Cellular pattern formations of some epithelia are believed to be governed by the direct lateral inhibition rule of cell differentiation. That is, initially equivalent cells are all competent to differentiate, but once a cell has differentiated, the cell inhibits its immediate neighbors from following this pathway. Such a differentiation repeats until all non-inhibited cells have differentiated. The cellular polygonal patterns can be characterized by the numbers of undifferentiated cells and differentiated ones. When the differentiated cells become large in size, the (...) polygonal pattern is deformed since more cells are needed to enclose the large cell. An actual example of such a cellular pattern was examined. The pupal wing epidermis of a butterfly Pieris rapae shows a transition of the equivalent-size cell pattern to the pattern involving large cells. The process of the transition was analyzed by using the method of weighted Voronoi tessellation that is useful for treatment of irregularly sized polygons. The analysis supported that the pattern transition of the early stage of the pupal wing epidermis is governed by the lateral inhibition rule. The differentiation takes place in order of largeness, but not smallness, of the apical polygonal area in the differentiating region of the pupal wing. (shrink)

This paper compares two philosophical views from vastly different intellectual traditions: the views typical of neo-Aristotelian naturalism and the views that Kitarō Nishida describes in his An Inquiry into the Good. I concentrate on the following points. Nishida and neo-Aristotelian naturalists share the view that the mind tends to construct experience as it characterizes phenomena. It evaluates those that fulfill this tendency positively and those that fail to fulfill it negatively. Moral judgment is one manifestation of this tendency. This allows (...) both approaches to claim that the natural goodness/defect that characterizes human beings results from the capacity of rational choice, and that normalcy in developing and exercising this capacity provides criteria for evaluating the moral status of individuals. Nevertheless, they diverge on whether or not the application of these criteria is agent-neutral or agent-relative. Based on these considerations, I argue that Nishida’s view is free from a major difficulty that the neo-Aristotelian naturalist encounters. (shrink)

In bacteria, PriA protein, a conserved DEXH‐type DNA helicase, plays a central role in replication restart at stalled replication forks. Its unique DNA‐binding property allows it to recognize and stabilize stalled forks and the structures derived from them. Cells must cope with fork stalls caused by various replication stresses to complete replication of the entire genome. Failure of the stalled fork stabilization process and eventual restart could lead to various forms of genomic instability. The low viability of priA null cells (...) indicates a frequent occurrence of fork stall during normal growth that needs to be properly processed. PriA specifically recognizes the 3′‐terminus of the nascent leading strand or the invading strand in a displacement (D)‐loop by the three‐prime terminus binding pocket (TT‐pocket) present in its unique DNA binding domain. Elucidation of the structural basis for recognition of arrested forks by PriA should provide useful insight into how stalled forks are recognized in eukaryotes. (shrink)

LANGUAGE NOTE | Document text in Chinese; abstract also in English. 世界衛生組織(WHO)在歷經自1976年伊波拉病毒病(EbolaHemorrhagicFever, 伊波拉出血熱)爆發以來，處理疫情爆發當中出現的種種倫理問題之後，於2016年出版“Guidance for Managing Ethical Issues in Infectious Disease Outbreaks”（中文暫譯：《傳染病爆發處理倫理議題之指引》）一書，其中整理出「正義、行善、效益、尊重自主、自由、團結、互惠」等七項倫理原則，於今面對新冠肺炎（COVID-19）的疫情上，各國防疫 政策，亦可作為應對。作為一名當代墨者，本文即以此為基礎，由醫療的角度，結合國內情況，企欲在墨學義理內作一生命倫理的反思，並試圖對後疫情時代給予具體作為之建議。 In response to various ethical problems that emerged after the 1976 Ebola hemorrhagic fever epidemic, WHO published the book Guidance for Managing Ethical Issues in Infectious Disease Outbreaks in 2016. The content of the book was organized around seven ethical principles, namely, justice, beneficence, benefit, respect for autonomy, freedom, reciprocity, and unity. These seven ethical principles can be used as (...) a framework for countries to develop policies for coping with the COVID-19 pandemic. Drawing from contemporary Mohism, this paper reflects on the situation in Taiwan through the lens of these seven ethical principles. It aims to arrive at a Mohist understanding of bioethics and proposes concrete actions for the post-epidemic era. (shrink)

