Results 91 to 100 of about 24,896 (183)

Space‐Time FEM Solution of Dynamic Contact Problem With Discontinuous Velocity for Multiple Impact of Deformed Bar Using PDAS Method

Mathematical Methods in the Applied Sciences, Volume 49, Issue 7, Page 5897-5912, 15 May 2026.
ABSTRACT A class of one‐dimensional impact and dynamic contact problems taking into account non‐smooth velocities is studied. The new space‐time finite element approximation of dynamic variational inequalities is suggested. The non‐smooth solution for the impact of an obstacle by an elastic bar and its energy conservation under persistency conditions ...
Victor A. Kovtunenko, Adrien Petrov, Yves Renard   +2 more
wiley   +1 more source

Limit Cycles in a Class of Planar Discontinuous Piecewise Quadratic Differential Systems with a Non-regular Line of Discontinuity (II)

Mediterranean Journal of Mathematics
In this paper we study the limit cycles which bifurcate from the periodic orbits of the quadratic uniform isochronous center ẋ = -y + xy, ẏ = x + y, when this center is perturbed inside the class of all discontinuous piecewise quadratic polynomial differential systems in the plane with two pieces separated by a non-regular line of discontinuity, which ...
Dongping He, Jaume Llibre
openaire   +5 more sources

Two limit cycles for a class of discontinuous piecewise linear differential systems with two pieces

Sibirskie Elektronnye Matematicheskie Izvestiya, 2020
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Analysis of a Mathematical Model of Marital Satisfaction

Mathematical Methods in the Applied Sciences, Volume 49, Issue 7, Page 6143-6157, 15 May 2026.
ABSTRACT A large number of marriages end in divorce. In this paper, we present a model for the emotional state of a couple based on bilinear ordinary differential equations. We study the effect of changes of each individual's self‐emotional state on the couple's state.
Benito Chen‐Charpentier, C. E. Garza‐Hume, M. C. Jorge   +2 more
wiley   +1 more source

Reduced risk of dementia with recombinant zoster vaccine in US adults age 65 or older

Alzheimer's &Dementia, Volume 22, Issue 5, May 2026.
Abstract INTRODUCTION Herpes zoster vaccines may lower the risk of dementia onset. We evaluated new‐onset dementia among US Medicare beneficiaries ≥65 years old following recombinant zoster vaccination (RZV). METHODS We matched one RZV‐exposed to two RZV‐unvaccinated on age, sex, and race/ethnicity. Individuals were ≥65 years old on the RZV dose 2 date
Susan dos Reis, Phuong Tran, Kareshma Mohanty, Alejandro Amill‐Rosario, Abree Johnson, Kathleen Ryan, Hannah Alsdurf, Driss Oraichi, Huifeng Yun   +8 more
wiley   +1 more source

Impact of Variations in Membership Functions on the Performance of ANFIS for Nonlinear Systems as a Benchmark

Engineering Reports, Volume 8, Issue 5, May 2026.
The graphical abstract illustrates how different membership functions influence the performance of ANFIS when applied to nonlinear system control, demonstrating clear variations in overshoot, settling behavior, and training accuracy across the four MF types.
Daniel Arega Mengesha
wiley   +1 more source

Generalised Kinematic Single‐Impact and Multi‐Impact Models for Rocking Structures

Earthquake Engineering &Structural Dynamics, Volume 55, Issue 6, Page 1179-1202, May 2026.
ABSTRACT The rocking motion is fundamental in earthquake engineering, as it reflects the dynamic behaviour of many structural systems. However, simulating the impacts during rocking motion remains a challenging topic, as they occur in a very short time, generate high impulsive forces, cause sudden changes in velocities and result in rapid energy losses.
Georgios Vlachakis, Carla Colombo, Anastasios I. Giouvanidis, Paulo B. Lourenço   +3 more
wiley   +1 more source

Continuous-discontinuous piecewise differential systems with two pieces separated by a non-regular line

Discrete and Continuous Dynamical Systems - B
During the first years of this century, many papers have been published on the piecewise differential systems. The interest in these systems is mainly due to their increasing number of applications for modeling many natural phenomena. One of the main difficulties in understanding the dynamics of these systems consists in controlling their limit cycles.
Li, Jie, Llibre, Jaume
openaire   +2 more sources

Integration of Time‐Varying Pharmacometric Modeling With Cox Regression for Time‐to‐Event Analysis in NONMEM

CPT: Pharmacometrics &Systems Pharmacology, Volume 15, Issue 5, May 2026.
ABSTRACT Although time‐varying Cox regression modeling approaches have been developed, exposure–response analyses for time‐to‐event (TTE) endpoints often rely on static exposure covariates and may overlook the real‐world dosing variability and drug concentration fluctuations over time. To better characterize pharmacokinetic (PK) or pharmacodynamic (PD)
Chih‐Wei Lin, Po‐Wei Chen, Sameer Doshi, Sandeep Dutta   +3 more
wiley   +1 more source

Strategic (Inconsistent) Disclosures and Sophisticated Investors: Evidence from Hedge Funds

Journal of Accounting Research, Volume 64, Issue 2, Page 923-978, May 2026.
ABSTRACT Recent SEC regulations require that qualified hedge fund advisers provide their investors with narrative disclosures of their business and operations. We find that 40% of these disclosures omit or de‐emphasize information regarding advisers' operational and investment risks when compared to other sources of public information. Funds with such “
YICHANG LIU, JOSHUA MADSEN, FRANK S. ZHOU   +2 more
wiley   +1 more source