• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2004년도 추계 종합학술대회 논문집
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• pp.427-433
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• 2004

현재 정보 제공 기관들은 분산, 독립적으로 대부분 자료 유형별 서지 메타데이터를 개발, 유형별 검색 서비스 또는 통합 검색 서비스를 제공하고 있다. 그러나 MARC나 MODS등의 관련 표준을 적용한 개별DB스키마의 경우 통합적인 관리나 일관성 있는 유지보수가 어렵고, 특히 자료 유형간의 관계 정의가 되어 있지 않아 전체 자원에 대한 체계적인 자료 수집과 공유체제 구축에는 많은 문제점이 있다. 본 연구에서는 기술적 해결방안으로서 국내외 주요 정보 서비스 기관이 현재 제공하는 학술지, 회의자료 등 여러 자원 유형의 메타데이터 모델을 수집 조사 분석하여 자료 유형별 메타데이터의 체계적 통합 관리를 지원하는 데이터 요소 정의와 모델링 프레임워크 그리고 모듈 기반의 XML DTD를 제안하고자 한다.

• 한국의료질향상학회지
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• 제10권2호
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• pp.204-215
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• 2003

Background : ICD-10 Classification, which is used domestically as well as internationally, has limited use in the clinical practice since it is developed for at disease statistics and epidemiology. Therefore, the purposes of this study were to improve the quality of diagnosis by constructing a new disease classification based on the diagnoses doctors currently make in the clinical setting and connecting this classification with OCS and EMR, and to meet the demands of doctors for high quality medical study data in medical research. Methods : The specialists in each ophthalmic subfield collected clinical diagnoses and abbreviations based on the ophthalmology textbooks and confirmed the classifications. Total number of clinical diagnoses collected was totaled 672, for which ideal diagnoses had been selected and a new model of disease classification model in connection with ICD-10 was constructed. The constructed classification of clinical diagnoses consisted of six steps: the first step was the classification by ophthalmic subspecialty field; the second to fifth steps were the detailed classification by each specialty field; the sixth step was the classification by site. Results : After introducing the new disease classification, research on the use and a pre-post comparison was conducted. The result from the research on the use of the clinical diagnoses in inpatient and outpatient care has shown a gradually increasing tendency. From the pre-post comparison of EMR discharge summary diagnoses, the result demonstrated that the diagnosis was stated correctly and in detail. Since the diagnosis was stated correctly, code classification became correct as well, which makes it possible to construct high quality medical DB. Conclusion : This construction of clinical diagnoses provides the medical team with high quality medical information. It is also expected to increase the accuracy and efficiency of service in the department of medical record and department of insurance investigation. In the future, if hospitals wish to construct a classification of clinical diagnosis and a standard proposal of clinical diagnosis is presented by a medical society, the standardization of diagnosis seems to be possible.

• Nuclear Engineering and Technology
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• 제44권7호
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• pp.791-798
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• 2012

Since standardized fracture test specimens cannot be easily extracted from in-service components, several alternative fracture toughness test methods have been proposed to characterize the deformation and fracture resistance of materials. One of the more promising alternatives is the local approach employing the SP(Small Punch) testing technique. However, this process has several limitations such as a lack of anisotropic yield potential and tediousness in the damage parameter calibration process. The present paper investigates estimation of ductile fracture resistance(J-R) curve by FE(Finite Element) analyses using an anisotropic damage model and enhanced calibration procedure. In this context, specific tensile tests to quantify plastic strain ratios were carried out and SP test data were obtained from the previous research. Also, damage parameters constituting the Gurson-Tvergaard-Needleman model in conjunction with Hill's 48 yield criterion were calibrated for a typical nuclear reactor material through a genetic algorithm. Finally, the J-R curve of a standard compact tension specimen was predicted by further detailed FE analyses employing the calibrated damage parameters. It showed a lower fracture resistance of the specimen material than that based on the isotropic yield criterion. Therefore, a more realistic J-R curve of a reactor material can be obtained effectively from the proposed methodology by taking into account a reduced load-carrying capacity due to anisotropy.

