• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2007년도 추계 학술논문 발표대회
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• pp.119-123
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• 2007

Recently, the green roofs market is active, but most constructors use former waterproofing method. So there are a lot of problems in the sub-organization of the green roofs system. I studied to use the block panel for the sub-organization of the green roofs system and I tested about the effectiveness of waterproofing, root barrier, drainage, and insulation. I have not found any problems about waterproofing, root barrier, drainage, and insulation in the results. The sub-organization of the green roofs system using the block panel is effective for waterproofing, root barrier, drainage, and insulation. We can apply it to the dried and unified execution technology.

• 한국화재소방학회논문지
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• 제32권4호
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• pp.95-102
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• 2018

본 논문은 "의용소방대 설치 및 운영에 관한 법률"의 제정 및 시행으로 인한 의용소방대 조직의 학술적 개념 변화를 논의하고자 수행되었다. 이를 위해 의용소방대와 관변단체의 정의, 기능, 그리고 구성원의 보상을 관계법령, 지방자치단체 조례, 선행연구자료 등을 이용하여 비교 분석하였다. 연구결과, 의용소방대의 학술적 정의는 관변단체의 정의와 결부시켜 설명할 수 있었으며, 관변단체 중 행정말단조직의 기능을 갖고 있는 것으로 나타났다. 조직 구성원의 보상은 행정말단조직의 대표적인 예인 이 통장이 받고 있는 보상과 거의 흡사하였다. 결론적으로 의용소방대 조직의 학술적 개념이 자원봉사단체에서 관변단체의 행정말단조직으로 변화되었음을 확인하였다. 이 결과는 의용소방대 조직의 학술적 개념을 새로이 정립하는데 기여가 될 것으로 기대된다.

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2016년도 추계 학술발표논문집
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• pp.49-53
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• 2016

• 한국환경보건학회지
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• 제49권1호
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• pp.30-36
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• 2023

Background: Among various pollutants, fine particle (PM_2.5, defined as particle less than 2.5 nm in aerodynamic diameter) shows the most consistent association with adverse health effects. There is scientific evidence documenting a variety of adverse health outcomes due to exposure to PM_2.5. Objectives: This study aims to assess the health benefits of that would be achieved by meeting the World Health Organization's air quality guidelines for PM_2.5 using AirQ+ and BenMAP. Methods: We estimated PM_2.5 related health benefits in Korea from implementing the World Health Organization's air quality guidelines (annual average 5 ㎍/m³ and 10 ㎍/m³) and Korea's National Ambient Air Quality Standard (annual average 15 ㎍/m³). We used World Health Organization's AirQ+ and U.S. Environmental Protection Agency's Environmental Benefits Mapping and Analysis Program. Results: The annual number of avoided PM_2.5 related premature deaths exceeding WHO guideline levels was assessed using both AirQ+ and BenMAP. We estimated that the health benefits of attaining the World Health Organization's air quality guidelines for PM_2.5 (annual average 5 ㎍/m³) would suggest an annual reduction of 26,128 (95% confidence interval [CI]: 17,363~34,024) and 26,853 (95% CI: 18,527~34,944) premature deaths. Conclusions: Our study provided useful information to policy makers and confirms that the reduction of PM_2.5 concentration would result in significant health benefits in Korea.

• International Journal of Computer Science & Network Security
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• 제21권8호
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• pp.1-12
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• 2021

An operation of an organization is currently using a digital environment which opens to potential cyber-attacks. These phenomena become worst as the cyberattack landscape is changing rapidly. The impact of cyber-attacks varies depending on the scope of the organization and the value of assets that need to be protected. It is difficult to assess the damage to an organization from cyberattacks due to a lack of understanding of tools, metrics, and knowledge on the type of attacks and their impacts. Hence, this paper aims to identify domains and sub-domains of cyber-attack taxonomy to facilitate the understanding of cyber-attacks. Four phases are carried in this research: identify existing cyber-attack taxonomy, determine and classify domains and sub-domains of cyber-attack, and construct the enhanced cyber-attack taxonomy. The existing cyber-attack taxonomies are analyzed, domains and sub-domains are selected based on the focus and objectives of the research, and the proposed taxonomy named AVOIDITALS Cyber-attack Taxonomy is constructed. AVOIDITALS consists of 8 domains, 105 sub-domains, 142 sub-sub-domains, and 90 other sub-sub-domains that act as a guideline to assist administrators in determining cyber-attacks through cyber-attacks pattern identification that commonly occurred on digital infrastructure and provide the best prevention method to minimize impact. This research can be further developed in line with the emergence of new types and categories of current cyberattacks and the future.

• 한국산학기술학회논문지
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• 제16권3호
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• pp.1815-1823
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• 2015

본 연구는 지식관리시스템을 도입하여 운영 중인 기업체와 기관들을 대상으로 지식관리시스템의 도입요인이 조직성과에 미치는 영향을 실증적으로 분석하였다. 분석결과 첫째, 조직요인의 하위변수 중 최고책임자의 지원은 조직성과에 영향을 미치는 것으로 분석되었고, 둘째, 지식정보요인의 하위변수인 지식정보의 품질, 지식정보의 신뢰성, 이용편리성은 유의한 영향을 미치는 것으로 나타났으며, 조직요인의 하위변수 중 비전과 목표는 조직성과에 영향을 미치지 않는 변수로 분석되었다. 이와 같은 본 연구의 분석결과는 선행연구 결과와 일치하는 것임을 알 수 있었다. 그러나 핵심전략과 비전의 수립, 비전과 전략의 명확성과 구체성, 지식관리의 필요성, 핵심지식의 규정화 등으로 측정된 비전과 목표는 조직성과에 긍정적인 영향을 미치지 않는 변수로 분석되어 선행연구 결과와는 다르게 분석되었음을 알 수 있었다.

