• Journal of Conservation Science
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• v.31 no.2
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• pp.87-94
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• 2015

Plastic artwork can be appeared crack, change of color and whitening event by various environment conditions. A large scale plastic artwork often exhibits in outside it will be directly degraded by physical and chemical degradation factor such as strong sunlight, high humidity and rainfall. We should know degradation characteristic of plastics to prevent these damages. In this study, we studied degradation characteristic of plastics (5 types of wide use plastics; polypropylene, polystyrene, polyethylene, polyvinyl chloride, polyurethane) depending on various artificial degradation conditions such as high temperature, ultraviolet and these complex conditions (high temperature and ultraviolet). As a result, polypropylene, polystyrene and polyethylene show the most visible change especially polypropylene, polystyrene. Polypropylene didn't show a great change degree of tensile strength and contact angle, on the other hand polystyrene did. Polypropylene and polystyrene weakened by photo degradation, polyvinyl chloride and polyurethane had relatively good light stability. Also the high temperature and complex conditions were most degradation characteristic. High temperature worked for degradation catalyst because its energy can not enough worked for cut off binding energy of plastics while ultraviolet condition effected as directly degradation condition. Though following results, we expect it can be applied to investigation of degradation factor depending on plastic artwork materials and basic result of plastic artworks conservation.

• Journal of Conservation Science
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• v.26 no.4
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• pp.377-383
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• 2010

The effect of gamma irradiation on the microbial growth inoculated in the Korean traditional paper, Hanji, was investigated. Also, the mechanical properties of Korean traditional paper were measured to verify the possible change by gamma radiation. Bacillus cereus and Aspergillus niger were cultivated and the spores were innoculated in papers at the 250,000 and 500,000 colonies, respectively. In these results, 5log spores of B. cereus could be all inactivated at the dose of 6 kGy, and 5log A. niger be inactivated at 8 kGy, respectively. There was also showed no significant change in tensile strength, bursting strength and color index of Korean traditional paper by the gamma irradiation upto the dose of 50 kGy. These results confirmed that radiation treatment of Korean traditional paper is extremely efficient and could be used to preserve ancient books and archives documents from being damaged by moulds and fungi.

• Cartoon and Animation Studies
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• s.41
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• pp.337-356
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• 2015

Recently augmented reality contents are variously used in public such as advertisements or exhibits as well as children's books. Therefore, it is certain that the market, development of augmented reality contents, is gradually growing. Those who are the producer of augmented reality may be familiar with the skill where those images are used as a marker which is created by image recognition technique. In case of using image recognition technique, they usually use the augmented reality marker platform from Qualcomm since it is able to recognize self-produced images and 3-dimensional figures at no cost. This study was started when undergraduate students began to use those general techniques in their contents producing process. AR majoring students in Namseoul University applied image recognition technique to 3 AR contents exhibited in Sejong Center. Creating 3 different images, they have registered images at Image Target Manager provided by Vuforia to use as a marker. Moreover, they have modified the image producing method to raise the recognition rate by research. The higher recognition rate brings the more stable use of augmented reality contents. To achieve the satisfied rate, they have compared the elements of color contrast, pattern and etc. in the use of platform. Thus, the effective image creation method has been drawn. This study is aiming to suggest the production of stable contents by recognizing smart devices' limitation and producing educational contents. The purpose of this study is to help practically augmented reality contents developers by illustrating the application of augmented reality contents which are based on image recognition technique and also its effectiveness at the same time.

• Journal of the Korean Society of Food Science and Nutrition
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• v.36 no.2
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• pp.228-232
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• 2007

The purpose of the study was to investigate the quality characteristics of Jeju island's indigenous pork fed with citrus byproducts. Samples were the Jeju island's indigenous pork loin without citrus byproduct (JNP-0) and the Jeju island's indigenous pork loin fed with 8% and 15% citrus byproducts during growing and fattening periods (JNP-1). The pH, VBN content, bacterial counts, L* value, frozen loss, thawing loss, water boiling loss, hardness, springiness, cohesiveness, chewiness, and shear force value were not significantly different between JNP-0 and JNP-1 (p<0.05). The TBARS, a* value, b* value, water holding capacity, and pan boiling loss of JNP-0 were significantly higher than those of JNP-1 (p<0.05), but the gumminess of JNP-1 was significantly higher than that of JNP-0 (p<0.05). For sensory characteristics, taste, flavor, juiciness, and palatability were not significantly different between JNP-0 and JNP-1, but tenderness of JNP-1 was sig-nificantly higher than that of JNP-0 (p<0.05).

• Journal of Korean Society of Forest Science
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• v.76 no.1
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• pp.41-50
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• 1987

The various conditions of photographs, especially kinds of films, combinated filters and seasons are important factors for forestry purpose aerial photography. In this paper the variations of tones were compared between color and color infrared, panchromatic black and white and infrared black and white, and among false color photographic images created by using 3 kinds of filters when prints are made. Color infrared film was good for identifying tree species, for its spectral signatures had a greater range of tones and hues than color signatures. In that case taken in May were more effective than taken April. False color photographs were not so good as color photographs because they were mostly dark and indistinct. Infrared black and white film with medium red filter showed potential for separating broad-leaved forests from conifers. MSS composed photographs, when composed with proper bands and densities, were proved useful for distinguishing land use types but not applicable to more detailed practices such as forest type separation and tree species identification.

