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새로운 색종이 모자이크 모양 결정과 입체감 생성 알고리즘에 관한 연구
서상현,강대욱,박영섭,윤경현,Seo, SangHyun,Kang, DaeWook,Park, YoungSub,Yoon, Kyunghyun 한국컴퓨터그래픽스학회 2001 컴퓨터그래픽스학회논문지 Vol.7 No.2
This paper proposes a colored paper mosaic rendering technique based on image segmentation that can automatically generate torn and tagged colored paper mosaic effect. and 3D effect that come about in human-made mosaic work can be represented by generating shadow using difference of paper thickness. Previous method did not produce satisfactory results due to the ineffectiveness of having to use pieces of the same size. The proposed two methods for determination of paper shape and location that are based on segmentation can subdivide image area by considering characteristics of image. The first method is to generate Voronoi polygon after subdividing the segmented image again using quad tree. And the second method is to apply the Voronoi diagram on each segmentation layer. Through these methods, the characteristic of the image is expressed in more detail than previous colored paper mosaic rendering method and these methods enable to produce image that is closer to human-made mosaic work.
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Web 트래픽 기반의 전용 회선 대여곡 결정에 관한 연구
서상현,최영수,안성진,정진욱,Seo, Sang-Hyeon,Choe, Yeong-Su,An, Seong-Jin,Jeong, Jin-Uk 한국정보처리학회 2000 정보처리논문지 Vol.7 No.s8
이 논문에서는 Web 사이트를 설계할 때 응답시간과 관련해서 고려되어야 할 요수 중[10,15,16], 인터넷 연결 회선의 대역폭 결정에 참조될 수 있는 자료를 제시한다. 이를 위해 다양한 환경에서 Web 세션 도착율에 따른 응답시간과 회선 이용율의 변화를 관찰하고, 이를 통해 특정 대역폭의 회선에 대해 Web 서비스가 한계 응답시간 내에 보장될 수 있는 Web 세션 도착율의 임계치를 구한다. [15,16]. 이 논문에서는 데이터 수집을 위해 실험 네트워크를 구성하고, 자체적으로 구현한 패킷 생성기를 이용하여 세션 도착율의 변화에 따른 Web 트래픽을 시뮬레이션한다. 응답시간은 패킷 생성기가 생성한 각각의 HTTP(Hyper-Text Transfer Protocol)요청 패킷이 전송되는 시점부터 HTTP응답 메시지가 도착하는 시점까지의 경과된 시간으로 구하고, 회선 이용율은 SNMP(Simple Network Management Protocol)를 이용해 자체 구현한 데이터 수집기로 구한다[3]. 이 실험의 결과는, Web 사이트를 설계할 때 네트워크 전문가가 아니더라도 인터넷 연결 회선의 대역폭 결정 문제를 해결하는데 쉽고 유용하게 참조될 수 있다.
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서상현,장시웅,Seo, Sang-hyun,Jang, Si-woong 한국정보통신학회 2015 한국정보통신학회논문지 Vol.19 No.11
In the existing studies providing a method which do exercise according to music speed, the method was used which a user changes playing musics. However, if the method which a user changes directly playing musics is used, flow of exercise can be discontinued during searching musics when anyone want to play a fast music. In this paper, we designed the module which measures the number of steps from a user of wearable smart shoes based on the Arduino, and implemented the module so that the number of steps can be measured correctly by sending data to smart phone based on Android. And it is possible to measure moving distance and pace speed by utilizing a GPS in order to get the more accurate momentum. Also, we can measure more accurate calorie consumption than existing products by measuring the mean value of the calorie consumption for moving distance and the calorie consumption for the number of steps, give motivation of exercise by applying an algorithm of changing music genre according to pace speed, and increase the exercise effect at the same time.
