• 제목/요약/키워드: 이두식

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Aspergillus Fumigatus Infection in Wild Goose (흑기러기에 있어서 Aspergillus fumigatus에 의한 감염증)

  • 신태균;양기천;이헌준;김옥녀;김우택;권오덕;이두식
    • Journal of Veterinary Clinics
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    • v.13 no.2
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    • pp.195-197
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    • 1996
  • 제주도에 서식중인 흑기러기(Branta bernicla)가 식욕감퇴, 점진적인 수척, 호흡촉박 등을 나타내다 폐사하였다. 부검소견으로서는 폐 및 복부기낭에 다수의 위약한 흰색-황색 결절이, 병리조직학적검사결과 괴사병소에 균사와 Aspergillus의소포가 확인되었다. 배양결과 Aspergillus fumigatus 감염증으로 진단된 국내 최초의 보고로 생각된다.

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Study on the characteristic Impedance of Biconical antenna Consisting of 4m conical wires (다소선 Biconical antenna 특성 임피던스)

  • 박정기;이두수
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.11 no.2
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    • pp.27-32
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    • 1974
  • The characteristic impedance of a biconical antenna which is the conical cage consisting of 4m conical wires is obtained analytically under some assumption. The effect of the number of the elements on the characteristic impedance is observed according to the equation of the characteristic impedance derived in this paper. The equation is not convenient for practical use. However, a compact form of the equation is obtained by assuming that the apexangle is not very large. The numerical solution of this approximate equation is found to show errors no more than 2% over a wide range of the apex angle .

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