Results 11 to 20 of about 137,818 (86)
On the mean value of the force operator for 1D particles in the step potential [PDF]
Rev. Bras. Ens. Fis. 43, e20200422 (2021), 2021 In the one-dimensional Klein-Fock-Gordon theory, the probability density is a discontinuous function at the point where the step potential is discontinuous. Thus, the mean value of the external classical force operator cannot be calculated from the corresponding formula of the mean value. To resolve this issue, we obtain this quantity directly from the
arxiv +1 more source
Bibliotecaris i innovació docent: l'oportunitat dels plans tutorials i els treballs de fi de grau
, 2016 El paper del bibliotecari docent universitari no ha estat mai ben definit i l'exit de la seva activitat es veu condicionat per la relacio de col·laboracio amb el professorat, el seu reconeixement i nivell d'implicacio i la participacio en la innovacio ...
Nieves González Fernández-Villavicencio +3 more
semanticscholar +1 more source
On Fayet-Iliopoulos terms and de Sitter vacua in supergravity: some easy pieces [PDF]
JHEP01 (2012) 002, 2011 We clarify a number of issues on Fayet-Iliopoulos (FI) terms in supergravity, keeping the formalism at a minumum and making use of explicit examples. We explain why, if the U(1) vector is massive everywhere in field space, FI terms are not genuine and can always be redefined away or introduced when they are not present.
arxiv +1 more source
CIRCULO de linguistica aplicada a la comunicacionEl presente trabajo de investigación surge del interés por conocer las diferencias culturales que existen en las prácticas de citación en el género académico del Trabajo de Fin de Máster de los escritores españoles nativos (Ee), filipinos no nativos de ...
David Sánchez-Jiménez
semanticscholar +1 more source
Bol. Soc. Mex. F\'{i}s. 33, 1 (2019), 2020 We present a brief introduction to the topological phases of matter.
arxiv
The cosmological constant in Supergravity [PDF]
, 2018 We propose a supersymmetrisation of the cosmological constant in ordinary $N=1$ supergravity that breaks supersymmetry spontaneously by a constant Fayet-Iliopoulos (FI) term associated to a $U(1)$ symmetry. This term is a variation of a new gauge invariant FI term proposed recently, which is invariant under K\"{a}hler transformations and can be written
arxiv +1 more source
Spectrum graph coloring to improve Wi-Fi channel assignment in a real-world scenario via edge contraction [PDF]
Discrete Applied Mathematics 263 (2019), 234-243, 2018 The present work deals with the problem of efficiently assigning Wi-Fi channels in a real-world scenario, the Polytechnic School of the University of Alcal\'a. We first use proximity graphs to model the whole problem as an instance of spectrum graph coloring, we further obtain a simplified model using edge contraction, and we finally use simulated ...
arxiv +1 more source
Visualització 3D i docència en ciències experimentals: Aplicació sobre els ensenyaments de la Facultat de Geologia de la UB [PDF]
, 2015 Aquest projecte va ser plantejat considerant útils per al treball docent i la seva millora les noves eines de visualització tridimensional (tant en 2D, en pantalla convencional, com en 3D en monitors adaptats per la visualització amb ulleres ...
Cabello López, Patricia +7 more
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Quantum estimation in an expanding spacetime [PDF]
Ann. Phys. 397, 336 (2018), 2018 We investigate the quantum estimation on the Hubble parameter of an expanding de Sitter space by quantum metrological techniques. By exploring the dynamics of a freely falling Unruh-DeWitt detector, which interacts with a scalar field coupling to curvature, we calculate the Fisher information (FI) and quantum Fisher information (QFI) for the detector ...
arxiv +1 more source
Memòria final d'actuacions de l'equip deganal (2012-2016) [PDF]
, 2015 La darrera Junta de Facultat d’aquest mandat deganal (març de 2012 a 2016) és el moment adequat per fer balanç i retre comptes de la gestió dels darrers quatre anys.
Universitat de Barcelona. Facultat de Dret
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