http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Ingestion Dose Evaluation of Korean Based on Dynamic Model in a Severe Accident
Kwon, Dahye,Hwang, Won-Tae,Jae, Moosung The Korean Association for Radiation Protection 2018 방사선방어학회지 Vol.43 No.2
Background: In terms of the Level 3 probabilistic safety assessment (Level 3 PSA), ingestion of food that had been exposed to radioactive materials is important to assess the intermediate- and long-term radiological dose. Because the ingestion dose is considerably dependent upon the agricultural and dietary characteristics of each country, the reliability of the assessment results may become diminished if the characteristics of a foreign country are considered. Thus, this study intends to evaluate and analyze the ingestion dose of Korean during a severe accident by completely considering the available agricultural and dietary characteristics in Korea. Materials and Methods: This study uses COMIDA2, which is a program based on dynamic food chain model. It sets the parameters that are appropriate to Korean characteristics so that we can evaluate the inherent ingestion dose of Korean. The results were analyzed by considering the accident date and food category with regard to the $^{137}Cs$. Results and Discussion: The dose and contribution of the food category depicted distinctive differences based on the accident date. Particularly, the ingestion dose during the first and second years depicted a considerable difference by the accident date. However, after the third year, the effect of foliar absorption was negligible and exhibited a similar tendency along with the order of root uptake rate based on the food category. Conclusion: In this study, the agricultural and dietary characteristics of Korea were analyzed and evaluated the ingestion dose of Korean during a severe accident using COMIDA2. By considering the inherent characteristics of Korean, it can be determined that the results of this study will significantly contribute to the reliability of the Level 3 PSA.
Kwon, Dahye,Yang, Inchan,Sim, Yujin,Ha, Jeong-Myeong,Jung, Ji Chul Elsevier 2019 CATALYSIS COMMUNICATIONS - Vol.128 No.-
<P><B>Abstract</B></P> <P>In this study, the significant activity and noticeable C<SUB>2</SUB>-selectivity of a La<SUB>2</SUB>Li<SUB>0.5</SUB>Al<SUB>0.5</SUB>O<SUB>4</SUB> catalyst with a K<SUB>2</SUB>NiF<SUB>4</SUB>-type structure in the oxidative coupling of methane (OCM) was reported for the first time. The high C<SUB>2</SUB>-selectivity of the La<SUB>2</SUB>Li<SUB>0.5</SUB>Al<SUB>0.5</SUB>O<SUB>4</SUB> catalyst originated from its abundance of electrophilic lattice oxygen species, which facilitated the selective formation of C<SUB>2</SUB>-hydrocarbons from methane. Although the activity of the La<SUB>2</SUB>Li<SUB>0.5</SUB>Al<SUB>0.5</SUB>O<SUB>4</SUB> catalyst changed slightly owing to its gradual structural change into LaAlO<SUB>3</SUB> perovskite during OCM, it is highly significant that this catalyst, with a K<SUB>2</SUB>NiF<SUB>4</SUB>-type structure, appears as a potentially promising catalyst for the OCM reaction.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A La<SUB>2</SUB>Li<SUB>0.5</SUB>Al<SUB>0.5</SUB>O<SUB>4</SUB> catalyst with a K<SUB>2</SUB>NiF<SUB>4</SUB>-type structure was prepared. </LI> <LI> A La<SUB>2</SUB>Li<SUB>0.5</SUB>Al<SUB>0.5</SUB>O<SUB>4</SUB> shows significant activities in the oxidative coupling of methane. </LI> <LI> A La<SUB>2</SUB>Li<SUB>0.5</SUB>Al<SUB>0.5</SUB>O<SUB>4</SUB> has abundant electrophilic lattice oxygen species. </LI> <LI> Electrophilic oxygen species are responsible for the formation of C<SUB>2</SUB>-hydrocarbons. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Dahye Shim,Tae Woon Jung,In Kyung Lee,Gumran Park,Yun Jae Park,Jeong Yi Kwon,Yun-Hee Kim6 한국동물매개심리치료학회 2022 한국동물매개심리치료학회지 Vol.11 No.2
This study investigated changes in psychological stress levels of 60 firefighters after participation in an eight-week Equine-Assisted Learning (EAL) program consisting of 16 sessions. The Korean versions of the Posttraumatic Diagnosis Scale (PDS-K), the Center for Epidemiological Studies Depression Scale (K-CESD), and the Difficulties in Emotional Regulation Scale (K-DERS) were used for measurements. Participants were divided into two groups according to level of posttraumatic stress symptoms (PTSS): the PTSS risk group and the PTSS non-risk group. Results showed that PDS-K, K-CESD, and K-DERS scores were significantly reduced after the program in the PTSS risk group. Significant reduction was also found in all sub-scales of PDS-K: re-experiencing, avoidance/emotional numbing, and hyperarousal. Moreover, in the PTSS risk group, there were greater improvements with significant group x time interactions. These findings suggest that EAL is effective in relieving PTSD and PTSD-related symptoms of firefighters with subsyndromal or more severe levels of PTSD.
