1,109 research outputs found
Cine y otredad en ELT: Educar a través de las voces silenciadas de Billy Elliot
En este artículo exploramos un área altamente productiva y enriquecedora dentro de la didáctica de la Lengua Inglesa. Se trata del potencial del cine para el desarrollo de la transversalidad en el aula de idiomas así como para el aprendizaje de la lengua inglesa a nivel lingüístico. También ofrecemos unas referencias teóricas sobre la transversalidad y el concepto de Otredad para encuadrar nuestra propuesta didáctica. Finalmente, realizamos una propuesta de análisis y actuación sobre aspectos de otredad, identidad o género que creemos muy beneficiosos para explotar con la película Billy Elliot en contextos de English Language Teaching
Stock control analytics: a data-driven approach to compute the fill rate considering undershoots
[EN] One of the most frequently used inventory policies is the order-point, order-up-to-level (s, S) system. In this system, the inventory is continuously reviewed and a replenishment request is placed whenever the inventory position drops to or below the order point, s. The variable replenishment order quantity and the variable replenishment cycle characterize the system by the use of complex mathematical computations. Different methodological approaches diminish the mathematical complexity by neglecting the undershoots, i.e., the quantity that the inventory position is below the order point when it is reached. In this paper, we conceptually and empirically analyse the bias that neglecting the undershoots introduces into the estimation of the fill rate. After that, we suggest a new methodology developed under a data-driven perspective that uses a state-dependent parameter algorithm to correct such a bias. As a result, we propose two new methods, one parametric and the other nonparametric, to enhance the fill rate estimate. Both methods, named analytics fill rate methods, remove the bias that neglecting the undershoots introduces and are used to illustrate the practical implications of this hypothesis on the performance and design of the (s, S) system. This research is developed in a lost sales context with simulated stochastic and i.i.d. discrete demands as well as actual sales data.Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This work was supported by the European Regional Development Fund and Junta de Comunidades de Castilla-La Mancha (JCCM/FEDER, UE) under the project with reference SBPLY/19/180501/000151 and by the Vicerrectorado de Investigacion y Politica Cientifica from UCLM through the research group fund program (PREDILAB; [2021-GRIN-31210]). Funding for open access charge: CRUE-Universitat Politecnica de Valencia.Babiloni, E.; Guijarro, E.; Trapero, JR. (2023). Stock control analytics: a data-driven approach to compute the fill rate considering undershoots. Operational Research. 23(1):23-18. https://doi.org/10.1007/s12351-023-00748-y231823
Relation between quantum advantage in supervised learning and quantum computational advantage
The widespread use of machine learning has raised the question of quantum
supremacy for supervised learning as compared to quantum computational
advantage. In fact, a recent work shows that computational and learning
advantage are, in general, not equivalent, i.e., the additional information
provided by a training set can reduce the hardness of some problems. This paper
investigates under which conditions they are found to be equivalent or, at
least, highly related. The existence of efficient algorithms to generate
training sets emerges as the cornerstone of such conditions. These results are
applied to prove that there is a quantum speed-up for some learning tasks based
on the prime factorization problem, assuming the classical intractability of
this problem
Esto es una sonata: la intermedialidad musical en la novela y en sus paratextos fuertes
This paper aims to explain the role that paratexts play in novels –and literary works in general– that imitate or reproduce musical patterns, supporting the thesis that they are often decisive for generating a musical reading of a text. A body of works from Spanish and Latin American fiction seldom explored from this perspective and the conceptual frame developed by Wolf or Petermann constitute the basis for an explanation of the various meanings that titles may acquire. Special attention is paid to the issue of how to understand generic titles as “sonata”, “symphony” or “fugue” when they point out to a musical dimension that is otherwise difficult to justify. Also, it is proposed a distinction between paratexts with a weak or a strong deontic power, as well as the idea that without some kind of thematisation, there is not musical imitation.Este artículo propone una explicación del papel de los paratextos en las novelas que imitan o reproducen patrones musicales, defendiendo la tesis de que a menudo son clave para generar una dimensión musical en la obra. Recurriendo a un corpus español e hispanoamericano rara vez estudiado desde esta perspectiva, se aplica el marco conceptual que autores como Wolf o Petermann han desarrollado en el ámbito de los estudios intermediales para explicar los distintos sentidos que pueden adquirir los títulos remáticos musicales, y se presta especial atención a un problema habitualmente relegado: cómo interpretar estos títulos cuando apuntan a una condición musical que difícilmente halla justificación en el texto. Asimismo, esta argumentación conduce a proponer una distinción entre paratextos con poder deóntico fuerte y débil, y a defender la idea de que sin tematización, no hay imitación musical
Diamond vs. square mesh codend in a multi-species trawl fishery of the western Mediterranean: effects on catch composition, yield, size selectivity and discards
