• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.129-131
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• 2003

The aim of this study is to evaluate the hazard of landslides at Penang, Malaysia, using a Geographic Information System (GIS) and remote sensing. Landslide locations were identified in the study area from interpretation of aerial photographs and field surveys. The topographic and geologic data and satellite image were collected, processed and constructed into a spatial database using GIS and image processing. The used factors that influence landslide occurrence are topographic slope, topographic aspect topographic curv ature and distance from drainage from topographic database, geology and distance from lineament from the geologic database, land use from TM satellite image and vegetation index value from SPOT satellite image. Landslide hazardous area were analysed and mapped using the landslide-occurrence factors by probability - likelihood ratio - method. The results of the analysis were verified using the landslide location data. The validation results showed satisfactory agreement between the hazard map and the existing data on landslide location.

• 한국양봉학회지
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• 제32권4호
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• pp.295-302
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• 2017

Avoidance behavior is an important life history strategy to survive hazardous environment. The experiment was conducted to detect the avoidance tendency of the honeybee Apis mellifera against commonly used pesticides in apple production. Choice test given only 50% sucrose solution and pesticide-mixed sucrose solution as food estimated the avoidance in laboratory. Most of the acaricides and fungicides tested were shown avoided. Among insecticides, honeybee showed strong avoidance to cyhexatine, carbosulfan and fenpyroximate but low to diflubenzuron, tebufenpyrad, and acrinathrin. Avoidance behavior to neonicotinoid insecticides showed bifurcated; highly avoided from thiacloprid, acetamiprid while less avoided from imidacloprid, thiamethoxam and dinotefuran. From the field study, abamectin, fenthion, amitraz and acequinocyl showed highly avoided while fungicide of fenarimol, acaricides of acrinathrin and phosphamidon, IGR insecticide of diflubenzuron, neonicotinoid insecticide of imidacloprid, and carbamate insecticide of carbaryl showed less avoidance in the field. These results partly explained high bee poisoning from carbaryl in apple flowering period, and neonicotinoids during season.

• Journal of Sport and Applied Science
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• 제4권4호
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• pp.27-32
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• 2020

Purpose: This study sought to explore the effects of air pollution on professional sports in South Korea. Research design, data, and methodology: The dependent variable, the number of attendances, was comprised of 2013-2017 K-league, 2015-2017 KBO, 2014-2017 KBL regular season games, resulting in 1,063, 2,121, 810 individual match-level observations, respectively. With the actual data collected from each place across the country, we created a categorical variable which identify the air quality index divided into four categories by K-eco (i.e., good, moderate, unhealthy, hazardous). To analyze data, ANOVA was employed. Results: First, there was a significant group effect on K-league attendance. Second, there was a significant group effect of KBO attendance. Lastly, there was a significant group effect on KBL attendance. Conclusions: Summary of above results showed that each professional sport leagues' attendance was significantly different depending on the levels of air pollution. Implications were also discussed. Keywords: air pollution, sport spectatorship, professional sports.

• 한국분무공학회지
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• 제26권4호
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• pp.163-170
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• 2021

Emergency generators normally use diesel engines. The generators need to conduct weekly no-load operation inspections to ensure stable performance at emergency situations. In particular, the generators with large diesel engines mainly use rectangle type filter substrates. In order to minimize hazardous emissions generated by generators, optimizing the reduction efficiency through CFD analysis of flow characteristics of PM/NO_X reduction system is important. In this study, we analyzed internal flow by CFD, which is difficult to confirm by experimental method. The main factors in our numerical study are the changes of flow uniformity and back pressure. Therefore, changes in flow characteristics were studied according to urea injector locations, selective catalyst reduction (SCR) diffuser angle, and filter porosity.

