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Park Eunyoung,Kim Suwhan,Cho Seunghyeon,Kim Hyeonjun,Jung Inho,Moon Jai-Dong,Park Won-Ju 대한의학회 2023 Journal of Korean medical science Vol.38 No.26
Background: Lead exposure is a known risk factor for cardiovascular disease (CVD), and coronary artery calcification (CAC) is a biomarker for diagnosing atherosclerotic CVD. This study investigated the association between blood lead level (BLL) and CAC using coronary computed tomography (CT) angiography. Methods: This study enrolled 2,189 participants from the general population with no history or symptoms of CVD. All participants underwent coronary CT angiography, health examination, and BLL testing. The association between coronary artery calcium score (CACS) and BLL was analyzed. Results: The arithmetic mean of BLL was 2.71 ± 1.26 μg/dL, and the geometric mean was 2.42 (1.64) μg/dL, ranging from 0.12 to 10.14 μg/dL. There was a statistically significant positive correlation between CACS and BLL (r = 0.073, P < 0.001). Mean BLLs among predefined CACS categories were as follows: absent grade (CACS = 0), 2.67 ± 1.23 μg/dL; minimal grade (> 0, < 10), 2.81 ± 1.25 μg/dL; mild grade (≥ 10, < 100), 2.74 ± 1.29 μg/dL; moderate grade (≥ 100, < 400), 2.88 ± 1.38 μg/dL; severe grade (≥ 400): 3.22 ± 1.68 μg/dL. The odds ratio for severe CAC was 1.242 in association with an 1 μg/dL increase in BLL (P = 0.042). Conclusion: Using coronary CT angiography, we determined a positive correlation between BLL and CAC among participants without CVD from the general population. To reduce the burden of CVD, efforts and policies should be geared toward minimizing environmental lead exposure.
Experimental Throughfall Exclusion Studies on Forest Ecosystems: A Review
Park, Seunghyeon,Kim, Ikhyun,Kim, Beomjeong,Choi, Byoungkoo Institute of Forest Science 2019 Journal of Forest Science Vol.35 No.4
Climate change has been intensifying and affecting forest ecosystems. Over the years, the intensity and frequency of climate change have increased and the effects of climate change have been aggravating due to cumulative greenhouse gases such as CO<sub>2</sub>, which has resulted in several negative consequences, drought being the main threat among all. Drought affects forest ecosystems directly and indirectly. Insufficient soil moisture, due to drought, may affect the growth of plants and soil respiration (SR), and soil temperature may increase because of desiccated soil. In addition, the mortality rate of plants and soil microorganisms increases. As a result, these effects could reduce forest productivity. Thus, in this article, we have presented various research studies on artificial drought using throughfall exclusion, and we have mainly focused on SR, which is significantly related to forest productivity. The research studies done worldwide were sorted as per the main groups of Köppen-Geiger climate classification and intensively reviewed, especially in tropical climates and temperate climates. We briefly reviewed the properties among the exclusion experiments about the temperate climate, which mostly includes Korean forests. Our review is not a proof of concept, but an assumption for adequate investigation of drought effects in the Korean forest.
Experimental Throughfall Exclusion Studies on Forest Ecosystems : A Review
Seunghyeon Park,Ikhyun Kim,Beomjeong Kim,Byoungkoo Choi 강원대학교 산림과학연구소 2019 Journal of Forest Science Vol.35 No.4
Climate change has been intensifying and affecting forest ecosystems. Over the years, the intensity and frequency of climate change have increased and the effects of climate change have been aggravating due to cumulative greenhouse gases such as CO2, which has resulted in several negative consequences, drought being the main threat among all. Drought affects forest ecosystems directly and indirectly. Insufficient soil moisture, due to drought, may affect the growth of plants and soil respiration (SR), and soil temperature may increase because of desiccated soil. In addition, the mortality rate of plants and soil microorganisms increases. As a result, these effects could reduce forest productivity. Thus, in this article, we have presented various research studies on artificial drought using throughfall exclusion, and we have mainly focused on SR, which is significantly related to forest productivity. The research studies done worldwide were sorted as per the main groups of Köppen-Geiger climate classification and intensively reviewed, especially in tropical climates and temperate climates. We briefly reviewed the properties among the exclusion experiments about the temperate climate, which mostly includes Korean forests. Our review is not a proof of concept, but an assumption for adequate investigation of drought effects in the Korean forest.