• 한국산학기술학회논문지
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• 제14권11호
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• pp.5890-5896
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• 2013

본 연구는 BIM 기반의 납품체계에서 IFC 파일의 공정정보를 축적하고 활용하기 위한 방안을 제시하였다. 이를 위해 첫 번째로, 공정정보의 활용방안에 대하여 기존연구를 분석하였고, IFC 표준을 고찰하였다. 두 번째로, 공정요소를 도출하기 위해 공정계획 수립절차를 분석하였으며, 공정프로세스와 상용소프트웨어를 분석하여 공정정보항목을 도출하였다. 또한 도출된 공정정보항목을 기반으로 IFC 스키마를 분석하여 IFC의 공정요소를 도출하였다. 마지막으로 IFC 납품파일의 축적을 위해 조달청의 시설사업 BIM 적용 기본 지침서를 분석하여 개념적인 BIM 모델의 납품프로세스를 통한 축적방법과 활용방안을 제시하였다. 본 연구는 국가적으로 진행되고 있는 BIM 도입과정에서 BIM모델의 정보를 축적하는데 기여할 것으로 기대된다.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2003년도 추계국제학술대회
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• pp.91-93
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• 2003

It has been estimated that the equivalent of approximately $US 50 billion has been spent on research on the behavior and fate of pesticides in the environment since Rachel Carson published “Silent Spring” in 1962. Much of the resulting knowledge has been summarized explicitly in computer algorithms in a variety of empirical, deterministic, and probabilistic simulation models. These models describe and predict the transport, degradation and resultant concentrations of pesticides in various compartments of the environment during and after application. In many cases the known errors of model predictions are large. For this reason they are typically designed to be “conservative”, i.e., err on the side of over-prediction of concentrations in order to err on the side of safety. These predictions are then compared with toxicity data, from tests of the pesticide on a series of standard representative biota, including terrestrial and aquatic indicator species and higher animals (e.g., wildlife and humans). The models' predictions are good enough in some cases to provide screening of those compounds which are very unlikely to do harm, and to indicate those compounds which must be investigated further. If further investigation is indicated a more detailed (and therefore more complicated) model may be employed to give a better estimate, or field experiments may be required. A model may be used to explore “what if” questions leading to possible alternative pesticide usage patterns which give lower potential environmental concentrations and allowable exposures. We are currently at a maturing stage in this research where the knowledge base of pesticide behavior in the environmental is growing more slowly than in the past. However, innovative uses are being made of the explosion in available computer technology to use models to take ever more advantage of the knowledge we have. In this presentation, current developments in the state of the art as practiced in North America and Europe will be presented. Specifically, we will look at the efforts of the ‘Focus’ consortium in the European Union, and the ‘EMWG’ consortium in North America. These groups have been innovative in developing a process and mechanisms for discussion amongst academic, agriculture, industry and regulatory scientists, for consensus adoption of research advances into risk management methodology.

• 한국IT서비스학회지
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• 제18권4호
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• pp.67-82
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• 2019

The purpose of this study is to improve the calculation method of the software operation pricing proposed by the software business price calculation guide from 'input manpower method' to 'rate calculation method'. The software operation pricing of the input manpower method is not objectively calculated in the domestic IT outsourcing situation where the statistical data based on the activity based estimating is insufficient and it is decided by agreement between the owner and the client. In addition, there was no standard for adjusting the productivity according to the characteristics of the operation service. In order to improve this, an operational correction factor item that can affect the software operation productivity was selected based on foreign and domestic standards, and it was confirmed through the first questionnaire to IT operation managers. In order to determine the level of difficulty of the fixed operational correction factors, the operational correction factor using AHP technique was confirmed through a second questionnaire for pairwise comparison. The operational difficulty calculation table was developed with reference to COCOMO and ITIL standards. Finally, we propose a new pricing scheme that reflects the operating rate. Regression analysis was carried out by collecting the data of the domestic public institutions on the estimated cost and the actual cost calculated from the new rate method software operation pricing. The results of the regression analysis show that the estimated cost and the actual cost are related to each other. Mean magnitude of relative error(MMRE) and PRED[25] analysis were added for accuracy analysis. MMRE and PRED also showed satisfactory results, confirming the possibility of replacing the rate method software operation pricing.

• 한국정보전자통신기술학회논문지
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• 제14권1호
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• pp.70-77
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• 2021

본 논문에서는 산업연관표와 한국표준산업분류를 비교하여 4차 산업혁명 관련 산업을 제조업, 정보통신서비스, 금융 및 보험서비스 그리고 과학기술서비스 4부문으로 재분류하였다. 그리고 수요유도형 모형을 이용해 4부문 산업을 외생화하여 경제적 파급효과를 분석하였다. 생산유발효과, 부가가치유발효과, 취업유발효과에 대한 분석결과, 제조업, 정보통신서비스 그리고 과학기술서비스 부문에서는 도소매 및 상품중개서비스가 큰 것으로 계측되었고, 금융 및 보험서비스 부문에서는 금융 및 보험서비스가 큰 것으로 분석되었다. 수입유발효과는 4차 산업 모든 부문에서 광산품이 가장 큰 것으로 분석되었다. 전후방연쇄효과 분석결과, 제조업과 정보통신서비스 부문은 경기변동에 민감한 중간수요적 원시사업형이고, 금융 및 보험서비스와 과학기술서비스 부문은 최종수요적 원시사업형임을 확인하였다.

