Results 41 to 50 of about 5,537,193 (382)

Quasi-Tree Graphs With Extremal General Multiplicative Zagreb Indices

open access: yesIEEE Access, 2020
Zagreb indices and their modified versions of a molecular graph are important molecular descriptors which can be applied in characterizing the structural properties of organic compounds from different aspects. In this article, by exploring the structures
Jianwei Du, Xiaoling Sun
doaj   +1 more source

Computing the Scale of an Endomorphism of a totally Disconnected Locally Compact Group

open access: yesAxioms, 2017
The scale of an endomorphism of a totally disconnected, locally compact group G is defined and an example is presented which shows that the scale function is not always continuous with respect to the Braconnier topology on the automorphism group of G ...
George A. Willis
doaj   +1 more source

Efficient Tree Tensor Network States (TTNS) for Quantum Chemistry: Generalizations of the Density Matrix Renormalization Group Algorithm [PDF]

open access: yes, 2013
We investigate tree tensor network states for quantum chemistry. Tree tensor network states represent one of the simplest generalizations of matrix product states and the density matrix renormalization group.
Chan, Garnet Kin-Lic, Nakatani, Naoki
core   +2 more sources

‘The Beckoning Obstruction’: On the theme of scarcity in the poetry of Peter Larkin

open access: yesJournal of British and Irish Innovative Poetry, 2020
Although he writes almost exclusively about trees and one of his main themes is scarcity, Peter Larkin should not be considered only an ecological nature poet.
John Milbank
doaj   +2 more sources

Are portrait artists superior face recognizers? Limited impact of adult experience on face recognition ability. [PDF]

open access: yes, 2017
Across two studies, we asked whether extensive experience in portrait art is associated with face recognition ability. In Study 1, 64 students completed a standardized face recognition test before and after completing a year-long art course that included
Jeremy Tree, Ruth Horry
core   +1 more source

Spruce Budworm Egg Mass Density on Balsam Fir and White Spruce: Low Population Levels (Lepidoptera: Tortricidae) [PDF]

open access: yes, 2017
As part of a study to develop improved foliage sampling methods for spruce budworm, Choristoneura fumiferana (Clemens), egg masses, two balsam fir (four in one stand), Abies balsamea, and two white spruce, Picea glauca, trees were chosen from each of ...
Fowler, Gary W, Simmons, Gary A
core   +2 more sources

Categorizing Ideas about Trees: A Tree of Trees

open access: yesPLoS ONE, 2013
The aim of this study is to explore whether matrices and MP trees used to produce systematic categories of organisms could be useful to produce categories of ideas in history of science. We study the history of the use of trees in systematics to represent the diversity of life from 1766 to 1991.
Marie Fisler, Guillaume Lecointre
openaire   +4 more sources

Combinatorial families of multilabelled increasing trees and hook-length formulas [PDF]

open access: yes, 2014
In this work we introduce and study various generalizations of the notion of increasingly labelled trees, where the label of a child node is always larger than the label of its parent node, to multilabelled tree families, where the nodes in the tree can ...
Kuba, Markus, Panholzer, Alois
core   +1 more source

z-Tree: Zurich toolbox for ready-made economic experiments

open access: yes, 1999
z-Tree (Zurich Toolbox for Ready-made Economic Experiments) is a software for developing and conducting economic experiments. The software is stable and allows programming almost any kind of experiments in a short time.
U. Fischbacher
semanticscholar   +1 more source

Tree contractions and evolutionary trees [PDF]

open access: yesSIAM Journal on Computing, 1997
An evolutionary tree is a rooted tree where each internal vertex has at least two children and where the leaves are labeled with distinct symbols representing species. Evolutionary trees are useful for modeling the evolutionary history of species. An agreement subtree of two evolutionary trees is an evolutionary tree which is also a topological subtree
openaire   +4 more sources

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