고령토의 첨가가 3차원 망상 구조를 가지는 다공성 규조토-고령토 복합재의 기본 특성에 미치는 영향

이채영,이수진,하장훈,이종만,송인혁,문경석,Lee, Chae-Young,Lee, Sujin,Ha, Jang-Hoon,Lee, Jongman,Song, In-Hyuck,Moon, Kyoung-Seok 한국분말야금학회 2020 한국분말재료학회지 (KPMI) Vol.27 No.4

In this study, the effects of kaolin addition on the properties of reticulated porous diatomite-kaolin composites are investigated. A reticulated porous diatomite-kaolin composite is prepared using the replica template method. The microstructure and pore characteristics of the reticulated porous diatomite-kaolin composites are analyzed by controlling the PPI value (45, 60, and 80 PPI) of the polyurethane foam (which are used as the polymer template), the ball-milling time (8 and 24 h), and the amount of kaolin (0-50 wt. %). The average pore size decreases as the amount of kaolin increases in the reticulated porous diatomite-kaolin composite. As the amount of kaolin increases, it can be determined that the amount of inter-connected pore channels is reduced because the plate-shaped kaolin particles connect the gaps between irregular diatomite particles. Consequently, a higher kaolin percentage affects the overall mechanical properties by improving the pore channel connectivity. The effect of kaolin addition on the basic properties of the reticulated porous diatomite-kaolin composite is further discussed with characterization data such as pore size distribution, scanning electron microscopy images, and compressive strength.

충북지역 중북부 중산간지 벼 출수생태형별 적응성 검토

이채영,최예슬,이정관,김익제,강신구,우선희,김영호,Lee, Chae Young,Choi, Ye Seul,Lee, Joung Kwan,Kim, Ik Jei,Kang, Shin Gu,Woo, Sun Hee,Kim, Young Ho 한국작물학회 2021 한국작물학회지 Vol.66 No.3

최근 지구온난화에 의해 기온이 상승하여 조생종을 주로 재배하는 중북부중산간지대에 중생종과 중만생종의 적응성을 검토하기 위해서 출수생태형별로 이앙시기를 달리해서 조생종 오대, 중생종 청품, 중만생종 삼광을 제천의 농가포장에서 시험한 결과는 다음과 같다. 1. 벼 생육에 영향을 미치는 기상요소 중 평균기온은 2010년대에 8월까지는 가장 높았고, 다른 시기보다 월별로 0.7~0.9℃가 높았으며, 일조시간은 장마, 태풍 등으로 인한 기상이변으로 가장 낮은 수준이었다. 2. 지난 35년간 오대의 지역적응시험 결과 출수기는 점점 빨라지고 있으며, 이앙부터 출수기까지 재배일수가 짧아져 간장과 수수가 감소되었다. 과거보다 등숙률은 최대 10%, 천립중은 2 g 이상 증가되었으나, 품질과 직결되는 출수 후 40일간 평균기온은 많게는 2℃ 이상 증가되었다. 3. 제천지역 안전출수한계기는 출수 후 40일간 적산온도 880℃ 기준으로는 8월 11일, 840℃ 기준으로는 8월 15일로 분석되었다. 4. 이앙시기별 출수생태형에 따라 생육은 비슷하였으나 이앙시기별 최고, 최저 수준을 비교한 등숙률은 조생종 6.5%, 중생종 3.7%, 중만생종 2.5% 높았다. 쌀수량은 조생종 83 kg, 중생종 113 kg, 중만생종 47 kg 많았으며, 완전미율은 조생종 17.8%, 중생종 3.2%, 중만생종 5.0% 높았다. 5. 중북부중산간지에서 안전출수한계기 및 완전미수량을 고려한 이앙시기는 조생종은 6월 15일, 중생종은 6월 5일, 중만생종은 5월 25일이었으며, 본 시험 지역(IV-1)에서도 온난화로 인해 중생종과 중만생종이 안정적으로 재배될 수 있을 것으로 예상된다. In recent years, air temperature has been increasing rapidly compared to the 1980s because of global warming. This increase in temperature reduces the yield and quality of rice; therefore, measures are needed to prevent such effects and ensure food security. The early maturing type (EMT) of rice is mainly cultivated in the central northern mid-mountainous area (CNMA). This study was conducted to shift the transplanting date of EMT and to examine the adaptability of the mid-maturing type (MMT) or mid-late maturing type (MLMT) in the Jecheon region of the CNMA to address global warming. The air temperature increased by 0.7-0.9℃ in the 2010s, compared to that in the 1980s, and was similar to other decades during the ripening period. Over the past 35 years, considering rice quality, the heading date of the Odae variety has arrived sooner by approximately 10 days, the ripened grain ratio has increased by more than 10%, and the thousand grain weight; however, the mean temperature at 40 days after heading has increased by more than 2℃. The late marginal heading date in the Jecheon region was determined as August 11 based on the accumulated temperature of 880℃ and August 15 based on 840℃ for 40 days after heading. According to different transplanting dates, milled rice yield per 10 a was the highest at 567 kg with June 10 in EMT, 595 kg with June 10 in MMT, and 572 kg with May 30 in MLMT. Considering the late marginal heading date, rice yield, and quality, the optimum transplanting date was June 15 in EMT, June 5 in MMT, and May 30 in MLMT in the Jecheon region of CNMA. Owing to global warming, MMT and MLMT are expected to be reliably cultivated in the CNMA.

