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KyoungJu Kim,Seung Do Ahn,Eun Kyung Choi,Hyesook Chang,Jong Hoon Kim 대한암학회 2002 Cancer Research and Treatment Vol.34 No.1
Purpose: In order to evaluate the response to radiationtherapy and to analyze the patterns of failure, survivaland complications, we performed a retrospective analysisof patients with conjunctival lymphoma.Materials and Methods: From November 1991 to March1999, 11 patients were diagnosed as conjunctival lymphomaat Asan Medical Center. Five patients had bilateralinvolvements, and a total of 16 eyes received radiationtherapy. Using 6 to 9 MeV electrons or 4 MV photonbeams, all patients were treated with a single anteriorfield to total doses ranging from 30 Gy to 45 Gy deliveredin 10 to 25 fractions. The median follow up period was57 Months.Results: All patients achieved a complete responsewith radiation therapy. Two of 16 eyes that were treated(12.5%) developed local recurrence after radiation therapy,however they were salvaged with 30 Gy of reirradiation.The five-year local control was 88.9%. One out of11 patients (9.9%) developed lung metastasis and receivedchest irradiation. At the last follow up, one had died ofpneumonia and 10 patients were alive without diseaseevidence. The five-year overall survival rate was 77.8%and 5-year disease free survival was 77.8%. Cataract anddry eye occurred in one patient (9.9%) respectively.Conclusion: Radiation therapy is a very effective andsafe treatment modality for conjunctival lymphoma. Thelocal control rate of radiotherapy was excellent andcomplications were acceptable. Radiation therapy is alsoan effective treatment modality for recurrent conjunctivallymphoma. It generally requires more than three monthsto achieve complete response following radiation therapy,thus we recommend evaluating the response to radiationtherapy at three months after completion of treatment.(Cancer Res Treat. 2002;34:58-61)
Kim, KyoungJu,Yu, Woong-Ryeol,Youk, Ji Ho,Lee, Jinyong AmericanChemical Society 2012 ACS APPLIED MATERIALS & INTERFACES Vol.4 No.4
<P>This study reports on the main cause of the reduced tensile strength of carbon fibers (CFs) by investigating the microstructural changes in the CFs that are undergoing mainly two processes: catalyst nanopartide formation and chemical vapor deposition (CVD). Interestingly, the two processes oppositely influenced the tensile strength of the CFs: the former negatively and the latter positively. The catalysts coating and nanoparticle formation degraded the CF surface by inducing amorphous carbons and severing graphitic layers, while those defects were healed by both the injected carbons and interfaced CNTs during the CVD process. The revealed degradation and healing mechanisms can serve as a fundamental engineering basis for exploring optimized processes in the manufacturing of hierarchical reinforcements without sacrificing the tensile strength of the substrate CFs.</P>
Global 바이오 연료 Trend와 혼합비율에 따른 차량에서의 영향
전경주(Kyoungju Jeon),용승열(Seungryoul Yong),이정근(Jungkeun Rhee) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
In this study we are understand for the global fuel trend and identify components of typical bio-fuels and estimate both fuel properties and impacts on vehicles. For this study, also an experimental investigation was conducted to analyze the effects of diesel fuel dilution ratio, fuel vapor characteristics and carbon deposit quantities on intake valve seat in 4 cylinder gasoline engine. In this paper, the study for other fuel properties such as the mixed fuel with methanol and DME, it was not conducted but we will studies of the fuel properties and impacts on vehicle in the future.
전경주(Kyoungju Jeon),김승기(Soong Kee Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
In order to cope with more stringent emission regulation and durability requirement, it is necessary to reduce engine oil consumption, to extend engine oil life, and to enhance reliability of engine durability. The composition analysis of engine lubricants is one of the essential methods for these purposes in the automotive companies. A monitoring procedure of engine lubricants is suggested in this paper by the literature survey and experiences. It includes the analysis equipments, sampling method, analysis method, and cause analysis with examples.
