• 방사선산업학회지
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• 제2권3호
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• pp.155-161
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• 2008

A hydraulic scale model was constructed to investigate the characteristics of flows and pollutant transport in laboratory. The distorted hydraulic scale model by assuming Froude similarity was adopted to represent hydrodynamics and dispersion in a river system. The scale model was composed of water reservoir, slope control part, booster pump, distributing plate and main channel. A constructed scale model will be used to present the overall concentration profiles of tracer and a research will be performed to convert the measured values using a hydraulic scale model to real field scale.

• 방사선산업학회지
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• 제2권3호
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• pp.135-140
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• 2008

A field tracer experiment using radioisotope was carried out to investigate the characteristics of a pollutant transport and a determination of the dispersion coefficients in a river system. The dispersion coefficients in the longitudinal and transverse directions were determined by using the measured concentration of a radioisotope. The two-dimensional numerical models were applied to calculate the flow and concentration fields at the experimental site. Several numerical simulations were performed to investigate the effects of the numerical results according to variations of the dispersion coefficients. The calculated concentrations agreed well with the measured ones.

• 한국환경보건학회지
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• 제39권6호
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• pp.522-531
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• 2013

Objectives: A field survey was conducted in a hog-raising industry in order to help develop personal protective equipment for workers which would secure the safety and the health of these workers. The attempt by this study will help enhance safety in the livestock industry and contribute to the advancement of the industry. Method: The study first selected a total of 111 workers from the hog-raising industry as research participants and designed a survey with questions on general characteristics, indoor and outdoor working environments, how the workers would in practice wear or purchase the working clothes, what needs to be improved in these new working clothes, how much the workers would be likely to accept the working clothes and protective equipment, and lastly, conditions of the communicable disease control overgarment. The collected data underwent frequency analysis and cross analysis with SPSS 21.0. Result: The research targets' average age was 50 years. Work efficiency by environmental factor was normal, but all age groups had experience of accidents (79.3%). Major wounded parts were under elbow and under knee. Protective equipment most commonly worn was helmet (83.4%), gloves (98.2%) and boots (99.1%), and satisfaction with them was normal at 3.41. Working clothing most commonly worn was old clothing (31.8%) and everyday wear (17.6%) and satisfaction with it was low. Considering the improvement of working clothing, they required attached pouches, elasticity and deodorization. The acceptability of improved working clothing was high at 69.2%. Conclusion: After problems have been addressed in relevant future research, what has been learned from the concerned study will be referred to as a useful basic reference when the relevant field works to develop high-quality working clothing and protective equipment for workers in the hog-raising industry.

• 한국콘텐츠학회논문지
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• 제8권4호
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• pp.255-263
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• 2008

본 연구는 교육훈련이 기업내부환경과 직무만족에 직접적인 영향을 미친다는 선행연구를 통해 기업내부환경과 직무에 미치는 영향의 중요성을 인식하고, 내부환경요소와 직무만족에 미치는 영향을 구체적으로 분석 보완할 필요가 있다는 데 중점을 두고자 하였다. 여행업 교육훈련에 대한 재정립은 물론 교육훈련에 따른 종업원의 직무만족에 미치는 영향력에 대한 실증적인 분석을 통해 내부환경과 직무만족과의 연관성을 분석 구축하고, 종업원의 잠재능력 개발의 중요성을 인식함과 동시에 직무만족에 도움이 될 수 있는 시사점을 제시하는데 있다. 실증적인 분석결과로 여행업 종업원 교육훈련은 여행업 종업원들의 교육훈련동기와 성취욕구, 능력이 항상 갖추어지고, 여행업체 상사나 동료의 지원 또는 환경 분위기가 조성이 될 때 종업원의 직무만족을 이끌어 낼 수 있는 것으로 나타났다. 향후 여행업체의 조직내부환경 개선은 물론 여행업과 관련정부기관에서도 종업원 교육훈련의 중요성을 인지하고, 교육훈련에 장기적인 투자와 지원으로 적극적인 전문교육훈련체계 실시가 무엇보다도 필수적이라 본다.

