Results 91 to 100 of about 13,814,223 (289)

THE USE OF UNMANNED AERIAL VEHICLES FOR CADASTRAL MAPPING IN GHANA-ASSESSING THE EFFECT OF VARYING SENSOR TYPES, FLYING HEIGHT, IMAGE OVERLAP AND GROUND CONTROL POINT DENSITY

African Journal on Land Policy and Geospatial Sciences, 2022
Context and background In Ghana the predominant method for performing cadastral surveys is through the use of Global Navigation Satellite Systems (GNSS) static surveys and to a lesser extent Total Stations.
Mark Brookman-Amissah
doaj   +1 more source

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

Quality assessment of selected ground control points of project CAS 2012-2014 [PDF]

, 2015
The purpose of this graduation thesis, placed in a selected area aerial photography (photogrammetric\ud block number 9, of the treaty of cyclic aerial photography of Slovenia in 2012), is to check the quality\ud of ground control points in the new ...
Medved, Andreja
core  

ALGORITHM FOR DIGITAL CONTROL OF THE ANTENNA OF THE GROUND CONTROL POINT OF THE UNMANNED AVIATION COMPLEX

Проблеми створення, випробування, застосування та експлуатації складних інформаційних систем, 2019
Every year, unmanned aircraft systems are increasingly used in both the civilian and military spheres. Stable communication with an unmanned aerial vehicle is provided by high-precision pointing of the antenna of the ground control point. In the automatic tracking mode of an unmanned aerial vehicle, the antenna guidance is carried out by the automatic ...
V. V. Vortnikov, I. V. Zimchuk, R. V. Netrebko   +2 more
openaire   +4 more sources

Automating Ground Control Point Detection in Drone Imagery: From Computer Vision to Deep Learning

Remote Sensing
Drone-based photogrammetry typically requires the task of georeferencing aerial images by detecting the center of Ground Control Points (GCPs) placed in the field. Since this is a very labor-intensive task, it could benefit greatly from automation.
Gonzalo Muradás Odriozola, Klaas Pauly, Samuel Oswald, Dries Raymaekers   +3 more
doaj   +1 more source

Ground-based telescope pointing and tracking optimization using a neural controller

Neural Networks, 2003
Neural network models (NN) have emerged as important components for applications of adaptive control theories. Their basic generalization capability, based on acquired knowledge, together with execution rapidity and correlation ability between input stimula, are basic attributes to consider NN as an extremely powerful tool for on-line control of ...
D. Mancini, Massimo Brescia, Pietro Schipani   +2 more
openaire   +5 more sources

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

Research on Time Series Monitoring of Surface Deformation in Tongliao Urban Area Based on SBAS-PS-DS-InSAR

Sensors
As urban economies flourish and populations become increasingly concentrated, urban surface deformation has emerged as a critical factor in city planning that cannot be overlooked. Surface deformation in urban areas can lead to deformations in structural
Yuejuan Chen, Cong Ding, Pingping Huang, Bo Yin, Weixian Tan, Yaolong Qi, Wei Xu, Siai Du   +7 more
doaj   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

FEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

POS Assisted Aerial Triangulation Method for Single Flight Strip Without Ground Control Points

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
In scenarios such as road detection and emergency mapping, single strip photogrammetry without ground control points (GCPs) can effectively improve data acquisition efficiency.
Jianchen Liu, Rumeng Li, Wei Guo
doaj   +1 more source