• 제목/요약/키워드: REPRODUCTION

검색결과 5,455건 처리시간 0.032초

디지털 복제 시대의 지식, 미디어, 정보 - 지식의 기술.사회적 조건 변화를 중심으로 (Knowledge, Media and Information in the Age of Digital Reproduction)

  • 백욱인
    • 한국언론정보학보
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    • 제49권
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    • pp.5-19
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    • 2010
  • 이 논문에서는 벤야민과 맥클루언의 복제와 전기라는 두 가지 개념을 토대로 하여 디지털 복제 시대 지식의 위상과 성격을 밝히고자 하였다. 복제와 전기는 디지털 시대 지식의 탈물질화를 해명하는 실마리이다. 탈물질화는 디지털 시대 지식의 기술적 조건으로서 그것이 갖는 현상 형태에 대한 이해의 실마리를 제공한다. 이 논문은 디지털 복제 시대의 변화된 기술적 사회적 조건이 무엇인지 분석하고, 그런 조건에서 지식이 어떤 모습을 갖게 되는가를 검토한다. 이를 위하여 기계 복제, 전자 복제, 디지털 복제의 차이점을 정보, 미디어, 지식의 상호관련 속에서 분석하였다. 이러한 연구의 의미는 디지털 복제 시대의 지식이 처한 기술적 사회적 조건을 밝힘으로써 향후 이에 대한 본격적인 논의의 출발점을 마련하는 데 있다.

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고연색 CCFL을 이용한 TFT-LCD 색재현율의 향상 (The Improvement of color reproduction ratio used to CCFL with high color rendering characteristic in TFT-LCD)

  • 박기덕;송영기;박두성;김서윤;임영진
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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    • pp.438-440
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    • 2005
  • At present, characteristic of high color reproduction for LCD TV is needed in Display market according to start mass production of LCD TV. Therefore development target for LCD is focused on improvement of color reproduction. The improving methods of high color reproduction are alteration of color Filter or Red, Green, Blue phosphor alteration of CCFL. But decrease of luminance and panel transmittance is caused by alteration of Color Filter. Accordingly, we completed LCD with high color reproduction by the most suitable emission spectrum of CCFL phosphor at panel with conventional color filter. In this experiment, we knew that LCD applied to CCFL with high color rendering characteristic had color reproduction range of 81% compared with NTSC in CIE color coordinate. According to increase of intensity peak and alteration of Red, Green, Blue phosphor spectrum, we made LCD with high color reproduction characteristic. In conclusion we achieved improvement of color reproduction ratio by alteration of CCFL phosphor without changing color filter.

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An infertile patient with Y chromosome b1/b3 deletion presenting with congenital bilateral absence of the vas deferens with normal spermatogenesis

  • Kuroda, Shinnosuke;Usui, Kimitsugu;Mori, Kohei;Yasuda, Kengo;Asai, Takuo;Sanjo, Hiroyuki;Yakanaka, Hiroyuki;Takeshima, Teppei;Kawahara, Takashi;Hamanoue, Haruka;Kato, Yoshitake;Miyoshi, Yasuhide;Uemura, Hiroji;Iwasaki, Akira;Yumura, Yasushi
    • Clinical and Experimental Reproductive Medicine
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    • 제45권1호
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    • pp.48-51
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    • 2018
  • We report the case of a 46-year-old Chinese male patient who visited our clinic complaining of infertility. Semen analysis revealed azoospermia, and azoospermia factor c region partial deletion (b1/b3) was detected using Y chromosome microdeletion analysis. Testicular sperm extraction was performed after genetic counseling. The bilateral ductus deferens and a portion of the epididymis were absent, whereas the remaining epididymis was expanded. Motile intratesticular spermatozoa were successfully extracted from the seminiferous tubule. On histopathology, nearly complete spermatogenesis was confirmed in almost every seminiferous tubule. To our knowledge, this is the first case report of b1/b3 deletion with a congenital bilateral absence of the vas deferens and almost normal spermatogenesis.

Successful onco-testicular sperm extraction from a testicular cancer patient with a single testis and azoospermia

  • Kuroda, Shinnosuke;Kondo, Takuya;Mori, Kohei;Yasuda, Kengo;Asai, Takuo;Sanjo, Hiroyuki;Yakanaka, Hiroyuki;Takeshima, Teppei;Kawahara, Takashi;Kato, Yoshitake;Miyoshi, Yasuhide;Uemura, Hiroji;Iwasaki, Akira;Yumura, Yasushi
    • Clinical and Experimental Reproductive Medicine
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    • 제45권1호
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    • pp.44-47
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    • 2018
  • Onco-testicular sperm extraction is used to preserve fertility in patients with bilateral testicular tumors and azoospermia. We report the case of a testicular tumor in the solitary testis of a patient who had previously undergone successful contralateral orchiectomy and whose sperm was preserved by onco-testicular sperm extraction. A 35-year-old patient presented with swelling of his right scrotum that had lasted for 1 month. His medical history included a contralateral orchiectomy during childhood. Ultrasonography revealed a mosaic echoic area in his scrotum, suggesting a testicular tumor. The lesion was palpated within the normal testicular tissue along its edge and semen analysis showed azoospermia. Radical inguinal orchiectomy and onco-testicular sperm extraction were performed simultaneously. Motile spermatozoa were extracted from normal seminiferous tubules under microscopy and were frozen. Eventual intracytoplasmic sperm injection using the frozen spermatozoa is planned. Onco-testicular sperm extraction is an important fertility preservation method in patients with bilateral testicular tumors or a history of a previous contralateral orchiectomy.