I am honored to have been invited to participate in this Workshop on Comparative Studies of Building Molecular Biology, with a discussion of Japanese experiences in constructing a science — in this case, the discipline of molecular biology. As I understand it, the construction of a science must be equivalent to building a new culture. My having given this title to my paper suggests that I have enough knowledge about the subject to perhaps even extrapolate its course into the future (...) — which I do not. What I do have is a sincere admiration of my old friends and colleagues, in Japan and elsewhere, who together tried to build a new science of molecular biology in Japan. (shrink)

狂信的な国粋主義者か、はたまた魂の尊厳を問うた求道者か。民俗学と国粋主義の親和性とは。多角的な視点からファシズムを再考する。.

Volume 20, Issue 8, August 2020, Page 32-36.

Real-world walking activity is important for poststroke patients because it leads to their participation in the community and physical activity. Walking activity may be related to adaptability to different surface conditions of the ground. The purpose of this study was to clarify whether walking adaptability on an uneven surface by step is related to daily walking activity in patients after stroke. We involved 14 patients who had hemiparesis after stroke and 12 healthy controls. The poststroke patients were categorized as least (...) limited community ambulators or unlimited ambulators. For the uneven surface, the study used an artificial grass surface. The subjects repeated even surface walking and the uneven surface walking trials at least two times at a comfortable speed. We collected spatiotemporal and kinematic gait parameters on both the even and uneven surfaces using a three-dimensional motion analysis system. After we measured gait, the subjects wore an accelerometer around the waist for at least 4 days. We measured the number of steps per day using the accelerometer to evaluate walking activity. Differences in gait parameters between the even and uneven surfaces were calculated to determine how the subjects adapted to an uneven surface while walking. We examined the association between the difference in parameter measurements between the two surface properties and walking activity. Walking activity significantly and positively correlated with the difference in paretic step length under the conditions of different surface properties in the poststroke patients and step width in the healthy controls. The strategy of increasing the paretic step length, but not step width, on an uneven surface may lead to a larger base of support, which maintains stability during gait on an uneven surface in poststroke patients, resulting in an increased walking activity. Therefore, in poststroke patients, an increase in paretic step length during gait on an uneven surface might be more essential for improving walking activity. (shrink)

Previous studies have shown that people often use heuristics in making inferences and that subjective memory experiences, such as recognition or familiarity of objects, can be valid cues for inferences. So far, many researchers have used the binary choice task in which two objects are presented as alternatives (e.g., “Which city has the larger population, city A or city B?”). However, objects can be presented not only as alternatives but also in a question (e.g., “Which country is city X in, (...) country A or country B?”). In such a situation, people can make inferences based on the relationship between the object in the question and each object given as an alternative. In the present study, we call this type of task a “relationships‐comparison task.” We modeled the three inference strategies that people could apply to solve it (familiarity‐matching [FM; a new heuristic we propose in this study], familiarity heuristic [FH], and knowledge‐based inference [KI]) to examine people's inference processes. Through Studies 1, 2, and 3, we found that (a) people tended to rely on heuristics, and that FM (inferences based on similarity in familiarity between objects) well explained participants' inference patterns; (b) FM could work as an ecologically rational strategy for the relationships–comparison task since it could effectively reflect environmental structures, and that the use of FM could be highly replicable and robust; and (c) people could sometimes use a decision strategy like FM, even in their daily lives (consumer behaviors). The nature of the relationships–comparison task and human cognitive processes is discussed. (shrink)

