• 한국IT서비스학회지
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• 제17권3호
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• pp.117-138
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• 2018

The purpose of this study is to empirically analyze the relationships between the Boundary Spanning Activities (BSA) of project team and system performance in ERP system development projects. We could theoretically classify the BSA in the ERP development projects into five categories on the basis of existing studies on the BSA in the research fields of organization theory, new product development, and information systems development. These five categories are 'Ambassador' activities, 'Task-coordinator' activities, 'Scout' activities, 'Sentry' activities and 'Guard' activities. And the relationship between the implementation level of activities included in each category and the project performance (system usage and users' satisfaction) was hypothesized with respect to five BSA categories. In order to test the hypotheses, we conducted on/offline survey of the participants who were involved in the ERP system development projects, and received 345 valid responses. The unit of analysis was the project team, and the total number of teams that survey participants belonged to were 103 ones. The Structural Equation Model Analysis using the SMART PLS 3.0 was applied to statistically testing the hypotheses. The results showed that 10 hypotheses among 12 hypotheses could be supported. The theoretical implications of this study can be summarized as following; first, redefining and categorizing the BSA (Boundary Spanning Activities) in the ERP system development projects, secondly, deriving measurement indicators of the implementation level for each BSA category and statistically proving the validity and the reliability of them, and finally, suggesting the theoretical background of expanding the management area of ERP systems development projects. Furthermore, the practical implication of this study is that concrete BSA items which are empirically derived can be utilized as effective guidelines for successfully implementing the BSA in the process of managing the ERP system development projects.

• 한국건설관리학회논문집
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• 제17권2호
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• pp.118-126
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• 2016

해외건설 시장은 정부와 건설기업들의 적극적인 노력에 힘입어 2015년 6월 누계 7,000억 불 수주를 돌파하는 경이로운 성장을 이루었다. 이러한 양적인 성장에도 불구하고 질적인 면에서 역량 부족, 기술력 부족 등이 대두되면서 내실화 문제가 지속적으로 제기되고 있다. 이를 극복하기 위하여 해외건설 성공요인에 대한 연구가 국내외적으로 활발히 이루어지고 있으며, 전문건설기업 선정이 핵심적인 성공요인으로써 그 중요성이 강조되고 있다. 그러나 기존 전문건설기업 선정 평가체계의 기준 미비 및 신뢰성 부족으로 인해 해외건설 시장에 진출한 국내기업의 합리적인 의사결정이 어려운 실정이다. 본 논문은 상관분석 및 다중회귀분석을 통하여 기존 사전역량평가와 사후수행평가의 문제점을 도출하였고, 세부 평가지표의 조정을 통해 개선된 평가체계를 제시하고자 한다. 제시된 평가체계는 성공적인 해외사업 수행을 위한 이상적인 전문건설기업 선정에 유용한 참고 자료로 활용 될 수 있을 것이라 기대된다.

• 수산해양기술연구
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• 제54권2호
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• pp.124-137
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• 2018

Due to the decrease in coastal productivity and deterioration in the quality of ecosystem which result from the excessive overfishing of fisheries resources and the environmental pollution, fisheries resources in the Korean waters hit the dangerous level in respect of quantity and quality. In order to manage sustainable and effective fisheries resources, it is necessary to suggest the potential yield (PY) for clarifying available fisheries resources in the Korean waters. So far, however, there have been few studies on the estimation methods for PY in Korea. In addition, there have been no studies on the comparative analysis of the estimation methods and the substantial estimation methods for PY targeted for large marine ecosystem (LME) For the reasonable management of fisheries resources, it is necessary to conduct a comprehensive study on the estimation methods for the PY which combines population dynamics and ecosystem dynamics. To reflect the research need, this study conducts a comparative analysis of estimation methods for the PY in the Korean waters of the East Sea to understand the advantages and disadvantages of each method, and suggests the estimation method which considered both population dynamics and ecosystem dynamics to supplement shortcomings of each method. In this study, the maximum entropy (ME) model of the holistic production method (HPM) is considered to be the most reasonable estimation method due to the high reliability of the estimated parameters. The results of this study are expected to be used as significant basic data to provide indicators and reference points for sustainable and reasonable management of fisheries resources.

