• Title/Summary/Keyword: 융기대

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Geomorphic Evolution of Fluvial Terraces at Yeongdong.Yeongseo Streams in Gangwon Province, Korea (강원도 영동.영서 하천의 하안단구 지형 발달 - 내린천, 연곡천, 골지천, 오십천을 사례로)

  • Yoon, Soon-Ock;Hwang, Sang-Ill;Lee, Gwang-Ryul
    • Journal of the Korean Geographical Society
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    • v.42 no.3 s.120
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    • pp.388-404
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    • 2007
  • This study interprets evolution of fluvial terraces along the four Yeongdong- and Yeongseo streams such as Naerin River, Yeongok River, Golji River and Osip River, in Gangwon Province based on the tectonics. The results from the analyses of the distribution pattern of fluvial terraces and incision rates of rivers show distinctively the evidence as the axis of uplift by Taebaek Mountains, especially on the 4th, 5th and 6th terraces in upper reach of Osip River among the four streams. The axis of uplift extends to the zone of $30\sim40km$ in width as well as the divide. The difference of uplift between upper and middle reaches of Naerin River and total reach of Golji River wasn't found from the height from riverbed by the active uplifting along all reaches, estimated to be set in inner area of uplift zone. Incision rate of period between formation age of 2nd terrace and 1st terrace is calculated $0.13\sim0.22m/ka$, and incision rate of period between formation age of 1st terrace and Present is diversely calculated $0.17\sim0.27m/ka$ by the climatic discrepancy between the two periods. The incision rate of Yeongdong streams whose mouths reach to the sea level eroded actively more than Yeongseo streams in the uplift zone. And Yeongdong streams between formation age of 1th terrace and present appears to much higher than that of Yeongseo streams, due to active down-cutting in oder to balance against the sea level.

Late Neogene and Quaternary Vertical Motions in the Otway Coast, Southeast Australia (II): Epeirogenic Uplift Driven by Lithospheric Flexural Deformation (호주 남동부 Otway 해안의 후기 신제3기 및 제4기 융기 운동(II): 암석권 휨 현상에 의한 대륙 지각의 융기)

  • Shin, Jaeryul
    • Journal of the Korean earth science society
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    • v.33 no.6
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    • pp.534-543
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    • 2012
  • The relationship between tectonic uplift and geophysical analysis of gravity anomalies and the in-situ stress fields in the Otway Ranges, SE Australia is addressed in this study to understand the nature and possible mechanism for the neotectonic movements. The uplift axis of the ranges is coincident with the regional Bouguer gravity highs whereas thick Tertiary sedimentary successions are highly correlated with the gravity lows along the basin rift geometry. This result suggests that the gravity highs are separated by the thick Tertiary sedimentary successions. Regional structural trends associated with faults and foldings of the deformed surfaces are consistent with the prevailing NW-SE $S_{Hmax}$ trend in this part of the continent. The anomalously positive correlation between topography and Bouguer gravity fields suggests possibly a lithospheric flexural deformation mode at a long wavelength (order of $10^2$ kms) in the region. It also suggests that the reactivation of pre-existing lithospheric structures driven by plate boundary forces plays a key role in this mode.

Observation on Neck Form Changes Related to Aging in Men(Part I) -Using the Sliding Gause Measurement Method- (성인남자 목부위의 연령별 형태변화에 관한 연구(제1보) -슬라이딩 게이지법에 의한 분석-)

  • 이영숙
    • Journal of the Korean Society of Clothing and Textiles
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    • v.18 no.2
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    • pp.252-262
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    • 1994
  • As a means to get a better understanding of the kind of form changes to which is subject the neck of the men, in its aging process, several measurement recordings on a vertical and horizontal sections were carried. Subjects were young, middle aged and elder men (15 in their twenties, 11 in their forties and again 11 in their sixties) 1) The analysis of the meansurement results led us to distinguish 3 types of subjects according to the position of the their Adam's apple with regard to the horizontal plane containing their 7th cervical vertebrae point : clearly above (Type I), next to(Type II), clearly below(Type III). We found that young men correspond to the Type I and II, middle aged men to the Type ll and 111 and elder men only to the Type III. 2) The comparison of the horizontal sectional surface contained in the planes corresponding to the 4 points, shows a larger sectional surface for elder men in the Adam's apple plane, accompanied by a change of position of the Adam's apple forwards. As for the front neck point plane, the body sectiolial surface is larger in depth in elder men, without much change in breadth. And for the acromion point plane, we observed also an increase in depth, but with a decrease in breadth corresponding partially to the atrophy of the thoraric cage in eldermen.

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Upheaveal Behaviour of Tunnel Bottom in the Weatherd Fracture Zone under Tunnel Excavation (터널 굴착 중 바닥부 연약대로 인한 터널 융기 거동 사례 분석)

  • Chang, Yongchai;Kim, Nagyoung;Jin, Kyudong;Son, Yongmin
    • Journal of the Korean GEO-environmental Society
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    • v.15 no.6
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    • pp.49-56
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    • 2014
  • The stability of tunnel construction depends entirely on the characteristics of the soil strength. If the soil strength is weak, collapse of tunnel occurs frequently under construction. In general, it copes with collapse by conducting half section excavation or reinforcement in advance under these conditions. Nevertheless, it can be collapsed under upper section excavation in the weathered fracture zone and it can be recovered through the application of reinforcement. As it has a bad influence on the upper section in case of upheaveal of tunnel bottom, it can be adversely affected on the overall stability of the tunnel. Thus, an in-depth review of reinforcement is needed in poor bottom ground. As the practices that has a bad affect on the stability of the tunnel due to upheaveal of tunnel bottom is increasing, research is needed for applicable standards for reinforcement. In this paper, it were investigated at actual field cases of upheaveal of bottom ground and characteristics of behavior and reinforcement measures were analyzed.

