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아시안하이웨이 6번 노선의 국제여객 교통수단선택에 관한 연구
이백진,이세홍,이윤석,이덕환,Lee, Back Jin,Lee, Se Hong,Lee, Yun Seok,Lee, Deok Hwan 대한토목학회 2015 대한토목학회논문집 Vol.35 No.4
본 연구는 남북한간 교류협력 증진과 국제협력사업 활성화에 따라 향후 동북아 차원에서 연계가 예상되는 아시안하이웨이 6번노선(간성-선봉)의 이용을 가정하고, 현존하지 않는 북한 육로망 연계에 따른 한반도 주변의 국제여객수송 행태 변화를 분석하였다. 이를 위해 SP(Stated Preference), RP(Revealed Preference) 자료를 기반으로 다항로짓(ML)과 네스티드로짓(NL) 모형을 구축하였다. NL모형을 통해 분석한 결과, 현재 한중(동북부), 한러(극동러시아)간 국제여객수송 대부분이 육상로 단절로 인해 항공을 통해 이루어지나, AH6노선이 구축될 경우에는 약 90%이상이 육상운송으로 전환될 것으로 분석되었다. 또한, 여객수송거리가 길어질수록(903~1,631km) 국제철도의 수단분담률은 62.8%에서 66.1%로 증가하고, 이 때 도로수송은 29.6%에서 21.9%로 감소하는 것으로 나타났다. 반면, 항공수송은 육상수송과는 달리 수송 거리대별 증감경향이 뚜렷하게 나타나지 않고, 약 10% 수준의 수단분담률을 나타내는 것으로 추정되었다. By promoting the international transportation and the improvement of advanced exchange between South and North Korea, the Asian Highway plan was expected to make considerable economical effects in the North-East Asian region. This study focuses on a part of AH6 route (i.e., South Korea-North Korea-China-Far East Russia) and aims to analyze the behavioral change of international passenger transport around the Korean Peninsula by assuming the non-existent North Korea land transport network connectivity. The study was performed using two main methods. First, a stated preference survey was performed to derive the actual modal share of each travel mode. Second, a disaggregate analysis was performed to develop possible mode-choice models for international passenger travel and find out the suitable choice. Based on the results of the model estimation, it is found that over 90% of the international passenger transport would be converted to land transport (rail+highway). In addition, international railroad modal share rate would be increased from 62.8% to 66.1% and international bus would be decreased from 29.6% to 21.9% as the distance lengthened (903km~1,631km).
계층적 구조 및 시 · 공간적 정보에 기반한 움직임 정보 예측 방법
이백두산(Baek Doo San Lee),오승준(Seung Jun Oh) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.1B
이 논문에서 계층적 구조 및 시 · 공간적으로 유사한 움직임 정보에 기반하여 움직임 벡터를 빠르게 예측할 수 있는 알고리즘을 제안한다. 움직임 정보를 빠르고 정확하게 예측하기 위해서, 같은 해상도의 영상에서 시 · 공간적 정보와, 하위 레벨의 영상에서 초기 움직임 정보 후보들로부터 초기 탐색 점을 결정한다. 이러한 방법을 통해서 얻은 초기 탐색점은 실제 움직임과 아주 유사하기 때문에 탐색 영역을 줄여서 전체적인 속도 향상을 갖기 위한 지역 탐색 알고리즘을 이용했다. 이 실험 결과는 본 논문에서 제안한 HST-BMA(Hierarchical Spatio-Temporal BMA) 방법이 FBMA(Full search Block Matching Algorithm)방법과 유사한 화질을 갖으면서도 로가리즘 탐색 수준의 예측 속도를 얻었다.
이백행(Baek-Haeng Lee),신동현(Dong-Hyun Shin),송현식(Hyun-Sik Song),김병우(Byeong-Woo Kim),김희준(Hee-Jun Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
There are lots of attempts in automotive field to supersede mechanical parts with electrical ones owing to increasing needs of drivers' safety, comfort and convenience as well as recent tightened environmental regulation. In addition, continuous improvements of semiconductor technology make it speed up to use electric components instead of conventional mechanical and hydraulic ones. In accordance with these tendencies, the demand of electric power and energy used in vehicle has been increasing steadily, and it will cause overburden of conventional 14V power generation and distribution system. A research on higher voltage system started in early 1990s and 42V power system has been introduced for a future automotive power-net. In this paper, technical trend in energy storage devices which implies one of the key technologies to implement 42V power-net is reviewed, and development results of the improved energy storage system consisted of ultracapacitor, battery and management controllers are presented.
교정전 하악전치부 분절골절단술 시행시 고려사항 및 그 유용성
이백수(Baek-Soo Lee),최현정(Hyun-Jung Choi),남광호(Kwang-Ho Nam),류동목(Dong-Mok Ryu) 대한구강악안면외과학회 2003 대한구강악안면외과학회지 Vol.29 No.1
Anterior set back segmental surgery has been used for shortening the period of orthodontic treatment in case of bimaxillary or maxillary protrusion. In most cases, it requires pre-operative orthodontic treatment. Through properly performed leveling and tooth aligning, the operative porcedure can be easier and post-operative occlusal stability can be increased. But it takes time for orthodontic treatment. Recently, we have been using anterior segmental surgery before orthodontic treatment and have reliable results from that. Therefore, we have to consider arch shape, curve of Spee, tooth selection to be extracted for obtaining of post-operative occlusal stability without pre-operative orthodontic treatment.
중소기업 근로자들의 직무스트레스 요인과 해소방법에 관한 고찰
이백현(Baek Hyun Lee),정수일(Soo Il Jung) 한국산업경영시스템학회 2008 한국산업경영시스템학회지 Vol.31 No.1
According to the statistic of industrial disaster in 2006 presented by the Ministry of Labor, there were 10,235 people with occupational diseases adding 2,740 more people (36.6%) compared to the previous year. Concerning the occupational diseases, 1,607 people had brain-cardiovascular diseases comprising more than 15% of all occupational diseases, and excessive workload and occupational stress seemed to play important parts. According to Korean Society of Occupational Stress, among 7,000 workers at 254 businesses in Korea, 73% of them were reported to be exposed to potential occupational stress and 22% of them were reported to be under severe stress. The increase of occupational stress among workers comes from excessive competition caused by business restructuring, promotion competition, annual salary system and so forth. Occupational stress threatens the heath and even the life of workers and lowers business competitiveness. Using the Korean occupational stress reduction model to the workers at small and medium businesses in Incheon area, therefore, the project intends to measure the level of stress among office workers and examine its relatedness to the VTD subjective symptoms. In addition, the project intends to present some methods to reduce occupational stress and increase business efficiency at work by studying and analyzing the various elements that workers use to reduce their occupational stress.