• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.386-386
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• 2017

지하수 해석을 위해 3차원 수치해석 모형이 적용되고 있으나, 다양한 매개변수를 명확히 적용하기에는 한계가 있다. 특히, 수리전도도는 지층의 투수성정도를 나타내는 계수로 지하수 분석에 매우 중요한 매개변수이다. 신뢰성의 확보를 위해 양수시험을 통해 산출된 결과를 이용하고 있으나 소수관정의 시험결과를 유역의 대푯값으로 적용하기에 불확실도가 매우 높고, 수위변화가 독특한 지역의 정확한 수리특성을 적용하기에 한계가 있다. 이 연구에서는 수리전도도 특성을 해석하기 위하여 3차원 수치해석모형을 적용하였으며, 모델보정 방법 중 Regularization(정규화)라고 불리는 Pilot point 기법을 사용하였다. 제주도와 같이 수리전도도 값이 지역별로 차이가 크고 동일 유역 내에도 다른 지질구조를 보이는 등 동일 매질에서 동일 투수성을 보이지 않는 다양함으로 실측값들을 적용하기에 어려운 곳에서 정규화라는 보정방법은 최적화된 방법이다. 지하수위는 중제주유역 내 위치한 12개소 수위관측정의 2016년 연평균수위를 적용하였다. 미계측지역은 제주도 등수위선자료를 이용하여 DEM을 구축하였으며, 임의지점 17개소를 선정하여 대표수위로 적용하였다. 중제주유역의 평균 수리전도도는 82.90 m/day로 분석되었으며, 유역의 동측 하류부는 최대 1,745 m/day로 비교적 큰 결과가 산출되었다. 유역의 중앙에 위치하는 OR관측정을 기준으로 동 서지역의 지하수위를 검토한 결과 서측은 지형구배에 따라 지하수위가 형성하고 있으나, 동측의 경우 상 하류의 표고차가 30m이상 발생되지만 지하수위는 유사한 형태를 보이고 있다. 지하수 흐름에 해석되는 Darcy의 방정식은 수리전도도와 동수경사는 반비례관계를 나타내며, 이 이론에 의해 상 하류 지하수위가 유사하게 형성되는 동측지역은 국부적으로 수리전도도가 높게 형성되는 것으로 확인되었다. 실무에서는 유역경계에 따라 평균화된 매개변수가 적용되므로 명확한 지하수 해석이 어렵고, 수리전도도와 같이 지역적 편차가 심한 매개변수는 다양한 연구를 통해 적용성검토가 수행되어야 한다.

• 지역과문화
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• v.7 no.2
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• pp.1-29
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• 2020

The purpose of this study is to have an opportunity to enhance the role of cultural intermediaries in the region as interest in the cultural media sector increased with the implementation of the Law for Promotion of Regional Culture. First, I discussed the need to pay attention to the local Cultural Intermediaries group as the background of the discussion, confirming that the existing research on the cultural mediation sector was focused on cultural workers in public institutions and government projects. Next, for the theoretical discussion, I reviewed the role of cultural intermediaries contributing to the production of meaning via the concept of cultural intermediaries by Pierre Bourdieu, and described that the mediation of regions and cultures began to emerge as an alternative to the existing centralized structure of cultural production in the context of Korea after the late 1990s. It was found that practices that mediate the region and culture were developed around the group of public artists and cultural activists and the intermediary group played a role in revealing various aspects of the region and dynamically constructing the local public sphere through these cultural practices. Lastly, local curator's cases (Space Beam, Space Imsi, Incheon Spectacle) were studied. The actual cases of activity were analyzed through the cultural practices by focusing on what alternative meanings had been produced in the region and how the region was represented. Each case showed the mediating activity that attempts to change the environment of life while sharing local issues with communities, projects that reconstructs the local professional art sector into a public sphere, and mediating activity that represents local daily culture and form networks through independent publications.

