There are many Multi-Agent Simulation systems that are intending easy to use. When we will evaluate modeling usability now, it is difficult to evaluate quantitatively from operating time, because there are variability in tasks caused by thinking time on construction of models. So we designed to evaluate usability from “the total time”, “the thinking time” and “the operating time”.
  In this study we calculate “the remain time” by subtract operating time from total task executing time. The remain time is including the meta thinking time, that is, decision of the method and cognition of the task goal. And we compared the total time, operating time and the remain time, with a satisfaction rate of modeling.
  We applied this method to 3 simulation systems to evaluate quantitative usability. Then there confirmed that a significant difference between 3 systems with the total time, however, there are only non significant differences between 3 systems with the remain time. This study shows that there is correlation between the remain time and the satisfaction rate. And estimated when using the remain time, It can be possible to evaluate quantitatively about tasks with much thinking time.

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  An ad-hoc cellular system, which is a combination of a cellular system and direct communication, has been proposed to utilize limited frequency resources. In this system, a mobile terminal is directly connected to another terminal if these terminals are close to each other. Otherwise, the terminals communicate with each other via a base station of the cellular system. Performance analysis of the ad-hoc cellular system has been done in various situations. In this paper, we consider a mobility model where terminals go back and forth between a central point and their home points in the cell. This model assumes mobility of people between a shelter and their homes in a disaster situation. In this paper, we analyze teletraffic characteristics of an ad-hoc cellular system considering this mobility model. We analyze teletraffic characteristics of this system consisting of one cell assuming that terminals tend to gather a certain point with high probability by theoretical methods and computer simulation. Throughout analysis, we showed that direct communication works efficiently in this model, where terminals tend to gather a certain point. Furthermore, we showed how teletraffic characteristics are affected by the positon of the certain point and distribution of terminals.

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  In this study, uncoupled analysis has been conducted to evaluate the impact resistance of multi-layer coatings. At first, high strain-rate simulation was conducted by ANSYS. Then the results of stress and strain histories were input in the damage analysis program which integrates the elasto-viscoplastic damage constitutive equation based on continuum damage mechanics. Both results of tensile fracture analysis and drop impact analysis has almost agreed well with the corresponding experimental results. The uncoupled analysis method for dynamic damage mechanics problems can be expected to be used as an efficient computational tool for the evaluation and the design of multi-layer coatings.

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