著者

Yasuko KAWAHATA Etsuo GENDA Hidehiko KOGUCH Koki UCHIYAMA Akira ISHII

出版者

Japan Society of Kansei Engineering

雑誌

International Journal of Affective Engineering (ISSN:21875413)

巻号頁・発行日

vol.13, no.1, pp.89-94, 2014 (Released:2014-01-31)

参考文献数

20

被引用文献数

4 10

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A mathematical model for the hit phenomenon in entertainment within a society is presented as a stochastic process of interactions of human dynamics. The model uses only the time distribution of advertisement budget as an input, and word-of-mouth (WOM) represented by posts on social network systems is used as data to compare with the calculated results. The unit of time is a day. The calculations for the Japanese motion picture market based on to the mathematical model agree very well with the actual residue distribution in time. The model is applied also to weekly TV drama. We show that prediction is possible in appearance to the number of news and TV and stage with regard reputation of stage actors in Japan in this paper.

著者

石井 晃 川畑 泰子 Akira Ishii Yasuko Kawahata

雑誌

人工知能 = journal of the Japanese Society for Artificial Intelligence (ISSN:21882266)

巻号頁・発行日

vol.30, no.1, pp.97-103, 2015-01-01

著者

Toshihiro MUNEMITSU Akira ISHII Eiji OKADA Hideo CHIHARA Kazumichi YOSHIDA Jun C TAKAHASHI Yasushi TAKAGI Susumu MIYAMOTO

出版者

The Japan Neurosurgical Society

雑誌

Neurologia medico-chirurgica (ISSN:04708105)

巻号頁・発行日

pp.oa.2018-0203, (Released:2019-02-28)

参考文献数

30

被引用文献数

4

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We previously reported that near-infrared hyperspectral imaging enabled the localization of atherosclerotic plaques from outside the vessels, but not the optical characteristics of each histological component. Therefore, the near-infrared spectrum of each component was collected from the sliced section of the human carotid plaque obtained with endarterectomy and the optical characteristics were confirmed in several wavelengths. Based on this information, we assessed the diagnostic accuracy for ex vivo chemogram in each plaque component created with near-infrared spectroscopy (NIRS), using multiple wavelengths. The chemogram projected on the actual image of plaque was created based on light intensity and transmittance change at three wavelengths. The wavelengths that were mainly were 1440, 1620, 1730, and 1930 nm. We evaluated the accuracy of histological diagnosis in chemogram compared with pathological findings, analyzing interobserver agreement with κ-statistics. The chemograms that we created depicted the components of fibrous tissue, smooth muscle, lipid tissue, intraplaque hemorrhage, and calcification. Diagnostic odds ratio in each component was as follows: 259.6 in fibrous tissue, 144 in smooth muscle, 1123.5 in lipid tissue, 29.3 in intraplaque hemorrhage, and 136.3 in calcification. The κ-statistics revealed that four components, excluding intraplaque hemorrhage, had substantial or almost perfect agreement. Thus, this study demonstrated the feasibility of using chemogram focused on specific component during the histological assessment of atherosclerotic plaques, highlighting its potential diagnostic ability. Chemograms of various target components can be created by combining multiple wavelengths. This technology may prove to be useful in improving the histological assessment of plaque using NIRS.