• Journal of the Korean Society of Marine Environment & Safety
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• v.11 no.2 s.23
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• pp.103-108
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• 2005

For the development of a disk type oil skimmer for a tank lorry, a basic study on comparison of oil recovery performance between disk materials of oil skimmer was conducted. The experiment results are summarized as follows: In all the disks, the volume of recovery of bunker-A oil was greater than diesel oil. In light oil, there was nearly no differences in the volume of oil recovery by disk material, but in the case of bunker A oil, recovery efficiency showed big differences depending on the disk materials. For diesel oil, the differences in the volume of oil recovery per unit of operation time from the initial time zone were hardly shown. However, the volume of recovery of bunker-A oil linearly increased from the initial operation time in all the disks and the increase showed a slew moving trend as time. went on; therefore, the volume of oil recovery per unit of operation time showed differences depending on time. This result shows that oil viscosity has an effect on the disk recovery efficiency. When comparing the mass of pure oil recovery and the volume of water recovery in the total mass of recovery by bunker-A oil, there was no difference in the volume of oil recovery between the window-aluminum material disk and the disks consisting of other materials, but the volume of water recovery of the former was relatively very small This shows the most ideal result in view of oil recovery efficiency that considers the volume of water recovery. In conclusion, it was found that aluminum is the most advantageous as the material for tank lorry oil skimmer disk.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.1
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• pp.546-559
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• 2020

This study examined the effects of manipulative therapy interventions applied to alleviate menstrual discomfort caused by premenstrual syndrome (PMS) and dysmenorrhea. To identify all relevant articles, a search of the articles published from inception up to May 31, 2018 revealed 1,808 studies in eleven databases. Two researchers independently evaluated the quality assessment of theses for 30 studies (31 reports) that satisfied the inclusion criteria using RoB (Ris of Bias) and RoBANS (Risk of Bias Assessment tool for Non-randomized Studies). The data were analyzed by meta-analysis. The effect sizes of the intervention applied to alleviate PMS were -1.20 (95% confidence intervals (CI): -1.55 to -0.86) for foot reflexology, -0.44 (95% CI: -0.68 to -0.20) for auricular acupressure therapy, and -0.56 (95% CI: -0.80 to -0.32) for acupressure therapy. The effect sizes of the intervention applied to alleviate dysmenorrhea were -0.64 (95% CI: -1.07 to -0.20) for foot reflexology, -1.09 (95% CI: -1.46 to -0.71) for auricular acupressure therapy, and -0.75 (95% CI: -1.00 to -0.50) for acupressure therapy, -0.68 (95% CI: -1.08 to -0.27) for massage. This study suggests that the manipulative therapy is effective in alleviating the menstrual discomfort caused by dysmenorrhea and PMS.

• 대한방사선방어학회:학술대회논문집
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• 2009.11a
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• pp.158-159
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• 2009

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.33 no.3
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• pp.33-36
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• 2004

냉방에너지에 대한 분석과 전기냉방에 대한 가스냉방의 경제성 및 향후 가스냉방의 보급전망을 기술하였다. 가스냉방 부하 가스냉방은 80년대 중반부터 하절기 최대 전력수요 억제의 일환으로 보급이 본격화되기 시작했으며 가스 흡수식 냉방기 및 냉온수기의 공급으로 대규모 건축물의 냉난방에 대한 개념이 서서히 바뀌기 시작하였다. 92년 7월 “건축물의 냉방설비에 대한 설치 및 설계기준” 이 제정, 시행됨에 따라 일정규모 이상의 건축물에 중앙집중식 냉방설비 설치시 주간 최대 냉방부하의 60% 이상을 가스냉방 또는 축냉식으로 설치 의무화됨으로써 냉방은 물론 난방까지 겸하는 흡수식 냉온수기의 보급이 크게 증가하고 있다.(중략)

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2006.11a
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• pp.329-330
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• 2006

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.44-47
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• 2011

본 연구는 냉온수기에 사용되는 서모스탯을 예를 들어 전기기기에 온도컨트롤로 많이 사용되고 있는 서모스탯의 트래킹 화재 위험성 및 원인 분석을 위한 감정 기법에 관한 연구로서 트래킹을 발생시킬 수 있는 환경적 요인 및 오염액의 전도도 측정과 화재 후 트래킹에 의한 화재 원인 규명을 위한 감식 감정 기법에 관한 연구를 수행하여 화재 예방대책의 기초자료를 제시 하고자 한다.

• 한국상하수도협회지
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• s.28
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• pp.28-29
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• 2009

상하수도기술사라면 으레 엔지니어링 업체 전문가만이 취득할 수 있는 자격증이라고 생각하기 쉽다. 하지만 올해부터 실시된 협회의 최고 전문가 교육과정인 '상하수도 고급기술자 양성과정'을 통해 벌써 두 명의 기술사가 탄생했다. 한국수자원공사 설계사업처에 근무하는 현상락 씨(35세, 87회 기술사)와 울산광역시 상수도사업본부 환경연구사로 있는 박수이 씨(42세, 1차 합격)에게 그간 공부했던 방법과 합격의 비법이 들어보았다.

• Journal of Environmental Science International
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• v.3 no.2
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• pp.177-184
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• 1994

An air suction skimmer was selected as a potable skimmer to be developed among the many reviewed skimmers because of its advantages such as simple structure, excellent transportability, and easy deployment. A prototype of the skimmer was fabricated. It was shown that the skimmer operated by a commercial vacuum cleaner has good performance. The maximum suction rate of water and the maximum suction head were 18$m^3$/hr and 2.7m, respectively.

• Proceedings of the KIPE Conference
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• 2012.07a
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• pp.566-567
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• 2012

본 논문에서는 산성수를 전기분해하여 알칼리 이온수를 생성하는 정수 시스템을 제안하였다. 시스템은 크게 전해조, 냉각 유닛, 콤프레서, 정수?터 등으로 구성되어 있다. 특히 알칼리이온수를 생성하기 위해서는 전기분해를 위한 전력변환 회로가 필요하다. 본 논문에서는 알칼리이온수기를 위한 전해조 구동회로를 PSIM을 통한 검증 하였다.

• 보일러설비
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• s.7
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• pp.104-106
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• 1989