A consideration on robust design optimization problem through formulation of multiobjective optimization

application/pdfJournal of Advanced Mechanical Design, Systems, and Manufacturing. 2018, 12 (2), P.JAMDSM0058journal articl

岩石の脆性破壊のモデル化に関する研究

Microcracks-related fabric, determined using a stereological method, is represented quantitatively by means of the crack tensor introduced by, and brittle failure of granitic rock (Inada granite) is discussed based on the crack tensor analysis. Orientation of stress-induced microcracks doesn't change much during brittle failure, depending primarily on the orientation of pre-existing microcracks. Inelastic volumetric strain at failure decrease with increasing confining pressure due to the fact that crack opening is controlled by the confining pressure.textapplication/pdfdepartmental bulletin pape

Observation of B̅0→DsJ*(2317)+K- Decay

journal articl

Solar neutrino measurements in Super-Kamiokande-II

The results of the second phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first phase. The solar neutrino flux spectrum and time variation as well as oscillation results are statistically consistent with the first phase and do not show spectral distortion. The timedependent flux measurement of the combined first and second phases coincides with the full period of solar cycle 23 and shows no correlation with solar activity. The measured 8B total flux is (2:38± 0.05(stat.)/begin+0.16 // -0.15/end (sys.)) × 10^6 cm^{-2} s^{-1} and the day-night difference is found to be (-6.3 ±4.2(stat.)±3.7(sys.))%.There is no evidence of systematic tendencies between the first and second phases.journal articl

Resonant photon transport through metal-insulator-metal multilayers consisting of Ag and SiO(2)

We have conducted experimental and numerical studies on resonant photon transport through Ag-SiO2-Ag multilayers with varying SiO2 gap-layer thickness due to its application toward the development of a metamaterial superlens. Photon-transport spectra that have been measured using a double-prism system with a p-polarized He-Ne laser show a resonant photon tunneling _RPT_ peak in the total reflection region and an additional peak in the propagating region. Calculated dispersion curves and electric field profiles reveal that the RPT peak is brought about by antisymmetrically coupled surface-plasmon polaritons _SPPs_, very similar to the long-range SPPs in a single-metal film. The additional peak, however, is caused by TM guided modes with symmetrically coupled SPPs. We demonstrate that the TM0 guided modes move continuously from the total reflecting region to the propagating region as the gap-layer thickness decreases. This will enable us to realize a device which converts evanescent waves into propagating waves of light, opening the possibility of an alternative type of hyperlens.journal articl