• Journal of the Korean Society of Food Culture
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• v.19 no.3
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• pp.273-284
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• 2004

This study is on the changing pattern of fish-and-shellfish uses during the last two thirds of Chosun period on the premise that they are influenced by development of fishing technology. With a literary approach, this paper researches how fish-and-shellfish production and consumption pattern changed, especially in relation to technological development of fisheries. First, we examine into the changes of fishery production. And next, we analyze the kind and cooking method of fish-and-shellfish in [Eum-sik-di-mi-bang](1670) and [Gyu-hap-chong-seo](1815). The analysis of two books revealed that there were significant differences in fish-and-shellfish uses. Because the two books were written with a gap of 145 years and the development of fishing technology and remarkable changes of fishery production affected on the fish-and-shellfish uses. Due to primitive fishing tools and skills, fresh-water and reverse-river-fish and shellfish had been caught in substantial amount until the middle ages of Chosun period. As a result, the availability of seafood were limited extremely even in the upper classes. These situations are evidenced by the analysis of [Eum-sik-di-mi-bang]. Only 12 kinds of fish-and-shellfish are described in [Eum-sik-di-mi-bang]. Most of the sesfoods is mollusc which is easy to catch. As for the salt-water fish, dried cod and dried herring were mentioned. Mullet, the reverse-water-fish, is used most frequently. Only one kind of 'Hoe', which needs extreme freshness, is described. This means that the use of fresh fish-and-shellfish was very limited to some kinds which could be caught near the village. As the netting fishery began to be developed in the 18th century, the production of some salt-water fishes, such as anchovy, shrimp, yellow corvina, pollack, and herring, had increased remarkably to make marine resources more available. Small fish, such as anchovy and shrimp were preserved as 'Jeot-gal' and sold nationwide. Therefore, 'Jeot-gal' and seafood could be used in Kimchi around this time and had a deep influence on the change of Kimchi in taste and nutrition. In [Gyu-hap-chong-seo], 33 kinds of fish-and-shellfish are described. Including cod and herring, 17 kinds of sea water fish and mollusc are mentioned. Some of these are consumed in fresh state, neither as dried nor as salted. Because the merchants promoted the transport of seafoods to other regions according to the growth of commercial economy. As a result the diet of the people could be enriched by the various seafoods.

• Horticultural Science & Technology
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• v.16 no.3
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• pp.347-349
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• 1998

Slow sand filtration was modified and applied for the determination of eliminating efficacy of various fungi and for recommending an easy approach to growers. After 1,500 liter filtration, Fusarium oxysporum was eliminated by several substrates such as activated charcoal (92.5% elimination), silica (90.8%), vermiculite (90.5%), sand (82.3%), perlite (50.4%), and hydroball (21.2%). Silica was able to eliminate several fungi by maximal ratio, which was corresponded to Fusarium oxysporum 120 cfu/mL. Collectotrichum lagenarium 98 cfu/mL. Phytophthora capsici 82 cfu/mL, Botrytis cinerea 62 cfu/mL, Pythium spp. 42 cfu/mL, and Sclerotinia ssp. 52 cfu/mL. In this case, the change of EC was minor and pH was maintained to about 7. In deep flow culture of 'Ddooksum Cheokchookmyeon' lettuce and 'Seokwang' tomato, silica-, activated charcoal-, and vermiculite-based filtration system successfully eliminated Fusarium oxysporum and Phytophthora capsici from the nutrient solution. As a result, these plants were not diseased by ten weeks after inoculation. With this system, growers can easily control the root-zone fungi in the recirculating hydroponic system.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.11
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• pp.1-8
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• 2020

In recent years, due to the exponential increase in internet data, many fields such as deep learning have developed, but side effects generated as commercial advertisements, such as viral marketing, have been discovered. This not only damages the essence of the internet for sharing high-quality information, but also causes problems that increase users' search times to acquire high-quality information. In this study, we define advertisement as "a text that obscures the essence of information transmission" and we propose a model for filtering information according to that definition. The proposed model consists of advertisement filtering and advertisement filtering performance improvement and is designed to continuously improve performance. We collected data for filtering advertisements and learned document classification using KorBERT. Experiments were conducted to verify the performance of this model. For data combining five topics, accuracy and precision were 89.2% and 84.3%, respectively. High performance was confirmed, even if atypical characteristics of advertisements are considered. This approach is expected to reduce wasted time and fatigue in searching for information, because our model effectively delivers high-quality information to users through a process of determining and filtering advertisement paragraphs.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.5 no.4
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• pp.257-266
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• 2000

