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Hierarchical Information Acquisition Scheme on the Local Broadcasting System
Yusuke Oka,Hiromasa Habuchi,Kouji Ohuchi 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
In this paper, it is proposed the information delivery system that the transmission signal embraces together the wide-area information and the local area information. The distant user from the base station receives the wide-area information only and the nearby user receives together the widearea information and the local-area information. The proposed system uses the code shift keying(CSK) for transmitting the local-area information and the amplitude shift keying(ASK) for the wide-area information. In the proposed system, the broadcast information is hierarchized by combining ASK with CSK.
Houtani, Hidetaka,Komoriyama, Yusuke,Matsui, Sadaoki,Oka, Masayoshi,Sawada, Hiroshi,Tanaka, Yoshiteru,Tanizawa, Katsuji Korean Society of Ocean Engineers 2018 Journal of advanced research in ocean engineering Vol.4 No.4
We herein propose a new design procedure of a flexible container ship model where the vertical bending and torsional vibration modes are similar to its prototype. To achieve similarity in torsional vibration mode shapes, the height of the shear center of the model must be located below the bottom hull, similar to an actual container ship with large opening decks. Therefore, we designed a ship model by imparting appropriate stiffness to the hull, using urethane foam without a backbone. We built a container ship model according to this design strategy and validated its dynamic elastic properties using a decay test. We measured wave-induced structural vibrations and present the results of tank experiments in regular and freak waves.
Diagnosing metabolic acidosis in chronic kidney disease: importance of blood pH and serum anion gap
Kaimori Jun-Ya,Sakaguchi Yusuke,Kajimoto Sachio,Asahina Yuta,Oka Tatsufumi,Hattori Koki,Doi Yohei,Isaka Yoshitaka 대한신장학회 2022 Kidney Research and Clinical Practice Vol.41 No.3
Metabolic acidosis is one of the most common complications of chronic kidney disease (CKD). It is associated with the progression of CKD, and many other functional impairments. Until recently, only serum bicarbonate levels have been used to evaluate acid-base changes in patients with reduced kidney function. However, recent emerging evidence suggests that nephrologists should reevaluate the clinical approach for diagnosing metabolic acidosis in patients with CKD based on two perspectives; pH and anion gap. Biochemistry and physiology textbooks clearly indicate that blood pH is the most important acid-base parameter for cellular function. Therefore, it is important to determine if the prognostic impact of hypobicarbonatemia varies according to pH level. A recent cohort study of CKD patients showed that venous pH modified the association between a low bicarbonate level and the progression of CKD. Furthermore, acidosis with a high anion gap has recently been recognized as an important prognostic factor, because veverimer, a nonabsorbable hydrochloride-binding polymer, has been shown to improve kidney function and decrease the anion gap. Acidosis with high anion gap frequently develops in later stages of CKD. Therefore, the anion gap is a time-varying factor and renal function (estimated glomerular filtration rate) is a time-dependent confounder for the anion gap and renal outcomes. Recent analyses using marginal structural models showed that acidosis with a high anion gap was associated with a high risk of CKD. Based on these observations, reconsideration of the clinical approach to diagnosing and treating metabolic acidosis in CKD may be warranted.