• International Journal of Naval Architecture and Ocean Engineering
• /
• 제6권3호
• /
• pp.652-669
• /
• 2014

This paper concerns the kinematic characteristics of a coupling device in a deep-seabed mining system. This coupling device connects the buffer system and the flexible pipe. The motion of the buffer system, flexible pipe and mining robot are affected by the coupling device. So the coupling device should be considered as a major factor when this device is designed. Therefore, we find a stable kinematic device, and apply it to the design coupling device through this study. The kinematic characteristics of the coupling device are analyzed by multi-body dynamics simulation method, and finite element method. The dynamic analysis model was built in the commercial software DAFUL. The Fluid Structure Interaction (FSI) method is applied to build the deep-seabed environment. Hydrodynamic force and moment are applied in the dynamic model for the FSI method. The loads and deformation of flexible pipe are estimated for analysis results of the kinematic characteristics.

• 한국정밀공학회지
• /
• 제34권1호
• /
• pp.59-63
• /
• 2017

We present a multi-sample array device based on a pneumatic system. Solenoid valves were used to control a micro valve in a pneumatic system. The use of a compressor together with a vacuum pump ensured that one outlet could supply both compression and vacuum pressure. The multi-sample array device was fabricated using conventional photolithography and PDMS casting. The device was composed of a multiplexer, sample array, and rinsing. The multiplexer could control four sample solutions injecting into the sample array chamber. Sample solution not arrayed was removed by DI-water from the rinsing inlet. To prevent trapping of microbubbles in the channel during injection of sample solution into the device, surfactant was added in PDMS solution to serve as a hydrophilic surface treatment. As a result, the device could be used as a sample array for 64 cases, using four samples and three columns of three chambers.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
• /
• 제4권3호
• /
• pp.91-96
• /
• 2015

최근 IT 분야의 화두 중 하나는 '모빌리티(mobility)'이다. 이동성 및 가동성 등의 뜻을 가진 모빌리티는 사용자의 정보를 획득하여 사용자에게 서비스 이동의 자유로움을 제공할 수 있다는 의미이다. 본 논문에서는 모빌리티 환경에서 다양한 미디어를 다양한 디바이스로 이동할 수 있는 프로세스 오케스트레이션(MPO: Mobility Process Orchestration) 모델을 제안하고자 한다. 오케스트레이션 모델은 사용자 환경에 있는 디바이스를 오브젝트화하여 사용자에게 원하는 미디어를 원하는 디바이스에 MSMP(Multi Source Multi Platform)형태로 제공할 수 있는 구조와 기능을 제공한다. 이뿐만 아니라, 커리어그래피(Choreography)의 개념을 이용하여 다양한 미디어 형식에 맞는 디바이스만을 추출 및 오케스트레이션 하여 사용자에게 조화로운 서비스(Harmonizing Service)를 지향한다.

• 한국재료학회지
• /
• 제15권8호
• /
• pp.543-547
• /
• 2005

Organic electroluminescence devices were made from 1,4-bis-(9-anthrylvinyl)benzene (AVB) and 1,4-bis-(9-aminoanthryl)benzene (AAB) anthracene derivatives. Device structure was ITO/AVB/PANI(EB)/Al (multi-layer device) and ITO/AAB:DCM/Al(single-layer device). In these devices, AVB, polyaniline(emeraldine base) (PANI(EB)) and AAB were used as the emitting material. 4-(dicyanomethylene)-2-methyl-6-p-(dimethylamino)styryl-4H -pyran(DCM) was used as red fluorescent dopant. We studied change of fluorescence wavelength with concentration of DCM doped in AAB. The ionization potential (IP) and optical band gap (Eg) were measured by cyclic voltammetry and UV-visible spectrum. We compared with difference of emitting wavelength between photoluminescence and electroluminescence spectrum. In case of the multi-layer device, PANI and AVB EL spectra have similar wave pattern to each PL spectrum and when PAM and AVB were used at the same time, and multi-layer device showed that a balanced recombination and radiation kom PANI and AVB. In case of the single-layer device, with the increase of DCM concentration, the blue emission decreases and red emission increases. This indicates that DCM was excited by the energy transfer from AAB to DCM or the direct recombination at the dopant sites due to carrier trapping, or both. The device with $1.0wt\%$ DCM concentration gave white light.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2022년도 추계학술대회
• /
• pp.529-531
• /
• 2022

