• 환경생물
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• 제25권2호
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• pp.149-157
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• 2007

본 연구는 우리나라 서해안에서 월동하는 수조류 군집의 특성 및 환경요인에 따른 분포 특성을 밝히고자 수행되었다. 수조류 군집조사는 10개 지역에서 실시되었으며, 환경요인으로 토지피복도 비율을 측정하였다. 전체 조사지역에서 종 구성은 수면성 오리류가 84%로 가장 높은 비율을 나타냈고, 그 외 잠수성 오리류, 섭금류, 기러기류, 갈매기류 등이 많이 관찰되었다. 가장 높은 우점도를 나타낸 종은 청둥오리(Anas platyrhynchos)였으며 다음으로 가창오리(Anas formosa)가 차지하였다. 비지도 학습법 인공신경회로망인 self-organizing map(SOM)을 이용한 월동 수조류 군집을 유형화 한 결과 수조류 군집은 6개의 그룹으로 구분되었다. 각 그룹은 서식지의 특성에 따라 명확히 구분되어 서식지의 공간특성을 잘 반영해 주었으며, 또한 조사 시기에 따른 군집의 차이도 잘 나타내 주었다.

• 한국안전학회지
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• 제23권6호
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• pp.171-177
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• 2008

As the risk of traffic accidents caused by mists emerged as a social problem, recently safety facilities to be prepared for mists are being actively installed when designing roads. But in some part, the facilities are being installed imprudently without analyzing the extent of occurrences of mists that would increase the risk of traffic accidents and appropriate countermeasures against the occurrences of mists are not being suggested. For that reason, in this study, first questionnaire surveys were executed on road users in order to draw the factors affecting the traffic accidents caused by mists, a mist traffic accident predicting model was developed and an accident seriousness determining model that can determine accident seriousness was developed. In this way, by extracting major factors affecting mist traffic accidents to grasp risk factors in roads to be caused by mists, safety of roads can be enhanced and traffic accidents in road operations can be decreased. As the affecting factors influencing mist traffic accidents, were extracted sightable distances, durations of mists and whether daytime or nighttime as major factors and the plan to install the facilities for the prevention of mist traffic accidents was suggested to prevent the traffic accidents to be caused by those factors and also the plan to operate roads considering sightable distances was suggested to solve the problem of insufficient sightable distances to be caused by mists was suggested. It is judged that the road safety in the areas where mists occur can be improved through foregoing methods.

• 호스피스학술지
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• 제5권2호
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• pp.1-14
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• 2005

The purpose of this study was to promote the popularization of hospice services by providing the information about the influences of hospice training on participants. We compared differences of attitudes toward death between those of pre-training and post-training by use of questionnaire. This study involved 137 volunteers participating in the hospice training held by one hospice center located in K-city. The questionnaire was composed of 46 items, 21 items of general information and 25 items of information about attitudes toward death. We applied Park's translated version(1992), originally distributed by Thorson and Powell(1988), in the assessment of participants' changed attitudes toward death. Participants were asked to fill out the questionnaire before and after the hospice training. The data were analged by frequency. ANOVA t-test, paired t-test. The results were as follows, 1.Pre-training items holding a high rank were 'The subject about the future life after death is distressing'(F=5.20), 'No worry about any occurrences around the body after a funeral'(F=4.75), 'Having little interest in being laid in a coffin after death'(F=4.56); items holding a low rank were 'Having little interest in any occurrences around the body after death'(F=2.22), 'Willing to deal with the aftermath of the death in detail'(F=1.94), 'No fear to have an idea to be cancerous'(F=1.72). 2.Post-training items holding a high rank were 'No fear to be dead as a result of sufferings from long-lasting illness'(F=3.18), 'No fear to have an idea to be cancerous'(F=3.16)', Having little interest in the future life after death'(F=3.09); items holding a low rank were 'Unpleasant to be not able to move after death(F=1.74), 'Distressing not to know about the future life after death'(F=1.61), 'The subject about the future life after death is distressing'(F=1.60). 3.There were significant difference in participants' attitudes toward death. Compared with pretraining(F=3.97), more positive were developed in post training(F=2.30). The results of this study indicate that hospice training renders positive regards toward death to the participants. Therefore every human being, who is able to speculate about the meaning of death, has to be exposed to the hospice training. In conclusion, hospice training should be popularized in the near future.

