• 한국콘텐츠학회논문지
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• 제12권3호
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• pp.295-310
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• 2012

본 연구의 목적은 SCM을 도입한 기업들의 정성적, 정량적 성과를 분석하고자 함이다. 본 연구모형의 검증을 위해 SCM을 도입하여 실행한지 1년 이상 되는 기업에 500부의 설문지를 배포하였고, 그 중 유효한 153부가 회수되어 연구에 사용되었다. 본 연구에서는, SCM 성과영향요인들을 도출하여, 이들 간의 상호영향관계 모형화를 통해, SCM 성과에 미치는 영향을 조망하고, SCM 도입으로 인한 기업의 재무비율 차이를 분석하였다. 본 연구결과를 하면 다음과 같다. 변화관리는 정보시스템 품질과 SCM 성과에 유의한 영향을 미치는 것으로 나타났고, 정보시스템 품질 역시, SCM 성과에 유의한 영향을 미치는 것으로 나타났다. 또한, SCM 도입 후 재무비율은 유의한 차이를 나타내었으며, 재고회전율, 투자수익률, 자산수익율은 증가하였고, 매출액 대비 인건비는 감소하였다.

• Earthquakes and Structures
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• 제15권5호
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• pp.499-511
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• 2018

This paper aims to investigate the seismic performance of the prestressed steel strips retrofitted RC beam-column joints. Two series of joint specimens were conducted under compression load and reversed cyclic loading through quasi-static tests. Based on the test results, the seismic behavior of the strengthened joints specimens in terms of the failure modes, hysteresis response, bearing capacity, ductility, stiffness degradation, energy dissipation performance and damage level were focused. Moreover, the effects of the amount of the prestressed steel strips and the axial compression ratio on seismic performance of retrofitted specimens were analyzed. It was shown that the prestressed steel strips retrofitting method could significantly improve the seismic behavior of the RC joint because of the large confinement provided by prestressed steel strips in beam-column joints. The decrease of the spacing and the increase of the layer number of the prestressed steel strips could result in a better seismic performance of the retrofitted joint specimens. Moreover, increasing the axial compression ration could enhance the peak load, stiffness and the energy performance of the joint specimens. Furthermore, by comparison with the specimens reinforced with CFRP sheets, the specimens reinforced with prestressed steel strips was slightly better in seismic performance and cost-saving in material and labor. Therefore, this prestressed steel strips retrofitting method is quite helpful to enhance the seismic behavior of the RC beam-column joints with reducing the cost and engineering time.

• 한국산학기술학회논문지
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• 제15권9호
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• pp.5564-5577
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• 2014

본 연구에서는 Price-Scaling AIDS 모형을 바탕으로 가구별 특성의 차이가 소비지출 구조에 어떠한 영향을 미치는지를 통계청 "가계동향조사" 자료를 이용하여 추정하였다. 추정결과, 서비스 품목들의 소득탄력성은 비서비스 품목들의 소득탄력성에 비해 상대적으로 큰 것으로 나타나 향후 가구소득이 늘어날 경우 서비스 품목들에 대한 더 큰 수요 증가가 예상된다. 또한 품목별 가계의 소비지출행태는 연령별, 소득수준별로 상이한 모습을 띠고 있는 것으로 나타났다. 특히, 비서비스 품목에 대한 지출비중이 높은 전통적인 가계지출구조에서 보건, 교육, 통신 등과 같은 서비스품목에 대한 지출비중이 높은 구조로의 전환이 촉진되고 있음이 확인되었다. 이와 같이 서비스품목에 대한 수요 증가로 인한 가계소비지출 구조의 변화는 관련 서비스 시장의 확대와 더불어 서비스 산업의 성장 잠재력을 더욱 확대시키는 방향으로 작용할 수 있다. 따라서 이들 분야에 대한 잠재수요 및 성장가능성에 대한 정확한 파악과 더불어 해당 서비스 시장의 형성 및 확대와 관련한 공급측의 적절한 대응이 요구된다.

