著者
森 浩一 深谷 和貴
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集 (ISSN:21879761)
巻号頁・発行日
vol.84, no.863, pp.18-00136, 2018 (Released:2018-07-25)
参考文献数
20

Spherical Acoustic Black Hole (ABH), a kind of acoustic metamaterial, has been made in the new configuration to control three dimensional propagation of acoustic wave and its characteristics have been investigated by experiments and numerical simulations. ABH is new sound absorber composed of shell and absorptive core. Shell guides the incident acoustic wave into the core and ABH traps acoustic wave. Moreover, shell matches the characteristic impedance to the medium around ABH at the surface, which can enlarge absorption area without reflection. The experimental model of spherical ABH is constructed by stacking urchin-like shaped layers made with a 3-D printer on the assumption that the sonic crystal theory (Torrent and Sánchez-Dehesa, 2006, 2007) is valid in new structure. To evaluate reflection and transmission of ABH quantitatively, sound pressure around ABH was measured and angle averaged reflection coefficient and angle averaged insertion loss (Elliott et al., 2014) were calculated. Also, Glass Wool Sphere made of the same material as core of ABH and Rigid Sphere made of the same material as shell of ABH were measured in the same way and ABH was compared with them. The results of experiment and finite element method analysis show spherical acoustic black hole can decrease reflection due to impedance matching. Moreover, it can change the propagation direction of acoustic wave due to refractive index distribution and a large acoustic ratio region caused by the small refraction was observed.
著者
池田 黎太郎
出版者
日本西洋古典学会
雑誌
西洋古典学研究 (ISSN:04479114)
巻号頁・発行日
vol.17, pp.22-27, 1969

この小論はOresteiaをθρασο&b.sigmav;に基づくδικηの否定という観点から論じようと試みる.周知のようにδικηはこの作品の中心になる重要な思想であり,それを主に「正義・裁き・報復」の意味に分ける.δικηはこの劇の中で,「正義の名によって敵を裁く行為が実は報復にほかならない」というパターンを構成し,報復は報復を呼んで悲劇的な悪循環を生ずる.これがアトレウス家に伝わる呪いの実態であり,オレステースの母殺しはその呪いの頂点に立つ.女神アテーナーはオレステースの罪を裁き,「自らの手」による報復行為を否定すると共に,劇の背後にある市民の抗争をも警告している.この報復のδικηをθρασο&b.sigmav;, τολμαとして把えようとする私の試みは,アトレウス家の呪いと,当時のポリスの問題の特質を示し,この伝承を劇化した作者の意図を明らかにすることができると思う.
著者
草田 裕紀 水田 孝信 早川 聡 和泉 潔
出版者
一般社団法人 人工知能学会
雑誌
人工知能学会論文誌
巻号頁・発行日
vol.30, no.5, pp.675-682, 2015
被引用文献数
5

We analyzed the impact of position-based market maker, which tries to maintain its neutral position, to the competition among stock exchanges by an artificial market simulation approach. In the previous study, we built an artificial market model and investigated for the impact of non-position-based market maker's spread to the markets' shares of trading volumes. However it had the serious problem that the non-position-based market maker is too simple to manage its own position properly and so we could not judge weather the result of previous study is correct or not. Thus in this study, we made a position-based market maker and explored the competition, in terms of taking markets' shares of trading volumes, between two artificial financial markets that have exactly the same specifications except existing a market maker, the non-position-based market maker or the position-based market maker. As a result, we found that the position-based market maker can acquire the share of trading volumes from the competitor even though its spread is bigger than bid-offer-spread of the competitor. Moreover, we revealed that position-based market maker can get a profit even in the situation that its spread or tick sizes of the stock exchanges are small. In addition to that, position-based market maker made a profit in almost all experiments which we conducted in this research by changing its spread and tick sizes of markets. At last, we confirmed that position-based market maker can manage its position properly compared to non-position-based market maker. In conclusion, the position-based market maker can not only supply liquidity to stock exchanges and contribute to acquire the share from the competitor as well as the non-position-based market maker does, but also manage its own position properly and make a profit.
著者
高橋 治男
出版者
日本マイコトキシン学会
雑誌
マイコトキシン (ISSN:02851466)
巻号頁・発行日
vol.55, no.2, pp.133-138, 2005 (Released:2006-05-19)
参考文献数
49

1960年代に飼料用落花生粕に発見されたアフラトキシン (AF) はその発がん性や毒性の強さ, また, 汚染食品の広範さなどからマイコトキシン研究の中心となり, 食品などにおける汚染実態, 産生カビの分類・同定などについて, 夥しい報告が蓄積されてきた. この報告では, AF汚染, 中でも落花生とコーンを中心に, 汚染とその産生カビについて近年の研究成果を交え紹介する. また, 近縁化合物で同様に発がん性が知られるステリグマトシスチンについても概説する.
著者
明闕名撰
出版者
愼獨齋刊
巻号頁・発行日
vol.[3], 1513
雑誌
全国大会講演論文集
巻号頁・発行日
vol.44, pp.119-120, 1992-02-24

In order to monitor and control increasingly large and complex computer networks, today's network manager should be smart enough to handle diverse problems intelligently and efficiently. In a large networking environment, the network manager needs to analyse avast amount of data, to handle simultaneously a vanety of problems and to take logical decisions as quickly as possible. The task can be eased and automated if the Expert System technology is introduced to help a manager in routine network monitoring, diagonising common network faults, analysing performance of thenetwork etc. The introduction of Expert System thusseems to eliminate the increasing demand of a technically expert operator on-site. In this paper a network management system is proposed in which the human operator is assisted by an Expert System in management tasks. In section 2,the general architecture of the system isgiven, section 3deals with the Expert System, section 4presents a case study followed by the conclusion in section 5.
出版者
日経BP社
雑誌
日経情報ストラテジ- (ISSN:09175342)
巻号頁・発行日
vol.19, no.7, pp.42-47, 2010-08

