• Information Display
• /
• v.4 no.2
• /
• pp.7-10
• /
• 2003

현대는 디스플레이 산업과 같은 표시 소자 산업이 관심의 대상이 되고 있는 시대이다. 이러한 디스플레이 산업의 분야에는 CRT, LCD, PDP가 현재의 산업을 주도해왔고, OLED가 차세대 디스플레이로 주목을 받고 있다. 그래서 에이엔에스는 새로운 SMOLED(Small Molecule Organic Light Emitting Diode)를 제작할 수 있는 장비 및 공정기술을 개발하였다. 현재의 SMOLED 제작공정 및 장비와, 대면적 기판을 사용할 수 있고, 물질의 사용효율 및 공정시간을 단축시킬 수 있는 새로운 에이엔에스 증착장비의 장비 및 공정에서의 장단점을 비교하고 디바이스에서의 기본적인 특성을 비교하여 보겠다.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2007.08a
• /
• pp.427-430
• /
• 2007

Phosphorescent OLED technology is a core technology driver for OLED display and lighting products due to the inherent and demonstrated efficiency advantages. Here we present recent results in our continued advancements of PHOLED power efficiency and operational stability with focus on narrowing emission line-width, reducing voltage, and overall design for maximizing device lifetime.

• ETRI Journal
• /
• v.33 no.5
• /
• pp.814-817
• /
• 2011

In this letter, the distributions of direct current (DC) coefficients for P-frames in H.264/AVC are analyzed, and the distortion model of the Gaussian source under the quantization of the dead-zone plus-uniform threshold quantization with uniform reconstruction quantizer is derived. Experimental results show that the DC coefficients of P-frames are best approximated by the Laplacian distribution and the Gaussian distribution at small quantization step sizes and at large quantization step sizes, respectively.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2011.06a
• /
• pp.1411-1412
• /
• 2011

• Polymer(Korea)
• /
• v.39 no.3
• /
• pp.493-498
• /
• 2015

For biomaterials for skin regeneration with minimized inflammatory response, high bioactivity and biocompatibility are highly required. Also, it should have a porous microstructure to improve cell adhesion and growth. In this study, we extracted a new collagen source from duck's feet which is by-product, and made the shape of sponges from duck's feet collagen (DC) to compare with DBP and SIS. To analyze physical and chemical property of the scaffold, SEM and FTIR were used. MTT assay was used to measure the attachment and proliferation of NIH/3T3 in the scaffolds. RTPCR was used to evaluate the expression of proinflammatory cytokine. Also, 1,1-diphenyl-2-picrylhydrazyl (DPPH) was used to measure the ability of antioxidant activity. Overall, this study shows that DC scaffold is biocompatible and has good physical property. Additionally, DC scaffold shows the potential as wound healing biomaterials.

• Proceedings of the KIEE Conference
• /
• 1991.07a
• /
• pp.504-507
• /
• 1991

Modelling and simulation of booster which is used as step-up DC/DC converter for small scale fuel cell generator is studied. And 2kW booster based on this result is designed. Especially, booster efficiency related with fuel cell and control characteristics are analyzed and a 2kW booster is experimented in various operating condition. As a result, power conversion efficiency is above 74% throughout the whole operating range.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.16 no.4
• /
• pp.120-127
• /
• 2008

A military vehicle undergoes normal to extreme driving conditions, which consequently induce the fatigue and fracture of cabin and frame. So, it is important to estimate the fatigue life of two components at an initial design stage. In this paper, Modal Superposition Method(MSM) was applied to evaluate the durability performance of a small-sized military truck. For reliable durability analysis, a Virtual Test Lab(VTL) Model was established by correlation with experimental results. These data were extracted from actual driving test, modal test, and SPMD(Suspension Parameter Measuring Device) test. This process shows that Virtual Fatigue Analysis can be a useful approach in the development of military vehicles as well as commercial vehicles.

• Journal of Korean Society for Quality Management
• /
• v.39 no.4
• /
• pp.500-506
• /
• 2011

Evolutionary operation (EVOP) proposed by Box(1957) is a method for continuous monitoring and improvement of a full-scale manufacturing process with the objective of moving the current operating conditions toward the better ones. EVOP in experiments with mixtures consists of screening vital few components and making small changes in the current operating condition by making small increments in the proportion of the screened component. In this paper, how to determine operating conditions in EVOP in experiments with mixtures around the current operating condition is proposed. The proposed methods are illustrated with the simulated data based on the well known flare experimental data described by McLean and Anderson(1966).

• Journal of Fisheries and Marine Sciences Education
• /
• v.28 no.5
• /
• pp.1244-1257
• /
• 2016

Recently, the export for SMEs is the main issue as the successful key for enterprises. For this reason, Many SMEs want to try the export and the supports are provided by government. This phenomenon reflects that the export should be necessary to SMEs, even other enterprises. This study analyzes 6 enterprises (Enterprise of middle standing: 2, SMEs:4) to research the main factors for export using the interview and survey. The result provides 5 implications for the export of SMEs in Busan Region. In summary, we can provide 3 main proposes for the export of SMEs. 1) The differentiation of various support that can be a real help to SMEs, 2) The differentiation of education on exports. 3) The simplification for the complex administrative procedures about export.

• Proceedings of the KIPE Conference
• /
• 2015.07a
• /
• pp.317-318
• /
• 2015

본 논문에서는 배터리 충 방전을 위한 고 승압이 가능하며 작은 인덕터를 가진 새로운 양방향 DC-DC 컨버터를 제안한다. 제안 회로는 인덕터를 N1:N2 턴비의 Transformer로 사용하고 Transformer 사이에 스위치, 다이오드를 추가 하였다. 이는 방전 모드 동작에서 입력 전류가 두 개의 Transformer로 전류가 나누어 흐르도록 하였다. 기존 DC-DC 컨버터는 입력 전류가 하나의 인덕터로 흐름으로써 고 전력 시스템에서 높은 전류에 의해 인덕터의 크기가 필요 이상으로 커지는 문제점이 있다. 이를 위해 기존 양방향 회로 방식보다 Transformer의 크기가 0.5배 정도 작은 회로를 제안 하였다. 그리고 기존 방전 Boost 회로는 최대 3배 이상의 승압이 안 되지만 제안 회로에서는 3배 이상의 고 승압이 가능하다. 이를 모의실험 및 실험을 통해 타당성을 검증하였다.