• The KIPS Transactions:PartD
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• v.14D no.1 s.111
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• pp.107-120
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• 2007

When it tomes to IT investment, it's a challenge for the management to make the right decision. Unlike investment in other business area, it's hard to measure direct cost vs. effect in IT business. To validate the investment in IT, it is required to establish objective assessment system that both provider and beneficiary of information can accept, and it is also required to suggest an assessment tool of fixed quantity that includes measuring standards and method for the economic effect of new investment. This study, therefore, has developed IT ROI Methodology that can prove investment validity by accepting the strong points of the existing models while complementing their weak points and by analyzing IT Investment and IT Efforts. It also has built an IT ROI System that reflects the methodology which is applied to 21 companies of 5 business categories. This system is designed to provide effective and objective decision-making tool for IT investment by proving what positive impacts IT could have on business activities.

• Journal of the Korean Society of Radiology
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• v.14 no.7
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• pp.957-964
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• 2020

T2 FLAIR sequence of MRI in Acute Ischemic Stroke patients is meaningful to those who have the diagnosis of cerebral hemorrhage and neurological deficiency, including the detection of cerebral infarction around Cerebrospinal fluid. However, because of the long acquisition time and mutative motion artifacts caused by movement, It is difficult to take the MRI image acquisition for non-cooperative patients who need to apply a rapid image acquisition. In this study, we applied the EPI-FLAIR sequence, which is one of the fastest pulse sequences in use, which is a combination of EPI sequence and T2 FLAIR sequence, to patients with acute ischemic cerebral infarction. Based on the qualitative and quantitative evaluation results of the EPI-FLAIR and T2 FLAIR image, we will evaluate the diagnostic usefulness of the EPI-FLAIR sequence.

• Proceedings of the Korean Society of Crop Science Conference
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• 2005.04a
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• pp.2-6
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• 2005

질병의 예방, 노화억제, 돌연변이 억제 등 다양한 생리활성을 나타내는 안토시아닌 색소 C3G가 다량 함유되어 있는 흑자색 유색미의 성분연구를 수행한 결과 9가지의 천연화합물을 분리하였으며, 그 중 항산화 기능이 매우 뛰어난 페놀성 화합물 oryzafuran을 최초로 분리 그 구조를 확인하였다. 또한 allantoin과 같은 알칼로이드도 쌀에서는 처음으로 분리하였다. 이러한 결과를 통해 흑자색 유색미는 식용이상의 역할을 수행할 것으로 판단된다. 아울러 이러한 성분의 정량분석 방법과 합성과 관련된 메커니즘, 성분의 약리적 기능, 유전자원 평가 등 산업화를 위한 체계적인 연구가 수행되어야 할 것이며, 더 나아가 고C3G, 저단백, 저알레그렌, 고불포화지방산 등과 같은 다기능성 유색미 품종을 육성 보급함으로써 국민보건 및 농가소득에 크게 기여할 것으로 판단된다. 특히 이와 같은 성분이 주로 분포하는 미강은 도정과정을 통해 대부분 제거되기 때문에 회수하기가 용이하고, 따라서 부산물로 발생하는 흰쌀을 식품가공분야에서 이용할 수 있어 산업적으로 가치가 매우 높다고 판단된다.

• Journal of Environmental Policy
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• v.13 no.3
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• pp.3-19
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• 2014

Large-scale unband development resulted from the rapid economic growth in the Republic of Korea has brought about the habitat destruction for the native animals and plants living in forest and farmland. In order to resolve this problem, it is necessary to consider the natural ecosystem as an organism and to preserve the natural ecosystem by managing ecologically significant habitat consistently. Especially, the local governments should be able to establish regional ecologic networks in consideration of the ecological connectivity and the environmental and ecological excellence, and to reflect them into the local development plans. In regard to this, the methods of the regional ecological network establishment was presented, making use of the results including the national ecological network which assessed the ecological connectivity of the nation and the environmental and ecological assessment results of the Environmental Conservation Value Assessment Map which was designed to analyze and assess the national environmental and ecological values quantitatively. Making use of the case of Gyeongsangnam-do; the results presented that the existing national ecological network in the core region has expanded from $2,986km^2$ to $4,049km^2$ and the existing national ecological network in the buffer region has expanded from $2,940km^2$ to $3,006km^2$. Referring to the regional ecological network in the process of the local development plans could contribute to the increase in biodiversity and the integrated local environmental management including the ecosystem preservation.

