Results 121 to 130 of about 8,583,864 (289)

Topological Engineering of High‐Order Exceptional Points Through Transformation Optics

Laser &Photonics Reviews, EarlyView.
A novel framework leveraging transformation optics is introduced for engineering high‐order exceptional points (EPs) in nanophotonic systems. By linking these spectral singularities to physically accessible parameters, this approach enables the design of complex EPs, including third and fourth‐order EPs in coupled nanowire systems.
Kaiyuan Wang, Qi Jie Wang, Matthew R. Foreman, Yu Luo   +3 more
wiley   +1 more source

Effect of Variations in the Ring Thickness on the Dynamic Performance of the Bimetal Gears

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This study used a six‐degrees‐of‐freedom dynamic model to analyze the dynamic response of bimetal spur gears. Aluminum alloy forms the core of the bimetal gears, and a uniform‐thickness steel ring surrounds the teeth. Gear mesh stiffness of bimetal gears and the transmission error have been assessed using a numerical approach based on finite ...
Bikramjit Singh, Pawan Kumar, S. P. Harsha   +2 more
wiley   +1 more source

Microbiome of the upper troposphere: Species composition and prevalence, effects of tropical storms, and atmospheric implications

Proceedings of the National Academy of Sciences of the United States of America, 2012
Natasha DeLeón-Rodriguez, T. Lathem, Luis M. Rodriguez-R, James M. Barazesh, B. Anderson, A. Beyersdorf, L. Ziemba, M. Bergin, A. Nenes, K. Konstantinidis   +9 more
semanticscholar   +1 more source

Ellipsoid‐Based Interval‐Type Uncertainty Model Updating Based on Riemannian Manifold and Gaussian Process Model

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Modern engineering systems require advanced uncertainty‐aware model updating methods that address parameter correlations beyond conventional interval analysis. This paper proposes a novel framework integrating Riemannian manifold theory with Gaussian Process Regression (GPR) for systems governed by Symmetric Positive‐Definite (SPD) matrix ...
Yanhe Tao, Qintao Guo, Jin Zhou, Cheng Yi   +3 more
wiley   +1 more source

Experimental Modal Analysis‐Driven Gaussian Process Regression Modeling of Rectangular Steel Beams With Various Hole Geometries

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Understanding the dynamic behavior of structural components is crucial for optimizing performance and ensuring structural integrity. This study presents a new method that combines a systematic experimental investigation of four distinct hole geometries (circular, square, compact rectangular, and long rectangular) with varying hole counts, all ...
Amir Hossein Rabiee, Majid Rajaei, Mohammad Hossein Mahdavi Nasab, Parsa Shafiei   +3 more
wiley   +1 more source

Broadband X-ray burst spectroscopy of the fast-radio-burst-emitting Galactic magnetar

Nature Astronomy, 2021
G. Younes, M. Baring, C. Kouveliotou, Z. Arzoumanian, T. Enoto, J. Doty, K. Gendreau, E. Gogus, S. Guillot, T. Guver, A. Harding, W. Ho, A. J. Horst, C. P. Hu, G. K. Jaisawal, Y. Kaneko, B. LaMarr, Lin Lin, W. Majid, T. Okajima, J. Pope, P. Ray, O. Roberts, M. Saylor, J. F. Steiner, Z. Wadiasingh   +25 more
semanticscholar   +1 more source

Stance and Gait Analysis of Apollo Astronauts on the Moon

Muscle &Nerve, EarlyView.
ABSTRACT Introduction/Aim As humans return to the Moon, safe efficient ambulation and fall prevention on the lunar surface are key concerns. The analysis of gait from archived Apollo mission video footage is now possible with pose estimation video analysis software.
Faye Y. Chiou‐Tan, Conrad Li, Jason P. Caffrey, Millard Reschke, Timothy R. Macaulay   +4 more
wiley   +1 more source

Enhanced radiative cooling by large aerosol particles from wildfire-driven thunderstorms. [PDF]

Sci Adv
Li Y, Dykema JA, Peterson DA, Feng X, Shen X, June NA, Fromm MD, McHardy TM, Jacquot JL, Pittman JV, Daube BC, Wofsy SC, Dean-Day J, Rapp AD, Bowman KP, Cziczo DJ, Mickley LJ, Pierce JR, Keutsch FN.   +18 more
europepmc   +1 more source

Low‐Velocity Impact Response of Nacre‐Inspired E‐Glass/Epoxy Composites With Varying Platelet Sizes

Polymer Composites, EarlyView.
Impact response of nacre‐inspired E‐glass/epoxy composites with different platelet sizes. ABSTRACT This study explores the low‐velocity impact behavior of nacre‐inspired biomimetic platelet composites (NIBPC), using low‐cost E‐glass fiber in chopped strand mat (CSM) form as reinforcement and epoxy resin as the matrix.
B. M. Vaghasia, N. V. Rachchh, Gaurang Joshi, Dhanesh G. Mohan   +3 more
wiley   +1 more source

Resurrected nitrogenases recapitulate canonical N-isotope biosignatures over two billion years. [PDF]

Nat Commun
Rucker HR, Bubphamanee K, Harris DF, Konhauser K, Seefeldt LC, Buick R, Kaçar B.   +6 more
europepmc   +1 more source