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Speech is structured acoustic signals which form a message featuring the speaker's language, speaking style, and also underlying emotion. These features affect the information passed through speech. Automated speech emotion recognition is a field long studied, but it has not yet found a quite reliable approach. This paper explores two ways to improve automated recognition. First, new sets or combinations...
Conventional visual secret sharing (VSS) schemes generate noise-like random pixels on shares to hide secret images. However, these schemes suffer from two problems, one related to security and one related to management. First, the noise-like shares arouse suspicion, which leads to security problems for participants who are involved in a VSS scheme. Second, participants cannot visually identify each...
An effect of applied electric potential and physico-chemical parameters on a droplet diameter has been analyzed numerically. Smaller droplets can be ejected from a nozzle by applying electrostatic potential between the nozzle and liquids. Although the droplets have been formed until the critical value of the electric potential, unstable liquid jets with multiple satellite droplets have been observed...
This paper focuses on how to improve the characteristics of multi-walled carbon nanotube (MWCNT) sheet transparent, conductive films (TCFs), such as their sheet resistance (Rs) and optical transparency (T), for TCF electrodes. In this work, MWCNT sheets under went an acid treatment in HNO3 to reduce the Rs of the MWCNT sheet. The Rs of the MWCNT sheets is largely dependent on the immersion time in...
In a problem of target capturing for multiple robots, it is an issue that the target is fixed or movable. When the target is fixed, the problem is solved by enclosing the target. However, it is useless if the target moves. We have investigated the restrictive velocity of the target that the robots can maintain the enclosing formation. The velocity of the target is supposed to be constant and smaller...
The strain distribution and electrical characteristics of heterojunction with intrinsic thin layer (HIT) solar cell with mechanical bending was studied in this work. The efficiency decreased with mechanical strain increasing due to bandgap narrowing. The advantage of wafer thin down for HIT is not only decreasing electron-hole recombination, but also reducing variation of performance with mechanical...
In the dome display environment, it is known that three-dimensional scene can be represented utilizing the effects of geometrical perspective and motion parallax effectively without using the stereo glasses. However, the creation of contents for the dome display is not easy, because it needs omni-directional images. In this study, we propose the layer based method to create the dome contents easily...
Psychologist David Ausubel (1968) has developed a theory of meaningful learning in which skills have been developed for structuring courses and presentations to increase the mental activities of the students. How can this traditional model of teaching “Advance Organizer” be embedded in the present educational settings in which the proliferation of online course designs has changed the learning and...
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