• Journal of Environmental Impact Assessment
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• v.28 no.5
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• pp.427-439
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• 2019

Natural environmental ecology ofthe environmental impact assessment(EIA)is very much lacking in quantitative evaluation. Thus, this study attempted to evaluate quantitative assessment for ecosystem service in the site of Eco-delta project in Busan. As a part of climate change adaptation, this study evaluated and compared with the value for carbon fixation and habitat quality using the InVEST model before and after development with three alternatives of land-use change. Carbon fixation showed 216,674.48 Mg of C (year 2000), and 203,474.25 Mg of C (year 2015)reducing about 6.1%, and in the future of year 2030 the value was dropped to 120,490.84 Mg of C which is 40% lower than year 2015. Alternative 3 of land use planning was the best in terms of carbon fixation showing 6,811.31 Mg of C. Habitat quality also changed from 0.57 (year 2000), 0.35 (year 2015), and 0.21 (year 2030) with continued degradation as development goes further. Alternative 3 also was the highest with 0.21(Alternative 1 : 0.20, Alternative 2 : 0.18). In conclusion,this study illustrated that quantitative method forland use change in the process of EIA can helpdecision making for stakeholders anddevelopers with serving the best scenario forlow impact of carbon. Also it can help better for land use plan, greenhouse gas and natural environmental assets in EIA. This study could be able to use in the environmental policy with numerical data of ecosystem and prediction. Supplemented with detailed analysis and accessibility of basic data, this method will make it possible for wide application in the ecosystem evaluation.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.137-137
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• 2023

해양쓰레기는 해안의 심미적 가치 저하뿐만 아니라 생태계 파괴, 유령 어업에 따른 수산업 피해 등의 사회적·환경적 문제를 발생시키며, 그중 70% 이상은 육상 기인으로 플라스틱 및 기타 쓰레기가 주를 이루는 해외와 달리 국내의 경우 다량의 초목류를 포함하고 있다. 다양한 부유쓰레기에 대한 기존의 해양쓰레기량 추정의 한계와 하천·하구 쓰레기 수거의 효율화를 위해 해양으로 유입되는 부유쓰레기 방지를 위한 실효성 있는 대책 수립이 필요한 실정이다. 본 연구는 해양 유입 전 하천의 차단시설에 차집된 부유쓰레기의 수거 효율화 및 지속가능한 해양쓰레기 데이터 구축을 위해 AI기반의 기술을 통해 부유쓰레기 성상 분석 기법(Object Detection)과 차집량 분석 기법(Semantic Segmentation)을 활용하였다. 실제와 유사한 데이터 수집을 위해 다양한 하천 환경(정수조, 소하천, 급경사수로)에 대해 탁도(녹조, 유사), 광량, 쓰레기형상, 초목류 함량, 날씨(소하천), 유속(급경사수로) 등의 실험조건에 대하여 해양쓰레기 분류 기준 및 통계를 바탕으로 부유쓰레기 종류 선정하여 학습을 위한 데이터를 수집하였다. 학습 목적에 따라 구분하여 라벨링(Bounding box, Polygon)을 수행하고, 각 분석 기법별 전이학습을 통해 Phase 1(정수조), Phase 2(소하천), Phase 3(급경사수로) 순서로 모델을 고도화하였다. 성상 분석을 위해 YOLO v4를 활용하여 Train, Test DataSet(9:1)을 구성하고 학습 및 평가는 Iteration마다의 mAP, loss 값을 통해 비교하였으며, 학습 Phase에 따라 모델 고도화로 Test Set의 mAP 값이 성상별로 높아짐을 확인하였으며, 차집량 분석을 위해 Unet을 활용하여 Train, Test, Validation DataSet(8.5:1:0.5)을 구성하고 epoch별 IoU(intersection over Union), F1-score, loss 값을 비교하여 정성적, 정량적 평가 모두 Phase 3에서 가장 높은 성능을 확인하였다. 향후 하천 환경에서의 다양한 영양인자별 분석을 통해 주요 영향인자 도출 및 Hyper Parameter 최적화를 통한 모델 고도화로 인해 활용성이 높아질 것으로 판단된다.

• Journal of Software Assessment and Valuation
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• v.15 no.2
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• pp.1-7
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• 2019

Program similarity analysis consists of substantial similarity and access. Substantial similarity is a judgment of how similarly the program source code is quantitatively. Access determines the degree of similarity by analyzing comments in the program or other contextual evidence. In the case of manuals, it may be the subject of legitimacy analysis. Manuals can be divided into three types as follows. First, a master manual is a document created during the development stage of a product. It is a user manual that contains all the functionality of the product and its derivatives. Second, the customer manual is a manual that is open only to the primary customer and orderer. Third, the user manual is a document that is applied to the final OEM production stage and is open to the end purchaser. In this paper, we compare the master manual seized from the suspect and the master manual provided by the suspect on the Internet. It then determines how similar this master manual is and includes the victim company's original and property values.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.04a
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• pp.24-24
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• 2019