• 한국항해항만학회지
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• 제41권6호
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• pp.437-444
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• 2017

위험 유해물질(HNS) 유출사고를 대비하기 위하여 본 연구에서는 지역별 산업 집중도를 지수화하여 동향을 파악하기 위해 쓰이는 집중도지수를 활용하여 HNS 사고의 지역별 집중도를 확인하였다. 이는 HNS를 포함한 해양 유출사고 데이터를 바탕으로 HNS 사고 규모 집중도지수와 HNS 사고 빈도 집중도지수를 수치화하여 하나의 값인 HNS 사고 집중도지수를 제시하는 방식이다. 도출된 지역별 HNS 사고집중도 지수값를 바탕으로 울산을 HNS 대비 최우선 지역, 여수, 부산, 태안을 HNS 대비 우선지역, 군산, 목포, 완도, 인천, 통영, 평택, 포항을 HNS 대비 필요지역, 그 밖에 해양유출사고가 발생하지 않은 동해, 보령, 부안, 서귀포, 속초, 제주, 창원을 HNS 대비 지원지역으로 그룹화하여 대비측면의 우선순위를 설정하였다.

• 한국산업보건학회지
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• 제25권4호
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• pp.534-541
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• 2015

Objectives: This study was conducted to evaluate the prevalence rate of multiple chemical sensitivity/idiopathic environmental intolerance(MCS/IEI) among workers in the Gumi industrial complex around the region of accidental release of hydrogen fluoride in 2012. Materials: We evaluated MCS/IEI using the Korean version of the Quick Environmental Exposure and Sensitivity Inventory(QEESI). A total of 535 workers at six manufacturing companies in the Gumi industrial complex were investigated using self-administered questionnaires from February to March 2015. After exclusion of incompletely answered questionnaires, 271 were analyzed. Results: The prevalence rate and proved positive rate of MCS/IEI were 5.9%(16 out of 271) and 3.7%(10 out of 271), respectively. The scores of chemical intolerance, other intolerance, symptom severity and life impact were significantly higher(p<0.05) in females than those of males. In terms of masking index scores, males showed significantly higher(p=0.003) than female. The self-reported MCS/IEI prevalence rate, 7.7%, of workers exposed to hydrogen fluoride in 2012 was higher than no-exposure group(5.6%), but not statistically significant(p=0.815). Conclusions: Although the prevalence rate of MCS/IEI symptoms of workers exposed to hydrogen fluoride gas in 2012 was not significantly higher than no-exposure group, it is necessary to conduct follow-up study on the exposure group of hydrogen fluoride.

• Asian Journal of Atmospheric Environment
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• 제6권3호
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• pp.206-221
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• 2012

Hazardous chemicals can be released from artificial turf used in some school playgrounds. To distinguish between Health risk assessment (HRA) exposure scenarios for this study, the ratio of elementary, middle and high schools was considered before final selection. Considering exposure pathways (inhalational, oral and dermal), media and materials were examined, targeting hazardous chemicals released from artificial turf playground-related products. Upon evaluation, the quantity of infill chips was shown to exceed the domestic product content standard (90 mg/kg) at eight (16%) out of 50 schools. PAHs were shown to exceed standards (10 mg/kg) at two (4%) out of the 50 schools. The excess cancer risk (ECR) of carcinogens was shown to be $1{\times}10^{-6}$ in most users for the worst exposure scenario. In children with pica, who represented the most extreme exposure group, the ECR was expected to be as high as $1{\times}10^{-4}$, showing the low risk level of carcinogens. The hazard index (HI) for individual chemicals was shown to be low, at around 0.1 or less, except for children with pica, according to the mean exposure scenario of artificial turf playground exposure. However, the HI was shown to exceed 1.0 in children with pica. Therefore, no direct health risk was found in using artificial turf playgrounds and urethane flooring tracks for the mean exposure scenario, except in children with pica.

