대청도 미아동, 농여, 지두리의 해안 지형에 대한 연구-암석 차이에 의한 차별침식을 중심으로-

신원정 ( Shin Won Jeong ),김종연 ( Kim Jong Yeon ) 한국사진지리학회 2018 한국사진지리학회지 Vol.28 No.3

We surveyed various coastal landforms that appear in the Miadong, Nongyeo and Jiduri coasts of Daecheong Island. We measured the rebound strength of the rock in this area. The outline of the shoreline of the Jiduri coast can be roughly outlined by the geological structure and the characteristics of the rock. The overall shape of the slope and the distribution of the seastacks are due to differential erosion of different lithology On the east side of the Miadong coast, the slope of the coastal hills and the slope of the strata are similar. On the western side of the Miadong coast, sea-stacks are formed and they are formed by differential erosion. Accumulation of iron and quartz fractions is observed along the cracks in the rocks. The type of accumulation of iron is various by the type of rock. In the case of mudstone, iron-enriched layer is found along the weak part such as the structural line, whereas in the case of sandstone, a thick iron-enriched layer appears along the stratum, especially at the surface of fossilized ripple marks. Particularly, at the boundary between the two rocks, a thick iron-enriched layer close to 10 cm appears. This iron-enriched layer is presumed to represent the weathering environment in the past, but the formation time of the iron-enriched layer is unclear at present and further research is required.

해남 북평면 퇴적층의 특성과 매몰 연대에 대한 연구

신원정 ( Won Jeong Shin ),양동윤 ( Dong Yoon Yang ),김종연 ( Jong Yeon Kim ) 한국지형학회 2016 한국지형학회지 Vol.23 No.3

The granulometric characteristics and chemical composition of the samples from the Bukpyeong myeon, Hainam gun, Jeollanam do were analyzed in this study. The samples were collected from the outcrop of coastal area where the height is about 30m. The burial age of the sediments also estimated by OSL(Optically Stimulated Luminescence) method. The origin and forming processes of the samples are not clear in this stage as limited number of evidences can be found. However it is suggested that the samples are not aeolian deposits originated from chinese loess by the chemical analysis. The mean diameter of samples were 5~6φ(silt) and are increased slightly downwards. The samples also well sorted. The samples have been heavily weathered by the chemical alteration index. The value of CIA increase downward rapidly at the upper part of outcrop, then stabilized afterwards. The vertical concentration changes ratio of cations varies; Si increases downwards while Fe, Ti, K and Mg decrease. There are fluctuation in concentration ratio of Na and Ca with increasing depth. The burial age of sample from upper part are estimated as 104.52±4.45ka BP, while that of lower part are 136.10±6.52ka BP, and they fall in to last part of MS6. The deposition rate for this site is found about 0.017mm/year. The uplift rate of the site is supposed to be 0.24~0.26m/ka with assumption of palaeo-sea level of +6m. However the origin of the sediment deposits should be explored and cleared.

영덕군 병곡면의 단층 노두 특성에 대한 연구

신원정 ( Won Jeong Shin ),김종연 ( Jong Yeon Kim ) 한국지형학회 2021 한국지형학회지 Vol.28 No.3

In the southeastern part of the Korean Peninsula, the Yangsan Fault, an active fault zone, has developed. Many earthquakes occur around these faults, and the possibility of earthquakes occurring along the branch faults is being discussed. On the other hand, the Yeongdeok Fault is reported in Yeongdeok-gun, which is the northern part of the Yangsan fault. In this study, goemorphic characteristics of a set faults found on the outcrop of the gentle slope of the coast of Byeonggok-myeon were analyzed and granulometric and geochemical characteristics of sediments and other materials, including fault gouges were analyzed. The outcrop of Byeonggok-myeon is the part of the fault core and can be divided into two parts. Theses fault are formed on the upper part of the Mesozoic bedrock and the tertiary sedimentary layer of red sand-supported clasts are covered in several sedimentary units. The faults were normal fault sets, and a number of vertical cracks were developed, and glossy surfaces were observed in the fault area. It appears that these faults have occurred after alluvial deposition had been formed. In the case of samples from fault gouges, there were differences in particle size and geochemical characteristics from the surrounding area.

