Search results for "FOS"
showing 10 items of 15075 documents
Visualización del contenido de grafos de conocimiento del patrimonio cultural
2022
Esta tesis integra dos áreas científicas, la de las Ciencias Humanas y la de Ciencia y Tecnología. Dentro de las Ciencias Humanas está relacionada con la semantización y visualización de la información de datos del Patrimonio. En cuanto a la Ciencia y Tecnología, este trabajo está relacionado con grafos de conocimiento, diseño de ontologías y la visualización interactiva en tiempo real de datos en dos y tres dimensiones, mediante plataformas web. Tal y como se expone en esta tesis, en la última década ha crecido enormemente la digitalización de los objetos del patrimonio cultural. Este proceso, no se refiere únicamente a digitalizar mediante imágenes, reconocimiento de texto, o modelos 3D, …
Acoustic wave tunneling across a vacuum gap between two piezoelectric crystals with arbitrary symmetry and orientation
2022
It is not widely appreciated that an acoustic wave can “jump” or “tunnel” across a vacuum gap between two piezoelectric solids, nor has the general case been formulated or studied in detail. Here, we remedy that situation, by presenting a general formalism and approach to study such an acoustic tunneling effect between two arbitrarily oriented anisotropic piezoelectric semi-infinite crystals. The approach allows one to solve for the reflection and transmission coefficients of all the partial-wave modes, and is amenable to practical numerical or even analytical implementation, as we demonstrate by a few chosen examples. The formalism can be used in the future for quantitative studies of the …
Tūrisma terminoloģijas morfosemantiskās vārdu veidošanās paņēmienu salīdzinošā analīze franču un latviešu valodā
2019
Šī pētījuma mērķis ir noteikt un salīdzināt morfosemantiskās vārdu veidošanās paņēmienus tūrisma terminos no franču un latviešu valodas tūrisma brošūrām. Pētījuma pirmajā daļā izstudēti terminoloģijas modeļi un nodefinēts termins. Šajā daļā mēs izceļam tūrismu kā specialitātes jomu, kurā apskatām tūrisma terminoloģijas raksturīgākās iezīmes, kā arī akcentējam morfosemantiskās vārdu veidošanās paņēmienus, kas tiek pielietoti terminu izveidē. Pētījuma otrā daļa ir veltīta tūrisma terminu morfosemantiskās vārdu veidošanās paņēmienu salīdzinošajai analīzei, kas tika atsegti no franču un latviešu valodas brošūrām. Tad tiek pētīts, kādi paņēmieni dominē un kādas ir to īpašības. Pētījuma rezultāti…
Few-body insights of multiquark exotic hadrons
2018
In this contribution we discuss the adequate treatment of the $4-$ and $5-$body dynamics within a constituent quark framework. We stress that the variational and Born-Oppenheimer approximations give energies rather close to the exact ones, while the diquark approximation might be rather misleading. Hall-Post inequalities provide very useful lower bounds that exclude possible stable states for some mass ratios and color wave functions.
Materiali per una crisi: teorema del serializzante nell’epoca della video-guerra civile
2015
Starting from a brief de-functionalizing analysis of the info-spectacular society, the essay explores the pervasiveness of the repressive-disciplining forms which are increasingly affecting the behaviors of the individualities in the info-spherical dominion. In particular, the paper focuses on what will be defined the “serializing” and highlights some repetitive-determinant aspects of the video-seriality that are involved in the processes of “over-codification” imposed by the infosphere on the anthropo-sphere. In order to define the serializing will be taken in exam both the possible evolutions of the Gelassenheit and the “dispositiviness” imposed by info-securitarian post- democracies thro…
Kinetics of phase separation in thin films: Lattice versus continuum models for solid binary mixtures
2008
A description of phase separation kinetics for solid binary (A,B) mixtures in thin film geometry based on the Kawasaki spin-exchange kinetic Ising model is presented in a discrete lattice molecular field formulation. It is shown that the model describes the interplay of wetting layer formation and lateral phase separation, which leads to a characteristic domain size $\ell(t)$ in the directions parallel to the confining walls that grows according to the Lifshitz-Slyozov $t^{1/3}$ law with time $t$ after the quench. Near the critical point of the model, the description is shown to be equivalent to the standard treatments based on Ginzburg-Landau models. Unlike the latter, the present treatmen…
Deformation Quantization in White Noise Analysis
2007
We define and present an example of a deformation quantization product on a Hida space of test functions endowed with a Wick product.
The Large Observatory For x-ray Timing
2014
The Large Observatory For x-ray Timing (LOFT) was studied within ESA M3 Cosmic Vision framework and participated in the final down-selection for a launch slot in 2022-2024. Thanks to the unprecedented combination of effective area and spectral resolution of its main instrument, LOFT will study the behaviour of matter under extreme conditions, such as the strong gravitational field in the innermost regions of accretion flows close to black holes and neutron stars, and the supra-nuclear densities in the interior of neutron stars. The science payload is based on a Large Area Detector (LAD, 10 m 2 effective area, 2-30 keV, 240 eV spectral resolution, 1 deg collimated field of view) and a WideFi…
Online ^{222}Rn removal by cryogenic distillation in the XENON100 experiment
2017
International audience; We describe the purification of xenon from traces of the radioactive noble gas radon using a cryogenic distillation column. The distillation column was integrated into the gas purification loop of the XENON100 detector for online radon removal. This enabled us to significantly reduce the constant$^{222}$ Rn background originating from radon emanation. After inserting an auxiliary$^{222}$ Rn emanation source in the gas loop, we determined a radon reduction factor of $R\,>\,27$ (95% C.L.) for the distillation column by monitoring the$^{222}$ Rn activity concentration inside the XENON100 detector.
The XENON1T Dark Matter Experiment
2017
The XENON1T experiment at the Laboratori Nazionali del Gran Sasso (LNGS) is the first WIMP dark matter detector operating with a liquid xenon target mass above the ton-scale. Out of its 3.2 t liquid xenon inventory, 2.0 t constitute the active target of the dual-phase time projection chamber. The scintillation and ionization signals from particle interactions are detected with low-background photomultipliers. This article describes the XENON1T instrument and its subsystems as well as strategies to achieve an unprecedented low background level. First results on the detector response and the performance of the subsystems are also presented. © 2017, The Author(s).