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Intraspecific diversity of Monochamus saltuarius (Gebler) based on DNA barcode analysis
전준형,변봉규,조영복,우서연,김철학,임종옥,박두상 국립중앙과학관 2015 Journal of Asia-Pacific Biodiversity Vol.8 No.4
Monochamus saltuarius has a morphological polymorphism, but there is no standard phenotype to distinguish the differences in M. saltuarius species. To investigate molecular diversity of M. saltuarius, mitochondrial cytochrome c oxidase I 5’ sequence were analyzed against specimens collected from Chungbuk, Gyeonggi, and Gangwon province. The DNA barcode results showed that the specimens make two groups with a 1.68%–3.1% K2P distance, but cannot find a specific phenotype difference among the specimens.
Cooperative network와 MLP를 이용한 PSRI 특징추출 및 자동표적인식
전준형,김진호,최흥문 대한전자공학회 1996 전자공학회논문지-B Vol.b33 No.6
A PSRI (position, scale, and rotation invariant ) feature extraction and automatic target recognition system using a cooperative network and an MLP is proposed. We can extract position invarient features by obtaining the target center using the projection and the moment in preprocessing stage. The scale and rotation invariant features are extracted from the contour projection of the number of edge pixels on each of the concentric circles, which is input to the cooperative network. By extracting the representative PSRI features form the features and their differentiations using max-net and min-net, we can rdduce the number of input neurons of the MLP, and make the resulted automatic target recognition system less sensitive to input variances. Experiments are conduted on various complex images which are shifted, rotated, or scaled, and the results show that the proposed system is very efficient for PSRI feature extractions and automatic target recognitions.
네트워크 분석을 활용한 자연발생적 노후 주거지역의 상업 확산 연구 - 경리단길 사례를 대상으로
전준형,박진아 한국도시설계학회 2019 도시설계 : 한국도시설계학회지 Vol.20 No.4
최근 서울의 쇠퇴한 산업 지역과 노후 주거지역에서 상업화가 진행되고 있다. 이에 본 연구에서는 사업체 위치정보와 3차원 공간 분석을 통해 자연발생적 노후 주거지역에서 발생하는 상업화 과정을 추적하고 상업 확산에 영향을 미친 요인을 확인하였다. 연구의 결과는 첫째, 경리단길의 상업화는 2007년에는 경리단길 중간 지점의 근린상권에서 시작하여 2013년에는 간선도로변으로 확산이 진행된 것으로 나타났다. 둘째, 각 시기별 영향을 미친 요인은 차이를 보였다. 2007년의 확산 과정은 내부가로망의 연결성이 좋은 경사가 완만한 가로를 따라 진행되었다면 2013년의 확산 과정은 외부 연결성이 좋고 상업시설 간 차량이동이 용이한 가로를 따라서 확장된 것으로 나타났다. 이러한 결과는 주요 업종 형태에 따라 요구되는 가로 구조의 특성이 변화할 수 있다는 것을 보여준다. Recently, commercialization is underway in the deteriorated industrial and aging residential areas in Seoul. This study traces the commercialization process occurring in spontaneously aged residential area through business location information and three-dimensional spatial analysis, and identifies the factors influencing the spread of commerce. The results of this study are as follows: First, the commercialization of Gyungridan street began in the neighborhood business district of the middle of Gyungridan street in 2007 and spread to the main road in 2013. Second, over time, different factors influenced the commercialization of the site. While the process of diffusion in 2007 progressed along the street with a smooth slope and good inner connectivity, the diffusion process of 2013 was extended along the street with good external connectivity and easy vehicle movement between commercial facilities. This result implies that factors affecting commercial spread may change depending on the major industry type.
다중컴퓨터를 이용한 신경회로망 기반 실시간 자동 표적인식시스템의 병렬구현
전준형,김성완,김진호,최흥문 대한전자공학회 1996 전자공학회논문지-B Vol.b33 No.2
A neural network-based PSRI(position, scale, and rotation invariant) feature extraction and ATR (automatic target recognition) system are proposed and an efficient parallel implementatio of the proposed system using multicomputer is also presented. In the proposed system, the scale and rotationinvariant features are extracted from the contour projection of the number of edge pixels on each of the concentric circles, which is input t the cooperative network. We proposed how to decide the optimum depth and the width of the parallel pipeline system for real time applications by modeling the proposed system into a parallel pipeline implementation method using transputers is also proposed. The implementation results show that we can extract PSRI features less sensitive to input variations, and the speedup of the proposed ATR system is about 7.55 for the various rotated and scaled targets using 8-node transputer system.
전준형,오현우,윤찬석,변봉규,박정주,박형순,박두상 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.2
Rapid and accurate identification of pest species found on quarantine inspection is of great importance to prevent an economic loss of agricultural commodities. In this study, we testedMALDI-TOFmass spectrometry to discriminate the larvae of threemorphologically similar pest species, Carposina sasakii, Grapholita molesta and Grapholita dimorpha, which usually found in Korean fruit exported to Asia and western countries. Uniquemass spectra profile byMALDI-TOFMS covering awide molecularmass range of 2000–20,000 Dawere produced from twelve reference samples for three species. The Principal Component Analysis and the heat map profile showed similar pattern within same species regardless of body part of a larvae, however showed clear discrimination between different species. This identification method can discriminate species within 15 min with a relatively small sample sized 2 mm3. It also can provide a simple well documented protocol and can be widely applied to identify pests that essentially needed an urgent identification such as quarantine inspection or health related pest monitoring to reduce an economic loss or to control the spread of the disease