Results 91 to 100 of about 152,344 (258)

Rational, Replacement, and Local Invariants of a Group Action

, 2005
The paper presents a new algorithmic construction of a finite generating set of rational invariants for the rational action of an algebraic group on the affine space.
Hubert, Evelyne, Kogan, Irina A.
core   +1 more source

On Generalized Avicenna Numbers

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT Avicenna numbers that we define in this paper, are a class of figurate numbers, including icosahedral, octahedral, tetrahedral, dodecahedral, rhombicosidodecahedral numbers and cubes, play a key role in mathematics, physics and various scientific fields.
Melih Göcen, Yüksel Soykan
wiley   +1 more source

Application of Variable Step‐Size Hybrid Methods for Solving Third‐Order Lane‐Emden Equations

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This manuscript introduces a pair of variable step‐size hybrid methods (PVSHM) to efficiently solve third‐order initial value problems of Lane‐Emden‐type equations (LETE). These equations are extensively used across various disciplines, including chemical engineering, fluid mechanics, physics, and astrophysics, to model a wide range of real ...
Mufutau Ajani Rufai, Thanh Tran, Bruno Carpentieri, Higinio Ramos   +3 more
wiley   +1 more source

Dynamical Analysis of an HIV Infection Model Including Quiescent Cells and Immune Response

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This research gives a thorough examination of a human immunodeficiency virus (HIV) infection model that includes quiescent cells and immune response dynamics in the host. The model, represented by a system of ordinary differential equations, captures the complex interaction between the host's immune response and viral infection.
Ibrahim Nali, Attila Dénes, Abdessamad Tridane, Xueyong Zhou   +3 more
wiley   +1 more source

Latent space reconstruction for missing data problems in CT

Medical Physics, EarlyView.
Abstract Background The reconstruction of a computed tomography (CT) image can be compromised by artifacts, which, in many cases, reduce the diagnostic value of the image. These artifacts often result from missing or corrupt regions in the projection data, for example, by truncation, metal, or limited angle acquisitions.
Anton Kabelac, Elias Eulig, Joscha Maier, Maximilian Hammermann, Michael Knaup, Marc Kachelrieß   +5 more
wiley   +1 more source

Exploring the Elastic Properties of Interfacial Transition Zone in Concrete Materials Using an Ensemble Learning Approach

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Concrete materials consist of multiple phases with distinct mechanical properties, making it essential to accurately identify the mechanical behavior of both constituent phases and their interfaces for effective multiscale modeling. This study estimates the elastic properties of the interfacial transition zone using a machine learning (ML ...
Jing Xue, Yajun Cao, Xiaolong Zhao, Jianfu Shao   +3 more
wiley   +1 more source

Adaptive sampling for ecological monitoring using biased data: a stratum‐based approach

Oikos, EarlyView.
Indicators of biodiversity change across large extents of geographic, temporal and taxonomic space are frequent products of various types of ecological monitoring and other data collection efforts. Unfortunately, many such indicators are based on data that are highly unlikely to be representative of the intended statistical populations.
Oliver L. Pescott, Gary D. Powney, Rob J. Boyd   +2 more
wiley   +1 more source

Quantifying community keystoneness in metacommunities under disturbance

Oikos, EarlyView.
Understanding how metacommunities respond to natural and anthropogenic disturbances is a key objective in ecology. In this study, we introduce an analytical framework to identify communities whose extirpation triggers stronger (hereafter keystone communities) or weaker (hereafter idle communities) cascading effects on extinction and colonization events
Gabriel Khattar, Pedro R. Peres-Neto
wiley   +1 more source

Partial zeta functions of algebraic varieties over finite fields

, 2000
Daqing Wan
openalex   +2 more sources

Early Adolescent Cyberbullying Victimization, Learning Readiness, and Academic Achievement Among South Australian Students

Psychology in the Schools, EarlyView.
ABSTRACT Cyberbullying is an increasingly researched topic in the field of adolescence, largely due to its pervasiveness and negative wellbeing outcomes for victims. However, existing literature in this area largely focuses on those aged above 13 years, despite evidence suggesting that early adolescents (ages 10–13) also experience victimization ...
Jasmin Williams, Sarah Halliday
wiley   +1 more source