• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.11
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• pp.5537-5555
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• 2017

Having the characteristics of unlinkability, anonymity, and unforgeability, blind signatures are widely used for privacy-related applications such as electronic cash, electronic voting and electronic auction systems where to maintain the anonymity of the participants. Among these applications, the blinded message is needed for a certain purpose by which users delegate signing operation and communicate with each other in a trusted manner. This application leads to the need of proxy blind signature schemes. Proxy blind signature is an important type of cryptographic primitive to realize the properties of both blind signature and proxy signature. Over the past years, many proxy blind signature algorithms have been adopted to fulfill such task based on the discrete logarithm problem (DLP) and the elliptic curve discrete log problem (ECDLP), and most of the existing studies mainly aim to provide effective models to satisfy the security requirements concerning a single blinded message. Unlike many previous works, the proposed scheme applies the signcryption paradigm to the proxy blind signature technology for handling multiple blinded messages at a time based on elliptic curve cryptography (ECC). This innovative method thus has a higher level of security to achieve the security goals of both blind signature and proxy signature. Moreover, the evaluation results show that this proposed protocol is more efficient, consuming low communication overhead while increasing the volume of digital messages compared to the performance from other solutions. Due to these features, this design is able to be implemented in small low-power intelligent devices and very suitable and easily adoptable for e-system applications in pervasive mobile computing environment.

• Steel and Composite Structures
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• v.35 no.4
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• pp.599-609
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• 2020

The tension-only braced frames (TOBFs) are widely used as a lateral force resisting system (LFRS) in low-rise steel buildings due to their simplicity and economic advantage. However, the system has poor seismic energy dissipation capacity and pinched hysteresis behavior caused by early buckling of slender bracing members. The main concern in utilizing the TOBF system is the determination of appropriate performance factors for seismic design. A formalized approach to quantify the seismic performance factor (SPF) based on determining an acceptable margin of safety against collapse is introduced by FEMA P695. The methodology is applied in this paper to assess the SPFs of the TOBF systems. For this purpose, a trial value of the R factor was first employed to design and model a set of TOBF archetype structures. Afterwards, the level of safety against collapse provided by the assumed R factor was investigated by using the non-linear analysis procedure of FEMA P695 comprising incremental dynamic analysis (IDA) under a set of prescribed ground motions. It was found that the R factor of 3.0 is appropriate for safe design of TOBFs. Also, the system overstrength factor (Ω₀) was estimated as 2.0 by performing non-linear static analyses.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.56 no.2
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• pp.138-146
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• 2020

Stow net fishery is one of the fishery with high fishing work accidents in southwestern sea of Korea. We conducted to serve as basic data for improving the healthy and safe working environment of fisher using risk assessment process (ISO45001) with fishermen's occupational accidents of the National Federation of Fisheries Cooperative (NFFC) from 2016 to 2018. The average occurrence rate of victim in this fishery was 9.04%, 16.7 times more than such rate in all industries. In addition, the average fatality rate was found to have a very serious level management to 31.06‱, 27.7 times more than such rate in all industries. The safety hazards of stow net fishery was more likely to occur by other general industrial groups, with more severe consequences after the accident. According to 4M analysis, 58.6% of all accidents were caused by human factors, 24.0% by environmental factors, 16.0% by mechanical factors, and 1.5% by managerial factors, respectively. The occurrence frequency by accident type was the highest in 187 cases (32.2%) for struck by object, 158 cases (27.2%) for slipping, and 94 cases (16.2%) for being in contact with machinery. Severity is the highest for others such as diseases etc., in the order of being struck by object, being in contact with machinery, falling from above slipping, collapsing, bumping, and burning. Being struck by object, being in contact with machinery, and slipping are high-risk groups, falling from above others, bumping, and burning are medium-risk groups based on the risk assessment using the occurrence frequency and severity of accident. The obtained results are expected to contribute to the safe operation environment subsidy for fishing crews on the stow net fishing vessel.

• Bulletin of the Korean Chemical Society
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• v.34 no.10
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• pp.3017-3021
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• 2013

Coumaroyl dipeptide amide, Coumaric acid-LG-$NH_2$, was prepared successfully using the solid-phase method, and its efficacy as a skin whitening agent was studied. Coumaric acid-LG-$NH_2$ was prepared with Rink-amide resin, and 96.354% of purity was obtained. Using MTT assay and LDH release assay, we found that it exhibited very low cytotoxicity. And, we found that Coumaric acid-LG-$NH_2$ inhibited tyrosinase activity dose-dependently and showed superior tyrosinase inhibitory activity to well-known whitening agent, arbutin. $IC_{50}$ value of Coumaric acid-LG-$NH_2$ was 182.4 ${\mu}M$, and $IC_{50}$ value of arbutin was 384.6 ${\mu}M$. Also, in measurement of melanin contents using B16F1 melanoma cell lines, Coumaric acid-LG-$NH_2$ reduced melanin production induced by ${\alpha}$-MSH statistically significant, and showed superior melanin inhibitory activity to p-coumaric acid or arbutin. In addition, Coumaric acid-LG-$NH_2$ reduced MC1R mRNA expression level. Thus, we concluded that MC1R pathway is the significant pathway of Coumaric acid-LG-$NH_2$, and Coumaric acid-LG-$NH_2$ has great potential to be used as novel whitening agents.

