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이종실,이응혁,민홍기,홍승홍 한국장애인재활협회 2003 재활복지 Vol.7 No.1
현대 사회에 이르러 생활 환경의 향상과 기술의 발달로 복지에 대한 관심이 높아졌으나 국내의 장애인에 대한 복지 시설은 아직 미비한 수준이다. 보도의 점자 블록이나 신호등의 보행 음향 외에 시각 장애인이 실외 활동을 하기 위한 안내 시설이 거의 없어 많은 불편을 초래한다. 따라서 시각장애인을 위한 안전하고 편안한 보행을 위한 보조장치가 필요하다. 본 연구에서는 시각장애인에게 보다 안전하고 편리한 보행보조 수단을 제공하기 위하여 계단 승월이 가능한 유도로봇을 개발하였으며, 이의 시스템은 실외에서 장시간사용이 가능하도록 저전력 구동이 가능한 이동로봇 제어부, 외부 위치 정보를 GPS에 의해 유도가 가능하도록 자기위치추정시스템과 계단 승월이 가능한 메카니즘부로 구성하였다. 제안된 시각장애인 유도로봇의 구동을 위하여 이동 로봇 구동 및 운용 소프트웨어를 개발하였으며, 초음파 센서 어레이를 이용한 장애물 인식을 통한 스테레오 음성 유도 알고리즘, 관성항법시스템을 이용한 주행 경로 보정 시스템 및 알고리즘, 시각 장애인 유도를 위한 점자 보도 블록 인식 기법을 개발하였다. 자기위치추정시스템에서는 자기위치 추적 시스템 H/W와 사용자 인터페이스 개발로서 DGPS수신 모듈과 점자 입력기 및 인터페이스 기법을 개발하였으며, 계단 승월을 위한 유도로봇 메카니즘으로 유성 차륜 방식을 이용하여 이동 메커니즘을 설계하였다. Interest about welfare by upgrade of living environment and development of technology to reach in modern society but welfare facilities about disabled person are unprepared level yet. It causes many discomforts because there is seldom guidance equipment that the visually impaired except Braillewriter type block or walk sound of signal lamp does outdoor activity. Therefore, we need auxiliary equipment for more safe and well walk for the visually impaired. The purpose of this study is to develop a stair-climbing guide robot as auxiliary equipment for the visually impaired. We developed a control part with low-power usable for many long hours outside the door, self-localization system guiding the robot by using the GPS of localization information and mechanism part with an ability of climbing stairs. We developed mobile robot driving and operating software to operate the guidance robot for the visually impaired such as obstacle detection with ultrasonic sensor array, obstacle avoidance through the sound imaging method, position calibration using INS (Initial Navigation System) and detection of braille blocks. In self-localization system, we developed a self-localization H/W and user interface, we adapted DGPS receiver module and suggested a method to interface for braille keypad. For ability of climbing stairs, we constructed wheel mechanism of a guide robot using planetary type.
Lee, Kyung-Shil,Kwon, Young-Hyuk,Herr, Yeek,Shin, Seung-Il,Lee, Ji-Yeon,Chung, Jong-Hyuk Korean Academy of Periodontology 2010 Journal of Periodontal & Implant Science Vol.40 No.6
Purpose: The aim of this case report is to present a case of incomplete bone formation after sinus augmentation. Methods: A patient having alveolar bone resorption of the maxillary posterior edentulous region and advanced pneumatization of the maxillary sinus was treated with sinus elevation using deproteinized bovine bone in the Department of Periodontology, Kyung Hee University School of Dentistry and re-evaluated with computed tomography (CT) follow-up. Results: Even though there were no significant findings or abnormal radiolucency on the panoramic radiograph, incomplete bone formation in the central portion of the augmented sinus was found fortuitously in the CT scan. The CT scan revealed peri-implant radiolucency in the apical portion of the implant placed in the augmented maxillary sinus. Nevertheless, the dental implants placed in the grafted sinus still functioned well at over 15 months follow-up. Conclusions: The result of this case suggests that patients who received maxillary sinus augmentation may experience incomplete bone formation. It is possible that 1) osteoconductive graft material with poor osteogenic potential, 2) overpacking of graft material that restricts the blood supply, and 3) bone microbial contamination may cause the appearance of incomplete bone formation after sinus augmentation. Further studies are needed to elucidate the mechanism of this unexpected result and care must be taken to prevent it.
