• Journal of Environmental Science International
• /
• v.19 no.11
• /
• pp.1355-1362
• /
• 2010

This study was carried out in order to observe how the bay sediment would be changed with microbial treatments and a chemical oxidant like $CaO_2$. The sediment during the treatments was analyzed in terms of pH, ORP, volatile organics content, COD, AVS, T-N, and T-P. With $CaO_2$ treatment, pH was kept over 9.66 and ORP ranged from +4.70~+46.0, which meant an aerobic state meanwhile with the microbial treatment those were worse. In addition the chemical treatment showed better environmental index values than the microbial one: volatile organics content and COD values in the former were 12.9% and 37.9% while those in the latter were 4.5% and 18.7%, respectively. AVS and T-P were 71.1% and 100% versus 56.5% and 85.8%, respectively. However, the microbial treatment was better for T-N(66% higher). On the other hand, both treatment at a time enhanced all the environmental indices but COD meantime pH and ORP values were lower than with the chemical treatment only. Thus additional input of an oxygen generator like $CaO_2$ could improve the environmental state of a bay sediment where the biological treatment is going on.

• Journal of Korea Technical Association of The Pulp and Paper Industry
• /
• v.45 no.2
• /
• pp.41-45
• /
• 2013

Extractives of garlic (Allium scorodorpasum) and green pepper (Capsicum annuum L.) were used to prevent and exterminate rice weevils which contaminate stored rice. The extractives exhibited great efficacy against Sitophilus oryzae and Tribolium castaneum by annihilating all the weevils contained in a bottle. Furthermore, kraft paper coated by 5% extractives also displayed good effectiveness against the rice weevils. When rice weevils were stored with rice in a sack made of extractives-coated kraft paper, the number of living insects was sharply decreased according to elapsed time. In particular, 1,4-benzoquinone, which is very harmful to human, was detected from rice contaminated by Sitophilus oryzae and Tribolium castaneum through the analysis of GC/MS.

• Fisheries and Aquatic Sciences
• /
• v.25 no.5
• /
• pp.264-275
• /
• 2022

A non-destructive environmental DNA protocol for the genetic analysis of sea cucumber (Apostichopus japonicus) resources DNA was established. Among the several commercial DNA extraction kits, the DNeasy^® Plant Mini Kit was selected as the best choice to obtain the high-quality genomic DNAs from the mucous sea cucumber. As the temperature and incubation time increased, the amount of extracted environmental DNA was also large, but it was judged that the increased amount did not affect as much as 2-3 times. Therefore, these conditions were not considered to be the main factors to consider in actual environmental DNA extraction. However, the amount of seawater relative to the size of the sample was judged as a major consideration, and a sufficient amount of environmental DNA for analysis was secured when stored within 1 min while stirring the volume of seawater corresponding to the total sea cucumber weight (g). In securing the environmental DNA of sea cucumbers, the mortality rate of sea cucumbers in all experiments was 0, and it was judged that the effects of sea cucumbers were not significant through this treatment. Through the results of this study, sea cucumber DNA research, which has been conducted in a destructive method, can be conducted non-destructively through environmental DNA analysis. Through this study, we have secured a standard protocol that can successfully extract the sea cucumber DNA through environmental DNA. It is not only excellent in terms of time and cost of traditional DNA analysis method currently used, but it is completely non-destructive in the ecosystem of the survey area. It is believed that the system can be transformed in a way that does not affect it. However, it is thought that various standard protocols should be established considering the characteristics of each type.

