• Proceedings of the Korea Technology Innovation Society Conference
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• 2017.11a
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• pp.1523-1529
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• 2017

신정부의 탈원전 정책에 의해 급속하게 원자력계를 둘러싼 환경이 변하고 있다. 지금까지의 정부가 추진해온 원자력 중심의 전원계획이 신재생에너지 확대를 위한 계획으로 변화되어 가고 있다. 그리고 이러한 정부 정책 추진의 중심에는 매우 높은 대통령 지지율이 기반이 되고 있다. 하지만 여러 여론 조사 결과를 살펴보면 대통령은 약 65% 내외의 지지를 기록함에도 불구하고 원자력 활용에 대해서는 찬반 의견이 매우 팽팽하다. 즉, 원자력에 대한 이슈가 최근 에너지, 경제 문제가 아닌 정치 이슈가 된 상황에서도 원자력에 대해 지지를 보여주는 집단이 존재한다는 것을 뜻한다. 하지만 원자력을 지지하는 일반인들이 정치권과 탈핵 시민단체에서 원자력 분야를 소위 '적폐'로 규정하고 '원자력 마피아'로 명명한 상태에서 원자력에 대해 드러내놓고 지지하는 것은 쉽지 않다. 따라서 본 연구는 우리나라의 어떠한 계층에서 원자력을 지지하는지, 즉 'Shy Nuclear'를 찾고 이 지지층들의 특징에 대해서 분석하였다. 지지층 분류를 위해서 머신러닝의 분류분석 기법인 Decision Tree Analysis(의사결정나무) 방법론을 활용하였다. 분석 결과 Shy Nuclear를 결정하는 주 요인은 거주지역으로 나타났다. 아울러 수도권에 거주하고 있는 사무/관리/전문직/퇴직자 집단이 가장 원자력에 높은 호감도(긍정 76.1%)를 보여주었다.

• Magazine of the Korea Concrete Institute
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• v.5 no.1
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• pp.145-155
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• 1993

본 연구에서는 표면부를 에폭시 폴리머 모르터로 하고 , 중심부를 발포 폴리스티렌으로 하는샌드위치 패널을 제조하여, 표면부를 용접철강으로 보강한 경우와 보강하지 않은 경우에 대하여 4강 단순지지 조건에서의 정적 차 통해 하중-처짐, 휨모멘트-변형률, 파괴양상 등을 구명하였다. 단위중량, 극한가중, 휨모멘트는 중심부의 두께보다 표면부 두께에 더 큰 영향을 받으며 극한처짐은 보강안된 경우 표면부 보다 중심부 두께의 영향이 월등히 컸으마 보당된 경우는 표면부나 중심부 두께의 영향이 비슷하였다. 그러나 용접철망의 보강은 샌드위치 패널의 처짐억제 보다 인성증가에 기여도가 높은 것으로 나타났다. 샌드위치 패널의 파괴양상은 보강하지 않은 경우 선형파괴가 일어난데 비해 보강한 경우에는 방사상의 파괴가 일어났다.

• The Journal of the Korea Contents Association
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• v.14 no.4
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• pp.180-188
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• 2014

The purpose of this study was to analyze the effect that the social support for social welfare workers who are the key personnel providing the service to children directly at local child care center would have on job satisfaction. For this study, the social welfare workers of local child care center in Jeollanam-do were surveyed. A total of 240 questionnaires which had been collected were used for analysis. This study analyzed the effect of social support on job satisfaction by defining the demographic characteristics of social welfare workers as the control variables. The results of the analysis showed that the social support had the greatest influence on job satisfaction. Such results suggest that the stronger social support for social welfare workers would increase the job satisfaction of social welfare workers. Based on the results of the analysis, the following recommendations are presented which can help increase social support for social welfare workers: First, it is necessary to standardize the works of social welfare workers at local child care center and provide them with specialized training and education. Second, additional points should be granted to excellent local child care centers. Third, a cooperation system needs to be established which links the networks of colleagues and local societies.

• The Journal of the Korea Contents Association
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• v.13 no.9
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• pp.248-259
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• 2013

The purpose of this study is to investigate the influence of the perceived parental attachment and social support on adjustment to college life in university students. For this study, research data about adjustment to college life, the perceived parental attachment and social support were collected from 386 university students. Results of correlation and multiple regression analysis showed that the perceived parental attachment and social support are the most influential factors. Major findings and conclusions were as follow: First of all, the finding shows that the adjustment to college life has a significant static correlation with both parental attachment and Social support, respectively. Second, parental attachment and social support of friends have more influence on adjustment to college life, especially in academic, social, personal-emotional and environmental one. Thus, results of this study show the importance of a wide variety of policy research, continuous counseling, and development of programs for a better adjustment to college life.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.5C
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• pp.343-350
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• 2006

The resistance bias factors for driven steel pipe piles are evaluated as a part of study to develop the LRFD(Load and Resistance Factor Design) for foundation structures in Korea. The 43 data sets of static load tests and soil property tests performed in the whole domestic area were collected and analyzed to determine the representative bearing capacities of the piles using various methods. Based on the statistical analysis of the data, the Davisson's criterion is proved to be the most reasonable method for estimation of pile bearing capacity among the methods used. The static bearing capacity formulas and the Meyerhof method using N values are applied to calculate the design bearing capacity of the piles. The resistance bias factors of the driven steel pipe piles are evaluated respectively as 0.98 and 1.46 by comparison of the bearing capacities for both of the static bearing capacity formulas and the Meyerhof method. It is also shown that uncertainty of the static bearing capacity formulas is relatively less than that of the Meyerhof method.

