• Journal of Korea Water Resources Association
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• v.51 no.11
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• pp.989-998
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• 2018

Connectivity between water source and demand node can be served as a critical system performance indicator of the degree of water distribution network (WDN)' failure severity under abnormal conditions. Graph theory-based approaches have been widely applied to quantify the connectivity due to WDN's graph-like topological feature. However, most previous studies used undirected-unweighted graph theory which is not proper to WDN. In this study, the directed-weighted graph theory was applied for WDN connectivity analyses. We also proposed novel connectivity indicators, Source-to-Node Shortest Pathway (SNSP) and SNSP-Degree (SNSP-D) which is an inverse of the SNSP value, that does not require complicate hydraulic simulation of a WDN of interest. The proposed SNSP-D index was demonstrated in total 42 networks in J City, South Korea in which Pearson Correlation Coefficient (PCC) between the proposed SNSP-D and four other system performance indicators was computed: three resilience indexes and an energy efficiency metric. It was confirmed that a system representative value of the SNSP-D has strong correlation with all resilience and energy efficiency indexes (PCC = 0.87 on average). Especially, PCC was higher than 0.93 with modified resilience index (MRI) and energy efficiency indicator. In addition, a multiple linear regression analysis was performed to identify the system hydraulic characteristic factors that affect the correlation between SNSP-D and other system performance indicators. The proposed SNSP is expected to be served as a useful surrogate measure of resilience and/or energy efficiency indexes in practice.

• Journal of Korean Society of Transportation
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• v.28 no.4
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• pp.41-59
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• 2010

In this study, the indicators for evaluating the level of green growth in transportation are proposed. The authors reviewed the existing philosophies such as sustainable development and eco-efficiency and explained the differences between the philosophies and green growth. The planning hierarchy and indicator framework are proposed and the idea of indicators is also introduced. In order to decide the weighting value for objectives and targets, a questionnaire survey for transportation experts was conducted. The survey results show that low-carbon/environmentally-friendly development is the most important objective. In addition, the results reveal that transportation experts do not fully understand the concept of green growth and cannot differentiate the concept of green growth from that of sustainable development and eco-efficiency.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.499-502
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• 2006

기업의 IT 환경이 시스템 중심에서 비즈니스 중심으로 바뀌어감에 따라 IT 서비스 관리 프로세스 구축에 대한 가이드를 제공하는 Information Technology Infrastructure Library(ITIL) 모델이 나왔다. ITIL 적용이 가장 큰 목적은 IT 업무 프로세스 개선을 통한 서비스 품질 개선과 서비스 비용 절감이다. 변경관리 IT 환경의 모든 사고 및 변경에 관해 효율적이고 신속한 처리를 위한 표준화된 방법과 절차를 사용하는 ITIL 의 Service Support 의 한 영역이다. 그러나 기존 모델에는 우선순위, 업무범위등 처리절차에 대해 선진사례가 나와있는 반면 일정에 대한 신뢰성이 없다는 문제점이 있다. 따라서 본 논문에서 프로젝트 관리에서의 일정관리 개념을 도입하고 Goal Question Metrics(GQM) 기법을 사용하여 일정관리의 신뢰성을 부여할 수 있는 개발기간 지표를 제안한다. 또한 이러한 지표의 타당성 검증을 위해 S 사의 데이터를 비교 분석한다. 결과적으로 제안하는 지표를 통하여 조직운영의 효율성과 비즈니스에 초점을 맞춘 IT 서비스를 제공할 수 있다.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 1999.11a
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• pp.352-355
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• 1999

실내에서 대부분의 시간을 보내는 현대인들에게 있어 쾌적한 실내환경은 작업의 효율성을 증대시킬 뿐만 아니라, 건강의 유지나 에너지 절약 차원에서 매우 중요한 요소이다. 따라서 국가에서도 감성공학 기반기술 개발 사업에서 쾌적한 실내 환경을 구현하기 위한 연구가 진행되고 있다. 본 연구에서는 이러한 연구의 결과들을 이용하여 쾌적한 실내환경을 구현하기 위한 요소를 지표화하였고, 결과 및 관련 내용을 비교ㆍ분석하였다. 그러나 지표화 과정에서 각 과제별 연구의 진행이 상호 독립적으로 이루어져 연구의 일관성이 부족한 것으로 나타났다. 또한 개별 과제의 연구 진행과정에서 상호연관성을 가진 부분이 실험계획이나 방법이 미흡해 결과에 대한 신뢰성 저하는 물론이고, 데이터 베이스 구축을 위한 자료통합에도 상당한 문제가 있을 것으로 나타났다. 이러한 문제를 해결하기 위해서 관련 연구과제 수행자들간의 적극적인 정보교류는 물론이고 지표의 타당성을 검증하는 실험도 필요할 것으로 보인다.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.362-365
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• 2011

