Results 21 to 30 of about 3,080,528 (152)

Analytical Study of some Kinematics Variables of Straight (Radial) Spike from Rare Region and its Relation with Accuracy in Volleyball [PDF]

open access: yesمجلة الرافدين للعلوم الرياضية, 2008
The study aims at: - Identifying values of some kinematics variables of straight (radial) crushing beat from the rare region. - Finding the relation among values of some kinematics variables of straight (radial) crushing beat from the rare region ...
Waleed Ghanim Thunoon
doaj   +1 more source

Accuracy of topocentric horizontal co-ordinates transformed from geocentric Cartesian co-ordinates

open access: yesGeodesy and Cartography, 2012
Accuracy of topocentric horizontal co-ordinates determined from geocentric Cartesian co-ordinates obtained using GPS is analysed in the paper. Accuracy of transformed topocentric horizontal co-ordinates is estimated by covariance matrix made of two ...
Jonas Skeivalas
doaj   +1 more source

Positioning Improvement for Spaceborne Laser Footprint Based on Precisely Terrain Data [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Spaceborne laser altimetry represents a novel active remote sensing technology applicable to earth observation, which together with imaging spectroscopy and synthetic aperture radar as a core technology for data acquisition in the earth observation ...
C. Xu   +6 more
doaj   +1 more source

The Integration of Two Interferometric Radars for Measuring Dynamic Displacement of Bridges

open access: yesRemote Sensing, 2021
Measurements of displacements of bridges under dynamic load are particularly difficult in the case of structures where access to the area under the tested structure is impossible.
Piotr Olaszek   +2 more
doaj   +1 more source

Systematic reviews of diagnostic test accuracy

open access: yes, 2008
More and more systematic reviews of diagnostic test accuracy studies are being published, but they can be methodologically challenging. In this paper, the authors present some of the recent developments in the methodology for conducting systematic ...
JJ Deeks   +6 more
core   +1 more source

An Interpretation Model for the Production Profile on the Same Angle of a Horizontal Well Trajectory

open access: yesFrontiers in Energy Research, 2020
An accurate interpretation of the fluid production profile is the essential scientific step required for the dynamic monitoring and management of a reservoir.
Wenguang Song, Na Jia, Qiongqin Jiang
doaj   +1 more source

ASSESSMENT OF THE IMPACT OF GROUND CONTROL POINT REDUCTION ON THE ACCURACY OF HIGH-RESOLUTION UAV-PPK PRODUCTS

open access: yesStudia Universitatis Babeş-Bolyai: Geographia
Assessment of the Impact of Ground Control Point Reduction on the Accuracy of High-Resolution UAV-PPK Products. This study evaluates the impact of reducing the number of ground control points (GCPs) on the accuracy of photogrammetric products within a ...
Ovidiu-Gabriel POP   +2 more
doaj   +1 more source

Assessment of the accuracy and convergence period of Precise Point Positioning

open access: yesAlexandria Engineering Journal, 2018
Precise Point Positioning (PPP) is a well-known positioning method that removes, models, or estimates GNSS system errors to reach the optimal position accuracy from a single receiver.
Mohammed Abou-Galala   +3 more
doaj   +1 more source

Natural convection heat transfer from two horizontal cylinders [PDF]

open access: yes, 2008
Natural convection heat transfer from a single horizontal cylinder and a pair of vertically aligned horizontal cylinders is investigated. Surface heat transfer distributions around the circumference of the cylinders are presented for Rayleigh numbers of ...
Murray, Darina B.   +2 more
core   +1 more source

Educational program according to contribution Percentage of some kinematic variables to the flat horizontal strike skill as a predictive indication of the accuracy of the technical performance of beginners in field hockey [PDF]

open access: yesAssiut Journal of Sport Science and Arts, 2018
The aim of this research is to make An Educational program according to contribution Percentage of some kinematic variables to the flat horizontal strike skill as a predictive indication of the accuracy of the technical performance of beginners in field ...
Samar Hassan Ahmed Manea   +1 more
doaj   +1 more source

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