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Dr. Jung-Yeul Jung
Maritime Safety and Environmental Research Division, Korea Research Institute of Ships and Ocean Engineering (KRISO), Daejeon (34708), Korea

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0 Risk Assessment
0 Sensors
0 Heat and Mass Transfer
0 Colloid science
0 Maritime safety and environment

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Heat and Mass Transfer

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Journal article
Published: 11 May 2021 in Marine Pollution Bulletin
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The conventional survey of marine debris standing-stock has various drawbacks such as high cost and inaccuracy because the total amount of debris in the whole beach is inferred using the results of the manual investigation in selected narrow areas. To overcome the disadvantages, an automatic detection method using a deep learning-based network model was developed to detect and quantify the beach debris. The network model developed in this study classified items with a precision of 0.87 (87%) mAP and showed <5% error compared to actual survey. This study is the first fieldwork in Korea that shows the difference between automatic and conventional methods to predict the beach debris standing-stock. The results provide essential information for the development of effective beach debris management systems and policies.

ACS Style

Kyounghwan Song; Jung-Yeul Jung; Seung Hyun Lee; Sanghyun Park. A comparative study of deep learning-based network model and conventional method to assess beach debris standing-stock. Marine Pollution Bulletin 2021, 168, 112466 .

AMA Style

Kyounghwan Song, Jung-Yeul Jung, Seung Hyun Lee, Sanghyun Park. A comparative study of deep learning-based network model and conventional method to assess beach debris standing-stock. Marine Pollution Bulletin. 2021; 168 ():112466.

Chicago/Turabian Style

Kyounghwan Song; Jung-Yeul Jung; Seung Hyun Lee; Sanghyun Park. 2021. "A comparative study of deep learning-based network model and conventional method to assess beach debris standing-stock." Marine Pollution Bulletin 168, no. : 112466.

Journal article
Published: 03 December 2020 in Applied Sciences
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This study estimated availability of an air compression system and a nitrogen generation system in liquefied natural gas—floating production storage and offloading unit (LNG-FPSO) with different design stages to investigate the gap between the availability at the early design stage and that at the late design stage. Although availability estimation in the early design stage is more important than the late design stage, it is difficult to estimate the availability accurately in the early design stage. The design stage was divided into three depending on the design progress. Monte Carlo simulation technique was employed for the availability estimation. The results of the availability estimation showed that there was 0.434% difference between the early and late design stages. This meant that the availability in the early design stage was underestimated due to limited information. A sensitivity analysis was performed to investigate critical factors affecting the results. The investigated factors were failure rate, repair time, redundant equipment, and modified preventive maintenance schedule. The most critical factor was redundant equipment. It increased 0.486% availability.

ACS Style

Youngkyun Seo; Jung-Yeul Jung; Seongjong Han; Kwangu Kang. Availability Estimation of Air Compression and Nitrogen Generation Systems in LNG-FPSO Depending on Design Stages. Applied Sciences 2020, 10, 8657 .

AMA Style

Youngkyun Seo, Jung-Yeul Jung, Seongjong Han, Kwangu Kang. Availability Estimation of Air Compression and Nitrogen Generation Systems in LNG-FPSO Depending on Design Stages. Applied Sciences. 2020; 10 (23):8657.

Chicago/Turabian Style

Youngkyun Seo; Jung-Yeul Jung; Seongjong Han; Kwangu Kang. 2020. "Availability Estimation of Air Compression and Nitrogen Generation Systems in LNG-FPSO Depending on Design Stages." Applied Sciences 10, no. 23: 8657.

Research article
Published: 08 August 2020 in Biofouling
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Here, by creating different types of artificial barrier layer against bacterial attachment, anti-biofouling properties were endowed on three metallic surfaces – aluminum, stainless steel and titanium. To each metallic surface, a tailored chemical oxidation process was applied to grow scalable oxide structures with an additional appropriate coating, resulting in three different types of anti-biofouling barrier, a thin water film, an air layer and an oil layer. Fluorescence images of the attached bacteria showed that the water layer improved the anti-biofouling performance up to 8–12 h and the air layer up to 12–24 h, comparable with the lifetime of the air layer. In comparison, the oil layer exhibited the best anti-biofouling performance by suppressing the fouled area by < 10% up to 72 h regardless of the substratum type. The present work provides simple, low-cost, scalable strategies to enhance the anti-biofouling performance of industrially important metallic surfaces.

