Results 201 to 210 of about 36,924 (279)

A Radar-Based Contactless System for Joint Phonocardiogram Reconstruction and Cardiac State Segmentation Using a Self-Attention 1D U-Net. [PDF]

Sensors (Basel)
Montanari G, Mura M, Di Viesti P, Vignoli E, Guerzoni G, Vitetta GM.   +5 more
europepmc   +1 more source

Broadband Directional Thermal Radiation with Asymmetric Femtosecond Laser‐Processed Surfaces

Advanced Optical Materials, EarlyView.
Femtosecond laser processing is used to scalably create self‐organized angled microstructures which exhibit highly directional emissivity that occurs for all polarizations. Laser parameters are tuned to alter the surface features, control the direction of emission, and enhance the directional emissivity. Electromagnetic modeling is performed to analyze
Andrew Butler, Andrew Reicks, Jack Schulz, Patrick Hayden, Alireza Kalantari Dehaghi, Kira Marr, Linxiao Zhu, Christos Argyropoulos, Craig Zuhlke   +8 more
wiley   +1 more source

Towards Interpretable Seizure Detection: An Excitation/Inhibition Dynamic Polynomial Network Framework for Electroencephalography. [PDF]

Sensors (Basel)
Sun X, Yan Y, Liu N, Fang S, Cai J, Wu EQ, Song A, Xu J.   +7 more
europepmc   +1 more source

Thickness‐Dependent Infrared Emissivity of Ultrathin Freestanding MoSiN Nanocomposite Membranes

Advanced Optical Materials, EarlyView.
ABSTRACT Metals and dielectrics show opposite trends in thickness‐dependent infrared emissivity: metallic films exhibit a rise in emissivity below a critical thickness, while dielectric films show a corresponding decline. For applications demanding both high emissivity and mechanical strength in membranes with nanoscale thickness, combining these ...
Reethu Sebastian, Amrid Amnache, Nadi Braidy, Luc G. Fréchette   +3 more
wiley   +1 more source

Continuously trapped matter-wave interferometry in magic Floquet-Bloch band structures. [PDF]

Nat Commun
Chai X, Nolasco-Martinez E, Liang X, Tanlimco JL, Simmons EQ, Zhu E, Sajjad R, Mas H, Halawani SN, Cao A, Weld DM.   +10 more
europepmc   +1 more source

On‐Chip Saturated Absorption of CO2 in a Silicon‐on‐Sapphire Waveguide

Advanced Optical Materials, EarlyView.
We demonstrate the first saturated absorption of a molecular gas on a planar photonic chip. By coupling carbon dioxide with the tightly confined light of a silicon‐on‐sapphire waveguide, we achieve optical saturation using only milliwatt powers. This breakthrough provides a practical, low‐power foundation for creating ultra‐compact mid‐infrared ...
Shahar Edelstein, Noa Mazurski, Uriel Levy   +2 more
wiley   +1 more source

Tau pathology reprograms glucose metabolism to support cortical hyperexcitability, excitatory/inhibitory imbalance, and sleep loss. [PDF]

NPJ Dement
Irmen RE, Turner SM, Snipes JA, Schloss KH, Wang X, Williams HC, Velmurugan GV, Hunt JB, Li J, Sullivan PG, Lee DC, Bauer AQ, Johnson LA, Macauley SL.   +13 more
europepmc   +1 more source

Can Amplitude–phase Imbalance Compensator of CW Doppler Radar Receiver Be Considered Indispensable?

In conventional continuous-wave (CW) Doppler radar receivers, the amplitude-phase imbalance (API) compensator has long been deemed mandatory to eliminate inherent radio frequency signal mismatches before Doppler signal demodulation. In this work, we validate that high-accuracy Doppler information can be directly acquired by a well-designed downstream ...
Tang, Chengyao, Dai, Yongpeng, Jin, Tian
openaire   +1 more source

Revealing the Transmission Hologram's Refractive Index Profile Stored in a Photohydrogel: A Structural Characterization

Advanced Optical Materials, EarlyView.
A theoretical model is developed to visualize three‐dimensional refractive index profiles in transmission holographic gratings. In this work, it is applied to photopolymerizable hydrogels, enabling detailed analysis of the internal structure of recorded holograms and their evolution under different degradation conditions.
Belén Nieto‐Rodríguez, Manuel G. Ramírez, José Carlos García‐Vázquez, Tomás Lloret, Inmaculada Pascual   +4 more
wiley   +1 more source

Fast Analysis of Multilayer Micro-Machined Coupler Based on Mode-Matching Method. [PDF]

Micromachines (Basel)
Li S, Zhao Y, Gu H, Yang S, Zhu Z, Duan C, Wang T, Jin S, Wang C, Shao W, Ding J.   +10 more
europepmc   +1 more source