• Journal of Korea Society of Digital Industry and Information Management
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• v.6 no.4
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• pp.33-43
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• 2010

In this paper, we propose a floral scent recognition using odor sensors and a odor display using odor distribution system. Proposed odor recognition has method of correlation coefficient between sensors that select optimal sensors in floral scent recognition system of selective multi-sensors. Proposed floral scent recognition system consists of four module such as floral scent acquisition module, optimal sensor decision module, entropy-based floral scent detection module, and floral scent recognition module. Odor distribution system consists of generation module of distribution information, control module of distribution, output module of distribution. We applied to floral scent recognition for performance evaluation of proposed sensors decision method. As a result, application of proposed method with floral scent recognition obtained recognition rate of 95.67% case of using 16 sensors while applied floral scent recognition system of proposed sensor decision method confirmed recognition rate of 96% using only 8 sensors. Also, we applied to odor display of proposed method and obtained 3.18 thorough MOS experimentation.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.08a
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• pp.261-261
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• 2010

Photonic band gap (PBG) materials have been of great interest due to their potential applications in science and technology. Their applications can be further extended when PBG becomes tunable against various chemical and electrical stimuli. In recent, it was found that tunable photonic band gap materials can be achieved by incorporating stimuli-responsive smart gels into PBG materials. For example, the characteristic volume phase transition of gels in response to the various external stimuli including temperature, pH, ionic strength, solvent compositions and electric field were recently combined with the unique optical properties of photonic crystals to form unprecedented highly responsive optical components. Since these responsive photonic crystals are capable of reversibly converting chemical or electrical energy into characteristic optical signals, they have been considered as a good platform for label-free chemical or biological detection, actuators or optical switches as well as a model system for investigating gel swelling behavior. Herein, we report block copolymer photonic gels self-assembled from polystyrene-b-poly (2-vinyl pyridine) (PS-b-P2VP) block copolymers. In this talk, we are going to demonstrate that selective swelling of lamellar structure can be effectively utilized for fabricating PBG materials with extremely large tunability. Optical properties and their applications will be discussed.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2012.11a
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• pp.136-139
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• 2012

본 논문에서는 에지 검출기를 이용하여 선택적 디인터레이싱 방법을 제안한다. 제안하는 알고리즘은 LA 방법, M-ELA 방법 그리고 DOI 방법을 기본 방법으로 사용하였다. 제안한 방법에서 크게 3단계로 나눠진다. 먼저 비월주사 영상을 M-ELA 방법을 이용하여 에지의 방향을 예측한 후, 잃어버린 화소 값을 보간한다. 여기서 더 정밀한 에지를 검출하기 위해 소벨 연산을 사용하여 에지 방향에 따라 LA 방법, M-ELA 방법 그리고 DOI 방법을 선택적으로 보간하는 디인터레이싱 방법을 제안한다. 다양한 실험 영상에 대해 객관적 및 주관적 평가를 통해 제안한 알고리즘이 기존의 디인터레이싱 알고리즘보다 우수한 성능을 확인한다.

• Korean Journal of Poultry Science
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• v.31 no.2
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• pp.129-136
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• 2004

Avian influenza viruses infect humans, horses, swine, other mammals, and a wide variety of domesticated and wild birds. Modem poultry industries worldwide are at risk of infection with avian influenza. Low pathogenic avian influenza can easily change to highly pathogenic form especially when introduced into areas of high density commercial poultry. Outbreaks of highly pathogenic avian influenza are becoming progressively more expensive to control according to the growth of the poultry industry worldwide. Future strategies for avian influenza control and prevention should involve a combination of early detection and characterization of virus using advanced molecular biologic techniques, quarantine, selective depopulation and vaccination of flocks.

• Journal of KSNVE
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• v.7 no.2
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• pp.255-260
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• 1997

This paper describes 3-dimensional volume array of 4 microphones including a reference microphone which is capable of imaging wideband noise source position in 2-dimensional image plane. The cross correlation function and corresponding imaging function between a reference microphone and other microphone, are derived as a function of noise source position. The magnitude of the imaging function gives noise source mapping in image plane. Since the image plane is selective from a rectangular and a cylindrical plane, noise source position information such as range and bearing relative to the array is identified very much easily. Simulation results for typical source configurations confirms the applicability of the proposed array in noise control field.

