SENTINEL-2 위성영상을 이용한 조림 특성 조사: 세미양오름를 통한 사례 연구

정용석,윤성욱,허성,김윤석,안진현,한경덕,Chung, Yong Suk,Yoon, Seong Uk,Heo, Seong,Kim, Yoon Seok,Ahn, Jinhyun,Han, Gyung Deok 한국환경과학회 2022 한국환경과학회지 Vol.31 No.9

Global warming affects forests and their ecology. Diversity in the forest is a buffer that reduces the damage due to global warming. Mixed forests are ecologically more valuable as versatile habitats and are effective in preventing landslides. In Korea, most forests were created by simple afforestation with trees of evergreen species. Typically, evergreen trees are shallow-rooted, and deciduous trees are deep-rooted. Mixed forest tree roots grip the soil effectively, which reduces the occurrence of landslides. Therefore, improving the distribution of tree types is essential to reduce damage due to global warming. For this improvement, the investigation of tree types of the forest is needed. However, determining the tree type distribution of forests that are spread over wide areas is labor-intensive and time-consuming. This study suggests effective methods for determining the distribution of tree types in a forest that is spread across a relatively wide area. Using normalized difference vegetation index and RGB images from unmanned aerial vehicles, each evergreen and deciduous tree, and grassland area can be distinguished. The distinguished image determines the distribution of tree type. This method is effective compared to directly determining the tree type distribution in the forest by the use of manpower. The data from these methods could be applied to plan a mixed forest or to prepare for future damage due to global warming.

Oral Administration of Camelina Oil Effects on Body Weight and Serum Lipid of Mice

Yong Suk Chung(정용석),Jung Ran Choi(최정란),Sanghyeob Lee(이상협) 한국생물공학회 2019 KSBB Journal Vol.34 No.1

The seed of Camelina sativa is emerging as a good source of α-linolenic acid with enhanced vitamin E content. Therefore, we investigated health beneficial effects of camelina oil for utilization of food ingredient. In this study, we administrated orally camelina oil with normal (ND) and high-fat diet (HFD) feeing on mice and analyzed their effects on lower body weight gain, serum lipid profiling including total cholesterol (TC), triglyceride (TG), high-density lipoprotein (HLD), and low-density lipoprotein (LDL). In ND feeding mice, oral administration of camelina oil showed significantly lower body weight gain after two weeks compare to lack of camelina oil supplement, although the effect of body weight gain was not shown in HFD feeding mice. Camelina oil also effects on lipid profiles of mice serum. The levels of TC were significantly decreased by the camelina oil supplementation in ND feeding mice. These results suggested that camelina oil supplementation with moderate-fat consumption might have health benefits in body weight control and blood lipid profiles.

분산제어 구조에서의 트래픽 처리 능력 고찰

정용석(Yong Suk Chung),김필영(Pil Young Kim),김완중(Wan Joong Kim) 대한전자공학회 1987 대한전자공학회 학술대회 Vol.1987 No.11

사과 바이러스 검정을 위한 SYBR Green I 및 TaqMan probe 기반의 real-time PCR 검사법 개발

허성,정용석,Heo, Seong,Chung, Yong Suk 한국작물학회 2020 한국작물학회지 Vol.65 No.4

Virus infections of apples result in lowered commercial qualities such as low sugar content, weakened tree vigor, and malformed fruits. An effective way to control viruses is to produce virus-free plants based on the development of an accurate and sensitive diagnostic method. In this study, real-time PCR assays based on SYBR Green I and TaqMan probes were developed for detecting ASGV, ASPV, and ApMV viruses. These methods can detect and quantify 10³ to 10¹¹ RNA copies/μL of each virus separately. Compared with methods with two different dyes, the SYBR Green I-based method was efficient for virus detection as well as for assay using the TaqMan probe. Field tests demonstrated that real-time PCR methods developed in this study were applicable to high-throughput diagnoses for virus research and plant quarantine.

위성화상을 이용한 고도 1,600 m 이상의 한라산 적설 면적 변화 추적

한경덕,윤성욱,정용석,안진현,이승재,김윤석,민태선,Han, Gyung Deok,Yoon, Seong Uk,Chung, Yong Suk,Ahn, Jinhyun,Lee, Seung-Jae,Kim, Yoon Seok,Min, Taesun 한국환경과학회 2022 한국환경과학회지 Vol.31 No.10

It is necessary to understand the amount of snowfall and area of snow cover of Mt. Halla to ensure the safety of mountaineers and to protect the ecosystem of Mt. Halla against climate change. However, there are not enough related studies and observation posts for monitoring snow load. Therefore, to supplement the insufficient data, this study proposes an analysis of snow load and snow cover using normalized-difference snow index. Using the images obtained from the Sentinel2 satellite, the normalized-difference snow index image of Mt. Halla could be acquired. This was examined together with the meteorological data obtained from the existing observatory to analyze the change in snow cover for the years 2020 and 2021. The normalized-difference snow index images showed a smaller snow pixel number in 2021 than that in 2020. This study concluded that 2021 may have been warmer than 2020. In the future, it will be necessary to continuously monitor the amount of snow and the snow-covered area of Mt. Halla using the normalized-difference snow index image analysis method.

