Results 101 to 110 of about 1,389 (159)

Heart rate variability and autonomic function in health professions students: Associations with academic stress and lifestyle factors

Physiological Reports, Volume 14, Issue 13, July 2026.
Abstract Heart rate variability (HRV) is a non‐invasive measure of autonomic nervous system function and a sensitive marker of physiological stress. Health professions students are exposed to severe academic stress and multiple lifestyle‐related factors that may influence autonomic regulation.
Azza Alawad, Tarig Merghani, Nishaat Chowdhury, Hibat Alla Hisham   +3 more
wiley   +1 more source

Magnetically Reconfigurable Mode Strong Coupling Toward Tunable Nanophotonic Sensing Devices

Nanophotonics, Volume 15, Issue 12, 25 June 2026.
A magnetically reconfigurable metasurface realizes tunable strong coupling between structural and magneto‐structurally induced q‐BIC resonances without changing device geometry. The resulting hybrid branches enable high‐sensitivity refractive‐index sensing with noncontact active control, large figure of merit, and multiple resonance observables ...
Runmin Liu, Shengyi Wang, Liangui Deng, Hua Ge, Qiu Wang, Bowen Jia   +5 more
wiley   +1 more source

Asymptotic behaviour of massless fields and kinematic duality between interior null cones and null infinity

Journal of High Energy Physics
The relation between two branches of solutions (radiative and subradiative) of wave equations on Minkowski spacetime is investigated, for any integer spin, in flat Bondi coordinates where remarkable simplifications occur and allow for exact boundary-to ...
Xavier Bekaert, S. I. Aadharsh Raj
doaj   +1 more source

Far-Field Topological Structure of the Second Harmonic from Higher-Order Poincaré Sphere Beam

Photonics
In this paper, the far-field topological structures (FFTSs) of the second harmonic (SH) from higher-order Poincaré sphere (HOPS) beams, including circularly polarized vortex beams (VBs), cylindrically vector beams (CVBs) and elliptically polarized CVBs ...
Yangyang Li, Ziping Zhu, Yuanxiang Wang, Jiantai Dou, Li Fan, Bo Li, Youyou Hu   +6 more
doaj   +1 more source

Transmissive Terahertz Tunable and Multifunctional Polarization Manipulation With Ge/VO2 Hybrid Metasurface

Nanophotonics, Volume 15, Issue 12, 25 June 2026.
A hybrid metasurface composed of Ge dielectric pillars and a VO₂ grating is proposed, which enables functional switching between symmetric and asymmetric polarization conversion in transmission. By continuously tuning the conductivity of VO2, the structure achieves multiple dynamic controls of asymmetric transmission, circular dichroism, and ...
Xingxing Fan, Qiang Bian, Qingguo Du, Song Sun, Qin Fu, Zhengying Li, Fei Xu   +6 more
wiley   +1 more source

Phosphoryl Halogen and Hydrogen Bonding Controls the Solid‐State Structures of Aryl Halide‐Containing Phosphonates

European Journal of Inorganic Chemistry, Volume 29, Issue 17, 17 June 2026.
Intramolecular (RO)2PO→Halogen interaction versus intermolecular (RO)2PO···HOH hydrogen bonds. Although the O···I distance is shorter than the sum of the van der Waals radii of the atoms involved, there is no covalency involved in this interaction.
David Mross, Paweł Horeglad, Bastian Grabe, Wolf Hiller, Vito Lippolis, Massimiliano Arca, Klaus Jurkschat   +6 more
wiley   +1 more source

Second harmonic of higher-order Poincaré sphere beam with two orthogonal 5%MgO:PPLN crystals

APL Photonics
In this work, the second harmonic (SH) of higher-order Poincaré sphere (HOPS) beam was introduced and demonstrated with two orthogonal 5%MgO:PPLN crystals.
Qinan Jiang, Minglin Zhao, Yuanxiang Wang, Shuolin Wang, Jiantai Dou, Jun Liu, Bo Li, Youyou Hu   +7 more
doaj   +1 more source

Generation of flower high-order Poincaré sphere laser beams from a spatial light modulator. [PDF]

Sci Rep, 2016
Lu TH, Huang TD, Wang JG, Wang LW, Alfano RR.   +4 more
europepmc   +1 more source

Giant optical polarisation rotations induced by a single quantum dot spin

Nature Communications
In the framework of optical quantum computing and communications, a major objective consists in building receiving nodes implementing conditional operations on incoming photons, using a single stationary qubit. In particular, the quest for scalable nodes
E. Mehdi, M. Gundín, C. Millet, N. Somaschi, A. Lemaître, I. Sagnes, L. Le Gratiet, D. A. Fioretto, N. Belabas, O. Krebs, P. Senellart, L. Lanco   +11 more
doaj   +1 more source

The Generation and Control of Irregularly Shaped Perfect Vector Vortex Beams on Hybrid Poincaré Spheres Using All-Dielectric Metasurfaces. [PDF]

Nanophotonics
Sun X, Yang X, Tao H, Song H, Cai J, Zou J, He J, Wang J.   +7 more
europepmc   +1 more source