Search results for "LONG"

New frontiers in ageing and longevity: Sex and gender medicine

2023

APO E allelic variants in healthy elderly people

2010

A new methodology to estimate deformation of longitudinal safety barriers

2013

The correct sizing of storage areas in the port areas is aimed to optimizing the management of intermodal transport and to ensure efficiency and functionality to the entire port system. In this paper is proposed a simulation model for design the port storage areas taking into account many parameters like: the service time, the randomness of the arrivals process, the storage capacity in terms of TEU that can be stored (and handled) in the unit of time. The capacity of the terminal warehouse is determined by the interrelation between fixed and static parameters in the short period which are: i) the extension of the storage area; ii) the height of the overlapping batteries of container (define…

Understanding the gender gap in STEM careers. A longitudinal data analysis

2019

Este trabajo presenta la aplicación de un análisis longitudinal a los datos del porcentaje de mujeres matriculadas en estudios relacionados con las disciplinas CTIM (STEM, por sus siglas en inglés) en la Escuela Técnica Superior de Ingeniería de la Universitat de València. El objetivo es evaluar el posible impacto del programa desarrollado desde 2011 en esta entidad para promocionar los estudios relacionados con la Ingeniería, especialmente entre las chicas.

Estimating the Bayesian posterior distribution of indirect effects in causal longitudinal mediation analysis

Many research studies aim to unveil the causal mechanism underlying a particular phenomenon; mediation analysis is increasingly used for this scope, and longitudinal data are particularly suited for mediation since they ensure the correct temporal order among variables and the time spanning allows the causal effects to unfold. This explains the rise of interest in the topic of longitudinal mediation analysis. Many approaches have been proposed to cope with longitudinal mediation (Fosen et al., 2005; Lin et al., 2017), among which mixed-effect modelling. In a recent paper, Bind et al. (Biostatistics, 2016) made use of generalised mixed effect models and provided conditions for the identifiab…

Combining Sequence Analysis and Hidden Markov Models in the Analysis of Complex Life Sequence Data

2018

Life course data often consists of multiple parallel sequences, one for each life domain of interest. Multichannel sequence analysis has been used for computing pairwise dissimilarities and finding clusters in this type of multichannel (or multidimensional) sequence data. Describing and visualizing such data is, however, often challenging. We propose an approach for compressing, interpreting, and visualizing the information within multichannel sequences by finding (1) groups of similar trajectories and (2) similar phases within trajectories belonging to the same group. For these tasks we combine multichannel sequence analysis and hidden Markov modelling. We illustrate this approach with an …

Bayesian causal mediation analysis through linear mixed-effect models

2022

In mediational settings, the main focus is on the estimation of the indirect effect of an exposure on an outcome through a third variable called mediator. The traditional maximum likelihood estimation method presents several problems in the estimation of the standard error and the confidence interval of the indirect effect. In this paper, we propose a Bayesian approach to obtain the posterior distribution of the indirect effect through MCMC, in the context of mediational mixed models for longitudinal data. A simulation study shows that our method outperforms the traditional maximum likelihood approach in terms of bias and coverage rates.

The Aprender a Convivir Intervention Program: Development of Social Competence and Behavioral Problems in Preschool Aged Children

2014

Latent growth curve model e simplex model: un’applicazione allo studio del programma di intervento aprender a convivir

2014

MEASURING LONGITUDINAL POVERTY

2009

Traditional measures of poverty persistence, such as “poverty rate” or the “persistent-risk-of-poverty rate”, do not devote enough attention to the sequence of poverty spells. In particular, they do not put enough attention in underlining the different effects associated with occasional single spells of poverty and the consecutive years of poverty. In this paper we propose a new index which measures the severity of poverty in a longitudinal view, taking into account the way poverty and non-poverty spells follow one another along individual life courses. The index is normalized and increases with the number of consecutive years in poverty along the individual poverty profile. The index is su…