著者

浜岡 秀勝 石塚 沙矢香 阿久津 雅紀 清水 浩志郎

出版者

秋田大学

雑誌

秋田大学工学資源学部研究報告 (ISSN:13457241)

巻号頁・発行日

vol.24, pp.37-43, 2003-10-31

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Aomori, Akita and Morioka City are the capital cities of each prefecture and have almost same population. However, the liveliness in the urban central district is not same among these cities because of the difference of the townscape. In this study, each townscape is divided into several elements to understand the relationship between the liveliness and townscape. It is found that two elements, such as "buildings" and "crowd", influence toward the liveliness from the result of comparison analysis. Analytic Hierarchy Process is selected to clarify the contribution of these elements toward the liveliness in each city. From the result of this analysis, it is shown that the share of "buildings" and "road structure" holds the majority in the liveliness.

著者

高橋 圭太 井上 浩 TAKAHASHI Keita INOUE Hiroshi

出版者

秋田大学工学資源学部

雑誌

秋田大学工学資源学部研究報告 (ISSN:13457241)

巻号頁・発行日

no.30, pp.1-7, 2009-10-01

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Recent advances of office automation and information technology cause the increase of the complaint of ocular fatigue, musculoskeletal fatigue and mental fatigue for VDT (visual display terminal) workers. It becomes obvious as problem on industrial safety and health. A quantitative analysis on the stress and fatigue by scientific data is very useful. In this paper, the results of quantitative analysis focused on total working hours with quantitative indexes of HRV (heart rate variability) used on evaluation in autonomic function are discussed. VDT workers group with longer total working hours has different HRV and CVrri (Coefficient of variation of R-R interval) than one of control group. The extent of stress and fatigue may differ with total working hours.

著者

小松 芳成 後藤 正治 麻生 節夫

出版者

秋田大学

雑誌

秋田大学工学資源学部研究報告 (ISSN:13457241)

巻号頁・発行日

vol.24, pp.19-25, 2003-10-31

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Small-sized "Tatara-buki" furnace and "Oroshigane" furnace were made for laboratory working. Iron sand mined from Mukaihama beach in the city of Akita was applied to "Tamahagane" making based on combined use of the Tatara-buki process and the Oroshigane process. After washing in water and magnetic dressing, the iron sand was smelted by means of the "Tatara-buki" process and Kera (iron bear) with lower phosphorous and surfur contents was made in reproducibility of 20 % yield. The carbon content of the Kera was 2.43〜3.04 mass% which was significantly lower than that in blast furnace process. Next, the Kera was refined by the Oroshigane process to make Tamahagane which was a high quality iron containing 0.63mass%C, 0.04mass%Si, 0.048mass%S and 0.075mass%P. The microstructure of the Kera and the Tamahagane was well understood from the carbon contents. A series of the experiments mentioned above was conducted as an appropriate practice on an education program "Creative Techno-Craft" for the undergraduate course in the Department of Materials Science and Engineering, Akita University.