• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 The 6th International Symposium of East Asian Resources Recycling Technology
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• pp.230-235
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• 2001

There are more than 15 millions cars or motors in Taiwan. According to the statistics from Environmental Protection Administration, the number of resulting scrap tires are near 110 thousand tons each year. The tire recycle programs in Taiwan were first conducted in 1989 and executed by ROC Scrap Tire Foundation. However, the current efficiency of the tire recycling industry still needs to be improved to minimize the environmental problem or fire hazards caused by scrap tires storage. Ten major tire-recycling factories are surveyed in this study. The investigations include the source of scrap tire, the shredding process, the market of products, the management of wastes disposal, and the difficulties of these sectors. As the varieties of the shredding machines of the recycle factories, there are three kinds of final products which include powder, granular, and chips. The wastes, wires and fibers, produced by the shredding process are the major problems fur all the factories. The percentage of the wire and fiber removal from rubbers still needs to be increased. The best approaches found in this study to increase the efficiency of scrap tire recycling processes are proposed which include the improvement of magnetic separation system fiber/rubber separation system and the minimization of waste disposal. A categorized standard of the processing outputs is suggested as a reference for the decision-making of the tire-recycling factories.

• Nutritional Sciences
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• 제5권2호
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• pp.103-110
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• 2002

In Korea, the school foodservice program has been expanding rapidly in recent years, partly as a result of increased government support. With the growth in the number of schools offering foodservice programs, food safety and sanitation concerns have been increasing. To assist with program improvement, a situation analysis was carried out, with the focus on equipment and sanitary management of school foodservice programs under flour different management systems. A questionnaire was mailed to the foodservice directors of 234 randomly selected schools chi[h included elementary, middle and high schools at the national level. Among them, one hundred and sixty-five responses reasonably completed were used for the analysis. This study classified each school's foodservice management into one of four types : independent-conventional, independent-commissary, contract-conventional, and contract-delivery. The results show that the monitoring of employees' health and personal hygiene, and employees' sanitary education was well conducted, but that the sanitary education of the voluntary parent workers was largely ignored. Eighty-six percent of the schools had their drinking water tested for sanitation, and the results showed that more effort is needed in careful management of drinking water in order to prevent foodborne illnesses and bacillary dysentery. In general, contract management showed lower scores in foodservice equipment and their efficiency, compared with independent management. A relatively high number of schools on the contract-delivery management system employed nurses and leachers instead of dietitians and foodservice directors. The adoption of the HACCP (Hazard Analysis Critical Control Point) system was lowest in contract-conventional and contract-delivery management systems, and highest in elementary schools using the independent-conventional system.

• 한국안전학회지
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• 제34권3호
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• pp.36-41
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• 2019

As the prefabricated shoring system structure, which is a temporary structure, is often collapsed due to various reasons during concrete pouring, and directly affects not only the safety of the workers but also the quality of the final building, it is necessary to ensure the safety. It is considered that the pipe supports which are widely used as the prefabricated shoring materials in the construction site do not satisfy the performance criteria in many cases. Therefore, this study investigated the detailed conditions for satisfying the performance criteria and suggested the factors for improving the quality control level in order to prevent collapse accidents due to pipe supports reused at the construction site, As the results of test in order to understand the effect of the pipe supports (V2), which are being reused in the field, on the performance by factor, the performance was evaluated to be high in case of the small female screw clearance and the supporting pin with 12mm in diameter or larger.

• Journal of Dairy Science and Biotechnology
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• 제32권1호
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• pp.55-62
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• 2014

본 연구는 국내 기능성 축산식품 관리제도 도입과 관련하여, 이를 반영하기 위한 기능성 물질(성분)의 과학적 분석기술 및 기능성 축산물별 검사방법 등 세부관리기준과 인증 방안을 마련하여 시행규칙을 제안하고자 한다. 기능성 축산식품을 관리하기 위한 새로운 법률 개정에 발맞추어 기능성 물질(성분)의 효용성(efficacy)과 안전성(safety)을 확인(검증)할 수 있는 분석 평가기술의 재정립을 통하여, 기능성 식품의 분석 평가 현황을 파악하고, 축산식품을 위한 기능성 물질의 범위를 정하여 이에 부합하는 표준검사법을 확립하고, 표준화를 제안한다. 본 연구를 통해 그 동안 우리나라에서 건강지향식품들의 지속적 노력에도 불구하고, 질적인 발전을 이루지 못한 과거의 문제점을 해결하여, 합리적인 관리체계 안에서 안전하고 우수한 품질을 갖는 기능성 축산식품을 제조 판매하는데 이바지 하며, 소비자의 건강증진은 물론 잘못된 건강기능식품의 섭취로 인한 피해를 방지하고자 한다.

