Results 21 to 30 of about 15,520,995 (329)

GENERIC UNLABELED GLOBAL RIGIDITY

open access: yesForum of Mathematics, Sigma, 2019
Let $\mathbf{p}$ be a configuration of $n$ points in $\mathbb{R}^{d}$ for some $n$ and some $d\geqslant 2$. Each pair of points has a Euclidean distance in the configuration.
STEVEN J. GORTLER   +2 more
doaj   +1 more source

Orthographic measures of language distances between the official South African languages

open access: yesLiterator, 2008
Two methods for objectively measuring similarities and dissimilarities between the eleven official languages of South Africa are described. The first concerns the use of n-grams.
P.N. Zulu, G. Botha, E. Barnard
doaj   +1 more source

N—H⋯N hydrogen bonding in 4,6-diphenyl-2-pyrimidinylamine isolated from the plant Justicia secunda (Acanthaceae) [PDF]

open access: yes, 2004
The title compound, C₁₆H₁₃N₃, isolated from Justicia secunda (Acanthaceae), comprises two molecules (which differ slightly in conformation) in the asymmetric unit of space group P\overline 1.
Chatterjee, Baidyanath   +4 more
core   +1 more source

Metallointercalators: structure of rac-bis(ethylenediamine)(9,10-phenanthrenequinone diimine)rhodium(III) tribromide trihydrate [PDF]

open access: yes, 1992
Bis(ethylenediamine)(phenanthrenequinone diimine)rhodium(III) tribromide trihydrate has a nearly planar phenanthrenequinone diimine ligand and two ordered ethylenediamine ligands, giving a distorted octahedral coordination to the compound.
Barton, Jacqueline K.   +4 more
core   +1 more source

Improving the Accuracy of Laplacian Estimation with Novel Variable Inter-Ring Distances Concentric Ring Electrodes

open access: yesSensors, 2016
Noninvasive concentric ring electrodes are a promising alternative to conventional disc electrodes. Currently, the superiority of tripolar concentric ring electrodes over disc electrodes, in particular, in accuracy of Laplacian estimation, has been ...
Oleksandr Makeyev, Walter G. Besio
doaj   +1 more source

About Notiophilus Duméril, 1806 (Coleoptera, Carabidae): Species delineation and phylogeny using DNA barcodes [PDF]

open access: yesDeutsche Entomologische Zeitschrift, 2019
The genus Notiophilus Duméril, 1806 is a distinctive taxon of small, diurnal and morphologically similar beetles exhibiting large eyes and widened second elytral intervals.
Michael J. Raupach   +3 more
doaj   +3 more sources

Intermolecular N-H...N and C-H...O interactions from one-dimensional chains comprising the two independent molecules of N,N'-dicyclohexyl-N-nicotinoylurea [PDF]

open access: yes, 1999
The title_compound, C₁₉H₂₇N₃0₂, crystallizes in space group P1 with two molecules in the asymmetric unit which differ slightly in conformation. Intermolecular N--H...N and C--H...O interactions generate a hydrogen-bonded ring system between the ...
Gallagher, John F.   +2 more
core   +1 more source

Dashing: fast and accurate genomic distances with HyperLogLog

open access: yesGenome Biology, 2018
Dashing is a fast and accurate software tool for estimating similarities of genomes or sequencing datasets. It uses the HyperLogLog sketch together with cardinality estimation methods that are specialized for set unions and intersections.
Daniel N. Baker, Ben Langmead
semanticscholar   +1 more source

Solving the general inter-ring distances optimization problem for concentric ring electrodes to improve Laplacian estimation

open access: yesBioMedical Engineering OnLine, 2018
Background Superiority of noninvasive tripolar concentric ring electrodes over conventional disc electrodes in accuracy of surface Laplacian estimation has been demonstrated in a range of electrophysiological measurement applications. Recently, a general
Oleksandr Makeyev
doaj   +1 more source

Neutral and Cationic Rare Earth Metal Alkyl and Benzyl Compounds with the 1,4,6-Trimethyl-6-pyrrolidin-1-yl-1,4-diazepane Ligand and Their Performance in the Catalytic Hydroamination/Cyclization of Aminoalkenes [PDF]

open access: yes, 2008
A new neutral tridentate 1,4,6-trimethyl-6-pyrrolidin-1-yl-1,4-diazepane (L) was prepared. Reacting L with trialkyls M(CH2SiMe3)3(THF)2 (M = Sc, Y) and tribenzyls M(CH2Ph)3(THF)3 (M = Sc, La) yielded trialkyl complexes (L)M(CH2SiMe3)3 (M = Sc, 1; M = Y ...
Arndt S.   +60 more
core   +3 more sources

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