• Journal of vocational education research
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• v.37 no.1
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• pp.31-53
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• 2018

Uncertainty of career environment driven by globalization and shift of employment context drives heavy competition of labor market and anxiety of employment for individuals. New career paradigm based on this environmental change puts emphasis on subjective career success from individual's viewpoint as important career outcome and individual's proactive career development efforts. In addition to this, importance of person-environment fit and person-job fit is growing in relationship between career planning and career success. Based on this perspective, this study aims to identify whether person-environment fit and person-job fit mediate the relationship between career development and subjective career success. Data analysis of questionnaire from 220 employees showed that both fits mediate the relationship. This result implies that individual's proactive career planning is critical to career success and this strengthens one's satisfaction to organization and job. To organization, strategies need to be developed to design career development of employees' based on their career needs and organizational intervention such as job-rotation system.

• Journal of the Korean Geotechnical Society
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• v.16 no.3
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• pp.47-55
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• 2000

본 연구에서는, 유전자 알고리즘을 이용한 piled raft 기초의 최적설계 기법을 제시하였다. 최적설계에 사용한 목적함수는 구조물의 사용한계에 해당하는 부등침하량과 piled raft 기초의 시고비용 차원에서의 말뚝과 raft의 총 중량으로 하였다. 유전자 알고리즘은 다읜의 적자생존의 법칙을 따르는 자연진화 법칙을 바탕으로 한 최적화 기법이다. 본 연구에서는 piled raft 기초의 해석방법으로 Clancy(1993)가 제시한 "hybrid" 해석방법을 사용하였으며, 유전자 알고리즘기법은 Goldberg(1989)가 제시한 단순 유전자 알고리즘(SGA)을 적용하였다. 또한 유전자 알고리즘을 이용한 최적설계기법의 유효성을 평가하기 위해 설계예제 및 매개변수변화연구를 통해 piled raft 기초시스템의 중요 설계인자들에 대한 분석을 수행하였다. 매개변수변화연구로부터 말뚝의 길이와 raft의 두께가 증가할수록 piled raft 기초시스템의 전체 중량은 일정한 값에 점차적으로 수렴하였으며, 지반의 강정, raft의 두께 말뚝의 길이 및 강성이 증가할수록 말뚝의 최적위치는 raft의 중앙에 집중되는 경향으로 나타났다.경향으로 나타났다.

• Journal of the Society of Naval Architects of Korea
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• v.29 no.2
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• pp.73-78
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• 1992

Numerical method by Abdi et al. for obtaining a stress singularity near a crack perpendicular to the interface between two elastic materials is reviewed. More efficient and simple method to obtain crack singularity by shifting a mid-side node of 8-node isoparametric element is presented. It is observed that the present analysis provides increased accuracy for the expression of the opening displacement and the determination of the optimal position of the mid-side node for a wide range of material properties.

• Journal of Digital Convergence
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• v.17 no.1
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• pp.229-237
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• 2019

The present study examined the mediating effects of self-esteem on the relationships between adult attachment and smartphone addiction. Participants were recruited from universities in a number of cities in Korea and they were given the survey including instruments that measured adult attachment, self-esteem, and smartphone addiction. Total 230 participants' data were analyzed and the results indicated anxious attachment was significantly positively correlated with smartphone addiction but negatively associated with self-esteem. Avoidant attachment was only negatively associated with self-esteem. Furthermore, self-esteem partially mediated the relationship between anxious attachment and smartphone addiction. Current findings can contribute to the development of the effective prevention/intervention programs of smart phone addiction for a young adults.

