• 벤처창업연구
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• 제12권5호
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• pp.39-53
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• 2017

본 연구는 농촌흡인요인, 귀농준비정도, 귀농지 주거환경, 귀농 지원정책이 귀농만족도에 미치는 영향에 관해 가족요인을 조절효과로 반영하여 연구하였다. 이는 농촌으로 이주율이 증가하고, 귀농에 대한 관심이 증대 되는 시점에 농촌흡인요인, 귀농준비정도, 귀농지 주거환경, 귀농 지원정책이 귀농만족도에 유익한 영향을 미치는지와 독립변수로 제시된 농촌흡인요인, 귀농준비정도, 귀농지 주거환경, 귀농 지원정책과 종속변수인 귀농만족도 간에 가족요인 조절효과를 분석하여, 귀농만족도에 영향을 미치는 변수들을 규명하는데 그 목적이 있다. 본 연구를 위해서 귀농인을 대상으로 한 설문조사를 진행하였고, 최종적으로 237개의 유효한 설문지를 수집하였다. 수집된 자료는 인구통계학적 특성을 통제변인으로 하는 다중회귀분석을 진행하였고 가족요인 조절효과는 조절회귀 분석을 실시하였다. 분석결과는 다음과 같다. 농촌흡인 요인 중 경제적 요인이 높을수록 귀농 만족도가 높아지는 것으로 나타났고, 귀농준비정도에서는 작목준비가, 귀농지 주거환경에서는 안전성, 귀농지원정책에서는 창농지원이 귀농만족도에 정(+)의 영향을 미치는 것으로 나타났다. 가족요인의 조절효과 분석결과 경제적 요인, 작목준비, 편리성과 귀농만족도 간에 가족요인의 조절 효과가 나타났다. 이러한 연구를 통해, 귀농만족을 높이고 도시로의 재 이주율을 줄이기 위해 귀농정책의 적극적인 지원과 귀농지의 안정성 그리고 귀농흡인 요소에서 경제적인 이익이 증대시키는 것이 무엇보다 중요하다는 결론을 도출하였다.

• 대한교통학회지
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• 제19권2호
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• pp.89-98
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• 2001

본 연구는 중차량이 혼재하고 있는 비신호 교차로(혹은 로타리형 교차로)에서 용량분석을 실시하는 경우 중차량에 대한 용량 보정계수의 도출에 관한 것이다. 1997년과 2000년도 미국도로용량편람(Highway Capacity Manual)의 비신호 교차로의 용량분석방법에 의하면 이 경우 기초 임계간격(Base Critical Cap)과 기초 추종시간(Base Follow-up Time)에 각각 보정을 하여 실제 임계간격과 실제 추종시간을 산출한 뒤에 이를 이용하여 잠재용량(Potential Capacity)을 산출하도록 되어 있다. 그러나, 미국도로용량편람에서 제시된 이 방법을 사용하는 경우 다양한 종류의 중차량에 대한 용량보정이 매우 임의적으로 처리될 뿐만 아니라 그 부정확성으로 인하여 실제 비신호 교차로의 운영분석 및 설계를 담당하는 실무자들에게 많은 어려움을 주게 된다. 따라서 본 연구는 비신호 교차로에 대하여 미국도로용량편람에서 채택하고 있는 접근방법을 개선하여 보다 손쉬운 방법으로 용량을 보정할 수 있는 간단한 보정계수의 산정 공식을 제공하여 이 분야의 발전에 도움을 주고자 한다. 본 연구에서 제시하고 있는 중차량 용량 보정식은 비신호 교차로에 대한 미국도로용량편람의 제시된 공식과는 달리 일반 고속도로의 용량분석시에 사용되는 중차량 보정식과 유사한 형태의 것으로 유도가 되며 이 보정식의 도출과정에서 새로운 개념의 승용차 환산계수(PCU)의 산정식이 소개된다.