해동명산도첩에 나타난 영동지역 지형 경관에 대한 연구

신원정 ( Shin Won Jeong ),김종연 ( Kim Jong Yeon ) 한국지형학회 2020 한국지형학회지 Vol.27 No.4

Silgyeong sansuhwa (Realistic landscape paintings) are drawn in Korea since 17th century. It has characteristics of more realistic description of landscape than painting from previous periods. Kim Hong Do’s ‘Haedong Myeongsan docheop (The album of paintings of famous mountains in Korea)’ has been recognized as fine example of realistic description of geomorphic landscapes. Kim Hong Do and Kim Eung hwan did official travel to Gwandong and Geumgangsan area by order of King Jeongjo in 1788. As a result of that travel they draw about 100 piece of landscape painting. About 60 pieces of the paintings are still remaining. These are open to public by Korea National Museum in 1996. 14 pieces of painting, Daegwanryeong and Gangneung, Gyeongpo-dae, Hohae-jeong, Gahak-jeong, Cheonggan-jeong, Mun-am, Mangyang-jeong, Wolsong-jeong, Neungpa-dae, Naksan-sa, Mureung-gye, Gyejo-gul, and Hyeonjong-am, are analysed in this study. Coastal depositional landforms, like lagoon, sand beach and spit or barriers, erosional forms, like sea stack, sea cliff and sea cave, depicted in the paintings are analysed. In addition, structural landforms, colluvial landform and bedrock incision form by the running water in mountain area were analysed and weathered forms of granite and excursion to karst cave also discussed. It is found that sea arch in the printing destroyed since 1788, though exact position and reason is still unknown. There are strong need for discovery and identification of geomorphic landscape resources, for applied geomorphological studies and for prepare educational materials for non-face-to-face education. It also be emphasized that it can be used of the course work materials for future education using augmented reality and virtual reality technology.

예비 교원의 비대면 수업 역량 강화에 대한 소고

신원정(Won Jeong Shin),김종연(Jong Yeon Kim) 충북대학교 교육개발연구소 2021 한국교육논총 Vol.42 No.3

코로나 바이러스의 확산으로 학생들의 학교 등교가 정지되거나 제한되면서 학교의 교실수업은 비상 비대면 수업으로 급격히 전환되었다. 이에 따라 교원들의 비대면 수업 역량의 중요성이 크게 부각되었으며, 특히 예비교원과 교원들에게 원격교육의 기능과 기법을 교육할 필요성은 더욱 강조되고 있다. 이에 본 연구에서는 비대면 수업 역량 강화와 관련된 제반 사항들을 살펴보고, 비대면 수업 모형을 제시하였다. 비대면 수업의 준비와 진행 과정을 비대면 교육 내용의 선정, 비대면 교육 자료의 제작, 비대면 수업용 미디어 형성, 비대면 전달의 단계로 구분하고 각 단계에서 필요한 기술과 장비 등을 소개하였으며, 각 단계에서 필요한 기술적 측면, 수업 내용과 기술의 결합 측면, 기타 고려 사항 등을 제시하였다. 또한해당 모형을 적용하여 예비 교원들의 비대면 교육 역량을 강화할 수 있는 수업 콘텐츠 사례를 제시하였다. 마지막으로 비대면 수업 콘텐츠에서의 저작권 문제, 수업 질 격차 해소, 비대면 수업을 위한 예비 교원 양성 시스템 구축 등과 같이 예비 교원 양성의 관점에서 비대면 수업에 대한 시사점과 향후 과제를 제시하였다. The COVID-19 pandemic has led to dramatic changes in school education. Classes were suspended or students were restricted from attending school, and classroom instruction shifted toward distance learning. Accordingly, teachers’ teaching abilities related to non-face-to-face education have become very important. In particular, there is a growing need for education on various non-contact methods for prospective and present teachers. Therefore, this study introduced the preparation and progress of non-face-to-face classes. It has five stages: selection of educational content, production of educational materials, making of educational materials, media production for non-face-to-face classes, and non-face-to-face delivery. This study introduces the necessary technologies and equipment required for each stage. In addition, we provide a case class that can strengthen the capacity of non-face-to-face teaching of pre-teachers. In addition, we discuss topics such as bridging gaps in class quality, copyright issues, and preparing teacher training systems for non-face-to-face education.

