scholarly journals Local volume effects in the generalized pseudopotential theory

2019 ◽  
Vol 99 (21) ◽  
Author(s):  
Guy C. G. Skinner ◽  
Anthony T. Paxton ◽  
John A. Moriarty
Keyword(s):  
Pseudopotential Theory ◽  
Local Volume ◽  
Volume Effects

Interionic Pair Potential, hard sphere diameter and entropy of mixing of NaCd compound forming binary molten alloys under the framework of Pseudopotential theory

2014 ◽  
Vol 10 (6) ◽  
pp. 2843-2852
Author(s):  
Sujeet Kumar Chatterjee ◽  
Lokesh Chandra Prasad ◽  
Ajaya Bhattarai
Keyword(s):  
Nearest Neighbor ◽  
Effective Interaction ◽  
Pair Potential ◽  
Sphere Diameter ◽  
Compound Formation ◽  
Pseudopotential Theory ◽  
Energy Of Mixing ◽  
Asymmetric Behaviour ◽  
Statistical Mechanical ◽  
Free Energy Of Mixing

The observed asymmetric behaviour of mixing of  NaCd liquid alloys around equiatomic composition with smaller negative values for free energy of mixing at compound forming concentration, i.e. GMXS = -4.9KJ at Ccd =0.66 has  aroused our interest to undertake a theoretical investigation of this system.A simple statistical mechanical theory based on compound formation model has been used to investigate the energetics of formation of intermetallic compound Cd2Na in the melt through the study of entropy of mixing.Besides, the interionic interactions between component atoms Na and Cd of the alloys have been understood through the study of interionic pair potential фij(r), calculated from pseudopotential theory in the light of CF model.Our study of фij(r) suggest that the effective interaction between Na-Na atoms decreases on alloying with Cd atom, being minimum for compound forming alloy( Cd 0.66 Na 0.34 ).The nearest neighbor distance between Na-Na atoms does not alter on alloying. Like wise Na-Na,  effective interaction between  Cd-Cd atom decreases from pure state to NaCd alloys, being smaller at compound forming  concentration Cd 0.66 Na 0.34.The computed values of SM from pseudopotential theory are positive at all concentrations, but the agreement between theory and experimental is not satisfactory. This might be happening due to parameterisation of σ3 and Ψcompound.

Sampling Volume Effects on Determining Salt in a Soil Profile1

1983 ◽  
Vol 47 (6) ◽  
pp. 1265 ◽  
Author(s):  
H. M. Hassan ◽  
A. W. Warrick ◽  
A. Amoozegar-Fard
Keyword(s):  
Sampling Volume ◽  
Volume Effects

Futures Price Variability: A Test of Maturity and Volume Effects

1986 ◽  
Vol 59 (2) ◽  
pp. 319 ◽  
Author(s):  
Theoharry Grammatikos ◽  
Anthony Saunders
Keyword(s):  
Price Variability ◽  
Futures Price ◽  
Volume Effects

scholarly journals More on the flavor dependence of mϱ/fπ

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Andrey Yu. Kotov ◽  
Daniel Nogradi ◽  
Kalman K. Szabo ◽  
Lorinc Szikszai
Keyword(s):  
Gauge Theory ◽  
Symmetry Breaking ◽  
Finite Volume ◽  
Continuum Limit ◽  
Low Energy ◽  
Translational Symmetry ◽  
Fundamental Representation ◽  
Staggered Fermions ◽  
Link Type ◽  
Volume Effects

Abstract In previous work, [arXiv:1905.01909], we have calculated the mϱ/fπ ratio in the chiral and continuum limit for SU(3) gauge theory coupled to Nf = 2, 3, 4, 5, 6 fermions in the fundamental representation. The main result was that this ratio displays no statistically significant Nf-dependence. In the present work we continue the study of the Nf-dependence by extending the simulations to Nf = 7, 8, 9, 10. Along the way we also study in detail the Nf-dependence of finite volume effects on low energy observables and a particular translational symmetry breaking unphysical, lattice artefact phase specific to staggered fermions.

scholarly journals Evaluation of nuclear medicine planar images based on partial volume effects and recovery coefficients at different activity levels of radionuclides and matrix sizes

2021 ◽  
Vol 1106 (1) ◽  
pp. 012015
Author(s):  
Mohd Fahmi Mohd Yusof ◽  
Nor Amalyna Ghazali ◽  
Ummi Solehah Ab Ghani ◽  
Ahmad Thaifur Khaizul ◽  
Puteri Nor Khatijah Abd Hamid
Keyword(s):  
Nuclear Medicine ◽  
Activity Levels ◽  
Partial Volume ◽  
Partial Volume Effects ◽  
Planar Images ◽  
Volume Effects

scholarly journals Thalamic morphology predicts the onset of freezing of gait in Parkinson’s disease

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Nicholas D’Cruz ◽  
Griet Vervoort ◽  
Sima Chalavi ◽  
Bauke W. Dijkstra ◽  
Moran Gilat ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Resting State ◽  
Freezing Of Gait ◽  
Study Entry ◽  
Resting State Functional Connectivity ◽  
Behavioral Correlates ◽  
Local Volume ◽  
Linear Evolution ◽  
Risk Of Falls

AbstractThe onset of freezing of gait (FOG) in Parkinson’s disease (PD) is a critical milestone, marked by a higher risk of falls and reduced quality of life. FOG is associated with alterations in subcortical neural circuits, yet no study has assessed whether subcortical morphology can predict the onset of clinical FOG. In this prospective multimodal neuroimaging cohort study, we performed vertex-based analysis of grey matter morphology in fifty-seven individuals with PD at study entry and two years later. We also explored the behavioral correlates and resting-state functional connectivity related to these local volume differences. At study entry, we found that freezers (N = 12) and persons who developed FOG during the course of the study (converters) (N = 9) showed local inflations in bilateral thalamus in contrast to persons who did not (non-converters) (N = 36). Longitudinally, converters (N = 7) also showed local inflation in the left thalamus, as compared to non-converters (N = 36). A model including sex, daily levodopa equivalent dose, and local thalamic inflation predicted conversion with good accuracy (AUC: 0.87, sensitivity: 88.9%, specificity: 77.8%). Exploratory analyses showed that local thalamic inflations were associated with larger medial thalamic sub-nuclei volumes and better cognitive performance. Resting-state analyses further revealed that converters had stronger thalamo-cortical coupling with limbic and cognitive regions pre-conversion, with a marked reduction in coupling over the two years. Finally, validation using the PPMI cohort suggested FOG-specific non-linear evolution of thalamic local volume. These findings provide markers of, and deeper insights into conversion to FOG, which may foster earlier intervention and better mobility for persons with PD.

Gelation of micellar solutions of diblock-copoly (oxyethylene/oxybutylene) in aqueous K2SO4. An investigation of excluded volume effects

1995 ◽  
Vol 33 (7) ◽  
pp. 1085-1096 ◽  
Author(s):  
Nan-Jie Deng ◽  
Yun-Zhu Luo ◽  
Siriporn Tanodekaew ◽  
Nicole Bingham ◽  
David Attwood ◽  
...  
Keyword(s):  
Excluded Volume ◽  
Micellar Solutions ◽  
Excluded Volume Effects ◽  
Volume Effects
Sign in / Sign up

Export Citation Format

Share Document