In recent years, neural networks have attracted much attention in the machine learning and the deep learning technologies. Bio-inspired functions and intelligence are also expected to process efficiently and improve existing technologies. In the visual pathway, the prominent features consist of nonlinear characteristics of squaring and rectification functions observed in the retinal and visual cortex networks, respectively. Further, adaptation is an important feature to activate the biological systems, efficiently. Recently, to overcome short-comings of the deep learning techniques, orthogonality for the (...) weights in the networks has been developed for the signal propagation and the efficient optimization of the learning. In this paper, bio-inspired asymmetric networks with nonlinear characteristics are proposed, which are derived from the retinal networks in the biological visual pathway. The asymmetric network proposed here was verified to detect the movement of the object, efficiently in our previous studies. This paper shows a new characteristic of the adaptive orthogonality in the asymmetric networks. First, it is shown that the asymmetric network with nonlinear characteristics is effective for generating orthogonality. Second, the proposed asymmetric network with Gabor filters is compared with the conventional energy model from the point of the orthogonality characteristics. Finally, the asymmetric networks with nonlinear characteristics can generate the extended orthogonal bases in independent subspaces, which are useful for classification and efficient learning. (shrink)

dai 1-kan. Ningen, kyōiku ga umarekawaru tame -- dai 2-kan. Ningen to no deai, kyōiku to no deai -- dai 3 kan. Ningenrashiku naru tedate -- dai 4-kan. Jinrui no kibō, osanago -- dai 5-kan. Shishū, ushinawareta kisetsu o motomete -- dai 6-kan. Aru mazushiki shōgai no kiroku -- [7] Kyōiku to kyōikugaku.

『日本唯物論史』などで知られるわが国の唯物論哲学の開拓者・永田廣志の生涯をまとめ、その理論活動の意義を解明。哲学研究者と在野の郷土史家との共同研究が生み出した成果。本邦初公開の貴重な資料や秘蔵写真も多 数紹介。.

Minami–Sakai :883–898, 2016) investigated the cofinal types of the Katětov and the Katětov–Blass orders on the family of all \ ideals. In this paper we discuss these orders on analytic P-ideals and Borel ideals. We prove the following:The family of all analytic P-ideals has the largest element with respect to the Katětov and the Katětov–Blass orders.The family of all Borel ideals is countably upward directed with respect to the Katětov and the Katětov–Blass orders. In the course of the proof of (...) the latter result, we also prove that for any analytic ideal \ there is a Borel ideal \ with \. (shrink)

We give simple proofs of the Singular Cardinal Hypothesis from the Weak Reflection Principle and the Fodor-type Reflection Principle which do not use better scales.

A proof is given for the theorem that at least one bound state exists in a one-dimensional attractive potential however weak it may be. The proof is constructive in that it provides a method to explicitly solve the eigenvalue problem for the eigenvalues as well as the eigenfunctions. The method is well suited to precise numerical calculations.

『不思議の国のアリス』の数学観から、古代ギリシャから現代への懐疑主義思想との格闘をたどって、数学的知識の成立根拠を探る。.

This paper presents a new method that improves robustness of real-coded Genetic Algorithm (GA) for function optimization. It is reported that most of crossover operators for real-coded GA have sampling bias, which prevents to find the optimum when it is near the boundary of search space. They like to search the center of search space much more than the other. Therefore, they will not work on functions that have their optima near the boundary of the search space. Although several methods (...) have been proposed to relax this sampling bias, they could not cancel whole bias. In this paper, we propose a new method, Toroidal Search Space Conversion (TSC), to remove this sampling bias. TSC converts bounded search space into toroidal one without any parameter. Experimental results show that a GA with TSC has higher performance to find the optimum near the boundary of search space and the GA has more robustness concerning the relative position of the optimum. (shrink)

I examine the tension between biopolitics and necropolitics through three themes that I have perceived and that are related to my life in Japan. First, I examine the transformation of hospitals and medical care, particularly for the elderly, through my experience of sharing the end of my mother’s life. Modern medicine has made great achievements in treating diseases that used to be fatal, but it has become institutionalized in the context of Big Pharma interests, with no insight into the natural (...) ageing and death of human beings. Second, I discuss how the ecological worldview on parasitism and symbiosis has been distorted by industrial logic, drawing on the work of my esteemed friend and parasitologist Professor Koichiro Fujita, who passed away in 2021. Finally, with regard to the Covid-19 pandemic, I would argue that it is not a sudden phenomenon triggered by a new virus, but in a sense a disaster that has been prepared for decades and must be seen as a war using bioengineering and epidemiology as weapons, rather than tanks and bombs. (shrink)

In this paper we will study a formal system of intuitionistic modal predicate logic. The main result is its semantic completeness theorem with respect to algebraic structures. At the end of the paper we will also present a brief consideration of its syntactic relationships with some similar systems.

