Synthesis of Magnetically Intensified Aluminosilicate

Intensification of magnetic susceptibility of the zeolite ensures not only quick and reliable separation of the zeolite from waste medium by using a magnetic separation but also efficient micro-wave heating of the zeolite.Thus,reinforcement of magnetic susceptibility of the zeolite has been attempted.In this study,a composite material has been synthesized by adding magnetite during a synthesis process of the zeolite.And the composite was evaluated by using XRD and SEM.It was composed of zeolite and magnetite.And,its shape was polygonal with a few micrometers size under the synthesis time of 4 weeks.Its magnetization in magnitude was about 400 times larger than that of the normally synthesized zeolite.And the mass ratio of the zeolite and the magnetite in the synthesized material was estimated at about 7.8:1.     

东京晴海岛海神广场的结构制振设计

东京晴海岛海神广场建于2001年,是由3栋超高层智能型办公大楼及周边商业设施构成的综合建筑群。基于抗震性能设计理念,结构设计师在这3栋超高层办公大楼里合理地布置了阻尼器,以用来有效地吸收大地震时的地震能量。本文介绍了大楼的结构体系和设计方针,同时也介绍了制振构件的布置及其制振效果的验证。     

Terahertz Active Metamaterials Based on Stacked Closed‐Ring Resonator Arrays

Metamaterials, which can show novel optical functionalities beyond conventional optics, have been actively studied in recent years. As one of approaches to add tunability on resonant characteristics of metamaterials, slightly shifting relative position of stacked metamaterials or metasurfaces has been reported. In this study, based on numerical simulation we have designed stacked closed‐ring resonator (CRR) arrays that show relatively large spectral shift with a small lateral shift of the stacked layers in terahertz (THz) range. We also show that changing dielectric constant of the dielectric media between CRR arrays is also effective to obtain large spectral shift of the resonant responses. Our findings may be utilized to develop novel type of THz active devices and also sensing devices.     

Nondestructive Methods for Identifying Injury to Vapor Heat-Treated Papaya

Polygalacturonase, a softening enzyme, influenced the development of physiologically injured fruit treated with vapor heat. Development of a nondestructive method to identify injured fruit was studied. X-ray computed tomography (CT), and ¹H-MRI, applied in the medical profession and for food analyses, were investigated for this purpose. Results showed that the X-ray CT, image analyses of the MRI differentiated between normal and injured fruit. The possibility of developing a nondestructive analysis using this technology is suggested.