Shigeru Matsumoto

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This paper proposes a method that discovers trend rules from complex sequential data. The rules represent relationships among evaluation objects, keywords, and changes of numerical values related to the evaluation objects. The data is composed of numerical sequential data and text sequential data. The method extracts frequent patterns from transaction sets(More)
BACKGROUND Basic fibroblast growth factors (bFGFs) play a crucial role in wound healing by promoting fibroblast proliferation and neovascularization. However, drawback of bFGF is short half-life in free form. Gelatin has a capability of sustaining growth factors, which are gradually released while degradation. The purpose of this study is to see whether(More)
We propose some models to simulate human choice behavior to select facilities. In order to consider models for human behavior, we develop a web-based experimental system to collect the data of human choice behavior in facility selection. Using the developed system, human subjects act their facility selection according to the information such as the(More)
People use various information sources to resolve service quality uncertainty. This paper focuses on word-of-mouth communication among mothers. We conduct a survey of mothers with children in kindergarten to determine whether they use information from their friends on the choice of kindergartens and children's clinics. We identify the factors that influence(More)
The promotion of energy-efficient appliances is necessary to reduce the energetic and environmental burden of the household sector. However, many studies have reported that a typical consumer underestimates the benefits of energy-saving investment on the purchase of household electric appliances. To analyze this energy-efficiency gap problem, many scholars(More)
This paper proposes an improvement method for prediction of attractive evaluation objects based on trend rules. The trend rules represent relationships among evaluation objects, key phrases, and numerical changes related to the evaluation objects. The trend rules are inductively acquired from text sequential data and numerical sequential data. The method(More)