Results 81 to 90 of about 1,881 (201)
Intrinsic Focus‐Like Light Concentration From Anti‐Resonant Hollow‐Core Fibers
Advanced Photonics Research, Volume 7, Issue 8, August 2026.The fundamental mode of hollow‐core waveguides is shown to produce intrinsic focus‐like light concentration in free space without external optics. Combined experiments and simulations reveal that this behavior originates from the non‐Gaussian nature of leaky modes, establishing a new mechanism for lensless beam shaping and compact optical interfacing ...
Shahrzad Hosseinabadi +3 more
wiley +1 more source
Journal of Raman Spectroscopy, Volume 57, Issue 8, Page 1359-1366, August 2026.Inter‐Theta‐Gram spectroscopy enables super‐spectral‐resolution Raman analysis by jointly reconstructing the excitation laser line and Raman peak during an etalon angle scan, yielding internally referenced Raman shifts. Demonstrated on lab‐grown versus natural diamond, it resolves 0.1–0.2 cm−1 Raman‐shift offsets that are invisible in conventional ...
Yishai Amiel +3 more
wiley +1 more source
A physics primer on photon‐counting detectors in CT: Physics, signal formation, and performance
Medical Physics, Volume 53, Issue 8, August 2026.Abstract Photon‐counting detector CT (PCD‐CT) is moving from laboratory development to clinical deployment. However, its threshold‐bin data arise from a tightly coupled detector–readout chain that can be difficult to understand as a whole. These data are not a direct readout of photon energy, but the outcome of a sequence of physical and electronic ...
Guang‐Hong Chen, Ruiran Lai, Ke Li
wiley +1 more source
Large Intelligent Surfaces Communicating Through Massive MIMO Rayleigh Fading Channels. [PDF]
Sensors (Basel), 2020 Coelho Ferreira R +4 more
europepmc +1 more source
International Journal of Robust and Nonlinear Control, Volume 36, Issue 12, Page 6047-6067, August 2026.ABSTRACT In this work, a new event‐triggered adaptive first‐order sliding mode control method is proposed for nonlinear systems with constant time delays, modeled by interval type‐2 Takagi–Sugeno (T–S) fuzzy systems. To handle matched disturbances with unknown upper bounds, a non‐overestimating adaptation strategy for the control coefficient is ...
Rodrigo Possidonio Noronha +1 more
wiley +1 more source
Comparative Analysis of Uncorrected Rayleigh Fading Channels Models
工程科学与技术, 2009 :In order to compare the complexity and performance of Sum-of-sinusoids (SoS) models for uncorrected Rayleigh fading channels, the second-order statistical formula for deterministic SoS model was derived, which showed that the variance of cross ...
Zhu Qiu-Ming
doaj
Earth and Space Science, Volume 13, Issue 8, August 2026.Abstract A set of fresh Equatorial Plasma Bubbles (EPBs) formed during pre‐sunrise hours in the Southeast Asian sector amid the recovery phase of May 2024 geomagnetic storm. They offered new insights into their formation mechanism. This study used Total Electron Content (TEC) and Rate of TEC Index maps over Indonesia, along with ionosondes in Thailand ...
Sri Ekawati +9 more
wiley +1 more source
IEEE AccessThe explosive growth of multimedia traffic over wireless networks demands robust image transmission mechanisms that maintain perceptual quality under channel impairments.
Prabhath Samarathunga +6 more
doaj +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.Abstract We present array‐scale (∼500 × 500 km) anisotropic shear‐velocity models from two Pacific ocean‐bottom seismometer (OBS) arrays of the OBS Research in the Convecting Asthenosphere (ORCA) experiment: Young ORCA (∼43 Ma) and Old ORCA (∼90 Ma). Rayleigh‐wave phase velocities spanning 5–150 s are combined with Love‐wave phase velocities from 5 to ...
Joseph H. Phillips +5 more
wiley +1 more source