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Chollanamndo is an agricultural region. About 22 percent of the national grain is produced in this region, 59 percent of the people. compared with a 36 percent national average, engages in agriculture and 47 percent of the gross provincial product. comparing 25 percent of the national average. comes farm agriculture. Nevertheless, the level of farm income per farm js lower than the national average. The expansion of arable land per farm is very important for the farms in this region. In this regard. the author is going to give special attention first. to find how much avaiIable hillside land the province has ; second. to estimate the expected effects .of expansion of land per farm and increase in food production. as well as farm income per farrn in case of the-available hillside lands which are utilized for agricultural use; third to search for the reasons why such a good available resource has not been utilized ; and fourth, to generalize the acceptable policy measures for hillside land utilization. The findings of the study wiIl be summarized as foIlows. 1. In Chollanamdo , there are about 200,500 jungbo of available hillside land, of which about 51,000 jungbo is considered to be available for agricultural uses without great rifficulties. 2. Supposing these lands are brought into agricultural use, the acreage per ’farm wiIl be expanded from the present level of 8.<< danbo to 9.63 - danbo, accounting for about a 14.1 percent increase in acreage. The barley production. the only. one crop .considered, will be increasedto 63,950 ~ annnually, valued at about 6.6 billion won of farm income for Chollanamdo and 17,000 won per farm. Ofcourse, if the crops care for are differed by slopes of lands the expectation of increase iñ income would be much greater. 3. The study shows the main reasons for lower utilization of available hilIside lands are not the physical disadvantages of 뼈 land itself, but because of institutional restrictions. lack of will and negligence in policies for land use. 4. As a consepuence. the author suggests that the government .as well as. the farmer should recognize the importance and the possibilities of better utilization of hillside land. and pay for efforts to achieve its maximum uses.
The study on the recreations in the Hwaom Temple ground, of the Mt. Chiri National Park treats with Some tourist’ s response to the district and t1íe movement of the travellers • devoting on the development plan of the 'park and recreatloo ground. The results are summarized as follows: 1. Most visitors are from Chonnam and Chonbuk Province which accounts for 58.5%. and on the otherhand from the city of Seoul and Busan only 19~4% of the total. 2. The favorite season for travelling is autumn for 51. 7% . of the 'respondents. but actually most travellers were: in spring time. It.is the one reason that the season have two big festival days, that is Yagsu-Je and Buddha's birthday. 3. Intoxicating with the beauty of nature, sight seeing, emancipation from worldly concern, and promoting friendship are their most motivations of visiting this ground (47.7%). 4. Due to the uneven surface of the road, poor means of tranportation. along the lack of recreation facilities , 53.8% of the tourist complained that travelling was unleasant. and do not want to vist more. 5. 25% of the travellers complained of the inelegance of treeIess mountain along the entrance to the Hwaom Temple grounds, but after they reach there, they count the beautiful scenery and the stillness of the woods are instilling( 44.2%). 6. The most urgent service for this grounds are said as follows: 1) public latrine (23.6%) 2) recreation facilities (14.7%) 3) public telephone (13.7%) 4) portable water supply system (13. 1%) At present time, above facilities are lacking io. 7. They want such a indigenous trees for the road-side as the cherry tree( 42.5%), gingko tree(18.29-ó), ze]kova tree(12.6%) and camelJia(lO.8%). 8. During the seventy five days of the survey term, total of 23.700 persons visit this grounds and on the average 274.4 persons a day. on the date of ApriI 2O, 1973-the day has the festival Yagsu-Je when it was at its. peak. the park recorded 14.536 persons. A conclusion can be drawn that about 150.000 people are estimated to have visited. this scenic place in 1972 by taking 274 persons a day 00 the average and plus about 50, 000 persons in the two festvals, that is Yagsu-Je and Buddha’s birth day.
PLANNING AND DESIGN OF SEA DIKE (ON DEVELOPMENT OF ESTUARY BARREN) HYUNG-SOO KIM Dept. of Civil Engineering, College of Engineering,Chonnam University The development of Estuary Barren is finished, in general1y, when the section of sea Dike is designed and constructed after deciding the embankment !ine. Therefore, its planning and design of Sea Dike are important on development of Estuary Barren. Then I consider that the best way of its planning and design are as foIIows. At first, the selelction of embankment line is different by various conditions of tidal land. However, the stable of Sea Dike. The difficulty of earthwork, conservation of cultivated area and its protection are influenced by the section of embankment line. I think the below of one-third elevation of the difference between the rise and fall of the spring tide height is suitable for the ground height. After that, the shapes of embanked dike sections are plainly different by the condition of natural ground. On the soft ground, the lasge section is necessary and its calculation is to be decided by soil mechanics. But in this paper r dealt with the section of dike on the soft and hard ground and its planning only. For the design of its dike, I proposed to calculate the height of dike by H.W.L.O.S.T. maximum devation + wave height + free board by using the theory of wave and tide. Especially, r used the theory of creep up of wave for the calculation of the wave height. In the end. I introduce some experimental data of wave power for reference of stabIe calculation of dike. In the view point of above. I emphasize the Studg soil mechanics for Estuary Barren and its stabilization methods in future,
To identify the strains of Lactobacillus in dairy milk in Kwang Ju area, 200 milk samples were collected from the milk plant in Kwang Ju city. TOO 96 strains considered to be Lactobacillus were isolated and of these 70 strains were identified as Lactobacillus. The strains were identified into following five species of Lacobacillus; 38 strains of L. casei, 17 strains of L. acidophilus. 8 stains of L. plantarum, 4 strains of L. leicbmannii, and 3 strains of L. fermentum. The frequency of appearance to these strains was 54.3% for L. casei. 24.3% for L. acidophilus, 11.4% for L. plantarum, 5.7% for L. leichmannii, and 4.3% for L. fermentum respectively. Acid producing capacity and final acidity were investigated on the strains isolated whether the strains could be used as dairy starter. The coagulating time of milk was required 8~24 hours for L. casei, 12~72 hours for L. acidophilus, 24~72 hours for L. plantarum. and 48~72 hours for leichmannii and L. fermentum respectively. The final acidity on the strains showed 1.95% for L. casei, 1.67% for L. acidophilus, 0.72% for L. plantarum, 0.25% for L. leichmannii and 0.25% for L. fermentum respectively.
