Results 61 to 70 of about 1,405 (223)

An Improved Coordinate Registration for Over-the-Horizon Radar Using Reference Sources

, 2021
In the target localization of skywave over-the-horizon radar (OTHR), the error of the ionospheric parameters is one main error source. To reduce the error of ionospheric parameters, a method using both the information of reference sources (e.g., terrain ...
Zhen Guo, Yuhang Hao, Quan Pan, Hua Lan, Zengfu Wang   +4 more
core   +1 more source

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

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  

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

OTHR-11. The effects of the COVID-19 Pandemic on the time to diagnosis in pediatric patients with Primary central nervous system tumors [PDF]

, 2022
Tyler Canova, Neil L. McNinch, Alexis Judd, Sarah Rush, Erin Wright   +4 more
openalex   +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

OTHR-06. Knowledge gap among health care providers in childhood central nervous system tumors: Result from an international multicenter survey [PDF]

, 2022
Revathi Rajagopal, Daniel C. Moreira, Lane Faughnan, Huiqi Wang, Sameen Naqvi, Meenakshi Devidas, Ibrahim Qaddoumi   +6 more
openalex   +1 more source

EclipseNB: A Network of Low‐Cost GNSS Receivers to Study the Ionosphere

Space Weather, Volume 23, Issue 1, January 2025.
Abstract This work aims to demonstrate that dense networks of low‐cost dual‐frequency global navigation satellite systems (GNSS) receivers can be used to retrieve ionospheric electron content with almost the same level of accuracy as scientific‐grade GNSS receivers.
A. Kashcheyev, B. Nava, C. Watson, P. T. Jayachandran, R. B. Langley   +4 more
wiley   +1 more source

Transient Interference Suppression Algorithm Based on Time Frequency Sparse Prior for Skywave OTHR

Leida xuebao
The target detection performance of skywave Over-the-Horizon Radar (OTHR) often struggles with transient interference. To address this issue, we have developed a transient interference suppression algorithm that uses Time Frequency Sparsity Prior (TFSP).
Zirui CHEN, Yifei JI, Xiwang LIU, Yongsheng ZHANG, Zhen DONG, Alei CHEN, Weijian LIU   +6 more
doaj   +1 more source

CONSIDERATIONS REGARDING DIFFERENT APPROACHES TO MEASURING LABOR PRODUCTIVITY [PDF]

Journal of Defense Resources Management, 2011
Assessing the productivity of factors of production has been a key issue for economists for many decades, as the development and well-being of a govenrment sector, industry or company have been very early on linked to the way in which inputs are used in ...
Maria CONSTANTINESCU
doaj