• 한국축산식품학회지
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• 제35권3호
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• pp.382-388
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• 2015

A duplex real-time polymerase chain reaction (PCR) based assay for the detection of porcine and horse meat in sausages was designed by using EvaGreen fluorescent dye. Primers were selected from mitochondrial 12S rRNA and 16S rRNA genes which are powerful regions for identification of horse and porcine meat. DNA from reference samples and industrial products was successfully extracted using the GIDAGEN® Multi-Fast DNA Isolation Kit. Genomes were identified based on their specific melting peaks (Mp) which are 82.5℃ and 78℃ for horse and porcine, respectively. The assay used in this study allowed the detection of as little as 0.0001% level of horse meat and 0.001% level of porcine meat in the experimental admixtures. These findings indicate that EvaGreen based duplex realtime PCR is a potentially sensitive, reliable, rapid and accurate assay for the detection of meat species adulterated with porcine and horse meats.

• 한국전자통신학회논문지
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• 제11권3호
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• pp.331-338
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• 2016

본 논문에서는 기존의 문제점인 얼굴 움직임이 있을 시 시선 식별이 어려운 점과 사용자에 따른 교정작업이 필요하다는 점을 해결하고자 새로운 시선 식별 시스템과 얼굴인식에 필요한 GRNN(: Generalized Regression Neural Network) 알고리즘을 제안한다. Kalman필터를 사용하여 현재 머리의 위치정보를 이용하여 미래위치를 추정하였고 얼굴의 진위 여부를 판단하기 위해서 얼굴의 특징요소를 구조적 정보와 비교적 처리시간이 빠른 수평, 수직 히스토그램 분석법을 이용하여 얼굴의 요소를 검출한다. 그리고 적외선 조명기를 구성하여 밝은 동공효과를 얻어 동공을 실시간으로 검출, 추적하였고 동공-글린트 벡터를 추출한다.

• 전기학회논문지
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• 제65권6호
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• pp.1060-1069
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• 2016

In this paper, we introduce the fingerprint recognition system based on Radial Basis Function Neural Network(RBFNN). Fingerprints are classified as four types(Whole, Arch, Right roof, Left roof). The preprocessing methods such as fast fourier transform, normalization, calculation of ridge's direction, filtering with gabor filter, binarization and rotation algorithm, are used in order to extract the features on fingerprint images and then those features are considered as the inputs of the network. RBFNN uses Fuzzy C-Means(FCM) clustering in the hidden layer and polynomial functions such as linear, quadratic, and modified quadratic are defined as connection weights of the network. Particle Swarm Optimization (PSO) algorithm optimizes a number of essential parameters needed to improve the accuracy of RBFNN. Those optimized parameters include the number of clusters and the fuzzification coefficient used in the FCM algorithm, and the orders of polynomial of networks. The performance evaluation of the proposed fingerprint recognition system is illustrated with the use of fingerprint data sets that are collected through Anguli program.

• 한국멀티미디어학회논문지
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• 제14권8호
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• pp.1029-1040
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• 2011

스마트카드 기반의 전자신분증은 오프라인과 온라인 신분확인을 위한 대표적인 개인 신분확인 수단으로, IC칩에 카드소유자의 신분확인 정보와 암호기법이나 전자인증서 관리를 위한 암호화 모듈을 포함하게 된다. 개인 식별정보에 대한 빠른 접근성과 신뢰성 및 보안성으로 인해 주요자산에 대한 접근통제를 위해 전자신분증을 도입하려는 공공기관이나 기업들이 증가하고 있다. 본 논문에서는 전자신분증을 이용한 접근통제에서 개인 신분확인을 위한 인증시스템의 구현방안에 대해 제안하고, 효과적인 인증시스템의 운영을 위한 기능적 요구사항들에 대해 논의한다. 이를 위해 본 논문에서는 Personal Identity Verification 시스템 모델을 대상으로 하여 연구하였다.

• 한국정보통신학회논문지
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• 제10권5호
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• pp.806-811
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• 2006

RFID 시스템에서 태그들이 동시에 응답을 하면 충돌이 발생하며, 이를 해결하는 기술이 충돌방지 알고리즘이다. 기존의 충돌방지 알고리즘 중에서 SFSA (Static Framed Slot ALOHA) 알고리즘은 구현이 간단한 장점이 있지만, 프레임의 크기가 고정되어 있기 때문에 태그 수가 가변적인 경우에는 시스템 성능이 저하되는 단점이 있다. 따라서 본 논문에서는 충돌이 발생한 슬롯의 수를 이용하여 매 프레임마다 최적의 프레임 크기를 결정하는 DFSA (Dynamic FSA) 알고리즘을 제안한다. 성능 분석의 결과, DFSA 알고리즘은 기존의 SFSA알고리즘에 비하여 빠른 태그 식별이 가능함을 알 수 있었다.

