지역사회에서 형성된 사회적 지지와 근로자의 사회심리적 스트레스간의 관련성

임화영,김형수,최영환,장성훈,이건세,정최경희,오원기,최재욱,정춘화 대한산업의학회 2006 대한직업환경의학회지 Vol.18 No.4

Objective: This study was performed to examine the relationship between community-based social support and psychosocial distress in workers. Methods: The study subjects were 596 workers recruited from 11 companies in Chungju city. A structured questionnaire was used to assess sociodemographics, health-related behaviors, job characteristics, job stress, work-based social support, community-based social support and level of psychosocial distress. Results: Hierarchical multiple regression analysis showed that workers with no chronic disease, exercise and sufficient sleep had a higher score of psychosocial distress than those with chronic disease, no exercise, and not enough sleep. Coworker's work-based social support and community-based social support were negatively associated with psychosocial distress. The R square value of total independent variables on psychosocial distress was 0.409, and that of community-based social support on psychosocial distress was 0.052. Conclusion: This study showed that community-based social support served as a protective factor against psychosocial distress in some workers. We recommend the establishment of a worksite stress reduction program in occupational level as well as community-based social support.

S-277 Prognostic value of echocadiography for CKD patients with HF with reduced EF initiating hemodialysis

( Kyunghee Lim ),( Jin-oh Choi1 ) 대한내과학회 2016 대한내과학회 추계학술발표논문집 Vol.2016 No.1

Background: Heart failure (HF) is highly prevalent in patients with chronic kidney disease (CKD). Among the CKD patients initiating hemodialysis, left ventricular (LV) systolic dysfunction was reported up to 15 %. The aim of this study was to evaluate value of echocardiography to determine adverse cardiac outcomes in CKD patients with heart failure with reduced ejection fraction (HFrEF). Methods: In this retrospective study, we surveyed 843 patients with both advanced CKD and HF who were starting hemodialysis in our hospital during the period 2005 - 2015. HFrEF was defined by LVEF ≤ 50 % with symptoms of HF. We inspected echocardiography, comorbidity, medication, laboratory findings in 94 patients with advanced CKD and HFrEF. The primary endpoint was comparison of echocardiographic parameters between hospitalization group and non-hospitaliztion group and secondary endpoints was all cause mortality in between two group. Results: 40 (42 %) patients were hospitalized caused by HF, and 18 (19.1 %) patients were deceased. Before initiation of hemodialysis, LV end-systolic (LVIDs) and end-diastolic diameter (LVIDd) were higher in patients with experience of hospitalization due to HF than patients without hospitalization (LVIDd: 60.5±8.14 mm vs 56.5±7.16, p=0.016) (LVIDs: 46.5±9.2 vs 41.7±8.0, p=0.01). Also There was a difference in relative wall thickness (RWT) between the two groups (0.334±0.073 vs 0.365±0.077, p=0.047) The 4.3-year survival rates of two group were 93.2% and 56.4 respectively by the Kaplan-Meier survival estimation (p=0.005). Conclusions: In CKD with HFrEF, LVIDs, LVIDd and RWT were strong predictors for adverse cardiac outcomes. Identification and measurement of LVIDs, LVIDd, RWT significantly improve risk stratification in high risk population

A Survey of Korean Science Teachers and Strudents' Perceptions Regarding Science Teaching and Science-Technology-Society(STS) Themes

Choi, Kyunghee EAST WEST EDUCATION RESEARCH INSTITUTE EWHA WOMANS 1995 East west education Vol.16 No.-

Two-dimensional van der Waals nanosheet devices for future electronics and photonics