토양검정법을 활용한 충북지역 ALS 저해제 제초제 저항성 논잡초 발생 현황

이채영,최예슬,이희두,김영호,홍성택,우선희,이정란,Lee, Chae Young,Choi, Ye Seul,Lee, Hee Doo,Kim, Young Ho,Hong, Seong Taek,Woo, Sun Hee,Lee, Jeongran 한국잡초학회 한국잔디학회 2018 Weed & Turfgrass Science Vol.7 No.3

본 연구는 2017년 2월부터 4월까지 충북지역 제초제 저항성 논잡초 발생현황을 조사하기 위하여 11개 시 군 289지점에서 토양시료를 채취하였다. 충북지역의 제초제 저항성 논잡초의 발생을 조사한 결과, 시 군별 최우점 잡초는 물달개비이었고, 그 다음은 강피였다. 충북지역의 제초제 저항성 잡초 발생비율과 면적은 각각 80.6%, 28,272 ha로 지난 2012년 보다 3배 증가하였다. 옥천군의 저항성 발생율이 93.8%로 가장 높았고, 충주시, 보은군, 영동군, 진천군과 괴산군이 80% 이상, 청주시, 음성군, 증평군이 70% 이상으로 높은 수준이었다. 발생면적은 청주시가 6,957 ha로 가장 많았고, 충주시, 진천군, 보은군, 음성군의 순으로 높았다. 초종별 제초제 저항성 비율과 면적은 물달개비 49%, 17,646 ha, 강피 44%, 15,617 ha, 올챙이고랭이 29%, 10,377 ha의 순으로 발생하였다. 충북지역 모든 지역에서 물달개비와 강피는 acetolactate synthase (ALS) 저해제 제초제에 저항성이 40% 이상이므로 집중적인 관리가 필요하며, 현재 설포닐우레아계 제초제 사용이 증가하고 있고, 대부분의 농가가 이앙 후 10일 이전에 제초제를 사용하기 때문에 이앙 후에도 관리가 필요하며, 매년 적용 제초제를 교호 살포하는 방법으로 제초제 저항성 잡초의 발생을 줄여야 하겠다. This study was conducted to investigate the occurrence of an acetolactate synthase (ALS) inhibiting herbicide resistant weed on paddy at 289 sites by soil sampling in Chungcheongbuk-Do of Republic of Korea from February to April in 2017. The most dominant weed was Monochoria vaginalis and Echinochloa oryzicola on each city and county. ALS inhibiting herbicide resistant ratio and occurrence area were 80.6% and 28,272 ha, respectively, in Chungcheongbuk-Do which was 3 times than in 5 years ago. The herbicide resistant ratio, Okcheon-Gun was the highest at 93.8%, Chungju-Si, Boeun-Gun, Yeongdong-Gun, Jincheon-Gun and Geosan-Gun were over 80%, Cheongju-Si, Eumseong-Gun and Jeungpyeong-Gun were over 70%. The herbicide resistant area, Cheongju-Si had the largest at 6,957 ha, Chungju-Si was 4,277 ha, Jincheon-Gun and Boeun-Gun was 3,536 ha and 3,282 ha, respectively. By weed, ALS inhibiting herbicide resistant ratio and occurrence area, Monochoria vaginalis was 49%, 17,646 ha, Echinochloa oryzicola 44%, 15,617 ha, Schoenoplectiella juncoides 29%, 10,377 ha, respectively. In all cities and counties of Chungcheongbuk-Do, Monochoria vaginalis and Echinochloa oryzicola are more than 40% resistant to ALS inhibiting herbicides, intensive management is required. The use of sulfonylurea herbicides is increasing, most farmers use herbicides 10 days after transplanting, so management after transplanting is necessary and the occurrence of herbicide resistant weeds should be reduced by alternating herbicide application every year.