• Journal of Nutrition and Health
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• 제36권5호
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• pp.528-535
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• 2003

The purposes of this study were: 1) to investigate the operational and financial characteristics of contract-managed high school food services in Seoul, 2) to analyze the financial performance of high school food services 3) to develop guidelines for meal pricing and facilities investment costs. From Oct to Nov 2001, questionnaires were mailed to 249 high schools that were managed by contract food service companies. A 40.2％ response rate was recorded. The results of this study were as follows: 1. Student enrollment in high schools run by contract-managed food services was 1,518, with a 68.5％ participation rate in the school lunch program. The average meal price was 2,141 won. 2. Based on the income statement analysis, average total sales were 410,440,504 won and average net profit was 16,098,558 won. 3. The optimum food cost per meal was 1,200-1,300 won per meal, calculating using the methods of conversion factor, RDA (Recommended Daily Allowance), and nutrient exchange unit. 4. Guidelines for meal pricing were developed using the modified actual pricing method based on facilities investment cost, number of meals and food cost. The ratio of labor cost, general management expenses and ordinary profit were adopted from the schools with liability. The food cost, depreciation and interest cost were calculated based on unit meal. 5. The guideline for facilities investment was developed based on the number of meals, meal price and food cost. The guideline included the maximum facilities investment cost paid by the contract food service management company. (Korean J Nutrition 36(5): 528∼535, 2003)

• 노동경제논집
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• 제39권4호
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• pp.31-56
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• 2016

본 논문은 최저임금의 사업체 내 임금압축 효과를 다룬 것이다. 분석 결과 사업체 내 최저임금 비중의 증가는 사업체 내 임금분포를 압축시키는 것으로 나타났다. 또한, 최저임금 비중이 큰 사업체일수록 사업체 평균임금이 낮아지는데 이때 고임금 그룹의 하락폭이 저임금 그룹보다 더 크게 나타나며, 저임금 대비 고임금 근로자의 상대임금도 최저임금 비중이 큰 사업체일수록 작아지는 것을 확인할 수 있었다. 본 논문은 다음과 같은 것을 시사한다. 최저임금 인상은 직접적으로는 저임금 근로자의 임금을 상승시키며, 간접적으로는 고임금 근로자의 임금을 하락시키거나 상승폭을 둔화시켜 결과적으로 임금분포를 압축시킨다. 따라서 정책적으로 최저임금의 인상은 임금 불평등도를 낮추는 효과를 얻을 수 있을 것으로 기대된다.

• Computers and Concrete
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• 제3권1호
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• pp.1-15
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• 2006

The seismic safety of reinforced concrete containment building can be evaluated by probabilistic analysis considering randomness of earthquake, which is more rational than deterministic analysis. In the safety assessment of earthquake-resistant structures by the deterministic theory, it is not easy to consider the effects of random variables but the reliability theory and random vibration theory are useful to assess the seismic safety with considering random effects. The reliability assessment of reinforced concrete containment building subjected to earthquake load includes the structural analysis considering random variables such as load, resistance and analysis method, the definition of limit states and the reliability analysis. The reliability analysis procedure requires much time and labor and also needs to get the high confidence in results. In this study, random vibration analysis of containment building is performed with random variables as earthquake load, concrete compressive strength, modal damping ratio. The seismic responses of critical elements of structure are approximated at the most probable failure point by the response surface method. The response surface method helps to figure out the quantitative characteristics of structural response variability. And the limit state is defined as the failure surface of concrete under multi-axial stress, finally the limit state probability of failure can be obtained simply by first-order second moment method. The reliability analysis for the multiaxial strength limit state and the uniaxial strength limit state is performed and the results are compared with each other. This study concludes that the multiaxial failure criterion is a likely limit state to predict concrete failure strength under combined state of stresses and the reliability analysis results are compatible with the fact that the maximum compressive strength of concrete under biaxial compression state increases.

• 한국강구조학회 논문집
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• 제28권6호
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• pp.403-414
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• 2016

최근 강재가격 하락과 인건비 상승으로 강구조 및 합성구조의 연구가 활발히 진행되고 있다. 이에 본 연구에서는 보 춤이 큰 고성능 하이브리드 합성보에 대해 10개의 실험체를 제작하여 휨성능을 평가하였다. 휨 실험 결과 공칭하중에 대한 최대하중의 비($P_u/P_n$)는 평균 1.19배로 안정적인 내력을 확보하였으며, 변형능력(${\delta}_{0.8P_u}/{\delta}_y$)은 약 3.9~4.5배의 범위로 확인되었다. 또한 하이브리드 합성보의 내력평가는 현행 건축구조기준(KBC 2009)을 적용하여 평가하는 것이 적절한 것으로 판단된다.

