• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2001년도 춘계학술대회 논문집
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• pp.15-19
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• 2001

This paper describes effectiveness and characteristics of 3 P(point) task analysis as a new Ergonomic and Kansei design method for extracting user demand especially. The key point in 3 P task analysis is to describe the flow of tasks and extract any problems in each task. A solution of a problem means a user demand. 3 P task analysis cal eliminate an oversight of check items by examining the users' information processing level. The suers' information processing level was divided into the following three stages for problem extraction: acquirement of information ---> understanding and judgment ---> operation. Three stages has fourteenth cues such as difficulty of seeing, no emphasis, mapping for extracting problems. To link analysis results to the formulation of a product concept. I added a column on the right side of the table for writing the requirements (user demand) to resolve the problems extracted from each task. The requirements are extracted by using seventh cues. Finally 3 P task analysis was compared with group interview to make the characteristics of 3 P task analysis, especially extracting user demand, clear.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 A
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• pp.165-167
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• 2004

End-user electric power consumption trends shows various load curves dependant on industry, contract, season, day and time. Analysis of end-user electric power consumption trends has a key role to efficiently meet electricity demand. There are several factors of change in electricity demand such as the change of weather, international conflict, and industrial trends during summer. This paper has analyzed the analysis the end-user electric power consumption trends using the load curve during international conflict. We observed that international conflict decreased electric demand by $5.4\%$. This increase is not significant, and therefore we conclude that the international conflict has not greatly affected Korea's electricity demands. This paper provides useful information so as to mon: efficiently perform demand side management.

• 한국비블리아학회지
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• 제14권1호
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• pp.91-106
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• 2003

본 연구는 신학대학도서관에서의 이용자 요구와 도서관의 수용을 비교 분석함으로써 도서관운영의 기초자료를 제공하고, 이용자 만족도가 높은 도서관운영에 그 목적이 있다. 이를 위해 8개 신학대학도서관의 홈페이지 전자게시판에 1년 동안 게시된 이용자의 글을 도서관 업무와 관련하여 9개 범주로 나누어 분석하였다. 그 결과 이용자 요구는 대출 및 열람범주가, 도서관수용은 전자자료 범주가 가장 많았고, 서비스개선으로의 수용유형이 가장 높게 나타났다. 수용율 49.6%를 70∼80% 수준으로 끌어올릴 수 있는 다양한 채널 개발과 적극적이고 개방적인 수용자세가 요구된다.

• 한국도로학회논문집
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• 제18권3호
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• pp.47-57
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• 2016

PURPOSES : This study aims to examine the differences between the existing traffic demand forecasting method and the traffic demand forecasting method considering future regional development plans and new road construction and expansion plans using a four-step traffic demand forecast for a more objective and sophisticated national highway maintenance. This study ultimately aims to present future pavement deterioration and budget forecasting planning based on the examination. METHODS : This study used the latest data offered by the Korea Transport Data Base (KTDB) as the basic data for demand forecast. The analysis scope was set using the Daejeon Metropolitan City's O/D and network data. This study used a traffic demand program called TransCad, and performed a traffic assignment by vehicle type through the application of a user equilibrium-based multi-class assignment technique. This study forecasted future traffic demand by verifying whether or not a realistic traffic pattern was expressed similarly by undertaking a calibration process. This study performed a life cycle cost analysis based on traffic using the forecasted future demand or existing past pattern, or by assuming the constant traffic demand. The maintenance criteria were decided according to equivalent single axle loads (ESAL). The maintenance period in the concerned section was calculated in this study. This study also computed the maintenance costs using a construction method by applying the maintenance criteria considering the ESAL. The road user costs were calculated by using the user cost calculation logic applied to the Korean Pavement Management System, which is the existing study outcome. RESULTS : This study ascertained that the increase and decrease of traffic occurred in the concerned section according to the future development plans. Furthermore, there were differences from demand forecasting that did not consider the development plans. Realistic and accurate demand forecasting supported an optimized decision making that efficiently assigns maintenance costs, and can be used as very important basic information for maintenance decision making. CONCLUSIONS : Therefore, decision making for a more efficient and sophisticated road management than the method assuming future traffic can be expected to be the same as the existing pattern or steady traffic demand. The reflection of a reliable forecasting of the future traffic demand to life cycle cost analysis (LCCA) can be a very vital factor because many studies are generally performed without considering the future traffic demand or with an analysis through setting a scenario upon LCCA within a pavement management system.

• 한국항행학회논문지
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• 제12권5호
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• pp.509-515
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• 2008

사용자의 요구에 대한 명확한 요구분석은 성공적인 소프트웨어 개발의 필수 요건이다. 그리하여, 개발될 소프트웨어 구성에 큰 영향용 준다. 기존의 많은 소프트웨어들이 인터넷의 급격한 발전과 함께 웹 기반으로 변화 되었다. 웹 애플리케이션이 복잡해지고 사용자의 요구가 증가되면서 많은 비용과 인력이 개발에 소요되고 있다. 그러나 아직까지 웹 애플리케이션에 대한 정확한 개발환경의 정의가 잘 되어있지 않다. 개발에 있어서도 사용자의 요구사항을 반영하지 못하여 사용자가 자유롭게 정보에 접근하는 기능의 설계가 어렵게 되었다. 본 논문에서는 소프트웨어 요구분석 프로세스를 수정하고, 요구사항을 분석하여 식별할 수 있는 방법을 제안하였다.