충북지역 쌀가루용 벼 품종의 이앙시기가 생육, 수량 및 수발아 발생에 미치는 영향

이채영,최예슬,이희두,정택구,김익제,김정곤,우선희,Lee, Chae-Young,Choi, Ye-Seul,Lee, Hee-Du,Jeong, Taek-Gu,Kim, Ik-Jei,Kim, Chung-Kon,Woo, Sun-Hee 한국작물학회 2020 한국작물학회지 Vol.65 No.4

Rice consumption in Korea has been decreasing as the eating habits of the Korean people have diversified with rapid economic growth. Recently, floury endosperm rice cultivars were developed to boost rice consumption and replace wheat flour consumption with rice flour, which is vulnerable to viviparity under wet weather during the grain-filling stage because of its loosely packed starch granule structures. To overcome this limitation, it is necessary to find a suitable rice transplanting date to produce high-quality rice flour by altering the heading ecology type and changing the cultivation time by region. We examined four floury endosperm rice cultivars (FERC) in the Cheongju (central plain area) and Boeun (mid-mountainous area) regions of Korea from 2017 to 2019. Of the FERCs, the mid-late maturing types (MMT) Seolgaeng (SG), Hangaru (HGR), and Shingil (SGL) exhibited high yield and yield components after transplanting May 30 in both regions; the early maturing type (EMT) Garumi 2 (GRM2) also exhibited high yield after transplanting June 20 in Cheongju. In addition, MMTs showed the same tendency as the characteristics shown in Cheongju when grown in the Boeun region, and EMT displayed high yield and yield components after transplanting June 10. The FERCs could easily present pre-harvest sprouting in the rainy season during the grain-filling stage after 20 days post-heading because the mean temperature and frequency of more three-day rainfalls have increased over the last 5 years from the previous annual averages. Viviparity of HGR and GRM2 decreased as the transplanting date was delayed, with decreases of 2.3%-4.6% in HGR and 11.9%-23.1% in GRM2 according to the region. SGL was generally resistant to viviparity because of the Tongil type. To minimize pre-harvest sprouting and produce high yield of rice flour in the Chungbuk province, the most suitable transplanting time was the end of May in MMT and the middle and end of June in EMT.

Living Building Challenge의 하수처리시스템에 대한 미생물 연료전지의 응용

이채영,한선기,Lee, Chae-Young,Liu, Hong,Han, Sun-Kee 한국환경보건학회 2013 한국환경보건학회지 Vol.39 No.5

Objectives: This study was conducted to investigate the application of microbial fuel cells (MFCs) to the wastewater treatment systems employed in the Living Building Challenge. Methods: I reviewed a range of information on decentralized wastewater treatment technologies such as composting toilets, constructed wetlands, recirculating biofilters, membrane bioreactors, and MFCs. Results: The Living Building Challenge is a set of standards to make buildings more eco-friendly using renewable resources and self-treating water systems. Although there are various decentralized wastewater treatment technologies available, MFCs have been considered an attractive future option for a decentralized system as used in the Living Building Challenge. MFCs can directly convert substrate energy to electricity with high conversion efficiency at ambient and even at low temperatures. MFCs do not require energy input for aeration if using open-air cathodes. Moreover, MFCs have the potential for widespread application in locations lacking water and electrical infrastructure Conclusions: This paper demonstrated the feasibility of MFCs as a novel decentralized wastewater treatment system employed in the Living Building Challenge.

감자의 생육과 잡초발생에 미치는 유기물 멀칭의 효과

이채영,김태중,이광재,Lee, Chae-Young,Kim, Tae-Jung,Lee, Guang-Jae 한국유기농업학회 2010 韓國有機農業學會誌 Vol.18 No.4