Lee, Hae Young,Yang, Byoung-Chul,Lee, Eun-Shil,Chung, Jong Ii,Koh, Phil Ok,Park, Moon Seok,Kim, Myeong Ok Korean Association of Anatomists 2011 Anatomy & Cell Biology Vol.44 No.3
<P>Fetal alcohol syndrome (FAS) is a developmental neuropathology resulting from <I>in utero</I> exposure to ethanol; many of ethanol's effects are likely to be mediated by the neurotransmitter γ-aminobutyric acid (GABA). We studied modulation of the neurotransmitter receptor GABA<SUB>B</SUB>R and its capacity for intracellular signal transduction under conditions of ethanol treatment (ET) and RNA interference to investigate a potential role for GABA signaling in FAS. ET increased GABA<SUB>B1</SUB>R protein levels, but decreased protein kinase A-α (PKA-α), calcium/calmodulin-dependent protein kinase II (CaMKII) and phosphorylation of cAMP-response element binding protein (p-CREB), in cultured hippocampal neurons harvested at gestation day 17.5. To elucidate GABA<SUB>B1</SUB>R response to ethanol, we observed the effects of a GABA<SUB>B</SUB>R agonist and antagonist in pharmacotherapy for ethanol abuse. Baclofen increased GABA<SUB>B</SUB>R, CaMKII and p-CREB levels, whereas phaclofen decreased GABA<SUB>B</SUB>R, CaMKII and p-CREB levels except PKA-α. Furthermore, when GABA<SUB>B1</SUB>R was knocked down by siRNA treatment, CaMKII and p-CREB levels were reduced upon ET. We speculate that stimulation of GABA<SUB>B1</SUB>R activity by ET can modulate CaMKII and p-CREB signaling to detrimental effect on fetal brain development.</P>
극초미세 형상 부품용 고온 나노 임프린팅 장비의 구조 변형 최소화 설계
김실근(Shil Geun Kim),장성현(Sung Hyun Jang),김성민(Sung Min Kim),최영휴(Young Hyu CHoi),이재종(Jae Jong Lee) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-
This paper presents a design optimization of a thermal nano-imprinting machine structure using a genetic algorithm with variable penalty function. Design problem, in this study, is to find out structural member sizes to minimize weight and complianc of the machine structure simultaneously subject to some design constraints. After design optimization, the static compliance of the machine structure was reduced by 30% with reduce of weight by 7.2% than before. The measured compliance of the thermal nano-imprinting machine showed good agreement with the theoretically optimized value.
박종현 ( Jong Hyun Park ),박성환 ( Sung Hwan Park ),김백선 ( Paek Sun Kim ),이준욱 ( Joon Wook Lee ),유완희 ( Wan Hee Yoo ),주영실 ( Yeong Shil Joo ),이신석 ( Shin Seok Lee ),김완욱 ( Wan Uk Kim ),민준기 ( Jun Ki Min ),홍연식 ( Ye 대한류마티스학회 1999 대한류마티스학회지 Vol.6 No.3
Dermatomyositis is a clinical entity characterized by a distinctive cutaneous rash and inflammatory myopathy. In this disorder, the pneumomediastinum is quite a rare complication and is assumed to result from air leakage due to vasculitis, lung fibrosis or rarely after bronchoscopic lung biopsy and pulmonary function test. We describe patient with dermatomyositis who developed pneumomediastinum, pneumothorax and massive subcutaneous emphysema after pulmonary function test. She died due to respiratory failure. We think that careful observation is required in performing PFT in dermatomyositis patients with presumed interstitial lung diseases.
극초미세 형상 부품용 고온 나노 임프린팅 장비의 구조 변형 최소화 설계
김실근(Shil Geun Kim),장성현(Sung Hyun Jang),김성민(Sung Min Kim),최영휴(Young Hyu CHoi),이재종(Jae Jong Lee) 한국생산제조학회 2007 한국생산제조시스템학회 학술발표대회 논문집 Vol.2007 No.5
This paper presents a design optimization of a thermal nano-imprinting machine structure using a genetic algorithm with variable penalty function. Design problem, in this study, is to find out structural member sizes to minimize weight and complianc of the machine structure simultaneously subject to some design constraints. After design optimization, the static compliance of the machine structure was reduced by 30% with reduce of weight by 7.2% than before. The measured compliance of the thermal nano-imprinting machine showed good agreement with the theoretically optimized value.