Results 61 to 70 of about 35,939 (297)

Space Geodesy Data Implementation for Earth System Geodynamics Monitoring: A Case Study of the Aegean Microplate

open access: yesCivil and Environmental Engineering
The advances in geodesy that are continually occurring allow the science of investigating the Earth’s shape and size to be applied to the observation of its geodynamics as well. Space geodesy and remote sensing methods enable the desired phenomenon to be
Smrčková Daša   +4 more
doaj   +1 more source

The naturalness index for the identification of natural areas on regional scale

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2021
Researchers have been trying to measure the influence of humankind on our environment for several decades. Among the technical solutions for this goal, approaches for a rule-based fusion of different geospatial information layers have reached the ...
Burak Ekim   +3 more
doaj   +1 more source

The Skylab radar altimeter [PDF]

open access: yes, 1972
A summary of the significant hardware characteristics of the S-193 altimeter experiment portion of the 1973 Skylab Mission is presented. A detailed discussion of the altimetry, oceanographic, and instrumentation technology objectives are presented along ...
Mcgoogan, J. T., Stanley, H. R.
core   +1 more source

VAE+DDPG: An Attention‐Enhanced Variational Autoencoder for Deep Reinforcement Learning‐Based Autonomous Navigation in Low‐Light Environments

open access: yesAdvanced Intelligent Systems, EarlyView.
Variational Autoencoder+Deep Deterministic Policy Gradient addresses low‐light failures of infrared depth sensing for indoor robot navigation. Stage 1 pretrains an attention‐enhanced Variational Autoencoder (Convolutional Block Attention Module+Feature Pyramid Network) to map dark depth frames to a well‐lit reconstruction, yielding a 128‐D latent code ...
Uiseok Lee   +7 more
wiley   +1 more source

Uncertainty Calibration in Molecular Machine Learning: Comparing Evidential and Ensemble Approaches

open access: yesChemistry – A European Journal, EarlyView.
Raw uncertainty estimates from deep evidential regression and deep ensembles are systematically miscalibrated. Post hoc calibration aligns predicted uncertainty with true errors, improving reliability and enabling efficient active learning and reducing computational cost while preserving predictive accuracy.
Bidhan Chandra Garain   +3 more
wiley   +1 more source

Effect of spatial correlation on the performances of modernized GPS and Galileo in relative positioning

open access: yesGeodesy and Cartography, 2020
In the context of processing GNSS (Global Navigation Satellite System) data, it is known that the estimation of the ionospheric delays decreases the strength of the observation model and makes significant the time required to fix the ambiguities namely ...
Noureddine Kheloufi, Abdelhalim Niati
doaj   +1 more source

First scientific VLBI observations using New Zealand 30 metre radio telescope WARK30M [PDF]

open access: yes, 2015
We report the results of a successful 24 hour 6.7 GHz VLBI experiment using the 30 meter radio telescope WARK30M near Warkworth, New Zealand, recently converted from a radio telecommunications antenna, and two radio telescopes located in Australia ...
Ellingsen, Simon   +5 more
core   +2 more sources

Scalp‐negative medial temporal interictal epileptic discharges alter large‐scale brain networks: A simultaneous high‐density electroencephalographic and intracranial electroencephalographic study

open access: yesEpilepsia, EarlyView.
Abstract Objective Interictal epileptiform discharges (IEDs) observed on scalp electroencephalography (EEG) serve as a diagnostic hallmark of epilepsy. However, only a small fraction of IEDs recorded by intracranial EEG (iEEG) are detectable on the scalp; the vast majority remain invisible on scalp recordings.
Nicolas Roehri   +7 more
wiley   +1 more source

Position determination of the Chang’e 3 lander with geodetic VLBI

open access: yesEarth, Planets and Space, 2019
We present results from the analysis of observations of the Chang’e 3 lander using geodetic Very Long Baseline Interferometry. The applied processing strategy as well as the limiting factors to our approach is discussed.
Grzegorz Klopotek   +9 more
doaj   +1 more source

Study on the Preliminary Design of ARGO-M Operation System [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2010
Korea Astronomy and Space Science Institute has been developing one mobile satellite laser ranging system named as accurate ranging system for geodetic observation-mobile (ARGO-M). Preliminary design of ARGO-M operation system (AOS) which is one of the
Yoon-Kyung Seo   +6 more
doaj   +1 more source

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