著者
酒向 貴子 川田 伸一郎 手塚 牧人 上杉 哲郎 明仁
出版者
国立科学博物館
雑誌
Bulletin of the National Museum of Nature and Science Series A Zoology (ISSN:18819052)
巻号頁・発行日
vol.34, no.2, pp.63-75, 2008-06

The distribution of latrines of the raccoon dog, Nyctereutes procyonoides, was examined from July 2006 to December 2007 in the Imperial Palace grounds, Tokyo, Japan. The raccoon dog is accustomed to defecate at fixed locations, forming holding latrines; thus the distribution of latrines is a good indicator of their abundance. The results suggest that the latrines are widely scattered in the study site, but are more dense in the Fukiage area, where an old-growth broad-leaved forest is established. The latrine sites are used more frequently from September to December, as the number of fresh feces increased in the autumnal season. To examine the seasonal food changes of the raccoon dogs, 10 pieces of feces from some latrines were collected every month and analyzed the indigestible contents in the sampled feces. The food items identified consisted of animal, plant and man-made materials, suggesting that the raccoon dogs were highly omnivorous. The animal materials found from the feces included mammals (4% of total feces), birds (37%), reptiles (2%), amphibians (3%), insects (95%), chilopods (56%), isopods (2%) and gastropods (12%). Invertebrates were the most abundand food item throughout the year. Three coleopteran families, the Carabidae, Staphylinidae and Scarabaeidae, accounted for a large proportion of the insects and they showed seasonal fluctuations. These suggest that the raccoon dogs fed on them as major animal food resources in the study site, and perhaps the seasonality is related to the temporal changes of availability of the insects. The majority of plant materials found in the feces was a variety of seeds, suggesting that the raccoon dogs fed on berries and fleshy fruits throughout the year. The occurrence of seeds decreased from March to April, which coincided with a low availability of fruits. The seeds found in feces were categorized into three types : (1) the short-term berry type including Prunus (Cerasus) spp., Moms spp., Rubus hirsutus and Machilus thunbergii, which occurred only a short term after their fruiting periods ; (2) the long-term berry type, including Celtis sinensis, Aphananthe aspera and Swida controversa, which occurred continuously for three or more months after the fruiting periods ; (3) the acorn type, including Castanopsis spp., Quercus spp. and Ginkgo biloba, which occurred in early spring (January to April) when the other fruits are scarce. The seasonal change of the three fruit types implies that the raccoon dogs consume the available fruits in relation to the successive fruiting periods. The proportion of artificial materials found in the feces was considerably lower than in previous studies carried out in the suburbs of Tokyo, suggesting that the raccoon dogs in the study site strongly depend on natural foods. Most of the natural food items were native to Japan since the past Edo period. Thus we conclude that the preservation of biodiversity in the Imperial Palace grounds was essential for the re-colonization by the raccoon dogs of the Tokyo metropolitan area after the 1970s.
著者
高田 知紀 梅津 喜美夫 桑子 敏雄
出版者
公益社団法人 土木学会
雑誌
土木学会論文集F6(安全問題) (ISSN:21856621)
巻号頁・発行日
vol.68, no.2, pp.I_167-I_174, 2012 (Released:2013-01-30)
参考文献数
32
被引用文献数
1 5

東日本大震災では,多くの神社が津波被害を免れたことが指摘されている.本研究では,日本の神社に祀られる祭神の多様性は,人びとの関心に応じた差異化の結果であるという仮説から,宮城県沿岸部の神社についてその祭神と空間的配置に着目しながら被害調査を行った.祭神については特に,ヤマタノオロチ退治で知られるスサノオノミコトに着目した.スサノオは無病息災の神として祀られることから,洪水や津波といった自然災害時にも大きな役割を果たすと考えられる.また,地域の治水上の要所に鎮座していることが多い.東北での調査から,スサノオを祀った神社,またスサノオがルーツであると考えられる熊野神社は,そのほとんどが津波被害を免れていることを明らかにした.この結果は,地域の歴史や文化をふまえたリスク・マネジメントのあり方について重要な知見を提供する.
著者
岸本 広司
出版者
岐阜聖徳学園大学
雑誌
聖徳学園岐阜教育大学紀要 (ISSN:09160175)
巻号頁・発行日
vol.30, pp.223-247, 1995-09-30