Kwon, Soonhyung,Kang, Dahye,Hong, Sungwoo WILEY‐VCH Verlag 2015 EUROPEAN JOURNAL OF ORGANIC CHEMISTRY Vol.2015 No.17
<P>An efficient catalytic system for the C-2 selective C-H functionalization of 4-quinolones was developed by using a decarbonylative coupling strategy. The installation of an N-pyrimidyl group on the quinolone nitrogen atom redirected the coordination between the catalyst and the carbonyl group to promote direct C-H functionalization at the 2-position of 4-quinolones. In addition, the present protocol was successfully applied to the C-3 selective installation of a variety of aryl and vinyl groups on an isoquinolone scaffold.</P>
( Dahye Moon ),( Woojin Kim ),( Sungok Kwon ),( Sungyoung Kim ) 대한결핵 및 호흡기학회 2019 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.127 No.-
Background: Studies have reported the associations between long-term exposure to ambient air pollution and lung cancer. However, there have been inconsistent reports of associations for lung cancer by histological type. We aimed to assess the association between long-term exposure to particulate matter less than or equal to 10 μm in a diameter (PM10) and nitrogen dioxide (NO2) and lung cancer incidence by histological subtype in South Korea. Methods: This population- based longitudinal study included 6,567,909 cancer-free subjects from the Korean National Health Insurance Service (NHIS) database for 2006-2007. We linked population data to National Cancer Center cancer registry data to confirm lung cancer incidence for 2006-2013. Individual exposure to PM10 and NO2 were assessed as 5-year average concentrations predicted at subjects’ district-specific home addresses for 2002-2007. We divided these exposures into two categories based on the 75th percentile. Cox proportional hazards models were used to estimate hazard ratios (HRs) of lung cancer incidence for the upper 25% exposure compared to the low 75% by histological subtypes at diagnosis, adjusting for potential confounders. (Figure 1) Results: Incident lung cancer was higher in male (n=21,912) than female (n=5,606). The incidence of lung cancer was higher in males, smokers, frequent exercisers or drinkers, and subjects with chronic obstructive pulmonary disease. Overall, we did not find increased risk of lung cancer with higher exposure of PM10 or NO2. However, a marginal association (P<0.10) was found for non-small cell carcinoma (HR=1.05, 95% CI=0.99-1.11). Specifically, high exposure to PM10 was associated with increased risk of adenocarcinoma in comparison with lower exposure in male smokers (HR=1.14, 95% CI=1.03- 1.25). (Table1) Conclusion: This study showed that long-term air pollution exposures were associated with elevated risk of lung adenocarcinoma in male smokers in Korea.
신다혜 ( Dahye Shin ),홍은채 ( Eunchae Hong ),권기진 ( Kijin Kwon ),최기환 ( Kihwan Choi ),장영훈 ( Younghoon Jang ),이경용 ( Kyungyong Lee ) 한국정보처리학회 2023 한국정보처리학회 학술대회논문집 Vol.30 No.2
배달량 확산과 자율 주행 로봇의 실내외 주행이 가능해지면서 로봇을 활용할 주문 및 배달 서비스가 활발해지고 있다. 따라서 기존의 자율 주행 배달 로봇의 문제점을 개선하여 보다 나은 배달 서비스를 제공하고자 자율 주행 배달 로봇을 연구하였다. 배달 로봇에 AI를 적용하여 장애물 탐지, 최적코스 탐색을 통해 목적지까지 최적 경로로 이동하며, 배달 물품 안전까지 보장한다.
권혁준 ( Kwon Hyeokjoon ),홍다혜 ( Hong Dahye ),변상돈 ( Byeon Sangdon ),임경재 ( Lim Kyoungjae ),김종건 ( Kim Jonggun ),남창동 ( Nam Changdong ),홍은미 ( Hong Eunmi ) 한국농공학회 2021 한국농공학회논문집 Vol.63 No.3
The Doam Lake Watershed is one of Gangwon-do’s non-point source management areas. This area has a lot of snowfall in winter, and it is expected that there will be a lot of soil erosion in early spring due to snow melting. In this study, snow melting was monitored in the Doam Lake watershed from February to 3, 2020. It was conducted to analyze the water quality changes by calculating the concentration of non-point source pollution caused by snowmelt, and to compare the concentration of water quality during snowmelt event with rainfall and non-rainfall event. As a result of water quality analysis, Event Mean Concentration (EMC) at the first monitoring was SS 33.9 mg/L, TP 0.13 mg/L, TN 4.33 mg/L, BOD 1.35 mg/L, TOC 1.84 mg/L. At the second monitoring, EMC were SS 81.3 mg/L, TP 0.15 mg/L, TN 3.12 mg/L, BOD 1.32 mg/L, TOC 3.46 mg/L. In parameter except SS, it showed good water quality. It is necessary to establish management measures through continuous monitoring.
3D CAD 모델 기반 조립성 및 조립비용 분석설계 지원시스템에 관한 연구
황다혜(Dahye Hwang),양진호(Jinho Yang),권혁진(Hyeokjin Kwon),김보현(Bohyun Kim),노상도(Sangdo Noh) (사)한국CDE학회 2018 한국CDE학회 논문집 Vol.23 No.4
Mass production was the main stream in manufacture industry for decades, however, small quantity batch production is becoming important as IT technology and data management system developed. In this industrial situation, manufactures are under pressure of shortening new product development time to meet custormer needs. DFMA provides guidance to the designer for simplifying the product structure to reduce manufacturing and assembly costs. Most of existing DFMA tools are implementing checklist method based on surveys on user experiences and assessing design under guidelines. This research suggests design-support system which is associated with 3D CAD systems to analyze assemblability and manufacture cost easily. Design-support system helps designer’s decision making using 3D CAD models and data to show product assembly structure and BOM.