著者
白井 嵩士 榊 剛史 鳥海 不二夫 篠田 孝祐 風間 一洋 野田 五十樹 沼尾 正行 栗原 聡 Shirai Takashi Sakaki Takeshi Toriumi Fujio Shinoda Kosuke Kazama Kazuhiro Noda Itsuki Numao Masayuki Kurihara Satoshi
雑誌
SIG-DOCMAS = SIG-DOCMAS
巻号頁・発行日
no.B102, 2012-03-11

Twitter is a famous social networking service and has received attention recently.Twitter user have increased rapidly, and many users exchange information. When 2011 Tohokuearthquake and tsunami happened, people were able to obtain information from social networkingservice. Though Twitter played the important role, one of the problem of Twitter, a false rumordiffusion, was pointed out. In this research, we focus on a false rumor diffusion. We propose ainformation diffusion model based on SIR model, and discuss how to prevent a false rumor diffusion.

159 0 0 0 OA 本邦刀剣考

著者
榊原長俊
巻号頁・発行日
1827
著者
小池 麻由 大津 史子 榊原 仁作 後藤 伸之
出版者
Japanese Society of Drug Informatics
雑誌
医薬品情報学 (ISSN:13451464)
巻号頁・発行日
vol.14, no.4, pp.134-143, 2013-02-28 (Released:2013-03-06)
参考文献数
20
被引用文献数
12

Objective: Recently, use of health foods and supplements, as well as the amount of information available about them, has been steadily increasing.  Therefore, a noticeable increase in adverse drug reactions caused by health foods and supplements has also been seen.  The purpose of this study was to clarify the current status and backgrounds of patients with health food- or supplement-related adverse health effects.Methods: We selected the cases of health food- or supplement-related adverse health effects from the Case Reports of Adverse Drug Reactions and Poisoning Information System (CARPIS) database, which contains over 57,000 case reports of adverse drug reactions.  We investigated the background, suspected products and adverse events in each case and conducted univariate logistic regression analysis to determine significance.Results: We obtained a total of 327 cases consisting of 103 causative products.  Women comprised 66% of study subjects and had a significant association with dietary supplements.  Patients with a history of liver disease had a significant association with liver damage caused by “Ukon,” a drink made from turmeric root and sold as an anti-hangover remedy in Japan.Conclusion: The causative products had several unique features.  This information should be utilized to prevent health food- and supplement-related adverse health effects in the future.
著者
鳥海 不二夫 榊 剛史 吉田 光男
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 (ISSN:13460714)
巻号頁・発行日
vol.35, no.4, pp.F-K45_1-7, 2020-07-01 (Released:2020-07-01)
参考文献数
20
被引用文献数
21

The spread of COVID-19, the so-called new coronavirus, is currently having an enormous social and economic impact on the entire world. Under such a circumstance, the spread of information about the new coronavirus on SNS is having a significant impact on economic losses and social decision-making. In this study, we investigated how the new type of coronavirus has become a social topic in Japan, and how it has been discussed. In order to determine what kind of impact it had on people, we collected and analyzed Japanese tweets containing words related to the new corona on Twitter. First, we analyzed the bias of users who tweeted. As a result, it is clear that the bias of users who tweeted about the new coronavirus almost disappeared after February 28, 2020, when the new coronavirus landed in Japan and a state of emergency was declared in Hokkaido, and the new corona became a popular topic. Second, we analyzed the emotional words included in tweets to analyze how people feel about the new coronavirus. The results show that the occurrence of a particular social event can change the emotions expressed on social media.
著者
榊 剛史 鳥海 不二夫 大知 正直
出版者
一般社団法人 人工知能学会
雑誌
人工知能学会全国大会論文集 第33回 (2019)
巻号頁・発行日
pp.2D4OS1a01, 2019 (Released:2019-06-01)