DMZ 및 접경지역은 지난 60여 년간 인간의 간섭을 받지 않아 세계적으로 우수한 생태계의 보고이며, 백두대간, 도서연안과 함께 한반도 3대 핵심생태축의 하나로서 한반도생태계보전을 위한 가장 중요한 지역이다. 이러한 DMZ 및 접경지역에 대하여 국내적 중요성 인식 제고뿐만 아니라 국제적으로도 중요생물다양성지역(KBAs)으로서의 가치인식을 위해 IUCN에서 제시하는 평가기준을 검토하고 이의 기준을 적용하여 DMZ의 생물다양성에 대한 국제적 가치정도 판단 및 중요생물다양성지역(KBAs)으로서의 보전방안을 수립하고자 한다. 첫째, DMZ 일대를 대상으로 서식하는 자생식물의 분포지역을 파악하여 DMZ 및 접경지역의 식물상은 18과 139속 367종 1아종 44변종 10품종 422분류군으로, 총 138과 613속 1,517종 8아종 217변종 58품종으로 총 1,800분류군으로 확인되었다. 본 연구대상지의 동부지역에서 가장 많은 1,482분류군, 중부지역은 1,225분류군, 서부지역은 1,080분류군으로 가장 적은수의 식물이 확인되었다. 둘째, DMZ 및 접경지역을 대상으로 객관적이고 정량적인 방법을 통한 DMZ 및 접경지역의 중요생물다양성지역(KBAs) 지정기준을 적용하여 개느삼, 금강초롱, 모데미풀 3종을 중요생물다양성지역(KBAs) 후보종으로 선정하였다. 후보종별로 분포예측 결과 전체 면적 $5,270.5km^2$ 중요생물다양성지역(KBAs) 지정을 제안하였다. 셋째, 지정기준을 통하여 선정된 DMZ 및 접경지역에 서식하는 주요 식물에 대한 국제적 가치를 판단하여 우리나라 상황에 맞는 중요생물다양성지역(KBAs)을 적용함으로써 효과적인 관리방안으로 투명하고 체계화된 국제적 기준으로 해당 지역 내의 생물종 다양성을 지속가능하게 보호하기 위한 구체적인 방향 설정 및 관리를 위한 노력이 이루어질 수 있도록 유도 할 수 있다. 수집된 자료를 통하여 중요생물다양성지역(KBAs)에 적합한 종을 중심으로 보호구역을 지정하고 국내적으로 중요한 지역적 멸종위기종에 대한 적용을 추가적으로 진행하여 식물다양성이 중요한 지역의 보호를 위한 우선순위 및 구체적 접근계획을 수립할 수 있을 것으로 판단된다. 국가적인 차원에서 DMZ 및 접경지역의 지속적인 조사를 통하여 중요생물다양성지역(KBAs)기준 적용에 필요한 기초자료를 충분히 수집하고 국내 환경에 부합하는 중요생물다양성지역(KBAs)기준 적용을 통하여 꾸준히 재평가하여 후속연구의 발판을 마련하여야 한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.3
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• pp.649-664
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• 2015

Recently, the risk of security incidents has been increased due to change of IT environment and development of new hacking methods. Event study methodology that measures the effect of a specific security incident on the stock price is widely adopted to analyze the damage cost of security incidents on market value. However, analysis of company's temporary stock price change is limited to immediate practical implication, and reputation loss should be considered as a collateral damage caused by security incidents. We analyzed 52 security incidents of listed Korean companies in the last decade; by refining the criteria presented by Tobin's q, we quantitatively showed that the companies has significantly higher reputation loss due to security loss than the other companies. Our research findings can be used in order that the companies can efficiently allocate its resource and investment for information security.

• Journal of the Korean Institute of Landscape Architecture
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• v.39 no.5
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• pp.57-75
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• 2011

The purpose of this study is to find ways of evaluating the suitability of sites being considered for development of different types of parks in the vicinity of yangmock-myun kyoung buk, where a large project(as large as about14.0$km^2$) has been planned. The results are as follows. Three surveys for selecting the assessment indicators were performed. ${\cdot}$ The first survey analyzed the importance of 23 selected assessment indicators based on a review of existing literature review and an on-the-spot research. ${\cdot}$ The second survey selected assessment indicators for each park type. ${\cdot}$ The third survey computed additive values of selected assessment indicators by the park types. It used a method of standardizing the average importance of indicators by making their sum equal to 10. These additive values were then multiplied by each grade of indicators to make a final evaluation. An evaluation of the site-suitability of park types was performed twice. The purpose of the first evaluation was to figure out how much each type met the minimum requirements targeted for all landscape types. The minimum requirements were derived by using a relative comparison between the standard of value rating of the assessment indicators, which was over the medium magnitude on the importance analysis, and the result of field research. A second evaluation estimated the targeted sites that met the minimum requirements. Value ratings of second assessment indicators were quantitatively divided as 1 to 3 grade and the evaluation scores were added, giving an additive value for each assessment indicator. The evaluation score on each park type was rated on a scale of 1 to 3 according to their averages, (from lowest to highest). Since this evaluation model of the site suitability on park types only focused on the 'face' of space in this study, additional analysis is necessary for setting the evaluation model and incorporating the overall impact of space, network connection and other factors, considering 'spot', 'line' and 'face' aspects of space.