• Title, Summary, Keyword: 나비상

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Low-power Radix-4 FFT Structure for OFDM using Distributed Arithmetic (Distributed Arithmetic을 사용한 OFDM용 저전력 Radix-4 FFT 구조)

  • Jang Young-Beom;Lee Won-Sang;Kim Do-Han;Kim Bee-Chul;Hur Eun-Sung
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.43 no.1
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    • pp.101-108
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    • 2006
  • In this paper, an efficient butterfly structure for Radix-4 FFT algorithm using DA(Distributed Arithmetic) is proposed. It is shown that DA can be efficiently used in twiddle factor calculation of the Radix-4 FFT algorithm. The Verilog-HDL coding results for the proposed DA butterfly structure show $61.02\%$ cell area reduction comparison with those of the conventional multiplier butterfly structure. furthermore, the 64-point Radix-4 pipeline structure using the proposed butterfly and delay commutators is compared with other conventional structures. Implementation coding results show $46.1\%$ cell area reduction. Due to its efficient processing scheme, the proposed FFT structure can be widely used in large size of FFT like OFDM Modem.

DNA barcode analysis for conservation of an endangered species, Aporia crataegi (Lepidoptera, Pieridae) in Korea (멸종위기종, 상제나비(나비목, 흰나비과)의 보전을 위한 DNA 바코드 특성 분석)

  • Park, Hae Chul;Han, Taeman;Kang, Tae Wha;Yi, Dae-Am;Kim, Sung-Soo;Lee, Young Bo
    • Journal of Sericultural and Entomological Science
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    • v.51 no.2
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    • pp.201-206
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    • 2013
  • Aporia crataegi, an Korean endangered species, was first analyzed for DNA barcode sequences based on 28-year-old dried specimens and compared barcode characters with 36 individuals of ten geographical populations of Eurasia. They were revealed to consist of five different haplotypes. Among them, haplotype I was mostly extensive and high frequency with 75%. The south Korean individuals were confirmed to be belonging to haplotype I and have no genetic isolation on COI gene. By these results, we consider that selection of the identical haplotype from other geographical populations may be a requirement prior to performing for conservation and restoration of the Korean population. We also propose to analyse the additional genetic markers in order to understand a more accurate genetic structures between haplotypes of this species.

Development of an Interactive Video Installation Based on Zhuangzi's Butterfly Dream (장자 나비의 꿈을 소재로 한 인터렉티브 비디오 구현)

  • Kim, Tae-Hee
    • Journal of Korea Game Society
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    • v.11 no.2
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    • pp.29-37
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    • 2011
  • As a field in Digital Arts, interactive video introduced the mirror metaphor to the foundation of media, given its characteristic as a medium that extracts an audience image in a particular perspective. The interactive video work introduced in this paper addresses conceptual topics in the extension of Zhuangzi's Butterfly Dream and illustrates the technological approaches that employ an intensity-based computer vision processing in order to obtain the silhouette of audience for multiple graphical butterflies to draw an audience image. Users generate narratives in the interaction with the projected image. Sound is used in order for the system to provide augmented perception in the space and to add more rooms for narratives. The computer vision and the graphics methods introduced in this paper are suggested as tools for interactive video.

Eleven Species, Including Three Unrecorded Species, Belonging to Coleophoridae (Lepidoptera) Collected from Baengnyeong and Yeonpyeong Islands, Korea (백령도와 연평도에서 채집된 한국산 통나방과 (나비목)의 3 미기록종)

  • Kim, Minyoung;Lee, Bong-Woo;Lee, Heung-Sik;Park, Kyu-Tek
    • Korean journal of applied entomology
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    • v.52 no.4
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    • pp.321-326
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    • 2013
  • Eleven Coleophora species were found in a faunistic survey for the family Coleophoridae (Lepidoptera: Gelechioidea) in Baengnyeong and Yeonpyeong Islands, located near the Northern Limit Line in the West Sea. Among them, three species Coleophora adjunctella Hodgkinson, C. chenopodii Oku, and C. kurokoi Oku have been recorded for the first time in Korea. For the newly recorded species, taxonomic remarks and illustrations of the adults and female genitalia have been provided.