Edmund Burke is generally recognized as the father of modern conservatism. For conservaties, he has been a continuing source of inspiration and a reservoir of ideas to counter the steady growth of radicalism and revolution since his day. As a conservative, what Burke had to conserve before everything else was the British Constitution. It seemed to him the best of constitutions. He did not regard the British Constitution as perfect, but he looked upon it as perfect for Englishmen. The purpose of this study is to clear the conservative political thought of Edmund Burke by considering his "Speech to the Electors of Bristol" and his plan for Economical Reform.
著者
赤池 弘次
出版者
一般社団法人 日本物理学会
雑誌
日本物理学会誌 (ISSN:00290181)
巻号頁・発行日
vol.35, no.7, pp.608-614, 1980-07-05 (Released:2008-04-14)
参考文献数
3
被引用文献数
1

L. Boltzmannによって導入されたエントロピーを統計的分布の確率の対数とする解釈は, 統計と確率との本質的な関係を明らかにする歴史的な貢献である. 数理統計学の発展は, このBoltzmannの業績に対する認識を欠いたままにすすめられたが, 最も著しい成果とみなされるものは常にこの確率論的エントロピーの概念に密接した研究によって得られている. 予測の視点と確率論的エントロピー概念との結合によって, 統計的方法の展開に有効な統一的視点が得られるとするのが筆者の主張である. これによって尤度概念の役割とその重要性に客観的な説明が与えられ, 従来問題視されたベイズ(Bayes)理論の実際的利用への道が開かれる.
著者
Ryugo S. HAYANO Masaharu TSUBOKURA Makoto MIYAZAKI Hideo SATOU Katsumi SATO Shin MASAKI Yu SAKUMA
出版者
The Japan Academy
雑誌
Proceedings of the Japan Academy, Series B (ISSN:03862208)
巻号頁・発行日
vol.89, no.4, pp.157-163, 2013-04-11 (Released:2013-04-11)
参考文献数
14
被引用文献数
70 86

The Fukushima Dai-ichi NPP accident contaminated the soil of densely-populated regions in Fukushima Prefecture with radioactive cesium, which poses significant risks of internal and external exposure to the residents. If we apply the knowledge of post-Chernobyl accident studies, internal exposures in excess of a few mSv/y would be expected to be frequent in Fukushima.Extensive whole-body-counter surveys (n = 32,811) carried out at the Hirata Central Hospital between October, 2011 and November, 2012, however show that the internal exposure levels of residents are much lower than estimated. In particular, the first sampling-bias-free assessment of the internal exposure of children in the town of Miharu, Fukushima, shows that the 137Cs body burdens of all children (n = 1,383, ages 6–15, covering 95% of children enrolled in town-operated schools) were below the detection limit of 300 Bq/body in the fall of 2012. These results are not conclusive for the prefecture as a whole, but are consistent with results obtained from other municipalities in the prefecture, and with prefectural data.(Communicated by Toshimitsu YAMAZAKI, M.J.A.)
著者
縄田 健悟
出版者
公益社団法人 日本心理学会
雑誌
心理学研究 (ISSN:00215236)
巻号頁・発行日
pp.85.13016, (Released:2014-06-01)
参考文献数
24
被引用文献数
5 2

Despite the widespread popular belief in Japan about a relationship between personality and ABO blood type, this association has not been empirically substantiated. This study provides more robust evidence that there is no relationship between blood type and personality, through a secondary analysis of large-scale survey data. Recent data (after 2000) were collected using large-scale random sampling from over 10,000 people in total from both Japan and the US. Effect sizes were calculated. Japanese datasets from 2004 (N = 2,878–2,938), and 2,005 (N = 3,618–3,692) as well as one dataset from the US in 2004 (N = 3,037–3,092) were used. In all the datasets, 65 of 68 items yielded non-significant differences between blood groups. Effect sizes (η2) were less than .003. This means that blood type explained less than 0.3% of the total variance in personality. These results show the non-relevance of blood type for personality.