Results 11 to 20 of about 1,141,152 (233)

Physical Conditions and Variability Processes in AGN Jets through Multi-Frequency Linear and Circular Radio Polarization Monitoring

open access: yesGalaxies, 2016
Radio polarimetry is an invaluable tool to investigate the physical conditions and variability processes in active galactic nuclei (AGN) jets. However, detecting their linear and circular polarization properties is a challenging endeavor due to their low
Ioannis Myserlis   +5 more
doaj   +1 more source

Discrete-element modeling of strain localization in a dense and highly coordinated periodic granular assembly

open access: yesFracture and Structural Integrity, 2022
Strain localization is one of the key phenomena which has been extensively studied in geomaterials and for other kinds of materials including metals and polymers. This well-known phenomenon appears when structure/material is closed to failure.
Trung-Kien Nguyen   +2 more
doaj   +1 more source

FEM–DEM modeling of pseudo static experiments on scaled‐down rockfill dams with dry stone pitching

open access: yesInternational Journal for Numerical and Analytical Methods in Geomechanics, Volume 47, Issue 5, Page 759-792, 10 April 2023., 2023
Abstract Rockfill dams with stone pitching are specific hydraulic structures generally built in the early XXth century where stones used to be hand‐placed without mortar to constitute the upward and downward dam faces. Few studies have been carried out to quantify the specific and critical role of the pitching in the dam stability against both static ...
Ali Haidar   +3 more
wiley   +1 more source

Using historical aerial images to accurately locate the urban "invisible" active faults: A case study of the Shuiyu fault of the Datong Basin in Shanxi province

open access: yesDizhi lixue xuebao, 2021
Active fault is a major risk source of urban earthquake disaster. Accurately identifying the spatial geometry distribution features of active fault is the basis for urban seismic risk migration.
GUO Fei   +5 more
doaj   +1 more source

Mapping rill soil erosion in agricultural fields with UAV‐borne remote sensing data

open access: yesEarth Surface Processes and Landforms, Volume 48, Issue 3, Page 596-612, 15 March 2023., 2023
An automatic workflow is introduced to map erosion rills at field scale in UAV‐photogrammetry derived digital elevation models by considering topographic features and machine learning. Abstract Soil erosion by water is a main form of land degradation worldwide.
Radek Malinowski   +3 more
wiley   +1 more source

DEM in quantitative analysis of structural geomorphology: application and prospect

open access: yesDizhi lixue xuebao, 2021
Digital elevation model (DEM) is used to realize the digital simulation of terrain surface (i.e. the digital representation of terrain surface shape) through the limited terrain elevation data.
CAO Pengju   +5 more
doaj   +1 more source

Regimes of the World (RoW): Opening New Avenues for the Comparative Study of Political Regimes

open access: yesPolitics and Governance, 2018
Classifying political regimes has never been more difficult. Most contemporary regimes hold de-jure multiparty elections with universal suffrage.
Anna Lührmann   +2 more
doaj   +1 more source

The RadioAstron Dedicated DiFX Distribution

open access: yesGalaxies, 2016
Distributed FX-architecture (DiFX) is a software Very Long Baseline Interferometry (VLBI) correlator currently adopted by several main correlation sites around the globe.
Gabriele Bruni   +5 more
doaj   +1 more source

Detection and Delineation of Sorted Stone Circles in Antarctica

open access: yesRemote Sensing, 2020
Sorted stone circles are natural surface patterns formed in periglacial environments. Their relation to permafrost conditions make them very helpful for better understanding the past climates where they were formed and have evolved and also for ...
Francisco Pereira   +3 more
doaj   +1 more source

Prognosys of dangerous geodynamic phenomena at the Kun-Manye field based on the analysis of digital elevation models [PDF]

open access: yesE3S Web of Conferences, 2020
The Kuhn-Magnyo copper-nickel deposit is located in the southeast of the Aldan-Stanovoy shield. Based on the results of geological exploration, the object is assessed as promising.
Usikov Vitaly
doaj   +1 more source

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