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Ayumi Sudo,Yoshihiko Takahashi 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10
We are developing a range extended electric vehicle using a diesel engine electric generator with plant (vegetable) oil (named as bio EV). The vehicle design concept is a series hybrid electric vehicle. A diesel engine rotates a DC motor by using plant oil to generate electricity, and the developed vehicle runs by using the generated electricity. It is possible to run a long distance without refueling, and plant oil fuels are sustainable natural resources. Generally, a fuel mixture consisting of light oil and plant oil is used as bio fuel. However, in this study, we only used plant oil (SVO: straight vegetable oil or WVO: waste vegetable oil) as bio fuel in order to reduce fuel cost, and avoid using fossil fuel. As the viscosity of SVO or WVO is higher than that of general light oil, it is essential to examine the phenomena of fuel injection and generated voltage change. This paper reports the examination results of the bio fuel injection phenomena and the generated voltage change phenomena.
Current Research on Subchondral Insufficiency Fracture of the Femoral Head
Mingliang Chen,Xipeng Wang,Eiji Takahashi,Ayumi Kaneuji,You Zhou,Kawahara Norio 대한정형외과학회 2022 Clinics in Orthopedic Surgery Vol.14 No.4
Subchondral insufficiency fracture (SIF) of the femoral head is one of the predominant etiologies of rapidly progressive osteoarthritis of the hip (RPOH). SIF is a rare disease that causes acute pain in the hip joint. It is most frequently found in elderly women with osteoporosis. It is often underdiagnosed or misdiagnosed as osteonecrosis of the femoral head. SIF is currently a well-established cause of RPOH; however, the deeper etiology of SIF is not clear. Good clinical outcomes have been reported for hip preservation therapy and hip replacement. SIF is not obvious radiologically in the early stage, and a T1-weighted magnetic resonance imaging shows a discontinuous low-intensity band under the articular cartilage convex to the articular surface as its characteristic manifestation. Some patients will lose the opportunity to preserve the hip joint due to symptoms such as progressive joint space narrowing and subchondral collapse within a very short period. Patients with progressive hip space narrowing and subchondral collapse on Xray should be converted to total hip arthroplasty. Based on the characteristics of the disease, surgeons need to master the clinical and radiological characteristics of SIF and strive for early diagnosis and treatment.