Stem thermocouple hygrometers were subjected to transient and stable thermal gradients while in contact with reference solutions of NaCl. Both dew point and psychrometric voltages were directly related to zero offset voltages, the latter reflecting the size of the thermal gradient. Although slopes were affected by absolute temperature, they were not affected by water potential. One hygrometer r...

Abstract Machine vision technology is an interdisciplinary subject involving plenty of fields such as artificial intelligence, neurobiology, psychophysics, computer science, image processing and pattern recognition, etc. In recent years, with rapid development the technology, machine recognition widely used in many detection control. For thermo-hygrometers calibration, manual operation method t...

A strip of paper placed on a hand spontaneously curls upwards. This simple observation illustrates the ability of a relatively homogeneous hygroscopic structural material, paper, to sense and respond to the microclimate near a non-equilibrium system, a moist evaporative boundary layer. We quantify this interaction using a simple experiment and show that it can be understood in terms of a minima...

Water vapor observations by chilled-mirror hygrometers were conducted at Bandung, Indonesia (6.90S, 107.60E) and Tarawa, Kiribati (1.35N, 172.91E) in December 2003 to examine the efficiency of dehydration during horizontal advection in the tropical tropopause layer (TTL). Trajectory analyses based on bundles of isentropic trajectories suggest that the modification of air parcels’ identity due t...