• Title/Summary/Keyword: Electronic information room

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A Study on the electrical characteristics of high voltage MOSFET with the various structure under the high temperature condition (Asymmetric 고 내압 MOSFET의 구조적 변화에 따른 고온 영역에서의 전기적 특성 분석)

  • Choi, In-Chul;Lee, Jo-Woon;Park, Tae-Su;Koo, Yong-Seo
    • Proceedings of the IEEK Conference
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    • 2005.11a
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    • pp.579-582
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    • 2005
  • In this study, the electrical characteristic of asymmetric high voltage MOSFET (AHVMOSFET) for display IC was investigated. Measurement data are taken over range of temperature (300K-400K) and various extended drain length, and gate oxide thickness ($175{\AA}$, $350{\AA}$). In high temperature condition, drain current decreased over 30% and max transconductance deceased over 40%, and specific on-resistance increased over 30% in comparison with room temperature.

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A Study on the High Temperature Characteristics of LDMOSFET under various Gate Length (Gate length에 따른 LDMOS 전력 소자의 고온동작 특성연구)

  • Park, Jae-Hyoung;Koo, Yong-Seo;Koo, Jin-Gun;An, Chul
    • Proceedings of the IEEK Conference
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    • 2002.06b
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    • pp.13-16
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    • 2002
  • In this study, the electrical characteristics of 100v-Class LDMOSFET for high temperature applicat -ions such as electronic control systems of automo -biles and motor driver were investigated. Measurement data are taken over wide range of temperature(300k-SOOK) and various gate length(1.5 #m-3.0#m, step 0.3). In high temperature condition(>500k), drain current decreased over 30%, and specific on- resistance increased about three times in comparison with room temperature. Moreover, the ratio ROJBV, a figure of merit of the device, increased with increasing temperature.

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A Study on the electrical Characteristics of High Voltage LDMOSFET in Low Temperature (고내압 LDMOSFET의 저온 특성에 관한 연구)

  • Park, Jae-Hyuong;Lee, Ho-Young;Koo, Yong-Seo;An, Chul
    • Proceedings of the IEEK Conference
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    • 2001.06b
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    • pp.201-204
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    • 2001
  • LDMOSFET devices operated at low temperature have applications on satellite, space shuttle and low temperature system, etc. In this study, we measured the electrical characteristics of 100v Class LDMOSFET for low temperature application. Measurement data are taken over a wide range of temperatures (100K-300K) and various drift region lengths(6.6${\mu}{\textrm}{m}$, 8.4${\mu}{\textrm}{m}$, 12.6${\mu}{\textrm}{m}$). Maximum transconductance, $g_{m}$ and drain current at low temperatures(~100K) increased over about 260%, 50% respectively, in comparison with the data at room temperature. Breakdown voltage B $V_{ds}$, and specific on- resistance decreased. Besides, ratio $R_{on}$ BV, a figure of merit of the device, decreased with decreasing temperature.

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A Study of Housing Design Guidelines for the Single Household (독신 가구의 주거계획 방향에 관한 연구)

  • Cho, Myung-Eun
    • Journal of Families and Better Life
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    • v.20 no.6
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    • pp.219-227
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    • 2002
  • This study was conducted to examine housing preferences among single-person households and to propose guidelines for housing design choices for single people. One hundred and sixty responses to the questionnaire developed by this researcher were analyzed utilizing frequencies, percentages, and t-tests. There were significant differences between single households and non-single households in various aspects of housing preferences. Differences were found in the desired type and size of housing, needed amount of space, and the importance of space itself. Single persons wanted to live in a small apartment, about 83.45$m^2$ (25.29 pyung) size. They consider the bathroom and the master bedroom more important than the living room and kitchen. They prefer to have specifically function-oriented rooms such as shower, home office, computer room, exercise room, or leisure space. Single persons consider information-technological facilities within an apartment very important. They would like to adopt automatic and electronic technology in the house, such as optical communication network, automatic air-cleaning system, and internet TV. Housing preferences differ significantly according to socio-demographic variables such as gender and age. I propose in this study a small-sized, information-, high-tech- and leisure-oriented design that corresponds with the actual housing preferences of the single-person households.