This study was carried out to elucidate the effects of mulching materials on the growth of potato and weed control at the experimental farm of Chungbuk National University from August 9 in 2008 to June 28 in 2009. Tested potato, cv. 'Superior', was grown under the different mulching materials such as pine tree leaf, oak tree leaf, rice straw, rice hull and sawdust, and control(non-mulching). We tested two times with autumn and spring culture season. The obtained results from this study were summarized as follows; There was significantly difference in plant height, stem length, leaf length, leaf weight and tuber weight in pine tree leaf mulching treatment in autumn season among the treatments. The dominant weeds were Echinochioa crus-galli var. fadmerntacca and Cyperus amvuricus in autumn culture season, while were Echinochioa crus-galli var. fadmerntacca and Digitaria sanguinalis in spring culture season. The appearance of weeds in all of mulching treatment was significant reduced compared to control. The soil moisture content was the highest in rice hull mulching treatment, and that of mulching treatments was significantly higher than control. The soil temperature of mulching treatments was lower than that of control by from $1.0^{\circ}C$to $2.8^{\circ}C$ in autumn season and from $0.7^{\circ}C$ to $2.3^{\circ}C$ in spring season. The soil temperature was low in the order of pine tree leaf, rice straw, oak tree leaf, rice hull, sawdust, and control. 몇 가지 멀칭 재료가 감자의 생육과 잡초 방제에 미치는 영향을 구명코자 충북대학교 부속농장에서 2008년 8월 9일부터 2009년 6월 28일까지 수행하였다. 시험 품종은 '수미'였으며, 솔잎, 참나무잎, 짚, 왕겨, 톱밥 멀칭과 대조구(무멀칭) 등 6처리를 하였다. 재배시기에 따라 가을재배와 봄재배로 구분하였다. 본 연구 결과를 요약하면 다음과 같다. 가을감자의 초장, 경장, 엽장, 엽중, 괴경중은 솔잎 멀칭구에서 다른 처리와 유의성을 나타냈다. 가을감자 재배시 우점 잡초는 돌피, 명아주이었으며, 봄감자 재배시 우점 잡초는 돌피, 방동사니이었다. 멀칭에 따른 잡초 발생 억제 효과는 모든 멀칭구가 대조구와 유의성을 나타냈다. 수분함량은 왕겨 멀칭구에서 가장 높아 대조구와 차이를 나타냈다. 멀칭 처리구의 지온은 대조구에 비해 가을감자 재배시 $1.0{\sim}2.8^{\circ}C$ 낮았고, 봄감자 재배시 $0.7{\sim}2.3^{\circ}C$ 낮았다. 멀칭재료에 따른 지온은 솔잎 멀칭구, 짚 멀칭구, 낙엽 멀칭구, 왕겨 멀칭구, 톱밥 멀칭구, 대조구 순으로 낮았다.

충북지역 수집 제초제 저항성 강피의 밀도가 벼 출수생태형에 따른 생육 및 수량에 미치는 영향

이채영(Lee Chae Young),최예슬(Choi Ye Seul),정택구(Jeong Taek Gu),김익제(Kim Ik Jei),김영호(Kim Young Ho),김정곤(Kim Chung Kon),김진원(Kim Jin Won),강신구(Kang Shin Gu) 한국잡초학회 2020 한국잡초학회 별책(학술대회 초록집) Vol.40 No.1

매몰지 내 유기물 농도가 분해 속도에 미치는 영향

이채영(Chae-Young Lee),최재민(Jae-min Choi),오승준(Seung-Jun Oh_,한선기(Sun-kee Han),박준규(Joon-Kyu Park) 유기성자원학회 2013 유기물자원화 Vol.21 No.1

회분식 실험을 통해 매몰지 내 유기물의 농도가 분해 속도에 미치는 영향을 평가하였다. 기질은 돈 및 우육을 이용하였으며 기질의 농도는 2, 4, 6, 8 및 10 g VS/L로 선정하였다. 기질의 농도가 2 g VS/L 일 경우에 돈 및 우육의 메탄 발생율 각각 46.3 및 48.4 ml CH4/g VS.d 로 가장 높게 나타났으며 기질의 농도가 증가할수록 메탄 발생율은 감소하였다. 비선형 저해 방정식을 이용하여 평가된 저해 상수 값은 돈육의 경우, n 및 m은 각각 4.9 및 0.6으로 나타났으며 우육은 각각 1.1 및 0.4로 나타났다(n: 최대 메탄 발생율 저해 상수, m: 최종 메탄 수율 저해 상수). 기질의 농도가 증가할수록 메탄 발생율은 민감하게 반응하였으나 최종 메탄 수율은 상대적으로 둔감하게 반응하였다. 또한, 돈 및 우육의 n과 m 값 관계를 통해 기질 농도에 따른 저해 특성은 반경쟁적 저해 특성으로 판단된다. The effect of organic substance on its degradation rate in burial site was investigated using batch tests. Substrate were swine and cattle with the initial concentrations of 2, 4, 6, 8, and 10 g VS(volatile solids)/L, respectively. The highest methane production rates of swine and cattle were found at 2 g VS/L as 46.3 and 48.4 ml CH4/g VS.d, respectively. As substrate concentration increased, the methane production rate decreased. The inhibition constants were n and m that were estimated using nonlinear inhibition model. The values of n and m were inhibition constants of methane production rate and ultimate methane yield, respectively. The values of n and m were 4.9 and 0.6 on swine and 1.1 and 0.4 on cattle. The methane production rate was responded sensitively by increase and decrease of substrate concentration, whereas ultimate methane yield do not relatively. From a relation between n and m, inhibitory effect of substrate concentration was confirmed as uncompetitive inhibition.

