Understanding whether the long and elaborate songs of male gibbons have syntax and hierarchical structures is an interesting question in the evolution of language, because gibbons are near humans in the phylogenetic tree and a hierarchically organized syntax is considered to be a basic component of human language. We conducted field research at Danum Valley Conservation Area in northern Borneo to test the hypothesis that gibbon songs have syntax and chunks. We followed one Mueller’s gibbon group for 1 week in (...) the dry and rainy seasons every year from 2001 to 2009, collecting vocal and behavioral data. Results show that songs emitted by the studied male gibbon were governed by combinatory rules. Some context-dependent songs had different combinatory rules, although they overlapped with the songs whose contexts were uncertain. The male Mueller’s songs had characteristics that suggest existence of chunk structure. These results provided an important perspective in the study of language origin. (shrink)

Mueller's gibbons ( Hylobates muelleri ) sing both sex-specific and duet songs. These songs are thought to be involved in territory maintenance, as well as the maintenance of pair or family bonds. However, few observational studies have examined how gibbons interact with their neighbors through song in the wild. We have been conducting field observations of wild gibbon groups in northeast Borneo since 2001. In the Borneo Rainforest Lodge (BRL) and Danum Valley Field Center (DVFC) at the Danum Valley Conservation (...) Area (DVCA), we observed seven episodes of alternating songs between males. Here, we describe the process of song exchange between males. During male interactions, song bouts rarely overlapped and were alternately emitted. Several studies have reported antiphonal vocalizations in New World and Old World primate species, but rarely in apes. Our observations of antiphonal songs in gibbons indicate that gibbons not only unilaterally advertise information, but also interactively communicate with neighbors and family members through songs. Since gibbons are phylogenetically similar to humans, and turn-taking has an important role in human conversation, our research on gibbon communication may provide insight into the evolution of human language. (shrink)

Mueller’s gibbons sing both sex-specific and duet songs. These songs are thought to be involved in territory maintenance, as well as the maintenance of pair or family bonds. However, few observational studies have examined how gibbons interact with their neighbors through song in the wild. We have been conducting field observations of wild gibbon groups in northeast Borneo since 2001. In the Borneo Rainforest Lodge and Danum Valley Field Center at the Danum Valley Conservation Area, we observed seven episodes of (...) alternating songs between males. Here, we describe the process of song exchange between males. During male interactions, song bouts rarely overlapped and were alternately emitted. Several studies have reported antiphonal vocalizations in New World and Old World primate species, but rarely in apes. Our observations of antiphonal songs in gibbons indicate that gibbons not only unilaterally advertise information, but also interactively communicate with neighbors and family members through songs. Since gibbons are phylogenetically similar to humans, and turn-taking has an important role in human conversation, our research on gibbon communication may provide insight into the evolution of human language. (shrink)

Mating activity of a wild Mueller’s gibbon group was observed in the Danum Valley Conservation Area, Sabah, Malaysia. The purpose of this study was to investigate the function of copulation calls in gibbons. The female emitted copulation calls at the time of intromission and pelvic thrusting. Copulation calls were composed of two notes and one of them was sung only while mating. Approximately half of copulation calls were sung near the range boundary. Mating with copulation calls sometimes occurred while singing. (...) According to the model that female copulation calls have evolved under the selective pressures of risk of infanticide and sperm competition, copulation calls should be rare in species with little female promiscuity. As gibbons usually live in pair-living social organization and have a monogamous mating system, no vocal signals by female gibbons are considered to be needed. However, clear copulation calls were emitted by the female. It suggests that the relationship between paired gibbons is unstable. Copulation calls by the female Mueller’s gibbon may function to increase mate guarding and strengthen the pair bond. (shrink)

京都を知る，アルゴリズムを知る。アルゴリズムとはそもそも，何か物事を行うときの“具体的手順”のことである。私たちは日々，意識するかしないかに関わらず，次々とアルゴリズムの設計をしながら生活をしている。 本書は，岩間一雄教授が京都の町を題材にアルゴリズムの思考を伝える，読み物的手法をとった数学書である。読者はその奥深い世界へと誘われてゆくだろう。 巻末には本書で取り上げた京都関連の名所・行事などの索引があり，逆引きで読んでいくことができる。 【目次】 1．斜め横断 2．アイドルタイム 3．人事部長の悩み 4．チームワーク 5．神様との勝負 6．アルゴリズムからメカニズムへ 7．一番でなくとも 8．千年に1回も起こらない 9．自分のページランクを上げたい 10．対話のアルゴリズム 11．ビットコインの素晴らしさ 12．P対NP問題：ノーベル賞以上？ 13．アルゴリズムから見た進化論.

