• Korean Journal of Agricultural Science
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• v.32 no.2
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• pp.181-195
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• 2005

This study is to provide a comprehensive overview of the changing vegetable sector of Chinese agriculture and to analyse the competitiveness of Chinese vegetable production. China now produces more than 60% of the world's vegetable supply and that 150 million people are engaged in vegetable production, processing and marketing since the reform of vegetable industry structure started in the late 1980s. As a labour abundant industry, China also features more comparative advantages in the vegetable trade. Although China's vegetable exports still accounts for only 1% of total production, the 5 million tons of export in 2003 makes China one of the largest vegetable players in the international markets. When estimating competitiveness of China's vegetable industry, China's producers' prices for vegetables are founded to be only from 10%~40% of what they are in Korea, while most of China's vegetables have also strong competitiveness in quality. As China joined the WTO in 2001 and expects to increase market share in vegetable trade, the development strategy for Korea's vegetable industry are suggested as follows; 1) focusing on the technology for the growth of vegetable productivity, 2) developing the higher value added vegetable industry through processing, 3) expanding the exported area and leading vegetable varieties.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.36 no.5
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• pp.437-441
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• 2003

This research investigated the effects of processing conditions and natural antimicrobial materials on quality of freeze-dried, seasoned and roasted Alaska pollack (Theragra chalcogramma). The optimum dipping time and moisture contents of freeze-dried Alaska pollack were 1 sec in $1\%$ salt solution, $48.6\%$ respectively. The freeze-dried, seasoned and roasted Alaska pollack product showed high sensory value. As sterilization time increased over 30 mins in water bath at $100^{\circ}C$ the browning degree of the freeze-dried, seasoned and roasted Alaska pollack product increased. Among various antibrowning agents, $3\%$ corn starch was better in preventing browning than sporix treatment. The freeze-dried, seasoned and roasted Alaska pollack product added with lactate Ca and catechin had the antimicrobial, and the VBN contents of the product showed low level.

• Microbiology and Biotechnology Letters
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• v.27 no.2
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• pp.172-178
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• 1999

In this study, we tested possibility of replacing nitrite salts, which were always added during the meat product processing, with the metabolites produced by antimicrobial and red pigment producing Monascus strains. We have already shown that Monascus No. 116 strain has the highest antimicrobial activity among the strains isolated from Ang-Khak. Monascus isolate No. 229 was chosen due to its outstanding red pigment producing ability. The red pigment production by No. 229 was highest in the medium containing 8% sucrose, 2% yeast extract, 0.1% K2HPO4, 0.5% MgSO4. Optimum pH and temperature for the red pigment production were pH 6.2 and 3$0^{\circ}C$, was found in spot or Rf value 0.54 on TLC plate using ethyl acetate-acetone-water (4:4:1, v/v/v) as development solvent system. Isolate No. 116 and No. 229 were cultured in a optimal condition for the antimicrobial activity and red pigmentation. The culture concentrates were applied in situ to the production of instantly processed ham. Mixed application of 89 ppm Na-nitrite and 300 ppm of culture broth concentrate of Monascus isolate No. 116 and 500 ppm of red color produced by Monascus isolate No. 229 showed similar results with the single application of 94 ppm Na-nitrite. These results confirmed that the antimicrobial activity and red pigment of Monascus strains might be valuable to replace Na-nitrite salt in meat processing.

• Macromolecular Research
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• v.16 no.5
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• pp.404-410
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• 2008

In order to obtain 'value added products' from polypropylene (PP)/waste ground rubber tire powder (WGRT) composites, PP/WGRT microcellular foams were prepared via supercritical carbon dioxide. The effects of blend composition and processing condition on the cell size, cell density and relative density of PP/WGRT micro-cellular composites were studied. The results indicated that the microcellular structure was dependent on blend composition and processing condition. An increased content of waste ground rubber tire powder (WGRT) and maleic anhydride-grafted styrene-ethylene-butylene-styrene (SEBS-g-MA) reduced the cell size, and raised the cell density and relative density, whereas a higher saturation pressure increased the cell size, and reduced the cell density and relative density. With increasing saturation temperature, the cell size increased and the relative density decreased, whereas the cell density initially increased and then decreased.

• The Journal of Fisheries Business Administration
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• v.48 no.1
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• pp.1-16
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• 2017

The fisheries industry has led the Korean economy, and has been achieving high-level position in the world. However, this industry meets aging, low growth and profit. In order to overcome this critical situation, it is needed to understand the overall status of industry. In industry level, most of previous researches focused on ocean industry rather than fisheries. In addition, scholars have been getting a lot of attention about fisheries cooperatives, fishing-ports, methods of fishery, and manufacturing process in fisheries sector. The aim of this research is analysis of domestic fisheries industry's managerial performance using data envelopment analysis(DEA) considering operating and scale view. Furthermore, the comparative analysis is performed by firm size, and industry type. In results, fisheries industry's managerial performance is not high, overall. In more detail, most of big size firms are under decreasing returns to scale(DRS) status. Fishery processing industry's performance is low, and fishery distribution industry has the best performance. This paper suggests that transferring operating capability from big firms to small firms, and policy supports and firm's activities should be accompanied for high-value added in fisher, and fishery processing industries.