• Nuclear Engineering and Technology
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• 제56권4호
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• pp.1526-1531
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• 2024

¹³¹I is a fission product produced in a nuclear reactor by irradiating tellurium dioxide, with a half-life of 8.02 day. The most important and widely used method for making ¹³¹I is irradiation using a nuclear reactor and post-irradiation followed by dry distillation. The advantage of the dry distillation process is that the process and the equipment are relatively simple, namely TeO₂ (m.p. 750 ℃), which can withstand heating during reactor irradiation. Based on TeO₂ irradiation by neutron following the technique of dry distillation was explained for production of ¹³¹I on a large scale. A dry distillation followed the radioisotope production operation using the 30 MW GA Siwabessy nuclear reactor to meet national demand. TeO₂ targets are 25 and 50 g irradiated for 87-100 h. The resulting ¹³¹I activity is 20.29339-368.50335GBq. According to the requirements imposed on the radionuclide purity of the preparation, the contribution of ¹³¹I training in the resulting preparation was not less than 99.9 %

• 정보관리학회지
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• 제41권1호
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• pp.487-508
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• 2024

본 연구는 공공도서관의 학습조직 특성이 사서의 혁신행동에 미치는 영향을 실증적으로 분석하기 위하여 수행되었다. 이를 위하여 한국의 수도권에 위치한 공공도서관 15곳의 사서 113명을 대상으로 설문조사를 실시하여 도서관의 학습조직 특성과 혁신행동에 대하여 조사하였다. 학습조직 특성과 혁신행동에 대한 다중회귀분석 결과, 학습조직 특성의 하위 요인 중 학습 기회 창출과 학습 체계 구축은 혁신행동의 하위 요인 중 아이디어 구현에 정적(+) 영향을 미치는 것으로 나타났다. 이에 따라 공공도서관들은 사서들의 학습을 위하여 재정적, 비재정적 지원을 강화하고 사서들의 학습을 공유할 수 있는 전자게시판, 회의 등 다양한 체계를 구축할 것을 제안하였다. 이와 함께 학습조직 특성의 하위 요인들은 혁신행동의 하위 요인 중 아이디어 생성과 아이디어 홍보에는 영향을 미치지 않는 것으로 나타나 아이디어 생성과 아이디어 홍보에 영향을 미치는 조직 특성을 밝혀야 할 것으로 나타났다. 본 연구는 공공도서관 사서들의 혁신행동을 강화하는 학습조직 특성의 하위 요인들을 밝혀냈다는 점에서 의의가 있다.

• Animal Bioscience
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• 제35권7호
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• pp.1100-1108
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• 2022

Objective: The objective of this study was to evaluate the effect of waste cooking oil (WCO) addition on ammonia (NH₃) emissions during the composting of dairy cattle manure under two aeration conditions. Methods: The composting tests were conducted using the laboratory-scale composting apparatuses (14 L of inner volume). Three composting treatments (Control, WCO1.5, and WCO3, with WCO added at 0 wt%, 1.5 wt%, and 3 wt% of manure, respectively) were performed in two composting tests: aeration rate during composting was changed from 0.55 to 0.45 L/min in Test 1, and fixed at 0.3 L/min in Test 2, respectively. The NH₃ emitted and nitrogen losses during the composting were analyzed, and the effect of the addition of WCO on NH₃ emissions were evaluated. Results: Both tests indicated that the composting mixture temperature increased while the weight and water content decreased with increasing WCO content of the composting mixtures. On the other hand, the NH₃ emissions and nitrogen loss trends observed during composting in Tests 1 and 2 were different from each other. In Test 1, NH₃ emissions and nitrogen losses during composting increased with increasing WCO contents of the composting samples. Conversely, in Test 2, they decreased as the WCO contents of the samples increased. Conclusion: The WCO addition showed different effect on NH₃ emissions during composting under two aeration conditions: the increase in WCO addition ratio increased the emissions under the higher aeration rate in Test 1, and it decreased the emissions under the lower aeration rate in Test 2. To obtain reduction of NH₃ emissions by adding WCO with the addition ratio ≤3 wt% of the manure, aeration should be considered.

• Archives of Pharmacal Research
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• 제13권1호
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• pp.28-32
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• 1990

Precipitation and purification of amylase secreted by Streptomyces aureofaciens 77 in liquid inorganic salts-starch medium under the optimum conditions were carried out. Ammonium sulphate fractionation was used to precipitate amylase in cell free culture filtrate. (NH/sub 4/)/sub 2/ SO/sub 4/ at a concentration of 50-70% saturation gave the highest enzyme yield. The obtained precipitates were redissolved in phosphate buffer (pH 7.0) and subjected to dialysis. The dialyzed enzyme preparation was applied to DEAE-cellulose column chromatography which resulted in an increase of purification up to 59.48 fold. A further step of purification was done by applying the obtained purified sample to Sephadex-G200 column chromatography which resulted in ann increase of purification up to 73. 92 fold. The results clearly indicated that the isolated amylase from S. aureofaciens 77 was only on type.