Results 21 to 30 of about 97 (96)

TWDM-PON With Signal Remodulation and Rayleigh Noise Circumvention for NG-PON2

IEEE Photonics Journal, 2013
We propose and demonstrate a 40-Gb/s (4 × 10 Gb/s) downstream and 10-Gb/s (4 × 2.5 Gb/s) upstream time-wavelength-division-multiplexed passive optical network (TWDM-PON) using signal remodulation. Here, a downstream differential-phase-shift-
C. W. Chow, C. H. Yeh, K. Xu, J. Y. Sung, H. K. Tsang   +4 more
doaj   +1 more source

Analysis of Spontaneous Raman and Rayleigh Scatterings in Distributed Fiber Raman Amplification Systems Based on a Random Distribution Model

IEEE Photonics Journal, 2017
The properties of light wave propagation with stochastic scattering in a fiber are particularly attractive because of their influence in various applications.
Qiguang Feng, Wei Li, Liyan Huang
doaj   +1 more source

Siliceous sponges or seawater as a silicon source? Tracing silicon burial pathways of the Upper Cretaceous opal‐CT deposits using δ30Si and δ7Li

Sedimentology, EarlyView.
ABSTRACT Classical models of formation of sedimentary siliceous rocks (flint, chert, opoka) commonly assume that the Cretaceous marine silicon (Si) cycle was primarily biologically controlled, broadly analogous to the modern ocean. In this framework, siliceous sponges are regarded as the principal source of dissolved silica (dSi) to sediment porewaters,
Agata Jurkowska, Ewa Świerczewska‐Gładysz, Marek Szczerba, Tomáš Magna, Szymon Kowalik Filipowicz   +4 more
wiley   +1 more source

Co‐Localized Multimodal Imaging of Polymer Ring‐Banded Spherulites Using an AFM‐Raman System

Macromolecular Chemistry and Physics, Volume 227, Issue 18, 29 September 2026.
A newly developed co‐localized AFM‐Raman system integrates polarized optical microscopy, atomic force microscopy, and polarized Raman spectroscopy to analyze poly(ethylene adipate) ring‐banded spherulites. By combining topographical and chemical‐orientational details at the exact same location, this multimodal platform provides definitive spectroscopic
Yasushi Maeda, Koichi Matsuo, Atsushi Matsumoto, Shinji Sugihara   +3 more
wiley   +1 more source

Asymmetric Ilmenite‐Bearing Cumulates Triggered Lunar Dichotomic Volcanism on the Nearside and Farside

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract The cause of the observed mare basalt asymmetry between the lunar nearside and farside remains a long‐lasting conundrum. In this study, we characterized the petrology and geochemistry of the Chang'e‐6 low‐Ti basalts from the lunar farside, performed petrological modeling of major elements and conducted Monte Carlo simulation of trace elements,
Ziqing Li, Mengfan Zhang, Bo Zhang, Yuqi Qian, Tao Long, Xiaochao Che, Ao Su, James W. Head   +7 more
wiley   +1 more source

Ductile Extrusion Triggered by Continental Collision in NE Brazil

Terra Nova, Volume 38, Issue 4, Page 266-277, August 2026.
ABSTRACT The Borborema Province in northeastern Brazil hosts one of the world's largest strike‐slip shear zone networks, active during the late Neoproterozoic assembly of West Gondwana. Whether these shear zones initiated during active continental collision or as a post‐orogenic response to far‐field stresses remains debated.
L. R. Tesser, C. E. Ganade, C. R. Cioffi, J. B. Forshaw, M. Hueck, E. Celis, M. A. S. Basei   +6 more
wiley   +1 more source

Short- to Long-Reach WDM Access Network With Free Space Optical Traffic Link

IEEE Photonics Journal
In this paper, we demonstrate a free space optical (FSO) wavelength-division-multiplexing passive optical network (WDM-PON) architecture with short-reach to long-reach fiber transmission to overcome different environments and geographical restrictions ...
Chien-Yu Liao, Tsu-Hsin Wu, Chien-Hung Yeh, Wen-Paio Lin, Yu-Heng Lin, Shien-Kuei Liaw   +5 more
doaj   +1 more source

Effect of Body Composition and Age on the Subjective and Quantitative Ultrasound Appearance of the Dogs’ Pancreas

Veterinary Radiology &Ultrasound, Volume 67, Issue 4, July 2026.
ABSTRACT Ultrasound assessment of the pancreas in dogs is limited by operator subjectivity and technical variability, particularly when classifying echotexture and echogenicity. This prospective study evaluated quantitative ultrasonographic features of the pancreas in dogs and examined their associations with subjective ultrasonographic features, age ...
Robert B. S. Turner, Simon M. Firestone, Frank R. Dunshea, Caroline Mansfield   +3 more
wiley   +1 more source

Multiple Scattering Suppression in Heterogeneous Media: High‐Precision Imaging of Sleeve Grouting Defects Based on Elastic Reverse Time Migration

Engineering Reports, Volume 8, Issue 6, June 2026.
This study proposes an elastic wave reverse time migration (RTM) method to suppress multiple scattering noise in heterogeneous concrete. By effectively utilizing scattered wavefields, RTM enables high‐precision, robust imaging of sleeve grouting defects in prefabricated buildings, significantly outperforming traditional algorithms.
Yong Lu, Li Tian, Sheng Yuan, Jing Zhang
wiley   +1 more source

A Numerical Study of the Effects of Density Contrast on Flow, Turbulence, and Mixing at the Negro/Solimoes Confluence, Brazil

Water Resources Research, Volume 62, Issue 5, May 2026.
Abstract Eddy‐resolving numerical simulations are conducted to investigate the effects of density contrast between the confluent flows on hydrodynamics, coherent structures and mixing downstream of the confluence between the Negro and Solimões Rivers, Brazil, which is characterized by both a large discharge (>100,000 m3/s) and a large aspect‐ratio (W/D 
C. Jiang, M. Koken, G. Constantinescu, C. Gualtieri   +3 more
wiley   +1 more source