• Childhood Kidney Diseases
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• 제23권2호
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• pp.100-104
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• 2019

Purpose: Ureteral duplication is a relatively common congenital urinary tract abnormality that can be associated with various clinical problems such as vesicoureteral reflux (VUR), hydronephrosis, and ectopic ureters. The purpose of this study was to analyze the clinical characteristics of pediatric patients with recently diagnosed ureteral duplication and to identify any differences from those described in previous reports. Methods: We retrospectively reviewed the clinical characteristics and course of pediatric patients who were diagnosed with ureteral duplication between January 2008 and June 2017. Results: A total of 32 pediatric patients were diagnosed with ureteral duplication during the study period. The male to female ratio was 1:2.2. Twenty-seven patients (84.4%) were first diagnosed with ureteral duplication at less than 3 months of age, and 26 (81.3%) were first diagnosed by prenatal ultrasonography. Four of the 32 patients were diagnosed with bilateral ureteral duplication, for a total of 36 occurrences of ureteral duplication. In 17 occurrences of complete ureteral duplication (47.2%), other urinary tract anomalies were also found; namely, ureterocele (7), VUR (11), and ectopic ureter (5). However, none of the patients with incomplete ureteral duplication had ureterocele or VUR. Conclusions: With the advent of routine prenatal ultrasound, ureteral duplication is being diagnosed earlier than was previously possible, enabling timely treatment of the various accompanying urinary tract anomalies. Multicenter studies are needed to establish guidelines for standardized evaluation and treatment of ureteral duplication.

• 한국건설안전학회 논문집
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• 제1권1호
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• pp.40-46
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• 2018

소규모 건설 사업장에서는 한 사람이 과도하게 많은 관리영역에 대해서 책임을 져야하므로 특정 영역에 대해 집중적인 관리가 불가능하다. 실제로 이와 같은 소규모 프로젝트는 작은 규모로 인해서 정부의 관리통제에서 면제되고 있는 바, 이는 소규모 건설 현장에서의 안전 관리와 안전 관리에 대한 의식 수준이 낮은 주된 이유 중 하나이다. 정부는 그간 전국적 사고 발생 건수를 줄이기 위해 지속적으로 노력하고 있지만 매년 백여 명이 넘는 근로자가 건설현장에서 사망하고 있다. 이는 그간의 관리방법으로는 일정 수준의 목표를 달성하고자 함에 있어 상당한 한계가 있다는 것을 시사한다. 따라서 본 연구에서 제안한 행동 기반 안전 관리 기법에 기반한 경영 아이디어는 소규모 건설 현장에서의 사고발생을 효과적으로 절감하는데 기여할 수 있을 것으로 기대된다.

• 한국환경과학회지
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• 제30권10호
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• pp.789-802
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• 2021

This study analyzed the characteristics of high PM_2.5 episodes that meets the concentration criteria of Emergency Reduction Measures Plan (ERMP) in Busan during the 2015-2020, and compared with those in Seoul. As a first step, the CAPSS-2017 emission data was employed to analyze the emission differences between Busan and Seoul, and pointed out that Busan emission included the dominance of ship emissions (37.7%) among total PM_2.5 city emissions, whereas fugitive PM_2.5 emission was the highest in Seoul. These emission characteristics are indicating that the controlling action plan should be uniquely applied to cope with ERMP in each region. We selected extremely high PM_2.5 episode days that meet the criteria of ERMP levels. In Busan, Ulsan, and Gyeongnam region, 15, 16, and 8 days of extremely high PM_2.5 cases were found, respectively, whereas Seoul showed approximately doubling of occurrences with 37 cases. However, the occurrences in summer season indicated big differences between two cities: the proportion of summer-season occurrence was 13-25% in Busan, whereas no single case have occurred in Seoul. This is suggesting the needs of comprehensive summer emission reduction plan with focusing on sulfur reduction to effectively cope with the ERMP levels in summer in the southeastern region, including Busan.