ACS Style

Kyounghwan Song; Jaehwan Shim; Jung-Yeul Jung; Choongyeop Lee; Youngsuk Nam. Endowing antifouling properties on metal substrata by creating an artificial barrier layer based on scalable metal oxide nanostructures. Biofouling 2020, 36, 766 -782.

AMA Style

Kyounghwan Song, Jaehwan Shim, Jung-Yeul Jung, Choongyeop Lee, Youngsuk Nam. Endowing antifouling properties on metal substrata by creating an artificial barrier layer based on scalable metal oxide nanostructures. Biofouling. 2020; 36 (7):766-782.

Chicago/Turabian Style

Kyounghwan Song; Jaehwan Shim; Jung-Yeul Jung; Choongyeop Lee; Youngsuk Nam. 2020. "Endowing antifouling properties on metal substrata by creating an artificial barrier layer based on scalable metal oxide nanostructures." Biofouling 36, no. 7: 766-782.

Short communication
Published: 20 April 2020 in Marine Pollution Bulletin
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In this study, we carry out environmental and economic loss analyses of the oil discharge from the shipwreck Jeh Hun. By performing 500 simulations of hypothetical oil spill cases, we obtain the minimum and worst damage cases. In the minimum damage case, there is just marine pollution without coastal pollution or aquaculture farm pollution. On the other hand, in the worst damage case, there is serious marine pollution, coastal pollution, and aquaculture pollution. The main purpose of the environmental and economic loss analyses is to support salvage planning for the shipwreck, because we have to consider the oil discharge from the shipwreck during oil removal and salvage. The results of this study show that the best salvage time is early morning in winter, when the northwest wind and maximum flood tide are dominant resulting in the spilt oil going forward into the open sea without coastal pollution and aquaculture pollution.

ACS Style

Moonjin Lee; Jung-Yeul Jung; Ki-Cheol Park; Sung-Hwan Choi. Environmental and economic loss analyses of the oil discharge from shipwreck for salvage planning. Marine Pollution Bulletin 2020, 155, 111142 .

AMA Style

Moonjin Lee, Jung-Yeul Jung, Ki-Cheol Park, Sung-Hwan Choi. Environmental and economic loss analyses of the oil discharge from shipwreck for salvage planning. Marine Pollution Bulletin. 2020; 155 ():111142.

Chicago/Turabian Style

Moonjin Lee; Jung-Yeul Jung; Ki-Cheol Park; Sung-Hwan Choi. 2020. "Environmental and economic loss analyses of the oil discharge from shipwreck for salvage planning." Marine Pollution Bulletin 155, no. : 111142.

Journal article
Published: 01 April 2020 in AIP Advances
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A chemical sensor was fabricated using indium-tin-oxide (ITO) films printed on biodegradable plastic substrates. The ITO layers were printed on polylactic acid (PLA) films. To optimize the printing...

ACS Style

Dongwan Ko; Junseck Choi; Joonyoung Seo; Jaeha Noh; Sangtae Lee; Jung-Yeul Jung; Moonjin Lee; Jiho Chang. Chemical sensing properties of indium-tin-oxide (ITO) printed films fabricated on biodegradable plastics. AIP Advances 2020, 10, 045228 .

AMA Style

Dongwan Ko, Junseck Choi, Joonyoung Seo, Jaeha Noh, Sangtae Lee, Jung-Yeul Jung, Moonjin Lee, Jiho Chang. Chemical sensing properties of indium-tin-oxide (ITO) printed films fabricated on biodegradable plastics. AIP Advances. 2020; 10 (4):045228.

Chicago/Turabian Style

Dongwan Ko; Junseck Choi; Joonyoung Seo; Jaeha Noh; Sangtae Lee; Jung-Yeul Jung; Moonjin Lee; Jiho Chang. 2020. "Chemical sensing properties of indium-tin-oxide (ITO) printed films fabricated on biodegradable plastics." AIP Advances 10, no. 4: 045228.

