• Toxicological Research
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• 제13권1_2호
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• pp.49-54
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• 1997

PCBs are classified as B2 (Probable human carcinogen) based on the induction of hepatocellular carcinomas in rats and mice from IRIS (Integrated Risk Information System). About 20 years ago, PCBs were phased out for electrical use in Korea, but PCBs were continuously used in the other field. Lately, there has been increasing concern on possible effects of contaminated soil to the other environment and human health. The purpose of this study is to determine PCBs level in soil at some site and to assess the human exposure doses according to exposure routes for people living within sites which expected to be exposed to PCBs. Pollution level of PCBs on the site was monitored using gas liquid chromatography. To assess the transport of PCBs in soil to plant and to air, various transfer factors(diffusion coefficient, bioconcentration factor etc.) were considered in simple calculations. To calculate the residential exposure doses by routes, some equations were considered using assumption value, which define inhalation, ingestion (soil, plant) and derreal uptake pathway. Computated results will be used as risk assessment information for human health evaluation on contaminated soil.

• Human Ecology Research
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• 제57권1호
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• pp.1-13
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• 2019

Internet-based financial services are being increasingly integrated into consumers' daily lives. Internet-only banks have emerged as a powerful tool accelerating financial inclusion. This study investigates the satisfaction and continuous use intention predictors for Internet-only banks. We employed an extended post-acceptance model and used six antecedent factors that included perceived usefulness, perceived ease of use, privacy risk, functional risk, subjective norms, and network externality. All 351 participants used Internet-only banks and were 20-40 years of age. A self-administration online survey was conducted. SPSS 23.0 analyzed the frequency, description, and multiple regression analysis. The results of current study are as follows. The education, perceived usefulness, perceived ease of use, and network externality positively influenced the satisfaction of Internet-only banks. Privacy risk negatively influenced satisfaction with Internet-only banks. Perceived ease of use, subjective norm, network externality, and satisfaction positively influenced the continuous use intention of Internet-only banks. The results of our study provide a better explanation of important factors that could enhance the understanding of satisfaction and continuous use intention for Internet-only banks. Furthermore, this study extends the antecedent variables to the knowledge of financial services and enlarges the understanding of users' post-adoption behaviors.

• Nuclear Engineering and Technology
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• 제51권5호
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• pp.1307-1313
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• 2019

Recent analysis results with realistic assumptions provide the variability of operator allowable time for the initiation of aggressive cooldown under small break loss of coolant accident or steam generator tube rupture with total failure of high pressure safety injection. We investigated how plant risk may vary depending on the variability of operators' failure probability of timely initiation of aggressive cooldown. Using a probabilistic safety assessment model of a nuclear power plant, we showed that plant risks had a linear relation with the failure probability of aggressive cooldown and could be reduced by up to 10% as aggressive cooldown is more reliably performed. For individual accident management, we found that core damage potential could be gradually reduced by up to 40.49% and 63.84% after a small break loss of coolant accident or a steam generator tube rupture, respectively. Based on the importance of timely initiation of aggressive cooldown by main control room operators within the success criteria, implications for improvement of emergency operating procedures are discussed. We recommend conducting further detailed analyses of aggressive cooldown, commensurate with its importance in reducing risks in nuclear power plants.

• 한방재활의학과학회지
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• 제31권2호
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• pp.25-40
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• 2021

Objectives This study was conducted to analyze the effect of using acupotomy for piriformis muscle syndrome. Methods The databases used for the search were PubMed, Embase, Cochrane library, China National Knowledge Infrastructure (CNKI), Koreanstudies Information Service System (KISS), Research Information Sharing Service (RISS), Oriental Medicine Advanced Searching Integrated System (OASIS), KMbase, and National Digital Science Library (NDSL). The literature was searched using a total of 9 domestic and foreign databases. randomized controlled trial using only acupotomy as an intervention was selected. The selected studies are analyzed the risk of bias through Cochrane risk of bias, and meta-analysis was performed using Revman. Results As a result of meta-analysis of 11 selected studies, acupotomy was more effective than nerve block and acupuncture. In terms of visual analog scale and immediate analgesic effect, acupotomy did not have statistically significant results compared to other treatment methods. meta-analysis of electro-acupuncture and acupotomy showed no significant results. Conclusions When acupotomy is applied as a treatment for piriformis muscle syndrome, it is more effective than nerve block and acupuncture. but most of the studies have been judged as 'unclear' in the risk of bias assessment. Due to characteristics of treatment group and control group's intervention, It is judged that the blinding of the participant was not properly implemented. Therefore, it is considered that high-quality studies are necessary to supplement the problems in the future.

