김포 수기마을 힐스테이트

이승연,Lee, Seung-youn 대한건축사협회 2008 建築士 Vol.2008 No.10

다중빔 방식의 FMCW 레이더 표적신호 시뮬레이터 개발

이승연,최덕선,정영헌,이석재,윤주홍,Lee, Seung-Youn,Choe, Tok-Son,Jung, Young-Hun,Lee, Seok-Jae,Yoon, Joo-Hong 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.3

To detect targets for autonomous navigation of unmanned ground vehicle, mounted sensors are required to work all-weather condition. In this point of view, the FMCW radar is quietly appropriate. In this paper, we present development results of target signal simulator for multi-beam type FMCW radar. A target signal simulator make pseudo target signals which simulates multiple moving targets. And we describe how to make hit information for each target in multi-beam type radar. The developed methods are utilized for target tracking device. Moreover it can be applied to similar target signal simulator.

다중센서-다중프레임 기반 표적분할기법

이승연,Lee, Seung-Youn 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.3

Adequate segmentation of target objects from the background plays an important role for the performance of automatic target recognition(ATR) system. This paper presents a new segmentation algorithm using fuzzy thresholding to extract a target. The proposed algorithm consists of two steps. In the first step, the region of interest(ROI) including the target can be automatically selected by the proposed robust method based on the frame difference of each image sensor. In the second step, fuzzy thresholding with a proposed membership function is performed within the only ROI selected in the first step. The proposed membership function is based on the similarity of intensity and the adjacency of target area on each image. Experimental results applied to real CCD/IR images show a good performance and the proposed algorithm is expected to enhance the performance of ATR system using multi-sensors.

복잡한 환경에서 다중표적추적을 위한 고속 트랙병합 기법

이승연,윤주홍,이석재,정영헌,최덕선,Lee, Seung-Youn,Yoon, Joo-Hong,Lee, Seok-Jae,Jung, Young-Hun,Choe, Tok-Son 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.4

In this paper, we proposed a method of fast track merging which is the foundation of track to track association technique. The existing method of track merging is performed throughout comparison between tracks to tracks. Therefore, it has heavy calculation time. In our research, we developed a method for fast clustering by using nearest neighbor measurement identification. The simulation results show that the proposed method is more faster than previous method about 3.3%. We expect that this method could be effectively used in multi-target tracking particularly in heavy clutter environment.

DCT 특징을 이용한 지표면 분류 기법

이승연,곽동민,성기열,Lee, Seung-Youn,Kwak, Dong-Min,Sung, Gi-Yeul 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.4

The ability to navigate autonomously in off-road terrain is the most critical technology needed for Unmanned Ground Vehicles(UGV). In this paper, we present a method for vision-based terrain cover classification using DCT features. To classify the terrain, we acquire image from a CCD sensor, then the image is divided into fixed size of blocks. And each block transformed into DCT image then extracts features which reflect frequency band characteristics. Neural network classifier is used to classify the features. The proposed method is validated and verified through many experiments and we compare it with wavelet feature based method. The results show that the proposed method is more efficiently classify the terrain-cover than wavelet feature based one.

탄약운반 자동화 시스템의 고장 검출 및 분류 기법

이승연(Seung-Youn Lee),강길순(Kil-Sun Kang),유준(Joon Lyou) 제어로봇시스템학회 2005 제어·로봇·시스템학회 논문지 Vol.11 No.10

엽수, 배지 종류가 자생산수국 녹지삽의 발근에 미치는 영향

이승연(Seung Youn Lee),윤나희(Na Hee Yoon),구진희(Jin Hee Gu),김귀순(Gui Soon Kim),이정철(Jung Chul Rhee),이택주(Taek Joo Lee),이정식(Jeong Sik Lee) 한국생물환경조절학회 2007 한국생물환경조절학회 학술발표논문집 Vol.16 No.2

요양병원 입지의 선호도에 관한 연구

이승연(Seung-Youn Lee) 한국보건복지학회 2013 보건과 복지 Vol.15 No.-

The paper aims at analyzing the differences in preference and satisfaction according to the types of location in geriatric hospitals. For the purpose, the employees working at 214 geriatric hospitals were surveyed from February 1 to April 5, 2013. Among 220 questionnaires, the 214 returned ones were statistically treated. The results are as follows; First, the location analysis results show that geriatric hospitals in the Jeolla Provinces had the greatest preference for ease to obtain medical supplies and equipments and easy access to medical technologies and office work support service. Their counterparts in Gyeongsang Provinces turned out to be satisfied with connections with specialized research institutions and government agencies and easy access to medical technologies and office work support service. Second, the analysis results according to the characteristics of hospitals indicate that special hospitals to treat alcoholism were satisfied with financial supports from the local and central government including all kinds of subsidies and financial loans. Third, the analysis results according to the number of beds reveal that hospitals with 151 beds or more preferred intimacy and closeness to specialized research institutions, schools, and agencies and were the most satisfied with the area of the lot and degree of tax reduction. Fourth, the analysis results of location conditions among geriatric hospital employees show that they considered the area of the lot (M=3.93) the most and connections with specialized research institutions and government agencies (M=3.03) the least in terms of preference. Their satisfaction level was the highest with local image (M=3.45)and the lowest with financial supports including all kinds of subsidies and financial loans (M=2.54). Finally, the study performed IPA on the Y axis of mean preference (3.56) and the X axis of mean satisfaction (3.08) for the 19 main location condition items of geriatric hospitals in the nation. 「Quadrant I」 of both high preference and satisfaction among geriatric hospital employees contained items on convenience with administrative service including permit and approval of hospital foundation, area of the lot, local image, and collaborative relationships with hospitals in neighboring areas. Their preference and satisfaction levels were particularly high with the area of the lot. On the other hand, 「Quadrant III」 of both low preference and satisfaction included items on ease to obtain medical supplies and equipments as access to the selling market, intimacy and closeness to specialized research institutions, schools, and easy access to medical technologies and office work support service. Those findings suggest that they should consider convenience with administrative service including permit and approval of hospital foundation, proper area of the lot, local image, and collaborative relationships with hospitals in surrounding areas as the most important factors of geriatric hospital foundation.

