• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2017년도 추계학술대회 논문집
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• pp.1489-1506
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• 2017

'신기후체제 대응' 이라는 범국가적 미션 뿐 만 아니라 현재 국내에서의 원자력계 입지를 고려할 때 원자력계의 적극적인 대처와 전략이 필요한 상황이다. 본 연구는 기후기술과 기술협력의 중요성에 주목하여 연구기관 및 관련 기업이 현재 보유 혹은 개발 중이거나 향후 개발 가능한 온실가스 감축 및 기후변화 적응에 활용 가능한 기술과 연구분야를 발굴하기 위해 추진되었다. 이를 위해 한국원자력연구원 및 연구원 Family 기업을 대상으로 총 3회의 조사를 시행하였다. 이를 통해 원자력발전을 통한 온실가스 감축 기여 외에도 원자력계 내에 온실가스 감축과 기후변화 적응 기술을 다양하게 보유하고 있음을 증명하였고, 정책적 시사점을 도출하였다. 국가 주도의 기후기술 연구 전략이 성공적으로 수립 이행되기 위해서는 연구 및 정책 분야 전문가들의 기후기술에 대한 명확한 이해와 정부의 지원이 필요하다. 마지막으로 기술 활용 혹은 개도국으로의 이관 시 국가 NDC 달성에 얼마만큼 영향을 미치는지에 대한 성과 측정 기준이 확정 된다면 향후 고도화된 연구개발 전략 수립은 물론, 연구자들의 참여도를 이끌어 낼 수 있을 것이라 판단한다.

• Journal of Radiation Protection and Research
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• 제41권3호
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• pp.191-195
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• 2016

Background: The current status of ACE format MCNP/MCNPX libraries by NDC of KAERI is presented with a short description of each library. Materials and Methods: Validation calculations with recent nuclear data evaluations ENDF/BV-II. 0, ENDF/B-VII.1, JEFF-3.2, and JENDL-4.0 have been carried out by the MCNP5 code for 119 criticality benchmark problems taken from the expanded criticality validation suite supplied by LANL. The overall performances of the ACE format KN-libraries have been analyzed in comparison with the results calculated with the ENDF/B-VII.0-based ENDF70 library of LANL. Results and Discussion: It was confirmed that the ENDF/B-VII.1-based KNE71 library showed better performances than the others by comparing the RMS errors and ${chi}^2$ values for five benchmark categories as well as whole benchmark problems. ENDF/B-VII.1 and JEFF-3.2 have a tendency to yield more reliable MCNP calculation results within certain confidence intervals regarding the total uncertainties for the $k_{eff}$ values. Conclusion: It is found that the adoption of the latest evaluated nuclear data might ensure better outcomes in various research and development areas.

• 산업경영시스템학회지
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• 제42권2호
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• pp.78-85
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• 2019

High variance observed in the measurement system can cause high process variation that can affect process capability badly. Therefore, measurement system analysis is closely related to process capability analysis. Generally, the evaluation for measurement system and process variance is performed separately in the industry. That is, the measurement system analysis is implemented before process monitoring, process capability and process performance analysis even though these analyses are closely related. This paper presents the effective concurrent evaluation procedure for measurement system analysis and process capability analysis using the table that contains Process Performance (Pp), Gage Repeatability & Reproducibility (%R&R) and Number of Distinct Categories (NDC). Furthermore, the long-term process capability index (Pp), which takes into account both gage variance and process variance, is used instead of the short-term process capability (Cp) considering only process variance. The long-term capability index can reflect well the relationship between the measurement system and process capability. The quality measurement and improvement guidelines by region scale are also described in detail. In conclusion, this research proposes the procedure that can execute the measurement system analysis and process capability analysis at the same time. The proposed procedure can contribute to reduction of the measurement staff's effort and to improvement of accurate evaluation.

• 교육녹색환경연구
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• 제21권2호
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• pp.25-35
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• 2022

'기후 위기에 대처하기 위한 탄소 중립 및 녹색 성장에 관한 기본법' 이 제정됨에 따라, 탄소중립 달성을 위한 다양한 부문별 계획들(NDC)이 시행되고 있다. 학교시설은 '제로에너지건축물 인증'의 의무대상 건축물이며, 공공기관 건축물 중 가장 높은 비중을 차지하는 건물로, 탄소중립 시나리오의 건물부문에서 주요한 역할을 한다. 본 연구는 이러한 학교시설의 건물에너지관리시스템 보급 활성화 및 효율적인 운영관리를 위한 기초자료 제공을 위하여, 최근 에너지사용 동향과 제로에너지수준을 다양한 방면에서 분석하였으며, 학교시설에 적용된 BEMS의 효과 및 사용자 의견을 조사하였다.

