• KOREAN JOURNAL OF CROP SCIENCE
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• v.40 no.1
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• pp.59-68
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• 1995

Investigated were the relationships between plumule elongation characteristics and seedling emergence of 46 varieties including native, improved and red rice varieties of Korea, and varieties from U.S.A., Italy, India, Japan under 1, 3, and 5cm deep sowing with irrigated and non-irrigated condition. Experiments were carried out in paddy field of sandy loam. There was heavy shower of 19.2mm on the next day of seeding and thereafter, clear and dry weather continued during the experiment period. Soil temperature averaged over 30 days after seeding was $16.4^{\circ}C$ at 3cm depth. Soil hardness increased linearly up to 2.5kg /$cm^2$ on the 14th day after seeding, on which date irrigated plot was irrigated through furrow, and up to 4kg / $cm^2$ on the 28th day in non-irrigated plot. Soil hardness dropped near to 0kg /$cm^2$ after irrigation and developed up to 2.5kg /$cm^2$ again by 28 days after seeding. Seedling emergence was higher in irrigated plots than non-irrigated plots at all seeding depths. Korean improved varieties were substantially lower in seedling emergence under non-irrigated condition of 1 cm deep sowing than those under irrigated condition. This poor seedling emergence resulted mainly from delayed emergence by exposing them to greater soil strength. Percent seedling emergence under irrigated and non-irrigated condition showed signifi-cant correlations at 3 and 5 cm deep sowing. Korean improved varieties belonged to the group of poor seedling emergence, and I taliconaverneco, Chinsura Boro and Weld Pally to best group under both irrigation conditions at 3 and 5cm deep sowing. Seedling emergence showed highly signifi-cant positive correlation with the plumule length of mesocotyl ＋ 1st internode ＋ incomplete leaf and of mesocotyl＋coleoptile. Among the characters constituting plumule length, incomplete leaf length showed greatest positive correlation followed by coleoptile and mesocotyl under irrigated condition at 3 and 5 cm deep sowing, and highest correlation with mesocotyllength followed by first internode and incomplete leaf under non-irrigated condition. Days to 50% seedling emergence at 1 cm deep sowing with irrigation showed great varietal variation of 10 to 30 days, and showed high significant negative correlations with percent seedling emergence under both irrigation conditions except for 1 cm deep sowing with irrigation, Days to seedling emergence revealed sig-nificant negative correlations with plumule characters except 2nd internode, showing highest cor-relation with incomplete leaf length.

• Journal of Animal Science and Technology
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• v.54 no.2
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• pp.141-147
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• 2012

The present survey was conducted to provide basic information on Hanwoo calf management. Eight hundred and sixty-two Hanwoo breeding farms from all nine provinces were surveyed via personal interviews. The percentages of farms categorized by herd size were 30.5%, 32.8%, 26.0% and 10.7% for <50 heads, 51-100 heads, 101-200 heads, and >200 heads, respectively. More than 50% of farms offered calf starter at 6-10 days of age, showing that calf starter was offered relatively at an earlier age. Calf starter was replaced every three days by 30.1% of farms. The percentages of farms replacing starter weekly (19.2%) were even higher than those of replacing starter daily (18.8%), suggesting that the frequency of replacing starter needs to be increased to maintain starter freshness and to increase starter intake. About one-third of farms offered forage at 6-10 days of age and 21% of farms offered even at 1-5 days of age although it has been well known that forage does not contain either nutrient density or nutrient profile necessary to stimulate rumen papillae development, especially before weaning. Furthermore, about half of farms used rice straw with calf starter. Water was offered relatively at an earlier age (1-5 days of age) by 55% of farms. Deciding when to wean calves should be based on starter intake rather than age but less than 50% of farms decided weaning age by starter intake. In conclusions, to reduce weaning age of Hanwoo calves by rapid rumen papillae development it is necessary to provide fresh starter and water by increasing frequency of starter replacing and water trough cleaning and not to feed forage before weaning.

