• 농촌계획
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• 제24권4호
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• pp.81-88
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• 2018

With the increase of the number of riverfront development projects an objective and systematized survey and assessment tool is required to understand and identify the characteristics and potentials of river environment for human uses. The purpose of this study was to develop an assessment system for the investigation and evaluation of the water-friendly environment and to examine its effectiveness by applying the system to the selected study sites. Literature reviews, expert consultation, and preliminary survey were conducted to select highly relevant indexes to evaluate water-friendliness in rivers and, as a result, an assessment system of ten items in four areas was established. The assessment system were applied to 139 reaches of six rivers including Bykgye Cheon, Seom River, Gap Cheon, Yudeng Cheon, Naesung Cheon, and Kumho River. The scores and grade of water-friendliness were calculated per rivers and reaches, and their differences were prominent according to urban river, rural river, mountainous area and city area. Bykgye Cheon and Naesung Cheon got high scores in visual quality and Kumho River and Gap Cheon in community needs and potential uses. The scores of each section in the same river can be used as a basic data for the selection of appropriate sites for the development of hydrophilic space. In addition, it is expected that identifying the characteristics of each river help establish an appropriate management plan for the river.

• 석유와에너지
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• 통권307호
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• pp.16-19
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• 2018

• 한국지형학회지
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• 제24권2호
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• pp.15-25
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• 2017

Subi basin is located at the crestline of Taebaek mountains. This paper aims to elucidate the geomorphic development of Subi basin through the analysis of river terraces built in Wangpi-cheon and Banbyeon-cheon. Wangpi-cheon flows northeastward from Subi basin, and Banbyeon-cheon flows southward at the west of Subi basin. Absolute age of terrace is measured by means of OSL methodology, long profile of Wangpi-cheon is made up with 10m interval contour line, and the elevation above river bed of high terraces is measured at the end part of terrace. The results are as follow: Firstly, high river terraces of Subi basin, Wangpi-cheon and Banbyeon-cheon are formed about 40 kyr(MIS 3) being interstadial stage of last glacial period. Secondly, the elevation above river bed of high terraces of Wangpi-cheon and Banbyeon-cheon tends to increase toward upstream. It means that the uplift of Taebaek Mountains influences considerably the formation of their terraces. Thirdly, the elevation above river bed of high terraces at the reach from Seomchon to Suha-ri of Wangpi-cheon tends to decrease toward upstream. This section is captured from Banbyeon-cheon flowing in the opposite direction. River piracy has occurred from the time of formation of Suha-ri high terrace to the time of formation of Hantee wind gap. Finally, for fluvial system of Wangpi-cheon to establish dynamic equilibrium, topographic axis will move toward Banbyeon-cheon.

• 대한치과의사협회지
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• 제37권1호통권356호
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• pp.14-17
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• 1999

• 대한치과의사협회지
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• 제36권12호통권355호
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• pp.818-821
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• 1998

• 대한치과의사협회지
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• 제36권11호통권354호
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• pp.734-737
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• 1998

• 한국도로학회논문집
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• 제18권5호
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• pp.95-103
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• 2016

PURPOSES : Permitted left turn is a turning maneuver in which a vehicle turns left using a gap between oncoming vehicles, called gap acceptance, and it enables for more efficient traffic operation at intersections. In Korea, the permitted left turn has not been a common maneuver at signalized or un-signalized intersections. However, many experts and the Police Agency tried to apply this effective turning maneuver at intersections in Korea since 2010. Though the investigation of gap acceptance is significantly important in understanding a driver's behavior at intersections, there have not been many studies about this topic, specifically a study to develop probability models of gap acceptance behavior. METHODS : In this study, the probability model of gap acceptance behavior for a permitted left turn was developed based on observational field studies. To develop the model, seven variables were analyzed including gap, waiting time, traffic volume, conflict-flow vehicle type, left-turning vehicle type, the number of lane, and time. RESULTS : In the final model, gap and left-turning vehicle type were found to be significant influencing factors. CONCLUSIONS : Through this model development, it was concluded that as the gap size increased, the probability of gap acceptance was higher. Moreover, when a left-turning vehicle was a passenger car, the probability of gap acceptance was higher than compared to large size buses or freight cars.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 1996년도 춘계학술발표회 논문집
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• pp.92-94
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• 1996

• 한국지구과학회:학술대회논문집
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• 한국지구과학회 2003년도 추계학술발표회 및 정기총회
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• pp.151-152
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• 2003

• 노동경제논집
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• 제41권3호
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• pp.61-93
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• 2018

본 연구는 박사학위 소지자들을 대상으로 성별 임금격차와 그 원인에 대해 분석하였다. 국내 박사인력을 대상으로 하는 표본조사인 박사인력활동조사를 이용하여 박사학위 소지자들의 성별 임금격차 수준을 우선 식별하고, 임금격차에 대한 정확한 실태 파악을 위해 Oaxaca류의 임금격차 분해 모형을 이용하여 성별 임금격차를 두 집단의 인적특성 차이에 기인하는 임금차이와 임금방정식의 추정계수 차이로 인해 발생하는 임금차별로 분해하였다. 분석 결과 임금격차 중 임금분해 모형으로 설명이 불가능한 임금방정식의 구조적 차이로 인한 임금차별의 비중이 약 38~43% 수준으로 나타났으며, 이는 박사학위 소지자들의 성별 임금격차에도 노동시장에서의 차별에 관한 문제의 중요성이 크다는 것을 암시한다.