• 한국건설관리학회논문집
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• 제14권1호
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• pp.63-70
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• 2013

주택재개발사업에서 수익성 예측은 성공적인 사업의 수행을 위한 중요한 요소이기 때문에 수익성 예측을 소홀히 할 경우 많은 그에 따른 리스크가 커지게 된다. 그러나 현행 주택재개발사업은 사업이 많이 진행된 시점에서 수익성을 분석하기 때문에, 수익성이 없는 것으로 판단될 경우 그에 따른 큰 손실을 감수해야 한다. 이로 인해 현재 사업이 중단되거나 지연됨에 따라 경제적인 손실을 보는 사업장이 늘어나고 있으며, 그에 따른 이해관계자간 갈등이 심화되고 있다. 주택재개발사업 시 이러한 사회적 갈등과 경제적 손실을 줄이기 위해서는 사업추진여부를 결정하기 위한 적절한 수익성 예측 방법의 개발이 필요하며, 더불어 적절한 시기에 적용할 수 있는 프로세스의 제시가 요구된다. 본 연구는 사업 초기단계인 기획단계에서 수익성을 예측할 수 있는 방법을 제시하여, 합리적이고 타당한 의사결정의 지원을 위한 것으로 본 연구모델의 적용 시 사업 초기단계에 사업 수행 여부의 결정이 가능하도록 하여, 부적절한 사업의 무리한 진행으로 인한 경제적인 손실과 그에 따른 이해관계자간의 갈등을 줄일 수 있을 것으로 판단된다.

• 한국식품위생안전성학회지
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• 제27권1호
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• pp.1-17
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• 2012

T-2 toxin and HT-2 toxin, belong to type A trichothecences, are the most toxic mycotoxins among the trichothecene family. These mycotoxins are commonly found in cereals such as maize, wheat, barley, oats and rice, and their occurrence in food can be of concern. This review investigated the current trends of patents and researches on T-2 toxin and HT-2 toxin pertaining to natural occurrence, toxicity, metabolism, risk assessment, analytical and screening methods, and reduction/detoxification techniques. As compared with other $Fusarium$ mycotoxins, there are limited data for natural occurrence and risk assessment, and regulatory limit and official analytical methods on T-2 toxin and HT-2 toxin in domestic and foreign countries. In particular, selective deacetylation at the C3 and/or C4 positions of T-2 toxin by carboxyesterase present in foods was reported to cause the disappearance of T-2 and the extremely high HT-2 recoveries. Currently, regulatory limits for T-2 and HT-2 are under discussion in EU. For enforcement purposes it is essential to have available precise and reliable analytical methods applicable at the regulatory levels for the T-2 toxin and HT-2 toxin and relevant commodities. In addition, a further study on natural occurrence, risk assessment and reduction/detoxification techniques will be recommended.

• 분석과학
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• 제32권5호
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• pp.196-209
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• 2019

As a traditional method to apply fingerprint powder, brush method ("dusting") can create a risk to the health of crime scene investigators due to the inhalation toxicity of harmful and fine powders. Therefore, as a new method of applying powders, we tried to evaluate the potential of a chamber method for the development of latent fingerprint using fans in a closed chamber with a fixed capacity that can prevent the powders from being blown outside and exposed to the users, by comparing with the development results of the conventional brush method. Fingerprints on glass and plastic (PET) were extracted with black powder and green fluorescent powder, and the sharpness and minutiae of the developed fingerprints were compared for each method. The results of the black powder showed similar results, but the effect of the chamber method was slightly decreased when the green fluorescent powder was used. In order to improve the development with the green fluorescent powder, the mixture (50 : 50) of the fluorescent powder with the silica gel was tested and the results were similar to those of the brush method. It is expected that the chamber method has a high potential as a new powder application method considering the health of the crime scene investigator after fine tuning of development conditions with additional studies.

