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- 저자 : 장진규(Jin Gyu Jang) (검색결과 30 건)
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방사광 X-선 영상법을 이용한 소수성 마이크로 관 내 물-글리세롤 혼합물 슬러그 계면 가시화를 통한 동적접촉각 상관식 검증
장진규 ( Jin Gyu Jang ),김영현 ( Young Hyun Kim ),김경준 ( Kyoung Joon Kim ),이정훈 ( Junghoon Lee ),이연원 ( Yeon Won Lee ),유동인 ( Dong In Yu ) 한국화학공학회 2022 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.60 No.1
움직이는 접촉선에서의 계면 거동을 이해하기 위해 많은 연구자들은 동적접촉각에 대한 연구를 지속적으로 연구해왔다. 하지만 가시화 기술의 한계로 선행연구에서의 동적접촉각에 대한 실험은 일반적으로 친수성 미세관에서 가시광선 기반으로 실험이 수행되었다. 하지만, 최근 다양한 연구 및 산업 분야에서 소수성 미세관에서의 동적접촉각에 대한 연구의 필요성이 대두되고 있다. 따라서, 본 연구에서는 높은 공간 및 시간 분해능을 갖는 방사광 X-선 영상법을 이용하여 소수성 마이크로 튜브 내 물-글리세롤 혼합물 슬러그의 동적접촉각을 측정하였으며, 이를 바탕으로 기존의 동적접촉각 실험 상관식을 검증하였다. Dynamic contact angles have investigated by numerous researchers for understanding interfacial behavior at moving contact lines However, due to limitation of visualization techniques, previous experiments for dynamic contact angles have conducted limitedly in hydrophilic capillary tubes based on visible ray. Recently, there is continuous need for research on dynamic contact angles in hydrophobic capillary tubes on various research and industrial fields. Therefore, in this study, we measure the dynamic contact angles of water-glycerol mixture slug in hydrophobic microtubes using synchrotron X-ray imaging. Based on the visualized data, we verified the previous experimental correlations for dynamic contact angles.
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장진규(Jin Gyu Jang),조현대,이광호,이혜진,김지선 과학기술정책연구원 2019 정책연구 Vol.- No.-
At the UNFCCC COP 21, participant countries discussed the establishment of “Post-2020 New Climate Changes Regime” as a novel approach to climate change issue differentiated from the existing Kyoto Protocol. 196 member states finally signed the Paris Agreement to reduce greenhouse gas emissions. South Korea’s National Assembly also ratified the Paris Agreement in November 2016. The country has set an emission reduction target of 37% from the business-as-usual level by 2030 and is striving to achieve this ambitious target. After the early effectuation of the Paris Agreement, countries around the world are pursuing the development of technologies required for the reduction of greenhouse gases. The developed countries are trying to transfer appropriate climate technologies to developing countries. South Korea is also expanding its R&D programs in climate technologies in order to secure its leading position in climate technology. South Korea’s R&D investment in technologies mitigating climate change is aimed at developing strategic technologies that can contribute to greenhouse gas reduction. In the meantime, South Korea is making preemptive investment in promising technologies that are expected to lead future climate change though the market for these technologies has not yet formed. Renewable energy technologies and other technologies mitigating carbon emissions are important and technologies that help utilize carbon as useful resources are also becoming increasingly important. The CCU (Carbon Capture Utilization) technology refers to a whole new production process using carbon dioxide as input to produce goods. Like this, CCU technology promotes production activities while mitigating carbon dioxide. Since 2016, South Korea has been implementing a national strategy of using carbon as resources. However, the lack of evaluation of carbon upcycling technology’s economic value is making it difficult for the South Korean government and its private sector to justify their efforts of developing and commercializing carbon upcycling technologies. The present study attempts to define methods of measuring the amount of greenhouse gas reduction and its economic value when the carbo upcycling technology development is completed successfully. In this context, this study is meaningful as it helps carbon upcycling technology developed as part of government initiative contribute to the achievement of greenhouse gas reduction targets home and abroad. This study is also significant as it objectively identifies carbon upcycling technology’s potential to help create new businesses. It is the research team’s wish that the results of the present study encourage both the government and companies to participate in the carbon upcycling technology development and commercialization, which will greatly enhance mid- and long-term national interests.
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우리나라 과학기술 국제화 정책 평가 - 과학기술 국제화 정책 진화과정 분석 -
장진규(Jin Gyu Jang),박환일,이명진,이우성,성경모,이혜진,홍사균,정성철 과학기술정책연구원 2019 정책연구 Vol.- No.-
Korea is evaluated to be one of the OECD countries, which are left behind from the viewpoint of S&T internationalization although Korea has been carrying out various related policies. There has been some analysis on the reasons why Korea is left behind in the S&T internationalization. For example, they say that there should be a big gap between policy directions and policy instruments of related government ministries for S&T internationalization, and ,moreover, there should be lack of connection among policy instruments of ministries which has been performing international S&T policies. However, we need to perform a systematic evaluation work on international S&T policies which have been carried out until now in order to draw more detailed reasons for tardy S&T internationalization, and to design more effective policies to make good progress in Korea"s S&T internationalization based on the evaluation results. In this context, this research aims to analyze the evolution process of international S&T policies by periods as a pre-work of evaluating them in earnest in the future. This research analyzes the contents and features of changes in Korea"s international S&T policies by periods and tries to understand the policy objectives, policy means, domestic and foreign policy environment and conditions by stages of development. Above all things, this research tries to draw very appropriate results in the sense that it is very essential to for us to grasp how international S&T policies have been changing or evolving in relation to the changes of Korea"s S&T policies since 1960s and to understand how the focus of international S&T policies has been changing and what have been the features of international S&T policies of Korea, facing the time that S&T internationalization strategy becomes very important for strengthening our S&T capabilities and advancing overseas. To make the comprehensive evaluation framework seems to be very indispensable for making the systematic policy evaluation and the evidence-based policy-making. Therefore, along with the performance of this research, we surely expect that full-fledged international S&T policy evaluation work will be done soon in the future just right after more complete framework for the evaluation is made based on the results of this research.
