• 한국정밀공학회지
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• 제31권11호
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• pp.969-974
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• 2014

Previously fabricated electronic devices were used for vacuum manufacturing processes such as conventional semiconductor manufacturing. However, they are difficult to apply to continuous processes such as roll-to-roll printing, which results in very high device manufacturing and processing costs. Therefore, many developers have been interested in applying continuous processes to contact printing or noncontact printing technologies and they proposed various continuous printing techniques instead of conventional batch coating. In this paper, we proposed improved gravure offset printing process as one of the contact printing technique. We used etching pattern geometry with soft core blanket roll for printing of ultra fine line below the 10um.Using this technique we obtained flexible metal grid mesh film as transparent conductive film.

• 디지털융복합연구
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• 제10권9호
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• pp.339-344
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• 2012

기존의 연속 어휘 인식 시스템에서는 의사 결정 트리 기반 공유 모델링 방법을 사용하여 인식률 향상 시킬 수 있었으나 이들 음소 데이타에 대한 검색을 지원할 수 없는 문제로 인해 시스템 모델의 정확성을 확보하지 못한다는 단점이 있다. 이를 개선하기 위하여 연속 어휘 클러스터링 모델에서 음소 단위로 확률 모델을 검색할 수 있는 시스템을 모델링하였다. 본 논문에서 제안한 시스템을 적용한 결과 시스템 성능에서 95.88%의 인식률을 나타내었다.

• Journal of information and communication convergence engineering
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• 제6권3호
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• pp.305-309
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• 2008

This paper presents an innovative prototype of a new conceptual electromagnetic induction eddy current based fluid heating appliance using voltage-fed quasi resonant zero voltage soft switching PWM high-frequency inverter using IGBTs, which can operate at a constant frequency variable power regulation scheme. The promising simple high efficient low noise inverter type electromagnetic induction eddy current based pipeline fluid heating appliance is proposed for saturated steam generator, superheated steam generator, hot water and hot air producer, metal catalyst heating for exhaust gas cleaning in engine. Under these technological backgrounds, a novel electromagnetic induction eddy current Dual Packs Heater(DPH) based pipeline fluid heating incorporates thin metal layer type package for continuous fluid heating appliances applying two types of voltage-fed quasi load resonant ZVS-PWM high frequency inverter. The unique features of a novel electromagnetic induction eddy current DPH based continuous pipeline fluid heating appliance is illustrated on the basis of simulation and discussed for the steady state operating characteristics and experimental results.

• Journal of information and communication convergence engineering
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• 제13권3호
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• pp.189-196
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• 2015

In this paper, we present a rotating auto-zeroing offset cancellation technique, which can improve the performance of touch screen sensing circuits. Our target touch screen detection method employs multiple continuous sine waves to achieve a high speed for large touch screens. While conventional auto-zeroing schemes cannot handle such continuous signals properly, the proposed scheme does not suffer from switching noise and provides effective offset cancellation for continuous signals. Experimental results show that the proposed technique improves the signal-to-noise ratio by 14 dB compared to a conventional offset cancellation scheme. For the realistic simulation results, we used Cadence SPECTRE with an accurate TSP model and noise source. We also applied an asymmetric device size (10% MOS size mismatch) to the OP Amp design in order to measure the effectiveness of offset cancellation. We implemented the proposed circuit as part of a touch screen controller system-on-chip by using a Magnachip/SK Hynix 0.18-µm complementary metal-oxide semiconductor (CMOS) process.

• 한국농공학회논문집
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• 제46권2호
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• pp.77-89
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• 2004

This study was carried out to find out the reasonable optimum design method for the design of prestressed concrete structures. The optimum design problems were formulated and computer programs to solve these problems were developed. To test the reliablity, efficiency, possibility of application and reasonablity of optimum design problems and computer programs, both continuous optimization method and mixed-discrete optimization method were applied to the design of prestressed concrete composite girder and application results were discussed. It is proved that mixed-discrete optimization method is more reliable, efficient and reasonable than continuous optimization method for the optimum design of prestressed concrete structures.

• 디지털융복합연구
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• 제10권11호
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• pp.377-382
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• 2012

본 논문은 반향 제거 평균 예측 LMS 알고리즘을 이용하여 반향 잡음에 강인한 연속 음성 인식 모델인 CHMM 모델을 구성하는 방법을 제안하였다. 변화하는 반향 잡음에 적응하고 연속 음성 인식 성능 향상을 위한 반향 잡음 제거 평균 예측 LMS 알고리즘을 이용하여 CHMM 모델을 구성하였다. 제안한 알고리즘에 의해 구성된 CHMM 모델에 대하여 연속 인식 성능을 평가하였다. 실험 결과 변화하는 환경 잡음을 제거하여 얻은 음성의 SNR은 평균 1.93dB이 향상되었고 연속 음성의 인식률은 2.1% 향상되었다.

