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일부 법인 택시 노동자의 교통사고와 볼안전운전행동에 미치는 인적요인
윤간우,이상윤,임상혁 대한산업의학회 2006 대한직업환경의학회지 Vol.18 No.4
목적: 본 연구는 택시 업종을 대상으로 택시노동자의 다양한 인적특성들이 불안전운전행동을 매개로 교통사고와 어떠한 관련성이 있는지 살펴보고자 한다. 방법: 총 6개 택시사업장에 335명의 택시노동자를 대상으로 연구를 수행하였다. 자기기입식 설문조사 방법으로 지난 1년간 교통사고 횟수와 운전 중 불안전한 행동수준을 파악하였다. 이에 영향을 미칠 것으로 예상되는 개별 노동자의 인적 특성을 수집하여 요인분석을 통해 직무요인, 정신건강요인, 연령요인, 건강습관요인, 수면요인으로 범주화 하였고 위계적 다중회귀분석을 통해 이들 요인들이 불안전운전행동을 매개로 교통사고 횟수에 미치는 영향을 살펴보았다. 결과: 위계적 다중회귀분석 결과, 직무요인(β: 0.122), 수면요인(β: 0.114), 그리고 불안전운전행동(β: 0.018)은 교통사고 횟수에 직접적인 영향을 미치는 요인으로 나타났다. 불안전운전행동을 통해 교통사고 횟수에 간접적인 영향을 미치는 요인은 직무요인(β: 1.319), 정신건강요인(β: 6.429), 건강습관요인(β: 1.177)이었다. 결론: 본 연구 결과 택시 교통사고는 택시노동자의 일반적 특성, 정신건강상태, 직업적 특성이 불안전운전행동을 매개로 직·간접적인 영향을 미치고 있었으며, 효과적인 택시 교통사고 예방을 위해서는 이들 인적 요인에 대한 적절한 대책이 필요할 것이다. Objective: This study investigated the driving habits of taxi drivers, in order to examine the characteristics of human factors causing traffic accidents and unsafe driving behavior and to determine any relevancy among them. Method: Taxi drivers (N=335) answered a questionnaire investigating various measures of human factors, unsafe driving behaviors, and number of traffic accident experiences in the previous year. In factor analysis, the characteristics of human factors were classified into 5 common factors: job, mental health, age, health habit and sleep factor. A contextual mediated model was proposed to distinguish the distal (5 common factors) and proximal (unsafe driving behaviors) factors in predicting traffic accident involvement by hierarchical multiple regression. Result: In hierarchical multiple regression, job factor(β: 0.122), sleep factor (β: 0.114) and unsafe driving behaviors (β: 0.018) yielded a direct effect on the rate of traffic accidents. Mental health factor β: 6.429), job factor (β: 1.319) and health habit factor(β: 1.177) yielded a indirect effect on the rate of traffic accidents by unsafe driving behaviors. Conclusion: Various human factors co-related by the unique characteristics that exist in the taxi service industry have significant effects on the rate of traffic accidents mediated by unsafe driving behaviors. Therefore a proper countermeasure against these factors should be established in order to effectively reduce the rate of taxi accidents.
윤상혁,조대철 순천향대학교 부설 산업기술연구소 2001 순천향 산업기술연구소논문집 Vol.7 No.2
We investigated a contiouous, chemical soil flushing method using β-cyclodextrin solution in a glass bed column, packed with well-prepared sand. The effluent solution was alalyzed via fluorescence spectrometric method, We found that cumulative HOC(hydrophobic organic compound) concentrations in the effluent, increased with flow rates of the surfactant solution as well as time (or number of washes). Also, phenanthrene was more effectively removed out of the bed than naphthalene probably due to its higher hydropholbicity. The HOC removal curves were found to be S-shaped as was usually found in elsewhere.