• 가정과삶의질연구
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• 제25권6호
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• pp.121-131
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• 2007

The purpose of this study was first to reveal the factors of time management behaviors of college students. The second purpose was to examine the effects of those factors on the satisfaction of time management. The data were collected from 400 college students in Seoul by a self-administered questionnaire. Frequencies, Cronbach's alpha, Factor analysis, Pearson's correlation analysis and Multiple linear regression were conducted by SPSS WIN12.0. The major findings were as follows. First, factor analysis of 20 items on the time management behaviors related questions revealed six factors: establishment of standards, reality, overlapping, checking, adjusting and facilitating. Second, many factors such as facilitating, establishment of standards, reality, overlapping were significant in the regression analyses for the satisfaction of time management. Especially, establishment of standards and facilitating had high levels of effort on the satisfaction of time management. In combination, these results suggest that establishment of standards and facilitating are very important factors for high satisfaction of time management.

• Structural Engineering and Mechanics
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• 제39권6호
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• pp.767-793
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• 2011

An efficient edge-based smoothed finite element method (ES-FEM) has been recently developed for solving solid mechanics problems. The ES-FEM uses triangular elements that can be generated easily for complicated domains. In this paper, the complexity study of the ES-FEM based on triangular elements is conducted in detail, which confirms the ES-FEM produces higher computational efficiency compared to the FEM. Therefore, the ES-FEM offers an excellent platform for adaptive analysis, and this paper presents an efficient adaptive procedure based on the ES-FEM. A smoothing domain based energy (SDE) error estimate is first devised making use of the features of the ES-FEM. The present error estimate differs from the conventional approaches and evaluates error based on smoothing domains used in the ES-FEM. A local refinement technique based on the Delaunay algorithm is then implemented to achieve high efficiency in the mesh refinement. In this refinement technique, each node is assigned a scaling factor to control the local nodal density, and refinement of the neighborhood of a node is accomplished simply by adjusting its scaling factor. Intensive numerical studies, including an actual engineering problem of an automobile part, show that the proposed adaptive procedure is effective and efficient in producing solutions of desired accuracy.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.497-497
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• 2013

Semiconducting amorphous InGaZnO (a-IGZO) has attracted significant research attention as improved deposition techniques have made it possible to make high-quality a-IGZO thin films. IGZO thin films have several advantages over thin film transistors (TFTs) based on other semiconducting channel layers.The electron mobility in IGZO devices is relatively high, exceeding amorphous Si (a-Si) by a factor of 10 and most organic devices by a factor of $10^2$. Moreover, in contrast to other amorphous semiconductors, highly conducting degenerate states can be obtained with IGZO through doping, yet such a state cannot be produced with a-Si. IGZO thin films are capable of mobilities greaterthan 10 $cm^2$/Vs (higher than a-Si:H), and are transparent at visible wavelengths. For oxide semiconductors, carrier concentrations can be controlled through oxygen vacancy concentration. Hence, adjusting the oxygen partial pressure during deposition and post-deposition processing provides an effective method of controlling oxygen concentration. In this study, we deposited IGZO thinfilms at optimized conditions and then analyzed the film's electrical properties, surface morphology, and crystal structure. Then, we explored how to generate IGZO thin films using DC magnetron sputtering. We also describe the construction and characteristics of a bottom-gate-type TFT, including the output and transfer curves and bias stress instability mechanism.

• Progress in Superconductivity
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• 제3권2호
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• pp.229-234
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• 2002

In this paper, we analyzed the fault current performance in a $high-T_{c}$ superconductor(HTS) which was installed on flux-lock reactor with an external magnetic field coil covering the HTS. In this HTS fault current limiter using flux-lock concepts, the initial limiting current level can be controlled by adjusting the inductance of the coils. Furthermore, the current limiting characteristics of $high-T_{c}$ superconducting FCL can be improved by applying the external magnetic field into the $high-T_{c}$ superconductor. This paper discusses current limiting performance according to the inductance of the coil 1 in two cases with ac magnetic field coil or not and suggests the methods to improve the current limiting factor $P_{limit}$, which is defined as the ratio of the limited current $I_{FCL}$ at the current limiting phase to the prospective short -circuit current $I_{PSC}$.TEX> PSC/.

