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Sources of Long-term Industrial Growth and Structural Change in Korea, 1955-85 (장기적(長期的) 산업성장(産業成長) 및 구조변화요인(構造變化要因)의 분석(分析) (1955~85))

  • Kim, Kwang-suk;Hong, Sung-duk
    • KDI Journal of Economic Policy
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    • v.12 no.1
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    • pp.3-29
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    • 1990
  • Korean input-output tables for 1975 and 1985 are first deflated into 1975 constant domestic prices(hypothetical terms), and the constant price I-O data are used to decompose the sources of industrial growth and structural change during the 1975-85 period. Using the same methodology, our results for the 1975-85 period are then linked to the results for the earlier period(1955-75) in order to analyze and evaluate the "demand-side" sources of industrialization over the past three decades. The results from the decomposition of the whole economy indicate that over three decades(1955-85) the relative contribution of domestic demand expansion (DDE) to growth and structural change has continuously declined while the contribution of export expansion(EE) has generally continued to rise. The contribution of import-substitution(IS) which had been significantly higher than that of EE during 1955-63 declined substantially, remaining at an insignificantly low level during the period following 1963. Although it is well known that the government's industrial policy in the 1970s emphasized import-substitution in heavy and chemical industries, no significant changes in the export-oriented growth pattern could be observed even for that period, except for a minor decline in the relative contribution of EE. This may be attributed to the substantially larger, backward-linkage effects of EE than that of IS. The sources-of-growth decompositions for major branches of the manufacturing sector generally support the major conclusions derived from the decomposition for the whole economy. The IS contribution which had been significantly high in almost all manufacturing branches during the 1955-63 period declined to low levels in all but two branches, heavy industry and machinery, during the following period. On the other hand, the relative contribution of EE showed a continuous rise in almost all manufacturing branches(except food processing). Finally, the sources of growth for 1975-85 which were decomposed by detailed sub branches, are analyzed by correlating them with changes in relative prices and industrial protection rates by sub-branches for the same period. A major result is that contrary to general expectations, the EE contributions by sub-branch are not negatively correlated with the nominal rates of protection and/or the effective rates of protection for the same sub-branches. It is also found that no statistically significant, positive correlation exists between IS contributions and nominal protection rates or effective protection rates. These unexpected results may be explained by the peculiar nature of the Korean system of industrial incentives for the past period.

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Effect of Treatment Time and Concentration of Dikegulac on Lateral Branching and Growth of Rooted Cuttings in Rhododendron simsii 'California Sunset' (화학적심제 dikegulac의 처리시기와 농도가 Rhododendron simsii 'California Sunset' 삽목묘의 분지 및 생육에 미치는 영향)

  • Jung, Bo Young;Lee, Sung Chun;Lee, Seung Youn;Gu, Jin Hee;Lee, Jeong Sik
    • FLOWER RESEARCH JOURNAL
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    • v.17 no.2
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    • pp.101-105
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    • 2009
  • This study was conducted to investigate the effect of treatment time and concentration of a chemical pinching agent, dikegulac, on branches and growth of Rhododendron simsii 'California Sunset'. R. simsii 'California Sunset' developed lateral branches naturally but the number of them was few. Treatment of dikegulac delayed the terminal bud development, increased in size, the chlorophyll contents of the leaf, and the number of lateral branches in June. Especially, the number of lateral branches were better at $1,500mg{\cdot}L^{-1}$ dikegulac than the others. But growth in August of R. simsii 'California Sunset' was naturally lower than June, there was no effect of lateral branches by dikegulac.

Study on the Characterisitics of Flowering in Winter Rape (겨울유채의 개화습성에 관한 연구)

  • Young-Am Chae;Yong-Woong Kwon;Jung-Il Lee
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.26 no.3
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    • pp.269-272
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    • 1981
  • To know the characteristics of flowering in rape, flower numbers, flowering speed, flowering period, pod numbers, pod formation period, and oil content were examined by individual plant and by each of branches per plant. The results are; 1) plant had in average 1, 400 to 1, 500 flowers, 2) completion of flowering per plant took 30 days, 3) pod numbers per plant was ranged from 560 to 630, 4) plant had 18 to 20 primary branches, 5) five days were needed for pod formation, 6) no difference in flowering speed by the position of branches, 7) flowering period was shortened by 0.5 days per branch by going to upper part, 8) oil content of seeds was significantly higher on the upper and lower part than on the middle part branches.

