• 제목/요약/키워드: Science and Technology Space

검색결과 3,589건 처리시간 0.057초

First fringe detection, sensitivity estimation and operation mode of KVN

  • Sohn, Bong-Won;Miyazaki, Atsushi;Byun, Do-Young;Kobayashi, Hideyuki;Je, Do-Heung;Kanya, Yukitoshi;Kurayama, Tomoharu;Lee, Sang-Sung;Jung, Tae-Hyun;Kvn and Vera, Kvn and Vera
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2009년도 한국우주과학회보 제18권1호
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    • pp.56.5-57
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    • 2009

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Development of tantalum based superconducting tunnel junctions

  • Yoon, Ho-Seop;Park, Young-Sik;Park, Jang-Hyun;Yang, Min-Kyu;Lee, Jeon-Kook;Chong, Yon-Uk;Lee, Yong-Ho;Lee, Sang-Kil;Kim, Dong-Lak;Kim, Sug-Whan
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2009년도 한국우주과학회보 제18권1호
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    • pp.64.2-64.2
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    • 2009

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Analysis of Dark Data of the PICNIC IR Arrays in the CIBER

  • Lee, D.H.;Kim, M.G.;Tsumura, K.;Zemcov, M.;Nam, U.W.;Bock, J.;Battle, J.;Hristov, V.;Renbarger, T.;Matsumoto, T.;Sullivan, I.;Levenson, L.R.;Mason, P.;Matsuura, S.;Kim, G.H.
    • Journal of Astronomy and Space Sciences
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    • 제27권4호
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    • pp.401-406
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    • 2010

  • We have measured and analyzed the dark data of two PICNIC IR arrays (P574 and P560) obtained through the Cosmic Infrared Background ExpeRiment (CIBER). First, we identified three types of bad pixels: the cold, the hot, and the transient, which are figured in total as 0.06% for P574 and 0.19% for P560. Then, after the bad pixels were masked, we determined the dark noise to be 20.5 ${\pm}$ 0.05 $e^-$ and 16.1 ${\pm}$ 0.05 $e^-$, and the dark current to be 0.6 ${\pm}$ 0.05 $e^-$/sec and 0.7 ${\pm}$ 0.05 $e^-$/sec for P574 and P560, respectively. Finally, we discussed glitches and readout modes for a future mission.

  • https://doi.org/10.5140/JASS.2010.27.4.401 인용 PDF KSCI

Characteristics of the Plasma Source for Ground Ionosphere Simulation Surveyed by Disk-Type Langmuir Probe

  • Ryu, Kwangsun;Lee, Junchan;Kim, Songoo;Chung, Taejin;Shin, Goo-Hwan;Cha, Wonho;Min, Kyoungwook;Kim, Vitaly P.
    • Journal of Astronomy and Space Sciences
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    • 제34권4호
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    • pp.343-352
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    • 2017

  • A space plasma facility has been operated with a back-diffusion-type plasma source installed in a mid-sized vacuum chamber with a diameter of ~1.5 m located in Satellite Technology Research Center (SaTReC), Korea Advanced Institute of Science and Technology (KAIST). To generate plasma with a temperature and density similar to the ionospheric plasma, nickel wires coated with carbonate solution were used as filaments that emit thermal electrons, and the accelerated thermal electrons emitted from the heated wires collide with the neutral gas to form plasma inside the chamber. By using a disk-type Langmuir probe installed inside the vacuum chamber, the generation of plasma similar to the space environment was validated. The characteristics of the plasma according to the grid and plate anode voltages were investigated. The grid voltage of the plasma source is realized as a suitable parameter for manipulating the electron density, while the plate voltage is suitable for adjusting the electron temperature. A simple physical model based on the collision cross-section of electron impact on nitrogen molecule was established to explain the plasma generation mechanism.

  • https://doi.org/10.5140/JASS.2017.34.4.343 인용 PDF KSCI

레고하우스 : 멀티 인터렉션 공간에서의 협업 (LEGO House Multi Interaction Space Collaboration)

  • ;안상철;안종길;김진욱;고희동
    • 한국HCI학회:학술대회논문집
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    • 한국HCI학회 2008년도 학술대회 1부
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    • pp.481-486
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    • 2008

  • Recent advanced interlace technologies allow the user to interact with different spaces such as Virtual Reality (VR), Augmented Reality (AR) and Ubiquitous Computing (UC) spaces. Here, we present a LEGO House application, a collaborative application which involves multi interaction spaces -VR, AR and UC spaces. The LEGO House application is built based on the VARU framework which is designed for enabling the prototyping of a tangible space application. The application is about an interior design. One user is located in the combined AR and UC space and interacts with the AR LEGO house and the physical smart devices. The other users interact with the virtual LEGO house but they share the same environment, the LEGO house. Therefore, they can collaborate together as they are co-located.

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