Search results for " Modeling"

Effects of feedback on self-efficacy, performance, and choice in an athletic task

1999

Abstract The purpose of the study was to examine the impact of feedback on self-efficacy, performance, and task choice, and the mediating effects of self-efficacy in the feedback-performance and task choice relationships. Participants were 69 Spanish students, 46 males and 23 females, between 18 and 24 years. The experimental paradigm consisted of three sessions. In the first, participants performed on the hurdles. In the second, manipulated feedback referring to the previous performance was provided. Participants then estimated their self-efficacy for a second task which they later performed. In the third session, participants were presented with three tasks involving clearing hurdles of p…

Associations Between the Residential Environment and Physical Activity in German College Students and the Role of Self-Efficacy as a Mediator

2014

Social-ecological models suggest that influences on physical activity should be examined on multiple levels, but most of the empirical studies in this area have investigated the different levels separately. To integrate the different levels, we examined self-efficacy with respect to physical exercise as a mediator of the relation between environmental characteristics and physical activity. In a cross-sectional German study, 1,292 college students completed a questionnaire that included measures of their perceived residential environment, self-efficacy, and physical activity. Structural equation modeling was used to assess direct and indirect effects on physical activity. The cycling and wa…

The effects of self‐efficacy, hope, and engagement on the academic achievement of secondary education in the Dominican Republic

2019

Pre-service teachers’ self-efficacy in implementing inclusive practices and resilience in Finland

2021

Abstract This study aims to explore Finnish pre-service teachers' self-efficacy in implementing inclusive education and their resilience. Survey data were collected from 105 pre-service teachers studying in a teacher education programme in one university in Finland. The relationships between pre-service teachers' self-efficacy in implementing inclusive practices, their perceived resilience, and background variables were examined using structural equation modelling. The results confirmed a three-factor structure for self-efficacy in implementing inclusive practices among the pre-service teachers. In addition, pre-service teachers’ self-efficacy was the strongest variable that related to thei…

Studying the feasibility of a recommender in a citizen web portal based on user modeling and clustering algorithms

2006

This paper presents a methodology to estimate the future success of a collaborative recommender in a citizen web portal. This methodology consists of four stages, three of them are developed in this study. First of all, a user model, which takes into account some usual characteristics of web data, is developed to produce artificial data sets. These data sets are used to carry out a clustering algorithm comparison in the second stage of our approach. This comparison provides information about the suitability of each algorithm in different scenarios. The benchmarked clustering algorithms are the ones that are most commonly used in the literature: c-Means, Fuzzy c-Means, a set of hierarchical …

Web mining based on Growing Hierarchical Self-Organizing Maps: Analysis of a real citizen web portal☆

2008

This work is focused on the usage analysis of a citizen web portal, Infoville XXI (http://www.infoville.es) by means of Self-Organizing Maps (SOM). In this paper, a variant of the classical SOM has been used, the so-called Growing Hierarchical SOM (GHSOM). The GHSOM is able to find an optimal architecture of the SOM in a few iterations. There are also other variants which allow to find an optimal architecture, but they tend to need a long time for training, especially in the case of complex data sets. Another relevant contribution of the paper is the new visualization of the patterns in the hierarchical structure. Results show that GHSOM is a powerful and versatile tool to extract relevant …

DNA-Binding and Anticancer Activity of Pyrene-Imidazolium Derivatives

2016

DNA-binding investigations showed that two different derivatives endowed with pyrene and imidazolium moieties, 1 and 2, strongly bind both double-stranded DNA and telomeric sequences in G-quadruplex (G4) conformation. The values of the DNA-binding constants indicate that 1 and 2 show preferential affinity for G4-DNA, of about one and two orders of magnitude, respectively. Moreover, 1 and 2 inhibit short and long-term proliferation of breast cancer cell lines in a time- and dose-dependent fashion. Remarkably, senescence assays indicate that telomeric G4-DNA is a possible biotarget for the cytotoxic activity of 2. Molecular dynamics simulations suggest that the stronger binding of 2 with G4-D…

SINGLE FACTOR STOCHASTIC MODELS WITH SEASONALITY APPLIED TO UNDERLYING WEATHER DERIVATIVES VARIABLES

2003

This paper estimates single factor stochastic models describing daily air temperature behaviour. We modify classical financial models to reflect temperature seasonality and fit them to a time series representing temperatures in Spain. The estimated models are used in Montecarlo simulations to obtain heating and cooling degree-days, which are used as an underlying reference in weather derivatives. The final goal of this work is to obtain an insight into weather derivative valuation, and so making it easier to manage economic activity risks closely related to temperature (i.e. oil, gas and electricity prices and volumes). En este trabajo se estiman modelos estocásticos unifactoriales que desc…

Experimental Performance Evaluation of Cloud-Based Analytics-as-a-Service

2016

An increasing number of Analytics-as-a-Service solutions has recently seen the light, in the landscape of cloud-based services. These services allow flexible composition of compute and storage components, that create powerful data ingestion and processing pipelines. This work is a first attempt at an experimental evaluation of analytic application performance executed using a wide range of storage service configurations. We present an intuitive notion of data locality, that we use as a proxy to rank different service compositions in terms of expected performance. Through an empirical analysis, we dissect the performance achieved by analytic workloads and unveil problems due to the impedance…

Unlocking behaviors of long-term service consumers : the role of action inertia

2017

Purpose The purpose of this paper is to examine the antecedents of word-of-mouth (WOM) in long-term service settings. Specifically, the authors examine the moderating role of action inertia in the relationships between satisfaction and repatronage intention, satisfaction and WOM, and repatronage intention and WOM. Design/methodology/approach The proposed model was empirically tested using survey data from 1,385 telecommunications service subscribers. The data were analyzed using partial least squares path modeling. Findings Results suggest that a positive link between repatronage intention and WOM, hereto a neglected relationship in the marketing literature, in contrast to previous literat…