• Journal of the Korean Society for information Management
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• v.31 no.1
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• pp.119-141
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• 2014

To enhance its efficiency to improve organizations' competitiveness, performance evaluation is vital and it influences budget, policies, and human resource affairs of the organizations. The study aims to develop performance indicators for National Library of Korea (NLK) and evaluate performance based on indicators driven. As a result, the study develops 2 viewpoints for each work area of NLK - management of information system, digital resources enlargement, and the cooperative utilization system for alternative materials. It also develops total 12 indicators. Based on the evaluation;the research finally suggests strategies for performance improvement by viewpoints for NLK.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.270-274
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• 2005

우리나라의 경우 매년 인구증가와 도시화로 인한 용수부족으로 국지적인 제한 급수를 실시하는 등 점차 물 문제가 중요한 사회 문제로 떠오르고 있는 가운데 새로운 대체 용수원의 개발이 시급하게 대두되어지고 있다. 이 가운데 지하댐(Ground-Water Dam) 건설에 의한 지하수 자원의 개발이 제안되고 있다. 수자원의 계절적 편중에 의한 수자원 최적화 활용을 위해 지하댐 최적 운용기법의 개발이 필요한데 이를 위해 본 연구에서는 지하댐 운영지표(Groundwater Dam Operating Index, G.O.I)를 제안하였다. 이를 위해 쌍천 유역의 수문학적 자료와 강수의 경향, 지하수위 그리고 지하댐 운영 자료를 이용하여 강수와 지하수위 상관관계를 비교 분석하였다. 분석한 결과 일강우량 90일 이동평균의 대수값이 지하수위 변동특성과 가장 높은 상관도를 보였다. 이 결과 값을 G.O.I 로 정의 하였으며 G.O.I 지표가 1보다 작은 구간과 지하댐 운영시 제한급수가 실시되었던 구간이 거의 일치하는 것으로 나타났다. 따라서 G.O.I 를 이용한 지하댐 실시간 의사결정 시스템 구성이 가능할 것으로 판단하였다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.25 no.2
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• pp.58-65
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• 2021

As increasing social needs of pavement maintenance, pattern frame method has been constructed in Korea. The pattern frame not only increases the skid resistance of pavements but also improve the scenery. However, construction of the pattern frame currently relies on imported materials. In this paper, we localize the materials used in pattern frame and conduct performance verification on them. The important performance indicators are the adhesion strength of undercoating materials and the skid resistance of finished pattern frames. The adhesion strength was targeted at 1.4MPa, and the localization alternative material met the target performance with 2.35MPa, the skid resistance performance was targeted at 40BPN, and the localization alternative material met the target performance with 75BPN. In the case of localized materials, approximately 40% cost reduction (per 1m²)compared to imported materials was confirmed.

• Journal of Digital Convergence
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• v.14 no.10
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• pp.375-380
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• 2016

This study aimed to evaluate the possibility for assessment of binocular visual function about alteration for near point of convergence (NPC). Study subjects were total 30 (emmetropia 16, myopia 14), who had no eye disease except for the phoria and monocular corrected vision 1.0 and over. Near point of accommodation (NPA), NPC and phoria test were measured both at ordinary and stimulation of +1D. Ordinary NPC was 1.77cm shorter than NPC stimulated +1D and the NPC of emmetropia was shorter than that of myopia. The difference between NPC stimulated +1D and ordinary were increased in the emmetropia. As the NPC increased, the AC/A ratio was elevated and the feature of near exophoria appeared. The results suggested that the alteration of NPC might substitute AC/A ratio for reference variable of binocular vision. If converged and analyzed comparatively with another binocular visual evaluation test, the alteration of NPC could be developed for substitution of evaluation test.

• Journal of Labour Economics
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• v.39 no.2
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• pp.113-139
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• 2016

The purpose of this study is to establish evaluation model that can explain marginal effects of baseball players of Korean Baseball Organization (KBO) on their team winnings in terms of productivity. We proposed econometric model with using variables that are provided from official homepage of KBO to overcome the complexity of mainly used productivity index: wins above replacement (WAR). Also, compare to the previous studies such as Scully(1974) or Krautmann(1999) that using limited indices of baseball stats, this study included 61 indices that are provided from official homepage of KBO. We estimated regression based WAR(RBWAR) by conducting panel regression with each team's statistics data of 2002 to 2014. As a results, RBWAR shows 0.869 correlation coefficient for batters and 0.882 for pitchers with WAR in 2014 that can be concluded that two indices shows similar results. From the results of estimation, we analyze the relationship between productivity and actual contract of free agent players in 2015 and it showed that teams have contracted reasonably.

