scholarly journals Volume dependence of Fisher's zeros

2009 ◽  
Author(s):  
Yuzhi Liu ◽  
Alan Denbleyker ◽  
Daping Du ◽  
Yannick Meurice ◽  
Alexander Velytsky
Keyword(s):  
Volume Dependence ◽  
Fisher's Zeros

VOLUME DEPENDENCE OF OPTICAL TRANSITIONS IN GaAs : PHOTOMODULATED REFLECTIVITY

1984 ◽  
Vol 45 (C8) ◽  
pp. C8-57-C8-60 ◽  
Author(s):  
M. Hanfland ◽  
K. Syassen ◽  
N. E. Christensen
Keyword(s):  
Optical Transitions ◽  
Volume Dependence

Volume dependence of high-Tc superconductors

1988 ◽  
Vol 153-155 ◽  
pp. 403-404
Author(s):  
R. Griessen ◽  
A. Driessen ◽  
H. Hemmes ◽  
R. Wijngaarden
Keyword(s):  
High Tc Superconductors ◽  
High Tc ◽  
Volume Dependence

Flow and volume dependence of expiratory resistance in anesthetized cats

1989 ◽  
Vol 67 (3) ◽  
pp. 1013-1019 ◽  
Author(s):  
M. Skaburskis ◽  
F. Shardonofsky ◽  
J. Milic-Emili
Keyword(s):  
Respiratory System ◽  
Volume Flow ◽  
Flow Profile ◽  
Pressure Flow ◽  
Lung Inflation ◽  
Mechanically Ventilated ◽  
Volume Dependence ◽  
Flow Dependence ◽  
Lung Deflation ◽  
Respiratory Muscle Activity

In five anesthetized paralyzed cats, mechanically ventilated with tidal volumes of 36–48 ml, the isovolume pressure-flow relationships of the lung and respiratory system were studied. The expiratory pressure was altered between 3 and -12 cmH2O for single tidal expirations. Isovolume pressure-flow plots for three lung volumes showed that the resistive pressure-flow relationships were curvilinear in all cases, fitting Rohrer's equation: P = K1V + K2V2, where P is the resistive pressure loss, K1 and K2 are Rohrer's coefficients, and V is flow. Values of K1 and K2 declined with lung inflation, consistent with the volume dependence of pulmonary (RL) and respiratory system resistances (Rrs). During lung deflation against atmospheric pressure, RL and Rrs tended to remain constant through most of expiration, resulting in a nearly linear volume-flow relationship. In the presence of a fixed respiratory system elastance, the shape of the volume-flow profile depended on the balance between the volume and the flow dependence of RL and Rrs. However, the flow dependence of RL and Rrs indicates that their measured values will be affected by all factors that modify expiratory flow, e.g., respiratory system elastance, equipment resistance, and the presence of respiratory muscle activity.

scholarly journals Limits of the quasiharmonic approximation in MgO: Volume dependence of optical modes investigated by infrared reflectivity and ab initio calculations

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
Eugenio Calandrini ◽  
Lorenzo Paulatto ◽  
Daniele Antonangeli ◽  
Fei He ◽  
Ricardo P. S. M. Lobo ◽  
...  
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Infrared Reflectivity ◽  
Volume Dependence ◽  
Quasiharmonic Approximation ◽  
Optical Modes

A-initio Calculation of the Volume Dependence of the Resistivity of Aluminium

1987 ◽  
Vol 144 (2) ◽  
pp. K119-K123 ◽  
Author(s):  
G. J. Vázquez ◽  
L. F. Magaña
Keyword(s):  
Volume Dependence

Influence of lung volume dependence of upper airway resistance during continuous negative airway pressure

1994 ◽  
Vol 77 (2) ◽  
pp. 840-844 ◽  
Author(s):  
F. Series ◽  
I. Marc
Keyword(s):  
Lung Volume ◽  
Airway Pressure ◽  
Airway Resistance ◽  
Upper Airway ◽  
Random Order ◽  
Pressure Increase ◽  
Nasal Mask ◽  
Upper Airway Resistance ◽  
Volume Dependence ◽  
Negative Airway Pressure

To quantify the contribution of lung volume dependence of upper airway (UA) on continuous negative airway pressure (CNAP)-induced increase in upper airway resistance, we compared the changes in supralaryngeal resistance during an isolated decrease in lung volume and during CNAP in eight normal awake subjects. Inspiratory supralaryngeal resistance was measured at isoflow during four trials, during two CNAP trials where the pressure in a nasal mask was progressively decreased in 3- to 5-cmH2O steps and during two continuous positive extrathoracic pressure (CPEP) trials where the pressure around the chest (in an iron lung) was increased in similar steps. The CNAP and CPEP trials were done in random order. During the CPEP trial, the neck was covered by a rigid collar to prevent compression by the cervical seal of the iron lung. In each subject, resistance progressively increased during the experiments. The increase was linearily correlated with the pressure increase in the iron lung and with the square of the mask pressure during CNAP. There was a highly significant correlation between the rate of rise in resistance between CNAP and CPEP: the steeper the increase in resistance with decreasing lung volume, the steeper the increase in resistance with decreasing airway pressure. Lung volume dependence in UA resistance can account for 61% of the CNAP-induced increase in resistance. We conclude that in normal awake subjects the changes in supralaryngeal resistance induced by CNAP can partly be explained by the lung volume dependence of this resistance.

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