Results 21 to 30 of about 4,447,912 (339)

The carbon allotrope glitter as n-diamond and i-carbon nanocrystals [PDF]

open access: yes, 2011
Diffraction data taken from nanocrystalline n-diamond and i-carbon forms is fit to a so-called glitter model, in which the geometry of the C lattice has been optimized by density functional theory (DFT).
Eduardo A. Castro, Michael J. Bucknum
core   +3 more sources

On the Sequential Hierarchical Cognitive Diagnostic Model

open access: yesFrontiers in Psychology, 2020
Model data fit plays an important role in any statistical analysis, and the primary goal is to detect the preferred model based on certain criteria. Under the cognitive diagnostic assessment (CDA) framework, a family of sequential cognitive diagnostic ...
Xue Zhang, Juntao Wang
doaj   +1 more source

Structural Equation Modeling of Job Engagement in Pediatric Nurses Based on the Job Crafting Model [PDF]

open access: yesChild Health Nursing Research, 2020
Purpose The goal of this study was to construct a structural equation model of job engagement in pediatric nurses based on Tims and Bakker's job crafting model.
Jung Mi Kang, Hun Ha Cho
doaj   +1 more source

Composite Goodness of Fit in Reaeration Coeffcient Modeling [PDF]

open access: yes, 2012
Determination of reaeration coefficient is an important factor in surface water quality modeling as it determines the efficiency of the Streeter-Phelps model used for predicting dissolved oxygen deficit of any stream. This study compared the efficiency
Omole, D. O.
core   +1 more source

Students' academic well-being based on the perceived social support and cognitive flexibility: a model with mediating role of psychological hardiness

open access: yesSocial Determinants of Health, 2022
Background: This study aimed to design a model of students’ academic well-being based on the role of perceived social support and cognitive flexibility mediated by psychological hardiness.
Azam Vaziri Nasab   +3 more
doaj   +1 more source

A New 5-Flavour LO Analysis and Parametrization of Parton Distributions in the Real Photon [PDF]

open access: yes, 2002
New, radiatively generated, LO quark (u,d,s,c,b) and gluon densities in a real, unpolarized photon are presented. We perform a global 3-parameter fit, based on LO DGLAP evolution equations, to all available data for the structure function F2^gamma(x,Q^2).
A. Chuvakin   +67 more
core   +3 more sources

Comparing Bayesian spatial models: Goodness-of-smoothing criteria for assessing under- and over-smoothing.

open access: yesPLoS ONE, 2020
BACKGROUND:Many methods of spatial smoothing have been developed, for both point data as well as areal data. In Bayesian spatial models, this is achieved by purposefully designed prior(s) or smoothing functions which smooth estimates towards a local or ...
Earl W Duncan, Kerrie L Mengersen
doaj   +1 more source

PENGEMBANGAN INVESTASI WILAYAH PERBATASAN, INDUSTRI MARITIM DAN KAWASAN PERDAGANGAN BEBAS DALAM MENINGKATKAN KESEJAHTERAAN MASYARAKAT PESISIR DI PROVINSI KEPULAUAN RIAU

open access: yesJurnal Pendidikan Ekonomi dan Bisnis (JPEB), 2017
The purpose of this research to create the boder region of investment development model, the maritime industry investment development model and Free Trade Zone development model effect on increase the welfare of coastal communities.The research location ...
Tumpal Manik   +2 more
doaj   +1 more source

A simulation-based scaled test statistic for assessing model-data fit in least-squares unrestricted factor-analysis solutions

open access: yesMethodology, 2023
A shortcoming of least-squares unrestricted factor analysis (UFA) procedures, which are widely used in psychometric applications is that a test statistic for assessing model-data fit cannot be easily derived from the minimum fit function value. This paper proposes a chi-square type goodness-of-fit test statistic intended for the principal-axis, MINRES,
Urbano Lorenzo-Seva, Pere J. Ferrando
openaire   +2 more sources

Evaluating Model Fit in Two-Level Mokken Scale Analysis

open access: yesPsych, 2023
Currently, two-level Mokken scale analysis for clustered test data is being developed. This paper contributes to this development by providing model-fit procedures for two-level Mokken scale analysis.
Letty Koopman   +2 more
doaj   +1 more source

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