A quantitative history of Japanese archaeology and natural science

This study examines the relationship between Japanese archaeology and natural science through a quantitative analysis of the two most authoritative archaeological journals and two other relevant journals in Japan. First, although previous studies have emphasized the impact of the Department of Anthropology at the University of Tokyo on the scientific aspects of Japanese archaeology, results of the present study suggest that its impact has been more limited than previously assumed. Second, while previous studies claimed that research funding by the Japanese government from the latter half of the 1970s was an important factor in developing the scientific aspects of Japanese archaeology, the present study shows a result inconsistent with the claim. Finally, although I admit that the previous studies have properly captured some aspects of the relationship between Japanese archaeology and science, I conclude that we should look at the broader array of contributors to the relationship between Japanese archaeology and natural science

Anomalous spatio-temporal chaos in a two-dimensional system of non-locally coupled oscillators

A two-dimensional system of non-locally coupled complex Ginzburg-Landau oscillators is investigated numerically for the first time. As already known for the one-dimensional case, the system exhibits anomalous spatio-temporal chaos characterized by power-law spatial correlations. In this chaotic regime, the amplitude difference between neighboring elements shows temporal noisy on-off intermittency. The system is also spatially intermittent in this regime, which is revealed by multi-scaling analysis; the amplitude field is multi-affine and the difference field is multi-fractal. Correspondingly, the probability distribution function of the measure defined for each field is strongly non-Gaussian, showing scale-dependent deviations in the tails due to intermittency.Comment: 9 pages, 14 figures, submitted to Chao

人間進化と二つの教育：人間進化の過程において教育はどの ような役割を果たしたか

This paper examines the theory of natural pedagogy theory especially by focusing on its explanation of overimitation

文化進化を研究するとはどういうことか

This paper reviews current situations of cultural evolutionary studies

ナチュラル・ペダゴジ一理論の行方

The paper is a critical comment on Okumura & Kanakogi (2019)