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Yuxiang Zhang,Zhigang Zeng,Xiaoyuan Wang,Shuai Chen,Xuebo Yin 한국지질과학협의회 2020 Geosciences Journal Vol.24 No.1
The origin of the felsic volcanic rocks in the Okinawa Trough (OT) remains uncertain. In the middle Okinawa Trough (MOT), two types of rhyolites (type 1 and type 2 rhyolites) have been recognized. Research on the diverse volcanic rocks should be prioritized to determine the magmatic origins of these rocks. Consequently, in this article, the geochemical differences and controlling factors for these two types of MOT rhyolites are systematically discussed. Type 2 rhyolites have higher Dy/Yb and Nb/Ta ratios than type 1 rhyolites, implying that the former might be influenced by a greater contribution of amphibole. Quantitative models suggest that type 1 rhyolites could have formed via the remelting of andesites when amphiboles remain in the source, whereas type 2 rhyolites could have formed without residual amphiboles. These two distinct melting models effectively explain most discrepancies between the major and trace element compositions of type 1 and 2 rhyolites. Additionally, the lower Mg# and δEu values of type 2 rhyolites are partly caused by significant magmatic differentiation. Quasi-linear correlations between some major oxides, trace element ratios and Sr-Nd isotopic ratios for type 2 rhyolites suggest that these rhyolites might have been contaminated by crustal rocks or melts with compositions similar to those of the Kueishantao (KST) andesites or the Middle Miocene upper crustal rocks of SW Japan. Therefore, isotopically enriched crustal materials likely remain in the OT crust.
Chenjie Meng,Jiaming Zhao,Yuxiang Yin,Jun Luo,Lianying Zhao,Wenbin Jiang,Jianyong Feng 한국섬유공학회 2020 Fibers and polymers Vol.21 No.4
Three-dimensional (3D) printing technology provides an effective alternative for tissue engineering scaffold. Inthis paper, a composite scaffold composed of polylactic acid (PLA) film and 3D printing scaffold was fabricated which couldprovide structural and mechanical support for tissue application. The effects of PLA film/3D printing composite scaffold onscaffold morphology, average diameter, pore diameter, mechanical properties, themal conductivity, electrical conductivity,and surface hydrophilicity were characterized. PLA film/3D printing composite scaffold had larger thickness, bettermechanical and thermal conductivity properties in comparison with pure PLA film and 3D printed scaffold. These resultssuggested that composite scaffold with relatively good overall performance could be a potential candidate for tissueengineering application.
Asymmetric Hysteresis for Probing Dzyaloshinskii–Moriya Interaction
Han, Dong-Soo,Kim, Nam-Hui,Kim, June-Seo,Yin, Yuxiang,Koo, Jung-Woo,Cho, Jaehun,Lee, Sukmock,Klä,ui, Mathias,Swagten, Henk J. M.,Koopmans, Bert,You, Chun-Yeol American Chemical Society 2016 NANO LETTERS Vol.16 No.7
<P>The interfacial Dzyaloshinskii-Moriya interaction (DMI) is intimately related to the prospect of superior domain wall dynamics and the formation of magnetic skyrmions. Although some experimental efforts have been recently proposed to quantify these interactions and the underlying physics, it is still far from trivial to address the interfacial DMI. Inspired by the reported tilt of the magnetization of the side edge of a thin film structure, we here present a quasi-static, straightforward measurement tool. By using laterally asymmetric triangular-shaped microstructures, it is demonstrated that interfacial DMI combined with an in-plane magnetic field yields a unique and significant shift in magnetic hysteresis. By systematic variation of the shape of the triangular objects combined with a droplet model for domain nucleation, a robust value for the strength and sign of interfacial DMI is obtained. This method gives immediate and quantitative access to DMI, enabling a much faster exploration of new DMI systems for future nanotechnology.</P>