• Korean Journal of Plant Resources
• /
• v.30 no.1
• /
• pp.50-57
• /
• 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 Digital Convergence
• /
• v.18 no.8
• /
• pp.311-319
• /
• 2020

The purpose of this study was to investigate the effects of mineral taping containing natural minerals powder on knee joint pain and swelling in the elderly. Forty elderly people with knee pain were divided into 20 mineral taping groups and 20 kinesio taping groups and randomly placed in a single blind manner. The study period was conducted from April 6, 2020 to April 7, 2020, and pain and blood flow by time point were examined before, after, and after 1 day of taping. Knee pain was significantly different in the post-test (F = 93.758, p <.001) and the post-day test (F = 93.758, p <0.001) for each measurement point. The blood flow test for edema was significantly different in the post-test (F = 48.648, p <0.001) and the post-day test (F = 35,427, p <0.001) for each measurement time point. There was no significant difference in the effect test result for each group (F = 0.160, p> 0.05). However, When comparing the retention effect after 1 day, the mineral taping group was excellent to the post-score than the Kinesio taping group. In the future, we believe that increasing the taping time and retention period will have a positive effect. It is thought that the results of this study will contribute to the study of taping materials in the future.

• Korean journal of applied entomology
• /
• v.33 no.3
• /
• pp.148-152
• /
• 1994

This study was carried out to investigate insect specles of Kiwi fruit, and ecological characteristicsof Stathmopoda m Chonnam province from 1991 to 1993 Twelve families and thirteen specieswere identified during the study. Sfothmopoda aurijerello and mulberp scale were key insect pestsamong them. The body sizes of each stage of S. a~irijereilo was measured and found to be 0.12 mmfor egg, 9.8 mm for mature lawa. 5.9 mm for pupae and 123mm for adult with opened wings.S, ouriferelia appers to have two generations a yea Adults occut~ed from late May to midJulyand mid-August to early September Mth two peaks m early to midJune and late August. Changein age structure (% lawe: % pupae) over time was 100: 0 in earlyJul, 96. 1 . 3 9 in midduly. 64.9:35 1 in late July. 19.8 . 80 2 in early August, and 0 : 100 in mld-August Damaged fruit was 4 6%in early July, increase above 40% 1" midJuly, and then the damage surpassed the damage threshold.The rate of fruit damaged was 45.9%, and there wbi no significant dtfferences among countiesDamaged parts of fruits were manly fruit apex Mth 70% and followed by fruit stalk w~th 11.1%.The rate of fruit damaged by varieties were Hayward with 25.7%. Monty with 17 5%. Hyangrokwith 13.9%, Abott with 9.3% and Bruno with 6.0%. with 9.3% and Bruno with 6.0%.

• Korean Journal of Agricultural Science
• /
• v.21 no.1
• /
• pp.37-44
• /
• 1994

This study was carried out to investigate meat production ability of special poultry(Ogol fowl, pheasant and mallard). The results obtained Were summarized as follows ; 1. On the average live weight in male and female of Ogol fowl and mallard were 1,304.0~1,311.8g, 1,013.0~1,138.8g, respectively. The live weight of pheasant was lighter than that of Ogol fowl and mallard. The ratio of carcass to live weight in pheasant, Ogol fowl and mallard were 70.9~72.2%, 66.9~68.2% and 65.4~65.9%, respectively. 2. On the edible giblets ratio to live weight, the that of mallard was the highest(6.3%), while the that of Ogol fowl was the lowest(4.7~4.8%) in each individual poultry. 3. On the cut-up parts ratio to carcass weight, the neck(6.7~8.3%) and back(16.1~18.0%) ratio of pheasant were lower than that of Ogol fowl and mallard, but the neck(11.1~13.3%), wings(14.6~16.2%) and back(23.6~5.2%) ratio of mallard were higher than the others. 4. On the ratio of meat to breast and legs parts, the yield of breast meat was higher than that of legs meat of all poultries. In mallard, the skin ratio on both parts(17.6~22.9%) was higher than the others, while the bone ratio of pheasant and Ogol fowl(15.6~20.6) was higher than that of mallard.

