전자통관 단일창구 활용 및 성과에 관한 실증 연구

김창봉(Chang-Bong Kim),이돈현(Don-Hyun Lee) 한국관세학회 2010 관세학회지 Vol.11 No.3

This study is to develop research models suitable for e-Customs Clearance Single Window and empirically analyze them in order to examine and verify factors affecting e-Customs Clearance system in Korea on the basis of previously-verified studies such as Technology Accept Model(TAM), Task-Technology Fit Model(TTF) and managing tool like a Plan-Do-Check-reAct(PDCA) Model. Among many factors, this paper comprehensively analyzes an acceptance factor, which is one of the factors affecting the implementation and performance of e-Customs Clearance Single Window, from the Information Technological context, the Public Administration Task context in the customs clearance office, and the quality management environmental context. The finding from this paper are four factors which affecting on the e-Customs Clearance Single Window. The planing phase's factors affecting on the Do, Check, reAct, use rate and effect. The doing phase's factors don't affecting on the Check, reAct, use rate and effect. The checking phase's factors affecting a little bit on the reAct and effect but don't affecting on use rate. The reActing phase's factors don't affecting on use rate, but affecting on the effect. The use rate of e-Customs Clearance Single Windows affecting on the effect a little bit. So we can say there are the correlation between IT acceptance and performance on the e-Customs Clearance Single Window.

자동차 도아프레임 오목부분의 아연도금법 개발

최순돈,민봉기,양승봉,신현준 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.1

We studied the homogeneous plating on the dented part of door frame by decreasing or increasing the current density, installing air blower, adjusting the length between anode and cathode, using auxiliary anode, developing the new plating bath and etc. When we performed the zinc cynade plating, there was no way to achieve the homogeneous plating layer without using auxiliary anode. However, it wasn't a suitable and efficient method for appling to the real process. After we developed the plating bath that had the uniform current density, we were able to get the homogeneous plating layer of zinc on the dented door frame.

Computer Simulation에 의한 FMS의 生産日程 計劃 硏究

최효돈,남현우,문기주,하정진 동아대학교 공과대학 부설 한국자원개발연구소 1992 硏究報告 Vol.16 No.1

An FMS(Flexible Manufacturing System) consists of a group of computer numerically controlled machines linked by and automated material handling system, and which operates under computer control. FMS's are designed for production of small and medium-sized batchs comprising several different part types with the efficiency of automated mass production and the flexiblity of the job shop. In this research, job scheduling for minimizing APT(average processing time) was studied in FMS with 3 machining centers which are served by a cyclic-unidirectional conveyor while the conveyor speed is set to 1, 2, or 3, respectively. The results of this research could be useful to reduce APT in part manufacturing systems in practice.

超高壓線路의 靜電誘導電壓 低減에 관한 硏究

李鉉敦,韓萬春 연세대학교 산업기술연구소 1982 논문집 Vol.14 No.1

This paper presents the effective method for the reduction of electrostatic induced voltages using shielding wires. Overhead Extra High Voltage(EHV) transmission lines generate an electrostatic field, which imposes additional design consideration in order to avoid excessive induced voltages and the other undesirable effects. A 345 KV EHV transmission line was selected as a model system in order to compute electrostatic induced voltages using electronic computers. The electrostatic induced voltages, after setting up shielding wires,showed more considerable reduction than before.