• Journal of KIISE:Computing Practices and Letters
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• v.15 no.4
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• pp.299-303
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• 2009

Patent information search is used for checking existence of earlier works. In patent information search, there are many reasons that fails to get appropriate information. This research proposes a method extracting alternative word candidates in order to minimize search failure due to keyword mismatch. Assuming that two words have similar meaning if they have similar co-occurrence words, the proposed method uses the concept of concentration, association word set, cosine similarity between association word sets and a ranking modification technique. Performance of the proposed method is evaluated using a manually extracted alternative word candidate list. Evaluation results show that the proposed method outperforms the document vector space model in recall.

• Science of Emotion and Sensibility
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• v.15 no.3
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• pp.345-354
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• 2012

The purpose of this study is finding alternative parameters of the HRV so as to minimize the subjective errors by STAI and BDI, could be have two types of significant correlation levels depending on normalized method. Particularly, the LF/HF presented as the quantitative physiological parameter that can reflect both state-anxiety and trait-anxiety.

• Journal of Climate Change Research
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• v.3 no.2
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• pp.101-116
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• 2012

Green management is, as the response to climate changes emerges to a global issue, a concept which reduction of greenhouse gases, alternative energy development and other low-carbon green growth factors are added on the existing environmental management. Also as discussions on the performance measurement of firms' domestic and international green managements proliferate and the importance of understanding, analyzing and evaluating firms' environmental maintenance rises, variety forms of green management performance measurement indicators are being developed and practiced. However, specific implementation methodologies about green management have been lacking. Hence in this research, In order to have objective evaluations on firms' green managements through the proposed indicator, AHP(Analytic Hierarchy Process) and experts' survey on weight dependence were applied. Sustainability reports and other associated documents of ten major oil/ chemical corporations of in and out of the country were analyzed and corporations were evaluated and compared through weight differentiated indicator subsections.

• The Journal of the Korea Contents Association
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• v.19 no.6
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• pp.179-191
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• 2019

It is not easy to predict the return on investment in the content business, and there is no index to evaluate cast & crew. The absolute number of TV ratings is steadily declining, but there is no substitute index yet. In this study, we tried to predict the relative popularity of the drama by designing the relative superiority of the individual drama viewership as the response variable and designing the relative superiority of the drama participants as the explanatory variables. We used various machine learning algorithms and added explanatory variables that were found to be useful in previous studies. As a result, with properly combined explanatory variables, a high prediction accuracy of 84% is obtained. In this study, we intend to promote the investment efficiency of the entire contents industry by predicting the relative popularity of the contents.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.401-401
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• 2021

최근 급격한 기후변화로 인한 기온, 강수량 등의 시·공간적 변화는 홍수, 가뭄 등과 같은 자연재해의 빈도와 규모를 증가시키고 있다. 특히 한강수계 주요 하천에서는 급격한 도시화 및 산업화로 인한 물 수요의 증가와 기후변화로 인한 강수량 감소 그리고 하천변 시설에서의 과다한 지하수 이용으로 인해 지하수위 변동이 발생하고 있다. 2017년 국가 지하수관측연보 및 지하수조사연보에 따르면 한강수계에 위치한 전체 569개 관정 중 암반층 관정과 충적층 관정의 최근 5년간 지하수위 평균 변동폭은 각각 3.91 m, 2.73 m로 조사되었으며, 10년 이상 장기관측 자료를 보유한 430개소 관정 중 228개소 관정에서 지하수위 하강 추세를 보이는 것으로 조사된 바 있다. 이처럼 강우나 하천수위 등 자연적인 원인과 양수, 유출 등 인위적인 원인에 의해 발생하는 지하수위의 하강은 지반 침하의 주요 원인이 되며, 하천 기저유출의 변화에도 큰 영향을 미치고 있다. 기저유출은 하천으로 단기 유출되는 지하수로 평수기 및 갈수기 하천 유량의 대부분을 차지하고 있기 때문에 건기시 하천 수질과 수생태계 관리에 있어 매우 중요한 요소에 해당된다. 따라서, 기후변화에 의한 이상가뭄 발생 등을 대비하기 위한 비상용수 또는 대체수자원으로서의 지하수 개발수요가 증가하는 추세에 따라 기저유량 확보 및 수질 개선 방안을 수립하는 것은 지속가능한 수자원 이용·관리 측면에 있어서 매우 중요하다. 현재 활용되는 SWAT(Soil and Water Assessment Tool)과 HSPF(Hydrological Simulation Program Fortran) 수문모형의 경우 지표유출 모의에 있어서 다양하게 활용되고 있으나 기저유량의 특성을 고려하기 위해서는 지표하 수문거동 모의가 어렵다는 한계가 있다. 또한 지표하 수문거동 모의가 가능한 MODFLOW의 경우 지표유출을 모의하기 어려운 한계가 있다. 이를 극복하기 위하여 SWAT-MODFLOW 모형이 개발되었으며, 본 연구에서는 SWAT-MODFLOW 모형을 활용하여 신둔천 유역을 대상으로 유량 및 지하수위 모의결과를 검보정하여 기저유량을 산정하고 변동특성을 분석하였다.