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Is conventional radiofrequency ablation of the superolateral branch, one of the three genicular nerves targeted as standard, necessary or not? A non-inferiority randomized controlled trial

  • Osman Albayrak;Canan Sanal Toprak;Osman Hakan Gunduz;Savas Sencan
    • The Korean Journal of Pain
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    • v.37 no.3
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    • pp.264-274
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    • 2024
  • Background: Radiofrequency ablation is an effective treatment modality in the symptomatic treatment of knee osteoarthritis. Our aim was to compare the efficacy of radiofrequency ablation of the superomedial and inferomedial genicular nerves (2 branches) with the superolateral, superomedial, and inferomedial genicular nerves (3 branches) and to show whether the 2-branch procedure is inferior to the 3-branch procedure. Methods: This study is a prospective, randomized, single-blind clinical study. Eligible participants were randomized into 2 groups: group A, which applied the procedure to the superomedial and inferomedial genicular nerves, and group B, which applied it to the superomedial, superolateral and inferomedial genicular nerves. Pain was evaluated with the numerical rating scale, quality of life with the Short Form-36 (SF-36), and disability with the Western Ontario and McMaster Universities (WOMAC) Osteoarthritis Index before, and at 1 and 3 months after the procedure. Results: A total of 41 patients were included. There were no differences between the groups except for the SF-36 physical health sub-score at baseline. A significant improvement was seen in the numeric rating scale (NRS) score, SF-36 sub-scores, WOMAC Index total, as well as pain and physical function scores in both groups, though no significant difference was detected between the groups during follow-up. Conclusions: Although we were unable to establish the noninferiority of conventional radiofrequency ablation (CRFA) applied to 2 branches to CRFA applied to 3 branches, in this trial, significant and similar improvement was observed in NRS, WOMAC total, pain, and physical function and SF-36 scores in both groups.

Effects of Vegetation Mat Conditions on Growth Characteristics of Six Sedum Cultivars (식생매트 조건이 상록성 Sedum 6품종의 생장 특성에 미치는 영향)

  • Nam, Yu-Kyeong;Lee, Jin-Hee;Park, Young-Seuk
    • Journal of agriculture & life science
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    • v.46 no.2
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    • pp.35-42
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    • 2012
  • This study was conducted to investigate growth responses at 45 days after cutting in six Sedum cultivars (S. reflexum 'Blue Spruce', S. rupestre 'Angelina', S. sexangulare, S. sexangulare var. elatum, S. spurium 'Atropurpureus', S. takesimense) using vegetation mats (individual coir tape and jute treated with different thicknesses and soil compositions) to broaden usefulness of evergreen Sedum cultivars. All the treatments including both single and interaction between treatments showed significant effects (p<0.001) on the number of branches, plant height, and shoot fresh weight except the number of branches treated with different mat types. No. of branches was showed two times in compost than in sand regardless of cultivars and mat types with the exception of S. takesimense showing no added branches in all treatments. Each plant height of all the cultivars except 'Angelina' showed the highest value under the conditions treated with 5 mm thick coir tape using compost. The fresh weight of 'Blue Spruce' treated with 5 mm thick coir tape using compost was 13.19 g of which value was the highest in all treatments. The better growth response in all Sedum cultivars was shown in the treatment of 5 mm thick coir tape than with jute net treatment.

Effect of Girdling on the Flowering and Yield in Scion Rooted 'Shiranuhi' Mandarin grown in Plastic Film House (부지화 자근발생 감귤나무의 착화와 수량에 미치는 환상박피의 영향)

  • Kang, Seok-beom;Moon, Young-eel;Han, Seung-gab;Lee, Hye-jin;Choi, Yeong-hun
    • Korean Journal of Environmental Agriculture
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    • v.35 no.4
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    • pp.256-262
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    • 2016
  • BACKGROUND: 'Shiranuhi' mandarin is one of the popular citrus cultivars in Jeju Island, Korea. However, the emergence of scion roots since the past few years has altered its flowering, fruiting, and quality. Girdling of branches is one of the methods of increasing flowering in citrus trees. METHODS AND RESULTS: This experiment was conducted to determine the effect of girdling on the flowering and yields of scion rooted 'Shiranuhi' mandarin hybrid. We selected normal trees without scion roots as controls. The trees with scion roots were divided into two groups: trees without girdling and with girdling on main branches. Each group contained five replications and the experiment was conducted in Gosan and Harye of Jeju Island. The scion rooted trees revealed severely decreased flowering and low flowering/leaf ratios; however, the leaf/fruit ratio significantly increased. But, girdling on main branches significantly increased flowering and the flowering/leaf ratio. In the scion rooted trees, yields dropped due to poor flowering; however, girdling of branches efficiently improved the yields of the trees. Fruit quality, fruit size, and fruit weight of scion rooted trees were low in comparison with the control, whereas girdling of the branches improved flowering and the fruit weight to some extent. No significant difference in soluble solid contents was observed. CONCLUSION: Girdling is an effective method to induce flowering of the scion rooted 'Shiranuhi' mandarin trees. In addition, yields of scion rooted trees were improved.

