著者

廣田 昭久 横田 賀英子 和田 純一郎 渡辺 昭一 高澤 則美

出版者

日本法科学技術学会

雑誌

日本鑑識科学技術学会誌 (ISSN:13428713)

巻号頁・発行日

vol.5, no.1, pp.33-53, 2000 (Released:2009-11-27)

参考文献数

81

被引用文献数

9 7

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In the present study we investigated heart rate and heart rate variability (HRV) in the guilty knowledge test (GKT). Participants were instructed to “steal” envelopes and hide them. Participants were then presented with questions focusing on certain aspects of the particular envelopes they had stolen. They were requested to respond with “no” to every question, thus denying their knowledge about the critical items. Heart rate, SCR, and HRV components of high-frequency (HF) and low-frequency (LF) were measured during the GKT examinations. Results showed that heart rate decreased in the critical items. They also showed that decrement of heart rate was most distinctive about 10-15 seconds after the onset of the questioning of the critical items. The results indicated that there is a characteristic response pattern between heart rate and HRV concerning the critical items. That is, heart rate decrement is accompanied by increment of HF component and decrement of LF component. Also, in order to examine which method would serve as the most effective measure for psychophysiological detection of deception, we compared among three different analytical methods: fast Fourier transform (FFT) analysis, peak-to-valley method, and complex demodulation (CDM) method, in assessing HRV, respectively. Results showed that the CDM method traced both HF and LF amplitudes were most effectively, and therefore would be the best indices for detection. Some hypotheses were discussed concerning psychophysiological responses in detection of deception, one of which was the implication that subjects might have adopted passive coping, in other words, hemodynamic reaction pattern-II, when presented with the critical items, because of the particular cardiovascular response pattern shown in the psychophysiological detection of deception.

著者

曽田 五月也 和田 純一 平田 裕一 山中 久幸

出版者

日本建築学会

雑誌

日本建築学会構造系論文集 (ISSN:13404202)

巻号頁・発行日

vol.59, no.457, pp.29-36, 1994

被引用文献数

10 6

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The damper investigated is an assemblage of a couple of units composed of two parallel steel plates and a layer of epoxy visco-elastic material (VEM) between them. When subjected to shear deformation, the VEM exhibits a hysteretic property or an energy absorbing capacity. The purpose of this paper is to present a method to construct a mechanical model to exactly simulate the dynamic behaviors of this damper, paving the way to putting it to practical use in the passive vibration-control design of buildings. A series of cyclic loading tests on the damper reveals that an equivalent stiffness and an equivalent damping coefficient, representing the hysteretic properties of the damper, are mainly dependent on the loading frequency and the current temperature. A linear three-element dashpot-spring model proposed has been confirmed capable of simulating these properties exactly .