• 한국지리정보학회지
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• 제14권3호
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• pp.68-77
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• 2011

인구와 시설이 밀집되어 있는 도시지역은 대규모 재해가 발생하는 경우 엄청난 대규모의 피해가 발생 할 수 있으므로 재난에 대한 사후처리뿐 아니라 위험지역을 사전에 파악하고 위험을 저감하기 위한 대책 수립이 필요하다. 현재까지 지역안전도에 대한 많은 연구가 진행되어 왔으나, 나라별, 도시별 특성이 다를 수 있기 때문에 도시지역 특성을 반영한 표준화된 평가기법 및 지표의 개발이 필요하다. 본 연구에서 제시한 지역안전도 평가 모형은 위험 항목별 요인들을 조합한 위험도에 저감성을 고려한 것으로 홍수 위험에 미치는 3가지 요인과 저감성에 영향을 미치는 2가지 요인들을 선정하고, 이들을 대표할 수 있는 12개 인자를 선정한 후 GIS를 이용하여 인자별 평가결과의 가중 합을 통한 중첩으로 지역안전도평가 모형을 제안하였다. 제안된 지역안전도 평가모형을 이용하여 서울시에 대하여 모형의 시범적용을 수행하였다.

• 비파괴검사학회지
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• 제34권4호
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• pp.311-317
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• 2014

가압경수로형 원자력발전소 소유자 그룹은 ASME Sec. XI 코드의 배관 샘플링검사법 대안으로 리스크 정보를 활용한 가동중검사 프로그램(RI-ISI)을 개발 및 적용하였다. RI-ISI 프로그램은 파손 메커니즘이 있는 고위험도 배관에 검사를 집중함으로써 발전소의 전반적인 안정성을 향상시켰다. 또한, RI-ISI 프로그램은 비파괴검사 물량, 검사자 방사선 피폭, 검사 시간 등을 줄일 수 있다. 배관 RI-ISI 방법은 한국 표준형 원자력 발전소 3개호기에 적용되고 있으며 다른 발전소도 개발중에 있다. 이 논문에서는 프라마톰형(프랑스형) 원전에 대한 RI-ISI 방법을 연구하고 그 결과를 나타내었다. 프라마톰형 원전에 대한 RI-ISI 적용은 발전소 안전성을 향상시키고 유지시키며 계량화할 수 없는 이익을 준다는 결론에 도달하였다.

• Journal of Preventive Medicine and Public Health
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• 제35권3호
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• pp.255-262
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• 2002

Objectives : To investigate the fetal cholesterol levels and related factors in a rural adult population. Methods : 3,207 adults(1,272 men and 1,935 women) were examined in 1997 Their heights, weights, and fasting serum total cholesterol levels were measured, and their body mass indices were calculated. A questionnaire interviewing method was used to collect risk factor data. Results : The mean value of total cholesterol were 190.5 mg/dl, and 198.8 mg/dl, and the age-adjusted prevalence rates for hypercholesterolemia (above 240 mg/dl) were 13.7% and 10.2%, in men and women, respectively. From simple analyses, age, educational level, coffee intake, amount of meat and food intake, waist circumference, waist-hip circumference ratio(WHR), and body mass index(BMI) were significant risk factors in men (p<0.05) relating to serum total cholesterol levels. In women, age, educational level, hypertension history, diabetes history, herbal drug history, amount of feed intake, alcohol consumption, waist circumference, WHR, BMI, and menopausal status were significant risk factors (p<0.05). In multiple linear regression analyses, waist circumference (p<0.01), BMI (p<0.01), and coffee intake (p<0.05) proved to be significant risk factors in men. Whereas, menopausal status (p<0.01), BMI (p<0.01), herbal drug history (p<0.01), amount of food intake (p<0.05), waist circumference (p<0.05), and alcohol consumption (p<0.05) were significant risk factors in women. Conclusions : The significant risk factors, for both men and women, relating to the serum total cholesterol were waist circumference and BMI. Thus, for the reduction of serum total cholesterol level, it is recommended that health education for the control of obesity should be implemented.

