Results 111 to 120 of about 542,162 (354)

Fast, Nondestructive and Precise Biomass Measurements Are Possible Using Lidar-Based Convex Hull and Voxelization Algorithms

Remote Sensing
Light detection and ranging (lidar) scanning tools are available that can make rapid digital estimations of biomass. Voxelization and convex hull are two algorithms used to calculate the volume of the scanned plant canopy, which is correlated with ...
Matthew H. Siebers, Peng Fu, Bethany J. Blakely, Stephen P. Long, Carl J. Bernacchi, Justin M. McGrath   +5 more
doaj   +1 more source

Grass functional traits reflect the long history of fire and grazers in the savannas of Texas

American Journal of Botany, EarlyView.
Abstract Premise Understanding relationships among grass traits, fire, and herbivores may help improve conservation strategies for savannas that are threatened by novel disturbance regimes. Emerging theory, developed in Africa, emphasizes that functional traits of savanna grasses reflect the distinct ways that fire and grazers consume biomass ...
Ashish N. Nerlekar, Daniel Spalink, Joseph W. Veldman   +2 more
wiley   +1 more source

Convex hull deviation and contractibility [PDF]

Topological Methods in Nonlinear Analysis, 2017
We study the Hausdorff distance between a set and its convex hull. Let $X$ be a Banach space, define the CHD-module of space $X$ as the supremum of this distance for all subset of the unit ball in $X$. In the case of finite dimensional Banach spaces we obtain the exact upper bound of the CHD-module depending on the dimension of the space.
openaire   +4 more sources

Convex Hull Thrackles

, 2023
A \emph{thrackle} is a graph drawn in the plane so that every pair of its edges meet exactly once, either at a common end vertex or in a proper crossing. Conway's thrackle conjecture states that the number of edges is at most the number of vertices. It is known that this conjecture holds for linear thrackles, i.e., when the edges are drawn as straight ...
Keszegh, Balázs, Simon, Dániel
openaire   +2 more sources

Pressure‐Driven Reactivity in Dense Methane‐Nitrogen Mixtures

Angewandte Chemie International Edition, Volume 64, Issue 20, May 12, 2025.
CH4 and N2 are abundant molecules in our solar system and are the primary constituents of Titan's atmosphere. Under extreme pressures and temperatures within a diamond anvil cell, CH4 and N2 are demonstrated to react to form a range of compounds, dependent on the conditions and initial concentrations.
Hannah A. Shuttleworth, Mikhail A. Kuzovnikov, Lewis J. Conway, Huixin Hu, Jinwei Yan, Samuel Gallego‐Parra, Israel Osmond, Tomas Marqueño, Michael Hanfland, Dominique Laniel, Eugene Gregoryanz, Andreas Hermann, Miriam Peña‐Alvarez, Ross T. Howie   +13 more
wiley   +1 more source

Convex hulls in hamming space enable efficient search for similarity and clustering of genomic sequences

BMC Bioinformatics, 2020
Background In molecular epidemiology, comparison of intra-host viral variants among infected persons is frequently used for tracing transmissions in human population and detecting viral infection outbreaks.
David S. Campo, Yury Khudyakov
doaj   +1 more source

On the Convex Hull of Huffman Trees

Electronic Notes in Discrete Mathematics, 2010
A well-known kind of binary tree in information theory is Huffman tree. Given any linear objective function f, Huffman has given an algorithm allowing to find an optimal Huffman tree minimizing f. In this paper, we associate to each Huffman point of n nodes, a point in QnQn called Huffman point whose components are the length of the path from the root ...
Maurras, Jean-François, Nguyen, Thanh Hai, Nguyen, Viet Hung   +2 more
openaire   +2 more sources

High‐Pressure Synthesis of Nitrogen‐rich Y(N5)3·N2 Pentazolate with Perovskite Topology

Angewandte Chemie International Edition, Accepted Article.
The discovery and stabilization of the cyclo‐N5⁻ anion have introduced a class of pentazolate compounds with significant potential as high‐energy‐density materials. This potential could be further enhanced by increasing the pentazolate‐to‐metal ratio. Here, we report the high‐pressure high‐temperature synthesis and characterization of a novel yttrium ...
Andrey Aslandukov, Yuqing Yin, Maxim Bykov, Alena Aslandukova, Fariia Iasmin Akbar, Eleanor Lawrence Bright, Igor A. Abrikosov, Natalia Dubrovinskaia, Leonid Dubrovinsky   +8 more
wiley   +1 more source

Multifunctionality of Single‐Atom‐Thick 2D Magnetic Atoms in Nanolaminated M2AX: Toward Permanent Magnets and Topological Properties

Advanced Physics Research, EarlyView.
High‐throughput calculations unveil the stability, magnetic behavior, and transport properties of M2AX phases with magnetic A elements, predicting 139 metastable compounds. Highlights include high‐Curie‐temperature magnets, exceptional magneto‐crystalline anisotropy, and tunable anomalous Hall and Nernst conductivities, offering new insights and ...
Chen Shen, Fu Li, Yixuan Zhang, Ruiwen Xie, Ilias Samathrakis, Bing Han, Hongbin Zhang   +6 more
wiley   +1 more source

ANTI-FREEZING ADHESIVE EXPERIMENTAL STUDY BASED ON BIONICS

Jixie qiangdu, 2017
In order to solve the freezing adhesive problem on roller and belt during coal transportation process in winter,on the basis of referring to relevant freezing adhesive theory,inspired by bionics,we did the theoretical analysis and experimental research ...
WANG ChunHua, XU HanWen, WANG ZhongXian, QU Hui   +3 more
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