• Proceedings of the Korea Technology Innovation Society Conference
• /
• 2006.11b
• /
• pp.155-166
• /
• 2006

Application of industry roadmap is to propose the vision on the future through correction and supplement of various environment change(nation competition power uplift, origin technology development, long and short-term vision establishment, R&D investment improvement, co-work increase etc). Now, in Jeju region, Roles of traditional medicine is needed by environmental needs(competition loss of Jeju industry, limitation of tourism industry etc). Thus, the purpose of this study is to contribute to region economy activity by building the TRM of foods field in traditional oriental medicine industry through the analysis of earlier TRM paper and materials.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
• /
• 2000.11a
• /
• pp.92-92
• /
• 2000

• International journal of advanced smart convergence
• /
• v.8 no.3
• /
• pp.145-150
• /
• 2019

Due to the development of science and technology and the emergence of new industries, the environmental change of the digital contents industry is rapidly progressing. The scope of technological development in the digital contents industry is affecting not only the entertainment industry but also various industries. Recently, with the development of digital convergence using realistic content, games, video, and VR have provided new opportunities for the growth of the content industry. The researcher determined that a new education system would need to be changed as the digital contents industry developed. For this purpose, an AHP questionnaire was conducted for experts with a high basic understanding of the education platform based on previous studies. We proposed a platform model for human resource development as an education system that meets the demand of digital contents industry. The education system for nurturing talents needed by future society should include elements that can interest the learning of users. The platform should not be approached from a system point of view, but should be developed from the content and user's point of view, considering the platform's original purpose.

• Proceedings of the Korea Society of Environmental Toocicology Conference
• /
• 2003.10a
• /
• pp.162-163
• /
• 2003

The Eco-2 Project presents a win-win strategy for the environment and for the economy (ECO-2 is an abbreviation of Ecology and Economy), The project was initiated by the Korean Ministry of the Environment to promote the development of an environmental industry technology as a means of driving national development in this sector. Our project work belongs to the category of integrated environment management technology, and is described as a development and utilization of risk assessment and analysis system for integrated environmental management in municipal and industrial areas. The goal of our project is to develop available system software in health and ecological risk assessment and to offer it as Decision Support System (DSS) to aid the effective management of environmental risk in municipal and industrial areas in Korea.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
• /
• 2003.10a
• /
• pp.237-242
• /
• 2003

The influence of wave forces on the moored ship beside quay was investigated based on in-house ship mooring analysis and ship motion program in this paper. The wind and current are the general environmental factors for the mooring analysis beside quay in the mild weather. However, the weather is becoming rough, the wave phenomenon should be included in the mooring analysis. In this paper, as preliminary stages, each moored rope tension was evaluated based on wind and current environmental condition. The results were compared with those from MOSES, commercial program. In addition to this, wave forces of the ship were calculated in order to solve moored ship motion of equation. We will leave to solve this motion equation as future work.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
• /
• 2002.05a
• /
• pp.179-184
• /
• 2002

For the development of the practical design and analysis scheme of a bridge connecting to the typical VLFS, relevant design criteria and theory and techniques are studied and numerical analysis for the verification of the structural safety of the bridge are carried out. For the design of a typical steel bridge, characteristics of proper type bridge are reviewed and the requirements fur the bridge of this kind are studied as well as the environmental loads. By using the design spiral technique, several alternatives are investigated and an efficient type of a bridge is initially designed. Structural idealization is performed to make overall structural analysis first, and the structural behaviors of the proposed bridge in the given loading condition are evaluated. Through this study a bridge is finally proposed and it is found that this one works well for the connecting function of the bridge.

• Journal of the Korean Operations Research and Management Science Society
• /
• v.19 no.2
• /
• pp.85-105
• /
• 1994

As an exploratory attempt, this study examined the correlates of different strategic groups in the Korean health food industry. Many prior studies believe that different entry mode such as entry timing and patterns, and different cognitive structure of top managers lead to the formation of different strategic groups in the same industry. Different strategic groups with different sources or mobility barriers are also expected to produce different level of economic performance. Multivariate statistical analyses of data from 32 firms in the Korean health food industry revealed the following results. i) There are four different strategic groups with different levels of mobility barriers in terms of firm size, scope of product/market domain, degree of forward and backward integration. ii) Differences in both entry timing and environmental perception of top managers are associated with different stratetic groups. However, the patterns of entry are not significantly different among four strategic groups. iii) Four strategic groups exhibit different level of economic performance in terms of sales growth rate and return on investment. Finally, this study tried to identify commonalities and differences among various strategic groups found in several industries in Korea. The results offered some implications to search for developing a useful theory of strategic groups in Korea.