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李仁遠,朴魯峰,朴鍾日 弘益大學校 科學技術硏究所 2005 科學技術硏究論文集 Vol.16 No.-
The development in the information technology area has enabled drivers to use the ATIS (Advanced Traveller Information System) more easily by establishing ubiquitous environment where users may access the network at any place and time. The ATIS is the central part of the ITS (Intelligent Transportation System). The travel time of a transportation network at rush hours, however, has been calculated based on a simple proportional function between the traffic volume and travel time. This simplified method has been adopted in the trip assignment model for technical reasons resulting in the actual traffic flow at rush hours not being properly reflected. Therefore, it has fundamental limits in terms of the ever changing traffic conditions and short term prediction. In addition, the static trip assignment, which is mainly used in the trip assignment of traffic flow, does not allow any time-dependent changes. Under this assumption, the static trip assignment may predict relatively long-term average traffic flow, but cannot describe such characteristics as changing in a time-dependent manner. This assumption also supposes that the traffic flow has a uniform distribution in the applied area, which is regarded as another flaw of the static assignment method. As a result, various dynamic methods analyzing traffic conditions of a transportation network have been recently developed. Against this background, the objectives of this study are as follows: To develop HISIM (Hong Ik SIMulation) model, apply the travel time calculation formula developed based on the previous BPR formula and Queueing theory to this model, and present values and limits of each model by simulating in the imaginary network and comparatively analyzing its results.
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Development of Logit Type Model for the JOint Destination and Mode Choice Analysis
李仁遠 弘益大學校 1982 弘大論叢 Vol.14 No.2
交通네트워크를 設計할 경우 일반市民의 通行行能의 變化 즉 交通施設供給에 따른 交通需要의 變化分析이 항상 문제로 대두되고 있다. 特히 交通手段의 選擇行爲와 職住通行의 起終點 變化를 分析하기 위하여 Logit Model 등 여러가지 方法論이 제시되고 있으나 交通네트워크 設計시에 要求되고 있는 一貫性(Consistency)問題와 效率性(Efficiency)問題가 注意깊이 다루어지지 않고 있는 실정이다. 따라서 本論文은 交通의 서비스變數를 일관성있고 효율적으로 처리할 수 있는 同時的模型方法論(Joint choice Behavioral Model) 選定하여 우리나라에 適合한 效用函數式(Utility Function)과 파라메타 結定技法(Parameter Calibration Method)을 定立하였으며 실제적인 事例硏究를 통하여 開發된 模型論을 검증하고 地下鐵과 같은 都市交通 네트워크設計에 利用될 수 있는 實用的인 模型하나를 開發 提示하였다.
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이인원,이종원,정길호,Lee, ln Won,Lee, Chong Won,Jung, Gil Ho 대한토목학회 1993 대한토목학회논문집 Vol.13 No.5
자유도가 큰 구조물의 고유진동수와 모드를 구하기 위한 방법으로 Lanczos 방법과 분할 구조 해석법을 조합한 수치 해석법을 개발했다. 이 방법은 분할하지 않은 전체 구조물의 강성 행렬이나 질량 행렬을 구할 필요가 없고, 오직 분할 구조물의 강성 행렬과 질량 행렬만을 필요로 한다. 구조물을 유한 요소 해석법과 같은 수치 해석법을 사용할 때의 일반적인 가정, 즉 선형 탄성 구조물이라는 가정외에 어떤 다른 가정도 하지 않기 때문에 분할 구조로 나눈 경우와 나누지 않은 경우에 계산된 고유진동수와 모드가 동일하다. 또한, 행렬 연산시 분할 구조물의 강성 행렬과 질량 행렬만을 사용하기 때문에, 소형의 컴퓨터에서도 자유도가 큰 구조물을 해석해 낼 수 있다. 이것은 분할 구조물 각각을 여러명의 사람이 독립적으로 설계, 또는 해석한 결과를 조합하여 전체 구조물을 해석할 수 있음을 뜻한다. 이 방법의 수치 해석의 예로서, 헬리콥터 꼬리의 트러스 구조물을 사용하여 처음 10개의 고유진동수와 모드를 계산해 보였다. A modified Lanczos method combined with a substructure analysis technique was used for calculating natural frequencies and mode shapes of large structural systems. The method does not require generation and storage of stiffness and mass matrices of the entire structure. It only uses the stiffness and mass matrices of each substucture. No approximating assumptions are required other than the usual assumption of linear elastic system modelled by finite elements. Thus, natural frequencies and mode shapes for the finite element model employed are the same as those with or without the suhstructuring algorithm. To check the efficiency of the proposed method, first ten natural frequencies and the corresponding mode shapes of an open truss helicopter tail-boom structure are calculated by using it.
