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CO/HC 가스 인식을 위한 소형 전자코 시스템의 제작 및 특성
홍형기,권철한,윤동현,김승렬,이규정,김인수,성영권 ( Hyung Ki Hong,Chul Han Kwon,Dong Hyun Yun,Seung Ryeol Kim,Kyu Chung Lee,In Soo Kim,Yung Kwon Sung ) 한국센서학회 1997 센서학회지 Vol.6 No.6
system has been fabricated and characterized using an oxide semiconductor gas sensor array and pattern recognition techniques such as principal component analysis and back-propagation artificial neural network. The sensor array consists of six thick-film gas sensors whose sensing layers are Pd-doped WO₃, Pt-doped SnO₂, TiO₂-Sb₂O_5$gt;-Pd-doped SnO₂, TiO₂-Sb₂O_5-Pd-doped SnO₂ Pd coated layer, Al₂O₃-doped ZnO and PdCl₂-doped SnO₂. The portable electronic nose system consists of an l6bit Intel 80c196kc as CPU, an EPROM for storing system main program, an EEPROM for containing optimized connection weights of artificial neural network, an LCD for displaying gas concentrations. As an application the system has been used to identify 26 carbon monoxide/hydrocarbon (CO/HC) car exhausting gases in the concentration range of CO 0%/HC 0 ppm to CO 7.6%/HC 400 ppm and the identification has been successfully demonstrated.
송상철 ( Sang-chul Song ),홍지원 ( Jiwon Hong ),김상욱 ( Sang-wook Kim ) 한국정보처리학회 2016 한국정보처리학회 학술대회논문집 Vol.23 No.1
트위터 이용자 수 증가로 인해, 유저의 타임라인에 하루 새롭게 기재되는 트윗 수가 급증하는 정보 과다 현상이 중요한 이슈로 자리 잡은 지 오래다. 이에 본 논문은 이고-네트워크 정보를 바탕으로 학습 된 분류 시스템을 이용해 각각의 이고 유저마다 트윗 추천에 유리한 추천 방식을 예측하고, 이를 기반으로 선호할만한 트윗을 우선적으로 선별해주는 그래프 기반 트윗 추천 시스템을 제안한다. 실험을 통하여 단일한 추천 방식보다, 최고 11.5% 추천 정확도 성능이 향상함을 확인하였다.
홍민선(Min-Sun Hong),임석철(Suk-Chul Rim),노승종(Seung J. Noh) 한국경영과학회 2008 韓國經營科學會誌 Vol.33 No.1
Make-to-order manufacturers with multiple plants at multiple sites need to have the ability to quickly determine which plant will produce which customer order to meet the due date and minimize the transportation cost from the plants to the customer. Balancing the work loads and minimizing setups and make-span are also of great concern. Solving such scheduling problems usually takes a long time. We propose a new approach, which we call ‘preprocessing', for resolving such complex problems. In preprocessing scheme, a ‘good' a priori schedule is prepared and maintained using unconfirmed order information. Upon the confirmation of orders, the preprocessed schedule is quickly modified to obtain the final schedule. We present a preprocessing solution algorithm for multi-site constraint scheduling problem (MSCSP) using genetic algorithm;and conduct computational experiments to evaluate the performance of the algorithm.
정상 한국 성인에서 발목관절 외측 안정성의 방사선학적 계측
손현철,김용민,김동수,최의성,박경진,조병기,박지강,홍경호,Shon, Hyun-Chul,Kim, Yong-Min,Kim, Dong-Soo,Choi, Eui-Sung,Park, Kyoung-Jin,Cho, Byung-Ki,Park, Ji-Kang,Hong, Kyung-Ho 대한족부족관절학회 2010 대한족부족관절학회지 Vol.14 No.1
Purpose: Anterior drawer and varus stress test are commonly used for radiologic evaluation of chronic lateral ankle instability. However, there are controversies regarding the method of measurement and the normal value. This study was performed to investigate radiologic normal values in normal Korean adults and to analyze differences by age and gender. Materials and Methods: Sixty Korean adults were recruited and divided in three groups (20 in their twenties, 20 in their thirties, 20 in their forties). There were 10 males and 10 females in each group. The selection criteria were no history of ankle injury and no evidence of instability on physical examination. Radiologic measurement of varus talar tilt and anterior talar translation were performed through anterior and varus stress radiographs using Telos device (150N force). The measurement was repeated twice by three researchers, and intraobserver reproducibility and interobserver reliability were analyzed. The average talar tilt and anterior talar translation were obtained. Results: Talar tilt and anterior talar translation on ankle stress radiographs had good intraobserver reproducibility and interobserver reliability. Talar tilt was average $3.7^{\circ}$ and $5.1^{\circ}$ in male and female of twenties of age, $3.9^{\circ}$ and $4.8^{\circ}$ in their thirties, $3.4^{\circ}$ and $4.5^{\circ}$ in their forties. Anterior talar translation was average 3.5 mm and 4.2 mm in their twenties, 4.1 mm and 3.8 mm in their thirties, 3.6 mm and 4.1 mm in their forties. There was no significant difference in talar tilt and anterior talar translation by age. However, there was significant difference in talar tilt by gender. Conclusion: Normal range of talar tilt angle in Korean adults was below $8.3^{\circ}$, and normal range of anterior talar translation was below 7.6 mm. It seems to be able to serve as a good reference for radiologic evaluation and for treatment of chronic lateral ankle instability.