• 한국국방경영분석학회지
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• 제37권1호
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• pp.49-70
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• 2011

이 연구는 군(軍) 공사계약에서 회계정보의 유용성에 관한 연구로 10억 이상 100억 미만의 토목, 건축, 전기, 통신, 환경공종을 대상으로 적격심사낙찰제하에서 육군중앙공사계약에 있어서 회계정보의 유용성, 특히 회계 정보와 낙찰률과의 관계, 그리고 낙찰률과 하자율과의 관계에 있어서 이전 연구결과에 의문을 제기하며 이를 재검증하였다. 이 연구결과는 이전 연구결과와는 달리 회계정보와 낙찰률과는 상당히 제한적인 관계로 사전적인 회계정보로 낙찰률을 식별할 수 없는 것으로 나타났으며, 반면에 하자율과의 관계에 있어서는 분별력이 있는 것으로 나타났다. 그리고 실증결과는 낙찰률의 차이가 하자율에 영향을 미칠 것이라는 가설을 지지하지 않았다. 하지만 낙찰률 및 하자율의 예측모형을 통하여 이에 영향을 미치는 회계변수들을 확인할 수 있었고, 추가적으로 분석에 포함시킨 입찰참가사전심사항목 중 비재무지표들에 대한 결과를 토대로 심사항목에서 그 가중치를 조정할 수 있을 것이다. 결론적으로 본 연구결과를 토대로 현재 군(軍) 공사계약에서 대부분을 차지하고 있는 적격심사낙찰제의 문제점을 재인식하고, 정부에서 추진하고 있는 최저가낙찰제의 확대 시행에 대한 타당성을 제공할 수 있을 것이다.

• 대한간호학회지
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• 제34권6호
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• pp.1025-1034
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• 2004

Purpose: This study defines a vulnerable group in a community that has become the main target of a national health project also, it is descriptive research to suggest an evidence-based direction to meet their deficit health-related needs, Method: This research examined 833 families and 1,835 family members of the financially vulnerable class that was registered in a home visiting program of a public health center. Among them, 892 persons who had health problems, and their family members were examined in detail to find out their characteristics of vulnerability and health needs by assessment during a nurses home visit. Frequency distribution, stepwise-regression and factor analysis were used to analyze the data. Result: The vulnerable group that was defined with social indexes set as standards, involved substantial characteristics of vulnerability. The characteristics of demand showed tendencies of being clustered in 5 factors needs of intensive nursing care, chronic nursing care problems and helplessness, maintenance of family functioning with a disability, deficient problem solving ability, and simple financial fragility. Conclusion: Categorization of needs is an evidence-based estimator of workload in nurse home visiting services, and can be used as a basic resource for direction to meet the deficit needs of a vulnerable group.

• 환경영향평가
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• 제17권6호
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• pp.357-366
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• 2008

It is certain that urbanization has transformed the ecological consequences severely, but urban ecosystem is not fully understood yet. Urban growth is not like a static form and it spreads spatially and temporally. Therefore in studying urban ecosystem, it is important to relate the spatial pattern of urbanization to ecological processes. Using gradient analysis, we attempted to quantify the urbanization's spatial impacts in Daejeon-city and Cheonan-city, Chungcheong-province, Korea. Because of Multifunctional Administrative City Planning (MACP), a lot of development projects are planned in Chungcheong-province, Korea. It's important to study about original cities' patterns and impacts. These results can be adopted to future city planning. So several measures such as fragmentation, vegetation index, surface temperature, population density, and income rate were computed along a 75km long and 3km wide transect. The results showed that Daejeon-city has a wider urban center, lower vegetation indexes, and higher surface temperature than Cheonan-city. Therefore in the perspective of urban environments and sustainable urbanism, it seems that Cheonan-city is better than Daejeon-city. The changes along the transect have important ecological implications, and quantifying the urbanization gradient is an important step in understanding urban ecology.

• Asian Pacific Journal of Cancer Prevention
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• 제17권2호
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• pp.863-866
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• 2016

Background: Extensive efforts have been made to investigate c-KIT expression in lung cancer specimens and its correlation with clinical outcomes, but the issue remains unresolved. Thus, this study will be conducted to clarify the prognostic value of c-KIT expression in lung cancer patients. Materials and Methods: We will search Pubmed, SCOPUS, and ISI web of sciences with no restriction of language. Studies with any design (except case reports or case series) evaluating correlations of c-KIT expression with survival or outcome in patients with lung cancer will be included. The outcome measures will include all types of survival indexes, including overall survival rate and disease free survival using Kaplan-Meier analysis and hazard ratios. Study selection and data extraction will be performed by two independent researchers. Quality assessment (assessment of risk of bias) and data synthesis will be implemented using Stata software version 11.1. Results: No ethical issues are predicted. These findings will be published in a peer-reviewed journal and presented at national and international conferences. Conclusions: This systematic review protocol is registered in the PROSPERO International Prospective Register of Systematic Reviews, registration number = CRD42015023391.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2006년도 전기학술대회논문집
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• pp.189-192
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• 2006

고유가 시대에 정보시스템의 발달과 더불어 안전하고 경제적인 항해계획의 수립을 지원하는 시스템에 대한 요구가 증대되고 있다. 이에 저자들이 개발한 최적항로평가시스템에 대하여 그 개발 내용 및 적용 사례를 소개한다. 기상예보데이터를 이용하여 소요시간 및 연료소모량 관점에서 최적화된 항해 계획을 생성하며, Parametric roll 을 포함한 각종 내항성능 지표를 정량적으로 평가하여, 항해자로 하여금 항해의 안전성 및 경제성 관점에서 최적화된 항해 계획을 수립하도록 지원하는 시스템을 개발하였다. 개발된 시스템의 유효성은 실 항해중 적용한 사례 및 시뮬레이션 결과를 통해서 검증하였다.

