• Journal of the Korea Institute of Military Science and Technology
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• v.13 no.6
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• pp.1147-1152
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• 2010

This paper reports a safe and environmentally-benign demilitarization method for the K305 35mm CS gas grenades launcher set(also known as E-8 launcher). The launcher system was disposed by a two-step process; complete recovery of the explosive cords and the gas grenades from the launcher followed by incineration of the recovered items in the APE-1236 Flashing Furnace. All of the 64 grenades within the 16 tubes of the E-8 launcher were safely recovered and incinerated. In this study, 32 sets of the launcher were used to make a standard operating procedure for the safe demilitarization of the launcher system and the 35mm CS cartridges were all safely destroyed in the experimental burning tests meeting the related environmental regulations.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1996.04a
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• pp.89-89
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• 1996

CS gas(0-chlorobenzylidene malononitrite)가 우리나라 및 구미 각국에 시위진압과 군 화생방 교육에 널리 사용되고 있다. 이 CS gas는 인체에 자극적인 독성물질로 작용할 수 있다고 알려져 있으나 이비인후과 영역에 미치는 영향에 대하여는 보고가 드물어 CS gas 폭로에 의해 먼저 장애를 입을 것으로 생각되는 기관점막의 구성세포들의 변화를 관찰하기 위하여 실험동물을 사용하여 실험에 임하였다. 실험에 사용되는 실험동물은 150gm 내외의 Sprague-Dawley계 흰쥐로 대조군 5마리, 실험군 24마리를 사용하였으며 실험에 사용한 CS gas는 한영화학 CO.에서 제조한 분말형 CS gas를 사용하였다. 실험방법은 1㎥ 용적의 플라스틱 chamber에 CS분말을 투입한 후 실험동물을 넣어 CS gas를 흡입시킨 후 12시간, 1일, 3일, 5일이 경과한 후 희생시켜 기관점막의 변화를 관찰한 결과 다음과 같은 결과를 얻었다. 1. CS gas 흡입후 12시간이 경과한 흰쥐의 기관은 상피층이 증가되었고 위중층상피가 중층편평상피로 변화되었다. 2. CS gas 흡입후 1일 경과후는 기관상피층이 현저하게 감소되었다. 3. CS gas 흡입후 3일 및 5일 경과후 기관점막은 대조군의 것과 같이 거의 정상화되었다.

• Journal of the Korean Chemical Society
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• v.28 no.1
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• pp.62-69
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• 1984

The reaction of toluene with ethanol was studied over various cation-exchanged pentasil zeolite catalysts. The toluene disproportionation reaction to produce xylenes increased with increasing reaction temperature and the activity of alkylation of toluene with ethanol showed maximum at around $400^{\circ}C$. Only Cs-ZSM-5 catalyst showed pronounced p-ethyltoluene selectivity increasing to 96% with increasing degree of Cs-exchange. The sorption rate of m-xylene was lower for Cs-exchanged ZSM-5 than H-ZSM-5 catalyst. These phenomena were interpreted in terms of shape selectivity arising from the partial blocking of channel intersections by large cesium ions.

• Journal of Energy Engineering
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• v.5 no.1
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• pp.56-64
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• 1996

The objective of this investigation is to establish the rejection characteristics of caesium and cobalt from radioactive liquid waste by chemical/ultrafiltration process. An extensive experimental investigation was conducted with inactive caesium and cobalt ions, utilizing ultrafiltration stirred cell. Caesium and cobalt could be effectively removed from waste solution using copper ferrocyanide and polyarcylic acid(PAA). The rejection dependence of the caesium was found to be a function of caesiun to potassium copper ferrocyanide feed molar ratio. The binding behavior of caesium on K$_2$Cu$_3$(Fe(CN)$\sub$6/)$_2$, particles was explained in terms of a Langmuir adsorption isotherm. When Cs/K$_2$Cu$_3$(Fe(CN)$\sub$6/)$_2$molar ratio was 1.5, the removal of caesium was the most efficient. The rejection efficiency of cobalt is dependent upon various parameters such as pH, cobalt concentration and PAA concentration. The rejection behavior of cobalt was explained in term of a equilibrium model taking into account the reaction between the ligand group, the proton and the cobalt ion. At the conditions of PAA/Co ratio of 2 and pH of 5.6, the removal of cobalt was over 90%. Also, the effect of chemical addition sequence for the simultaneously removal of caesiun and cobalt was discussed.

• Journal of the Korean Chemical Society
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• v.24 no.1
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• pp.1-7
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• 1980

Solvolysis rate constants for methylchloroformate, methylthionochloroformate, methylthiolchloroformate and methyldithiochloroformate have been determined conductometrically in methanol, ethanol and ethanol-water mixtures and activation parameters have been derived. Results show that methylchloroformate solvolyzes through $S_N2$ process while methyldithiochloroformate solvolyzes by $S_N1$ process in all the solvent systems. The rate of hydrolysis decreased in the order, $CH_3S(CS)Cl>CH_3S(CO)Cl>CH_3O(CS)Cl>CH_3O(CO)Cl$ which corresponds to the order of decreasing $S_N1$ character. In methanol, $CH_3S(CS)Cl$ solvolyzed via the $S_N1$ mechanism while the others solvolyzed via the $S_N2$ process. In ethanol, however, $S_N2$ character was dominant for all the compounds, except methyldithiochloroformate, for which $S_N1$ character was still strong enough to accelerate the rate of ethanolysis. In ethanol-water mixtures, $CH_3S(CS)Cl$ and $CH_3S(CS)Cl$ solvolyzed via $S_N2$ process in ethanol-rich region while the $S_N1$ character increased greatly in water-rich region for the solvolysis of these compounds. The order of $S_N1$ character for solvolysis in water-rich region was the same as the order of hydrolysis rate.

