Faculty of Science and Technology
基本情報
研究キーワード
1研究分野
1経歴
8-
2022年9月 - 現在
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2019年4月 - 現在
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2022年4月 - 2023年3月
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2013年4月 - 2022年3月
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2013年4月 - 2022年3月
受賞
25論文
52-
Journal of Alloys and Compounds 1002 174667-174667 2024年10月 査読有り
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Arts & Communication 2(2) 1782-1782 2024年5月6日 査読有りDespite the existing research on flow in music education, there remains a lack of researches in understanding children’s flow experiences in the context of playing musical instrument, electronic technological instruments, and other traditional instruments. This study investigates the observable flow experience among young children during their interactions with musical instrument digital interface instruments, violins, and bell-like instruments. The research employed a case study approach, with 20 children aged two to nine (11 females and nine males) participating in the study. In the study, we, as practitioner-researchers, offered workshops for children to experience a variety of traditional and non-traditional musical instruments. Throughout the study, researchers collected 89 video clips for analysis, using four cameras operated by four assistants who were trained to capture children’s flow in a musical context. These monthly sessions, each lasting an average of 60 min, began with the first session dedicated to capturing the very first encounter of children with various musical devices, instruments, and materials. Custodero’s Flow Indicators in Musical Activities captured children’s flow experiences during workshops. The findings included interpretations of the children’s flow experiences as they explored different devices, instruments, and materials, with a particular emphasis on accessibility and developmental considerations within the social context of children’s musical flow.
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Materials Transactions 64(8) 1784-1790 2023年7月 査読有り筆頭著者責任著者Ti6Al7Nb alloys have been widely used in the medical field, particularly in artificial hip joints, spinal fixators, and dental implants, owing to their light weight, low toxicity, and superior corrosion resistance. Grain refinement through a severe plastic deformation process under high pressure, such as high-pressure torsion (HPT) or high-pressure sliding, is widely employed for strengthening metallic materials. This overview presents the recent advances in the effect of HPT on the mechanical properties of the Ti6Al7Nb alloy. This alloy was grain-refined through HPT under applied pressures of 2 and 6 GPa, and the results revealed that the alloy subjected to HPT processing at 6 GPa exhibited a higher strength. To inhibit the decrease in the total elongation of the alloy, the number of revolutions in the HPT process was set to moderate. The tensile properties achieved after HPT processing were found to be dependent on the initial microstructure before the HPT treatment. Furthermore, an alloy with a bimodal equiaxed and acicular structure was subjected to grain refinement via the HPT process. The results revealed that fragmentation of the acicular structure during HPT further increased the strength. Moreover, the HPT-processed Ti6Al7Nb alloy exhibited superplasticity. It was thus confirmed that grain refinement by HPT is an effective method for strengthening the Ti6Al7Nb alloy, which is advantageous for medical applications.
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COATINGS 13(3) 627 2023年3月 査読有りA customized micro-arc oxidation (MAO) treatment technique was developed to obtain antibacterial properties with no toxicity on Ti surfaces. A two-step MAO treatment was used to fabricate a specimen containing both Ag and Zn in its surface oxide layer, and the optimal incorporation conditions were determined. Surface characterization by EDS was performed followed by the antibacterial properties against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) and osteogenic cell compatibility evaluations. In addition, metal ion release tests were performed to evaluate the contents of Ag and Zn and the ion release behavior in order to simulate practical usage. MAO-treated specimens prepared using proper concentrations of Ag and Zn (0.5Ag-5Zn: 0.5 mM AgNO3 and 5.0 mM ZnCl, respectively) exhibited excellent antibacterial properties against E. coli and S. aureus and no toxicity to MC3T3-E1 in antibacterial and cytotoxic evaluations, respectively. The antibacterial property of 0.5Ag-5Zn against S. aureus was sustained even after two months of immersion in physiological saline, simulating the in vivo environment.
