• 한국전자통신학회논문지
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• 제9권1호
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• pp.111-122
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• 2014

중소기업은 창조경제의 중추적 역할을 담당하는 핵심 성장 동력원으로서 중요한 위치를 차지함에도 불구하고 중소기업의 현실은 희망이 없다. 중소기업의 혁신을 통한 중장기적 성장전략을 제시하고자 유망자유기술 탐색방법을 제안하고, 2006년부터 2010년까지 PCT 출원되어 공개된 특허를 조사하여 기술동향을 정량 분석한 다음, LED품목을 사례로 들어 PCT 및 국내 특허정보를 분석하고, 미래 유망 자유기술을 탐색하였다. 제시된 자유기술탐색 방법은 중소기업의 국제시장 진출 방향 설정 및 국가산업 전략의 수립에도 활용이 가능할 것이다.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제13권4호
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• pp.237-245
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• 2009

A numerical solution is provided for a jet produced by a flow emerging from a slit at the bottom corner of a quarter plane. The flow is characterized by the Froude number F, based on the net volume flux and the width of the slit. We perform the free-surface flow for various values of F and another parameter corresponding to the position of the vertical wall. A jet with back-flow near the edge of the vertical wall is obtained, and the limiting case is a jet with a stagnation point.

• International Journal of Computer Science & Network Security
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• 제21권4호
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• pp.93-102
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• 2021

The world is facing an unprecedented economic, social and political crisis with the spread of COVID-19. The Corona Virus (COVID-19) and its global spread have resulted in declaring a pandemic by the World Health Organization. The deadly pandemic of 21st century has spread its wings across the globe with an exponential increase in the number of cases in many countries. The developing and underdeveloped countries are struggling hard to counter the rapidly growing and widespread challenge of COVID-19 because it has greatly influenced the global economies whereby the underdeveloped countries are more affected by its devastating impacts, especially the life of the low-income population. Information and Communication Technology (ICT) were particularly useful in spreading key emergency information and helping to maintain extensive social distancing. Updated information and testing results were published on national and local government websites. Mobile devices were used to support early testing and contact tracing. The government provided free smartphone apps that flagged infection hotspots with text alerts on testing and local cases. The purpose of this research work is to provide an in depth overview of emerging technologies and recent ICT developments to combat COVID-19 Pandemic. Finally, the author highlights open challenges in order to give future research directions.

• Interaction and multiscale mechanics
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• 제6권2호
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• pp.197-210
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• 2013

A fundamental trend of processor architecture evolving towards exaflops is fast increasing floating point performance (so-called "free" flops) accompanied by much slowly increasing memory and network bandwidth. In order to fully enjoy the "free" flops, a numerical algorithm of PDEs should request more flops per byte or increase arithmetic intensity. A meshfree/GFEM approximation can be the class of the algorithm. It is shown in a GFEM without extra dof that the kind of approximation takes advantages of the high performance of manycore GPUs by a high accuracy of approximation; the "expensive" method is found to be reversely hardware-efficient on the emerging architecture of manycore.

• 한국GIS학회:학술대회논문집
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• 한국GIS학회 2003년도 추계학술대회논문집
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• pp.15-20
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• 2003

As an emerging technology in Computer graphics areas, SVG(Scalable Vector Graphic) makes it possible to make use of Vector graphics for servicing maps in basic internet browsing environment. SVG based thematic map Internet GIS system implemented by this research is free of special server side GIS mapping system and client side extra technology. It provides high-quality vector map which can interact with the user, template map which can be used for other purpose, glance the future map based on Webservices technologies. Many good characteristics of SVG in mapping at computer screen and reusability of SVG document provide new era of visualzation of geographic information.

• 통상정보연구
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• 제16권5호
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• pp.361-385
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• 2014

본 연구는 우리나라 기술무역의 확산을 위하여 기존의 기술무역상대국인 선진국과 BRICs이외의 신흥6개국을 선정, 이들 국가와의 기술무역 실태를 실증분석을 통해 분석하였다. 이를 위해 신흥 6개국, 즉, 남미(멕시코), 아시아(인도네시아, 베트남, 터키), 아프리카(나이지리아, 남아공)과의 2003-2012년 총 10년간의 기술무역 data를 활용하여 우리나라의 기술수출에 영향을 미치는 다양한 변수를 발굴하고 이에 대한 실증분석을 시도하였다. 이러한 실증분석 결과, 우리나라의 총수출에는 신흥6개국의 기술수준별 저위기술의 도입이 클수록 우리나라의 수출이 증가하는 것으로 분석되었다. 또한 중소기업의 경우에는 인구가 많을수록, 무역개방도는 클수록, 거리는 가까울수록 기술수출이 증가하였으며, 대기업의 경우에는 투자유형별로는 공동투자가, 그 밖에 변수로는 무역개방도가 높을수록, 1인당 GDP가 많을수록, 한국의 해당국에 대한 직접투자가 많을수록, 또한 거리는 가까울수록 대기업의 기술수출은 증가하는 것으로 분석되고 있다. 따라서 신흥6개국에 대한 우리나라 기업들의 수출전략은 대기업과 중소기업으로 구분하여 유의미하게 도출된 요인들을 활용, 기술수출 경쟁력 강화를 위한 전략에 적극 활용하여야 함을 강조하고 있다.

