• 아시안잔디학회지
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• 제10권1호
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• pp.1-11
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• 1996

Fifty accessions in Zoysia species and forty-one hybrid lines were evaluated in order to detect analyze the genectic variation of Zoysiagrasses and to obtain the basic information for breeding. 1.Plant height ranged from 13 to 34.5cm, leaf length from 7 to 26cm, leaf width from 2 to 7mm, and first leaf height from 1.1 to 8.5cm 2. The correlations among plant height, leaf length and first-leaf height were high, but leaf Width was correlated only With leaf length. 3. Stolon length was varied from 10 to 108cm, number of stolons from 12 to 53, internode length from 2 to 6.1cm and coverage percentage from 10 to 90%. 4.There were correlation among stolen length, number of stolons, internode length and coverage percentage except between stolen and internode length. 5.M1J and MC2 showed the highest level in stolen length, number of stolons and coverage percentage. Therefore they will be the best breeding materials for the purpose of fast covering. 6.According to the analysis on October 26, 1995, yellow color-change rate of leaves ranged from 5 to 85%, red color-change from 0 to 75% and sum of yellow and red change from 20 to 95%. Speciallty M2M1 and FL-41 kept green color untill early December, indicating that they had the late dormancy. 7. Visual assessment of stolon length and number of stolons, showed similar tendency With actually measured data. 8. Shoot density was very high in M2M1 and S2, and showed negative correlation with leaf width. 9. It is known in Korea that the darker green color of lawngrass is, the better it looks. There were 11 lines with dark green color leaves such as J 85-10, Meyer in Z. japonira, one asacession in Z. matrella and M2M1, M2S8, JM2, 55C2 in hybrid lines.

• 복식문화연구
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• 제2권1호
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• pp.167-186
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• 1994

The purpose of his study is to investigate the relationship between the business cycle and the fashion of silhouette from 1956 to 1992. Correlation analysis an regression analysis were used to investigate the relation of them. In this study, the coincident composite index was used as business cycle and change of skirt in length and width, collar and pants in width wee thoroughly checked through graphs and photographs. The results of analysis are as follows. 1. When the economy is to ascend, the skirts are short and narrow. On the country, when the economy is descend, they are long and wide. 2. The business cycle gives influence on skirts line and with, that is, about 18%, 33% of total changes. 3. In change of fashion, skirts length and width had significant positive correlation and they showed a tendency to move together. On the other hand, the change of collar and patterns in width have no connection with business fluctuation. 4. The change of fashion is affected by the movement of itself. According to analysis that includes the trend of skirts, about 50%, and 35% of changes in skirts length and width were decided by them,. and about 52% and 35% of change in collar and patterns width were decided by them.

• 대한후두음성언어의학회지
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• 제17권1호
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• pp.14-16
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• 2006

Background and Objectives: The purpose of this study is to investigate the change of vocal tract length according to the level of the pitch by the singers. Materials and Methods: Fifteen tenors were asked to produce successive /a/ sound in G4(382Hz) for the head register, C3(131Hz) for the chest register and usual speaking sound. The control group consisted of 15 males of an similar age who are not professional singers. The length of vocal tract was calculated by applying the formula of Fn=(2n-1) c/4L(F : formant frequency, c : the speed of sound in the vocal tract(350m/sec), L : length of vocal tract, $n=1,2,3,4,{\ldots}{\infty}$). Results: In singer's group, there showed no significant statistical difference of length among head and chest register and usual speaking sound. However in the control group, there showed statistically significant difference of length. Comparison of the absolute difference in the length of vocal tract by changing level of pitch in phonation, between the control group and the singers group. Changing from G4 phonation to C3 phonation and C3 phonation to usual speaking sound showed statistically difference of vocal tract length was less in the singers group than the control group. Conclusion: The change of vocal tract length, in either speaking or singing, was less in singers than the control group. We could assume that the singers maintain their larynx position constantly throughout the pitch range when phonation.

