http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
중량식 라이시미터에서 콩 재배시 물관리 방법에 의한 양분의 용탈과 작물 흡수
이예진,한경화,이슬비,성좌경,송요성,이덕배,Lee, Ye-Jin,Han, Kyung-Hwa,Lee, Seul-Bi,Sung, Jwa-Kyung,Song, Yo-Sung,Lee, Deog-Bae 한국환경농학회 2017 한국환경농학회지 Vol.36 No.3
본 연구는 기상 조건 및 관개 여부가 양분용탈 및 콩의 양분 흡수에 영향을 미치는지 평가하기 위하여 중량식 라이시미터에서 2015년부터 2016년까지 콩을 재배한 결과를 제시하였다. 콩 재배기간인 6월부터 10월까지의 증발산량은 무관개구의 경우 강우에 따라 변동되었으며, 2016년 7월 중순부터 8월 말까지 지온상승 및 강우 빈도의 감소로 증발산량이 감소하다가 9월 중순 강우에 의해 유효수분 함량을 회복하여 생육 후기에 증발산량이 증가하였다. 질산태질소의 지하 용탈량은 2016년 7월 초 5일간 강우가 지속되었을 때 가장 많았으며, 그동안 지하배수가 거의 없었던 무관개구에서 더 높게 나타났다. 개화기 및 착협기인 7월 중순부터 8월까지 한발로 인하여 무관개구의 토양 수분함량은 7월 초의 50% 수준으로 유지되었으며, 콩 수량은 적습관개구의 25% 수준이었다. 적습관개구와 무관개구의 양분 흡수량을 비교한 결과 질소 흡수량이 적습관개구에서 20~50% 더 높았으며, 인산, 칼리 흡수량 차이는 미미하였다. 토양 수분함량은 콩의 질소 흡수에 영향을 미치며, 적정 수량을 생산하기 위해서는 관개를 통한 적정 수분 공급이 필수적이었다. BACKGROUND: Soil water content strongly depends on weather condition and irrigation, and it could influence on crop nutrient use efficiency. This study was performed to assess nutrient uptake of soybean by soil water condition. METHODS AND RESULTS: In this study, nutrient leaching and crop uptake as affacted by water management practice was investigated using weighing lysimeter which is located in National institute of agricultural science, Wanju, Jeonbuk province from June 2015 to October 2016. Water supply for soybean (cv. Daewon) was managed with irrigation and rainfall. Nitrate leaching was greatest in the rainfall treatment at early July 2016. Yield of soybean in the rainfall treatment was only 25% compared to the irrigation due to the drought at flowering and podding period. The uptake of nitrogen was considerably reduced by drought whereas the uptake of phosphorus and potassium was less affected by drought. CONCLUSION: It was proven that nitrogen loss and uptake were dependent on soil water condition. Therefore, irrigation water management to maintain available soil moisture capacity is critical to nitrogen uptake and yield of soybean.
이예진,Chung-Jae Lee 대한예방치과학회 2023 International Journal of Clinical Preventive Denti Vol.19 No.1
Objective: To evaluate the marginal and internal fitness of temporary dental resin according to the slice thickness of Digital Light Processing (DLP) 3D printers, considering the rapid spread and use of dental 3D printers. Methods: The temporary dental resin specimens were classified into five groups according to the slice thickness of the DLP 3D printer: 0.01 mm, 0.025 mm, 0.075 mm, 0.1 mm, and 0.15 mm, with ten specimens in each group, amounting to a total of 50 specimens. The scanned data of the silicone impressions obtained from the scanner were evaluated for fitness in the marginal, axial, and cuspal regions using a CAD program. Results: The mean values of the descriptive statistics of the gaps by slice thickness for DLP 3D printers showed the highest gaps in the 0.15 mm group, and relatively low gaps in the 0.01 mm group. When examined by site, the lingual cusp had the highest spacing, while the lingual margin had relatively low spacing. Significant differences were found by slice thickness (p<0.001) and by measurement site (p<0.001). There was a significant combined effect of Slice Thickness and Site (p=0.001). Conclusion: Based on the above results, the temporary dental restorative resins produced by DLP 3D printers show higher fitness with thinner slice thickness and all of them are in the clinically acceptable range (<120 μm), suggesting they can be sufficiently used for making temporary dental restorative resins.
