• The KIPS Transactions:PartC
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• v.9C no.2
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• pp.221-226
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• 2002

Cycling Packet Dropping mechanism we proposed in this paper adaptively drops packets, as predicting traffic pattern between each cycle. Therfore the proposed mechanism makes up for the drawback of RIO mechanism and minimizes errors being capable of predicting in Dynamic and Strict Packet Dropping mechanism. And we executed a simulation and analyzed the throughput and packet drop rate based on the Sending Drop Precedence changing dynamically depending on the network traffic. The results show that the proposed mechanism provides better performance on drop precedence levels and stricter drop precedence policy for AF class.

• The KIPS Transactions:PartC
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• v.9C no.5
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• pp.783-788
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• 2002

Adaptive Cyclic Packet Dropping algorithm (ACPD), and Non-adaptive Cyclic Packet Dropping algorithm (NCPD) are applying stricter drop precedence than that of RIO algorithm. Especially, the ACPD algorithm drops adaptively packets for the congestion control, as predicting traffic pattern between each cycle. Therefore the ACPD algorithm makes up for the drawback of RIO algorithm and minimizes the wastes of the bandwidth being capable of predicting in the NCPD algorithm. And we executed a simulation and analyzed the throughput and packet drop rate based on Sending Priority changing dynamically depending on network traffic. In this algorithm, applying strict drop precedence policy, we get better performance on priority levels. The results show that the proposed algorithms may provide more efficient and stricter drop precedence policy as compared to RIO independent of traffic load. The ACPD algorithm can provide better performance on priority levels and keep stricter drop policy than RIO and the NCPD algorithm.

• Clean Technology
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• v.29 no.1
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• pp.1-9
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• 2023

Waste explosives such as useless ammunition discharged from the military and coproduced useless explosives during the manufacturers production process have been continuously produced. These are difficult to dispose with normal waste treatment facilities due to the dangers of fire and explosion. An open burning or an open detonation at military designated disposal facilities is a classical treatment method for the dangerous explosives. The classical method raises various environmental problems by the emission of hazardous materials. An air pollution by the emission of hazardous gases such as SO_x and NO_x, soil and water contaminations by the accumulation of non-biodegradable heavy metals, are representative pollution examples. To overcome these problems, various processes for eco-friendly waste treatment methods have been developed, and some processes have already been operated in some countries. In the current report, various eco-friendly disposal processes for waste explosives or harmful materials, and their advantages and disadvantages are documented to suggest future development directions for reducing the hazardous substances by the treatment processes.

• Korean Journal of Soil Science and Fertilizer
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• v.31 no.1
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• pp.46-50
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• 1998

This study was conducted with pot experiment to find out the effect of ginkgo leaf wastes application produced from the pharmaceutical process on the growth and yield of red pepper. Four kinds of ginkgo leaf wastes, the natural dried leaves, the leaves produced from the pharmaceutical process, the dried leaves to remove methanol after the pharmaceutical process, and the leaves washed with water to removal methanol and some activated materials after pharmaceutical process, were treated with two levels of application rates. The growth responses and yield were measured throughout the experimented period. Shoot growth of red pepper was inhibited by all treatment of ginkgo leaf wastes compared to the treatment of NPK and NPK+compost. Red pepper yields were also significantly reduced by treatment of the ginkgo leaf wastes except for the treatment of the water washed ginkgo leaf wastes, 1,000 kg/10a, which showed similar yield to NPK treatment. The major reseon to reduce the growth and yield seemed to be originated from the allelopathic substances of the ginkgo leaves. The organic matter contents of the soil after experiment were slightly increased with the treatment of the ginkgo leaf wastes and compost than that of NPK treatment. Based on these results, this study for using the ginkgo leaf wastes should be done more to utilize the wastes of the pharmaceutical process as a organic fertilizer.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2004.06a
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• pp.117-118
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• 2004

국내 TRIGA Mark II&III 및 우라늄 변환시설 해체시 다량의 금속폐기물 발생이 예상되며, 현재 이러한 저준위 방사성 금속폐기물을 처리, 재활용하는 기술들에 대한 연구가 국$\cdot$내외적으로 활발히 수행 중에 있다. 이에 본 연구에서는 해체시 발생하는 금속폐기물의 효율적인 감용 및 재활용에 관한 국내외 처리 기술을 검토하여 국내 TRIGA Mark II&III 및 우라늄 변환시설에서 발생하는 해체 금속폐기물의 처리 방안을 수립하기 위한 정보를 제공하고자 한다.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.38 no.11
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• pp.1-8
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• 2001

