접근객체 인식 및 전송을 위한 영상 디지털 도어락 시스템 설계

이상락 ( Sang Rack Lee ),박진태 ( Jin Tae Park ),우병현 ( Byoung Hyoun Woo ),최한고 ( Han Go Choi ) 한국정보처리학회 2014 정보처리학회논문지. 소프트웨어 및 데이터 공학 Vol.3 No.6

기존 사용되고 있는 디지털 도어락 시스템은 사용자의 편의에 중점을 두어 보안 측면에서는 취약한 단점이 있다. 이에 본 논문은 중계 기, 서버, 카메라와 센서, 통신 모듈이 결합된 디지털 도어락 시스템화하여 도어락 설치장소 전방에서 접근하는 객체를 감지 및 인식하고 이미지와 문 열림 정보를 사용자의 스마트 디바이스로 전송해 주는 영상 디지털 도어락 시스템을 제안하고자 한다. 제안한 시스템은 실험 결과 대상거리 내에서 96∼98%의 접근자 인식률과 사용 통신망에 따라 평균 약 17.1∼23.9초의 전송시간이 소요되었다. 따라서 도어락 시스템 전방의 상황을 모니터링하여 실시간 보안 대응이 가능할 것으로 판단된다. Current digital door lock systems are mainly designed for users` convenience, so they have weakness in security. Thus, this paper suggests a video digital doorlock system grouped with a relay device, a server, and a digital doorlock with a camera, sensors, and communication modules, which is detecting or recognizing objects approaching to the front of the door lock system and sending images and door-opening information to users` smart devices. Experiments showed that the suggested system has 96∼98% recognition rate of approaching objects and requires 17.1∼23.9 seconds for transmission on average, depending on network systems. Therefore, the system is thought to have enough capability for real time security response by monitoring the front area of the doorlock system.

구조 동특성 분석을 통한 군용 차량 프레임 진동 저감

이상정(Sang-Jeong Lee),박종범(Jong-Beom Park),박노철(No-Cheol Park),이종학(Jong-Hak Lee),김한생(Han-Shang Kim),정의봉(Eui-Bong Jeong) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10

Unlike ordinary vehicle chassis frame, chassis frame of military vehicle is long and that is operated in harsh driving environment in middle of war. Thus, because large dynamic loads is acting on the frame, it is important to secure the durability of the frame based on the structural dynamic characteristic analysis. The purpose of the study is that the chassis frame is optimized to secure durability of the chassis frame of the military vehicle according to the structural dynamic characteristic analysis. Also, structure optimization are performed using parametric optimization and topology optimization methods.

Delft-3D를 이용한 온천천의 조위 영향범위 검토

이상화,이한승,김재중,박동훈,Lee, Sang-Hwa,Lee, Han-Seung,Kim, Jae-Jung,Park, Dong-Hun 한국수자원학회 2012 한국수자원학회논문집 Vol.45 No.5

최근water front나 자연형 하천의 개발이 많아지는 가운데 해안에 인접한 하천설계에 있어 일반적으로 기점 홍수위가 만조 시 수위보다 높게 계산되면 조석의 영향을 고려하지 않고 기점 홍수위만으로 수리해석을 하는 경우가 대부분이다. 그러나 본 연구는 기점 홍수위가 만조 시 수위 보다 높더라도 밀려오는 조류의 영향으로 하천 기점 홍수위의 변화를 야기시킬 수 있을 것이라 판단하여 부산의 지방하천인 온천천이 조석현상에 의해 어떤 흐름의 변화가 발생하는지를 Delft-3D를 이용하여 분석하였다. 수치해석 결과 하류 경계조건에 조석영향을 고려하였을 경우 하천의 일정범위까지 수위가 조석의 주기성을 나타내었고 하천 상류방향으로 수위 변동범위가 확대되었다. Recently, as the development of water front and natural type river is gradually increasing, it is mostly the case in that the flow analysis is implemented by only the flood level of the starting point without the tidal effect when the flood water level of the starting point is highly estimated than the high tidal water level in the design of river adjacent to an estuary. This research has analyzed the variation of tidal current for Oncheon river in Busan using Delft-3D program, considering that the tidal effect can cause the change of the flood water level of the starting point although the flood water level is higher than the flood tide level. As a result, considering the tidal effect at downstream boundary condition, water level indicates a periodicity of tide in particular region and the fluctuation range of water level is extended to upstream.