• 환경영향평가
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• 제22권6호
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• pp.713-724
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• 2013

In terms of waste load allocation, inequality of waste load discharge must be considered as well as economic aspects such as minimization of waste load abatement. The inequality of waste load discharge between areas was calculated with Gini coefficient and was included as one of the objective functions of the multi-objective waste load allocation. In the past, multi-objective functions were usually weighted and then transformed into a single objective optimization problem. Recently, however, due to the difficulties of applying weighting factors, multi-objective genetic algorithms (GA) that require only one execution for optimization is being developed. This study analyzes multi-objective waste load allocation using NSGA-II-aJG that applies Pareto-dominance theory and it's adaptation of jumping gene. A sensitivity analysis was conducted for the parameters that have significant influence on the solution of multi-objective GA such as population size, crossover probability, mutation probability, length of chromosome, jumping gene probability. Among the five aforementioned parameters, mutation probability turned out to be the most sensitive parameter towards the objective function of minimization of waste load abatement. Spacing and maximum spread are indexes that show the distribution and range of optimum solution, and these two values were the optimum or near optimal values for the selected parameter values to minimize waste load abatement.

• Journal of Electrical Engineering and Technology
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• 제8권4호
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• pp.719-728
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• 2013

Probabilistic assessment of voltage stability margin (VSM) with existence of correlated wind speeds is investigated. Nataf transformation is adopted to establish wind speed correlation (WSC) model. Based on the saddle-node bifurcation transversality condition equations and Monte Carlo simulation technique, probability distribution of VSM is determined. With correlation coefficients range low to high value, the effect of WSC on VSM is studied. In addition, two risk indexes are proposed and the possible threat caused by WSC is evaluated from the viewpoint of risk analysis. Experimental results show that the presence of correlated wind speeds is harmful to safe and stable operation of a power system as far as voltage stability is concerned. The achievement of this paper gives a detailed elaboration about the influence of WSC on voltage stability and provides a potentially effective analytical tool for modern power system with large-scale wind power sources integration.

• Earthquakes and Structures
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• 제8권1호
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• pp.57-76
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• 2015

The Performance-based Earthquake Engineering (PBEE) concept implies the definition of multiple target performance levels of damage which are expected to be achieved (or not exceeded), when the structure is subjected to earthquake ground motion of specified intensity. These levels are associates to different return period (RP) of earthquakes and structural behaviors quantified with adopted factors or indexes of control. In this work an 8-level PBEE study is carried out, finding different curves for control index or Engineering Demand Parameters (EDP) of levels that assess the structural behavior. The results and the curves for each index of control allow to deduce the structural behavior at an a priori unspecified RP. A general methodology is proposed that takes into account a possible optimization process in the PBEE field. Finally, an application to 8-level seismic performance assessment to structure in a Spanish seismic zone permits deducing that its behavior is deficient for high seismic levels (RP > 475 years). The application of the methodology to a low-to-moderate seismic zone case proves to be a good tool of structural seismic design, applying a more sophisticated although simple PBEE formulation.

• 보건행정학회지
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• 제19권2호
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• pp.51-70
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• 2009

Background : Previous studies have reported that enhanced continuity of care prevented a sudden worsening in progress among chronic disease patients, and as a result was favorable for efficient spending of health care funds. This study aims to estimate the continuity of care of Korean with diabetes and to identify factors affecting the continuity of care. Methods : This study used the Korean National Health Insurance Claims Database which includes E11 (ICD-10) as a primary or secondary disease as of 2006. Study population is 1,160,725 type 2 diabetics (20-84 years). Continuity of Care Index (COC), Modified, Modified Continuity Index (MMCI), and Most Frequent Provider Continuity (MFPC) were used as indexes of continuity of care. Results : The continuity of care in the study population was $0.94{\pm}0.10$ as calculated by MMCI, $0.91{\pm}0.16$ as calculated by MFPC and $0.86{\pm}0.23$ as calculated by COC. The lower continuity of care was shown in the patients who were female, 65 and over years old, Medical Aid recipients, 13 times or more visitors, hospital users as main attending medical institution, patients experienced hospitalizations or comorbidities. Conclusion : The continuity of care for adult patients with type 2 diabetes was high in Korea, and showed variation according to patients' characteristics. This result provides empirical evidence for policymakers to develop or strengthen programs for managing patients showing low continuity of care.

• 청정기술
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• 제19권2호
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• pp.173-183
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• 2013

전 세계적으로 자원순환 효율성 증대 및 에너지 절감을 위해 친환경제품 설계, 재활용, 재제조 등 다양한 방법론이 제시되고 있다. 본 논문은 하나의 방안으로 유니소재화에 대해서 제시하고 있다. 유니소재화는 제품 재활용이 용이하고 유해물질 사용을 저감하기 위해 설계, 생산, 수거, 재활용 등을 고려한 기존 제품의 소재의 단일화(단순화)로 정의한다. 본 연구에서는 적용 가능한 유니소재화 대상제품을 평가할 수 있는 정성적, 정량적 평가 항목을 개발하였다. 평가항목은 경제성, 기술성, 환경성을 고려하여 총 9가지로 구성되어 있으며 평가항목을 적용하여 4가지 대상제품에 대해 사례를 연구했다. 연구 결과, 블라인드형 창문을 제외한 3가지 대상제품은 유니소재화 제품으로 적용이 가능하며 평가항목의 객관성을 높이기 위해서는 유니소재화의 개념을 구체화하고 산업별 특성을 고려하여 평가할 필요가 있다.