著者

乾 睦子 西本 昌司

出版者

国士舘大学理工学部

雑誌

国士舘大学理工学部紀要 = TRANSACTIONS OF THE KOKUSHIKAN UNIVERSITY SCHOOL OF SCIENCE AND ENGINEERING (ISSN:18824013)

巻号頁・発行日

vol.13, pp.117-124, 2020-03-31

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It is not so widely known that various kinds of marble had been quarried in Japan as building stone. Marble quarries were active in Japan until about the end of 1960's. Those marbles have been used for the interior finishing of many historic buildings in Tokyo. This is the investigation report on the domestic building stones used for the interiors (mantlepieces) in some of the historic western style houses in Tokyo, designed by Josiah Conder. The houses are: the Former Iwasaki Residence, the Former Shimazu Residence, and the Former Furukawa Residence. Completion of the houses was between 1896 to 1917. Provenance of the marble of the mantlepieces was identified non-destructively. Marbles from Ibaraki Prefecture, Gifu Prefecture, Iwate Prefecture, Yamaguchi Prefecture, and Tokyo Metropolis were identified. The result showed that quarrying of those marbles was active during those years. The investigation is significant for understanding the history of the use and logistics of building stones in Japan, which leads to righteous assessment of the cultural heritage.

著者

橋本 隆雄 内田 秀明 宗川 清

出版者

国士舘大学理工学部

雑誌

国士舘大学理工学部紀要 = TRANSACTIONS OF THE KOKUSHIKAN UNIVERSITY SCHOOL OF SCIENCE AND ENGINEERING (ISSN:18824013)

巻号頁・発行日

vol.14, pp.87-98, 2021-03-31

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In the 2018 Hokkaido Eastern Iburi Earthquake, a slope with a strength of 7 collapsed in Atsuma Town. On the other hand, in Sapporo City, where the epicenter distance exceeds 50 km, earthquakes with a seismic intensity of 5 or higher were observed. In the Omagari district of Kitahiroshima City, a seismic intensity of less than 5 was observed, and 28 residential land facing the Omagari River collapsed. In Kitahiroshima City, typhoon No. 21 caused heavy rain before the earthquake. Therefore, in this paper, we analyzed the slope of the building in the Omagari area of Kitahiroshima City and the damage to the retaining wall. As a result, it was found that the main causes of the slope of the building and the damage of the retaining wall were the rise of the groundwater level of the loose embankment of the valley in addition to the earthquake.

著者

和田 匡史 兵頭 洋樹 地神 裕史 土居 裕和 山本 憲志

出版者

国士舘大学理工学部

雑誌

国士舘大学理工学部紀要 = TRANSACTIONS OF THE KOKUSHIKAN UNIVERSITY SCHOOL OF SCIENCE AND ENGINEERING (ISSN:18824013)

巻号頁・発行日

vol.14, pp.159-164, 2021-03-31

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Bathing and sleep play important roles in physical recovery of athletes. Hot spring water containing high concentration carbon dioxide (CO_2 ≥ 1000 ppm) has long been applied to the patients suffering from cardiovascular diseases in balneotherapy. Clinical observations reported various effects of CO_2-hot spring immersion on human body, such as flushing of the skin, skin blood flow improvements, decrease of blood catecholamine levels,and heart rate reduction. The heart rate reduction by CO_2-water immersion might be induced by neuronal information generated in the skin [N. Yamamoto et al, 2007]. The purpose of this study is to examine whether artificial CO_2 hot water immersion facilitates physical recovery in competitive swimmers. Fourteen healthy college competitive swimmers participated in this study. The participants performed anaerobic exercise. Immediately after the exercise, they immersed their whole bodies into tap-water or artificial CO_2-water at 38 degrees Celsius for 10 minutes. To measure the sleep-wake cycle, accelerometers (FS-760 and 770, ACOS, Japan) was used. The sleep-wake data were analyzed by circadian rhythm analysis software (SleepSign Act2, KISSEI COMTEC, Japan). Sleep variables analyzed included time in bed, sleep period time, total sleep time, sleep efficiency, and sleep latency. Blood lactate concentration (BLa) was measured by Lactate analyzer (Lactate Pro2LT-1730, Arkray, Japan). BLa in recovery period was significantly lower in CO_2-water immersion than in tap-water immersion (20 min after the exercise 2.4 ± 0.8 vs 2.7 ± 0.5 mmol, p<0.05, 25 min after the exercise 1.9 ± 0.6 vs 2.6 ± 0.8 mmol, p<0.05, 30min after the exercise 1.8 ± 0.4 vs 2.4 ± 0. mmol, p<0.05,). Sleep latency was significantly shorter in CO_2-water immersion than in tap-water immersion (7.8 ± 2.3 min vs 16.5 ± 3.8 min, p <0.05). Sleep efficiency was significantly higher in CO_2-water immersion than in tap-water immersion (90.3 ± 3.5% vs 83.2 ± 4.6%, p<0.05). Therefore, these results raise the possibilitythat hyperthemia, i.e. body core temperature raise, induced by CO_2-water immersion leads to deep sleep. Deep sleep after the CO_2-water immersion seems to be extremely useful in the physical recovery from fatigue. The rapid decrease in BLa in the CO_2-water immersion suggests efficient physical recovery after anaerobic exercise. Therefore, it was suggested that CO_2-water immersion is effective for physical recovery.

著者

岸本 健 浜野 雅夫 石田 隆

出版者

国士舘大学理工学部

雑誌

国士舘大学理工学部紀要 = TRANSACTIONS OF THE KOKUSHIKAN UNIVERSITY SCHOOL OF SCIENCE AND ENGINEERING (ISSN:18824013)

巻号頁・発行日

vol.11, pp.3-10, 2017-11-30

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This paper reports about the cooling of paraffin in horizontal cylindrical container. In this cooling process, the temperature change of paraffin in liquid and solid had made an interesting behaviors. We have analyzed this phenomenon using super-cooling and freezing point depression and explained reasonably and simulated successfully.

著者

橋本 隆雄 内田 秀明 宗川 清

出版者

国士舘大学理工学部

雑誌

国士舘大学理工学部紀要 = TRANSACTIONS OF THE KOKUSHIKAN UNIVERSITY SCHOOL OF SCIENCE AND ENGINEERING (ISSN:18824013)

巻号頁・発行日

vol.13, pp.77-94, 2020-03-31

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The residential land in the Omagari area of Kitahiroshima City collapsed 28 houses along the river by the 2018 Hokkaido Iburi Eastern Earthquake. In addition, the stricken area suffered heavy rain by Typhoon 21 the day before the earthquake. The cause of the damage is thought to be an increase in groundwater level in the valley-filled embankment in addition to the earthquake. Therefore, in this paper, the cause of residential land damage was estimated by slip stability analysis, and the effect of groundwater reduction method was clarified.

著者

中島 基樹 小倉 昭弘 関口 宗男 和田 浩明

出版者

国士舘大学理工学部

雑誌

国士舘大学理工学部紀要 = TRANSACTIONS OF THE KOKUSHIKAN UNIVERSITY SCHOOL OF SCIENCE AND ENGINEERING (ISSN:18824013)

巻号頁・発行日

vol.11, pp.77-80, 2017-11-30

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This article reports an attempt of a new experimental program of the quantum physics for a basic course in university. Our program does not require advanced knowledges and experimental skills for the students. We investigate a simple way for measurements of correct value of Plank's constant. We also hope our experimental program will be used in the advanced physics course in high school.