Results 51 to 60 of about 276 (126)

A Novel Method to Calculate Nonlocal Symmetries from Local Symmetries

open access: yes
We explore nonlocal symmetries in a class of Hamiltonian dynamical systems governed by second-order differential equations. Specifically, we establish an algorithm for deriving nonlocal symmetries by utilizing the Jacobi metric and the Eisenhart&ndash ...
Andronikos Paliathanasis
core   +1 more source

Depressed mood amplifies heart-related symptoms in persistent and paroxysmal atrial fibrillation patients:a longitudinal analysis-data from the German Competence Network on Atrial Fibrillation

open access: yes, 2015
AIMS: There is limited evidence of an association between the burden of atrial fibrillation (AF)-related symptoms and depressed mood (DM). We used follow-up data from two randomized trials to relate AF symptoms, perceived AF burden, and DM.METHODS AND ...
Goette, A.   +13 more
core   +2 more sources

Adoption of clothing fashions by college women

open access: yes, 1972
This thesis was undertaken toward developing a better understanding of the processes by which college women adopt fashion apparel. The main objectives of the study were to identify and profile the innovator and also to determine the adoption process by a
Eisenhart, Forrest H., 1939-
core  

The twistor description of integrable systems [PDF]

open access: yes, 1991
The theory of twistors and the theory of integrable models have, for many years, developed independently of each other. However, in recent years it has been shown that there is considerable overlap between these two apparently disparate areas of ...
Strachan, Ian Alexander Becket
core  

Geometrical Aspects in the Analysis of Microcanonical Phase-Transitions. [PDF]

open access: yesEntropy (Basel), 2020
Bel-Hadj-Aissa G   +4 more
europepmc   +1 more source

THE MARKET DRIVEN TRADE LIBERALIZATION AND EAST ASIAN REGIONAL INTEGRATION [PDF]

open access: yes
This paper creates a new index (“index of bilateral trade relation”) to quantitatively evaluate the degree of regional economic integration based on countries’ de facto bilateral trade relations.
Lurong Chen
core  

Curves in the Minkowski plane and Lorentzian surfaces [PDF]

open access: yes, 2012
We investigate in this thesis the generic properties of curves in the Minkowski plane R2 1 and of smooth Lorentzian surfaces. The generic properties of curves in R2 1 are obtained by studying the contacts of curves in R2 1 with lines and pseudo-circles ...
SALOOM, AMANI
core  

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