캡슐화-탈수화-유리화에 의한 국화 품종 '화이트 엔디' 신초의 초저온 동결보존

전수민,김창길,Jeon, Su Min,Kim, Chang Kil 경북대학교 농업과학기술연구소 2014 慶北大農學誌 Vol. No.

본 실험은 국화의 바이로이드 제거에 이용되는 초저온처리 시 국화 품종 'White ND'을 적합한 처리조건을 확립하기 위해 초저온처리의 단계별 요인을 실험하였다. 그 결과 생장점의 크기는 1 mm(엽원기 2~3매 포함)에서 높은 생존율과 신초 재생율을 나타내었고, vitirification 처리시 PVS3가 효과적이었으며, 처리 시간은 60분 처리 하였을 때 높은 생존율 및 정 상 신초 재생율을 보였다. 또한 vitrification을 위한 전처리 조건은 sucrose 농도를 88 mM 24시간, sucrose 0.3 M 16시간, sucrose 0.5 M 6시간, sucrose 0.7 M 3시간으로 처리하는 것이 초저온 처리 후 생존율 및 신초 재생율을 높이는데 효과적이었으며, 재생된 정상 식물체는 모본과 비교하여 ploidy level이 동일한 것으로 보아 식물체의 유전적 변이가 일어나지 않았다. This study investigated the effects of cryopreserving Chrysanthemum morifolium cv. 'White ND' shoot tips for eliminating viroids. As a result, smaller shoot tips (2-3 LP, 1mm) showed a better survival and regrowth than larger shoot tips (4-5 LP, 1.5mm). The most effective vitrification solution for survival and regrowth was PVS3, which induced a high survival rate after 60 minutes of incubation. For a high efficiency, the best pre-treatment condition for vitrification was incubation in 88 mM sucrose for 24 h, 0.3M sucrose for 16 h, 0.5 M sucrose for 6 h, and 0.7 M sucrose for 3 h, in a descending order. The ploidy levels were the same in the mother plants and following cryopreservation, which confirmed the absence of any gene mutation.

수열합성법으로 성장된 산화아연 나노막대의 특성 및 열처리 효과

전수민,김민수,김군식,조민영,최현영,임광국,김형근,이동율,김진수,김종수,이주인,임재영,Jeon, Su-Min,Kim, Min-Su,Kim, Ghun-Sik,Cho, Min-Young,Choi, Hyun-Young,Yim, Kwang-Gug,Kim, Hyeoung-Geun,Lee, Dong-Yul,Kim, Jin-Soo,Kim, Jong-Su,Lee, Joo 한국진공학회 2010 Applied Science and Convergence Technology Vol.19 No.4

수열합성법으로 실리콘 (111) 기판 위에 산화아연 나노막대를 성장하였다. 산화아연 나노막대를 성장하기 전, 실리콘 기판에 스핀코팅법으로 씨앗층을 성장하였다. 산화아연 나노막대는 오토클레이브(autoclave)로 $140^{\circ}C$에서 6시간 동안 성장하였고, 아르곤 분위기에서 300, 500, $700^{\circ}C$의 온도로 20분 동안 열처리하였다. X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), photoluminescence (PL)를 이용하여 열처리한 산화아연 나노막대의 구조적, 광학적 특성을 분석하였다. 모든 산화아연 나노막대 시료에서 c-축 배향성을 나타내는 강한 ZnO (002) 회절 피크와 약한 ZnO (004) 회절 피크가 나타났다. 열처리 온도가 증가함에 따라 산화아연 나노로드의 residual stress는 compressive에서 tensile로 변하였다. Hexagonal 형태의 산화아연 나노로드를 관찰하였다. 산화아연 나노로드의 PL 스펙트럼은 free-exciton recombination에 의해 3.2 eV에서 좁은 near-band-edge emission (NBE) 피크와 산화아연 나노막대의 결함에 의해 2.12~1.96 eV에서 넓은 deep-level emission (DLE) 피크가 나타났다. 산화아연 나노막대를 열처리함에 따라, NBE 피크의 세기는 감소하였고 DLE 피크는 열처리에 의해 발생한 산소 관련 결함에 의하여 적색편이 하였다. Vertically aligned ZnO nanorods on Si (111) substrate were prepared by hydrothermal method. The ZnO nanorods on spin-coated seed layer were synthesized at $140^{\circ}C$ for 6 hours in autoclave and were thermally annealed in argon atmosphere for 20 minutes at temperature of 300, 500, $700^{\circ}C$. The effects of the thermal annealing on the structural and optical properties of the grown on ZnO nanorods were investigated by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), photoluminescence (PL). All the ZnO nanorods show a strong ZnO (002) and weak (004) diffraction peak, indicating c-axis preferred orientation. The residual stress of the ZnO nanorods is changed from compressive to tensile by increasing annealing temperature. The hexagonal shaped ZnO nanorods are observed. The PL spectra of the ZnO nanorods show a sharp near-band-edge emission (NBE) at 3.2 eV, which is generated by the free-exciton recombination and a broad deep-level emission (DLE) at about 2.12~1.96 eV, which is caused by the defects in the ZnO nanorods. The intensity of the NBE peak is decreased and the DLE peak is red-shifted due to oxygen-related defects by thermal annealing.

