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Degradation of Microstructured InN Films During Adsorption-induced Electrochromism
Yasushi Inoue,Osamu Takai 한국표면공학회 2010 한국표면공학회 학술발표회 초록집 Vol.2010 No.11
Indium-nitride films with isolated-nanocolumnar structure synthesized by glancing-angle reactive ion plating have been investigated for the degradation properties induced by cyclic electrochromic reaction. We found two types of degradation behavior due to abration and reduction of the indium-nitride layer.
Housing Estates as Experimental Fields of Social Research
Yasushi Sukenari 서울대학교 사회발전연구소 2016 Journal of Asian Sociology Vol.45 No.1
This paper discusses researchers’ relationships with their research object and its transformation in empirical sociology by examining “danchi” (housing estates) studies conducted by Japanese sociologists. The Japanese housing policy system was quickly established in the early 1950s, and the reinforced concrete housing complexes stimulated journalistic interest. Most influential researchers in postwar Japanese sociology launched into research on these newly constructed housing estates. One reason was that social surveys with standardized questionnaires to individual respondents were compatible with the new housing form. Danchi became experimental fields of social research. Some early researchers emphasized the sparsity of neighbor relationships in danchi and the surviving kinship across geographical boundaries. However, the image of danchi as pictured by sociologists transformed around 1960. Studies of residents’ associations showed that danchi communities were being formed through cooperative solutions found for residents’ common problems. Whether or not a housing estate was formed as a community depended on how the residents related to the space. This change was also reflected in the relationships between the researchers and the respondents in that the distance between them under the standardized attitude and opinion survey was lost. The change in the image of housing estates in the 1960s can be said to overlap with a turning point in social research.
Integrating Ant Colony Clustering Method to a Multi-Robot System Using Mobile Agents
Yasushi Kambayashi,Masataka Ugajin,Osamu Sato,Yasuhiro Tsujimura,Hidemi Yamachi,Munehiro Takimoto,Hisashi Yamamoto 대한산업공학회 2009 Industrial Engineeering & Management Systems Vol.8 No.3
This paper presents a framework for controlling mobile multiple robots connected by communication networks. This framework provides novel methods to control coordinated systems using mobile agents. The combination of the mobile agent and mobile multiple robots opens a new horizon of efficient use of mobile robot resources. Instead of physical movement of multiple robots, mobile software agents can migrate from one robot to another so that they can minimize energy consumption in aggregation. The imaginary application is making “carts,” such as found in large airports, intelligent. Travelers pick up carts at designated points but leave them arbitrary places. It is a considerable task to re-collect them. It is, therefore, desirable that intelligent carts (intelligent robots) draw themselves together automatically. Simple implementation may be making each cart has a designated assembly point, and when they are free, automatically return to those points. It is easy to implement, but some carts have to travel very long way back to their own assembly point, even though it is located close to some other assembly points. It consumes too much unnecessary energy so that the carts have to have expensive batteries. In order to ameliorate the situation, we employ mobile software agents to locate robots scattered in a field, e.g. an airport, and make them autonomously determine their moving behaviors by using a clustering algorithm based on the Ant Colony Optimization (ACO). ACO is the swarm intelligence-based methods, and a multi-agent system that exploit artificial stigmergy for the solution of combinatorial optimization problems. Preliminary experiments have provided a favorable result. In this paper, we focus on the implementation of the controlling mechanism of the multi-robots using the mobile agents.
Demulsification of O/W Emulsion and Subsequent Water Treatment Using Powder Adsorbent
Yasushi Takeuchi,Lee, Sung Sik,Mitsuhiro Nakamura 한국화학공학회 1989 NICE Vol.7 No.2
Demulsification of stable oil-in-water emulsion was studied using powder adsorbent. Among various adsorbents tested, activated carbon was found to be the most efficient regardless of the type of surfactants used. The more dose of activated carbon for the demulsification was required, the higher concentration of the surfactant as well as the larger amount of oil and the bigger size of the lipophilic and hydrophilic groups. Empirical equations were obtained to correlate the dose of activated carbon to the residual concentration of oil as a function of the initial concentration of surfactant.