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Ue, Makoto,Takeda, Masayuki The Korean Electrochemical Society 2002 한국전기화학회지 Vol.5 No.4
Ionic liquids based on l-ethyl-3-methylimidazolium cation $(EMI^+)$ and inorganic or organic anions containing fluorine atoms were applied to electrolyte materials for double-layer capacitors. The double-layer capacitors composed of a pair of activated carbon electrodes and an ionic liquid selected from $EMIBF_4,\; EMINbF_6,\;EMITaF_6,\;EMICF_3SO_3,\;EMI(CF_3SO_2)_2N,\;and\;EMI(C_2F_5SO_2)_2N$ showed inferior low-temperature characteristics to those of a conventional nonaqueous electrolyte based on propylene carbonate (PC) solvent. On the other hand, the capacitor using $EMIF{\cdot}2.3HF$ showed excellent low-temperature characteristics due to its high conductivity at low temperatures, however, it had a lower working voltage $(\~2V)$ than the conventional nonaqueous counterpart $(\~3V)$.
Development of a walking assist machine using crutches (Composition and basic experiments)
Masaru HIGUCHI,Makoto OGATA,Shuta SATO,Yukio TAKEDA 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.1
This paper proposes a walking assist machine for people with walking difficulties. It has crutches operated by the user and a wearable mechanism generates motion of the leg and foot relative to the upper body. First, a healthy person’s swing-through walking using axillary crutches was measured and kinematically analyzed. Based on the results, a composition of a walking assist machine using crutches (WAMC) was proposed. An Experimental apparatus of WAMC was designed and built. It realized walking with desired constant step length. And it was clarified that error of the step length decreases its walking stability. Then we investigated the relationship between walking stability and parameters of walking motion by dynamic simulations. The desired parameters were determined through the simulations Sensors and switches which convey user’s intentions to WAMC were also designed and attached to the WAMC.