메타버스의 수업활용에 관한 사용자 경험 분석 - 스페이셜(Spatial)을 중심으로 -
이예진,정광태,Lee, Yejin,Jung, Kwang-Tae 한국실천공학교육학회 2022 실천공학교육논문지 Vol.14 No.2
In this study, the user experience was analyzed from the learner's point of view, focusing on the metaverse platform 'Spatial'. SUS(System Usability Scale) was used to evaluate the usability of the metaverse platform 'Spatial' in a college class, and the Magnitude estimation technique was used to evaluate the immersion and satisfaction with the class. In addition, a questionnaire survey was used to collect user experience opinions on the use of 'Spatial' as a teaching tool. Looking at the usability evaluation results of the 'Spatial' system, the students evaluated the usability, immersion, and satisfaction quite positively. Looking at the user experience of metaverse platform 'Spatial', it was found that students highly valued Metaverse as an educational tool that can provide a place for many people to gather and communicate even in a non-face-to-face space. Compared to other online platforms, metaverse has advantages in ease of use, interaction, immersion, and interest. In particular, in addition to keyboard, touch, and display, interaction using the five senses such as voice, motion, and gaze was recognized as a great advantage. On the other hand, it was found that high openness, freedom, and interest factors can both promote learning and inhibit learning. Nevertheless, it is judged that the metaverse platform 'Spatial' can be effectively applied in college classes because it enables various interactions between instructor and learner or between learner and learner.
The effect of metformin on culture conversion in tuberculosis patients with diabetes mellitus
이예진,Sung Koo Han,Ju Hee Park,Jung Kyu Lee,Deog Keom Kim,Hee Soon Chung,Eun Young Heo 대한내과학회 2018 The Korean Journal of Internal Medicine Vol.33 No.5
Background/Aims: Patients with diabetes mellitus (DM) and tuberculosis (TB) have increased morbidity and a high risk of treatment failure or recurrence. It is important to manage both diseases simultaneously. Among anti-diabetic drugs, metformin inhibits intracellular growth of mycobacteria. Therefore, we examined the effects of metformin on TB treatment, especially in patients with DM. Methods: This retrospective cohort study included patients with culture-positive pulmonary TB diagnosed between 2011 and 2012. The primary study outcome was sputum culture conversion after 2 months of treatment. Results: Of 499 patients diagnosed with culture-positive pulmonary TB, 105 (21%) had DM at diagnosis. Among them, 62 (59.5%) were treated with metformin. Baseline characteristics, except for the presence of chronic renal disease, were not significantly different between the metformin and non-metformin groups. Metformin treatment had no significant effect on sputum culture conversion (p = 0.60) and recurrence within 1 year after TB treatment completion (p = 0.39). However, metformin improved the sputum culture conversion rate in patients with cavitary pulmonary TB, who have higher bacterial loads (odds ratio, 10.8; 95% confidence interval, 1.22 to 95.63). Conclusions: Among cavitary pulmonary TB patients with DM, metformin can be an effective adjunctive anti-TB agent to improve sputum culture conversion after 2 months of treatment.
