Search results for "Functions"
showing 10 items of 1066 documents
Dimension reduction for $-Delta_1$
2012
A 3D-2D dimension reduction for $-\Delta_1$ is obtained. A power law approximation from $-\Delta_p$ as $p \to 1$ in terms of $\Gamma$- convergence, duality and asymptotics for least gradient functions has also been provided.
Value of the Axial-Vector Coupling Strength in β and ββ Decays : A Review
2017
Two-neutrino ββ decays and low-lying Gamow-Teller β− strength functions in the mass range A=70–176
2017
We apply the proton-neutron deformed quasiparticle random-phase approximation (pn-dQRPA) to describe the low-lying (E 6 MeV) 1+ Gamow-Teller (GT) strength functions in odd-odd deformed nuclei which participate as intermediate nuclei in two-neutrino double-β-decay (2νββ) transitions within the mass range A = 70–176. In deriving equations of motion we use a single-particle basis with projected angular momentum, provided by the diagonalization of a spherical mean field furnished with a quadrupole-quadrupole interaction. The schematic residual Hamiltonian contains pairing and proton-neutron interaction terms in particle-hole (ph) and particle-particle (pp) channels, with constant strengths. By …
Multi-modal search for multiobjective optimization: an application to optimal smart grids management
2012
This paper studies the possibility to use efficient multimodal optimizers for multi-objective optimization. In this paper, the application area considered for such new approach is the optimal dispatch of energy sources in smart microgrids. The problem indeed shows a non uniform Pareto front and requires efficient optimal search methods. The idea is to exploit the potential of agents in population-based heuristics to improve diversity in the Pareto front, where solutions show the same rank and are thus equally weighted. Since Pareto dominance is at the basis of the theory of multi-objective optimization, most algorithms show the non dominance ranking as quality indicator, with some problem i…
KIELELLINEN ERITYISVAIKEUS – EI PELKÄSTÄÄN KIELELLISTEN TAITOJEN ONGELMA
2016
Kielellisen erityisvaikeuden ajatellaan olevan ensisijaisesti kielellisten taitojen ongelma. On kuitenkin todennäköistä, että kielelliseen erityisvaikeuteen liittyy myös ei-kielellisiä vaikeuksia. Tämän artikkelin tavoitteena on luoda katsaus eksekutiivisiin toimintoihin ja prosessointinopeuteen osana kielellistä erityisvaikeutta. Tutkimusten perusteella näyttää siltä, että kielelliseen erityisvaikeuteen liittyy kognitiiviseen joustavuuteen, inhibitioon, työmuistiin, tarkkaavuuteen sekä prosessointinopeuteen liittyviä vaikeuksia ainakin osalla kielihäiriöistä lapsista. Kielellisen erityisvaikeuden kliinisessä diagnostiikassa ja kuntoutuksessa on syytä huomioida myös ei-kielelliset vaikeudet…
Multipactor radiation analysis within a waveguide region based on a frequency-domain representation of the dynamics of charged particles
2009
[EN] A technique for the accurate computation of the electromagnetic fields radiated by a charged particle moving within a parallel-plate waveguide is presented. Based on a transformation of the time-varying current density of the particle into a time-harmonic current density, this technique allows the evaluation of the radiated electromagnetic fields both in the frequency and time domains, as well as in the near- and far-field regions. For this purpose, several accelerated versions of the parallel-plate Green's function in the frequency domain have been considered. The theory has been successfully applied to the multipactor discharge occurring within a two metal-plates region. The proposed…
Memory for time intervals is impaired in left hemi-Parkinson patients.
2004
The basal ganglia have been proposed as one of the neural correlates of timekeeping functions. Both encoding and memory retrieval components for time perception are impaired in Parkinson's disease (PD). The aim of our study was to investigate in hemi-Parkinsonian patients the existence of a specific alteration in memory for time depending on the affected side, to better understand the contribution of the left or right basal ganglia circuits in different components of time perception. Right and left hemi-PD patients performed a time reproduction task in which they were required to reproduce in the same session short (5 s) and long (15 s) time intervals, in off- and on-therapy condition. Whil…
The Large Hadron–Electron Collider at the HL-LHC
2021
The Large Hadron-Electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) to the energy and intensity frontier of particle physics. Exploiting energy-recovery technology, it collides a novel, intense electron beam with a proton or ion beam from the High-Luminosity Large Hadron Collider (HL-LHC). The accelerator and interaction region are designed for concurrent electron-proton and proton-proton operations. This report represents an update to the LHeC's conceptual design report (CDR), published in 2012. It comprises new results on the parton structure of the proton and heavier nuclei, QCD dynamics, and electroweak and top-quark physics. It is shown how the LH…
Poincaré Type Inequalities for Vector Functions with Zero Mean Normal Traces on the Boundary and Applications to Interpolation Methods
2019
We consider inequalities of the Poincaré–Steklov type for subspaces of H1 -functions defined in a bounded domain Ω∈Rd with Lipschitz boundary ∂Ω . For scalar valued functions, the subspaces are defined by zero mean condition on ∂Ω or on a part of ∂Ω having positive d−1 measure. For vector valued functions, zero mean conditions are applied to normal components on plane faces of ∂Ω (or to averaged normal components on curvilinear faces). We find explicit and simply computable bounds of constants in the respective Poincaré type inequalities for domains typically used in finite element methods (triangles, quadrilaterals, tetrahedrons, prisms, pyramids, and domains composed of them). The second …
E-tutoring nella didattica telematica. Pratiche di modellamento.
2021
Il lavoro si propone di delineare quali evoluzioni la figura dell'e-tutor stia attraversando nel contesto della didattica telematica alla luce dei cambiamenti che i media digitali e sociali introducono (Rivoltella, 2017; Ferrari, 2019). Resta fondamentale la dimensione comunicativa su cui tale ruolo si basa (Rivoltella, 2006), che evidenzia la necessità di competenze di moderazione online, allestimento di gestione dei gruppi e animazione di online communities.All'e-tutor, in particolare, è richiesta consapevolezza sull'attività di modellamento che svolge nei confronti dei corsisti attraverso le sue attività comunicative e didattiche (interattive e…