• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2011년도 학술발표회
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• pp.252-252
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• 2011

Rainfall-runoff models are calibrated and validated by using a same data set such as observations. The past climate change effects the present rainfall pattern and also will effect on the future. To predict rainfall-runoff more preciously we have to consider the climate change pattern in the past, present and the future time. Thus, in this study, the climate change represents changes in mean precipitation and standard deviation in different patterns. In some river basins, there is no enough length of data for the analysis. Therefore, we have to generate the synthetic data using proper distribution for calculation of precipitation based on the observed data. In this study, Kajiyama model is used to analyze the runoff in the dry and the wet period, separately. Mean and standard deviation are used for generating precipitation from the gamma distribution. Twenty hypothetical scenarios are considered to show the climate change conditions. The mean precipitation are changed by -20%, -10%, 0%, +10% and +20% for the data generation with keeping the standard deviation constant in the wet and the dry period respectively. Similarly, the standard deviations of precipitation are changed by -20%, -10%, 0%, +10% and +20% keeping the mean value of precipitation constant for the wet and the dry period sequentially. In the wet period, when the standard deviation value varies then the mean NSE ratio is more fluctuate rather than the dry period. On the other hand, the mean NSE ratio in some extent is more fluctuate in the wet period and sometimes in the dry period, if the mean value of precipitation varies while keeping the standard deviation constant.

• 한국ITS학회 논문지
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• 제7권5호
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• pp.147-158
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• 2008

ITS 근거법인 교통체계효율화법의 제정으로 ITS시스템이 활발히 구축, 개발되고 있다. 하지만 교통정보시스템의 상호 연계성을 고려하지 않아 교통정보서비스의 통합을 위한 활성화를 유도하지 못하였고, 이에 따라 국토해양부에서는 ITS 기술기준을 제정 고시하였다. 이에 본 연구에서는 센터와 단말기간의 정보교환에 대한 기본교통정보교환 기술기준 II 에 대하여 적합성 시험에 관한 연구를 실시하였다. 기술기준에 고시된 통신절차 분석을 수행하여 시험 항목을 정보요청시험과 정보제공시험으로 구분하였으며, 각 항목별로 세부시험 시나리오를 구성하였다 이에 대한 시험평가는 정보교환절차의 적합성과 데이터패킷 메시지의 정확도 등으로 구성하였으며, 기 제정된 기술기준에 의거하여 시험 횟수는 각 세부항목별 30회, 성공률은 95%를 기준으로 하였다. 본 연구는 ITS기술기준에 대한 적합성시험방법을 연구하여 국내 ITS시스템의 교통정보통합관리에 기여함을 목적으로 한다.

• 한국BIM학회 논문집
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• 제10권1호
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• pp.9-22
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• 2020

Recently, BIM has been extended to infrastructures such as roads and bridges, and the demand for BIM standard development for ports is increasing internationally. Due to the low level of utilization of classification system and drawing standards compared to other infrastructures, and the closed nature of national security facilities, ports have insufficient level of connection and sharing environment among external systems or users. In addition, since the standardization of data for port facilities is not made, it is still necessary to establish an independent DB for each system and to ensure interoperability of data between these systems since it does not have a shared environment among similar data. Therefore, the purpose of this study is to develop and verify IFC, the international standard for BIM, in order to cope with the BIM environment and to be commonly used in the design, construction, and maintenance of port facilities. To this end, we build a standard schema with port-specific Express Notation according to buildingSMART International's standard development methodology. First, domestic and international reference model standards were analyzed to derive components such as space and facilities of port facilities. Based on this, the components of the port facility were derived through the codification, categorization, and normalization process developed by the research team. This was extended based on the port BIM object classification system developed by the research team. Normalization results were verified by designers and associations. Then, IFC schema construction was based on Express-G data modeling based on IFC 4 * 2 Candidate, which is a bridge candidate standard based on IFC4 (ISO16739), and IFC 4 * 3 Draft, which is developed by buildingSMART International. The final schema was validated using the commercialized validation tool. In addition, in order to verify the structural verification of the port IFC schema, the transformation process was verified by converting the caisson model into a Part21 file. In the future, this result will not only be used as a delivery standard for port BIM products, but will also be applied as a linkage standard between systems and a common data format for port BIM platforms when BIM is used in the maintenance phase. In particular, it is expected to be used as a core standard for data exchange in the port maintenance stage.

• 산업공학
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• 제23권3호
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• pp.213-220
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• 2010

As the market becomes increasingly globalized and competition among companies increases in severity, various specialized organizations are participating across the process plant lifecycle, including the stages of design, construction, operation and maintenance, and dismantlement, in order to ensure efficiency and elevate competitiveness. In this regard, it is an important technical issue to develop services or information systems for sharing process plant data among participating organizations. ISO 15926 is an international standard for integration of lifecycle data for process plants including oil and gas facilities. ISO 15926 Part 7, a part of the ISO 15926 standard, specifies an implementation method called a facade that uses Web Services and ontology technologies for constructing plant data repositories and related services, with the aim of sharing lifecycle data of process plants. This paper discusses the ISO 15926-based prototype facade implemented for storing equipment data of nuclear power plants and servicing the data to interested organizations.

