Results 121 to 130 of about 7,979 (231)

An autonomous and economical benthic incubation chamber for measuring dissolved oxygen fluxes in shallow, low‐flow environments

Limnology and Oceanography: Methods, Volume 24, Issue 5, May 2026.
Abstract Benthic incubation chambers enclose a known volume of water overlying a known area to measure water chemistry changes and are typically used to quantify the metabolic activity of benthic organisms or communities. Here we present an economical benthic incubation chamber for shallow, low‐flow environments, built using off‐the‐shelf components ...
Luke D. Groff, Peter Berg, Karen J. McGlathery   +2 more
wiley   +1 more source

Reasons, Mistakes, and Excuses

The Modern Law Review, Volume 89, Issue 3, Page 439-466, May 2026.
Drawing on the theory of practical reasons, John Gardner has offered a seminal account of excuses in criminal law. His proposal is that an excuse asserts that the defendant acted for what she justifiably believed to be sufficient reason for her to perform the offending act although she had no such reason.
Andreas Vassiliou
wiley   +1 more source

Remote Text‐Supplemented Audiobook Intervention Supports Children's Explicit and Incidental Vocabulary Learning

Developmental Science, Volume 29, Issue 3, May 2026.
ABSTRACT Vocabulary knowledge is foundational to educational success, but significant gaps exist between students with reading disabilities or those from disadvantaged backgrounds and their peers. These gaps have cascading effects, as children with lower vocabulary knowledge are less likely to acquire new words through independent reading and are less ...
Halie A. Olson, Ola Ozernov‐Palchik, Xochitl M. Arechiga, John D. E. Gabrieli   +3 more
wiley   +1 more source

Dynamics of Double Chaos

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017
stract         This paper includes studying (dynamic of double chaos) in two steps: First Step:- Applying ordinary differential equation have behaved chaotically such as (Duffing's equation) on (double pendulum) equation system to get new system of ...
A. M. Ahmed, S. Noori
doaj  

Impact of Model Parameterisation and Variance Component Estimates on Genomic Predictions of Carcass Traits in Montana Composite Cattle

Journal of Animal Breeding and Genetics, Volume 143, Issue 3, Page 431-442, May 2026.
ABSTRACT This study evaluated the influence of variance component (VC) estimates, obtained from different models and two relationship matrices, pedigree‐based (BLUP) and genomic information‐based (ssGBLUP), on genomic predictions of carcass traits in Montana composite cattle.
Caroline Assis Almeida, Felipe Eguti de Carvalho, Flávia Cristina Bis, Rachel Santos Bueno Carvalho, Elisângela Chicaroni de Mattos, Rafael Espigolan, Joanir Pereira Eler, Luís Telo da Gama, Fernando Baldi, José Bento Sterman Ferraz   +9 more
wiley   +1 more source

Periodic Duffing equations with delay

Electronic Journal of Differential Equations, 2004
The paper is devoted to find sufficient conditions for the existence of a \(T\)-periodic solution for the Duffing equation with delay \[ x''(t)+cx'(t)+g(t-\tau, x(t-\tau), x'(t-\tau))=p(t), \] where \(c\in \mathbb{R}\), \(g\) is a continuous function and \(T\)-periodic in its first argument, and \(p\) is \(T\)-periodic.
Jean-Marc Belley, Michel Virgilio
openaire   +2 more sources

Laboratory Experiments on Savannah and European Boreal Forest Fire Emissions

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 7, 16 April 2026.
Abstract Landscape fire is among the largest sources of aerosols and trace gases globally. However, the emissions are highly variable and strongly affected by the type of biomass and combustion characteristics. We investigated the effect of combustion characteristics on the burning emissions from three biomass types: woody plants and grasses from ...
V. Vakkari, L. Vettikkat, S. Kommula, A. Mukherjee, L. Hao, J. Backman, A. Buchholz, N. Gawlitta, M. Ihalainen, K. Jaars, K. Köster, V. Le, P. Miettinen, A. Nissinen, H. Czech, M. Alton, J. Passig, S. Peltokorpi, A. A. Piedehierro, I. Pullinen, E. I. Rosewig, S. Schobesberger, D. Shukla, S. J. Siebert, M. Somero, A. Virkkula, A. Welti, P. Yli‐Pirilä, A. Ylisirniö, R. Zimmermann, P. G. van Zyl, A. Virtanen, O. Sippula   +32 more
wiley   +1 more source

Boundedness of Solutions for Semilinear Duffing Equations

Journal of Differential Equations, 1998
The paper concerns the semilinear Duffing equation \(x''(t)+\lambda^2x(t)+\phi(x(t))=e(t)\). Here, \(\phi(x)=o(x)\) as \(| x|\to+\infty\) and \(e\) is \(2\pi\)-periodic. For this equation, the main result states that all solutions are bounded and some solutions are quasi-periodic.
openaire   +2 more sources

Identification of Upper and Lower Limits of the Unstable Region of the Undamped Duffing Oscillator with Softening Stiffness

Applied Sciences
The study concerns the Duffing oscillator (Duffing equation) with softening stiffness. Using numerical simulations, the upper and lower limits of the unstable region for damping equal to 0 were identified, and analytic formulas describing them were ...
Wojciech Wawrzynski
doaj   +1 more source

Research on the Threshold Determination Method of the Duffing Chaotic System Based on Improved Permutation Entropy and Poincaré Mapping. [PDF]

Entropy (Basel), 2023
Zhou J, Li Y, Wang M.
europepmc   +1 more source