In this review, we describe some of the central philosophical issues facing origins-of-life research and provide a targeted history of the developments that have led to the multidisciplinary field of origins-of-life studies. We outline these issues and developments to guide researchers and students from all fields. With respect to philosophy, we provide brief summaries of debates with respect to (1) definitions (or theories) of life, what life is and how research should be conducted in the absence of an accepted theory (...) of life, (2) the distinctions between synthetic, historical, and universal projects in origins-of-life studies, issues with strategies for inferring the origins of life, such as (3) the nature of the first living entities (the “bottom up” approach) and (4) how to infer the nature of the last universal common ancestor (the “top down” approach), and (5) the status of origins of life as a science. Each of these debates influences the others. Although there are clusters of researchers that agree on some answers to these issues, each of these debates is still open. With respect to history, we outline several independent paths that have led to some of the approaches now prevalent in origins-of-life studies. These include one path from early views of life through the scientific revolutions brought about by Linnaeus (von Linn.), Wöhler, Miller, and others. In this approach, new theories, tools, and evidence guide new thoughts about the nature of life and its origin.We also describe another family of paths motivated by a” circularity” approach to life, which is guided by such thinkers as Maturana & Varela, Gánti, Rosen, and others. These views echo ideas developed by Kant and Aristotle, though they do so using modern science in ways that produce exciting avenues of investigation. By exploring the history of these ideas, we can see how many of the issues that currently interest us have been guided by the contexts in which the ideas were developed. The disciplinary backgrounds of each of these scholars has influenced the questions they sought to answer, the experiments they envisioned, and the kinds of data they collected. We conclude by encouraging scientists and scholars in the humanities and social sciences to explore ways in which they can interact to provide a deeper understanding of the conceptual assumptions, structure, and history of origins-of-life research. This may be useful to help frame future research agendas and bring awareness to the multifaceted issues facing this challenging scientific question. (shrink)
The origins and consequences of warfare or largescale intergroup violence have been subject of long debate. Based on exhaustive surveys of skeletal remains for prehistoric hunter-gatherers and agriculturists in Japan, the present study examines levels of inferred violence and their implications for two different evolutionary models, i.e., parochial altruism model and subsistence model. The former assumes that frequent warfare played an important role in the evolution of altruism and the latter sees warfare as promoted by social changes induced by agriculture. (...) Our results are inconsistent with the parochial altruism model but consistent with the subsistence model, although the mortality values attributable to violence between hunter-gatherers and agriculturists were comparable. (shrink)
It has been commonly claimed that prehistoric warfare in Japan began in the Yayoi period. Population increases due to the introduction of agriculture from the Korean Peninsula to Japan resulted in the lack of land for cultivation and resources for the population, eventually triggering competition over land. This hypothesis has been supported by the demographic data inferred from historical changes in Kamekan, a burial system used especially in the Kyushu area in the Yayoi period. The present study aims to examine (...) the previous claim by using an expanded dataset of human skeletal remains and Kamekan. First, in order to quantify the intensity of warfare, we developed a database of injured individuals found in the middle phase of the Yayoi period in two large populations in the northern Kyushu area, the Fukuoka plain and the upperand middle-stream of the Homan River. Second, we collected Kamekan data from site reports published after 1990 and constructed a comprehensive database to infer the demography in these areas. Finally, we compared the frequency of injured individuals and the inferred demography. The results suggest that the frequency of injured individuals and the population increase tended to be higher at the upper- and middle-stream of the Homan River than on the Fukuoka plain. Different assumptions of the lifetime of each type of Kamekan can produce mixed results on the relationship between demography and the frequency of injured individuals. They were positively correlated under the traditional assumption of constant time intervals, while there was no correlation using time intervals based on carbon dating by the National Museum of Japanese History. Thus, our results are partially consistent with the previous claim that the population increase and the lack of land and resources due to the introduction of agriculture were causes of warfare in the northern Kyushu area in the middle phase of the Yayoi period. (shrink)
