• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 1996년도 추계학술대회논문집; 한국과학기술회관, 8 Nov. 1996
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• pp.217-223
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• 1996

A structure's vibration characteristic is determined by modal property of the system. Through proper vibration analysis or experiments, the structure can be modified to reduce of vibration and noise. This paper is concerned with the natural frequency and modal loss factor of sandwich plates with viscoelastic core. The effects of shear and normal strain in the viscoelastic layer are investigated on modal properties, natural frequency and modal loss factor, by changing geometry parameter and viscoelastic material property of sandwich plates. The errors of modal parameters resulting from neglecting the extension or compression in the core material for simply supported(S-S-S-S) case are compared with those for clamped(C-C-C-C) boundary condition. Finite difference method(FDM) is utilized as numerical analysis technique of square sandwich plates for fixed boundary conditions. In order to reduce computation time and increase accuracy, improved finite difference expression with fourth order truncation error was used.

• 대한화학회지
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• 제63권1호
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• pp.45-50
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• 2019

Because arsenic (As) is a chemical substance toxic to humans, there have been extensive investigations on the development of As detection methods. In this study, the electrochemical determination of As on nanoporous gold (NPG) electrodes was investigated using anodic stripping voltammetry. The electrochemical surface area of the NPG electrodes was controlled by changing the reaction times during the anodization of Au for NPG preparation, and its effect on the electrochemical behavior during As detection was examined. The detection efficiency of the NPG electrodes improved as the roughness factor of the NPG electrodes increased up to around 100. A further increase in the surface area of the NPG electrodes resulted in a decrease of the detection efficiency due to high background current levels. The most efficient As detection efficiency was obtained on the NPG electrodes prepared with an anodization time of 50 s. The effects of the detection parameters and of the Cu interference in As detection were investigated and the NPG electrode was compared to flat Au electrodes.

• 한국농공학회논문집
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• 제63권1호
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• pp.49-60
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• 2021

This paper analyzes causal relationship between rural experience and settlement. Structural Equation Modeling is the combination of factor analysis and multiple regression analysis which can explain causal relation between factors. Rural perception factor has conceptualized positive sector (attitude, values) and negative sector (perceived risk, sentiment). Statistically significant causality results are as follows. People think about migration into rural when they have high level of attitude about rural but fear of rural life make avoid migration into rural. When people have fear of rural life, they also have bad feeling about rural infrastructure and facility. Attitude of rural, values of rural and low fear of rural life gives positive influence to satisfaction. Satisfaction gives positive influence to migration into rural.

• International Journal of Contents
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• 제17권1호
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• pp.18-26
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• 2021

The obesity leads to be the result of the weakening of anatomical structure as well as the gravity effect. And, the obesity interferes with normal sagittal balance and fails to maintain a straight posture with minimal energy. Therefore, the obesity can be an important factor in causing back pain by changing the lumbar lordosis. In this study, we will present an appropriate angle of incidence for obese people to reduce the image distortion of L4, L5 during a general anteroposterior radiography examination. To reduce image distortion according to the change of lordosis, the angle of incidence was applied 9 ° and 21 ° to L4 and L5 vertebra body when obesity and low back pain (LBP) perform the general anteroposterior radiography examination.

• 한국조리학회지
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• 제20권6호
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• pp.13-27
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• 2014