정밀주조 다이캐스팅을 이용한 자동차 레귤레이터 하우징 성형해석에 관한 연구
성백섭,김미애,차용훈,김정대,김덕중,이연신 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-
The casting defects that are caused by molten metal were cold shut formation, entrapment of air, gas, and inclusion. But the control of casting defects has been based on the experience of the foundry engineers. In this thesis, the computer simulation analyzed the flow of molten metal. The quantitative analyses which proposed the effective mold design was executed Flow patterns of 0.1-0.16m/s molten metal in 15mm thin plate casting were investigated in order to optimize die-casting process. As increasing ingate velocity in thin plate casting, cold shot was decreased. The parameters of runner shape that affected on the optimized conditions that was calculated with simple equation were investigated. These die casting process control techniques of automobile regulator housing parts have achieved good agreement with the experimental data of tensile strength, hardness test, and material structure photographies satisfactory results.
수중환경 변수의 변화에 따른 능동소나 표적검출 성능분석에 관한 연구
윤대희,이충용,성하종,박성범,정형성 연세대학교 산업기술연구소 1997 논문집 Vol.29 No.2
In this paper, the performance of active sonar system is analyzed under various underwater acoustic environments using the multipath eigenray model in shallow water. In addition, an approximated shallow-water propagation model is proposed for the active sonar based on MacPherson and Daintith's model and corresponding equations comprising active sonar parameters are derived. To analyze the sonar performance according to the changes of various sonar parameters, a large number of measurements and results in ocean acoustics and digital signal processing are combined. The proposed model is compared with the multi-path eigenray model in terms of the echo level passed through the beamformer, the input SNR of the detector and the detection probability.
소뇌에 발생한 Nocardiosis : 증례 보고 Case Report
성연상,김상진,박순필,강재규,도종웅 대한신경외과학회 1989 Journal of Korean neurosurgical society Vol.18 No.6
The authors report a extemely rare case of primary cerebellar nocardial abscess. Cerebral nocardiosis is rare disease and often fatal, and often fatal, and commonly spreaded from nocardiosis of lung or skin. Total excision of abscess and medication with sulfonamide is the treatment of choice. The patient was treated by continuous external dirainage with intermittent irrigation of abscess cavity by sulfonamide and given with sulfonamide for 10 months.
윤현주,변상용,김장형,변영철 제주대학교 공과대학 첨단기술연구소 2004 尖端技術硏究所論文集 Vol.15 No.2
In this paper, we propose a method generating of instance ontology from web pages for the lodge. First, we analyze non-structured web documents and generate information extraction rules in order to extract specific informations from web sources. And we extract the informations from various web pages related to lodge using generated rules. And then ontology instances are automatically generated through adding OWL semantic information to the extracted informations. Our method is able to cut down on time and cost than a method which generates various ontology instances manually. Also agents can search the information corresponding to semantically what the user needs in the various web pages using numerous vocabulary having same meaning and provide good quality of informations to user.
척수압박으로 발현된 급성 골수성 백혈병에 동반된 과립구성 육종 1 례
윤상준,김영곤,김희종,박유환,정춘해,김양수,김태균,박영진,전호종 조선대학교 부설 의학연구소 2000 The Medical Journal of Chosun University Vol.25 No.1
저자들은 척수압박으로 하지마비를 보인 환자에서 수술 후에 급성 백혈병에 동반된 과립구성 육종으로 진단된 환자 1례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Granulocytic sarcoma(GS) is an uncommon tumor composed of immature cells of the granulocytic series. Most case of GS occur in the course of acute leukemia and the blast crisis of chronic leukemia, Rarely, however, it may present before leukemia becomes clinically apparent. It may also occur in patients with myeloproliferative disoders. GS has been reported that it occurs in 3% to 9% of patients with acute myelogenous leukemia(AML) and the incidence of GS is reported to be higher in patients with t(8;21). GS occurs relatively commonly in africa and has been reported to affect 10-25% of black children presenting with AML. This is very rare case of granulocytic sarcoma with AML(FAB M5) presented with spinal cord compression which was supported by decompression laminectomy.