Violence and warfare in prehistory have been intensely discussed in various disciplines recently. Especially, some controversies are found on whether prehistoric hunter-gatherers had been already engaged in inter-group violence and warfare. Japanese archaeology has traditionally argued that warfare has begun in the Yayoi period with an introduction of full-fledged agriculture though people in the Jomon period, when subsistence system had been mainly hunting and gathering, had not been involved in inter-group violence and warfare. However, Lawrence Keeley, Samuel Bowles, Steven Pinker, (...) and others have recently focused on archaeological data of human skeletal remains, especially remains with some injures, arguing that prehistoric hunter-gatherers had already initiated inter-group violence and warfare. This paper aims to summarize and examine recent arguments that address the relationship between violence or warfare and human evolution based on archaeological data. In the first place, we summarize the claims of Keeley, Bowles, and Pinker that warfare had already been initiated and was commonplace among prehistoric hunter-gatherers, as well as the counter-argument of Ferguson that these original data are problematic. Secondly, we summarize the available data on human skeletal remains from the Mesolithic period in Europe (between 11,000 BC and 3,500 BC) and argue that these data support Ferguson’s argument. In particular, the available data suggests that even though inter-group violence and warfare was present during this period, it was very sporadic. Finally, we discuss the implications of this study and suggest future directions. (shrink)
The always vexed relationships between philosophy, theory, methodology, empirical work and their representations and legitimations have been thrown into chaos with the belated acknowledgement of the Anthropocene. Unsurprisingly, traditional Western thought may have been complicit, given its underlying anthropocentric assumptions and humanist commitments in education philosophy, theory and practice. The postcritical knowledge ecology developed here is applied to both a modest and responsible form of methodological inquiry in an ethnographic study of nature experience. Our contextualised experiment adds to the nascent (...) literature of an environmentally oriented education now demanded in the Anthropocene. (shrink)
A change of gaze behavior at a small mistake moment is a natural response that reveals our own mistakes and suggests an apology to others with whom we are working or interacting. In this paper we investigate how robot gaze behaviors at small mistake moments change the impressions of others. To prepare gaze behaviors for a robot, first, we identified by questionnaires how human gaze behaviors change in such situations and extracted three kinds: looking at the other, looking down, and (...) looking away. We prepared each gaze behavior, added a no-gaze behavior, and investigated how a robot’s gaze behavior at a small mistake moment changes the impressions of the interacting people in a simple cooperative task. Experiment results show that the ‘looking at the other’ gaze behavior outperforms the other gaze behaviors and indicates the degrees of perceived apologeticness and friendliness. Keywords: Communication robots; gaze; mistake; mitigation. (shrink)
When making decisions, people tend to overweigh the impact of losses compared to gains, a phenomenon known as loss aversion. A moderate amount of LA may be adaptive as it is necessary for protecting oneself from danger. However, excessive LA may leave people few opportunities and ultimately lead to suboptimal outcomes. Despite frequent reports of elevated LA in specific populations such as patients with depression, little is known about what psychological characteristics are associated with the tendency of LA. Based on (...) the neurobiological studies of LA, we hypothesized that positive psychological wellbeing may be negatively associated with people's tendency of LA. In the present study, we set out to test this hypothesis in a sample of young adults. We evaluated LA using a decision-making task in which subjects were asked to decide whether to accept or reject a series of coin-toss gambles. Our results revealed that individuals with more advanced personal growth as assessed by the Ryff's Psychological Well-being Inventory showed reduced LA. To our knowledge, this is the first report demonstrating an association between positive psychological wellbeing and LA. These findings suggest that personal growth might be employed as interventional targets for correcting excessive LA in vulnerable populations. (shrink)
he fourteen essays gathered together in this, the third volume of Frontiers of Japanese Philosophy, represent one more step in ongoing efforts to bring the concerns of twentieth-century Japanese philosophy into closer contact with philosophical traditions around the world. As its title indicates, the aims are twofold: to reflect critically on the work of leading figures in the modern academic philosophy of Japan and to straddle the borderlands where they touch on the work of their counterparts in the West. -/- (...) A first group of essays deals with the modern Japanese philosophers Kuki Shūzō, Nishida Kitarō, Nishitani Keiji, and Takizawa Katsumi. These are followed by three essays on comparisons with classical Western thought and three with contemporary philosophy. The final three contributions offer reflections on the role of Japanese philosophy today. (shrink)