영광군 백수읍 하사리 일대의 사질 퇴적층 특성과 매몰 연대에 대한 연구

신원정 ( Shin Won Jeong ),양동윤 ( Yang Dong Yoon ),김종연 ( Kim Jong Yeon ) 한국지형학회 2017 한국지형학회지 Vol.24 No.1

To investigate the characteristics of sand sediment topography in the Yeonggwang coastal area of Chonnam and to collect evidence of the past extreme events causing coastal flooding, three sites were surveyed among the sediments of Baeksoo-eup Hassari. In this study, the changes of particle characteristics, chemical composition, and the age of deposition of sediments were investigated. The sediments near Baeksoonam Elementary School at the elevation of 10m near the paleo-coastline are estimated to have been deposited at about 3,400 years ago and the grain size of the upper part of the sandy layer is in the range of 2.47-2.11φ. The burial age of the sediment layer at Sadeung junction(BSN-B) was about 100 years. Considering the distance from the current coastline, the sands forming the dune are estimated to have been moved or deposited from the nearby area or the other dune on the front side. The mean grain size is observed to be fining upward. Especially, the mean of the upper part is about 2.3φ, which is similar to other survey points. The averaged grain size of the lower part of the BSNC (Hasari-1 Gu) was 2.19φ and the upper part was 2.16φ. The sorting showed that the upper part was slightly poorer than the lower, and it was difficult to specify the change of the environment. The burial age of the lower layer, which contains shells, was about 300 years. Considering previous studies, this shell layer is presumed to have formed by coastal flooding, such as a storm surge.

우이도 해안사구의 지형특성과 형성과정

신원정 ( Shin Won Jeong ),김종욱 ( Kim Jong Wook ),김종연 ( Kim Jong Yeon ),최정헌 ( Choi Jeong-heon ) 한국지형학회 2017 한국지형학회지 Vol.24 No.2

Massive coastal sand dunes are distributed in Ui-island, Shinan-gun. The sand dunes in Ui-island is worth studying, in terms of preserving natural environment without anthropogenic impacts. In this study, we surveyed geomorphological processes of the sand dune based upon measuring of geometric properties, grain size analysis, and OSL(Optically Stimulated Luminescence) age dating. The sediments of the dune consist mainly of well sorted medium sand with about 250μm. Based on spatial distribution of sand dunes, we found that they are formed by northwest monsoon during winter, and sands are supplied from Seongchon area in northern UI-island. According to OSL age dating, the sand dunes were deposited from 0.07±0.01 ka to 0.17±0.04 ka. This result shows that the transformation of the dune due to the sand movement by wind was active during the last 100-200 years. The aerial photograph indicates that the dimension of the largest sand dune has decreased since 1945. Further research is needed to get more detailed information on geomorphic changes of sand dunes in UI-island.

영광 하사리 해안 퇴적층 내의 연안 범람 증거

신원정 ( Shin Won Jeong ),양동윤 ( Yang Dong Yoon ),김종연 ( Kim Jong Yeon ),최정헌 ( Choi Jeong-heon ) 한국지형학회 2017 한국지형학회지 Vol.24 No.3

Sand deposit with shell units is exposed in Hasa-ri, Yeonggwang-gun, Jeonnam province. We investigated the characteristics of sand sediment topography in the Yeonggwang coastal area to collect evidence of the paleo-environmental change. We performed analysis on particle characteristics, chemical composition, and the age of deposition of sediments. The deposit comprise moderately well sorted medium and fine sand (1.00~2.19φ). Various sedimentary structures can be observed. Geochemical characteristics change by depth and the degree of variation with depth is small. The results obtained from OSL dating show that sand layers below shell units are deposited 0.32-0.43 ka. As the elevation of the shell unit far mean high water levels or highest high water level, the extensive shell layers could only have been deposited during storm surge conditions. Aeolian processes are discounted due to the size of clasts and the location at which they occur. Results of age dating of the surrounding deposits indicate shell deposits formed after around 300 years age. There is a distinct difference between sedimentary layers including dark brown-black layer. The sedimentary characters such as particle size and geochemistry show difference with depth. It is presumed that depositional environmental in Hasa-ri has changed several times before. This study is expected to contribute to finding an evidence about occurrence of storm surges.

