• Development and Reproduction
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• v.1 no.2
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• pp.173-180
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• 1997

This study has been conducted to investigate the molting behavior and the effects of rearing temperature and day length on molting in the behavior and the effects of rearing temperature and day length on molting in the giant freshwater prawn, Macrobrachium rosenbergii reared in the laboratory. The results obtained were summarized as follow: 1. After pre-spawning molting, the protopodites of 1st, 2nd, 3rd, and 4th except 5th pleopod bore new breeding setae which conserve eggs in the brooding chamber and the basis of 3rd, 4th, and 5th pereiopods bore new breeding dresses which transport the ovulated eggs into the brooding chamber. 2. Adult females reared in 27.5-$29.4^{\circ}C$ molted 10-12 times per year at interval of 27-35 days, of which four or six moltings were common molting for growth and another four or five moltings were pre-spawning molting for spwaning and brooding. In winter season, pre-spawning molting did not happen to most of adult females in spite of the same temperature. 3. Duration of intermolt cycle was 31-38 days and 26-30 days at 25.3- $26.5^{\circ}C$ and 28.7- $30.4^{\circ}C$ of rearing temperature, respectively.

• Journal of the Korea Fashion and Costume Design Association
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• v.5 no.3
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• pp.7-14
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• 2003

Fabrics dyed with artemisia extract have quite natural and elegant tones of color. This study purposed to find the best one for dyeing among artemisia collected in the four seasons in order to develop a more efficient method of dyeing with artemisia. As for the method of research, the researcher dyed wool fabric and silk fabric with artemisia, and measured dyeability according to the number of repeats of dyeing, coloration by post-mordant, color fastness to washing, color fastness to dry cleaning and color fastness to light. The results are as follows. 1. In dyeing with artemisia, dyeability was improved as the number of repeat of dying increased, and it was higher in wool fabric than in silk fabric. 2. Among artemisia collected in the four seasons, autumn artemisia had dyeability much inferior to that of artemisia from the other seasons, and winter artemisia had the best dyeability. 3. According to the result of treating fabric with post-mordant, the dyeability was improved significantly, and coloration was most remarkable when copper and iron mordant were used. 4. The color fastness to washing and color fastness to dry cleaning of fabric mordanted with artemisia were as high as grade 4-5 and grade 5 respectively. The color fastness to light was highest in winter artemisia as grade 4.

• Atmosphere
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• v.21 no.3
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• pp.243-256
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• 2011

This paper presents the development of new algorithm for identifying and tracking the convective cells in three dimensional reflectivity fields in Cartesian coordinates. First, the radar volume data in spherical coordinate system has been converted into Cartesian coordinate system by the bilinear interpolation. The three-dimensional convective cell has then been identified as a group of spatially consecutive grid points using reflectivity and volume thresholds. The tracking algorithm utilizes a fuzzy logic with four membership functions and their weights. The four fuzzy parameters of speed, area change ratio, reflectivity change ratio, and axis transformation ratio have been newly defined. In order to make their membership functions, the normalized frequency distributions are calculated using the pairs of manually matched cells in the consecutive radar reflectivity fields. The algorithms have been verified for two convective events in summer season. Results show that the algorithms have properly identified storm cells and tracked the same cells successively. The developed algorithms may provide useful short-term forecasting or nowcasting capability of convective storm cells and provide the statistical characteristics of severe weather.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.43 no.6
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• pp.751-755
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• 2010

To understand the function of nursery grounds, the seasonal variation of ichthyoplankton was investigated in the East Sea, off Dokdo, from September 2009 to May 2010. The dominant species was Engraulis japonicus (92.7%), which occurred in May and September. The next abundant species was Maurolicus japonicus (5.7%), found in all four seasons. Several rare warm-water species were found in September and November, when the species diversity was higher than in the other two seasons. Several fish species used Dokdo as a nursery ground for a restricted season, while M. japonicus used it in all four seasons.

• Journal of Plant Biology
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• v.7 no.1
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• pp.1-4
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• 1964

A comparative study of free amino acid content in healthy and virus diseased tobacco leaves was carried out by author throughout the gorwing season from June to November of 1963. The methods of qualitative analysis of free amino acids applied in this experiment is followed by Moore and Stein. 1,2 Free amino acids determined in this experiment are shown in Fig. Ⅰ, Ⅱ and Table Ⅰ. As the figure and the table are shown, four more amino acids such as a spartic acid, glutamic acid, tyrosine and phenylalanine are detected in the healthy leaves; these four additional amino acids in the healthy leaves are conspicuous. More quantities of asparagine and alanine are detected in the diseased leaves than the healthy leaves and more quantities of tryptophan is detected in the healthy leaves. It is presumed that such amino acids as tyrosine and phenyllanine are decreased by the incooperation of free amino acid to TMV protein in the process of the process of the leaf protein metabolism which is caused by TMV-RNA trapping action in the diseased leaf protoplasm. It is thought that the decrease of asparagine and the increase of asparic acid in the healthy leaves are the results of in incooperaton of NH2, produced by the protein dissimilation in the diseased leaves, to aspartic acid; it's reaction is caused by the respiration of the diseased leaves accelerated by TMV attack. It is presumed, consequently, that the check of the diseased tobacco leave growth is influenced by the reduction of such amino acids as tryptophane and glutamic acid, which reduction may be due to the abnormal protein metabolism and the action of certain enzyme caused by TMV attack on host protoplast.