A vertically-averaged, two-dimensional version of the Princeton Ocean Model has been applied to the South Sea to simulate the circulation driven by tides and inflows/outflows across open boundaries. To incorporate both forcing properly, a two-step modeling approach is adopted, in which the tidal circulation is first simulated by specifying the tides along the open boundaries, and then both the calculated tidal currents and the observed steady mean currents are prescribed across the open boundaries. Model results show that the steady, subtidal circulation of the South Sea is different from the residual circulation due to tidal rectification, and subtidal currents become locally as strong as tidal currents. The Cheju Current entering the model domain across the Cheju Strait flows eastward in general while shifting onshore or offshore areas following local isobaths. The Tsushima Current entering across the southern boundary reaches farther to the north in the eastern vicinity of Cheju-Do as compared to that entering across other parts of the southern boundary. The Tsushima Current turns to the east, merges with the Cheju Current, and both the Cheju and Tsushima Current exit to the East Sea through the western channel of the Korea Strait. An intensification of the outflow occurs over the deep trough adjacent to the Tsushima Island, which appears to be due to the formation of the frictional boundary layer in order to remove excess positive relative vorticity generated by an increase in the layer thickness. The circulation driven by both the tidal and inflows/outflows is different from that driven by each forcing separately in coastal areas, which implies that both forcings should be considered simultaneously in the simulation of more realistic coastal circulation.

• Archives of design research
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• v.11 no.3
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• pp.101-110
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• 1998

It is impossible that the corporation can make up good corporate images with sales promoting and pursuing profits only. To form impressive oorporate images, the corporation should acquire efficient marketing images and social oonfidences with the investment for the culture, the art, the preservation of public health, educations and social welfare programs. The oorporate image is indined to be formed by audiences subjectively even though the corporation makes great efforts to have its unique images. The audience has a tendency to have their subjective opinions about the corporate image based on several informations communicated by the corporation and various sources. The sensitive approach and emotional persuation can be efficient for making good corporate images because corporate images of audiences arise from emotional and sensitive factors rather than rational ones. There are many previous studies verifying that the humor effect should be one of powerful means for inducing concentrations, memorizations and persuations. The majority of popular advertisings are humor touched one and the questionaire proves that almost all university students participating sample test, prefer humorous advertisings to serious advertisings. The questionaire verifies that it is a most efficient method is using humor effects at product advertising to improve the corporate image indirectly. And there are very possitive reactions about applying humor effects for the corporate image advertising and the other advertisement types such as pamphlets and catalogues. The humor effect motivates the persuation with spiritual pleasures and intimacy, and it minimize the negative aspects of advertising for the formation of the corporate image. The humor effect is valuable not only for the formation of the corporate image reflecting the entity of the oorporation itself but also for the ideation of advertising communications. The study on the humor effect related with the corporate image is significant because the humor is a different version of the humanism based on deep oontemplation and oomprehension of human life rather than simple means to motivate laughers.

• Journal of Nutrition and Health
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• v.29 no.3
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• pp.321-330
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• 1996

With changing socio-economic environments, there have been some changes in the Korean diet. One of major changes is the increasing fat intake. Based on the current trend of increase, it is important to understand factors related to fat intake levels. Objective of this study was to find out the differences in food consumption patterns, demographic characteristics, and other socio-economic factors among three groups of households. The households were devided into three groups by percentage of fat energy intake to total energy intake such as less than 15%(Group 1), from 15% to 25%(Group 2), and more than 25% (Group 3). Among 1, 987 households, the numbers in Group 1, Group 2 and Group 3 were 792(39.6%), 902(45.4%), and 293(15.1%), respectively. The mean size of family was 3.44 person per households for total survey household, 3.42 for Group 1, 3.54 for Group 2, and 3.21 for Group 3. More than 60% of families living in the rural area belonged to Group 1(p<0.05). Group 3 had most educated food preparers and more income than other groups(p<0.05). Group 3 showed higher intake of all nutrient analyzed except carbohydrate (p<0.05). Other than calcium and vitamin A for Group 1, and vitamin A for Group 1, and vitamin A for Group 2, all nutrient intake analyzed for three groups were more than 75% of Korean recommended dietary alowances. Mean fat intakes for Group 1, Group 2, and group 3 had highest amount of intake for all food groups. According to food group analysis, Group 3 had highest amount of intake for all food groups except vegetables. Group 3 consumed more than 10 times of meats compared to Group 1. Group 3 had more dishes prepared by baking, deep-fryng, stir-frying, and pan-frying other two groups. Processed foods were used most frequently in Group 3. Other diet and related factors were analyzed also. These results showed that the amount of fat consumed by Korean households varies widely. Households with high fat energy intake had tendency to reside in the largy city, and to have heigher education level and more income than other groups. They eat less vegetables, use more cooking methods using oils, and use more processed foods. To ensure a proper intake of fat, there should be two separate ways of approach for high fat energy group and low fat energy group, since they are different in many ways.

