• Title/Summary/Keyword: Korean(Chosun)

Search Result 9,685, Processing Time 0.04 seconds

Design and Fabrication of Light-guiding Plate for a Photobioreactor by Using Sunlight and Linear Fresnel Lens (태양광과 선형 프레넬 렌즈를 이용한 광생물반응기용 도광판 설계 및 제작)

  • Kim, Hun;Shin, Seong Seon;Hwang, Min Yong;Lim, Hyon Chol;Kim, Gwang Ho;Kim, Jong Tye;Jeong, Sang Hwa;Park, Jong Rak
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.30 no.2
    • /
    • pp.143-147
    • /
    • 2013
  • We present results of the optical design and fabrication of a light-guiding plate (LGP) for a photobioreactor by using sunlight and a linear Fresnel lens. LGP patterns were designed by optical simulations with an illumination design tool, LightTools, and fabricated by using a computerized numerical control machine. Optical characteristics of average deviation of illuminance distribution and light throughput efficiency were measured and compared with simulation results.

Prognosis of Maxillary Sinus Augmentation in the Presence of Antral Pseudocyst: Case Reports

  • Mah, Deuk-Hyun;Kim, Su-Gwan;Oh, Ji-Su;You, Jae-Seek;Kim, Won-Gi;Yang, Jung-Eun;Lim, Hyoung-Sup
    • The Journal of the Korean dental association
    • /
    • v.54 no.10
    • /
    • pp.771-779
    • /
    • 2016
  • Purpose: Antral pseudocyst is a common benign lesion that exists in the maxillary sinus. Because of this possible complication, controversy remains with respect to sinus floor elevation operations. The purpose of this study was to analyze the antral pseudocyst related to maxillary sinus augmentation. Patients and Methods: The radiographs of 268 patients who visited Chosun University Dental Hospital from 2008 to 2010 and underwent the maxillary bone grafting procedure were examined. Results: Of the 268 patients who underwent the maxillary bone grafting procedure, 5 patients (1.86%) were diagnosed with antral pseudocysts. In all cases, maxillary sinus floor elevation was performed without aspiration, biopsy or extraction of the antral pseudocyst. Conclusion: Antral pseudocysts are not considered a contraindication for maxillary sinus bone grafting procedure.

  • PDF

The Research on the Modernization of House through The Architectural Association of Chosun - Four Competitions of House Design published in "Chosun and Architecture" during 1922-1944 - (조선건축회 활동으로 보는 주택근대화 -1922년-1944년 『조선과건축』 에 게재된 4개 주택설계현상모집을 중심으로-)

  • 서귀숙
    • Journal of the Korean housing association
    • /
    • v.15 no.1
    • /
    • pp.63-74
    • /
    • 2004
  • Since the Japanese colonization,\ulcornerThe Architectural Association of Chosun(AAC)\ulcornerwas founded by the Japanese architects residing in Chosun. It is necessary to study the house related activities of this AAC as the process of modernization of Korean houses. As research materials,\ulcorner Chosun and Architecture\ulcornerwas used and the main concern of this research was based on competition of house design which were published in the magazines. There were four competitions which reflected the activity background of AAC with the social circumstances at that time and the research was done especially on the definite situation of the competition of house design. Also, the prize winning works were analyzed accordingly.

50KW Photovoltaic Generation System for Model House Power Supply Using Alternative Energy (대체에너지 이용 시범주택 전원용 50KW 태양광발전시스템)

  • Park, J.M.;Park, J.H.;Kim, K.B.;Lee, K.Y.;Shin, S.H.;Cho, G.B.;Baek, H.N.
    • Proceedings of the KIEE Conference
    • /
    • 2002.07b
    • /
    • pp.1335-1337
    • /
    • 2002
  • This paper presents experimental operation with utility interactive 50kw photovoltaic generation system. And that describe configuration of utility interactive photovoltaic system which power supply for dormitory. The status of photovoltaic generation system components and interconnection and safety equipment will be summarized. This paper discusses property operation state which system endure division of power for dormitory.

  • PDF