Results 71 to 80 of about 3,607 (229)
Wall stabilization and the Mathieu–Hill equations
Physics of Plasmas, 2002 In a recent publication [H. Tasso and G. N. Throumoulopoulos, Phys. Lett. A 271, 413 (2000)] on Lyapunov stability of general mechanical systems, it is shown that “parametric excitations” can be stabilized by dissipation for positive potential energies. Specializing on the damped Mathieu equation permits one to establish its full stability chart. It is
Tasso, H., Throumoulopoulos, G.
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Nonlinear Mathieu Equation and its Approximation Without a Small Parameter
Engineering Transactions, 2015 In this paper, the linear and nonlinear Mathieu equations without a small parameter are considered, which cannot be solved by the perturbation techniques.
Ji-Huan He
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Respirology, EarlyView.We tested the respective effect of high‐flow and supplemental O2 from nasal high‐flow O2 therapy (NHFO2) on dyspnea and exercise tolerance in fibrotic interstitial lung disease. Supplemental O2 and NHFO2 (but not high‐flow) provided improvements in these outcomes at “iso‐O2 saturation” due to reduced ventilatory requirements.
Sarah Thivent +4 more
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MathematicsWe investigate solutions of the classical Mathieu–Hill (MH) equation that characterizes the dynamics of trapped ions. The analytical model we introduce demonstrates the equations of motion are equivalent to those of a harmonic oscillator (HO).
Bogdan M. Mihalcea
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Wildlife Biology, EarlyView.Renewable energy is vital for reducing carbon emissions and yet its infrastructure poses challenges to biodiversity. While the impacts of wind power on bats and raptors are well‐studied, the effects on elusive species remain largely unknown. The Eurasian woodcock Scolopax rusticola, a nocturnal forest bird, performs characteristic courtship flights at ...
Jan O. Engler +6 more
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Monitoring wildlife using long‐endurance solar‐electric UAVs
Wildlife Biology, EarlyView.This report discusses the effectiveness of using small solar‐electric UAV (uncrewed aerial vehicles) for aerial wildlife monitoring. We review four years of aerial wildlife monitoring missions using a 5.5‐m wingspan, solar‐electric UAV that was equipped with a gimballed IR/RGB camera.
Götz Bramesfeld +3 more
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Wildlife Biology, EarlyView.Wildlife research has benefitted from the development of new methods that allow data to be collected remotely, with less disturbance to focal animals. The proliferation of livestreaming webcams, for example, those used by nature reserves for public engagement purposes, have offered new possibilities for the study of wildlife behaviour.
Kevin A. Wood +2 more
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Understanding mammal avoidance of human settlements
Journal of Animal Ecology, EarlyView.Terrestrial mammals often avoid human settlements, but is this a result of human activity around buildings or the built infrastructure per se? Using data on animal movement before and during the COVID‐19 lockdowns, this paper disentangles these effects, showing how changes in human mobility affect animals' avoidance of buildings. Abstract Anthropogenic
Jonathan R. Potts +75 more
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Marriage, Wealth, and the Spread of Cohabitation in Canada
The British Journal of Sociology, EarlyView.ABSTRACT Research demonstrates a robust link between marriage and wealth. Wealth facilitates marriage, which then fosters wealth accumulation, resulting in significant net worth disparities between married and cohabiting couples. Does the decline of marriage and growth of cohabitation alter this relationship?
Maude Pugliese
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Simulation of electromagnetic wave scattering on hollow structures with elliptical cross section
Вестник Дагестанского государственного технического университета: Технические наукиObjective. The aim of the study is to solve a problem aimed at assessing the characteristics of electromagnetic wave scattering on hollow structures whose dimensions belong to the resonant region.Method.
V. V. Garbuzov, A. P. Preobrazhensky
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