Results 181 to 190 of about 3,517 (221)

The management of VTEC O157 infection

International Journal of Food Microbiology, 2001
VTEC O157 infections, although showing a relentless rise in incidence over the last decade, only account for less than 10% of total food poisoning notifications in the UK. Despite this, the propensity for this infection to cause the serious and life-threatening clinical complications of haemolytic uraemic syndrome (HUS) and thrombotic thrombocytopaenic
S Dundas
exaly   +3 more sources

A study of vTEC above Nepal exploring different calibration techniques, including a comparison with the NeQuick-2 model

Astrophysics and Space Science, 2022
International audienceIn this paper, we investigate the performance of the NeQuick 2 (NeQ-2) model with respect to Ciraolo's and Gopi's derived ionospheric vertical TEC (vTEC) during the years 2014 and 2015.
P Poudel, Ashok Silwal, Basu Dev Ghimire   +2 more
exaly   +2 more sources

The control of VTEC in the animal reservoir

International Journal of Food Microbiology, 2001
A great diversity of VTECs exist but only in the case of Escherichia coli O157:H7, a common human foodborne pathogen, has sufficient research been done to allow generalizations about the ecology. The key features are as follows: lack of host specificity such that indistinguishable isolates can be found in a variety of species; near-ubiquitous ...
D, Hancock, T, Besser, J, Lejeune, M, Davis, D, Rice   +4 more
openaire   +2 more sources

IRI-vTEC versus GPS-vTEC for Nigerian SCINDA GPS stations

Advances in Space Research, 2015
Abstract Following the recent proliferation of dual-frequency GPS (Global Positioning System) receiver systems across the African continent, there is a growing number of papers that compare vertical Total Electron Content (vTEC) values derived from the International Reference Ionosphere (IRI) model with those obtained from the GPS receiver ...
Daniel Okoh, Lee-Anne McKinnell, Pierre Cilliers, Bonaventure Okere, Chinelo Okonkwo, Babatunde Rabiu   +5 more
openaire   +1 more source

Modelling the Ionospheric VTEC and Forecasting

2021
Ionospheric VTEC is the main ionosphere parameter with a substantial effect on radio wave propagation, thus causing delay errors in GPS signals. The ionospheric VTEC is normally used to present ionospheric delay regardless of the values of the GPS frequency delay when unknown.
N. A. Elmunim, M. Abdullah
openaire   +1 more source

Control of VTEC in Dutch livestock and meat production

International Journal of Food Microbiology, 2001
The Dutch government and the meat industry, recognising VTEC as having important public health, meat quality and economic implications, have taken a number of initiatives within the last 5 years to control VTEC in livestock and meat. These initiatives, brought together last year in a 'Masterplan VTEC', include short-, middle- and long-term priorities ...
Reinders, RD, Weber, MF, Lipman, LJA, Verhoeff, J, Bijker, PGH   +4 more
openaire   +4 more sources

The hidden burden of VTEC: an audit of daycare exclusion practice

Public Health, 2014
Goenka, A Ahmed-Little, Y Bothra, V Lighton, L eng Comment Letter Netherlands 2014/07/07 06:00 Public Health. 2014 Aug;128(8):762-3. doi: 10.1016/j.puhe.2014.03.006. Epub 2014 Jul 3.
Goenka, A, Ahmed-Little, Y, Bothra, V, Lighton, L   +3 more
openaire   +5 more sources

Chaos and Predictability in vTEC time series

2022
<p>Modeling the Earth’s ionosphere is a big challenge, due to the complexity of the system. Any ionospheric model misses the behavior of the real system for some fluctuating component, that appears almost impossible to predict, and is particularly threatening for the human technologies (e.g., GNSS navigation).
Massimo Materassi, Yenca Migoya-Orue, Tommaso Alberti, Sandro Radicella, Giuseppe Consolini   +4 more
openaire   +1 more source

VTEC At Low Latitude Station Using Galileo Pseudorange

IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020
The Global Navigation Satellite Systems GNSS retrieve data from multi-frequency and four constellations: GPS, GLONASS, GALILEO, BEIDOU. Global ionospheric models have not enough spatial resolution for regional purposes. Ecuador is located in the highest ionospheric activity zone (low latitude region).
Jonathan Panimboza, Alfonso Tierra
openaire   +1 more source

Ionospheric VTEC Forecasting using Machine Learning

2021
<p>The accuracy and reliability of Global Navigation Satellite System (GNSS) applications are affected by the state of the Earth‘s ionosphere, especially when using single frequency observations, which are employed mostly in mass-market GNSS receivers. In addition, space weather can be the cause of strong sudden disturbances
Randa Natras, Michael Schmidt
openaire   +1 more source