Results 31 to 40 of about 102,270 (207)

Enhancement of stability of metastable states in the presence of Lévy noise

open access: yesSciPost Physics
The barrier-crossing event for superdiffusion characterized by symmetric Lévy flights is analyzed. Starting from the fractional Fokker-Planck equation, we derive an integro-differential equation along with the necessary conditions to calculate the mean ...
Alexander A. Dubkov, Claudio Guarcello, Bernardo Spagnolo
doaj   +1 more source

Brain-localized CD4 and CD8 T cells perform correlated random walks and not Levy walks [version 2; peer review: 1 approved, 2 approved with reservations]

open access: yesF1000Research, 2023
Background. For survival of the organism, T cells must efficiently control pathogens invading different peripheral tissues. Whether or not such control is achieved by utilizing different movement strategies in different tissues remains poorly understood.
Barun Majumder   +3 more
doaj   +1 more source

LÉVY FLIGHTS: CHAOTIC, TURBULENT, AND RELATIVISTIC

open access: yes, 2011
Lévy flights were introduced through the mathematical investigation of the algebra of random variables with infinite moments. For many years Lévy flights remained an abstract topic in mathematics.
ZUMOFEN, GERT   +2 more
core   +1 more source

U.S. Agriculture, Biofuel Markets, and Trade: Challenges and Opportunities

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT Using an enhanced Computable General Equilibrium (CGE) model (GTAP‐BIO), this study assesses how the expansion in demand for Electric Vehicles (EVs) and the reduction in exports of agricultural products induced by trade disputes negatively affect US agriculture.
Rayan Wolf, Farzad Taheripour
wiley   +1 more source

Quantifying the Sites of Government, Commercial, and Personal Systems‐Perpetrated Financial Abuse

open access: yesAustralian Journal of Social Issues, EarlyView.
ABSTRACT This study explores the institutional systems through which post‐separation financial abuse is perpetrated. While existing measures seek to quantify the harms experienced by women post‐separation, this study draws on financial, welfare and legal service casefiles to identify where such harms occur. Drawing on 76 de‐identified Victorian service
Kay Cook   +3 more
wiley   +1 more source

Levy Flights in Metaheuristics Optimization Algorithms – A Review

open access: yesApplied Artificial Intelligence, 2018
In recent years, Levy flight (LF) is increasingly being employed as search mechanism in metaheuristics optimization algorithms (MOA) to solve complex real world problems.
Mridul Chawla, Manoj Duhan
doaj   +1 more source

Analytical Investigations into Anomalous Diffusion Driven by Stress Redistribution Events: Consequences of Lévy Flights

open access: yesMathematics, 2022
This research is concerned with developing a generalised diffusion equation capable of describing diffusion processes driven by underlying stress-redistributing type events.
Josiah D. Cleland, Martin A. K. Williams
doaj   +1 more source

Mapping Lupinus polyphyllus density and distribution along road verges using unmanned aerial vehicle (UAV)–based remote sensing

open access: yesApplications in Plant Sciences, EarlyView.
Abstract Premise Road verges function as refuges for semi‐natural species, but they can also facilitate the spread of non‐native plants such as Lupinus polyphyllus. Unmanned aerial vehicle (UAV)–based remote sensing is a promising tool for mapping these species; however, its application in roadside contexts remains limited.
Elin L. Blomqvist   +3 more
wiley   +1 more source

A beetle antennae search algorithm based on Lévy flights and adaptive strategy

open access: yesSystems Science & Control Engineering, 2020
The beetle antennae search (BAS) algorithm is a new meta-heuristic algorithm which has been shown to be very useful in many applications. However, the algorithm itself still has some problems, such as low precision and easy to fall into local optimum ...
Xin Xu, Kailian Deng, Bo Shen
doaj   +1 more source

How to Navigate Disrupted Business Models in the 21st Century: At the Crossroads of the Circular Economy and the Industry 4.0 Transition

open access: yesBusiness Strategy and the Environment, EarlyView.
ABSTRACT Our planet faces a critical crisis, with pollution, resource depletion and biodiversity loss surpassing sustainable limits. Businesses must address these challenges, with the circular economy and Industry 4.0 offering transformative potential through closed‐loop systems, regenerative solutions and advanced technologies.
Agnes Toth‐Peter   +3 more
wiley   +1 more source

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