연구개발특구진흥재단의 2021년 모바일 증강현실 시장 보고서에 따르면 스마트폰의 발전과 더불어 모바일 증강현실 시장의 성장으로 인해 최근 증강 현실 시장이 성장하고 있다. 증강현실 서비스를 모바일 사용자에게 제공하기 위해서는 기기별 네이티브 앱을 제작해야 한다. 하지만 이에는 멀티 플랫폼 대응에 소비되는 유지보수 비용과 앱 다운로드로 인한 낮은 접근성 등의 문제점이 존재한다. 최근에는 WebXR Device API를 활용하여 웹 환경에서 증강현실 시스템을 구축이 진행되는 추세이나, WebXR Device API를 사용한 시스템은 아직 연구단계에 있다고 판단된다. 본 논문에서는 WebXR Device API, Three JS, React를 이용하여 반응형 멀티 플랫폼 환경을 구축하여, 모바일 및 웹 사용자에게 증강현실 서비스를 제공하는 기능을 구현하였다. 실험 결과 반응형 웹 환경에서 증강현실의 연동을 성공적으로 구현되었음을 확인하였으며, 향후 웹 기반에서 동작되는 증강현실 서비스를 기대해본다.

• 한국자기학회:학술대회 개요집
• /
• 한국자기학회 2007년도 The 1st International Symposium on Advanced Magnetic Materials
• /
• pp.179.1-179.1
• /
• 2007

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2005년도 추계학술대회 논문집
• /
• pp.212-215
• /
• 2005

The needs of larger screen in mobile device would be increased as the time of ubiquitous and convergence is coming. And, the type of mobile device has been evolved from bar, slide to row. Recently, the study on the multi-display screen which has seamless gap between two display panel has been published, and moreover the System On Chip(SOC) design strategy of core chip has been the most promising Field-Programmable Gate Array(FPGA) technology in the display system. Therefore, in this paper, we proposed the design technique of SOC and evaluated the effectiveness with Very high speed Hardware Description Language(VHDL) Intellectual Property (IP) for the operation of multi display device driver. Also, This IP design would be to allow any kind of user interface in control system.

• 한국기계가공학회지
• /
• 제6권3호
• /
• pp.112-118
• /
• 2007

Recently, the machine tools called multi-task machines, which mounted rotary axes on the table or spindle are used increasingly. Accordingly, multi-task machine tool takes a growing interest on the motion accuracy of feed drive system. In this study, measurement and diagnosis of motion errors ware attempted from circular pattern obtained by using DBB (Double ball bar) device. Those were obtained at both clockwise and counter clockwise motions in mutually perpendicularly intersecting three planes. The reliability of error measurement system for multi-task machine tool was verified by the direct test cutting.

• 한국기계가공학회지
• /
• 제6권3호
• /
• pp.31-37
• /
• 2007

Recently, the machine tools called multi-task machines, which mounted rotary axes on the table or spindle are used increasingly. Accordingly, multi-task machine tool takes a growing interest on the motion accuracy of feed drive system. In this study, measurement and diagnosis of motion errors ware attempted from circular pattern obtained by using DBB (Double ball bar) device. Those were obtained at both clockwise and counter clockwise motions in mutually perpendicularly intersecting three planes. The reliability of error measurement system for multi-task machine tool was verified by the direct test cutting.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.1
• /
• pp.365-368
• /
• 2004

Charge compensation effects in multi-resurf structure make possible to obtain high breakdown volatage and low on-resistance in vertical MOSFET. In this paper, electrical characteristics of the vertical MOSFET with multi epitaxial layer is presented. Proposed device has n and p-pillar for obtaining the charge compensation effects and The doping concentration each pillar is varied from $5{\times}10^{14}\;to\;1{\times}10^{16}/cm^3$. The thickness of the proposed device also varied from $400{\mu}m\;to\;500{\mu}m$. Due to the charge compensation effects, 4500V of breakdown voltage can be obtained.