• 한국환경과학회지
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• 제32권6호
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• pp.419-428
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• 2023

This study estimates the greenhouse gases (GHGs) emissions from energy sector of Changwon city from 2012 to 2020 and scenario analysis of GHGs reductions pathways in the context of the goal of 2030 NDC and 2050 carbon neutral scenario in Korea. As a result, the GHG emissions as a reference year of carbon neutral in 2018 were estimated as 8,872,641 tonCO_2eq accounting for 3,851,786 tonCO_2eq (43.6%) of direct source (scope 1) and 4,975,855 tonCO_2eq (56.4%) of indirect source (scope 2). Especially, among indirect sources as purchased electricity, manufacturing sector emitted the largest GHG accounting for 33.0%(2,915 thousands tonCO_2eq) of the total emissions from all energy sectors, scenario analysis of GHG reductions potential from the energy was analyzed 8,473,614 tonCO_2eq and the residual emissions were 354,027 tonCO_2eq. Purchased electricity and industry sector reducted the largest GHG accounting for 58.7%(4,976 thousands tonCO_2eq) and 42.1%(3,565 thousands tonCO_2eq) of the total emissions from all energy sectors, respectively.

• Nutrition Research and Practice
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• 제14권6호
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• pp.637-653
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• 2020

BACKGROUND/OBJECTIVES: This study examined the associations between food consumption frequency of Korean adults and self-perceived chewing difficulty, using the food frequency questionnaire (FFQ, 112 items) from 2013-2016 of the Korea National Health and Nutrition Examination Survey (KNHANES). SUBJECTS/METHODS: Subjects were divided into not difficult in chewing (NDC) and difficult in chewing (DC) groups, with 24.17% being classified into DC. Males and females consumed 35 and 37 items less frequently than the other sex, respectively. Due to the remarkable gender difference in food consumption, gender-stratified one-sided survey regression analysis was performed after adjusted for the effect of age, household income, and self-rated health status. RESULTS: Thirty-four items of FFQ were significantly less consumed by the DC group. Females exclusively consumed less beverages and alcohol while males showed the same for fruits and milk·dairy products. Consumption frequency of 8 items such as steamed potatoes·grilled potatoes, stir fried beef, other kimchi·fresh vegetable kimchi, orange, sour pork·pork cutlet, tteokbokki and green tea were significant only in males. In contrast, 17 items including cooked rice with other grains and legumes, boiled egg·steamed egg, Korean cabbage kimchi, banana, and tofu stew·soft tofu stew were significant only for females. Finally, items that showed significance for both were 9 items including loaf bread, ready-to-eat cereal, steamed sweet potatoes·grilled sweet potatoes, stir-fried lotus roots·stir-fried burdock, green laver salad·brown seaweed salads, apples, tomato·cherry tomatoes, squid (raw, dried shredded, boiled, stir-fried), and curd type yogurt. CONCLUSIONS: Findings in this study suggest chewing difficulty may be an important nutritional issue that has to be dealt with for healthful food consumption, with distinct interest of gender.

• 한국재료학회지
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• 제24권6호
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• pp.305-309
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• 2014

When sunlight irradiates a boron-doped p-type solar cell, the formation of BsO2i decreases the power-conversion efficiency in a phenomenon named light-induced degradation (LID). In this study, we used boron-doped p-type Cz-Si solar cells to monitor this degradation process in relation to irradiation wavelength, intensity and duration of the light source, and investigated the reliability of the LID effects, as well. When halogen light irradiated a substrate, the LID rate increased more rapidly than for irradiation with xenon light. For different intensities of halogen light (e.g., 1 SUN and 0.1 SUN), a lower-limit value of LID showed a similar trend in each case; however, the rate reached at the intensity of 0.1 SUN was three times slower than that at 1 SUN. Open-circuit voltage increased with increasing duration of irradiation because the defect-formation rate of LID was slow. Therefore, we suppose that sufficient time is needed to increase LID defects. After a recovery process to restore the initial value, the lower-limit open-circuit voltage exhibited during the re-degradation process showed a trend similar to that in the first degradation process. We suggest that the proportion of the LID in boron-doped p-type Cz-Si solar cells has high correlation with the normalized defect concentrations (NDC) of BsO2i. This can be calculated using the extracted minority-carrier diffusion-length with internal quantum efficiency (IQE) analysis.

