Maternal Depression and Children's Screen Overuse

Park, Sunghyun,Chang, Hyoung Yoon,Park, Eun-Jin,Yoo, Heejeong,Jo, Woodong,Kim, Sung-Ju,Shin, Yunmi KOREAN ACADEMY OF MEDICAL SCIENCE 2018 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.33 No.34

<P><B>Background</B></P><P>It is known that there are various factors associated with children's screen overuse. The aim of this study was to examine the effect of maternal depression on 2–5-year-old children's overuse of various household screen devices.</P><P><B>Methods</B></P><P>Participants were from the Internet-Cohort for Understanding of internet addiction Risk factors/Rescue in Early livelihood (I-CURE) study, an observational prospective cohort study in Korea. Screen time for six types of screen devices (smartphone, television, computer, tablet, video gaming console, and portable gaming console) were assessed by parental questionnaire. Maternal depression was measured by the Korean version of the Beck Depression Inventory II. Logistic regression models were run to determine the association between maternal depression and children's screen overuse.</P><P><B>Results</B></P><P>Maternal depression was associated with children's television overuse after adjusting for other factors (odds ratio, 1.954; <I>P</I> = 0.034). Contrary to expectation, the relationship between maternal depression and screen time was not present on other devices such as smartphones, computers and tablets.</P><P><B>Conclusion</B></P><P>Maternal depression is related with 2–5-year-old children's television overuse. Interventions in maternal depressive symptoms and the associated changes in parent-child relationship can be useful for preventing children's television overuse.</P>

Monitoring of Microplastics in Disposable Tea Bags

Heejeong Jeong,Insook Lee,Jaemin Shin,Joohyeon Park,Mihyeon Choi,Hyeran Yang,Misun Kim,Jeongsook Lee,Insook Hwang,Jooseong Park 한국분석과학회 2024 학술대회논문집 Vol.2024 No.5

Reference ranges for autonomic function tests in healthy korean adults

Park, Kee Hong,Kim, Byoung Joon,Kang, Sa-Yoon,Oh, Sun-Young,Sohn, Eun Hee,Song, Kyeong-jin,Shin, Jin-Hong,Kang, Kyoung Hwa,Cho, Eun Bin,Jeong, Heejeong,Lee, Hyung,Kim, Hyun Ah,Kim, Rock Bum,Park, Ki-J The Korean Society of Clinical Neurophysiology 2019 Annals of Clinical Neurophysiology Vol.21 No.2

Background: The standardized autonomic function test has become widely available. However, there are no reference data for this test for the Korean population. This study explored reference data for sudomotor and cardiovagal function tests for the Korean population. Methods: The sweat volume by quantitative sudomotor axon reflex test, heart-rate response to deep breathing (HRdb), expiration:inspiration (E:I) ratio, and Valsalva ratio (VR) were measured in 297 healthy Korean volunteers aged from 20 to 69 years. Multivariate regression analysis was performed to evaluate the effects of age, sex, and body mass index on these variables. The 2.5th, 5th, 10th, 90th, 95th, and 97.5th percentile values were obtained for each investigation. Results: The sweat volume was higher in males than in females. The HRdb and E:I ratio were negatively correlated with age, and were higher in males than in females. The VR was negatively correlated with age, but it was not correlated with sex. Conclusions: This study has provided data on the reference ranges for sudomotor and cardiovagal function tests in healthy Korean adults.

무선전력전송을 통한 REAR LAMP 전원 공급 시스템

박희정(Heejeong Park),배진우(Jinwoo Bae),신중권(Jungkwon Shin),김종영(Jongyoung Kim),이가희(Gahee Lee) 한국자동차공학회 2016 한국자동차공학회 학술대회 및 전시회 Vol.2016 No.11

In this paper, 15W wireless power transmission system for REAR LAMP of car using the magnetic resonance is proposed. This system is composed up Power transmitter installed OUT-SIDE LAMP in body of car and Power Receiver installed IN-SIDE LAMP in Trunk of car. The wireless power block consists of Class D Type Amp, 300kHz magnetic resonator of spiral structure and full bridge receiver using diode. Especially, the PTU(Power Transmit Unit) includes voltage and signal input control circuit named “TAIL”, “STOP”, TURN”, “BACK-CUP”, as well as wireless duplex communication for PRU(Power Receiver Unit) output control. We expect the new design of REAR LAMP in car by using this system that electrical segregation of trunk in car.

Association of the Catechol O-Methyltransferase Val158-Met Polymorphism and Reduced Interference Control in Korean Children with Attention-Deficit Hyperactivity Disorder

Subin Park,JongEun Park,HeeJeong Yoo,JaeWon Kim,JaeHoon Cheong,DougHyun Han,Yeni Kim,BungNyun Kim 대한신경정신의학회 2015 PSYCHIATRY INVESTIGATION Vol.12 No.4

Objective-We tested for association of the catechol-O-methyltransferase (COMT) Val158-Met (rs4680) polymorphism with attention-deficit hyperactivity disorder (ADHD) using family-based test in Korean trios. Methods-A total of 181 subjects with ADHD along with both of their biological parents were recruited from University Hospitals in Korea. We performed a transmission disequilibrium test (TDT) on 181 trios. Results-In the TDT, we found the over-transmission of the Val allele in children with ADHD (χ2=4.21, p=0.040). Conclusion-These results suggest that the COMT Val158-Met polymorphism is associated with ADHD among the Korean population. However, this study must be replicated in larger populations.