2005年から年2回開催されているファッションイベント「東京ガールズコレクション(TGC)」。モデルがショーで着用した洋服を来場者がその場で携帯電話で購入できるといった仕掛けが話題を呼び、毎回延べ2万人の来場者を集める。人気に注目して協賛するのはアパレルメーカーに限らない。家電や自動車、食品など様々なメーカーが協賛し、会場でキャンペーンなどを行う。

1 0 0 0 OA 栄花物語

出版者
巻号頁・発行日
vol.[7], 1691
著者
杉浦, 国頭
出版者
巻号頁・発行日
vol.[10], 1738
著者
土屋 昌明
出版者
専修大学社会知性開発研究センター
雑誌
専修大学社会知性開発研究センター東アジア世界史研究センター年報
巻号頁・発行日
vol.4, pp.139-165, 2010-03-19

文部科学省私立大学学術研究高度化推進事業オープン・リサーチ・センター整備事業
著者
Midori Takada Taku Yasui Toru Oka Wataru Shioyama Tadashi Kuroda Yasutomo Nakai Kazuo Nishimura Mikio Mukai Masashi Fujita
出版者
International Heart Journal Association
雑誌
International Heart Journal (ISSN:13492365)
巻号頁・発行日
pp.17-461, (Released:2018-08-29)
参考文献数
29
被引用文献数
22

Angiogenesis inhibitors, such as sorafenib and axitinib, which target vascular endothelial growth factor (VEGF) signaling, are widely used for renal cell carcinoma, including metastasis. In this study, we report a case of cardiovascular adverse events of aortic dissection and cardiac dysfunction during treatment with sorafenib and axitinib for metastatic renal cell carcinoma. A 66-year-old man had been administered sorafenib for 2 years after nephrectomy due to renal cell carcinoma. To control the progression of metastatic lung tumor, axitinib was started after sorafenib for four years. During the treatment, angiotensin II type 1 receptor blockers and Ca antagonists were used to strictly control the axitinib-induced hypertension and proteinuria. Aortic dissection and cardiac dysfunction occurred coincidentally. Considering the critical role of VEGF signaling in the homeostasis of the cardiovascular system, we speculated that the long-term use of axitinib and sorafenib directly influenced the initiation of aortic dissection and cardiac dysfunction. Although the precise mechanisms underlying the aortic dissection and cardiac dysfunction induced by angiogenesis inhibition are still elusive, onco-cardiologists and oncologists should pay careful attention to cardiovascular toxicity and complications in patients with cancer, particularly patients undergoing long-term cancer treatment.
著者
Ruddick Michael
出版者
新潟国際情報大学
雑誌
新潟国際情報大学情報文化学部紀要 (ISSN:1343490X)
巻号頁・発行日
vol.13, pp.11-29, 2010-04-01

The textbook is one of the most prevalent educational tool used in the classroom. Because of the high exposure to textbooks that students experience,care should be taken with regards to any kind of bias or possible destructive elements that might be found. One such element is sexism.This paper is a gender study of a text book,used in a senior high school in Japan,which uncovers many aspects of sexism. The paper shows that women in the English Language textbook Reward Starter (Greenall,1997)are less visible than men as characters,and are portrayed in stereotypical roles with regards to occupations and the family. A suggestion is made for a student/class evaluation of the textbook using the methodology provided in this investigation."It should not be assumed that people are aware of the ideological dimensions of their own practice. Ideologies built into conventions may be more or less naturalized and automatized, and people may find it difficult to comprehend that their normal practices could have specific ideological investments"(Fairclough :2006,90).
著者
小西 典子 尾畑 浩魅 甲斐 明美 大塚 佳代子 西川 禎一 寺嶋 淳 工藤 由起子
出版者
公益社団法人 日本食品衛生学会
雑誌
食品衛生学雑誌 (ISSN:00156426)
巻号頁・発行日
vol.59, no.4, pp.161-166, 2018-08-25 (Released:2018-08-30)
参考文献数
29
被引用文献数
2

腸管毒素原性大腸菌(ETEC)は,発展途上国において一般的な病原体として知られており,汚染した野菜や水を介して食中毒を引き起こす.また,ETECは,先進国でも食中毒を引き起こすが,その原因食品はしばしば不明である.そこで,食中毒統計を基に日本で発生したETEC食中毒事例を分析した.その結果,野菜および井戸水が原因食品の50%および22.2%を占めた.これら主な原因食品は発展途上国の場合と同様であった.また,ETECの血清群も分析され,血清群O6,O25,O27,O148,O153,O159およびO169が主要7血清群であった.ETECの代表的な血清群O148による食中毒発生事例について,その食品での検査法を中心に詳細に検討した結果,二段階増菌法および耐熱性エンテロトキシン遺伝子を対象としたリアルタイムPCR法によって本菌が効率的にカットネギから検出された.本研究では,日本でのETEC食中毒の原因食品および主要O血清群が明らかになり,ETECの国内環境での生存が示唆された.また,食中毒事例での原因食品究明において効果的な検出法が示された.
著者
碓井 稔 田村 俊一
出版者
日経BP社
雑誌
日経ビジネス (ISSN:00290491)
巻号頁・発行日
no.1775, pp.70-73, 2015-01-19

問 製造業では「IoT(Internet of Things、モノのインターネット)」を使った、生産革新の動きが進んでいます。第4次産業革命とも呼ばれます。工場は今後、どのように進化していくのでしょうか。