Journal article
Published: 09 September 2019 in Applied Sciences
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This study investigated the corrosion resistance of oil impregnated anodic aluminum oxide (AAO) surfaces of aluminum 7075 for subsea application. Although aluminum 7075 has high strength, it is scarcely used in the subsea industry because of its corrosion issue. Some treatment of aluminum 7075 is required for subsea application. In this study not only a plate shape but also a cylindrical shape were investigated because a cylindrical shape is frequently used in the subsea industry for electronic device housing. Contact angles of bare aluminum and oil impregnated AAO surfaces of aluminum 7075 were measured after a salt spray test and a pressure test. The results showed that the contact angle of bare aluminum was considerably decreased after the salt spray test, whereas the oil impregnated AAO surface presented a relatively high contact angle after the salt spray test and the pressure test. These results showed that the corrosion resistance of aluminum 7075 could be enhanced by oil impregnation on the AAO surface, and thus can be utilized in the subsea industry.

ACS Style

Youngkyun Seo; Jung-Yeul Jung; Jihoon Chung; Sangmin Lee. Enhancement of Corrosion Resistance of Aluminum 7075 Surface through Oil Impregnation for Subsea Application. Applied Sciences 2019, 9, 3762 .

AMA Style

Youngkyun Seo, Jung-Yeul Jung, Jihoon Chung, Sangmin Lee. Enhancement of Corrosion Resistance of Aluminum 7075 Surface through Oil Impregnation for Subsea Application. Applied Sciences. 2019; 9 (18):3762.

Chicago/Turabian Style

Youngkyun Seo; Jung-Yeul Jung; Jihoon Chung; Sangmin Lee. 2019. "Enhancement of Corrosion Resistance of Aluminum 7075 Surface through Oil Impregnation for Subsea Application." Applied Sciences 9, no. 18: 3762.

Article
Published: 01 August 2019 in Journal of Mechanical Science and Technology
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In this study, we carried out the characteristics analysis and experiment research of the developed technologies based on surface modifications to enhance the anti-corrosion performance of offshore equipments. The developed technologies are the dipping method to generate super-hydrophilic surface which is then treated to be super-hydrophobic using chemical deposition and lubricant impregnation, and the spray coating method to generate super-hydrophobic surface. It is well-known that the super-hydrophilic and super-hydrophobic surfaces have good anti-corrosion performance. However, the mechanical properties should be maintained. We have verified the anticorrosion performance through the salt spray test and the measuring contact angle. And, we have evaluated the mechanical characteristics such as hardness. As the results, the dipping and the spray coating methods improved the anti-corrosion performance maintaining its mechanical properties at the same coating thickness of about 80 nm.

ACS Style

Jae-Won Oh; Jung-Yeul Jung; Kyounghwan Song; Youngsuk Nam; Ki-Young Sung; Seungtae Oh; Jaehwan Shim. Characteristics analysis of the developed surface modification technologies to improve the anti-corrosion performances for offshore equipments. Journal of Mechanical Science and Technology 2019, 33, 3971 -3979.

AMA Style

Jae-Won Oh, Jung-Yeul Jung, Kyounghwan Song, Youngsuk Nam, Ki-Young Sung, Seungtae Oh, Jaehwan Shim. Characteristics analysis of the developed surface modification technologies to improve the anti-corrosion performances for offshore equipments. Journal of Mechanical Science and Technology. 2019; 33 (8):3971-3979.

Chicago/Turabian Style

Jae-Won Oh; Jung-Yeul Jung; Kyounghwan Song; Youngsuk Nam; Ki-Young Sung; Seungtae Oh; Jaehwan Shim. 2019. "Characteristics analysis of the developed surface modification technologies to improve the anti-corrosion performances for offshore equipments." Journal of Mechanical Science and Technology 33, no. 8: 3971-3979.

Short communication
Published: 28 December 2018 in Marine Pollution Bulletin
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In this study, a system was established to perform an initial environmental risk assessment of hazardous and noxious substances (HNS) spill accidents. Initial environmental risk assessment was performed using exposure and hazard assessments. An integrated hydrodynamic and chemical fate model was used to predict HNS concentrations at harbors, taking into account local environmental conditions. To consider the worst case HNS spill accident, the spill amount of 10,000 tonnages, was used for this study. The results show that highly soluble HNS are fatal to marine organisms during the neap tide. The results were based on a hypothetical worst case HNS spill accident and, not any specific actual HNS spill accident. Nevertheless, the method and system developed in this study, which includes the physical/chemical properties of 158 priority HNS, can be readily used to perform an initial environmental risk assessment for future HNS spill accidents.

