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Kagoshima-shi, Japan

Daiichi Institute of Technology is a private university in Kirishima, Kagoshima, Japan. The predecessor of the school was founded in 1955, and eventually it adopted the present name in 1985. Wikipedia.

Ooe K.,Daiichi Institute of Technology
Procedia Engineering | Year: 2012

We developed a novel artificial larynx with on/off and pitch control for Speech Production Substitutes (SPSs) users, particulary an electrolarynx control based on the myoelectric signal of the laryngeal muscles located near the body surface (such as the sternohyoideus). For patients who have lost their vocal cords or its function for vocalization, various SPSs have been developed and widely used. However, these substitutes have the limitation -that they cannot match with the vocalization of healthy human larynx. The measurement of the surface myoelectric potential was performed and we studied its efficiency for voice on/off and pitch frequency control. The results show that there is a quadratic relation between the measured myoelectric potential and the pitch frequency. Using this relation, it was possible to control the pitch frequency of the generated sound in three levels with 86.7% of accuracy (condition of linear relationship lead 68.9%). This confirms that the surface myoelectric potential was a suitable control signal for the artificial larynx. In this paper, the capability of novel controllable artificial larynx controlled by myoelectric signal of sternohyoideus was described. © 2012 The Authors. Published by Elsevier Ltd. Source

Linlin Z.,Jinan Vocational College | Tanaka K.,Daiichi Institute of Technology
Advanced Materials Letters | Year: 2014

This study investigated the dissolution kinetics of silver nanoparticles in presence of natural organic matter. Silver nanoparticles were synthesized using chemical reduction method. Particle size and surface charges of the synthesized silver nanoparticles were characterized using a zetasizer. ICP-MS combined with ultrafiltration technology was used to quantify the silver nanoparticle dissolution in presence of natural organic matters. The obtained results suggested that the dissolution rate of silver nanoparticles decreases with increasing natural organic matter content. Our study provides important guidance in elucidating the transport and fate of silver nanoparticles in natural water conditions. © 2014 VBRI press. Source

Furuta T.,Daiichi Institute of Technology | Nakao M.,Yokohama National University
WCTE 2014 - World Conference on Timber Engineering, Proceedings | Year: 2014

A new type brace fastener which fastens the end of a diagonal wood brace to the end of column is developed for Post and Beam construction wooden houses. Since the brace fastener contains high damping rubber, it absorbs a displacement between the end of a wood brace and a column, damage of wood around wood screws is able to be prevented. On shake table test of a wood frame with a wood brace fastened by the new brace fasteners, the new brace fastener showed higher seismic performance in comparison with normal brace fastener especially under large earthquake motion. Moreover, by means of earthquake response analysis of two-storied wooden house, it was confirmed that the new brace fastener showed good seismic performance. Source

Tanada Y.,Daiichi Institute of Technology | Sato K.,Kagoshima University
IWSDA 2013 - 6th International Workshop on Signal Design and Its Applications in Communications | Year: 2013

Huffman sequences with long length are generated for the application to high attenuation sonar or radar. A general expression of Huffman sequence is given by polynomial expansion of its spectrum. For long length, the fist-order approximate sequence is given by a DFT expression and the estimate absolute value of the sequence is represented by a Gaussian shape. Long Huffman sequences are constructed from even functional quadratic residues. The calculated sequences with length up to 15914 show their estimate absolute values of Gaussian shape with peak value 2, although the maximum absolute value is about 6 when the length is 6030. The maximum absolute values are expected to be decreased by parameter selections. © 2013 IEEE. Source

Takahashi M.,Yamanashi University | Nanba R.,Daiichi Institute of Technology
Proceedings of the SICE Annual Conference | Year: 2014

This paper proposes a method of Fault Tree Analysis (FTA) for control program. If malfunction of control program occurs, industrial product into which program is installed may behave inadequately. As a result, it causes some faults for industrial products, but it also causes damages to the users and environments. This paper proposes following method; prepare FT templates corresponding to the program structure, extract characteristics of control program, and develop FT according to the predefined rules. As a result, we can develop FT mechanically. The proposed FTA method is applied to an analysis of 'spin too fast' fault for satellite, and FT is developed. The result of FT is adequate. This result shows that safety of control program installed into industrial products are improved by applying the proposed FTA method for control program. © 2014 SICE. Source

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