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서상현,박영섭,윤경현,Seo, Sang-Hyun,Park, Young-Sup,Yoon, Kyung-Hyun 한국정보과학회 2002 정보과학회논문지 : 시스템 및 이론 Vol.29 No.1
비사실적 렌더링 기법(NPR, Non Photorealistic Rendering)에 대한 관심이 증가하면서 여러 컴퓨터 그래픽스 연구자들에 의해서 펜화, 수채화 , 인상파 기법 등 예술적 기법들을 표현하기 위한 연구가 진행되어 오고 있다. 비사실적 렌더링 기법에서 가장 초점을 두고있는 것은 사람이 직접 그리거나 조작 한 듯한 표현을 만들어 낼 수 있으냐 하는 것이다. 본 논문은 교육이나 예술적인 표현을 위해 사용되고 있는 종이를 찢어 붙여 표현하는 모자이크 작품을 자도으로 생성해 주는 기법을 제시하였다. 이를 위해 종 이를 칼이나 가위같은 도구에 의해 잘려진 것이 아닌 자연스럽게 찢어진 종이 표현 기술, 종이의 질감 표 현 기술, 붙여지는 종이의 형태를 결정하기 위한 다각형 생성기법등을 제시한다. Recently as it is growing concern about NPR(Non-Photorealistic Rendering), Several computer graphics researchers are studying to simulate conventional artistic expressions such as pen-and-ink illustrations, watercolor and impressionism technique. In the NPR it is important thing that someone can produce a representation looked like work drawn or manipulated people directly. In this paper we propose that the technique could make the mosaic work automatically, tore and tagged a paper by hands used to educational and artistical representation, we suggest various methods to express a shape and texture of paper tore by hands without using cutters or scissors.
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서상현,Seo, Sang-Hyun 한국교육녹색환경연구원 2003 교육·녹색환경연구 Vol.3 No.2
This study purpose is extract on the architectural principles and architectural planning direction for Integrated Secondary School. The integrated secondary school has an expectation of the total education environment in which has some problem as regional, teaching, treatment, establishment equipment part because of the based relative establishments are abolished. The expectations are the education effective rising, the reduce of the responsibility of the teacher, a smooth teacher placing and saving the educating estimate. As the new education course propulsion is raising the school and students discretion and expanding the way of educating, being close to the course of studies, the integrated operation is earnestly needed and such as these versatile background the small school will keep on getting integrated. Investigate about the senses of the manager and teachers, so after these reserch I've concluded these things below about the integrated secondary school.
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서상현,강상재,박우철 ( Sang Hyun Seo,Sang Jae Kang,Woo Churl Park ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.6
This experiment was carried out to elucidate the biological activity and absorption characteristics of flavonoids in Rhizobium and Bradyrhizobium and to obtain basic information on host specific nodulation by flavonoids in rhizobium-legume symbiosis. The purpose of the present study was to explore the biological activity and the flavonoid absorption indicates that host-specificity is induced by flavonoids in symbiotic nitrogen fixation. Biological activity increased by daidzein and genistein treatment on B. japonicum KCTC 1539 whereas decreased by luteolin treatment but increased by luteolin treatment on R. meliloti whereas decreased by daidzein and genistein treatment. Daidzein and genistein are absorbed by B. japonicum, KCTC 1539 at higher rate than other flavonoids. Especially, luteolin was absorbed at a least rate. Luteolin are absorbed by R. meliloti KCTC 2353 at higher rate than other flavonoids. Especially, daidzein and genistein was absorbed at a least rate.
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서상현,Seo, Sang-Hyun 한국교육녹색환경연구원 2002 교육·녹색환경연구 Vol.2 No.2
The purpose of this study is to construct the database and to analyze the space and to suggest the possibility of application for architectural planning and design through the approach analysis for educational facilities with the use of the GIS. The properties of the space is to be expressed by optimized path from the analysis of the user and the traffic situation. Analyzed with other site analysis factors(situation, view, noise, configuration of the earth, etc.), the total site analysis is to be made and it is also to be a decision making support system.
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