만경강 유역 지점별 수질을 고려한 농업용수 양분분포 지도 작성

이경도 ( Kyungdo Lee ),홍석영 ( Sukyoung Hong ),김이현 ( Yihyun Kim ),이덕배 ( Deogbae Lee ),고명석 ( Myungsuk Ko ),이경보 ( Kyeongbo Lee ) 한국농공학회 2012 한국농공학회 학술대회초록집 Vol.2012 No.-

새만금 유역 농경지 면적 비율은 37%로 전국 농경지 면적 비율 22%에 비해 1.7배 정도 높은 값을 보이고 있어 농경지에서 배출되는 질소와 인 등의 영양물질이 하천과 호소로 유입되는 것에 관심을 기울일 필요가 있다. 특히, 새로 조성되고 있는 새만금 담수호 인근으로 넓은 농경지가 분포하고 있어 농경지에서 유출되는 양분이 담수호에 직접 유입될 가능성이 높다. 따라서 작물 생육에 필요한 적정 양분을 공급하면서도 잉여양분이 유출되는 것을 억제할 수 있는 영농관리 노력이 필요하다. 이를 위해 만경강 유역의 농업용수 중 영양물질을 시기별, 지점별로 분석하고 공간 분포를 제시하여 합리적인 시비관리의 참고자료로 활용하기 위해 본 연구를 수행하였다. 영농기 만경강 상류 어우보에서 2만3천ha 농경지에 공급되는 관개용수의 용수로 지점별 수질 자료와 660ha의 만경강 하천부지에 관개용수로 활용되는 만경강 하천 지점별 수질 분석 자료를 활용하여 ArcGIS 10에서 전자지도의 하천 및 수로 구간별 shape 파일을 생성하고 속성 값을 입력하여 농업용수의 양분공급능을 공간적 분포로 제시하였다. 또한, 벼에 대해서는 하천 및 수로 구간별 몽리면적을 대상으로 양분공급능을 고려한 시비량을 산정하여 유역의 양분부하 저감 효과를 평가하였다.

Analysis of Quality of Life and Mental Health in Patients With Atopic Dermatitis, Asthma and Allergic Rhinitis Using a Nation-wide Database, KNHANES VII

Lee Gyu Na,Koo Ha Yeh Rin,Han Kyungdo,Lee Young Bok 대한천식알레르기학회 2022 Allergy, Asthma & Immunology Research Vol.14 No.2

Purpose: This study investigated mental health status and quality of life in allergic disease patients compared with non-allergic controls. Methods: This study used nationwide, population-based, cross-sectional data from the Korean National Health and Nutrition Examination Survey from 2016 to 2018. The propensity matching score was used to balance age and sex distributions between the allergic disease groups and corresponding controls. Atopic dermatitis (n = 446) and asthma (n = 483) groups were compared with controls in a 1:10 ratio, and the allergic rhinitis (n = 2,357) group was compared with controls in a 1:2 ratio. Multiple logistic regression analyses were used to evaluate the odds ratios (ORs) for mental health status and health-related quality of life (HRQoL) based on the presence of allergic diseases. Results: The ORs for severe psychological stress, psychological consultation and diagnosis of depression were more significantly increased in the asthma (OR, 1.41, 1.83, and 2.1, respectively) and allergic rhinitis groups (OR, 1.35, 1.48, and 1.83, respectively) compared with non-allergic controls after adjustment for confounding factors. The rate of severe problems in mobility was more significantly increased in the asthma group compared to controls. Conclusions: The results show that efforts should be made to manage psychological problems and improve HRQoL in patients with atopic dermatitis, asthma and allergic rhinitis.

Estimation of Winter Wheat Nitrogen Content, Biomass and Yield using UAV Images in South Korea

KyungDo Lee,Ho-yong An,Suk-young Hong,Chan-Won Park,Kyu-Ho So,Sang-In Shim,Gi-Eun Song,Sang-Il Na 한국토양비료학회 2020 한국토양비료학회지 Vol.53 No.4

Unmanned Aerial Vehicle (UAV)s have a high resolution of around 10 cm, and can acquire images with lower cost when we want. The purpose of this study was to estimate the winter wheat nitrogen content, biomass and grain yield using UAV image. We collected the time series UAV aerial images at the upland and the data were compared with the wheat nitrogen contents, biomass and yield in the experimental sites. Correlation coefficient (R) between the vegetation indices (NDVI, GNDVI, RVI, GRVI, NDRE) and wheat nitrogen contents were more than 0.8 from early-April to late-April. Correlation coefficient (R) between the vegetation indices (NDVI, GNDVI, RVI, GRVI, NDRE) and wheat biomass, grain yield, and crude protein were from 0.7 to 0.8 from early-April to late-April. Using these results, we were able to make the distribution map of the wheat nitrogen, biomass and yield. In the future, it will be necessary to study to recommend supplemental fertilization to ensure the wheat yield using UAV images information.

