This study has investigated a technique that replicates waveform fluctuations of speech signals by combining partials of limited Q, a parameter defined as the ratio dividing a center frequency of a ...resonance by its bandwidth. This paper shows that the proposed technique may potentially generate amplitude and period fluctuations of 1/f-like frequency characteristics, which are considered to be one of the indices reflecting the naturalness of human speech.
The music game is one of the popular game styles where a player is typically requested to take specific actions at specific moments corresponding to the prominent acoustic epoch in the music playing ...in the background. Stage data for such games record a sequence of actions the player has to take. Creating such data is a difficult task that requires skilled artists. It is also time-consuming because such games require multiple sequences with different difficulty levels. We propose a method for generating sparse stage data with lower difficulty levels by expressing the position of the target by a certain representation of rhythm.
This study has developed a system that performs data communications using high frequency bands of sound signals. Unlike radio communication systems using advanced wireless devices, it only requires ...the legacy devices such as microphones and speakers employed in ordinary telephony communication systems. In this study, we have investigated the possibility of a machine learning approach to improve the recognition accuracy identifying binary symbols exchanged through sound media. This paper describes some experimental results evaluating the performance of our proposed technique employing a neural network as its classifier of binary symbols. The experimental results indicate that the proposed technique may have a certain appropriateness for designing an optimal classifier for the symbol identification task.
We have proposed a novel concept of a digital watermarking technique for music data that focuses on the use of sound synthesis and sound effect techniques. This paper describes the details of our ...proposed technique that employs the distortion effect, one of the most common sound effects frequently utilized especially for guitar and bass instruments. This paper describes the experimental results of evaluating the resistance of the proposed technique against some basic malicious attacks utilizing MP3 coding, tempo alteration, pitch alteration, and high-pass filtering. It is demonstrated that the proposed technique potentially has appropriate resistance against such attacks except for the high-pass filtering attack. A technique for increasing the resistance against the high-pass filtering attack is also supplementarily discussed.
Platelet-rich fibrin (PRF) is a second-generation platelet concentrate. PRF has been the subject of both basic and clinical studies and has seen clinical application throughout the world with a focus ...on its tissue regeneration effect; however, few reports have focused on PRF's postoperative pain-relieving effect. Therefore, we prospectively examined the postoperative pain-relieving effect of PRF following tooth extraction.
Among the patients who visited the Oral and Maxillofacial Surgery Department at the our hospital from April 2016 to March 2018, there were 14 male and 18 female subjects who met the inclusion criteria.
There were no significant differences in the average Visual Analog Scale (VAS) value between the PRF group and control group at the day of tooth extraction and day 2 after surgery, but at days 3 and 4 after surgery, the PRF group showed a significantly lower VAS value than the control group.
The present study proved the short-term efficacy of PRF immediately after surgery (within 1 week after surgery) for relieving pain.
To investigate the dependence of biocompatibility of carbon materials on crystal structure with the aim of developing biomedical applications, single-(SW) and multi-walled (MW) carbon nanotubes ...(CNTs) were employed as scaffolds for cell culture and compared with graphite (GP). SaOS2 cells were used to investigate the properties and response of osteoblast-like cells. Polycarbonate membranes (PC) coated with CNTs by vacuum filtration formed a meshwork nanostructure. Cells grown on CNTs greatly extended in all directions. In terms of cell proliferation, alkaline phosphatase (ALP) activity, and protein adsorption on the substrates, CNTs showed better results than PC and GP. SW showed the best cell proliferation and total ALP. These favorable results might be attributed to the structure of CNTs and the affinity of CNTs toward proteins, thereby suggesting that CNTs could be potential scaffold materials for cell culture.
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