Japanese English learners have difficulty speaking Double Object than Prepositional Object structures which neural underpinning is unknown. In speaking, syntactic and phonological processing follow semantic encoding, conversion of non-verbal mental representation into a structure suitable for expression. To test whether DO difficulty lies in linguistic or prelinguistic process, we conducted functional magnetic resonance imaging. Thirty participants described cartoons using DO or PO, or simply named them. Greater reaction times and error rates indicated DO difficulty. DO compared with PO showed parieto-frontal (...) activation including left inferior frontal gyrus, reflecting linguistic process. Psychological priming in PO produced immediately after DO and vice versa compared to after control, indicated shared process between PO and DO. Cross-structural neural repetition suppression was observed in occipito-parietal regions, overlapping the linguistic system in pre-SMA. Thus DO and PO share prelinguistic process, whereas linguistic process imposes overload in DO. (shrink)
Short-term motor practice leads to plasticity in the primary motor cortex. The purpose of this study is to investigate the factors that determine the increase in corticospinal tract excitability after motor practice, with special focus on two factors; “the level of muscle activity” and “the presence/absence of a goal of keeping the activity level constant.” Fifteen healthy subjects performed four types of rapid thumb adduction in separate sessions. In the “comfortable task” and “forceful task”, the subjects adducted their thumb using (...) comfortable and strong forces. In the “comfortable with a goal task” and “forceful with a goal task”, subjects controlled the muscle activity at the same level as in the C and F, respectively, by adjusting the peak electromyographic amplitude within the target ranges. Paired associative stimulation, which combines peripheral nerve stimulation and transcranial magnetic stimulation, with an inter-stimulus interval of 25 ms was also done. Before and after the motor tasks and PAS25, TMS was applied to the M1. None of the four tasks showed any temporary changes in behavior, meaning no learning occurred. Motor-evoked potential amplitude increased only after the FG and it exhibited a positive correlation with the MEP increase after PAS25, suggesting that FG and PAS25 share at least similar plasticity mechanisms in the M1. Resting motor threshold decreased only after FG, suggesting that FG would also be associated with the membrane depolarization of M1 neurons. These results suggest task-dependent plasticity from the synergistic effect of forceful muscle activity and of setting a goal of keeping the activity level constant. (shrink)
RESUMO Tendo em vista a importância que o conceito de modelização, advindo da Cibernética, possui para o pensamento de Iuri Lotman, este artigo visa discutir a maneira pela qual o raciocínio inerente ao procedimento modelizador se encontra presente numa das suas principais formulações, relativa à “invariante intelectual”, que elucida a ação exercida pelo mecanismo inteligente da cultura, capaz de assegurar a sua perenidade e, ao mesmo tempo, incitar a criação de novos textos. Para proceder a essa discussão, primeiramente serão retomados (...) os fundamentos do processo de modelização e sua relação com o fazer científico, com o intuito de indicar o que vem a ser o “modelo” e o tipo de inteligibilidade que ele é capaz de produzir. Ao explorar a centralidade que o procedimento modelizador possui nas formulações de Lotman, espera-se igualmente elucidar de que modo, para o autor, é possível construir uma compreensão semiótica muito singular acerca da linguagem e da cultura. ABSTRACT Considering the importance of the modelling concept from Cybernetics to Yuri Lotman’s thinking, this article aims to discuss how the inherent reasoning for the modeling procedure is found in one of its main formulations, related to “intellectual invariant,” which elucidates the action on the intelligent mechanism of the culture, capable of ensuring its perenniality while inciting the creation of new texts. In order to continue this discussion, the fundamentals of the modelling process and its relationship with the scientific doing will be firstly resumed to indicate the “model” and the type of intelligibility they are capable of producing. When exploring the centrality that the modeler procedure has in Lotman’s formulation, the author is equally expected to elucidate how it is possible to build a very singular semiotic understanding of language and culture. (shrink)
Paired associative stimulation at the spinal cord has been shown to increase muscle force and dexterity by strengthening the corticomuscular connection, through spike timing dependent plasticity. Typically, transcranial magnetic stimulation and transcutaneous peripheral nerve electrical stimulation are often used in spinal PAS. PNS targets superficial nerve branches, by which the number of applicable muscles is limited. Alternatively, a muscle can be activated by positioning the stimulation electrode on the “motor point”, which is the most sensitive location of a muscle to (...) electrical stimulation. Although this can increase the number of applicable muscles for spinal PAS, nobody has tested whether MPS can be used for the spinal PAS to date. Here we investigated the feasibility of using MPS instead of PNS for spinal PAS. Ten healthy male individuals received spinal PAS on two separate days with different stimulation timings expected to induce facilitation of corticospinal excitability or no effect on the soleus. The motor evoked potentials response curve in the soleus was measured prior to the spinal PAS, immediately after and at 10, 20, 30 min post-intervention as a measure of corticospinal excitability. The post-intervention MEP response curve areas were larger in the REAL condition than the CONTROL conditions. Further, the post-intervention MEP response curve areas were significantly larger than pre-intervention in the REAL condition but not in the CONTROL condition. We conclude that MPS can facilitate corticospinal excitability through spinal PAS. (shrink)