입력 전압 변화에 따른 공진형 무선전력전송 효율 분석

박희정(Heejeong Park),신중권(Jungkwon Shin),배진우(Jinwoo Bae),김종영(Jongyoung Kim),이가희(Gahee Lee ) 한국자동차공학회 2016 한국자동차공학회 학술대회 및 전시회 Vol.2016 No.11

광주지역 지하수 중 우라늄과 라돈의 함량 분포 특성

서희정(Heejeong Seo),민경우(Kyoungwoo Min),박지영(Jiyoung Park),박주현(Juhyun Park),황호연(Hoyeon Hwang),박세일(Seil Park),김선정(Seonjeong Kim),정숙경(Sukkyung Jeong),배석진(Seokjin Bae),김성준(Seongjun Kim) 한국환경보건학회 2022 한국환경보건학회지 Vol.48 No.2

Background: As high concentrations of uranium and radon have been detected in some areas in Korea, it is considered necessary to investigate natural radioactive materials in the Gwangju area. Objectives: This study aimed to identify the hydrochemical characteristics of groundwater in Gwangju and investigate the distribution characteristics of uranium and radon, which are naturally radioactive substances. Methods: To determine the uranium and radon concentrations in groundwater according to the geology of the Gwangju area, we measured 62 groundwater wells. A geological distribution map of uranium and radon content was prepared for this study. Results: The groundwater type, defined using a Piper diagram, was mainly Ca-HCO3. The concentration of uranium in the groundwater ranged from 0 to 29.3 µg/L, with a mean of 3.3 µg/L and a median of 0.9 µg/L. The median concentration of uranium in groundwater was highest in alluvium, granitic gneiss, and biotite granite (classified by geological unit), in that order. The concentration of radon in the groundwater ranged from 4.8 to 313.2 Bq/L, with a mean of 75.6 Bq/L and a median of 59.6 Bq/L. The median concentration of radon in groundwater was highest in biotite granite, alluvium, and granitic gneiss, in that order. As a result of the correlation analysis of groundwater in the study area, there was no significant correlation between uranium and radon. Conclusions: In this study area, uranium was shown to be far below the concentrations allowed by drinking water quality standards, but radon concentrations exceeded drinking water quality monitoring standards in 11% of the samples. It was judged that appropriate measures, such as the installation of radon reduction facilities, will be required after a thorough review of high-concentration radon detection sites of in the research area.

원자력안전정책의 책무성 확보체계 변화에 관한 연구

박희정(Park, Heejeong),서민승(Seo, Minseung) 한국지방정부학회 2022 지방정부연구 Vol.25 No.4

본 연구는 우리나라에서 원자력 안전과 관련하여 책무성 체계가 어떻게 변화해 왔는지 분석하였다. 이를 위해 원자력 안전 정책의 시기를 원자력법 시기(2011년 이전)와 원자력안전법 시기(2012-2020년)로 구분하여 살펴보았다. 우리나라의 원자력안전정책은 초기에 원자력진흥을 위한 부수적인 하위 정책으로 원자력진흥 총괄기관 주도의안전규제에 초점을 맞춘 관리적 책무성 확보가 위주였다. 그러나 민주화의 진전과 함께 일본 후쿠시마 원전사고의발생으로 원자력안전법이 제정되면서 독립적인 정책 영역으로 자리잡게 되었고 이에 따라 원자력 안전을 위한 공공책무성 관계가 확대･강화되기 시작하였다. 이러한 가운데서도 원자력 사고의 치명적 성격 탓에 안전규제에 중점을둔 관리적 책무성 도구 또한 강화되었다. 그리고 2021년 원자력안전소통법이 제정되면서 원자력 안전 책무성체계의 전환점을 제공하였다. 일반 공중을 위한 민주적 공공책무성 체계의 혁신은 현대 행정의 불가역적 경향이라는 점에서 국민생명에 직접적인 영향을 미치는 원자력 안전의 투명성과 책무성은 앞으로도 지속적으로 제고되어야 할 것이다. This study aims to analyze how the accountability system for nuclear safety has been changed in Korea. To this end, the study will also cover the changes of accountability parameters in nuclear safety-related laws, regulations, and policies over the time period ranging from 1958-2020, which is divided into Atomic Energy Act period(1958-2011) and Nuclear Safety Act period(2012-2020). The findings are as follows: i) During the period of Atomic Energy Act(AEA), the focus had been placed on the managerial accountability to ensure nuclear safety and stepped-up for all that time. ii) In the early period of AEA, public accountability system was insufficient and the vertical accountability relation was focused on the one between nuclear business operator and local residents, directly affected by nuclear power plant. But, in the later period, the vertical line had been extended to the relation between nuclear regulatory department and the public. iii) During the period of Nuclear Safety Act(NSA), public accountability to the public has been showed a steady rising tendency. Especially, the vertical and horizontal accountability line among stakeholders has been diversified and strengthened. iv) While the social accountability for public safety had been piecemeal during the AEA period, it has been conspicuous during the period of NSA due to the Japan s Fukushima Nuclear Plant accident in 2011. v) In terms of accountability tools, those had revolved around unilateral control instruments during the period of AEA. On the other hand, during the period of NSA, democratic accountability tools has been gradually introduced, which were initiated by mandate and governance innovation.