• 한국산업보건학회지
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• 제21권4호
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• pp.227-235
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• 2011

The objective of this study was to analyze 157 processes of 145 industries that exceeded Korean Occupational Exposure Limits (KOEL) for carcinogen during the 11 year period from 1999 to 2009. The data included number of industry and workers exposed, type of carcinogen and their exceeded ratio, type and size of industry in each year. These data were collected by 46 regional employment & labor offices in Korea using work environment monitoring reports. The result showed that, in each year, about 10 industries exceed their carcinogen exposure limit. The most common carcinogen exceeding KOEL were found to be formaldehyde, benzene, ethylene oxide and chromium VI. The carcinogen with the highest level of over-exposure were in the order of formaldehyde, benzene, ethylene oxide and asbestos. Fabricated metal product manufacturing industry were found to be most vulnerable against carcinogen with 11.1% of them exceeding carcinogen KOEL followed by electronic components manufacturing industry (8.3%), chemical products manufacturing industry (6.3%), and electrical equipments manufacturing industry (4.9%). The industry employing less than 50 workers had the highest percentage of exceeding carcinogen KOEL with 52.8%. The result also showed that strengthening KOEL for benzene and asbestos helped reduce the level of carcinogen over-exposure. Based on these results, strengthening the KOEL or new regulation turned out to help reduce the carcinogen over-exposure level. Benzene, ethylene oxide and chromium VI were the most frequently over-exposed carcinogen with the highest level. Therefore, these chemicals need to be regulated with a highest priority to improve the workplace environment. The results also show that the small-sized industries employing less than 50 workers was the most vulnerable against carcinogen exposures. Therefore, more government support are needed for these small-sized industries to help them to improve their workplace environment.

• 보건교육건강증진학회지
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• 제7권1호
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• pp.54-63
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• 1990

This study aims to find out the prevalence of smoking, and to analyze the effect of smoking for health status, and then to emphasize the necessity of stop smoking. The data used in this study are obtained from periodic health care programe at Health Care Center in a suburban hospital, and selected 435 males who have occupation. The independent varibles chosen for the analysis are general charactersitic variables and smoking habit. The dependent variables are designed to cover the health status of individual cases, and include blood pressure, blood cholesterol level with HDL-cholesterol and blood triglyceride level, recent symptoms and recently being managed diseases. The result of this study are summarized as follows. 1) Percentage of smoker by the age groups is highest in 4th decade, being 71.1%. The second and third ranks are 6th and 7th decades, being 53.5% and 44.4%, respectively. 2) In the view of socio-economic levels, smoking rate is higher in the groups who live at rural area and whoes occupation is labor or merchant. Smoking rate is significantly higher in the heavy drinking group. 3) Among the atherosclerotic risk factors, which include hypertension, HDL-cholesterol by total cholesterol ratio lower than 0.2 and triglyceride level higher than 200gm/dl, hypertension was not statistically associated with smoking, but others revealed statistically high association with smoking. 4) The groups who have the symptoms of severe fatigue, gastrointestinal symptoms, pulmonary symptoms, palpitation and chest tightness havepositive association with smoking. 5) The groups who have hypertension with cardiovascular diseases and gastrointestinal diseases showed highly significant association with non-smoking. 6) In relation of the smoking habit to the atherosclerotic risk factor index, smokers have more atherosclerotic risk factors, but that is not statistically significant. 7) In relation of the smoking habit to the recent symptom index, smokers have more symptoms than non-smokers with statistical significance. In conclusion, smokers have worse health status than non-smokers especially in the atherosclerotic risk factors such as hypertension or abnormal blood lipid status and have more symptoms such as severe fatigue, gastrointestinal symptoms, pulmonary symptoms, palpitation and chest tightness. And the campaingn against smoking should direct for the male in 4th decade because they have highest smoking rate.

• 한국인구학
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• 제30권3호
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• pp.83-105
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• 2007

본 논문은 통계청의 <2004년 생활시간조사>를 활용하여 사회자본의 현황을 살펴보았다. 생활 시간 조사에서 사회 자본은 ‘참여 및 봉사활동’이 해당되는데, 이 중 협의의 사회 자본에 해당하는 자원봉사활동의 참가 및 참가시간 결정요인을 분석하였다. 분석 결과, 자원봉사활동의 참가 결정에는 연령, 가구주 여부, 혼인상태, 취학 전 아동 유무, 성, 평소 육체적 피곤정도를 나타내는 인적 변수와 소득, 학력, 취업여부와 종사상지위, 지역, 요일 등과 같은 사회경제변수의 추정 계수가 통계적으로 유의미하였다. 자원봉사에 참여한 시간에 영향을 미치는 변수 중에는 연령, 혼인상태, 맞벌이 여부, 성별 소득, 취업 유무 및 종사상 지위, 주택의 입주유형 등이 유의미하였다. 마지막으로 협의의 사회 자본으로서 <2004년 임금구조 기본통계조사>를 이용한 한국자원 봉사활동의 경제적 가치는 연간총액 1조 8,325억 원으로 측정되었으며, 대 GDP 비율은 약 2%p.로 주요선진국의 평균 6%에 비해 상당히 낮은 수준임을 발견하였다.