Choi, Kyunghee,Lee, Young Tack,Im, Seongil Elsevier 2016 NANO TODAY Vol.11 No.5

<P><B>Abstract</B></P> <P>Two dimensional (2D) van der Waals (vdW) nanosheet semiconductors have recently attracted much attention from researchers because of their potentials as active device materials toward future nano-electronics and – optoelectronics. This review focuses on the performance and applications of state-of-the-art vdW 2D material devices which use transition metal dichalcogenides, graphene, hexagonal boron nitride (h-BN), and black phosphorous: field effect transistors (FETs), complementary metal oxide semiconductor (CMOS) inverters, Schottky diode, and PN diode. High mobility in FETs, electrical switching dynamics in CMOS inverter, photovoltaic switching for dynamic energy harvesting in PN diode, and high current driving FETs for organic light emitting diode pixel switching are demonstrated, however, remaining important issues for future electronics and photonics applications are also introduced. As a final contribution of this review, the ultimate orientations for future applications of 2D devices are forecasted and suggested, which are toward ubiquitous electronics to be a part of internet of things as integrated with existing semiconductor devices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Review most of 2D vdW-based electronic and optoelectronic devices. </LI> <LI> Include all 2D vdW FET and LED using TMDs, graphene, and h-BN in the review. </LI> <LI> Point out remaining issues of currently-reported vdW devices toward future practical applications. </LI> <LI> Suggest new type of devices such as 2D-1D hybrid PN diodes and metal semiconductor field effect transistors. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Smoking, drinking, and physical activity among Korean adults before and during the COVID-19 pandemic: a special report of the 2020 Korea National Health and Nutrition Examination Survey

Choi Sunhye,Bahk Jinwook,Park Suyeon,Oh Kyungwon,Jung-Choi Kyunghee 한국역학회 2022 Epidemiology and Health Vol.44 No.-

OBJECTIVES: This study aimed to describe trends in health behaviours between 2011 and 2020 and compare the changes in these behaviours between the 2020 COVID-19 pandemic and previous periods according to socio-demographic variables.METHODS: This study used data from the 2011 to 2020 Korea National Health and Nutrition Examination Survey. Current cigarette smoking, high-risk drinking, and inadequate physical activity levels were used as health behaviour indicators. The age-standardized prevalence, differences in prevalence between the periods, and the annual percentage change (APC) were calculated.RESULTS: Current cigarette smoking showed a decreasing trend (APC, -2.6), high-risk drinking remained unchanged, and inadequate physical activity levels increased (APC, 3.5) during 2011-2020. There were significant differences in high-risk drinking (3.1%p; 95% confidence interval [CI], 0.3 to 5.9) and inadequate physical activity levels (4.3%p; 95% CI, 0.4 to 8.1) between 2019 and 2020 in men. Among men, increased high-risk drinking was found in those aged 40-49 years, non-single households, urban residents, and the middle and highest income groups between 2019 and 2020. The low educational group and manual workers among men aged 30-59 years also showed an increased proportion of high-risk drinking. Inadequate physical activity levels also increased among men between 2019 and 2020 in those aged 30-39 years, non-single households, urban residents, and the upper-middle-income group.CONCLUSIONS: In the first year of the COVID-19 pandemic, Korean men’s high-risk drinking and inadequate physical activity levels increased. In addition to social efforts to reduce the spread of infectious diseases, active measures to positively change health behaviour are needed.

A Study on Learning to Write English Interrogative Sentences

Kyunghee Choi 한국영어어문교육학회 2012 영어어문교육 Vol.18 No.2

This paper aims to discuss the effects of learning how to write English interrogative sentences. 122 students who participated in the study learned basic structural components of English questions and practiced writing questions by inversing the subject and the verb in a given declarative sentence. The participants were divided into two groups: Group 1 which was given a brief explanation of interrogative structures and practices, and Group 2 which was given the same explanation and practices in addition to an assignment for which they had to make one or two comprehension questions based on reading a passage. For the pre-tests and the post-tests, they took a TOEIC reading test with 40 questions and a structure test with 25 questions. The results of the tests show that both groups improved significantly in the two post-tests, benefiting from this learning method. However, the additional treatment for Group 2 did not seem to be highly effective. In the questionnaire survey, the participants think that the method of learning English questions has helped them better understand English grammar as well as interrogative structures. The participants were also divided into three different levels: high, intermediate, and low. The intermediate level group students benefited most from learning writing questions as the results of the post-test of the 25-questions test and the final exam of the course show.