제주도 대정-한경 유역 효율적 지하수자원 관리를 위한 자료기반 연구

이소연(Soyeon Lee),정지호(Jiho Jeong),김민철(Minchul Kim),박원배(Wonbae Park),김유한(Yuhan Kim),박재성(Jaesung Park),박희정(Heejeong Park),박경태(Gyeongtae Park),정진아(Jina Jeong) 대한자원환경지질학회 2021 자원환경지질 Vol.54 No.3

본 연구에서는 자료기반 분석 기법을 이용하여 제주 대정-한경 유역의 군집형 지하수 이용 관정의 영향력을 평가하고 지하수자원을 효율적으로 관리하기 위한 도구를 개발하였다. 분석을 위해 대정-한경 유역 내 총 19개 지하수위 관측공의 지하수위 자료, 총 3개 기상 관측소로부터 측정된 강수량 자료, 및 총 4개의 군집형 지하수 이용 관정(저지, 금악, 서광, 및 영어교육도시)으로부터 획득한 이용량 자료가 이용되었다. 먼저, 각 지하수위 관측공에 대하여 강수량 및 이용량 자료를 입력변수로 하는 자료기반 지하수위 예측모델을 개발하였다. 이때, 과거의 장기적 변동특성을 효과적으로 학습에 이용하기 위하여 누적 장단기 메모리 모델을 이용하였다. 모든 관측 공에 대하여 지하수위 예측모델을 개발하고, 이용량 입력변수에 대한 섭동 민감도 분석을 수행하여 각 군집형 관정의 공간적 영향력을 분석하였다. 금악 수원은 해당 수원 중심으로 영향이 크고, 서광 수원은 하류 지역을중심으로 영향이 큰 것으로 나타났으며, 영어교육도시는 수원의 상류 지역 중심, 저지 수원은 수원 상류 및 하류 중심으로 영향이 나타났다. 그리고 유역 내 군집형 수원의 영향력은 대략 5km인 것으로 나타났다. 추가적으로, 학습된 예측모델을 기반으로 군집형 이용 관정의 영향 범위에 포함되는 지하수위 관측공에 대해 강수량 대비 배경 지하수위 회복을 위한 적정 지하수 이용량을 산정하였다. 최근의 강수 패턴을 적용하였을 때, 현재 지하수 이용량을 기존의 80%로 제한할 필요성이 있는 것으로 나타났으며, 강수량이 100mm 증가하였을 때, 대략 1,500 m3에서 1,900 m3의 추가적인 취수가 가능할 것으로 평가되었다. 본 연구를 통해 도출된 대정-한경 유역 지하수 거동특성 평가 결과와 자료기반 분석 도구들은 대정-한경 유역의 지속 가능한 지하수 개발을 위한 유용한 정보로 활용될 수 있을 것으로 판단된다. In this study, the impact of clustered groundwater usage facilities and the proper amount of groundwater usage in the Daejeong-Hangyeong watershed of Jeju island were evaluated based on the data-driven analysis methods. As the applied data, groundwater level data; the corresponding precipitation data; the groundwater usage amount data (Jeoji, Geumak, Seogwang, and English-education city facilities) were used. The results show that the Geumak usage facility has a large influence centering on the corresponding location; the Seogwang usage facility affects on the downstream area; the English-education usage facility has a great impact around the upstream of the location; the Jeoji usage facility shows an influence around the up- and down-streams of the location. Overall, the influence of operating the clustered groundwater usage facilities in the watershed is prolonged to approximately 5km. Additionally, the appropriate groundwater usage amount to maintain the groundwater base-level was analyzed corresponding to the precipitation. Considering the recent precipitation pattern, there is a need to limit the current amount of groundwater usage to 80%. With increasing the precipitation by 100mm, additional groundwater development of approximately 1,500m3-1,900m3 would be reasonable. All the results of the developed data-driven estimation model can be used as useful information for sustainable groundwater development in the Daejeong-Hangyeong watershed of Jeju island.

Two In-and-out Modulation Strategies for Endoplasmic Reticulum Stress-linked Gene Expression of Pro-apoptotic Macrophage-inhibitory Cytokine 1

Park, Seong-Hwan,Choi, Hye Jin,Yang, Hyun,Do, Kee Hun,Kim, Juil,Kim, Hyun-Hong,Lee, Heejeong,Oh, Chang Gyu,Lee, Dong Won,Moon, Yuseok American Society for Biochemistry and Molecular Bi 2012 The Journal of biological chemistry Vol.287 No.24