단위면적당 증발산량 중 일부가 식생의 물질 생산에 이용될 수 있는지를 나타내는 지표인 수분 이용효율 (Water Use Efficiency, WUE)은 총 일차생산성(Gross Primary Productivity, GPP)과 단위면적당 증발산량(Evapotranspiration, ET)의 비로 산출된다. 이전 연구들에서의 수분 이용효율의 적용은 수분 스트레스에 대한 작물의 생산성 차이 분석과 같은 작물학과 농림학 분야의 연구들이 대부분이었지만. 기후 변화가 생태계 생산성 또는 에너지 수지에 영향을 미치는 등의 전 지구적 규모의 수문학적 연구에도 적용할 수 있다. 본 연구에서는, Moderate Resolution Imaging Spectroradiometer (MODIS) 영상자료에서 1km 해상도로 8일 단위의 총 일차생산성과 증발산량을 산정함으로써 수분 이용효율을 구하였다. 향후에는 산정된 이 지표를 남한지역에 적용하여 수분 이용효율에 대한 지도를 작성하고, 실측된 총 일차생산량과 증발산 값을 이용하여 검증한 후 알고리즘을 개선해 나갈 계획이다.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.4 no.4
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• pp.1-25
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• 2009

The Government is putting efforts to enhance efficiency and productivity of performances of National R&D Programs by enacting 'Law on Evaluation and Management of Performances of National R&D Program'. This study is the result of development of evaluation model and indices for analysis of efficiency through meta evaluation method for the specific evaluation among evaluation systems for National R&D Program that are being carried out at government-wide level. Meta evaluation model for analysis of efficiency of evaluation system for National R&D Program designed evaluation indices by categorizing compositional factors into 5 categories, namely, evaluation context factor, evaluation resources factor, evaluation process factor, evaluation result factor and evaluation utilization factor. Furthermore, the result of verification of reliability on evaluation composition factors and evaluation indices analyzed to select evaluation items displayed Cronbach' $\alpha$ coefficient of 0.933, thereby illustrating that there is no major problem in the evaluation index system. In addition, computation of weight for each evaluation composition factor and evaluation index was analyzed by using analytical hierarchy process (AHP) technique. The result of analysis displayed overall consistency index of less than 0.1 for the investigators, thereby enabling analysis that there is consistency in investigators.

• The Journal of the Korea Contents Association
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• v.11 no.1
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• pp.350-356
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• 2011

The purpose of this study is to empirically examine how much the electronic clinical trial data management system actually enhances its efficiency. While the development of clinical trial markets highlights the significance of data management with increasing rate of adoption of electronic systems, its effects have not been fully supported with rigorous evidences. Particularly, the adoption rate of electronic clinical trial systems is low in domestic clinical trials markets. This study attempts to analyze the effect of the systems for reminding the importance of e-data management in clinical trials. The measurement indicator is experimented with the time related data collected from a multi-center clinical trial case. The result showed that the speed of the electronic clinical trial processes can be improved. The implication of this study lies in its first attempt to empirically analyze the effect of electronic clinical data management systems. Furthermore, application of the indicator in conjunction with electronic clinical trial processes is expected to facilitate strategic data management.

• Proceedings of the KSR Conference
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• 2007.11a
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• pp.1647-1656
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• 2007

With the growing international consensus regarding sustainable development of transportation, the plan of transportation infrastructure needs to meet various requirements toward enhancing environmental conditions. Accordingly, the upcoming long-term plan of high-speed rail network has to be reflecting the sustainability of transportation systems. In this paper, we propose methodologies based on multi-attribute utility theory for determining priorities of sustainable high-speed rail investment. The proposed methodologies identify indicators for sustainable transportation systems such as economic, environmental, social, and transportation-related ones and then, explain the way how to evaluate the overall sustainability by comparing the relative importance among indicators. This will help transportation agencies to prioritize high-speed rail investment toward sustainable transportation systems.

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.119-120
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• 2013

본 연구는 DEA기법을 이용하여 저성장, 저마진, 고위험의 삼중의 어려움 속에서 저비용 고효율의 생산조직과 리스크관리, 건전 여신 정착을 위해 건전성, 생산성, 자본적정성, 수익성이라는 상업은행의 핵심성과지표를 이용하여 효율성을 분석하였다. 분석결과 시중은행과 지방은행 모두 자본적정성에는 효율적이었으나 수익성과 생산성에 있어서는 시중은행이 지방은행보다 효율적이었다.

• Journal of the Korea Society of Computer and Information
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• v.17 no.6
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• pp.191-199
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• 2012

By the way, in light of the knowledge, even public institutions are paying much attention to the management of IT assets for achieving organizational goals. Recently, some public institutions adopt balanced scorecard for enhancing efficiency in operations and management of total administrations. To be interested, some key performance indicators(KPI) of the balanced scorecard reflect the three aspects of IT assets and their possible outcomes. The main focus of this study is to investigate whether there is positive effects of IT asset management through balanced scorecard at public institutions. Specifically, we selected and classified KPIs into different categories depending on three aspects of IT assets, internal process change, and organizational outcomes. To address relationships of KPIs among the categories, we specified each category and developed as a variable respectively. A middle-sized city provided us with 138 KPIs for the development of scales.