잔디 교잡 품종 개발을 위한 잔디 생존률, 재생산률 및 꽃대 출현률과의 상관관계

한경덕,정지현,정용석,Han, Gyung Deok,Jung, Ji Hyeon,Chung, Yong Suk 한국작물학회 2021 한국작물학회지 Vol.66 No.3

본 연구는 새로운 종자형 잔디 개발을 위한 유전자원의 분석을 통해 기초자료를 제공하고자 수행되었다. 우리나라에 자생하고 있는 조이시아그래스종 잔디는 주로 포복경이나 지하경을 통해 번식하며, 자연적으로 발아가 잘 되지 않아 종자형 육종을 잘 이루어지지 않고 있었다. 하지만 종피 처리 기술이 개발된 이후, 종자형 잔디 개발이 이루어지고 있다. 종자형 잔디를 개발하기 위해 확보하고 있는 잔디 유전자원에서 꽃대 형성률을 확인할 필요성이 생겼으며, 이 실험에서 549개 라인을 확인해 본 결과, 43개 라인, 즉 7.83%의 라인에서만 꽃대가 출현한 것으로 확인할 수 있었다. 상관분석을 실시 해 본 결과, 이식 후 생존률과 포복경 생성률은 유의하게 양의 상관관계(Rho = 0.44)를 보였고, 이러한 경향은 20% 이상 꽃대를 형성한 것으로 나타난 라인에서 상관관계가 더 높은 경향(Rho = 0.55)을 보였다. 하지만 이식 후 생존률과 포복경 생성률은 꽃대 출현과 상관관계가 매우 낮은 것으로 확인할 수 있었고(Rho = -0.11 and Rho = -0.06), 20% 이상의 꽃대 출현을 보인 43개 라인에서는 유의한 결과를 얻지 못하였다. 따라서 종자형 잔디 개발을 위해서는 이식 후 꽃대 출현률이 저조한 것을 감안, 더욱 많은 유전자원을 확보하는 것이 필요하며, 꽃대 출현이 늦게 나타나는 것을 고려하여 이것과 상관관계가 초기 확인 가능한 특질을 찾아, 꽃대 출현을 조기에 예측할 수 있는 기법이 요구된다. This study was conducted to provide primary data through analysis of zoysia grass genetic resources to develop grass cultivars with beneficial novel properties. Zoysia grass (Zoysia. spp) is native to Korea, and is mainly propagated through stolons. However, since seed coat treatment technology was developed, the breeding of sexually reproductive grass variants has become possible, necessitating characterization of the floret appearance rate in the secured zoysia grass genetic resource before developing sexually reproductive cultivars. In this experiment, 549 grass lines were examined, revealing that florets appear in only 43 lines (7.81%). Survival rates after transplantation, and stolon generation rates displayed a significant positive correlation (Rho = 0.44). Survival rates after transfer, and rates of stolon production displayed very low correlations with floret appearance (Rho = -0.11 and Rho = -0.06). No significant results were obtained in 43 lines that displayed >20% floret appearance. To breed sexually reproductive grass variants, it is thus necessary to secure more genetic resources, considering the low rate of floret appearance. Finding traits that predict floret appearance at an early stage is also required.

Poly(p-dioxanone)(PPDO)의 물리적 특성과 모노필라멘트 봉합사의 In vitro 가수분해 특성

이준희,고석연,고영주,신재섭,정용석,권수한,Lee, June-Hee,Ko, Suk-Yen,Koh, Young-Joo,Shin, Jae-Sup,Chung, Yong-Seog,Kwon, Soo-Han 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.4

