Stress INDEX

Concurrent bombardment during film growth affects film properties such as the film—substrate adhesion, density, surface area, porosity, surface coverage, residual film stress, index of refraction, and electrical resistivity. In reactive ion plating, the use of concurrent bombardment allows the deposition of stoichiometric, high density films of compounds such as TiN, ZrN, and Zr02 at low substrate temperatures. 

The WBGT heat stress index is calculated inside buildings and outside buildings without solar load as... 

Heat stress index An index devised by Belding and Hatch to determine the effect of extreme heat stress. 

Solids Fraction % Behavior Index, n (-) Consistency Yield Stress Index, K croc (Pa s") (Pa) Casson Visosity, r ca (Pa s) Serum Visosity (mPa s)... 

Harris, P. E. (1989). The nurse stress index. Work and Stress 3 335-46. 

An indirect measure of stress can be made by determining levels of all physical and chemical stressors in the environment. However, not only is this an expensive proposition, but it is not easy to translate these physical measurements into a stress index. It would be much better to directly measure the level of stress in the living fish. 

Hydrologists have adopted the concept of a water stress index" based on an approximate minimum level of water required per capita to maintain an adequate quality of life in a moderately developed country in an arid zone. Although the indicators are only approjimate, it has been found that a country or region whose renewable fresh water availability exceeds about 1700-2000 m per person per year will suffer only occasional or local water problems. Below this threshold the lack of water begins to become a serious problem. Two rough benchmark levels have been adopted ... 

FIGURE 41.17. Engineering or nominai stress (index n) and true stress (index 0 as a function of engineering strain e for a PLC simulated by molecular dynamics after [132],... 

Heat Stress Index The HSI compares two theoretical sweat evaporation conditions. HSI compares the amount of sweat that must be evaporated to balance the heat loss equation (Equation (18-1)) for a given set of environmental conditions to the maximum amount of sweat that can actually evaporate for those conditions ... 

Compute the heat stress index for the following conditions and determine if any precautions are warranted ... 

Heat Stress Index (HSl) can be calculated or obtained from charts and takes into account clothing and work rate, and from it can be obtained recommended durations of work and rest periods. 

When a fatigue evaluation is required, it is necessary to determine the peak stresses around the openings. The current methods are the stress index method, experimental tests and measurements, or a theoretical analysis procedure such as a finite element analysis. The stress index method is the easiest method and is allowed by the ASME Code, III-l and VIII-2. The stress index method was developed from reviewing a large amount of experimental and analytical data determined in a program conducted by the Pressure Vessel Research Committee. 

The stress index method permits easy calculation of peak stresses at the nozzle-shell or nozzle-head intersection without resorting to any complex analysis. The stress mdex method gives conservative results and if the exact multipliers for a specific geometry are known, they should be used. Essentially, the nominal stress in the shell or head is multiplied by the stress indices and the peak stresses are obtained. 

The peak stresses are determined from the following equations where the stress index I is multiplied times the nominal stress. 

I = stress index for various locations (see Table 11.5) cr = normal stress in plane being examined (psi) ov = tangential stress in plane being examined (psi)... 

The peak stresses are determined as follows using the factors for stress index I from Table 11.5 ... 

Because eq. 6.2.27 depends on both choice of constitutive equation and idealization of the deformation, it seems unwise to rely on capillary die swell data to measure normal forces. However, such data are useftil as normal stress indexes for comparing materials. 

In turn, is a function of the DMT material index, and horizontal stress index, Ko-... 

Abidin, R. R. (1995). Parenting Stress Index Professional manual (3rd ed.). Odessa, FL Psychological Assessment Resources. 

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