Dynamics of a superfluid vortex and the Magnus force.HiroyukiYabu &Hiroshi Kuratsuji -1997 -Foundations of Physics 27 (11):1585-1599.detailsWe study the dynamics of a vortex in superfluid He4. This is carried out by deriving the effective Lagrangian for the center of the vortex by starting with the time-dependent Ginzburg-Landau formalism. From the resultant equation of motion for a vortex, we arrive at a novel aspect for the Magnus force which has long been known in fluid dynamics. This force has a geometric origin and is expected to occur in other form of condensates such as vortex excitations for quantum (...) Hall fluids or ferromagnets. We also consider the force of non geometric origin, the pinning force coming from the impurity. (shrink)
KatōHiroyuki bunsho.Hiroyuki Katåo,Katsumi Ueda,Hirotaka Fukushima &Kåoji Yoshida -1990 - Kyōto-shi: Dōhōsha. Edited by Katsumi Ueda, Hirotaka Fukushima & Kōji Yoshida.details1-2. Sōkō -- 3. KatōHiroyuki kōen zenshū ; Shizen to rinri ; Kokka no tōchiken ; Sekininron ; Jinsei no shizen to waga kuni no zento.
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Transcription factors regulate early T cell development via redeployment of other factors.Hiroyuki Hosokawa,Kaori Masuhara &Maria Koizumi -2021 -Bioessays 43 (5):2000345.detailsEstablishment of cell lineage identity from multipotent progenitors is controlled by cooperative actions of lineage‐specific and stably expressed transcription factors, combined with input from environmental signals. Lineage‐specific master transcription factors activate and repress gene expression by recruiting consistently expressed transcription factors and chromatin modifiers to their target loci. Recent technical advances in genome‐wide and multi‐omics analysis have shed light on unexpected mechanisms that underlie more complicated actions of transcription factors in cell fate decisions. In this review, we discuss functional dynamics (...) of stably expressed and continuously required factors, Notch and Runx family members, throughout developmental stages of early T cell development in the thymus. Pre‐ and post‐commitment stage‐specific transcription factors induce dynamic redeployment of Notch and Runx binding genomic regions. Thus, together with stage‐specific transcription factors, shared transcription factors across distinct developmental stages regulate acquisition of T lineage identity. (shrink)
Viewpoint Invariance of Eye Size Illusion Caused by Eyeshadow.Hiroyuki Muto,Mayu Ide,Akitoshi Tomita &Kazunori Morikawa -2019 -Frontiers in Psychology 10.detailsPrevious research found that application of eyeshadow on the upper eyelids induces overestimation of eye size. The present study examined whether this eyeshadow illusion is dependent on or independent of viewpoint. We created a three-dimensional model of a female face and manipulated the presence/absence of eyeshadow and face orientation around the axis of yaw (Experiment 1) or pitch (Experiment 2) rotation. Using the staircase method, we measured perceived eye size for each face stimulus. Results showed that the eyeshadow illusion occurred (...) regardless of face orientation around axes of both yaw and pitch rotations. Crucially, the illusion’s magnitude did not vary across face orientations; lack of interaction between the illusion’s magnitude and face orientation was confirmed by small values of Bayes factors. These findings ruled out the hypothesis that eyeshadow serves as a depth cue and leads to overestimation of eye size due to size-distance scaling. Alternatively, the present findings suggest that the eyeshadow illusion can be well explained by the assimilation between the eyes and eyeshadow, which also facilitates assimilation between the eyes and eyebrows. Practical implications and the present findings’ generalizability are also discussed. (shrink)
