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( Kazutami Sakamoto ),( Yuji Yamashita ),( Hiroyasu Ohtaka ),( Yosuke Hashimoto ),( Masaki Takemura ),( Yoshikazu Uchida ) 한국피부장벽학회 2013 한국피부장벽학회지 Vol.15 No.2
Trans-Urocanic acid (t-UCA) is recognized as an end metabolite of filaggrin via histidine which is a part of NMF amino acids in the stratum corneum (SC). As an intrinsic chromophore in SC under UV exposure, t-UCA converts to cis isomer (c-UCA) which initiates UV-induced immunosuppression. There are controversial discussions about c-UCA whether its immunosuppressive function is for the protection of body or rather to trigger carcinogenic reactions. Even though, existence of t-UCA in SC and conversion to c-UCA by UV radiation is real events evolved in Nature for the mammalian skin especially in human. The objective of this study is to investigate the transient isomerization of t-UCA in SC to c-UCA during the course of seasonal solar UV Index change in order to better understand the role of UCA for the skin physiology. Ten volunteers with age 21 to 34 are recruited and UCA isomer ratio was measured twice a week for six weeks (Sep 14th through Oct 19 in 2012). SC samples were tape stripped from the inner upper arm and UCA isomers are analyzed by HPLC. Average cis/trans ratio decreased gradually from c.a. 2.0 to 0.2. Solar UV Index reported for the area of experiment also decreased by the duration of days during the 6 weeks test period and there are good correlation found between isomer ratio and Solar UV Index. As a result, dynamic photo-isomerization of UCA in response to the solar UV radiation was confirmed. This finding would lead us further investigation of the functional roles of UCA in the skin especially for the Filaggrin mutation and Atopic Dermatitis, which is one of the hot topics in skin science.
Construction method of Lyapunov functions based on eigen analysis
Yuki Nishimura,Yuh Yamashita,Kanya Tanaka,Yuji Wakasa 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, we show discretized Lyapunov functions for various nonlinear dynamical systems by using the method that the authors have proposed. We use Kushner’s scheme of difference approximation with directions and Alcaraz et al.’s quantization of Markov processes to approximate Lyapunov equations by linear Schr¨odinger-like equations. We construct time-invariant functions concerned with the solutions to Schro¨dinger-like equations. Then, we show the effectiveness of the method via an example.
Structural Design of High-Rise Building in Toranomon-Azabudai Project (A Block)
Kazumasa, Okabe,Kai, Toyama,Takuya, Furuta,Jyunichi, Yamashita,Hiroki, Mukai,Takahiro, Goseki,Shingo, Masuda,Dai, Shimazaki,Yusuke, Miyagi,Yuji, Ozawa Council on Tall Building and Urban Habitat Korea 2022 International journal of high-rise buildings Vol.11 No.3
This paper explains about structural planning and structural design of the high-rise building in Toranomon-Azabudai Project (A Block) which is now under construction. The building is about 330 meters high, has 4.2 aspect ratio, and the outline of the building has shallow curve. We adopted seismic response control structure. The building is a steel rigid frame structure with braces, and it has enough stiffness to obtain its primary natural period to be less than about seven seconds, in consideration of wind response, seismic response and inhabitability for the wind shaking. In terms of business continuity plan, the building has a high seismic performance; value of story drift angle shall be 1/150 or less and members of the building remain almost undamaged while or after a large earthquake. Active mass dumper shall be installed at the top of the building to improve inhabitability while strong wind is blowing.
Hirosato Tamari,Shiro Oka,Takahiro Kotachi,Hajime Teshima,Junichi Mizuno,Motomitsu Fukuhara,Hidenori Tanaka,Akiyoshi Tsuboi,Ken Yamashita,Ryo Yuge,Yuji Urabe,Yasuhiko Kitadai,Koji Arihiro,Shinji Tanak 대한위암학회 2023 Journal of gastric cancer Vol.23 No.4
Purpose: Dental floss clip (DFC) traction-assisted endoscopic submucosal dissection (ESD) is widely performed owing to its simplicity. This study aimed to clarify the appropriate indications for the DFC traction method in early gastric cancer when ESD is performed by less-experienced endoscopists. Methods and Methods: We retrospectively analyzed 1,014 consecutive patients who had undergone gastric ESD performed by less-experienced endoscopists between January 2015 and December 2020. Gastric ESD was performed without DFC in all cases before December 2017 [DFC (−) group, 376 cases], and ESD was performed with DFC in all cases after January 2018 [DFC (+) group, 436 cases]. The procedure time and rates of en bloc resection, complete resection, and adverse events of the groups were compared. Results: The procedure time did not differ significantly between the 2 groups. However, when comparing lesions >20 mm, the procedure time in the DFC (+) group was significantly shorter than that in the DFC (−) group (95±46 vs. 75±31, P<0.01). The procedure time for lesions located in the greater curvature of the upper or middle stomach and lesions >20 mm located in the lesser curvature side of the stomach in the DFC (+) group was significantly shorter than that in the DFC (−) group. Conclusions: The indications for DFC during gastric ESD by less-experienced endoscopists include lesions located in the greater curvature of the upper or middle stomach, and lesions >20 mm located in the lesser curvature of the stomach.