응용 프레임워크 재사용 정보 관리 방안

이상돈(Sang-Don Lee),최한석(Han-Suk Choi),김근홍(Geun-Hong Kim),양영종(Young-Jong Yang) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.2Ⅰ

객체지향 응용 프레임워크는 거의 완성된 형태의 응용 프로그램으로서 프로그램 코드는 물론 디자인 패턴등의 설계정보의 대한 재사용을 지원한다. 본 논문에서는 응용 프레임워크의 재사용을 효과적으로 지원하기 위해 프레임워크 클래스계층 구조 및 클래스간 상호 작용 정보를 유기적으로 관리하고 적절한 프레임워크의 선택/검색을 가능하게 하는 프레임워크 재사용 정보의 관리기법에 대해 기술한다. 프레임워크의 효과적인 재사용을 지원하기 위한 저장소의 요구조건 및 정보표현 방안을 기술하고 제공 기능 및 시스템 구조에 대한 설계 내용을 제시하였다.

다원주 군파일의 침식방지효과에 관한 실험적 연구

이상화(Lee, Sang-Hwa),장은철(Jang, Eun-Cheul),이한승(Lee, Han-Seung),정석재(Jeong, Seok-Jae) 한국해안해양공학회 2011 한국해안해양공학회 논문집 Vol.23 No.2

연안역 파랑제어 구조물의 설계와 연안역 관리에 있어서 안전성문제 뿐만 아니라 환경문제는 가장 중요한 요인 중 하나이다. 본 연구에서는 파랑을 효율적으로 제어할 뿐만 아니라 연안역 보존에도 유리한 구조물로써 다원주 군파일을 제안하였다. 이 구조물의 침식방지효과를 파악하기위하여 수리모형실험을 수행하였다. 본 연구에서는 콘크리트를 사용한 기존의 파제제와 다원주 군파일을 이용한 구조물을 동일 평면배치 상에 두고 실험을 하여 침식방지효과를 분석하였다. 다원주 군파일 구조물을 설치했을 경우 구조물 양끝단에서의 침식현상은 줄어들었으며, 구조물 배후의 퇴적경향은 뚜렷하게 나타남을 확인할 수 있었다. Environmental and safety problems are one of the most important factors in designing coastal wave control structures and maintaining facilities in coastal zone. This study suggests the multi-cylinder piles as a profitable structure for preserving coastal zone as well as controlling the wave effectively. The hydraulic model experiment was performed to investigate the effect of erosion control of the structure. The experimental study was carried out to research the effect of erosion control in the coastal zone for existing a concrete wave breaker and the structure with multi-cylinder piles placing at the same location. As a result multi-cylinder piles reduced erosion at each sides of structure and occured sedimetation at front of structure.

[화학] 동시화 형광분광법에 의한 fluorene과 anthracene의 동시정량

이상학(Sang Hak Lee),한영지(Yung Ji Han),손범목(Bum Mok Son),최종하(Jong Ha Choi),김창진(Chang Jin Kim) 한국분석과학회 2002 분석과학 Vol.15 No.5

Bone hook을 이용한 장기간 지속된 악관절 탈구의 치험 2례

이상한(Sang Han Lee),김진수(Chin Soo Kim),장현주(Hyun Jung Jang),권귀영(Gui Yeong Kwon),이원필(Won Pil Lee) 대한구강악안면외과학회 1989 대한구강악안면외과학회지 Vol.15 No.1

This is a report of 2 cases about 39-& 58-year-old female patients with chronic painful forward mandibular condylar dislocation, which is non amenable to hand manipulation. Chronic mandibular dislocation can became exquiitely painful for the patient and frustrating to both the patient and the doctor. Clinically the forward dislocation of the TMJ can be divided into 3 groups; a dislocation occuring only once, a recurrent dislocation and a prolonged dislocation. The prolonged or long-standing dislocation has its own special problems. Manual reposition is not possible anymore in most cases. As the time between onset of the dislocation and reposition increases, the prognosis diminishes. The methods of the treatment for the dislocated mandible mainly used are closed(manipulation or traction) or open(condylectomy, eminectomy and several types of osteotomy, etc.) reduction. In these cases, authors treated successfully 2 female patients of longstanding forward TMJ dislocation as below. Case Ⅰ : manipulation using bone hook under general andesthesia as a closed repositioning method. Case Ⅱ : high condylectomies via preauricular approach as a open reduction after the failure of the reduction with bone hook.