• 대한통합의학회지
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• 제4권2호
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• pp.97-107
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• 2016

Purpose : Cardiovascular disease is major factor of mortality in worldwide. Previous studies shown that the socioeconomic factors, nutrition factors, health behavior factors, biological factors and co-morbidity are increasing a prevalence of cardiovascular disease. Method : This study examined the risk factors for cardiovascular disease among adults aged 30 years and older using the data from the 2012 to 2014 Korean National Health and Nutrition Examination Survey (KNHANES). The study participants were 7,555 Cardiovascular disease includes hypertension, stroke, angina pactoris, and myocardial infarction. Descriptive statistic and multivariates logistic regression were calculated. Result : The overall prevalence of cardiovascular disease was 31.16% in the participants. Cardiovascular disease was significantly associated with gender, age, income, education, marital status as socioeconomic factors in unadjusted model. After adjusting socioeconomic status variables, past smoker (OR 1.27, 95% CI 1.05-1.55), obesity (OR 7.14, 95% CI 4.21-12.11), skipping a meal (OR 2.79, 95% CI 2.46-3.16), HDL-C (OR 0.99, 95% CI 0.98-0.99) and WC (OR 1.06, 95% CI 1.05-1.07) were associated with cardiovascular disease. Conclusion : The results marked the importance of finding high risk groups and an early management of cardiovascular disease.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1997년도 봄 학술발표회 논문집
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• pp.161-168
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• 1997

The purpose of this study is to evaluate the possibility of normalization of the distibutions of soil parameters taken from soft ground and the reliability of the safety factors of specific objects on it, including sanitary landfill. Through this study it is found that distributions of soil parameters could be adjusted to appropriate normal distributions as possibility density functions(PDF), and that especially the group of initial cohesions and the coresponding safety factors has a perfect linear correlation. According to those results the PDF to initial cohesion as possibility parameter can not only be tmsformed to the PDF to safety factor but also, conseqently, the reliability of the safety factor(SF) simply based on the mean value of soil parameter(Co) can be calculated or easily picked up from the standrad normal distribution table. It is therefore concluded that even though calculated values of safety factors are over any standard requirements some possibility of risk both to the objects and natural soft ground could be still existing, and also a new standard value for this slope stability control system should be derived just by adjusting old one according to the magnitude of risk possibility.

• 한국조리학회지
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• 제7권2호
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• pp.195-215
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• 2001

This study is of an analysis of the kinds of influences on the subordinate variables through the adjusting variables by the independent variables which serve as the perception factor of job stress. also This study, with taking the workers for the hotel employees who are in the room, food & beverage and cook, was carried out so as to analyze deeply and throughly the stress of work they experience in doing their job and the tension incited from this stress and the strategy used for meeting this stress to grope for raising plan for the degree of satisfaction with their job of the workers for the hotel. In order for, this study ran paralled with literature study and research study, taking 615 workers who are now working in hotel. Job stress is easily negligible in hotel business not only because it is hard to identify and measure its concrete entity on account of its intangible characteristic but also because it is impossible to check physically the relationship with each direct behavior. If job stress continue, however, it can cause neglect of duty, change of occupation, deterioration of service quality and eventually aggravate the cost of a hotel business and decrease the hotel sales. Consequently, it is highly necessary to increase job satisfaction by identifying systematically and eliminating the stress factor of hotel employees in order to accomplish particularly experience unique job stress in the course of contact since they should provide the customer with their services.

• 지역사회간호학회지
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• 제6권2호
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• pp.250-258
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• 1995

The purpose of this study was to determine the level of health promotive behavior of adults and thereby to develope the health promotive behavior scale adjusting our sociocultural situation. The item for health promotive behavior was aquired from statements which was reported by Kim through deep interview with 164 Korean adults. The scale was measured with 4 points Likert type. Data was collected with questionnaire for population living in farm of Chungnam Province and Dae Jon City, from July to August 1994 by research assistant trained by researchers. Data was analysed using SPSS program with Cronbach $\alpha$ and factor analysis. The results are as follows : 1. For the reliability of the scale, Cronbach $\alpha$ was .8264 2. The factor analysis to examine the construct validity showed that health promotive behaviors included 9 factors: health management (16.0%), regular life style(7.4%), psychosomatic control(5.6%), moderation of living(4.6%), stress rnanagement(4.1%), abstain from favorite (3.9%), sanitary habit (3.8%), thought (3.2%), diet habit(3.1%). Nine factors explained 51.7% of varient.