• 반도체디스플레이기술학회지
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• 제9권3호
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• pp.29-34
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• 2010

Nanoimprint lithography (NIL) is an emerging technology enabling cost effective and high throughput nanofabrication. To successfully imprint a nanometer scale patterns, the understanding of the mechanism in nanoimprint forming is essential. In this paper, a numerical analysis of polymer flow in thermal NIL was performed. First, a finite element model of the periodic mold structure with prescribed boundary conditions was established. Then, the volume of fluid (VOF) and grid deformation method were utilized to calculate the free surfaces of the polymer flow based on an Eulerian grid system. From the simulation, the velocity fields and the imprinting pressure for constant imprinting velocity in thermal NIL were obtained. The velocity field is significant because it can directly describe the mode of the polymer deformation, which is the key role to determine the mechanism of nanoimprint forming. Effects of different mold shapes and various thicknesses of polymer resist were also investigated.

• ALGAE
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• 제34권1호
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• pp.57-70
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• 2019

DNA metabarcoding is currently used for large-scale taxonomic identification to understand the community composition in various marine ecosystems. However, before being widely used in this emerging field, this experimental and analytic approach still has several technical challenges to overcome, such as polymerase chain reaction (PCR) bias, and lack of well-established metabarcoding markers, a task which is difficult but not impossible to achieve. In this study, we present an adapted PCR-free small-organelles enriched metagenomics (SoEM) method for marine biodiversity assessment. To avoid PCR bias and random artefacts, we extracted target DNA sequences without PCR amplification from marine environmental samples enriched with small organelles including mitochondria and plastids because their genome sequences provide a valuable source of molecular markers for phylogenetic analysis. To experimentally enrich small organelles, we performed subcellular fractionation using modified differential centrifugation for marine environmental DNA samples. To validate our SoEM method, two marine environmental samples from the coastal waters were tested the taxonomic capturing capacity against that of traditional DNA metabarcoding method. Results showed that, regardless of taxonomic levels, at least 3-fold greater numbers of taxa were identified in our SoEM method, compared to those identified by the conventional multi-locus DNA metabarcoding method. The SoEM method is thus effective and accurate for identifying taxonomic diversity and presents a useful alternative approach for evaluating biodiversity in the marine environment.

• 한국생산제조학회지
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• 제23권4호
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• pp.361-367
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• 2014

Ultra-precision positioning plays a crucial role in emerging technologies such as electronics, bioengineering, optics, and various nanofabrication technologies. As a result, various nanopositioning methods have been presented. In particular, nanopositioning using a flexure mechanism and piezo-electric actuator is one of the most valuable methods because of its friction-free motion and subnanometer-scale motion resolution. In this study, a rotational nanoactuator based on a right-circular flexure mechanism and piezo-electric actuator was developed through a consideration of the kinematics and structural deformation. An experimental setup was constructed to verify the performance expectation. Consequently, it was demonstrated that the developed system had a maximum rotational angle of about 0.01 rad, as well as sufficient linearity with respect to the input voltage.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권10호
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• pp.4724-4737
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• 2018

Facebook has quickly infused across cultures worldwide to become a common household term for diverse spectra of netizens, especially youngsters. Inherently, interactive in nature, Facebook provides a common cyber enabled platform for online interactions with social friends, living across the world. However, despite its merits, users also experience certain disadvantages, which include but are not limited to rise in feelings of social comparison, decline in self-esteem, contentment and general subjective well-being. This work aims to determine the role of Facebook in spreading envy and identify factors that trigger such emotions. Due to abductive nature of the study, we used pilot interviews and consulted relevant literature to formulate hypotheses. Further, we used deductive approach and conducted a survey. The results showed that frequent use of Facebook, particularly passive following is main predictor of envy, and social interaction is the biggest cause for development of envious feelings in Facebook users. However, insignificant variation was found while investigating relationship between envy and factors, such as pretentiousness, time spent, accomplishment, everything in life, likes on posts, popularity across genders, marital status and genre.