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Speckle reduction in double-pass retinal images
(Nature, 2019-03-14)
Article
Open Access -
All-solid-state VUV frequency comb at 160 nm using high-harmonic generation in nonlinear femtosecond enhancement cavity
(2019-02-21)
Article
Open AccessWe realized a solid-state-based vacuum ultraviolet frequency comb by harmonics generation in an external enhancement cavity. Optical conversions were so far reported by only using gaseous media. We present a theory that ... -
Quantifying the degree of locking in weakly forced stochastic systems
(American Institute of Physics (AIP), 2019-02-12)
Article
Open AccessControlling an stochastic nonlinear system with a small amplitude signal is a fundamental problem with many practical applications. Quantifying locking is challenging, and current methods, such as spectral or correlation ... -
Unsupervised feature extraction of anterior chamber OCT images for ordering and classification
(Nature, 2019-02-04)
Article
Open AccessWe propose an image processing method for ordering anterior chamber optical coherence tomography (OCT) images in a fully unsupervised manner. The method consists of three steps: Firstly we preprocess the images (filtering ... -
Laser Ultrasound Inspection Based on Wavelet Transform and Data Clustering for Defect Estimation in Metallic Samples
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-01-30)
Article
Open AccessLaser-generated ultrasound is a modern non-destructive testing technique. It has been investigated over recent years as an alternative to classical ultrasonic methods, mainly in industrial maintenance and quality control ... -
Impact of lag information on network inference
(Springer, 2018-11-01)
Article
Restricted access - publisher's policyExtracting useful information from data is a fundamental challenge across disciplines as diverse as climate, neuroscience, genetics, and ecology. In the era of “big data,” data is ubiquitous, but appropriate methods are ... -
Random delays and the synchronization of chaotic maps
(American Institute of Physics (AIP), 2005-04)
Article
Restricted access - publisher's policyWe investigate the dynamics of an array of chaotic logistic maps coupled with random delay times. We report that for adequate coupling strength the array is able to synchronize, in spite of the random delays. Specifically, ... -
Directional invisibility by genetic optimization
(2018-11-26)
Article
Open AccessIn this Letter, the design of a directional optical cloaking by a genetic algorithm is proposed and realized experimentally. A three-dimensional finite-difference time-domain method is combined with the genetic optimization ... -
Asymmetric light transmission effect based on an evolutionary optimized semi-Dirac cone dispersion photonic structure
(American Physical Society (APS), 2018-12-10)
Article
Open AccessIn this paper, we present the numerical and experimental demonstration of asymmetric light transmission by a compact photonic crystal (PC) structure, which sustains semi-Dirac cone dispersion. The semi-Dirac point is ... -
Estimation of the motion-induced horizontal-wind-speed standard deviation in an offshore doppler lidar
(Multidisciplinary Digital Publishing Institute (MDPI), 2018-12-14)
Article
Open AccessThis work presents a new methodology to estimate the motion-induced standard deviation and related turbulence intensity on the retrieved horizontal wind speed by means of the velocity-azimuth-display algorithm applied to ... -
Near surface geophysical analysis of the Navamuño depression (Sierra de Béjar, Iberian Central System): geometry, sedimentary infill and genetic implications of tectonic and glacial footprint
(2018-08-15)
Article
Restricted access - publisher's policyThe geometric and genetic characterization of the Navamuño depression peatland system (Iberian Central System) is presented here using results from a geophysical survey. This depression is a ~30¿ha pseudo-endorheic flat ... -
Nonlinear oscillatory mixing in the generalized Landau scenario
(American Institute of Physics (AIP), 2018-05-31)
Article
Open AccessWe present a set of phase-space portraits illustrating the extraordinary oscillatory possibilities of the dynamical systems through the so-called generalized Landau scenario. In its simplest form the scenario develops in ...
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