• Smart Media Journal
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• v.8 no.4
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• pp.46-52
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• 2019

The size of data generated and collected at industrial sites or in public institutions is growing rapidly. The existing data processing server often handles the increasing data by increasing the performance by scaling up. However, in the big data era, when the speed of data generation is exploding, there is a limit to data processing with a conventional server. To overcome such limitations, a distributed cluster computing system has been introduced that distributes data in a scale-out manner. However, because distributed cluster computing systems distribute data, inefficient use of network bandwidth can degrade the performance of the cluster as a whole. In this paper, we propose a scheme that compresses data when transmitting data in a Hadoop cluster considering network bandwidth. The proposed scheme considers the network bandwidth and the characteristics of the compression algorithm and selects the optimal compression transmission scheme before transmission. Experimental results show that the proposed scheme reduces data transfer time and size.

• Journal of Broadcast Engineering
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• v.17 no.1
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• pp.108-121
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• 2012

As Scalable Video Coding (SVC) is a video compression standard extended from H.264/AVC, it is a way to provide scalability in terms of temporal, spatial and quality. Although the compression efficiency of SVC is increased due to the scalability in many aspect, it is essential to reduce the complexity in order to efficiently use because the complexity is relatively increased. To reduce the complexity of SVC in the paper, we propose fast mode decision algorithm to reduce the complexity of encoding process using direction information of B-picture by efficiently performing inter-layer prediction. The proposed algorithm is a fast mode decision algorithm that makes different from detection mode number of forward and backward, bi-direction in the way using best mode of base-layer up-sampled after simply SKIP mode detection using the direction information of best mode of base-layer up-sampled. The experimental results show that the proposed algorithm approach can achieve the maximum computational time saving about 53% with almost no loss of rate distortion (RD) performance in the enhancement layer.

• 한국벤처창업학회:학술대회논문집
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• 2020.06a
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• pp.113-121
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• 2020

최근 정부가 창업기업에게 3년간 공공금융기관 등을 통해 약 100조원 투입하였으며, 금융위원회가 신용보증기관과 산업은행 등 정책금융 등의 많은 창업지원 자금을 통해 약 35조원을 지원하는 등 최근 3년간(2015년~2018년) 창업기업에 약 100조원 이상을 지원하였다. 실제로 중소기업청의 지원예산 중 스타트업 지원 비중은 85%에 달한 반면 스케일업(성장·성숙기)지원은 15%에 불과하다. 그러나 국내 창업기업의 생존율은 선진국에 비해 턱없이 낮은 것으로 조사되었다. 창업 후 3년간 생존율은 39.1%로 10곳 중 4곳 정도만 살아남는 것으로 조사되었고, 5년간 살아남을 확률은 27.5% 10곳 중 3곳 정도만 살아남는다. 반면 해외 창업기업들은 5년간 창업기업 생존율은 우리나라의 2배에 달한다. 이에 따라 본 연구는 최근 정부의 적극적인 지원이 이루어지고 있는 초기창업자에 대한 연구의 필요성과 함께 창업동기와 창업준비가 사업계속의도에 미치는 영향관계에서 창업만족도의 매개역할에 관한 영향을 실증적으로 분석하고 살펴보고자 한다. 또한, 초기창업자의 창업동기와 창업준비에 기초하여 창업을 한 후에 창업에 대한 만족도를 높일 수 있는 방법보다는 창업 전 부터 사전 준비의 필요성을 고찰하고자 한다. 이러한 관점에서 실무적 시사점을 도출하고, 초기창업자들의 창업만족도를 높이고 계속 가능한 창업수행을 할 수 있도록 유용한 정책적 시사점을 제시하고자 한다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.22 no.5
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• pp.185-191
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• 2022

