Temperature-dependent characteristics of peripheral nerves exposed to different thermal conditions in the same animal

1970 ◽  
Vol 48 (1) ◽  
pp. 75-81 ◽  
Author(s):  
L. Keith Miller
Keyword(s):  
Peripheral Nerves ◽  
Action Potentials ◽  
Castor Canadensis ◽  
Thermal Conditions ◽  
Temperature Dependent ◽  
Deep Body Temperature ◽  
Cold Adapted ◽  
Refractory Periods ◽  
Phrenic Nerves ◽  
Deep Body

Beaver (Castor canadensis) caudal nerves, accustomed to tissue temperatures approaching 0 °C, were compared with nerves that encounter less severe cooling (tibial), and nerves that are accustomed only to deep body temperature (phrenic). Caudal nerves invariably conducted action potentials until freezing at about −5 °C. Tibial nerves ceased conducting at 0 °C and phrenic nerves failed at 4.5 °C. Conduction velocity – temperature slopes of the three nerves were different and absolute refractory periods in the cold-adapted nerves were significantly shorter at low temperature. Results furnish additional proof of cold adaptation in peripheral nerve.

Evaluation of a newly developed monitor of deep body temperature

2002 ◽  
Vol 16 (4) ◽  
pp. 354-357 ◽  
Author(s):  
Michiaki Yamakage ◽  
Sohshi Iwasaki ◽  
Akiyoshi Namiki
Keyword(s):  
Body Temperature ◽  
Deep Body Temperature ◽  
Deep Body

Circadian rhythm abnormalities of deep body temperature in depressive disorders

1992 ◽  
Vol 26 (3) ◽  
pp. 191-198 ◽  
Author(s):  
Kazushi Daimon ◽  
Naoto Yamada ◽  
Tetsushi Tsujimoto ◽  
Saburo Takahashi
Keyword(s):  
Circadian Rhythm ◽  
Body Temperature ◽  
Depressive Disorders ◽  
Deep Body Temperature ◽  
Deep Body

Thermal Stress and the Contribution of Radiant Heat

1980 ◽  
Vol 66 (1) ◽  
pp. 45-49
Author(s):  
D. J. Smith
Keyword(s):  
Radiant Heat ◽  
The Other ◽  
Endurance Time ◽  
Deep Body Temperature ◽  
Cardiovascular Stress ◽  
Globe Temperature ◽  
Climatic Severity ◽  
The Relationship ◽  
Deep Body ◽  
Different Climates

AbstractSixteen young, healthy volunteers were exposed to eight thermally severe environments, each subject being exposed to four different climates. Four climates had a radiant heat component; globe temperature some 10°C above dry bulb. In the other four climates, the globe temperature was close to the dry bulb. Measurements of endurance time in the different climates were made, as were changes in deep body temperature and heart rate. The relationship between the wet bulb globe thermometer index (WBGT) and stay times in the non-radiant climates agreed well with that of previous workers. Further, the WBGT index appeared adequate, in the situation under study, in terms of its ability to quantify climatic severity, thermal and cardiovascular stress and hence endurance in climates with a high radiant heat component.

Hypothalamic temperature and deep body temperature during copulation in the male rat

1987 ◽  
Vol 39 (3) ◽  
pp. 367-370 ◽  
Author(s):  
Mark S. Blumberg ◽  
Julie A. Mennella ◽  
Howard Moltz
Keyword(s):  
Body Temperature ◽  
Male Rat ◽  
Hypothalamic Temperature ◽  
Deep Body Temperature ◽  
Deep Body

Trivariant Lagrange Factor Polynomial for Discrete Rayleigh Distributed Reliability Analysis of Aeroengine Combustion Chamber Cylinder

2013 ◽  
Vol 10 (1) ◽  
Author(s):  
Chun Nam Wong ◽  
Yang Lu
Keyword(s):  
Combustion Chamber ◽  
Thermal Conditions ◽  
Economic Factors ◽  
Structural Variants ◽  
Temperature Dependent ◽  
Application Range ◽  
Linear Polynomial ◽  
As Stress ◽  
Stress Dependent ◽  
Dependent Probability

In most of the existing stress-strength interference (SSI) models, stress and strength are assumed to be independent structural variants. However, under severe thermal conditions, such as in aeroengine combustion chamber, this assumption may not hold. One structural variant, such as strength, may become unilateral dependent on another variant, such as stress or temperature. In addition, to evaluate the discrete reliability of structures using unilateral dependent structural variants, discrete SSI models were developed using not just linear polynomial or line segments, but higher order polynomials. These models are based on the trivariant Lagrange factor polynomial approach. Normal distributed temperature dependent stress and Rayleigh distributed thermal stress dependent strength are represented by discrete structural variants that possess unilateral dependent probability mean functions. Based on their dependence formulations, the trivariant Lagrange factor polynomial of the discrete SSI model was generated. Applicability of this method was validated by a specific aeroengine combustion chamber cylinder using different molding alloys. Meanwhile the application range of some existing SSI models is extended for interval shifted data. Comparing machinability, reliability, and economic factors, 1Cr11MoV was the most suitable alloy in the design.

SPH Analysis for Transient Thermal Stress of FGMs with Temperature-Dependent Properties

2015 ◽  
Vol 1096 ◽  
pp. 297-301
Author(s):  
Gui Ming Rong ◽  
Hiroyuki Kisu
Keyword(s):  
Thermal Stress ◽  
Thermal Conditions ◽  
Functionally Graded ◽  
Temperature Dependent ◽  
Graded Materials ◽  
Initial Stage ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Temperature Dependent Properties ◽  
Transient Thermal

A formulation using the deviatoric stress and the continuity equation is extended to the analysis of the dynamic response of functionally graded materials (FGMs) subjected to a thermal shock by smoothed particle hydrodynamics (SPH), in which temperature dependent properties of materials are considered. Several dynamic thermal stress problems are analyzed to investigate the fluctuation of thermal stress at the initial stage under three types of thermal conditions, with the addition of two kinds of mechanical boundary conditions.

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