1. Stem height was 60~65㎝, when the plants were pruned to 1 cluster regardless of cultivar and plant density. Plants with two clusters were 80㎝ high in the density of 4.800 plants/l0a, and 100㎝ high in the densities of 7,200 plants and 1,000 plants/10a. Plants with three clusters were about 100㎝ high in the sparce plantings and 110㎝ in the dense plantings. Plants with four clusters were 120~130㎝ high in all the plant densities. Cultivar Ycungkwang had shorter stems than Daehyung-Boksoo #2 under dense planting. 2. Period of field occupation by tomato plants was 65 days in the plots of 1 cluster harvest and 75, 85 and 110days in the plots of 2,3 and 4 cluster harvest, respectively. 3. The time of first flower was June 23, July 3, July 15, and July 23 in 1,2,3. and 4 cluster cultivation respectively, that is, there was almost one month difference between 1 and 4 cluster cultivation. Difference due to cultivar and plant density was not significant. 4. Total period taken for harvest was 20 days in 1 cluster cultivation compared to 25 in 2 cluster, 35 in 3 cluster and 50 in 4 cluster cultivation. 5. Optimum plant density for highest yield was found to be 7.800/l0a in 1 cluster cultivation and 4,800/l0a in 2 and 3 cluster cultivation and 3,600/10a in 4 cluster cultivation.
The efficacy of Borpetella bronchiseþtica bacterin was evaluated in the commercial swine herds affected with the enzootic atrophic rhinitis(AR). In this study, nasal swab cultural examination, blood serum titer to B. bronchiseþtica antigen. and body weight of adjusted day from birth to 56 days post-partum were determined for individua1 pigs. Bacterin inoculation reduced the positive isolaticn rate cf causative organism in 8.6 % cf the piglet in group A(vaccinated 4. times on the sow and its piglets), 29.4.% in group B(vaccinated twice on the sow), 40.0% in group C (vaccinated twice on the piglets) , 42.9% in group D(vaccinated once on the piglets) and 53.7% in group E of nonvaccinated contro1s. Positive isolation rate of group A was significant1y different(p<0.05) from the nonvaccinated control group. The average body weight at 56 days post-partum reached a weight of 26.7 and 26.1kg of group A and C. respective1y and was significant1y higher compared with the nonvaccinated control group. Group A. full dose of vaccine inoculated,had an average serum-agglutinating titer ranged from 1: 160 to 1: 5120 in the piglet at 6 weeks post-partum.
This paper is a part of our effort to c1arify the reason why resistant varieties of pear in Naju area of Chonnam province have been broken down by Alternaria kikuchiana TANAKA which has never attacked the varieties. Effect on induction of resemblant black spot was investigated in 3 pear varieties, Isibsegi (Nijisseki), Mansamgil (Okusankichi) and HN-39 using mycelial homogenates and cultural filtrates of 3 isolates of A. kikuchiana isolated from each of their varieties. Resemblant black spot was induced more specifically in isolates of Isibsegi and HN-39 to variety Isibsegi, and isolate of Mansamgil to variety Mansamgil than any other relations when low concentration of mycelial homogenates or culture filtrates were treated in each pear varieties. In variety Isibsegi, it was induced more highly on young leaves than on matured ones, and in Mansamgil, vice versa. Substances contained in culture filtrates were stable to heat, and suppressed the seed germination of lettuce and tomato. From the results described above, it is consider I that break' down of resistant varieties occurred because of the difference of bost specific toxin caused by the differentiation of pathogenicity of A. kikuchiana.
The purpose of this thesis is to study on a statistical analysis in determining a functional relationship among economic factors. For the purpose, the followings are treated in this thesis. First, Many economic functions can be expressed as multiple regression model. Therefore, in chapter 2 the least square principle is considered in estimating regression equations and the result of the least square solution for regression equation is applied to polynomial equation. Second, in fitting a polynomial equation to a given data, a problem is what degree of polynomial should be adopted. In order to determine the order of degree, theories 。f analysis of variance and orthogonal polynomial are discussed in chepter 3. Third, those theories are applied to the “Monthly Farm Income" data, estimating .;and predicting the monthly income level Theory of regression analysis is discussed in Chapter 2. Multiple regression equation is =+ ⦁⦁⦁⦁⦁(1) Where = independent variable = Normally distributed with mean 0 common variance Equation (1) can be written in matrix form as the following. By well-known theorum of the least square method, the parameter vector β ’ =(, ) is estimated as the following . Since e'e=()'(y-) əe'e =X'y+X'X-0 =(X'X)⁻¹X'y Theory of polynomial equation is studied in chapter 3. ln order to estimate thecoefficients of polynomial equation equate Xi =X. in regression equation (1) and then apply the muItiple regressin theory to the estimation of polynomial equation. However, in estimation polynomial equation it has to be determined the order of degree in the polynomial by using orthogonal transformation on X axis and analysisof variance. The application of the theory mentioned above is made to the data “Monthly Farm Income" 1964. The polynomial equation obtained for the data is the forth degree equation. y =4.57-0.15x+O.1x² +O.03x³ +0.006. Where