conclusions the results showed that the heat stress increased by increasing air velocity and humidity in both groups. the air velocity with high humidity can be considered as a positive factor in the occurrence of heat strain. therefore, the incidence of heat stress decreases with the increase of humidity and reduction of air velocity or with increase of air velocity and reduction of humidity i...

In order to understand the details of the flow field in the microand nanofluidic devices, it is necessary to measure the three-dimensional velocity field under a microscopy. Thus, the development of a new measuring technique for the three-dimensional velocity by a single camera is strongly needed. One solution is the use of holography, but it has been known that the resolution in the depth dire...

It is shown that the measurement of a change in a photon frequency in the gravitational redshift experiment is in fact an indirect measurement of a change in the photon local velocity since both frequency and velocity change in this experiment. This means that the local velocity of a photon depends upon its pre-history (whether it has been emitted at the observation point or at a point of diffe...

If isotropy of space and homogeneity of space and time are the valid laws of nature then one can show that velocity of any signal (whether it is light in a vacuum or in a medium or something having constant velocity in the rest frame of the observer and by using which we can perform all (but not partial) measurements of all physical quantities related with the particular experiment) is constant...

We propose a point measurement technique for simultaneous gas temperature and velocity measurement based on thermographic phosphor particles dispersed in the fluid. The flow velocity is determined from the frequency of light scattered by BaMgAl10O17:Eu2+ phosphor particles traversing the fringes like in conventional laser Doppler velocimetry. Flow temperatures are derived using a two-color rati...

It has been overlooked that the wavelength of a photon in the gravitational redshift experiment cannot change along with its frequency due to the law of conservation of the photon momentum. As both frequency and velocity change in this experiment the measurement of a change in a photon frequency is in fact an indirect measurement of a change in the photon local velocity. This means that the loc...