• Microbiology and Biotechnology Letters
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• v.9 no.3
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• pp.117-121
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• 1981

Safety of yellow pigment produced by Monascus sp. CS-2 was evaluated. Acute oral toxicity, pyrogen test, and histamine test, as well as antimicrobial activity were determined. The results obtained were; LD oral in mice was 132.5 mg/20 g, pyrogen test in rabbit was 5 mg/kg, and histamine test in cat was 10 mg/kg. Also the pigment was particularly sensitive to Bacillus subtilis (ATCC 6633), Sarcina lutea (ATCC 9341) and Staphylococcus aureus (ATCC 6538 P), whereas not sensitive to Pseudomonas pyosyanea (ACTC 10490), Bacillus var. mycoides (ATCC 11778), Bordetella bronchiseptica (ATCC 4617) and Staphylococcus epidermidis(ATCC 12228).

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.583-586
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• 2016

단백질과 RNA의 상호작용 데이터가 대량으로 늘어남에 따라, 단백질과 RNA의 결합부위를 예측하는 계산학적인 방법들이 많이 개발되고 있다. 하지만, 많은 계산학적인 방법들은 단백질에서 단백질과 RNA 결합부위를 예측한다는 한계점이 있었다. 본 논문에서는 RNA와 단백질의 서열정보를 모두 사용하여, 단백질과 결합하는 RNA 결합부위를 예측하는 기법과 그 결과를 논한다. WEKA random forest(http://www.cs.waikato.ac.nz/ml/weka/)를 이용하여 예측 모델을 개발하였고, RNA 서열의 서열 프로파일, 서열 composition, 결합 상대방의 단백질의 특성 등을 특정으로 표현하였다. Random forest 기법을 사용한 cross validation의 결과로서 1:1 모델에서 제일 높은 성능인 92.4% sensitivity, 92.0% specificity, 92.2% accuracy를 보였고, independent test에서는 72.5% sensitivity, 90.0% specificity, 2.1% accuracy를 보였다.

• Journal of Convergence for Information Technology
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• v.10 no.6
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• pp.164-176
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• 2020

Efficient production of antigen specific cytotoxic T cells is critical for appropriate adoptive immune response. In vitro culture and expansion of human T lymphocyte clones are very sophisticated and subtle procedure in immune cell therapy and hard to control. Therefore, many groups devoted their efforts to manipulate artificial antigen presenting cells (aAPCs) that can induce T cell activation and clonal expansion. To mimicking of natural antigen-presenting cells, aAPCs encompass basic signal molecules required for T cell activation: MHC:antigen complexes, co-stimulatory molecules and soluble immune modulating molecules. Orchestrated organization of these molecules is important for efficient T cell activation. Here, we discuss how those molecules have been incorporated in several aAPC models, but also how physical properties od aAPC are important for interaction with T cells.

• Journal of Convergence for Information Technology
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• v.7 no.1
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• pp.67-73
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• 2017

Paper sludge ash, blast furnace slag, fine powder quicklime, anhydrous gypsum, and fly ash as the main ingredients were prepared to suit the salty soils of marine soils. The solidification component is a kind of recycled ceramic, and CaO plays an important role in solidification. The neutralization time after solidification was about 2 weeks, and the compressive strength was about 12N/mm2 in the mortar test after one week incubation with standard yarn. This is about 14 times stronger than the solidifying agent used in the metropolitan area. As a result of applying plate load test to saltous marine soils, we obtained the yield load that can pass the large scale even after 5 days. In the uniaxial compressive strength test, shear strength of about 300 kPa was obtained after 5 days. It will be useful for supplementing the soft ground in the area where marine reclamation is much like the Incheon area.

• Journal of Convergence for Information Technology
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• v.7 no.3
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• pp.153-158
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• 2017

The certification for Smart Factory supoort successful management of organization while providing strategic plans to the issue of manufacturing process. In Korea, these standards are prepared as the national standards since 2015, and also, there are actions being taken to adpot the certification for Smart Factory. However, to adopt such certification, it is required that the certification operation system needs to be organized, as well as that the society in general should understand about Smart Factory. Accordingly, it is even more required an review on the adoption of the system. This study has the purpose in surveying a variety of atakeholders' perception for the adoption of Smart Factory certification given the circumstance that the cetitification is implemented through literature review and in-depth interviews. This study will be provide significant implication to build a successful plan for the adoption of Smart Factory certification by reviewing perception of professional and problem, strategy of this certification.