• 한국CDE학회논문집
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• 제19권2호
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• pp.103-110
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• 2014

Engineering changes are indispensable engineering and management activities for manufactures to develop competitive products and to maintain consistency of its product data. Analysis of engineering changes provides a core functionality to support decision makings for engineering change management. This study aims to develop a method for analysis of engineering changes based on On-Line Analytical Processing (OLAP), a proven database analysis technology that has been applied to various business areas. This approach automates data processing for engineering change analysis from product databases that follow an international standard for product data management (PDM), and enables analysts to analyze various aspects of engineering changes with its OLAP operations. The study consists of modeling a standard PDM database and a multidimensional data model for engineering change analysis, implementing the standard and multidimensional models with PDM and data cube systems and applying the implemented data cube to core functions of engineering change management, the evaluation and propagation of engineering changes.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1992년도 춘계학술대회 논문집
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• pp.250-255
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• 1992

This paper discusses how to develop a standard time for face cutting. The discussion focusses especially on the useful experert and law data for automated generate standard time purposes. Make standard time is a means to realize the process planning. Also process planning is a process which expresses design. In past times, a process planning was done using only experience of expert. But nowadays many people try to make automated process planning. This paper discusses standard time of the face cutting, but except making process sequence. In order to make standard time, some rules have to be generated and some industrial data found out. So we can calulate standard time in die. This is to easer and to correct calulate standard time. Using some rules that are application oriented to every parts of die.

• 한국산업융합학회 논문집
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• 제25권6_2호
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• pp.1083-1090
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• 2022

Since renal cell carcinoma(RCC) has various examination and treatment methods according to clinical stage and histopathological characteristics, it is required to determine accurate and efficient treatment methods in the clinical field. However, the process of collecting and processing RCC medical data is difficult and complex, so there is currently no AI-based clinical decision support system for RCC treatments worldwide. In this study, we propose a clinical decision support system that helps clinicians decide on a precision treatment to each patient. RCC standard big database is built by collecting structured and unstructured data from the standard common data model and electronic medical information system. Based on this, various machine learning classification algorithms are applied to support a better clinical decision making.

• 컴퓨터교육학회논문지
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• 제7권5호
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• pp.101-110
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• 2004

멀티미디어 분야에서는 오늘날의 시스템의 요구사항을 만족할 뿐만 아니라 미래의 데이터 공유 필요성을 만족할 수 있도록 확장될 수 있는 환경 데이터 표현 및 교환 메카니즘을 필요로 한다. 이러한 메카니즘은 표준화된 방법으로 데이터 표현 및 엑세스를 할 수 있도록 해야 한다. SEDRIS의 STF(SEDRIS Transmittal Format)는 이러한 목적을 가능케하는 표준으로써, 환경 데이터 사용자 및 생성자에게 명료하게 정의된 교환 명세를 제공한다. 본 논문에서는 SEDRIS의 표준 교환 포맷을 이용하여 상용 포맷(3DX MAX)을 정보 내용의 의미 손실없이 교환 포맷으로, 교환 포맷을 상용 포맷으로 변환하기 위한 컨버터를 개발하였다.

• 한국기록관리학회지
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• 제10권2호
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• pp.193-214
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• 2010

최근 메타데이터 표준의 국제적 흐름은 기록을 둘러싼 다양한 맥락정보를 개체로 설정하고 이들 각 개체 간의 다양한 관계를 보여주는 다중 개체 모형의 적용이다. 이에, 이 논문에서는 다중 개체 모형을 적용한 기록관리 메타데이터의 표준인 ISO 23081-2, 호주, 뉴질랜드, 호주의 뉴사우스웨일즈주, 퀸즈랜드주, 사우스오스트레일리 아주 표준의 특징을 비교 분석하였다. 분석은 1) 적용범위, 2) 개체수, 3) 개체 내 카테고리, 4) 요소 설계 방법을 중심으로 비교하고, 다중 개체에 있어서 가장 핵심인 관계(relationship) 개체가 어떻게 구현될 수 있는지, 실제 사례를 통해 살펴본다. 마지막으로 앞선 분석을 통해 다중 개체 모형을 적용하여 표준을 제정 할 때 고려해야 할 몇 가지 사항들을 정리해 본다.

• 품질경영학회지
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• 제50권2호
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• pp.199-220
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• 2022

Purpose: The purpose of this study is to analyze the score data released by the Korea Institute of Curriculum and Evaluation to find out the problems with the current scoring system provided by the College Scholastic Ability Test and to suggest improvement measures to solve these problems. Methods: We calculated the descriptive statistics of the standard scores using the frequency distribution table of the standard scores and identified the characteristics of the standard scores by expressing the distribution as a graph. Also, we developed an index to evaluate whether each stanine level was stably assigned and calculated the indexes for each area/subject by using the data on the number of examinees for each level. Results: We found that the relationship of conversion from raw scores to integerized standard scores is different depending on the size of the standard deviation of the raw scores, and identified the problem that the raw score information is not fairly reflected in the calculation of the percentile and level as the two raw scores are converted to one standard score. This problem can be solved by calculating the standard score to a decimal point. Conclusion: In this study, as a way to improve the quality of the scores of the current CSAT, the standard score and percentile decimal notation, the specific regulations of the standard score and stanine level calculation method, and the expansion of the open range of the scores were suggested.