• 한방재활의학과학회지
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• 제34권3호
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• pp.27-41
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• 2024

Objectives This study aims to evaluate the efficacy and safety of electroacupuncture for rotator cuff disorder. Methods We searched nine online databases (PubMed, Embase, Cochrane Library, Chinese Academic Journals, Korean studies Information Service System, Rsearch Information Sharing Service, ScienceON, KMbase, Oriental Medicine Advanced Searching Integrated System) and two related journals up to April 2024 to identify randomized controlled trials that applied electroacupuncture to rotator cuff disorder. Selected studies were analyzed for risk of bias using the Cochrane risk of bias tool, and a meta-analysis was performed with RevMan version 5.4.1. Results Out of 175 studies, eleven randomized controlled trials were selected for final analysis. Most studies showed that electroacupuncture had effect on rotator cuff disorder. In the meta-analysis, electroacupuncture combined with rehabilitation treatment was significantly more effective than rehabilitation treatment alone in improving visual analog scale (p<0.00001). Almost studies did not report any side effects or adverse reactions to electroacupuncture treatment. Conclusions This systematic review suggests that electroacupuncture is an effective treatment for pain management in rotator cuff disorder. However, the lack of adverse effect reporting and a high risk of bias indicate the need for high-quality randomized controlled trials from various countries.

• Toxicological Research
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• 제30권1호
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• pp.39-44
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• 2014

Bisphenol A (BPA) is widely used in the production of polycarbonate plastics, epoxy resins, and food and beverage containers. In the present study, we aimed to investigate the relationship between urinary concentrations of BPA and waist circumference in Korean adults. A total of 1,030 Korean adults (mean age, $44.3{\pm}14.6$ years) were enrolled in the study on the integrated exposure to hazardous materials for safety control, conducted by the Ministry of Food and Drug Safety from 2010 to 2012. Abdominal obesity was defined as having a waist circumference of at least 90 cm and 85 cm for men and women, respectively. The participants were divided into 4 groups according to the urinary BPA concentration quartile. Waist circumference was significantly higher among subjects with a urinary BPA concentration in the highest quartile relative to those in the lowest quartile (p = 0.0071). Linear regression analysis revealed a significant positive association between urinary BPA concentrations and body mass index, body fat, after adjusting for potential confounders. Moreover, subjects with urinary BPA concentrations in the fourth quartile were more likely to be obese compared to those with urinary BPA concentrations in the first quartile (odds ratio, 1.938; 95% CI: 1.314~2.857; p for trend = 0.0106). These findings provide evidence for a positive association between urinary BPA concentration and waist circumference in Korean adults.

• 디지털융복합연구
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• 제11권1호
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• pp.381-388
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• 2013

본 연구는 지역사회 만성정신질환자를 대상으로 건강위험행위와 스트레스생활사건, 정신증상, 병식, 우울간의 관계 및 건강위험행위에 영향을 미치는 요인을 파악하여 효율적인 만성정신질환자의 건강증진프로그램 개발을 위한 기초자료를 마련하고자 시도되었다. 연구의 대상은 D시와 C도에 위치한 정신보건센터와 사회복귀시설을 이용하고 있는 성인 만성정신질환자 255명이며 자료수집기간은 2011년 8월 1일에서 9월 20일까지였다. 수집된 자료는 실수, 백분율, t-test, ANOVA, Pearson 상관계수, 다중회귀분석을 이용하여 분석하였다. 연구결과 성별, 진단명, 스트레스 생활사건, 병식, 우울이 통계적으로 유의한 영향요인으로 나타났으며, 이들 전체 요인들은 만성정신질환자의 건강위험행위를 24% 설명하였다. 따라서 지역사회 만성정신질환자의 성별과 진단을 반영하여 병식교육과 스트레스 및 우울관리를 통해 건강위험행위를 효율적으로 관리할 수 있는 건강증진프로그램이 개발되어야 할 것이다.