• 미생물학회지
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• 제35권1호
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• pp.61-64
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• 1999

토양으로부터 유기인계 살충제인 phosphamidon을 분해하는 세균들을 분리하고 Biolog system을 이용하여 동정하였다. 그람양성 세균들은 모두 Bacillus 속에 속하는 종들이었으며 그람음성 세균들은 토양에서 우점하지 않는 세균들이 많았다. 이들중 phosphamidon 함유배지에서 생장률이 높은 균주들을 선택하여 phophamidon 분해능을 조사한 결과 Capnocytophaga gingivalis 로 동정된 YD-17 균주가 가장 높은 생분해능을 나타내어 1000ppm의 phosphamidon 이 배양 21일 후 94%의 잔류량을 보였으며 이는 대조구에 비해 제거율이 52% 증가된 결과였다. 이 때 균주의 생장을 단백질량으로 측정하였는데 분해균주들이 고농도의 phosphamidon에 의해 저해되지 않고 지속적인 생장을 하여 phosphamidon을 탄소원으로 이용하는 생분해가 일어난 것을 확인할 수 있었다.

• 한국통신학회논문지
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• 제36권12B호
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• pp.1586-1594
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• 2011

LED-ID (light emitting diode - identification) technology is the new paradigm in the identification technology environment. LED-ID system typically needs line of sight (LOS) that supports narrow FOV transceivers links to achieve high data rate. On the other hand, narrow FOV reduces the coverage area. Therefore, the number of tags is increased significantly to cover the whole area. In this case number of link switching is increased when the reader moves within whole coverage area. Link switching delay is the important factor for the moving reader to maintain the communication with high data rate and better QoS. In this paper we propose in literature a new link switching scheme and measure the link switching delay time for LED-ID system. The simulation results show that the proposed link switching scheme is a possible candidate for multi-tag LED-ID system.

• 한국안전학회지
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• 제7권2호
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• pp.71-79
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• 1992

This paper presents a least-square algorithms of lattice structures and their use for adaptive prediction of time series generated from the dynamic system. As the view point of adaptive prediction, a new method of Identification of dynamic characteristics by means of estimating the parameters of linear auto regressive model is proposed. The fast convergence of adaptive lattice algorithms is seen to be due to the orthogonalization and decoupling properties of the lattice. The superiority of the least-square lattice is verified by computer simulation, then predictor coefficients are computed from the linear sequential time data. For the application to the dynamic characteristic analysis of unknown system, the transfer function of ideal system represented in frquency domain and the estimated one obtained by predicted coefficients are compared. Using the proposed method, the damping ratio and the natural frequency of a dynamic structure subjected to random excitations can be estimated. It is expected that this method will be widely applicable to other technical dynamic problem in which estimation of damping ratio and fundamental vibration modes are required.

• Bulletin of the Korean Chemical Society
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• 제30권11호
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• pp.2655-2660
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• 2009

A breed of cattle, i.e., Korean cattle (Hanwoo), was identified based on the DNA mobilities of their microsatellites (MSs) by capillary gel electrophoresis (CGE) with a laser-induced fluorescence (LIF) detector. The MS markers were used for the accurate identification of species-specific genes. The DNA mobilities of the MS markers of Hanwoo and Holstein were measured using a CGE system with a fused-silica capillary (inner diameter of 75 ${\mu}m$, outer diameter of 365 ${\mu}m$, and total length of 50 cm). The capillary was dynamically coated with 1.0% (w/v) polyvinylpyrrolidone ($M_r$ = 1,000,000) and then filled with a mixture of 1.3% (w/v) poly(ethylene oxide) ($M_r$ = 600,000) and 1.9% (w/v) poly(ethylene oxide) (Mr = 8,000,000) as a sieving gel matrix. The species-specific genes of Hanwoo and Holstein were clearly distinguished within 33 min. This CGE assay technique is expected to be a useful analytical method for the fast and accurate identification of breeds of cattle.

• Earthquakes and Structures
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• 제8권4호
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• pp.915-934
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• 2015

Within the context of Structural Health Monitoring (SHM), it is often the case that structural systems are described by uncertainty, both with respect to their parameters and the characteristics of the input loads. For the purposes of system identification, efficient modeling procedures are of the essence for a fast and reliable computation of structural response while taking these uncertainties into account. In this work, a reduced order metamodeling framework is introduced for the challenging case of nonlinear structural systems subjected to earthquake excitation. The introduced metamodeling method is based on Nonlinear AutoRegressive models with eXogenous input (NARX), able to describe nonlinear dynamics, which are moreover characterized by random parameters utilized for the description of the uncertainty propagation. These random parameters, which include characteristics of the input excitation, are expanded onto a suitably defined finite-dimensional Polynomial Chaos (PC) basis and thus the resulting representation is fully described through a small number of deterministic coefficients of projection. The effectiveness of the proposed PC-NARX method is illustrated through its implementation on the metamodeling of a five-storey shear frame model paradigm for response in the region of plasticity, i.e., outside the commonly addressed linear elastic region. The added contribution of the introduced scheme is the ability of the proposed methodology to incorporate uncertainty into the simulation. The results demonstrate the efficiency of the proposed methodology for accurate prediction and simulation of the numerical model dynamics with a vast reduction of the required computational toll.