Grounded measurement

Laboratory measurements are primarily concerned with tread compound traction properties. Tread pattern and other tire parameters like cornering and longitudinal slip stiffness require still tests with tires on either large indoor machines or direct proving ground measurements. 

The highest indoor Rn-226 concentrations occur in areas with alum shale in the ground. Measurements in these areas yield a good agreement between exhalation rates and indoor Rn-222 concentrations. Even in granite areas, high indoor Rn-222 concentrations may occur, but no extreme values were found in such areas. These findings are also confirmed by the field studies. 

Electrical Potential the electrical potential energy of charged body above ground measured in volts... 

The Problem How tall is a tree if a kite string stretched from the top of the tree to a point on the ground measures 39 feet, and the distance from the base of the tree to that same point on the ground measures 36 feet (Will you be able to put your star on the top of the tree if you can reach 20 feet high )... 

Fig. 1. HF ground measurements. Reduced to average mixing ratio above 20 km. A, Jungfraujoch O, Kitt Peak.

Circular currents cannot be influenced by grounding measures. The size of the current depends on the size of the windings and the steepness of voltage slope in pulsed motor voltage. Thus, circular currents can be reduced by a filter between the frequency converter and the motor. This effect has practical significance for frame sizes above 280. 

The network of 211 weather stations allows measurement of tens of basic weather parameters, the most important of which include air temperature, atmospheric pressure, air humidity, wind speed and wind direction. Among the other parameters measured are cloud base height (laser-measured), amount of precipitation (rain or snow), visibility, and air temperature near the ground. Measurements are performed in enclosed areas within the weather stations. 

Column densities of ethane and acetylene in the atmosphere were determined by ground measurements of the solar spectrum in the X 8-10/ m range. ... 

Once a release has occurred the most useful measurements will typically be those of external gamma dose rates in the plume and external gamma dose rates in air arising from the deposition of radionuclides on the ground. Measurements of these types can be made most easily and rapidly from airborne platforms, if available. Otherwise, measurements of external gamma... 

NF P90-106 December 1992 Sports grounds. Measurement of the skidding conditions of a surface with a tnction pendulum. 

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