• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.6
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• pp.508-519
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• 2020

This study empirically investigated the influence of entrepreneurship and technological commercialization capabilities of domestic small and medium-sized manufacturing enterprises on financial performance by mediating technological performance. To achieve this, a survey was administered to their hands-on workers in charge of R&D. The survey results were analyzed through the structural equation model as follows. Entrepreneurship had an effect on technological and financial performance. Technology commercialization capability had an effect on technological performance. However, technological commercialization capabilities were evaluated to be inferior to financial performance, which can be interpreted as financial performance being judged as different between individuals or organizations in terms of technological commercialization capabilities. Technological performance had an effect on financial performance. Technological performance played a mediating role in the effects of entrepreneurship and technology commercialization capability on financial performance. Consequently, it is very important for entrepreneurship and technology commercialization capability to develop new products and improve corporate performance with insufficient financial status or operating system completion.

• Proceedings of the Korea Water Resources Association Conference
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• 2002.05b
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• pp.1316-1321
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• 2002

일반적으로 강우-유출모형은 lumped model과 distributed model로 크게 구분될 수 있으며, 우리나라에서는 이중 비교적 부족한 자료를 이용하여도 개략적 모의가 가능한 전자를 널리 사용하고 있다. 본 연구에서는 이러한 모형들의 매개변수를 보정하는 방법에 관해 연구하였다. 일반적으로 모형의 보정 방법에는 크게 시행오차에 의한 수동보정(manual calibration) 방법과 최적화 기법에 의한 자동보정(automatic calibration) 방법으로 나눌 수 있다. 수동보정 방법은 모형 수행결과를 수문곡선의 시각적 비교에 의해 관측치와 비교하여 모형 운영자의 주관적인 판단하에 조정하는 기법이며, 자동보정 방법은 최적화 기법을 이용8하여 특정한 산정기준(estimation criteria)을 최대 또는 최소화시켜 모형의 매개변수를 결정하는 방법이다. 이러한 최적화기법은 일반적으로 직접탐색법과 경사법으로 구분할 수 있다. 경사법은 수렴속도가 빠르지만 편미분에 의해 방향을 찾아가는 방법으로 편도함수가 필요하므로 수문모형에는 적용하기가 힘들므로 적합하지 않다. 그러나, 보다 많은 컴퓨터 수행시간을 필요로 하는 직접탐색법의 경우 수렴속도는 느리지만, 편도함수를 필요치 않으므로 수문모형의 최적화 기법으로 적합하다고 할 수 있다. 직접탐색법에는 simplex-search 법, 패턴인식(pattern-search)법, rotating-direction 법, brent 법 등이 있으며, 본 연구에서는 직접탐색법의 일종인 패턴인식(pattern -search)법을 이용하여 매개변수 최적화 과정을 모의하였다. 이러한 매개변수 보정모형을 구성한 후 이를 가장 보편적으로 사용되고 있는 유출모형인 각종 단위도법들을 결합하는 모형을 구성하였다. 또한 구성된 모형을 시범유역에 적용하여 나온 결과를 HEC-1에서 적용되고 있는 단일변량 증감법과 같은 최적화 기법을 이용한 결과와 비교·분석을 실시하였다. 본 모형을 활용하여 강우-유출 모형의 매개변수를 지속적으로 산정하고 일반화할 경우 임의의 유역의 수문기상학적 특성에 부합한 매개변수를 정량화 시킬 수 있었다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2010.11a
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• pp.192-195
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• 2010

