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보건설에 따른 영산강의 조류 발생 및 환경 변화: 수질측정망 장기 자료 분석
신용식 ( Yongsik Shin ),유행선 ( Haengsun Yu ),이학영 ( Hakyoung Lee ),이다혜 ( Dahye Lee ),박건우 ( Gunwoo Park ) 한국하천호수학회(구 한국육수학회) 2015 생태와 환경 Vol.48 No.4
The effect of weir construction (2009~2011) was investigated on algal bloom dynamics and surrounding conditions in the Youngsan River by analyzing the long-term (2001~2014) data provided by the Water Information System, Ministry of Environment. The data include chlorophyll a and water properties such as total suspended solids (TSS), ammonium (NH4 +), nitrate (NO3-), orthophosphate (PO43-), total nitrogen (TN), total phosphorus (TP) and DIN/DIP molar ratio collected from 12 stations along the channel of the river. Temporal variations were examined using data collected monthly from 2001~2014 and Box-Whisker plot was used to examine the difference in algal bloom dynamics between before (2006~2008) and after (2012~2014) the weir construction. Pearson``s correlation analysis was also used to analyze the correlation of parameters. The results showed that TSS affecting water turbidity increased during the construction but decreased especially at the stations located in the upper and middle regions of the river after the construction. Ammonium concentrations increased whereas the concentrations of other nutrients decreased after the construction inducing an increase in N:P molar ratio. Chlorophyll a decreased suddenly during the construction but increased clearly after the construction at the stations where TSS decreased. This indicates that algal blooms can develop in the Youngsan River due to a decrease in turbidity that increases light penetration in water column although the concentrations of nutrients such as orthophosphate were reduced after the weir construction.
윤하얀,신용식,Yoon, Hayan,Shin, Yongsik 한국해양생명과학회 2017 한국해양생명과학회지 Vol.2 No.2
This study examined the environmental characteristics of shore pollution sources in the southern part of the Sinan, Jangsando area in the West Coast of Korea. A shoreline survey of the watershed was conducted to identify the pollution sources and measure the water discharge rate and microbial hygiene of water and finally estimate the possible impact area of pollution. Forty five of pollution sources in total were identified and they were grouped into sewage (33), agriculture waste water (1) and waste water from inland fish farm (11). Nine among them were discharged into the seawater and discharge volume was 72,857~281,250 l/min. Fecal coliforms of St. 72 (sewage) and St. 74 (shrimp farm) were 490 MPN/100 ml and 49 MPN/100 ml and the impact zones of the pollution were 4,389 m and 1,900 m respectively.
조석에 따른 영산강 하구의 물리적 환경 및 식물플랑크톤 크기구조: 소조기
박건우 ( Geon-woo Park ),이다혜 ( Da-hye Lee ),신용식 ( Yongsik Shin ) 한국환경과학회 2017 한국환경과학회지 Vol.26 No.3
To understand the changes in physical parameters and phytoplankton size structure caused by tides, a fixed station in the Youngsan River estuary was monitored at 2-h intervals, on April 28, 2012 and August 12, 2012. No clear relationship was observed between the temperature and salinity changes and tidal levels in April. However, in August, temperature decreased during the ebb tide and increased during the flood tide, while salinity showed the opposite trend. In addition, there was no specific change in the phytoplankton biomass corresponding to tidal levels in April. In August, the total chlorophyll a and the biomass of net phytoplankton (>20 ㎛) increased almost 20 times during the ebb tide and decreased during the flood tide. The biomass of nanophytoplankton (<20 ㎛) showed a similar variation in response to tidal level changes. In April, the relationship between percent contributions of phytoplankton size structure and tidal levels was not clear. In August, the net phytoplankton was dominant in the early stage and nanophytoplankton was dominant in the later stage, while contribution of nanophytoplankton and net phytoplankton increased at high tide and low tide, respectively. Therefore, in April, other factors such as freshwater discharge were more important than the tide, whereas in August, when no freshwater discharge was recorded, the changes in semidiurnal tides influenced the physical parameters and phytoplankton dynamics. These results could contribute to the understanding of phytoplankton dynamics in the Youngsan River estuary.
모션캡쳐 기술을 활용한 모바일 콘텐츠 개발에 관한 연구
신용식 우송대학교 2004 우송대학교 논문집 Vol.9 No.-
Motion Capture is the process of capturing the movement of a real object and mapping it onto a computer generated object. Usually, Motion Capture is used to create synthetic actors by capturing the motions of real humans. Nowadays, 3D entertainment and education is rapidly coming to the internet and mobile and Motion Capture systems allow rapid and compelling content development. The purpose of this thesis is to review motion capture technology and to find a way to put motion capture technology to practical use of developing entertainment and education contents