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Ground Receiving System for KOMPSAT-2

  • Kim, Moon-Gyu;Kim, Tae-Jung;Choi, Hae-Jin;Park, Sung-Og;Lee, Dong-Han;Im, Yong-Jo;Shin, Ji-Hyun;Choi, Myung-Jin;Park, Seung-Ran;Lee, Jong-Ju
    • Korean Journal of Remote Sensing
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    • v.19 no.3
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    • pp.191-200
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    • 2003
  • Remote sensing division of satellite technology research center (SaTReC) , Korea advanced institute of science and technology (KAIST) has developed a ground receiving and processing system for high resolution satellite images. The developed system will be adapted and operated to receive, process and distributes images acquired from of the second Korean Multi-purpose Satellite (KOMPSAT-2), which will be launched in 2004. This project had initiated to develop and Koreanize the state-of-the-art technologies for the ground receiving system for high resolution remote sensing images, which range from direct ingestion of image data to the distribution of products through precise image correction. During four years development from Dec. 1998 until Aug. 2002, the system had been verified in various ways including real operation of custom-made systems such as a prototype system for SPOT and a commercialized system for KOMPSAT-1. Currently the system is under customization for installation at KOMPSAT-2 ground station. In this paper, we present accomplished work and future work.

Operation of dry distillation process on the production of radionuclide 131I at Puspiptek area Serpong Indonesia, 2021 to 2022

  • Chaidir Pratama;Daya Agung Sarwono;Ahid Nurmanjaya;Abidin Abidin;Triyatna Fani;Moch Subechi;Endang Sarmini;Enny Lestari;Yanto Yanto;Kukuh Eka Prasetya;Maskur Maskur;Fernanto Rindiyantono;Indra Saptiama;Anung Pujiyanto;Herlan Setiawan;Tita Puspitasari;Marlina Marlina;Hasnel Sofyan;Budi Setiawan;Miftakul Munir;Heny Suseno
    • Nuclear Engineering and Technology
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    • v.56 no.4
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    • pp.1526-1531
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    • 2024
  • 131I is a fission product produced in a nuclear reactor by irradiating tellurium dioxide, with a half-life of 8.02 day. The most important and widely used method for making 131I is irradiation using a nuclear reactor and post-irradiation followed by dry distillation. The advantage of the dry distillation process is that the process and the equipment are relatively simple, namely TeO2 (m.p. 750 ℃), which can withstand heating during reactor irradiation. Based on TeO2 irradiation by neutron following the technique of dry distillation was explained for production of 131I on a large scale. A dry distillation followed the radioisotope production operation using the 30 MW GA Siwabessy nuclear reactor to meet national demand. TeO2 targets are 25 and 50 g irradiated for 87-100 h. The resulting 131I activity is 20.29339-368.50335GBq. According to the requirements imposed on the radionuclide purity of the preparation, the contribution of 131I training in the resulting preparation was not less than 99.9 %

Measurement of excited Xe atoms density in accordance with various barrier ribs in AC-PDP by laser absorption spectroscopy

  • Jeong, Se-Hoon;Oh, P.Y.;Hong, Y.J.;Lee, S.B.;Moon, M.W.;Song, K.B.;Lee, H.J.;Yoo, N.L.;Son, C.G.;Han, Y.G.;Jeong, S.J.;Kim, J.H.;Park, E.Y.;Choi, Eun-Ha
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.949-952
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    • 2006
  • We have measured the excited Xe atoms density in the $1s_5$ metastable states by laser absorption spectroscopy in accordance with various barrier ribs. In this experiment, the average density of one cell in the panel with stripe barrier rib has been measured to be $1.8{\times}10^{12}cm^{-3}$. The panel with close type barrier rib has been measured to be $5.1{\times}10^{12}cm^{-3}$.

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Current Status of Emitter Wrap-Through c-Si Solar Cell Development (에미터 랩쓰루 실리콘 태양전지 개발)

  • Cho, Jaeeock;Yang, Byungki;Lee, Honggu;Hyun, Deochwan;Jung, Woowon;Lee, Daejong;Hong, Keunkee;Lee, Seong-Eun;Hong, Jeongeui
    • Current Photovoltaic Research
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    • v.1 no.1
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    • pp.17-26
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    • 2013
  • In contrast to conventional crystalline cells, back-contact solar cells feature high efficiencies, simpler module assembly, and better aesthetics. The highest commercialized cell and module efficiency was recorded by n-type back-contact solar cells. However, the mainstream PV industry uses a p-type substrate instead of n-type due to the high costs and complexity of the manufacturing processes in the case of the latter. P-type back-contact solar cells such as metal wrap-through and emitter wrap-through, which are inexpensive and compatible with the current PV industry, have consequently been developed. In this paper the characteristics of EWT (emitter wrap-through) solar cells and their status and prospects for development are discussed.