Characteristics of ITO thin films prepared on PC substrate (PC 기판상에 제작된 ITO 박막의 특성)

  • Kim, Kyung-Hwan;Cho, Bum-Jin;Keum, Min-Jong
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2006.06a
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    • pp.420-421
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    • 2006
  • The ITO thin films were prepared by FTS (Facing Targets Sputtering) system on polycarbonate(PC) substrate. The ITO thin films were deposited with a film thickness of 100nm at room temperature. As a function of sputtering conditions, electrical and optical properties of prepared ITO thin films were measured. The electrical and optical characteristics of the ITO thin films were evaluated by Hall Effect Measurement(EGK) and UV-VIS spectrometer(HP), respectively. From the results, the ITO thin film was deposited with a resistivity $8{\times}10^{-4}[{\Omega}-cm]$ and transmittance over 80%.

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Design and Implement of Virtual Dressing Room with Kinect (Kinect를 이용한 AR 가상 피팅룸 설계 및 구현)

  • Kim, Yul-Gon;Oh, Soo-Kyeong;Oh, Jeong-Ah
    • Proceedings of the Korea Information Processing Society Conference
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    • 2020.11a
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    • pp.296-299
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    • 2020
  • 요즘 대한민국은 코로나 19로 인하여 외출이 힘든 상황에 놓여있다. 이에 따라 소비자들은 오프라인 매장에서 의류를 구매하기보다는 인터넷 쇼핑으로의 구매를 선호하게 되었으며 온라인 구매로 인해 정확한 스타일 확인 불가 및 확신할 수 없는 사이즈로 큰 불편함을 겪고 있다. 따라서 최근 가장 떠오르는 기술 중 하나인 AR을 실생활에 적용하여, 사용자가 의류 매장에 가지 않고 집에서도 편하게 자신의 스타일링을 실현할 수 있도록 하는 AR 쇼룸을 구현하여 솔루션을 제안하고자 한다. 본 프로젝트에서는 3D로의 표현을 위해 Kinect Xbox 카메라를 사용하여 사용자의 신체정보를 추출한 후 unity와의 연동을 통해 사용자에게 편리함을 제공할 수 있는 AR-fitting 시스템을 설계하였다. 또한, 우리는 선택한 옷을 가상으로 입어 볼 수 있는 쇼룸 형태의 서비스를 제공하며 제스처 인식을 통해 보다 편리한 의류 선택 및 사이즈 조절 등을 가능하게 하였고, 이러한 시스템은 사용자의 의류 구매를 보다 효과적으로 만들어 줄 수 있을 것이다.

IMPROVING THE SPEECH INTELLIGIBILITY IN AN AIR-TRFFIC CONTROL ROOM

  • Pavuza, Franz G.;Beszedics, Geza W.;Pichler, Heinrich
    • Proceedings of the Acoustical Society of Korea Conference
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    • 1994.06a
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    • pp.912-918
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    • 1994
  • Poor speech intelligibility in an air traffic control room is frequently a result of many, quite different causes and occasionally leads to complaints of the controller personnel. The paper describes a sequence of successful tasks performed in a local control room. The initial measurements included an investigation of the background noise (caused by fans, air condition, computer and radar equipment) and performance checks of the electronic audio and communication equipment with respect to the audio transmission behavior. The spectral composition of the noise as well as the characteristics of the audio communication path between the controllers and the pilots(which showed a loss of spectral information in the audio band due to built-in notch filters for the suppression of control tones) required adaptations of the amplitude behavior of the amplifiers through user adjustable tone controls. The radar console fans, which contributed significantly to the overall noise floor of the room, underwent a substantial reconstruction by replacing the tight mounting with an elastic double suspension, reducing the noise level by 50%. Finally, a possible source of untimely fatigue of the controllers during their working hours has been found in strong spectral components of the noise above the audio band, radiated by numerous video monitors in the control through vibrating components excited by the line frequency of the video signal.

