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Template-Assisted Electrochemical Growth of Hydrous Ruthenium Oxide Nanotubes
조상현,Lichun Liu,유상훈,장호영,박성호 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.5
We demonstrate that ruthenium oxide (RuO2) nanotubes with controlled dimensions can be synthesized using facile electrochemical means and anodic aluminum oxide (AAO) templates. RuO2 nanotubes were formed using a cyclic voltammetric deposition technique and an aqueous plating solution composed of RuCl3. Linear sweep voltammetry (LSV) was used to determine the effective electrochemical oxidation potential of Ru3+ to RuO2. The length and wall thickness of RuO2 nanotubes can be adjusted by varying the range and cycles of the electrochemical cyclic voltammetric potentials. Thick-walled RuO2 nanotubes were obtained using a wide electrochemical potential range (−0.2~1 V). In contrast, an electrochemical deposition potential range from 0.8 to 1 V produced thin-walled and longer RuO2 nanotubes in an identical number of cycles. The dependence of wall thickness and length of RuO2 nanotubes on the range of cyclic voltammetric electrochemical potentials was attributed to the distinct ionic diffusion times. This significantly improves the ratio of surface area to mass of materials synthesized using AAO templates. Furthermore, this study is directive to the controlled synthesis of other metal oxide nanotubes using a similar strategy.
슬관절 보존형 광범위 절제를 시행한 골육종 환자에서 발생한 국소 재발 - 증례보고 -
조상현,송원석,원호현,전대근,Cho, Sang-Hyun,Song, Won-Seok,Won, Ho-Hyun,Jeon, Dae-Geun 대한근골격종양학회 2008 대한골관절종양학회지 Vol.14 No.1
골육종의 치료율이 높아짐에 따라 장기 추시 결과와 기능적인 결과에 대한 관심이 환자나 의료진 모두에게 중요한 문제가 되어가고 있다. 슬관절 주위의 악성 종양을 절제 후 재건 시 종양인공관절 치환술에 비해 정상적인 슬관절 구조물을 보존하는 사지구제 술식이 가능하다면 좋은 방법으로 생각된다. 그러나 장기적으로 바람직한 기능적 결과를 얻기 위해 절제연을 희생하면 안 될 것으로 생각된다. 저자들은 원위 대퇴골 간부 골육종 환자에서 광범위 이상의 절제연 확보가 가능하다고 판단되어 분절 절제 후 저온 열처리한 자가골을 이용하여 재건하였으나 술 후 44개월만에 국소재발 한 례를 경험하여 문헌 고찰과 함께 보고하는 바이다. As survival rate of patients in osteosarcoma improves, both patients and surgeons are increasingly interested in long-term functional outcome. For resection and reconstruction of tumors on either side of knee joint, if feasible, conservation of normal joint apparatus seems preferable method over use of tumor prosthesis. However, we should not trade off the sound surgical margin with expected functional gain. We report one case of osteosarcoma who was treated by wide, intercalary resection and reconstruction with autogenous pasteurized bone but, showed local recurrence at 44 months postoperatively.
A report of 29 unrecorded bacterial species belonging to the phylum Bacteroidetes in Korea
조상현,윤정훈,김승범,장광엽,조장천,조기성,차창준,성치남,배진우,임완택,전체옥 국립생물자원관 2017 Journal of species research Vol.6 No.2
Within a comprehensive, widescale investigation of indigenous prokaryotic species in Korea, 29 bacterial strains in the phylum Bacteroidetes were isolated from diverse environmental habitats that included soil, plant roots, natural caves, tidal flats, freshwater from lakes, and seawater. Based on their high 16S rRNA gene sequence similarities (>99.1%) and the formation of robust phylogenetic clades with the closest type species, each strain likely belonged to an independent and predefined bacterial species. There are no publications or official reports of the isolation of these 29 species in Korea. Our study provides strong evidence that seven species in three genera in the order Cytophagales, 15 species in 13 genera in the order Flavobacteriales and seven species in five genera in the order Sphingobacteriales, all within the phylum Bacteriodetes, are new reports of bacterial species in Korea. Gram reaction, colony and cell morphology, basic biochemical characteristics, isolation source, and strain IDs are described in the species description section.