• 전자공학회논문지SC
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• 제48권5호
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• pp.74-80
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• 2011

본 연구는 유통되는 이식형(implantable) 의료기기의 추적(tracking) 및 회수(recall) 처리를 신속하고 정확하게 수행할 수 있는 통합 전산 관리시스템 설계하는 것을 목적으로 한다. 이를 위해 최신 FDA 규정을 만족하는 시스템을 MSF/CD 설계방법론을 기반으로 설계하였다. 추적과 회수의 주요한 4가지 가상 시나리오를 설정하고 workflow diagram을 작성하여 개념설계하였다. 또한 business workflow를 만족하는 서버의 논리 DB를 개발하여 논리설계 단계까지 시스템을 설계하였다. 제안된 시스템으로 이식형 의료기기의 심각한 부작용 등 문제 발생 시 신속하고 정확한 추적과 회수 처리가 가능하여 이식형 의료기기를 장착한 환자의 생명유지 및 국민 건강 보호를 위한 정부 차원의 효율적인 관리가 가능할 것으로 사료된다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권3호
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• pp.974-992
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• 2021

Recently, the healthcare field has undergone rapid changes owing to the accumulation of health big data and the development of machine learning. Data mining research in the field of healthcare has different characteristics from those of other data analyses, such as the structural complexity of the medical data, requirement for medical expertise, and security of personal medical information. Various methods have been implemented to address these issues, including the machine learning model and cloud platform. However, the machine learning model presents the problem of opaque result interpretation, and the cloud platform requires more in-depth research on security and efficiency. To address these issues, this paper presents a recent technology for Internet-of-Things-based (IoT-based) health big data processing. We present a cloud-based IoT health platform and health big data processing technology that reduces the medical data management costs and enhances safety. We also present a data mining technology for health-risk prediction, which is the core of healthcare. Finally, we propose a study using explainable artificial intelligence that enhances the reliability and transparency of the decision-making system, which is called the black box model owing to its lack of transparency.

• Journal of Preventive Medicine and Public Health
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• 제45권1호
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• pp.1-7
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• 2012

Using three Austrian case studies, the variegated applications of molecular typing in today's public health laboratories are discussed to help illustrate preventive management strategies relying on DNA subtyping. DNA macrorestriction analysis by pulsed field gel electrophoresis has become the gold standard for subtyping of food borne pathogens like listeria, salmonella, campylobacter and Bacillus cereus. Using a Salmonella Mbandaka outbreak from the year 2010 as example, it is shown how the comparison of patterns from human isolates, food isolates, animal isolates and feed isolates can allow to identify and confirm a source of disease. An epidemiological connection between the simultaneous occurrence of tuberculosis in cattle and deer with cases of human tuberculosis due to Mycobacterium caprae in 2010 was excluded using mycobacterial interspersed repetitive units variable-number tandem repeats subtyping. Also in 2010, multilocus sequence typing with nonselective housekeeping genes, the so-called sequence based typing protocol, was used to elucidate connections between an environmental source (a hospital drinking water system) and a case of legionellosis. During the last decades, molecular typing has evolved to become a routine tool in the daily work of public health laboratories. The challenge is now no longer to simply type microorganisms, but to type them in a way that allows for data exchange between public health laboratories all over the world.

• 한국산업보건학회지
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• 제28권2호
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• pp.166-174
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• 2018

Objectives: This study aimed to estimate the number and proportion of target workplaces for work environment monitoring and evaluate the implementation rate of work environment monitoring. Methods: A questionnaire survey was conducted by the Ministry of Employment and Labor between March and May 2017 among 96,295 manufacturing businesses with more than five employees. The response rate was 17.8%. Estimates of the number and proportion of target workplaces for work environment monitoring were calculated as follows: number of workplaces where work environment monitoring was performed in 2016 + exposure rate based on the questionnaire * number of workplaces where work environment monitoring was not conducted. Results: Of the 150,655 total manufacturing businesses with more than five employees, 63,146 are estimated to be subject to work environment monitoring, which accounted for 41.9% of the workplaces. It is estimated that 73.3% of the target workplaces performed work environment monitoring. The number of workers exposed to hazardous substances is estimated to be about 0.7~1.2 million. Conclusions: Information on the distribution of workplaces subject to work environment monitoring and the rate of implementation can be used as baseline information for management and evaluation of the effectiveness of the work environment monitoring system.