본 연구에서는 외식업에 종사하는 조리사를 대상으로 일자리 불일치로 인한 직무성과의 영향 정도를 고찰하고, 이러한 인과관계에서 이직의도에 어떠한 영향을 미치는 지를 검증하고자 한다. 외식업체 조리사의 경우, 동일 산업 내 업태의 세분화로 인하여 제한적인 메뉴상품을 생산함으로 교육기관을 통해 얻은 스킬을 발현하기 어렵다고 사료된다. 이에 본 연구는 일자리 불일치 실증연구를 위해 확보된 275개의 표본을 바탕으로 SPSS 17.0 프로그램을 통해 빈도분석, 요인분석, 신뢰성분석, 상관관계분석, 다중회귀분석을 실시하였다. 가설 1은 조리사의 일자리 불일치는 직무성과에 유의한 부(-)의 영향을 준다고 설정하였으며, 검증직무성과 요인은 스킬불일치(${\beta}$=-0.432), 임금불일치(${\beta}$=-0.250)가 조리사의 직무성과에 부(-)의 영향을 주는 것으로 나타났으나, 학력불일치(${\beta}$=-0.048)는 영향을 주지 않는 것으로 나타났다. 가설 2는 조리사의 직무성과는 이직의도에 유의한 영향을 준다고 설정하였으며, 검증결과, 이직의도요인은 직무성과(${\beta}$=-0.238)에 유의한 부(-)의 영향을 주는 것으로 나타나, 직무성과가 향상되면 이직의도는 감소하는 것으로 나타났다. 본 연구는 외식업에 종사하는 조리사들이 일자리 불일치를 경험하게 되어 이직의도로 연결되는 관계에서 조리사 개개인의 직무수준 부합 정도와 임금수준 정도가 중요한 영향을 미친다는 점을 시사한 것으로 볼 수 있다.

• 농촌지도와개발
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• 제19권3호
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• pp.699-727
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• 2012

Conditions of farm crop switching are affected by several important external factors such as agricultural products import opening, policy support, and climate change. Farming environment is always changing; barriers to imports are becoming lower and lower because of FTA and others, and climate change affects a boundary line of cultivation. Those situations give farmers motivation to change crops in order to cope with them. In addition, crop switching has been done in response to the local government measures about purchase of local agricultural products according to the local food and the expansion of organic agricultural products in school meal. Even though the favorable environment toward crop switching has been created, there are not many researches or outcomes regarding crop switching. Only few studies focus on the list of decision-making in crop switching, and locally suitable crop selection is not treated. In order to utilize crop switching as a farm management strategy, the proper frame should be studied and practical researches on application possibility also need. Therefore, study on crop switching is in a timely, proactive manner because farms catch the chance of expansion of school meal by changing crops. This paper applies HERO model used for venture foundation process to crop switching process. Success factors of HERO model are comprised of Habitate, Entrepreneurship, Resource, and Opportunity, and these phased application factors are applied to crop switching process. By doing so, each phase success factor of crop switching can be uncovered. Three farm organizations supplying organic agricultural products to schools are studied in Gyeonggi province. As a result, the stabilization stage cannot be achieved because of the habitate conditions and social conditions with low risk bearing of crop switching and current school meal systems are the main problems to block the diversification of risks. In order to succeed in crop switching, constructing the habitate in local districts or in systems of school meal is more effective than supporting each farm.

• 지역연구
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• 제8권1호
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• pp.31-50
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• 1992

The aim of this paper is to define major factors influencing land development of each of major uses (residential, commercial, industrial) in the process of rapid urban expansion. The main hypothesis of this study is that land use changing patterns are directed by supply side of land managed to public policies rather than demand side. The graphic analysis is applied to relationships between urban growth and land development process of each use and between land development project managed to public policies and land development process. Public and land development projects and zonning protection seem to be major roles of land supply and main determinants of urban spatial structure. Location factors for land development of each uses are selected in 23 variables. Factor analysis is applied to test correlation between variables in 1971 and 1981. Factor structure between two years is similar, but progressive processing of functional separation is derived such as intensive land use is grouped, different location between residential and industrial use is deep. Dependent variables are standardized to logarithm of land development of each use per unit vacant land in two periods, between 1971 and 1980 year and between 1981 year. Correlation analysis between 6 dependent variables and 23 location factors in each years are applied. Major factors of each use are selected in criteria such as high correlation with dependent variables, low correlation between independent variables and common application in two periods. As the result, major factors for residential land development are Land Readjustment Project (LRP), percent of total zoned area in residential zone, residential floor space density per available area, percent of total area in industrial use; for commercial development is distance to CBD, percent of total area in commercial use, residential floor space density per available area in each year, and volumn rate of industrial use; for industrial use is percent of total area of industrial use is percent of total area of industrial use, Industrial Estate Project (IES), LRP, and distance from CBD. Land development pattern of each use between two periods are slightly different. So 6 equation is derived from appling backward method of regession. Adjusted multiple R squares of all is more than 0.5 and those equation is statistically significant and valuable to assist urban land use forecasting.