포스터 발표 : 상수처리 ; 여과지 유출수 처리를 위한 오존 접촉조의 컴퓨터 기반 설계 기법

이채영 ( Chae Young Lee ),김두일 ( Doo Il Kim ),이중우 ( Joong Woo Lee ),윤범한 ( Bum Han Yoon ),( Jae Hong Kim ) 대한상하수도학회 2005 공동추계 학술발표회 논문집 Vol.2005 No.-

웹툰에 재현된 재난 서사의 특성과 의미 - 웹툰 〈좀비가 되어버린 나의 딸〉을 중심으로-

이채영(Lee, Chae-Young) 우리문학회 2021 우리文學硏究 Vol.- No.72

본고는 재난을 소재로 한 웹툰 중 <좀비가 되어버린 나의 딸>을 중심으로, ‘좀비바이러스’로 인해 야기된 재난과 이에 대한 대응 양상, 또 재난을 바라보는 개개인의 인식과 태도, 이러한 개인에 지대한 영향을 미치는 사회적 맥락을 고찰하는 목적에서 시작되었다. 본 연구의 내용을 요약하면 다음과 같다. 첫째, <좀비 딸>에 재현된 ‘좀비 서사’를 5단계로 구분하고 <좀비 딸>에서 독자적으로 드러나는 서사의 특징을 파악하였다. 둘째, 재난의 변천 과정을 살펴보고, 이를 통해 재난에 대한 국가의 대응과 개인의 대응의 간극, 그리고 그 의미를 고찰하고자 하였다. 나아가 웹툰 <좀비 딸>이 제시한 좀비에 대한 새로운 관점과 좀비 서사, 나아가 재난 서사의 다양화 가능성을 살펴보고자 하였다. 연구 결과, <좀비 딸>에서는 좀비와의 공존, 연대를 다양하게 모색하고 이를 개인 정환의 재난에 대한 대응으로 재현하였다. 한편, 이와는 극명하게 대비되는 국가의 대응 방식을 함께 묘사하여 좀비에 대한 개인과 사회의 관점, 규정에 문제를 제기하였다. 이러한 문제 제기는 좀비, 나아가 다양한 ‘재난’에 대한 개인과 사회의 관점과 규정, 그리고 대응 양상과 과정의 변화에 대한 인식을 확장하고, 일시적으로 봉합되었던 재난과 관련된 문제들에 대한 논의를 공론화하는 역할을 하였다. This study examined the disasters caused by a “zombie virus,” analyzed the responses, individual perceptions, and attitudes toward themse disasters, and analyzed the social context and its profound impact on the characters in disaster-themed webtoons, focusing on “My Daughter Turned Into a Zombie.” The contents of this study can be summarized as follows. First, the study classified the zombie narratives reproduced in “Zombie Daughter” into five levels and identified the characteristics of the narrative that “Zombie Daughter” reveals independently. Second, the transition process of a disaster, the gap between the national and individual responses to the disaster, and its meaning were considered. Moreover, this study investigated the new perspective on zombies and zombie narratives presented in the webtoon “Zombie Daughter,” and considered the possibility of the diversification of disaster narratives. As a result of the study, "Zombie Daughter" sought various coexistence and solidarity with zombies and reproduced them as a response to the disaster of individual Junghwan. On the other hand, by describing the state"s sharply contrasting response method together, problems were raised in individual and social perspectives and regulations on zombies. These issues played a role in expanding awareness of zombies, individual and social perspectives and regulations on various "disasters", and changes in response patterns and processes, and publicizing discussions on temporarily sealed disaster-related issues.