ACS Style

Young-Ryun Kim; Moonjin Lee; Jung-Yeul Jung; Tae-Won Kim; Daejoong Kim. Initial environmental risk assessment of hazardous and noxious substances (HNS) spill accidents to mitigate its damages. Marine Pollution Bulletin 2018, 139, 205 -213.

AMA Style

Young-Ryun Kim, Moonjin Lee, Jung-Yeul Jung, Tae-Won Kim, Daejoong Kim. Initial environmental risk assessment of hazardous and noxious substances (HNS) spill accidents to mitigate its damages. Marine Pollution Bulletin. 2018; 139 ():205-213.

Chicago/Turabian Style

Young-Ryun Kim; Moonjin Lee; Jung-Yeul Jung; Tae-Won Kim; Daejoong Kim. 2018. "Initial environmental risk assessment of hazardous and noxious substances (HNS) spill accidents to mitigate its damages." Marine Pollution Bulletin 139, no. : 205-213.

Article
Published: 01 November 2018 in Journal of Mechanical Science and Technology
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In this study, reliability evaluation in conceptual design stage is performed to develop the dehydration package of offshore plant equipment. Dehydration package is commonly used in the gas treatment system but has still being developed. Since the technology for the dehydration package relies on almost 100 % in overseas companies, it is necessary to acquire the design/engineering technology for dehydration package. The design must also consider reliability and safety with the special characteristic of ocean environment and the danger of gas process. Therefore, the concept of adsorption dehydration package and design philosophy for development of dehydration package is derived through reliability evaluation in conceptual design stage in this study. After defining the equipment for dehydration package by IDEF0, reliability evaluation of conceptual design for the dehydration package is performed using fault tree analysis (FTA), based on the result of hazard identification (HAZID) analysis. In the future, this result will be applied in detail design.

ACS Style

Sanghyun Park; Jae-Won Oh; Su-Gil Cho; Kwangu Kang; Cheonhong Min; Jung-Yeul Jung. Reliability evaluation of conceptual design for the dehydration package. Journal of Mechanical Science and Technology 2018, 32, 5263 -5271.

AMA Style

Sanghyun Park, Jae-Won Oh, Su-Gil Cho, Kwangu Kang, Cheonhong Min, Jung-Yeul Jung. Reliability evaluation of conceptual design for the dehydration package. Journal of Mechanical Science and Technology. 2018; 32 (11):5263-5271.

Chicago/Turabian Style

Sanghyun Park; Jae-Won Oh; Su-Gil Cho; Kwangu Kang; Cheonhong Min; Jung-Yeul Jung. 2018. "Reliability evaluation of conceptual design for the dehydration package." Journal of Mechanical Science and Technology 32, no. 11: 5263-5271.

Journal article
Published: 29 October 2018 in Applied Surface Science
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We investigated the improved corrosion resistance of micro/nanostructured aluminum surfaces by varying wetting morphologies. By combining the wet-chemical oxidation schemes and low surface energy coating, we induced three different wetting morphologies including superhydrophilic, Cassie-mode superhydrophobic and Wenzel-mode hydrophobic on micro/nanostructured aluminum surfaces. The superhydrophilic oxide layers provided approximately 30%-76% improvement in the corrosion resistance compared to untreated ones. When a hydrophobic coating was added to the oxide layers and Cassie-mode superhydrophobicity was induced, all types of samples showed over 95 % increase in the corrosion resistance compared with untreated ones. When the air trapped on the superhydrophobic surfaces was removed in a vacuum environment, the corrosion resistance decreased but still provided 70% to 98% increase compared with untreated ones. The present work showed that the superhydrophobic treatment is a very effective way to improve the corrosion resistance but the proper choice of the passivation layer and hydrophobic coating can provide a meaningful increase in the corrosion resistance. The present work further clarified the high corrosion resistance of superhydrophobic aluminum surfaces and will help to develop practical anti-corrosion resistance surfaces.

ACS Style

Kyounghwan Song; Inkyu Kim; Soosik Bang; Jung-Yeul Jung; Youngsuk Nam. Corrosion resistance of water repellent aluminum surfaces with various wetting morphologies. Applied Surface Science 2018, 467-468, 1046 -1052.

AMA Style

Kyounghwan Song, Inkyu Kim, Soosik Bang, Jung-Yeul Jung, Youngsuk Nam. Corrosion resistance of water repellent aluminum surfaces with various wetting morphologies. Applied Surface Science. 2018; 467-468 ():1046-1052.

