Exploració per tema "Propagation"
Ara es mostren els items 1-19 de 19
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Analysis of the ground vibration generated by debris flows and other torrential processes at the Rebaixader monitoring site (Central Pyrenees, Spain)
(2014-01-01)
Article
Accés obertMonitoring of debris flows using ground vibration sensors has increased in the last two decades. However, the correct interpretation of the signals still presents ambiguity. In the Rebaixader monitoring site (Central ... -
Definitions and concepts for quantitative rockfall hazard and risk analysis
(2021-04)
Article
Accés obertThere is an increasing need for quantitative rockfall hazard and risk assessment that requires a precise definition of the terms and concepts used for this particular type of landslide. This paper suggests using terms that ... -
Development of a prototype for submarine communications in shallow waters
(SARTI, 2016)
Comunicació de congrés
Accés obertThe Telecommunications Marine Laboratory (TML) of the University of Cádiz takes part in a research project to study the intertidal sediments of the Bay of Cádiz. The collection of samples from the seabed and the transmission ... -
Directive mmWave radio channel modeling in a ship hull
(Cambridge University Press, 2021)
Article
Accés obertWireless connectivity has been realized for multiple environments and different frequency bands. However, little research exists about mmWave communication in industrial environments. This paper presents the 60 GHz ... -
Government interventions and control policies to contain the first COVID-19 outbreak: An analysis of evidence
(2023-07)
Article
Accés obertBackground: The overarching aim of this study was to evaluate the effectiveness over time of government interventions and policy restrictions and the impact of determinants on spread and mortality during the first-wave ... -
Initial orbit determination and satellite tracking using optical observations
(Universitat Politècnica de Catalunya, 2021-07-15)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autor
Realitzat a/amb: Xīběi Gōngyè DàxuéThe objective of this project is to propose a passive method for orbit determination (OD) of GEO objects using observational data as position measurements. The proposed method use position measurements expressed as right ... -
L-band vegetation optical depth estimation using transmitted GNSS signals: Application to GNSS-reflectometry and positioning
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-08-01)
Article
Accés obertAt L-band (1–2 GHz), and particularly in microwave radiometry (1.413 GHz), vegetation has been traditionally modeled with the τ-ω model. This model has also been used to compensate for vegetation effects in Global Navigation ... -
mmWave propagation within a computing package
(Universitat Politècnica de Catalunya, 2017-10-20)
Treball Final de Grau
Accés obertWireless Network-on-Chip (WNoC) appears as a promising alternative to conventional interconnect fabrics as current chip multiprocessors are scaled. There have been plenty of works analyzing the WNoC paradigm from the ... -
Nondiffractive-nondiffusive beams in complex crystals
(2014-06-16)
Article
Accés obertThe study of spatial dispersion of two-dimensional complex crystals, with periodic modulations of both gain-loss and the refractive index, reveals simultaneous nondiffractive-nondiffusive light propagation. Narrow light ... -
Nonlinear duffing oscillator model for third harmonic generation
(2015-10-01)
Article
Accés obertWe employ a classical, nonlinear Lorentz-Duffing oscillator model to predict third harmonic conversion efficiencies in the ultrafast regime, from a variety of metal nanostructures, including smooth, isolated metal layers, ... -
Numerical modeling of crack propagation using zero-thickness interfaces elements and configurational mechanics
(International Association of Fracture Mechanics for Concrete and Concrete Structures, 2019)
Text en actes de congrés
Accés restringit per política de l'editorialThe prediction of crack trajectories is one of the major challenges of existing numerical methods for the mechanical behavior of concrete and other quasi-brittle materials. For this purpose, this paper describes a methodology ... -
Over-limiting currents and deionization “shocks” in current-induced polarization: Local-equilibrium analysis
(2012-11-15)
Article
Accés restringit per política de l'editorialThe problem is considered theoretically of dynamics of current-induced concentration polarization of interfaces between ideally perm-selective and non-ideally perm-selective (“leaky”) ion-exchange media in binary electrolyte ... -
Precise orbit determination for geostationary bistatic radar imaging
(Universitat Politècnica de Catalunya, 2017-06)
Treball Final de Grau
Accés restringit per acord de confidencialitat -
Self-deflecting plasmonic lattice solitons and surface modes in chirped plasmonic arrays
(2015-03-15)
Article
Accés restringit per política de l'editorialWe show that chirped metal-dielectric waveguide arrays with focusing cubic nonlinearity can support plasmonic lattice solitons that undergo self-deflection in the transverse plane. Such lattice solitons are deeply subwavelength ... -
Simulating atmospheric turbulence: Code development and educational applications
(Universitat Politècnica de Catalunya, 2022-04-29)
Comunicació de congrés
Accés obertEarth atmosphere turbulence affects many areas of interest related with Space studies, such as optical communications or Astronomy. In fact, it is a key topic for such applications and, thus, it is important for students ... -
Stabilization of spatiotemporal solitons in Kerr media by dispersive coupling
(2015-03-15)
Article
Accés restringit per política de l'editorialWe introduce a mechanism to stabilize spatiotemporal solitons in Kerr nonlinear media, based on the dispersion of linear coupling between the field components forming the soliton states. Specifically, we consider solitons ... -
Study on beamforming V2I scenarios for sub-6 GHz and mmWave channels
(Institute of Electrical and Electronics Engineers (IEEE), 2020)
Text en actes de congrés
Accés obertThe study of the wireless channel between a hybrid massive MIMO Base Station (BS) and a vehicular platform is proposed. Several multi-antenna geometries and MIMO architectures in both vehicle and BS are numerically modeled ... -
Validation of the JPL multipath fading model using measurements from the lunar reconnaissance orbiter
(Universitat Politècnica de Catalunya, 2022-07)
Treball Final de Grau
Accés restringit per decisió de l'autorNASA JPL ha dissenyat un nou model numèric determinístic de propagació per carac- teritzar el canal entre un transmissor a la Lluna i un receptor a la Terra. En concret, el transmissor pot ser un rover o una estació base ... -
Wave propagation patterns along the southern Catalan coast
(Universitat Politècnica de Catalunya, 2017-06)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorThe estimation of the wave field near the coast using the measurements done in deep waters is one of the basic tools for the studies carried out in the marine environment, which usually take the wave height as the main ...