제한된 연산량을 갖는 Dijkstra 탐색 기반의 스피어 디코딩

윤혜연(Hye-Yeon Yoon),김태환(Tae-Hwan Kim) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6

GIS 기반 우도비를 활용한 오름의 형태별 공간분포 특성 연구 -제주도 중산간지역을 대상으로-

윤혜연 ( Hye-yeon Yoon ),장동호 ( Dong-ho Jang ) 한국사진지리학회 2020 한국사진지리학회지 Vol.30 No.3

본 연구는 제주도 중산간지역 오름의 형태별(말굽형, 원추형, 원형, 복합형) 공간분포 특성을 GIS 기반 우도비(Likelihood)를 통해 분석하였다. 분석 결과, 모든 오름의 형태는 고도(DEM)와 경사도, 토양 배수도, 임상도, 토지피복도, 지형 습윤지수도(TWI) 등 모든 GIS 주제도에서 높은 상관관계가 나타났다. 종합해보면, 말굽형, 원추형, 원형, 복합형 오름은 각각 해발고도 350∼400m(18.6%), 250∼300m(42.6%), 300∼350m(28.4%), 450∼500m(23.4%) 등에 분포한다. 또한, 경사는 모두 20∼30° 구간에서 각각 50.8%, 43.5%, 48.9%, 43.1%가 분포한다. 토양배수는 모두 양호로, 각각 68.4%, 84.4%, 83.3%, 51.3%가 속하는 것으로 나타났다. 임상의 경우, 말굽형과 원추형 오름은 침엽수 인공림에 각각 30.0%, 45.2%, 원형과 복합형 오름은 활엽수림에 각각 26.9%, 31.1%가 분포하고 있었다. 또한 토지피복은 모두 산림지역에서 각각 85.8%, 78.2%, 72.7%, 72.9%가 분포하고, TWI는 모두 0.4∼5.9 구간에 각각 88.1%, 91.1%, 80.0%, 82.3%가 분포한다. 도출된 우도비 결과는 향후 GIS 공간통합 모델을 활용한 오름의 형태별 공간분포 특성 분석을 위한 기초 자료로 활용될 수 있을 것이다. This study analyzed the spatial distribution characteristics in the types of Oreum(Horse-shoses Type, Conical Shape, Ring Shape, Complex Type), located at the mid-mountain area of Jeju Island by using GIS-based likelihood ratio. The result of the analysis, high correlation was found in all thematic maps such as DEM(Digital Elevation Model), slope, soil drainage, forest type, land cover, and TWI(Topographic Wetness Index). Based on frequency ratio result, most of the Oreum of Horse-shoses Type, Conical Shape, Ring Shape, Complex Type are distributed in elevation of 350~400m(18.6%), 250~300m(42.6%), 300~350m(28.4%), 450~500m(23.4%). In addition, the slope distribution was contained for each type of 50.8%, 43.5%, 48.9%, and 43.1% at the angle of 20~30°. Furthermore, the soil drainage, highest frequency was found at well drained class and counted at 68.4%, 84.4%, 83.3%, 51.3% respectively. In terms of forest type, Horse-shoses Type, Conical Shape Oreum highest ratio were found in coniferous plantation at 30.0%, 45.2%, and Ring Shape, Complex Type Oreum highest ratio 26.9%, 31.1% were found in Broad-leaved forest. Also, Moreover, the land-cover was distributed of forest areas at 85.8%, 78.2%, 72.7%, 72.9%, as well as section 0.4∼5.9 of TWI was shown at 88.1%, 91.1%, 80.0%, 82.3% respectively. The likelihood ratio results to be calculated and would be used as basic data for analyzing the spatial distribution characteristics in the types Oreum using a GIS spatial integration model.

도심공원에 서식하는 비둘기(Colunba livia)의 시기별 번식경과 비교(Ⅰ)(pp.1-7)

윤혜연(Hye-Yeon Yoon),김상진(Sang-Jin Kim),유정철(Jeong-Chil Yoo),이두표(Doo-Pyo Lee) 한국조류학회II 2005 한국조류학회지 Vol.12 No.1

