Results 51 to 60 of about 1,796,570 (98)

Variational optimization of the 2DM: approaching three-index accuracy using extended cluster constraints

open access: yes, 2014
The reduced density matrix is variationally optimized for the two-dimensional Hubbard model. Exploiting all symmetries present in the system, we have been able to study $6\times6$ lattices at various fillings and different values for the on-site ...
De Baerdemacker, Stijn   +4 more
core   +1 more source

Partitioning of the molecular density matrix over atoms and bonds

open access: yes, 2010
A double-index atomic partitioning of the molecular first-order density matrix is proposed. Contributions diagonal in the atomic indices correspond to atomic density matrices, whereas off-diagonal contributions carry information about the bonds.
Ayers, Paul W.   +4 more
core   +1 more source

Does A Short, Thick Neck Predict Obstructive Sleep Apnea?: The Role of Physical Examination in OSA Screening [PDF]

open access: yes, 2016
Purpose: The purpose of this study was to determine whether a short neck, alone or together with a thick neck, can predict obstructive sleep apnea (OSA).
Daskalakis, Sc.D., Constantine   +4 more
core   +1 more source

The Popularity Function: A Spurious Regression? The Case of Austria

open access: yes, 2016
In this paper we apply the unit root and cointegration methodology of modern econometric time series analysis to estimated popularity functions for the Austrian parties in government since the mid-1970s. We find no evidence for and rather strong evidence
Neck, Reinhard, Schneider, Friedrich
core  

Correlation analysis between neck muscles and lifestyle habits in patients with cervical instability. [PDF]

open access: yesBMC Musculoskelet Disord
Lu G   +11 more
europepmc   +1 more source

<i>Super</i>-Superselective Level VB Neck Dissection for Papillary Thyroid Cancer. [PDF]

open access: yesCancers (Basel)
Hartl DM   +6 more
europepmc   +1 more source

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