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Electrical, optical, and structural properties of IZTO films grown by co-sputtering method using ITO and IZO target (ITO와 IZO 타겟의 Co-sputtering 방법으로 성장시킨 IZTO 박막의 전기적 광학적 구조적 특성연구)

  • Jeong, Jin-A;Choi, Kwang-Hyuk;Moon, Jong-Min;Bae, Jung-Hyeok;Kim, Han-Ki
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2007.06a
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    • pp.379-380
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    • 2007
  • The characteristics of a co-sputtered indium zinc tin oxide (IZTO) films prepared by dual target dc magnetron sputtering from IZO and ITO targets at a room temperature are investigated. Film properties, such as sheet resistance, optical transmittance, surface work function and surface roughness were examined as a function of ITO dc power at constant IZO dc power of 100 W. It was shown that the increase of the ITO dc power during co-sputtering of ITO and IZO target resulted in an increase of sheet resistance of the IZTO films. This can be attributed to high resistivity of ITO film prepared at room temperature. Surface smoothness and roughness were investigated by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The synchrotron x-ray scattering results obtained from IZTO film with different ITO contents showed that introduction of ITO atoms into amorphous IZO film resulted in a crystallization of IZTO film with (222) preferred orientation due to low alc transition temperature of ITO film. However, the transmittance of the IZTO films with thickness of 150 nm is between 80 and 85 % at wavelength of 550 nm regardless of ITO content. Possible mechanism to explain the ITO and IZO co-sputtering effect on properties of IZTO is suggested.

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A Study on User Service and Enhancement Strategy for Chungnam Representative Library (충남대표도서관 이용자 서비스 및 활성화 전략 연구)

  • Kwak, Seung-Jin;Noh, Younghee;Yu, So-Young;Kim, Jeong-Taek
    • Journal of the Korean Society for Library and Information Science
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    • v.50 no.4
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    • pp.283-310
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    • 2016
  • The present study aims to develop measures to enhance user service at Chungnam Representative Library by establishing Chungnam Representative Library Operation Master Plan. To this end, I conducted a literature review, analysis of services of other representative libraries, and a survey. The study results suggested six measures for user service enhancement. The first measure is space-specific programs, such as children's materials room, general materials room, electronic materials room, auditorium, multipurpose room, outdoor stage, exhibition room, and book café. The second measure is the services specific user types, such as children, adolescents, adults, the disabled, and multicultural families. The third measure is information service specific for information type, such as print material service and digital material service. The fourth measure is the service for the Information-Poor including the expansion of mobile library service, the service for information users in special environment, and the development of mobile library rules. Fifth measure is information service for Chungcheongnam-do residents, such as Baekje Studies specialized service that incorporates local characteristics, specialized information service for Chungcheong Studies and local materials, and information service for administrative and policy materials. The last measure is the measure to secure initial users and early stage service enhancement.

Physical correlation between annealing process and crystal structure and magneto-resistance of Bismuth thin films (열처리 공정과 비스무스 박막의 결정구조 및 자기저항 특성변화와의 물리적 관계)

  • Jang, Seok Woo;Seo, Young-Ho;An, Ho-Myoung
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.3
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    • pp.638-642
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    • 2014
  • In this study, we investigate on the crystal microstructure and magneto-resistance (MR) change of Bismuth(Bi) thin films for annealing process, in order to apply Bi thin films to the spin electronic devices. As-prepared Bi thin films show the randomly oriented find grains whose size was measured to about 100 nm and the very low MR (4.7 % at room temperature) while careful annealing results in not only grain growth up to ${\sim}2{\mu}m$ but also drastic MR improvement (404 % at room temperature). The drastic change in the MR after applying the annealing process is attributed to the grain growth decreasing grain boundary scattering of electron. Therefore, in this study, we confirm the annealing effect for the grain boundary formation and MR improvement of Bi thin films, and demonstrate the feasibility of spin electronic devices.