Search results for "modeling"

On the collision property of chaotic iterations based post-treatments over cryptographic pseudorandom number generators

2018

International audience; There is not a proper mathematical definition of chaos, we have instead a quite big amount of definitions, each of one describes chaos in a more or less general context. Taking in account this, it is clear why it is hard to design an algorithm that produce random numbers, a kind of algorithm that could have plenty of concrete appliceautifat (anul)d bions. However we must use a finite state machine (e.g. a laptop) to produce such a sequence of random numbers, thus it is convenient, for obvious reasons, to redefine those aimed sequences as pseudorandom; also problems arise with floating point arithmetic if one wants to recover some real chaotic property (i.e. propertie…

Motivational Antecedents of Well-Being and Health Related Behaviors in Adolescents

2017

Abstract Grounded in the Achievement Goal Theory framework of motivation and optimal functioning, there were two objectives of this study: (a) to test a model hypothesizing links between personal theories of school achievement, indices of the quality of academic engagement, wellbeing, and health-related behaviors, and (b) to explore whether the hypothesized model was invariant across gender groups. A multisection questionnaire pack tapping the targeted variables was administered to 967 teenagers (475 boys and 492 girls) aged between 11 to 16 years old. Structural equation modeling analysis revealed that Task theory of achievement predicted positively satisfaction in school and negatively bo…

Using an integrated social cognition model to predict COVID‐19 preventive behaviours

2020

ObjectivesRates of novel coronavirus disease 2019 (COVID-19) infections have rapidly increased worldwide and reached pandemic proportions. A suite of preventive behaviours have been recommended to minimize risk of COVID-19 infection in the general population. The present study utilized an integrated social cognition model to explain COVID-19 preventive behaviours in a sample from the Iranian general population.DesignThe study adopted a three-wave prospective correlational design.MethodsMembers of the general public (N = 1,718, Mage = 33.34, SD = 15.77, male = 796, female = 922) agreed to participate in the study. Participants completed self-report measures of demographic characteristics, i…

The Relationship among Paternal and Maternal Psychological Control, Self-Esteem, and Indecisiveness across Adolescent Genders

2015

The purpose of this study was to examine the relationship among adolescents’ indecisiveness, adolescents’ self-esteem, and maternal and paternal psychological control by focusing on the differences in the relationship among these variables across adolescent genders. A total of 381 Italian adolescents (215 boys and 166 girls), aged from 13 to 17 years, completed self-report measures of parental psychological control, self-esteem and indecisiveness. Since previous studies have highlighted indirect relations between family characteristics and indecisiveness, structural equation modeling (SEM) methods were used for testing self-esteem as a possible mediator. In particular, a multiple group anal…

Warr's scale of job-related affective well-being: A longitudinal examination of its structure and relationship with work characteristics

2007

Abstract The aims of this 3-year follow-up study among Finnish managers (n=615) were first, to test the theoretically-based structure of the job-related affective well-being scale (Warr, 1990b), and second, to examine the linear and curvilinear longitudinal associations between work characteristics and job-related affective well-being. Confirmatory factor analysis showed that the hypothesized four-factor model best described the structure of the job-related affective well-being scale; that is, the scale included four interrelated factors of job-related anxiety, comfort, depression, and enthusiasm at both measurement times. Structural equation modelling showed that high feelings of comfort a…

The relationship between fundamental movement skills and self-reported physical activity during Finnish junior high school

2013

Background: Previous studies have shown that fundamental movement skills (FMS) and physical activity are related. Specifically, earlier studies have demonstrated that the ability to perform a variety of FMS increases the likelihood of children participating in a range of physical activities throughout their lives. To date, however, there have not been studies focused on the development of, or the relationship between, these variables through junior high school (that is, between the ages of 13 and 15). Such studies might provide important insights into the relationships between FMS and physical activity during adolescence, and suggest ways to design more effective physical education programm…

2016

Objective: The Emotional Cascade Model (ECM) by Selby et al. (2008) proposes that people often engage in dysregulated behaviors to end extreme, aversive emotional states triggered by a self-perpetuating vicious cycle of (excessive) rumination, negative affect and attempts to suppress negative thoughts. Method: Besides replicating the ECM, we introduced intrusions as a mediator between rumination and behavioral dysregulation and tested this extended ECM for compulsions as part of obsessive-compulsive disorders. A structural equation modeling approach was used to test this in a sample of N = 414, randomly recruited from the general population. Results: Intrusions were found to fully mediate t…

A Dynamic Viewpoint to Design Performance Management Systems in Academic Institutions: Theory and Practice

2014

This article illustrates how to design and apply Performance Management systems in academic institutions by identifying and modeling those factors affecting academic performance through a dynamic performance management view. Particularly, combining performance management with System Dynamics modeling may allow academic decision-makers to better identify key performance drivers for pursuing a sustainable performance improvement in universities. In the second section of the article, a number of examples based on empirical findings from a field project aimed at designing a dynamic performance management model for the University of Palermo (Italy) are discussed.

Contextual perceived group threat and radical right-wing populist party preferences: Evidence from Switzerland

2016

Existing studies suggest that perceived group threat is an important influence on radical right-wing populist party preferences. However, most have focused on perceived group threat at the individual level, overlooking the ideological climate. I examine how an ideological climate of group threat perception as a contextual factor can shape individual preferences for radical right-wing populist party preferences. I argue that above and beyond personal perceived group threat, the prevalence of local perceived group threat exerts a normative influence on personal preferences. Using voting preferences for the Swiss People’s Party, I employ multilevel structural equation modeling to examine the …

ICT adoption in hotels and electronic word-of-mouth

2015

Purpose The purpose of this paper is to investigate how information and communication technology (ICT) adoption in hotels contributes to satisfaction and loyalty from the consumer perspective, considering the online dimension of recommendations. Design/methodology/approach A quantitative research based on a structured questionnaire and using a personal survey method was developed. Surveys were conducted on 386 guests from Spanish hotels. Causal methodology by testing structural equation model was applied. Findings Significant relationships are obtained in the sequence “ICT use perception – satisfaction with ICT – overall satisfaction with the hotel – dimensions of loyalty” and the mediatin…