• 한국산업보건학회지
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• 제25권1호
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• pp.58-71
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• 2015

Objectives: The aims of this study were to investigate the classification system of chemical substances in the Occupational Safety and Health Act(OSHA) and Chemical Substances Control Act(CSCA) and to compare several health indices (i.e., Time Weighted Average (TWA), Lethal Dose ($LD_{50}$), and Lethal Concentration ($LC_{50}$) of chemical substances by categories in each law. Methods: The chemicals regulated by each law were classified by the specific categories provided in the respective law; seven categories for OSHA (chemicals with OELs, chemicals prohibited from manufacturing, etc., chemicals requiring approval, chemicals kept below permissible limits, chemicals requiring workplace monitoring, chemicals requiring special management, and chemicals requiring special heath diagnosis) and five categories from the CSCA(poisonous substances, permitted substances, restricted substances, prohibited substances, and substances requiring preparation for accidents). Information on physicochemical properties, health indices including CMR characteristics, $LD_{50}$ and $LD_{50}$ were searched from the homepages of the Korean Occupational and Safety Agency and the National Institute of Environmental Research, etc. Statistical analysis was conducted for comparison between TWA and health index for each category. Results: The number of chemicals based on CAS numbers was different from the numbers of series of chemicals listed in each law because of repeat listings due to different names (e.g., glycol monoethylether vs. 2-ethoxy ethanol) and grouping of different chemicals under the same serial number(i.e., five different benzidine-related chemicals were categorized under one serial number(06-4-13) as prohibited substances under the CSCA). A total of 722 chemicals and 995 chemicals were listed at the OSHA and its sub-regulations and CSCA and its sub-regulations, respectively. Among these, 36.8% based on OSHA chemicals and 26.7% based on CSCA chemicals were regulated simultaneously through both laws. The correlation coefficients between TWA and $LC_{50}$ and between TWA and $LD_{50}$, were 0.641 and 0.506, respectively. The geometric mean values of TWA calculated by each category in both laws have no tendency according to category. The patterns of cumulative graph for TWA, $LD_{50}$, $LC_{50}$ were similar to the chemicals regulated by OHSA and CCSA, but their median values were lower for CCSA regulated chemicals than OSHA regulated chemicals. The GM of carcinogenic chemicals under the OSHA was significantly lower than non-CMR chemicals($2.21mg/m^3$ vs $5.69mg/m^3$, p=0.006), while there was no significant difference in CSCA chemicals($0.85mg/m^3$ vs $1.04mg/m^3$, p=0.448). $LC_{50}$ showed no significant difference between carcinogens, mutagens, reproductive toxic chemicals and non-CMR chemicals in both laws' regulated chemicals, while there was a difference between carcinogens and non-CMR chemicals in $LD_{50}$ of the CSCA. Conclusions: This study found that there was no specific tendency or significant difference in health indicessuch TWA, $LD_{50}$ and $LC_{50}$ in subcategories of chemicals as classified by the Ministry of Labor and Employment and the Ministry of Environment. Considering the background and the purpose of each law, collaboration for harmonization in chemical categorizing and regulation is necessary.

• 한국재난정보학회 논문집
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• 제19권4호
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• pp.834-843
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• 2023

연구목적: 중대시민재해의 대상은 공중이용시설, 공중교통수단, 그리고 원료·제조물로 구성된다. 중대재해처벌법에 따르면 중대시민재해를 관리하기 위하여 대상 시설물 등에 대한 안전보건관리체계와 이행체계가 구성되어야 한다. 이에 따라 본 연구는 안전보건관리체계와 이행체계를 효율적으로 관리하는 모델을 설계하는 것을 목적으로 한다. 연구방법: 중대재해처벌법 시행령 8조-11조에 이르는 사항에 대한 정보를 시각적이고, 상호 연계되어 모니터링 할 수 있는 구조로 설계한다 . 연구결과: 6개의 모니터링 모듈 체계를 구축하고, 4종의 DB 구조를 통하여 상호 연관되어 정보를 수집하고 관리하는 체계를 제시하였다. 결론: 중대시민재해 관리는 민간, 지자체, 공공기관 등에서 중점적으로 관리해야 하는 체계이다. 특히 다중밀집시설에 해당되는 식당, 커피숍 등 재난에 대한 인식이 부족한 업체와 다양한 유형의 시설을 광범위하고 보유한 지자체의 관리의 어려움으로 6개의 모니터링 모듈 기반으로 제공함으로써, 중대시민재해 정보를 쉽게 관리할 수 있는 기반을 마련하였다.