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강영문 여수대학교 산업기술지역개발연구소 2001 産業基術硏究所 論文集 Vol.10 No.-
The objective of this paper is twofold. One is the study on the transition of commercial environments in China. The other is to suggest the way to promote industrial cooperation between Korea and China.
강영문 여수대학교 산업기술지역개발연구소 2000 産業基術硏究所 論文集 Vol.9 No.-
The korean retaiI sector is unable to keep up with the advances made in the country's manufacturing industry. Toimprove this, some radical changes have been undertaken recently in a cooperated effort made by both firm and thegovemment to modernize the retail sector. Buoyed by recovering consumer confidence nowadays, the expectations for and potential of the Korean retaiI sector in the 21C has been significantly heightened. Expectations call for boosted of produltivity, output. Such results will be strengthened by the globalization process, which is shaping the korean retail sector into a more efficient industry.
DMPT(dimethy1-β-propiothetin)첨가 급이가 참돔 근육의 화학성분에 미치는 영향
강동수,배태진,최옥수 여수대학교 산업기술지역개발연구소 2000 産業基術硏究所 論文集 Vol.9 No.-
A eight weeks feeding experiment was conducted to investigate the effects of different dietary dimethyl-β-propiothetin(DMPT) levels on growth and body composition in red sea bream(Pagrus major). Body weight gain, feel efficiency and feed intake were significantly increased with dietary DMPT level. After eight weeks of feeding trial, moisture content decreased with supplemented DMPT level, while crude protein and lipid contents increased with dietary DMPT level. Amino acid composition of muscle in fish fed the diets supplemented DMPT was not different to that of control group. Fatty acid contents of muscle in fish increased with dietary DMPT level.
Numerical Study of Impinging Diesel Sprays on a Wall
Yang, Hei-Cheon 여수대학교 산업기술지역개발연구소 2001 産業基術硏究所 論文集 Vol.10 No.-
본 연구에서는 액막 형성을 고려한 새로운 분무 충돌모델의 타당성을 검증하고, 연료의 비등온도 이하의 조건을 갖는 벽면에 충돌하는 비 증발분무의 특성을 수치적으로 해석하였다. 벽면 분무의 전체적인 구조에 대한 해석에서는 비교되는 다른 모델들에 비해서 향상된 예측 결과를 얻을 수 있었으며, 분무의 내부 구조에 대한 해석에서는 다른 모델들과는 달리 정체영역에서도 반사되는 액적들이 존재하는 결과를 얻을 수 있었다.
김정엽,박경조 여수대학교 산업기술지역개발연구소 2000 産業基術硏究所 論文集 Vol.9 No.-
In this study, durability of the rack and pinion power steering system was evaluated. For this work, rig tests for QC spec. and simulation tests were performed for road load date measured proving ground. For some parts of the tested steering system, change of the dimension were measured and performance test were performed. From this, the items for durability evaluation of the steering system were determined.
전압조절이 가능한 단상변압기 응용을 위한 PWM Buck-Boost AC/AC 컨버터
최남섭,강정식 여수대학교 산업기술지역개발연구소 2001 産業基術硏究所 論文集 Vol.10 No.-
Computers and automated manufacturing processes are very susceptible to voltage sags, surges and outages. The need for greater power reliability makes the end-users to use the uninterrupted power supply and other electronic power conditioning means to maintain the stable voltage. In this paper, a single-phase buck-boost ac-ac converter for single-phase transformer with voltage regulation for Custom Power Application is presented. The presented converter uses IGBT's as switching module and maintains the stable voltage through PWM technology in spite of the input voltage sags, surges and load rejections. In this paper, the operation characteristics and schematics of the power converter are illustrated using PSPICE simulations.
최상원,오남희,방정환,정관용,김은영,류비탈리 여수대학교 산업기술지역개발연구소 2000 産業基術硏究所 論文集 Vol.9 No.-
Amino acid mixtures containing waste protein resolved by sodium hydroxide hydorolyzing method were obtained. The composition and concentration of amino acid mixtures were analyzed by high performance liquid chromatography. The disinfectant with tetraminecopper(Ⅱ) sulfate monohydratercu[Cu(NH3)4SO4ㆍH2O] from amino acid mixtures was synthesized. Complexes of synthesized disinfectant(amino acid-copper(Ⅱ) complexes) received by using UV- spectrophotometer were confirmed. Sterilizing power on Escherichia coli, Staphycoccus aureus, Xanthomonas and campestris, Pseudomonas solanacearum was tested and compared to synthesized disinfectant and EG105, used generally. Also, we carried out the experiment of sterilizing ability for abseence of metal ions (Ca2+, PO43-, Mg2+). The sterilizing effect of synthesized disinfectant was better than other being not affected by metal ions (Ca2+, PO43-, Mg2+).
On the hyperbolic topology on Reinhardt pseudoconvex Domains C²
Oh, Chun-young,Jin, Hong-seong 여수대학교 산업기술지역개발연구소 2000 産業基術硏究所 論文集 Vol.9 No.-
일반적으로 C¹ 상의 영역(domain)G에서는 Carath eodory hyperbolic 거리 CG에의 유도된 위상 topCG와 유클리디안 위상 topG은 같다. Cn의 n≥3에서는 일반적인 영역에서는 topCG ≠ topG 인 영역 G가 존재한다. 하지만 n=2인 경우 위 등식을 만족시키는 어떤 영역이 존재하는지는 알려져 있지 않았다. 우리는 위 등식이 성립하는 라인하르트 의사볼록 영역이 존재함을 밝히고자 한다.
저주파 스퍼터링으로 성장한 Li₃.₃PO₃._9N_0.₁_7 박막의 특성
안명환,정호용,강성준 여수대학교 산업기술지역개발연구소 2001 産業基術硏究所 論文集 Vol.10 No.-
The electrolyte solid films for the rechargeable Li-ion thin film batteries were deposited by RF sputtering method using a Li3PO4 sputter target and increasing RF power under a flowing N2O or N2 atmosphere. The chemical bond structures were spectroscopically analyzed by using FTIR (fouler transform infrared spectroscopy) and XPS (x-ray photoelectron spectroscopy). The FTIR absorption spectra of the films exhibited two principal stretching bands, one associated with the PO3 stretching mode and the other with the P-O-P stretch mode. The XPS N1s peaks located at 398.2∼404.5 eV indicated that the N bond structure in the film consisted of chemical bonds, such as nitride bonded to P and/or Li atoms. To be influenced by the nitrogen, the ionic conductivity of the films deposited Using N2 has to be 10 orders of magnitude higher than that of the films deposited Using N2O.