Search results for " Modeling"
showing 10 items of 2411 documents
A Reciprocal Effects Model of the Temporal Ordering of Coping and Defenses
2016
This study aimed to examine how coping and defenses are related over time, using a two-wave cross-lagged panel design. Coping and defenses were assessed before and after a sport competition in a sample of 296 competitive athletes. Partial least squares path modeling results showed that (a) pre-competitive mature defenses predicted increases in the use of task-oriented coping during competition; (b) pre-competitive immature defenses predicted an increase in the use of disengagement-oriented coping during competition; and (c) pre-competitive task-oriented coping predicted an increase in the use of immature defenses during competition. Overall, our findings suggest that defenses predict the us…
Emociones, estilos de afrontamiento y agresividad en la adolescencia
2012
Este estudio analiza la relación entre las estrategias de afrontamiento y las emociones para determinar en qué medida son procesos relacionados con la conducta agresiva. Se parte del supuesto de que en la agresividad influyen los mecanismos de afrontamiento en la resolución de problemas y el manejo de las emociones: inestabilidad emocional (falta de autocontrol ante situaciones que producen tensión) o empatía (sentimientos orientados al otro que tiene un problema o necesidad). Se ha evaluado una muestra de 1.557 niños y niñas, con un rango de edad entre 12 y 15 años, escolarizados en primer ciclo de Educación Secundaria Obligatoria (ESO) en 36 Centros escolares de la Comunidad Valenciana, s…
Psychometric properties of the Italian version of the Experience in Close Relationship Scale 12 (ECR-12): An exploratory structural equation modeling…
2019
The Experiences in Close Relationship Scale (ECR) is one of the most commonly used self-report instruments of adult attachment and has been widely adopted in psychotherapy research. Composed of two subscales, namely Attachment Avoidance and Anxiety, the ECR was recently shortened to a 12-items version, called the ECR-12. Given the importance of extending knowledge on its applicability in understudied populations, our aim was to validate the ECR-12 in a large sample of Italian native-speakers. A total of 1197 participants (73.2% females; mean age=28.53±11.37 years) completed the ECR-12. Each participant also completed other measures of attachment, psychopathology, interpersonal distress, cop…
Variation on the theme 'In Search of New Foundations for Corporate Finance and Corporate Governance'
2003
Our purpose is to explore an alternative way to give new foundations to the theory of corporate finance and governance. The definition we give of corporate finance considers capital-budgeting as central. The shortcomings of the contract theory of the firm result in proposing new foundations to corporate finance based on the knowledge-based theories of the firm. Lastly, we explore the consequences of these new foundations. It leads to give new explanations of the role of external equity financing, financial debt and especially of internal financing, and to re-examine the corporate governance and financial evaluation questions.
Convergence of Agents' and Targets' Reports on Intraorganizational Influence Attempts1
2003
Summary The object of the current study was to determine the convergent and discriminant validity of agents' and targets' reports on intraorganizational influence attempts with a structural equation model using latent state-trait analyses. To explain agent-target convergence, we linked the theory of formal organizations to Correspondent Inference Theory. Managers (agents) were asked to describe how they try to influence their boss, a coworker, and a subordinate. These targets also described how the agent tries to influence them. Both agents and targets rated four types of influence attempts twice within 2½ months, namely, rational persuasion, ingratiation, pressure, and upward appeals. In …
Model predictive control for continuous lactide ring‐opening polymerization processes
2020
International audience; Polylactic acid (PLA) is an attractive environment-friendly thermoplastic that is bio-sourced and biodegradable. PLA is industrially produced by the ring-opening polymerization of Lactide. This reaction is sensitive to drifts in the operating conditions and impurities in the raw materials that may affect the reaction rate as well as the polymer properties, which can be very costly in continuous processes. It is therefore crucial to employ a control strategy that allows recovering the nominal conditions and maintaining the desired properties and conversion level in case of drift. Three control strategies are discussed in this paper: Proportional-Integral controller (P…
Refined equivalent single layer formulations and finite elements for smart laminates free vibrations
2014
A family of 2D refined equivalent single layer models for multilayered and functionally graded smart magneto-electro-elastic plates is presented. They are based on variable kinematics and quasi-static behavior for the electromagnetic fields. First, the electromagnetic state of the plate is determined by solving the strong form of the electromagnetic governing equations coupled with the corresponding interface continuity conditions and external boundary conditions. The electromagnetic state is then condensed into the plate kinematics, whose governing equations can be written using the generalized principle of virtual displacements. The procedure identifies an effective elastic plate kinemati…
A fast BEM for the analysis of damaged structures with bonded piezoelectric sensors
2010
A fast boundary element method for the analysis of three-dimensional solids with cracks and adhesively bonded piezoelectric patches, used as strain sensors, is presented. The piezoelectric sensors, as well as the adhesive layer, are modeled using a 3D state-space finite element approach. The piezoelectric patch model is formulated taking into account the full electro-mechanical coupling and embodying the suitable boundary conditions and it is eventually expressed in terms of the interface variables, to allow a straightforward coupling with the underlying host structure, which is modeled through a 3D dual boundary element method, for accurate analysis of cracks. The technique is computationa…
Applying univariate vs. multivariate statistics to investigate therapeutic efficacy in (pre)clinical trials: A Monte Carlo simulation study on the ex…
2020
BackgroundSmall sample sizes combined with multiple correlated endpoints pose a major challenge in the statistical analysis of preclinical neurotrauma studies. The standard approach of applying univariate tests on individual response variables has the advantage of simplicity of interpretation, but it fails to account for the covariance/correlation in the data. In contrast, multivariate statistical techniques might more adequately capture the multi-dimensional pathophysiological pattern of neurotrauma and therefore provide increased sensitivity to detect treatment effects.ResultsWe systematically evaluated the performance of univariate ANOVA, Welch's ANOVA and linear mixed effects models ver…
Global and time-resolved monitoring of crop photosynthesis with chlorophyll fluorescence
2014
Guanter, Luis et al.