• Journal of the Korean Society of Food Science and Nutrition
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• v.44 no.7
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• pp.1050-1057
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• 2015

This study evaluated the quality characteristics of muffins added with different amounts (0%, 3%, 6%, or 9%) of red ginseng marc powder. The specific gravity of red ginseng marc muffin batter significantly increased with increasing amounts of red ginseng marc powder (P<0.05). Weight and baking loss rate of muffin were not significantly different from those of the control. Volume, height, and pH of muffins significantly decreased when amounts of red ginseng marc powder increased (P<0.05). The moisture contents of muffins added with red ginseng marc powder increased with increasing amounts of red ginseng marc powder. The lightness and yellowness of muffins and dough increased as concentration of red ginseng marc powder increased. Redness decreased as concentration of red ginseng marc powder increased. DPPH radical scavenging activity of muffins increased with an increase in the concentration of red ginseng marc powder. The hardness, gumminess, and chewiness decreased with increasing red ginseng marc powder concentration. Adhesiveness, springiness, cohesiveness, and resilience increased with addition of powder. Sensory test revealed no significant differences in color, texture, and mouthfeel between the muffin samples. Therefore, red ginseng marc powder can be incorporated into muffins up to 6% to improve functional quality of red ginseng marc and minimize changes in quality. Futhermore, this study proposes the possibility of development of various products using red ginseng marc.

• Korean Journal of Plant Resources
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• v.30 no.1
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• pp.78-87
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• 2017

This study was compared to outdoor field (OF) and rain shelter greenhouse (RSG) according to cultivation type of Gastrodia elata Blume. Also, the effects of yield and quality for mulching materials in RSG were compared. The yield of G. elata was investigated good merchantable quality, and the quality was investigated hardness, chromaticity, weight loss and the contents of the major functional components. The cultivation of RSG was increased the yield, hardness, gastrodin, and vanillyl alcohol compared to OF, and the weight loss, chromaticity, and ergothioneine were almost equal. Rice straw treatment showed higher than those of the control and other treatments on the yield and hardness. As a result, the yield and the quality of RSG, which can control the soil moisture, were better than that of OF. And the lower the soil moisture content according to the mulching material, the harder the surface and the higher the hardness.

• Korean Journal of Plant Resources
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• v.30 no.1
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• pp.50-57
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• 2017

This study aimed to investigate the morphological characteristics and optimal germination conditions in seeds of Arabis pendula L., a traditionally edible and medicinal plant. The external seed shape was circular-obovate with narrow wings and dark brown. The seed length and width were 1.25 mm and 1.47 mm, respectively. The seeds were exalbuminous and the embryo was a bent type. Seed germination was the highest (49.7%) at $20^{\circ}C$ under dark conditions among the various temperature and light conditions applied. However, under the dark condition, the seedling was weak, overgrown, and the cotyledons were small and folded. To improve the germination and growth of seedlings, the seeds were pre-treated with $GA_3$ solutions of varying concentrations (0, 200, 500, and 1,000 mg/L). The seed germination and seedling growth were effectively improved by $GA_3$ pre-treatment. The germination rate was the highest (97.3%), mean germination time was the shortest (8.1 days), and a vigorous growth of seedlings was observed upon pre-soaking the seeds in 500 mg/L $GA_3$ solution. In conclusion, the best method for germination was pre-soaking in 500 mg/L $GA_3$ ($4^{\circ}C$, dark, 24 h) and incubating the seeds at $20^{\circ}C$ for 15 days.

• Journal of the East Asian Society of Dietary Life
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• v.10 no.2
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• pp.129-135
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• 2000

This study was attempted to develop dandelion tea under various roasting conditions. The quality properties of tea were evaluated by measuring soluble solid. total yield, pH, color value, turbidity, browning degree, and sensory evaluation induced by various roasting time and temperature. The total yield and soluble solid content were the highest at the roasting process at 23$0^{\circ}C$ for 10 min. pH value was higher in non-treatment than pre-drying treatment and was not different among the roasting times. L value was reduced with increasing roasting time. Turbidity and browning degree of dandelion tea were the highest at the roasting condition at 23$0^{\circ}C$ for 10 min. Palatability was the highest at the roasting condition at 23$0^{\circ}C$ for 5 min without pre-drying. The higher solid yield was obtained with an increase in roasting temperature. Turbidity and browning degree increased under the roasting conditions at 230 and 26$0^{\circ}C$, respectively. Palatability in sensory evaluation increased at the roasting condition at 26$0^{\circ}C$ for 10 min. The higher savory taste value was obtained with an increase in roasting temperature.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.42 no.5 s.305
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• pp.1-10
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• 2005

Content-based image retrieval systems are being actively investigated owing to their ability to retrieve images based on the actual visual content rather than by manually associated textual descriptions. In this paper, we propose a novel approach for image retrieval based on edge structural features using edge correlogram and color coherence vector. After color vector angle is applied in the pre-processing stage, an image is divided into two image parts (high frequency image and low frequency image). In low frequency image, the global color distribution of smooth pixels is extracted by color coherence vector, thereby incorporating spatial information into the proposed color descriptor. Meanwhile, in high frequency image, the distribution of the gray pairs at an edge is extracted by edge correlogram. Since the proposed algorithm includes the spatial and edge information between colors, it can robustly reduce the effect of the significant change in appearance and shape in image analysis. The proposed method provides a simple and flexible description for the image with complex scene in terms of structural features of the image contents. Experimental evidence suggests that our algorithm outperforms the recently histogram refinement methods for image indexing and retrieval. To index the multidimensional feature vectors, we use R*-tree structure.