Some researchers on binary choice inference have argued that people make inferences based on simple heuristics, such as recognition, fluency, or familiarity. Others have argued that people make inferences based on available knowledge. To examine the boundary between heuristic and knowledge usage, we examine binary choice inference processes in terms of attribute substitution in heuristic use (Kahneman & Frederick, 2005). In this framework, it is predicted that people will rely on heuristic or knowledge‐based inference depending on the subjective difficulty of (...) the inference task. We conducted competitive tests of binary choice inference models representing simple heuristics (fluency and familiarity heuristics) and knowledge‐based inference models. We found that a simple heuristic model (especially a familiarity heuristic model) explained inference patterns for subjectively difficult inference tasks, and that a knowledge‐based inference model explained subjectively easy inference tasks. These results were consistent with the predictions of the attribute substitution framework. Issues on usage of simple heuristics and psychological processes are discussed. (shrink)

Inspired by Rick Grush's emulation theory, we reinterpreted a series of our neuroimaging experiments which were intended to examine the representations of complex movement, modality-specific imagery, and supramodal imagery. The emulation theory can explain motor and cognitive activities observed in cortical motor areas, through the speculation that caudal areas relate to motor-specific imagery and rostral areas embrace an emulator for amodal imagery.

The endangered species Tokudaia osimensis has the unique chromosome constitution of 2n = 25, with an XO/XO sex chromosome configuration (2n = 25; XO). There is urgency to preserve this species and to elucidate the regulator(s) that can discriminate the males and females arising from the indistinguishable sex chromosome constitution. However, it is not realistic to examine this rare animal species by sacrificing individuals. Recently, true naïve induced pluripotent stem cells were successfully generated from a female T. osimensis, and the (...) sexual plasticity of its germ cells was elucidated. This achievement constitutes the basis of an attractive research area, including embryonic fate determination, sex determination, and factor(s) that can replace the Y chromosome. In this essay, concrete strategies to conserve rare animal species and to reveal their specific characteristics using other compatible and abundant animals are proposed. -/- . (shrink)

Some people in Japan are still comfortable with the paternalistic role of doctors, but others wish that their own decisions would receive a greater amount of respect. A total of 747 students of universities and colleges and 114 parents of these students participated in a questionnaire survey. Most of the participants thought that autonomy should be respected in situations involving death with dignity and euthanasia, whereas it should not be respected in attempted suicide and involuntary admission of individuals with mental (...) illness. A cluster analysis revealed that the participants could be divided into the following groups: aid in dying advocates, complete libertarians, protectors of the mentally ill, complete paternalists, and questionables. The assertion of independence score of the Scale for Independent and Interdependent Construal of the Self showed a significant difference among the 5 clusters. These findings suggest that the traditional paternalistic relationship between doctor and patient is undergoing a gradual transformation in Japan. (shrink)

In this paper, we propose a novel medium for interactions based on an interpersonal psychological approach referred to as ‘naïve psychology’. We adopt the visual assessment of clustering tendency (VAT) to naïve psychology for the visual understanding of other people. The VAT algorithm produces a visual display that can be used to assess clustering tendencies in a set of persons (notions) by reconstructing a digital image representation of a square relational dissimilarity matrix for its set. This algorithm clearly represents two (...) types of imbalanced situations in naïve psychology: crisp and fuzzy. The visual image of a balanced or imbalance situation is useful for a deeper human understanding. (shrink)

The anchoring effect is a form of cognitive bias in which exposure to some piece of information affects its subsequent numerical estimation. Previous studies have discussed which stimuli, such as numbers or semantic priming stimuli, are most likely to induce anchoring effects. However, it has not been determined whether anchoring effects will occur when a number is presented alone or when the semantic priming stimuli have an equivalent dimension between a target and the stimuli without a number. We conducted five (...) experimental studies using stimuli to induce anchoring effects. We found that anchoring effects did not occur when a number was presented alone or when phrases to induce semantic priming were used without presenting a number. These results indicate that both numerical and semantic priming stimuli must be presented for anchoring effects to occur. Our findings represent a substantial contribution to the literature on anchoring effects by offering insights into how these effects are generated. (shrink)