제한된 연산량을 갖는 Dijkstra 탐색 기반의 스피어 디코딩

윤혜연(Hye-yeon Yoon),김태환(Tae-Hwan Kim) 대한전자공학회 2017 전자공학회논문지 Vol.54 No.7

본 논문은 MIMO 통신 시스템을 위한 Dijkstra 탐색 기반의 제한된 연산량을 갖는 스피어 디코딩 (sphere decoding; SD) 알고리즘을 제안하고 이에 대한 성능을 평가한다. Dijkstra 탐색 기반의 SD는 MIMO 심볼 검파 과정에서 저 복잡도로 준 최적의 에러율 성능을 달성하는 효율적인 tree 탐색 알고리즘이다. 하지만 Dijkstra 탐색 기반의 SD는 채널 환경에 따라 연산량이 가변적이고, 최악의 경우 전역 탐색의 경우에 해당하는 높은 연산량을 갖는 심각한 문제가 있다. 본 논문에서는 이러한 문제를 해결하기 위해서 연산량을 제한시킨 새로운 Dijkstra 탐색 기반의 SD 알고리즘을 제시한다. 제안된 알고리즘은 연산량이 제한되었음에도 여전히 준 최적의 에러율 성능을 달성함을 모의 실험을 통해 검증하였다. This paper presents a Dijkstra’s-search-based sphere decoding (SD) algorithm with limited complexity for the symbol detection in MIMO communication systems. The Dijkstra search-based SD is efficient to achieve a near-optimal error rate in the MIMO symbol detection, but has a critical problem in that its complexity is variable and can correspond to that of the exhaustive search in the worst case. The proposed algorithm limits the computations while achieving a near-optimal error rate. Simulation results show that the error rate is near optimal even with the limited complexity.

GIS 공간자료를 활용한 제주도 중산간지역 오름의 공간적 분포특성 연구

윤혜연(Hye-Yeon Yoon),장동호(Dong-Ho Jang) 대한지리학회 2019 대한지리학회 학술대회논문집 Vol.2019 No.11

우도비를 적용한 경상북도 산불 발화지의 공간분포 특성 연구

윤혜연 ( Hye-yeon Yoon ),장동호 ( Dong-ho Jang ) 한국지리학회 2021 한국지리학회지 Vol.10 No.1

본 연구는 우도비를 적용하여 산불 발화지의 공간분포 특성을 분석하였다. 우도비 분석결과, 토양 배수등급을 제외한 고도, 경사, 사면향, 지질, 토지피복, 임상, 지형 습윤지수, 유효토심, 평균기온, 평균최고기온 등에서 산불 발화지와의 높은 상관관계가 나타났다. 이를 바탕으로 경북 산불 발화지의 공간분포 특성을 도출한 결과, 산불 발화지는 대부분 고도 0~200m(48.4%), 경사 10~20°(42.3%), 사면향은 남사면(22.8%)에 산불 발화지가 다수 분포하는 것으로 확인되었다. 또한, 산불 발화지의 지질은 34.6%가 화강암류에 해당하며, 토지피복은 산림지역(88.4%)에 산불 발화지가 가장 많이 분포하고 있었다. 임상은 30.6%가 침활혼효림에, 지형 습윤지수는 2.3~5.5(58.5%) 구간에 산불 발화지가 다수 분포하는 것으로 나타났다. 또한, 산불 발화지는 유효토심 50~100cm(49.5%)과 평균기온 및 평균최고기온에서는 각각 11.9~12.6°C(24.0%), 24.8~25.5°C(30.1%)에 많이 분포하는 것으로 확인되었다. 본 연구에서 도출된 결과는 산불 관리정책 수립 및 실행을 위한 기초자료로 활용될 수 있을 것이다. This study analyzed the spatial distribution characteristics of forest fire ignition point by applying likelihood ratio. Analysis of the obtained results, a high correlation with the forest fire ignition point was found in elevation, slope, aspect, geologic, landcover, forest type, topographic wetness index, effective soil depth, average temperature, and average highest temperature, excluding soil drainage. Moreover, the result that driven in the spatial distribution characteristics of the Gyeongbuk forest fire ignition point, most of the point have distributed an elevation of 0~200 m (48.4%), a slope of 10~20° (42.3%), and the aspect is located at South direction (22.8%). In addition, 34.6% of the geologic area of the forest fire ignition point corresponds to granite, and the land-cover was mostly distributed in the forest area (88.4%). In the case of forest type, maximum 30.6% were found to be in the mixed forest of soft and hardwood, and the topographic wetness index was found to be in the range of 2.3~5.5 (58.5%). In addition, forest fire ignition points were found to be widely distributed at the section of 50~100 cm (49.5%) in the effective soil depth, 11.9~12.6°C (24.0%) and 24.8~25.5°C (30.1%) at the average temperature and average highest temperature respectively. The results derived from this study can be used as basic data for forest fire management policies and practices.

