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황사에 의하여 위성통신에 미치는 영향분석 (A study on the effectiveness to satellite communications due to Asian Dust)

홍완표;김학섭;전영신
- 한국정보통신학회:학술대회논문집
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- 한국해양정보통신학회 2004년도 춘계종합학술대회
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- pp.55-58
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- 2004
2004년 3월과 4월중 우리나라에 발생한 황사가 위성통신신호에 미치는 영향을 분석하기 위하여 중앙전파관리소 위성전파감시센터를 통하여 황사발생기간중 L, S, C, Ku 및 Ka 대역의 위성신호에 대한 실효등방성복사전력(EIRP)을 측정하였고 이 측정값을 동 황사발생기간중 기상청에서 측정한 미세먼지농도(PM10)와 미세먼지를 수치화한 광학입자계수기(OPC)의 측정값을 기준으로 황사의 농도와 대기중의 입자의 수치들의 변화량이 위성통신에 미치는 영향에 대하여 분석하였다.
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Semi-Quantitative Exposure Assessment of Occupational Exposure to Wood Dust and Nasopharyngeal Cancer Risk

Ekpanyaskul, Chatchai;Sangrajrang, Suleeporn;Ekburanawat, Wiwat;Brennan, Paul;Mannetje, Andrea;Thetkathuek, Anamai;Saejiw, Nutjaree;Ruangsuwan, Tassanu;Boffetta, Paolo
- Asian Pacific Journal of Cancer Prevention
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- 제16권10호
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- pp.4339-4345
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- 2015
Occupational exposure to wood dust is one cause of nasopharyngeal cancer (NPC); however, assessing this exposure remains problematic. Therefore, the objective of this study was to develop a semi-quantitative exposure assessment method and then utilize it to evaluate the association between occupational exposure to wood dust and the development of NPC. In addition, variations in risk by histology were examined. A case-control study was conducted with 327 newly diagnosed cases of NPC at the National Cancer Institute and regional cancer centers in Thailand with 1:1 controls matched for age, gender and geographical residence. Occupational information was obtained through personal interviews. The potential probability, frequency and intensity of exposure to wood dust were assessed on a job-by-job basis by experienced experts. Analysis was performed by conditional logistic regression and presented in odds ratio (ORs) estimates and 95% confidence intervals (CI). Overall, a non significant relationship between occupational wood dust exposure and NPC risk for all subjects was observed (ORs=1.61, 95%CI 0.99-2.59); however, the risk became significant when analyses focused on types 2 and 3 of NPC (ORs=1.62, 95%CI 1.03-2.74). The significant association was stronger for those exposed to wood dust for > 10 year (ORs=2.26, 95%CI 1.10-4.63), for those with first-time exposure at age > 25 year (ORs=2.07, 95%CI 1.08-3.94), and for those who had a high cumulative exposure (ORs=2.17, 95%CI 1.03-4.58) when compared with those considered unexposed. In conclusion, wood dust is likely to be associated with an increased risk of type 2 or 3 NPC in the Thai population. The results of this study show that semi-quantitative exposure assessment is suitable for occupational exposure assessment in a case control study and complements the information from self-reporting.
https://doi.org/10.7314/APJCP.2015.16.10.4339 인용 PDF KSCI