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Aerodynamic levitator for large-sized glassy material production.
Yoda, Shinichi,Cho, Won-Seung,Imai, Ryoji American Institute of Physics 2015 Review of scientific instruments Vol.86 No.9
<P>Containerless aerodynamic levitation processing is a unique technology for the fabrication of bulk non-crystalline materials. Using conventional aerodynamic levitation, a high reflective index (RI) material (BaTi2O5 and LaO3/2-TiO2-ZrO2 system) was developed with a RI greater than approximately 2.2, which is similar to that of diamond. However, the glass size was small, approximately 3 mm in diameter. Therefore, it is essential to produce large sized materials for future optical materials applications, such as camera lenses. In this study, a new aerodynamic levitator was designed to produce non-crystalline materials with diameters larger than 6 mm. The concept of this new levitator was to set up a reduced pressure at the top of the molten samples without generating turbulent flow. A numerical simulation was also performed to verify the concept.</P>
Good Scalability of Study of Spin Torque Transfer MRAMs with Perpendicular Magnetization MTJs
H. Yoda,T. Kishi,T. Nagase,M. Yoshikawa,E. Kitagawa,T. Daibou,K. Nishiyama,T. Kai,N. Shimomura,M. Nakayama,M. Amano,H. Aikawa,S. Takahashi,S. Ikegawa,M. Nagamine,J. Ozeki,S. Yuasa,Y. Nakatani,M. Oogan 한국자기학회 2008 한국자기학회 학술연구발표회 논문개요집 Vol.- No.-
Masticatory muscle tendon-aponeurosis hyperplasia accompanied by limited mouth opening
Tetsuya Yoda 대한구강악안면외과학회 2019 대한구강악안면외과학회지 Vol.45 No.4
Patients with masticatory muscle tendon-aponeurosis hyperplasia (MMTAH) experience limited mouth opening due to restricted muscle extension. Hyperplastic aponeurosis and tendons lead to the restriction of muscle extension. The criteria for the diagnosis of MMTAH are limited mouth opening that progresses very slowly from adolescence, intraoral palpation reveals a hard cord-like structure along the overhang of the anterior border of the masseter muscle on maximum mouth opening, and a square mandible. Conservative treatment, including pharmacotherapy, occlusal splint and physical therapy are ineffective. The standard therapy is surgical treatment, such as anterior partial aponeurectomy of the masseter muscle and coronoidectomy. The long-term results are very satisfying.
H. Yoda,Y. Ohsawa,Y. Kato,N. Shimomura,M. Shimizu,K. Koi,S. Shirotori,T. Inokuchi,H. Sugiyama,S. Oikawa,B. Altansargai,M. Ishikawa,A. Kurobe 한국자기학회 2019 Journal of Magnetics Vol.24 No.1
We designed a voltage-control spintronics memory unit-cell, VoCSM, with high write-efficiency to prove a potential to reduce writing energy per bit. By optimizing a self-aligned structure, the cell has the critical switching current (Icsw) smaller than 50 μA at 20 nsec. for designed MTJ size of about 50 × 150 ㎚². The value is much smaller than that for mature STT-MRAM with the similar dimension. VoCSM also was proved to have unlimited endurance. Finally, with an empirical equation of Icsw further reduction of Icsw is estimated to clarify that VoCSM has a potential to reduce Icsw down to several μA.
A Limitation of Multicultural Education from Simone Weil’s Understanding of Justice
Kazuaki Yoda 숙명여자대학교 아시아여성연구원 2017 OMNES: The Journal of Multicultural Society Vol.7 No.2
This paper brings to light a critical limitation of multicultural education finding insights in Simone Weil’s understanding of justice. Weil distinguishes justice as rights from justice as compassion. While today’s discourse of justice mainly concerns the former, she claims justice in the latter sense is crucial. Weil points that the fight for justice tends to fall into a competition for rights and power, and the competitive attitude not only has us forget compassion but it also hinders our compassionate response to others and hence genuine justice. The dimensions of multicultural education such as equity, equality, and cultural representation, are generally debated with the language of rights, which drives us to concern power and privilege, degrades what is fought for, and degenerates the fight itself. It thus forecloses the possibility of justice. For Weil justice originates in the recognition of the common human condition among people in different cultures and circumstances rather than the recognition of cultural identity, emphasizing the value of difference and diversity, which is usually multiculturalism’s main focus.