• 한국인공지능학회지
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• 제10권1호
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• pp.27-32
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• 2022

As the need for eco-friendly transportation increases due to the deepening climate crisis, many local governments in Korea are introducing shared bicycles. Due to anxiety about public transportation after COVID-19, bicycles have firmly established themselves as the axis of daily transportation. The use of shared bicycles is spread, and the demand for bicycles is increasing by rental offices, but there are operational and management difficulties because the demand is managed under a limited budget. And unfortunately, user behavior results in a spatial imbalance of the bike inventory over time. So, in order to easily operate the maintenance of shared bicycles in Seoul, bicycles should be prepared in large quantities at a time of high demand and withdrawn at a low time. Therefore, in this study, by using machine learning, the linear regression algorithm and MS Azure ML are used to predict and analyze when demand is high. As a result of the analysis, the demand for bicycles in 2018 is on the rise compared to 2017, and the demand is lower in winter than in spring, summer, and fall. It can be judged that this linear regression-based prediction can reduce maintenance and management costs in a shared society and increase user convenience. In a further study, we will focus on shared bike routes by using GPS tracking systems. Through the data found, the route used by most people will be analyzed to derive the optimal route when installing a bicycle-only road.

• 한국경영과학회지
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• 제34권1호
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• pp.61-83
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• 2009

This study developed a variable demand traffic assignment model by stable dynamics. Stable dynamics, suggested by Nesterov and do Palma[19], is a new model which describes and provides a stable state of congestion in urban transportation networks. In comparison with the user equilibrium model, which is based on the arc travel time function in analyzing transportation networks, stable dynamics requires few parameters and is coincident with intuitions and observations on congestion. It is therefore expected to be a useful analysis tool for transportation planners. In this study, we generalize the stable dynamics into the model with variable demands. We suggest a three stage optimization model. In the first stage, we introduce critical travel times and dummy links and determine variable demands and link flows by applying an optimization problem to an extended network with the dummy links. Then we determine link travel times and path flows in the following stages. We present a numerical example of the application of the model to a given network.

• 대한산업공학회지
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• 제13권2호
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• pp.65-77
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• 1987

Congestion occurs whenever users interfere with each other, while competing for scarce resources. In a congested market, such as a telecommunication service market, users of telecommunication services incur costs in using the service in addition to the price. The user's own time costs involved in learning to use the service, waiting for the service, and making use of the service are typically greater than the price of telecommunication services. A market equilibrium analysis is performed in which a method for user demand aggregation is developed. The effects of price changes on user demands and market demands for congested services are examined. It is found that total market demands may increase as the price for less-congested services increase under certain demand conditions. This suggests that a nonuniform pricing scheme for a congested service may improve the utilization of the congested system. The sign of price cross-elasticity for congested services is show to vary with demand conditions. A possible complementary property of congested services is found and the implication of such a property is discussed. It is argued that such a complementary property may lead to a cross subsidy in a market with congestion. Finally, comparisons between uniform pricing and nonuniform pricing policies are made. A specific numerical example is given to show that a nonuniform pricing policy may be Pareto superior to a uniform pricing policy.

• 대한교통학회지
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• 제19권1호
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• pp.89-99
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• 2001

기존의 고정수요(Fixed Demand)를 전제로 한 가로망 설계 모형에서는 가로망의 구조나 용량이 개선되더라도 장래 기·종점 통행수요는 변하지 않는다고 가정한다. 이는 단기적인 가로망 설계에서는 성립할 수 있지만, 현실적으로 기·종점 통행수요는 네트워크 서비스수준에 따라 변화하므로 고정수요를 전제한 장기적인 가로망 설계문제에서는 그 타당성을 잃어버린다 그러므로 장래 최적 가로망 설계는 현실적 여건과 교통특성상 기·종점 통행 수요가 모형 내부에서 결정되는 내생변수로 처리하는 가변수요(Variable Demand)를 반영한 가로망 설계 문제로 모형을 구축하는 것이 바람직하다. 이러한 맥락에서 본 논문은 가변수요를 갖는 가로망 설계문제에 대한 이중계층 모형을 구축한 다음, 가로망내의 특성치가 변화하였을 때 그 파급영향을 먼저 파악하고 현 가로망 개선에서 가장 먼저 고려해야 할 링크를 찾아내기 위해 민감도 분석을 수행하였고, 민감도 분석과 연관되어 전체 시스템 효과척도를 최적화할 수 있는 대안적인 알고리즘을 제시하고 적용하여 구축된 모형으로 그 유효성을 검증하였고, 기존 고정수요 가로망 설계기법에 내재된 한계점을 극복하고자 하였다.

• 한국비블리아학회지
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• 제17권2호
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• pp.239-259
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• 2006

본 연구의 목적은 중앙 행정기관 자료실이 이용자에게 보다 효율적인 웹기반 정보서비스를 제공하기 위한 방안을 제시하기 위한 것이다. 그러기 위하여 국내 중앙행정부처 18개 기관 자료실을 대상으로 '전용 홈페이지 구축 기관'과 '전용 홈페이지 미구축 기관'으로 나누어 이용자의 요구사항이 어떻게 다른지를 분석하였다. 그 결과 '전용 홈페이지 구축 기관'은 홈페이지 홍보, 홈페이지 이용률 향상을 위한 교육프로그램 제공 다양한 홈페이지 서비스를 위한 시스템 유틸리티 개선이 필요한 것으로 나타났으며. '미구축 기관'은 강력한 검색기능, 다양한 컨텐츠, 질 높은 정보서비스를 받을 수 있는 홈페이지 구축이 필요하다는 이용자의 요구가 있었다.