著者
山中 亮一 上月 康則 野上 文子 魚谷 昂一郎 三好 真千 五島 幸太郎
出版者
公益社団法人 土木学会
雑誌
土木学会論文集B2(海岸工学) (ISSN:18842399)
巻号頁・発行日
vol.68, no.2, pp.I_1206-I_1210, 2012 (Released:2012-11-15)
参考文献数
12

Mytilus galloprovincialis (mussel) is a dominant species that attach to seawalls in eutrophied enclosed ports in Japan. Mussel drop-off occurrs every summertime causing sediment contamination at the sea bottom. To avoid the occurrence of mussel drop-off, we suggest to harvest an attached mussel just before the drop-off and composting it. To predict the occurrence of the mussel drop-off, we have to investigate it's biological reaction to influential factors, especially water quality variation. Therefore, we conduct the field observation and reaction experiment of mussels. As a result, we clarified that adhesion characteristics of mussels are affected by the pattern of water quality variation and caused by internal seiche which improves the number of byssus of the mussels.
著者
三好 真千 上月 康則 山中 亮一 山口 暢洋 坂下 広大 田中 千裕 山口 奈津美
出版者
Japan Society of Civil Engineers
雑誌
土木学会論文集B2(海岸工学) (ISSN:18842399)
巻号頁・発行日
vol.65, no.1, pp.1246-1250, 2009 (Released:2010-03-05)
参考文献数
7
被引用文献数
1 1

Large volume of mussels attaches on the coastal structure in eutrophic area. The dropped and died mussels accelerate the depression of dissolved oxygen in the bottom layer. This study revealed the relationship between fluctuation of salinity and temperature and their attaching activity on the wall. Result of our investigation at Amagasaki Harbor in Osaka Bay showed that the mass of mussels dropped out at the bottom after the salinity and temperature had extensively changed. It was also observed in Komatsushima Harbor that the salinity and temperature jumps initiated the dropout of the mussel. From laboratory experiments in different environmental conditions; salinity and temperature, we cleared the ecological cycle of the mussels in which the changes in salinity and temperature mainly influenced their activities.
著者
山中 亮一 上月 康則 田邊 晋 井若 和久 村上 仁士
出版者
Japan Society of Civil Engineers
雑誌
土木学会論文集B2(海岸工学) (ISSN:18842399)
巻号頁・発行日
vol.65, no.1, pp.341-345, 2009 (Released:2010-03-05)
参考文献数
18

Tsunami disaster prevention of Seto Inland Sea is slow to take action for lack of knowledge of generation mechanism of Tsunami damages. According to previous research papers, there is a possibility of appearance of sudden water level raising and long-term water level fluctuation in sympathetic vibration with characteristic vibration in some bay. Therefore, this study focuses on period characteristics and hazardous sea area. As a result of numerical analysis, temporal period characteristics of each sea area, distribution of largest tsunami heights and time of occurrence, distribution of maximum tsunami velocity and time of occurrence and a map of hazardous sea area are clarified. Moreover, generation mechanisms of Tsunami damages are examined.
著者
井若 和久 上月 康則 山中 亮一 田邊 晋 村上 仁士
出版者
Japan Society of Civil Engineers
雑誌
土木学会論文集B2(海岸工学) (ISSN:18842399)
巻号頁・発行日
vol.67, no.2, pp.I_1261-I_1265, 2011 (Released:2011-11-09)
参考文献数
16

We examined values and applications of earthquake and tsunami stone monuments in Tokushima. The results of the study are as follows; (1) the purposes of stone utilization were to hand down records and lessons of earthquake and tsunami to posterity for its "presence", "conspicuousness" and "durability". (2) We recognized three cultural values of earthquake and tsunami stone monuments in Tokushima such as academic material, disaster prevention education material and disaster cultural asset. (3) We found that about 70% of earthquake and tsunami stone monuments in Tokushima have problems of their location and decipherment, and "teaching" function decreased remarkably. On the other hand, some stone monuments signs of their locations and/or explanations in modern Japanese were newly set up. (4) We collected the application cases of the earthquake and tsunami stone monuments in local municipals, areas and primary and junior high schools.
著者
山中 亮 松林 武生 佐伯 徹郎 榎本 靖士 山崎 一彦 杉田 正明
出版者
一般社団法人日本体力医学会
雑誌
体力科学 (ISSN:0039906X)
巻号頁・発行日
vol.65, no.3, pp.307-313, 2016-06-01 (Released:2016-05-14)
参考文献数
24
被引用文献数
1 1