• 한국안전학회지
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• 제31권4호
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• pp.156-163
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• 2016

There exists required safety integrity level (SIL) to assure safety in accordance with international standards for every electrical / electronics / control equipment or systems with safety related functions. The SIL is allocated from lowest level (level 0) to highest level (level 4). In order to guarantee certain safety level that is internationally acceptable, application of methodology for SIL allocation and demonstration based on related international standards is required. However, the theoretical and practical study for safety integrity level is barely under way in the domestic railway industry. This research studied not only the global process of SIL allocation to guarantee safety in accordance with international standards for safety related equipment and system, but the quantitative methodology based on international standard and the semi-quantitative methodology as alternative way for SIL allocation. Specifically, the systematic SIL allocation for platform screen door system of railway is studied applying the semi-quantitative methodology in order to save much time and effort compared to quantitative method.

• 한방재활의학과학회지
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• 제30권4호
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• pp.65-77
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• 2020

Objectives This study is aimed to evaluate the effectiveness of Chuna therapy for spondylolisthesis. Methods We searched th following 10 online databases without a language restriction (National Digital Science Library [NDSL], Research Information Sharing Service [RISS], Oriental Medicine Advanced Searching Integrated System [OASIS], KMBASE, MEDLINE/PubMed, Cochrane library, Ebscohost, EMBASE, Ovid, China National Knowledge Infrastru [CNKI]) to find randomized controlled trials that used Chuna therapy for spondylolisthesis. The methodological quality of each randomized controlled clinical trial was assessed using the Cochrane risk of bias tool and meta-analyses were perfomed. Results Eleven randomized controlled trials were included. Chuna therapy showed statistically significant reduction of symptoms. Meta-analysis showed positive results for Chuna therapy for spondylolisthesis in terms of therapeutic effects to traction, chinese medicine, therapeutic exercise. Conclusion In this study, we reviewed studies about Chuna therapy used for spondylolisthesis. The studies showed that Chuna therapy can significantly effective on spondylolisthesis. But according to Cochrane risk of bias evaluation method, most of the studies's risk of bias were unclear. Therefore, more high-quality studies will be needed.

• Geomechanics and Engineering
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• 제21권3호
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• pp.289-300
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• 2020

Estimating the damage induced by an explosion around a blast hole has always been a challenging issue in geotechnical engineering. It is difficult to determine an exact dimension for damage zone since many parameters are involved in the formation of failures, and there are some uncertainties lying in these parameters. Thus, the present study adopted a probabilistic approach towards this problem. First, a reliability model of the problem was established and the failure probability of induced damage was calculated. Then, the corresponding exceedance risk curve was developed indicating the relation between the failure probability and the cracked zone radius. The obtained risk curve indicated that the failure probability drops dramatically by increasing the cracked zone radius so that the probability of exceedance for any crack length greater than 4.5 m is less than 5%. Moreover, the effect of each parameter involved in the probability of failure, including blast hole radius, explosive density, detonation velocity, and tensile strength of the rock, was evaluated by using a sensitivity analysis. Finally, the impact of the decoupling ratio on the reduction of failures was investigated and the location of its maximum influence was demonstrated around the blast point.

• 한국농공학회논문집
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• 제61권1호
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• pp.21-29
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• 2019

This study analyzed the variability of drought risk based on trend analysis of dry-seasonal dam inflow located in upper river basins. To this, we used areal averaged precipitation and dam inflow of three upper river dams such as Soyang dam, Chungju dam, and Andong dam. We employed Mann-Kendall trend analysis and change point detection method to identify the significant trends and changing point in time series. Our results showed that significant decreasing trends (95% confidence interval) in dry-seasonal runoff rates (= dam inflow/precipitation) in three-dam basins. We investigated potential causes of decreasing runoff rates trends using changes in potential evapotranspiration (PET) and precipitation indices. However, there were no clear relation among changes in runoff rates, PET, and precipitation indices. Runoff rate reduction in the three dams may increase the risk of dam operational management and long-term water resource planning. Therefore, it will be necessary to perform a multilateral analysis to better understand decreasing runoff rates.