시설 채소 토경 관비재배를 위한 관비 처방 프로그램 개발
이예진 ( Yejin Lee ),이찬욱 ( Chanwook Lee ),이슬비 ( Seulbi Lee ),현병근 ( Bynggeun Hyun ),송요성 ( Yosung Song ),김양민 ( Yangmin X. Kim ),류철현 ( Chulhyun Yoo ) 한국환경농학회 2021 한국환경농학회 학술대회집 Vol.2021 No.-
국내 시설재배지 토경재배 면적은 약 89%이며, 대부분의 농가에서 물과 비료를 같이 공급하는 관수 시설을 보유하고 있다. 시설재배의 특성상 연중 내내 재배를 하고, 작물 재배 중 지속적으로 비료를 공급하기 때문에 시설재배지 토양의 염류집적 문제를 피하기 어려운 상황이다. 주로 농가의 경험에 의존하여 비료성분 함량이 높은 수입산 관주용 비료를 많이 사용하기 때문에 과다한 비료를 사용할 우려가 있고, 경영비 또한 상승할 수 있다. 본 연구에서는 시설 토경 관비재배지에서 작물 생육시기에 따라 필요한 물과 비료량을 설정하고, 1주 단위로 물과 비료를 처방하는 시스템을 개발하였다. 대상작물은 애호박, 수박, 멜론, 가지, 풋고추, 딸기, 단고추, 토마토, 오이, 참외, 배추, 열무, 상추 총 13작물이며, 주산단지 선도농가 관비 사용량 조사 및 농가 실증시험을 통해 관비 표준량을 설정하였다. 작물별 관비 처방량은 흙토람(http://soil.rda.go.kr)에서 제공하고 있으며, 흙토람에서 작물별 재배시기, 기준 수량, 관수 방법, 비료 종류를 선택하면 관비(물+비료) 처방서를 발급할 수 있다. 관비 처방량과 농가의 물, 비료 사용량을 비교 했을 때, 물은 약 33%, 질소 비료는 약 41% 절감 가능한 것으로 나타났으며, 작물 수확 후 질산태질소 함량은 농가 관행에 비해 관비 처방서를 적용했을 때 감소한 것을 확인할 수 있었다. 따라서 관비처방서 활용을 통해 물과 비료의 이용효율을 높이고, 환경 영향도 최소화 할 수 있을 것으로 기대된다.
중량식 라이시미터에서 배추 재배에 따른 질소 용탈과 수지
이예진 ( Ye Jin Lee ),옥정훈 ( Jung Hun Ok ),이슬비 ( Seul Bi Lee ),성좌경 ( Jwa Kyung Sung ),송요성 ( Yo Sung Song ),이덕배 ( Deog Bae Lee ) 한국환경농학회 2018 한국환경농학회지 Vol.37 No.3
중량식 라이시미터를 활용하여 배추 재배 중 식양토와 사양토의 질소 용탈과 질소 수지를 평가하였다. 생육 초기인 9월 초 강우로 인해 식양토와 사양토 모두 토심 150 cm 이하로 배수가 있었다. 식양토는 점토의 수축 및 작물 뿌리 등에 의해 형성된 대공극을 통해 일시적으로 배수량이 증가하였으나, 사양토는 식양토와 달리 강우량에 따라 일정하게 배수량이 증가하고, 감소하였다. 토성별로 질소 용탈량을 분석한 결과, 식양토에서는 비료의 용탈이 거의 없는 반면, 사양토에서는 식양토에 비해 5배 많은 질소 용탈이 있었다. 질소수지에서 작물 흡수량에 비해 질소 용탈량이 차지하는 비율은 적었으나 식양토에 비해 사양토에서의 용탈량이 많아 질소 수지산정에 토성에 따른 용탈특성을 고려할 필요가 있다. BACKGROUND: Nitrogen leaching depends on the drainage pattern and nitrate content, and those are influenced by soil hydraulic properties and fertility. The purpose of this study was to confirm how soil texture contributed to leaching and balance of nitrogen, as well as to drainage. METHODS AND RESULTS: This study was performed using undisturbed weighing lysimeters which were piled up with clay loam (Songjung series) and sandy loam (Sanju series) soils in National Institute of Agricultural Science experimental field. Chinese cabbage was cultivated from August 30 to October 31, 2017. The application rates of N, P<sub>2</sub>O<sub>5</sub>, and K<sub>2</sub>O were 21.5, 7.8, and 15.0 kg 10a <sup>-1</sup> , respectively, and irrigation was supplied at -33 kPa in 30 cm soil depth. Drainage in clay loam was not noticeable, although it was increased by rainfall in early September. By contrast, the trend of drainage in sandy loam was strongly dependent upon rainfall pattern. Owing to different drainage patterns between both soil textures, nitrogen leaching was 5-fold higher in sandy loam than in clay loam. Nitrogen use efficiencies in clay loam and sandy loam were represented as 43% and 52%, respectively. CONCLUSION: The pattern of drainage and nitrogen leaching were greatly depended on clay content in soil. From this study, we carefully suggest that soil texture should be considered as an incidental factor to estimate nitrogen balance.