The atomic structure of a ‡ = 3, [110]/{112} grain boundary in a yttria-stabilized cubic zirconia bicrystal has been investigated by high-resolution transmission electron microscopy . It was found that the grain boundary migrated to form periodic facets, although the bicrystal was initially joined so as to have the symmetric boundary plane of {112}. The faceted boundary planes were indexed as {111}/{115}. The structure of the {111}/{115} grain boundary was composed of an alternate array of two types of structure unit: (...) {112}- and {111}-type structure units. HRTEM observations combined with lattice statics calculations verified that both crystals were relatively shifted by [110] along the rotation axis to form a stable grain-boundary structure. A weak-beam dark-field image revealed that there was a periodic array of dislocations along the grain boundary. The grain-boundary dislocations were considered to be introduced by the slight misorientation from the perfect ‡ = 3 orientation. The fact that the periodicity of the facets corresponded to that of the grain-boundary dislocations must indicate that the introduction of the grain-boundary dislocations is closely related to the periodicity of the facets. An atomic flipping model has been proposed for the facet growth from the initial ‡ = 3, {112} grain boundary. (shrink)

We propose a new Real-coded GA(RCGA) using the combination of two crossovers, UNDX-m and EDX. The search region of UNDX-m is biased to the inside area that the population of the RCGA covers. Because of this search bias, the GA using UNDX-m causes stagnation of its search if the cost function has a kind of structure, so called, a ridge structure or a multiple-peak structure. In order to overcome this stagnation, we propose a new crossover EDX, whose search is biased (...) toward extrapolative one. Experimental results show that RCGA with EDX can deal with both ridge-structure function whose dimension reaches more than hundreds and multiple-peak function whose optimum resides at the corner of the search area. (shrink)

江戸時代中期に開学した漢学塾懐徳堂。中井竹山・履軒兄弟が展開した懐徳堂儒学と朱子学との関係、思想史的意義を明らかにする。.

This paper presents the Real-coded Genetic Algorithms(RCGA) which can treat with high-dimensional ill-scaled structures, what is called, k -tablet structure. The k -tablet structure is the landscape that the scale of the fitness function is different between the k -dimensional subspace and the orthogonal (n-k) -dimensional subspace. The search speed of traditional RCGAs degrades when high-dimensional k -tablet structures are included in the landscape of fitness function. In this structure, offspring generated by crossovers is likely to spread wider region than (...) the region where the parental population covers. This phenomenon causes the stagnation of the search. To resolve this problem, we propose a new crossover LUNDX- m, which uses only m -dimensional latent variables. The effectiveness of the proposal method is tested with several benchmark functions including k -tablet structures and we show that our proposal method performs better than traditional crossovers especially when the dimensionality n is higher than 100. (shrink)

This paper presents a kernel density estimation method by means of real-coded crossovers. Functions of real-coded crossover operators are composed of probabilistic density estimation from parental populations and sampling from estimated models. Real-coded Genetic Algorithm (RCGA) does not explicitly estimate probabilistic distributions, however, probabilistic model estimation is implicitly included in algorithms of real-coded crossovers. Based on this understanding, we exploit the implicit estimation of probabilistic distribution of crossovers as a kernel density estimator. We also propose an application of crossover kernels (...) to Expectation-Maximization estimation (EM) of Gaussian mixtures. (shrink)

The paper explores the emergence and development of socially responsible investment (SRI) in Japan. SRI is a recent field in Japan. It is not clear which model it will follow: the European, American or its own model. Through the analysis of the historical roots of SRI, the key actors and motivations that have contributed to its diffusion, the paper provides explorative grounds to sketch the translation mechanisms of SRI in Japan and offers insight into its future path. Based on primary (...) and secondary sources of information, the paper shows that although SRI in Japan holds some similarities with the U.S. and especially with the European model, it remains unique. It highlights the importance of translation and re-interpretation in adopting a practice in a new context. SRI in Japan is still in a dynamic construction process. Although we expect it to develop further, it is difficult to depict its future shape and form. (shrink)

By the mid-19th century, an increasing number of Japan's political leaders and scholars realized that Japan had to adapt and incorporate some elements of Western-style industrialization into their own political and economic order as the necessary means to remain independent of Western imperialism. The Opium War in China, and later the Euro-American bombardments of the domain capitals in Choshu and Satsuma demonstrated that trying to defend the realm with only an increased emphasis on coastal defense would ultimately fail to keep (...) out the barbarians from the West. Sakuma Shozan, a samurai scholar from Matsushiro, proposed a dichotomous philosophy of 'Eastern ethics, Western science' as the means to strengthen Japan both internally and externally, and allow Japan to maintain its independence. In this paper, I argue that Sakuma's dichotomous approach can be interpreted within a Hegelian dialectical paradigm. After the traditional order of Japan (Eastern ethics as Idea/Thesis) came into contact with the industrializing order of the West (Western science as Nature/Anti-Thesis), Sakuma believed a new order would be created in Japan (Synthesis) that combined an increased knowledge on the Eastern ethics of Neo-Confucianism with the 'new' scientific knowledge of the West. (shrink)