Recently in the horror genre of films, mockumentary staging techniques have often been utilized. A mockumentary is a staging technique by which the audience is led to believe that a created work of fiction is actually a documentary. In this paper, taking societal backgrounds into account, we used subjective evaluation experiments to determine why mockumentary staging techniques are so frequently utilized in today's film industry, particularly in the horror genre. Furthermore, in our subjective evaluation experiments, we clarified the significance of the POV (Point-of-View) aspect - a frequently used staging technique when presenting imagery in the mockumentary genre (hereafter mockumentary) - and also the significance of inserting the film's premise at the storyline's beginning. From this, we discussed a depiction of frightening imagery through mockumentary staging techniques.

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Twitter is one of the most popular micro blog services in the world. It has a large number of users and posts. One of the reasons why so many people uses Twitter is that they can use it easily and can obtain many kinds of information in real time. On Twitter, information is delivered via following networks. The following networks on Twitter are static and have to be specified manually by each user, so a user cannot share information that he/she wants if that was out of his/her following networks. On the other hand, it often happens that users want information about an event such as festival or sport game when they are attending it. In this paper, we propose a method for composing ad-hoc following networks automatically among users who are attending the same event for sharing information about it.

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Many contrivances to give a button image solidity have been used in an interface design in order to enhance convenience for users by evoking operation to associate the real one. The previous study shows that it is possible to perceive the three dimensional space from the two dimensional image with the luminance change via linear gradation. As with the spread of touch-panel terminals in recent years, many studies about the interface design for touch-panel terminals have been conducted, however less studies about the brightness value of the linear gradation have been conducted. We conducted an experiment about the luminance value of the linear gradation in gray scale, focusing on a button solidity in a touch-panel terminal in this study. As a result, strong correlation was observed between the highlight and the shadow of the gradation, the average brightness difference between the two was 63.22% and the true value was between 62.20% and 64.23%.

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