In this study, we propose a novel super-resolution neural network based on U-Net, residual neural network, and sub-pixel convolution. To prevent the loss of detailed information due to the max pooling of U-Net, we propose down-sampling and connection using sub-pixel convolution. This uses all pixels in the filter, unlike the max pooling that creates a new feature map with only the max value in the filter. As a 2×2 size filter passes, it creates a feature map consisting only of pixels in the upper left, upper right, lower left, and lower right. This makes it half the size and quadruple the number of feature maps. And we propose two methods to reduce the computation. The first uses sub-pixel convolution, which has no computation, and has better performance, instead of up-convolution. The second uses a layer that adds two feature maps instead of the connection layer of the U-Net. Experiments with a banchmark dataset show better PSNR values on all scale and benchmark datasets except for set5 data on scale 2, and well represent local area patterns.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.17 no.5
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• pp.67-80
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• 2022

This study was conducted to derive policy measures such as fostering and supporting by examining the actual conditions of domestic startups. The subject of this study was the start-ups located in Seongnam-si, where Pangyo Techno Valley, which is the highest-level innovation cluster in Korea and is evaluated as a start-up mecca. Startups were defined as startups under 7 years old based on new technologies such as IT, BT, and CT, and the subjects of the study were selected. This can be seen as a step forward from previous research in that it embodies the concept of a startup that was previously abstract in a quantitatively measurable way. As a result of the analysis, about 94% of startups are distributed in the so-called "Death Valley" growth stage, and startups above scale-up, which means full-scale growth beyond BEP, account for about 6%. appeared to be occupied. He cited the problem of start-up funds as the biggest difficulty in the early stages of startups, and cited the loan evaluation method that prioritizes sales or collateral in raising funds as the biggest problem. In addition, start-ups rated the access to private investment capital such as VC, AC, and angel investors at a low level compared to policy funds, which are public funds. Most startups showed a lot of interest in overseas expansion, and they chose matching overseas investors such as overseas VCs as the biggest support for overseas expansion. The overall competitiveness in the overseas market was 49.6 points, which is less than 50 points out of 100, indicating that the overall competitiveness was somewhat inferior. It was analyzed that public support and investment in overseas sales channels (sales channels, distribution networks, etc.) should be prioritized along with enhancement of technological competitiveness in order for domestic startups to increase their competitiveness in overseas markets as well as in the domestic market.

• Journal of the Korean Geographical Society
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• v.48 no.5
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• pp.629-650
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• 2013

This study reviews geographical research trends on 'New industrial agglomeration' in Korea and recommends research issues for further studies. Recent studies on industrial agglomeration region have typically concentrated on empirical case studies from new 'perspectives'. As a result, the establishment and theorizing of frameworks for analysis on industrial agglomeration have been given too little attention. To solve this problem research should be conducted to develop frameworks for analysis integrating noneconomic factors and existing economic factors, a strategy emphasized in new industrial agglomeration theory. By doing so, research investigating viability mechanism and generalization will be invigorated. Meanwhile, research focused excessively on social and cultural conditions of region-related networks between actors in economic space at specific scales should be excluded. In addition, academic research on vitalizing industrial agglomeration region, such as cluster policy, should be strengthened. In order to conduct these research objectives effectively, it is necessary to vitalize overall understanding among researchers of industrial agglomeration and provide a place for collaborative learning.

• 한국벤처창업학회:학술대회논문집
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• 2023.04a
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• pp.29-38
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• 2023

