A study was undertaken to determine whether involuntary user movement provides a basis for relaxing the measurement conditions for evaluating the potential optical radiation hazards to the eye from slit lamps and indirect ophthalmoscopes. This was accomplished by assessment of the extent to which light from these devices can be maintained in focus on a 1-mm-diameter fiber-optic cable for 45 s. ...

We critically study the possibility of quantum Zeno effect for indirect measurements. If the detector is prepared to detect the emitted signal from the core system, and the detector does not reflect the signal back to the core system, then we can prove the decay probability of the system is not changed by the continuous measurement of the signal and the quantum Zeno effect never takes place. Th...

Integrating sphere reflectometers are used in the majority of instruments used for spectral reflectance measurements of non-specular (scattering) samples. Knowledge of directional-hemispherical spectral reflectance (and transmittance, in the case of semi-transparent samples) allows one to derive the spectral directional emittance , which is of considerable practical interest for numerous heat t...

This paper analyzes the effects of market orientation from two perspectives. First, its direct influences on tourist agencies’ perceived performance, and its indirect ones on performance through the perceived value of market information. Second, direct effects on the perceived service quality offered by the firm and indirect influences derived from the utilization of quality measurement systems...

The capillary hydrostatic pressure of blood was measured indirectly. We used a microneedle to occlude exposed mesenteric capillaries in rats and frogs without trauma and then determined the motion of the trapped red blood cells that resulted from the absorption or filtration of water through the capillary wall. The trajectory of red cells was determined from enlarged timed photomicrographs that...

We consider direct techniques for measuring network-internal delays that rely on network routers as measurement nodes, and indirect techniques that rely on end-to-end measurements and infer delay distributions on the common internal paths. The direct technique does not require any additional infrastructure support, and can thus be directly applied to the analysis of network performance and the ...