• 제목/요약/키워드: 송영봉

검색결과 4건 처리시간 0.017초

파이프 구조물의 소음 및 진동특성 연구 (A Study on Noise and Vibration Characteristics of Pipe Structures)

  • 류봉조;임경빈;이규섭;송영봉;공용식;오부진
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2002년도 춘계학술대회 논문집
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    • pp.334-337
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    • 2002
  • The paper presents noise and vibration characteristics of three kinds of pipe materials (PVC pipe, cast-iron pipe and newly developed pp pipe). In order to measure structure bone noise, impact force using small balls was applied to earth pipe. It was confirmed that structure bone noise can be reduced by more large damping materials. Also, transmission loss of pipes depending on the frequency ranges was investigated by using sound source through speakers.

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국소 진행성 두경부암 환자에서의 Docetaxel과 Cisplatin 유도화학요법 (Docetaxel and Cisplatin as Induction Chemotherapy in Locally Advanced Head and Neck Cancer)

  • 조은희;조근혁;송영봉;최익성;최재원;남승현;김봉석
    • 대한두경부종양학회지
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    • 제21권2호
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    • pp.126-131
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    • 2005
  • Objectives: To evaluate the efficacy and safety of induction chemotherapy with docetaxel and cisplatin in locally advanced head and neck cancer. Materials and Methods: Between June 1998 and December 2004, 30 patients were enrolled and among them, 20 patients were evaluable. Patients were treated with docetaxel $75mg/m^2$ and cisplatin $60mg/m^2$ on day 1 every 21 days. Results: The median age was 71(range 54-80) years old. All 20 patients were male. Nineteen patients had pathologically squamous cell carcinoma and 1 had undifferentiated carcinoma. Fourteen of 20 patients(70%) demonstrated an objective response with two(10%) achieving a complete clinical response and eleven(60%) a partial response. The median response duration was 5.3(1.6-32.1) months and the median time to progression was 5.6(1.4-33.8) months. The median overall survival of all patients was 14(range 2.2-34) months. The median overall survival of responders was 17.5(range 5-34) months and that of non-responders was 3.2(range 2.2-23) months, but it was not statistically significant(p=0.106). During a total of 92 cycles, granulocytopenia worse than CTC(Common toxicity criteria) grade 2 occurred in 6%, thrombocytopenia in 2%, and anemia in 3%, respectively. Non-hematologic toxicities were minor and easily controlled. Conclusion: The induction chemotherapy of docetaxel and cisplatin has moderate efficacy with acceptable toxicities in patients with locally advanced head and neck cancer.

장대사장교의 지진거동 분석시 지반특성 및 파동전달효과를 고려한 설계기준 적용에 대한 고찰 (Study on Application of Wave Travelling Effect and Local Site Effect to Design Standard for Analysing Seismic Behavior of Long-Span Cable-Stayed Bridge)

  • 박연수;송영봉;현기환;이순남;양원열
    • 한국구조물진단유지관리공학회 논문집
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    • 제12권1호
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    • pp.167-174
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    • 2008
  • 최근 국내에서 장대교량의 건설이 증가함에 따라 그에 대한 내진설계의 중요성도 증대되고 있다. 이와같은 여건을 반영하여 새로 개정된 케이블 강교량 설계지침(안)의 내진설계편에서 지진파의 파동전달효과와 지반특성효과를 일부 반영하였다. 본 연구에서는 국내 설계규정에 따라 사장교(주경간500m)의 다양한(균등입력, 파동전달효과, 파동전달효과+지반특성효과) 지진응답해석을 수행하여 설계적용시 문제점에 대하여 검토해 본 결과 장대교의 파동전달효과는 지지점간 거리가 짧은 경우에도 지반이 연약한 경우 큰 영향을 받는 것으로 나타났다. 한편 지반의 종류에 상관없이 파동전달효과와 함께 지점별로 지반특성을 고려한 해석이 그렇지 않은 해석결과보다 큰 값이 산출되었다. 따라서 장대교의 지진응답해석시 파동전달효과 및 지반특성효과의 적용에 대한 세심한 고려가 필요한 것으로 판단된다.