• Journal of Radiation Protection and Research
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• 제16권1호
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• pp.53-72
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• 1991

An integrated model is developed in this paper for the performance assessment of high level radioactive waste repository. This integrated model consists of two simple mathematical models. One is a multiple-barrier failure model of the repository system based on constant failure rates which provides source terms to biosphere. The other is a biosphere model which has multiple pathways for radionuclides to reach to human. For the parametric uncertainty and sensitivity analysis for the risk assessment of high level radioactive waste repository, Latin hypercube sampling and rank correlation techniques are applied to this model. The former is cost-effective for large computer programs because it gives smaller error in estimating output distribution even with smaller number of runs compared to crude Monte Carlo technique. The latter is good for generating dependence structure among samples of input parameters. It is also used to find out the most sensitive, or important, parameter groups among given input parameters. The methodology of the mathematical modelling with statistical analysis will provide useful insights to the decision-making of radioactive waste repository selection and future researches related to uncertain and sensitive input parameters.

• 항공우주시스템공학회지
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• 제13권5호
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• pp.57-64
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• 2019

항공전자 시스템은 유지비용 감소 및 운용성능 향상을 위하여 기능을 모듈화, 통합화 설계를 적용한 모듈 통합형 항공 전자 시스템으로 개발 되어지고 있으며, 다양한 임무 제어 수행을 위해서 가상화 기술을 적용한 파티셔닝 운용체제를 적용 하고 있다. 가상화 기술을 적용 할 경우 CPU 처리 부하 분배는 중요한 고려 대상이며, 특히 입출력 처리 시간에 대한 불확실성은 안정성 있는 항공전자 시스템 설계에 있어 위험 요소 중 하나이다. 본 논문에서는 유즈케이스를 통해 입/출력 처리 방식에 따르는 CPU 처리 부하량을 비교 분석하여 공간적/시간적 파티셔닝 예시에 적용함으로써 입/출력 처리 방식의 영향성을 검토하고자 한다.

• 한국언론정보학보
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• 제35권
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• pp.181-210
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• 2006

본 연구는 식품 안전을 둘러싼 위험 상황을 보도하는 언론의 보도 프레임을 추출, 언론이 위험 상황을 위기의 사회 현실로 구축해가는 양상을 분석하는 것을 목적으로 한다. 이를 위해 1989년 삼양라면 우지파동에서 2005년 김치 기생충 알 검출 사건에 이르는 11개 식품안전 사고를 보도한 언론보도 내용을 대상으로 미디어 프레임을 분석, 각 프레임을 이루는 장치를 통해 언론이 위기를 구축해가는 양상을 추적했다. 분석에 사용된 프레임은 책임소재, 갈등, 인간적측면의 부각, 경제적 결과, 도덕성 등 다섯 가지 프레임이었으며, 연구 결과 이들 프레임에는 위기 확산, 책임 소재, 갈등 부각 등의 현저성이 두드러졌다. 특히 각 프레임을 구성하는 행위자는 가해자와 피해자라는 이분법적 대비 구조를 나타냈다. 기사에 등장하는 행위의 주체인 식품업자, 정부 및 해당관청, 소비자, 전문가 등은 이러한 갈등, 혹은 대비 구조의 프레임 안에서 때론 가해자로, 때로는 피해자로 틀짓기 되며 위험의 상황을 확산, 증폭 시키면서 소비자들의 혼란을 야기하고 위기의 사회현실을 구축하는 것으로 나타났다.