$Ar/N_2 및 Kr/N_2$혼합가스의 교류절연파괴 특성

이상우,김인식,이동인,이광식,김이국,Lee, Sang-Woo,Kim, In-Sik,Lee, Dong-In,Lee, Kwang-Sik,Kim, Lee-Kook 대한전기학회 2001 전기학회논문지C Vol.50 No.12

In this paper, the ac breakdown characteristics of pure Ar, Kr and $N_2$ gas with gas pressure range of 58.8-137.3[kPa] under uniform and non-uniform fields were investigated, and the measured values were compared with those In Ar/$N_2$ and Kr/$N_2$ gas mixtures with pressure varying. Summarizing the experimental results, the breakdown voltages of Pure $N_2$gas, under uniform and non-uniform fields, were increased about 4.8 and 1.1 times than those of pure Ar gas, and about 4.4 and 1.2 times than those of pure Kr gas, and the ac breakdown voltage increased with the pressure increasing. The breakdown voltages of Ar/$N_2$ gas mixtures were decreased with decreasing the mixture ratio of Pure $N_2$ gas. In case of Ar(85%)/$N_2$ (15%) and Ar(70%)/$N_2$ (30%) gas mixtures comparing to the pure Ar gas, the breakdown voltages under uniform field were increased about 1.8 and 2.2 times, and under non-uniform field were increased about 1.1 and 1.3 times at the pressure of 101.3[kPa]. Also, in case of Kr(85%)/$N_2$ (15%) and Kr(70%)/$N_2$ (30%) gas mixtures comparing to the pure Kr gas, the breakdown voltages under uniform field were increased about 1.7 and 2.0 times, and under non-uniform field were increased about 1.0 and 1.2 times. Corona inception voltage of Kr(70%)/$N_2$(30%) gas mixtures under non-uniform fields were increased about 1.28 times than those of Ar(70%)/$N_2$ (30%) gas mixtures. In case of practical incandescent lamps, luminous and lifetime of Kr(70%)/$N_2$ (30%) gas mixtures were increased about 1.15 and 1.21 times than those of Ar(70%)/$N_2$ (30%) gas mixtures.

