Results 301 to 310 of about 3,042,639 (351)
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Problems in the Ratio Measurement of Life Stress
Journal of Health and Social Behavior, 1976The development and use of Holmes and Rahe's Social Readjustment Rating Scale is examined. The scale is regarded as a laudable attempt at ratio measurement and as deserving more attention and emulation in sociology than it has received. However, there are problems with the work of Rahe and his associates.
R L, Hough, D T, Fairbank, A M, Garcia
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Convergence of Stress-Ratio Method
Journal of the Engineering Mechanics Division, 1981The stress-ratio equations can be derived from fully-loaded conditions. The technique is therefore always a first order iterative method and under certain conditions, second order. All intermediate designs are within the iterations subspace which constitutes a small part of the design space.
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Stress Ratio and Stress Trajectory Simulations for Devonian Gas Shales
SPE Unconventional Gas Recovery Symposium, 1984ABSTRACT A brief review of selected in situ stress studies is presented. Pertinent geomechanical factors and rationale for stress trajectory characterizations are discussed in the context of natural fracturing in geological formations. Examples with structural cross sections incorporating the influence of the Rome Trough are identified ...
S.H. Advani +3 more
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Multiple Fully Stressed Structural Designs and the Stress Ratio Method
Computer-Aided Civil and Infrastructure Engineering, 1995Abstract: Some structures are capable of being proportioned in several different ways such that each one is a fully stressed design. This paper investigates the nature of these multiple fully stressed designs, the relationships that exist between them, and the behavior of the stress ratio method when applied to the sizing of such structures.
Scott A. Burns +2 more
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Effect of stress ratio on effective stress range ratio and crack growth in 6061-T6 Al-alloy
International Journal of Pressure Vessels and Piping, 1988Abstract Crack closure experiments using a COD gauge were performed on 6061-T6 Al-alloy, for various stress ratios. Experimental results show that for a given stress ratio, R , the crack length increases up to 1 mm after which it is stabilized. On the basis of the experimental results a model for effective stress range ratio U , which was ...
Raghuvir Kumar, S.B.L. Garg
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The positivity ratio and functioning under stress
Stress and Health, 2010AbstractThe positivity ratio reflects the ratio of positive affect to negative affect. In two studies, the authors investigated the relationship between positivity ratio and functioning under stress. Study 1 examined gastric cancer patients (N = 123) and Study 2 explored hospital personnel exposed to missile attacks (N = 84). In both studies, there was
Amit Shrira +6 more
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Privation, stress, and human sex ratio at birth
Early Human Development, 2015This article reviews the growing interdisciplinary literature on the effect of privation and stress on human sex ratio at birth. Borrowing strength from the potential outcomes causal analysis framework, the discussion focuses on the issues of study design and identification strategy and how they have influenced the current state of the field.
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Fatigue crack growth discrepancies with stress ratio
Theoretical and Applied Fracture Mechanics, 2009Abstract This paper examines cracking in D6ac and 4340 steel along with Mil Annealed and STOA Ti–6Al–4V and finds that the data implies that in the Paris Region (Region II) of the crack growth curve there is only a minimal R ratio dependency.
R. Jones, B. Farahmand, C.A. Rodopoulos
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The Q-t rAtio in Treadmill Stress Testing
Angiology, 1971An evaluation of the Q-T ratio as a means of differentiating normal from abnormal tread mill stress test results was attempted. Digitalized subjects were included in the study to determine if false-positive treadmill stress test results could be identified by this means.
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Mean stress effect correction using constant stress ratio S–N curves
International Journal of Fatigue, 2013Abstract This paper presents a stress based approach to take into account the influence of the mean stress value on fatigue strength of constructional materials. Elaborated model uses two S–N curves, i.e. for alternating stress (R = −1) and another one obtained under stress ratio R ≠ −1, for calibrating the equations of boundary condition.
Adam Niesłony, Michał Böhm
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