解きやすい離散最適化問題に対して統一的な枠組を与える「離散凸解析」の全体像を平易に解説.

明治の世には、西欧的近代化の流れの中にあっても「日本人としての矜持と風格」といったものがあった。それはいわば凜乎とした倫理意識と、土着的な共同体意識である。それらは漢籍の教養に裏打ちされた至高なる精神 性であったと言ってよい。明治は、思想・文化の面において、日本の精神史上、「豊饒の時代」であった。.

Originally published as 「明治の哲学界：有機体の哲学とその系譜」in 井上克人編『豊饒なる明治』, Kansai Daigaku Shuppannbu, 2012, 3–22. Translated by Morisato Takeshi. German Idealism was introduced to Japanese intellectuals in the middle of Meiji era and was mainly received from a mystical or religious perspective, as we see in Inoue Tetsujirō’s “harmonious existence,” Inoue Enryō’s “unity of mind and body,” and Kiyozawa Manshi’s “existentialism.” Since these theories envisioned true reality as a unified and living whole, I group them under the label “philosophy of organism” and from (...) there argue that their conviction that “all is truth and truth is all” was shaped in large part by the Awakening of Faith in the Mahayana. The understanding of Buddhist concepts by Meiji philosophers was philosophical in its content, and those who devoted themselves to the study of Western philosophy were encouraged to describe Eastern thought in Western philosophical terms. As a result, the philosophical world of the Meiji era developed an original standpoint that unified Eastern and Western perspectives by means of a logic of “phenomena-in-reality.”. (shrink)

日本古来の神々の色、陰陽五行説の色、武将たちに愛された色、雅な平安の色、粋な大江戸の色彩から、昭和の流行色まで、ビジュアルで辿る日本の色を探る旅。.

本書は、生活者のハピネス(豊かさや幸せ)の視点から科学技術や社会の変革を考える『因果関係から相関へ、個別技術からシステムへ』と題した『武田シンポジウム2018』の内容をまとめたものです。昨今最も注目を 浴びている科学技術である「AI」、「免疫システム研究」、「民間宇宙ロケット開発」の3つと異なる切り口から、ビッグデータと言われる時代の科学の方法論、個の集積以上の意味をもつシステムとしてのアプローチに ついて立体的に考察します。.

In contemporary political philosophy, reflections on poverty demand careful treatment in the light of key ethical concepts—especially autonomy. While the negative effects of poverty on autonomy are acknowledged, the welfare dependency of the poor is seen as an autonomy-undermining factor, which I call the “autonomy–poverty dilemma.” This chapter discusses contemporary political theories about autonomy and poverty in terms of how they relate to this dilemma. The features and problems of three pertinent theories are addressed in such a way as to (...) resolve the autonomy–poverty dilemma. The first is luck egalitarianism, which weighs individual responsibility in defining just distributions, but may leave some of the incapacitated unattended in order not to annul their personal responsibility and may stigmatize those who are dependent (such as people with mental disabilities) who are not personally responsible. Such stigmatization is also a problem with relational egalitarianism, which bases egalitarian justice on the equal standing of individuals, in that the ideal of socially embedded autonomous agents could be degrading to the dependent. While the capability approach overcomes that problem by providing a powerful buttress for the dependent and allowing them to emerge from poverty, it runs the risk of a paternalistic, perfectionist idealism. In closing, this chapter proposes an alternative view, which I call the “radical pluralist view of egalitarian justice,” based on a consideration of the features and problems of these three key theories. (shrink)

The purpose of this paper is to show the plausibility of John Rawls’s treatment of efficiency within the system of justice. While in political philosophy efficiency is often treated as an independent condition for establishing justice, or more precisely, as a necessary condition for establishing justice, Rawls considers efficiency as a non-negligible factor that has normativity in general circumstances. This is similar to the view that efficiency is a presumptive condition for evaluating social arrangements. However, Rawls’s view is salient in (...) a more substantive way. This paper demonstrates the salience of Rawls’s view of efficiency by responding to G. A. Cohen’s Impure Justice Objection to Rawls’s theory of justice. This shows that there is no impure connection between Rawls’s justice and efficiency. Moreover, the combined thesis of Rawls’s justice and efficiency is superior to Cohen’s pluralist theory of justice, making it a fruitful approach. (shrink)

関東大震災の三年後に始まった戦前昭和とは、審災復興=国家再建の歴史だった。社会主義、議会主義、農本主義、国家社会主義という四つの国家構想が、勃興しては次の構想に移っていく展開の過程として、戦前昭和を再 構成する。.