• 한국지하수토양환경학회지:지하수토양환경
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• 제26권6호
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• pp.1-17
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• 2021

Self-potential (SP) surveys measure naturally occurring differences in electrical potential in the absence of artificial sources and have been applied to various fields since the first application in mineral explorations. Among various causes of SP occurrences, streaming potential is generated by the flow of groundwater, and makes SP surveys suitable for the exploration of groundwater table fluctuation, fractures, sinkholes and landslide occurrences. Recently, there has been many studies that applied SP surveys to monitor water leakage through dikes and embankments. In this review paper, we first review the characteristics and theoretical backgrounds of streaming potential in saturated or unsaturated porous media to introduce it in the embankment among various application field. After the review of the background theory, we review the past cases of field SP surveys on dikes and embankments and also the characteristics of field streaming potential data in the surveys. Further, by analyzing past studies of qualitative as well as quantitative interpretation of SP survey data, we show the possibility of quantitative interpretation of streaming potential data obtained on dikes and embankments. Consequently, it is hope that this review paper helps researches on SP surveys on dikes and embankments, and provides basis for interpretation methods of the SP data to identify leaked area and further leakage rate (or permeability).

• 대기
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• 제28권4호
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• pp.457-467
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• 2018

This study investigated the variability of spring (March-May) forest fire risk in Korea for the period 1991~2017 and analyzed its relationship with large-scale climate factors. The Forest Weather Index (FWI) representing the meteorological risk for forest fire occurrences calculated based on observational data and its relationship with large-scale climate factors were analyzed. We performed the empirical orthogonal function (EOF) analysis on the spring FWI. The leading EOF mode of FWI accounting for about 70% of total variability was found to be highly correlated with total number of forest fire occurrences in Korea. The high FWI, forest fire occurrence risk, in Korea, is associated with warmer atmosphere temperature in midwest Eurasia-China-Korea peninsula, cyclonic circulation anomaly in northeastern China-Korea peninsula-northwest pacific, westerly wind anomaly in central China-Korea peninsula, and low humidity in Korea. These are further related with warmer sea surface temperature and enhanced outgoing longwave radiation over Western Pacific, which represents a typical condition for a La $Ni\tilde{n}a$ episode. This suggests that large-scale climate factors over East Asia and ENSO could have a significant influence on the occurrence of spring forest fires in Korea.

• Journal of Forest and Environmental Science
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• 제37권1호
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• pp.62-68
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• 2021

Despite numerous efforts on reducing road-kill worldwide, the collisions have been occurring continuously. Many factors are affecting road-kill occurrences and the effect is various by species. We investigated Hydropotes inermis argyropus road-kill characteristics on the national highway. We examined 9,099 H. i. argyropus road-kill points with distance to the gaps on road (interchange and intersection) and distance to six natural land-cover types as explanatory variables. We also examined the number of road-kill occurrences according to temporal variation using chi-square test with 9,658 events. In general, H. i. argyropus road-kill location tended to occur close to the gaps on road, agricultural lands and forests. The average distance from road-kill to the gap was 694.7 m and 78.6% of the collisions were occurred within 1 km from the gaps. In addition, Kruskal-Wallis test showed the distance between road-kill points and each land cover and the gaps was significantly different. The temporal analyses showed that the differences of the H. i. argyropus road-kill frequency are significant in both month and season. Our results implies H. i. argyropus road-kill location tended to occur close to the gaps on road, agricultural lands and forests in general, especially during May and June, according to their seasonal behavior. Thus, we suggest there is a need of concentrated management on the roads with specific characteristics for both wildlife and human safety.

• 식물병연구
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• 제26권4호
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• pp.202-209
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• 2020

유기농업은 지속가능한 농업을 위해서 필요하며, 생물 다양성 유지를 위해 필수적인 경작 방법으로 전 세계적으로 성장하고 있는 농업 분야 중 하나이다. 유기농업은 인류의 건강과 환경에 유해한 영향을 끼질 수 있는 화학적 제재의 사용을 줄이고, 친환경적 동·식물성 비료, 식물 추출물, 미생물 제재 등이 사용되기 때문에 소비자에게 안전한 농산물을 제공할 수 있다. 노지 고추를 대상으로 3년간 유기농업 환경과 관행농업 환경에서 주요 병해 발생과 토양 미생물상의 조사하였다. 토양 미생물상의 차이는 차세대 염기서열 분석 기법을 활용하여 조사하였으며, 유기농업에 사용되는 제제의 종류에 따라 토양 미생물상이 다르게 형성되었다. 바이러스, 탄저병에 대해서는 관행농업에서의 병 발생률이 낮았으나, 청고병은 미생물 제재 사용에 의해 병 발생률이 낮게 나타났다. 미생물 제재를 사용한 토양에서 투입된 미생물이 토양 미생물에서 검출되었으며, 이는 미생물이 실제 토양에 정착했음을 시사한다.