Results 51 to 60 of about 8,969 (223)

Global Bottomside Ionospheric Modeling Based on GNSS‐RO Observations From the Tianmu‐1 Constellation

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Radio occultation (RO) observations provide a crucial means for estimating the global Vertical Bottomside Electron Content (VBEC) in the ionosphere. However, the limited number of low Earth orbit (LEO) satellites in existing RO missions restricts the capability for high‐precision reconstruction of global VBEC spatiotemporal variations.
Linghuo Jian, Xiaodong Ren, Yingchuan Yang, Xuan Le, Xiaohong Zhang   +4 more
wiley   +1 more source

A Refinement Method of Real-Time Ionospheric Model for China

Remote Sensing, 2020
Ionospheric delay is a crucial error source and determines the source of single-frequency precise point positioning (SF-PPP) accuracy. To meet the demands of real-time SF-PPP (RT-SF-PPP), several international global navigation satellite systems (GNSS ...
Yang Wang, Yibin Yao, Liang Zhang, Mingshan Fang   +3 more
doaj   +1 more source

The prevalence and characterization of verotoxin-producing Eschericha coli isolated from cattle and pigs in an abattoir in Hong Kong [PDF]

, 2001
The aim of the study was to define the prevalence of verotoxin-producing Escherichia coli (VTEC) in cattle and pigs in a Hong Kong abattoir. Faecal and carcass samples collected from 986 cattle and 487 pigs from an abattoir were tested for verotoxin (VT)
Leung, PHM, Ng, WWS, Peiris, JSM, Yam, WC   +3 more
core   +1 more source

Quasi‐4‐Day Waves During the 2018/2019 SSW and Their Coupling to the Ionosphere Based on Whole Atmosphere Data Assimilation

Space Weather, Volume 24, Issue 3, March 2026.
Abstract A strong westward zonal wavenumber‐2 quasi‐4‐day wave (Q4DW) during the 2018/2019 Northern Hemisphere sudden stratospheric warming (SSW) is both captured by Aura Microwave Limb Sounder (MLS) observations and our new whole neutral atmosphere data assimilation system.
Wenxuan Wang, Xiankang Dou, Sheng‐Yang Gu, Yusong Qin, Yuxuan Liu, Hao Chen, Bao Zhang   +6 more
wiley   +1 more source

Mapping Ethiopian ionosphere using ground-based GPS TEC

Cogent Engineering, 2022
The objective of this paper is to map regional ionospheric Total Electron Content (vTEC) using Global Positioning System (GPS) data from 10 different GPS receiver sites in Ethiopia, to capture ionospheric phenomena (such as storm effect, Equatorial ...
Seydie Mebrie, Tsegaye Kassa
doaj   +1 more source

Ionospheric disturbances around the time of the Ms7.0 Lushan earthquake [PDF]

, 2013
:Variations of Vertical Total Electron Content (VTEC) in the ionosphere are investigated around the time of the Ms7. 0 Lushan earthquake. A time-series analysis shows an anomalous VTEC increase 15 days before as well as some anomalous VTEC decreases 5 ...
Yiyan, Zhou, Yun, Wu, Jian, Yang, Fuying, Zhu, Bin, Zhao   +4 more
core   +2 more sources

PPP‐RTK Atmospheric Correction Generation and Service Applicability: A Case Study During Typhoon Saola and Moderate Geomagnetic Disturbances in Hong Kong

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Complex space weather, such as typhoons and solar activity, can cause heavy rainfall and ionospheric disturbances, affecting the quality of Global Navigation Satellite System (GNSS) signals. Among GNSS positioning techniques, Precise Point Positioning Real‐time Kinematic (PPP‐RTK) uses atmospheric corrections and bias products to achieve fast ...
Jiahuan Hu, Xuanyu Qu, Pan Li, Mengyu Ding, Jiadi Dai, Xiaoli Ding, Wu Chen   +6 more
wiley   +1 more source

Modern approaches to the prevention of venous thromboembolic complications in patients with active cancer

Атеротромбоз, 2023
Cancer is one of the most significant risk factors for venous thromboembolic complications (VTEC), which combines deep vein thrombosis and pulmonary embolism. Of the many well-known risk factors for VTEC, only cancer is associated with a 4-fold increased
Yu. A. Fedotkina, E. P. Panchenko
doaj   +1 more source

Fast event-based epidemiological simulations on national scales

, 2016
We present a computational modeling framework for data-driven simulations and analysis of infectious disease spread in large populations. For the purpose of efficient simulations, we devise a parallel solution algorithm targeting multi-socket shared ...
Bauer, Pavol, Engblom, Stefan, Widgren, Stefan   +2 more
core   +1 more source

Effects of Micropore Size Distribution in Carbonate Apatite Honeycomb Granules on Bone Replacement

Journal of Biomedical Materials Research Part A, Volume 114, Issue 2, February 2026.
Bone regeneration capacity of two carbonate apatite honeycombs with identical porosity but different pore size distributions. ABSTRACT Successful bone defect repair requires understanding both the role of micropores smaller than 10 μm and that of macropores.
Koichiro Hayashi, Ryo Kishida, Kunio Ishikawa   +2 more
wiley   +1 more source