• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 A
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• pp.386-388
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• 2002

The key objectives of this study are to develop the enhanced electricity system analysis methodologies and decision making process applicable to the analysis of the energy policies, especially the renewable energy policy, through surveying the recent trend and relevant study results. This study utilizes DECADES model, a comparative assessment tool developed by IAEA, and suggests a way to establish DECADES database required to make it applicable to Korean electricity system analysis. For this, a survey on the existing database of various organizations is performed. A case study on the economic and environmental impact of renewable energy is made using DECADES model.

• 디지털융복합연구
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• 제7권4호
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• pp.101-115
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• 2009

This paper aims to examine the impact of R&D organization culture(diversity, autonomy, redundancy and connectivity) to Organizational Commitment and Organizational Citizenship Behavior in Information Technology Companys. Hypotheses were tested by surveying 250 employees at R&D Gumi Industrial Complex. The findings of research are as follows : First, three factors of R&D organizational culture had a significant positive effect on the organizational commitment except redundancy. Second, two factors of organizational culture in R&D organizational culture had a significant positive effect on the organizational citizenship behavior except autonomy and redundancy. it is shown reliable criterion to effective organizational management in small and medium enterprises.

• 한국IT서비스학회지
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• 제5권3호
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• pp.83-97
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• 2006

The current software company report system in Korea has many problems in its efficiency and effectiveness. In this paper, we investigated the system by surveying the contracting officials and contractors in software development. By analyzing current status and some problems with the survey results, we derived an feasible improvement scheme for the software company report system. We suggested efficient procedures and reporting items for the registration process, some benefits for contractors, and the short-term direction for its implementation.

• 한국항해항만학회지
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• 제45권5호
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• pp.238-251
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• 2021

It is understood that carriers evaluate several features of ports when fixing the T/S port. Those features can be enumerated as Geographic condition of port, Service network with overseas ports, Level of port productivity, Port infrastructure, Port services level, Port Authority's Policy direction mand Cost competitiveness. The objectives of this study are to: 1) determine if those factors could affect the T/S competitiveness of the port; and 2) to evaluate how Busan port conforms to those determinants factors in such extent. According to results of the analysis after surveying National global carrier, Intra-Asia carriers, Global overseas carriers, Terminal operators, and Busan Port Authority known to be highly influential samples, all factors were proven to be factors affecting the T/S competitiveness of the port. Meanwhile, in the analysis through AHP (Analytic Hierarchy Process) methodology about the order of weight among those factors, Cost competitiveness was answered as the most important factor. On the other hand, in the analysis to find the situation if Busan port conforms to those factors, Busan port was proven to satisfy those conditions to a moderate extent. In the analysis about the order of strength among those factors, Busan port was answered to have the highest strength in the geographic condition. However, it showed the bottom level of strength in the Cost competitiveness which was answered as the most important factor among samples for determining the T/S competitiveness of the port. This indicates that Government and Port Authority of Busan have to concentrate policy capabilities on the improvement of cost competitiveness of Busan port to enhance the T/S competitiveness. In this paper, four policy recommendations are given : Integration of Busan port operation into New port, Combining multiple operators into one or a few, Attracting Global mega carriers as the New port terminal operators, and Continuous Infrastructure expansion.

• 로봇학회논문지
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• 제18권1호
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• pp.1-9
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• 2023

This paper presents an optimal path planning strategy for aerial searching and surveying of a user-designated area using multiple Unmanned Aerial Vehicles (UAVs). The method is designed to deal with a single unseparated polygonal area, regardless of polygonal convexity. By defining the search area into a set of grids, the algorithm enables UAVs to completely search without leaving unsearched space. The presented strategy consists of two main algorithmic steps: cellular decomposition and path planning stages. The cellular decomposition method divides the area to designate a conflict-free subsearch-space to an individual UAV, while accounting the assigned flight velocity, take-off and landing positions. Then, the path planning strategy forms paths based on every point located in end of each grid row. The first waypoint is chosen as the closest point from the vehicle-starting position, and it recursively updates the nearest endpoint set to generate the shortest path. The path planning policy produces four path candidates by alternating the starting point (left or right edge), and the travel direction (vertical or horizontal). The optimal-selection policy is enforced to maximize the search efficiency, which is time dependent; the policy imposes the total path-length and turning number criteria per candidate. The results demonstrate that the proposed cellular decomposition method improves the search-time efficiency. In addition, the candidate selection enhances the algorithmic efficacy toward further mission time-duration reduction. The method shows robustness against both convex and non-convex shaped search area.

• 산업기술연구
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• 제36권
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• pp.71-76
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• 2016

In this study, we determined the precise coordinates of TBMs (Tidal Bench Marks), which used as the national reference points in coastal area of Korea, using a GPS data analysis SW for the academic and scientific applications, GAMIT/GLOBK. For accurate 3-D positioning of TBM locations, we performed the GPS point surveying according to the national surveying policy and also acquired the GPS data for 48 TBMs located in the western and southern coastal part of Korea. Considering the results of baseline analysis to each observation session obtained from GAMIT module, the baseline analysis was realized to be done precisely because the values of Normalized RMS (NRMS) were mostly less than ${\pm}0.20mm$. Before the network adjustment using GLOBK module, we evaluated the suitability of observations for each session by applying the chi-squared test (${\chi}^2$ test) to the degree of freedom in observed session. An overall distributions of ${\chi}^2$ test were less than 1.0 for all sessions, and the statistical of ${\chi}^2$ test showed the average, 0.267 with minimum and maximum value, 0.063 and 0.653, respectively. Finally, we analyzed the network adjustment for 48 TBMs to reduce the residuals of baseline analysis on each point by connecting with 42 permanent GPS stations in Korea. In the network adjustment procedure, we set up the weighted values of each permanent station to be allocated between 0.9 and 1.14, and also removed the observed points having residual exceeds 4-times of standard deviation ($4{\sigma}$).