フェイクニュースや炎上,エコチェンバー現象など,近年は個人による情報発信における負の側面が注目されている.しかし,近年のソーシャルメディア上の情報拡散は大規模かつ複雑な現象となっており,人間が全体像を直観的に理解することが難しい. そこで本稿では,ソーシャルメディア上の情報拡散を直観的に理解可能な形で可視化する手法を提案する.具体的には、ソーシャルメディア上の社会ネットワークにクラスタリングを再帰的に適用し,コミュニティの階層構造を構築する.これらの階層構造を用いて,情報拡散を可視化する.階層構造を用いることで,複雑な現象をより単純な構造へ変換し,それにより人間の直観的な理解を促す.提案手法を実際のTwtiter上の大規模情報拡散事例に適用し,妥当な可視化結果が得られることを確認した.
著者
榊原 英輔
出版者
科学基礎論学会
雑誌
科学基礎論研究 (ISSN:00227668)
巻号頁・発行日
vol.44, no.1-2, pp.55-75, 2017 (Released:2017-09-07)
参考文献数
62
被引用文献数
1

The concept of mental illness has been challenged by various parties and with various background concerns. In this paper, I will discuss how mental illness is defined, as far as it is considered as a title to special treatment. The essentialism about mental illness insists that mental illness is distinguished from other harmful human conditions by some scientific criteria. Three essentialistic theories―physical lesion, biological disadvantage,and evolutionary dysfunction theories―are reviewed, and it is shown that they all fail to appropriately distinguish illness from normality. I will alternatively defend the anti-essentialism about mental illness,which characterize mental illness as harmful human conditions that are best treated by psychiatric professionals.
著者
榊 剛史 鳥海 不二夫
出版者
人工知能学会
雑誌
2018年度人工知能学会全国大会(第32回)
巻号頁・発行日
2018-04-12

フェイクニュースや炎上,エコチェンバー現象など,近年は個人による情報発信における負の側面が注目されている.我々は,それらの現象を引き起こす原因の一つとして,ソーシャルポルノという仮説を提案する.ソーシャルポルノとは,「特定のコミュニティに属するユーザが、脊髄反射的に拡散・共有してしまいたくなる情報」を意味する.本論文では,ソーシャルポルノの観測を行う前段階として,ユーザ反応時間という尺度を定義し,いくつかのツイートについて,ユーザ反応時間分布の違いを考察した.結果として,特定のコミュニティのユーザが拡散する投稿とランダム抽出した投稿には,ユーザ反応時間の分布に違いが生じる可能性が示唆された.
著者
原口 哲子 髙橋 佳子 大久保 晃樹 西小野 美咲 榊 美紀 原口 優清
出版者
日本緩和医療学会
雑誌
Palliative Care Research (ISSN:18805302)
巻号頁・発行日
vol.14, no.3, pp.197-201, 2019 (Released:2019-08-27)
参考文献数
15

【緒言】解熱鎮痛剤であるアセトアミノフェンはWHO(世界保健機関)方式がん疼痛治療法では代表的な薬剤の一つとして位置づけられている.【症例】75歳,女性. 左上葉肺がん術後再発.多発骨転移によるがん疼痛に対しアセトアミノフェンを使用していたが,同薬剤の商品を変更しアレルギー症状が出現したため中止し,症状は消失した.同薬剤の別の商品へ変更し継続した.【考察】アレルギー症状はアセトアミノフェンの添加剤が原因と推察された.【結論】アセトアミノフェンによるアレルギー症状の出現時,規格を変更することで薬剤使用を継続できる可能性がある.
著者
狩野 学 手計 太一 木内 豪 榊 茂之 山田 正
出版者
Japan Society of Civil Engineers
雑誌
水工学論文集 (ISSN:09167374)
巻号頁・発行日
vol.48, pp.193-198, 2004-02-01 (Released:2010-06-04)
参考文献数
8
被引用文献数
4 4

The large-scale social experiment, which many citizens including media representative participated for evaluating the effects of the watering on the “Heat Island Effect”, was carried out in Tokyo Metropolitan in Aug. 25 2003. About 14000l. water were sprinkled for about 20 minutes from noon. Air temperature and humidity were measured by moving observation system and fixed observation system at watering area in Eastern Tokyo. After the watering, the air temperature difference between outside and inside of watering area increases, and its difference was about 0.5°C. Temperature of watering area is lower than the temperature of outside area of watering after the watering. The effect of the watering was verified using the numerical simulation based on MM5. As a result of this analysis, air temperature degreased 2-2.5°C in watering area after the watering.
著者
鳥海 不二夫 篠田 孝祐 栗原 聡 榊 剛史 風間 一洋 野田 五十樹
出版者
一般社団法人電子情報通信学会
雑誌
電子情報通信学会技術研究報告. AI, 人工知能と知識処理 (ISSN:09135685)
巻号頁・発行日
vol.112, no.94, pp.19-24, 2012-06-14