Chicago/Turabian Style

Kyounghwan Song; Inkyu Kim; Soosik Bang; Jung-Yeul Jung; Youngsuk Nam. 2018. "Corrosion resistance of water repellent aluminum surfaces with various wetting morphologies." Applied Surface Science 467-468, no. : 1046-1052.

Journal article
Published: 01 February 2018 in Ocean Engineering
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The mineral resources in deep-seabed are attracting extensive attention because terrestrial natural resources have become progressively depleted. To optimize the mining system for the deep-seabed minerals, the production rate and the solid fraction of liquid-solid slurry production should be estimated and measured, precisely. However, there are very unstable on-board conditions due to the wave, tide, etc. In this research, we studied on on-board measurement methodology to estimate the production rate and the solid fraction of the deep-seabed mining. We proposed a measurement technique using the measured data and physical properties of materials. The technique has been verified by the real sea experiment using pilot-scale lifting system. Also we performed the Fast Fourier Transform (FFT) analysis because there are significant noises in the measured data. As a result of the FFT analysis, we found that the causes of the noises were due to the vessel behavior by the wave energy and the sloshing effect of the slurry in the storage tank.

ACS Style

Jae-Won Oh; Jung-Yeul Jung; Sup Hong. On-board measurement methodology for the liquid-solid slurry production of deep-seabed mining. Ocean Engineering 2018, 149, 170 -182.

AMA Style

Jae-Won Oh, Jung-Yeul Jung, Sup Hong. On-board measurement methodology for the liquid-solid slurry production of deep-seabed mining. Ocean Engineering. 2018; 149 ():170-182.

Chicago/Turabian Style

Jae-Won Oh; Jung-Yeul Jung; Sup Hong. 2018. "On-board measurement methodology for the liquid-solid slurry production of deep-seabed mining." Ocean Engineering 149, no. : 170-182.

Proceedings article
Published: 07 June 2017 in Safety and Reliability – Theory and Applications
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ACS Style

Youngkyun Seo; Seongjong Han; Kwangu Kang; Hyon-Jeong Noh; Sanghyun Park; Jung-Yeul Jung; Daejun Chang; Marko Čepin; Radim Briš. Availability estimation of utility module in offshore plant depending on system configuration. Safety and Reliability – Theory and Applications 2017, 320 -320.

AMA Style

Youngkyun Seo, Seongjong Han, Kwangu Kang, Hyon-Jeong Noh, Sanghyun Park, Jung-Yeul Jung, Daejun Chang, Marko Čepin, Radim Briš. Availability estimation of utility module in offshore plant depending on system configuration. Safety and Reliability – Theory and Applications. 2017; ():320-320.

Chicago/Turabian Style

Youngkyun Seo; Seongjong Han; Kwangu Kang; Hyon-Jeong Noh; Sanghyun Park; Jung-Yeul Jung; Daejun Chang; Marko Čepin; Radim Briš. 2017. "Availability estimation of utility module in offshore plant depending on system configuration." Safety and Reliability – Theory and Applications , no. : 320-320.

Journal article
Published: 31 December 2016 in Journal of Ocean Engineering and Technology
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Risk-based Design of On-board Facility for Lifting System Field Test of Deep-sea Mining System Deep-sea mining system;Failure mode and effect analysis;Lifting system;On-board facility design;Risk-based design; This study had the goal of designing onboard structures for a pre-pilot mining test (PPMT), which is required for the commercialization of the deep-sea mining industry. This PPMT is planned to validate the performance of a hydraulic lifting system and verify the concept of operating through a moon-pool in the east sea, Korea. All of the onboard equipment and facility were designed by KRISO. Because the test was performed at the first development, it is difficult to determine what risk will occur in the facility. Therefore, risk-based design is required in the facility for the PPMT, which includes the facility layout, failure mode and effect analysis (FMEA), and risk reduction plan. All of the expected performances of the lifting system itself and the onboard facilities were qualitatively validated using the risk-based design.

ACS Style

Su-Gil Cho; Sanghyun Park; Jaewon Oh; Cheonhong Min; Seongsoon Kim; Hyung-Woo Kim; Tae Kyung Yeu; Jung Yeul Jung; Jaeil Bae; Sup Hong. Risk-based Design of On-board Facility for Lifting System Field Test of Deep-sea Mining System. Journal of Ocean Engineering and Technology 2016, 30, 526 -534.