• 소성∙가공
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• 제14권6호
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• pp.547-552
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• 2005

In general, the sheet metal and die are described by finite elements for the simulation of the metal forming processes. Because the characteristics as continuum of the sheet metal are represented with triangles and rectangles, the errors occur inevitably in finite element analysis. Many contact schemes to describe the deformation modes exactly have been introduced in order to decrease these errors. In this study, a scheme for continuous contact treatment is proposed in order to consider the realistic behavior of contact phenomena during the forming process. The discrete mesh causes stepwise propagation of contact nodes of the sheet even though the contact region of the real forming process is altered very smoothly. It gives rise to convergence problem in case that the process, for example bending process, is sensitive to the contact between the sheet and the tools. The analysis of the unconstrained cylindrical bending process without blank holder is also presented in order to investigate the effect of the proposed algorithm.

• 산업융합연구
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• 제4권2호
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• pp.19-37
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• 2006

In Korea, by the reason of the rapid growth of internet users and the speedy development of ITC, the sales of cyber malls have grown to be ￦10.68 trillion. Over the past several years, trust and commitment have been viewed key concept and mediated variables in relationship marketing. From 2000s, trust and commitment have been studied in cyber shopping environment. Most of studies are the relationship of trust and loyalty or unidimensional commitment and loyalty. The purpose of our study focused the mediated effects of multidimensional commitment on relationship between trust and loyalty. Trust, affective commitment, and continuous commitment affected positive effects on loyalty. And trust also affected positive effect on affective commitment. Trust didn't affect positive effect on continuous directly. However, There was indirect effect of between trust and continuous commitment via affective commitment.

• 한국산업융합학회 논문집
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• 제25권2_2호
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• pp.219-232
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• 2022

The aim of this study is to provide the dynamic convergence index that reflected the inherent characteristics of the convergence phenomenon and utilized the nationally-funded R&D projects data, thereby suggesting useful information about the direction of the national convergence R&D strategy. The dynamic convergence index that we suggested was made of two indicators: persistency and diversity. From a time-series perspective, the persistency index, which measures the degree of continuous convergence of multidisciplinary nationally-funded R&D projects, and the diversity index, which measures the degree of binding with heterogeneous research areas. We conducted the empirical experiment with 151,248 convergence R&D projects during the 2015~2021 time period. The results showed that convergence R&D projects in both public health and life sciences appeared the highest degree of persistency. It was presumed that the degree of persistency has increased again due to the COVID-19 pandemic. Meanwhile, the degree of diversity has risen with combining with disciplinary such as materials, chemical engineering, and brain science areas to solve social problems including mental health, depression, and aging. This study not only provides implications for improving the concept and definition of dynamic convergence in terms of persistency and diversity for national convergence R&D strategy but also presented dynamic convergence index and analysis methods that can be practically applied for directing public R&D programs.

• 한국콘텐츠학회논문지
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• 제20권4호
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• pp.49-61
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• 2020

최근 공연예술에서 장르 융합형 콜라보레이션과 기술 융합형 콜라보레이션의 물리적인 융합(convergence)은 서로 다른 목표와 이질적인 속성을 전략적으로 융합시킴으로서 대중의 기대수요에 부응하며 새로운 가치의 융합 콘텐츠를 이끌어내는 실험적인 형태로 발전하고 있다. 융합시도 중 발생되는 문제점을 보완하며 공연의 완성도를 높이기 위해서는 각 매체분야 전문가들의 효율적인 협업과정이 연구되고 개선되어야 한다. 본 논문에서는 다매체 융합공연 프로토타입(Prototype) 제작을 통해 시대의 요구에 상응하는 융합공연의 효율적인 협업제작방안을 연구하고자 한다. 공연제작과정을 프리프로덕션(Pre-Production), 프로덕션(Production)으로 분류하여 라이브 연극과 사전제작 영상 애니메이션, 두 매체를 활용한 융합공연의 효율적인 협업제작과정을 작품선정 및 연출방향 설정, 인적구성, 제작일정 계획수립, 시각화과정, 공연연습 및 리허설 등의 과정으로 연구하고자 한다. 융합공연 콘텐츠 기획, 제작방식의 변화, 융합 콘텐츠 간 특수성의 이해를 바탕으로 지속적인 다매체 융합공연을 위한 효율적인 협업제작과정 연구가 진행되어야 융합 콘텐츠 산업 발전 체계화 및 활성화가 가능할 것이다.