컨테이너 터미널에서의 AGV의 교착방지를 위한 주행영역 예약 표 작성방법

전수민,김갑환,Jeon, Su-Min,Kim, Kap-Hwan 한국시뮬레이션학회 2008 한국시뮬레이션학회 논문지 Vol.17 No.3

본 연구는 컨테이너 터미널에서 사용될 수 있는 교착방지를 위한 알고리즘 개발을 목표로 하였다. 기존의 교착방지 알고리즘은 많은 계산시간을 소요한다는 단점을 극복하기 위하여 본 연구에서는 하나의 경로에 대해서 예약스케줄을 작성하여 두고 반복적으로 사용하는 예약 스케줄 표 방식을 제안하였다. 시뮬레이션 실험 결과 예약 스케줄 표 방식은 그때그때의 주행경로에 대한 예약스케줄링을 위하여 계산시간이 필요 없기 때문에 AGV의 실시간 운영을 위하여 유용한 방식임을 알 수 있었다. Automated Guided Vehicles (AGVs) are important equipment in automated container terminals. To utilize AGVs for transporting containers from a position to another, the deadlock is a serious problem that must be solved before they are deployed to real operations. This study assumes that traveling area for AGVs are divided into a large number of grid-blocks and, as a method of traffic control, grid-blocks are reserved in advance during the travel of AGVs. The purposes of the reservation are to make the room between AGVs and to prevent deadlocks. Because the size of an AGV is much larger than the size of a grid-block on guide paths, this study assumes an AGV may occupy more than one grid-block at the same time. This study suggests a method for constructing a table of reservation schedules by using a simulation. A sensitivity analysis was conducted to evaluate the performance of the reservation method in this study.

학교 건축물 에너지성능의 건축설계 사양에 따른 학교급 조절효과 분석

전수민(Sumin Jeon),최경석(Gyeong-seok Choi),강재식(Jae Sik Kang) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6

이 연구에서는 학교급(초등학교, 중학교, 고등학교)에 따라 난방에너지요구량에 영향을 미치는 건축설계 사양의 차이가 있는지 검증하기 위하여 2015년부터 2018년까지 건축물 에너지효율등급을 취득한 학교건축물의 ECO2 평가 입출력 데이터를 분석하였다. 분석 절차는 첫째, 학교급별 난방에너지요구량 분산 분석을 통해 건축설계와 관련된 에너지성능이 학교급에 따라 동일함을 증명하였다. 둘째, 건축설계 요인에 따른 학교급의 조절효과분석을 통해 에너지성능에 대한 학교급별 부위별 열관류율, 향별 창면적비, 부위별 평균열관류율의 설계 사양의 차이가 없으나 학교급에 따른 침기율의 사양의 차이가 있음을 증명하였다. 이 연구는 근래의 신축 학교의 학교급별 건축설계 사양의 유사성을 통계적으로 증명한 것에 그 의의가 있다.