AMA Style

Su-Gil Cho, Sanghyun Park, Jaewon Oh, Cheonhong Min, Seongsoon Kim, Hyung-Woo Kim, Tae Kyung Yeu, Jung Yeul Jung, Jaeil Bae, Sup Hong. Risk-based Design of On-board Facility for Lifting System Field Test of Deep-sea Mining System. Journal of Ocean Engineering and Technology. 2016; 30 (6):526-534.

Chicago/Turabian Style

Su-Gil Cho; Sanghyun Park; Jaewon Oh; Cheonhong Min; Seongsoon Kim; Hyung-Woo Kim; Tae Kyung Yeu; Jung Yeul Jung; Jaeil Bae; Sup Hong. 2016. "Risk-based Design of On-board Facility for Lifting System Field Test of Deep-sea Mining System." Journal of Ocean Engineering and Technology 30, no. 6: 526-534.

Rapid communication
Published: 19 September 2016 in ACS Applied Materials & Interfaces
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We demonstrate a cylindrical water triboelectric nanogenerator (CW-TENG) that generates sustainable electrical output. The inner surface of the cylinder was patterned into superhydrophobic and hydrophilic parts to control water flow inside the packaged design of CW-TENG. Here, various thicknesses and roughnesses of the superhydrophobic surface, generated using aluminum oxide nanostructures for enhanced electrostatic induction, were measured to obtain the maximum output and superhydrophobicity. Also, we demonstrate the possibility of using a hydrophilic surface for energy harvesting and as a water reservoir in the packaged design.

ACS Style

Sukyung Lee; Jihoon Chung; Dae Yun Kim; Jung-Yeul Jung; Seong Hyuk Lee; Sangmin Lee. Cylindrical Water Triboelectric Nanogenerator via Controlling Geometrical Shape of Anodized Aluminum for Enhanced Electrostatic Induction. ACS Applied Materials & Interfaces 2016, 8, 25014 -25018.

AMA Style

Sukyung Lee, Jihoon Chung, Dae Yun Kim, Jung-Yeul Jung, Seong Hyuk Lee, Sangmin Lee. Cylindrical Water Triboelectric Nanogenerator via Controlling Geometrical Shape of Anodized Aluminum for Enhanced Electrostatic Induction. ACS Applied Materials & Interfaces. 2016; 8 (38):25014-25018.

Chicago/Turabian Style

Sukyung Lee; Jihoon Chung; Dae Yun Kim; Jung-Yeul Jung; Seong Hyuk Lee; Sangmin Lee. 2016. "Cylindrical Water Triboelectric Nanogenerator via Controlling Geometrical Shape of Anodized Aluminum for Enhanced Electrostatic Induction." ACS Applied Materials & Interfaces 8, no. 38: 25014-25018.

Proceedings article
Published: 01 September 2016 in OCEANS 2016 MTS/IEEE Monterey
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Owing to huge casualty and environmental pollution caused by HNS(Hazardous and Noxious Substance) leakage, accurate prediction modeling must be crucial in coping with the accidents at the early stage. Our project finally aims to develop an engineering prediction model for accurate near-field prediction of diffusive behavior in risk regions, when HNS spills occur using CFD according to various environmental circumstances and risk scenarios. As part of results for achieving the final objectives, the present study conducted three-dimensional CFD simulations using the commercial CFD code, ANSYS FLUENT(V. 16.2) based on RANS(Reynolds-Averaged Navier-Stokes) equations with the standard k-ε model. In particular, VOF(Volume of Fraction) model was utilized for capturing the interface between two dissimilar phases. Also, the present work examines the influence of crack size and seawater velocity on the near-field diffusion characteristics of HNS. It was found that the leakage velocity and the spill-volume depended on the crack size, showing increasing tendency with the crack size. In addition, the crack size substantially affects the leakage behavior. Longitudinal leakage distance from crack area increased with the crack size, and after dissipation of longitudinal momentum, sea water velocity dominantly affected on the leakage behavior. The present results would be useful in making estimation model and understanding the detailed physics behind the near-field characteristics of HNS diffusion.