그간 Venture Debt은 벤처기업의 스케일업을 촉진하는 수단으로 인식되어 왔으나, 경기하강 국면에서는 투자유치가 여의치 않은 벤처기업에 유동성을 제공하는 자금공급수단으로서의 중요성이 부각된다. 한편, 2023년 3월 SVB의 파산으로 Venture Debt 취급기관의 지속가능성에 대한 우려가 부각되었다. 이에 본 연구에서는 대출재원의 지속가능성을 염두에 두고, 경기침체기 대안적 자금 공급수단으로서 Venture Debt 활성화방안을 연구하였다. 선행연구들은 주로 전통적 Venture Debt을 분석대상으로 하였으나, 본 연구에서는 벤처생태계의 성장과 경기사이클 변화에 따라 다양해지고 있는 Venture Debt을 유형별로 분석하였다. Venture Debt 유형을 전통적, Growth형, 유동성 지원형으로 구분하고, 각각 SVB, EIB(유럽투자은행), 해외 벤처유동성 지원사례를 중심으로 구조적 특징과 차이점을 분석하였고, 직접대출방식과 BDC 등 간접대출방식을 비교 분석하였다. 이와 함께, 경제성, 시장성, 대출재원 확보가능성 차원에서 국내 도입환경에 대한 실무적·법률적 검토를 병행하였다. 본 연구에서는 국내 활성화방안으로 채권형 BDC 활성화를 통한 민간재원 활용, 벤처전용 유동성지원 프로그램 마련, 제2데스밸리 극복을 위한 Growth형 벤처대출 도입, 독립형 워런트 발행을 위한 법적 근거 마련 등을 제안한다.

• Journal of the Korean Society of Industry Convergence
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• v.27 no.2_2
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• pp.357-361
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• 2024

Halloysite nanotube (HNT) has a nanotube structure with the chemical formula of Al₂Si₂O₅(OH)₄·nH₂O and is a natural sediment of aluminosilicate. HNT has been used as additive to improve the mechanical properties of epoxy composites with exchange of amine group as a terminal functional group using huge amount of organic solvents. In order to save time and simplify complicated procedures, a dry coating machine was designed and used for amine group exchange in previous research. For better applications, it was conducted with different parameters and with scale up settings. Best condition was found to reduce usage of solvent, time and man power.

• Membrane Journal
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• v.34 no.3
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• pp.172-181
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• 2024

Many countries have passed laws to achieve Nationally Determined Contribution (NDC) which is a climate action plan to reduce greenhouse gas emissions and adapt to climate impacts. Although there are various technologies to achieve NDC targets, membrane technologies pose dramatical attractions for the purification of gaseous greenhouse gases or energy sources. Therefore, this review will provide the technological trends of polymeric membranes among various materials due to the advantages of the feasible fabrication process and easy scale-up.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.18 no.5
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• pp.91-107
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• 2023

Lean startup is a concept that combines the words "lean," meaning an efficient way of running a business, and "startup," meaning a new business. It is often cited as a strategy for minimizing failure in early-stage businesses, especially in software-based startups. By scrutinizing the case of a startup L, this study suggests that lean startup methodology(LSM) can be useful for hardware and manufacturing companies and identifies ways for early startups to successfully implement LSM. To this end, the study explained the core of LSM including the concepts of hypothesis-driven approach, BML feedback loop, minimum viable product(MVP), and pivot. Five criteria to evaluate the successful implementation of LSM were derived from the core concepts and applied to evaluate the case of startup L . The early startup L pivoted its main business model from defecation alert system for patients with limited mobility to one for infants or toddlers, and finally to a smart bottle for infants. In developing the former two products, analyzed from LSM's perspective, company L neither established a specific customer value proposition for its startup idea and nor verified it through MVP experiment, thus failed to create a BML feedback loop. However, through two rounds of pivots, startup L discovered new target customers and customer needs, and was able to establish a successful business model by repeatedly experimenting with MVPs with minimal effort and time. In other words, Company L's case shows that it is essential to go through the customer-market validation stage at the beginning of the business, and that it should be done through an MVP method that does not waste the startup's time and resources. It also shows that it is necessary to abandon and pivot a product or service that customers do not want, even if it is technically superior and functionally complete. Lastly, the study proves that the lean startup methodology is not limited to the software industry, but can also be applied to technology-based hardware industry. The findings of this study can be used as guidelines and methodologies for early-stage companies to minimize failures and to accelerate the process of establishing a business model, scaling up, and going global.