중국 데이터 보안체계 구축에 관한 연구 - 데이터안전법 심의과정에서의 쟁점사항을 중심으로 -

이상우(Lee, Sang-Woo) 영남대학교 중국연구센터 2021 중국과 중국학 Vol.- No.44

현재 전(全)세계적으로 약 100여 개 국가⋅지역에서 데이터 안보와 관련된 법률을 제정하였으며, 데이터 안보에 관한 특별 법안은 국제 관행이 되었는바, 중국 당국도 빈번해지는 국경 간 데이터 흐름 속에서 자국의 국익, 기업과 개인의 이익을 보호하기 위한 중국의 데이터 보안체계 구축의 필요성이 대두되었다. 이와 같은 배경 아래 중국 공산당 중앙위원회는 데이터 안전을 강화하고 디지털경제 발전을 촉진하기 위한 일련의 조치를 취하였으며, 전국인민대표대회 상무위원회는 데이터 보안체계를 구축하기로 한 중앙위원회의 요구사항에 따라 데이터 보안 관련 입법을 적극 추진하게 되었다. 2020년 7월 3일 「데이터안전법(초안)」이 공개된 이후 세 번의 심의과정을 거쳐 2021년 6월 10일 13기 전국인민대표대회 상무위원회는 제29차 회의에서 「데이터안전법」을 최종 통과시켰다. 「데이터안전법」은 데이터 분야의 기본법이자 국가안보 분야의 중요법률로서 2021년 9월 1일부터 시행 중이다. 총 7장, 55개 조항으로 구성된 「데이터안전법」」은 초안의 기본 골자를 그대로 유지하고 있으나, 몇 가지 쟁점사항과 관련한 조항은 세 차례 심의를 거치면서 치열하게 논의되었고, 최종 수정⋅보완 및 신설되었다. 이에 본고에서는 초안의 데이터 안전 보호를 위한 중점제도를 분석했던 선행연구(이상우 2021, pp.451-501)를 기반으로 하여, ① 초안의 51개 조항이 심의과정에서 어떠한 수정작업을 거쳐 최종안의 55개 조항이 되었는지를 검토⋅분석해보고, ② 주요쟁점사항과 관련한 상무위원회 위원들의 견해와 입장을 살펴보도록 하겠다. 중국과 우리나라, 양국 모두 빅테크 기업이 주도하는 데이터 기반의 디지털경제 활성화와 데이터 보안 강화라는 공통된 과제를 가지고 있는바, 심의과정을 살펴 앞으로의 중국 데이터 보안체계를 전망해 보고, 쟁점사항에 대한 중국 입법기관의 고민을 이해하는 기회로 삼아 우리나라 관련 입법에의 시사점을 도출해 보는 것에 의의를 두고자 한다. About 100 countries and regions around the world have enacted laws related to data security at the moment. Special legislation on data security has become an international practice. The Chinese authorities need to build a data security system to protect their national interests and those of companies and individuals amidst the cross-border data flow. Against this background, the Central Committee of the Communist Party of China has taken a series of measures to strengthen data security and revitalize the digital economy. The Standing Committee of the National People’s Congress actively promoted legislation related to data security in accordance with the requirements of the Central Committee of the Communist Party of China to build a data security system. After the 「Data Security Law(draft)」 was released on July 3, 2020, it went through three deliberation processes. On June 10, 2021, the 「Data Security Law」 was finally passed at the 29th meeting of the Standing Committee of the 13th National People’s Congress. The 「Data Security Law」 is a basic law in the data field and an important law in the field of national security, and became enforceable beginning September 1, 2021. The 「Data Security Law」, which consists of 7 chapters and 55 articles, maintains the basic gist of the draft. However, the provisions related to several issues were debated fiercely after going through three deliberation. It was finalized and supplemented. This article is based on a previous study(Lee, Sang-Woo 2021, pp.451-501) that analyzed the draft for a system of data security protection. This article will ① review and analyze how the 51 articles of the draft went through the deliberation process to become the 55 articles of the final version, and ② examine the views and positions of the members of the Standing Committee on major issues related to data security. Both China and Korea have the common task of revitalizing the data-based digital economy led by big tech companies and strengthening data security. Therefore, this article will look at the deliberation process and predict the future of China’s data security system. In addition, it will be meaningful to understand the concerns of the Chinese legislative body regarding the issues and to draw implications for the related legislation in Korea.

실무자 인터뷰를 통한 청주시 아동 그룹홈의 주거 개선 요구 조사

이상우,이민서,우자강,이현정,Lee, Sang Woo,Yi, Minseo,You, Zikang,Lee, Hyun-Jeong 인천대학교 도시과학연구원 2020 도시과학 Vol.9 No.2

The purpose of this study was to assess needs for housing improvement of children group homes in Cheongju-si through interviews with the group home directors and staffs. From April 6, 2018, to April 25, 2018, a series of face-to-face interviews with four directors and three staffs working in four children group homes was conducted. The results were analyzed using thematic analysis technique. Highlights of major findings and implications were as follow: (1) Bedroom: Needs for independent bedrooms and desks for each child were dominant. (2) Common activity space: Interviewees showed somewhat different opinions on common activity spaces according to group home types and/or between directors and staffs. (3) Between "a big and good-quality house" and "a house in good location", interviewees were found to prefer "a big and good-quality house" in order for children to have enough space to run and play. (4) Interviewees insisted that to provide proper group home services and protection similar to a real family, current policy to accommodate up to eight children in one group home should be improved.

