Results 11 to 20 of about 630 (169)

Experimental studies on the relationship between HDOP and position error in the GPS system

open access: yesMetrology and Measurement Systems, 2021
2D position error in the Global Positioning System (GPS) depends on the Horizontal Dilution of Precision (HDOP) and User Equivalent Range Error UERE. The non-dimensional HDOP coefficient, determining the influence of satellite distribution on the positioning accuracy, can be calculated exactly for a given moment in time.
Specht, Mariusz
openaire   +3 more sources

A Cost Function for the Uncertainty of Matching Point Distribution on Image Registration

open access: yesISPRS International Journal of Geo-Information, 2021
Computing the homography matrix using the known matching points is a key step in computer vision for image registration. In practice, the number, accuracy, and distribution of the known matching points can affect the uncertainty of the homography matrix.
Yuxia Bian   +6 more
doaj   +2 more sources

Falciparum but not vivax malaria increases the risk of hypertensive disorders of pregnancy in women followed prospectively from the first trimester

open access: yesBMC Medicine, 2021
Background Malaria and hypertensive disorders of pregnancy (HDoP) affect millions of pregnancies worldwide, particularly those of young, first-time mothers.
Whitney E. Harrington   +12 more
doaj   +2 more sources

Performance analysis and improvement of the ultra-wide band localization system

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2017
With the very wide spectrum and high resolution characteristics, ultra-wideband (UWB) communication technique is chosen various indoor localization.
Kerem Küçük
doaj   +2 more sources

A Novel Multi-Target Mu/Delta Opioid Receptor Agonist, HAGD, Produced Potent Peripheral Antinociception with Limited Side Effects in Mice and Minimal Impact on Human Sperm Motility In Vitro

open access: yesMolecules, 2023
Pain is a common clinical symptom among patients. Although various opioid analgesics have been developed, their side effects hinder their application. This study aimed to develop a novel opioid analgesic, HAGD (H-Tyr-D-AIa-GIy-Phe-NH2), with limited side
Fangfang Li   +5 more
doaj   +2 more sources

Biotelemetry marches on: A cost-effective GPS device for monitoring terrestrial wildlife. [PDF]

open access: yesPLoS ONE, 2018
The availability of low-cost wildlife trackers increases the capacity to collect valuable ecological data when research budgets are limited. We converted a commercially available global positioning system (GPS) product into a low-cost tracking device ...
Manuela Fischer   +6 more
doaj   +2 more sources

TECHNIQUE OF CONSTRUCTION AND ANALYSIS OF GLONASS FIELDS OF ACCURACY IN THE GIVEN ZONE OF AIRSPACE

open access: yesНаучный вестник МГТУ ГА, 2016
Based on the usage of LabView’s developed program of orbital motion modeling and the choice of satellite’s working constellation, the methodology of building-up the fields of potential accuracy GLONASS in the given airspace has been proposed. The methods
O. N. Skrypnik   +2 more
doaj   +1 more source

Effects of single and combined gestational phthalate exposure on blood pressure, blood glucose and gestational weight gain: A longitudinal analysis

open access: yesEnvironment International, 2021
Few studies have investigated the association of gestational exposure to phthalate with metabolic risk and have reached inconsistent conclusions. Based on the Ma’anshan Birth Cohort, 3273 women were included in the present study.
Hui Gao   +10 more
doaj   +1 more source

Quantification Method for the Uncertainty of Matching Point Distribution on 3D Reconstruction

open access: yesISPRS International Journal of Geo-Information, 2020
Matching points are the direct data sources of the fundamental matrix, camera parameters, and point cloud calculation. Thus, their uncertainty has a direct influence on the quality of image-based 3D reconstruction and is dependent on the number, accuracy,
Yuxia Bian   +5 more
doaj   +1 more source

Processing of the Results of Satellite Inland Positioning Transport Using Mobile Devices and Their Visualization

open access: yesCommunications, 2022
The issue of spatial data visualization is currently an important element in the positioning and navigation process. The constant trend in increasing the accuracy and availability of position modules affects the widespread use of the mobile devices in ...
Małgorzata Kulas
doaj   +1 more source

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