Results 41 to 50 of about 8,969 (223)

Analysis of Ionospheric VTEC Retrieved from Multi-Instrument Observations

Atmosphere
This study examines the Vertical Total Electron Content (VTEC) estimation performance of multi-instruments on a global scale during different ionospheric conditions. For this purpose, GNSS-based VTEC data from Global Ionosphere Maps (GIMs), COSMIC (F7/C2)
Gurkan Oztan, Huseyin Duman, Salih Alcay, Sermet Ogutcu, Behlul Numan Ozdemir   +4 more
doaj   +1 more source

xTAG Luminex multiplex assay for rapid screening of verocytotoxin-producing Escherichia coli strains

Romanian Journal of Laboratory Medicine, 2018
The O26 verocytotoxin-producing Escherichia coli (VTEC)-associated outbreak of hemolytic uremic syndrome (HUS) cases in Romania during 2016 showed the need to improve the current methodology of non-O157 VTEC detection and surveillance.
Oprea Mihaela, Usein Codruța-Romanița
doaj   +1 more source

Frequency and risk factors of venous thromboembolic complications in patients with active pulmonary tuberculosis and HIV/TB co-infection (tuberculosis and thrombosis) [PDF]

Srpski Arhiv za Celokupno Lekarstvo
Introduction/Objective. Venous thromboembolism complications (VTEC) include: deep vein thrombosis, superficial vein thrombosis and pulmonary embolism.
Plotkin Dmitriy, Titomer Artur, Reshetnikov Mikhail, Gafarov Umedzhon, Sterlikov Sergey, Sinitsyn Mikhail, Bogorodskaya Elena   +6 more
doaj   +1 more source

Sudden Ionospheric Disturbances Generated by Solar Flares—Not so Sudden?

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract It is known that solar flares generate instantaneous ionization enhancement, referred to as sudden ionospheric disturbance (SID), that occurs simultaneously across the entire dayside. In this work, we use high‐rate 1‐s data of total electron content (TEC) to analyse ionospheric response to 13 solar flares that occurred in 2003–2023.
B. Maletckii, E. Astafyeva, N. M. Pedatella, L. Qian   +3 more
wiley   +1 more source

Wavelet analysis of the ionospheric response at mid-latitudes during the April 200 storm using magnetograms and vTEC from GPS [PDF]

, 2013
In this work we pursue the idea of computing a parameter that allows us to estimate the local ionospheric response to a geospheric event that triggers an ionospheric storm. For that, wavelet technique has been chosen because of its ability to analyze non-
Fernandez, Laura Isabel, Meza, Amalia Margarita, Van Zele, Maria Andrea   +2 more
core  

Revisiting the STEC Testing Approach: Using espK and espV to Make Enterohemorrhagic Escherichia coli (EHEC) Detection More Reliable in Beef [PDF]

, 2016
Current methods for screening Enterohemorrhagic Escherichia coli (EHEC) O157 and non-O157 in beef enrichments typically rely on the molecular detection of stx, eae, and serogroup-specific wzx or wzy gene fragments.
Beutin, Lothar, Billet, Isabelle, Chaves, Byron D., Delannoy, Sabine, Delaval, Jose, Fach, Patrick, Ison, Sarah A., Webb, Hattie E.   +7 more
core   +3 more sources

A High‐Accuracy TEC Model for Low‐Mid Latitudes Using a BWO‐Optimized CNN‐xLSTM Hybrid Model With Multi‐Instrument Data Fusion

Space Weather, Volume 24, Issue 4, April 2026.
Abstract The total electron content (TEC) in the ionosphere is strongly affected by solar activity and geomagnetic disturbances in mid‐ and low‐latitude regions, making it a major source of error in GNSS navigation and communication systems. To improve the prediction accuracy of ionospheric TEC, this study proposes a deep learning model—Beluga Whale ...
Wang Li, Jitong Li, Jiale Li, Guanyu Chen, Dongsheng Zhao, Longjiang Li, Xiaoqing Zuo, Kefei Zhang   +7 more
wiley   +1 more source

Variation of Total Electron Content (TEC) in the Quite and Disturbed days and their correlation with Geomagnetic Parameters of Lamjung Station in the year of 2015

Bibechana, 2020
Total Electron content is measured using a dual frequency GPS receiver in Lamgung (LMJG) Station located at 84.57° longitude and 28.17° latitude of the year 2015 as it is considered as geo-magnetically active year.
Basu Dev Ghimire, Narayan Prasad Chapagain, Vardhan Basnet, Karan Bhatta, Balaram Khadka   +4 more
doaj   +3 more sources

Transmission and quantification of verocytotoxin-producing Escherichia coli O157 in dairy cattle and calves [PDF]

Data from a field study of 14 months duration in a naturally colonized dairy herd and data from an experiment with calves were used to quantify transmission of verocytotoxin-producing Escherichia coli (VTEC O157) in cattle.
Frankena, K., Graat, E.A.M., Jong, M.C.M., de, Schouten, J.M., Zijderveld, F.G., van   +4 more
core   +2 more sources

Strong Polar Ionospheric Electron Density Depletion Under Prolonged Northward IMF Bz Condition

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract Previous studies have primarily focused on high‐latitude ionospheric‐thermospheric (I‐T) variabilities under southward interplanetary magnetic field (IMF) conditions, while rare studies have investigated the I‐T responses to due northward Bz (NBz), especially in the presence of strong IMF By conditions.
Tianyu Cao, Yifan Lu, Jing Liu, Shuhan Li   +3 more
wiley   +1 more source