Comparison of Quality Characteristics of Dohwaju Fermented with or without Peach Flowers and Branches (복숭아 꽃과 가지 첨가 유무에 따른 도화주의 품질 특성 비교)

  • Park, Ji-Hye;Yeo, Soo-Hwan;Jeong, Seok-Tae;Kim, So-Ra;Choi, Han-Seok;Kang, Ji-Eun;Choi, Ji-Ho
    • Journal of the East Asian Society of Dietary Life
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    • v.22 no.5
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    • pp.649-656
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    • 2012
  • We investigated the quality characteristics of dohwaju (fermented with peach flowers and branches, a Korean traditional alcoholic beverage) containing different sub-ingredients. During fermentation, the inner temperatures of the added sub-ingredient treatments were higher compared to non-treatment, and only peach branches treatment. showed the highest inner temperature. There were no significant differences in the physicochemical results among the treatments. pH decreased from the first mashing day to the second and then increased slightly until fermentation was terminated. Total acidities showed opposite patterns as compared to pH level. Amino acid contents, soluble solids, and alcohol contents increased steadily until the end of fermentation, whereas reducing sugar contents showed the opposite trend. In a preference survey, DB (only peach branches)-treated dowhaju showed the highest evaluation in terms of taste and overall acceptability with walues of $5.07{\pm}1.38$ and $5.57{\pm}1.16$, respectively. Based on the results of this study, we concluded that only peach branches treatment is optimal for the manufacture of dowhaju. We expect that the quality of dowhaju can be improved by providing basic information concerning its manufacture.

Studies on the Harvest Methods for the Branch-rearing in Autumn (추기의 가지뽕 수확방법에 관한 연구)

  • 김문협
    • Journal of Sericultural and Entomological Science
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    • v.16 no.1
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    • pp.49-55
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    • 1974
  • Studies on the harvest methods for the branch-rearing in autumn are as follows. (1) It turned out to be the best method in the early autumn to thin one to two of the normal branches or the dwarf ones, or pick off some of leaves for the yields, according to the rearing scale. (2) For the rearing of the silkworm larvae at 4th instar, it is recommendable to apply one of the following harvest methods, such as the thinning of dwarf branches, the thinning of some branches, intermediate cutting, and the pick-of of the leaves at low part of mulberry in the regards io the quality of leaves and the labour conditions, and no effects on the harvest. (3) For the rearing of the larvae at 5th instar, it is most practical to adapt one of the yield methods which can produce good harvest with less labours. That is, the pruning. of the middle branches should be gradually made from a part of the mulberry fold. (4) When it is carried out to pick of the leaves on the branches which was left after the middle-pruning harvest in autumn or late, easy and less labours' harvest method of rough picking may be applied in the both of the mulberry pruned in summer or autumn.

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Effects of Germanium Treatment on Germanium Concentration and Flower Development in Winter Pruned Branches in 'Niitaka' Pear Trees ('신고'배 과원에서 게르마늄 처리방법이 동계전정된 가지의 게르마늄 함량과 화아에 미치는 영향)

  • Choi, Hyun-Sug;Kim, Wol-Soo;Kim, Tae-Yeon;Choi, Kyeong-Ju;Lee, Youn
    • Korean Journal of Organic Agriculture
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    • v.18 no.4
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    • pp.549-557
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    • 2010
  • This study was established on which germanium (Ge), known as one of the functional nutrients, treatment is the most effective method for increasing Ge uptake and contributing flowering development in the pruned branches in the winter. Ge treatment included foliar application, soil fertigation, trunk injection, and the three-combined application. Ge concentration in the pruned branches was greater on the three-combined treated trees, and Ge treated branches had greater Ge concentrations than the control. Pruned branches grown in the solution culture had greater bud weight and bud scale number on the Ge treated trees than the control. Ge treatments increased flowering per branch and flower number per bud as well as improved resistance of the freezing temperature damage. Overall, there were no consistent results of all the variables by the Ge application methods.