• Analytical Science and Technology
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• v.16 no.6
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• pp.438-442
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• 2003

The fungicides, used for grape growth and remained in the wine products from domestic and foreign countries such as vinclozolin, dichlofluanid, penconazole, procymidone were quantitatively analyzed after solid-phase extraction using a GC/MS-SIM method. The results obtained were as follows: for all the samples, the content of procymidone was in the range from 2.2 to $76.1{\mu}g/L$, recoveries 81.3-93.1 %, and standard deviation 1.4-3.4 %.

• Analytical Science and Technology
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• v.8 no.4
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• pp.535-538
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• 1995

This study employs the variety of mixtures of XAD resin and active carbons as concentration base for solid phase extraction (SPE) which has been widely used to preconcentrate and purify phenol and chlorophenols in determination of environmental water samples. In this study, we employed variety of mixtures of copolymer based XAD-4 resin with active carbons. This cartridges shows advantages of both materials, such as better affinity to phenol by active carbon and better mechanical stabilities from XAD resin. The better enrichment factor, pretreatment time, recoveries and limit of detection (LOD) were achieved by the attempts to pack precolumns with both meterials for preconcentration.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1997.11a
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• pp.9-13
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• 1997

본 논문에서는 two-ray 시간선택성 레일레이 페이딩 채널상에서 DPSK 신호를 차동검출 (differential detection)할 때 심볼에러율을 분석한다. 현재까지 수행된 많은 연구는 주파수 선택성 페이딩 채널 및 단일 경로 시간선택성 페이딩 채널을 대상으로 하였고, 다경로 시간선택성 페이딩 채널을 대상으로 한 예는 극히 드물다. 또한 다경로 시간선택성 페이딩 채널을 가장 간단히 모델링 할 수 있는 two-ray 페이딩 채널에 대한 연구도 지금까지 수행된 예가 극히 적다. 본 논문에서는 심볼열의 형태에 따라 수신신호들간의 관계를 세가지 그룹으로 나눈 후 각각의 경우에 대하여 위상 옵셋값을 계산하는 방식을 취하였다. 이와 같이 계산된 위상옵셋과 신호대 잡음비를 인자로 하여 차동검출된 신호가 가지는 위상의 확률밀도 함수를 계산하고 이 함수를 이용하여 심볼에러율을 계산하였다. 결과로부터 two-ray 페이딩 채널의 특성을 결정짓는 지연시간과 지연신호의 전력이 증가함에 따라 위상 옵셋값 및 에러율이 모두 증가하는 것을 확인하였다.

• Journal of electromagnetic engineering and science
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• v.7 no.2
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• pp.74-82
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• 2007

The performances of M-ary DPSK(MDPSK) for diversity reception theoretically are derived, using an L-branch selection combining(SC) in frequency-nonselective slow Nakagami fading channels. For integer values of the Nakagami fading parameter m, An exact closed-form symbol error rate(SER) multichannel performance that can be easily evaluated via numerical integration is presented. Finally, we compare these analyses with numerical analyses with integral-form expressions for the performance of MDPSK signals under the effect of two-branch SC diversity over slow and nonselective Rician fading channels with additive white Gaussian noise(AWGN).

• Bulletin of the Korean Chemical Society
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• v.23 no.10
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• pp.1456-1458
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• 2002

A simple, sensitive and selective determination method of oxalate has been investigated based on the fluorescence enhancement of $Eu^{3+}$-TTA complex due to the formation of $Eu^{3+}$-TTA-oxalate ternary complex. An emission peak of $Eu^{3+}$-TTA, which is increased linearly with addition of oxalate, occurs at 610 nm in aqueous solution with excitation at 306 nm. The linear range of the calibration curve is 1 ${\times}$$10^{-6}$-8 ${\times}$$10^{-6}$ M and the detection limit is 1 ${\times}$$10^{-6}$ M. The effects of foreign ions were studied. The present method was applied to determine oxalate of two synthetic samples.