조상현 한국치안행정학회 2019 한국치안행정논집 Vol.16 No.3
Numerous policies have been proposed to eradicate the ongoing prostitution in our society. However, prostitution still continues to happen around us. According to the survey on sex trafficking by the Ministry of Gender Equality and Family, 5 out of 10 men experienced sex trafficking and the average number of sex trafficking per person was 8.46 times. Prostitution experience in 2 years was 25.7%. Can prostitution be eradicated? In order to find the answer to this question, this study looked at the process of continuing prostitution around adult males. Interviews were conducted with men who had experience in prostitution, and four of them who had some experience with prostitution were selected as participants in this study. In-depth interviews were conducted more than twice between July and August, and the duration was about 1 to 2 hours per session. The questions about interviews were based on previous research, and the participants were free to talk. The first attempts at prostitution were based on curiosity about sex, the inviting of friends, and the military. There was a somewhat positive impact on the first prostitution, which was investigated as the prostitution continued. In addition, information on sex trafficking is found in the neighboring sex trafficking shops, which are found on online sex trafficking sites. Frequent sex trafficking establishments were not identified and were surveyed as ones that could soothe loneliness and address sexual needs. The perception of women in prostitution was viewed as professional women, but no negative perception was examined. In the recognition of prostitution, all participants in the study recognized that it was illegal, but it was found that no prostitution control or punishment was performed. And prostitution is not absolutely eradicated, and the crackdown on prostitution is expected to open up more shade. On the contrary, it was found that it is desirable to make prostitution legal and manage it at the government level. Based on the results of these studies, the policy of prostitution prevention and prostitution eradication was suggested. 우리사회에서 끊임없이 발생하는 성매매를 근절하고자 수 많은 정책이 제시되고 있다. 하지만 성매매는 우리 주변에서 계속적으로 이루어지고 있다. 여성가족부의 성매매실태조사에 따르면 성매매를 경험한 성인 남성은 10명 중 5명이며 1인당 평균성매매 횟수는 8.46회로 조사되었다. 최근 1년간 성매매 경험은 25.7%로 조사되었다. 과연 성매매는 근절될 수는 없는 것일까? 이러한 질문에 답을 찾고자 본 연구는 성인남성을 중심으로 성매매가 지속화되는 과정을 살펴보았다. 성매매 경험이 있는 20명의 남성을 대상으로 면접을 진행하였으며, 이 중에서 다소 성매매 경험이 높은 4명을 본 연구의 참여자로 선정하였다. 심층면접은 7월에서 8월 사이에 2번 이상 진행하였으며, 소요 시간은 1회당 1시간에서 2시간 가량 소요되었다. 면접에 대한 질문은 선행연구를 토대로 구성되었으며 연구 참여자에게 있어서 자유롭게 이야기 할 수 있도록 하였다. 연구결과 처음으로 성매매를 시도한 것은 성에 대한 호기심과 친구의 권유 그리고 군대를 간다는 연유 등으로 조사되었다. 첫 성매매에 있어서는 다소 긍정적인 영향을 미쳤으며 이는 성매매가 지속화되어 가는 과정으로 조사되었다. 그리고 성매매에 대한 정보는 주변의 성매매 업소가 분포되어 있으며, 온라인의 성매매 사이트에서 접하는 것으로 이 역시 성매매가 지속화 되는 과정으로 조사되었다. 자주 가는 성매매 업소는 따로 정해져 있지는 않았으며 연구 참여자가 외로움을 달래고 성적인 욕구를 해소할 수 있는 업소로 조사되었다. 성매매 여성에 대한 인식은 직업적 여성으로 바라볼 뿐 부정적인 인식은 따로 조사되지 않았다. 성매매에 대한 인식에 있어서는 연구 참여자 모두가 불법이라고 인식을 하였으나, 성매매 단속이나 처벌은 이루어지지 않는다고 조사되었다. 그리고 성매매는 절대적으로 근절되지 않으며 성매매를 단속하게 되면 더 음지에서 영업을 할 것으로 보았다. 오히려 성매매를 합법화로 만들어 정부차원에서 관리를 하는 것이 바람직하다고 조사되었다. 이러한 연구 결과를 토대로 성매매 예방 및 성매매 근절 정책 등을 제시하였다.
적대국가 간 초기단계 신뢰회복에 관한 연구-키프로스의 통일협상과 교류협력을 중심으로-
조상현 미래군사학회 2020 한국군사학논총 Vol.9 No.2
The purpose of this study is to identify implications for the unification of the Korean Peninsula through the Cyprus case. This article explains the process of restoring trust between hostile states. In the early stages, talks are needed to resolve hostility. These talks are conducted by the leaders or dignitaries of the Parties. Exchanges and cooperation continue when hostility is resolved. In this case, the borders are open to each other, and the residents' traffic and economic exchanges are conducted. Cyprus has continued this process for nearly 30 years. The intermediate stage is peaceful coexistence. In this process, both sides are at peace. The final stage is unification. It develops from a confederation to a federal state, if this is brought back to national integration, a completely unified state can be achieved. Cyprus maintains the current exchange and cooperation relationship with the help of the United Nations. The Secretary-General of the United Nations persuaded both sides and the international community to resolve the Cyprus issue. North and South Cypriot leaders also held direct contact and talks. Exchange and cooperation in Cyprus provides implications for the issue of unification on the Korean Peninsula.
예멘 내전의 사적(史的) 재조명과 한반도 통일에 주는 함의
조상현,이동식 육군군사연구소 2011 군사연구 Vol.- No.132
Yemen is one of the poorest nation in the Arabian peninsula.Yemen underwent division and civil war unlike other nations in the Arab region. Yemen's division was the result of the world powers' trying to maintain supremacy during the imperialistic era. The clash between the two sides in the period of division was a proxy war of the two powers during the Cold War.Conflict over system and ideology was intense. Ideology conflict was fought between Islam and communism instead of between democracy and communism. As the world entered a transition period with the collapse of communiststates of eastern Europe and the Soviet Union, the North and SouthYemen were united again.Yemen was able to achieve unification with out interference of neighboring states or external influence. This was because the Yemen iideology conflict was fought over Islam vs. communism not democracy vs. communism which does not involve interests of world powers Nonetheless, imperfect unification of the country became a prelude to a civil war. The Yemen civil war severely deteriorated causing numerous casualties and refugees. However, North Yemen was able to defeat South Yemen and achieve complete unification through superior military forces in the civil war. Also, North Yemen was able to remove their political rivals and threats in the South during the civil war providing a stable basis for united Yemen after the conflict. The unification of Yemen teaches several lessons to Korea. Problem of power distribution after unification, problems of incomplete military integration,economic difference, irrational community and problems of cultural integration are the problems that we should be on alert.