A Critical Review on Setting up the Concept, Timing and Mechanism of Tertiary Tilted Flexural Mode of the Korean Peninsula: A new hypothesis derived from plate tectonics ('신생대 제3기 경동성 요곡운동'의 개념, 시기, 기작에 관한 비판적 고찰: 판구조운동 기원의 새로운 가설)

  • Shin, Jaeryul;Hwang, Sangill
    • Journal of the Korean Geographical Society
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    • v.49 no.2
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    • pp.200-220
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    • 2014
  • This study reexamines the old concept and reviews prevalent statements on Cenozoic vertical motions of the peninsula that have been uncritically repeated in our academia. The contents of this paper are redefinition of the notion, tilted flexure or warping, and a suggestion for a new time set and properties of the deformation, followed by a new model on its influencing factors and processes. In conclusion, the Cenozoic vertical motion of the Korean peninsula can be reified further with an epeirogenic movement of uplift in the east side-subsidence in the west side of the peninsula since the Neogene (23 Ma). However, the regional boundary for areas of uplift and subsidence is not likely in the Korean peninsula but broader farther to East China and the southern part of Russia. It can be best understood that mantle convection produced by subducting activities in the Western Pacific Subduction Zone causes the uplift and subsidence of earth surface around NE Asia. In addition, faultings in the upper lithosphere induced by in-situ plate boundary stresses accelerate regional uplift in the peninsula since the Quaternary. Controversies that are still standing such as current uplift movements along the western coast of the peninsula during the late Quaternary could be precisely discussed with future research providing detailed information on it.

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Consumer Intention to Purchase Domestic/Foreign Brand Jeans;Beliefs, Attitude, and Individual Characteristics. (국내 및 외국 상표 청바지의 구매의도에 따른 평가기준에 대한 신념과 추구이미지 및 의복태도의 차이연구)

  • 고애란
    • Journal of the Korean Society of Clothing and Textiles
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    • v.18 no.2
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    • pp.263-272
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    • 1994
  • The purpose of this study was to identify factors that might distinguish those who have a high level of Intention to purchase each of domestic, foreign designer and national brand jeans from those who have a low intention in terms of evaluative criteria belief, ideal jeans image and clothing altitude. The sample consisted of 198 male and 197 female students from five universities in Seoul. The questionnnaire consisted of 50 seven-point semantic differential scales dealing with evaluative criteria and ideal jeans image, beliefs about and intention to purchase domestic, foreign designer and foreign national brand jeans and 25 Likert type clothing attitude scales. Based on a series of t-tests the results showed that color and design were the most influencing factor among the evaluative criteria belief, regardless of brand type, while durability, accessory, sewing were the least. Sexy image, brand consciousnees and fashion interest were the important factor that distinguish high intention to purchase group fro)m low intention to purchase group.

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Effect of Corrected Hydrostatic Pressure in Shallow-Water Flow over Large Slope (대경사를 지나는 천수 흐름에서 수정된 정수압의 효과)

  • Hwang, Seung-Yong
    • Journal of Korea Water Resources Association
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    • v.47 no.12
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    • pp.1177-1185
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    • 2014
  • This study suggests a new hydrostatic pressure distribution corrected for nonuniform flow over a channel of large slope. For analyzing shallow-water flows over large slope accurately, it is developed a finite-volume model incorporating the pressure distribution to the shallow water equations. Traveling speed of the hydraulic jump downstream a parabolic bump in the drain case is quite reduced by the weakened bottom gradient source term in the model with the pressure correction. In simulating the dam-break flow over a triangular sill, it is identified that the model with pressure correction could capture the water surface by the digital imaging measurements more than the model without that. Due to the pressure correction decreasing the reflected flows on and increasing overflows over the sill, there are good agreements in the experiment and the simulation with that. Therefore, this model is expected to be applied to such practical problems as flows in the spillway of dam or run-up on the beach.

A Study on Deep Geothermal Energy and Potential of Geothermal Power Generation in Mongolia (몽골의 심부 지열에너지 자원과 지열발전에 관한 연구)

  • Hahn, Jeong-Sang;Yoon, Yun-Sang;Kiem, Young-Seek;Hahn, Chan;Park, Yu-Chul;Mok, Jong-Gu
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.8 no.3
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    • pp.1-11
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    • 2012
  • Mongolia has three(3) geothermal zones and eight(8) hydrogeothermal systems/regions that are, fold-fault platform/uplift zone, concave-largest subsidence zone, and mixed intermediate-transitional zone. Average temperature, heat flow, and geothermal gradient of hot springs in Arhangai located to fold-fault platform/uplift zone are $55.8^{\circ}C$, 60~110 mW/m2 and $35{\sim}50^{\circ}C/km$ respectively and those of Khentii situated in same zone are $80.5^{\circ}C$, 40~50 mW/m2, and $35{\sim}50^{\circ}C/km$ separately. Temperature of hydrothermal water at depth of 3,000 m is expected to be about $173{\sim}213^{\circ}C$ based on average geothermal gradient of $35{\sim}50^{\circ}C/km$. Among eight systems, Arhangai and Khentii located in A type hydrothermal system, Khovsgol in B type, Mongol Altai plateau in C type, and Over Arhangai in D type are the most feasible areas to develop geothermal power generation by Enhanced Geothermal System (EGS). Potential electric power generation by EGS is estimated about 2,760 kW at Tsenher, 1,752 kW at Tsagaan Sum, 2,928 kW at Khujir, 2,190 kW at Baga Shargaljuut, and 7,125 kW at Shargaljuut.