• 한국도서관정보학회지
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• 제36권4호
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• pp.309-328
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• 2005

본 연구는 해양과학기술분야 전문연구기관의 학술연구능력을 평가하기 위하여 국내외 해양관련 연구기관 및 대학의 SCI 연구실적을 조사하고 분석하였다. 조사연구기관은 국내의 한국해양연구원과 서울대, 인하대, 부경대, 충남대, 부산대의 해양관련학과, 그리고 해외의 WHOI, SIO, IFREMER, SOC, JAMSTEC을 대상으로 하였다. 조사대상기간은 2002년부터 2004년까지의 3개년으로 하였으며, 해당기간 동안의 SCI 연구실적과 피인용빈도, 상위 저자그룹, 상위 학술지그룹. 상위 투고분야 등으로 조사분석이 이루어졌다. 이로부터 국내 해양전문연구기관의 선진 해외연구기관 벤치마킹을 통한 향후 목표설정의 기준으로 삼고자 한다. 또한 해양전문 정보센터의 핵심 학술지 입수 관리 및 정보서비스의 우선순위를 선정하는 데에도 기여할 것이다.

• 컴퓨터교육학회논문지
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• 제6권1호
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• pp.41-54
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• 2003

웹에 존재하는 넘치는 정보 중에서 이를 교육의 목적으로 활용하기 위해서는 해당 정보에 대한 사전 검증이 반드시 선행되어야 한다. 현재에도 웹의 많은 정보들이 교수-학습의 내용으로 활용되고 있고 또 웹기반교육이나 정보통신기술활용교육의 소재가 되고 있으나 이들 정보에 대한 총체적 질을 관리하기란 여간 어려운 일이 아니다. 본 연구는 교육용 웹 사이트에서 제공하는 정보의 질 관리에 유용한 도움을 줄 수 있는 평가의 준거를 개발, 적용해 보고 이러한 과정을 통하여 교육용 웹 사이트 설계, 개발과정에 최우선적으로 고려되어야 할 중요한 사항들을 제안해 보고자 하였다. 이를 위해, 교육용 웹 사이트의 평가에 유용하다고 판단되는 평가항목들을 체계적으로 분류 정리하고 교육용 웹 사이트에 대한 만족도 항목을 추가한 뒤, 통계적 분석과정을 통해 의미있는 평가준거들을 제안하였다. 각 개별 평가항목을 설문항목으로 전환하여 설문조사를 실시하여 개별항목의 신뢰성과 타당성을 검증해 보았으며 이 과정을 통해 추출된 14개 요인과 웹 사이트 만족도 간의 희귀분석을 통해 중요 평가지표들을 추출해 보았다. 이 과정에서 학습자중심의 교육용 웹 사이트 개발에 최우선적으로 고려되어야 할 평가지표들이 제안 되었고, 설계적 시사점 등이 논의되었다.

• 한국물환경학회지
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• 제33권5호
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• pp.546-555
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• 2017

The Nutrient budget is one of the agricultural-environment indicators of OECD. A nutrient budget measures the surplus as the differential between the inputs and the outputs of within a certain boundary and within a specified period of time (i.e. one year). According to OECD, the annual nitrogen budget for Korea was $245kg\;N\;ha^{-1}$ in 2014, which corresponds to the first position among OECD countries. In Korea in 2014, about 90 % of livestock excreta was composted as solid and liquid manure, which are usually and customarily spread on agricultural land. The objectives of this study are intended to suggest methodology of the regional nitrogen budget as a nitrogen management tool, which considers conversion from raw excreta to composted manures based on the methodology of OECD/Eurostat, and application of the new method in an agricultural region of Korea. As a result, the calculated excess rate of hydrospheric nitrogen surplus was $251kg\;N\;ha^{-1}$ (in the region in 2014), which indicates the presence of potential risks emanating from excessive nitrogen, with regard to both export water and soil environments. The findings also assert that this was shown to be one of the most important elements in the nitrogen budget, which translates to the actual amounts of nitrogen lost during the solid composting process. To better understand the process and the reliability of the method, it is necessary to analyze the sensitivity of the relevant co-efficients used in the method in the near future.

• 전력전자학회논문지
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• 제25권5호
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• pp.376-384
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• 2020

An energy storage system is composed of lithium-ion batteries in modern applications. Batteries are regarded as storage devices for renewable and residual energy. The failure of batteries can cause the performance reduction and explosion of battery systems. High maintenance cost is essential when dealing with the problem of battery safety. Therefore an accurate health diagnosis is required to ensure the high reliability of battery systems. A battery pack is a combination of single cells in series and parallel connections. A battery pack has to consider various factors to assess battery health. Battery health involves conventional factors and additional factors, such as cell-to-cell imbalance. For large applications, state-of-health (SOH) can be inaccurate because of the lack of factors that indicate the state of the battery pack. In this study, six characterization factors are proposed for improving the SOH estimation of battery packs. The six proposed characterization factors can be regarded as health indicators (HIs). The six HIs are applied to the principal component analysis (PCA) algorithm. To reflect information regarding capacity, voltage, and temperature, the PCA algorithm extracts new degradation factors by using the six HIs. The new degradation factors are applied to a multiple regression model. Results show the advancement and improvement of SOH estimation.

