• 한국신뢰성학회지:신뢰성응용연구
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• 제18권3호
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• pp.260-270
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• 2018

Purpose: The purpose of this study is to evaluate the life of the capsule, which is a core part of the heat storage cooling system. This paper will develop a life test mode that can reproduce environment conditions through the analysis of capsule shrinkage and expansion characteristics. Methods: In order to determine the life test mode of the capsule, this paper analyzed the case of field failures and analyzed the deformation characteristics according to the pressure fluctuation of the capsule. The method to find out whether the field failure and deformation analysis results are consistent is the testing with the construction of the repetition pressure test equipment and the thermal cycle test to reproduce the freezing and thawing characteristics. Results: In this study, failure mode analysis and analysis of freezing and thawing characteristics regarding to the capsule positions were completed. Based on this test & analysis results, this paper have been able to determine the main parameters for determining the life test mode, the freezing and thawing time. Conclusion: Determining the lifetime mode of the capsule can be used to improve the life and performance of the thermal storage system.

• Architectural research
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• 제14권3호
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• pp.93-98
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• 2012

The objective of the study is to analyze the relative performance of factors affecting indoor air quality in multi-residential buildings in Korea. A study of the factors affecting indoor air quality is essential for establishing indoor air quality management strategies effectively. To observe the indoor air quality response following a modification of a given parameter, a sensitivity analysis was performed. The factors examined for the analysis include; wall/ceiling paper, adhesive for wall/ceiling paper, floor material, adhesive for floor material, and ventilation rate. The Experimental Design which identifies main effects among the design parameters with a few experiments was used to decrease the number of experiments. The simulation for indoor air quality was undertaken using a validated equation. Then, ANOVA(Analysis of Variance) was performed to evaluate the relative importance of each parameter affecting the indoor air quality. The result of the study indicates that the indoor air quality may be influenced most by adhesive for wall/ceiling paper, followed by ventilation rate and adhesive for floor material.

• 한국측량학회지
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• 제13권1호
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• pp.13-20
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• 1995

수평위치 결정에서 오차해석은 중요하다. 오차해석의 경우 표준오차타원이 정밀도의 척도로써 사용되나, 오차한계의 설정이나 측정치의 합격기준과 상대오차를 비교하는데 한계가 있어, 캐나다나 미국에서는 작업규정 에 95%신뢰타원을 오차한계로 설정하고 있다. 본 연구에서는 수평위치 결정시 신뢰타원을 오차해석에 적용하여 분석하였다. 최소제곱법과 오차해석이론에 대해 검토하였으며 , 컴퓨터 프로그램으로 E.D.M 삼변망에 대해 오차분석을 하였다. 본 연구결과 오차한계의 설정 , 측정치의 합격기준, 상대오차를 비교할 때 95%신뢰타원이 합리적이므로 작업규정에 95％신뢰타원을 도입하는 것이 필요하다. 또한 경제성있는 최적망 설계를 위해 측량망의 예비분석에도 95%신뢰타원이 효과적으로 적용될 수 있다고 사료된다.

• Journal of Information Technology Applications and Management
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• 제19권4호
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• pp.1-18
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• 2012

This paper identifies technology trends of national research and development (national R&D) by exploiting Korean national R&D patents, ranging from 2007 to 2010. In this paper, co-word analysis (CWA), which is a method to identify the relationship among technology terms by using their co-occurrences, is incorporated into network analysis to visualize the relationships among technology keywords of national R&D patents and calculate network indexes concerning inter-relationship diversity and strength of technology keywords. As a result, this research found that inter-relationship among technology keywords in national R&D are getting increasingly strengthening in an overall sense. In addition, the keyword inter-relationship diversity-strength map proposed in this paper revealed some significant technological keywords of national R&D : core technology keywords including "sensor", "film" and "fuel" and emerging keywords including "biosensor" and "thermoelectric". Because the proposed approach helps identify interdisciplinary trends of technology keywords from a massive volume of national R&D patents in a visual and quantitative way, we expect that the approach can be incorporated as a preliminary into the R&D planning process to assist R&D policy makers to understand technology convergence of national R&D and develop relevant R&D policies.

• 대한안전경영과학회지
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• 제7권4호
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• pp.61-71
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• 2005

Many researches have been focused on the analysis of industry disasters in order to reduce them. As a similar endeavor, this paper provides a propensity analysis of injured people from various industries using classification and regression tree(CART), a data mining algorithm. The sample for this work was chosen from 25,157data related to various industries during one year ( $2003.2\sim2004.1$ ) at Kangwon-Do in Korea. For the purpose of this paper, eight independent variables (injured date, injured time, injured month, type of Injured person, continuous service period, sex, company size, age)are taken from injured person group. According to the analysis result, it is found that five out of the eight factors that are predicted as significant have salient effects. Factors of season, time/hour, day of the week, or month which disasters happened do not show any significant effect. This paper provides common features of injured people. The provided analysis result will be helpful as a starting point for root cause analysis and reduction of industry disasters and also for development of a guideline of safety management.