• Korean Journal of Culture and Social Issue
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• v.30 no.2
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• pp.221-238
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• 2024

The purpose of this study was to explore the effects of intolerance of uncertainty and experiential avoidance on relationship addiction and to investigate the mediating effect of experiential avoidance in the relationship between intolerance of uncertainty and relationship addiction among unmarried adults. For this purpose, an online survey was conducted on unmarried adults aged 20 to 29 who are currently engaged in opposite-sex romantic relationships, and a total of 302 data were used for analysis.. The collected data were analyzed using SPSS 29.0 and PROCESS MACRO v4.2. The main results of this study are as follows. First, intolerance of uncertainty and experiential avoidance had significant effects on relationship addiction. Second, experiential avoidance had a significant mediating effect between intolerance of uncertainty and relationship addiction tendencies. This study identified individual psychological factors that induce relationship addiction. Based on the research results, this study suggests directions for counseling interventions to reduce relationship addiction tendencies and promote healthier relationship patterns among unmarried adults.

• Korean Journal of Environment and Ecology
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• v.25 no.3
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• pp.412-420
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• 2011

This study was conducted to quantitatively analyze the temporal change of green space network at multi-scales from 1975 to 2006 with the application of graph theory in Seoul, Korea. Remarkable change of connectivity was detected in green space networks at the scale ranging from 1,000 ~ 1,600 m during 30 years. Green spaces and their networks have been restoring after 1990 since forest areas had been fragmented in 1975. In 2006, we identified the important core habitat areas that can sustain diverse wildlife species and stepping stones composed of small patches that can link these core habitat areas. Green spaces showed high correlation with the relative importance value of green space connectivity. So, this study could graphically represent green space networks of Seoul City. Green spaces of core areas distributed at the northern and southern boundary, and those of stepping stones possessing the high value of betweenness centrality consisted at the middle, eastern and western boundary. These results indicate that green space network can be graphically and quantitatively explained by degree centrality, betweenness centrality and relative importance value of connectivity with the application of graph theory.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2006.05a
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• pp.205-210
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• 2006

국가GIS사업과 지방자치단체의 지리정보 구축사업을 통해 많은 양의 지리정보가 구축 및 관리되고 있으며, 지리정보시장의 수요 또한 다양화되고 있다. 지리정보가 공개되어 활용될 수 있도록 하기 위해서는 지리정보 구축 보유기관이 데이터를 적극적으로 공급하고, 이를 통해 부가가치를 창출할 수 있는 환경을 조성할 필요가 있다. 또한 지리정보를 이용할 수 있는 매개체역할을 수행하는 지리정보유통수단 및 방법은 온라인과 오프라인의 다양한 경우가 존재하므로 지리정보의 활성화를 위한 분석 및 정비가 필요하다. 따라서 본 연구에서는 법률을 근거로 하여 다양한 지리정보유통경로를 지리정보유통망을 중심으로 정비하는 방안을 제시하고, 공공부문의 역할모델을 수립하였다. 공공부문은 중앙정부와 지방자치단체 중심의 공급기관으로 구분하여 각각의 역할을 정립하였으며, 중앙정부는 홍보 유통을 위한 기반기술개발 민간과의 파트너십을 구축하고 지방자치단체는 지리정보의 공급과 갱신을 담당한다. 이를 통해 '공급-부가가치창출-유지관리'를 중심으로 중앙정부와 지방자치단체간의 상호작용을 통해 유통시장을 활성화시키고, 나아가 민간과의 협력을 통해 역할모델의 효율성을 높일 수 있는 방안을 제시하였다.

• Analyses & Alternatives
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• v.7 no.2
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• pp.111-145
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• 2023

This study examines the impact of political connections of Chinese listed firms on CSR(Corporate Social Responsibilities) activities. Firms recognize the political connections as 'non-market strategy' and actively utilize various benefits obtained through them for management activities. In order to utilize these political connections, there is a need for firms to implicitly perform the government's social policy obligations in return for their benefits. In particular, CSR activities in China are one of the government-led social policies unlike in the West, and the government wants firms to solve social problems through active CSR activities. In this background, this study empirically verifies whether firms with political connections are actively carrying out CSR activities required by the government from 2013 to 2019. As a result, Chinese listed firms with political connections have a positive effect on CSR activities. Especially, those with political connections with central government carry out both government benefits and social policy obligations.