Comparison of alternative approaches to single-trait genomic prediction using genotyped and non-genotyped Hanwoo beef cattle

Lee, Joonho,Cheng, Hao,Garrick, Dorian,Golden, Bruce,Dekkers, Jack,Park, Kyungdo,Lee, Deukhwan,Fernando, Rohan BioMed Central 2017 Genetics, selection, evolution Vol.49 No.-

<P><B>Background</B></P><P>Genomic predictions from BayesA and BayesB use training data that include animals with both phenotypes and genotypes. Single-step methodologies allow additional information from non-genotyped relatives to be included in the analysis. The single-step genomic best linear unbiased prediction (SSGBLUP) method uses a relationship matrix computed from marker and pedigree information, in which missing genotypes are imputed implicitly. Single-step Bayesian regression (SSBR) extends SSGBLUP to BayesB-like models using explicitly imputed genotypes for non-genotyped individuals.</P><P><B>Methods</B></P><P>Carcass records included 988 genotyped Hanwoo steers with 35,882 SNPs and 1438 non-genotyped steers that were measured for back-fat thickness (BFT), carcass weight (CWT), eye-muscle area, and marbling score (MAR). Single-trait pedigree-based BLUP, Bayesian methods using only genotyped individuals, SSGBLUP and SSBR methods were compared using cross-validation.</P><P><B>Results</B></P><P>Methods using genomic information always outperformed pedigree-based BLUP when the same phenotypic data were modeled from either genotyped individuals only or both genotyped and non-genotyped individuals. For BFT and MAR, accuracies were higher with single-step methods than with BayesB, BayesC and BayesC<I>π</I>. Gains in accuracy with the single-step methods ranged from +0.06 to +0.09 for BFT and from +0.05 to +0.07 for MAR. For CWT, SSBR always outperformed the corresponding Bayesian methods that used only genotyped individuals. However, although SSGBLUP incorporated information from non-genotyped individuals, prediction accuracies were lower with SSGBLUP than with BayesC (<I>π</I> = 0.9999) and BayesB (<I>π</I> = 0.98) for CWT because, for this particular trait, there was a benefit from the mixture priors of the effects of the single nucleotide polymorphisms.</P><P><B>Conclusions</B></P><P>Single-step methods are the preferred approaches for prediction combining genotyped and non-genotyped animals. Alternative priors allow SSBR to outperform SSGBLUP in some cases.</P>

Actinic keratosis and diabetes complications: A nationwide population-based study in South Korea (2009–2015)

Lee, YoungBok,Lee, JiHyun,Choi, JinYoung,Yu, DongSoo,Han, KyungDo,Park, Yong-Gyu Elsevier 2019 Diabetes & metabolism Vol.45 No.1

<P><B>Abstract</B></P> <P><B>Aim</B></P> <P>As the associations between actinic keratosis (AK) and diabetes complications in patients with diabetes mellitus (DM) have never been investigated, this study aimed to evaluate any such associations in patients with DM.</P> <P><B>Methods</B></P> <P>This retrospective cohort study analyzed clinical data for DM patients aged>40 years who had undergone the health examination recommended by the South Korea National Health Insurance Program between 2009 and 2012 (<I>n</I> =2,056,580). All of these patients were classified according to the presence of diabetic retinopathy (DR), end-stage renal disease (ESRD) and history of DVD; myocardial infarction, stroke, transient ischaemic attacks. Newly diagnosed AK was identified using claims data from baseline to the date of diagnosis or 31 December 2015, whichever came first.</P> <P><B>Results</B></P> <P>Of the 2,056,580 patients with DM, 6404 (0.31%) developed AK. Those patients in the DR, ESRD and CVD groups were more likely to be diagnosed with AK (<I>P</I> <0.001, by log-rank test). After adjusting for age and gender, the risks for AK were significantly higher in the DR, ESRD and CVD groups: HR (95% CI): 1.29 (1.21–1.39), HR: 4.24 (3.28–5.47) and HR: 1.22 (1.13–1.31), respectively.</P> <P><B>Conclusion</B></P> <P>This study has revealed that the incidence of AK is higher in diabetes patients with ocular, renal and cardiovascular complications.</P>

Characteristics of UAV Aerial Images for Monitoring of Highland Kimchi Cabbage

KyungDo Lee,Chan-Won Park,Kyu-Ho So,Ki-Deog Kim,SangIl Na 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.3

Remote sensing can be used to provide information about the monitoring of crop growth condition. Recently Unmanned Aerial Vehicle (UAV) technology offers new opportunities for assessing crop growth condition using UAV imagery. The objective of this study was to assess weather UAV aerial images are suitable for the monitoring of highland Kimchi cabbage. This study was conducted using a fixed-wing UAV (Model : Ebee) with Cannon S110, IXUS/ELPH camera during farming season from 2015 to 2016 in the main production area of highland Kimchi cabbage, Anbandegi, Maebongsan, and Gwinemi. The Normalized Difference Vegetation Index (NDVI) by using UAV images was stable and suitable for monitoring of Kimchi cabbage situation. There were strong relationships between UAV NDVI and the growth parameters (the plant height and leaf width) (R<SUP>2</SUP>≥0.94). The tendency of UAV NDVI according to Kimchi cabbage growth was similar in the same area for two years (2015~2016). It means that if UAV image may be collected several years, UAV images could be used for estimation of the stage of growth and situation of Kimchi cabbage cultivation.

