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龍溥重 慶一大學校 1997 論文集 Vol.14 No.2
A contour-following system using an accommodation force control is modeled. The performance of this system is improved by an optimal preview control, which anticipates a future disturbance information. This study presents how to utilize the local future information obtained by the finite preview to minimize optimality criterion evaluated over a problem duration. Simulation results are given based on an industrial robot system.
고유 불안정한 도립진자 시스템의 최적 안정화 제어에 관한 연구
최부귀,박영식,안기형,이취중 동아대학교 공과대학 부설 한국자원개발연구소 1990 硏究報告 Vol.14 No.1
This paper proposes a design techinque of dynamic stabilization controller for the intrinsic unstable inverted pendulum system. Mathematical modelling with the more complex nonlineaity and the stabilized control theory presented by C.D. Johnson are adapted to this system by using the stage-space approach. And the stabilized controller with the designed optimal regulator type which can be fastly tracked and can be accurately counteracted against all effects of the constant disturbances and the parameteric variations is sumulated and is implemented successfully on the microcomputer.
강희용,양성모,김봉철,임재중,용부중 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.1
Cochlea is well known to have the ability to analyze a wide frequency and this ability seems to be caused to the Basilar Membrane(BM) configuration. However, the relationship between the Cochlea frequency-position map is not clear. In this paper, the three-dimensional BM model was made using the Finite Element Method. Then, an attempt was made to examine the influence of the BM configuration on the Cochlea frequency-position map.
조현덕,김유종,용부중,동유게 한국공작기계학회 2005 한국생산제조학회지 Vol.14 No.2
A mirror cam mechanism, a kind of conjugate cam mechanism, consists of two cams, two rollers, and two links. Since profiles of two mirror cams are identical, a simultaneous machining of two cams is achievable. Some machining errors on cam profiles do not result in the internal acting force, which often causes problems in high speed cam mechanism, between two links. Also, since angular accelerations of two links are same, the internal acting force by the difference of the angular accelerations does not occur in the mechanism. Thus the mirror cam mechanism is very useful in high speed machinery. This paper studies a design method as well as a machining method, and develops an exclusive CAD/CAM software for mirror cam profiles. The developed CAD/CAM software is applied to a typical mirror cam mechanism, and a mock-up equipment is built in order to test the machined mirror cam. Experimental investigations show that the contact between cam surface and roller surface according to cam rotation agrees well with the simulation on the developed CAD/CAM software.
Place Multi-Level Near-Secure Communication Mechanism for Mobile Devices
Boo Joong Kang,Eul Gyu Im 대한전자공학회 2008 ICEIC:International Conference on Electronics, Inf Vol.1 No.1
Due to the widespread deployment of wired networks and wireless networks, users can connect to networks using various devices, such as PC, various mobile devices, or cell phones. But the benefit of mobility in the ubiquitous age also brings forth problems, such as privacy violation, unauthorized accesses, and so on from various points. Therefore, the appropriate security technological method should be devised to make the ubiquitous computing environments more convenient and reliable in our life. Security technologies developed for wired network environments cannot be directly applied to mobile environments because of limited resources in mobile environments. In this article, we will suggest a communication mechanism for mobile devices considering limited availability of resources.
방사선 육종 차조기와 백출 복합물이 조골세포와 파골세포의 활성에 미치는 영향
심부용(Boo-Yong Sim)지중구(Joong-Gu Ji) 한국응용과학기술학회 (구.한국유화학회) 2021 한국응용과학기술학회지 Vol.38 No.1
본 연구는 방사선 육종 차조기와 백출 복합물의 조골세포 분화 활성 및 파골세포 형성 억제를 조사하였다. 차조기와 백출 복합물은 MG-63 세포에서 ALP 활성 및 arlizarin red 염색을 확인하였고 조골세포 형성의 영향은 RAW 264.7 세포에서 TRAP 활성과 TRAP 염색을 진행하였다. 세포 독성시험에서 차조기와 백출 복합물은 50 ㎍/㎖ 농도 이하에서 안전한 것으로 확인되었다. ALP 활성 및 골석회화 형성 능력은 대조군보다 활성이 낮았으나;파골세포에서 TRAP 활성을 유의적으로 감소시켰으며;효과적으로 TRAP(+) 다핵세포를 억제하였다. 따라서 차조기와 백출 복합물은 골 흡수 억제 활성을 향상시켜 뼈 관련 질환의 예방 및 치료에 효과적인 것으로 보여진다. The effects of the Perilla frutescens var. crispa and Atractylodes macrocephala Koidzumi mixture on the activities of osteoblast differentiation and the restraint of osteoclast formation were investigated. the Perilla frutescens var. crispa and Atractylodes macrocephala Koidzumi mixture in the human osteoblast “MG-63” cell;was examined in relation to alkaline phosphatase (ALP) activity and alizarin red stains. In order to observe the effects of osteoclasts formation;we analyzed RAW 264.7 cell tartrate-resistant acid phosphatase (TRAP) activity and TRAP stains. In cytotoxicity testing;it was confirmed that apple extract is safe at a concentration of 50 ㎍/㎖ or less. The ALP activity and Bone calcification formation ability were the Perilla frutescens var. crispa and Atractylodes macrocephala Koidzumi mixture had a lower activity than that of control group. However the Perilla frutescens var. crispa and Atractylodes macrocephala Koidzumi mixture significantly reduced activity of TRAP in the RAW 264.7 osteoclastic cell generation and effectively Inhibited the TRAP(+) multinuclear cells. Thus;our results demonstrate that the Perilla frutescens var. crispa and Atractylodes macrocephala Koidzumi mixture enhances the inhibitory activity of bone-resorption in RAW 264.7 cells. In conclusion;the Perilla frutescens var. crispa and Atractylodes macrocephala Koidzumi mixture seem to be effective in the prevention and treatment of bone related disorders.
용부중(Boo-joong Young) 한국자동차공학회 2002 한국자동차공학회 지부 학술대회 논문집 Vol.2002 No.9
Projector type headlamps such as halogen and HID provide a high luminous gradient at the cutoff line, and result in good quality light patterns. This new head lamp technology delivers drivers not only expanded night vision, but also more comfortable nighttime driving. However, if the head lamps arc too bright, they may dazzle other traffics during traversing a rough road or encountering an unexpected bump. To resolve this problem, an auto-leveling of head lamps is necessary. This study uses a preview control for the design of the auto-leveling system, which attenuates a dynamic glare very effectively.