ACS Style

Chan Ho Jeong; Seong Hyuk Lee; Jung-Yeul Jung; Moon Jin Lee. Near-field leakage and diffusion characteristics of Hazardous and Noxious Substance. OCEANS 2016 MTS/IEEE Monterey 2016, 1 -4.

AMA Style

Chan Ho Jeong, Seong Hyuk Lee, Jung-Yeul Jung, Moon Jin Lee. Near-field leakage and diffusion characteristics of Hazardous and Noxious Substance. OCEANS 2016 MTS/IEEE Monterey. 2016; ():1-4.

Chicago/Turabian Style

Chan Ho Jeong; Seong Hyuk Lee; Jung-Yeul Jung; Moon Jin Lee. 2016. "Near-field leakage and diffusion characteristics of Hazardous and Noxious Substance." OCEANS 2016 MTS/IEEE Monterey , no. : 1-4.

Journal article
Published: 08 July 2016 in Journal of Heat Transfer
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The present study experimentally investigates the evaporative characteristics for a nanofluid droplet on heated surface. For experiments, the alumina (Al2O3) nanoparticles having a 50 nm average diameter were distributed in deionized (DI)water. The equilibrium contact angles (ECA) of DI-water on bare (without texturing) and hole-patterned textured (by µ-CNC machine) copper surfaces were 60o and 82o. Also, advancing and receding contact angles were 73.3o and 25.8o for bare surface, and 101.3o and 55.2o for textured surface. Surface temperature was fixed as 100±0.2oC, measured by resistance temperature detector (RTD) sensors with data logger. During the experiments, the ambient temperature was 22oC with the relative humidity of 32%. At the initial stage, the dynamic contact angle (DCA) of 0.01 vol.% nanofluid droplet on the textured surface drastically increased over its own ECA due to the generation of large bubbles inside the droplet. However, the contact angle of 0.1vol.% nanofluid droplet at t = 5 s was smaller than that of 0.01vol.% case because the increase in nanofluid concentration caused the reduction of surface tension. After that, DCA gradually decreased until dried out, and total evaporation time was significantly delayed in the case of textured surface. Moreover,the heat transfer characteristics during evaporation phenomenon was affected by the nanofluid concentration and the contact area with the heated surface.

ACS Style

Dae Yun Kim; Jae Bin Lee; Seong Hyuk Lee; Jung-Yeul Jung. Evaporative Characteristics of Al2O3 Nanofluid Droplet on Heated Surface. Journal of Heat Transfer 2016, 138, 080907 .

AMA Style

Dae Yun Kim, Jae Bin Lee, Seong Hyuk Lee, Jung-Yeul Jung. Evaporative Characteristics of Al2O3 Nanofluid Droplet on Heated Surface. Journal of Heat Transfer. 2016; 138 (8):080907.

Chicago/Turabian Style

Dae Yun Kim; Jae Bin Lee; Seong Hyuk Lee; Jung-Yeul Jung. 2016. "Evaporative Characteristics of Al2O3 Nanofluid Droplet on Heated Surface." Journal of Heat Transfer 138, no. 8: 080907.

Journal article
Published: 01 June 2016 in Journal of the Korean Institute of Electrical and Electronic Material Engineers
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ACS Style

Seokhwan Lee; Jieun Koo; Moonjin Lee; Jung-Yeul Jung; Jiho Chang. Optimization of Printing Process for the Development of Metal-oxide Resistivity Sensor. Journal of the Korean Institute of Electrical and Electronic Material Engineers 2016, 29, 353 -358.

AMA Style

Seokhwan Lee, Jieun Koo, Moonjin Lee, Jung-Yeul Jung, Jiho Chang. Optimization of Printing Process for the Development of Metal-oxide Resistivity Sensor. Journal of the Korean Institute of Electrical and Electronic Material Engineers. 2016; 29 (6):353-358.

Chicago/Turabian Style

Seokhwan Lee; Jieun Koo; Moonjin Lee; Jung-Yeul Jung; Jiho Chang. 2016. "Optimization of Printing Process for the Development of Metal-oxide Resistivity Sensor." Journal of the Korean Institute of Electrical and Electronic Material Engineers 29, no. 6: 353-358.

