Search results for "Factorial analysis"
showing 10 items of 38 documents
The effect of light curing units and modes on cytotoxicity of resin-core systems
2010
Objective: The aim of this study was to compare the cytotoxic effects of various resin-based core materials that were cured with three light curing units (LCUs) in different modes on L?929 mouse fibroblast cells over 24 h and 72 h periods. Study design: Eighty-four cylindrical discs (2 mm in thickness and 6 mm in diameter) of each material (Rebilda, Voco; Build-It FR, Pentron; Clearfil DC Core, Kuraray and Bis-core, Bisco) were cured by QTH LCU (soft-up and high-power modes), LED LCU (exponential and standard modes) and PAC LCU (normal and ramp-curing modes). Then the samples were aged for 24 and 72 hours in Dulbecco?s Modified Eagle Medium/Ham?s F12 (DMEM/F12). After each ageing interval, …
Typologie des cooperatives de credit espagnoles par la methode des groupes strategiques. Une etude empirique
1997
The objective is to apply the Strategic Groups approach to the sub-sector of credit cooperatives, organizations on which Strategic Groups analysis has not been applied yet although they are part of the banking sector. Therefore taking into account the theoretical arguments presented on SG, the authors apply them according to the following stages: identification of the group of banking organizations composing the object of the study (in this case, credit cooperatives) while analysing their main characteristics; choice of the subset of banking organizations forming the analysed sample; determination of key strategic variables to define credit cooperatives’ strategies; and application of the r…
Modelling by Statistic in Research of Mathematics Education
2008
Summary. The aim of this paper is to study the quantitative tools of the research in didactics. We want to investigate the theoretical-experimental relationships between factorial and implicative analysis. This chapter consists of three parts. The first one deals with the didactic research and some fundamental tools: the a priori analysis of a didactic situation, the collection of experimental data and the statistic analysis of data. The purpose of the second and the third section is to introduce the experimental comparison between the factorial and the implicative analysis in two researches in mathematics education.
Validez factorial de la adaptación al español del Maslach Burnout Inventory-General Survey
2002
Objective. To explore the factorial structure of a Spanish version of the “Maslach Burnout Inventory-General Survey” (MBI-GS). Material and Methods. A cross-sectional study was conducted in 1999 among 149 municipal policemen in Tenerife, Spain. A questionnaire was applied to collect data on Professional Efficacy, Cynicism, and Burnout. Data were analyzed using factorial analysis and principal components with Varimax rotation. Results. Four factors had eigenvalues greater than 1; Factor 1 gouped Professional Efficacy items, Factor II grouped three Cynicism items. Further analysis was conducted to limit extraction to three factors. The factorial solution replicated the distribution of items i…
Análisis factorial confirmatorio de la escala Valencia de actitudes y creencias hacia la hipnosis (versión cliente revisada), en una muestra española
2015
Diversas aproximaciones a la hipnosis han destacado la relevancia de las actitudes y creencias sobre ella para la promoción de las respuestas hipnóticas, para predecir la eficacia de las intervenciones que incluyen a la hipnosis, y para evitar iatrogenia en los usuarios que la reciben. El objetivo de este trabajo es investigar la nueva variación en castellano de La Escala de Valencia de Actitudes y Creencias hacia la Hipnosis versión Cliente. Se ha analizado su estructura factorial y propiedades psicométricas con metodología confirmatoria, usando una muestra exclusivamente española, para observar si se confirman los resultados de anteriores investigaciones exploratorias y confirmatorias rea…
Why do university students choose tourism degrees? Interests analysis and employ-ment expectations for students from Universitat de València
2019
Las expectativas del alumnado que determinan la elección de una titulación en Turismo condicionan sus conductas durante y después de sus estudios. Para identificar estas expectativas se realizó una encuesta al alumnado de Turismo de primer curso. Un análisis factorial nos ha permitido identificar los factores de mayor peso en la elección: Internacionalización, Expectativas de empleo, Emprendimiento, Importancia del sector e Interés por la titulación. Finalmente, se ha completado el estudio analizando sus expectativas sobre las salidas profesionales vinculadas al ámbito turístico. Interests that drive students to choose a Tourism degree will condition their behaviour in their studies and lat…
A new tool to classifying new technology-based firm prospects and expectations
1999
Abstract This is an exploratory insight into the profile and prospects of growth and success attached to one category of firms, the so-called New Technology-Based Firms (NTBFs). Analysis of our empirically based data from 30 NTBFs leads us to the Market-Technology-Entrepreneurial (M-T-E) Matrix, whose eight three-dimensional quadrants serve to classify high-tech new ventures by performance. A factorial analysis coupled with a discriminate analysis are the statistical tools employed in obtaining the M-T-E Matrix and ascribing predictive capacity to it.
Phase mixture in MOCVD and reactive sputtering TiOxNy thin films revealed and quantified by XPS factorial analysis.
2006
Abstract Titanium oxynitride thin films have been deposited by low-pressure metalorganic chemical vapour deposition and reactive sputtering. The growth temperature for chemical vapour-deposited films and water vapour partial pressure for sputter-deposited films have been used to modulate the chemical composition. Both series have been analysed using X-ray photoelectron spectroscopy (XPS) in order to describe the structure of the materials using a factorial analysis approach. Titanium and metalloid concentrations have also been determined and compared to an elemental analysis performed using Rutherford backscattering spectroscopy and nuclear reaction analysis. The two deposition methods led …
Relevant factors for the eco-design of polylactide/sisal biocomposites to control biodegradation in soil in an end-of-life scenario
2017
[EN] The eco-design considers the factors to prepare biocomposites under an end-of-life scenario. PLA/sisal biocomposites were obtained from amorphous polylactide and sisal loadings of 10, 20 and 30 wt% with and without coupling agent, and subjected to biodegradation in soil according to standard IS0846. Mass loss, differential scanning calorimetry and size-exclusion chromatography were used for monitoring biodegradation. A statistical factorial analysis based on the molar mass M-n, and crystallinity degree X-c pointed out the relevance and interaction of amount of fibre and use of coupling agent with the time of burial in soil., During the preparation of biocomposites, chain scission provo…
Using Cox's proportional hazards model for prognostication in carcinoma of the upper aero-digestive tract.
1992
One of the major short comings of the traditional TNM system is its limited potential for prognostication. With the development of multifactorial analysis techniques, such as Cox's proportional hazards model, it has become possible to simultaneously evaluate a large number of prognostic variables. Cox's model allows both the identification of prognostically relevant variables and the quantification of their prognostic influence. These characteristics make it a helpful tool for analysis as well as for prognostication. The goal of the present study was to develop a prognostic index for patients with carcinoma of the upper aero-digestive tract which makes use of all prognostically relevant var…