양극산화에 의한 티타늄 산화막의 표면 특성 및 생체 활성에 관한 연구

이상한,조인호,Lee, Sang-Han,Cho, In-Ho 대한치과보철학회 2007 대한치과보철학회지 Vol.45 No.1

Statement of problem: Recently, anodic oxidation of cp-titanium is a popular method for treatment of titanium implant surfaces. It is a relatively easy process, and the thickness, structure, composition, and the microstructure of the oxide layer can be variably modified. Moreover the biological properties of the oxide layer can be controlled. Purpose: In this study, the roughness, microstructure, crystal structure of the variously treated groups (current, voltage, frequency, electrolyte, thermal treatment) were evaluated. And the specimens were soaked in simulated body fluid (SBF) to evaluate the effects of the surface characteristics and the oxide layers on the bioactivity of the specimens which were directly related to bone formation and integration. Materials and methods: Surface treatments consisted of either anodization or anodization followed thermal treatment. Specimens were divided into seven groups, depending on their anodizing treatment conditions: constant current mode (350V for group 2), constant voltage mode (155V for group 3), 60 Hz pulse series (230V for group 4, 300V for group 5), and 1000 Hz pulse series (400V for group 6, 460V for group 7). Non-treated native surfaces were used as controls (group 1). In addition, for the purpose of evaluating the effects of thermal treatment, each group was heat treated by elevating the temperature by $5^{\circ}C$ per minute until $600^{\circ}C$ for 1 hour, and then bench cured. Using scanning electron microscope (SEM), porous oxide layers were observed on treated surfaces. The crystal structures and phases of titania were identified by thin-film x-ray diffractmeter (TF-XRD). Atomic force microscope (AFM) was used for roughness measurement (Sa, Sq). To evaluate bioactivity of modified titanium surfaces, each group was soaked in SBF for 168 hours (1 week), and then changed surface characteristics were analyzed by SEM and TF-XRD. Results: On basis of our findings, we concluded the following results. 1. Most groups showed morphologically porous structures. Except group 2, all groups showed fine to coarse convex structures, and the groups with superior quantity of oxide products showed superior morphology. 2. As a result of combined anodization and thermal treatment, there were no effects on composition of crystalline structure. But, heat treatment influenced the quantity of formation of the oxide products (rutile / anatase). 3. Roughness decreased in the order of groups 7,5,2,3,6,4,1 and there was statistical difference between group 7 and the others (p<0.05), but group 7 did not show any bioactivity within a week. 4. In groups that implanted ions (Ca/P) on the oxide layer through current and voltage control, showed superior morphology, and oxide products, but did not express any bioactivity within a week. 5. In group 3, the oxide layer was uniformly organized with rutile, with almost no titanium peak. And there were abnormally more [101] orientations of rutile crystalline structure, and bonelike apatite formation could be seen around these crystalline structures. Conclusion: As a result of control of various factors in anodization (current, voltage, frequency, electrolytes, thermal treatment), the surface morphology, micro-porosity, the 2nd phase formation, crystalline structure, thickness of the oxide layer could be modified. And even more, the bioactivity of the specimens in vitro could be induced. Thus anodic oxidation can be considered as an excellent surface treatment method that will able to not only control the physical properties but enhance the biological characteristics of the oxide layer. Furthermore, it is recommended in near future animal research to prove these results.

증예보고 : Le Fort 1 Osteotomy 를 이용한 상악골 부정 유합의 치험례

이상한(Sang Han Lee),장현중(Hyun Jung Jang),박주영(Joo Young Park),김상호(Sang Ho Kim),변종수(Chong Soo Byun),김진수(Jin Soo Kim) 대한악안면성형재건외과학회 1985 Maxillofacial Plastic Reconstructive Surgery Vol.7 No.1

This is to report a case of surgical correction for malocclusion due to malunion of fractured maxilla. The results were as follow; 1. The cause of malocclusion was malunion of fractured maxilla. 2. The natural occlusion was rehabilitated when the Le fort 1 osteotomy had been carried out. 3. The segment of maxilla was fixed by use of interosseous wiring. 4. The bone graft was not performed at bilateral posterior to maxillary tuberosity.

Sisomicin 생산균의 돌연변이와 고생산 균주의 선별방법

이상한(Sang Han Lee),안병우(Byung Woo Ahn),신철수(Chul Soo Shin) 한국미생물생명공학회 1986 한국미생물·생명공학회지 Vol.14 No.4