• 한국콘텐츠학회논문지
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• 제13권9호
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• pp.440-447
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• 2013

코퍼스 언어학이 연구방법의 한 분야로서 최근 그 입지를 급격하게 넓혀온 가운데, 언어학적 현상과 함께 문학텍스트의 이해를 깊게 하는데 기여를 해 왔다. 최근 코퍼스 언어학의 급속한 저변확대에도 불구하고 문학텍스트 코퍼스를 기반으로 한 고전 및 문학작품의 재해석에 대한 시도는 국내언어학계에서 매우 미미한 실정에 머물러 있다. 이에 본 연구는 코퍼스 언어학의 분석도구인 컴퓨터 콘코던스 프로그램인 워드스미스를 이용하여 방대한 전자텍스트로 이루어져 있는 문학작픔의 문체적 특성과 주요테마를 조사하고자 하였다. 특히 본 연구는 텍스트의 주요한 특성을 나타내는 키워드(keyword)에 초점을 두고 세익스피어의 비극작품인 로미오와 줄리엣을 코퍼스 언어학적 분석기법으로 접근하여 작품세계를 재조명하여 학문적 의의가 크다고 생각되며 앞으로 관련된 후속연구가 이어질 것으로 기대된다.

• 한국시뮬레이션학회논문지
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• 제24권3호
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• pp.55-60
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• 2015

본 논문은 RUP (Relational Unified Process) 모델을 사용한 SBA (simulation-based acquisition)의 효과도를 분석하기 위한 환경을 제시하고 있다. RUP 모델이 갖는 4개의 각 단계는 요구사항 분석, 설계, 개발 및 테스트 모든 단계를 포함할 수 있다. RUP 모델을 적용할 경우 소프트웨어 개발을 각 단계에서 반복되는 개발의 형태로 명시할 수 있다. 이러한 모델의 특성은 국방 영역의 획득에 적절하게 활용할 수 있게 한다. 본 논문에서는 RUP 모델과 V프로세스 모델의 관계를 제시하여 국방획득의 적용성을 제시하였다. 특히, 이러한 이론을 기반으로 하여 어떻게 사용자 인터페이스를 개발 운용할 수 있는지를 제시하였다.

• FOCUS: LIFE SCIENCE
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• 제1호
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• pp.6.1-6.9
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• 2024

The document is a white paper on Hydrophilic Interaction Liquid Chromatography (HILIC) analysis method development. HILIC is a type of chromatography that uses an organic/aqueous mobile phase and a polar stationary phase. In HILIC, water is a strong solvent, and unlike in Reversed Phase Liquid Chromatography (RPLC), increasing the proportion of water in the mobile phase reduces the retention time of the analyte. The paper discusses when to consider HILIC analysis methods, the advantages of HILIC, and the challenges often encountered due to the lack of understanding of HILIC mechanisms compared to RPLC. It also provides a systematic flowchart for intelligent solutions for HILIC analysis method development, which includes a three-step approach for chromatography analysis method development. The first step involves gathering as much information as possible about the analyte (e.g., pKa, log P, log D). The second step involves analyzing the sample under different pH conditions using three HILIC columns in either isocratic or gradient mode to identify the suitable column/pH combination for the analyte. The third step involves optimizing the separation by investigating other parameters such as temperature and ionic strength, and assessing the robustness of the method. The paper emphasizes that the selection of the appropriate stationary/mobile phase combination, based on the differences between the HILIC stationary phases and the mobile phase pH, can provide high selectivity in the analysis. This step-by-step approach can help users develop an efficient analysis method.

• 산업경영시스템학회지
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• 제12권20호
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• pp.63-69
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• 1989

This paper tries to define and analyse the subjective responses on noise environment according to operators continuous service in the field. The hypothesis of this paper is that the longer they serve in the same field, the more they feel seriously on noise effects. A predesigned enquete was handed out to 500 operators, and performed Friedman Test in order to check the hypothesis Concludingly, this paper accepts the hypothesis by year of continuous service-questionaire number analysis.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1990년도 가을 학술발표회 논문집
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• pp.7-12
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• 1990

This paper presents an equation for balanced-steel ratio in longitudinal and transverse direction throughout analysis based on a space truss model introducing the concept of concrete softening effect. This paper also presents as equation for postcracking torisonal stiffness throughout analysis considering the equilibrium conditions and compatibility conditions based on shear panel. Correlation between predicted postcracking torsional stiffness, and experimental results was good, not only for beams tested in this paper but also for others in the literature.