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High-strength Soft Magnetic Composite with Self-lubricating Resin
Miyahara Masahisa,Tanaka Yoshihiro,Igarashi Kazunori,Morimoto Koichiro 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Improvement of the strength is one of the most important subjects on soft magnetic composite (SMC) to increase the applica ble items. In this study, lubricants for inner lubricating SMC, which can be produced in lower cost than die wall-lubricatin g SMC, varied to investigate their effect on the strength. The newly developed SMC with self-lubricating resin shows high st rength equivalent to that of SMC obtained by die wall lubrication.
Shin Miyahara,Nobuo Furukawa 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
We investigate the electro-active magnon, the so-called “electromagnon”, which is an excitationprocess in a multiferroic material with a long-period helical spin structure that is induced by aDzyaloshinsky-Moriya (DM) interaction. We clarify the selection rule and the resonance frequencyof electromagnetic wave absorption due to an electromagnon excitation process via a spin currentmechanism. Under an external magnetic field, the magnon carries a dynamical toroidalmomentTd = P × M, where P and M are the fluctuations of the electric polarization and themagnetization, respectively, and is thus named as the “toroidalmagnon.” The toroidalmagnonshows non-reciprocal directional dichroism (NDD); i.e., an absorption intensity that depends onthe sign of the electromagnetic wave’s propagation direction. In helical magnets induced by theDM interaction, the intensity of the NDD effects can be larger than the absorption intensity ofthe electromagnon. Our results indicate that the observation of the NDD is a crucial test toidentify the coupling between the electric polarization and the helical spin structure, even when theelectromagnon absorption itself cannot be observed due to its small intensity.
ECCD for ALL: Regional Perspectives and Experiences from the Asia-Pacific
Junko Miyahara 한국유아교육학회 2011 INTERNATIONAL JOURNAL OF EARLY CHILDHOOD EDUCATION Vol.17 No.1
Inclusion is about everyone. Inclusive Early Childhood Care and Development (ECCD) therefore requires valuing and respecting the unique needs of every child, and to include all children regardless of their characteristics and backgrounds. While Education For All (EFA) Goal 1 calls for action on expanding and improving comprehensive early childhood care and education, especially for the most vulnerable and disadvantaged children and the Millennium Development Goals (MDGs) have had a positive impact on every young childs rights to survive and thrive, progress in achieving equity and reaching the most disadvantaged children and their families is rather slow globally. The policy imperative has been accepted, but subsequent action-operationalisation-has been difficult to achieve. This paper attempts to discuss regional perspectives on inclusive ECCD by introducing some noteworthy initiatives that address children in disadvantaged circumstances and points to inclusive elements of ECCD. It further suggests the need to generate more evidence specific to the country and to the region on what works in order to influence policy action and practice improvement.