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Fine Impedance Matching by Use of Liquid Stub Tuners in ICRF Experiment on LHD
kenji Saito,C. Takahashi,H. Takeuchi,J. G. Kwak,J. S. Yoon,M. Yokota,R. Kumazawa,T. Seki,T. Mutoh,Y. P. Zhao 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
An impedance-matching system with liquid stub tuners was developed for high-power, long-pulse ICRF injection in LHD. In order to predict the optimum liquid heights, a loading resistance and an effective length were calculated. We used a complex reflection coefficient measured at a directional coupler attached to the outlet of an oscillator. The effective length changed, as well as the loading resistance, when the plasma condition was changed. Moreover, the effective length changed during long-pulse ICRF injection. By using the loading resistance and the effective length, the liquid heights for impedance matching were calculated and the reflected power was reduced in discharges having similar plasma parameters. Application of this method to real-time feedback control for long-pulse discharges is now being prepared.
Lightweight Selective Disclosure for Verifiable Documents on Blockchain
Kenji Saito,Satoki Watanabe 한국통신학회 2021 ICT Express Vol.7 No.3
To achieve lightweight selective disclosure for protecting privacy of document holders, we propose an XML format for documents that can hide arbitrary elements using a cryptographic hash function and salts, which allows to be partially digitally signed and efficiently verified, as well as a JSON format that can be converted to such XML. The documents can be efficiently proven to exist by representing multiple such structures as a Merkle tree and storing its root in blockchain. We show that our proposal has advantages over known methods that represent the document itself as a Merkle tree and partially hide it.
Total Cholesterol Level for Assessing Pancreatic Insufficiency Due to Chronic Pancreatitis
( Kenji Hirano ),( Tomotaka Saito ),( Suguru Mizuno ),( Minoru Tada ),( Naoki Sasahira ),( Hiroyuki Isayama ),( Miho Matsukawa ),( Gyotane Umefune ),( Dai Akiyama ),( Kei Saito ),( Shuhei Kawahata ),( 대한소화기학회 2014 Gut and Liver Vol.8 No.5
Background/Aims: To determine the nutritional markers important for assessing the degree of pancreatic insufficiency due to chronic pancreatitis in routine clinical practice. Methods: A total of 137 patients with chronic pancreatitis were followed up for more than 1 year. They were divided into two groups: a pancreatic diabetes mellitus (DM) group, consisting of 47 patients undergoing medical treatment for DM of pancreatic origin, and a nonpancreatic DM group, consisting of 90 other patients (including 86 patients without DM). Serum albumin, prealbumin, total cholesterol, cholinesterase, magnesium, and hemoglobin were compared between the two groups. Results: The total cholesterol was significantly lower in the pancreatic than the nonpancreatic DM group (164 mg/dL vs 183 mg/dL, respectively; p=0.0028). Cholinesterase was significantly lower in the former group (263 U/L vs 291 U/L, respectively; p=0.016). Among the 37 patients with nonalcoholic pancreatitis, there was no difference in the cholinesterase levels between the pancreatic and nonpancreatic (296 U/L vs 304 U/L, respectively; p=0.752) DM groups, although cholesterol levels remained lower in the former (165 mg/dL vs 187 mg/dL, respectively; p=0.052). Conclusions: Cholinesterase levels are possibly affected by concomitant alcoholic liver injury. The total cholesterol level should be considered when assessing pancreatic insufficiency due to chronic pancreatitis. (Gut Liver 2014;8:563-568)
Relationship Between Cigarette Smoking and Muscle Strength in Japanese Men
Saito, Takeshi,Miyatake, Nobuyuki,Sakano, Noriko,Oda, Kanae,Katayama, Akihiko,Nishii, Kenji,Numata, Takeyuki The Korean Society for Preventive Medicine 2012 Journal of Preventive Medicine and Public Health Vol.45 No.6
Objectives: To investigate the link between cigarette smoking and muscle strength in Japanese men. Methods: We used data on 4249 Japanese men, aged $43.3{\pm}13.9$ years, in this cross-sectional investigation study. Grip strength and leg strength were measured as indicators of overall muscle strength. Meanwhile, subjects' cigarette smoking habits were recorded by trained medical staff. The effect of cigarette smoking on muscle strength was evaluated. Results: A total of 1618 men (38.1%) were smokers and 1481 men (34.9%) exercised regularly. Significant differences in muscle strength were noted between men with and without a Brinkman index of 400 or greater, after adjusting for age. After adjusting for age, height, body weight and exercise habits, associations between the Brinkman index and leg strength and the ratio of leg strength to body weight were attenuated. Conclusions: Cigarette smoking might be negatively associated with muscle strength, especially grip strength in Japanese men.