Habitat Restoration Initiative for Endangered Species Parnassius bremeri (Lepidoptera: Papilionidae) in Korea (멸종위기종 붉은점모시나비의 서식지 복원구상)

  • Kim, Do-Sung;Park, Seong-Joon;Shin, Young-Kyu;Park, Doo-Sang
    • Journal of the Korean Institute of Landscape Architecture
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    • v.39 no.6
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    • pp.98-109
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    • 2011
  • Habitat restoration initiative is an important factor for the on-site preservation of butterflies. A new habitat necessitates the investigation of the ecology of the butterfly, the landscape of the habitat, the work process, and a cost analysis. In this study, these factors were analyzed through1) re-consideration of the secured results from three years of field work, and 2) a habitat area estimation conducted according to the presence or absence of larvae and adults via a Parnassius bremeri Bremer survey. The investigation of the natural habitat, done for both larvae and adult butterflies found in South Korea, suggested that multiple patches with a minimum size exceeding $300m^2$ and with an average size of about $1,600m^2$were required for survival of this butterfly. Therefore, more than five patches should be considered for butterfly habitat and patches should have similarity to the present habitat environment with transplantation plans for diet plants and honeydew plants. In addition, to activate the migration of the butterfly, cutting down trees that are obstacles to migration, minimizing the distance between patches and the addition of a stepping patch are also required. A patch connectivity analysis showed that patches should be located within 300m of neighboring patches, as the migration of the butterfly will fail if it is more than 600m. Additionally, more than $10,000m^2$ for a single patch or a patch network composed more than five patches over $1,600m^2$ in size were recommended, with a total patch size of $8,000m^2$. Additionally, neighboring multiple patch networks are more desirable than a single habitat in the event a cyclic habitat pattern arises. In this study, we suggest a habitat restoration and optimal prerequisites for a butterfly habitat. It is expected that this research will lead to the creation of a good model for the restoration of butterfly species.

Butterfly Community Monitoring on Wolchulsan National Park in Korea (월출산국립공원 나비군집 모니터링)

  • Kim, Do-Sung;Park, Doo-Sang;Oh, Hae-Seon;Kim, Dong-Hyuk;Jeong, Jong-Chul
    • Korean Journal of Environment and Ecology
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    • v.27 no.2
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    • pp.196-203
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    • 2013
  • Butterfly communities were monitored to investigate the emergence pattern with line transect method at Wolchulsan National Park through May to October in 2012. Totally 1,151 individuals belong to 49 species were monitored through the study period. Libythea celtis was a dominant species with showing 357 individuals(31%) followed by Pseudozizeeria maha 96 individuals(8.3%), Mycalesis gotama 75 individuals(6.5%) and Ninois dryas 72 individuals(6.2%) respectively. Among the monitoring periods, highest individuals and species(516 individuals belong to 30 species) were found at June and showed a high abundance near reservoir region. Highest diversity was shown at August with a Shannon index of 2.75 while lowest at October(Shanon index 1.78) and total diversity index was 1.71. Dominance values(Simpson index) showed highest at June with a value of 0.40 while lowest at September with a value of 0.07 and averaged 0.12. Kungol and Seongjeon compose a high similarity habitats with a similarity value of 0.52 and it was 0.17 at Kungol and Youngsan, lowest cases. Reservoir banks played a important role for habitats of specific species. It can be considered that they provide an open space of glass land for butterfly population, which was deficient at mountain area.

Investigation of 3D Moving Picture Production Technique Using 2D Plat Image (2차원 평면 이미지를 이용한 3차원 동영상 제작 기법의 고찰)

  • Kim, Jong-Seong;Suh, Young-Sang;Song, Seung-Heon;Kim, Eung-Kon
    • Proceedings of the Korea Contents Association Conference
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    • pp.840-844
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    • 2006
  • 2차원 이미지는 오래전부터 발전되어온 훌륭한 표현 방법 중 한가지 이다. 하지만 단순한 2차원 이미지만을 가지고 보정과 편집을 통해 다양한 효과를 표현하는데 있어 여러 가지 한계가 있다. 본 논문에서는 2차원의 평면 이미지인 나비와 춘란의 이미지를 사용하여 나비의 날개짓과 춘란의 생장을 표현함으로써 단순한 2차원 평면 이미지를 사용하여 3차원 공간상에서 움직임과 동적인 느낌을 강조한 3차원 영상 제작기법을 구현하고자 한다. 이러한 영상제작기법은 동적인 효과를 가진 고품질의 영상을 쉽게 제작할 수 있기 때문에 개인 뿐만 아니라 전문 방송과 영상 매체에 효율적으로 적용할 수 있다는 장점을 가지고 있다.