Adaptive and Strict Packet Dropping mechanism we proposed in this paper drops adaptively packets for the congestion control, as predicting traffic pattern between each cycle. Therefore the proposed mechanism makes up for the drawback of RIO mechanism and minimizes the wastes of the bandwidth being capable of predicting in Dynamic and Strict Packet Dropping (DSPD) mechanism. And we executed a simulation and analyzed the throughput and packet drop rate based on the Sending Drop Precedence changing dynamically depending on the network traffic and compared RIO and the DSPD. The results show that the proposed mechanism provides better performance on drop precedence levels and stricter drop precedence policy for AF class than RIO and the DSPD mechanism.

• Korean Journal of Soil Science and Fertilizer
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• v.30 no.4
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• pp.341-344
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• 1997

To check the possibility to use the pharmaceutical by product of ginkgo leaf for the improvement soil fertility, a pot experiment was conducted with paddy rice. There were three treatment; NPK alone, NPK+7000kg(air dry)/ha of ginkgo leaf waste and NPK+700 kg of water-washed ginkgo leaf waste (air dry)/ha. The result indicated that the application of ginkgo leaf waste severely retarded the growth of rice. Water washing did reduce the severity of retardation, but the water washed ginkgo leaf waste also retarded the growth of rice significantly. The result of this study suggested that ginkgo leaf waste may contain some growth inhibiting substance.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.39 no.2
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• pp.59-68
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• 2002

In this paper, we compared and analyzed two new models of cyclic packet dropping algorithm, Adaptive Cyclic Packet Dropping algorithm (ACPD), and Non-adaptive Cyclic Packet Dropping algorithm (NCPD) with RIO. The ACPD algorithm drops adaptively packets for the congestion control, as predicting traffic pattern between each cycle. Therefore the ACPD algorithm makes up for the drawback of RIO algorithm and minimizes the wastes of the bandwidth being capable of predicting in the NCPD algorithm. We modelled two cyclic packet drop algorithms and executed a simulation and analyzed the throughput and packet drop rate based on Sending Priority changing dynamically depending on network traffic. In this algorithm, applying the strict drop precedence policy, we get better performance on priority levels. The results show that two new algorithms may provide more efficient and stricter drop precedence policy as compared to RIO independent of traffic load. The ACPD algorithm can provide better performance on priority levels and keep stricter drop policy than other algorithms.

• Journal of Korean Society of Archives and Records Management
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• v.15 no.4
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• pp.7-24
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• 2015

Destruction appraisal system improved with the enactment of the 1999 Public Records Management Act has the strategic concepts to prevent loss of important records with prohibiting the destruction in creation organization of records. But destruction appraisal carried out in record center realistically has the big difference with destruction appraisal system intended by Public Records Management Act. Therefore this article intends to explore the importance of destruction appraisal system through a review of the record appraisal system, and investigates operation status of destruction appraisal system in record center and operational issues. And it intends to explore scheme for practical application of destruction appraisal system based on actual cases of destruction appraisal which operates as a model.

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.171.1-171.1
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• 2011

폐기물의 처리방법은 중간처리와 최종처리로 구분되며, 중간처리의 방법으로는 고형화, 생물학적 처리(소화), 화학적 처리(중화/침전/추출), 자원화 및 재활용, 소각/열분해용융/가스화 등이 있다. 최종처리 방법으로는 매립, 해양투기 등이 있으며, 과거에는 폐기물의 처리 방법으로 최종처리가 많이 이용되었으나 현재에는 지속가능한발전의 이념아래 폐기물의 자원화, 청정에너지의 생산 등을 이유로 전처리 기술이 많이 보급되고 있는 추세이다. 남원시에서 발생되는 생활폐기물은 2010년 통계에 따르면 하루 평균 약 43돈에 이르고 있으며, 매립지의 사용연수를 연장하기 위한 중간처리 방법이 검토되고 있다. 생활폐기물의 가장 일반적인 중간처리 방법으로는 소각, 열분해용융, 가스화 등이 적용될 수 있으며, 이와 같은 열적처리는 폐기물의 감용 및 감량 효율이 높은 중간처리 방법에 속한다. 이러한 열적처리를 위해서는 폐기물의 물리적 특성에 대한 조사 및 검토가 가장 먼저 선행되어야 하며, 본 연구에서는 남원시에서 발생되는 생활폐기물의 성상분류, 삼성분분석, 원소분석, 발열량분석 결과를 통해 가스화에 적합한 전처리 조건을 예측하였다.