• Journal of Fisheries and Marine Sciences Education
• /
• v.27 no.4
• /
• pp.1129-1135
• /
• 2015

The stow net is a stationary gear made from netting, usually in shape like trawl net without wings. The nets are fixed by means of anchors, placed according to the direction and strength of the current. And the commercial fishing is associated with high rate of fatal and non-fatal occupational injury. The hazard factors analysis for the fishermen's safety of offshore stow nets vessel was conducted to serve as a basic data for improving the healthy and safe working environment of fishermen using fishermen's occupational accidents of the national federation of fisheries cooperatives (NFFC) from 2012 to 2014 (n=1,144). As a result, the average occupational accident occurrence rate of this fishery was 206.9‰ in all industries 36.9 times the rate of that. In addition, average death and missing rate was found to have a very serious level management to 50.4‰ in all industries of death of 42.0 times. The accident occurred in 84.5 to 94.6% was happened at sea. The struck by object, slipping, contact with machinery, contact by object or gear and others occurred more frequently in order on the frequency of accident occurrence pattern. However, the occurrence rate of death and missing did not match the frequency of accident pattern. In other words, slipping occurred frequently higher while death and missing risk was not high. And the contact with fishing gear and fall in the waters was low while death and missing risk was high. The results are expected to contribute for identification and assessment of safety hazard occurred in offshore stow nets vessel.

• Journal of the Korean Geographical Society
• /
• v.41 no.1 s.112
• /
• pp.73-93
• /
• 2006

Despite of ecological and landscape importances and public popularity of Pinaceae, not much scientific informations are known about Korean Pinaceae. Present work aims to understand the biogeography of Korean native Pinaceae, i.e., taxonomy, phylogeny, origin, life form, distribution, dispersal and migration. Korean native Pinaceae consists of five genera and sixteen species. Pinus is systematically closely related to Picea and Larix, but Abies is related to Tsuga. Boreal conifers which have migrated from NE Asia during the Pleistocene glacial epochs successfully survived, but now confined to the alpine and subalpine belts of the Korean Peninsula mainly due to climate warming since the Holocene. Species, such as Picea pungsanensis and Abies koreana have gradually adapted to local environment, and later became an endemic species of Korea. Disjunctive distribution of Pinus parviflora and Tsuga sieboldii are also indicatives of climate change of the Pleistocene. Major dispersal agent of pine trees with winged seed is wind, but wingless pine tree seeds seem to dispersed by birds and rodents. Pine trees with bigger wings are easily dispersed by wind, and now show broader distribution. Species of Pinaceae with disjunctive distribution on the alpine and subalpine belts of both North and South Korea seems to be more vulnerable to global warming.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.46 no.9
• /
• pp.712-722
• /
• 2018

This paper conducts parametric studies on flapping wing design, one of the most important design parameters of insect-mimicking aerial vehicles. Experimental study on wing shape was done through comparison and analysis of thrust, pitching moment, power consumption, and thrust-to-power ratio. A two-axis balance and hall sensor measure force and moment, and flapping frequency, respectively. Wing configuration is biplane configuration which can develop clap and fling effect. A reference wing shape is a simplified dragonfly's wing and studies on aspect ratio and wing area were implemented. As a result, thrust, pitching moment, and power consumption tend to increase as aspect ratio and area increase. Also, it is found that the flapping mechanism was not normally operated when the main wing has an aspect ratio or area more than each certain value. Finally, the wing shape is determined by comparing thrust-to-power ratio of all wings satisfying the required minimum thrust. However, the stability is not secured due to moment generated by disaccord between thrust line and center of gravity. To cope with this, aerodynamic dampers are used at the top and bottom of the fuselage; then, indoor flight test was attempted for indirect performance verification of the parametric study of the main wing.

