http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Stand-Alone Cages for Anterior Cervical Fusion: Are There No Problems?
Sang Youp Han,Hyun Woo Kim,Cheol Young Lee,Hong Rye Kim,Dong Ho Park 대한척추신경외과학회 2016 Neurospine Vol.13 No.1
Objective: There are complications in stand-alone cage assisted anterior cervical discectomy and fusion (ACDF), such as cage subsidence and kyphosis. Here we report our clinical result on ACDF, comparing with stand-alone cages and with cervical plate system for degenerative cervical spine diseases. Methods: Patients with degenerative cervical disease who were diagnosed and treated in Konyang University Hospital between January 2004 and December 2014 were included in this study. Patients who had operation in single level ACDF were selected. Patients scored the degree of pain using visual analog scale before and after the surgery. Subsidence was defined as ≥3-mm decrease of the segmental height, and cervical kyphosis was defined as progression of ≥5° at 12 months after postoperative follow-up compared to that measured at the immediate postoperative period. Results: A total of 81 patients were enrolled for this study. Forty-five patients were included in a cervical plate group and the others were in stand-alone cage group. There was no statistical difference in pain score between the 2 groups. Segmental subsidence was observed in 7 patients (15.6%) in plate-assisted cervical fusion group, and 13 patients (36.1%) in stand-alone cage group. Segmental kyphosis was observed in 4 patients (8.9%) in plate-assisted cervical fusion group, and 10 patients (27.8%) in stand-alone cage group. There was statistical difference between the 2 groups. Conclusion: There was no difference in pain between 2 groups. But stand-alone case group showed higher incidence rate than plate-assisted cervical fusion group in segmental subsidence and cervical kyphosis. When designing cervical fusion, more attention should be given selecting the surgical technique.
Electrochemical properties of LiNi1-(x+y)AlxZnyO2 cathode materials synthesized by emulsion method
김복희,Sang-Jae Han,Min-Jeong Jang,안병국,Myoung-Youp Song 한양대학교 세라믹연구소 2007 Journal of Ceramic Processing Research Vol.8 No.3
LiNi1-(x+y)AlxZnyO2 composition (x=0.0-0.10, y=0.0-0.005) powders, in which the Ni3+ has been partially substituted with Al3+ and Zn2+, were synthesized by an emulsion method and their electrochemical properties were investigated. The emulsionderived powder had a porous spherical shape agglomerated from fine particles, whereas the calcined powder had an agglomerated shape with nanosized particles, under 50 nm. The intercalation of Li+ was higher in the LiNi1-(x+y)AlxZnyO2 than in the pure LiNiO2. The first discharge capacity and fading rate for 20 cycles were 161 mAh/g and 8.5% in LiNiO2, 168 mAh/ g and 7.1% in LiNi0.99Al0.01O2, 163 mAh/g and 5.5% in LiNi0.995Zn0.005O2 and 164 mAh/g and 7.4% in LiNi0.992Al0.006Zn0.002O2.
핫엠보싱 및 폴리에틸렌 글라이콜 매개 본딩을 이용한 나노채널의 저비용 신속 제작 공정
한상희(Sang-Hee Han),맹준호(Joon-Ho Maeng),박준홍(Jun-Hong Park),신현준(Hyun-Joon Shin),이상엽(Sang-Youp Lee) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
We demonstrated an extremely easy and cost-effective nanochnnel fabrication method based on hot embossing process and polyethylene glycol (PEG) mediated bonding method. Master mold for hot embossing process was fabricated on silicon wafer using negative electron beam lithography and reactive ion etching process. Nanogroove array were patterned in a small piece of poly(methyl methacrylate) (PMMA) plate using hot embossing process and were covered by bonding with 170um thick microscope coverslip. Before nanogrooves were sealed with coverslip, nanopatterned PMMA plate was coated with monolayer of polyethylene glycol and exposed to oxygen plasma. Hot embossing conditions such as force, temperature, and pressing time were optimized at 0.92N, 125±2°C and 30 min. Using our method, nanochannels of four different dimensions (200(h) × 400(w), 200(h) × 200(w), 100(h) × 100(w), 100(h) × 70(w)) were fabricated and the dimension of each nanochannel was examined using atomic force microscopy. Also PEG mediated bonding showed excellent water tight performance.
