In this paper, we propose a new service agent, called a steward robot, which provides inhabitants with accessible, convenient, and cost effective interfaces as an intermediate agent between the user and a smart home environment. To implement more subtle emotional reaction of the agent, we adopt a novel emotional cue, Sentiment Relation, and address a problem of modeling the intensity and transition of emotion words, while previous researches have mainly focused on the selection of discrete emotion words from psychological point of view. We also discuss some issues of the proposed emotional model applying a virtual scenario to our Intelligent Sweet Home.
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