Results 121 to 130 of about 4,343 (294)
Al-Mustansiriyah Journal of ScienceBackground: In many studies, spectral methods based on one of the orthogonal polynomials and weighted residual methods (WRMs) have been used to convert the variable-order fractional differential equation (VO-FDEs) into a system of linear or nonlinear ...
Abdulrazzaq T. Abed +1 more
doaj +1 more source
Addiction, Volume 120, Issue 4, Page 620-628, April 2025.Abstract Background and aims Many vaping products feature bright colors and novel brand names and flavor descriptors, which may appeal to youth. We measured the strength of the associations between e‐liquid packaging design (branded, white standardized or white standardized limiting brand and flavor descriptors) and perceived peer interest in trying ...
Eve Taylor +10 more
wiley +1 more source
Journal of Applied Mathematics, 2013 Approximate calculation of channel log-likelihood ratio (LLR) for wireless channels using Padé approximation is presented. LLR is used as an input of iterative decoding for powerful error-correcting codes such as low-density parity-check (LDPC) codes or ...
Gou Hosoya, Hiroyuki Yashima
doaj +1 more source
Formation of Business‐Nonprofit Collaborations: A Matching Approach
Business Ethics, the Environment &Responsibility, EarlyView.ABSTRACT Business‐nonprofit collaborations are essential for addressing organizational and societal challenges, yet research has largely examined their formation from the perspective of a single partner rather than as a two‐sided process. In this study, we conceptualize collaboration formation as a dyadic matching process and examine two related ...
Andrea Rizzuni, Paola Garrone
wiley +1 more source
British Journal of Educational Psychology, EarlyView.Abstract Background Social and emotional skills (SES) are key predictors of students' academic success and well‐being, yet how these skills cluster and vary across student groups remains underexplored in non‐Western contexts. Aims This study identified distinct SES profiles among Turkish adolescents and examined which demographic characteristics and ...
Nurcan Kahraman, Nani Teig, Yi Ding
wiley +1 more source
Property Preservation and Quality Measures in Meta-Models. [PDF]
This thesis consists of three parts. Each part considers different sorts of meta-models. In the first part so-called Sandwich models are considered. In the second part Kriging models are considered. Finally, in the third part, (trigonometric) Polynomials
Siem, A.Y.D.
core +1 more source
From tetrachoric to kappa: How to assess reliability on binary scales
British Journal of Mathematical and Statistical Psychology, EarlyView.Abstract Reliability is crucial in psychometrics, reflecting the extent to which a measurement instrument can discriminate between individuals or items. While classical test theory and intraclass correlation coefficients are well‐established for quantitative scales, estimating reliability for binary outcomes presents unique challenges due to their ...
Sophie Vanbelle
wiley +1 more source
Approximating multidimensionality with asymmetric unidimensional IRT models
British Journal of Mathematical and Statistical Psychology, EarlyView.Abstract Unidimensional item response theory (IRT) models are widely used even in settings where assessment data exhibit subtle forms of multidimensionality. Recent empirical evidence suggests that when item difficulty is associated with dimensionality, asymmetric item characteristic curves (ICCs) emerge in the unidimensional approximation.
Xiangyi Liao +5 more
wiley +1 more source
Bias and precision in true‐score estimation
British Journal of Mathematical and Statistical Psychology, EarlyView.Abstract We discuss two approaches to estimating the true score from classical test theory, each with a corresponding measure of uncertainty due to measurement error: the classical method with the standard error of measurement (SEM) and Kelley's method with the standard error of estimation (SEE).
L. Andries van der Ark +3 more
wiley +1 more source