• 수산경영론집
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• 제30권2호
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• pp.55-77
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• 1999

As the population grows, the importance of the fishery industry continues to rise. It is therefore vital to support and promote sustainable fishery industry. However, the fishery production has been declining, mainly due to overdevelopment and depletion in fishery resources and stricter limits on development limits caused by growing concerns over the marine environment and ecology. Recently, international activities related to marine environmental and its ecosystems conservation, have been vigorously pursued. The United Nations Convention on The Law of The Sea has stipulated the protection and conservation of the marine environment, and the implementation of fishery resources development, made in harmony with the environment and fishery resources and based upon scientific findings and principles has become important. Accordingly, fishery industry must pay thorough attention to marine ecological and environmental problems and its international fisheries regime. Fisheries development can affect fishery resources, their environment and ecosystems. Adverse ecological effects resulting from fishery resources development practices in general include overdevelopment and incidental development of non target species, physical degradation of seabed habitants and degraduation of water quality. It has now become more important than ever to build up fishery resources development while achieving the conservation of biodiversity and the marine environment, as well as the restoration of destroyed ecosystems. To maintain fishery industry, it is necessary to develop bioeconomic fishery production system and industry policies for the ESSD(environmentally sound and sustainable development) given that maintenance of a favourable marine environment will ensure the fishery resources productivity. These bioeconomic system and policies are necessary to ensure the sustainability and viability of the fishery industry under ESSD fisheries concepts.

• Safety and Health at Work
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• 제11권4호
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• pp.500-508
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• 2020

Background: Research on the status of many chemicals used in the semiconductor industry is needed. The purpose of this study was to describe the overall status of chemical use in the semiconductor industry in Korea and to examine it from a health perspective. Methods: Data on the status of chemical use and safety data sheets at 11 of 12 major semiconductor workplaces in Korea were collected. The number of chemical products and chemical constituents, quantities of chemicals, and trade secret ingredients used, as well as the health hazards were examined. Results: On average, 210 chemical products and 135 chemical constituents were used at the surveyed workplaces. Among all chemical products, 33% (range: 16-56%) contained at least one trade secret ingredient. Most of the trade secret ingredients were used in the photolithography process. Several carcinogens, including sulfuric acid, chromic acid, ethylene oxide, crystalline silica, potassium dichromate, and formaldehyde were also used. Only 29% (39 of 135) of the chemical constituents had occupational exposure limits, and more than 60% had no National Fire Protection Association health, safety, and reactivity ratings. Based on the aforementioned results, this study revealed the following. First, many chemical products and constituents are being used in the semiconductor industry and many products contained trade secret ingredients. Second, many products contained significant amounts of carcinogenic, mutagenic, and reproductive toxicant materials. Conclusion: We conclude that protecting workers in the semiconductor industry against harm from chemical substances will be difficult, due to widespread use of trade secret ingredients and a lack of hazard information. The findings of the status of chemical use and the health and safety risks in semiconductor industry will contribute to epidemiological studies, safe workplace, and worker health protection.

• Animal Bioscience
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• 제36권5호
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• pp.810-817
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• 2023

