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Analysis of photovoltaic potential at abandoned mine promotion districts in Korea
Jinyoung Song,최요순,Suk-Ho Yoon 한국자원공학회 2015 Geosystem engineering Vol.18 No.3
The present study analyzed the photovoltaic (PV) potentials at seven abandoned mine promotion districts in Korea: Taebaek, Samcheok, Jeongseon, Yeongwol, Mungyeong, Hwasun, and Boryeong. A PV system with a capacity of 99 kW was considered at each abandoned mine promotion district. The estimated electric power productions and economic effects of PV systems were analyzed using RETScreen software developed by Natural Resources Canada (NRC). The results showed that the Boryeong district has the highest PV potential, with estimated electric power production of about 83.43 MWh/year, which means a present net value of 69.2 million KRW and a payback period of about 13 years.
Percutaneous Transcatheter Closure of Congenital Ventricular Septal Defects
Jinyoung Song 대한심장학회 2023 Korean Circulation Journal Vol.53 No.3
Ventricular septal defects (VSDs) are the most common kind of congenital heart disease and, if indicated, surgical closure has been accepted as a gold-standard treatment. However, as less-invasive methods are preferred, percutaneous device closure has been developed. After the first VSD closure was performed percutaneously by Lock in 1988, both techniques and devices have developed consistently. A perventricular approach for closure of muscular VSD in small patients and the closure of perimembranous VSD using off-label devices are key remarkable developments. Even though the Amplatzer membranous VSD occluder (Abbott) could not be approved for use due to the high complete atrioventricular conduction block rate, other new devices have shown good results for closure of perimembranous VSDs. However, the transcatheter technique is slightly complicated to perform, and concerns about conduction problems after VSD closure with devices remain. There have been a few reports demonstrating successful closure of subarterial-type VSDs with Amplatzer devices, but long-term issues involving aortic valve damage have not been explored yet. In conclusion, transcatheter VSD closure should be accepted as being as effective and safe as surgery but should only be performed by experienced persons and in specialized institutes because the procedure is complex and requires different techniques. To avoid serious complications, identifying appropriate patient candidates for device closure before the procedure is very important.
Song, Jinyoung The Korean Pediatric Society 2014 Clinical and Experimental Pediatrics (CEP) Vol.57 No.7
Transcatheter closure of atrial septal defects has become a popular procedure. The availability of a preprocedural imaging study is crucial for a safe and successful closure. Both the anatomy and morphology of the defect should be precisely evaluated before the procedure. Three-dimensional (3D) echocardiography and cardiac computed tomography are helpful for understanding the morphology of a defect, which is important because different defect morphologies could variously impact the results. During the procedure, real-time 3D echocardiography can be used to guide an accurate closure. The safety and efficiency of transcatheter closures of atrial septal defects could be improved through the use of detailed imaging studies.
학업중단 청소년의 사회적 낙인감이 스마트폰 중독에 미치는 영향 : 자아존중감과 자아탄력성의 매개효과를 중심으로
송진영 ( Song Jinyoung ),정경희 ( Jung Kyunghee ) 인하대학교 교육연구소 2021 교육문화연구 Vol.27 No.6
본 연구는 학업중단 청소년을 대상으로 사회적 낙인감이 스마트폰 중독에 어떠한 영향이 있는지, 그리고 자아존중감과 자아탄력성은 이들 간을 매개하는지 검증하는데 목적을 두었다. 이를 위해 본 연구는 한국청소년정책연구원에서 조사 배포한 학업중단 청소년 패널조사 5차년도 자료를 활용하였다. 자료분석은 SPSS를 이용하여 회귀분석을 수행하여 매개효과를 분석하고, sobel test를 수행하여 이를 추가적으로 검증하였다. 연구결과, 첫째, 사회적 낙인감이 스마트폰 중독에 영향이 있는 것을 확인하였다. 둘째, 사회적 낙인감과 스마트폰 중독 간에 자아존중감은 이들 간을 매개하는 것으로 나타났다. 셋째, 사회적 낙인감과 스마트폰 중독 간에 자아탄력성은 이들 간을 매개하는 것으로 나타났다. 이와 같은 연구 결과를 토대로, 사회적 낙인감의 감소와 자아존중감·자아탄력성의 향상을 통해 학업중단 청소년의 스마트폰 중독을 감소시킬 수 있는 방안에 대한 논의와 함의들을 제시하였다. This study examined how social stigma affects smartphone addiction and whether self-esteem and self-resilience mediate between them. Data from the 5th year of the panel survey on students who dropped out of school, which was researched and distributed by the Korea Youth Policy Institute, were used. Regression analysis was performed using SPSS to analyze mediating effects, and the Sobel test was performed to further verify this. First, it was confirmed that social stigma had an effect on smartphone addiction. Second, self-esteem was found to mediate between social stigma and smartphone addiction. Third, ego resilience was found to mediate between social stigma and smartphone addiction. Based on the results, discussions and implications to reduce smartphone addiction among adolescents who dropped out of school by reducing social stigma and improving self-esteem and self-resilience were presented.