ABSTRACT Purpose To improve the accuracy of diffusion‐weighted powder average signals for diffusion encoding with arbitrary b‐tensors. Methods We identify an intrinsic dihedral (D2) symmetry of diffusion signals for arbitrary diffusion encoding, which defines their natural signal space (a quotient of 3D rotations). Based on this, we propose a method to
Sune Nørhøj Jespersen +1 more
wiley +1 more source
From forward-backward sweep to backpropagation for optimal control in tumor-immune dynamics. [PDF]
Zhang W, Ding W, Zhu H.
europepmc +1 more source
Radial Tiny Golden Angle UTE (tyGA‐UTE) for Cardiac MRI in the Small Animal Model
This study validates an 11.7‐T ultra‐high‐field tyGA‐UTE cardiac MRI workflow for murine models, featuring single‐acquisition dual reconstructions for real‐time visualization and quantitative functional assessment. It delivers performance equivalent to standard techniques, excellent reproducibility, and higher efficiency by eliminating repeated scans ...
Hao Li +4 more
wiley +1 more source
The finite element neural network method to simulate two dimensional partial differential equations and perform parameter identification. [PDF]
Abda M +7 more
europepmc +1 more source
On Gaussian–Bessel Integrals in Diffusion‐Based Wind‐Turbine Wake Models
ABSTRACT The diffusion wake model provides an analytical description of turbine‐wake evolution from a top‐hat profile in the near wake to a self‐similar Gaussian profile in the far wake. The main formulation of the model involves an integral containing the product of linear, Gaussian, and modified Bessel‐function terms. This integral is closely related
Karim Ali
wiley +1 more source
Wavelet-Assisted Adaptive EKF Phase Shift Estimation Approach for Motion-Induced Error Compensation. [PDF]
Lai X, Yu Q, Chen Z.
europepmc +1 more source
Van Allen Probes Observations of a Fundamental Poloidal Wave in the Plasmasphere
Abstract All past spacecraft observations of fundamental poloidal Alfvén (P1) waves attributed to ion drift resonance have been made outside the plasmasphere. In this study, we present the first spacecraft observations of a plasmaspheric P1 wave driven by that resonance.
Kazue Takahashi +4 more
wiley +1 more source
Exploring memory effects: Sparse identification in vector-borne diseases. [PDF]
Breda D, Tanveer M, Wu J, Zhang X.
europepmc +1 more source
From tetrachoric to kappa: How to assess reliability on binary scales
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
Asymptotic standard errors for reliability coefficients in item response theory
Abstract In a recent review, Liu et al. (Psychological Methods, 2025b) classified reliability coefficients into two types: classical test theory (CTT) reliability and proportional reduction in mean squared error (PRMSE). This article focuses on quantifying the sampling variability of these coefficients under item response theory (IRT) models.
Youjin Sung, Yang Liu
wiley +1 more source