콘크리트용 순환잔골재 밀도 및 흡수율 품질기준 변경 전후 사후관리 시험결과 비교

전수민(Soo-Min Jeon) 한국산학기술학회 2023 한국산학기술학회논문지 Vol.24 No.4

건설폐기물 중간처리업자가 처리하는 순환골재 중 국토교통부에서 정한 품질기준을 충족하는 특정 용도의 골재는 사업장심사 및 품질시험을 거쳐 품질인증 받을 수 있다. 품질인증용도는 도로보조기층용 골재, 콘크리트용 굵은골재, 콘크리트용 잔골재 및 아스팔트콘크리트용 골재 총 4종인데 이중 콘크리트용 잔골재의 품질시험 합격률이 상대적으로 낮고, 동 잔골재의 9가지 품질항목 가운데 밀도 또는 흡수율이 부적합한 경우가 가장 많은 것으로 알려져 있으며, 상기 취약한 두 품질항목에 대하여 국토교통부는 2017년 12월 품질기준을 강화한 바 있다. 본 논문의 목적은 콘크리트용 순환 잔골재의 밀도 및 흡수율 품질시험결과가 어느 정도 부적합한 지 실제 사후관리결과를 구체적으로 살펴보고 상기 기준 강화 전후 품질시험결과를 비교분석하여 기준 강화 이후 두 품질항목에 대한 유의미한 품질향상이 이루어졌는지 살펴보는 것이다. 품질인증 받은 순환잔골재에 대한 기준 강화 전후 각 3년간의 사후관리 품질시험 결과를 비교분석한 결과, 기준 강화 이후 상향된 기준 적용에 따라 밀도 및 흡수율 항목의 합격률은 다소 감소한 것으로 나타났으나 밀도 및 흡수율 물성 자체의 경우 통계적으로 유의미한 품질향상이 이루어진 것으로 나타났다. Among recycled aggregates treated with intermediate processors of construction waste, some are used for special purposes. These aggregates satisfy the quality standard designated by the Ministry of Land, Infrastructure, and Transport (Korea) and can be certified through workplace inspections and quality testing. There are four types of aggregates for quality certification, i.e., aggregate for road auxiliary layers, aggregate for concrete, fine aggregate for concrete, and aggregate for asphalt concrete. Among them, fine aggregate for concrete has a relatively low passing rate of quality testing. It has been noted as inappropriate in terms of the density and absorption rate among the nine quality criteria. In response to this low-quality performance, the Ministry of Land, Infrastructure, and Transport has strengthened the quality standard since December 2017. This study entailed a detailed review of the actual post-operative care and quality testing results of the fine aggregate recycled for concrete. These tests measured the extent of the inappropriateness of density and absorption rate. The quality testing results before and after the aforementioned standard revision were analyzed to determine whether the two criteria achieved significant quality improvement. A comparison of the post-operative quality tests over three years, before and after each revision of the standard, showed that the passing rate for density and absorption rate had decreased slightly, owing to the increased standard. Nevertheless, significant quality improvement was achieved for the two material properties.

양파 껍질 추출물을 함유한 안면 마스크 팩의 주름 개선 효과

전수민(Soo-Min Jeon),최문희(Moon-Hee Choi),이용조(Yong-Jo Lee),신현재(Hyun Jae Shin) 한국생물공학회 2013 KSBB Journal Vol.28 No.6

In this study, the domestic onion skin has been used to investigate the anti-wrinkle effect of the ethanolic extract. The onion skin has been known to contain a large amount of antioxidant including quercetin. Solvent extraction by 80% ethanol was carried out of the onion skin. The high amount of quercetin have been identified using HPLC as a bioactive compound. The extraction yield of the quercetin increased according to temperature up to 80℃. Two different antioxidant assays (DPPH and ABTS) were performed to determine the free-radical scavenging activity of onion skin extracts. The antioxidant activities (EC50 of DPPH) of the vitamin C and the onion extracts were 2.2 and 5.09 μg/mL, respectively. The results of ABTS tests were 2.33 (of vitamin C) and 2.40 μg/mL (of the onion extracts), respectively. In a clinical study, a panel of 10 female volunteers between the ages of 30 and 40 (mean age: 42 years) was given a mask pack containing 1% of this extracts for 4 weeks. It was shown that a highly significant reduction in the deep and moderate wrinkled was obtained with those treated with this onion extracts as compared to the control group. The reduction in deep wrinkles increased with time. Eye wrinkle were reduced statistically significant (p<0.05). The application of the proper topical cream and mask pack containing onion skin extracts has therefore shown to be effective enhancing anti-wrinkle activities.

콘크리트용 순환굵은골재 품질인증에 대한 사후관리심사와 품질시험 결과 고찰

전수민 ( Soomin Jeon ) 한국폐기물자원순환학회 2021 한국폐기물자원순환학회지 Vol.38 No.6

The recycled coarse aggregates for concretes that meet the quality standards set by the Ministry of Land, Infrastructure, and Transport are certified based on the audit and test results. After certification, follow-up management which includes audits and tests are conducted every year. In this paper, the correlation between the audit and the test results was examined. Specifically, it was examined whether the audit of coarse aggregates conducted in 2020 had a significant relationship with the suitability of each inspection item and the quality test results. Finally, it was found that there was a significant relationship between the overall audit results and the test results.

