• Asian Journal of Turfgrass Science
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• v.22 no.2
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• pp.161-170
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• 2008

Recently irregular dark-colored patches were found on the Kentucky teeing ground in a golf course in Gyunggi providence. Interestingly, blue-green algae from the leaf tissue sample containing black spot-stained symptoms were largely observed through microscopic study. In general, algae present on the upper soil surface or in the upper layer of root zone form dark brown layers of scum or crust, which invoked harmful effects to turf growth such as poor drainage, inhibition of new root development. In this observation, unlike the algae were sometime found in senescing leaves on contacted soil in July and August, the blue-green algae were detected within black spot-stained Kentucky bluegrass leaf tissues including leaf blade, ligule, auriclea as well as leaf sheath. The blue-green algae were also detected on the leaf and stem tissue adjacent to the symptomatic leaf tissues. Two species of blue-green algae, Phomidium and Oscillatoria, were greatly observed. Oscillatoria species was more commonly notified in all samples. In addition, the two species were found on a putting green showing yellow spot disease at another golf course in Gyunggi providence. The data from chemical control assay revealed that chemicals such as propiconazole, iprodione, and azoxystrobin decreased blue-green algae population and leaf spots, which finally resulted in enhanced leaf quality. All taken together, we strongly suggested that the disease-like phenomenon by blue-green algae might be very closely mediated with infection/translocation process in relation with turfgrass. It indicates that blue-green algae in turf management may play an adverse role as a secondary barrier as well as a pathogenic agent. This report may be helpful for superintendents to recognize and understand the fact that algae control should be provided more cautiously and seriously than we did previously in upcoming golf course management.

• Korean journal of applied entomology
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• v.54 no.2
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• pp.63-71
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• 2015

A taxonomic review of Korean Laccophilus Leach is presented. Five species are recognized, three of which [L. hyalinus (De Geer), L. lewisius Sharp and L. minutus ($Linn{\acute{e}}$)] previously recorded in Korea are incorrect identification of L. vagelineatus Zimmermann, L. lewisioides Brancucci and L. difficilis Sharp, respectively. Habitus and SEM photographs, key and diagnoses of the species are provided.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.645-648
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• 2006

최근 컴퓨터의 급속한 보급과 영상처리기술의 발달로 금석학 분야는 인문학의 범주를 뛰어넘어 문화 정보 공유의 중요한 위치로 자리매김하게 되었다. 본 연구는 국내에서 처음 시도 되는 것으로, 수천년 정신문화 산물의 정보자료인 탁본을 영상으로 입력하여 디지털 데이터로 전환하고, 이를 공간 영역에서 종합 분석함으로 탁본영상 고유의 특성을 파악하고자 하였다. 탁본 원영상은 흑백의 두 영역으로 분할되는 완벽한 이진영상이나, 탁본뜨기 수작업과정을 거치면서 관측영상에는 영역간 색도의 혼재가 발생하고 얼룩무늬와 문양이 전체 영상에 분포한다. 이와같은 영상으로부터 필요한 문자나 문양의 정보를 추출하기 위한 전단계로 영상에 관한 종합적인 분석 작업을 하였다. 분석 기법으로는 공간분석법을 사용하였다. 역사적으로 유명한 대표적인 탁본을 위시하여 40여개의 탁본영상 샘플을 무작위로 선택하였고, 공간분석을 통해 색도분포특성과 영역간 색도 중복 및 영역형성 양상과 특성을 찾아내었다.

• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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• 2001.11a
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• pp.216-217
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• 2001

인류문명과 같이 시작한 천연염색은 생산량의 한정 염색물의 견뢰도 불량, 염색시 얼룩생성의 용이 등의 문제점으로 인해 화학염료가 발명되면서 점차 쇠퇴되었다. 그러나 천연염료로 염색한 염색물은 합성염료로 염색한 염색물에 비하여 그 색상이 자여스럽고 우아하며, 염색재료 대부분 한약재인 것이 많아 약리 효과를 갖는것이 많고, 최근 대두되고 있는 공해문제 해소에도 많은 장점을 가지고 있어 이에 대한관심이 점차 높아지고 있다. 일반적으로 동물성 섬유(견, 모)는 단백질 섬유로서 매여제를 쓰지 않고도 염색이 잘되는 편이지만, 식물성 섬유인 면, 마 등은 섬유소이므로 색소의 흡착이 불량하여 염색보조제로 전처리 한 다음, 주매염제를 처리해야 좋은 결과를 얻을 수 있다ㅣ. 식물성 섬유의 일종인 인피섬유로 이루어진 한지의 천연염색 효과 향상을 위해 염색 보조제로 전처리 한 것과 무처리 한지의 염색특성을 구명하기 위해 본 실험을 실시하였다.

