http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
안용석(Yong-Seok Ahn),백운경(Woon-Kyung Baek) 한국정보기술학회 2016 한국정보기술학회논문지 Vol.14 No.6
In the early design stage of underwater vehicles, it is important to estimate the vehicle’s underwater motion performance. The key design elements for the motion are propellers, battery power, and underwater resistance of the vehicle. Small thrusters with motor and propeller are usually used for the UUV(unmanned underwater vehicles). In this study, a multi-physics thruster model combining electro-mechanical and hydrodynamics characteristics was proposed to estimate the thruster performance. To show the applicability of the model, an existing thruster was used to derive the electro-mechanical and hydrodynamics equations with known parameters. Hydrodynamic parameters were calculated for a 3D geometry model of the propeller by ANSYS/CFX program. Finally, Matlab/simulink program was used for the numerical simulation to predict the thruster performance from the given voltage/current input to the motor. The thruster performance curves obtained from this simulation were confirmed to be similar with those results by Yoerger and Healey.
안용석(Yong-Seok Ahn),백운경(Woon-Kyung Baek) 한국정보기술학회 2017 한국정보기술학회논문지 Vol.15 No.5
In this paper, a model based analysis method was proposed using the equations of motion of the HAUV, containing the thruster model. PD control was used in the Matlab/simulink simulation for the motion analysis. HAUV’s paremeters was obtained from the CFD analysis by ANSYS Fluent. The simulation was to move the HAUV toward the target and the time-response of the thruster was obtained as the current, RPM, and thrust force. The combined results were the basic vehicle performance containing velocities, battery requirements, and operational distance of the HAUV. The model based motion performance analysis is capable of fast remodelling even if the design requirements are changed at the system/parts level because the part models are included in system model. The model based motion performance analysis can offer the designers a powerful design tool in case of changing requirements of the system or components level.
강나래,이원우,고주영,김현수,김준성,안용석,고창익,정준범,전유진,Kang, Nalae,Lee, WonWoo,Ko, Ju-Young,Kim, Hyun-Soo,Kim, Junseong,Ahn, Yong-Seok,Ko, Chang-Ik,Jeong, Joon Bum,Jeon, You-Jin 한국해양바이오학회 2014 한국해양바이오학회지 Vol.6 No.2
In this study, we investigated the bioactive substances of the Alcalase hydrolysate obtained from fishery processing by-products in Jeju by measuring bioactivities including radical scavenging acitivty, cytoprotective activity against 2,2-azobis-(2-amidino-propane) dihydrochloride (AAPH), and ACE inhibitory activity. This study is important because of utilization of unused fishery processing by-products in Jeju. The Alcalase hydrolysate was prepared through the hot water extraction and enzymatic hydrolysis, and then further separation of the Alcalase hydrolysate was performed by ultrafiltration using 10 kDa molecular weight cut-off membrane. The Alcalase hydrolysate showed the relatively higher DPPH and peroxyl radical scavenging activity ($IC_{50}$ value; 1.30 mg/ml and 0.888 mg/ml, respectively). Also, the Alcalase hydrolysate showed the ACE inhibitory activity with 1.87 mg/ml of $IC_{50}$ value. These biological activities are increased over 1.2 or 2.5 times through the ultrafiltration of the Alcalase hydrolysate. Therefore, the Alcalase hydrolysate obtained from fishery processing by-products in Jeju and the different molecular weight fractions should be given consideration for food and cosmetics ingredient. Furthermore, this research on the utility of fishery processing by-products might be a useful tool into the industry.
Docosahexaenoic acid의 모유두세포 증식 효능 및 기전
고지연,오일중,강정일,최윤경,윤훈석,유은숙,고창익,안용석,Ko, Jiyeon,Oh, Il-Joong,Kang, Jung-Il,Choi, Youn Kyung,Yoon, Hoon-Seok,Yoo, Eun-Sook,Ko, Chang-Ik,Ahn, Yong-Seok 제주대학교 의과학연구소 2019 The Journal of Medicine and Life Science Vol.16 No.3
Docosahexaenoic acid (DHA), a principal of mackerel-derived fermented fish oil, increases the proliferation of dermal papilla cells (DPCs) via the upregulation of cell cycle-associated proteins such as cyclin D1 and cdc2 p34, and might promote hair-growth. However, the intracellular mechanisms that underlie the action of DHA in the proliferation of DPCs have not been investigated fully. In this study, we addressed the action mechanisms of DHA to trigger the activation of anagen in DPCs. DHA activated β-catenin signaling by the increased phosphorylation at serine 552 and serine 675 as well as the translocation and accumulation of activated β-catenin into the nucleus. In the other hand, DHA inhibited canonical TGF-β/Smad signaling by the decreased phosphorylation of Smad2/3. Taken together, the results indicate that DHA might stimulate anagen signaling via the activation of Wnt/β-catenin pathway, while the inactivation of canonical TGF-β signaling pathway in DPCs.