• Journal of Korean Tunnelling and Underground Space Association
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• v.19 no.5
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• pp.749-760
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• 2017

Recently, the proportion of tunnel structures in roads and railways has increased rapidly. Along with this trend, the rate of occurrence of cracks and dropouts in concrete lining of tunnel structures is increasing. Generally, maintenance of such concrete lining is normalized and managed as the core of maintenance work in tunnel maintenance. However, the maintenance of the tunnel pavement is important in securing driver in the tunnel. In the design of tunnels, the underground condition of the tunnel is designed to be in good rock condition, so there have not been many cases of cracks in the tunnel pavement in the past. Recently, the construction of tunnel structures has been rapidly increased, and the length of the tunnels has become longer.Tunnel pavement installed in these ground conditions is increasing the occurrence of cracks in the pavement due to decrease of bearing capacity of the pavement after a long time. In this study, FWD and GPR were conducted to analyze the types of cracks and the reduction of bearing capacity in the tunnel.

• Journal of Digital Convergence
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• v.16 no.7
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• pp.165-175
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• 2018

The aim of this study is to examine the effect of self-efficacy of married immigrant women on the quality of life and the moderating effect of family support in the effect relation. For this purpose, the study carried out a questionnaire survey to married immigrant women who attended multi-cultural family support centers in order to take language education and job education. Total 279 were selected as valid samples. The specific analysis results of this study are as follows. Firstly, the self-efficacy of married immigrant women has positive (+) effect on the quality of life. Secondly, the informational support in the family support has negative (-) effect on the quality of life, but evaluative and material support have positive (+) effect. In the interaction with self-efficacy, the emotional support has negative (-) effect, but the interaction with evaluative and material support has positive (+) effect. But, the interaction with informational support has no significant effect on the quality of life. The key factor affecting the quality of life on married immigrant women is the Korean family. Therefore, their quality of life can be enhanced as well as stable settlement in Korea if the families of husbands accept married immigrant women as their family members and support them.

• Journal of the Korean Geosynthetics Society
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• v.10 no.3
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• pp.43-51
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• 2011

This paper describes the results of pullout tests in the laboratory, which are conducted to assess the pullout performance of recently developed geosynthetic strip reinforcement with rounded band anchor. The geosynthetic strip can be used as reinforcements in reinforced soil wall with concrete block facing. The pullout resistance of the geosynthetic strip with rounded band anchor is mobilized by the combination of the interface friction between soil-reinforcement surface and the passive soil resistance caused by the rounded band anchor. Therefore, both the friction resistance and the passive resistance have to be considered in design. From the pullout test results, when the rounded band anchor are formed in the end part of the geosynthetic strip, pullout strength increases about from 10% to 65%. The passive resistance can be evaluated based on the pullout test results.

• Journal of Korean Society of Steel Construction
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• v.27 no.5
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• pp.423-433
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• 2015

A double split tee connection, which is a beam-column moment connection, shows different behavioral characteristics under the influences of the thickness of a T-stub flange, a high-strength bolt gauge distance, and the number and diameter of a high-strength bolt. A double split tee connection is idealized and designed that a flexural moment normally acting on connections can be resisted by a T-stub and a shear force by a shear tap. However, where a double split tee connection is adopted to a low-and medium-rise steel structure, a small-sized beam member can be adopted. Then, a shear tab may not be bolted to the web of a beam. This study was conducted to suggest the details of a connection to secure that a double split tee connection with a geometric shape has a sufficient capacity to resist a shear force. To verify this, this study was conducted to make a three-dimensional nonlinear finite element analysis on a double split tee connection.

• Computational Structural Engineering
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• v.4 no.4
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• pp.97-106
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• 1991

The frequency window method has been extended to include strong coupling and multiple connections between the primary structure and the secondary structures. The rational polynomial expansion of the eigenvalue problem and the analytical methods for its solution are novel and distinguish this work from other eigenvalue analysis methods. The key results are the identification of parameters which quantify the resonance and coupling characteristics; the derivation of analytical closed-form expressions describing the fundamental modal properties in the frequency windows; and the development of an iterative procedure which yields accurate convergent results for strongly-coupled primary-secondary structures.