Search results for "STIMA"

The size of juxtaluminal hypoechoic area in ultrasound images of asymptomatic carotid plaques predicts the occurrence of stroke

2013

Abstract OBJECTIVE: To test the hypothesis that the size of a juxtaluminal black (hypoechoic) area (JBA) in ultrasound images of asymptomatic carotid artery plaques predicts future ipsilateral ischemic stroke. METHODS: A JBA was defined as an area of pixels with a grayscale value 10 mm(2) (P 8 mm(2)) was still significant after adjusting for other plaque features known to be associated with increased risk, including stenosis, grayscale median, presence of discrete white areas without acoustic shadowing indicating neovascularization, plaque area, and history of contralateral TIA or stroke. Plaque area and grayscale median were not significant. Using the significant variables (stenosis, discr…

Low-frequency noise inδ13C andδ18O tree ring data: A case study ofPinus uncinatain the Spanish Pyrenees

2010

[1] Isotopic discrimination measurements in tree rings are becoming increasingly important estimators of past environmental change. Potential biases inherent to these parameters, including age trend and level offset are, however, not well understood. We here perform measurements on a new millennium-long data set of decadally resolved δ18O and δ13C discrimination from 25 high-elevation pine trees in the Spanish Pyrenees to investigate whether such low-frequency biases exist and how they alter the long-term behavior of derived time series. Alignment of the tree ring data by biological age reveals age trends over the first one to four centuries after germination. On average, isotope values cha…

A new hybrid procedure for the definition of seismic vulnerability in Mediterranean cross-border urban areas

2016

Assessment of seismic vulnerability of urban areas provides fundamental information for activities of planning and management of emergencies. The main difficulty encountered when extending vulnerability evaluations to urban contexts is the definition of a framework of assessment appropriate for the specific characteristics of the site and providing reliable results with a reasonable duration of surveys and post-processing of data. The paper proposes a new procedure merging different typologies of information recognized on the territories investigated and for this reason called “hybrid.” Knowledge of historical events influencing urban evolution and analysis of recurrent building technologie…

Evaluation and comparison of satellite precipitation estimates with reference to a local area in the Mediterranean Sea

2014

Precipitation measurement is a key activity for the analysis of storm processes as well as every hydrological process. Satellite retrieval systems, rain-gauge network and radar systems are complement to each other in terms of their coverage and capability of monitoring precipitation. Satellite rainfall estimates systems produce data with global coverage that can provide information in areas for which data from other sources are unavailable. Without referring to ground measurement, satellite-based estimates can be bias. Although some gauged adjusted satellite precipitation products are developed, an effective way of integrating multi-sources of precipitation information is still a challenge.…

Assessment of maize nitrogen uptake from PRISMA hyperspectral data through hybrid modelling

2022

How Much Money Do You Need to Feel Taller? Impact of Money on Perception of Body Height

2021

Body height is considered to be one of the most important reproductive signals. However, there are only a few publications on what influences the sense of whether we assess ourselves as tall or short. In the present contribution, the psychological impact of money on the evaluation of a person’s own height was tested. We performed two experimental studies in which the respondents had contact with different amounts of money and were asked to evaluate their body height with the use of a laser pointer. The first experiment (N = 61) showed that contact with money significantly increased subjective height evaluation, and the effect was independent of participants’ real body height. The second exp…

Autocorrelation Metrics to Estimate Soil Moisture Persistence From Satellite Time Series: Application to Semiarid Regions

2021

Satellite-derived soil moisture (SM) products have become an important information source for the study of land surface processes in hydrology and land monitoring. Characterizing and estimating soil memory and persistence from satellite observations is of paramount relevance, and has deep implications in ecology, water management, and climate modeling. In this work, we address the problem of SM persistence estimation from microwave sensors using several autocorrelation metrics that, unlike traditional approaches, build on accurate estimates of the autocorrelation function from nonuniformly sampled time series. We show how the choice of the autocorrelation estimator can have a dramatic impac…

Alternative Diagonality Criteria for SOBI

2015

Blind source separation (BSS) is a multivariate data analysis method, whose roots are in the signal processing community. BSS is applied in diverse fields, including, for example, brain imaging and economic time series analysis. In the BSS model there are interesting latent uncorrelated variables, and the aim is to estimate the latent variables from multiple linear combinations of them. In this article we assume that these variables are weakly stationary time series, and we consider estimation methods which are based on approximate joint diagonalization of autocovariance matrices. In the popular SOBI estimator, a set of matrices is most diagonal when the sum of squares of their diagonal ele…

Risk factors for being a victim of online grooming in adolescents

2020

The risk of child grooming has spread exponentially with the massive access of adolescents to social networks and the internet. The aim of the study was to examine the personal factors (body self-esteem and disinhibition) and erotic-sexual factors (sexual initiation strategies and erotic-pornographic sexting) that predict grooming. METHOD: The sample was comprised of 1,200 adolescents aged between 12 and 16 years (M = 14.54, SD = 1.17; 50.83% girls). A cross-sectional design with self-report data was used and structural equation modeling (SEM) with mediation analysis was performed. RESULTS: The results indicated two paths explaining child grooming: 1) physical attractiveness and disinhibiti…

Implementación y evaluación de la eficacia de un Programa de Educación Emocional en Adolescentes con diagnóstico de TDAH

2019

Las habilidades socioemocionales en jóvenes con diagnóstico de Trastorno por Déficit de Atención e Hiperactividad (TDAH) son esenciales en su desarrollo psicológico y bienestar personal. Sin embargo, a pesar del reconocimiento general de la necesidad de dotar a estos jóvenes de recursos y estrategias que no están ni atendidas ni contempladas en el currículo académico, son escasos los trabajos que muestren la validez de programas de educación emocional en este colectivo. El objetivo del trabajo fue triple: a) la adaptación e implementación de un programa de educación emocional (denominado INTEMO), b) la evaluación de su eficacia, y c) el análisis de la satisfacción con el programa de usuario…