이중엽(Joong-Youp Lee),정태규(Tae-Kyu Jung),한상엽(Sang-Yeop Han),김영목(Young-Mog Kim) 한국항공우주연구원 2006 항공우주기술 Vol.5 No.2
본 논문에서는 제어밸브에 대한 유공압적, 기계적, 전기적 부분에 대하여 전반적인 기술 적인 사항 및 설계 기술들을 다루었다. 특히 제어밸브를 이용한 시험으로부터 도출하기 어려운 많은 요소의 동특성을 시스템 모사코드인 AMESim 을 이용하여 예측해보았고, 일반 적인 물리적 동특성도 또한 실제 시험결과와 비교 검토하였다. 또한 제어밸브의 단품 상태에서의 동특성 외에 시스템 연계 상황에서의 특성도 예측하고자 하였고, 이를 근간으로 하 여 발사체 엔진 추진제공급시스템의 제어 관련 분야에 응용하였다. This paper deals with technological and design skills for all pneumatical, hydraulical, mechanical, and electrical parts related to control valve. Especially, a variety of dynamic characteristics, which are not easily extracted from field tests using control valves, are studied by system-simulation code, AMESim. The simulated results are also compared and examined with actual testing results in terms of physical dynamic characteristics. In addition, this paper contains the simulated system characteristics including dynamic characteristics in component level of valve itself. Based on the results, it is applied to control system of propellant feeding system in liquid-propellant engine of satellite launcher.
택시표시등 광고의 공적 가치와 실행에 관한 전문가 인식 연구
심성욱(Shim, Sung-Wook),김동후(Kim, Dong-Hoo),김신엽(Kim, Shin-Youp),김운한(Kim, Woon-Han) 한국OOH광고학회 2021 OOH광고학연구 Vol.18 No.3
본 연구의 목적은 국내 시범사업으로 운영 중인 택시표시등 광고의 가치와 역할을 공적 미디어 관점에서 파악하고 수행방향을 위한 주요 개념들을 수집하기 위한 것이다. 이를 위해 택시광고 관련 사업자와 지자체, 학계 전문가 등 13명을 대상으로 심층면접을 실시하고, 출현된 주제를 근거이론에 따라 분석하였다. 분석 결과는 다음과 같다. 첫째, 택시표시등 광고의 사업 요인과 관련하여, 미디어 속성으로는 디지털과 편재성, 사업자 속성으로는 중소기업, 광고환경 속성으로 도시경관 관련 개념들이 출현하였다. 둘째, 택시표시등 광고사업의 중심현상으로 긍정적 가치 항목은 광고 산업 발전, 소상공인과 자영업자 수익 등이 출현됐으며, 부정적 가치 항목으로는 빛공해 등 안전성과 운영시스템에 관련된 내용이 많았다. 셋째, 공익적 역할과 관련한 맥락적 조건으로는 도시환경에 미치는 요인과 안전성이 언급되었으나, 안전성은 도시 환경과 조화될 수 있는 보완가능한 주제로 인식하는 것으로 나타났다. 중재적 조건으로는 콘텐츠의 공익성과 심미성, 소상공인을 위한 활용 등이 언급되었다. 넷째, 택시표시등 광고 사업성 및 사업 활성화와 관련하여 주로 중소형 광고주들의 사업 의향이 높을 것이라는 의견이 많았으며, 광고 집행에 대한 가이드라인과 정량적인 효과 측정 관련 항목 등도 제시되었다. 광고의 공적 가치는 장기적으로 경제적 가치와 관련된 것으로 인식하였다. This study aims to understand the value and role of ʻtaxi top advertisingʼ in perspective of public media and to collect key themes for implementation. In-depth interviews were conducted with 13 experts including business fields, local government, and academic experts, and the emerged themes were analyzed according to the grounded theory. The results are as follows. First, key themes for business are collected such as media(digital media, ubiquity), business(small and medium-sized businesses), and environment(urban landscape). Second, as a central phenomenon of taxi top advertising business, positive value items such as the development of the advertising industry, small business owners and the self-employed appeared, with negative value items such as safety and operating systems(outdoor lighting). Third, urban environment and safety factors for public interest were mentioned as contextual conditions, but safety items were found to be compatible with urban environments. As mediation conditions, public interest and aesthetics of the content, and utilization for small business owners, etc. were mentioned. Fourth, regarding the business feasibility and activation, small and medium-sized advertisers should have a business priority and guidelines for practical execution were presented. Overall, public value of taxi top advertising was recognized to be related with economic value in the long run.