중국증권시장의 정보이전효과에 관한 연구

이상우,이의경,Lee, Sang-Woo,Lee, Eui-Kyung 한국데이터정보과학회 2012 한국데이터정보과학회지 Vol.23 No.6

본 논문은 중국의 상해, 심천, 홍콩증권시장간의 정보이전효과를 연구한 것이다. 세 개의 중국 증권시장은 모두 미국의 증권시장수익률에 강하게 영향을 받는데 그 정도는 개방화가 제일 잘된 홍콩증권시장이 가장 크며 상해증권시장, 심천증권시장의 순으로 영향을 받는 것으로 나타나고 있다. 상해증권시장이나 심천증권시장은 서로 간에 수익률이전효과나 변동성전이효과가 존재하지 않지만 이 두 시장은 모두 홍콩증권시장수익률의 영향을 받는 것으로 나타났다. 하지만 미국증권시장의 움직임을 통제하면 이러한 효과는 사라지게 되어 중국의 증권시장간의 정보이전효과는 존재하지 않는 것으로 나타나고 있다. 이러한 결론은 중국의 세 개의 증권시장이 상호독립적인 성격이 강하다는 것을 의미하며, 중국의 증권시장 연구 시 시장 간의 독립성을 반영해야 할 것으로 생각된다. This study examines stock market co-movement among three China stock markets: Shanghai stock market, Shenzhen stock market, Hongkong stock market. US stock market leads three China stock markets and Honkong stock market leads Shanghai and Shenzhen stock market. But there are no lead-lag effects among China stock markets after controlling US stock market effect. These results could be important for the investors and firms that are interested in China stock markets.

소형 연료전지 연계형 DC GRID 부하 특성

이상우,이상철,권오성,배준형,박태준,강진규,이동하,Lee, Sang-Woo,Lee, Sang-Cheol,Kwon, O-Sung,Bae, Jun-Hyung,Park, Tae-Joon,Kang, Jin-Kyu,Lee, Dong-Ha 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.suppl3

In recent years, understanding the dynamics of DC distribution system has become critically important due mainly to the increasing needs for the interconnection of DC distributed generators and the (DC-based) electric vehicle (EV) charging systems. In this paper, the characteristics of the DC grid system connected to the compact proton exchange membrane fuel cell (PEMFC) has been studied. In particular, the voltage and current transient phenomena were measured by varying the load of the DC grid system. Also, the voltage and current ripple were measured at the different load conditions. Our experimental results clearly manifested that the study contributes to the establishment of fundamental method to characterize the small DC grid system including distributed generation.

RF 스퍼터링법을 이용한 $LiNbO_3/Si$구조의 전기적 및 구조적 특성

이상우,김광호,이원종,Lee, Sang-Woo,Kim, Kwang-Ho,Lee, Won-Jong 한국전기전자재료학회 1998 전기전자재료학회논문지 Vol.11 No.2

The $LiNbO_3$ thin films were prepared directly on Si(100) substrates by conventional RF magnetron spurttering system for nonvolatile memory applications. RTA(Rapid Thermal Annealing) treatment was performed for as-deposited films in an oxygen atmosphere at 600 $^{\circ}C$ for 60 s. The rapid thermal annealed films were changed to poly-crystalline ferroelectric nature from amorphous of as-deposition. The resistivity of the ferroelectric $LiNbO_3$ film was increased from a typical value of $1{\sim}2{\times}10^8{\Omega}{\cdot}cm$ before the annealing to about $1{\times}10^{13}{\Omega}{\cdot}cm$ at 500 kV/cm and reduced the interface state density of the $LiNbO_3/Si$ (100) interface to about $1{\times}10^{11}/cm^2{\cdot}eV$. Ferroelectric hysteresis measurements using a Sawyer-Tower circuit yielded remanent polarization ($P_r$) and coercive field ($E_c$) values of about 1.2 ${\mu}C/cm^2$ and 120 kV/cm, respectively.

