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Experimental study of a 400 V Class DC Microgrid for Commercial Buildings
M. Noritake,K. Yuasa,T. Takeda,K. Shimomachi,R. Hara,H. Kita,T. Matsumura 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
This paper reports the experimental study of a 400 V class DC microgrid for an office building that has been constructed in Obihiro City, Hokkaido, Japan. The objective of this study is to develop a self-sustained distributed energy system by combining distribution energies, batteries, and appliances with DC power. This new DC energy system not only reduces the environment load and improves energy efficiency but also forms a community energy system that can become independent from utility grids and resistant to natural disasters. We have found that compared with AC power supply, the DC system, which uses power generated by solar panels as is, decreases CO₂ emission more than 10%.
Numerical Prediction of Cavitating Flow inside Nozzle Hole Based on Cavitation Bubble Dynamics
( Matsumoto M. ),( Kobashi Y. ),( Matsumura E. ),( Senda J. ),( Fujimoto H. ) 한국액체미립화학회 2010 한국액체미립화학회 학술강연회 논문집 Vol.2010 No.-
In direct injection engines, fuel spray atomization is very important factor for the formation of fuel/air mixture, which influences on the engine performance and exhaust emissions of engine out. Especially, cavitation bubbles breaking out inside the nozzle hole have the significant role for spray atomization process. The purpose of this research is to make the effect of the cavitation on the fuel spray atomization clearly. The numerical model based on the bubble dynamics was proposed in this report, where the behavior of cavitation bubbles is treated as a function of pressure inside the nozzle hole. The prediction of bubble behavior under various conditions in the case of a single bubble was carried out by use of pressure distributions estimated through the experimental results. Primary, the processes of bubble growth and its shrinkage were calculated for each test fuel at given injection pressure. Secondary, the behavior of cavitation bubble was simulated for various initial bubble radiuses. As results of these calculations, although the position of bubble collapsing inside the nozzle hole does not coincide with experimental results, this proposed model predicts quantitatively the temporal change in bubble radius for each case.
Kim, C. D.,Matsumura, M. 대한전자공학회 1993 ICVC : International Conference on VLSI and CAD Vol.3 No.1
A micro-structure has been introduced into the channel of amorphous-silicon thin-film transistors (TFTs) with poly-silicon source and drain novel slant photo-lithography method has been developed for fabricating this TFT without additional photo-masks. TFT off-characteristics have been improved without scarifying its originally good on-characteristics. The temperature dependence is also discussed far this TFT characteristics.
P-Channel Amorphous-Silicon Thin-Film Transistors
Choi, K. S.,Matsumura, M. 대한전자공학회 1993 ICVC : International Conference on VLSI and CAD Vol.3 No.1
The, minimum condition has been presented to p-channel operation of amorphous-silicon thin-film transistors (a-Si TFTs) for forming goad complementary matrices. It was ,shown experimentally that the a-Si TFT can satisfy this demand. Key technologies for the good p-channel TFT operation were of plasma-free (CVD) deposition of the a-Si film and of optimized past-hydrogenation. The best hole mobility obtained to date was 0.4㎠/Vs, more than one-half of typical mobility value for electrons.
Hiroshi Asano,Katsutoshi Oda,Kosuke Yoshihara,Yoichi M Ito,Noriomi Matsumura,Muneaki Shimada,Hidemichi Watari,Takayuki Enomoto 대한부인종양학회 2022 Journal of Gynecologic Oncology Vol.33 No.4
Background: Poly (adenosine diphosphate)-ribose polymerase (PARP) inhibitors for tumors with homologous recombination deficiency (HRD), including pathogenic mutationsin , have been developed. Genomic analysis revealed that about 20% of uterine leiomyosarcoma (uLMS) have HRD, including 7.5%–10% of alterations and 4%–6% of carcinomas of the uterine corpus, and 2.5%–4% of the uterine cervix have alterations of. Preclinical and clinical case reports suggest that PARP inhibitors may be effective against those targets. The Japanese Gynecologic Oncology Group (JGOG) is now planning to conduct a new investigator-initiated clinical trial, JGOG2052. Methods: JGOG2052 is a single-arm, open-label, multi-center, phase 2 clinical trial to evaluate the efficacy and safety of niraparib monotherapy for a recurrent or persistent rare fraction of gynecologic malignancies with mutations except for ovarian cancers. We will independently consider the effect of niraparib for uLMS or other gynecologic malignancies with mutations (cohort A, C) and HRD positive uLMS without mutations (cohort B). Participants must have 1–3 lines of previous chemotherapy and at least one measurable lesion according to RECIST (v.1.1). Niraparib will be orally administered once a day until lesion exacerbation or unacceptable adverse events occur. Efficacy will be evaluated by imaging through an additional computed tomography scan every 8 weeks. Safety will be measured weekly in cycle 1 and every 4 weeks after cycle 2 by blood tests and physical examinations. The sample size is 16–20 in each of cohort A and B, and 31 in cohort C. Primary endpoint is the objective response rate.