Search results for "Statistics"

Accidents du travail dans l’UE-15 et méthodes d’apprentissage automatique

2020

Les méthodes d’apprentissage automatique ont été utilisées comme outil de prédiction dans denombreux domaines, mais leur utilisation en santé et sécurité au travail est relativement nouvelle.C’est la raison pour laquelle, il serait intéressant d’utiliser ces méthodes dans la prévision desaccidents du travail, sur les données d’enquêtes européennes sur les conditions de travail. L’objectifde ce travail est de tester les performances des techniques d’apprentissage automatique dans lamodélisation et la prédiction d’accidents du travail. A cette fin, nous utiliserons trois modèles :(les forêts aléatoires) (RF), Support Vector Machine (SVM), modèle logistique. Nous observonsque, la performance d…

Survival trends for primary liver cancer, 1995–2009: analysis of individual data for 578,740 patients from 187 population-based registries in 36 coun…

2019

CONCORD Working Group Members: Africa—Algeria: S Bouzbid (Registre du Cancer d’Annaba); M Hamdi-Chérif*, Z Zaidi (Registre du Cancer de Sétif); Gambia: R Swaminathan (National Cancer Registry); Lesotho: SH Nortje (Children’s Haematology Oncology Clinics - Lesotho); Libya: MM El Mistiri (Benghazi Cancer Registry); Mali: S Bayo, B Malle (Kankou Moussa University); Mauritius: SS Manraj, R Sewpaul-Sungkur (Mauritius National Cancer Registry); Nigeria: A Fabowale, OJ Ogunbiyi* (Ibadan Cancer Registry); South Africa: D Bradshaw, NIM Somdyala (Eastern Cape Province Cancer Registry); DC Stefan (Umtata University); Tunisia: L Jaidane, M Mokni (Registre du Cancer du Centre Tunisien).
America (Central…

Parametric sensitivity of a CFD model concerning the hydrodynamics of trickle-bed reactor (TBR)

2016

Abstract The aim of the present study was to investigate the sensitivity of a multiphase Eulerian CFD model with respect to relations defining drag forces between phases. The mean relative error as well as standard deviation of experimental and computed values of pressure gradient and average liquid holdup were used as validation criteria of the model. Comparative basis for simulations was our own data-base obtained in experiments carried out in a TBR operating at a co-current downward gas and liquid flow. Estimated errors showed that the classical equations of Attou et al. (1999) defining the friction factors Fjk approximate experimental values of hydrodynamic parameters with the best agre…

Constant sign and nodal solutions for parametric anisotropic $(p, 2)$-equations

2021

We consider an anisotropic ▫$(p, 2)$▫-equation, with a parametric and superlinear reaction term.Weshow that for all small values of the parameter the problem has at least five nontrivial smooth solutions, four with constant sign and the fifth nodal (sign-changing). The proofs use tools from critical point theory, truncation and comparison techniques, and critical groups. Spletna objava: 9. 9. 2021. Abstract. Bibliografija: str. 1076.

La calibrazione delle stime nell'indagine sul turismo incoming in Sicilia

2013

Pedagogical practices predicting perceived learning of social skills among university students

2022

The aim of this study was to examine what kinds of pedagogical practices predict perceived learning of university students’ social skills in classes where these skills are not set as learning outcomes. Data were collected from students of various disciplines by means of a questionnaire and then analysed using regression analysis. Students’ learning of social skills was explained by pedagogical factors related to 1) the modes of teaching and learning, 2) the features of the constructivist learning environment, 3) the features of the integrative pedagogy, and 4) the circumstances pertaining to the atmosphere of the learning environments involved in their studies. Factors belonging to three of…

Automatic evaluation of information provider reliability and expertise

2013

Published version of an article in the journal: World Wide Web. Also available from the publisher at: http://dx.doi.org/10.1007/s11280-013-0249-x Q&A social media have gained a lot of attention during the recent years. People rely on these sites to obtain information due to a number of advantages they offer as compared to conventional sources of knowledge (e.g., asynchronous and convenient access). However, for the same question one may find highly contradicting answers, causing an ambiguity with respect to the correct information. This can be attributed to the presence of unreliable and/or non-expert users. These two attributes (reliability and expertise) significantly affect the quality o…

Female reproductive factors are associated with objectively measured physical activity in middle-aged women

2017

Physical activity improves health and may delay the onset of several chronic diseases. For women in particular, the rate of these diseases accelerates at middle age; therefore it is important to identify the determinants of health-enhancing physical activity during midlife in this population. In this study, we focused on determinants that are unique to the female sex, such as childbearing and menopause. The main objective was to characterize the level of physical activity and differences between active and inactive middle-aged Finnish women. In addition, we examined the association of physical activity with female reproductive factors at midlife. The study population consisted of 647 women …

¿Por qué los estudiantes de la Universidad Pedagógica ISFODOSU escogen la carrera de Educación?

2020

As part of research aimed at establishing the profiles of students of new entry at ISFODOSU, we include vocational variables to determine the most important motivations for the choice of career of the participants, as well as for the election of this university and opinion on its technological resources. The sample (No. 744) was chosen at random, proportionally among the Enclosures, Careers and Sex strata. First, we validate the FIT-Choice scale with two confirmatory factorial analyses. The 12 motivational factors showed a good level of fit (RMSEA .062; CFI .92 and TLI .901, as well as the 6 perceptual factors (RMSEA .062; CFI .944 and TLI .924). The reliability of the motivational factors …

Referee efficacy in the context of Norwegian soccer referees – A meaningful construct?

2018

Abstract Objectives The purpose of this study was two-fold. Firstly, to examine the measurement/factorial validity and invariance of the Referee Self-Efficacy Scale (REFS) among Norwegian soccer referees. Secondly, extending scale validation, we also tested a structural model in which a second-order version of the REFS was modelled to mediate a set of theoretically informed antecedents and outcomes. Design Cross-sectional. Method One hundred and eleven Norwegian elite referees and 81 non-elite referees completed an electronic questionnaire measuring expected antecedents and outcomes of perceived self-efficacy in the role as referees. Results Analyses provided support for the first – and sec…