Search results for "intercept"

Effects of canopy covering on yield and quality of ‘Nero d’Avola’ (Vitis vinifera L.) grown in hot-arid climate condition

The impact of climate change on grapevine ecophysiology and vineyard management is predicted to be a serious problem in the next years. In fact, it has an influence on the fruit-set, yield, and in modulating decoupling between technological and phenolic ripening. Thus, it is essential to identify costeffective and easy-to-implement solutions to deal with the issue. For this purpose, the present study aims to test different shade treatments (ST) applied directly to the canopy of ′Nero d’Avola′ cultivar (Vitis vinifera L.), trying to limit the excess of light and heat that, usually occur in hot-arid climate areas as in Sicily. Two ST were imposed during the 2020 vegetative season from fruit s…

Premorbid social adjustment is better in cannabis-using than non-using psychotic patients across Europe

2016

IntroductionA number of authors have hypothesized that psychotic patients who consume cannabis constitute a differentiated subgroup of patients that have better cognitive and social skills, necessary to engage in illegal drug consumption, than non-using patients.ObjectivesGiven that the prevalence, and patterns, of cannabis use are culturally driven, we wanted to study first-episode psychosis (FEP) cannabis-using and non-using patients coming from different European countries as part of the EUGEI-STUDY.AimsWe tested the hypothesis of better premorbid social adjustment in cannabis-using FEP patients, by comparing them to FEP non cannabis users and to their respective healthy controls.Methods…

Méta-modélisation de l’interception de la lumière dans un couvert cultures: adventices

2017

EAGESTAD DOCT INRA; Dans le modèle parcelle virtuelle de dynamique de la flore adventice, FLORSYS, 70% du temps de calcul est utilisé par le module 3D d’interception de la lumière dont dépend la compétition des cultures et des adventices pour la lumière et la croissance des plantes. Afin d’accélérer le calcul, nous avons utilisé une méthode pour méta-modéliser le module. Cette méthode permet aussi réaliser une analyse de sensibilité. La hauteur et la largeur des plantes ont été identifiées comme des variables primordiales pour prédire l’interception de la lumière par le couvert.

Reciprocal Relations between Adolescents’ Self-Concepts of Ability and Achievement Emotions in Mathematics and Literacy

2021

This longitudinal study examined cross-lagged relations of self-concepts of ability and achievement emotions (i.e., enjoyment, boredom, anxiety) in two central school subjects (i.e., mathematics and literacy). Adolescents (N = 848) reported their achievement emotions and self-concepts of ability four times during Grades 6 and 7. The pattern of results was different for mathematics and literacy subjects. For mathematics the results of random intercept cross-lagged panel models showed a positive reciprocal relationship between self-concepts of ability and enjoyment and a negative reciprocal relationship between self-concept and anxiety. Lower self-concepts of ability in mathematics also predi…

Reciprocal Relationships Between Perceived Supportive School Climate and Self-reported Truancy : A Longitudinal Study from Grade 6 to Grade 9

2022

This longitudinal study of 1,066 Finnish students examined bidirectional reciprocal relationships between changes in perceived supportive school climate and changes in self-reported truancy from the last year of primary school (Grade 6) to the last year of lower secondary school (Grade 9). The results of the random intercept cross-lagged panel model showed, first, that a decrease in positive perceptions of school climate at the previous time point predicted more self-reported truancy at the following time point. Second, an increase in self-reported truancy predicted less positive perceptions of supportive school climate. The study indicates that students’ perceptions of supportive school cl…