• 한국위성정보통신학회논문지
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• 제3권1호
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• pp.48-54
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• 2008

최근 이상 기상현상의 증가와 함께 일기예보의 중요성은 점점 커져가고 있다. 본 논문에서는 특수한 기상 환경에서의 일기예보를 수행하기에 적합한 레이다 영상 분석 관측을 다룬다. 특히 2007년 봄의 황사와 2006년 강원도 지방에 집중호우를 일으킨 제3호 태풍 에위니아를 레이다 영상을 통해 분석하고자 한다. 우리 나라에서는 해마다 황사현상의 빈도와 농도가 증가하고 있으며, 집중호우를 동반한 태풍 때문에 큰 피해를 입고 있기 때문에 레이다 영상을 이용한 기상환경 분석은 점차 중요해 질 것으로 예측된다. 봄철에 가장 많이 발생하는 황사는 우리나라에 가장 크게 영향을 미치는 것이 만주지방에서 발생한 것인데, 굉장히 작은 입자들로 형성되어 있기 때문에 이동속도도 빠르고, 직접적으로 우리나라에 피해를 입히는 경우도 많은 것으로 파악된다. 또한 태풍의 크기와는 상관 없이 집중 호우를 동반하고 있는 기상현상에 대해서는 레이다 영상뿐만 아니라 기압도도 참고로 하여 분석하는 것이 더 필요할 것으로 생각된다. 인공위성 영상을 직접 분석하여 태풍이나 황사의 이동경로를 예측해 보고, 실제로 예측 결과가 맞는지 확인하는 작업을 수행함으로써, 정량적인 기상 예보 가능성을 추론해볼 수 있을 것이다. 자연 재해로 인한 피해를 줄이고 더 큰 인재로 확산되는 것을 방지하고자 하는 수단으로써 레이다 영상 분석을 동반하는 인공위성 영상 활용은 점차 그 가치가 높아질 것으로 예상된다.

• 한국환경보건학회지
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• 제45권6호
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• pp.630-637
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• 2019

Objectives: This study was performed to evaluate the secular changes in indoor airborne dust or endotoxin levels in the dust from swine confinement buildings. Indoor levels were compared with the level at the exhaust outlet in order to examine the contribution potential of indoor dust to nearby ambient air dust. Methods: Comparisons were made on inhalable and respirable dust levels reported in 2002, 2012, and 2017 from 14, 10, and 36 swine fattening confinement buildings in Korea, respectively. This data was produced by the same research group. Levels of endotoxin adsorbed into inhalable or respirable dust were also compared. Samples of inhalable or respirable dust were collected indoors and at exhaust outlets from 17 swine fattening confinement buildings in 2019, and dust levels were compared between the indoor and the outlet. Results: The outlet inhalable dust level (0.111 mg/㎥) was approximately 19% of that from indoors, and the respirable dust level (0.033 mg/㎥) was approximately 74% of that from indoors. The outlet respirable dust levels were lower than the airborne fine dust levels in the towns where those farms are located. No significant difference was observed in the inhalable dust levels among the years examined, but the respirable dust level in 2017 (0.143 mg/㎥) was significantly lower than in 2002 (0.328 mg/㎥). The level of endotoxin in inhalable dust was significantly higher in 2017 (722 EU/㎥) than in both 2002 (75 EU/㎥) and 2012 (171 EU/㎥). Conclusion: Even though no apparent contribution from swine farm indoor dust to nearby ambient air dust was observed in terms of amount, a certain control strategy to reduce the production of airborne dust and endotoxin from swine farms is merited.

• Safety and Health at Work
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• 제13권2호
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• pp.248-254
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• 2022

Background: Occupational hazards in crop farms vary diversely based on different field operations as soil management, harvesting processes, pesticide, or fertilizer application. We aimed at evaluating the immunological status of crop farmers, as limited systematic investigations on immune alteration involved with crop farming have been reported yet. Methods: Immunological parameters including plasma immunoglobulin level, major peripheral immune cells distribution, and level of cytokine production from activated T cell were conducted. Nineteen grape orchard, 48 onion open-field, and 21 rose greenhouse farmers were participated. Results: Significantly low proportion of natural killer (NK) cell, a core cell for innate immunity, was revealed in the grape farmers (19.8±3.3%) in comparison to the onion farmers (26.4±3.1%) and the rose farmers (26.9±2.5%), whereas cytotoxic T lymphocyte proportion was lower in the grape and the onion farmers than the rose farmers. The proportion of NKT cell, an immune cell implicated with allergic response, was significantly higher in the grape (2.3±0.3%) and the onion (1.6±0.8%) farmers compared with the rose farmers (1.0±0.4%). A significantly decreased interferon-gamma:interleukin-13 ratio was observed from ex vivo stimulated peripheral blood mononuclear cells of grape farmers compared with the other two groups. The grape farmers revealed the lowest levels of plasma IgG1 and IgG4, and their plasma IgE level was not significantly different from that of the onion or the rose farmers. Conclusion: Our finding suggests the high vulnerability of workplace-mediated allergic immunity in grape orchard farmers followed by open-field onion farmers and then the rose greenhouse farmers.