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성주현,이민욱,황성택,이주열,이지훈,Sung, Juhyun,Lee, Minuk,Hwang, Seongtaek,Lee, Juyeol,Lee, Jihoon 한국반도체디스플레이기술학회 2022 반도체디스플레이기술학회지 Vol.21 No.3
This paper presents a new blockchain based donation platform combined with a type of gaming application. The proposed donation platform is similar to existing play-to-earn (P2E), but it has different characteristics such as non-liquidated token and direct transfer to a celebrity donation organization. Moreover, it has advantages like a robustness for counterfeiting and falsification as well as enhanced donating experience.
한국 근로자에서의 물리적 인자 및 근무여건과 직업성 손상 간의 관련성
박정훈 ( Jung Hun Park ),성주현 ( Joo Hyun Sung ),심창선 ( Chang Sun Sim ),이찬부 ( Chan Boo Lee ),박상진 ( Sang Jin Park ),이지호 ( Ji Ho Lee ),이충렬 ( Choong Ryeol Lee ) 한국산업보건학회 2015 한국산업보건학회지 Vol.25 No.3
Objectives: The aim of this study is to evaluate the association between physical factors, working conditions and occupational injuries among Korean workers. Methods: We used data from the 2nd Korean Working Conditions Survey, conducted in 2010. A total of 7,114 workers over 15 years of age were selected from among 10,019 Korean workers. The participants were interviewed using questionnaires. A multiple logistic regression model was used to analyze the associations among physical factors, working conditions and occupational injuries. Results: After the adjustment of socio-demographic factors, the odds ratio of injuries through physical factors such as vibration (adjusted Odds Ratio [aOR] 4.037, 95% CI 2.30-7.09), noise (aOR 4.562, 95% CI 2.64-7.89), high temperature (aOR 3.262, 95% CI 1.86-5.73), and low temperature (aOR 3.358, 95% CI 1.76-6.41) were greater in the exposed group than in the non-exposed group. The odds ratios of occupational injury(aOR 5.272, 95% CI 3.19-8.7 for very high speed work, aOR 3.303, 95% CI 1.95-5.60 for tight deadlines, and aOR 3.641, 95% CI 1.72-7.70 for not enough time to work) increased with increased work demands. Conclusions: In this study, physical factors such as vibration, noise, and high and low temperatures were significantly correlated with occupational injuries according to the increase in exposure intensity(p for trend <0.001). Also, working conditions such as high-speed work, tight deadlines and insufficient time to work showed significant associations with occupational injuries(p for trend<0.001).
일 도시의 초등학교 학생의 수면습관과 행동, 정서, 주의력, 학습과의 관계
탁희종(Hee-Jong Tak),이지호(Ji-Ho Lee),이장명(Chang-Myung Lee),정석훈(Seok-Hoon Chung),이재원(Jae-Won Lee),심창선(Chang-Sun Sim),윤재국(Jae-Goog Yoon),성주현(Joo-Hyeon Sung),방수영(Soo-Young Bhang) 대한소아청소년정신의학회 2011 소아청소년정신의학 Vol.22 No.3
Objectives : The aim of this study was to investigate the sleep patterns of South Korean elementary school children and whether the differences in sleep patterns were related to behavior, emotional problems, attention and academic performance. Method : This study included a community sample of 268 boys and girls from fourth-, fifth- and sixth-grade classes in a South Korean metropolitan city from November to December 2010. The primary caregivers completed a questionnaire that included information on demographic characteristics, as well as the Child’s Sleep Habit Questionnaire (CSHQ), the Korean version of Child Behavior Checklist (K-CBCL), the Korean version of the Learning Disability Evaluation Scale (K-LDES), the Korean version of ADHD Rating Scale (K-ARS) and the Disruptive Behavior Disorder Scale (DBDS). We conducted analyses on the CSHQ individual items, between the subscales, on the total scores and on the K-CBCL, the K-LEDS, the K-ARS and the DBDS. Results : Based on the findings from the CHSQ, the subjects had significantly higher scores for bedtime resistance (9.18±2.17), delayed sleep onset (1.32±0.62), the sleep duration (4.19±1.52) and daytime sleepiness (14.10±3.55) than the scores from the previous reports on children from western countries. The total CHSQ score showed positive correlations to all subscales of the K-CBCL : withdrawn (r=0.24, p<.005), somatic complaint (r=0.24, p<.005) and anxious/depressive (r=0.38, p<.005). Bedtime resistance was associated with oppositional defiant disorder (r=0.15, p<.05) and a positive correlation was demonstrated between sleep anxiety and the oppositional defiant disorder score (r=0.13, p<.05), night waking and the conduct disorder score (r=0.16, p<.05). Delayed sleep onset was related with low performance on the K-LDES with respect to thinking (r=-0.17, p<.05) and mathematical calculation (r=-0.17, p<.05). Conclusion : The results of this study reconfirm Korean children’s problematic sleep patterns. Taken together the results provide that the reduced sleep duration and disruption of sleep pattern can have a significant impact on emotion, behavior, performance of learning in children. Further studies concerning more diverse psychosocial factors affecting sleep pattern will be helpful to understanding of the sleep health in Korean children.
임분구조 조정에 의한 평창지역 천연 활엽수림의 이단림 조성 방안
성주한 ( Joo Han Sung ),이영근 ( Young Geun Lee ),박고은 ( Ko Eun Park ),신만용 ( Man Yong Shin ) 한국산림과학회 2015 한국산림과학회지 Vol.104 No.3
This study was conducted to provide a method of establishing two-storied forests by the adjustment of stand structures in natural deciduous forests of Pyeongchang area. Three permanent sampling plots of 0.09 ha were established in study site and some tree variables were measured in each sampling plot before the treatment of two-storied system. Stand attributes and stand structures before treatment were estimated based on the data measured in sampling plots. The results indicate that the current stand status is different from typical stand structures of two-storied forests. A simulation technique was applied to predict stand attributes and stand structures after the treatment of two-storied system. Results suggest that significant time is required to accomplish target stand structures even after applying the treatment of two-storied system. Number of trees in the upper canopy class after treatment was predicted to be 170 trees/ha, which adequately meets the target of two-storied forests. It was predicted, however, that the lower canopy class trees has much less trees compared with the typical stand structures of two-storied forests. This problem could be solved with ingrowth of infant trees over time or by under-planting of tolerant species. It is confirmed that the target growing stock volumes of the upper canopy class should be approximately 150 m3/ha considering stand status after treatment. It is predicted that twenty years of conversion period is required to accomplish this goal. The changes in stand structures over time should be assessed based on stand inventory carried out every five years, and additional treatments for inducing two-storied forests should be applied if necessary.
성주현 ( Joo Hyun Seong ),박원주 ( Won Joo Park ),이종건 ( Jong Gun Lee ),최병일 ( Byoung Il Choi ) 한국안전학회(구 한국산업안전학회) 2016 한국안전학회지 Vol.31 No.6
Road Sink Phenomenon (RSP) is one of the major issues in South Korea. National and local governments are trying to develop effective preventive measures against the RSP. Developing the policy-oriented RSP management is most important to minimize possible losses induced by RSP. In this study, we employed the Futures Wheel (FW) method to derive influence factors for RSP management. FW method is widely used for predicting future social-environmental condition. In addition, RAND Corporation`s method is used to derive potential strategic agenda based on derived influence factors by FW method. These derived strategic agenda can contribute to develop the policies related with RSP management.