Chikara Amano

Antenna Effect of Human Bodies towards Electromagnetic Waves in Space. II

As an extension of the previous reports on the antenna effect of the human bodies towards electromagnetic fields in space, various phenomena due to the interaction of the electromagnetic fields with the human bodies, including frequency response characteristics of the human body as a receiving antenna, and dependence of the induced voltages on individuals or on the sorts of footwears are presented. These phenomena are applied to the study of adventitious sources of electromagnetic fields in space such as visual terminals and fluorescent lamps

Closed-shell numbers and two-dimensional rare gas microclusters

Abstract The binding energy and the sublimation energy of two-dimensional rare gas microclusters have been calculated by the steepest gradient descent method, a kind of molecular dynamics simulation, up to 92 atoms. The stable structure of the microclusters is based on hexagonal forms. Unlike the three- dimensional case, most of the microclusters with closed-shell numbers 19, 37, 61, 91 in the hexagonal model do not show the property of magic numbers. The magic number 7 and the even–odd alternation in the range of 9–18 atoms have been reconfirmed. By a definition of the film, the minimal number of constituent atoms in a film has been estimated to be 6000. For Lennard–Jones microclusters, the contribution of remote atomic pairs other than the nearest neighbor ones to the total energy is significant, which results in the reduction of the interatomic distance from the equilibrium value for the Lennard–Jones potential.

Measurement of Reflected and Scattered Light for Monitoring Fluctuation of Structures

Abstract A laser spectroscopic technique for studying fluctuations of structural objects is presented, together with some results of our investigations including an observation of forced vibration of a refrigerator, intrinsic vibrations of buildings, and appearance of a fluctuation in rotational speed due to fatigue. An alternative detection technique which uses the scattered light for monitoring in place of the mirror-reflected beam is also presented. A leak of water out of a pipeline was detected with this method. The results obtained with this laser spectroscopic technique should form a useful collection of data regarding fluctuation analysis of various objects.