• 제목/요약/키워드: research and development

검색결과 61,314건 처리시간 0.078초

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

  • 조재억;양병기;이홍구;현덕환;정우원;이대종;홍근기;이성은;홍정의
    • Current Photovoltaic Research
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    • 제1권1호
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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.

Expressed Sequence Tag Analysis of Olive Flounder (Paralichthys olivaceus): Genes and Expression Profile from the Liver

  • Lee Jeong-Ho;Kim Young-Ok;Kim Kyung-Kil;Kim Woo-Jin;Park Doo-Won;Park Jung-Youn;Kim Kyu-Won
    • Fisheries and Aquatic Sciences
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    • 제6권3호
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    • pp.110-115
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    • 2003
  • Expressed sequence tag (EST) analysis was conducted using a cDNA library made from the liver mRNA of olive flounder (Paralichthys olivaceus). In the survey of 421 ESTs, 362 showed significant homology to previously described genes while 59 were unidentified or novel. Comparative analysis of the identified ESTs showed that 69 $(19.0\%)$ clones were identified as homologous to the previously reported olive flounder ESTs, and 279 $(77.1\%)$ clones were identified as orthologs of known genes from other organisms. The remaining 14 $(3.9\%)$ clones were identified as orthologs of known sequences with unknown functions. These tagged cDNA clones, identified and unidentified, could provide fundamental baseline data for genomic studies of this species.

Population Pharmacokinetics of Fluoxetine

  • Yun, J.H.;Cho, H.Y.;Kim, S.J.;Park, H.S.;Sohn, S.J.;Yoo, T.M.;Lee, Y.B.
    • 대한약학회:학술대회논문집
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    • 대한약학회 2001년도 Proceedings of the Pharmaceutical Society of Korea
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    • pp.240.2-241
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    • 2001
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염분과 표준 독성물질(Cu, Cd)이 둥근성게(Strongylocentrotus nudus)의 수정 및 배 발생률에 미치는 영향 (Effects of Salinity and Standard Toxic Metals (Cu, Cd) on Fertilization and Embryo Development Rates in the Sea Urchin (Strongylocentrotus nudus))

  • 황운기;이충원;이승민;안경호;박승윤
    • 한국환경과학회지
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    • 제17권7호
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    • pp.775-781
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    • 2008
  • Effects of salinity and standard toxic metals on fertilization and embryo development rates were investigated in the sea urchin, Strongylocentrotus nudus. Spawning was induced by injecting 1ml of 0.5 M KCl into the coelomic cavity. The fertilization and embryo development rates were below 20% when salinity was 25 psu or lower, but were above 90% when salinity was between 30 and 35 psu. The fertilization and embryo development rates in the control condition (not including Cu and Cd) were greater than 90%, but decreased with a high negative correlation (r) of 0.89 and 0.91 with the increasing of Cu and Cd concentrations, respectively. These results suggest that salinity concentrations for successful fertilization and normal embryogenesis of S. nudus are between 30 and 35 psu, and the biological assays of fertilization and embryo development rates using S. nudus are useful methods for the ecological toxicity test of marine pollution elements.

연구개발기관의 업무특성을 반영한 맞춤형 포털 모델 (A Personalized Portal Model characterized for Research and Development Organization's Work Patterns)

  • 송상섭;김선미;김선호;강용수
    • 한국IT서비스학회:학술대회논문집
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    • 한국IT서비스학회 2007년도 추계학술대회
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    • pp.206-209
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    • 2007
  • The work patterns in the organizations performing research and development projects consist of both administrative business with defined processes and knowledge-oriented research and development business with undefined or semidefined processes. This paper describes an enterprise portal model and its services aligned to research and development organization's work patterns. The proposed portal model is focused on constructing personalized workplaces providing knowledge-based services for research and development business, as well as business process management based services for administrative business. The further research will provide more concrete portal model and its applicability to research and development organization's business.

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CDGPS의 요동 측정 결과를 이용한 Spotlight SAR 영상 형성에 관한 연구 (A Study on Spotlight SAR Image Formation by using Motion Measurement Results of CDGPS)

  • 황정훈;고영창;김소연;권경일;윤상호;김형석;신현익
    • 한국군사과학기술학회지
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    • 제21권2호
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    • pp.166-172
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    • 2018
  • To develop and evaluate the real-time SAR(Synthetic Aperture Radar) motion measurement system, true antenna phase center(APC) positions during SAT(Synthetic Aperture Time) are needed. In this paper, CDGPS(Carrier phase Differential Global Positioning System) post processing method is proposed to get the true APC position for spotlight SAR image formation. The CDGPS position is smoothed to remove high frequency noise which exists inherently in the carrier phase measurement. This paper shows smoothed CDGPS data is enough to provide the true APC for high-quality SAR image formation through motion measurement result, phase error estimation and IRF(Impulse Response Function) analysis.

