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Ho Jeong Jeong,Hyo Gil Choi,Byoung Yong Moon,Jae Woan Cheong,Nam Jun Kang 한국원예학회 2016 원예과학기술지 Vol.34 No.3
In this study, four cultivars of strawberry commonly grown in South Korea, ‘Daewang’, ‘Seolhyang’, ‘Maehyang’, and ‘Ssanta’, were evaluated for several qualities, including the presence of phytochemicals, sugar content, organic acids, and fruit hardness. The plants were cultivated on a highbench bed system in a plastic greenhouse and drip irrigated. Fruit samples were collected three times in February 2013 to analyze the fruit characteristics. We found that the fruit hardness of the ‘Daewang’, ‘Maehyang’, and ‘Ssanta’ cultivars was greater than that of ‘Seolhyang’, however ‘Seolhyang’ showed the highest moisture content of all the cultivars, indicating that fruit hardness was negatively associated with moisture content. Furthermore, ‘Seolhyang’ was found to have the highest levels of phenolic compounds and anthocyanins compared to the other cultivars. ‘Maehyang’ had the highest amount of total sugars. ‘Seolhyang’ and ‘Maehyang’ accumulated higher amounts of total organic acids. As a result, ‘Daewang’ and ‘Maehyang’ were expected to be preferred by consumers because they had the highest ratio of sugar to total acid in their fruit.
해저면 신호가 약한 천부해저지층 탐사자료의 너울영향 보정
이호영 ( Ho-young Lee ),구남형 ( Nam-hyung Koo ),김원식 ( Won Sik Kim ),김병엽 ( Byoung-yeop Kim ),정순홍 ( Snons Cheong ),김영준 ( Young-jun Kim ),손우현 ( Woo Hyun Son ) 한국지구물리·물리탐사학회 2015 지구물리와 물리탐사 Vol.18 No.4
3.5 kHz 또는 첩(chirp) 천부해저 지층탐사는 해양지질 조사나 엔지니어링 탐사에 널리 사용되고 있다. 그러나 해상에서의 너울은 탐사자료의 품질을 저하시킨다. 이와 같은 너울의 영향을 보정함으로써 연속성이 향상된 탐사자료를 얻을 수 있다. 정확한 해저면의 위치 선정은 너울영향 보정에 매우 중요하다. 이 연구에서는 원자료와 이를 엔벨로프 또는 에너지비율자료로 변형시킨 자료들에 대해 최대 진폭값의 일정 기준을 초과하는 지점을 선정하는 방법으로 해저면 위치 선정을 시도하였다. 그러나 파도의 잡음으로 인하여 해저면 신호가 분명하지 않은 품질이 낮은 자료에서는 개별 트레이스에서의 자동적인 해저면 위치 선정이 어려웠다. 이 연구에서는 이전 트레이스에서 구한 해저면 평균값을 고려하여 해저면 선정범위 내에서 해저면을 선정하는 방법과, 선정 결과의 신뢰도가 낮은 경우에는 이를 보정에서 제외하는 방법을 사용함으로써 품질이 낮은 자료의 해저면 선정에서도 만족스러운 결과를 얻었다. 개별 트레이스에서 해저면을 선정할 때에는 에너지비율자료를 사용한 경우에 오류가 가장 적었으며, 이전 트레이스 해저면 평균값을 고려하는 방법에서는 원자료를 직접 사용한 경우에 보정결과가 비교적 양호하였다. A 3.5 kHz or chirp sub-bottom profiling survey is widely used in the marine geological and engineering purpose exploration. However, swells in the sea degrade the quality of the survey data. The horizontal continuity of profiler data can be enhanced and the quality can be improved by correcting the influence of the swell. Accurate detection of sea bottom location is important in correcting the swell effect. In this study, we tried to pick sea bottom locations by finding the position of crossing a threshold of the maximum value for the raw data and transformed data of envelope or energy ratio. However, in case of the low-quality data where the sea bottom signals are not clear due to sea wave noise, automatic sea bottom detection at the individual traces was not successful. We corrected the mispicks for the low quality data and obtained satisfactory results by picking a sea bottom within a range considering the previous average of sea bottom, and excluding unreliable big-difference picks. In case of trace by trace picking, fewest mispicks were found when using energy ratio data. In case of picking considering the previous average, the correction result was relatively satisfactory when using raw data.
Modeling Human Exposure Levels to Airborne Volatile Organic Compounds by the Hebei Spirit Oil Spill
Jong Ho Kim,Byoung Kyu Kwak,Mina Ha,Hae-Kwan Cheong,Jongheop Yi 환경독성보건학회 2012 환경독성보건학회지 Vol.27 No.-
Objectives: The goal was to model and quantify the atmospheric concentrations of volatile organic compounds (VOCs) as the result of the Hebei Spirit oil spill, and to predict whether the exposure levels were abnormally high or not. Methods: We developed a model for calculating the airborne concentration of VOCs that are produced in an oil spill accident. The model was applied to a practical situation, namely the Hebei Spirit oil spill. The accuracy of the model was verified by comparing the results with previous observation data. The concentrations were compared with the currently used air quality standards. Results: Evaporation was found to be 10- to 1,000-fold higher than the emissions produced from a surrounding industrial complex. The modeled concentrations for benzene failed to meet current labor environmental standards, and the concentration of benzene, toluene, orthometa-para-xylene were higher than the values specified by air quality standards and guideline values on the ocean. The concentrations of total VOCs were much higher than indoor environmental criteria for the entire Taean area for a few days. Conclusions: The extent of airborne exposure was clearly not the same as that for normal conditions.