双子のようによく似たギリシャ懐疑哲学と仏教の〈空〉の思想。両者を丹念に読み解くとき、透徹した「縁起=言語ゲーム」の世界に揺らめくわれわれの生の真実が浮かびあがる。ウィトゲンシュタインを起点に世界史的規 模で展開する哲学の本当の意味を求める旅。.

Il s’agit ici de mettre en évidence une propriété de la beauté, à la fois subtile et évidente, mais largement ignorée de l’esthétique occidentale : la capacité du beau à embellir ce qui l’entoure. L’analyse s’appuie sur le commentaire d’un waka d’Akiko Yosano et étudie les proximités et les différences de cette beauté embellissante et de concepts philosophiques européens qui s’en rapprochent : l’éclat selon Platon, l’aura selon W. Benjamin, et le cérémonial, selon H. Kuhn.

L’exposition d’art dans des paysages est devenu populaire au Japon, avec la multiplication récente de festivals d’art locaux. Dans ces festivals, qui attirent chacun des centaines de milliers de visiteurs, coexistent des œuvres hétérogènes. Certaines sont des sculptures autonomes, d’autres des installations qui se fondent dans le paysage, et d’autres encore sont des œuvres de type « art relationnel ». Bien que ces œuvres in situ affirment leur lien essentiel avec le site naturel rural et avec le corps du spectateur (...) — constituant un événement, une expérience, une rencontre éphémère —, les relations avec le site comme avec le visiteur sont complexes et ambigües. Il y a des œuvres in situ, mais parfois aussi in aliquo situ : des œuvres qui peuvent être installées n’importe où. Qu’est-ce qui attire les visiteurs dans ces expositions? Quels sont donc la nature et le mérite de leur localisation? Si les visiteurs apprécient de voir des œuvres dans ces paysages cela peut être en partie lié au principe japonais traditionnel d’expérience des lieux dit meisho-meguri, ou « pèlerinage vers des sites célèbres ». Cette pratique issue du Moyen Âge est associée historiquement au sacré. Aujourd’hui ce pèlerinage prend la forme du tourisme moderne mais conserve un sens traditionnel invisible car les visiteurs se déplacent à travers une série de lieux géographiques selon un jeu culturellement codé. Selon nous, dans le cas des visites d’œuvres d’art en zones rurales, l’appréciation des œuvres d’art participe à ce même jeu traditionnel de se déplacer physiquement dans une série de lieux. Cette dimension spirituelle implicite modifie à son tour la perception des œuvres. Ainsi on dira que la pratique japonaise de visiter ces expositions d’art in situ témoigne de la survivance d’une tradition, et constitue ainsi un système alternatif d’expérience esthétique. The installations of artwork in natural landscapes have become popular in Japan with the recent increase in local art festivals. In these art festivals where hundreds of thousands of visitors gather, heterogeneous installations coexist; some are autonomous sculptures, some are fused into the natural landscape, and some belong to “relational art”. Although most works assert the essential quality of their location, and the experience as “an event”, their relationships to the rural areas and to the body of the visitor are complex and ambiguous. Some works are really in situ, but some are in aliquo situ—that is, works that could be installed anywhere. What attracts visitors to these exhibitions? Hence what is the nature and merit of the location? What is the relation to the visitor’s bodily presence? If visitors enjoy the site-specificity of the artwork this may be linked to the traditional Japanese system of experiencing places as meisho-meguri—i.e. “a pilgrimage to a series of famous sites”. This practice comes from the Middle Ages and was by then spiritual. While today these pilgrimages appear as a form of modern tourism, they retain a culturally coded character because visitors’s journey is like “a game of visiting a series of geographical places”. According to me, in the case of the visit of artistic sites, the appreciation of the artwork participates in this same game of bodily displacement to a series of places. This implicit spiritual underpinning conversely modifies the visitor’s perception of the works. Thus I propose that visiting artistic sites in natural settings in Japan appears as informed by this Japanese particular tradition, and thus constitutes an alternative system of contemporary aesthetic experience. (shrink)