著者
奥野 智也 佐々木 勇和 鈴木 雄太
雑誌
情報処理学会論文誌データベース(TOD) (ISSN:18827799)
巻号頁・発行日
vol.13, no.3, pp.22-31, 2020-07-16

所望の物理化学的な性質を持つ新たな物質の探索は化学,創薬,物質・材料科学などの分野において重要な課題である.従来のアプローチは研究者の勘や経験に大きく依存し,また時間的なコストが高いという問題がある.そのため,探索の効率化を目的として,機械学習やデータマイニングなどの情報科学の技術を取り入れた研究がさかんに行われている.近年では深層学習技術を用いた高精度化が進んでいる.そこで,本稿では新物質探索における深層学習技術を網羅的に調査し体系的にまとめることを目的とする.新物質の探索技術を(1)物質構造からその性質を識別する分類と回帰技術,および(2)性質から物質を導出する生成技術に大別し,それぞれの技術の適用分野,データの分類,および深層学習のモデルについて述べる.さらに,既存技術の制約や問題点を述べ,今後の課題を明確にする.
著者
Asuka NAKAJIMA Takuya WATANABE Eitaro SHIOJI Mitsuaki AKIYAMA Maverick WOO
出版者
The Institute of Electronics, Information and Communication Engineers
雑誌
IEICE Transactions on Information and Systems (ISSN:09168532)
巻号頁・発行日
vol.E103.D, no.7, pp.1524-1540, 2020-07-01 (Released:2020-07-01)
参考文献数
40

With our ever increasing dependence on computers, many governments around the world have started to investigate strengthening the regulations on vulnerabilities and their lifecycle management. Although many previous works have studied this problem space for mainstream software packages and web applications, relatively few have studied this for consumer IoT devices. As our first step towards filling this void, this paper presents a pilot study on the vulnerability disclosures and patch releases of three prominent consumer IoT vendors in Japan and three in the United States. Our goals include (i) characterizing the trends and risks in the vulnerability lifecycle management of consumer IoT devices using accurate long-term data, and (ii) identifying problems, challenges, and potential approaches for future studies of this problem space. To this end, we collected all published vulnerabilities and patches related to the consumer IoT products by the included vendors between 2006 and 2017; then, we analyzed our dataset from multiple perspectives, such as the severity of the included vulnerabilities and the timing of the included patch releases with respect to the corresponding disclosures and exploits. Our work has uncovered several important findings that may inform future studies. These findings include (i) a stark contrast between how the vulnerabilities in our dataset were disclosed in the two markets, (ii) three alarming practices by the included vendors that may significantly increase the risk of 1-day exploits for customers, and (iii) challenges in data collection including crawling automation and long-term data availability. For each finding, we also provide discussions on its consequences and/or potential migrations or suggestions.
著者
Viliame Waqalevu 松井 英明 本田 晃伸 Serge Dossou 山本 淳 塩崎 一弘 小谷 知也
出版者
Japanese Society for Aquaculture Science
雑誌
水産増殖 (ISSN:03714217)
巻号頁・発行日
vol.67, no.2, pp.139-155, 2019-06-20 (Released:2020-06-20)
参考文献数
71

Brachionus plicatilis 複合種 SS および L 型に及ぼす3 種の栄養強化剤(DHA 強化クロレラ,冷凍ナンノクロロプシスおよび乳化筋子油)の餌料効果を比べた(対照区:濃縮淡水クロレラ)。両型ワムシの増殖速度と脂肪酸含量は試験区間で変化した。 非極性脂質と極性脂質の含量はワムシ型間で変化した。可溶性タンパク質は両型で DHA 強化クロレラおよび生クロレラ給餌で多かった。冷凍ナンノクロロプシスを除いた全ての試験区で,SS 型の可溶性タンパク質含量は L 型よりも高かった。 ワムシ型に応じて,培養方法,強化剤の投与量および脂肪酸要求量を考慮する必要がある。

287 134 39 16 OA 植民地統治論

著者
泉哲 著
出版者
有斐閣
巻号頁・発行日
1924
著者
明仁親王 目黒 勝介
出版者
The Ichthyological Society of Japan
雑誌
魚類学雑誌 (ISSN:00215090)
巻号頁・発行日
vol.22, no.3, pp.127-142, 1975-12-29 (Released:2010-06-28)
参考文献数
28

フタゴハゼGlossogobius giuris (Hamilton) と見なされていたウロハゼ属の1型は新種と認められたのでG.aureus (新称: コンジキハゼ) として記載した.本種の最も重要な特徴は孔器の配列にある.ウロハゼ属の他の種と比較し, その特徴を明らかにした.
著者
河上 麻由子
出版者
奈良女子大学
雑誌
基盤研究(C)
巻号頁・発行日
2016-04-01

