Results 41 to 50 of about 66,497 (169)

Optimal Control Strategies and Continuous Dependence for Stochastic Hilfer Fractional Systems With Delay: A Volterra‐Fredholm Integro‐Differential Approach

Optimal Control Applications and Methods, EarlyView.
The graphical abstract highlights our research on Sobolev Hilfer fractional Volterra‐Fredholm integro‐differential (SHFVFI) control problems for 1<ϱ<2$$ 1<\varrho <2 $$. We begin with the Hilfer fractional derivative (HFD) of order (1,2) in Sobolev type, which leads to Volterra‐Fredholm integro‐differential equations.
Marimuthu Mohan Raja, V. Vijayakumar, Chun‐Wei Tsai, Kalyana Chakravarthy Veluvolu   +3 more
wiley   +1 more source

Physicochemical Necessary and Sufficient Conditions for Superferromagnetism in High‐Resolution Magnetic Particle Imaging

Small, EarlyView.
This study investigates how strong dipole–dipole coupling in linear chains of synthesized superparamagnetic nanoparticles induces superferromagnetism, enhancing Magnetic Particle Imaging (MPI) resolution. A positive feedback model predicts key magnetic behaviors, such as coercivity, and guides nanoparticle synthesis.
Chinmoy Saayujya, Benjamin Fellows, Yifeng Shi, Ruhani Sagar, Benjamin G. Cary, Jacob Bryan, Cherilyn Yu, Melissa Kim, Allison Hartley, Quincy Huynh, Prashant Chandrasekharan, Zhi Wei Tay, Michael F. Wendland, Steven M. Conolly   +13 more
wiley   +1 more source

A note in the Riemann \(\xi - \) Function

, 2019
Comment: new section ...
openaire   +2 more sources

Vortex Ratchet Effect in a NbC Strip With a Periodic Edge Indentation

Small Methods, EarlyView.
The image shows the nanoprinting of a superconducting nanostructure using focused ion beam induced deposition (top left), overlaid with numerically simulated patterns of current and magnetic flux quanta (bottom). An edge indentation breaks spatial symmetry, modifying the current density distribution and inducing nonreciprocal magnetic flux dynamics the
F. Porrati, A. O. Pokusinskyi, S. Barth, M. Huth, O. V. Dobrovolskiy   +4 more
wiley   +1 more source

Existence of solutions to nonlinear p-Laplacian fractional differential equations with higher-order derivative terms

Electronic Journal of Differential Equations, 2018
In this article, we discuss the existence of positive solution to a nonlinear p-Laplacian fractional differential equation whose nonlinearity contains a higher-order derivative $$\displaylines{ D_{0^+}^{\beta}\phi_p\big(D_{0^+}^{\alpha}u(t)\big) +f ...
You-Hui Su, Yongzhen Yun, Dongdong Wang, Weimin Hu   +3 more
doaj  

Barriers and Facilitators of Sleep Restriction Therapy in Internet‐Delivered CBT‐I: A Qualitative Content Analysis and the Development of a Treatment Path Model

Journal of Sleep Research, EarlyView.
ABSTRACT Sleep Restriction Therapy (SRT) is a core component of cognitive behavioural therapy for insomnia (CBT‐I). Yet, adherence to SRT can be a major challenge for patients. As this challenge is evident in conventional face‐to‐face therapy, it raises the question of adherence to SRT in internet‐delivered therapy.
Laura Simon, Lisa Steinmetz, Nils Berghoff, Charlotte Rehm, Lena‐Marie Neumann, Ann‐Marie Küchler, Dieter Riemann, David Daniel Ebert, Kai Spiegelhalder, Harald Baumeister   +9 more
wiley   +1 more source

A General size-biased distribution

, 2020
We generalize a size-biased distribution related to the Riemann xi function using the work of Ferrar.
Patkowski, Alexander E
core  

Change Point Analysis for Functional Data Using Empirical Characteristic Functionals

Journal of Time Series Analysis, EarlyView.
ABSTRACT We develop a new method to detect change points in the distribution of functional data based on integrated CUSUM processes of empirical characteristic functionals. Asymptotic results are presented under conditions allowing for low‐order moments and serial dependence in the data establishing the limiting null‐distribution of the proposed test ...
Lajos Horváth, Gregory Rice, Jeremy VanderDoes   +2 more
wiley   +1 more source

Debiasing piecewise deterministic Markov process samplers using couplings

Scandinavian Journal of Statistics, EarlyView.
Abstract Monte Carlo methods—such as Markov chain Monte Carlo (MCMC) and piecewise deterministic Markov process (PDMP) samplers—provide asymptotically exact estimators of expectations under a target distribution. There is growing interest in alternatives to this asymptotic regime, in particular in constructing estimators that are exact in the limit of ...
Adrien Corenflos, Matthew Sutton, Nicolas Chopin   +2 more
wiley   +1 more source

Free energy expansions of a conditional GinUE and large deviations of the smallest eigenvalue of the LUE

Communications on Pure and Applied Mathematics, Volume 78, Issue 12, Page 2247-2304, December 2025.
Abstract We consider a planar Coulomb gas ensemble of size N$N$ with the inverse temperature β=2$\beta =2$ and external potential Q(z)=|z|2−2clog|z−a|$Q(z)=|z|^2-2c \log |z-a|$, where c>0$c>0$ and a∈C$a \in \mathbb {C}$. Equivalently, this model can be realised as N$N$ eigenvalues of the complex Ginibre matrix of size (c+1)N×(c+1)N$(c+1) N \times (c+1)
Sung‐Soo Byun, Seong‐Mi Seo, Meng Yang   +2 more
wiley   +1 more source