Enviament des de DRAC
Recent Submissions
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Intel·ligència artificial
(1990)
External research report
Open AccessBreu descripció, de caire introductori, de la història, mètodes i objectius de la Intel·ligència Artificial (IA), amb un balanç de la seva situació als darrers anys 80 --en un moment de crisi (o de replanteig)-- i un esbós ... -
Kolmogorov complexity of #P functions
(1991-01)
External research report
Open AccessAre the outputs of #P functions "random"? We way phrase this question more precisely: are there #P functions whose outputs cannot in general be compressed into a string of small length, and recovered quickly from that ... -
Reutilización de espacios industriales anónimos en el barrio del Poblenou
(2020-05-04)
Article
Open AccessEsta propuesta de reutilización de una serie de cinco naves industriales, en el sector del Poblenou de Barcelona, pretende —y consigue— aprovechar lo existente no como un obstáculo sino como una oportunidad de mejorar ... -
Analysis and prediction of COVID-19 for EU-EFTA-UK and other countries
(2020-07-29)
External research report
Open AccessThe present report aims to provide a comprehensive picture of the pandemic situation of COVID-19 in the EU countries, and to be able to foresee the situation in the next coming days. We employ an empirical model, verified ... -
A compact fission detector for fission-tagging neutron capture experiments with radioactive fissile isotopes
(2020-04-21)
Article
Open AccessIn the measurement of neutron capture cross-sections of fissile isotopes, the fission channel is a source of background which can be removed efficiently using the so-called fission-tagging or fission-veto technique. For ... -
Investigation of the 240Pu (n, f) reaction at the n_TOF/EAR2 facility in the 9 meV–6 MeV range
(American Physical Society (APS), 2020-07-21)
Article
Open AccessBackground: Nuclear waste management is considered amongst the major challenges in the field of nuclear energy. A possible means of addressing this issue is waste transmutation in advanced nuclear systems, whose operation ... -
Finite element modeling of temperature fields on the cutting edge in the dry high-speed turning of aisi 1045 steel
(2020-08)
Article
Open AccessHigh-speed turning is an advanced and emerging machining technique that, in contrast to the conventional machining, allows the manufacture of the workpiece with high accuracy, efficiency and quality, with lower production ... -
Orchard spray study: a prediction model of droplet deposition states on leaf surfaces
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-05-01)
Article
Open AccessDuring air-assisted spraying operations in orchards, the interaction between the droplets and the target leaves has a decisive influence on the retention of the droplets on the leaves and the final deposition state. Based ... -
Characterizations of some complexity classes between [theta sub 2 super p] and [delta sub 2 super p]
(1990)
External research report
Open AccessWe give some characterizations of the classes P super NP [0(log super k n)]. First, we show that these classes are equal to classes AC super k-1 (N P). Second, we prove that they are also equivalent to some classes defined ... -
Generalized Kolmogorov complexity in relativized separations
(1990-04)
External research report
Open AccessWe describe several developments of a technique, due to Hartmanis, that uses Kolmogorov complexity to prove the existence of relativizations separating complexity classes. The main advantage of these proofs is that they ... -
Superfluid and supersolid phases of He-4 on the second layer of graphite
(American Institute of Physics (AIP), 2020-05-22)
Article
Open AccessWe revisited the phase diagram of the second layer of 4He on top of graphite using quantum Monte Carlo methods. Our aim was to explore the existence of the novel phases suggested recently in experimental works, and determine ... -
Finite-range effects in ultradilute quantum drops
(2020-05-27)
Article
Open AccessIn the first experimental realization of dilute Bose–Bose liquid drops using two hyperfine states of 39K some discrepancies between theory and experiment were observed. The standard analysis of the data using the Lee–Huang–Yang ...
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