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Masashi Yamamoto,Kazuyuki Nakamura 강원대학교 경영경제연구소 2016 Asia-Pacific Journal of Business Vol.7 No.2
Japan’s new local revitalization plan is unique in that the national government has asked local governments to form their own initiatives; and we can expect that there will be various ideas from the perspectives of local residents. However, it is important to note that not all local governments considered the actions of their competitors and neighboring governments. Currently, Japanese industries are so interconnected that we cannot ignore the actions of others. In this paper, we propose a simple indicator that policy makers can use to determine the focus for the local economy.
A Parallel Simulated Annealing on Distributed Computing Resources
Masashi Murayama,Morikazu Nakamura 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
In this paper, we present a parallel simulated annealing (SA) on distributed computing resources. The parallel SA include two types of cooperation mechanism: inner group and inter group cooperations. In the inner group cooperation, SA processes start from the same initial point, however, move to different direction. That is, two concepts: concentration and diversity are included. On the other hand, the inter group cooperation is for load balancing which is performed based on search load factor. Therefore it is useful to balance searching load by reassigning dynamically processors from light load groups to heavy load groups. Computer experiment evaluates effectiveness of the proposed parallel SA.
Measurements of charge exchange neutral particles in Heliotron J
masashi Kaneko,F. Sano,H. Okada,K. Hanatani,K. Nagasaki,K. Kondo,S. Kobayashi,S. Murakami,T. Mizuuchi,Y. Suzuki,Y. Nakamura 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The ion behavior in Heliotron J plasmas is investigated through measurements of the ion energy distribution function, which is measured with a charge-exchange neutral particle analyzer system. The bulk ion temperature is estimated from the measured energy spectrum. In NBI heated plasma, the pitch angle distribution of energy spectra is measured. Dependence of the high energy tail and bulk ion temperature of injection power is investigated in an ion-cyclotron range of frequency heating experiment.)
Yamamoto, Masashi,Nakamura, Kazuyuki KNU The Institute of ManagementEconomy Research 2016 Asia-Pacific Journal of Business Vol.7 No.2
Japan's new local revitalization plan is unique in that the national government has asked local governments to form their own initiatives; and we can expect that there will be various ideas from the perspectives of local residents. However, it is important to note that not all local governments considered the actions of their competitors and neighboring governments. Currently, Japanese industries are so interconnected that we cannot ignore the actions of others. In this paper, we propose a simple indicator that policy makers can use to determine the focus for the local economy.
I/Q Imbalance Compensation in the Presence of Time-Varying Channel
Atsushi Minoda,Masashi Nakamura,Hai Lin,Katsumi Yamashita 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
I/Q signal processing commonly faces the I/Q imbalance problem, which severely degrade the performance particularly in direct-conversion architecture receiver. In this paper, we propose a method for compensating I/Q imbalances using training sequence in time-varying channel. Finally, we estimate the parameters for I/Q imbalance compensation by maximum likelihood estimation (MLE).
The role of renal proximal tubule transport in the regulation of blood pressure
( Shoko Horita ),( Motonobu Nakamura ),( Masashi Suzuki ),( Nobuhiko Satoh ),( Atsushi Suzuki ),( Yukio Homma ),( Masaomi Nangaku ) 대한신장학회 2017 Kidney Research and Clinical Practice Vol.36 No.1
The electrogenic sodium/bicarbonate cotransporter 1 (NBCe1) on the basolateral side of the renal proximal tubule plays a pivotal role in systemic acid-base homeostasis. Mutations in the gene encoding NBCe1 cause severe proximal renal tubular acidosis accompanied by other extrarenal symptoms. The proximal tubule reabsorbs most of the sodium filtered in the glomerulus, contributing to the regulation of plasma volume and blood pressure. NBCe1 and other sodium transporters in the proximal tubule are regulated by hormones, such as angiotensin II and insulin. Angiotensin II is probably the most important stimulator of sodium reabsorption. Proximal tubule AT<sub>1A</sub> receptor is crucial for the systemic pressor effect of angiotensin II. In rodents and rabbits, the effect on proximal tubule NBCe1 is biphasic; at low concentration, angiotensin II stimulates NBCe1 via PKC/cAMP/ERK, whereas at high concentration, it inhibits NBCe1 via NO/cGMP/cGKII. In contrast, in human proximal tubule, angiotensin II has a dose-dependent monophasic stimulatory effect via NO/cGMP/ERK. Insulin stimulates the proximal tubule sodium transport, which is IRS2-dependent. We found that in insulin resistance and overt diabetic nephropathy, stimulatory effect of insulin on proximal tubule transport was preserved. Our results suggest that the preserved stimulation of the proximal tubule enhances sodium reabsorption, contributing to the pathogenesis of hypertension with metabolic syndrome. We describe recent findings regarding the role of proximal tubule transport in the regulation of blood pressure, focusing on the effects of angiotensin II and insulin.
Seiji Ohtori,Takeshi Sainoh,Masashi Takaso,Gen Inoue,Sumihisa Orita,Yawara Eguchi,Junichi Nakamura,Yasuchika Aoki,Tetsuhiro Ishikawa,Masayuki Miyagi,Gen Arai,Hiroto Kamoda,Miyako Suzuki,Gou Kubota,Yos 연세대학교의과대학 2012 Yonsei medical journal Vol.53 No.2
Purpose: Sacroiliac fixation using iliac screws for highly unstable lumbar spine has been reported with an improved fusion rate and clinical results. On the other hand, there is a potential for clinical problems related to iliac fixation, including late sacroiliac joint arthritis and pain. Materials and Methods: Twenty patients were evaluated. Degenerative scoliosis was diagnosed in 7 patients, failed back syndrome in 6 patients, destructive spondyloarthropathy in 4 patients, and Charcot spine in 3 patients. All patients underwent posterolateral fusion surgery incorporating lumbar, S1 and iliac screws. We evaluated the pain scores, bone union, and degeneration of sacroiliac joints by X-ray imaging and computed tomography before and 3 years after surgery. For evaluation of low back and buttock pain from sacroiliac joints 3 years after surgery, lidocaine was administered in order to examine pain relief thereafter. Results: Pain scores significantly improved after surgery. All patients showed bone union at final follow-up. Degeneration of sacroiliac joints was not seen in the 20 patients 3 years after surgery. Patients showed slight low back and buttock pain 3 years after surgery. However, not all patients showed relief of the low back and buttock pain after injection of lidocaine into the sacroiliac joint, indicating that their pain did not originate from sacroiliac joints. Conclusion: The fusion rate and clinical results were excellent. Also, degeneration and pain from sacroiliac joints were not seen within 3 years after surgery. We recommend sacroiliac fixation using iliac screws for highly unstable lumbar spine.