• Journal of the Korean Society of Costume
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• v.60 no.10
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• pp.65-79
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• 2010

Each season, many clothing companies dump small pieces of fabrics left over from making samples. Since fabrics do not decompose easily, this results in environmental pollution. This research was done to discover effective ways to reuse these fabric remnants. As most of these remnants were not large enough for making clothes, fashion accessories was chosen as the design object. Four steps of design development process followed: information research & analysis, prototype design & sample making, market testing, final design decision. After market research and trend analysis, four neck decoration wear -- scarf & muffler(SM). collar & cape(CC), vest & top(VT), and necklace(NE) -- were selected as final product types. 45 designs arose, and 120 items with variations in fabric materials and colors were produced as samples. The three main themes (multiple. reversible, cross) were applied throughout all of the design items. Samples were evaluated from the reactions of the consumers through a 10-day sale at a retail store. Based on the sales record and customers' opinions, five designs from each of the product types SM, CC, and VT were picked out as final designs. In conclusion, fashion accessories turned out to be a more appropriate item to reuse fabric remnants from clothing companies than clothes were, because they necessitate small fabric size and the limitation in fabrics could be compensated with creative design ideas.

• Biomedical Science Letters
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• v.28 no.2
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• pp.83-91
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• 2022

This study was performed to investigate the contamination status of microorganisms that cause food poisoning in shellfish distributed in the metropolitan area of South Korea. The analyses were conducted according to the sample type, season, and region. In particular, the genotype of food poisoning viruses that explosively cause collective food poisoning was analyzed. Total 483 each of four types of shellfish (Crassostrea gigas, Mytilus coruscus, Pectea albicans albicans, and Scapharca subcrenata) were collected from four distribution sites located in the metropolitan area. We investigated foodborne pathogen by multiplex PCR and RT/Nested PCR from shellfish. As a result, Vibrio parahaemolyticus and Bacillus cereus were detected in 13 and 21 samples and Norovirus (NoV) GI and GII were detected in 7 and 12 samples, respectively. V. parahaemolyticus and NoV GI and GII showed differences in types of shellfish and seasons, and no correlation was confirmed with regional differences. Also, as a result of genotyping for the detected NoV GI and GII, they were confirmed as NoV GI.7, GI.5 and GII.3, which are causes of collective food poisoning. Therefore, cross-infection with shellfish can cause food poisoning. In particular, attention must be paid to the handling and cooking of shellfish in organizations that implement group feeding, and it is necessary to establish a management system for microorganisms that cause food poisoning in the process of shellfish farming and distribution.

• Journal of the Korean Society of Clothing and Textiles
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• v.47 no.2
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• pp.244-255
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• 2023

Patterns abstractly depicting flowing water with Chinese characters such as gong, wan(man), or wang continued endlessly and curved water patterns began appearing on textiles during the Song Dynasty. Though Song curved water patterns encompassed poetic sentiments such as "falling flowers and flowing water," the meaning faded with time, and these patterns were depicted in backgrounds with flowers added to brocade (Geum-sang-cheom-hwa). During the Ming and Qing Dynasties, combinations of diverse patterns, including flowers, butterflies, dragons, and auspicious treasures became fashionable, rather than the gong- and wan-shaped curved water patterns. Likewise, during the Joseon Dynasty, curved water patterns were preferred as background rather than as primary patterns. They were overlaid with flowers and clouds. The overlaid flower patterns included four-season flower patterns (17th-18th centuries), round flower patterns (19th century), and large flower patterns (20th century), which were identical to flower patterns fashionable at the time and arranged at intervals on complex curved water pattern backgrounds. In contrast, simple Ruyi types were more numerous than the four-Ruyi types fashionable at the time with regard to cloud patterns. Added here were Taiji (great ultimate symbol) or crane patterns, thus seeking to depict diverse auspicious Ruyi such as wish fulfillment and longevity.

• Journal of the korean society of oceanography
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• v.31 no.4
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• pp.217-231
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• 1996

The distribution patterns of the benthic macrofauna of Han Estuary and Kyonggi Bay and the controlling environmental factors were studied at twenty-five stations in spring and fall of 1989. As a result, four biological groups were established as follows : Crassostrea gigas-Balanus reticulatus (Group I), Heteromastus filiformis-Mediomastus californiensis-Lumbrineris spp. -Sternaspis scutata-Tharyx sp. 1-Diopatra bilobata (Group II-A), Haustoriids-Phoxocephalids-Moerella rutila (Group II-B) and Nephtys chemulpoensis (Group II-C in March) and indistinctive group which was composed of common species (II-C in September). Results of the habitat analysis revealed that most of the dominant species showed narrow ranges of habitat niche in March and relatively wide ranges in September. Based on multiple discriminant analysis, the critical environmental factors governing their distributions are salinity in the regions of Yomha and Sokmo Channel in Han Estuary and sediment types in Kyonggi Bay. Also, sediment instability during the rainy season due to run-off was assumed to play a major role in the species composition of the benthic communities and their distribution in the study area.

• Journal of Fisheries and Marine Sciences Education
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• v.7 no.1
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• pp.31-43
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• 1995

For the fuel saving in the fish farm, the heat transfer performances of various tubes, XL-tube, copper-tube, copper-Nikel-tube and Al-brass-tube, were compared. The XL-tube, which is most commonly used for heating water, showed the poorest heater transfer performance, while the Al-Brass tube shows the best performance. As far as average temperature difference of four tubes concerns, XL-tube is $3.34^{\circ}C$, Copper tube is $10.34^{\circ}C$, Copper-Nikel tube is $11.3^{\circ}C$, Al-Brass-tube is $12^{\circ}C$, The best heat transfer performance of Al-Brass tube results from the enhancement of heat transfer coefficient caused by fin effect and good conductivity of the material.