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Araki, Kazutoshi,Inami, Takeo,Nakajima, Hiroaki Institute of Pure and Applied Physics 2006 Progress of theoretical physics Vol.116 No.5
<P>We study the instanton equation of the supersymmetric <TEX>$CP^{N-1}$</TEX> sigma model on non(anti)commutative superspace in two dimensions. We show that the undeformed instanton equation is consistent with the deformed equations of motion. Then we conclude that the instanton equation is not deformed by superspace non(anti)commutativity.</P>
Role of Rho-kinase in regulation of insulin action and glucose homeostasis
Furukawa, Noboru,Ongusaha, Pat,Jahng, Wan Jin,Araki, Kazushi,Choi, Cheol Soo,Kim, Hyo-Jeong,Lee, Yong Hee,Kaibuchi, Kozo,Kahn, Barbara B.,Masuzaki, Hiroaki,Kim, Jason K.,Lee, Sam W.,Kim, Young-Bum Elsevier 2005 Cell metabolism Vol.2 No.2
<P><B>Summary</B></P><P>Accumulating evidence indicates an important role for serine phosphorylation of IRS-1 in the regulation of insulin action. Recent studies suggest that Rho-kinase (ROK) is a mediator of insulin signaling, via interaction with IRS-1. Here we show that insulin stimulation of glucose transport is impaired when ROK is chemically or biologically inhibited in cultured adipocytes and myotubes and in isolated soleus muscle ex vivo. Inactivation of ROK also reduces insulin-stimulated IRS-1 tyrosine phosphorylation and PI3K activity. Moreover, inhibition of ROK activity in mice causes insulin resistance by reducing insulin-stimulated glucose uptake in skeletal muscle in vivo. Mass spectrometry analysis identifies IRS-1 Ser632/635 as substrates of ROK in vitro, and mutation of these sites inhibits insulin signaling. These results strongly suggest that ROK regulates insulin-stimulated glucose transport in vitro and in vivo. Thus, ROK is an important regulator of insulin signaling and glucose metabolism.</P>
Mechatronics Education Using Robot Competition in Okayama University of Science
Akagi, Tetsuya,Fujimoto, Shinsaku,Kuno, Hiroaki,Araki, Keisuke,Yamada, Satoshi,Dohta, Shujiro Korean Society for Engineering Education 2010 공학교육연구 Vol.13 No.2
Electronics machines make daily human life more convenient and comfortable and try to ease burdens. When designing and manufacturing such mechatronic systems, the engineers need to have a wide range of knowledge. The purpose of our education is for students to learn to use mechatronic techniques. To realize our goal, we regard "an interest in creation" of our student as an important educational method. In this paper, we propose and try an educational method for mechatronics creation using "their interest". The method is to hold robot competitions between 1st and 3rd year students as a regular curriculum. In order to confirm the progress of our students in our engineering course, in the last year, some students entered the Rescue Robot Contest held in Kobe Japan. As a result, our student team got second place, a great honor considering it was our first attempt. We confirm that the robot competition is a useful method to make students study by themselves.
Efficacy of holmium laser enucleation in patients with a small (less than 30 mL) prostate volume
Ichiro Tsuboi,Yuki Maruyama,Takuya Sadahira,Nobuyoshi Ando,Yasuhiro Nishiyama,Motoo Araki,Takushi Kurashige,Takaharu Ichikawa,Ryoji Arata,Noriaki Ono,Toyohiko Watanabe,Syunji Hayata,Hiroaki Shiina,Yas 대한비뇨의학회 2021 Investigative and Clinical Urology Vol.62 No.3
Purpose: To evaluate the efficacy of holmium laser enucleation of the prostate (HoLEP) in patients with a small prostate volume (≤30 mL). Materials and Methods: We retrospectively evaluated 1,135 patients who underwent HoLEP at two institutions between July 2007 and March 2020. Patients who were not evaluated for the International Prostate Symptom Score (IPSS) before or after HoLEP were excluded. We divided patients into two groups according to estimated prostate volume (ePV): ≤30 (n=198) and >30 mL (n=539). The patient characteristics, IPSS, peak urinary flow rate (Qmax), postvoid residual urine volume (PVR), and other data were compared before and after surgery in each group and between the two groups. Multivariate analysis was performed to identify the factors associated with the efficacy of HoLEP in the group with ePV ≤30 mL. Results: A total of 737 patients were included in this retrospective study. ePV (23.4 mL vs. 50 mL; p<0.001) and PVR differed significantly between the two groups. The IPSS, IPSS-quality of life, PVR, and Qmax significantly improved after HoLEP in both groups. Improvements in the IPSS, IPSS-quality of life, Qmax, and PVR were greater in the >30 mL group (p<0.001), whereas operation time and morcellation time were significantly shorter in the ≤30 mL group. In the multivariate analysis, age <70 years was independently associated with improvement by HoLEP. Conclusions: HoLEP is an effective treatment for patients with a small prostate, even though the extent of improvement after HoLEP was greater in those with a larger prostate.