The bulk polymerization and thermal properties of biodegradable poly(1,4-dioxan-2-one)[poly(p-dioxanone), PPDO] were investigated. The in vitro hydrolytic degradation behavior of PPDO monofilament sutures were also examined over a 16 week period at $37^{\circ}C$ and $45^{\circ}C$. The degree of PPDO polymerization decreased with increasing content of the initiator, lauryl alcohol[$CH_3(CH_2)_{11}OH$]. The thermal stability of PPDO was inversely proportional to the content of the catalyst, Sn(II) ethylhexanoate[$Sn(Oct)_2$]. Considering the efficiency of polymerization and the thermal stability of PPDO, the proper contents of Lauryl alcohol as an initiator and ethylhexanoate as a catalyst were 1600~1900 ppm and 20~30 ppm, respectively. Based on the determination of the half crystallization time, the crystallization speeds of dyed PPDO chip and monofilament suture were higher than those of undyed PPDO chip and monofilament suture. The maximum rates of crystallization of the dyed and undyed samples were observed at around $40{\sim}50^{\circ}C$ and $50{\sim}60^{\circ}C$, respectively. At the beginning of the in vitro time, the tensile strength of the PPDO monofilament suture decreased slowly but decreased considerably after a certain period, indicating that the degradation proceeded in two steps, the first occurring in the amorphous regions and the second in the crystalline regions. The average molecular weight of the PPDO monofilament suture decreased continuously from the beginning of the in vitro time, due to the random nature of the degradation process. The breaking strength retention (BSR) and molecular weight of the PPDO monofilament suture showed a quadratic function relationship.

재배환경과 유전형의 상호작용에 따른 토마토 과실 품질 변화

박민우(Minwoo Park),정용석(Yong Suk Chung),이상협(Sanghyeob Lee) 한국원예학회 2017 원예과학기술지 Vol.35 No.3

토마토(Solanum spp.)는 라이코펜, 플라보노이드, 글루타민산, β-카로틴 등의 풍부한 항산화 물질을 많이 함유하고 있어 건강채소로서 많은 주목을 받고 있다. 또한 토마토는 세계적인 작물로서 재배법 개선과 품종개량 등에서 많은 연구가 이루어 졌으나 국내에서는 수확량에 중점을 둔 재배를 하고 있다. 따라서 우수한 형질의 특성을 가지고 있는 품종이라도 재배지역과 방법에 따라 그 특성이 제대로 나타나지 않는 경우가 많다. 이에 10점의 품종을 이용하여 품종과 환경에 따른 라이코펜의 함량을 조사하였다. 10점의 공시재료들은 2007년부터 2014년도에 이르기 까지 농업회사 법인 현대종묘(주)에서 육성한 토마토 계통 8점과 대조품종으로 Syngenta(Basel, Switzerland)의 Defnis와 University of Florida (Gainsville, FL, USA)에서 개발한 Tasti-Lee를 사용하였다. 라이코펜 함량은 여주지역의 봄에서 여름에 걸친 하우스 재배에서 HTL3137이 70.48 ㎎·㎏<SUP>-1</SUP>으로 가장 높았으며 수원지역의 봄에서 여름에 걸친 노지재배에서 HTL10256이 20.9 ㎎·㎏<SUP>-1</SUP>으로 가장 낮게 나타났다. 색 구성요소와 라이코펜 함량의 상관관계는 재배 지역별과 유전형에 차이를 보였는데 수원 지역 봄에서 여름 기간의 노지재배에서는 뚜렷한 상관관계를 찾기 힘들었으나, 여주지역의 봄에서 여름기간에 걸친 재배에서는 B의 요인이 라이코펜 함량 상관관계를 보였으며 가을에서 겨울에 걸친 재배 작형에서는 G, Luminosity, L<SUP>*</SUP>, Hue의 요소가 토마토 과실의 라이코펜 함량에 영향을 주는 것으로 나타났다. MINQUE를 이용한 유전형, 재배환경 그리고 유전형×재배환경(genotype×environment, G×E) 상호작용을 분석한 결과 라이코펜 함량을 좌우하는 변수는 유전형이 51.33%로 가장 많은 영향을 미쳤으며 환경변수가 49.13% 그리고 G×E가 21.43%로 산출되었으나 AMMI을 이용한 분석에서는 G×E가 차지하는 요인이 가장 높았으며 유전형과 환경조건이 각각 그 뒤를 따랐다. Bred and grown around the world, tomato (Solanum spp.) has highly valuable fruits containings various anti-oxidants such as lycopene, flavonoids, glutamine, and β-carotene. Several studies have explored, way in which to enhance the growth, management and quality of tomato, we focus on the management of growth for yield rather than quality. The expression of superior agronomic traits depends on where cultivars are grown. We evaluated 10 cultivars grown in three environment for their lycopene. HTL3137 (70.48 ㎎·㎏<SUP>-1</SUP>), which was grown in Yoeju in spring/summer, contained the highest lycopene content, while HTL10256 (20.9 ㎎·㎏<SUP>-1</SUP>), which was grown in Suwon in spring/summer, contain the least lycopene.Correlations between color components and lycopene content varied according to growing location and season. In spring/summer-grown tomatoes from Suwon, no significant correlation was observed between any color component (redness [R], greenness [G], blueness [B], luminosity, L<SUP>*</SUP>, a<SUP>*</SUP>, b<SUP>*</SUP>, hue and chroma) and lycopene content. A correlation was observed between B and lycopene content in tomatoes grown in Yeoju during the same season. In tomatoes grown in Yeoju in fall/winter, significant correlations were found between lycopene content and G, luminosity, L<SUP>*</SUP>, and hue. Variance in interactions between genotype, environment, and genotype × environment (G × E) using Minimum Norm Quadratic Unbiased Estimate (MINQUE) analysis indicated that lycopene content depends on genotype (51.33%), environment (49.13%), and G × E (21.43%). However, when the Additive Main Effects and Multiplicative Interaction (AMMI) was used, the G × E value was highest.

