نتایج جستجو برای: vtec
تعداد نتایج: 370 فیلتر نتایج به سال:
HUS is one of the most common causes of acute renal failure in childhood. D+ HUS is the most common form and usually follows an episode of hemorrhagic colitis due to VTEC or S. dysenteriae type 1. The SLT elaborated by these organisms is responsible for the endothelial damage that is the initial insult in the pathogenesis of the acute renal failure. Excellent supportive care is necessary to red...
The Faraday Rotation (FR) is a non-negligible effect at the L-band, which operation frequency of Soil Moisture and Ocean Salinity (SMOS) mission. This introduces rotation in electromagnetic field polarization when propagating through ionosphere that must be compensated. Recently, methodology was developed order to retrieve Vertical Total Electron Content (VTEC) from SMOS radiometric data with a...
Under the influence of space weather, abnormal disturbances in ionosphere will distort model seriously and affect global navigation satellite system negatively. This study analyzes ionospheric activity characteristics performance low latitude during a strong geomagnetic storm from 7 to 9 September 2017. The research goals are determine behavior refine latitude. In experiment, vertical total ele...
The conversion between the line-of-sight slant total electron content (STEC) and vertical (VTEC) depends on mapping function (MF) under widely used thin layer ionospheric model. height (TLIH) is an essential parameter of MF, which affects accuracy STEC VTEC. Due to influence temporal spatial variations ionosphere, optimal TLIH not constant over globe, particularly in polar regions. In this pape...
A small study was carried out in order to examine the molecular presence of bla CTX-M gene phylogenetic groups in E. coli (n=263) isolated from food (n=54), water (n=7), animal sources (n=69), using consensus bla CTX-M primers and PCR, in addition to human faecal isolates (n=69) and VTEC O157:H7 (n=64). None of the clinically significant faecal VTEC O157:H7 isolates were shown to carry blaCTX-M...
In this study, we assess the Dynamic Mode Decomposition (DMD) model applied with global ionospheric vertical Total Electron Content (vTEC) maps to construct 24-h vTEC map forecasts using available International GNSS Service (IGS) 2-h cadence maps. addition, examine impact of a EUV 121.6 nm time series data source DMD control (DMDc) framework, which shows an improvement in Root Mean Square Error...
This article presents a method for determining near-Pole ionization depletion regions and troughs from global navigation satellite system (GNSS) vertical total electron content (VTEC) maps. To define the regions, we use Image processing tools, considering VTEC maps as gray-level images. In this work, watershed segmentation is applied to determine edges of based on flow areas between lowest zone...
As the study of ionospheric behavior during various solar activities is an important task, studies changes eclipse events have been widely performed in different regions globe. This paper investigates responses to on 22 July 2009 over Nepal using total electron content (TEC) measured by dual-frequency Global Positioning System (GPS) receivers. The time-averaged Vertical TEC (vTEC) ten GPS stati...
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