Analysis of Placental Proteins in Somatic Cell Clone Recipient Cows

  • Woo, Jei-Hyun;Chung, Hak-Jae;Kim, Bong-Ki;Ko, Yeoung-Gyu;Kim, Jeom-Soon;Jung, Jin-Kwan;Chang, Won-Kyong
    • 한국동물번식학회:학술대회논문집
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    • 한국동물번식학회 2004년도 춘계학술발표대회
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    • pp.197-197
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    • 2004
  • The purpose of this experiment was to investigate the protein profiles in the placenta of Korean native cows(KNC) transferred cloned embryos and KNC artificially inseminated placental tissues were collected from the cows after cesarean section around parturition, and placental proteins were analyzed. Using two dimensional polyacrylamide gel eletrophoresis and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. (omitted)

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Screening of Silkworm Breeds for Tolerance to Bombyx mori Nuclear Polyhedro Virus (BmNPV)

  • Sivaprasad, V.;Chandrasekharaiah;Ramesh, C.;Misra, S.;Kumar, K.P.K.;Rao, Y.U.M.
    • International Journal of Industrial Entomology and Biomaterials
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    • 제7권1호
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    • pp.87-91
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    • 2003
  • BmNPV (Bombyx mori nuclear polyhedrosis virus) causes nuclear polyhedrosis in silkworms. The tolerance of silkworms to BmNPV is controlled by polygenes. This paper reports on the relative tolerance of silkworm breeds among the germplasm maintained at Andhra Pradesh State Sericultural Research & Development Institute (APSSRDI), Hindupur, India. The silkworm larvae out of second moult were per orally inoculated with BmNPV polyhedra $(l{\times}l0^{th}//ml)$ and reared upto spinning. The response to BmNPV had been categorized into apparent tolerance, real tolerance and susceptibility. Among the 145 silkworm breeds screened, 18 bivoltines and 16 polyvoltines were found to have real tolerance to BmNPV.

Feeding Habits of Yellow Goose Fish Lophius litulon and John Dory Zeus faber in the South Sea of Korea

  • Choi, Jung-Hwa;Sung, Bong-Jun;Lee, Dong-Woo;Kim, Jong-Bin;Oh, Taeck-Yun;Kim, Jung-Nyun
    • Fisheries and Aquatic Sciences
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    • 제14권4호
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    • pp.435-441
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    • 2011
  • The feeding habits of yellow goosefish Lophius litulon and John Dory Zeus faber were studied by analyzing the stomach contents of specimens collected in the South Sea of Korea. In total, 132 hauls were taken during six experimental trawl survey (Tamgu 1) cruises conducted on a seasonal basis (March 2005-October 2007). The main prey items of the two species were similar. Fishes and crustaceans were the most important prey, with neither species showing ontogenetic changes in preferred species. Specifically, Pennahia argentata was the preferred prey item of L. litulon, whereas Trichiurus lepturus and Engraulis japonicus were preferred by Z. faber. Larger Z. faber (>24 cm) preferred bigger prey such as T. lepturus and Larimichthys polyactis, while smaller Z. faber preferred E. japonicus and Acropoma japonicum.

Geometry effect in the drug delivery for therapy with nanomedicines based on the conditions of the sport

  • Zhu, Lemei;Zou, Xuemin;Li, Xi;Zhang, Yuan;Liu, Juan;Xiang, Yuhan
    • Advances in nano research
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    • 제13권3호
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    • pp.217-231
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    • 2022
  • This study investigates the geometrical impact on the nanomedicine drug delivery via nanodevices. A nanomotor made of the nanotube carrying the drug as the motor blade is considered in the blood flow. Physical activities change the blood flow, and sports training enhances the blood flow and plays a significant role in the stability of drug delivery devices. This paper studies the impact of geometrical parameters on the nanomotors carrying the nanomedicine. The effect of physical exercise on the dynamic response regarding the stability of drug delivery devices is discussed in detail.