Results 31 to 40 of about 2,886,103 (258)

New insights into the drainage of inundated ice-wedge polygons using fundamental hydrologic principles [PDF]

open access: yesThe Cryosphere, 2021
The pathways and timing of drainage from the inundated centers of ice-wedge polygons in a warming climate have important implications for carbon flushing, advective heat transport, and transitions from methane to carbon dioxide dominated emissions. Here,
D. R. Harp   +10 more
doaj   +1 more source

Flat area characteristics of polygons circumscribing parabolic figures [PDF]

open access: yesE3S Web of Conferences, 2020
The works elucidates the extremum areas of the polygons circumscribing parabolic figures. It is shown that the ratio of the areas of the polygons circumscribed near parabolic figures to the areas of the corresponding figures always remains a constant ...
Egereva Elvira   +2 more
doaj   +1 more source

RBFCUB: A numerical package for near-optimal meshless cubature on general polygons

open access: yesApplied Mathematics Letters, 2022
In this paper we improve the cubature rules discussed in [12] for the computation of integrals by radial basis functions (RBFs). More precisely, we introduce in the context of meshless cubature a leave-one-out cross validation criterion for the ...
R. Cavoretto   +3 more
semanticscholar   +1 more source

Understanding the relative importance of vertical and horizontal flow in ice-wedge polygons [PDF]

open access: yesHydrology and Earth System Sciences, 2020
Ice-wedge polygons are common Arctic landforms. The future of these landforms in a warming climate depends on the bidirectional feedback between the rate of ice-wedge degradation and changes in hydrological characteristics.
N. A. Wales   +9 more
doaj   +1 more source

Brief communication: Rapid machine-learning-based extraction and measurement of ice wedge polygons in high-resolution digital elevation models [PDF]

open access: yesThe Cryosphere, 2019
We present a workflow for the rapid delineation and microtopographic characterization of ice wedge polygons within high-resolution digital elevation models.
C. J. Abolt   +4 more
doaj   +1 more source

Mid-Term Monitoring of Suspended Sediment Plumes of Greek Rivers Using Moderate Resolution Imaging Spectroradiometer (MODIS) Imagery

open access: yesRemote Sensing, 2023
This study focuses on the suspended sediment delivery of 17 rivers and streams of various sizes to the sea over a wide geographical area covering most of the Greek peninsula, utilizing two Moderate Resolution Imaging Spectroradiometer (MODIS) products ...
Sotirios Karalis   +2 more
doaj   +1 more source

SEGMENTATION OF SINGLE STANDING DEAD TREES IN HIGH-RESOLUTION AERIAL IMAGERY WITH GENERATIVE ADVERSARIAL NETWORK-BASED SHAPE PRIORS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
The use of multispectral imagery for monitoring biodiversity in ecosystems is becoming widespread. A key parameter of forest ecosystems is the distribution of dead wood.
P. Polewski   +3 more
doaj   +1 more source

The Hyperplanes of the M 24 Near Polygon [PDF]

open access: yesGraphs and Combinatorics, 2002
Consider the unique Steiner system \(S(5,8,24)\) on a set \(\Omega\) of 24 symbols. Let \(\Gamma = (P,L)\) be the partial linear space (with point set \(P\) and line set \(L\)) obtained by taking the 759 octads as points, and the triples of pairwise disjoint octads as lines. The space \(\Gamma\) is the (unique) regular near hexagon of order \((s,t,t_2)
Andries E. Brouwer   +2 more
openaire   +2 more sources

Configural relations in humans and deep convolutional neural networks

open access: yesFrontiers in Artificial Intelligence, 2023
Deep convolutional neural networks (DCNNs) have attracted considerable interest as useful devices and as possible windows into understanding perception and cognition in biological systems.
Nicholas Baker   +3 more
doaj   +1 more source

Occurrence and recurrence of forest fires in Itatiaia National Park between 2008 and 2016

open access: yesBiodiversidade Brasileira, 2020
Some ecosystems are adapted to fire disturbances, but as fires become recurrent in the same area, fire can cause drastic landscape changes resulting in loss of biodiversity.
Isabela Braga Belchior   +6 more
doaj   +3 more sources

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