위성이미지 기반 시설하우스 판별 Mask-RCNN 모델 개발

김윤석 ( Yun Seok Kim ),허성 ( Seong Heo ),윤성욱 ( Seong Uk Yoon ),안진현 ( Jinhyun Ahn ),최인찬 ( Inchan Choi ),장성율 ( Sungyul Chang ),이승재 ( Seung-jae Lee ),정용석 ( Yong Suk Chung ) 한국농림기상학회 2021 한국농림기상학회지 Vol.23 No.3

본 인스턴스 분할 모델은 위성을 이용해 촬영된 원격탐지 영상 내의 객체 탐지에 높은 정확도를 갖는다는 것을 입증하였으며, 불법으로 가설된 시설 하우스를 발견하는데 활용될 수 있다. 즉, 특정 지역 및 일정시기를 기준으로 시설하우스를 인식시키고 그 이후에 신축된 하우스를 분별하는데 사용할 수 있을 것이다. 또한 본 기술을 응용하여, 토지피복도 조사와 같은 인력중심의 작업을 빠르게 해결할 수 있다. 앞으로 이 모델은 지리정보시스템(Geographic Information System)과 연계하여 중앙정부 차원의 단일화된 관리체계를 수립할 수 있을 것이며 또한 시설하우스 면적 통계 수치 계산에도 쉽게 응용될 수 있을 것으로 판단된다. The number of smart farms has increased to save labor in agricultural production as the subsidy become available from central and local governments. The number of illegal greenhouses has also increased, which causes serious issues for the local governments. In the present study, we developed Mask-RCNN model to detect greenhouses based on satellite images. Greenhouses in the satellite images were labeled for training and validation of the model. The Mask-RCNN model had the average precision (AP) of 7 5.6%. The average precision values for 50% and 75% of overlapping area were 91.1% and 81.8%, respectively. This results indicated that the Mask-RCNN model would be useful to detect the greenhouses recently built without proper permission using a periodical screening procedure based on satellite images. Furthermore, the model can be connected with GIS to establish unified management system for greenhouses. It can also be applied to the statistical analysis of the number and total area of greenhouses.

장애유아의 언어중재 훈련에 대한 소고 : Think Aloud 훈련을 중심으로

여광응,정용석 大邱大學校 障碍人綜合硏究所 1997 特殊敎育硏究 Vol.20 No.-

본 연구는 언어중재 훈련을 통한 장애유아의 인지 및 문제행동의 개선에 적용가능성을 탐색한 언어로서, 언어중재 훈련으로 Think Aloud(Camp & Bash, 1981) 훈련을 선정하였다. Think Aloud(Camp & Bash, 1981) 훈련은 6~8세 아동을 위해 개발된 프로그램으로서 유아를 대상으로 했을 대는 여러 가지 문제점이 나타날 수 있다. 본 고에서는 유아를 대상으로 할 때의 적용가능성을 탐색하고자 하는 목적으로 언어중재 훈련으로서의 Think Aloud 훈련을 탐색하고, 이 훈련의 주요 구성 요소인 자기교시 훈련과 문제해결 훈련을 살피며, 장애유아를 대상으로 적용할 때의 고려사항을 탐색하고자 한다. The study is aimed at exploring the possibility of verbal mediation training on young children with disabilities. As verbal mediation training, Think Aloud(Camp & Bash, 1981) training is selected, which is mainly devised for children with ages of 6-8. So, if we apply it to more younger children, 1t appears that there are some considerations. In detail, the purpose of this study is to explore 1) think aloud as verbal mediation, 2) self instruction training, 3) problem solving training, and 4) considerations to the application of Think Aloud to young children with disabilities The conclusions as this study reveals that it seems that verbal mediation training, think aloud training has positive effects on young children with disabilities. But, for expecting positive results to young children, it appears that we must consider as follows. First, it is necessary to consider zone of developmental possibilities, therefore pilot test of session, length of intervention, times of rehearsal related to application of think aloud to young children. Second, it seems that we more focus on play based activities Third, it is recommended to use overt verbal intervention.