Search results for " longitudinal"
showing 10 items of 188 documents
La Stima dei Moduli Elastici delle Murature Secondo le Norme Tecniche: il Confronto con la Sperimentazione
2011
Nel presente lavoro viene proposto uno studio sperimentale per la caratterizzazione meccanica di diverse tipologie di muratura. Vengono in particolare valutati i moduli elastici longitudinali e tangenziali che come è noto condizionano la risposta di sistemi murari sotto carichi laterali. I valori sperimentali sono confrontati con quelli stimabili per mezzo dei modelli proposti dalle normative tecniche italiana (DM 14/01/2008) e europea (Eurocodice 6). Lo studio prende spunto dalla questio posta dalla norma americana (MSJC 2008) che, pur proponendo l’uso di tali modelli, riconosce la poca sperimentazione eseguita a supporto della loro validazione. La campagna sperimentale ha incluso prove di…
Segmented mixed models with random changepoints: a maximum likelihood approach with application to treatment for depression study
2014
We present a simple and effective iterative procedure to estimate segmented mixed models in a likelihood based framework. Random effects and covariates are allowed for each model parameter, including the changepoint. The method is practical and avoids the computational burdens related to estimation of nonlinear mixed effects models. A conventional linear mixed model with proper covariates that account for the changepoints is the key to our estimating algorithm. We illustrate the method via simulations and using data from a randomized clinical trial focused on change in depressive symptoms over time which characteristically show two separate phases of change.
Degree course change and student performance: a mixed-effect approach
2015
This paper focuses on students credits earning speed over time and its determinants, dealing with the huge percentage of students who do not take the degree within the legal duration in the Italian University System. A new indicator for the performance of the student career is proposed on real data, concerning the cohort of students enrolled at a Faculty of the University of Palermo (followed for 7 years). The new indicator highlights a typical zero-inflated distribution and suggests to investigate the effect of the degree course (DC) change on the student career. A mixed-effect model for overdispersed data is considered, with the aim of taking into account the individual variability as wel…
Les nouvelles ségrégations scolaires et professionnelles : XVIIIes journées d'étude sur les données longitudinales dans l'analyse du marché du travai…
2011
Relief (échanges du CEREQ), n°34, mai 2011, enligne sur http://www.cereq.fr/index.php/content/download/1971/22647/file/relief34.pdf; Ségrégations scolaires et professionnelles sont les deux thèmes des 18èmes Journées d'études sur les données longitudinales dans l'analyse du marché du travail. Quatre types de ségrégations font l'objet des communications et structurent cet ouvrage : les ségrégations spatiales ou sociales, celles liées à la segmentation du marché du travail et les ségrégations de genre.
Investigación internacional en marketing turístico: análisis de contenido sobre temas y metodologías
2008
Con los objetivos de (1) determinar los temas más recurrentes en la literatura de marketing turístico y su ámbito de aplicación, intentando identificar futuras líneas de investigación, y (2) analizar la orientación metodológica de los mismos, se realizó una investigación centrada en el análisis de contenido de 269 artículos de marketing turístico publicados en las principales revistas internacionales especializadas en el periodo 2004-2006. Los resultados obtenidos por tres jueces independientes destacan el papel central del comportamiento del turista, siendo las estrategias de marketing el segundo tema más estudiado. En cuanto al subsector, casi la mitad de los trabajos de marketing turísti…
Évaluation longitudinale de l'expérience pédagogique du lycée Galatasaray
2014
En ligne sur http://www.cereq.fr/index.php/content/download/11326/93292/file/Relief48.pdf; National audience; Depuis 1868, fonctionne à Istanbul le Lycée Galatasaray, établissement francophone public de prestige créé en partenariat entre la France et la Turquie. En 1992, un accord bilatéral franco-turc décide la création de l'Etablissement public intégré Galatasaray, de droit public turc et comprenant une école primaire, rattachée au lycée, le lycée et des unités d'études supérieures. L'une des originalités est le recrutement de l'école primaire par tirage au sort. Les élèves rejoignent, à la fin de leurs études primaires et de collège, les élèves entrés au lycée Galatasaray par un concours…
Treatment of Specific Types of Nystagmus
2007
■ The function of the ocular motor system is to hold images stable on the fovea. The vestibular system and the vestibulo-ocular reflex (VOR) also play an important role in this function. The VOR connects the peripheral vestibular endorgans – the semicircular canals and otoliths – with their appropriate pair of eye muscles via a three-neuronal arc.
Changes in Mental Health during the COVID-19 Pandemic among Representative Sample of Young Adults from Germany, Israel, Poland, and Slovenia: A Longi…
2022
The aim of this cross-national longitudinal study was to identify a change in mental health indicators: coronavirus-related post-traumatic stress disorder (PTSD), perceived stress, and fear of vaccination (FoVac). The first measurement (T1) took place in February 2021, and the second (T2) took place in May–June 2021. The sample consisted of 1723 participants across Germany, Israel, Poland, and Slovenia, between the age of 20 and 40 (M = 30.74, SD = 5.74). A paired-samples Student’s t-test was used for testing the differences between T1 and T2. A repeated measures two-way ANOVA was performed to examine changes over time (T) and across the countries (C). A significant although small decrease …
A cohort perspective of youth poverty in the United States
2014
The aim of this paper is to study the degree of poverty persistence of American young adults and its evolution. Using data from NLSY79 and NLSY97, respectively, we compared two cohorts followed along eight years (in the 1980s and in the 2000s) to asses which socio-economic characteristics preserve them to fall in chronic poverty or determine the duration and severity of this detrimental experience.
Alice au Pays des NEET : la traversée du miroir sur 20 ans
2018
International audience