本論文では,東日本大震災時の前後にTwitterに投稿された約4億のTweetを用いて,震災がTwitterを用いたリツイート行動に与えた影響を分析した.リツイートの時系列を混合正規分布を用いてモデル化し,震災直後にはリツイートが行われるタイミングが短くなり多くの情報が素早く大勢のユーザに共有されたことを明らかにした.また,得られたモデルをクラスタリングすることで,リツイートの時系列変化を5パターンに分類しそれぞれの特徴を分析し,各パターンの出現数が震災前後でどのように変化したかを確認した.
著者
岡田 佳之 榊 剛史 鳥海 不二夫 篠田 孝祐 風間 一洋 野田 五十樹 沼尾 正行 栗原 聡
出版者
一般社団法人 人工知能学会
雑誌
人工知能学会全国大会論文集 第27回全国大会(2013)
巻号頁・発行日
pp.3I4OS14b1i, 2013 (Released:2018-07-30)

本研究では,Twitterにおけるデマ・流言問題に着目し,デマならびにデマの訂正情報の拡散の仕方を4つのクラスに分類する.デマの拡散に対し,病気の感染モデルとして有名なSIRモデルに基づく「デマ拡散SIR拡張モデル」を提案し,東日本大震災における実際のデマ拡散が再現できるかを検証した.その結果,デマならびにデマの訂正情報の拡散がそれぞれ1回のピークを持つ事例において再現可能であることを確認した.
著者
榊原 彩子
出版者
日本教育心理学会
雑誌
教育心理学研究 (ISSN:00215015)
巻号頁・発行日
vol.44, no.1, pp.92-101, 1996-03
被引用文献数
1

According to previous theories, effects of repeated exposure of music on pleasingness depend on uncertainty of the music. In this study, "redundancy of rhythm pattern" and "prototypicality of harmony" were manipulated as the factors of uncertainty. The purpose of the following study is to examine effects of repeated exposure on pleasingness determined by the two above mentioned factors. Subjects heard tone sequences that represented four levels of redundancy and four levels of prototypicality, and rated them on 7-point scales of "complexity" and "pleasingness". Pleasingness was shown to be an inverted U-function of redundancy and prototypicality. And then, each tone sequence was repeated and rated pleasingness after each repetition. In a case of sequence whose redundancy caused most pleasingness before repetition, pleasingness of that sequence was decreased by repetition. But, in a case of sequence whose redundancy was too low to cause pleasingness before repetition, pleasingness was seen increased by repetition. On the other hand, pleasingness determined by prototypicality was not affected by repetition, and kept initial pleasingness during repetition.

28 0 0 0 OA 分類と対話

著者
榊原 英輔
出版者
The Philosophy of Science Society, Japan
雑誌
科学哲学 (ISSN:02893428)
巻号頁・発行日
vol.53, no.1, pp.89-102, 2020-09-30 (Released:2020-09-30)
参考文献数
19

This is a review essay on Kohji Ishihara's Philosophy of Mental Disorder: From Classification to Dialogue. The book is a collection of Ishihara's recent works. Part Ⅰ of the book discusses the history of psychiatry that originally excluded those with mental disorders from the dialogue on psychiatry. Part Ⅱ describes the ever-changing nature of the classification of mental disorders. In Part Ⅲ, he presents what he calls the “dialogical approach” to mental disorders as a promising alternative way of doing psychiatry. The structure and subtitle of the book convey the message that the practice of classifying mental disorders will be superseded by the dialogue with those with mental disorders in the future. Contrary to this message, based on the notion of epistemic injustice proposed by Fricker, I argue that the classification of mental disorders has both merits and demerits for those whose disorders are thus classified, and that the classification of mental disorders will continue to assume the role of the starting point of such dialogue in the future.

28 0 0 0 OA 解説梵語学

著者
榊亮三郎 著
出版者
古義真言宗聯合大学
巻号頁・発行日
vol.〔正篇〕, 1907