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Journal of Thermodynamics
Journal Prestige (SJR): 0.201

Citation Impact (citeScore): 1
Number of Followers: 9

This is an Open Access Journal

Open Access journal
ISSN (Print) 1687-9244 - ISSN (Online) 1687-9252
Published by Hindawi

[339 journals]

Using Thermodynamic Degradation Approach to Quantify Human Stress Response
- Abstract: The present study provides a thermodynamic degradation approach to model human stress response. Finger skin temperature was used as an indicator of stress response to a stressor (or stressful event) followed by a recovery. The entropy change () is calculated using heat transfer () from the peripheral skin and finger skin temperature (). It was hypothesized that the human stress response, as evidenced by finger skin temperature change, is a quasi-static process. The entropy approach is demonstrated using data from a medical school experimental study. The finger skin temperature was measured under three conditions (relaxation, stressor task, and recovery) during the physiological test profile. The entropy change () is postulated as entropy damage (), which is a metric for measuring the aging or system degradation. The aging-ratio, , that is, the ratio of entropy change due to stressor to that of recovery, is presented for both male and female subjects. The statistical -tests demonstrate statistical significance in human stress response to stressor and recovery states within and between male and female subjects. This novel approach could be valuable to medical researchers, particularly in the field of occupational health to evaluate human exposure to stressful environments.
  PubDate: Mon, 11 Sep 2017 09:02:08 +000
Thermodynamics of Low-Dimensional Trapped Fermi Gases
- Abstract: The effects of low dimensionality on the thermodynamics of a Fermi gas trapped by isotropic power-law potentials are analyzed. Particular attention is given to different characteristic temperatures that emerge, at low dimensionality, in the thermodynamic functions of state and in the thermodynamic susceptibilities (isothermal compressibility and specific heat). An energy-entropy argument that physically favors the relevance of one of these characteristic temperatures, namely, the nonvanishing temperature at which the chemical potential reaches the Fermi energy value, is presented. Such an argument allows interpreting the nonmonotonic dependence of the chemical potential on temperature, as an indicator of the appearance of a thermodynamic regime, where the equilibrium states of a trapped Fermi gas are characterized by larger fluctuations in energy and particle density as is revealed in the corresponding thermodynamics susceptibilities.
  PubDate: Thu, 26 Jan 2017 09:40:51 +000

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