PURPOSES : This study analyzes the estimated traffic volumes on roads and railways based on econometrics. METHODS : The accuracy of traffic forecasting was analyzed based on the average difference between predicted and actual values. This study distinguishes itself from existing literature by conducting a comparative analysis categorized by project type. In this study, econometric analyses, including bias and efficiency evaluation, were conducted for 308 projects in Korea. RESULTS : We conducted econometric analysis by dividing the data into project types. This study examines the accuracy of estimates in South Korea's road and railway projects concerning various factors, including project types (mobility-focused or accessibility-focused), implementing agencies, and the performance of preliminary feasibility studies. Notably, it identifies a tendency for overestimation, particularly in railway projects and mobility-focused road projects, such as expressways and national highways, as well as in projects executed by local governments. The mean percentage error (MPE) for the analyzed projects was -46.62%, indicating a significant overestimation bias with resulting inefficiencies. However, our analysis revealed that road projects, particularly those accompanied by preliminary feasibility studies and implemented by the central government, exhibited reduced bias and improved efficiency. The presence or absence of preliminary feasibility studies significantly influenced estimation bias. Interestingly, even when preliminary feasibility studies are conducted, the choice of the implementing agency remains a crucial factor affecting estimation bias. In addition, railway projects continue to demonstrate a notable overestimation bias, warranting further attention. CONCLUSIONS : Considering bias, efficiency, and MPE is advisable when forecasting traffic.

최근 중소기업 혁신 지원 전략이 시장 중심의 혁신을 유도하는 방향으로 전환 되면서 중소기업이 수행하는 정부 R&D의 세부과제 지원 유형 중 자유공모형 과제의 비중이 높아지고 있다. 본 연구는 이처럼 증가하고 있는 자유공모형 과제의 특성과 효과성에 대해 이론적으로 살펴보고 실증분석을 통해 어떤 조건에서 자유공모형 과제가 될 가능성이 높아 지는지, 성과 측면에서는 어떠한 차이점이 있는지 알아보았다. 먼저 시장수요 중심으로의 국 가 R&D전략 전환과 수요견인 혁신 관점에서 세부과제 지원 유형 중 자유공모형 과제의 특 성과 의미에 대해 살펴보고, 자원기반 관점으로 자유공모형 과제가 성과측면에서 유리할 수 있다는 것을 이해하였다. 그 후 로짓분석과 성향점수매칭법 등 실증분석을 통해 자유공모형 과제가 될 확률이 높아지는 과제 특성과 수행기업의 특성을 밝히고, 자유공모형 과제가 연구 비 1억원 당 더 많은 혁신 성과를 나타낸다는 결과를 얻었다.

Recently, PPP (Public-Private-Partnership) Projects, which private companies invest in, plan, design, construct and operate, have become more popular around the world. The construction industry environment is becoming increasingly competitive. The PPP project is composed of various organizations, so it is very difficult to carry out the project successfully. In this environment, the construction companies are trying hard to secure a competitive advantage. In this study, we tried to identify the role of project manager’s leadership and project citizenship behavior as a precedent for creating performance in PPP (Private-Public-Partnership) project. We examine the impact of PM’s transformational leadership and transactional leadership on project citizen behavior and examine the impact of project citizen action on project management performance and completion performance. For this study, we conducted a questionnaire survey on PPP project participants. As a result, the following results were obtained. First, transformational leadership and transactional leadership had a significant influence on project citizenship behavior. Second, project citizen behavior had a significant impact on both project management performance and project completion performance. The idealized influence of transformational leadership and the Active management by exception of transactional leadership were found to be very important in shaping PPP team’s project citizenship behavior. Therefore, this study has academic implications in studying the effects of PM leadership and project citizenship behavior on the performance of PPP project. And it is expected that it will help selection and training of PM to secure a competitive advantage for construction companies that implement PPP projects practically.

PURPOSES: The purpose of this study is to analyze the characteristics of the weight values of evaluation items by traffic safety project type. METHODS: In general, a large-scale investment in projects such as the traffic safety project requires economic analyses to be performed in advance. However, there is an argument for considering special characteristics of the traffic safety project. Therefore, this study conducted characteristic analysis of the weight values of evaluation items. The analysis consisted of two steps. The first step was hypothesis verification using analysis of variance (ANOVA). In this process, the authors examined whether the weight of evaluation items is the same regardless of the traffic safety project type. Based on the first step's results, the authors proceeded to the second step. The objective of this step was to analyze how different the weight values are by traffic safety project type using an analytic hierarchy process. RESULTS: According to the ANOVA test results, the benefit to cost ratios have different weight values based on traffic safety project type at the 0.01 significance level. The policy evaluation items, such as the plans connection, resident opinion, and regional equity, also showed the same results except that the result for the related plans connection was statistically significant at the 0.05 level. Based on the first step's result, the AHP analysis in the second step showed that the traffic safety projects for vulnerable users and pedestrians have very low weight values in economic evaluation factors compared with other safety project types. The weight values for vulnerable users and pedestrians were 0.29 and 0.26, respectively, in economic evaluation items. On the other hand, the weight values for other safety project types were around 0.6. Among the policy evaluation items, resident opinion showed a higher weight value than other factors, such as connection and regional equity items. CONCLUSIONS: The social and economic impact of a traffic safety project varies by project type and project characteristics. Although the economic approach is overarching and a reasonable methodology is applied for large-scale projects, it should be noted that the safety issue, especially for transportation of vulnerable uses, requires a non-economical approach. Based on the analysis results, this study suggests that the priority of the projects should be determined by separating them into independent assessment groups depending on their characteristics.