• Proceedings of the Korea Society of Poultry Science Conference
• /
• 2003.11a
• /
• pp.9-27
• /
• 2003

This study was performed to measure the effect of carotenoid polarity on absorption and Pigmentation in blood, muscle, and skin of laying hens. Carotenoids used in this study and Polarity were ${\beta}$-8-Apo-carotenoic acid ethyl ester(ACAEE) ＞ astaxanthin ＞ canthaxanthin ＞ ${\beta}$-carotene. The chickens used in this study were 61∼78 weeks old ISA brown laying hens. Experiment #1 was designed to measure the effect of carotenoid level on the accumulation of carotenoids in carcass of laying hens after feeding for 6 weeks. D-carotene was accumulated in skin only at a detectable level when it was fed at 300 mg/kg feed. The skin was pigmented as yellow when it was measured by colorimeter. The concentration of ${\beta}$-carotene in blood was proportional to that in the feed. Pigmentation of muscle by 9-carotene was not effective. Canthaxanthin significantly increased redness of the skin(p＜0.05). However, canthaxanthin did not pigment muscle. The level of canthaxanthin in the blood and skin increased as the concentration in feed increased. ACAEE at 200 and 300 mg/kg feed significantly increased yellowness of the skin(p＜0.05). At all levels of ACAEE used($\geq$50 mg/kg feed) the b values of colorimeter increased. With increases in the contents of ACAEE, the concentration of ACAEE in the blood and skin increased. Compared to ${\beta}$-carotene, ACAEE and canthaxanthin were absorbed 9- and 3-fold more into the blood, respectively. The concentration of ACAEE and canthaxanthin in the skin was 1/10 of those in the blood. The lower were the concentrations of carotenoids in the feed, the higher were the absorption rates(from feed to blood and from blood to skin) The results indicated that the higher was the polarity of carotenoids, the more effective were the absorption and pigmentation. In experiment #2, the effect of carotenoid levels of feed on the accumulation of carotenoids in each body part of laying hens was determined. The colorimeter values for redness and yellowness significantly increased when canthaxanthin was fed at $\geq$50 mg/kg feed(p＜0.05). Breast and thigh were not affected by feeding of canthaxanthin at the levels used. The L values of muscle but not the a and b values were significantly affected by feeding at $\geq$200 mg/kg feed for wings and breasts, respectively. The yellowness of skin and muscle significantly increased when ACAEE was fed at $\geq$ 100 and $\geq$ 200 mg/kg feed, respectively(p＜0.05).

• Korean Journal of Breeding Science
• /
• v.42 no.3
• /
• pp.248-251
• /
• 2010

A lemon double freesia (Freesia hybrida Hort.), 'Shiny Lemon' was developed from a cross between the domestic breeding lines ('Golden Crown' and 'White Wings') and 'Yvonne' followed by seedling and line selections at the National Institute of Horticultural and Herbal Science, Rural Development Administration (RDA) in 2007. Growth and flowering characteristic tests were conducted from 2003 to 2006. 'Shiny Lemon' has large double type flower with lemon color (RHS Y13D). It has multiple florets, good flower shape, and upright leaves and stalks. The average cut flower yield of 'Shiny Lemon' was 7.1 cuttings per plant in the greenhouse from 2005 to 2007. Additionally, it has good production of cormlets and vigorous growth. 'Shiny Lemon' could be cultured under greenhouse conditions in Korea.

• The Journal of Korean Philosophical History
• /
• no.58
• /
• pp.245-278
• /
• 2018

The paper has focused on examining the sense of educational process in the light of Xugua zhuan[序卦傳], the Sequence of the Hexagrams as one among Ten Wings in I Ching, particularly on the 11 Iching-hexagrams from ch'ien[乾] to t'ai[泰]. The process involved in this part of the Book of Change can be recognized as both the micro and macro levels, which can eventually leads us to construct the circular system of thought[環相型]. This gives us a possibility to consider the values of education beyond the dualism such as intrinsic and extrinsic as well as traditional and progressive ones. Particularly some crucial defects from child-centered education have been critically examined so that the concept of education can be taken seriously in the light of the teacher-side. Thus this provides us a necessity to dub 'education' as '敎育', not as '兒育' in the Oriental context. As shown in the paper, the cosmic dual forces of I Ching also enables us to dissolve some conflicts arisen in the educational welfare system and situations, and then shows us why we should respect for the teachers' stances though we have to consider the interests of children to be educated. Thus we need to re-examine the content of the Book in the link with the Western systems of educational theory.