호기성환경에서 비소의 지구화학적 거동에 미치는 미생물의 영향 및 오염 복구에의 적용 가능성

이상우,김경웅,이종운,Lee, Sang-U,Kim, Gyeong-Ung,Lee, Jong-Un 대한자원환경지질학회 2001 자원환경지질 Vol.34 No.4

높은 함량의 비소로 오염된 지역으로부터 분리해 낸 토착미생물들이 비소 지구화학에 미치는 영향을 조사하였다. Arsenite는 arsenate에 비하여 더욱 높은 미생물 성장 저해효과를 나타내었다. Arsenate를 함유한 배양액에 분리된 미생물들을 24시간 동안 배양한 결과, arsenate의 함량이 높을수록 미생물들의 성장은 감소하였으며 150mM 이상의 arsenate 조건에서는 성장이 확연히 중단되었다. 그러나, 동일 배양액에서 4일간에 걸쳐 추가 배양한 결과 미생물들의 성장이 다시 관찰되었으며 이는 미생물들이 비소를 해독하고 성장을 유지할 수 있도록 그들의 생화학적 기능을 조절하였음을 의미한다. 분리된 것 중 두 종의 미생물을 arsenate를 함유한 배양액에서 20시간 가량 배양한 결과, arsenate를 arsenite로 환원시켰음이 관찰되었고 이는 해독기제에 의한 것으로 추측된다. 또한 동일조건의 배양액에서 4일간 추가 배양한 결과 총 용존 비소함량의 감소가 관찰되었다. 미생물은 자연조건에서 비소의 화학종 결정에 영향을 미치며 이러한 특성은 비소로 오염된 지역의 복구에 유용하게 사용되어 질 수 있을 것으로 예상된다. The effects on arsenic geochemistry of indigenous microorganisms isolated from an area contaminated with high concentration of arsenic were investigated. Arsenite exerted higher inhibitory effects on the microbes' growth than arsenate. During incubation of the microbes in an arsenate-spiked medium over 24 hours, decrease in microbial growth was observed as arsenate content increased. Arsenate of 150 mM or over apparently inhibited cell growth. However, further incubation for up to 4 days in the high arsenate concentration medium resulted in cell growth, implying that the microorganisms adjusted their biochemical functions to detoxify arsenic and maintain growth. Two types of microbes were observed during 20 hours to reduce arsenate to arsenite in solution through a detoxification mechanism. As well, decrease in the total arsenic content occurred over a 4-day incubation with the same microbes in an arsenate-spiked medium. Therefore it is suggested that microorganisms can influence arsenic speciation in natural settings and this may be applied to efficient bioremediation of arsenic-contaminated sites.

랫드에서 TSH와 갑상선 호르몬에 미치는 dopamine계의 영향

이상우,김진상,한정희,Lee, Sang-woo,Kim, Jin-sang,Han, Jeong-hee 대한수의학회 1992 大韓獸醫學會誌 Vol.32 No.2

The present study was carried out to investigate the effects of dopaminergic drugs and the role of specific dopamine(DA) receptors on the release of TSH, $T_4$ and $T_3$. Serum TSH levels (cold-induced, $4{^{\circ}C}$) were determined using RIA(radioimmunoassay) at 30 min after administration of dopamine agonists and antagonists. Serum $T_4$ and $T_3$ levels were detected after these dopaminergic drugs were administered subcutaneously twice a day for a week. The results of the study are summarized as follows : Apomorphine, a nonspecific DA receptor agonist, produced a dose-depedent decrease in serum TSH, $T_4$ and $T_3$ levels. However, only low doses (0.3, 1.0mg/kg) of SKF38393, a specific $D_1$-receptor agonist, produced a decrease in serum lelvels of TSH. I,Y171555, a specific $D_2$-receptor agonist, produced a dose dependent decrease in serum TSH, $T_4$ and $T_3$ levels. However, SCH23390, a specific $D_1$-receptor antagonist, produced a decrease except in serum T levels which were increased dose dependently. High doses (1.0, 3.0mg/kg) of sulpiride, a specific $D_2$-receptor antagonist, made a increase in the serum levels of TSH and $T_3$. The effects of dopaminergic drugs in serum TSH and $T_4$ levels was potentiated by the pretreatment of apomorphine. The overall results of this study suggest that the regulation of TSH, $T_4$ and $T_3$ secretion were mediated via specific $D_1$ and $D_2$ receptor.