영상 정보의 정확성을 필요로 하는 다양한 서비스 및 여러 학문 분야의 적용성으로 인해 물리적인 한계성을 극복할 수 있는 고해상도 영상처리 기법의 요구가 대두되고 있다 뿐만 아니라, 인터넷 상의 디지털 콘텐츠 중의 하나인 동영상 UCC의 제작환경이 보편화됨으로써 비전문적인 제작으로 인한 다양한 형태의 해상도 저하 및 영상의 왜곡 현상이 발생하여 고품질의 영상을 추구하는 사용자들의 요구를 충족시키지 못하고 있다. 이러한 문제점을 해결하기 위한 압축 동영상의 개선 된 영상 정보를 획득하기 위한 연구가 이루어지고 있지만 다음과 같은 문제점이 있다. 기존의 방법은 일반적으로 저역 통과 필터 기법과 정규화 영상 복원 방식으로 구분되어 연구되고 있으며, 저역 통과 기법은 계산량 측면에서 장점이 있으나, 영상과 양자화 정도에 따라 적응적이지 못한 단점이 있다. 또한 정규화 복원 방식은 압축 영상의 시각적으로 불편한 현상의 완화 정도를 결정하는 정규화 매개변수를 일괄적으로 모든 화소에 적용해, 화소의 위치에 대한 적응도가 낮고 정규화 매개 변수 선택 시 원 영상에 대한 정보를 알고 있다는 가정을 사용했으므로 실제 사용이 불가능하며, 영상들 사이의 불균일로 인해 적응적으로 처리하지 못하는 단점이 있다. 본 연구에서는 이러한 문제점을 극복할 수 있도록 압축 정보 활용을 통한 POCS 방식을 사용한 coding artifact 제거 방식에 대해 기술한다.

• Journal of the Korea Society for Simulation
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• v.24 no.4
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• pp.89-96
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• 2015

The mediation methods suggested by Baron and Kenny, Sobel, Aroian and Goodman, have widely used to test the mediating effect. However, as there are many problems in statistical test power, as well as statistical accuracy, a bootstrapping technique has been suggested as an alternative. In this paper, we adopt the phantom variables based on the bootstrapping technique to test the mediating effect in multiple mediator model consisting of three or more mediating variables. In particular, we formulate the multiple mediator model for analyzing the relations among organizational resources, the absorption capacity as mediating variables and technology commercialization capabilities. And using the bootstrapping approach, we analyzed the mediating effect of the absorption capacity by setting of phantom variables and calculated total indirect effect size and the statistical significance. The empirical results are as follows. First, we confirmed that the bootstrapping approach and the phantom variable is the very efficient and systematic mediation method. Second, we recognized that there is a difference in the mediating characteristics of the absorption capacity depending on the resource characteristics of human resources and material resources obviously.

• 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 Korea Water Resources Association
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• v.51 no.8
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• pp.677-686
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• 2018

There remain numerous ungauged watersheds in Korea owing to limited spatial and temporal streamflow data with which to estimate hydrological model parameters. To deal with this problem, various regionalization approaches have been proposed over the last several decades. However, the results of the regionalization models differ according to climatic conditions and regional physical characteristics, and the results of the regionalization models in previous studies are generally inconclusive. Thus, to improve the performance of the regionalization methods, this study attaches hydrological model parameters obtained using a spatial proximity model to the explanatory variables of a regional regression model and defines it as a hybrid regionalization model (hybrid model). The performance results of the hybrid model are compared with those of existing methods for 37 test watersheds in South Korea. The GR4J model parameters in the gauged watersheds are estimated using a shuffled complex evolution algorithm. The variation inflation factor is used to consider the multicollinearity of watershed characteristics, and then stepwise regression is performed to select the optimum explanatory variables for the regression model. Analysis of the results reveals that the highest modeling accuracy is achieved using the hybrid model on RMSE overall the test watersheds. Consequently, it can be concluded that the hybrid model can be used as an alternative approach for modeling ungauged watersheds.

• Journal of the Korean Association of Geographic Information Studies
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• v.19 no.4
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• pp.17-35
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• 2016

Earthquake-induced disasters are often more severe in locations with soft soils than firm soils or rocks due to differences in ground motion amplification. On a regional scale, such differences can be estimated by spatially predicting subsurface soil thickness over the entire target area. In general, soil deposits are generally deeper in coastal or riverside areas than in inland regions. In this study, a coastal metropolitan area, Incheon, was selected to assess site effects and provide information on seismic hazards. Spatial prediction of geotechnical layers was performed for the entire study area within the GIS framework. Approximately 7,000 existing borehole drilling data in the Incheon area were gathered and archived into the GIS Database (DB). In addition, surface geotechnical data were acquired from a walkover survey. Based on the built geotechnical DB, spatial zoning maps of site-specific seismic response parameters were created and presented for use in a regional seismic strategy. Site response parameters were performed to determine site coefficients for seismic design over the entire target area and compared with each other. Site classifications and subsequent seismic zoning were assigned based on site coefficients. From this seismic zonation case study in Incheon, we verified that geotechnical GIS-DB can create spatial zoning maps of site-specific seismic response parameters that are useful for seismic hazard mitigation particularly in coastal metropolitan areas.

