Results 41 to 50 of about 1,166 (180)

Time Synchronisation for Passive Bistatic HFSWR via Kalman‐Filtered Delay‐Locked Loop

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This paper proposes a per‐chirp time synchronisation method, FLOS‐Kalman‐DLL, for passive bistatic high‐frequency surface wave radar (HFSWR) operating under the coexistence of clock drift and atmospheric impulsive noise. The method combines fractional lower‐order statistics with a Kalman‐filtered delay‐locked loop to achieve sub‐sample synchronisation ...
Yuan Lu, Jie Song, Wei Xiong, Yaqi Cui
wiley   +1 more source

Pandemic‐induced changes in food acquisitions: Implications for child diet quality in the United States

American Journal of Agricultural Economics, Volume 108, Issue 1, Page 363-382, January 2026.
Abstract We estimate how the COVID‐19 pandemic altered school‐aged children's diet quality from March 2020 to July 2022 through the lens of food acquisitions. Because nationally representative food‐consumption data are absent during this time, we use several data sources to predict changes in diet quality. We first estimate a model of diet quality as a
Travis A. Smith, Joanne Guthrie, Biing‐Hwan Lin, Alexander Stevens   +3 more
wiley   +1 more source

An Efficient Multi-Path Multitarget Tracking Algorithm for Over-The-Horizon Radar

Sensors, 2019
In target tracking environments using over-the-horizon radar (OTHR), one target may generate multiple detections through different signal propagation paths.
Yuan Huang, Yifang Shi, Taek Lyul Song
doaj   +1 more source

ENSO‐Driven Variability in Ozone Sources and Its Impact on Tropospheric Ozone Radiative Forcing

Geophysical Research Letters, Volume 52, Issue 15, 16 August 2025.
Abstract Ozone is the third strongest anthropogenic greenhouse gas with highest radiative efficiency in the tropical upper troposphere. Variability driven by El Niño‐Southern Oscillation (ENSO) modulates tropospheric column ozone instantaneous radiative forcing (TCO‐IRF) through changes in atmospheric dynamics, natural emissions, and stratospheric ...
Arman Pouyaei, Paul Ginoux, Vaishali Naik, Jing Feng, Larry W. Horowitz, Fabien Paulot   +5 more
wiley   +1 more source

Use of adaptive non-causal transmit beamforming in OTHR: Experimental results

, 2008
Copyright © 2008 IEEEWe report results from an experiment that applied multiple-input multiple-output (MIMO) waveform techniques to over-the-horizon radar (OTHR).
Frazer, G., Y. I. Abramovich, Abramovich, Y., Johnson, B., G. J. Frazer, B. A. Johnson   +5 more
core   +1 more source

Technical Analyses of the Interference Effect of “Advanced Radar”

Journal of Measurement Science and Instrumentation, 2010
The conception of "advanced radar" is introduced and put forward,while it is proved that the weakpoints of interference can still be employed.Meanwhile,the paper expounds the principle how Over-The-Horizon Radar（OTHR）works,and derives the OTHR ...
Xi-xiang ZHANG1, Zhong-jie ZHANG2
doaj  

Liver Fat Fraction and Machine Learning Improve Steatohepatitis Diagnosis in Liver Transplant Patients

NMR in Biomedicine, Volume 38, Issue 7, July 2025.
Machine learning identifies liver fat fraction (FF) measured by 1H MR spectroscopy, insulinemia, and elastography as robust, non‐invasive biomarkers for diagnosing steatohepatitis in liver transplant patients, validated through decision tree analysis.
Milan Hajek, Petr Sedivy, Martin Burian, Irena Mikova, Pavel Trunecka, Dita Pajuelo, Monika Dezortova   +6 more
wiley   +1 more source

OTHR-25 Germline Mutations in Pediatric Brain Tumor

Neuro-Oncology, 2022
Abstract BACKGROUND: The exploration of germline mutations in pediatric brain tumor is helpful to improve the understanding of tumor genesis, guide the treatment, and provide genetic counseling for patients and their families. METHODS: In this study, children with primary brain tumor aged ≤18 years old in Guangdong Sanjiu Brain Hospital ...
Shaoqun Li, Mingyao Lai, Linbo Cai
openaire   +1 more source

Amyloid PET predicts longitudinal functional and cognitive trajectories in a heterogeneous cohort

Alzheimer's &Dementia, Volume 21, Issue 3, March 2025.
Abstract INTRODUCTION Amyloid positron emission tomography (PET) is increasingly available for diagnosis of Alzheimer`s disease (AD); however, its practical implications in heterogenous cohorts are debated. METHODS Amyloid PET from 890 National Alzheimer`s Coordinating Center participants with up to 10 years post‐PET follow up was analyzed.
Kyan Younes, Emily Johns, Christina B. Young, Gabriel Kennedy, Shubhabrata Mukherjee, Hillary A. Vossler, Joseph Winer, Karly Cody, Victor W. Henderson, Kathleen L. Poston, Tobey J. Betthauser, Bill Bevis, William M. Brooks, Jeffrey M. Burns, Stephen A. Coombes, Charles DeCarli, Frank P. DiFilippo, Ranjan Duara, Audrey P. Fan, Laura E. Gibbons, Todd Golde, Sterling C. Johnson, Rebecca J. Lepping, James Leverenz, Sean McDougall, Emily Rogalski, Elizabeth Sanders, Joshua Pasaye, Jaiashre Sridhar, Andrew J. Saykin, Anjali Sridharan, Russell Swerdlow, Emily H. Trittschuh, David Vaillancourt, Eric Vidoni, Wei‐en Wang, Jesse Mez, Timothy J. Hohman, Duygu Tosun, Sarah Biber, Walter A. Kukull, Paul K. Crane, Elizabeth C. Mormino   +42 more
wiley   +1 more source

Comparative population genomics of manta rays has global implications for management

Molecular Ecology, Volume 34, Issue 4, February 2025.
Abstract Understanding population connectivity and genetic diversity is of fundamental importance to conservation. However, in globally threatened marine megafauna, challenges remain due to their elusive nature and wide‐ranging distributions. As overexploitation continues to threaten biodiversity across the globe, such knowledge gaps compromise both ...
Emily Humble, Jane Hosegood, Gary Carvalho, Mark de Bruyn, Simon Creer, Guy M. W. Stevens, Amelia Armstrong, Ramon Bonfil, Mark Deakos, Daniel Fernando, Niv Froman, Lauren R. Peel, Stephen Pollett, Alessandro Ponzo, Joshua D. Stewart, Sabine Wintner, Rob Ogden   +16 more
wiley   +1 more source