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안전보건명인 인터뷰 - 근로자의 건강과 안전은 기업 경영의 원동력, (주)경동나비엔 송탄공장 최종숙 주임

  • Kim, Seong-Dae
    • The Safety technology
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    • no.188
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    • pp.22-23
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    • 2013
  • (주)경동나비엔은 1978년 3월에 설립된 우리나라의 대표적인 보일러 생산 업체로 1979년 송탄공장에서 국내 최초 콤팩트형 사각 기름보일러 '코로나 KDB-202'를 출시하면서 업계의 주목을 받기 시작했다. 또한 최근에는 북경, 상해, 미국 등으로 진출하며 명실 공히 글로벌 기업으로 비상하고 있다. 이 같은 화려한 회사소개를 차치하고서라도 (주)경동나비엔을 모르는 사람이 없을 것이다. (주)경동나비엔은 옛 사명인 '경동보일러'로 1990년대 초 중반 '아버님 댁에 보일러 놔드려야겠어요'라는 광고를 통해 대대적으로 브랜드를 알렸기 때문이다. 이후 2006년에는 경동나비엔으로 사명을 변경하고 온수기 난방, 냉방 공조, 홈네트워크 각방제어시스템으로 사업 영역을 확장하고, 콘덴싱 기술력으로 해외 1억 달러의 수출액을 달성하는 등 국내 보일러 업계의 선두를 유지하고 있다. 이러한 (주)경동나비엔은 사업장의 안전관리에 있어서도 남다른 두각을 드러내고 있다. 대규모 기계공장을 운영하고 있는 만큼 이에 대한 안전관리 기술과 노하우도 남다른 것이다. 이번호에서는 (주)경동나비엔의 안전보건을 책임지고 있는 최종숙 주임을 만나 구체적인 업무내용과 안전에 대한 소견을 들어본다.

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Simulation of Viscous Flow around a Circular Cylinder between Parallel Walls

  • Kwag, Seung-Hyun
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • pp.212-216
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    • 2002
  • 평행한 벽 내부의 흐르는 규제 속에 원형실린더를 놓고 운동장 해석을 수행하였다. 비압축성 Navier- Stokes 방정식을 풀었고 3차 풍상미분의 수치해법을 이용하였다. 채널 내부에서 실린더의 위치를 이동하면서 벽면의 효과 전단력, 와류의 현장을 규명하였다. 수치처리는 Marker & Cell 기법에 의한 유한차분법을 사용하였다. 본 연구를 통하여 실린더와 벽 경계 사이에서의 생성된 와가 박리 전단에 영향을 미치는 것을 알 수 있었다.

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지상전시 - 제17회 대한민국패키지디자인대전

  • (사)한국포장협회
    • The monthly packaging world
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    • pp.124-129
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    • 2009
  • 이번 대한민국패키지디자인대전에서는 일반부문 대상으로 전자부문에 출품한 디엔시의 팅크웨어 아이나비 K7이 선정되었다. 학생부문 대상에는 박성수 씨가 선정되었다. 금번 2008년 대한민국패키지디자인대전에서는 외관을 구성하는 형상, 모양 및 색채 등의 요소가 종합적으로 아름답게 구성되고 독창성이 있으며 판매를 촉진 할 수 있는 작품을 중심으로 평가가 이뤄졌으며 특히 상품 목적에 적합한 기능, 사용상의 편리성 및 유지 관리의 용이성 등을 충분히 갖추고 있는 작품을 높이 평가했다. 본 고에서는 제17회 대한민국패키지디자인대전 일반부문 수상작들을 살펴보도록 한다.

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