• 보건행정학회지
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• 제17권3호
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• pp.68-86
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• 2007

This study was performed to explore the effect of customer satisfaction and switching barriers on customer royalties in medical services. 900 households, 1% sample were randomly selected from K city located in Kangwon province. Interview survey was performed with structured questionnaire for the entire people, 923 persons who experienced medical service utilization during one year before survey on time, september, 2002. In comparison of switching barriers by sociodemographic characteristics, lower income group and lower educated group showed the higher level of recognition level on availability of changing the service provider significantly. In terms of economic loss as one of switching barriers, the group of over aged 61, the lower income group and the lower educated group felt higher than other groups. Also, the time loss of switching barrier was recognized in 41-60 aged group and employee in service industry highly. For the perceived risk factor as another switching barrier, the high educated group showed the higher recognition level in performance risk and felt higher social risk than other groups. In analysis of customer satisfaction and loyalty levels by switching barrier components, the lower level of availability of changing the service provider and the higher level of recognition for economic and time loss, they showed the higher satisfaction and loyalty levels. In final step, multiple regression analysis showed the positive relationship between customer satisfaction, switching barrier and customer loyalties. Besides, the moderating effect of switching barrier in relationship between customer satisfaction and loyalties was significant and this results suggests that the influence of customer satisfaction to customer loyalties might be weakened in high level of recognition for switching barrier. In conclusion, perceived risk of economic and time loss as switching barrier is an important factor and should be considered in planning of marketing strategy carefully in terms of defensive marketing.

• 한국산업정보학회논문지
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• 제24권1호
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• pp.109-123
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• 2019

최근 소비자의 욕구가 복잡해지고 까다로워지면서 점차 기업환경이 고객중심으로 빠르게 변화하고 있다. 이에 기업은 시장 및 고객의 욕구변화를 포함하는 무한경쟁 시대에 생존하기 위해, 고객 지향적이며 기업의 지속성을 강조하고 있다. 고객의 다양한 욕구를 충족시키기 위해서는 고객의 만족에서 머무는 것이 아니라 고객감동을 제공해야 한다. 고객감동의 증대가 고객충성도에 미치는 영향을 알아보고자 하였다. 본 연구에서는 첫째, 고객만족과 고객감동의 영향을 받고 있는 고객충성도는 재구매의도에 영향을 미치고 있으며, 둘째, 고객만족 수준이 기대이상이면 고객감동에 영향을 주는 것으로 나타났으며, 고객감동의 중요한 요인으로는 고객의 기쁨을 확인하였다. 셋째, 고객충성도는 고객 유지를 강화시키는 것으로 고객감동 요인 중 관심에 영향을 받는 것으로 나타났다. 마지막으로, 고객만족과 고객감동이 고객충성도의 재구매와 고객유지를 향상시키는 것으로 나타났다.

• 한국체육학회지인문사회과학편
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• 제51권5호
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• pp.559-568
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• 2012

본 연구는 도시 직업여성의 여가동기와 여가제약협상의 관계를 분석하는데 목적이 있다. 연구를 위해 2011년 9월 부터 12월 까지 3개월간 유목적표집법(Purposive sampling)을 활용하여 서울지역 내 기업체, 은행 및 병원 등을 선정하고 총 300부의 설문지를 배부하여 281부가 회수되었다. 이후 응답이 누락되거나 설문내용이 불성실하다고 판단되는 설문 12부를 제외하고 269부의 설문자료를 실제분석에 사용하였다. 자료처리는 SPSS 18.0을 이용하여 빈도분석, 탐색적 요인분석, 신뢰도 분석, 상관관계분석 및 다중회귀분석을 활용하였다. 결과는 다음과 같다. 첫째, 도시 직업여성의 여가동기는 여가제약협상에 정적인 관계가 있는 것으로 나타났다. 둘째, 지적동기는 여가제약협상 하위요인 모두에서 유의한 영향을 미치는 것으로 나타났다. 셋째, 사회적동기는 동반자탐색, 비용·시간관리, 강도조절요인에서 유의한 영향을 미치는 것으로 나타났다. 넷째, 유능적동기는 동반자탐색, 비용·시간관리, 기술습득, 열망변화요인에 유의한 영향을 미치는 것으로 나타났다.