본 연구에서는 2010년부터 2013년까지 4년간 연안개발사업에 따른 일반해역이용협의서 133건을 분석하여 사업유형별 해양환경영향평가 개선방안을 제시하였다. 침식방지사업은 정확한 침식원인 분석이 선행되어야 하고 주변 해안의 상태와 구조물 설치 시 추가적인 문제점 발생 가능성에 대해 정확히 예측해야 하며, 사업시행 후 사후모니터링을 통한 침식방지 효과를 입증하는 체계적인 시스템이 마련되어야 한다. 호안 및 해안도로 건설사업의 경우, 무분별한 해안도로의 건설은 지양하고 구조물 안정성을 충분히 검토하여야 하며 반사파 증가에 따른 해안침식의 문제점을 함께 검토해야 한다. 그리고 침수방지 사업은 평가항목에 파랑을 선정할 필요가 있고 이상 파랑의 영향을 함께 고려해야 한다. 친수공간 조성사업은 종합적이고 체계적인 공간계획이 수립되어야 하고, 자연환경을 최대한 보전하고 자연과 융화될 수 있는 개발이 될 수 있도록 검토를 강화해야 할 것이다. 아울러 연안개발사업과 관련하여 많은 문제점이 내재되어 있어 법 제도적 측면에서의 지원과 함께 추후 해역별, 사업별 특성이 다양하게 반영된 추가적인 연구가 필요할 것으로 판단된다.

볼륨 타입의 컬러 홀로그래픽 스테레오그램을 디지털 방식으로 제작하기 위해 광학 시스템에 대해 연구하였다. 필름으로 노광하는 기존의 과정과 비교해 간략화하고 자동화된 볼륨 컬러 홀로그램의 제작을 위해 DLP 프로젝트를 도입하여 광학시스템을 디자인했다. DLP 프로젝트를 이용하여 시차 이미지를 확산판에 투영하고 물체광을 생성시켰다. 참조광은 유제면의 반대 방향으로 입사시켜 간섭무늬를 만들었다. 시차이미지는 색분해 하여 Red, Green, Blue의 색 성분으로 만들어 공간에서 분할하는 기록 방법으로 컬러 홀로그래픽 스테레오그램을 제작했다. 660nm, 532nm, 457nm의 파장을 지닌 세 대의 레이저 광원을 사용해 컬러 홀로그래픽 스테레오그램을 2단계로 나누어 기록했다. 마스터 홀로그램에서 공액 재생법으로 실상을 재생시켜 리프만 홀로그램 타입으로 제작하였다. 제안하는 디지털 방식의 광학 시스템으로 볼륨 타입의 컬러 홀로그래픽 스테레오그램을 실현 가능하다는 것을 확인하였다.

소프트왜어 산업진흥볍 개정으로，공공부문 정보화 시장에 대기업 사업 참여가 제한되고 중소기업의 사업 참여가 증가될 것으로 예상된다. 이에 중소기업의 프로젝트 통합관리 및 소프트혜어 품질관리의 취약 부분을 보완하기 위한 조처로 PMO 제도를 법제화 하여，제도적，조직적 프로젝트관리를 통한 IS프로젝트의 성과를 향상을 하려는 것이다. IS 프로젝트 관리영역에 관련된 PMO에 대한 이론적 연구와 PMBOK 9 개 관리영역 중 3 개 핵심관리 영역 연관성 분석을 통해 PMO 업무 핵심 관리능력인 PMO 기능을 정의하였다. 또한 프로젝트 성과 및 영향 요인은 이론적 연구를 통해 성과 영향 요소 및 성과요소를 정의하였다. 제시한 연구모델의 실증적 검증은 공공부분 발주자，사업수행자，감리원을 대상으로 설문조사를 통하여 프로젝트의 성과 향상에 영향을 주는 PMO 활동의 기능 및 PMO운영 형태 상호관계를 실증적으로 검증하고자 연구모델을 수립한다.

This study aims at analyzing of residents'attitudes and spatial structures in the rural villages reconstructed by the Rural Village Improvement Project(type A), and suggesting the guiding directions for planning rural villages. Six rural villages located in KyungGi province were selected for case study. The Major findings can be summarized as follows : 1) The ratio of type A project(newly planned village) in the total cases of the Rural Village Improvement Project has increased since 1990, In the majority(91.2%) of the type A project, the project area is below 2 ha and density of dwelling unit is below 40 households/ha. 2) The three spatial structures of newly planned rural village, i.e., Loop pattern, Cul-de-sac pattern, and Dendritic pattern, are identified. And the barns in the newly-build houses are categorized into the five types : the vertical addition type, the horizontal addition type, the vertical- horizontal addition type, the no- barn type, and the reused -barn type. 3) In the newly planned rural villages, the level of satisfactions for the quality of house and water & sewer system is remarkably higher than in the existing rural villages. These are the positive effects caused by the Rural Village Improvement Project. 4) The majority of the villagers think the improvement of the existing rural village, instead of redevelopment or newly planned village, is most desirable, which means the improvement of houses, roads, and sanitary facilities while preserving the spatial structures of the existing village.