Results 191 to 200 of about 341,603 (246)

Linear Stability of Schwarzschild-Anti-de Sitter Spacetimes III: Quasimodes and Sharp Decay of Gravitational Perturbations. [PDF]

Commun Math Phys
Graf O, Holzegel G.
europepmc   +1 more source

Optimizing calibration designs with uncertainty in abilities

British Journal of Mathematical and Statistical Psychology, Volume 78, Issue 3, Page 889-910, November 2025.
Abstract Before items can be implemented in a test, the item characteristics need to be calibrated through pretesting. To achieve high‐quality tests, it's crucial to maximize the precision of estimates obtained during item calibration. Higher precision can be attained if calibration items are allocated to examinees based on their individual abilities ...
Jonas Bjermo, Ellinor Fackle‐Fornius, Frank Miller   +2 more
wiley   +1 more source

Hypercomplex neural networks: Exploring quaternion, octonion, and beyond in deep learning. [PDF]

MethodsX
Devadas RM, Hiremani V, Preethi, T S, R S, Gujjar P.   +5 more
europepmc   +1 more source

Scanner Data and the Construction of Inter‐Regional Price Indexes

Review of Income and Wealth, Volume 71, Issue 4, November 2025.
ABSTRACT The paper uses scanner data to measure the welfare effects of differing product availability across six Japanese regions. To eliminate the chain drift problem associated with the use of scanner data, various multilateral indexes were computed: GEKS, Geary–Khamis, and Weighted Time Product Dummy Hedonic price indexes.
W. Erwin Diewert, Naohito Abe, Akiyuki Tonogi, Chihiro Shimizu   +3 more
wiley   +1 more source

Quantitative description of internal 3D structure of a geological sample using algebraic topology methods. [PDF]

Sci Rep
Chernyavskiy M, Timoshenko V, Morkovkin A, Manukovskaya D, Zernyuk A, Grishin P, Kalashnikov A, Grachev E.   +7 more
europepmc   +1 more source

Space‐Time Boundary Elements on Graded Meshes for 3D Elastodynamics

International Journal for Numerical Methods in Engineering, Volume 126, Issue 20, 30 October 2025.
ABSTRACT The solution to the elastodynamic equations in the exterior of a polygonal or polyhedral domain or a screen exhibits singularities at corners and edges. This paper presents a space‐time boundary element method in 3D on algebraically graded meshes to resolve these singularities, based on recently obtained error estimates for the weakly singular
Alessandra Aimi, Luca Desiderio, Heiko Gimperlein, Chiara Guardasoni   +3 more
wiley   +1 more source

Group-based phylogenetic models on 3-sunlet networks. [PDF]

Bull Math Biol
Cox S, Gross E, Martin S.
europepmc   +1 more source

Tensor Analysis of Tropical Cyclone Boundary Layer Turbulence

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract Turbulent momentum transport critically influences tropical cyclone (TC) structure and intensity, but its multiscale characteristics remain poorly understood. Using two large eddy simulations, we investigate the Reynolds stress tensor and subfilter‐scale momentum flux tensor during rapid intensification and mature stages of an idealized TC. We
Shanghong Wang, Xu Zhang
wiley   +1 more source

Thermodynamics of Intrinsic Reaction Coordinate (IRC) Chemical Reaction Pathways. [PDF]

Entropy (Basel)
Weinhold F.
europepmc   +1 more source

Variable Density Interpolation for Dynamic Topology Optimization

International Journal for Numerical Methods in Engineering, Volume 126, Issue 19, 15 October 2025.
ABSTRACT Topology optimization problems are usually nonconvex, and different optimization paths often lead to different local optima. This phenomenon is particularly pronounced in dynamic situations, where it typically causes grayscale. The occurrence of grayscale is greatly dependent on material parameters such as stiffness and density. In particular,
Xinlin Xu, Takumi Sugiura, Hiroya Hoshiba, Koji Nishiguchi, Junji Kato   +4 more
wiley   +1 more source