倭国が「天下」の語を銘文に用いた五世紀ころ、中国では皇帝の支配領域以外を指して「天下」を用いることに柔軟で、中国的な天下観を前提にせずとも、ある領域を指して「天下」と表現することがあった。倭国の鉄剣・太刀銘文に自らの支配領域を「天下」と表現したことを理由に、倭国を中心とした天下観の誕生を論じるのは難しい。加えて、銘文のように単純な漢文すら作成できない支配者層の人びとが、中華思想のように複雑で高度な思想を十分に理解・咀嚼し、それを自らの支配に当てはめて独自の天下観を醸成するということは不可能であろう。さらに、そのほかアジアの事例を踏まえれば、倭国には独自の「アメ(天)」を祭る信仰があり、その下にある領域=大八洲(オオヤシマグニ)は倭王に統治されるという認識をベースとして、倭王武の実効支配領域を「天下」と表現したと判断するのが穏当である。倭国的な天下観の芽生えに疑問を呈するからには、倭王武よりのちには倭国が朝貢しなくなった理由にも、再検討を加えねばならない。西嶋定生氏以来、先行研究では、独自の天下観を発展させた倭国は、朝貢をやめ、冊封を受けないことで中国の天下から離脱したとされてきたからである。しかし広義の天下とは、皇帝の実効支配領域に、その威徳が及ぶ夷狄の範囲を加えたものである。皇帝の威徳が及んでいると中国側が判断しさえすれば、冊封の有無にかかわらず、その国は中国の天下に編入された。倭国が冊封を受けようと受けまいと、皇帝が自身の威徳が倭国にも及んでいると考える限り、倭国は中国の天下に組み込まれる。倭国の朝貢停止と冊封の問題は、切り離して議論されねばならない。倭国が朝貢を停止した理由は、雄略天皇より以降に、直系継承を担うべき人物が不在となり、王権が大きく同様する中で、対中国交渉を維持する余力が失われたためと考えるべきである。
著者
Yudai Tamada Kenji Takeuchi Chikae Yamaguchi Masashige Saito Tetsuya Ohira Kokoro Shirai Katsunori Kondo
出版者
Japan Epidemiological Association
雑誌
Journal of Epidemiology (ISSN:09175040)
巻号頁・発行日
pp.JE20200051, (Released:2020-05-16)
参考文献数
34

Background: While laughter is broadly recognized as a good medicine, a potential preventive effect of laughter on disability and death is still being debated. Accordingly, we investigated the association between the frequency of laughter and onset of functional disability and all-cause mortality among the older adults in Japan.Methods: The data for a 3-year follow-up cohort including 14,233 individuals (50.3% men) aged ≥ 65 years who could independently perform the activities of daily living and participated in the Japan Gerontological Evaluation Study were analyzed. The participants were classified into four categories according to their frequency of laughter (almost every day, 1–5 days/week, 1–3 days/month, and never or almost never). We estimated the risks of functional disability and all-cause mortality in each category using a Cox proportional hazards model.Results: During follow-up, 605 (4.3%) individuals developed functional disability, identified by new certification for the requirement of Long-Term Care Insurance, and 659 (4.6%) deaths were noted. After adjusting for the potential confounders, the multivariate-adjusted hazard ratio of functional disability increased with a decrease in the frequency of laughter (p for trend = 0.04). The risk of functional disability was 1.42 times higher for individuals who laughed never or almost never than for those who laughed almost every day. No such association was observed with the risk of all-cause mortality (p for trend = 0.39).Conclusions: Low frequency of laughter is associated with increased risks of functional disability. Laughter may be an early predictor of functional disability later on in life.

32 30 7 6 OA 道徳と主体

著者
川田 耕
出版者
社会学研究会
雑誌
ソシオロジ (ISSN:05841380)
巻号頁・発行日
vol.39, no.2, pp.97-113,189, 1994-10-31 (Released:2017-02-15)

Morality is generally something more than traditional practices. M.Foucault distinguishes the moralities between the "code-oriented" moralities, which have a system of traditonal practices and rules of behavior in detail, and the "ethics -oriented" moralities, in which such system and rulues are rather rudimentary and leave their function to each individual's retlective consciousness. In the latter case, each individual is required not only to have self-awareness but to make self-formation as "ethical subject". I think "the popular morality "in Japan which was named and investigated by Yasumaru Yoshio can be called ethics-oriennted morality, because this morality demands people should reform traditional practices and have reflective consciousness. The popular morality is ethical because of its great interest in each individual's consciousness and it is popular because of its premise that establishment of proper consciousness may bring some social profit. The popular morality depends on smooth circle of the moral doctrine, each individual's consciousness and the social profit. When this circle is not satisfactory, the existence of ethical subject is threatend,and the effects of morality tend to be code-oriented. I investigate such structure of this morality in early modern Japan (especially in the discourse of the "Rono" in the late Edo period and the "Hotokushugi" in the Meiji period), and search the transformation of it in the Meiji period and the possibility of creating new ethics.
著者
阿部(平石) さゆり
出版者
一般社団法人 日本アスレティックトレーニング学会
雑誌
日本アスレティックトレーニング学会誌 (ISSN:24326623)
巻号頁・発行日
vol.3, no.1, pp.3-11, 2017-12-15 (Released:2019-01-31)
参考文献数
72

Sport-related concussions (SRCs) are common, and the consequences of SRCs are multi-layered. In addition to its immediate effects, a SRC can lead to the development of long-lasting symptoms (i.e. postconcussion syndrome) and the increased risk of other musculoskeletal injuries. Repetitive head impacts may result in, in some cases, potentially irreversible and even fatal changes in the brain such as diffuse cerebral swelling and chronic traumatic encephalopathy. Due to its complexity, the prevention of SRCs must be considered at three different levels - primary, secondary and tertiary. For the primary prevention, the protective equipment such as helmets, headgears, and mouth guards does not reduce the risk of SRCs. While the effects of policy and rule changes to allow less physical contact are inconclusive, the education of proper tackling techniques and its implementation (i.e. practicing without helmets and pads) may be effective in preventing SRCs. Regarding the secondary and tertiary prevention, literature does not support the use of prolonged, strict rest. A brief period (24-48 hours) of physical and cognitive rest followed by a gradual increase of activities will likely facilitate a better recovery. The subthreshold exercise protocol has shown to be safe and reliable, and it seems to minimize the chronic symptoms related to SRCs. Although high-level evidence has yet to be established, early resumption of the monitored, controlled aerobic exercise may become the standard for future SRC recovery.