• Food Science and Preservation
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• v.20 no.6
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• pp.827-833
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• 2013

In this study we investigated physicochemical properties of Zanthoxylum schinifolium seeds oil base extracts. Supercritical fluid extraction (SFE), roast pressure (RPM) and steam pressure (SPM) method were used for oil base extracts. The pressure and temperature conditions of SFE method were $70{\sim}80kgf/cm^2$ and below $30^{\circ}C$, respectively, by newly designed SFE-$CO_2$ system. The yield of extraction was 38.5% at the SFE method and others were 30% in each. Refractive index of oil base extracts, there was also no difference between them as 1.470~1.473. At the SFE method, viscosity observed higher value better than two method that showed as 181.88~209.93 according to the extraction time. Three oil base extracts showed difference in color which was low in b value at SFE, especially. The result of acid value at RPM that was lower as 0.93 mg/g than 2.36~2.64 mg/g of SFE method. Saponification value ranged $182.96{\sim}196.57mg{\cdot}KOH/g$ in three extraction method. At SPM, TBA value showed as 158.96 mg/kg, but in the SFE method ranged higher value as 201.30~347.14 mg/kg. Fatty acids analysed with 18 varieties in all oil base extracts and the composition of saturated/unsaturated fatty acids was 17:83(v/v) at SEF. Especially, ${\omega}$-3,6,9 fatty acids observed at SFE and SPM, but did not appeared at RPM. Fatty acid of ${\omega}$-6,9 detected in all cases.

• Journal of the Korean Association of Geographic Information Studies
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• v.19 no.3
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• pp.61-74
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• 2016

The purpose of this paper is to analyze the relationship between the location of the epicenter of a medium-sized earthquake(magnitude 4.8) that occurred on January 20, 2007 in the Odaesan area with lineament features using a shaded relief map(1/25,000 scale) and satellite images from LANDSAT-8 and KOMPSAT-2. Previous studies have analyzed lineament features in tectonic settings primarily by examining two-dimensional satellite images and shaded relief maps. These methods, however, limit the application of the visual interpretation of relief features long considered as the major component of lineament extraction. To overcome some existing limitations of two-dimensional images, this study examined three-dimensional images, produced from a Digital Elevation Model and drainage network map, for lineament extraction. This approach reduces mapping errors introduced by visual interpretation. In addition, spline interpolation was conducted to produce density maps of lineament frequency, intersection, and length required to estimate the density of lineament at the epicenter of the earthquake. An algorithm was developed to compute the Value of the Relative Density(VRD) representing the relative density of lineament from the map. The VRD is the lineament density of each map grid divided by the maximum density value from the map. As such, it is a quantified value that indicates the concentration level of the lineament density across the area impacted by the earthquake. Using this algorithm, the VRD calculated at the earthquake epicenter using the lineament's frequency, intersection, and length density maps ranged from approximately 0.60(min) to 0.90(max). However, because there were differences in mapped images such as those for solar altitude and azimuth, the mean of VRD was used rather than those categorized by the images. The results show that the average frequency of VRD was approximately 0.85, which was 21% higher than the intersection and length of VRD, demonstrating the close relationship that exists between lineament and the epicenter. Therefore, it is concluded that the density map analysis described in this study, based on lineament extraction, is valid and can be used as a primary data analysis tool for earthquake research in the future.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.44 no.4 s.316
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• pp.60-69
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• 2007