• 한국측량학회지
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• 제35권4호
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• pp.221-230
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• 2017

Demographic change was considered to be the most major driver of land use change although there were several interacting factors involved, especially in the developing countries. This paper presents an approach to predict the future land use change using a hybrid model. A hybrid model consisting of logistic regression model, Markov chain (MC), and cellular automata (CA) was designed to improve the performance of the standard logistic regression model. Experiment was conducted in Giao Thuy district, Nam Dinh Province, Vietnam. Demography and socio-economic variables dealing with urban sprawl were used to create a probability surface of spatio-temporal states of built-up land use for the years 2009, 2019, and 2029. The predicted land use maps for the years 2019 and 2029 show substantial urban development in the area, much of which are located in areas sensitive to source protections. It also showed that aquacultural land changes substantially in areas where are in the vicinity of estuary or near the sea dike. There was considerable variation between the communes; notably, communes with higher household density and higher proportion of people in working age have larger increases in aquacultural areas. The results of the analysis can provide valuable information for local planners and policy makers, assisting their efforts in constructing alternative sustainable urban development schemes and environmental management strategies.

• 한국측량학회지
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• 제27권1호
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• pp.677-682
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• 2009

개정된 측량법에 의해 2010년부터 모든 위치정보좌표는 세계측지계 좌표를 기준으로 하여야 하며 이를 위해 국토지리정보원을 중심으로 세계측지계로의 전환을 위한 기술적 제도적 기반을 마련하였다. 하지만 여러 저해요인으로 인해 현재 지방자치단체별 전환실적이 상대적으로 미흡한 실정이다. 본 연구에서는 세계측지계로의 전환에 필요한 요소 중 좌표변환방법 및 절차에 대한 분석을 통해 보다 유연성 있는 변환방법을 제시하였으며 기존의 좌표변환절차 중 효율적 인 좌표변환을 위한 보완방안을 제공하였다. 이를 위해 국가변환계수를 이용한 기존의 변환방법보다 효율적인 Affine변환의 유용성 여부를 분석하였으며 기준점의 허용오차 분석을 통해 공통점에 존재하는 비상사점의 판별 기준을 제시하였다. 또한 구성과 및 신성과가 혼재하는 지역에서의 효율적인 세계측지계 좌표변환 방법 및 세계측지계 변환에 필요한 공통점의 적절한 수량을 제시하였다.

• 한국측량학회지
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• 제18권2호
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• pp.211-219
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• 2000

21세기는 국가적 자원의 한계, 국토개발, 해양자원ㆍ해양공간을 이용한 개발, 그리고 국제외교 및 국가 안보적 차원에서 도서개발이 더욱 활발해질 것이다. 따라서 도서지역의 각종 정보들이 다양해지고, 양도 방대해지는 점을 감안할 때, 이들 정보들을 효과적으로 저장ㆍ관리할 수 있을 뿐만 아니라 컴퓨터 그래픽과 멀티미디어 기능을 이용한 다양한 표현 기능을 제공해 줄 수 있는 효과적인 시스템의 개발이 필요하다. 이러한 관점에서, 본 연구는 우리나라 도서의 효율적인 관리 및 분석과 개발에 필요한 응용시스템의 모델을 제안하는데 주된 목적을 두었다. 즉, 본 연구는 종래의 정보시스템과는 달리 공간정보와 속성정보를 동시에 관리함으로써 업무의 능률을 향상시킬 수 있고, 도서의 관리ㆍ개발에 대한 각종 의사결정 및 정책결정을 객관적으로 유도할 수 있도록, 지형공간정보체계를 이용한 도서정보관리시스템 모델을 개발한 것이다.

• 한국측량학회지
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• 제33권5호
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• pp.373-383
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• 2015

공간정보는 국토의 효율적 관리와 재해·재난·환경·시설물·기업마케팅·문화재 관리 등 사회전반에 걸쳐 활용되고 있으며, 향후 더 많은 수요가 예상되고 있다. 이에 중앙정부, 지방자치단체, 공공기관 등에서는 데이터 품질이 확보된 정확한 정보를 기반으로 국가공간정보시스템(국토교통부 국토정보정책관실에서 관리하는 15개의 공간정보 관련 시스템) 체계를 구축해야하며, 이를 통해 정책결정이나 민원지원에서 공간정보의 활용과 편의를 도모할 수 있다. 그러나, 현재 국가공간정보시스템은 개별 업무처리 위주로 시스템을 구축하고, 분산된 연계 채널로 인해 데이터 중복구축과 품질 저하라는 문제가 발생하여 공간정보의 공개·개방이 소극적으로 이루어지고 있는 상황이다. 본 연구에서는 국가공간정보시스템의 데이터 흐름에 가치사슬 모형을 적용하여 ‘생산·구축’, ‘통합·공유’, ‘응용·융복합’, ‘공개·개방’ 이라는 4단계의 공간정보 데이터 흐름 기준을 도출하였으며, 이를 기반으로 15개의 국가공간정보시스템에 대한 현황분석을 통해 시사점을 도출하고 국가공간정보시스템 개편 추진 방향을 제시하였다. 향후 국가공간 정보시스템의 개편 모델과 순환체계를 통해 최신성·일관성·정확성·연계성이 확보된 공간정보서비스를 제공하여 수요자의 요구를 만족시키고 공공활용 및 민간개방 활성화를 기대한다.