• Food Science of Animal Resources
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• v.32 no.1
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• pp.6-12
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• 2012

The association of three candidate genes, fatty acid synthase (FASN), microsomal triglyceride transfer protein (MTTP) and fatty acid binding protein 3 (FABP3), with fatty acid (FA) composition in Duroc pigs was investigated. Identified single nucleotide polymorphisms (SNPs) were used for polymerase chain reaction-restriction fragment length polymorphism genotyping. The c.265C>T SNP of FASN gene was significantly associated with high levels of palmitoleic acid (C16:1) (p<0.05), oleic acid (C18:1) (p<0.01), and mono-unsaturated fatty acid (MUFA) (p<0.01), but low levels of linoleic acid (C18:2) (p<0.01), alpha linolenic acid (C18:3) (p<0.05), and poly-unsaturated fatty acid (PUFA) (p<0.01) in animals having the CT genotype. The c.2573T>C SNP in the MTTP gene had a significant effect only in elevating the level of palmitoleic acid (C16:1) (p<0.05) in heterozygote animals. The polymorphism in FABP3 showed no significant effects on any fatty acid composition traits. These results suggest that the identified SNPs in the FASN and MTTP genes can be useful markers for selecting Duroc pigs having desirable healthy fatty acid composition.

• Korean Journal of Food Science and Technology
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• v.29 no.5
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• pp.895-900
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• 1997

Cyclodextrin (CD), which is one of food additives, was applied to Takju in oder to suppress the production of a stinking odor which its brewing and storage. CD was added to Takju in two different manners: one right after its brewing dilution stage, the other during its second mashing stage. After equal intervals of time, each sample was tested for fermentation process, storage capability, and sensory characteristics. The amount of CD ranged from 0.1 to 0.3% (w/w). The effect of CD on alcohol concentration, pH, total acidity and sugar content of Takju was shown to be more greatly influenced in the second sample rather than the first. The qualities of Takju were not affected by the addition of CD in the first sample. The sensory evaluation showed that the sample of the brewing dilution stage proved to be more attractive in the level of acceptability. However, when CD was over-added to Takju, the degree of acceptability declined due to the fact that the over-addition of CD suppresses its unique taste and flavor.

• Journal of Korea Technology Innovation Society
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• v.13 no.4
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• pp.656-679
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• 2010

IT was 90's that the government actually support the basic research in Korea. During the two decades, government accelerate the support to the basic research and therefore distinctive increase in the number of SCI papers. In 2008, Korea produced 35,569 SCI papers and it takes 2.42% of total SCI papers in the world. But, in spite of this quantitative growth, the qualitative level of Korean SCI papers is stagnant at 30s. To improve these phenomenon, this paper suggests recommendations about three aspects of research management-research support, evaluation, output diffusion. In the 21st century, the creative research output is more important than ever. Thus the government shout change its basic research supporting system from quantitative to qualitative aspect.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.5
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• pp.715-720
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• 2005

This study was carried out to investigate the effect of chitosan-liquid calcium (CLC) on the high-calcium kimchi fermentation. The $0.5\%$ of CLC retarded the decreasing rate of pH and the increasing rate of titratable acidity, and these effects were more conspicuous with liquid calcium. Total microbes and lactic acid bacteria counts were lower in CLC $(0.5\%)$ added kimchi during fermentation. The a-value of kimchi juice was gradually increased but the L- and b-values were decreased. The calcium content of the kimchi supplemented with $0.5\%$ of CLC was maintained in the range of $207\~228\;mg\%$. In sensory evaluation test of $0.5\%$ CLC-added kimchi, the staled flavor was decreased, the crispness was maintained and the overall taste was increased to highest level after 15-day fermentation.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.15 no.6
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• pp.275-281
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• 2015

Korea's e-government is the world best system and the open government data field is also ranking number 1 by UN evaluation. Therefore Korea's ICT level is ranking number 1 in the world especially in ICT (Information Communication Technology). However, in terms of national ICT capabilities, national ICT competency education is tend to perform by the simple list of courses rather than detail definition of the specific skills or training. In this paper, we define the national ICT capabilities through research and analysis of the national ICT competency model and define the relevant curriculum. This is very important to develop national ICT competency as well as ICT technologies because other countries will develop their information by learning from Korea's ICT and e-government as a model. Therefore, we firstly study about the national ICT competency model and will be drawn from the courses required for national ICT competency model.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.40 no.4
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• pp.55-66
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• 2017

Korean small and medium sized software companies have tried to export their solutions or services to overseas markets. In 2016, exports of the software industry increased by 6.0% from the previous year, and the value added of the industry was 2.2 times higher than that of the manufacturing industry. From a long-term perspective, it is important to secure a global competitive advantage in order to sustain the export high value-added of the software industry. The obstacles to entry into the overseas market of small to medium enterprises are as follows: first, difficulty in product development and localization of marketing; second, lack of investment for overseas expansion; and finally, competitiveness of software technology. In particular, To overcome such obstacles, Korean small and medium sized software companies should increase the technical perfection and secure software export competitiveness. The paper presents a payment settlement framework enabling adaptive reuse and semiautomatic development of global payment settlement services. The quantitative and qualitative evaluation results are presented with domestic and overseas case studies as follows: Firstly, semi-automatic development is realized successfully by applying the framework. Secondly, it is possible to maintain consistent quality of software and to deliver maintenance services without relying on the internal human resources. Thirdly, it is possible to reduce the project duration of the same development cope to less than 50% by applying the framework. Finally, because it is based on BPMN 2.0, which is a high level design diagram, it is expected that it will be easy to implement through components connection and reduce difficulties in technology transfer and localization. Also, at the time of runtime operation, it will be effective to understand the design idea easily and to carry out additional developments without human resource who participated in the initial project.