유기용제 취급근로자들의 요중대사물질과 말초임파구 자매염색분체교환 발현빈도에 관한 조사연구

김돈균,황인경,류철인,이수일,정갑열,이용환,이충렬,현원일,김석봉,전용덕 大韓産業醫學會 1990 대한직업환경의학회지 Vol.2 No.1

저자들은 유기용제 취급여성근로자 90명을 대상으로 1988년 7월부터 1989년 8월까지 말초혈액임파구에서의 자매염색분체교환의 발현빈도를 조사하고 이들의 업종, 근속연수, 요중마뇨산 농도등이 자매염색분체교환의 발현빈도에 미치는 영향을 조사하였으며 그 결과를 요약하면 다음과 같다. 1. 유기용제 취급근로자들의 말초혈액임파구에서의 자매염색분체교환의 발현빈도는 대조군에 비하여 유의하게 증가되었다. 2. 말초혈액임파구에서의 자매염색분체교환의 발현빈도가 가장 높은 업종은 프라스틱제품 제조업이었다. 3. 근속연수가 말초혈액임파구에서의 자매염색분체교환의 발현빈도에 미치는 영향은 현저하지 않았다. 4. 요중마뇨산농도와 말초혈액임파구에서의 자매염색분체교환의 발현빈도간에는 유의한 상관관계가 있었다. In order to know the possibility of utilizing the sister chromatid exchanges as an index which could evaluate the effect of organic solvents on the health in industrial workers, the authors studied the effects of the inductivity of sister chromatid exchanges in peripheral lymphocytes from 90 female workers expoxed to organic solvents and 20 non-exposed female workers. The results obtained were as follows : 1. The frequency of sister chromatid exchanges in peripheral lymphocytes from 90 female workers exposed to organic solvents was significantly increased in comparison with 20 control subject. 2. The frequency of sister chromatid exchanges was significantly increased in the workers who were employed in the manufacture of plastic materials than the other manufactures. 3. There were no significant differences in the frequency of sister chromatid exchanges by carriers of the exposed workers.

미생물 유래 β-glucan 분리 · 정제 및 이를 이용한 오염물질 정화용 복합 미생물제재 개발

서현효,이현돈,김형갑 진주산업대학교 산업과학기술연구소 2007 산업과학기술연구소보 Vol.- No.14

β-glucan occuring mainly in mushrooms and fungi are attractive candidates for numerous industrial application due to their pharmacological activity such as antitumor activity via immunomodulating behavior and excellent rheological properties such as emulsification, viscosity, jellation, etc. Screening of β-glucan producing microorganism was performed by congo red dye binding assay of ethanol-precipitates from each culture filtrate. The β-glucan produced form the selected strains was purified mainly by directly diluting the culture broth with the same volume of water, removal of cells by centrifugation at 4,000×g for 20 mim, and precipitation with 3 volumes of ethanol. The monosaccharide composition was analyzed by either TLC or HPLC afer trifuoroacetic acid hydrolysis. The molecular mass of the β-glucan of HH-71 strain was estimated to be about 4,500,000 dalton on a GFC-HPLC chromatogram. A Bacillus protease coated with β-glucan showed 3-times more increased thermal stability comparing to the uncoated control when stored at 30℃ for 1 week. In a similar manner coating of wastewater (containing chlorinated organic compounds) treatment bacteria with β-glucan resulted in significant increase of thermal stability. Although more detailed experimental data need to be accumulated, these preliminary data clearly suggest that β-glucan is applicable as a coating material to stabilize activity or viability of industrial enzymes and microorganisms for treatment of wastewater. Based on these results, β-glucans obtained from HH-71 and HH-87 strains are currently investigated for coating ablility of microbial consortia for the treatment of wastewater.

