http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김일호(Ilho Kim),이순복(Soon-bok Lee) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
In this study, two types of fatigue tests were conducted. First, cyclic bending tests were performed using the micro-bending tester. A four-point bending test method was adopted, because it induces uniform stress fields within a loading span. Second, thermal fatigue tests were conducted using a pseudo power cycling machine which was newly developed for a realistic testing condition. The pseudo-power cycling method makes up for the weak points in a power cycling and a chamber cycling method. Two compositions of solder are tested in all test condition, one is lead-free solder (95.5Sn4.0Ag0.5Cu) and the other is eutectic lead-contained solder (63Sn37Pb). In the cyclic bending test, the solder that exhibits a good reliability can be reversed depending on the load conditions. The lead-contained solders have a longer fatigue life in the region where the applied load is high. On the contrary, the lead-free solder sustained more cyclic loads in the small load region. A similar trend was detected at the thermal cycling test. A three-dimensional finite element analysis model was constructed. A finite element analysis using ABAQUS was performed to extract the applied stress and strain in the solder joints. A constitutive model which includes both creep and plasticity was employed. Thermal fatigue was occurred due to the creep. And plastic deformation is main damage for bending failure. From the inelastic energy dissipation per cycle versus fatigue life curve, it can be found that the bending fatigue life is longer than the thermal fatigue life.
UV/H<sub>2</sub>O<sub>2</sub> 공정에서 램프 출력에 따른 하수처리수 내 PPCPs 제거
김일호 ( Ilho Kim ),( Hiyaw Hatiya Ware ),( Jesmin Akter ),이재엽 ( Jae-yeop Lee ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
PPCPs are one of the emerging contaminants in aqueous solution. These compounds are low in concentration and difficult to detect that range from ng/l to μg/l. previous studies shows the difficulty of removal these compounds using conventional methods due to technology barrier with detection equipment, but current research seems to solve these problems due to the advancement of technology. UV/H<sub>2</sub>O<sub>2</sub> are One of prior technology process that researcher used to study and remove these compounds to the range of non-detectable value. In this experiment, the removal of PPCPs compound to the range of non-detected value from treated sewage using UV/H<sub>2</sub>O<sub>2</sub> process was the main focus area. The objective were to investigate the Optimal UV lamp output power in the removal of these emerging contaminants using UV/H<sub>2</sub>O<sub>2</sub> process. 20% (1.6KW) UV-Output was used and comparison were made with other literature review with respect to the characteristics of effluent of treated sewage. Removal of TOC were also included in this experiment. For this experiment actual sewage were used and medium pressure lamp. Propranolol were undetected after the experiment in the actual treated sewage using LC-MSMS apparatus to the UV lamp output power. Detail information were given on the materials and methods and also result were discussed plus conclusion was made in this paper.
UV/H<sub>2</sub>O<sub>2</sub> 공정에서 램프 출력에 따른 하수처리수 내 PPCPs 제거
김일호 ( Ilho Kim ),( Hiyaw Hatiya Ware ),( Jesmin Akter ),이재엽 ( Jae-yeop Lee ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
PPCPs are one of the emerging contaminants in aqueous solution. These compounds are low in concentration and difficult to detect that range from ng/l to μg/l. previous studies shows the difficulty of removal these compounds using conventional methods due to technology barrier with detection equipment, but current research seems to solve these problems due to the advancement of technology. UV/H<sub>2</sub>O<sub>2</sub> are One of prior technology process that researcher used to study and remove these compounds to the range of non-detectable value. In this experiment, the removal of PPCPs compound to the range of non-detected value from treated sewage using UV/H<sub>2</sub>O<sub>2</sub> process was the main focus area. The objective were to investigate the Optimal UV lamp output power in the removal of these emerging contaminants using UV/H<sub>2</sub>O<sub>2</sub> process. 20% (1.6KW) UV-Output was used and comparison were made with other literature review with respect to the characteristics of effluent of treated sewage. Removal of TOC were also included in this experiment. For this experiment actual sewage were used and medium pressure lamp. Propranolol were undetected after the experiment in the actual treated sewage using LC-MSMS apparatus to the UV lamp output power. Detail information were given on the materials and methods and also result were discussed plus conclusion was made in this paper.
하수 2차 처리수의 UV/H<sub>2</sub>O<sub>2</sub> 처리
김일호 ( Ilho Kim ),( Hiyaw Hatiya Ware ),( Jesmin Akter ),이재엽 ( Jae-yeop Lee ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
This paper summarizes the effect of various initial H<sub>2</sub>O<sub>2</sub> concentration on the removal of TOC from the tested water. UV/H<sub>2</sub>O<sub>2</sub> process consider the most suitable method for the removal of organic pollutants in the tested water. various range of dose of H<sub>2</sub>O<sub>2</sub> were used thus 20, 50, and 100 mg/L. UV only process also consider to compare the impact of H<sub>2</sub>O<sub>2</sub> in the removal of TOC from tested water. For the tested water 9% TOC removal were achieved using UV only process. considering the tested water was actual treated sewage (secondary) the impact of UV in the removal efficiency seems good. Half of the TOC concentration were removed in the end experiment for the tested water and the maximum dose of H<sub>2</sub>O<sub>2</sub> produce the highest removal efficiency. The final treated effluent sample TOC concentration was 4 mg/L within 420 seconds only. In this experiment UV/H<sub>2</sub>O<sub>2</sub> with 50 mg/L dose shows 44% of TOC removal with only 300 seconds contact time. The removal rate for UV/H<sub>2</sub>O<sub>2</sub> with 100 mg/L after 300 second shows less change compare to the 50mg/L H<sub>2</sub>O<sub>2</sub> dose. It seems the removal efficiency did not increase as expected due to the formation of the hydroxyl radical from the H<sub>2</sub>O<sub>2</sub> was not visible as expected from the result to react with the tested water pollutants. even if the degradation rate of the H<sub>2</sub>O<sub>2</sub> was high it does not indicate the formation of hydroxyl radical ruther it will act as scavengers for the tested water. Further investigation can be done for the actual treated sewage since most research area focus on the synthesis kind of tested water. it will show us the actual impact of UV/H<sub>2</sub>O<sub>2</sub> process in sewage treatment plant.