• Nuclear Engineering and Technology
• /
• 제54권6호
• /
• pp.2230-2243
• /
• 2022

The tin tailing processing industry in Malaysia has operated with minimal regard and awareness for material management and working environment safety, impacting the environment and workers in aspects of radiation and heavy metal exposure. RIA was conducted where environmental samples were analyzed, revealing concentrations of ²²⁶Ra, ²³²Th and ⁴⁰K between the range of 0.1-10.0, 0.0-25.7, and 0.1-5.8 Bq/g respectively, resulting in the AED exceeding UNCEAR recommended value and regulation limit enforced by AELB (1 mSv/y). Ra_eq calculated indicates that samples collected pose a significant threat to human health from gamma-ray exposure. Assessment of heavy metal content via pollution indices of soil and sediment showed significant contamination and enrichment from processing activities conducted. As and Fe were two of the highest metals exposed both via soil ingestion with an average of 4.6 × 10^-3 mg/kg-day and 1.4 × 10^-4 mg/kg-day, and dermal contact with an average of 5.6 × 10^-4 mg/kg-day and 6.0 × 10^-4. mg/kg-day respectively. Exposure via accidental ingestion of soil and sediment could potentially cause adverse non-carcinogenic and carcinogenic health effect towards workers in the industry. Correlation analysis indicates the presence of a relationship between the concentration of NORM and trace elements.

• 비파괴검사학회지
• /
• 제27권6호
• /
• pp.483-500
• /
• 2007

Emerging sensor-based structural health monitoring (SHM) technology can play an important role in inspecting and securing the safety of aging civil infrastructure, a worldwide problem. However, implementation of SHM in civil infrastructure faces a significant challenge due to the lack of suitable sensors and reliable methods for interpreting sensor data. This paper reviews recent efforts and advances made in addressing this challenge, with example sensor hardware and software developed in the author's research center. It is proposed to integrate real-time continuous monitoring using on structure sensors for global structural integrity evaluation with targeted NDE inspection for local damage assessment.

• Journal of Nutrition and Health
• /
• 제47권5호
• /
• pp.374-384
• /
• 2014

Purpose: Health professionals and policy makers confront the failure of provider-administered, conventional behavioral interventions in the fight against obesity epidemic. The aim of this study was to develop a tailored, cost-effective delivery system for a child obesity prevention and management program through technology convergence using Web-enabled smart cellular phones. Methods: Assessment of service needs and development of a delivery system for the program were based on a comprehensive literature review and expert reviews, and results from in-depth interviews and a need-assessment survey. Results: The user- and site-centered service delivery system using Web-enabled cellular telephones as the hardware platform for obesity prevention and management has been developed. A tailored informational service and intervention will be provided interactively between stakeholders through the platform. The potential legal issues associated with the service design have also been considered. Conclusion: The user-centered convergence design and platform based on principles of Transtheoretical Model and Stages of Change using the Health Promoting School framework could enable effective intervention and promote acceptance in the long-run.

• 지역사회간호학회지
• /
• 제28권4호
• /
• pp.513-523
• /
• 2017

Purpose: We evaluated the psychometric properties of a questionnaire on the acceptance of the quality improvement information system (QIIS) among long-term care workers (mostly nurses). Methods: The questionnaire composes of 21 preliminary questions with 5 domains based on the Technology Acceptance Model and related literature reviews. We developed a prototype web-based comprehensive resident assessment system, and collected data from 126 subjects at 75 long-term care facilities and hospitals, who used the system and responded to the questionnaire. A priori factor structure was developed using an exploratory factor analysis and validated by a confirmatory factor analysis; its reliability was also evaluated. Results: A total of 16 items were yielded, and 5 factors were extracted from the explanatory factor analysis: Usage Intention, Perceived Usefulness, Perceived Ease of Use, Social Influence, and Innovative Characteristics. The five-factor structure model had a good fit (Tucker-Lewis index [TLI]=.976; comparative fit index [CFI]=.969; standardized root mean squared residual [SRMR]=.052; root mean square error of approximation [RMSEA]=.048), and the items were internally consistent(Cronbach's ${\alpha}=.91$). Conclusion: The questionnaire was valid and reliable to measure the technology acceptance of QIIS among long-term care workers, using the prototype.