무인항공기를 활용한 금강 하도내의 퇴적지형 변화 특성 연구: 공주보 개방 전·후를 중심으로

윤혜연 ( Yoon Hye-yeon ),윤광성 ( Yun Kwang-sung ),장동호 ( Jang Dong-ho ) 한국지형학회 2021 한국지형학회지 Vol.28 No.4

In this study is aerial photos and UAV(Unmanned Aerial Vehicle) images were used to analyzed the characteristics of depositional landform changes in the Geum river channels before and after the opening gate of Gongju weir. Based on the depositional landform classification result, the main stream and the bare land occupied most of the area in all periods, and also found that the main stream, mid-channel island, and sand bar occupied a greater degree of area increase or decrease compared to other landforms in the classification items. As a result of analyzing the characteristics of depositional landform changes before and after the opening gate of Gongju weir, it is judged that the depositional landforms have changed due to the decreased water level of the Geum river after the opening of the weir, the summer rainy season and typhoons, river stabilization after the effluence of Daecheong dam, supply and deposition of river sediments and fixation of vegetation. The results derived from this study can be used as basic data for the study of river depositional landforms and the establishment of management and conservation plans for the landforms in river channels.

일회성 운동이 골격근의 UCP3 mRNA 발현에 미치는 영향

윤혜연 ( Hye Yeon Yoon ),천우광 ( Woo Kwang Cheon ),서혜정 ( Hea Jung Suh ),타무라토모히로 ( Tomohiro Tamura ),임기원 ( Ki Won Lim ) 한국운동영양학회 2006 Physical Activity and Nutrition (Phys Act Nutr) Vol.10 No.2

장기 저항성 운동 트레이닝이 체지방 개선과 기초대사와 골밀도에 미치는 영향

윤혜연 ( Hye Yeon Yoon ),임기원 ( Ki Won Lim ) 한국운동영양학회 2005 Physical Activity and Nutrition (Phys Act Nutr) Vol.9 No.1

The purpose of this study is to examine the effect of long-term resistance exercise training on body fat deposition and resting metabolic rate (RMR) and bone mineral density in young women. 74 subjects were divided into control (CON) and exercise (EX) groups. The subjects of CON group were allowed their usual lives, and the subjects of Ex group practice participated to resistance training program, corresponded to 70% of maximum muscular. three times a week for six months. Muscle mass, body fat, and bone mineral density (BMD) of all subjects were measured at 0, 3 and 6 month after resistance exercise program, and RMR were measured at 4 month. The body weight of the CON group decreased from 56.92±0.93 kg to 56.30±0.89 kg, and the EX group decreased from 56.23±1.26 kg to 55.95±1.14 kg after 6 month. The muscle mass of the CON group decreased by 1.11%, but the EX group increased by 0.23%. Body fat decreased from 16.90±0.53 kg to 16.63±0.46 kg in the CON group, but decreased from 15.92±0.71 kg to 15.23±0.70 kg in the EX group. The BMD was not increased by the resistance exercise for 6 month in this study. However. RMR was significantly increased by the resistance exercise at 4 month. In conclusion, it is suggested that the long term resistance exercise training would promote body composition by increasing muscle mass, and RMR.

지형요소를 활용한 전라도 논매기소리의 공간분포와 전파에 관한 연구: 아리시고나 류, 산아지 곡, 방게 류를 사례로

윤혜연 ( Yoon Hye-yeon ),장동호 ( Jang Dong-ho ) 한국지형학회 2021 한국지형학회지 Vol.28 No.2

In this study, the effect on the spatial distribution and diffusion of Arishigona, Sanaji and Banggae appearing in Jeolla-do was analyzed using geomorphic elements. Based on result, the AriShigona is distributed in the western plains of the Yeongsan River basin and around from the Noryeong mountain range to Mudeung mountain range, the Sanaji is mainly diffused in the middle and upper parts of the Seomjin River and the lower parts of the Mangyeong River, Dongjin River and the Boseong River basin, and the Bang-gae is found to be distributed in the Seomjin River and the upper part of the Yeongsan River basin. Although the cultural centers of these Rice-paddy Weeding Songs are different but they appear to have a similar distribution pattern in Jeolla-do. This is used as a diffusion path of cultural elements by crossing lineaments in various directions and serving bridge role at the same time. However, in the region where the lineaments do not intersect, the continuity of Rice-paddy Weeding Songs are relatively low, which are considered to be reflected in the spatial distribution and propagation of the sound due to the influence of the drain network rather than the lineament. The results of this study can provide basic data for spatial distribution of Rice-paddy Weeding Songs, and regionality and cultural division by diffusion characteristics.