Results 51 to 60 of about 85,942 (221)
Compact Spectral Imaging: A Review of Miniaturized and Integrated Systems
Laser &Photonics Reviews, EarlyView.This review explores the rapid shift toward compact spectral imaging systems by examining four key design paradigms: Do‐It‐Yourself (DIY) platforms, freeform optics, filter‐on‐chip integration, and multifunctional metasurfaces. The discussion highlights critical applications in medicine, agriculture, and environmental monitoring, providing comparative ...
Sani Mukhtar, Amir Arbabi, Jaime Viegas
wiley +1 more source
Mathematical Methods in the Applied Sciences, EarlyView.ABSTRACT We analyze nonlinear degenerate coupled partial differential equation (PDE)‐PDE and PDE‐ordinary differential equation (ODE) systems that arise, for example, in the modelling of biofilm growth. One of the equations, describing the evolution of a biomass density, exhibits degenerate and singular diffusion.
K. Mitra, S. Sonner
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Mathematical Methods in the Applied Sciences, EarlyView.ABSTRACT In this paper, we introduce bivariate modified sampling Kantorovich operators, which extend the classical sampling Kantorovich operators by incorporating a transformation function ρ$$ \rho $$. The paper begins by presenting essential definitions, including to introduce new bivariate weighted modulus of continuity, and its fundamental ...
Metin Turgay, Tuncer Acar
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Magnetic Resonance in Medicine, EarlyView.Abstract Purpose Gadoxetic acid‐enhanced hepatobiliary phase T1‐weighted (T1w) MRI is effective for the detection of focal liver lesions but lacks sufficient T1 contrast to distinguish benign from malignant lesions. Although the addition of T2, diffusion, and dynamic contrast‐enhanced T1w imaging improves lesion characterization, these methods often do
Yavuz Muslu +7 more
wiley +1 more source
Journal of Polymer Science, EarlyView.Initiator concentration increases front velocity, cure kinetics, and Tg in DCPD‐co‐DHF, while increased DHF inhibits the reaction and impacts thermoset deconstructibility.This effort develops an empirical kinetic model for front speed, expands the viable compositional space for regenerative thermoset manufacturing, and correlates DSC thermograms with ...
Saurabh Vijay Bagare +4 more
wiley +1 more source
Evaluation of video evidence of possible ball lightning
Quarterly Journal of the Royal Meteorological Society, EarlyView.We analyze images of possible ball lightning that appeared less than 10 m from a video camera. The objects' velocity and estimated brightness all agree with typical eyewitness accounts of ball lightning. Though there is an alternative explanation that the objects were sparks from a power‐line arc, we describe analytical techniques that assist in ...
K. Stephan, R. Sonnenfeld, J. Bertoloni
wiley +1 more source
Delayed High Order Sliding Mode Control Using Implicit Lyapunov Function Approach
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT This article presents a novel delayed high‐order sliding mode control strategy supported by dedicated mathematical tools. Building on the implicit Lyapunov–Razumikhin function method for establishing accelerated (hyperexponential) stability in time‐delay systems and the design of high‐order sliding mode controls for chain of integrators, we ...
Moussa Labbadi, Denis Efimov
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The role of identification in data‐driven policy iteration: A system theoretic study
International Journal of Robust and Nonlinear Control, EarlyView.Abstract The goal of this article is to study fundamental mechanisms behind so‐called indirect and direct data‐driven control for unknown systems. Specifically, we consider policy iteration applied to the linear quadratic regulator problem. Two iterative procedures, where data collected from the system are repeatedly used to compute new estimates of ...
Bowen Song, Andrea Iannelli
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River Research and Applications, EarlyView.ABSTRACT This study employs two measures of connectivity, valley confinement index (VCI) and effective catchment area (ECA), combined with a field survey of active sediment sources (ASS) to unravel the tributary‐trunk sedimentary links in the 42.5 km long inter‐dam reach of the Dyje River, Czech‐Austrian border.
Zdeněk Máčka +5 more
wiley +1 more source
Remote Sensing in Ecology and Conservation, EarlyView.Birds are commonly used as indicators of the effect of habitat degradation on biodiversity in the tropics. However, monitoring birds and their habitat in a way that is consistent, reliable and scalable remains an important challenge. Here, we examine whether bioacoustics and remote sensing can be used to efficiently monitor avian biodiversity and ...
Marius Somveille +10 more
wiley +1 more source