• Journal of the Korean Society for Marine Environment & Energy
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• v.8 no.3
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• pp.111-115
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• 2005

The concentration of atmosphere carbon dioxide ($CO_2$) which is one of the major greenhouse gas, continues to rise by the increase in fossil fuel consumption, forest destruction and decrease of biological diversity, etc. In order to weaken the global warming, a reduction of $CO_2$ discharge to the atmosphere is required. The $CO_2$ ocean sequestration technology utilizes the intrinsic oceanic capacity of $CO_2$ absorption, diluting and/or dispersing the liquefied $CO_2$ in the deep ocean (>2,000 m). This geo-engineering approach is regarded as one of the occasions to mitigate the $CO_2$ concentration in the atmosphere. Some developed centuries such as Japan, USA, Norway, etc. have intensively carried out the projects on the research and development of $CO_2$ ocean sequestration since 1990s. There have been several approaches to develop the relative technological system to mitigate the increasing $CO_2$, however, there was no systematic and practical R&D programme in the $CO_2$ ocean sequestration. This paper has described the state of the art on the three optional methods of $CO_2$ sequestration, and compared with them in the aspect of the applicable possibility.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.8
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• pp.530-536
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• 2020

The use of minutiae by fingerprint readers is robust against presentation attacks, but one weakness is that the mismatch rate is high. Therefore, minutiae tend to be used with skeleton images. There have been many studies on security vulnerabilities in the characteristics of minutiae, but vulnerability studies on the skeleton are weak, so this study attempts to analyze the vulnerability of presentation attacks against the skeleton. To this end, we propose a method based on the skeleton to recover the original fingerprint using a learning algorithm. The proposed method includes a new learning model, Pix2Pix, which adds a latent vector to the existing Pix2Pix model, thereby generating a natural fingerprint. In the experimental results, the original fingerprint is restored using the proposed machine learning, and then, the restored fingerprint is the input for the fingerprint reader in order to achieve a good recognition rate. Thus, this study verifies that fingerprint readers using the skeleton are vulnerable to presentation attacks. The approach presented in this paper is expected to be useful in a variety of applications concerning fingerprint restoration, video security, and biometrics.

• Journal of Periodontal and Implant Science
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• v.33 no.2
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• pp.193-213
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• 2003

The purpose of this study is to evaluate the phenomenon of attachment and spreading of the cultured rat　calvarial cell inoculated on their surface of different kinds of biodegradable membrane which had been used on tissue regeneration on periodontal defects by using scanning electron microscope. In this experiment 30 Sprague-Dawley male rats (mean BW 150gm) were used to harvest abundant number of cell in the short period. The rats were sacrificed by decapitatioan to obtain the calvaria for bone cell culture. Calvarial cells were cultured with Dulbecco's Modified Essential Medium contained with 10% Fetal Bovine Serum under the conventional conditions. Biodegradable barrier membrane were collected with collagen type, and were divided into 3 different kind of surface such as scattered, polarized and fine-net type as their surface texture. Microcover plate which usually used for cell culture was used as control for smooth surface. All the membrane were seeded with cultured calvarial cell on their surface. The number of cell inoculated on the membrane were $1{\times}10^6$ Cells/ml. After the culture as designed time, all the membrane were washed with 0.1 M Phosphate Buffered saline and fuxed with 2.5% Glutaraldehyde. And all specimen were treated with $OsO_4$, and Tannic acid before drying the cell for coating the cell with gold. Scanning Electron Microscope was used to observation. The following results were obtained. I. During the whole period of experiment, the phenomenon of cell attachment and spreading were revealed similar pattern to compare with smooth surface culture plate and ordinary culture dish. 2. The shape of cell attachment and spreading on the surface of barrier membrane were observed no remarked difference pattern between smooth surface culture plate and ordinary culture dish. 3. The cytoplasmic process of cultured calvaria cell extent to the deep portion of barrier membrane like as their own proper shape. 4. There were no remarkable relationships between the degree of cultured cell spreading and surface structure of barrier membrane. 5. Slight starified layer of cultured calvaria cell were observed on the scattered type of resorbable membrane, Conclusively, this study thus suggest that cultured bone cell inoculated onto the biodegradable barrier membrane may have an important role of carrier for many cell which could be used as new tissue regeneration, and those tissue engeering technique may become an new method in the approach to the repair of bone defects.

• Journal of Digital Contents Society
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• v.9 no.4
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• pp.591-600
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• 2008

Korean traditional culture has a long history and it is rooted in the deep down our national culture. It is like bread and pride for Korean people. The tale of Cheyong is a precious cultural heritage, which has existed in the public awareness of the Korean people since the period of unified Silla. Based on its mysterious and beautiful story, the value of traditional culture can be revealed through development of digital contents. With such precious cultural resource we can digitalize the fun contents which the general public can enjoy. Ways of digitalize of cultural archetype has been suggested by analyzing the content elements of the tale of Cheyong. Also, by making scientific approach to the development process of digitalization, the possibility of digitalization has been found through 3D animation restoration process for Cheyong Dance and the process of making the tale of Cheyong into animation. Through analyzing the contents development process of cultural archetype of the tale of Chetyong, a cultural archetype sourcehas been developed which has a great value as a contents product that can be developed and used as various cultural content art works. With studies on the theory of development method for digitalization of traditional culture, scientific studies and investigation have to be continuously carried out so the digitalization of Korean cultural heritage, which will shine in the world, can be continued as well.