• Korean Journal of Environmental Agriculture
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• v.15 no.3
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• pp.282-288
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• 1996

Because of the high water content of the household garbage, it is difficult to compost it. Therefore, this study was conducted to investigate the possibility of using coal fly ash as humidity conditioner for the household garbage composting. The summarized results are as follows : 1. The maximum temperatures were $35^{\circ}C$ in spring, $47^{\circ}C$ in summer, and $43^{\circ}C$ in winter during the composting periods. 2. The mass was reduced to 70.5% after 60 days. The average volume reduced down to 74.7% after 60 days. 3. The seasonal variation of pH values showed a similar tendency and reached 8.5 after 60 days. 4. The water content was reduced at an early stage of composting and not much changed thereafter. It had 49.7% in spring, 33.9% in summer, and 56.5% in winter after 60 days. Ash contents were not much changed during the composting periods. 5. The contents of inorganic compounds were in the range of $0.06{\sim}4.03%$ $P_2O_5$, $0.01{\sim}2.87%$ CaO, $0.18{\sim}1.43%$ MgO, and $0.39{\sim}2.03%$ $K_2O$. Heavy metal contents were in the range of $ND{\sim}14.08$ Hg ${\mu}g/kg$, $ND{\sim}0.80$ Cd mg/kg, $4.99{\sim}28.95$ Cu mg/kg, $ND{\sim}242.62$ Cr mg/kg, $ND{\sim}20.24$ Pb mg/kg, and $ND{\sim}59.87$ Zn mg/kg.

• Journal of the Korea Organic Resources Recycling Association
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• v.9 no.1
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• pp.79-89
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• 2001

Anaerobic Digestion - Thermophilic Oxic Process(ADTOP) has been known to be one way reducing and composting of organic wastes without draining or forming excess sludge. It could be completely performed by the evaporation of water using the bio-energy from the microbial degradation of organic. In the present study the complete treatment of Chinese restaurant wastes was conducted and utility of bio-energy produced from the ADTOP was estimated. Base on results, it could be concluded as follows; 1) chinese restaurant wastes could be completely treated using the TOP without draining or excess sludge. Maximum volumetric loading rate was determined as $55.0kg-garbage/m^3$. Input water was almostly evaporated and 90.5% of carboneous organic wastes was conversed to carbondioxide. 2)The optimum volumetric loading rate which is acceptable to maintain over $55^{\circ}C$ in the anaerobic digester was determined as $45kg-garbage/m^3{\cdot}d$. 3) The optimum HRT was at least over 10 days in order to maintain about $50^{\circ}C$ in the anaerobic digester using bio-energy produced from TOP. Therefore the utilization of bio-energy produced from TOP could be used in the process which had long HRT such as the anaerobic digestion. 4) The efficiency of anaerobic digester rate were over 90% by the ADTOP under the organic loading rate of $1.1kg-COD/m^3{\cdot}d$, 50kg-Chinese restaurant garbage and $250{\ell}/m^3{\cdot}min$ of the aeration rate.

• Journal of the Korean earth science society
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• v.43 no.1
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• pp.224-235
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• 2022

This study aimed to confirm the status of media reports on space hazards using topic modeling analysis of media articles that are related to space hazards for the past 12 years. Therefore, Latent Dirichlet Allocation (LDA) analysis was performed by collecting over 1200 space hazards articles between 2010 and 2021 on solar storm, artificial space objects, and natural space objects from BIGKins news platform. The articles related to solar storm focused on three topics: the effect of solar explosion on satellites; effect of solar explosion on radio communication in Korea, centered on the Korean Space Weather Center; and relationship between aircrew and space radiation. The articles related to artificial space objects focused on three topics: the threat of space garbage to satellite and space stations and the transition of useful objects into space junk; the relationship between space garbage and humanity as shown in movies; and the effort of developed countries for tracking, monitoring, and disposing of space garbage. The articles related to natural space objects focused on two topics: International Space Agency's tracking and monitoring of near-Earth asteroids and the countermeasures of collisions, and the evolution and extinction of dinosaurs and mammals, with a focus on the collisions of asteroids or comets. Therefore, this study confirmed that domestic media play a role in conveying dangers of space hazards and arousing the attention of public using a total of eight themes in various fields such as society and culture, and derived education method and policy on space hazards.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.151-153
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• 2004

