東北大学 · 工学
山口武史教授の研究室は、環境に配慮した次世代エネルギー技術と人的要因に基づく安全確保の両輪を軸に研究を展開しています。特に、プラスチック基板を用いた染料感受性太陽電池の効率向上や、赤外線領域にも応答するオスミウム系染料の開発により、太陽光発電の効率的利用を追求しています。一方で、湿った床面での転倒防止に資する靴底の摩擦特性や、高齢化に伴うバランス機能の変化を解明する運動学的・力学的分析も重要な研究テーマです。
Figures are computed from collected data and may differ slightly.
The efficiency of a plastic-substrate dye-sensitized solar cell was much improved by a new method consisting of a press method without heat treatment, light confinement effect of TiO(2) film and water-based TiO(2) paste; this device shows the highest light-to-electrical energy conversion efficiency based on plastic-substrate dye-sensitized solar cells, 7.4% under 100 mW cm(-2) (1 sun) AM1.5 illumination.
Bis(bipyridyl) osmium(II) dyes having a beta-diketonate ligand were synthesized in order to utilize visible and infrared light for dye-sensitized solar cells. Compared to black dye, under AM 1.5 irradiation (100 mW cm(-2)), DSCs using our novel Os dyes exhibited a better spectral response in the near-IR region (by 1050 nm) and showed a higher J(SC) value of 23.7 mA cm(-2).
The present study examined whether a new footwear outsole with tread blocks and a hybrid rubber surface pattern, composed of rough and smooth surfaces, could increase slip resistance and reduce the risk of fall while walking on a wet floor surface. A drag test was performed to measure static and dynamic coefficient of friction (SCOF and DCOF, respectively) values for the footwear with the hybrid rubber surface pattern outsole and two types of commercially available boots that are conventionally
In this study, we aimed to discover (1) the effects of age on dynamic balance measures, including the margin of stability (MOS), whole-body angular momentum (H), and misalignment of the desired and measured centers of pressure (dCOP and mCOP, respectively) in the anteroposterior (AP) and mediolateral (ML) directions, (2) the relationship between gait parameters and these balance measures, and (3) the relationships between these balance measures. We used the kinetic and kinematic data of 151 part
Abstract We present two easily applicable models for simultaneous estimation of the convective velocity ( u 0 ) and the hydrodynamic dispersion coefficient ( D 0 ) from breakthrough curve (BTC) data. The two models can be used for both saturated and unsaturated flow. Both models are derived from an analytical solution to the convection‐dispersion equation (CDE). The first model, labeled the “slope method,” is exact. It uses the slope of the BTC to estimate u 0 and D 0 . The second method is appr
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