The COVID-19 Pandemic Response System at University Level : The Case of Safe Campus Model at Ewha Womans University

Kyunghee Jung-Choi,Nackmoon Sung,Sun Hwa Lee,Misun Chang,Hee Jung Choi,Chung-Jong Kim,Nam-Kyong Choi,Hanna Kim,Yi-Jun Kim,Whanhee Lee,Hyesook Park,Eunhee Ha Ewha Womans University School of Medicine 2022 EMJ (Ewha medical journal) Vol.45 No.4

In response to the changes in the Coronavirus disease 2019 (COVID-19) epidemic situation, Ewha Womans University established Ewha Safe Campus (ESC), an on-campus infection outbreak management system, to allow students and faculty members to safely resume face-to face classes in 2022. The COVID-19 testing station, Ewha Safe Station, is the core element of ESC. Symptomatic students and faculty members perform a combo swab self-PCR test or receive a nasopharyngeal swab PCR test from experts to prevent the spread of COVID-19 through early detection and management. ESC is significant in that it detects infection risks and proactively implements preemptive measures in a university. The COVID-19 health response system model at the university level was applied for the first time in South Korea, reaching a milestone in the history of university health in South Korea. In particular, it is highly valuable that the test was free of charge, as it enabled all of the examinees to have easy access to the test through joint cooperation with the Seegene Medical Foundation. This is a successful example of cooperation between schools and private institutions for public health improvement. In the future, the direct and indirect effects of the establishment and implementation of ESC need to be evaluated and confirmed, and areas requiring improvements need to be identified in preparation for another infectious disease outbreak in the future.

Neurological Complications Resulting from Non-Oral Occupational Methanol Poisoning

Choi, Ji-Hyun,Lee, Seung Keun,Gil, Young-Eun,Ryu, Jia,Jung-Choi, Kyunghee,Kim, Hyunjoo,Choi, Jun Young,Park, Sun Ah,Lee, Hyang Woon,Yun, Ji Young The Korean Academy of Medical Sciences 2017 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.32 No.2

<P>Methanol poisoning results in neurological complications including visual disturbances, bilateral putaminal hemorrhagic necrosis, parkinsonism, cerebral edema, coma, or seizures. Almost all reported cases of methanol poisoning are caused by oral ingestion of methanol. However, recently there was an outbreak of methanol poisoning via non-oral exposure that resulted in severe neurological complications to a few workers at industrial sites in Korea. We present 3 patients who had severe neurological complications resulting from non-oral occupational methanol poisoning. Even though initial metabolic acidosis and mental changes were improved with hemodialysis, all of the 3 patients presented optic atrophy and ataxia or parkinsonism as neurological complications resulting from methanol poisoning. In order to manage it adequately, as well as to prevent it, physicians should recognize that methanol poisoning by non-oral exposure can cause neurologic complications.</P>

A Study on the Effects of Socioaffective Strategies on Reading Comprehension

( Kyunghee Choi ) 범태평양 응용언어학회 2003 Journal of Pan-Pacific Association of Applied Ling Vol.7 No.1

Exposure to environmental chemicals among Korean adults-updates from the second Korean National Environmental Health Survey (2012–2014)

Choi, Wookhee,Kim, Suejin,Baek, Yong-Wook,Choi, Kyungho,Lee, Keejae,Kim, Sungkyoon,Yu, Seung Do,Choi, Kyunghee Elsevier 2017 International journal of hygiene and environmental Vol.220 No.2

<P><B>Abstract</B></P> <P>National biomonitoring program can offer solid scientific evidence on exposure profiles of environmental chemicals at a national level, and provide a snapshot of changing exposure level over time. Therefore, several countries have maintained such programs for developing environmental health policies. The Korean National Environmental Health Survey (KoNEHS) was designed to understand the level of human exposure to environmental chemicals by time and location, and to identify possible sources of such exposure. The 2nd stage of KoNEHS, which was conducted between 2012 and 2014, examined a total of 6478 adult subjects over 19 years of age, and measured 21 environmental chemicals of major policy concern. Compared to the findings from the first stage monitoring (2009–2011), slightly higher levels of blood lead were observed, while those of mercury remained similar. Blood metal concentrations, however, were higher than those reported from national biomonitoring programs of United States, Germany and Canada. The urinary concentrations of phthalates metabolites were lower, but those of t,t-muconic acid and BPA were higher than those reported in the first stage survey. The urinary cotinine level decreased perhaps reflecting general declining patterns of first- and second-hand smoking. The results of the second stage survey were made available for public use since April 2016.</P> <P>Some policy efforts appear to be at least in part effective on mitigating chemical exposure among people, e.g., urinary phthalate metabolites and cotinine, while further confirmations are warranted. In-depth assessments will be conducted to identify vulnerable groups and important exposure pathways.</P>