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이인원,김진철 한국식품위생안전성학회 1993 한국식품위생안전성학회지 Vol.8 No.2
Species of the genus Fusarium are worldwide in their distribution. They are saprophytes as soil inhabitants and parasites of cultivated plants. Some isolates of certain species car capable of producing mycotoxins. Mycotoxicoses, including moldy corn toxicosis, alimentary toxic aleukia, fusariotoxicosis, and rel mold disease are known to be associated with trichothecene-producing fungi. Historically severe epidemic of cereal scab occred in the southern part of Korea in 1963. The epidemic caused a social problem because of not only heavy economic losses but also mycotoxicoses to humans and farm animals. However the toxic principles were remained unknown until some publications in 1980's indicated that trichothecenes and zearalenone were major mycotoxins in Korea cereals contaminated with Fusarium moniliforme have been found to be associated with human and animal disease such as leukoencephalomalacia in horses, pulmonary edema in swine and esophageal cancer in humans. High concentrations of fumonisins have been detected in corn samples from high espohoageal cancer risk areas of South Africa and China. Thus fumonisins have been implicated in the etiolgy of human esophageal cancer in those high incidence countries. Recently increase of imported cereals from foreign countries demands to assess the safety of mycotoxins in Korea. The informations on the natural occurrence of mycotoxins are needed to solve the toxicological problems in humans and farm animals associated with the consumption of moldy cereals.
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李仁源,尹志善 청주대학교 산업과학연구소 1990 産業科學硏究 Vol.8 No.-
In the design of underground openings, initial stress as well as mechanical characteristics of rock masses must be determined. This paper attampt to determine initial stress from convergence measurment during construction. Rock properties determine from laboratory tests. The optimum excavation shape has been chosen by two-dimensional boundary element methods.
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李仁遠,丁浩濚 홍익대학교 과학기술연구소 2006 科學技術硏究論文集 Vol.17 No.-
As one of the most serious urban problems, routine city traffic congestion causes not only unpleasantness but also damage with increases of road tolls. Traffic congestions can be largely categorized into recurrent and non-recurrent congestions. With the appropriate management system, daily recurrent congestions may be greatly enhanced as the originating time, place, and cause of these congestion regular and can be dealt with beforehand. Recently, many TDM plans are being improved along with plans to more effectively utilize established facilities and maximize the effect. To achieve the purpose of congestion management through ramp metering and solve actual congestion problems, it is necessary to fully comprehend the traffic flow characteristics of the vehicle merging area and carry out studies on various practical plans of ramp control. Therefore, a practical ramp metering operation plan was developed in this study and applied to an actual road segment to assess its effect. The ramp metering model was applied on the through traffic volume of the main line's downstream to decide the optimal ramp metering rateand compare the before and after results of ramp metering to assess its' effects. From the metering results, it was concluded that ramp metering had a great effect on congestion management as there was an increase compared with the results before applying the metering on the through traffic volume of the main highway line segment.
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네트워크 거버넌스(Networked Governance)의 탐색적 분석: 서울특별시와 경상남도의 업무협약(MOU)을 중심으로
이인원 한국국정관리학회 2017 현대사회와 행정 Vol.27 No.1
지방자치단체의 경쟁력을 강화하기 위한 중요한 방안으로 보다 포괄적･통합적･지역적 (regional) 문제해결 방식에 기반한 행정체제 혹은 거버넌스 구조를 구축하는 방안에 대한 논의가 지속되고 있다. 이 연구는 현재 논의되고 있는 다양한 대안적 지역 거버넌스의 유형 중 정책 집행과 서비스전달 과정에서 발생하는 협력적 ‘네트워크 거버넌스(networked governance)’에 초점을 맞추었고 이중에서도 최근 지방정부가 협력사업을 추진하는 과정에서 빈번히 활용하고 있는 업무협약(MOU)을 ‘네트워크 거버넌스(networked governance)’의 대표적인 사례로 파악 하여 이를 분석하고자 하였다. 업무협약(MOU) 등과 같은 비공식적인 협력은 자발성･유연성･ 비공식성이 높아 다양한 이해당사자들의 전략과 상호작용의 동태성을 보다 명확하게 보여줄 수있을 것으로 기대하였다. 분석결과, 광역단위에서의 협력사업은 중앙정부의 비중이 크지 않고 공공부문과 민간부문이 교류･협력하는 다분히 수평적(horizontal)인 현상임을 확인할 수 있었 으며, 광역자치단체의 비중과 역할이 큰 것으로 나타났다. 그리고, 광역자치단체가 참여하지 않는 협력사업의 경우 기초자치단체의 독자적인 역할과 다른 기초자치단체와의 비연계성이 훨씬 뚜렷하게 나타났다.
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