• Journal of Korea Association of Health Promotion
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• v.4 no.1
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• pp.68-74
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• 2006

For identification of four sibling species of the Anopheles hyrcanus complex found in Korea, the 5.8 rDNA-ITS2-28S rDNA region of each species was sequenced and the species-specific primers wee designed The amplified PCR products obtained from each species were analyzed by agarose gel electrophoresis. The result showed a single species- specific band, I.e. 559bp, 432bp, 322bp and 192bp for An. sinensis, An. sp., An. lesteri and An. pullus, respectively. In conclusion, the species-specific PCR primers designed from ITS2 variable regions functioned successfully and specifically, and can be applied as a useful tool for identifying species of the Anopheles hyrcanus complex found in Korea.

• Journal of the Korean Society for Precision Engineering
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• v.21 no.8
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• pp.83-88
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• 2004

The Classification of defected oil-seals using a vision system with the artificial neural network is presented. The artificial neural network fur classification consists of 27 input nodes, 10 hidden nodes, and one output node. The selection of the number of the input nodes is based on an observation that the difference among the defected, non-defected, and smeared oil-seals is greatly pronounced in the 26 step gray-scale level thresholding. The number of the hidden nodes is chosen as a result of a trade-off between accuracy and computing time. The back-propagation algorithm is used for teaching the network. The proposed network is capable of successfully classifying the defected from the smeared oil-seals which tend to be classified as the defected ones using the binary thresholding. It is envisaged that the proposed method improves the reliability and productivity of the automotive vision inspection system.

• Journal of Korea Multimedia Society
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• v.19 no.3
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• pp.626-632
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• 2016

In this paper, we propose the defect emphasis in TFT-LCD panel image. The defect emphasis image consist of S(Shape) map and B(Brightness) map. S map based on DoG(difference of gaussian) is made with the mura defect shape characteristic. And B map use defect intensity property that defect intensity is higher than background. The experiments were conducted to evaluate the performance of the proposed defect emphasis method. The results of experiments show the validity of the defect emphasis using the proposed method.

• The Transactions of the Korean Institute of Electrical Engineers D
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• v.55 no.12
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• pp.547-549
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• 2006

We have proposed a novel algorithm for detecting scan alluk on the surface of a TFT-LCD device that is generated by non-uniform exposure during fabrication. The scan alluk is known to have similar intensity values on paths that are determined by the shape of lens for light exposure. Based on the observation, the proposed algorithm inspects the uniformity on the paths using 1D projection image of 2D LCD image and 2D backprojection image of the 1D image. We have shown the usefullness of the proposed method by theoretical analysis and experimental results.

• Proceedings of the KIEE Conference
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• 2005.10b
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• pp.127-129
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• 2005

본 연구에서는 백라이트 유닛의 검사를 위한 머신비전 시스템을 구축한다. 시스템은 크게 하드웨어와 소프트웨어로 나눌 수 있고 하드웨어는 조명부, 영상획득부, 로봇 암 제어부로 분류된다. 조명부는 36W FPL램프로 구성되었고 조명부의 상판에 아크릴판을 거치대로 이용하여 백라이트 유닛을 거치한다. 로봇 암 제어부는 2축 로봇 암을 제어하여 로봇 암의 센서부착 지지대에 부착된 CCD 센서를 이동시킨다. 이와 동시에 영상획득부에서는 이미지를 획득하여 PC로 전송한다. 소프트웨어의 화상처리 검사 알고리즘은 일정 패턴이 있는 도광판에 대한 검사 알고리즘과 일정패턴이 없근 백라이트 유닛에 대한 검사 알고리즘으로 분리된다. 일정 패턴이 인쇄되어 있는 패널에 대한 검사 알고리즘은 모폴로지 연산을 이용하는 템플릿 체크방법과 블록 매칭 방법이 사용되었고 일정패턴이 없는 유닛에 대한 검사는 개선된 Otsu 방법을 이용하여 얼룩이나 흐릿한 결함에 대한 결함을 검출하였다. 실험결과 불균일한 결함과 밝기가 일정하지 않은 결함일지라고 90% 이상의 검출율로 뛰어난 성능을 입증하였다.

• Korean Journal of Ichthyology
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• v.22 no.1
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• pp.65-77
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• 2010

To use the precise scientific name of the genus Gymnogobius from Korea, a taxonomic review of the genus Gymnogobius was made based on specimens collected in streams and estuaries of Korea from 1982 to 2007. The genus Gymnogobius in Korea includes 7 species: Gymnogobius breunigii (Steindachner), G. heptacanthus (Hilgendorf), G. macrognathos (Bleeker), G. mororanus (Jordan and Snyder), G. opperiens Stevenson, G. petschiliensis (Rendahl), G. urotaenia (Higendorf). A key to species of the genus Gymnogobius from Korea is provided, with description of their morphological characteristics and their distribution.