• 한국환경복원기술학회지
• /
• 제19권6호
• /
• pp.111-121
• /
• 2016

This study was carried out to assess the riparian vegetation health in the fluctuation area and vicinity of reservoirs. The results of this study could be a basic data to improve the ecological function and establish green-network of waterside ecosystem. The study site is Daecheong lake reservoirs which the representative landscape of Geum river and with great number of visitors near metropolitan city. The 6 survey plots of 2 survey area were selected, survey area 1 had 4 survey plots and survey area 2 had 2 survey plots, and to compare the study results 4 control plots were selected in Gyeongcheon reservoir. The main dominant specie of survey sites was Salix koreensis in tree and subtree layer, were Salix koreensis and Salix glandulosa. in shrub layer. 2 survey plots of Samjeongdong and Kyeongcheon reservoir were assessed as 'Good', 2 survey plots of chudong were assessed as 'Fair' in vegetation health assessment. In the fluctuation area from flood water level to low water level, 58 populations of Salix koreensis were found in survey sites and Salix koreensis, Salix glandulosa and Acer tataricum subsp. ginale were found in control sites. The most adequate species at the condition affected by inundation impacts would be Salix koreensis and Salix glandulosa was more healthy at the area less affected by inundation. This study was carried out the vegetation health assessment on Daecheong reservoir which has been advanced natural succession for more than 30 years after the construction. Further, it should carry continuously out the research on the planting model of the waterside ecosystem for ecological restoration.

• 생태와환경
• /
• 제40권4호
• /
• pp.560-568
• /
• 2007

The objectives of this study were to analyze ecological effects on effluents from the Sagok Stream (Chonnam province) as an abandoned mine drainage through necropsy-based health assessments and fish exposure tests, and to conduct In situ field pilot tests for restoration of stream water. Also, we analyzed water quality including general parameters and heavy metals. The tests were performed three times on April 2005, April 2006, and April 2007. Also, we constructed a reactor facility in the outflowing point of the abandoned mine for the remediation of AMD wastewater. In lab test, death rates in all three treatments were ${\geq}50%$ in the experiments. Necropsybased fish tissue assessments using the Health Assessment Index (HAI), indicated that the most frequently damaged tissue was liver (average: 20.8). Values of Health Assessment Index were lower in the control than any other treatments of T1, T2, and T3 and three treatments showed a distinct toxicity impacts by the AMD. In situ lethal test, concentration of Fe, Al and Zn decreased particularly by 85%, 99% and 94%, respectively through the disposal facility. Values of pH, ranged from 3.1 to 7.0, increased by 2.3 fold (mean=5.1) along with the reduction of metal contents. All fishes in P1 cage died 100% on 3 days later after the experimental setting, while all fishes in the P6 died 100% on 9 days later. Overall, these results evidently provide a key methodology for pilot test using the disposal facility and also clarify the toxicity of AMD once again, so this approach used in the pilot facilities here may reduce the acidic and toxic effects in the abandoned mining drainage.

• International Journal of Advanced Culture Technology
• /
• 제7권2호
• /
• pp.19-27
• /
• 2019

The purpose of this study was to assess mental health and quality of life (QOL) including factors influencing QOL among early North Korean defectors in South Korea. Participants were 151 early North Korean defectors residing in a settlement support center. All measures were self-administered. Unlike refugees living in communities, early defectors did not experience a high rate of mental health problems and reported a good QOL. Psychoticism was the most predictive factor affecting QOL. Findings from this study suggest the importance of mental health assessment and support over time. Psychoticism, significant in explaining QOL of early North Korean defectors, needs early diagnosis and treatment to prevent progression. Mental health issues among refugees may not be evident while they are in a structured, supportive environment. Evaluation and treatment are needed over time.

