A5088363098- Microplastics and Plastic Pollution
- Laser Material Processing Techniques
- Recycling and Waste Management Techniques
- Ocular and Laser Science Research
- Laser-induced spectroscopy and plasma
- Surface Roughness and Optical Measurements
- Laser-Ablation Synthesis of Nanoparticles
- Marine Biology and Environmental Chemistry
- Marine and Coastal Research
- Shoulder and Clavicle Injuries
- Shoulder Injury and Treatment
- Welding Techniques and Residual Stresses
- Environmental Engineering and Cultural Studies
- Advanced Surface Polishing Techniques
- Identification and Quantification in Food
- Engineering Applied Research
- Advanced Optical Imaging Technologies
- biodegradable polymer synthesis and properties
- Solid State Laser Technologies
- Diamond and Carbon-based Materials Research
- Marine and Offshore Engineering Studies
- Diverse Approaches in Healthcare and Education Studies
- Trauma Management and Diagnosis
- Intracerebral and Subarachnoid Hemorrhage Research
- Additive Manufacturing Materials and Processes
East Asia Institute
2012-2025
Chonbuk National University Hospital
2022
Jeonbuk National University
2022
Kangwon National University
2022
Korea Forest Service
2022
Suwon Research Institute
2020-2021
Presbyterian Medical Center
2015
Pukyong National University
2012-2014
National Research Institute of Cultural Heritage
2012
Immune Modulatory Therapies (United States)
2008
It has been shown that the laser shock cleaning (LSC) method is effective for eliminating micron- and submicron-scale particulates from solid surfaces. In LSC process, a high-power pulse induces optical breakdown of ambient gas close to surface be cleaned subsequently-created wave followed by high-speed flow stream detaches particles. Therefore, there should strong correlation between dynamics performance. this work, experimental analyses are conducted measure performance using micron-sized...
해양 생물에 대한 교란은 해양쓰레기의 악영향 중 하나이다. 이 연구에서는 한국의 서해안에 있는 수하암이라는 섬에서 수행된 조사를 바탕으로 플라스틱 해양쓰레기를 포함하고 저어새 둥지의 비율이 계산되었다. 플라스틱을 비율은 2010년 71%에서 2011년 37%, 2012년 33%로 줄어들었다. 전체 개수는 28개에서 38개, 43개로 늘어났다. 번식지에 2011년과 2012년에 나뭇가지와 볏짚 등의 자연물 둥지 재료가 공급되었는데, 이런 보호 활동이 위와 같은 변화의 한 원인으로 보인다. 악영향을 줄이기 위해 추가적인 필요하다.
Laser removal of surface oxides and small particles from copper surfaces was carried out using a Q-switched Nd:YAG laser. Oxide layers on should be removed for the improvement solder quality printed circuit boards (PCBs) prevention failure or loss production yield during fabrication microelectronic devices. A selective achieved by laser treatment, which confirmed on-line acoustic monitoring process. An angular cleaning technique in irradiates at glancing angle used effective surface. The...
Surface cleaning based on the laser-induced breakdown of gas and subsequent plasma shock wave generation can remove small particles from solid surfaces. Accordingly, several studies were performed to expand capability process. In this work, process using (LIP) under geometrical confinement is analyzed both theoretically experimentally. Two-dimensional numerical analysis conducted examine behavior LIP for geometries. As a result analysis, we propose simple practical method amplify intensity...
전세계 플라스틱 해양쓰레기의 유입량과 현존량을 추정하였다. 한국에서 연간 유입량(72,956 톤)은 플라스틱의 소비량(5.2백만톤)의 1.4%로 추정되었다. 유출량이 0이라는 가정과 함께, 이 1.4% 유입률을 1950년부터 2013년까지 생산량에 적용함으로써, 2013년 해양쓰레기 유입량은 4.2백만톤이며, 2013년말 현재 현존량은 86백만톤으로 또한 로지스틱 모델에 따라, 석유생산량의 4%가 플라스틱으로 생산될 때 최종 199백만톤이 될 것으로 전혀 다른 측정단위이기 때문에, 유입 저감 정책의 효과성을 평가할 수 있는 개선된 지표가 필요하다. 또한, 오염은 거의 회복불가능하기 이를 예방하는 대책의 가치는 훨씬 더 높게 평가되어야 하며, 사전주의의 원칙에 따라 강력한 예방 대책이 시행되어야 한다. 본 연구는 제한적인 정보에 근거한 예비 연구에 해당하므로 현존량의 경향을 규명하기 위한 추가 연구가
Recent studies have demonstrated that micro/nano-scale particles can be removed effectively from solid surfaces by laser-induced plasma shockwaves. This work proposes a two-dimensional theoretical model for numerical simulation of the hydrodynamics and particle behavior in laser shock cleaning process. The spatial variation efficiency on surface pressure/temperature/velocity fields are analyzed simulation. Furthermore, predicts trajectory detached after shockwave passage. Parametric...
How landslide-triggering rainfall conditions vary with geology is unclear. The effects of three different geological (gneiss, GN; granite, GR; sedimentary rock, SR) on variations in intensity–duration (I-D) and characteristics responsible for initiating shallow landslides were examined using data from 476 South Korea 1963 to 2018 detailed statistical analyses. Results quantile regression one-way analysis variance analyses clearly showed that impermeable SR slopes result smaller critical than...