• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2005.11a
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• pp.488-491
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• 2005

This paper has been proposed an engine oil changing system automatically using artificial intelligence. As you know, It is very difficult to forecast the time that exchange engine oil exactly. Because, It does not necessary to change the engine oil when color of engine is black or distance is more than 3000 km. In order to forecast to optimal engine oil replacement time, We must to consider color of engine oil, greasy, mad condition, quick starting condition and quick braking condition. Therefore, in this paper, to overcome those problems, we, developed an expert system that it can forecast to exchange time of engine oil automatically using fuzzy rules and neural networks.

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2004.10a
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• pp.97-97
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• 2004

• Journal of the korean Society of Automotive Engineers
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• v.9 no.4
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• pp.77-85
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• 1987

본 논문은 단기통 4사이클 전기점화기관에서 가스교환 과정이 체적효율에 미치는 영향에 대하여 연구한 것이다. 가스교환 과정의 수학적 모델을 설정하고 수치해석을 수행한 결과 체적효율은 가스교환과정과 관련되는 밸브 개폐시기(1,2)보다는 흡배기관의 압력에 의하여 더 큰 영향을 받는 다는 것을 알 수 있었다. 실험에 있어서는 각각 밸브 개폐시기가 다른 3종류의 캠을 사용하였 으며 수치 해석결과와 실험결고가 비교적 잘 일치하였다.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.42 no.4
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• pp.15-20
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• 2005

If we can forecast the replacement time of engine oil, we extend the life-time of our engine and increase the continued ratio. But, the replacement times of engine oil is influenced by the following elements: the distance that cars or vehicles travel, vehicles that run a short range, types of engine oil etc. that run a long distance. In this paper, We forecast engine oil replacement times by using fuzzy neural network algorithm. This algerian uses the data of distance covered, color of engine oil etc. Through a sequence of simulation, the exchange system of intelligence style engine oil decides on the replacement times of engine oil quite accurately. Therefore, We expect vehicles to become more convenient if the above algorithm is a lied to the present types of cars.

• 전기의세계
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• v.55 no.11
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• pp.37-42
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• 2006

• Korea lubricating oil industries association bulletin
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• no.88
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• pp.8-27
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• 1998

• Applied Chemistry for Engineering
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• v.9 no.3
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• pp.435-439
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• 1998

A new series of ion separation membrane materials based on pheonoxy and trifluoroethoxy co-substituted polyphosphazene has been designed and synthesized. The polymers were characterized by $^{31}P$ NMR, FT-IR spectroscopy, elemental analysis, and get permeation chromatography. The basic phosphazene membranes were sulfonated to obtain better hydrophilicity and ion-selectivity. The membrane from $[NP(OC_6H_4SO_3H)_{1.58}(OCH_2CF_3)_{0.42}]_n$ gave excellent values of ion transport number, area resistivity, and also ion exchange capacity, compared with the commercial membranes.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.340-342
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• 2013

VHF는 선박의 입출항을 위한 정보 제공 교환 및 안전항해에 크게 기여하고 있다고 할 수 있다. 반면에 VHF 통화는 상대방에게 자신의 의사를 제대로 표시하지 못할 경우 더 위급한 상황이 발생할 수 있으며, 규정된 항법에 따라 조기에 피항조치를 취할 시기를 놓칠 수 있다. 이 글은 해양사고 사례를 통해 해양사고 예방을 위한 VHF의 적절한 사용 필요성을 제시하고 있다.

• Journal of the Korean Chemical Society
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• v.25 no.5
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• pp.300-305
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• 1981

The soy bean oil cakes and perillar oil cakes are phosphorylated and sulfonated to be used as ion exchangers. There 40-60mesh cations exchanges have bean tested on the capacity of ion exchange, the adsorption and distribution coefficients of several metal ions in various concentrations of binary solution mixture, hydrochloric acid and alcohol. From there experiments, the following results are concluded. The ion exchange capacity of ion exchangers are higher than 4 meq/g. The adsorption of metal ions on ion exchangers are increased generally as pH is increased, especially Co(II) on sulfonated soy bean oil cake. The distribution coefficients of various metal ions are decreased as the number of branches of carbon and hydroxyl groups are increased. There show that the stereo-isomerism of alkyl group or attraction of ligand have influenced upon various metal ions. Consequently it is deduced that there ion exchanges from soy bean oil cake and perillar oil cake resemble in properties to current ion exchangers.

• Defense and Technology
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• no.4 s.230
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• pp.48-55
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• 1998

군용 활성탄은 모든 독성 작용제에 방호가 가능하도록 만들어져 있다. 따라서 각 개인은 어느 상황에서도 살수 있다는 확신을 가지고 규정에 따른 보호장비 착용을 숙달해야겠다. 그리고 지휘관은 충분한 보장력을 가진 보호장비에 대하여 지속적으로 교육시키고 만일의 사태에는 화학장교의 조언에 따라 그 교환시기 등을 적절히 판단하여 부대의 전투력을 보존해야 겠다