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MATERIALS TRANSACTIONS 64(1) 131-137 2023年1月 査読有りIn orthopedics, occasionally, different types of metals are used in applications in which they are in contact with each other. However, few studies have electrochemically investigated the galvanic corrosion of orthopedic implants formed of different metals. In this study, galvanic corrosion of Ti-6Al-4V ELI alloy, Co-Cr-Mo alloy, and 316L type stainless steel, which are used in orthopedics, and a newly developed Zr-1Mo alloy as a low-magnetic susceptibility material was evaluated in saline. Coupling of the Ti-6Al-4V ELI and Co-Cr-Mo alloys did not exhibit localized corrosion and maintained highly stable passive films. Coupling of the 316L type stainless steel and Co-Cr-Mo alloy, temporary localized corrosion occurred. Similarly, coupling of the Zr-1Mo and Co-Cr-Mo alloys, temporary localized corrosion occurred. However, both of 316L type stainless steel and Zr-1Mo alloy were finally repassivated spontaneously with the immersion time. The degree of the localized corrosion of the Zr-1Mo alloy was smaller than that of 316L type stainless steel. No galvanic current was observed when the Ti-6Al-4V ELI and Co-Cr-Mo alloys were coupled. A slight galvanic current flowed when 316L type stainless steel or the Zr-1Mo alloy was coupled with the other alloys; however, the galvanic current with the Zr-1Mo alloy coupling recovered to zero after a certain period owing to repassivation. No metal ions were detected from the couplings with Zr-1Mo
MISC
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Materia Japan 59(12) 679-684 2020年12月1日 査読有り
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Transactions of the Annual Meeting of the Society for Biomaterials and the Annual International Biomaterials Symposium 40 355 2019年Introduction: The next generation surface modification on medical and dental implants is coatings of tissue or stem cells on them.1 To promote cellular attachment and formation of tissues on materials, the control of patterned surface topography is necessary, as the surface topography of a material governs its biocompatibility. For example, in the case of titanium (Ti), nanometer scale topographical features influence cell spreading and micrometer scale topography promotes stem cell differentiation in vitro.2-4 To clarify the role of patterned nano topographies on the biocompatibility and osteoconductivity of metal implant, we investigated the adhesion and calcification of mouse preosteoblast (MC3T3-E1) to Ti surfaces with three surface patterned nano-ripples topography fabricated by single-shot femtosecond laser irradiation.
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日本歯科理工学会誌 34(2) 121-121 2015年3月25日Micro-arc oxidation (MAO) was performed on a titanium (Ti) to achieve both hard-tissue compatibility and antibacterial property. The surface oxide layer formed on Ti by MAO treatment in a mixture of calcium glycerophosphate, calcium acetate, and silver nitrate was evaluated by surface analyses, cell and microbial testing. Small amount of Ag was incorporated into the porous oxide layer by MAO treatment. Ag-ion release was confirmed during immersion in a physiological saline. The released Ag ions completely inhibit the proliferation of E. coli while the proliferation and mineralization activity of MC3T3-E1 cells was not affected when MAO treatment condition was optimized.
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生体材料工学研究所年報 49 3-6 2015年
講演・口頭発表等
22-
Pacific Early Childhood Education Research Association (PECERA) Annual Conference 2024 2024年8月4日
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International Workshop on Superfunctional Energy/Nano Materials (SENM2023) 2023年8月31日
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Asia-Pacific Symposium for Music Education Research 2023 APSMER Seoul
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The 7th International Symposium on Biomedical Engineering (ISBE2022) 2022年11月25日
担当経験のある科目(授業)
7共同研究・競争的資金等の研究課題
9-
文部科学省/日本学術振興会 科学研究費助成事業 若手研究 2021年4月 - 2025年3月
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生体医歯工学共同研究拠点 2022年5月 - 2023年3月
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文部科学省/日本学術振興会 2020年4月 - 2023年3月
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生体医歯工学共同研究拠点 2020年5月 - 2022年3月
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文部科学省/日本学術振興会 2019年 - 2022年
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