• 건축역사연구
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• 제25권3호
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• pp.23-35
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• 2016

The purpose of this study is to classify types of the eaves structure of buildings with the Jusimpo-type structure and to analyze the characteristics of each eaves structure. For this objective, forty buildings were selected and investigated. The results of analysis are summarized as follows. First, the main members of framework which handle a load burden on the long-rafter(長椽) are classified as the Jusim-dori(柱心道里) and the Oemok-dori(外目道里). Based on the method of handling a load, the eaves structure is classified into three types; the Jusim-processing-type(柱心中心形), the Oemok-processing-type(外目中 心形), and the Oemok-processing-variant-type(外目中心變異形). The Jusim-processing-type is the set where the internal length of a long-rafter is longer than the length of the eaves on the basis of the center of a column. The Oemok-processing-type is the set where the external length of a long-rafter is longer than the internal length of it. And the Oemok-processing-variant-type is the set where the internal length of a long-rafter is longer than the external length of it, but it is shorter than the length of the eaves which includes the extruded length of a Buyeon(浮椽). Second, the Jusim-processing-type had been generally adopted in the Jusimpo-type structure of the Goryeo Dynasty. But since the 17th century, the Oemok-processing-type had the highest application rate. Third, the change from the Jusimdori-processing-structure to the Oemokdori-processing-structure means that the long-rafter is moved to the direction of outside of the building, and thus the Jung-dori(中道里) is gradually moved to the column center. And, the change of the eaves with the Jusimpo-type structure was not a process for increasing the length of the eaves but a process for adopting the advantages of the Dapo-type structure by changing the arrangement of purlin. Fourth, the change from the Jusimpo-type structure to the Dapo-type structure could be understood as a process for moving the main point for handling a load from the Jusim-dori to the Oemok-dori.

• 복식
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• 제51권2호
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• pp.193-203
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• 2001

The hip-length jacket(유) worn by the Korean from the ancient times is tole prototype of the contemporary jacket. Hip-length jacket was transferred to Japan and worn by all the people beyond the class. From 12C, the King and the high class people wore the clothing influenced by Tang(唐) country but the common people continuously wore the hip-length jacket. Currently the hip-length jacket is worn by the merchant and is used as the clothing of the celebration. The hip-length jacket has not been much changed in terms of the form.

• 자원리싸이클링
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• 제28권6호
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• pp.54-63
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• 2019

본 연구에서는 폐유리를 골재로 재활용하고자 폐유리와 산화 그래핀을 사용한 시멘트 모르타르의 압축강도 및 길이 변화율 등을 검토하였다. 3일 및 7일 압축강도는 일반 모래 대체용 폐유리 사용량이 증가할수록 상승하였다. 특히, 폐유리 사용량이 10~50% 범위일 경우, 압축강도는 큰 폭으로 상승하는 경향을 나타내었다. 더불어 폐유리 50% 조건에서도 산화 그래핀의 첨가량이 증가됨에 따라 압축강도가 상승하였으며, 0.2%를 첨가하였을 때, 압축강도는 42.6 N/㎟ 이었다. 폐유리의 사용량이 증가됨에 따라 모르타르의 길이 변화율은 증가하였으나, 50% 이상에서는 길이변화율이 감소하는 경향도 나타내었다. 폐유리 사용량 50% 모르타르에서는 산화 그래핀 첨가량이 증가할수록 길이 변화율이 감소하는 경향을 나타내었으며, 이는 산화 그래핀의 시멘트 수화반응 촉진작용과 이온이동 억제효과로 추정되었다.

• 한국환경과학회지
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• 제22권7호
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• pp.895-903
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• 2013

This study analyzed on characteristics of the ground-water capture zone in coastal areas and mid-mountainous area according to pumping rate. For this study, it targeted Jejudo island where is the volcanic island. To analyze, MODFLOW model and MODPATH model, which are the ground-water flow analysis models, were used. As a result of research, the following conclusions could be obtained. As a result of analyzing influence of a change in pumping time upon length of capture zone, the length of capture zone in coastal area was indicated to be greater in the changing ratio compared to the length of capture zone in mid-mountainous area. Next, in the coastal area, the pumping rate and the capture-zone length are changing similarly. However, in mid-mountainous area, the length of capture zone was indicated to grow when the pumping rate comes to exceed 1,500m3/day. As a result of analyzing influence of a change in pumping time upon capture area, the tendency of a change in the area was indicated similarly in coastal areas and mid-mountainous area. Especially, it could be known that the larger pumping rate leads to the more definite increase in tendency to a change in capture area. Based on this study, it was allowed to be possibly used in the suitable pumping rate in coastal areas and mid-mountainous area of the volcano island in the future. A follow-up research is judged to necessarily analyze the influence of tubular-well group upon capture zone by additionally analyzing a change in capture zone targeting the concentrated tubular well.

