Measurement of Emotional Response by Similarity in Patterns of Galvanic Skin Reflex

There is no doubt that many people feel the peace of mind or the pleasures of senses in appreciating music. But the estimation of the effect is very difficult and the objective estimation can be hardly done. This study proposed the objective estimating method of human emotion utilizing galvanic skin reflex (GSR) which reflects a human psychological activity. In this method, not by individual response, but by the series of response and pattern of appearance of GSR, the emotional response under appreciating music was investigated. In the case of appreciation of the same classic music to several subjects, the individual GSR responses are random and remarkable characteristic could not be find on the results. However, on the patterns of appearance of GSR, the patterns obtaining from the same generation are much similar each other and the patterns obtaining from different generation are less similar. It was cleared that the same music gave different effect on different generations

Transient Displacement Response to Pulse Excitations on Periodontal Tissues

In the field of dental study it is most fundamental and necessary to estimate the condition of periodontium. In order to examine a mechanical characteristics of periodontium, the theoretical displacement response to periodontal mechanical model (three elements model) are strictly solved in case of some pulse excitations. Impact excitations (rectangular, triangular and half-cycle sine pulse) are given in physical and mathematical definitions and complete solutions to the impact excitations are provided. The triangular pulse excitation which is obtained by means of a fracture of pencil-lead is most suitable. The mechanical parameters of periodontium are given using this input excitation. This is experimentally confirmed by artificial tooth model. The obtained mechanical characteristic of the periodontal tissues can be applied to clinical diagnosis

Mossbauer Effect Measurement of Intermetallic Compounds in Iron-Tin System : Fe_5Sn_3 and FeSn

Hyperfine fields for an Fe atom in intermetallic compounds, Fe_5Sn_3 and FeSn, have been investigated by using the Mossbauer effect. The hyperfine field of Fe_5Sn_3 with hexagonal B8_2-type structure is 187kOe on 2(a) sites while that on 2(d) sites has two values, 247kOe and 208kOe, at liquid-air temperature. The B8_2-type structure of Fe_5Sn_3 is stable above 760℃ and the magnetic Curie temperature is (280°±5°)C. FeSn of hexagonal B35-type is antiferromagnetic with the Neel temperature at 97℃ and the hyperfine field is 163kOe on an Fe site at liquid-air temperature. Temperature dependence of hyperfine field, isomer shift and quadrupole interaction was also studied

Measurement of Biomechanical Impedance - Its device and measuring conditions

Biomechanical impedance is relatively small compared to industrial mechanical impedance. Thus it is difficult to measure it precisely. A biomechanical impedance measuring system was developed for portable use by means of random excitation. This system doesn't require a fixed body and vibrator supporting apparatus. In order to obtain an impedance spectrum, the FFT processing is performed using a personal computer. The spectra of the biomechanical impedance which is measured on body surfaces depend on body positions and can be roughly classified into three spectra patterns : soft, stiff and intermediate. During the measurement, the measuring conditions (preload, diameter of the vibrating tip etc.) influence the results. However, it became clear that the linearity of the biomechanical impedance was satisfied in the limited measuring conditions. Accordingly it is possible to standardize the impedance and to compare it with the results under different measuring conditions

The Curie Temperature of Magnetically Inhomogeneous Amorphous Fe-Zr-B Alloys

The Curie temperature of amorphous Fe-Zr-B alloys was determined by both the Mossbauer thermal scan and a modified Arrott-plots methods. For amorphous Fe_(Zr_B_x)_8 alloys, the two methods make a difference between the values of T_c. On the other hand, for amorphous Fe_(Zr_B_x)_ alloys, the results of the two methods agree with each other within limits of the experimental error. It is found that the magnetic inhomogeneity often causes the difficulty in the determination of T_c and the measurement of T_c necessitating external fields is accompanied by a serious problem in the case of the magnetically inhomogeneous materials. Since no external field is necessary, the Mossbauer thermal scan method is very useful for determining T_c of amorphous alloys containing Fe atoms

Distribution of Hyperfine Fields in Magnetically Anisotropic Amorphous Fe_<100-x>B_x Alloys

The temperature dependence of the Mossbauer spectra of the amorphous Fe_B_x (x=14~21) alloys has been measured. The two distributions of intensity, I_ (H) and I_2(H), which are associated with (±3/2-±1/2) and (±1/2-^-_+1/2), and with (±1/2-±1/2) transitions, respectively, are calculated from the spectra separately. The fact that the shapes of I_2(H) are different from those of I_ (H) at 20K gives evidence that the magnitude and direction of hyperfine fields are not independent of each other, but are correlated. The ratio of the average fields H_2, derived from I_2(H), to H, derived from the hyperfine field distribution P(H), at 20K is dependent on the boron concentration. It is considered that there exists a spatial fluctuation of composition in the samples, and that in the regions where x=17 the magnetization changes its direction easily from parallel to perpendicular to the sample plane, under the stresses caused by decreasing temperature

Measurement of Microvibration on the Skin Surface

There is a small vibration which goes undetected by the naked eyes. It is called a microvibration (MV) or a minor tremor (MT). The MV on the body surface is expected to apply to a clinical examination of the autonomic nervous system. It is not cleared why and how the MV occurs, but there are many papers about its occurrence and clinical application. In this study, MV measuring system, its estimation and basic characteristics are examined. The difference between head MV and thenar MV, individual MV and diurnal and seasonal change are discussed. The power spectrum of MV is obtained using an autoregressive model