국제 표준의 한국산업표준(KS) 부합화를 위한 용어의 표준화: 정유(Essential oils)1 )
김경주(Kyoungju Kim),김용휘(Augustine Yonghwi Kim) 표준인증안전학회 2013 표준인증안전학회지 Vol.3 No.1
For the development of the Korean flavor and fragrance industry, the Korean Agency for Technology and Standards (KATS) has been establishing the national standards (KS), for securing the safety of essential oils and the standardization of the related products. Due to the production and supply of essential oils limited mostly in the foreign countries, KATS has adapted the international standards (ISO) in creating and managing the KS based on the Technical Barrier to Trade (TBT) agreement of the World Trade Organization (WTO). As the technical terms related to essential oils are mostly foreign words, their equivalent Korean words within the KS can be complicating, and thus there is a need to rearrange them according to a set guidelines. 70% of the technical terms within KS are in Chinese characters, and there are confusion from: 1) spelling mistakes in Korean 2) not applying the Korean writing system on foreign languages, 3) variations in expressing foreign words, 4) using different technical terms from several regulatory agents on essential oils, and 5) lack of consistency due to incorrect understanding of the native language. Therefore, there is a strong need for the standardization of words in KS. For the current study, the following guidelines were set for writing the technical terms in establishment and revision of KS on essential oils: 1) follow the writing system on English according to the Korean unified spelling system of The National Institute of Korean Language, 2) select standard words based on the usability and the degree of understanding of the technical terms in industry and academics, and 3) carry out a compared analysis of the terms regarding the essential oils in the related field of study such as food and cosmetics.
LPG 엔진오일 열화도 모니터링을 통한 엔진마모도 연구
전경주(Kyoungju Jeon),이정근(Jungkeun Rhee),용승열(Seungryoul Yong),박민희(Minhee Park) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In order to cope with more stringent emission regulation and durability requirement, it is necessary to reduce engine oil consumption, to extend oil life and to enhance reliability of engine durability. The composition analysis of engine lubricants is one of the essential methods for these purposes in the automotive companies. This paper describes the analysis method and understanding for engine wear ratio trough oil sample analysis test results and the test uses two LPGi 2.0 liter engine. Also, the test items are performed which element, viscosity and soot content by TGA for oil condition monitoring.
이산화염소 처리가 저장 중 양송이버섯(Agaricus bisporus Sing)의 품질 및 미생물학적 변화에 미치는 영향
구경주(Kyoungju Ku),마유현(Yuhyun Ma),신희영(Heeyoung Shin),이승환(Seunghwan Lee),박재현(Jaehyun Park),김란희(Lanhee Kim),송경빈(Kyung Bin Song) 한국식품영양과학회 2006 한국식품영양과학회지 Vol.35 No.7
양송이버섯을 5, 10, 50 ppm 이산화염소 용액 처리하여 실온과 4℃ 각 저장기간 중 중량변화, polyphenol oxidase 활성, 미생물에 대한 살균효과를 측정하였다. 중량감모율의 경우 저장기간이 경과할수록, 이산화염소 처리농도가 증가함에 따라 대조구에 비하여 중량감모율이 감소하였다. Polyphenol oxidase 활성은 실온의 경우 이산화염소 처리에 의해 저장 2일까지 일시적으로 증가하다 다시 감소하였는데, 4℃의 경우 이산화염소의 농도가 증가할수록 polyphenol oxidase 활성이 감소하는 것을 확인할 수 있었다. 호기성균수는 이산화염소 처리농도에 따른 큰 차이는 없었으나 4℃의 경우 10일째 대조구는 3.72×10? CFU/g, 50 ppm의 경우 1.66 ×10? CFU/g으로 차이를 보였다. 효모 및 곰팡이의 경우, 이산화염소 처리농도가 증가할수록 대조구에 비해 효모 및 곰팡이수가 감소하는 것을 확인할 수 있었다. 따라서 이산화염소 처리는 양송이버섯의 미생물학적 안전성을 증가시키며, 품질을 유지함으로써 shelf life 증대에 도움을 준다고 판단된다. Effects of chlorine dioxide (ClO₂) on weight loss, polyphenol oxidase activity, and microbial change of fresh mushrooms (Agricus bisporus Sing) were investigated. Mushrooms were treated with 5, 10, and 50 ppm of ClO₂ solution. Mushrooms were stored at room temperature and 4℃. Weight loss for ClO₂ treated mushrooms was smaller than that of the control group. Polyphenol oxidase activity of the ClO₂-treated samples stored at room temperature increased until day 2 of storage and then decreased, and the activity of the samples stored at 4℃ decreased with increase of ClO₂ concentration. Mushrooms treated with ClO₂ solution had lower aerobic bacteria, yeast and mold counts than the control during storage. Aerobic bacterial counts for 50 ppm of ClO₂ treatment at 4℃ increased from 1.62×10<SUP>2</SUP> CFU/g to 1.66×10? CFU/g at day 10 of storage, while control groups were from 1.00×10<SUP>3</SUP> CFU/g to 3.72×10? CFU/g. These results indicate that ClO₂ treatment could be useful in improving the quality and microbial safety of mushrooms.