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적정 녹색기후기술에 대한 해외수요 조사 및 국제협력 활성화 방안
장진규(Jin Gyu Jang),박환일(Hwanil Park),박동배(Dong Bae Park),유하영(Ha Young Yu) 과학기술정책연구원 2017 정책연구 Vol.- No.-
In this research, we search for the overseas demand on green climate technology by developing countries through analyzing various related domestic and foreign reports and documents. We also select several specific green climate technologies demanded by such countries as Indonesia and Brunei and try to dig up related Korean technologies, which would be existing in private companies, public research institutes or universities, and to prepare some plans to boost global green climate technology transfer and commercialization. Especially, regarding demand analysis of green climate technology, we, first of all, analyze UNFCCC (UN Framework Convention on Climate Change) TNA (Technology Needs Assessment) database. Based on the result of analysis of UNFCCC TNA, we supply the characteristics of green climate technology demand by industry, country and ect. For the purpose of specifying the plans to boost global green climate technology transfer and commercialization, we deal with three real cases of appropriate green climate technologies. First one is the bio-energy production technology based on CCU (Carbon Capture and Utilization). Second one is the smart fish farm technology with solar renewable energy production system. Last one is the co-location model of fisheries with off-shore wind farm. We try to prepare some specific plans to facilitate the transfer and commercialization of each green climate technology above mentioned. In the conclusion part, we try to suggest several specific policy implications to boost international cooperation with green climate technologies. For example, we suggest the need for raising green climate fund to attain the goal of overseas mitigation of GHG (Green House Gas) emission.
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장진규(Jin Gyu Jang),이광승(Kwang Seung Lee),권대원(Dae Won Kwon),남기열(Ki Yeul Nam),최진호(Jin Ho Choi) 한국식품영양과학회 1983 한국식품영양과학회지 Vol.12 No.1
人蔘의 主要藥理成分으로 밝혀지고 있는 사포닌의 含量變化를 중심으로 하여 人蔘의 採掘年數의 診斷과 藥理作用에 대한 基礎資料를 얻기 위하여 栽培人蔘의 生育年數에 따른 總사포닌 含量의 變化, diol사포닌과 triol사포닌의 比較 및 PT/PD 比등을 調査하여 다음과 같은 結果를 얻었다.<br/> (1) 生育年數에 따른 總사포닌含量은 年根이 증가할 수록 總사포닌含量이 증가 하였는데 5年根에서 5.19%로 가장 높았으며 6年根에서는 4.80%로 오히려 감소하는 경향이었다.<br/> (2) 總사포닌含量만을 考慮한다면 6年根보다 5年根에서 採掘함이 바람직하다.<br/> (3) 生育年數에 따른 PT/PD比를 보면 年根이 증가할 수록 차차 증가하여 6年根이 0.51로서 가장높았으며 5年根의 0.48보다 6.25%나 더 높았다.<br/> (4) 따라서 PT/PD比의 증가량을 고려한다면 6年根에서 採掘함이 바람직 하였다. To determine harvesting time of ginseng, the changes of saponin contents and PT/PD ratios of triol saponin vs. diol saponin in relation to root age of Panax ginseng.<br/> Total saponin contents were increased in relation to root age, 5-years was higher than 6-years for saponin contents. Therefore, it considered that can be obtained the desired results to harvest at 5-years.<br/> Also, PT/PD ratios were increased in relation to root age, 6-years was highest. Considering PT/PD ratios in relation with pharmaceutical action, it must be harvested at 6-years.
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임용진,윤남식,장진규,Im, Yong-Jin,Yun, Nam-Sik,Jang, Jin-Gyu 한국섬유공학회 1987 한국섬유공학회지 Vol.24 No.5
To investigate the effect of carrier on the dyeability of poly(ethylen terephthalate)(PET) fiber, equilibrium dye uptake and initial dyeing temperature were measured and discussed in connection with solubility parameter. It was shown that the equilibrium dye uptake for carrier-added dyeing increased with smaller component solubility parameter difference between PET and carrier, and lower initial dyeing temperature. For carriers with similar solubility parameter and molar volume, the one which has phenyl ring and carbonyl group in its molecular structure exhibited greater carrier activity. In this experiment, the most effective carrier for PET fiber was benzaldehyde and acetophenone, which can interact with PET fiber most effectively by overlap of p-orbitals.
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