• Title/Summary/Keyword: AR

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The study of ionization coefficients in mixtures of $SF_6$ and Ar ($SF_6$-Ar혼합기체의 전리계수에 관한 연구)

  • Kim, Sang-Nam;Ha, Sung-Chul
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2003.05e
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    • pp.96-99
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    • 2003
  • In this dissertation the results of the combined experimental and theoretical studies designed to understand and predict the spatial growth and transport coefficients for electrons in $SF_6$ and $SF_6$-Ar mixtures have described. The transport coefficients for electrons in (0.1[%])$SF_6$-Ar, (0.5[%])$SF_6$-Ar, (1.0[%])$SF_6$-Ar, (3.0[%])$SF_6$-Ar and (5.0[%])$SF_6$-Ar mixtures were measured by time-of-flight method, and the electron energy distribution function and the parameters of the velocity and the diffusion were determined by the variation of the collision cross-sections with energy.

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Effect of Ar ion Sputtering on the Surface Electronic Structure of Indium Tin Oxide

  • Lee, Hyunbok;Cho, Sang Wan
    • Applied Science and Convergence Technology
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    • v.25 no.6
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    • pp.128-132
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    • 2016
  • We investigated the effect of Ar ion sputtering on the surface electronic structure of indium tin oxide (ITO) using X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS) measurements with increasing Ar ion sputtering time. XPS measurements revealed that surface contamination on ITO was rapidly removed by Ar ion sputtering for 10 s. UPS measurements showed that the work function of ITO increased by 0.2 eV after Ar ion sputtering for 10 s. This increase in work function was attributed to the removal of surface contamination, which formed a positive interface dipole relative to the ITO substrate. However, further Ar ion sputtering did not change the work function of ITO although the surface stoichiometry of ITO did change. Therefore, removing the surface contamination is critical for increasing the work function of ITO, and Ar ion sputtering for a short time (about 10 s) can efficiently remove surface contamination.

The Surface Damage of SBT Thin Film Etched in $Ar/CF_{4}/Cl_{2}$ Plasma ($Ar/CF_{4}/Cl_{2}$ 유도결합 플라즈마에 의한 SBT 박막의 표면 손상)

  • 김동표;김창일;이철인;김태형;이원재;유병곤
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.11a
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    • pp.26-29
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    • 2001
  • SrBi$_2$Ta$_2$$O_{9}$ thin films were etched at high-density C1$_2$/CF$_{4}$/Ar in inductively coupled plasma system. The etching of SBT thin films in C1$_2$/CF$_{4}$/Ar were chemically assisted reactive ion etching. The maximum etch rate was 1300 $\AA$/min at 900W in Cl$_2$(20)/CF$_4$(20)/Ar(80). As f power increase, radicals (F, Cl) and ion(Ar) increase. The influence of plasma induced damage during etching process was investigated in terms of the surface morphology and th phase of X-ray diffraction. The chemical residue was investigated with secondary ion mass spectrometry.y.

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A Simulation of the ionization coefficients in mixtures of $SF_6$ and Ar (시뮬레이션을 이용한 $SF_6-Ar$의 전리계수)

  • Kim, Sang-Nam
    • Proceedings of the KIEE Conference
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    • 2005.07c
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    • pp.2202-2204
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    • 2005
  • In this dissertation the results of the combined experimental and theoretical studies designed to understand and predict the spatial growth and transport coefficients for electrons in $SF_6$ and $SF_6-Ar$ mixtures have described. The transport coefficients for electrons in (0.1[%]) $SF_6-Ar$, (0.5[%])$SF_6-Ar$,(1.0[%])$SF_6-Ar$,(3.0[%])$SF_6-Ar$ and(5.0[%]) $SF_6-Ar$ mixtures were measured by time-of- flight method, and the electron energy distribution function and the parameters of the velocity and the diffusion were determined by the variation of the collision cross-sections with energy.

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Properties of ZnO:Ga Thin Films Deposited by RF Magnetron Sputtering with Ar Gas Flows (RF 마그네트론 스퍼터링법으로 제조한 GZO 박막의 Ar 유량에 따른 특성)

  • Kim, Deok Kyu
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.33 no.6
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    • pp.450-453
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    • 2020
  • In this study, ZnO:Ga thin films were fabricated on a glass substrate using various Ar flows by an RF magnetron sputter system at room temperature. The dependencies of Ar flow on different properties were investigated. An appropriate control over the Ar flow led to the formation of a high-quality thin film. The ZnO:Ga films were formed as a hexagonal wurtzite structure with high (002) preferential orientation. The films exhibited a typical columnar microstructure and a smooth top face. The average transmittance was 85~89% within the visible area. By decreasing the Ar flow, the sheet resistance was decreased due to an increase in the grain size and a decrease in the root mean square roughness. The lowest sheet resistance of 86 Ω/□ was obtained at room temperature for the 40 sccm Ar flow.