BIM 모델상세수준 및 개발수준(LOD)에 따른 에너지성능지표(EPI) 평가가능항목 도출 연구

전수민(Sumin Jeon),최경석(Gyeong-seok Choi) 대한설비공학회 2021 설비공학 논문집 Vol.33 No.11

This study was conducted to determine performance evaluation items in terms of Level of Detail and Level of Development in BIM (Building Information Modeling) so that EPI (Energy Performance Index) scoring could be estimated in the architectural design process using BIM. First, a flow chart to check EPI scoring standards and mandatory criteria by building types was drawn based on current regulations. Second, requirements for users (input information) and systems (information and points to be automatically generated) by Level of Detail were derived based on previous studies and scoring requirements of architectural items on EPI. Third, a checklist to check the timing for adopting and scoring of architectural items in EPI by Level of Development were deduced using results from the previous step. This study provides ways to optionally adopt method for building energy efficiency in architectural design process. It can be used as a basic knowledge of system requirements to introduce rule checking of EPI in BIM.

한국의 기능적 소득분배와 총수요:

전수민(Jeon, Su-Min),주상영(Joo, Sang-Yong) 한국사회경제학회 2016 사회경제평론 Vol.29 No.3

한국경제는 임금주도체제인가 이윤주도체제인가. 이에 대한 판정 여부도 중요하지만 그 정도를 가늠해 보는 것도 중요하다. 성장체제의 전환 가능성을 고민하는 관점에서 더욱 중요한 문제로 부각되기 때문이다. 본 연구는 국내외 선행연구에서 가장 많이 사용된 바 있는 Hein and Vogel(2008)의 단일 방정식 접근에 따라 한국경제의 임금주도성 여부를 재검토해 보았다. 보정 된 분기별 노동소득분배율을 이용하여 외환위기 전후를 분석한 결과, 노동소득분배율 1%p 상승이 위기 이전에는 총수요를 0.08%p 증가시키지만, 위기 이후에는 0.26%p 증가시키는 것으로 나타났다. 위기 이전과 이후 모두임금주도성을 보이지만, 고도성장을 감안하면 위기 이전에는 임금주도성이 거의 없는 것이나 다름없다. 그러나 잠재성장률의 하락 등 저성장 기조로 접 어든 위기 이후의 기간에 대한 해석은 달라질 수밖에 없다. 그 전에 비해 임금주도성이 비교할 수 없을 정도로 강화된 것이다 Is the Korean economy wage-led or profit-led? Judging about that is important, but it is also important as well to gauge the extent. It is especially so when pondering upon the desirability of growth regime switches. In this point of view, we reinvestigated the wage-led property of Korean economy based on the single equation approach of Hein and Fogel (2008) which has been widely used in previous literatures at home and abroad. We modified quarterly labor income shares to see whether the economy shows different characteristics before and after the 1997-1998 currency crisis. We found the 1%p rise in labor share increased the aggregate demand by 0.08%p during the pre-crisis period, and by 0.26%p during the post-crisis period. However, considering remarkably rapid growth before the crisis, we can hardly say that the economy was wage-led in those days. By contrast, the demand effects of labor share seem significantly large in recent economic environment of much slower growth.

한국의 기능적 소득분배의 변화가 총수요에 미치는 영향

전수민(Su-Min Jeon),이기성(Ki-Seong Lee) 한국무역연구원 2021 무역연구 Vol.17 No.4

Purpose - This study reviewed the demand system of the Korean economy through the impact of changes in Korea’s functional income distribution on consumption, investment, and net exports. Design/Methodology/Approach - Although most domestic research studies have identified wage-led demand systems, some research results of profit-led demand systems have also been presented. In particular, the labor income share has been on the decline since the financial crisis. Considering the situation that has turned upward since 2010, we wanted to examine the impact of changes in income distribution on aggregate demand at this time. Findings - The Korean economy is still considered to be a wage-led demand system, but it has weakened somewhat in terms of intensity. In terms of the components of aggregate demand, the consumption effect was somewhat weakened compared to the preceding study, while the investment effect was significant compared to consumption, and the net export effect was still not found to be statistically significant after the financial crisis. Research Implications - Therefore, as improving income distribution contributes to stabilizing domestic demand, the government needs to make policy efforts to break away from low-growth trends through various distribution policies such as tax cuts and subsidies to households and businesses, including self-employed.