Articles
Published: 29 March 2016 in Biofouling
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This work reports on a nitinol (NiTi) surface modification scheme based on a chemical oxidation method, and characterizes its effects on wetting, biofouling and corrosion. The scheme developed is also compared with selected previous oxidation methods. The proposed method turns NiTi into superhydrophilic in ~5 min, and the static contact angle and contact angle hysteresis were measured to be ~7° and ~12°, respectively. In the PRP (platelet rich plasma) test, platelet adhesion was reduced by ~89% and ~77% respectively, compared with the original NiTi and the NiTi treated with the previous chemical oxidation scheme. The method developed provides a high (~1.1 V) breakdown voltage, which surpasses the ASTM standard for intervascular medical devices. It also provides higher superhydrophilicity, hemo-compatibility and anti-corrosion resistance than previous oxidation schemes, with a significantly reduced process time (~5 min), and will help the development of high performance NiTi devices.

ACS Style

K. Song; T. Min; J.-Y. Jung; D. Shin; Y. Nam. A superhydrophilic nitinol shape memory alloy with enhanced anti-biofouling and anti-corrosion properties. Biofouling 2016, 32, 535 -545.

AMA Style

K. Song, T. Min, J.-Y. Jung, D. Shin, Y. Nam. A superhydrophilic nitinol shape memory alloy with enhanced anti-biofouling and anti-corrosion properties. Biofouling. 2016; 32 (5):535-545.

Chicago/Turabian Style

K. Song; T. Min; J.-Y. Jung; D. Shin; Y. Nam. 2016. "A superhydrophilic nitinol shape memory alloy with enhanced anti-biofouling and anti-corrosion properties." Biofouling 32, no. 5: 535-545.

Journal article
Published: 01 February 2016 in Renewable Energy
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ACS Style

Jung-Yeul Jung; Ho Saeng Lee; Hyeon-Ju Kim; Yungpil Yoo; Woo-Young Choi; Ho-Young Kwak. Thermoeconomic analysis of an ocean thermal energy conversion plant. Renewable Energy 2016, 86, 1086 -1094.

AMA Style

Jung-Yeul Jung, Ho Saeng Lee, Hyeon-Ju Kim, Yungpil Yoo, Woo-Young Choi, Ho-Young Kwak. Thermoeconomic analysis of an ocean thermal energy conversion plant. Renewable Energy. 2016; 86 ():1086-1094.

Chicago/Turabian Style

Jung-Yeul Jung; Ho Saeng Lee; Hyeon-Ju Kim; Yungpil Yoo; Woo-Young Choi; Ho-Young Kwak. 2016. "Thermoeconomic analysis of an ocean thermal energy conversion plant." Renewable Energy 86, no. : 1086-1094.

Journal article
Published: 31 December 2015 in Journal of ILASS-Korea
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Characteristics for Nanofluid Droplet Evaporation on Heated Surface at Boiling Temperature of Base Liquid Nanofluid;Droplet;Evaporation;Heated surface;Boiling temperature; This study aims to experimentally investigate the evaporation characteristics of nanofluid droplet on heated surface at boiling temperature of DI-water. In particular, textured surface was used to examine the effect of wettability on evaporation. At the initial stage of evaporation process, dynamic contact angle (DCA) of nanofluid droplet with 0.01 vol.% concentration on textured surface rapidly increased over its equilibrium contact angle by generated large bubble inside the droplet due to lower wettability. However, contact angle of nanofluid droplet with higher concentration on textured surface decreased with surface tension. In addition, total evaporation time of droplet on textured surface was considerably delayed due to reduction of contact area between droplet and solid surface. Thus, evaporation characteristics were highly affected by the nanofluid concentration and surface wettability.

ACS Style

Dae Yun Kim; Jung-Yeul Jung; Seong Hyuk Lee. Characteristics for Nanofluid Droplet Evaporation on Heated Surface at Boiling Temperature of Base Liquid. Journal of ILASS-Korea 2015, 20, 236 -240.

AMA Style

Dae Yun Kim, Jung-Yeul Jung, Seong Hyuk Lee. Characteristics for Nanofluid Droplet Evaporation on Heated Surface at Boiling Temperature of Base Liquid. Journal of ILASS-Korea. 2015; 20 (4):236-240.

Chicago/Turabian Style

Dae Yun Kim; Jung-Yeul Jung; Seong Hyuk Lee. 2015. "Characteristics for Nanofluid Droplet Evaporation on Heated Surface at Boiling Temperature of Base Liquid." Journal of ILASS-Korea 20, no. 4: 236-240.