Lost Japan: focusing on the problems of globalism and nationalism in moral education.Hiroyuki Sakuma -forthcoming -Journal of Philosophy of Education.detailsThis article analyses, both historically and systematically, the underlying causes of specific characteristics of globalism and nationalism in Japan focusing on an ideological moral education that lies at the heart of the problems of Japanese education. The analysis highlights two issues: (1) There is no real globalism in modern Japan. Certainly, the globalization of industry, government, and academia is now loudly proclaimed in Japan. However, in the name of globalization, English education is overemphasized. (2) There is no real nationalism in (...) modern Japan. Japan once had a nationalism centred on the emperor system from the Meiji era. However, after World War II, the emperor system in Japan was dismantled and a democratic Japanese Constitution was enacted under the influence of the Allied Powers. Furthermore, in the Basic Act on Education, the theory of ‘the perfection of personality’ based on Kant’s philosophy was transplanted. Education in post-war Japan developed under a democratic constitution and the Basic Act on Education, which states that the purpose of education is ‘the perfection of personality’. This means that education has a strong moral flavour. Particularly at the stage of compulsory education in Japan, which is the foundation of national education, moral education is addressed through all educational activities at school. Therefore, the issues of globalism and nationalism in moral education, which this article deals with, belong directly to core problems of Japanese education. (shrink)
Nihon kinsei shisōshi kenkyū.Hiroyuki Tamakake -2008 - Tōkyō: Perikansha.details日本朱子学、日本陽明学、徂徠学、幕末思想など、代表的な思想家たちの歴史観/政治観を軸に近世を俯瞰する著者の代表研究。.
Theology, ethics and metaphysics: Royal Asiatic Society classics of Islam.Hiroyuki Mashita (ed.) -2003 - New York: Edition Synapse.detailsThis collection of classic works from the mid-nineteenth through mid-twentieth centuries was originally published under the auspices of the Royal Asiastic Society. Spanning over 100 years in oriental scholarship, primary texts include work by Frederic Rosen, W.F. Thompson, C. Edward Sachau, R.A. Nicholson, W.H.T. Gairdner, W.M. Miller, James Robson, and many others.
Underlying mechanisms that ensure actomyosin‐mediated directional remodeling of cell–cell contacts for multicellular movement.Hiroyuki Uechi &Erina Kuranaga -2023 -Bioessays 45 (5):2200211.detailsActomyosin (actin‐myosin II complex)‐mediated contractile forces are central to the generation of multifaceted uni‐ and multi‐cellular material properties and dynamics such as cell division, migration, and tissue morphogenesis. In the present article, we summarize our recent researches addressing molecular mechanisms that ensure actomyosin‐mediated directional cell–cell junction remodeling, either shortening or extension, driving cell rearrangement for epithelial morphogenesis. Genetic perturbation clarified two points concerning cell–cell junction remodeling: an inhibitory mechanism against negative feedback in which actomyosin contractile forces, which are well known (...) to induce cell–cell junction shortening, can concomitantly alter actin dynamics, oppositely leading to perturbation of the shortening; and tricellular junctions as a point that organizes extension of new cell–cell junctions after shortening. These findings highlight the notion that cells develop underpinning mechanisms to transform the multi‐tasking property of actomyosin contractile forces into specific and proper cellular dynamics in space and time. (shrink)
Shin kōgakuchi.Hiroyuki Yoshikawa,Toshiharu Taura,Teruo Koyama &Masatoshi Itō (eds.) -1997 - Tōkyō: Tōkyō Daigaku Shuppankai.detailsエンジニアの「知」は21世紀を拓けるか。モノを「つくる」とは、どういうことか。技術者の心に由来する「知」のありように迫る。技術における「知」の現代性を確認する。.
Formal reconciliatory dialogue based on shift from forward to backward deliberation†.Hiroyuki Kido &Federico Cerutti -2016 -Argument and Computation 6 (3):292-309.detailsVolume 6, Issue 3, September 2015, Page 292-309.
