Results 31 to 40 of about 3,518 (241)

Nonlinear dynamic response and global stability of an air compressor vibration system

Journal of Low Frequency Noise, Vibration and Active Control, 2019
This study proposes a strategy for the vibration isolation mounting of an air compressor to attenuate the vibration near the primary resonance region by using a system with dynamic negative stiffness.
Yuanping Li, Xuemin Wang, Siyu Chen, Hongbing Lu   +3 more
doaj   +1 more source

Global Phase Portrait of a Rolling Motion of Ships Equation

Qualitative Theory of Dynamical Systems
Abstract This paper studies the global dynamics of the rolling motion of ships in random beam seas model described by the equation $$\begin{aligned} \ddot{x}+ (2\mu + \delta x^2){\dot{x}} + \omega ^2 x-\frac{1}{a^2} x^3=0, \end{aligned}$$
Martha Álvarez–Ramírez, Jaume Llibre
openaire   +3 more sources

Global Phase Portraits of the Quadratic Systems Having a Singular and Irreducible Invariant Curve of Degree 3

International Journal of Bifurcation and Chaos, 2023
Any singular irreducible cubic curve (or simply, cubic) after an affine transformation can be written as either [Formula: see text], or [Formula: see text], or [Formula: see text]. We classify the phase portraits of all quadratic polynomial differential systems having the invariant cubic [Formula: see text]. We prove that there are [Formula: see text]
Pantazi, Chara, Llibre Saló, Jaume
openaire   +4 more sources

Quadratic systems with two invariant real straight lines and an invariant parabola

Electronic Journal of Qualitative Theory of Differential Equations
After the linear differential systems in the plane the easiest ones are the quadratic polynomial differential systems. Due to their nonlinearity and also to their many applications these systems have been studied by many authors. Let QS denote the set of
Jaume Llibre, Huaxin Ou
doaj   +1 more source

Model of new information dissemination in society

St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019
Diversification of any new idea, the concept in society both in general and within various classes and social groups often begins with information emergence in media concerning a goal.
Timofeev Sergey, Sukhodolov Alexsander
doaj   +1 more source

Global phase portraits of uniform isochronous centers with quartichomogeneous polynomial nonlinearities

Discrete and Continuous Dynamical Systems - B, 2016
We classify the global phase portraits in the Poincar\'e disc of the differential systems =-y xf(x,y), =x yf(x,y), where f(x,y) is a homogeneous polynomial of degree 3. These systems have a uniform isochronous center at the origin. This paper together with the results presented in IL2 completes the classification of the global phase portraits in the ...
Itikawa, Jackson, Llibre, Jaume
openaire   +2 more sources

Artery‐on‐Chip Demonstrates Mechanical and Functional Features of Healthy and Diseased Living Smooth Muscle Tissue

Advanced Functional Materials, EarlyView.
This article details the development of an artery‐on‐chip platform for in vitro arterial disease modeling and therapeutic discovery. It describes the fabrication of a fibrin biomaterial scaffold seeded with iPSC‐derived smooth muscle and endothelial cells, mimicking native artery properties. Two genetic disease models showcase the platform's ability to
Danielle Yarbrough, Roy Chen, Katerina Katsouleas, Jaron Shoemaker, Travis Brady, Tianfang Yu, Jennifer Arthur Ataam, Connor Amelung, Lakshmi Santhanam, Ioannis Karakikes, Sharon Gerecht   +10 more
wiley   +1 more source

Construction and validation of a first-generation Bordetella bronchiseptica long-oligonucleotide microarray by transcriptional profiling the Bvg regulon

BMC Genomics, 2007
Background Bordetella bronchiseptica is a bacterial respiratory pathogen that infects a broad range of mammals, causing chronic and often subclinical infections.
Nicholson Tracy L
doaj   +1 more source

Multidimensional Cellular Micro‐Compartments to Model Invasive Lobular Carcinoma Dormancy

Advanced Healthcare Materials, EarlyView.
Invasive lobular carcinoma (ILC) is an understudied subtype of breast cancer that is susceptible to late recurrences. In this study, micro‐compartmentalization techniques spanning multiple dimensions, including 2D, pseudo‐3D, and 3D, are integrated to uncover the mechanisms underlying ILC dormancy, revealing the central role of p27Kip1.
Xilal Y. Rima, Sarmila Majumder, Divya S. Patel, Chunyu Hu, Hong Li, Xin Huang, Kim Truc Nguyen, Jacob Doon‐Ralls, Chiranth K. Nagaraj, Mangesh D. Hade, Setty M. Magaña, Eswar Shankar, Xiaoli Zhang, Daniel G. Stover, Bhuvaneswari Ramaswamy, Eduardo Reátegui   +15 more
wiley   +1 more source

Global Phase Portrait and Bifurcation Diagram for a Multi-Parametric Linear System

Journal of Southwest Jiaotong University, 2020
The goal of this article is to conduct a global dynamics study of a linear multiparameter system (real parameters (a,b,c) in R^3); for this, we take the different changes that these parameters present. First, we find the different parametric surfaces in which the space is divided, where the stability of the critical point is defined; we then create a ...
Jorge Rodríguez Contreras, Alberto Reyes Linero, Juliana Vargas Sánchez   +2 more
openaire   +2 more sources