A Simulation of the ionization coefficients in mixtures of $SF_6$ and Ar (시뮬레이션을 이용한 $SF_6$-Ar혼합기체의 전리계수)

  • Kim, Sang-Nam
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.1494-1495
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    • 2007
  • In this dissertation the results of the combined experimental and theoretical studies designed to understand and predict the spatial growth and transport coefficients for electrons in $SF_6$ and $SF_6$-Ar mixtures have described. The transport coefficients for electrons in (0.1[%])$SF_6$-Ar, (0.5[%])$SF_6$-Ar, (1.0[%])$SF_6$-Ar, (3.0[%])$SF_6$-Ar and (5.0[%])$SF_6$-Ar mixtures were measured by time-of-flight method, and the electron energy distribution function and the parameters of the velocity and the diffusion were determined by the variation of the collision cross-sections with energy.

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A Study on the Considerations for VR·AR Game QA (VR·AR 게임의 QA를 위한 고려사항 연구)

  • Lee, Jong-Won
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2021.07a
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    • pp.587-589
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    • 2021
  • 메타버스 등 VR·AR을 기반으로 하는 가상세계의 현실화가 점차 가까워지고 있다. 이에 따라 가상세계에서 동작하는 게임이나 다양한 소프트웨어들이 등장하고 있어 이에 대한 QA 방안들이 연구되고 있다. VR·AR 게임은 일반 게임과 달리 장비의 사용 등에 따른 시간적, 공간적 특성 등 여러 가지 고려사항들이 있어 QA 진행에 어려움이 있다. 이를 극복하기 위해서는 VR·AR에 대한 이해를 바탕으로 개발팀과의 협조를 통해 콘텐츠를 세분화하여 작은 범위에서 QA를 단계적으로 진행하는 과정이 필요하다. 본 논문에서는 VR, AR 게임을 QA하는 과정에서 고려해야할 사항들을 알아본다.

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Seamless Superimposition Technique of Virtual Objects for AR System of Excavator Based on Image Processing (굴삭기 AR 시스템을 위한 이미지 프로세싱 기반 가상 이미지 중첩 기술)

  • Lee, Kanghyeok;Park, Joohwan;Kang, Hojun;Shin, Dohyoung
    • Korean Journal of Construction Engineering and Management
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    • v.18 no.2
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    • pp.21-29
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    • 2017
  • Recently, with having a great interest of the general public for the AR (Augmented Reality) technology, there have been lots of study to improve efficiency of a construction equipment with applying the AR technology to a construction equipment. The clear extrinsic calibration is essential to applying AR technology at the construction site without any error which came from superimposition between 'Real world' and 'Virtual world'. However, on the construction site, the clear extrinsic calibration is not possible, because of lack of time and budget for the specific survey, also, the huge error of the outdoor tracking system such as gyro, GPS system and so on. In this study, we do research about seamless superposition with unclear extrinsic calibration and the image process method for making AR navigator operating in the excavator. Based on this study, we figure that we can fully develop the AR navigator for the excavator. Furthermore, thereby operating AR navigator at many construction sites, we expect that the efficiency of the excavator will be improved. In addition, we can develop AR navigator for not only a excavator but all about construction equipment.

The Influence of Food Image Presentation on Purchase Intention With the Use of Augmented Reality: The Mediation Effect of User Engagement (증강현실(AR)을 활용한 음식 이미지 제시가 구매 의사에 미치는 영향: 사용자 참여의 매개효과를 중심으로)

  • Kong, Hae-In;Han, Kwang-Hee
    • Science of Emotion and Sensibility
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    • v.22 no.3
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    • pp.65-76
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    • 2019
  • Augmented reality (AR) is the technology in which a virtual image made by computer is integrated with the real world. Food is one of the most popular products purchased online. In this study, we investigated how the presentation of food images with AR affects purchase intention and user engagement. We hypothesized that purchase intention was increased more by AR food images than by static food images. We also examined whether user engagement mediates the relationship between image presentation format and purchase intention. To test this hypothesis, participants in one group saw AR food images, and participants in another group saw static food images on an iPad. All participants then answered questions about user engagement and purchase intention. As predicted, participants who saw an AR food image reported higher user engagement and higher purchase intention than did those who saw a static food image. The indirect effect of user engagement was also significant, and the link between image presentation format and purchase intention was fully mediated by user engagement. We also found that aesthetic appeal, one of the sub-factors of user engagement, fully mediated the link between image presentation format and purchase intention. Thus AR images of food images were aesthetically more appealing, which led to higher purchase intention. These findings suggest that AR technology can be used effectively as a way to advertise food.