Results 1 to 10 of about 9,800 (195)

Extensions to Mean–Geometric Mean Linking

open access: yesMathematics
Mean-geometric mean (MGM) linking is a widely used method for linking two groups within the two-parameter logistic (2PL) item response model. However, the presence of differential item functioning (DIF) can lead to biased parameter estimates using the ...
Alexander Robitzsch
doaj   +4 more sources

Estimation of Standard Error, Linking Error, and Total Error for Robust and Nonrobust Linking Methods in the Two-Parameter Logistic Model

open access: yesStats
The two-parameter logistic (2PL) item response theory model is a statistical model for analyzing multivariate binary data. In this article, two groups are brought onto a common metric using the 2PL model using linking methods. The linking methods of mean–
Alexander Robitzsch
doaj   +4 more sources

Comparing Different Specifications of Mean–Geometric Mean Linking

open access: yesFoundations
Mean–geometric mean (MGM) linking compares group differences on a latent variable θ within the two-parameter logistic (2PL) item response theory model.
Alexander Robitzsch
doaj   +2 more sources

Assessing Standard Error Estimation Approaches for Robust Mean-Geometric Mean Linking

open access: yesAppliedMath
Robust mean-geometric mean (MGM) linking methods enable reliable group comparisons in item response theory models under fixed and sparse differential item functioning.
Alexander Robitzsch
doaj   +2 more sources

Parameterizations of size distribution and refractive index of biomass burning organic aerosol with black carbon content [PDF]

open access: yesAtmospheric Chemistry and Physics, 2022
Biomass burning organic aerosol (BBOA) impacts significantly on climate directly through scattering and absorbing solar radiation and indirectly through acting as cloud condensation nuclei.
B. Luo   +18 more
doaj   +1 more source

REGISTRATION OF REMOTE SENSING IMAGES BASED ON FEATURE FUSION TECHNIQUES [PDF]

open access: yesInternational Journal of Intelligent Computing and Information Sciences, 2016
Geometric correction is used to correct the registration errors in remotely sensed images. These images are often compared to ground control points (GCPs) either by using an accurate map (image to map) or using another geo-referenced image (image to ...
M. Asker   +3 more
doaj   +1 more source

Review of calculating the electrical conductivity of mineral aggregates from constituent conductivities

open access: yesSolid Earth Sciences, 2021
The electrical conductivity of mineral aggregates depends both on the properties of the constitutive minerals and the ways those minerals are assembled.
Kui Han, Simon Martin Clark
doaj   +1 more source

Mean and standard deviation of multipliers linking symptomatic cases and hospital admissions.

open access: yes, 2023
Mean and standard deviation of multipliers linking symptomatic cases and hospital admissions.
Matthew Biggerstaff (385559)   +5 more
core   +1 more source

Petrophysical Joint Inversion Applied to Alpine Permafrost Field Sites to Image Subsurface Ice, Water, Air, and Rock Contents

open access: yesFrontiers in Earth Science, 2020
Quantification of ground ice is crucial for understanding permafrost systems and modeling their ongoing degradation. The volumetric ice content is however rarely estimated in permafrost studies, as it is particularly difficult to retrieve.
Coline Mollaret   +4 more
doaj   +1 more source

Pharmacokinetics, Pharmacodynamics, Safety and Immunogenicity of CMAB807, a New Denosumab Biosimilar, in Healthy Chinese Subjects

open access: yesFrontiers in Pharmacology, 2022
Objective: Pharmacokinetics (PK), pharmacodynamics (PD), safety and immunogenicity studies were conducted to evaluate the bioequivalence of CMAB807, a biosimilar to denosumab (Prolia®), which is the only approved RANKL inhibitor for the treatment of ...
Hanjing Chen   +6 more
doaj   +1 more source

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