• 토지주택연구
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• 제14권2호
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• pp.97-107
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• 2023

본 연구는 자연 재해 및 사회 재난 발생으로 주거권의 보장을 위한 임시주거 시설의 수요가 증가하는 추세에 대비하여 이재민에게 신속하게 양질의 주택을 공급코자 수행되었다. 대량 생산 및 운반에 효율적인 계획 모델을 만들기에 적합한 DfMA 설계 방식, 즉 제조 및 조립 기반 모듈러주택 모델을 제시하였으며, 특징은 다음 세 가지이다. 첫째, 모듈러주택을 서비스 모듈과 기능 모듈로 구분하여 고정성과 변동성을 발전시켜 다양성을 만들도록 계획했다. 둘째, 제품과 같이 이동하여 편리한 위치에 놓고 사용할 수 있도록 계획하여 대지 여건 및 수요에 맞춰 융통성 있는 배치계획을 하는 시스템을 제안 했다. 이러한 계획은 동일한 주택을 대량 생산하여 국내외의 다양한 위치와 사업에 활용할 수 있다. 셋째, 생산효율성을 높일 수 있도록 생산의 자동화를 염두해 두고 건식 공법으로 공정을 단순화하고 최소화하는 방식으로 계획했다. 이러한 DfMA설계방식 적용으로 제작 및 시공기간 단축, 공사비 절감, 주택 품질 제고를 도모하여 건설 생산성을 향상시킬 수 있다.

• Journal of Korea Trade
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• 제27권1호
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• pp.1-18
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• 2023

Purpose - Using a sample of Korean multinational corporations, we examine whether the relationship between tax risk and the implied cost of capital discriminates between the environmental, social, and corporate governance (ESG) of highly rated firms. Design/methodology - Firms with high tax risks have an increased uncertainty of future cash flows. Therefore, as the volatility of future cash flow increases, information asymmetry and the required return increases. Highly rated ESG firms can reduce information asymmetry, thereby weakening the positive relationship between tax risk and cost of capital. We employ the standard deviation of the cash effective tax rate as proxy of tax risk. We utilize the ESG rating data of the Korea Corporate Governance Service (KCGS). We use a PEG model, MPEG model, and GM model to measure the implied cost of capital. Findings - We find a positive association between the implied cost of capital and tax risk. The positive relationship between tax risk and the implied cost of capital weakens in highly rated ESG firms. Highly rated ESG firms prefer a stable tax position to invest after-tax cash flows into sustainable management. Therefore, the negative effects of tax risk on cost of capital can be reduced. Originality/value - This study provides empirical evidence that ESG activities can mitigate the negative impact of tax risk on the cost of capital for Korean multinational corporations. In a business environment where ESG activities are more important, the empirical results that ESG activities can reduce the corporate risk of Korean FDI companies are expected to provide implications for the ESG activities of multinational corporations.

• 한국정보과학회논문지:정보통신
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• 제35권3호
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• pp.173-182
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• 2008

최근 무선 환경에서 스트리밍 서비스의 서비스 품질을 향상시키기 위한 많은 연구가 진행되고 있다. 무선 환경의 채널상태 불안정은 높은 전송 지연과 손실을 발생시키게 되고, 결과적으로 사용자 측면에서의 서비스 품질을 저하시키는 문제점을 가진다. 이러한 무선 환경에서의 서비스 품질을 향상시키기 위해 IEEE 802.11 Working Group에서는 IEEE 802.11e를 제안하였고, 이를 기반으로 하는 여러 기법들이 제안되었지만 네트워크 상태에 적응적이지 못한 기존 연구들은 전송큐의 오버플로우와 데이타 손실이 발생하여 전송하는 영상의 품질을 저하시키게 된다. 본 논문에서는 IEEE 802.11e EDCA(Enhanced Distributed Channel Access) 모델을 기반으로 무선 환경에서의 멀티미디어 스트리밍 서비스 품질의 향상을 위한 기법을 제안하였다. 제안한 기법은 MPEG-4 영상의 각 프레임의 중요도에 따라 차별적으로 IEEE 802.11e EDCA 모델의 전송 방식을 적용하고, 수신측의 AC(Access Category)를 고려한 효율적인 대역폭 측정을 기반으로 한 송신측의 프레임 폐기를 통해 현재 네트워크 상태에 적응적인 전송율 조절을 한다. 실험 결과를 통해 제안한 기법이 무선 환경의 스트리밍 서비스의 종단간 서비스 품질을 향상시킬 수 있음을 확인하였다.