Hypersequent calculi for intuitionistic logic with classical atoms.Hidenori Kurokawa -2010 -Annals of Pure and Applied Logic 161 (3):427-446.detailsWe discuss a propositional logic which combines classical reasoning with constructive reasoning, i.e., intuitionistic logic augmented with a class of propositional variables for which we postulate the decidability property. We call it intuitionistic logic with classical atoms. We introduce two hypersequent calculi for this logic. Our main results presented here are cut-elimination with the subformula property for the calculi. As corollaries, we show decidability, an extended form of the disjunction property, the existence of embedding into an intuitionistic modal logic and (...) a partial form of interpolation. (shrink)
Is there something money can't buy?: In defence of the ontology of a market boundary.Hidenori Suzuki -2005 -Journal of Critical Realism 4 (2):265-290.detailsThis paper considers the boundary that separates marketable from non-marketable items. First, it examines the issue of blocked exchanges, that is, exchanges that cannot and/or should not take place. Second, it proposes to synthesise the seemingly separate issues of blocked exchanges from a single perspective based on critical realist ontology. Finally, it tackles some scepticism and criticism that has been levelled against the idea that ontology can be useful in determining a market boundary.
Interactions between neural cells and blood vessels in central nervous system development.Keiko Morimoto,Hidenori Tabata,Rikuo Takahashi &Kazunori Nakajima -2024 -Bioessays 46 (3):2300091.detailsThe sophisticated function of the central nervous system (CNS) is largely supported by proper interactions between neural cells and blood vessels. Accumulating evidence has demonstrated that neurons and glial cells support the formation of blood vessels, which in turn, act as migratory scaffolds for these cell types. Neural progenitors are also involved in the regulation of blood vessel formation. This mutual interaction between neural cells and blood vessels is elegantly controlled by several chemokines, growth factors, extracellular matrix, and adhesion molecules (...) such as integrins. Recent research has revealed that newly migrating cell types along blood vessels repel other preexisting migrating cell types, causing them to detach from the blood vessels. In this review, we discuss vascular formation and cell migration, particularly during development. Moreover, we discuss how the crosstalk between blood vessels and neurons and glial cells could be related to neurodevelopmental disorders. (shrink)
The Paradox of the Knower revisited.Walter Dean &Hidenori Kurokawa -2014 -Annals of Pure and Applied Logic 165 (1):199-224.detailsThe Paradox of the Knower was originally presented by Kaplan and Montague [26] as a puzzle about the everyday notion of knowledge in the face of self-reference. The paradox shows that any theory extending Robinson arithmetic with a predicate K satisfying the factivity axiom K → A as well as a few other epistemically plausible principles is inconsistent. After surveying the background of the paradox, we will focus on a recent debate about the role of epistemic closure principles in the (...) Knower. We will suggest this debate sheds new light on the concept of knowledge which is at issue in the paradox – i.e. is it a “thin” notion divorced from concepts such as evidence or justification, or is it a “thick” notion more closely resembling mathematical provability? We will argue that a number of features of the paradox suggest that the latter option is more plausible. Along the way, we will provide a reconstruction of the paradox using a quantified extension of Artemovʼs [2] Logic of Proofs, as well as a series of results linking the original formulation of the paradox to reflection principles for formal arithmetic. On this basis, we will argue that while the Knower can be understood to motivate a distinction between levels of knowledge, it does not provide a rationale for recognizing a uniform hierarchy of knowledge predicates in the manner suggested by Anderson. (shrink)
Resistance Training Combined With Cognitive Training Increases Brain Derived Neurotrophic Factor and Improves Cognitive Function in Healthy Older Adults.Luz Albany Arcila Castaño,Vivian Castillo de Lima,João Francisco Barbieri,Erick Guilherme Peixoto de Lucena,Arthur Fernandes Gáspari,Hidenori Arai,Camila Vieira Ligo Teixeira,Hélio José Coelho-Júnior &Marco Carlos Uchida -2022 -Frontiers in Psychology 13:870561.detailsBackground: The present study compared the effects of a traditional resistance training and resistance training combined with cognitive task on body composition, physical performance, cognitive function, and plasma brain-derived neurotrophic factor levels in older adults. Methods: Thirty community-dwelling older adults were randomized into TRT and RT+CT. Exercise groups performed a similar resistance training program, twice a week over 16 weeks. Cognitive Training involved performing verbal fluency simultaneously with RT. Exercise sessions were performed 2-3 sets, 8-15 repetitions at 60-70% of 1-repetition (...) maximum. Body composition, physical function, cognitive performance, and BDNF levels were assessed before and after intervention period. Results: The physical performance was similarly improved in response to both TRT and RT+CT. However, exclusive improvements on cognitive function and BDNF levels were observed only after RT+CT. Conclusion: The RT program associated with a cognitive task, improved physical and cognitive performance in healthy older adults. (shrink)
Six family genes—structure and function as transcription factors and their roles in development.Kiyoshi Kawakami,Shigeru Sato,Hidenori Ozaki &Keiko Ikeda -2000 -Bioessays 22 (7):616-626.detailsThe members of the Six gene family were identified as homologues of Drosophila sine oculis which is essential for compound-eye formation. The Six proteins are characterized by the Six domain and the Six-type homeodomain, both of which are essential for specific DNA binding and for cooperative interactions with Eya proteins. Mammals possess six Six genes which can be subdivided into three subclasses, and mutations of Six genes have been identified in human genetic disorders. Characterization of Six genes from various animal (...) phyla revealed the antiquity of this gene family and roles of its members in several different developmental contexts. Some members retain conserved roles as components of the Pax-Six-Eya-Dach regulatory network, which may have been established in the common ancestor of all bilaterians as a toolbox controlling cell proliferation and cell movement during embryogenesis. Gene duplications and cis-regulatory changes may have provided a basis for diverse functions of Six genes in different animal lineages. (shrink)