• 한국도서관정보학회지
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• 제48권3호
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• pp.63-81
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• 2017

이 연구는 사회복지학의 학문적 특성과 분류체계를 비교 분석함으로써, 사회복지학의 분류특성과 문제점을 분석하고 이를 토대로 KDC 제6판 사회복지학의 분류체계 수정 전개 방안을 제시하였으며, 연구결과를 요약하면 아래와 같다. 첫째, 사회복지학의 주요 영역에는 사회복지정책 및 행정을 비롯한 사회복지 일반, 각종 사회사업, 장애인, 아동청소년, 노인, 여성, 가족 등 각 계층이나 집단별 복지서비스가 포함된다. 둘째, 국립중앙도서관의 유별 자료 분석결과, 상대적으로 복지정책 및 행정, 연금, 보호 서비스, 다문화가족을 비롯한 소외계층 지원 등의 주제어에 빈도수가 높게 나타났으며, 이들 항목에 대한 세목을 신설하였다. 셋째, 분류항목의 수정 전개는 원칙적으로 사회복지학의 학문적 특성과 주제어 분석을 바탕으로 하였으며, 혼란을 줄일 수 있도록 가능한 한 기존의 KDC 분류체계를 유지하였다.

• 한국도서관정보학회지
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• 제36권1호
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• pp.353-370
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• 2005

이 연구에서는 KDC 4판에 대한 개정 논의가 공개된 시점에서 KDC 제4판의 역사류(역사, 지리, 전기) 및 관련 보조구분(조기표)에 있어서 DDC, NDC, UDC 및 KDC의 관련부분들을 비교$\cdot$검토하여 KDC 해당 부분의 제반 문제점을 지적한 다음, 그 개선책을 제시함으로써 KDC 제5판의 개정방향을 제시하고자 하는데 그 의의를 두고 있다. 구체적으로는 KDC 4판에서의 역사류(900)를 비롯하여 관련 보조표(지역구분표) 및 해설부분의 모순점이나 오류사항을 지적하면서 바로 잡는 것을 골자로 하여, 지역구분표(조기표)를 현실에 맞게 세분$\cdot$확장하고 역사총괄부분(900)이나 지리총괄부분(980)에 $\lceil$내부보조표$\rfloor$를 신설함으로써 누락되거나 혼잡스러운 부분을 수정$\cdot$보완하였고, 역사류(900), 민속학(380) 등의 세분 전개에 필요한 사람관련 보조표인 $\lceil$민족$\cdot$국가 군구분표$\rfloor$를 신설하였다. 그리고 연구진행에 따라 필요하게 된 분류주기를 해당부분에 구체적으로 설정하였다. 지면 제약으로 인해 일부 세분$\cdot$전개내용은 동일한 전개의 해당 다른 자료(분류표 등)를 안내하는 경우도 있으나 본 연구의 본질적 성격은 개정 시에 실제로 적용될 수 있도록 구체적으로 제시하고자 의도된 것이다.

• Asian Pacific Journal of Cancer Prevention
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• 제15권20호
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• pp.8623-8629
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• 2014

Background: As an important component of the NDC80 kinetochore complex, NUF2 is essential for kinetochore-microtubule attachment and chromosome segregation. Previous studies also suggested its involvement in development of various kinds of human cancers, however, its expression and functions in human hepatocellular carcinoma (HCC) are still unclear. Materials and Methods: In the present study, we aimed to test the hypothesis that NUF2 is aberrant in human HCCs and associated with cell growth. Results: Our results showed significantly elevated expression of NUF2 in human HCC tissues compared to adjacent normal tissues, and high expression of NUF2 in HCC cell lines. Using lentivirus-mediated silencing of NUF2 in HepG2 human HCC cells, we found that NUF2 depletion markedly suppressed proliferation and colony formation capacity in vitro, and dramatically hampered tumor growth of xenografts in vivo. Moreover, NUF2 silencing could induce cell cycle arrest and trigger cell apoptosis. Additionally, altered levels of cell cycle and apoptosis related proteins including cyclin B1, Cdc25A, Cdc2, Bad and Bax were also observed. Conclusions: In conclusion, these results demonstrate that NUF2 plays a critical role in the regulation of HCC cell proliferation and apoptosis, indicating that NUF2 may serve as a potential molecular target for therapeutic approaches.