• 대한간호학회지
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• 제39권5호
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• pp.700-708
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• 2009

Purpose: This study was done to test the validity and reliability of the Adolescent Mental Problem Questionnaire (AMPQ) for Korean high school students. Methods: The AMPQ was designed to assess adolescents', mental health status and problem behavior (Ahn, 2006). A methodological study design was used with exploratory factor analysis, Pearson's correlation coefficients, and a fitness of the modified model for validity. Also, Cronbach's alpha coefficients and alternative-form method for reliability were used. AMPQ was tested with a sample of 36,313 high school students. The participants consisted of 18,701 males and 17,612 females. Results: Seven factors were extracted through factor analysis: 'Psychiatric problems', 'Delinquency', 'Academic troubles', 'Family problems', 'Hazardous behavior', 'Harmful circumstance', 'Eating problems'. These factors explained 51.1% of the total variance. The fitness of the modified model was good ($X^2$=38,413.76, Goodness of Fit Index [GFI]=.94, Adjusted Goodness of Fit Index [AGFI]=.93, Comparative Fit Index [CFI]=.95, Root Mean Square Error of Approximation [RMSEA]=.05), and concurrent validity with Korea-Youth Self-Report [K-YSR] was .63. Cronbach's alpha coefficient of the 31 items was .85. Conclusion: The results of present study suggest that the modified AMPQ instrument may be useful for efficiently assessing mental health status and problem behavior in late adolescent, high school students.

• 대한교통학회지
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• 제36권1호
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• pp.51-65
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• 2018

공격운전은 밀착주행과 급감속과 같은 행위로 상대 운전자를 위협하는 고의적인 행동으로 교통사고 발생 가능성이 높은 위험운전이벤트이다. 본 연구에서는 Multi-agent 주행 시뮬레이션 실험을 통해 공격운전 가해자와 피해자의 상호작용을 차량거동형태를 분석하였다. 운전자의 고의적인 공격의지 검지를 위해 주행패턴을 효과적으로 상대 평가할 수 있는 지표(Erratic Driving Index, EDI)를 도출하였다. 기존의 상용차의 디지털운행기록계 자료를 활용한 위험운전 검지기법과 본 연구에서 도출한 EDI를 연계한 공격운전 검지 방법론을 새롭게 개발하였고 활용성을 평가하였다. 공격운전을 억제하고 운전자의 안전운전을 유도하는 운전자 행태 관리를 위해 본 연구의 결과물이 효과적으로 사용될 것으로 기대된다.

• 국제초고층학회논문집
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• 제1권3호
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• pp.181-194
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• 2012

Chile is characterized by the largest seismicity in the world which produces strong earthquakes every $83{\pm}9years$ in the Central part of Chile, where it is located Santiago, the capital of Chile. The short interval between large earthquakes magnitude 8.5 has conditioned the Chilean seismic design practice to achieve almost operational performance level, despite the fact that the Chilean Code declares a scope of life safe performance level. Several Indexes have been widely used throughout the years in Chile to evaluate the structural characteristics of concrete buildings, with the intent to find a correlation between general structural conception and successful seismic performance. The Indexes presented are related only to global response of buildings under earthquake loads and not to the behavior or design of individual elements. A correlation between displacement demand and seismic structural damage is presented, using the index $H_o/T$ and the concrete compressive strain ${\varepsilon}_c$. Also the Chilean seismic design codes pre and post 2010 Maule earthquake are reviewed and the practice in seismic design vs Performance Based Design is presented. Performance Based Design procedures are not included in the Chilean seismic design code for buildings, nevertheless the earthquake experience has shown that the response of the Chilean buildings has been close to operational. This can be attributed to the fact that the drift of most engineered buildings designed in accordance with the Chilean practice falls below 0.5%. It is also known by experience that for frequent and even occasional earthquakes, buildings responded elastically and thus with "fully operational" performance. Taking the above into account, it can be said that, although the "basic objective" of the Chilean code is similar to the SEAOC VISION2000 criteria, the actual performance for normal buildings is closer to the "Essential/Hazardous objective".