di Studi per Enzo Aiello (1957-2013), Messina, 29-30 Ottobre 2014, L. De Salvo, E. Calir…
2016
This book brings together the papers presented at the Conference held in Messina at the Department of Ancient and Modern Civilisations on 29 and 30 October 2014 in memory of Vincenzo Aiello. On this occasion, scholars of various nationalities and scientific backgrounds remembered the young colleague who died prematurely with contributions on topics particularly close to him. The papers were divided into two sections: the first on the figure of Constantine, his Fortleben and the political and religious dynamics of the 4th century; the second on the impact of the presence of the Vandals in the Mediterranean basin in the 5th century and the new political geography determined by the conquest of…
El fomento de la mediación y de otros medios alternativos de justicia (también) en relación con la sustracción internacional de menores en Europa
2021
El decidido fomento de la mediación y de otros instrumentos MASC en el ámbito del Derecho de familia internacional constituye una constante, en los últimos tiempos, en el panorama comparado internacional. También en relación con aquellas disputas que involucran a menores. La UE no es ajena a este proceso y contribuye decididamente a éste. Aunque persisten dudas sobre la virtualidad real de estos mecanismos en la práctica diaria internacional.
Search for a Dark Leptophilic Scalar in e(+) e(-) Collisions
2020
Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, which might be substantially lighter than the weak scale. The experimental constraints on additional scalars with masses in the MeV to GeV range could be significantly weakened if they interact predominantly with leptons rather than quarks. At an e+e- collider, such a leptophilic scalar (φL) would be produced predominantly through radiation from a τ lepton. We report herein a search for e+e-→τ+τ-φL, φL→ℓ+ℓ- (ℓ=e, μ) using data collected by the BABAR experiment at SLAC. No significant signal is observed, and we set limits on the φL coupling to leptons in the range 0.04<mφL<7.0 GeV. These bounds s…
Experimental Evidence for an Attractive p-φ Interaction
2021
Physical review letters 127(17), 172301 (2021). doi:10.1103/PhysRevLett.127.172301
Constantí Llombart, dinamitzador de la Renaixença valenciana
2015
Constantí Llombart (València 1848-1893) fou un escriptor que gaudí d’una notable projecció, inicialment, entre les classes populars de la València del seu temps. Sensible als ideals republicans, però, sobretot, gràcies a la seua dedicació periodística -de caire satíric fonamentalment- i, també, al seu interés per bastir una sèrie de plataformes cíviques i editorials amb què donar difusió als ideals renaixencistes, es pot afirmar que la seua fou una contribució d’una vàlua estratègica impagable per al desenvolupament del valencianisme en les primeres dècades del segle XX. Tot i la importància que cal atribuir a Constantí Llombart en un període tan decisiu per a la història de la nostra lleng…
A theoretical study of the 1B2u and 1B1u vibronic bands in benzene
2000
The two lowest bands, 1B2u and 1B1u, of the electronic spectrum of the benzene molecule have been studied theoretically using a new method to compute vibronic excitation energies and intensities. The complete active space (CAS) self-contained field (SCF) method (with six active π-orbitals) was used to compute harmonic force field for the ground state and the 1B2u and 1B1u electronic states. A linear approximation has been used for the transition dipole as a function of the nuclear displacement coordinates. Derivatives of the transition dipole were computed using a variant of the CASSCF state interaction method. Multiconfigurational second-order perturbation theory (CASPT2) was used to obtai…
Quantum-chemical determination of Born–Oppenheimer breakdown parameters for rotational constants: the open-shell species CN, CO+ and BO
2013
The quantum-chemical protocol for computing Born-Oppenheimer breakdown corrections to rotational constants in the case of diatomic molecules is extended to open-shell species. The deviation from the Born-Oppenheimer equilibrium rotational constant is obtained by considering three contributions: the adiabatic correction to the equilibrium bond distance, the electronic contribution to the moment of inertia requiring the computation of the rotational g-tensor, and the so-called Dunham correction. Values for the Born-Oppenheimer breakdown parameters of CN, CO+, and BO in their (2)sigma(+) electronic ground states are reported based on coupled-cluster calculations of the involved quantities and …
Monte Carlo simulations of the solid-liquid transition in hard spheres and colloid-polymer mixtures
2010
Monte Carlo simulations at constant pressure are performed to study coexistence and interfacial properties of the liquid-solid transition in hard spheres and in colloid-polymer mixtures. The latter system is described as a one-component Asakura-Oosawa (AO) model where the polymer's degrees of freedom are incorporated via an attractive part in the effective potential for the colloid-colloid interactions. For the considered AO model, the polymer reservoir packing fraction is eta_p^r=0.1 and the colloid-polymer size ratio is q=sigma_p/\sigma=0.15 (with sigma_p and sigma the diameter of polymers and colloids, respectively). Inhomogeneous solid-liquid systems are prepared by placing the solid fc…