Docker/Container 기반 Plunger Lift 제어 로직 컨테이너화 기술 개발
박승현(Seunghyeon Park),권기웅(Kiwoong Kwon),김용호(Kim Yong Ho),심재윤(Jae-Yoon Shim),이성우(Seoung-Woo Lee),이준경(June-Kyoung Lee) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.11
본 논문에서 운영체제의 확장성 보장뿐만 아니라 다양한 S/W 에 개방형 플랫폼 제공이 가능하도록 Docker/Container 기반의 개방형 아키텍처 플랫폼 구조를 설계하고 개발했다. 이러한 컨테이너화 기술은 다양한 운영체제 환경에서 개발 어플리케이션 동작이 가능해 배포 및 이식성이 우수하고, 개발 환경에 대해 독립적이므로 향후 개발 및 관리에 우수한 장점이 있어, 다양한 산업에서 활용이 가능하다.
Determination of Sugar Contents in Korean Key Foods by HPLC-RI Method
Myeongbin Park,Samuel Park,Seunghyeon Kim,Taewan Kim,Jeehye Sung 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
Sugar supplies a steady source of energy for our body. However, excess consumption of sugars may increase the risk of obesity and chronic disease. The estimation of dietary sugar intake from food consumption requires reliable database(DB) on commercial foods. In this study, we investigated sugar contents of 65 Korean key foods(noodles and pastas, soups, rices, stir-fried foods, side dishes and prepared foods). The sugars including fructose, glucose, sucrose, lactose and maltose were quantified by HPLC-RI method. The analytical method was verified by the validation prameters including linearity, accuracy, precision, and quality control. The results indicated that deodokmuchim(18.71±0.29 g/100 g) had the highest sugar content, followed by janmyeolchibokkeum(14.89±0.52 g/100 g), garlic scapes pickles(15.88±0.39 g/100 g), beef pad thai(9.13±0.23 g/100 g) and seaweed with vinegar dressing(8.29±0.04 g/100 g). Seasoned vegetable side dishes had higher concentrations of sucrose and maltose than other foods, which might be derived from added sugars and seasoning. The present study provides reliable data for Korean food composition DB.
Twenty-year incidence trend of hematologic malignancies in the Republic of Korea: 1999‒2018
Won-Ju Park,Joo-Heon Park,Seunghyeon Cho,Myung Geun Shin 대한혈액학회 2021 Blood Research Vol.56 No.4
Background In this study, we presented the national cancer statistics on the incidence of hematologic malignancies in the Republic of Korea (ROK) over a period of 20 years, from 1999 to 2018. Methods We obtained data on the incidence of hematologic malignancies using the Korean Statistical Information Service (KOSIS). For each hematologic malignancy, the number of cases, crude incidence rate, and age-standardized incidence rate were calculated, and the statistical trends were confirmed by Poisson regression and Joinpoint regression analysis. Results All the investigated hematologic malignancies showed a statistically significant increase in incidence over 20 years. The 20-year trend of the age-standardized incidence rate was as follows: non-Hodgkin lymphoma [average annual percent change (AAPC)=2.26%, P -trend <0.05], leukemia (AAPC=0.94%, P -trend <0.05), myeloid leukemia (AAPC=1.44%, P -trend <0.05), multiple myeloma (AAPC=3.05%, P -trend <0.05), myeloproliferative disorders (AAPC=9.87%, P -trend <0.05), myelodysplastic syndrome (AAPC=7.59%, P -trend <0.05), malignant immunoproliferative diseases (AAPC=11.82%, P -trend <0.05), lymphoid leukemia (AAPC=2.21%, P -trend <0.05), and Hodgkin lymphoma (AAPC=4.04%, P <0.05). Conclusion It was confirmed that the incidence of hematologic malignancies has increased significantly in the ROK over the past 20 years. This study can be used as foundational data source for future studies. In addition, it can aid in the necessary actions of predicting future incidences and establishing future healthcare policies.