• 한국정보시스템학회지:정보시스템연구
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• 제18권4호
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• pp.41-57
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• 2009

Although financial information is a great influence upon determining of the group which use them, detection of management fraud and earning manipulation is a difficult task using normal audit procedures and corporate credit evaluation processes, due to the shortage of knowledge concerning the characteristics of management fraud, and the limitation of time and cost. These limitations suggest the need of systemic process for !he effective risk of earning manipulation for credit evaluators, external auditors, financial analysts, and regulators. Moot researches on management fraud have examined how various characteristics of the company's management features affect the occurrence of corporate fraud. This study examines financial characteristics of companies engaged in fraudulent financial reporting and suggests a model and system for detecting GAAP violations to improve reliability of accounting information and transparency of their management. Since the detection of management fraud has limited proven theory, this study used the detecting method of outlier(upper, and lower bound) financial ratio, as a real-field application. The strength of outlier detecting method is its use of easiness and understandability. In the suggested model, 14 variables of the 7 useful variable categories among the 76 financial ratio variables are examined through the distribution analysis as possible indicators of fraudulent financial statements accounts. The developed model from these variables show a 80.82% of hit ratio for the holdout sample. This model was developed as a financial outlier detecting system for a financial institution. External auditors, financial analysts, regulators, and other users of financial statements might use this model to pre-screen potential earnings manipulators in the credit evaluation system. Especially, this model will be helpful for the loan evaluators of financial institutes to decide more objective and effective credit ratings and to improve the quality of financial statements.

• 한국조경학회지
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• 제34권5호
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• pp.39-51
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• 2006

This study was carried out to provide guidance to environmental policy makers when deciding which assessment fields (biotic, abiotic, qualitative, functional) should have priority for ecological preservation and to develop an objective and scientific methodology by introducing the engineering concept of the fuzzy integral. The grant of weights was used the eigenvalues calculated by factor analysis, and the converted values of indicators were obtained in multiplying the arithmetic values and eigenvalues. The results of the appropriateness and reliability of assessment fields were examined over 0.6, and the results showed that the design of questionnaire presented no great problems. When the fuzzy integral was calculated to determine the rankings at ${\lambda}$=1, 2, 3, 4, 5, respectively, they were 0.646, 0.630, 0.943, 1.423, and 1.167 for the biotic field, 1.298, 1.400, 0.901, 0.580, and 1.456 for the abiotic field, 0.714, 0.674, 0.346, 0.674, and 1.610 in the qualitative field and 1.000, 0.973, 0.943, 1.024, and 1.008 in the functional field. The sensitivity to ${\lambda}$ value showed that ${\lambda}=4$ was the most suitable. In comparison with ${\lambda}=0$ (the arithmetic mean), the range of change was narrow. Because the range for ${\lambda}=4$ was narrower than my other values, ${\lambda}=4$ was sure to be available in ranking-decision. The fuzzy integral is expected to be a method for analyzing and filtering human thoughts. In the future, in order to overcome linguistic uncertainty and subjectivity, other fuzzy integral models including Sugeno's method, AHP, and so forth should be used.

• 한국항공우주학회지
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• 제47권2호
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• pp.114-121
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• 2019

무미익 항공기는 꼬리 날개가 없기 때문에 일반적인 형태의 항공기에 비해 피탐성 낮으나 안정성이 좋지 않아 제어기를 설계하는 것이 쉽지 않다. 특히 비행 중에 임무장비 투하나 연료 소모 등에 의해 무게중심의 위치가 변화하는 것을 고려한다면 제어기 설계는 더욱 더 어렵게 된다. 본 논문에서는 이러한 문제점을 극복하기 위한 방법으로 L1 적응제어 방식을 제안하며 비선형 시뮬레이션을 통하여 제어기의 안정성과 성능을 검증하였다. 설계지표 선정을 위해 RPV Flying Quality Design criteria의 내용을 참고하였다. 시뮬레이션을 이용하여 급격한 관성량의 변화에 대해 설계된 적응제억기가 무미익 항공기 안정성을 유지하는 것을 보이고, 이득 스케쥴링 기법과 함께 사용 시 계산량이 줄어들 수 있음을 확인하였다.