The human eye usually experiences a loss of color sensitivity when it is subjected to high levels of luminance, and perceives a discrepancy in color between high and normal-luminance displays, generally known as a hue shift. Accordingly, this paper models the hue-shift phenomenon and proposes a hue-correction method to provide perceptual matching between high and normal-luminance displays. The value of hue-shift is determined by perceived hue matching experiments. At first the phenomenon is observed at three lightness levels, that is, the ratio of luminance is the same between high and normal-luminance display when the perceived hue matching experiments we performed. To quantify the hue-shift phenomenon for the whole hue angle, color patches with the same lightness are first created and equally spaced inside the hue angle. These patches are then displayed one-by-one on both displays with the ratio of luminance between two displays. Next, the hue value for each patch appearing on the high-luminance display is adjusted by observers until the perceived hue for the patches on both displays appears the same visually. After obtaining the hue-shift values, these values are fit piecewise to allow shifted-hue amounts to be approximately determined for arbitrary hue values of pixels in a high-luminance display and then used for correction. Essentially, input RGB values of an image is converted to CIELAB values, and then, LCh (lightness, chroma, and hue) values are calculated to obtain the hue values for all the pixels. These hue values are shifted according to the amount calculated by the functions of the hue-shift model. Finally, the corrected CIELAB values are calculated from corrected hue values, after that, output RGB values for all pixels are estimated. For evaluation, an observer's preference test was performed with hue-shift results and Almost observers conclude that the images from hue-shift model were visually matched with images on normal luminance display.

• Korean Journal of Ecology and Environment
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• v.40 no.1
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• pp.163-172
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• 2007

In this study, fish fauna and stream characteristics were surveyed during October-November 2003 in 31 small streams, which are small sub-tributaries of Geum River. The small streams were classified into 4 types of steep mountainous (SM), mountainous-flatland (MF), flat land (FL), and agricultural watercourse (AW) streams, and their types were categorized by features of stream width, water depth, bottom substrate, riparian vegetation, and landuse patterns. The fishes collected during this survey were identified 4 families and 8 species. Dominant family was Cyprinidae, and the most dominant species was Rhynchocypris oxycephalus with 73% (419 individuals) of the total. Only one species of R. oxycephalus was observed in the all five steep mountainous streams, which was surrounded by 100% forest area and had no point-and non-point pollution sources. The observed frequency of R. oxycephalus (as a relative proportion of species) showed a significant positive correlation (r=0.754, p<0.001, n=31) with the substrate composition of bedrock and boulder, indicating that the species prefer the bedrock and boulder rather than the sand or small pebble. Evidently, all five steep mountainous streams were judged as excellent condition (1st rank) according to the criteria of biological water quality, the Ministry of Environment, Korea. This result was accord with a general tendency of the species in most upper stream of the Koreas streams. One family and one species were found at the steep mountainous types and 4 families 6 species were at the mountainous-flatland. Four families 8 species were found at the flat land, which showed most diverse habitat, and 2 families 2 species were collected agricultural watercourse. These study results of 1st-order streams suggest that R. oxycephalus was considered as one of 1st rank ecological indicator species, and that the dominant area should be protected from various pollutions and disturbances.

• The Korean Journal of Nuclear Medicine Technology
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• v.16 no.1
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• pp.91-95
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• 2012

Purpose: In this study, we evaluated the ejection fraction (EF) according to the difference of patient position in Gated Blood Pool (GBP) scan. Material and Methods: The analysis was performed to 80 patients ($51.2{\pm}17.4$ years old) who examined GBP scan in Department of nuclear medicine, National Cancer Center from March 2011 to August 2011. We divided the patients into two groups; one group received conventional position (raise left arm up supine) and supine position (group 1) and the other group received conventional position and left arm back down supine position (group 2). To observe the change EF according to patient position difference, the image was reconstructed and analyzed by Xeleris (GE, USA). We measured body mass index (BMI) of patients. Result: In group 1, EF error less than 3% occurred at a rate of 72.5% (29 of the 40 patients). In group 2, EF error less than 3% occurred at a rate of 79% (32 of the 40 patients). The patient's BMI did not affect ejection fraction. Conclusion: The EF error of left arm back down supine position closer to conventional position than in supine position shows the results.