• Journal of the Korea Society of Computer and Information
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• v.8 no.3
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• pp.100-106
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• 2003

This paper presents the design of a value-added ATM switch. The ATM switch ca perform CAC Processing and Firewall Processing Routine at packet-level (IP) at the ATM environment per port. The proposed two routine are integrated into the components of ATM switch. The Firewall switch employs a suggested two routine model to avoid or reduce the latency caused by filtering. Also, we suggest four classes are defined. namely, classes A, B, C, and D, which are orded from the safest to the most dangerous. The suggested model performance of ATM Firewall switch is estimated simulation in terms of the throught and latency by computer.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.653-656
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• 2006

선진 전력시장에서는 전력산업의 환경이 수용가 중심의 시장구조로 변화함에 따라, 이들을 대상으로하여 IT 기반의 다양한 전력부가서비스가 제공되고 있다. 이러한 서비스에 대한 연구개발은, 시간이 흐르면서 단방향이 아닌 양방향 통신 기반의 소비자 중심 서비스 분야로 확대되는 경향을 보인다. 특히, 미국 EPRI의 IntelliGrid 컨소시엄에서 제시한 수용가 포탈은 소비자 영역내의 장비와 에너지 서비스 기관 간의 양방향 통신을 지원하는 통합적인 개념의 서비스 기반으로, ESP(Energy Service Provider)와 소비자는 더욱 상세한 정보를 이용하여 더 많은 이익과 혜택을 기대할 수 있다. 이에 비해 국내의 전력부가서비스 제공 수준은 아직 시작 단계에 불과하지만, 머지않아 국내 전력시장 역시 양방향 통신 기반의 수준 높은 전력부가서비스를 요구하게 될 것으로 보인다. 따라서 국내환경에 적합한 수용가 포탈 기반의 전력부가서비스 개발이 필요하며 이를 통해 수용가에게는 비용 절감이 가능한 합리적인 소비 방안을 제시하고, ESP에게는 부하 수요관리 및 투자비를 절감할 수 있는 기회를 제공해야 할 것이다. 본 논문에서는 새로운 전력부가서비스를 기반이 될 수용가 포탈을 분석하고, 현행 전력부가서비스의 현황과 동향 분석, 적용가능 기술 분석을 수행하여 그 결과를 바탕으로 국내환경에 적합한 수용가 포탈시스템 기반의 전력부가서비스 선정 및 구축 방안을 제시하고자 한다.

• Journal of Information Processing Systems
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• v.17 no.2
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• pp.306-317
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• 2021

The unbalance between system ergodic sum rate and high fairness is one of the key issues affecting the performance of non-orthogonal multiple access (NOMA) system. To solve the problem, this paper proposes a power allocation algorithm to realize the ergodic sum rate maximization of NOMA system. The scheme is mainly achieved by the construction algorithm of fair model based on α fair utility function and the optimal solution algorithm based on the interior point method of penalty function. Aiming at the construction of fair model, the fair target is added to the traditional power allocation model to set the reasonable target function. Simultaneously, the problem of ergodic sum rate and fairness in power allocation is weighed by adjusting the value of α. Aiming at the optimal solution algorithm, the interior point method of penalty function is used to transform the fair objective function with unequal constraints into the unconstrained problem in the feasible domain. Then the optimal solution of the original constrained optimization problem is gradually approximated within the feasible domain. The simulation results show that, compared with NOMA and time division multiple address (TDMA) schemes, the proposed method has larger ergodic sum rate and lower Fairness Index (FI) values.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.55 no.3
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• pp.278-283
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• 2022

To develop a value-added anchovy Engraulis japonicus sauce, we examined processing conditions and quality characteristics of rapidly fermented, high purity anchovy sauce (RPAS) by adding 30% (w/w) intermediate salt-fermented anchovy material. RPAS had higher total nitrogen and amino nitrogen contents, and lower salinity than traditional anchovy sauce (TAS). The total amino acid contents of RPAS and TAS were 17,626.8 and 12,808.2 mg/100 g, respectively, and the major amino acids were alanine, glutamic acid, lysine, cystine, valine, and leucine. The histamine contents of RPAS and TAS were 12.6 and 25.2 mg/100 g, respectively, and the protease activity levels were 0.851 and 0.595 unit/mg, respectively. These results demonstrate that RPAS was more flavorful, and could shorten the salt-fermentation period by more than half compared to TAS, and can serve as a high-end fish sauce.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.55 no.4
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• pp.417-424
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• 2022

To develop a value-added anchovy Engraulis japonicus sauce, the processing conditions and quality characteristics of a rapidly fermented and high-purity anchovy sauce (RRAS) were examined by adding 5-10% (w/w) radish Raphanus sativus L. RRAS exhibited higher yield, total nitrogen content, and amino nitrogen and calcium contents as well as lower salinity than those of conventional anchovy sauce (control). The salinity, yield, and total amino acid contents of RRAS and control were 17.2-17.7% and 19.6%, 81.2-88.7% and 61.0%, and 13,117.8-14,174.9 mg/100 g and 10,041.1 mg/100 g, respectively. The major amino acids recorded were aspartic acid, glutamic acid, alanine, valine, isoleucine, leucine, phenylalanine, ornithine, lysine, and histidine. The histamine contents of RRAS and control were 8.3-8.6 mg/100 g and 19.2 mg/100 g, respectively, while the protease activity levels were 0.901-0.958 unit/mg and 0.695 unit/mg, respectively. Overall, this study establishes that RRAS can not only significantly shorten the salt fermentation period, but can also serve as an anchovy sauce with superior nutritional quality and higher levels of amino acid and calcium.