• Journal of Digital Convergence
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• v.15 no.10
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• pp.233-241
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• 2017

This study has attempted to empirically analyze the mediating effects of small and medium venture firms' manufacturing capability and testing and inspection capability on the relation between their external information network heterogeneity and technology commercialization capability with a view to diversifying the research stream on the influential factors to small and medium firms' technology commercialization capability. By performing the ordinary least squares regression analysis, the Sobel test, and the Baron and Kenny test based on the 683 data of South Korean small and medium venture firms with the IBM SPSS version 23, this study provides the three empirical findings to be useful for future studies on the roles of small and medium venture firms' the manufacturing capability and testing and inspection capability. First, small and medium venture firms' manufacturing capability partially mediates the positive effect of their external information network heterogeneity on their technology commercialization capability. Second, their testing and inspection capability partially mediates this positive effect. Third, their manufacturing capability and testing and inspection capability jointly and partially mediates this positive effect.

• Journal of Technology Innovation
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• v.31 no.1
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• pp.149-173
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• 2023

The purpose of this paper is to analyze the effect of government R&D subsidies on business performance of SMEs in the field of Land, Infrastructure, and Transport. To this end, based on domestic and foreign literature, the performance derived through R&D was classified as primary and secondary parameters, and the commercialization program operated by the government was set as a moderating variable. Regression analysis, double mediation analysis, and moderated mediation effect analysis were used to confirm the effect of government R&D subsidy on project performance and process. As a result of this study, it was confirmed that government R&D subsidies have a significant effect on corporate management performance, and it was confirmed that the primary performance such as papers and patents and the secondary performance such as prototypes and legislative revisions have a double mediating. In addition, when the commercialization program was applied to the first and second parameters, it was confirmed that it played a moderated mediating effect. The results of this study are expected to be used when establishing government R&D support plans to expand business performance and economic effects in the future.

• Journal of KIISE:Software and Applications
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• v.26 no.2
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• pp.284-296
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• 1999

문자 인식 및 영상 인식 분야의 대부분의 연구들은 이진영상(binary image)을 바탕으로 이루어진다. 하지만, 입력영상에서 보다 많은 정보를 얻기 위해 명도영상(grayscale image) 으로 입력받아 필요한 정보를 추출한후 이진영상으로 변환하여 처리하는 방법도 많이 사용되고 있다. 이런 경우, 명도영상으로부터의 보다 깨끗한 이진영상의 획득 여부는 시스템의 성능과도 밀접한 관계가 있다. 본 논문에서는 기존의 대부분의 이진화 방법과는 달리, 실제 이진화를 수행하기 이전에 여러 가지 필터링 기법을 사용하여 영상의 질을 개선시키는 영상개선기법을 사용한후, 기존의 이진화방법을 사용하여 명도영상을 이진화하는 방법을 제안하고자 한다. 영상의 질을 개선시키기 위해서 BM 필터링, 경게선 개선 필터링, Erosion필터링 방법을 사용하였으며 , 기존의 이진화방법으로는 전역적 이진화 방법중 하나로써 클래스간 분산을 이용한 Ostu 방법[1]을 사용하였다. 다양한 종류의 문서를 대상으로 실험하였는데 평가실험에 사용된 영상은 문서 특성에 따라 균일하지 않은 배경을 가진 영상, 순수하게 텍스트로만 구성된 영상, 선성분이 많으며 명도값이 다양하게 나타나는 영상, 텍스트와 선성분이 함께있는 영상 등 크게 4가지 부류로 구분하였고, 평가대상 영상에 대해 매개변수의 개수, 끊어진/잃어버린 /뭉게진 물체가 적은 정도, 실행속도, 매개변수 결정의 용이성, 잡영이 적은 정도를 평가기준으로 선정한 후, 정량적인 평가가 어려운 항목에 대해서는 9개의 등급으로 나누어 이진화 된 영상의 특성을 분석, 평가하였다.