Results 61 to 70 of about 2,149 (181)
Multiple periodic solutions for impulsive functional differential equations with feedback control
Electronic Journal of Differential Equations, 2011 Using the well known Leggett-Williams fixed point theorem, we study the existence of periodic solutions for a class of impulsive functional equations with feedback control. The main results are illustrated with two examples.
Peilian Guo, Yansheng Liu
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Nonlinear Analysis, 2020 In this article, together with Leggett–Williams and Guo–Krasnosel’skii fixed point theorems, height functions on special bounded sets are constructed to obtain the existence of at least three positive solutions for some higher-order fractional ...
Qiuyan Zhong +4 more
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Microbial Biotechnology, Volume 18, Issue 6, June 2025.High‐traffic areas, such as mass transportation environments, can have a significant impact on infection transmission, and chemical disinfection may favour the selection of drug‐resistant microbes. Probiotic‐based approaches have the potential to be a novel and ecologically sustainable option for controlling bioburden and preventing infections ...
Irene Soffritti +7 more
wiley +1 more source
British Journal of Educational Psychology, Volume 95, Issue 2, Page 603-626, June 2025.Abstract Background The achievement goals set by parents and teachers play a crucial role in shaping students' personal goal orientation and academic performance. Previous studies have revealed discrepancies between achievement goals set by parents and teachers.
Ningning Zhao +6 more
wiley +1 more source
Positive Solutions of Fractional Differential Equations with p-Laplacian
Journal of Function Spaces, 2017 The multiplicity of positive solution for a new class of four-point boundary value problem of fractional differential equations with p-Laplacian operator is investigated. By the use of the Leggett-Williams fixed-point theorem, the multiplicity results of
Yuansheng Tian, Sujing Sun, Zhanbing Bai
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Closing the air gap: the use of drones for studying wildlife ecophysiology
Biological Reviews, Volume 100, Issue 3, Page 1206-1228, June 2025.ABSTRACT Techniques for non‐invasive sampling of ecophysiological data in wild animals have been developed in response to challenges associated with studying captive animals or using invasive methods. Of these, drones, also known as Unoccupied Aerial Vehicles (UAVs), and their associated sensors, have emerged as a promising tool in the ecophysiology ...
Adam Yaney‐Keller +3 more
wiley +1 more source
Electronic Journal of Differential Equations, 2010 Using the Leggett-Williams multiple fixed point theorem, we establish criteria for the existence of three positive periodic solutions of a class of differential systems with feedback controls on time scales.
Yongkun Li, Tianwei Zhang, Jianfeng Suo
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Existence of positive solutions for higher order three-point boundary value problems on time scales [PDF]
, 2018 In this paper, by using the four functionals fixed point theorem, Avery-Henderson fixed point theorem and the five functionals fixed point theorem, respectively, we investigate the conditions for the existence of at least one, two and ...
Yaslan, İsmail
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Aquaculture and early life stages of the Hawaiian Potter's angelfish (Centropyge potteri)
Journal of the World Aquaculture Society, Volume 56, Issue 3, June 2025.Abstract The Potter's angelfish (Centropyge potteri), a Hawaiian endemic reef fish, has long been prized in the global aquarium trade, with approximately 9000 individuals collected annually from the wild before Hawai‘i's 2021 ban on commercial aquarium fish collection.
Kent A. Glover, Chatham K. Callan
wiley +1 more source
Multiple solutions for nonresonance impulsive functional differential equations
Electronic Journal of Differential Equations, 2003 In this paper we investigate the existence of multiple solutions for first and second order impulsive functional differential equations with boundary conditions. Our main tool is the Leggett and Williams fixed point theorem.
Mouffak Benchohra, Abdelghani Ouahab
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