Fracture Risk in Middle-Aged and Older Patients With Inflammatory Bowel Disease: A Korean Nationwide Population-Based Cohort Study

Lee Ji Min,Han Kyungdo,Lee Kang-Moon,Yun Jae-Seung 대한의학회 2023 Journal of Korean medical science Vol.38 No.35

Background: Fracture risks and associated factors are poorly understood in middle-aged and older Asian populations with inflammatory bowel disease (IBD). Therefore, we investigated fracture risk and the effects of comorbidities and lifestyle habits on the risk of developing fractures in middle-aged and older Korean patients with IBD. Methods: We conducted a nationwide population-based cohort study using data from the National Health Insurance Corporation Database. Patients with IBD who underwent the National Screening Program and were over 40 years of age were included in the study. We compared patients with age- and sex-matched controls. The incidence of fractures, including vertebral, hip, and other sites, was determined using claims data. Results: The risk of total fractures and vertebral fractures was significantly higher in the IBD group (adjusted hazard ratio [HR], 1.31, 95% confidence interval [CI], 1.16–1.48; adjusted HR, 1.59, 95% CI, 1.33–1.92, respectively). Obesity, diabetes, hypertension, and lack of exercise were associated with increased fracture risk in patients with ulcerative colitis (UC). In contrast, the risk increases in patients with Crohn’s disease regardless of comorbidities and lifestyle preferences. Conclusion: The risk of bone fracture, especially vertebral fracture, is high in middle-aged and older Korean patients with IBD. Obesity, diabetes, hypertension, and lack of exercise are all risk factors associated with bone fractures in patients with UC. These findings are helpful for clinicians to educate patients with IBD on bone health and raise awareness of bone fractures in patients with UC who have specific risk factors.

Evapotranspiration Estimating in a Rice Field Using Tseb Model with Modified Soil Heat Flux Equation

Kyungdo Lee,Kyunghwa Han,Sukyoung Hong,Kyomoon Shim,Yihyun Kim,Sangil Na 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Assessment of Hyperspectral Reflectance on Rice Leaf Inoculated with Bacterial Leaf Blight for Applicability of UAV Monitoring

KyungDo Lee,Sang-Min Kim,Chan-Won Park,Kyu-Ho So,Ho-yong An,Sang-Il Na 한국토양비료학회 2018 한국토양비료학회지 Vol.51 No.4

Postdischarge long-term cardiovascular outcomes of intensive care unit survivors who developed dialysis-requiring acute kidney injury after cardiac surgery

Lee, Soojin,Park, Sehoon,Kang, Min Woo,Yoo, Hai-Won,Han, Kyungdo,Kim, Yaerim,Lee, Jung Pyo,Joo, Kwon Wook,Lim, Chun Soo,Kim, Yon Su,Kim, Hyeongsu,Kim, Dong Ki Elsevier 2019 Journal of critical care Vol.50 No.-

<P><B>Abstract</B></P> <P><B>Purpose</B></P> <P>Dialysis-requiring acute kidney injury (AKI-D) after cardiac surgery is a major cause of in-hospital mortality. However, the long-term outcome has not been previously examined.</P> <P><B>Materials and methods</B></P> <P>We performed a nationwide, population-based cohort study using the claims data in the Korean National Health Insurance System. Patients who underwent cardiac surgery between 2006 and 2015 were considered.</P> <P><B>Results</B></P> <P>Among 52,983 patients who underwent cardiac surgery, 1261 underwent dialysis postoperatively. During the median follow-up of 3.33 years, the AKI-D group had increased risk of all-cause mortality, end-stage renal disease (ESRD) progression, and risk of developing major adverse cardiovascular events (MACEs). These results remained consistent after multivariable analysis and propensity-score matching. Even after excluding patients who continued dialysis at discharge, the AKI-D group consistently exhibited worse mortality and an increased risk of MACEs compared to the control group. Patients who underwent continuous renal replacement therapy in the AKI-D group exhibited comparable mortality and risk of MACEs but reduced progression to ESRD compared to those who received intermittent renal replacement therapy.</P> <P><B>Conclusions</B></P> <P>AKI-D following cardiac surgery was associated with worse long-term postdischarge mortality and elevated risks of dialysis dependency and MACE development. The outcomes were consistent even in the patients who recovered from the dialysis.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We examined the impact of dialysis-requiring AKI following cardiac surgery. </LI> <LI> AKI-D after cardiac surgery is associated with worse long-term prognosis. </LI> <LI> Postdischarge patients who recovered from AKI-D exhibited poor long-term outcomes. </LI> </UL> </P>