Previous research has compared still images employing the actor’s perspective to those employing the observer’s perspective and found that the former increases service evaluations if the consumers are promotion-focused, whereas the latter increases service evaluations if the consumers are prevention-focused. The research compares three kinds of vlogs, i.e., vlogs employing the actor’s perspective, vlogs employing the observer’s perspective without the actor’s face, and vlogs employing the observer’s perspective with the actor’s face. The results show that the highest service evaluations are induced by the actor’s perspective in case of promotion-focused consumers, whereas they are induced by the observer’s perspective without the actor’s face in case of prevention-focused consumers.

Development of recycling method at cemented carbide scraps was researched. Some properties of recycled cemented carbides were investigated. Recycled WC fine powder suffered the surface oxidation. Therefore it was necessary to be done by reduction treatment at 1073K-3.6ks under hydrogen atmosphere. When sintering condition at 1673K-3.6ks was treated under vacuum condition, it gained the deflective strength of about 90%, and gained hardness and sintering density about same value compared with commercial alloys. As a result, it was able to recycle only by 7 processes.