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Mitsukuri, Yuki,Hara, Ryoichi,Kita, Hiroyuki,Watanabe, Keiichi,Mori, Kenjiro,Kataoka, Yasuhiro,Kogure, Eiji,Mishima, Yuji The Korean Institute of Electrical Engineers 2014 The Journal of International Council on Electrical Vol.4 No.2
A surge of needs for the low carbon society promotes a spread of electric vehicle (EV). EVs could be charged at night simultaneously, as a result, severe voltage drop may happen. The authors have proposed the method which can compensate the voltage drop caused by EV charging by means of adjusting charging schedules and controlling reactive power. And, we have confirmed the effectiveness of the method by estimating steady state in order to figure out the limitation of the control capability. In this paper, from a practical viewpoint, we propose the method to consider dynamic behavior. In this method, the EV can not only finish charging effectively but also control minimal reactive power to keep admissible voltage with monitoring system voltage.
( Osamu Kawamura ),( Yukie Kohata ),( Noriyuki Kawami ),( Hiroshi Iida ),( Akiyo Kawada ),( Hiroko Hosaka ),( Yasuyuki Shimoyama ),( Shiko Kuribayashi ),( Yasuhiro Fujiwara ),( Katsuhiko Iwakiri ),( M 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2016 Journal of Neurogastroenterology and Motility (JNM Vol.22 No.4
Background/Aims Twenty-four-hour esophageal impedance and pH monitoring allows detection of all types of reflux episodes and is considered the best technique for identifying gastroesophageal refluxes. However, normative data for the Japanese population are lacking. This multicenter study aimed to establish the normal range of 24-hour esophageal impedance and pH data both in the distal and the proximal esophagus in Japanese subjects. Methods Forty-two healthy volunteers (25 men and 17 women) with a mean ± standard deviation age of 33.3 ± 12.4 years (range: 22-72 years) underwent a combined 24-hour esophageal impedance and pH monitoring. According to the physical and pH properties, distal or proximal esophageal reflux events were categorized. Results Median 45 reflux events occurred in 24 hours, and the 95th percentile was 85 events. Unlike previous reports, liquid-containing reflux events are median 25/24 hours with the 95th percentile of 62/24 hours. Acidic reflux events were median 11/24 hours with the 95th percentile of 39/24 hours. Non-acidic gas reflux events were median 15/24 hours with the 95th percentile of 39/24 hours. Proximal reflux events accounted for 80% of the total reflux events and were mainly non-acidic gas refluxes. About 19% of liquid and mixed refluxes reached the proximal esophagus. Conclusions Unlike previous studies, liquid-containing and acidic reflux events may be less frequent in the Japanese population. Non-acidic gas reflux events may be frequent and a cause of frequent proximal reflux events. This study provides important normative data for 24-hour impedance and pH monitoring in both the distal and the proximal esophagus in the Japanese population.
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.
Inoue Takaki,Maki Satoshi,Furuya Takeo,Okimatsu Sho,Yunde Atsushi,Miura Masataka,Shiratani Yuki,Nagashima Yuki,Maruyama Juntaro,Shiga Yasuhiro,Inage Kazuhide,Orita Sumihisa,Eguchi Yawara,Ohtori Seiji 대한척추외과학회 2023 Asian Spine Journal Vol.17 No.4
Study Design: Retrospective study.Purpose: To compare the radiographic risk factors for decreased cervical lordosis (CL) after laminoplasty, focusing on the difference between cervical spondylotic myelopathy (CSM) and cervical ossification of the posterior longitudinal ligament (C-OPLL).Overview of Literature: A few reports compared the risk factors for decreased CL between CSM and C-OPLL although these two pathologies have their characteristics.Methods: This study included 50 patients with CSM and 39 with C-OPLL who underwent multi-segment laminoplasty. Decreased CL was defined as the difference between preoperative and 2-year postoperative neutral C2–7 Cobb angles. Radiographic parameters included preoperative neutral C2–7 Cobb angles, C2–7 sagittal vertical axis (SVA), T1 slope (T1S), dynamic extension reserve (DER), and range of motion. The radiographic risk factors were investigated for decreased CL in CSM and C-OPLL. Additionally, the Japanese Orthopedic Association (JOA) score was assessed preoperatively and 2 years postoperatively.Results: C2–7 SVA (<i>p</i> =0.018) and DER (<i>p</i> =0.002) were significantly correlated with decreased CL in CSM, while C2–7 Cobb angle (<i>p</i> =0.012) and C2–7 SVA (<i>p</i> =0.028) were correlated with decreased CL in C-OPLL. Multiple linear regression analysis revealed that greater C2–7 SVA (<i>B</i> =0.22, <i>p</i> =0.026) and small DER (<i>B</i> =−0.53, <i>p</i> =0.002) were significantly associated with decreased CL in CSM. By contrast, greater C2–7 SVA (<i>B</i> =0.36, <i>p</i> =0.031) was significantly associated with decreased CL in C-OPLL. The JOA score significantly improved in both CSM and C-OPLL (<i>p</i> <0.001).Conclusions: C2–7 SVA was associated with a postoperative decreased CL in both CSM and C-OPLL, but DER was only associated with decreased CL in CSM. Risk factors for decreased CL slightly differed depending on the etiology of the condition.