Kenji Masuda,Ko Ebata,Yoshimasa Yasuhara,Akira Enomoto,Tomoyuki Saito 대한척추외과학회 2018 Asian Spine Journal Vol.12 No.5
Study Design: Retrospective study. Purpose: To evaluate the efficacy of the Spinal Instability Neoplastic Score (SINS) in predicting surgical outcomes and survival. Patients were categorized into two groups according to the SINS, and their surgical outcomes and survival following decompression and stabilization were assessed. Overview of Literature: Palliative surgery in patients with a life expectancy ≥3 months may effectively improve their overall condition in the long term. Currently, the effectiveness of the SINS for predicting surgical results and survival remains controversial. Methods: This study included 44 patients who underwent decompression and stabilization for spinal metastases at Yokosuka Kyosai Hospital between 2008 and 2017. The patients were divided into two groups: stable (SINS ≤12) and unstable (SINS ≥13). Changes in the Frankel score and Eastern Cooperative Oncology Group Performance Status (ECOG-PS) were compared between the two groups, and patient survival was evaluated according to the SINS, Tokuhashi score, and Katagiri score. Results: The stable group (SINS range, 7–12) included 24 patients while the unstable group (SINS range, 13–16) included 20 patients. The Frankel score significantly improved from 2.8 to 3.6 in the stable group (p <0.001) and from 2.7 to 3.9 in the unstable group (p <0.001). The ECOG-PS significantly improved from 3.2 to 2.1 in the stable group (p <0.001) and from 3.0 to 1.8 in the unstable group (p <0.001). There was a statistically significant difference in median survival between the two groups. Conclusions: All patients treated with palliative surgery showed favorable outcomes, as indicated by improved the Frankel score and ECOG-PS following surgery. However, median survival was significantly better in the stable group. The results of this study indicate that the SINS is appropriate for surgical decision making and may be used to predict survival.
DETERMINATION AND CORRELATION OF LLE AND SLE DATA FOR THE SYSTEM ANILINE + CYCLOHEXANE
Ochi, Kenji,Kato, Yoshihisa,Saito, Tohru,Kurihara, Kiyofumi,Kojima, Kazuo 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.5
A newly developed laser light scattering technique was used for the determination of mutual solubilities in the aniline+cyclohexane system at moderate pressures. The liquid-liquid equilibria (LLE) were measured from the region of solid-liquid equilibria (SLE) to the upper critical solution temperature. Freezing points in this system were determined by a cooling curve method. The solubility data were correlated with the NRTL equation.
Relationship Between Cigarette Smoking and Muscle Strength in Japanese Men
Takeshi Saito,Nobuyuki Miyatake,Noriko Sakano,Kanae Oda,Akihiko Katayama,Kenji Nishii,Takeyuki Numata 대한예방의학회 2012 예방의학회지 Vol.45 No.6
Objectives: To investigate the link between cigarette smoking and muscle strength in Japanese men. Methods: We used data on 4249 Japanese men, aged 43.3±13.9 years, in this cross-sectional investigation study. Grip strength and leg strength were measured as indicators of overall muscle strength. Meanwhile, subjects’ cigarette smoking habits were recorded by trained medical staff. The effect of cigarette smoking on muscle strength was evaluated. Results: A total of 1618 men (38.1%) were smokers and 1481 men (34.9%) exercised regularly. Significant differences in muscle strength were noted between men with and without a Brinkman index of 400 or greater, after adjusting for age. After adjusting for age, height, body weight and exercise habits, associations between the Brinkman index and leg strength and the ratio of leg strength to body weight were attenuated. Conclusions: Cigarette smoking might be negatively associated with muscle strength, especially grip strength in Japanese men.