Selectivity studies usually describe the effects on target species, whereas information on by-catch and discards is scarce. Nevertheless, large quantities of undersized individuals and invertebrates are discarded in the Mediterranean multi-species bottom trawl fishery. The present work analyses the data from two surveys carried out on the shallow and deep continental shelf (50–78 m, and 147–189 m, respectively) off the Balearic Islands (western Mediterranean). In these surveys, the traditionally used 40 mm diamond mesh codend and an experimental square mesh codend were used under commercial conditions. Catch composition, yields, size selectivity of both target and by-catch species, and discards were compared between the two mesh types. The mean selection length (L50) clearly increased for most species when using square mesh, escaping many more individuals under their minimum landing size. Yield of Spicara smaris was significantly lower by using the square mesh, changing the composition of the retained catch. Escapement ratio and economic loss were significantly higher with square mesh, although economic loss was almost negligible for both meshes on the deep continental shelf. The use of square mesh significantly reduced the discards of algae in the shallow waters and fish on the deep continental shelf. The results confirmed that square mesh codend reduces the fishing pressure on small specimens as well as the impact of trawling on the ecosystem. These benefits would not lead to a reduction of the yields neither of the main target species, the fishes Merluccius merluccius, Mullus surmuletus, Zeus faber, and the cephalopods Loligo vulgaris and Octopus vulgaris, nor of the rest of commercial categories, except for Spicara smarisPublicado
Daily rainfall variability in the Spanish Mediterranean area
Ponencias presentadas en: 2nd European Conference on Applied Climatology (ECAC) celebrada en Viena del 19 al 23 de octubre de 2018
Sequencing of folding events in Go-like proteins
We have studied folding mechanisms of three small globular proteins: crambin
(CRN), chymotrypsin inhibitor 2 (CI2) and the fyn Src Homology 3 domain (SH3)
which are modelled by a Go-like Hamiltonian with the Lennard-Jones
interactions. It is shown that folding is dominated by a well-defined
sequencing of events as determined by establishment of particular contacts. The
order of events depends primarily on the geometry of the native state.
Variations in temperature, coupling strengths and viscosity affect the
sequencing scenarios to a rather small extent. The sequencing is strongly
correlated with the distance of the contacting aminoacids along the sequence.
Thus -helices get established first. Crambin is found to behave like a
single-route folder, whereas in CI2 and SH3 the folding trajectories are more
diversified. The folding scenarios for CI2 and SH3 are consistent with
experimental studies of their transition states.Comment: REVTeX, 12 pages, 11 EPS figures, J. Chem. Phys (in press
Advances in the homogenization of daily peak wind gusts: an application to the Australian series
Póster presentado en: EGU General Assembly 2018 celebrada del 8 al 13 de abril en Viena, Austria.Daily Peak Wind Gusts (DPWG) time-series are valuable data for evaluation of wind related hazard risk to the population and different economic sectors. Yet wind time-series are prone to be affected by inhomogeneities temporally and spatially (e.g. through change of instruments at a site compared to surrounding sites) that may mislead the studies of their variability and trends. The aim of this work is to present the advances in the homogenization of DPWG by analyzing 548 sites time-series across Australia covering the 1941-2016 time period. Due to the low correlation coefficients between these series, especially in the first decades when the station density is much lower, the average wind speed data from the NCEP/NCAR reanalysis were tried as reference series. However, their lower correlations with the DPWG data suggests avoiding this approach. We proposed a robust monthly homogenization using the R package Climatol, which detected 353 break-points at the monthly scale. Some of them were supported by the history of the stations, but detailed analysis of the metadata of 35 selected stations did not find a good correspondence since many changes do not necessarily produce inhomogeneities. When NCEP/NCAR reanalysis are used as references, more break-points are detected around 2003, but it is not clear whether they are due to a general change of the DPWG algorithm in the observation network or rather an artifact due to inhomogeneities in the reanalysis series. The monthly dates of the detected break-points were used in a new application of the Climatol package to adjust the series at daily basis, yielding a homogenized and filled DPWG database for assessing the variability of extreme wind events. Resultant trends of the homogenized DPWG series showed the benefits of the homogenization in the form a much lower dispersion of their values.This work has been also supported by the Project “Detection and attribution of changes in extreme wind gusts ove rland” (2017-03780) funded by the Swedish Research Council, and the MULTITEST (Multiple verification of automatic software homogenizing monthly temperatura and precipitation series; CGL2014-52901-P) Project ,funded b ythe Spanish Ministry of Economy and Competitivity
Contribution of uneven warming to the observed wind stilling in North China for 1961-2016
This work has been supported by the project “Detection and attribution of changes in extreme wind gusts over land” (2017-03780) funded by the Swedish Research Council
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