• Journal of Korean Institute of Industrial Engineers
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• v.17 no.2
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• pp.17-26
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• 1991

This paper discusses an expert system to generate part codes and construct part families, ESPCC, for the group technology application. The ESPCC, that is developed by using VP-Expert rule-based expert system development tool, embodies the specific knowledge of human experts to determine part codes consistent with the OPITZ classification and coding system. The ESPCC is implemented on an IBM compatible personal computers running MS-DOS.

• Journal of Crop Science and Biotechnology
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• v.10 no.2
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• pp.64-72
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• 2007

Iron is an important micronutrient for plants. Iron metabolism is a complex mechanism under a delicate balance. Iron metabolism represents two major problems for plants: deficiency as a consequence of solubility problems and toxicity due to excess solubility in anaerobic conditions. In the last few years, new genes have been discovered that influence iron uptake, transport and storage. Irrigated rice is exposed to high levels of $Fe^{II}$, normally rare in aerobic soil conditions. The implications of altering iron uptake rates and the effects of newly discovered genes are discussed.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.16 no.1
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• pp.64-83
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• 1991

This paper is to design and implement the Korean authoring tool SMAT which is able to generate a high quality instruction software with simple manipulation without a special programming knowledge insurrounding IBM 16/32 bit pc XT/AT.

• BLOOD RESEARCH
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• v.53 no.4
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• pp.267-267
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• 2018

• Bulletin of the Korean Mathematical Society
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• v.59 no.3
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• pp.789-799
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• 2022

We establish a sharp integral inequality related to compact (without boundary) linear Weingarten hypersurfaces (immersed) in a locally symmetric Einstein manifold and we apply it to characterize totally umbilical hypersurfaces and isoparametric hypersurfaces with two distinct principal curvatures, one which is simple, in such an ambient space. Our approach is based on the ideas and techniques introduced by Alías and Meléndez in [4] for the case of hypersurfaces with constant scalar curvature in an Euclidean round sphere.

• Journal of the Korean Chemical Society
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• v.44 no.2
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• pp.115-119
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• 2000

A PVC membrane electrode based on upper-rim calix[4] crown as ionophore was prepared using dioctyl sebacate (DOS) as a plasticizer. The potential response of this membrane electrode to alkali, alka-line earth and transitionmetal metal cations were examined. This membrane electrode exhibited a Nernstian response to $10^{-6}{\sim}10^{-2}M\;Pb(NO_3)_2$ with a slope ot 27.0 mV/decade. Its response time ($t_{90}$) was 10s and it could be used for at least 2 months. Also, the potential was maintained constantly in the rage of ph $2.0{\sim}12$.

• Journal of the Korean Chemical Society
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• v.42 no.5
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• pp.531-538
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• 1998

The ion selective membrane electrode made of calix[4]arene-based host 1 as ionophore, poly (vinyl chloride) (PVC) as matrix and dioctylsebacate (DOS) as a plasticizer was studied. The potential responses of this membrane electrode to alkali, alkaline earth and transition metal cations were investigated. Especially this membrane electrode was turned out to be affinitive for $Pb^{2+}$ in the deionized water. It was observed that the response was linear in the concentration range from $1.0 \times 10^{-1} M to 1.0 \times 10^{-6} M of Pb^{2+}$ and its slope (26.5 mV/decade) was near to the sub-Nernstian response in deionized water. Also, the potential was maintained constantly in the range of pH $4.00 \sim 12.00$, which supports the potential usage as $Pb^{2+}$ affinitive electrode in the deionized water.

• Journal of Korea Society of Industrial Information Systems
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• v.12 no.2
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• pp.1-15
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• 2007

The purpose of this study is to design and develop a mobile game using J2ME, which is currently the most popular choice for game development to understand the process of mobile game development and to develop methods that address weaknesses of J2ME. The development was done with the Eclipse IDE(Integrated Development Environment) tool to simplify mobile game development by removing the need for complex commands and installation processes which are intrinsic to the DOS command Batch file arid J2ME Wireless Toolkit when used for the implementation of java mobile games. Literature was also reviewed on mobile game environments, the structures of J2ME Platform, and past research on mobile games, to investigate which parts of J2ME are important to the characteristics of mobile game development and how to implement these important parts when developing.

• Convergence Security Journal
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• v.6 no.1
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• pp.45-53
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• 2006

It has been proposed that several RFID authentication protocols based on hash chain. Status based authentication protocol and challenge-response based authentication protocol are secured against location tracking attacks, spoofing attacks, replay attacks, traffic analysis attacks but are vulnerable to Dos attacks. RFID authentication protocol with strong resistance against traceability and denial of service attack is secured against location tracking attack, spoofing attacks, replay attacks, DoS attacks but are vulnerable to traffic analysis attacks. The present study suggests a more secure and lightweight RFID authentication protocol which is combining the advantages of hash-chain authentication protocol and RFID authentication protocol with strong resistance against traceability and denial of service attack. The results of the secure analysts for a proposed protocol are illustrated that it is secured against location tracking attacks, spoofing attacks, replay attacks, traffic analysis attacks, Dos attacks and is a lightweight operation between server and tag.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.26 no.8
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• pp.1102-1114
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• 2002

An electret filter is composed of permanently charged electret fibers and is widely used in applications requiring high collection efficiency and low-pressure drop. In this work, the collection efficiency of the filter media used in manufacturing cabin air filters was investigated by using poly-disperse particles when submicron particles were loaded. Long-term experiments were conducted by applying two different charging states, which were spray electrification and charge equilibrium by bipolar ionization. In order to investigate the effect of particle loading in filter media, NaCl particles were generated from 0.1% and 1% solutions by an atomizer. Liquid DOS particles were used to evaluate the effect of liquid particles on the collection efficiency of an electret filter. The results show significant effect of charge amount and size distribution of loading particles on the collection performance of a filter media in submicron region. Smaller particles loaded in electret fibers cause a more rapid degradation in collection efficiency and have lower minimum efficiency with time. The pressure drop of a filter media do rarely increase when the collection efficiency decreases to the minimum value. For the larger particles charged by spray electrification, which have charge amounts more than that of Boltzmann equilibrium charge distribution, the pressure drop of a filter media slowly increases in comparison with that of equilibrium charged particles. For DOS particles it is shown that the charging level of an electret filter severely decreases and the collection efficiency is below 10% in some particle size range.