• 대한예방한의학회지
• /
• 제19권2호
• /
• pp.51-56
• /
• 2015

Objective : We analyzed present condition of cooperative medical care using claims data of HEALTH INSURANCE REVIEW & ASSESSMENT SERVICE form patients treated by Korean-Western cooperative medicine. The study aimed to offer guidelines in selecting disease-related research in developing Korean-Western convergence technology. Method : Based on the patients using Korean medical service, we analyzed claims data of patients using Korean medical service and western medical service from January 2012 to December 2013. We were assigned to the server remotely. With the concept of 'episode of care', we rebuilt claims data and analyzed present condition of cooperative medical usage. Results : We analyzed present condition of cooperative medical care per episode of care. Among outpatients, Low back pain, lumbar region(M5456) was the highest number. Among inpatients, Sciatica due to intervertebral disc disorder(M511) was the highest number. Conclusion : Based on the claims data provided by HEALTH INSURANCE REVIEW & ASSESSMENT SERVICE, we have derived a list of multy frequently disease frequently treated by cooperative medical care by analyzing present condition.

• 분석과학
• /
• 제19권2호
• /
• pp.163-171
• /
• 2006

우리나라 지정폐기물에 함유된 오염물질 분석방법을 제시하기 위해 오니, 폐유, 소각재 등 폐기물 인증표준물질을 확보하여 중금속 종류별 기기별 전처리 방법을 적용 실험하였다. 지정폐기물에 함유된 As, CN, Cd, Cr, Cu, Pb, Hg 7개 항목에 대한 함량시험방법을 제시하였다. 특히, 동일한 전처리 방법이 여러 항목에 적용될 수 있는지를 검토하고, 이들 항목 배출 가능성이 있는 34개 업소 표본사업장을 선정하여 폐기물 시료를 채취하고 제시한 분석방법으로 적용실험을 수행하였다.

• Korean Chemical Engineering Research
• /
• 제58권3호
• /
• pp.325-345
• /
• 2020

본 연구에서는 다매체 퓨가시티 모델을 기반으로 Volatile organic compounds (VOCs) 방지기술의 인체위해성·환경성·경제성 평가를 수행하여 석유화학 산업단지 내 VOCs 저감을 위한 최적가용기법(Best available technology, BAT)을 선정하였다. 다매체 퓨가시티 모델을 이용하여 U-city에 소재한 석유화학 산업단지에서 배출되는 VOCs 중 Benzene, Toluene, Ethylbenzene, Xylene (BTEX)의 다매체 거동 특성과 잔류농도 분포를 예측하였다. 매체 통합 인체위해성 평가 및 민감도 분석을 이용해 BTEX의 물질별 인체위해성을 예측하고 주요 영향 변수를 규명하였으며, 다매체 환경시스템 내 잔류농도 기준의 환경성 평가와 비용-편익 경제성 평가를 수행하여 우수환경관리기법군(BAT군)을 선정하였다. BTEX의 다매체 거동 분석 결과, 토양 매체에서 높은 잔류 분포 특성(60%, 61%, 64%, 63%)을 보였으며, Xylene은 모든 다매체 환경에서 가장 높은 잔류성을 보였다. BAT후보군 중에서 흡수법은 가장 높은 인체위해성을 보여 BAT 선정에서 제외하였으며, 민감도 분석 결과 대기 매체에서의 물질 반감기와 경로별 노출계수가 인체위해성과 높은 상관성이 있는 것으로 판단되었다. 환경성 평가와 비용-편익 경제성 평가를 고려하여, 재생 열산화법, 재생 촉매산화법, 바이오 필터법, UV 산화법, 활성탄 흡착법을 석유화학 산업단지 내 VOCs 저감을 위한 BAT군으로 선정하였으며, 본 연구에서 제시한 매체통합적 접근 방식의 BAT 선정 방법론은 사업장에서 오염물질 저감을 위한 최적의 배출시설 선정과 통합환경관리제도 운영에 기여할 수 있을 것으로 기대된다.