• Clinical and Experimental Pediatrics
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• v.52 no.7
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• pp.798-803
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• 2009

Purpose : We aimed to examine the effectiveness of the head-up tilt test (HUT) for the diagnosis of syncope or presyncope in children and adolescents. Methods : HUT results and clinical features of 160 children and adolescents with syncope or presyncope were studied from May 2003 through March 2008 at the Chonbuk National University Hospital. The children and adolescents were subjected to $70^{\circ}$ HUT for 45 minutes. The testees were divided into 2 groups: group I (children) comprising 39 children in the age range 7-12 years (mean, $10.59{\pm}1.60$ years) and group II (adolescents) comprising 121 adolescents in the age range 13-20 years (mean, $15.93{\pm}2.28$ years). Positive result rates of the HUT and types of hemodynamic response to the test in the 2 groups were compared. Results : Of the 160 testees, 92 (57.5%) showed positive HUT results; they showed 3 patterns of response to tilting. Twelve patients showed a predominantly vasodepressor response; 10 patients showed a cardioinhibitory response; and 70 patients showed a mixed response. The positive result rates were 43.6% (17/39) and 62.0% (75/121) in groups I and II, respectively. Mixed response was the predominant positive hemodynamic response in both the groups. Conclusion : The HUT is a useful diagnostic tool for evaluating the condition of pediatric patients, including adolescents, with syncope. Further, it may be considered as the first step for evaluating the condition of such patients.

• Journal of Bio-Environment Control
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• v.19 no.2
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• pp.109-116
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• 2010

Chicons are kinds of sprout vegetables which forced from the roots of chicory (Cichorium intybus L.). Experiments were performed to investigate the proper cultivation period and region of chicories which are 3 different cultivars for improving storability of chicon. The fresh weight of chicon packed with 20 ${\mu}m$ LDPE film decreased less than 0.5% during the storage at $10^{\circ}C$ in all treatments, and Chuncheon region treatment and 'Focus' cultivar treatment showed higher fresh weight loss than the others. And it decreased higher, as the cultivation periods was longer. The oxygen content in film was from 8% to 17% during storage at $10^{\circ}C$. There was not any significantly different oxygen content among cultivar treatments and cultivation region treatments, but 100 days' cultivation period treatment showed the highest content than the others. The carbon dioxide content in film showed around 3% during storage at $10^{\circ}C$. It also did not influenced by cultivars and cultivation regions, but 100 days' cultivation period treatment showed the lowest content than the others. The ethylene content in film was changed dramatically from 2 to 14 ${\mu}l{\cdot}l^{-1}$, and it showed around 8 ${\mu}l{\cdot}l^{-1}$ as approaching to 21 days after storage at $10^{\circ}C$. The visual quality of chicon deteriorated below marketability level from 12 days after storage at $10^{\circ}C$, and that of 'Metafora' cultivars decreased the highest. That of Pyeongchang region treatment was kept higher, and 'Vintor' cultivar treatment showed highest visual quality than the others which were grown in Pyeongchang region. The firmness of chicon increased, as the cultivation period was longer regardless of cutlivars and cultivation regions. The russet spotting that is ethylene injury symptom of chicon appeared at the latter term of storage and was higher in Chuncheon region treatment. Conculsionally, chicory that is for producing chicon should be grown more than 120 days in Kangwon region and grown in high-land region like Pyeongchang to improve the storability of chicon.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.52 no.2
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• pp.146-152
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• 2007

The present study was carried out to investigate the potential acute toxicity of ethanol extracts of the aleurone layer of Oryza sativa cvs. Obongbyeo, Ilpumbyeo, and Aranghyangchalbyeo by a single oral dose in ICR mice. The test article was orally administered once by gavage to male and female mice at dose levels of 0, 2.5, 5.0, and 10.0 g/kg body weight (n=10 for male and female mice for each dose). We examined numbers of deaths, general signs, weight measurement and biochemical analysis for sexes and doses of mice control and experimental groups. All mice were alive during the experimental period so can not yield death rate and $LD_{50}$. Any significant clinical symptom was not observed in all treated groups. No significant body weight changes in treatment groups in comparison with those of control groups was observed at any dose levels in experimental groups. Plasma glucose levels were valued both control and treated groups and there were no significant differences between groups. The activities of ALT and AST were not increase in all sample treated groups when compared with the control groups. The results suggest that the toxicity of Oryza sativa cvs. Obongbyeo, Ilpumbyeo, and Aranghyangchalbyeo are low and its $LD_{50}$ is over 10.0 g/kg body weight in both male and female mice.