Folate 拮抗劑의 合成硏究

高玉鉉,姜馨龍,李敦日,金永洙,白采善,金京洙 조선대학교 약학연구소 1990 藥學硏究誌 Vol.12 No.1

In order to synthesize Methotraxate(MTX) analogues, author synthesized 3-〔〔〔2-(N-Ethyl-N-tosyl-p-aminobenzenecarboxamido)ethyl〕thio〕methyl〕-2-methylimidazo-〔1,2-a〕pyridine(15), 2-(N-Ethyl-N-toyl-p-aminobenzoyl)-5-phenyl-2H-tetrazole(16),2-(N-Ethyl-N-tosyl-p-aminobenzoyl)-5-(nitrobenzyl)-2H-tetrazole(17), 3-〔〔〔2-(N-Ethyl-p-aminobenzenecarboxamido〕ethyl〕thio〕methyl〕-2-methylimidazo〔1,2-a〕pyridine(18), 2-(N-E-thyl-p-aminobenzoyl)-5-phenyl-2H-tetrazole(19), 2-(N-Ethyl-p-aminobenzoyl)-5-(4-nitro-benzyl)-2H-tetrazole(20), 2-Amino-3-cyano-5-〔3-〔〔〔2-(N-ethyl-p-aminobenzenecarboxa-mido)ethyl〕thio〕methyl〕-2-methylimidazo〔1,2-a〕pyridino〕methyl pyrazine(21), 2-Amino-3-cyano-5-〔2-N-ethyl-p-aminobenzol)-5-phenyl-2H-tetrazol-2-yl〕methylpyrazine(22), 3-A-mino-3-cyano-5-〔2-N-ethyl-p-aminobenzol)-5-(4-nitrobenzyl)-2H-tetrazol-2-yl〕methylp-yrazine(23), 2,4-Diamino-6-〔3-〔〔〔2-(N-ethyl-p-aminobenzenecarboxamido)ethyl〕thio〕methyl〕-2-methylimidazo〔1,2-a〕pyridino〕 methylpteridine(24), 2,4-Diamino-6-〔2-(N-ethyl-p-aminobenzoyl)-5-phenyl-2H-tetrazol-2-yl〕methylpteridine(25), and 2,4-Diamino-6-〔2-(N-ethyl-p-aminobenzol)-5-(4-nitrobenzyl)-2H-tetrazol-2-yl〕methylpteridine(26), respectively.

자기-광전이 형식을 유도하는 두 가지 다체사영연산자 방법의 비교

최상돈,이현정,석적영,조상규,강남룡 慶北大擧校 師範大學 科學敎育硏究所 2000 科學敎育硏究誌 Vol.24 No.-

We consider a magneto-optical transition theory based on the many-body projection technique. And we use two kinds of projectors ; projection-isolation operators and projection operators. The second method turns out to be more convenient than the first method.

저혈청 배지에서 인간 전골수세포(HL-60)를 이용한 tPA 생산과 세포사멸기작에 관한 연구

김현구,성기돈,김태호,안주희,함문선,박진서,이현용 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.1

tPA 생산과 세포 사멸의 연구를 하기 위해서 인간 전골수세포가 배양되었다. 연속 관류 배양하에서 최대 tPA 생산량은 324 ng/ml이며 최대 세포 농도는 5.27×10 exp (6) cells/ml였다. Phorbol ester를 넣었을 때 tPA 생산량은 420 ng/ml까지 향상되었다. 형광 현미경으로 관찰했을 때, apoptosis는 세포 배양 초기부터 중반까지 우세했고 빠른 교반 속도에서도 우세했다. 그러나 necrosis는 세포배양 말기와 동결된 세포가 해동 되었을 때 우세했다. HL-60 was cultivated to produce tPA (tissue-type plasminogen activator) and study the mechanism of cell death. Maximum cell density and tPA production were obtained as 5.27×10 exp (6) cells/ml and 324 ng/ml, respectively under perfusion cultivation. tPA production was enhanced to 420 ng/ml in adding 160 nM of phorbol ester. The cells were gradually differentiated to granulocytes rather than proliferation. By Fluorescent microscope, apoptosis was prevailed except the death phase and in high agitation speed, but necrosis was prevailed in thawed cells and during the latter periods of the cultivation. It was also proved that tPA was most produced in apoptosis. To obtain higher tPA productivity, the cells must be maintained in apoptosis, not necrosis phase when the cells were dying.

반복작업으로 유발된 수근관내의 굴곡근 건초염과 수근관 증후군 : 증례 보고 Case Report

김돈규,서경묵,신주연,강시현,송인섭 중앙대학교 의과대학 의과학연구소 2003 中央醫大誌 Vol.28 No.1

A 46 year-old woman who had worked repetitive manual job for 3 years visited our hospital because of aggravated right hand sensory symptom and newly developed limitation of 3, 4, 5th finger extension. In physical examination, moderate swelling of volar aspect of wrist and limitation of finger extension was noticed as well as positive tinnel sign. We confirmed carpal tunnel syndrome after electrodiagnostic studies and associated flexor tenosynovitis of 4th flexor tendon in the carpal tunnel through MRI (magnetic resonance imaging) study. She was successfully treated with conservative program including wrist splint and steroid injection. We also tracked the result of treatment using MRI and electrodiagnositic studies. Analyzing her work procedure, we concluded that repetitive and forceful exertional nature of job impose a high burden on hand and wrist region and it caused her carpal tunnel syndrome.