Group Representations and Selection Rules

2003 ◽  
pp. 171-216
Author(s):  
Floyd Williams
Keyword(s):  
Group Representations ◽  
Selection Rules

Selectivity Loss Due to Magnetic Field in Laser Isotope Separation of Gadolinium Based on Polarization Selection Rules

2003 ◽  
Vol 40 (12) ◽  
pp. 1014-1018 ◽  
Author(s):  
Shigeki TOKITA ◽  
Yasukazu IZAWA ◽  
Hideaki NIKI ◽  
Fumiyoshi KUWASHIMA
Keyword(s):  
Magnetic Field ◽  
Isotope Separation ◽  
Selection Rules ◽  
Laser Isotope Separation

Populist Parties in Lithuania: Curious Case of Party Order and Justice and its Leadership

2019 ◽  
Vol 7 (1) ◽  
pp. 120-137 ◽  
Author(s):  
Mindaugas Jurkynas
Keyword(s):  
Party System ◽  
Leadership Selection ◽  
Political Careers ◽  
New Parties ◽  
Selection Rules ◽  
Electoral Support ◽  
The Face

AbstractThe article discusses conceptualisation of populism, Lithuania’s party system and electoral dynamics and their relation to the sustainability of populist parties. Special attention is given to Party Order and Justice, a former populist and protest party, and its leadership, namely to the issues related to scope and competencies of a leader’s intra-partisan power, leadership selection rules and history, development of leaders’ political careers and their electoral activity. The L ithuanian party system now exhibits moderate fragmentation without centrifugal tendencies. Voter volatility is still relatively high, yet the share of new parties has dropped to zero. The protest and populist parties in Lithuania went into the margins of political establishment. Popularity of the Order and Justice party has long been connected to the formerly impeached president Rolandas Paksas. His long-term leadership in the face of plummeting electoral support and an emphasis on his political martyrdom resulted in poor electoral performances, ensuing internal squabbles and his departure. Party Order and Justice’s internal regulations, however, remained favourable to strong leadership.

scholarly journals Joseph Fourier 250thBirthday: Modern Fourier Analysis and Fourier Heat Equation in Information Sciences for the XXIst Century

Entropy ◽  
2019 ◽  
Vol 21 (3) ◽  
pp. 250
Author(s):  
Frédéric Barbaresco ◽  
Jean-Pierre Gazeau
Keyword(s):  
Fourier Analysis ◽  
Heat Equation ◽  
Harmonic Analysis ◽  
Lie Groups ◽  
Coherent States ◽  
Geometric Theory ◽  
Plancherel Formula ◽  
Group Representations ◽  
Modern Development ◽  
Xxist Century

For the 250th birthday of Joseph Fourier, born in 1768 at Auxerre in France, this MDPI special issue will explore modern topics related to Fourier analysis and Fourier Heat Equation. Fourier analysis, named after Joseph Fourier, addresses classically commutative harmonic analysis. The modern development of Fourier analysis during XXth century has explored the generalization of Fourier and Fourier-Plancherel formula for non-commutative harmonic analysis, applied to locally compact non-Abelian groups. In parallel, the theory of coherent states and wavelets has been generalized over Lie groups (by associating coherent states to group representations that are square integrable over a homogeneous space). The name of Joseph Fourier is also inseparable from the study of mathematics of heat. Modern research on Heat equation explores geometric extension of classical diffusion equation on Riemannian, sub-Riemannian manifolds, and Lie groups. The heat equation for a general volume form that not necessarily coincides with the Riemannian one is useful in sub-Riemannian geometry, where a canonical volume only exists in certain cases. A new geometric theory of heat is emerging by applying geometric mechanics tools extended for statistical mechanics, for example, the Lie groups thermodynamics.

Selection rules and dispersion of GaAs/AlAs multiple-quantum-well optical phonons studied by Raman scattering in right-angle, forward, and backscattering in-plane geometries

1995 ◽  
Vol 51 (20) ◽  
pp. 14448-14458 ◽  
Author(s):  
A. Fainstein ◽  
P. Etchegoin ◽  
M. P. Chamberlain ◽  
M. Cardona ◽  
K. Tötemeyer ◽  
...  
Keyword(s):  
Quantum Well ◽  
Raman Scattering ◽  
Multiple Quantum Well ◽  
Multiple Quantum ◽  
Optical Phonons ◽  
Selection Rules
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