Jeong, Ho Jeong,Choi, Hyo Gil,Moon, Byoung Yong,Cheong, Jae Woan,Kang, Nam Jun Korean Society of Horticultural Science 2016 원예과학기술지 Vol.34 No.3
In this study, four cultivars of strawberry commonly grown in South Korea, 'Daewang', 'Seolhyang', 'Maehyang', and 'Ssanta', were evaluated for several qualities, including the presence of phytochemicals, sugar content, organic acids, and fruit hardness. The plants were cultivated on a high-bench bed system in a plastic greenhouse and drip irrigated. Fruit samples were collected three times in February 2013 to analyze the fruit characteristics. We found that the fruit hardness of the 'Daewang', 'Maehyang', and 'Ssanta' cultivars was greater than that of 'Seolhyang', however 'Seolhyang' showed the highest moisture content of all the cultivars, indicating that fruit hardness was negatively associated with moisture content. Furthermore, 'Seolhyang' was found to have the highest levels of phenolic compounds and anthocyanins compared to the other cultivars. 'Maehyang' had the highest amount of total sugars. 'Seolhyang' and 'Maehyang' accumulated higher amounts of total organic acids. As a result, 'Daewang' and 'Maehyang' were expected to be preferred by consumers because they had the highest ratio of sugar to total acid in their fruit.
이호영 ( Ho Young Lee ),구남형 ( Nam Hyung Koo ),김원식 ( Won Sik Kim ),김병엽 ( Byoung Yeop Kim ),정순홍 ( Snons Cheong ),김영준 ( Young Jun Kim ) 한국지구물리·물리탐사학회 2013 지구물리와 물리탐사 Vol.16 No.4
해양지질 조사 또는 엔지니어링 목적의 해양 탄성파 탐사에서 해상의 너울로 인하여 탐사자료의 품질이 저하된다. 1 ~ 2 m의 너울은 탐사 중에 종종 발생하는데, 1 m 이내의 정밀도를 요하는 고해상 해저탐사자료에서 이를 보정하여 줌으로써 탄성파 단면도의 수평적 연속성을 높일 수 있다. 이 연구에서는 8채널 고해상 에어건 탐사자료와 3.5 kHz천부지층탐사자료에 대하여 너울영향 보정을 적용하였다. 너울영향을 효율적으로 보정하기 위해서는 탐사자료에 나타나는 해저면의 위치를 정확하게 산출하는 것이 중요하다. 이 연구에서는 해저면 수심값 추출을 위하여 해저면 부근의 최대진폭을 이용하거나 최대진폭값의 일정 기준을 넘어서는 지점을 해저면 위치로 추출하는 방법 등을 사용하였다. 품질이 낮은 자료에 대해서는 수심값 추출이 용이하도록 엔벨로프 또는 해저면 요소파(wavelet) 신호와 상호상관을 수행한 자료를 사용하였다. 이와 같은 방법으로 산출한 수심값으로부터 평균값을 구한 후, 그 차이를 보정하여 주었다. 시험 적용된 에어건 탐사자료에서는 약 0.8 m, 2종의 3.5 kHz 천부지층탐사자료에서는 각각 약 0.5 m와 약 2.0 m 범위의 너울영향을 보정하였다. 자료의 상태에 따라 적절한 해저면 수심값 추출 방법을 사용하여 탐사자료의 너울 영향을 보정함으로써 지층의 연속성이 향상된 고품질의 고해상 해저 탄성파 단면도를 제작할 수 있었다. The seismic data quality of marine geological and engineering survey deteriorates because of the sea swell. We often conduct a marine survey when the swell height is about 1 ~ 2 m. The swell effect correction is required to enhance the horizontal continuity of seismic data and satisfy the resolution less than 1 m. We applied the swell correction to the 8 channel high-resolution airgun seismic data and 3.5 kHz subbottom profiler (SBP) data. The correct sea bottom detection is important for the swell correction. To detect the sea bottom, we used maximum amplitude of seismic signal around the expected sea bottom, and picked the first increasing point larger than threshold value related with the maximum amplitude. To find sea bottom easily in the case of the low quality data, we transformed the input data to envelope data or the cross-correlated data using the sea bottom wavelet. We averaged the picked sea bottom depths and calculated the correction values. The maximum correction of the airgun data was about 0.8 m and the maximum correction of two kinds of 3.5 kHz SBP data was 0.5 m and 2.0 m respectively. We enhanced the continuity of the subsurface layer and produced the high quality seismic section using the proper methods of swell correction.