점진적 검사점은 페이지 쓰기 보호를 사용하여 검사점에서 변경된 페이지만을 저장한다. 점진적 검사점을 사용하면 검사점 오버헤드가 줄어드는 반면에 프로세스의 메모리 페이지들이 여러 검사점에 걸쳐있기 때문에 오래된 검사점들을 병합하거나 지울 수 없다. 본 논문에서는 점진적 검사점에서 복구와 쓰레기 수집을 위한 효율적인 병합 알고리즘을 제안한다. 제안한 알고리즘으로 점진적 검사점들을 병합하여 복구를 위한 완전 검사점을 만들고 불필요한 검사점들을 지울 수 있다.

• Journal of Korean Society for Atmospheric Environment
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• v.14 no.5
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• pp.499-506
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• 1998

Recently almost wastes except recycled garbage are dumped into landfill site in Korea. Landfills are significant compounds (NMOCS) are produced. NMOCS include reactive volative organic compound (VOC) and hazardous air pollutants. LAEEM (Landfill Air Emissions Estimation Model) developed by Control Technology Center, V.S. EPA is used to estimate a mount of landfill gas from all landfills. As the result, landfill gas 4,121,000 ton, carbon dioxide 2,951,000 ton, methane 1,1120,000 ton are estimated as emissions from all landfills in Korea.

• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.68.4-68
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• 2002

$\textbullet$ This report presents an implementation a set of reusable software components which use of fault-tolerance embedded controller for railway signalling systems. These components can be used in real-time applications without application reprogramming. $\textbullet$ This library runs under VxWorks operating system and is oriented on real-time embedded systems. The library includes fault detection, fault containment, checkpointing and recovery components. $\textbullet$ The library enables to support high-speed response to fault occurrence in application software. Garbage collector together with VxWorks Watchdog provides both dead tasks detection and useless resources removing to avoid an overflow. Control flow...

• Proceedings of the Korean Information Science Society Conference
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• 2007.10a
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• pp.237-238
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• 2007

• Journal of the korean veterinary medical association
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• v.15 no.3
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• pp.149-155
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• 1979

One hundred and fifteen strains of Escherichia coli were isolated' from suckling piglets of sow fed on food-garbage and their hemolytic property on horse red blood cells, necrotizing activity in rabbit skin and inflammatory activity in rabbit intestine by

• Vacuum Magazine
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• v.2 no.4
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• pp.4-8
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• 2015

Recently, plasma technology has been increasingly applied to agriculture and foods. Owing to the three important plasma characteristics which are activation, sterilization, and catalysis, the plasma technology can be properly applied to agriculture, in the other word, to the whole cycle of agriculture from farm to table: seed germination, plant growth, harvest and storage, washing, packaging, transport, in store, household, cooking, garbage, etc. Some representative case studies for plasma activation, sterilization, and catalysis show well that plasma technology can be successfully applied to the whole cycle of agriculture.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.343-345
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• 2002

제한된 환경에서 자바 실행환경을 제공하는 KVM은 마크-회수 방식의 가비지 콜렉터를 사용하고 있다. 그러나 마크-회수 방식은 시간이 지남에 따라 심각한 메모리 단편화 문제로 충분한 메모리 공간이 있음에도 불구하고 프로그램의 실행이 중단되는 문제점을 가지고 있다. 본 논문에서는 단편화 문제의 개선을 위해 단일 링크드 리스트 형태로 구성되어 있던 프리 리스트를 이중 링크드로 구성하고 객체의 크기에 따라 할당 위치를 달리하는 방법을 제안한다. 이를 통하여 단편화 문제가 최소화되어 메모리 낭비를 줄일 수 있음을 실험을 통해 확인하였다.