원산지규정 분석을 통한 수출 중고품에 대한 FTA 특혜관세 활용방안

이상우,이춘수,Sang-Woo Lee,Chun-Su Lee 한국국제상학회 2015 國際商學 Vol.30 No.2

오늘날 무역거래의 대상은 대부분 신품인 경우가 많으나, 최근 물품의 내구성이 증대되 면서 중고차량, 중고기계 등 중고품의 무역거래량도 점차 늘어나고 있는 추세를 보이고 있 다. 이에 중고품에 대한 FTA 특혜관세 활용방안 및 법적 근거에 대한 검토가 필요하다. 그 러나 중고품의 경우 기존 FTA 협정에서 관련 규정이 거의 없기 때문에 중고품이 FTA 특혜 관세의 대상이 될 수 있는지의 여부, 중고품에 대한 원산지판정 방법 등의 문제를 논하는 데에 한계가 있다. 본 연구는 수출 중고품의 FTA 활용현황과 활용상의 문제점을 파악하고, FTA 협정문에 서 규정하고 있는 중고품 관련 원산지규정분석을 통해 중고품의 FTA 특혜관세활용방안을 모색하는데 연구목적을 두고 있다. 특히, 중고품관련 원산지규정 분석을 각 국가별 체결협정 대상으로 검토하기 위해서 중고품의 FTA 특혜관세 적용 가능성 파악을 위한 FTA 협정 상 관련 규정에 대한 검토, 원산지결정기준의 충족 여부에 대한 검토 그리고 신품의 원산지 지위의 중고품 승계문제를 다루고 중고품 수출시 특혜관세 활용방안을 위해 시스템구축 사례를 제시한다. The objective of this study is to grasp the FTA utilization status for used goods that are exported and the problems related to utilization, and to grope for a plan to utilize the FTA preferential tariffs by analyzing rules of origin specified in FTAs in relation to used goods. This study performed a literature review utilizing secondary sources and interview. For used goods, as there are almost no related provisions in the existing FTAs, there are limitations in discussing issues such as whether used goods can be an object of an FTA preferential tariff or not, and the method to determine the county of origin of used goods. Accordingly, cooperation from original manufactures is required for utilization of the FTA preferential tariff on used goods, and a plan to institutionalize such a part should be arranged. Also, rules of origin for used goods is required to be separately specified to allow easier application differently from that of new goods considering the present situation where utilization is practically difficult.

물리화학적 처리를 이용한 군부대 사격장 내 중금속 오염 토양의 정화

이상우,이우춘,이상환,김순오,Lee, Sang-Woo,Lee, Woo-Chun,Lee, Sang-Hwan,Kim, Soon-Oh 한국지하수토양환경학회 2021 지하수토양환경 Vol.26 No.5

This study evaluated the feasibility of combined use of physical separation and soil washing to remediate heavy metals (Pb and Cu) contaminated soil in a military shooting range. The soils were classified into two types based on the level of heavy metal concentrations: a higher contaminated soil (HCS) with Pb and Cu concentrations of 6,243 mg/kg and 407 mg/kg, respectively, and a lower contaminated soil (LCS) with their concentrations of 1,658 mg/kg and 232 mg/kg. Pb level in both soils exceeded the regulatory limit (700 mg/kg), and its concentration generally increased with decreasing soil particle size. However, in some cases, Pb concentrations increased with increasing soil particle size, presumably due to the presence of residues of bullets in the soil matrix. As a pretreatment step, a shaking table was used for physical separation of soil to remove bullet residues while fractionating the contaminated soils into different sizes. The most effective separation and fractionation were achieved at vibration velocity of 296 rpm/min, the table slope of 7.0°, and the separating water flow rate of 23 L/min. The efficiency of ensuing soil washing process for LCS was maximized by using 0.5% HCl with the soil:washing solution mixing ratio of 1:3 for 1 hr treatment. On the contrary, HCS was most effectively remediated by using 1.0% HCl with the same soil:solution mixing ratio for 3 hr. This work demonstrated that the combined use of physical separation and soil washing could be a viable option to remediate soils highly contaminated with heavy metals.