자생 관상용 Heloniopsis와 Thalictrum속 종자의 형태적 및 형태생리적 휴면

이승연(Seung Youn Lee),이용하(Yong Ha Rhie),정현환(Hyun Hwan Jung),김기선(Ki Sun Kim) 한국원예학회 2014 원예과학기술지 Vol.32 No.3

많은 백합과, 미나리아재비과 식물들의 종자들은 모식물체에서 미숙배를 가지고 탈리되는 것으로 보고되고 있다. 이러한 종자들은 형태적 또는 형태생리적 휴면을 가지고 있다. 따라서 본 연구는 몇 가지 자생 관상용 Helopniopsis, Thalictrum속 식물의 형태적 종자휴면 연구를 위한 기초자료를 제공하고자 수행하였다. 백합과의 처녀치마와 숙은처녀치마, 미나리아재비과의 금꿩의다리, 자주꿩의다리 및 연잎꿩의다리 종자의 배의 형태와 발아율을 조사하였다. 연구대상 다섯 종 모두 미숙배 종자였다. 백합과의 처녀치마와 숙은처녀치마는 미발달형 배를 가지고 있었다. 미나리아재비과의 꿩의다리 세 종은 모두 미발달형과 직선형의 중간형 태로 판단되었다. 연구된 다섯 종 모두 유근이 돌출하기 전에 배가 일정 크기까지 신장하였다. 백합과의 처녀치마와 숙은처녀치마는 30일 동안 각각 22.7%, 40.7% 정도가 발아한 반면, 미나리아재비과의 금꿩의다리, 자주꿩의다리 및 연잎꿩의다리는 각각 12.5%, 3.3% 및 0%가 발아하였다. 따라서 처녀치마와 숙은처녀치마의 종자는 각각 약 78%, 60% 정도가 형태생리적 휴면을 보였고, 금꿩의다리, 자주꿩의다리 및 연잎꿩의다리는 각각 약 87%, 96% 및 100%가 형태 생리적 휴면을 보였다. 한 종 내에서도 형태적 휴면과 형태 생리적 휴면을 동시에 가지고 있었다. 따라서 미숙배가 발아 지연의 원인으로 판단되었다. 이 결과들은 추후 한반도 자생식물의 형태학적 종자휴면을 연구하는데 유용한 자료가 될 것이다. This study was conducted to find basic information for the research of morphological dormancy in seeds of two genera (Heloniopsis and Thalictrum) native to Korea. Seeds of Heloniopsis koreana, Heloniopsis tubiflora, Thalictrum rochenbrunianum, Thalictrum uchiyamai, and Thalictrum coreanum were collected, and embryo morphology and seed germination were investigated. All seeds of five species had underdeveloped embryos which occupied about 10-20% of the full seed length at maturity. The seeds of H. koreana and H. tubiflora had rudimentary embryos. The seeds of T. rochenbrunianum, T. uchiyamai, and T. coreanum had intermediate type between rudimentary and linear embryo. The small embryos of all seeds of five species grew to a critical length before radicles emerge from the seeds. At 30 days after sowing, the seeds of H. koreana and H. tubiflora germinated to 22.7% and 40.7%, respectively. On the other hand, the seeds of T. rochenbrunianum, T. uchiyamai, and T. coreanum germinated to 12.5%, 3.3%, and 0%, respectively. If embryo growth and germination in seeds are completed in approximately 30 days, the seed are said to have morphological dormancy (MD). However, if the seeds require > 30 days for germination, they are considered to have morphophysiological dormancy (MPD). Thus, the seeds of H. koreana and H. tubiflora had about 78% and 60% MPD, respectively. On the other hand, the seeds of T. rochenbrunianum, T. uchiyamai, amd T. coreanum had about 87%, 96%, and 100% MPD, respectively. There was a different level of dormancy (MD and MPD) within the same seed population examined. Therefore, germination of the seeds was delayed due to the underdeveloped embryos. This result could contribute to determine morphological seed dormancy and germination mechanism in seeds of the Korean Peninsula.

자생산수국의 종자발아특성

이승연(Lee Seung Youn),이정식(Jeong Sik Lee) 한국원예학회 2007 한국원예학회 학술발표요지 Vol.2007 No.6