만성 발목 불안정성 요인에 대한 엉덩이 강화 운동의 효과

신원정(Shin, Won-Jeong),오두환(Oh, Doo-Hwan),장석암(Zhang, Seok-Am),이장규(Lee, Jang-Kyu) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.3

본 연구는 만성 발목 불안정성을 가진 엘리트 선수들을 대상으로 8주간의 엉덩이 강화 운동이 엉덩이의 근력 및 족압 분포도의 변화에 어떠한 영향을 미치는 지를 분석하기 위해 실시되었다. 발목에 최소 2회 이상의 발목 염좌를 진단 받은 만성 발목 불안정성의 대상자 19명을 대상으로 8주간의 엉덩이 강화 운동을 실시하였으며, 결과에서 엉덩이 강화 운동으로 엉덩이의 외전근력은 유의한 증가를 보였지만 족압의 분포도와 증가비율은 유의한 변화를 보이지 않았다. 이 결과는 운동 후, 환측과 건측의 근력과 족압분포의 차이가 나타나지 않아 환측의 근력과 족압분포가 건측의 수준만큼 증가된 것으로 생각되며 이는 8주간의 엉덩이 강화 운동이 발목의 불안정의 개선에 일정정도 효과가 있는 것으로 사료된다. 이러한 결과를 토대로 만성 발목 불안정성을 가진 대상자들의 회복과 재발방지를 위한 재활운동 프로그램의 구성요인으로서 엉덩이 외전근력 강화와 족압 분포도에 대한 부분을 중요하게 반영하는 것이 효과적일 것으로 사료된다. This study examined the effects of 8-weeks hip muscle training on the hip joint abductor muscle isokinetic strength and foot pressure distribution in elite players with chronic ankle instability (N=19). A total of 19 subjects had chronic ankle instability from at least 2 ankle sprains, and were given 8-weeks hip muscle training exercise. The hip muscle strength of the elite players with chronic ankle instability increased significantly, but the foot pressure distribution and ratio of the foot pressure distribution of the elite players with chronic ankle instability did not reach statistical significance and the ratio of the foot pressure distribution showed a similar trend. These results suggest that the strength and foot pressure distribution of the affected-side might increase to that of the unaffected-side. The 8-weeks hip muscle training helped improve the chronic ankle instability of the elite players. Therefore, the hip muscle strength and foot pressure distribution are the primary factors of a rehabilitation program on ankle sprains.

대청도 옥죽동·대진동 사구의 물리·화학적 특성 및 퇴적시기 고찰

신원정 ( Shin Won Jeong ),김종욱 ( Kim Jong Wook ),김종연 ( Kim Jong Yeon ) 한국지형학회 2018 한국지형학회지 Vol.25 No.2

The purpose of this study was to investigate the physicochemical characteristics and formation age of sand dunes in the Okjukdong and Dajindong, Daecheong Island. As a result, most of the sand deposited in Okjukdong were composed of medium sized sand with moderately well sorted. The SiO2 and Al2O3 accounted for a very high proportion of these deposits. There were some differences in characteristics between the sands in the dune and beach, whereas similar characteristics were observed among the materials (OJ-B, OJ-C and OJ-D) in the dune. In case of Dajindong, heterogeneous geochemical characteristics were found in the lower point. It was estimated that this was due to the influence of Daejin-dong black beach. Age dating results showed that uncovered dunes in Okjukdong were deposited 0.44±0.02 ~ 0.50±0.02 ka, and sand deposits in Dajindong were formed 0.16±0.01 ~ 0.18±0.01 ka. In both Okjukdong and Dajindong, sand deposits estimated to be formed 70 years ago, therefore it can be estimated that sand movement was active throughout the area from about hundred years ago. In this study area, the growth of sand dunes has been active in recent several decades or hundred years. It seems that there were different regions where deposits predominated over time. The source of dune sand was also different from time to time. Since the windbreak forest was established, the natural growth of sand dunes was limited, and sand nourishment was carried out by period. Therefore, in order to protect and continuously utilize coastal sand dunes in Daecheong Island, it is necessary to prepare conservation plan.