Racah algebra for the double trigonal group

1982 ◽  
Vol 60 (7) ◽  
pp. 927-938 ◽  
Author(s):  
B. Lulek ◽  
T. Lulek ◽  
R. Chatterjee
Keyword(s):  
Symmetry Reduction ◽  
Full List ◽  
Permutation Matrices ◽  
Reduction Problem ◽  
Complete Set ◽  
Gordan Coefficient ◽  
Spinor Representations ◽  
Racah Algebra

A complete set of the 3jΓγ symbols for the double trigonal group [Formula: see text] is presented together with appropriate tables allowing evaluation of the numerical value of any Clebsch–Gordan coefficient for this group. The corresponding permutation matrices are derived. The complete set of 6Γ-symbols for both tensor and spinor representations is tabulated. The symmetry reduction problem for the chain [Formula: see text] involving a change of the axis of quantization is discussed in detail, and a full list of appropriate decomposition and reduction coefficients is given.

The publications and collections of Louis-Albert Necker (1786–1861)

2015 ◽  
Vol 42 (1) ◽  
pp. 66-75 ◽  
Author(s):  
John Hollier ◽  
Anita Hollier ◽  
Cédric Schnyder
Keyword(s):  
Necker Cube ◽  
Optical Illusion ◽  
Full List ◽  
Scientific Collections ◽  
Isle Of Skye

The Swiss geologist and mineralogist Louis-Albert Necker belonged to a family rich in scientific celebrities. Though a professor at the Académie de Genève for 25 years and author of numerous publications, he is mainly remembered today for his description of the “Necker cube” optical illusion and for leaving Geneva to spend the last 20 years of his life in Portree on the Isle of Skye. As a first step towards assessing Necker's contribution to science, a full list of his publications is presented, with comments about their citation in previous bibliographies and about published translations and abridgements. Information about the surviving specimens from his scientific collections, most of which are in the Muséum d'histoire naturelle de Genève, is also presented.

Bonded Force Constant Derivation of Lysine-Arginine Cross-linked Advanced Glycation End-Products

2018 ◽  
Author(s):  
Anthony Nash ◽  
Nora H de Leeuw ◽  
Helen L Birch
Keyword(s):  
Molecular Dynamics ◽  
Force Constant ◽  
Computational Study ◽  
Force Constants ◽  
Quantum Mechanical ◽  
Advanced Glycation ◽  
Partial Charges ◽  
Cross Links ◽  
Complete Set ◽  
Dynamics Simulations

<div> <div> <div> <p>The computational study of advanced glycation end-product cross- links remains largely unexplored given the limited availability of bonded force constants and equilibrium values for molecular dynamics force fields. In this article, we present the bonded force constants, atomic partial charges and equilibrium values of the arginine-lysine cross-links DOGDIC, GODIC and MODIC. The Hessian was derived from a series of <i>ab initio</i> quantum mechanical electronic structure calculations and from which a complete set of force constant and equilibrium values were generated using our publicly available software, ForceGen. Short <i>in vacuo</i> molecular dynamics simulations were performed to validate their implementation against quantum mechanical frequency calculations. </p> </div> </div> </div>

Groundwater abstraction across the Indo-Gangetic basin (2010)

2017 ◽  
Author(s):  
Gabin Archambault
Keyword(s):  
High Resolution ◽  
Data Sources ◽  
Geological Survey ◽  
Groundwater Abstraction ◽  
British Geological Survey ◽  
Full List

This 1 km resolution grid shows the estimated mean annual groundwater abstraction in millimeters across the Indo-Gangetic basin based on data from 2010. Methodology and a full list of data sources used can be found in the peer-reviewed paper: https://www.nature.com/articles/ngeo2791.epdf?author_access_token=_2Z_fJZxRkSVmgVJ7xHTVdRgN0jAjWel9jnR3ZoTv0O07GfIlzqIVm44UgFPb1r62_FUJLao4zkJSzYpv-4gIWJorRXEpgh4iarB8vlRNY_tGV_18CAf2j-_GnADYbdp The raster and a high resolution PDF file are available for download on the website of British Geological Survey (BGS): http://www.bgs.ac.uk/research/groundwater/international/SEAsiaGroundwater/mapsDownload.html Abstraction Groundwater Stress

Groundwater storage in Africa

2017 ◽  
Author(s):  
Gabin Archambault
Keyword(s):  
High Resolution ◽  
Effective Porosity ◽  
Data Sources ◽  
Groundwater Storage ◽  
British Geological Survey ◽  
Full List ◽  
The World ◽  
Storage Type ◽  
Porosity Range ◽  
Aquifer Flow

This 5 km resolution grid presents groundwater storage in Africa (in mm). This parameter was estimated by combining the saturated aquifer thickness and effective porosity of aquifers across Africa. For each aquifer flow/storage type an effective porosity range was assigned based on a series of studies across Africa and surrogates in other parts of the world. Groundwater storage is given in millimeters. Detailed description of the methodology, and a full list of data sources used to develop the layer can be found in the peer-reviewed paper available here: http://iopscience.iop.org/article/10.1088/1748-9326/7/2/024009/pdf The raster and a high resolution PDF file are available for download on the website of British Geological Survey (BGS): http://www.bgs.ac.uk/research/groundwater/international/africanGroundwater/mapsDownload.html Groundwater Storage

Construction of LDPC Codes Based on Circulant Permutation Matrices

2011 ◽  
Vol 30 (10) ◽  
pp. 2384-2387 ◽  
Author(s):  
Hua Qiao ◽  
Wu Guan ◽  
Ming-ke Dong ◽  
Hai-ge Xiang
Keyword(s):  
Ldpc Codes ◽  
Permutation Matrices
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