Results 91 to 100 of about 8,509,903 (292)
On computing inner-outer factorizations of periodic systems [PDF]
, 2013 A numerically reliable state space algorithm is proposed for computing inner-outer factorizations of causal periodic descriptor systems. The main computational ingredients are the computation of a special condensed Kronecker-like form of periodic ...
Varga, Andreas, Andreas Varga
core +1 more source
Global positive periodic solutions of periodic n-species competition systems
Journal of Mathematical Analysis and Applications, 2009 Lotka-Volterra systems have been investigated extensively for the last decades. Many results dealing with the global existence and attractivity of periodic solutions have been obtained. As an extension of the Lotka-Volterra models in 1973, a more complicated model was proposed by Gilpin and Ayala.
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Golgi enzymes are retrieved from the plasma membrane to the trans‐Golgi network
FEBS Letters, EarlyView.Golgi enzymes are traditionally considered resident proteins retained within the Golgi apparatus. Here, we demonstrate that a subset transiently reaches the cell surface and is subsequently retrieved to the trans‐Golgi network via retrograde transport. Using a nanobody‐based toolkit, we uncover a dynamic trafficking cycle of several Golgi enzymes.
Dominik P. Buser, Tina Junne
wiley +1 more source
四川大学学报. 自然科学版, 2023 In this paper we study the existence of positive solutions of periodic boundary value problem for a class of first-order ordinary differential system, the main used tool is the topological degree theory.
BO Zhi-Wei, MA Ru-Yun
doaj
Positive periodic solutions of a periodic neutral delay logistic equation with impulses
Computers & Mathematics with Applications, 2008 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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FEBS Letters, EarlyView.Obesity raises blood levels of PAI‐1, a protein linked to metabolic dysfunction‐associated steatotic liver disease in people with obesity. In female mice fed a high‐fat diet, partially lowering PAI‐1 led to smaller subcutaneous fat cells and lower liver cholesterol, without changing body weight or insulin sensitivity.
Claudia E. Ramirez Bustamante +10 more
wiley +1 more source
Existence and global attractivity positive periodic solutions for a discrete model
Electronic Journal of Differential Equations, 2006 Using a fixed point theorem in cones, we obtain conditions that guarantee the existence and attractivity of the unique positive periodic solution for a discrete Lasota-Wazewska model.
Zheng Zhou, Zhengqiu Zhang
doaj
POSITIVE PERIODIC SOLUTIONS OF SYSTEMS OF FUNCTIONAL DIFFERENTIAL EQUATIONS [PDF]
Journal of the Korean Mathematical Society, 2005 The authors study the existence of the positive periodic solutions of the functional differential equations \[ x'(t)=A(t)x(t)+\lambda f(t, x(t-\tau(t))). \] By applying a cone theoretic fixed point theorem, the authors obtain some sufficient conditions for the existence of positive periodic solutions of the above equation.
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Ligand‐dependent transcriptional heterogeneity in cell cycle gene expression delays G1/S entry
FEBS Letters, EarlyView.EGF and HRG induce distinct G1/S progression programs in ErbB2‐amplified BT474 breast cancer cells. Despite activating the potent ErbB2–ErbB3 heterodimer, HRG does not accelerate cell‐cycle entry. Instead, EGF promotes earlier restriction‐point passage via ERK–FOS signaling, whereas HRG activates the AKT–MYC axis, driving transcriptional heterogeneity ...
Ririn Rahmala Febri +5 more
wiley +1 more source
Positive periodic solutions and nonlinear eigenvalue problems for functional differential equations
Electronic Journal of Qualitative Theory of Differential Equations, 2012 This paper is devoted to investigate the existence of positive periodic solution for a functional differential equation in the form of $\lambda\mathbb{L}x=-b(t)f(x(t-\tau(t))),$ where $\mathbb{L}x=x'(t)-a(t)g(x(t))x(t)$.
Xuemei Zhang
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