A Bayesian approach to forward and inverse abstract argumentation problems.Hiroyuki Kido &Beishui Liao -2022 -Journal of Applied Non-Classical Logics 32 (4):273-304.detailsThis paper studies a fundamental mechanism by which conflicts between arguments are drawn from sentiments regarding acceptability of the arguments. Given sets of arguments, an inverse abstract argumentation problem seeks attack relations between arguments such that acceptability semantics interprets each argument in the sets of arguments as being acceptable in each of the attack relations. It is an inverse problem of the traditional problem we refer to as the forward abstract argumentation problem. Given an attack relation, the forward abstract argumentation (...) problem seeks sets of arguments such that acceptability semantics interprets each argument in the sets of arguments as being acceptable in the attack relation. We give a probabilistic model of argumentation-theoretic inference. It is a generative model formalising the process by which acceptability semantics interprets acceptability of arguments in a given attack relation. We show that it gives a broad view of solutions to the forward and inverse abstract argumentation problems. Specifically, solutions to the inverse and forward abstract argumentation problems are shown to be equivalent to a maximum likelihood estimate and maximum likelihood prediction, respectively, which are both available with the generative model. In addition, they are shown to be special cases of the posterior distribution and the evidence, respectively, which are both obtained by probabilistic inference on the generative model. We report an experiment result and application example of the generative model in the inverse problems. (shrink)
Ronrigaku kōkyū: aporia e no chōsen.Hiroyuki Tobe -2012 - Tōkyō: Tōkyō Tosho Shuppankai.details簡潔性、実用性に卓越したQuineの『方法』を詳説、それに基づきG ̈odelやChurchの定理を含む、標準的な論理学を厳密に展開する。また、認識論理学の「自然演繹法」化の、1つの可能性を提案する。更に、「超実数」の必要性を強調し、それにより種々のアポリア(パラドッ クス等)の解明を試みる。.
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Survey on the Recent Studies of the Role of Diagrams in Mathematics from the Viewpoint of Philosophy of Mathematics.Hiroyuki Inaoka -2014 -Kagaku Tetsugaku 47 (1):67-82.detailsIn this paper, we would present an overview of the recent studies on the role of diagram in mathematics. Traditionally, mathematicians and philosophers had thought that diagram should not be used in mathematical proofs, because relying on diagram would cause to various types of fallacies. But recently, some logicians and philosophers try to show that diagram has a legitimate place in proving mathematical theorems. We would review such trends of studies and provide some perspective from viewpoint of philosophy of mathematics.
Equivalent comparisons of information channels.Hiroyuki Nakata -2011 -Theory and Decision 71 (4):559-574.detailsThis article constructs a static model of information acquisition when the agent does not know exactly what pieces of information he is missing. A representation of preferences over information channels and menus of lotteries is shown by adapting the model of unforeseen contingencies by Dekel et al. (Econometrica 69:891–934, 2001; Econometrica 75:591–600, 2007), which is an extension of Kreps (Econometrica 47:565–576, 1979; Economic analysis of markets and games: essays in honor of Frank Hahn, 1992). Also, characterisation of informativeness of an (...) information channel analogous to the one by Blackwell (Ann Math Stud 24:265–272, 1953) is examined in conjunction with the preference for flexibility by applying the structure of Shapley value. (shrink)
Development and validation of a facial expression database based on the dimensional and categorical model of emotions.Tomomi Fujimura &Hiroyuki Umemura -2018 -Cognition and Emotion 32 (8):1663-1670.detailsABSTRACTThe present study describes the development and validation of a facial expression database comprising five different horizontal face angles in dynamic and static presentations. The database includes twelve expression types portrayed by eight Japanese models. This database was inspired by the dimensional and categorical model of emotions: surprise, fear, sadness, anger with open mouth, anger with closed mouth, disgust with open mouth, disgust with closed mouth, excitement, happiness, relaxation, sleepiness, and neutral. The expressions were validated using emotion classification and Affect (...) Grid rating tasks [Russell, Weiss, & Mendelsohn, 1989. Affect Grid: A single-item scale of pleasure and arousal. Journal of Personality and Social Psychology, 57, 493–502]. The results indicate that most of the expressions were recognised as the intended emotions and could systematically represent affective valence and arousal. Furthermore, face angle and facial motion information influenced emot... (shrink)