• Restorative Dentistry and Endodontics
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• 제36권1호
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• pp.59-65
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• 2011

연구목적: 본 연구의 목적은 서로 다른 기하학적 형태를 가진 3가지 Ni-Ti 파일, 즉 K3, NRT, Profle을 사용하여 레진 블록으로 제작된 만곡 근관에서의 apical transportation 양상 및 working length 변화를 서로 비교하는 것이다. 연구 재료 및 방법: 실험 방법은 30개의 레진 블록을 Schneider technque을 사용하여 만곡도 측정 후 각 group당 임의로 10개씩 배분하였다. 이를 각 Ni-Ti 파일을 사용하여 crown down technique으로 근관 성형하였다. 이의 분석을 위해 double radiograph superimposition method (Backman CA 1992)를 사용하고, 분석의 정확성과 일관성을 위해 특별히 고안된 jig, digital X-ray 및 apical transportation의 측정 시 CAD/CAM software를 이용하였다. Apical transportation 양은 '근단공-0.5 mm'부위로부터 0, 1, 3, 5 mm에서 측정 하였으며, working length 변화는 근관 성형 전후의 working length 변화를 측정하였다. 또 통계 처리는 각 group의 apical transportation 양과 working length 변화를 Kruskal-Wallis One Way Analysis로 분석 후 다중 비교는 Mann-Whitney U-test를 사용하였다. 결과: 각 group간 working lengh 변화 및 0, 1, 3 mm 부위에서의 apical transportation 측정 값 사이에는 유의할만한 차이가 관찰되지 않았으나(p = 0.924), 5 mm 부위에서는 K3와 Profile사이에 유의할 만한 차이가 있었다(p = 0.027). 결론: 서로 다른 기하학적인 형태를 가진 3가지 Ni-Ti 파일의 apical transportation 및 working length 변화 정도 평가시, 본 연구의 범위 내에서는 3가지 파일 모두 유의할 만한 차이를 보이지 않은 가운데 본래의 근관 형태를 잘 유지한다고 할 수 있다.

• Bulletin of the Korean Chemical Society
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• 제33권11호
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• pp.3711-3718
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• 2012

Here, we report a chain-length dependent morphology and pore structure tailing of mesoporous silica templated from organogels, which is formed by primary alkylamine and ethylene glycol at room temperature. As the chain length of alkylamine changes from 12 to 18, the resulted materials exhibit a morphology change from layers to spheres and platelets, respectively. SEM and TEM observation revealed that these shapes appear to be inherited from their parent organogels. Further pore structure characterization by nitrogen sorption analysis demonstrates that all the resulted silicas exhibit typical IV isotherms indicative of uniform mesopores, and their pore sizes are dependent on the chain length of alkylamine used.

• 한국철도학회논문집
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• 제7권3호
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• pp.200-207
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• 2004

Theoretical study has been conducted to clarify pressure characteristics of KTX (Korea Train eXpress) in tunnel. The severe pressure change in tunnel may give rise to the ear-discomfort for passenger and fatigue for car body. Critical tunnel lengths which are induced by x-t diagram analysis can be applied to the experimental results measured by using the running test with atmospheric pressure sensors and portable data acquisition system in previous study. In this study, the tunnels from 200m to 4000m in length have been chosen for the investigation of tunnel length effects. We found that there are similar patterns of external pressure change for each critical tunnel length. The critical tunnel lengths are governed by train speed, train length and sonic velocity. And, the patterns of pressure wave in tunnel are classified into eight groups.