Objective: The aim was to compare the behavioral response to full separation of cows and calves maintained together for 100 days or 24 h. Methods: Twelve Holstein-Friesian cow-calf pairs were enrolled into either treatment or industry groups (n = 6 cow-calf pairs/group). The treatment cows and calves were maintained on pasture together for 106±8.6 d and temporarily separated twice a day for milking. The Industry cows and their calves, were separated within 24 h postpartum. Triaxial accelerometer neck-mounted sensors were fitted to cows 3 weeks before separation to measure hourly rumination and activity. Before separation, cow and calf behavior was observed by scan sampling for 15 min. During the separation process, frequency of vocalizations and turn arounds were recorded. At separation, cows were moved to an observation pen where behavior was recorded for 3 d. A CCTV camera was used to record video footage of cows within the observation pens and behavior was documented from the videos in 15 min intervals across the 3 d. Results: Before separation, industry calves were more likely to be near their mother than Treatment calves. During the separation process, vocalization and turn around behavior was similar between groups. After full separation, treatment cows vocalized three times more than industry cows. However, the frequency of time spent close to barrier, standing, lying, walking, and eating were similar between industry and treatment cows. Treatment cows had greater rumination duration, and were more active, than industry cows. Conclusion: These findings suggest a similar behavioral response to full calf separation and greater occurrence of vocalizations, from cows maintained in a long-term, pasture-based, cow-calf rearing system when ompared to cows separated within 24 h. However, further work is required to assess the impact of full separation on calf behavior.

• 문화기술의 융합
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• 제9권3호
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• pp.239-247
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• 2023

관광산업은 다른 산업들보다 사회문화 교류의 촉매 작용을 하는 산업으로 경제적, 사회적, 문화적, 그리고 환경적 측면에서 지속 가능 경영에 강한 책임감을 느끼고 있다. 하지만, 일반 기업보다 ESG(Environment Social Governance)에 대한 인식이 낮으며, 현재까지 모기업이 대기업인 곳만 ESG에 관심을 가지고 있다. 그뿐만 아니라, 참여하는 관광기업도 ESG에서 환경(Environment) 분야에만 집중하고 있다. 따라서, 본 연구는 관광학 분야의 ESG 연구 분야 및 현황을 이해하고, 이를 바탕으로 현재 관광학 분야에서 필요한 ESG 연구 분야를 제시하고자 하였다. 본 연구 결과 관광학 분야에서 ESG 발전을 위해 필요한 분야를 다음과 같이 세 분야로 제시하였다. 첫째, 관광산업 분야에서 ESG를 이해하고 발전시키기 위해서는 먼저 다양한 이해관계자 집단들이 생각하는 ESG 경영에 대한 인식조사가 선행되어야 한다. 둘째, 서비스 산업인 관광산업의 특성을 반영한 객관적인 ESG 평가변수가 개발되어야 한다. 마지막으로, WTTC(World Travel & Tourism Council)에서 관광산업 분야에 제시한 GRI(Global Reporting Initiative)공시전략을 바탕으로 ESG 경영 활동을 객관적으로 공시하는 전략기술이 필요하다.

• 한국대기환경학회지
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• 제27권2호
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• pp.214-224
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• 2011

• 한국환경보건학회지
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• 제44권5호
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• pp.421-432
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• 2018

Objectives: In this study, we started to develop an indoor garden integrated IoT solution based on IAQ (indoor air quality) and interconnection with an environmental database for smart management of indoor gardens. The purpose of this study was to develop and apply an integrated solution for customized air purification from an indoor garden through big data analysis using IoT technology. Methods: An IoT-based IAQ monitoring system was established in three households within a new apartment building. Based on real-time and long-term data collected, $PM_{2.5}$, $CO_2$, temperature, and humidity changes were compared to those of indoor garden applications and the analyzed results were indexed. Results As a result of the installation, all three households had no results exceeding the standard for indoor air pollution on average $PM_{2.5}$ and $CO_2$ indices. In the case of indoor garden installation, the IAQ index increased to the "Good" section after the installation, and readings in the "Bad" section shown before the installation disappeared. The comfort index also did not dip into the "Uncomfortable" section, where it had been preinstallation, and significantly lowered the average score from "Uncomfortable for sensitive groups" to "Good". Overall, the IAQ composite index for the generation of installations decreased the "Good" interval, but "Bad" did not appear. Conclusions In this study on developing an integrated solution for IAQ based on IoT indoor gardens, big data was analyzed to determine IAQ and comfort indexes and an IAQ composite index. Through this process, it became understood that it is necessary to monitor IAQ based on IoT.