The purpose of this study was to examine the relationships between running performance and the cross–sectional area of the psoas major, peak oxygen uptake, and running economy in male junior long–distance runners. The subjects were 37 male junior athletes who achieved good records in interscholastic athletic competition during 5 years (2011–2015). Their seasonal best times in a 5,000 m race (5,000m–SB) were 14:04.11 ± 0:07.25 (13:53.64–14:16.15). In a multiple regression analysis, 5,000m–SB was statistical significantly correlated with the cross–sectional area of psoas major (16.0 ± 1.7 cm2) measured on magnetic resonance imaging and peak oxygen uptake (4.25 ± 0.36 l min-1 [76.9 ± 5.8 ml min-1 kg-1]) during a lactate curve test comprising five stages. However, 5,000m–SB was not related to oxygen uptake at the work–load which was less than the load at the lactate threshold estimated by using the lactate curve test results. These results suggest that a high volume of the psoas major, the largest hip–flexor muscle, and peak oxygen uptake are among the important factors for junior long–distance runner performance.
著者
山中 亮 神谷 大介 比嘉 健人 和田 賢哉 具志堅 清一 澤部 純浩
出版者
一般社団法人 交通工学研究会
雑誌
交通工学論文集
巻号頁・発行日
vol.6, no.4, pp.A_79-A_84, 2020

<p><tt>近年、訪日外国人の増加とともに、急増する訪日外国人レンタカー利用による事故を防止するため、警察庁、国土交通省、民間事業者などにより、各種取り組みが推進されている。しかしながら、早急な安全対策が必要とされているものの、原因が特定できていないため、具体的な対策に結びついていない。 本研究では、沖縄本島を対象として </tt>ETC2.0 <tt>プローブデータを用いて、居住者、日本人レンタカー利用者及び訪日外国人レンタカー利用者(居住地別:台湾、韓国、香港)の急制動発生箇所比較を行った。</tt> <tt>結果、既存の事故危険箇所の特定方法では、見落とされる可能性が高い訪日外国人ドライバーにとって危険な区間を特定した。この区間の道路交通環境を比較し、訪日外国人ドライバーによる急制動と道路交通環境の関係を明らかにした。</tt></p>
著者
山中 亮 神谷 大介 内藤 郁 内海 泰輔 多田 俊也 新垣 康明
出版者
公益社団法人 土木学会
雑誌
土木学会論文集D3(土木計画学)
巻号頁・発行日
vol.75, no.5, pp.I_651-I_657, 2019

近年,訪日外国人の増加とともに,訪日外国人のレンタカー事故が急増している.しかしながら,具体的な対策はほとんど行われておらず,早急な安全対策が必要とされているが,危険個所自体が明確ではない.本稿では,沖縄本島を対象として,道路区間別交通事故件数と,ETC2.0プローブデータを用いて危険個所の比較を行った.県民ドライバーの急制動箇所は一般プローブとし,日本人及び訪日外国人レンタカ ードライバーの急制動箇所は特定プローブを用いることで比較を行った.結果,訪日外国人ドライバーが運転している中で危険な区間が,事故件数が多い区間とは異なる区間にも存在することが明らかになった.特に,事故件数が相対的に少ないが急制動が多い区間では,訪日外国人ドライバー対策を優先的に行うことが効率的であると考えられる.
著者
山中 亮
出版者
北海学園大学
雑誌
北海学園大学学園論集 (ISSN:03857271)
巻号頁・発行日
vol.139, pp.97-105, 2009-03-25
著者
上月 康則 山中 亮一 松重 摩耶 齋藤 梓 石田 達憲 大谷 壮介
出版者
公益社団法人 土木学会
雑誌
土木学会論文集B2(海岸工学) (ISSN:18842399)
巻号頁・発行日
vol.68, no.2, pp.I_971-I_975, 2012 (Released:2012-11-15)
参考文献数
15

Various laboratory experiments were performed to examine the effects of H2S (Hydrogen Sulfide) on R. philippinarum in this study. These results were as follows. 1) Most of clam closed its shell, in case was placed in the anoxic water. However, the number of clam that opened its shell increased with time. 20 hours later, the dying clam appeared after the clam extended the siphon and pelecypod. 2) H2S exposure had an insignificant effect on the clam, they closed shells. However, the clam was significantly affected by H2S exposure when they opened its shell and extended siphon and pelecypod. 3) When the water was hypoxic or anoxic before Blue tide occurrence (Aoshio), the clam would directly suffer severe effects of H2S because the extended soft tissue from the inside of shell was exposed.