• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 하계종합학술대회 논문집
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• pp.1029-1032
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• 1999

Muscle based face image synthesis is one of the most realistic approach to realize life-like agent in computer. Facial muscle model is composed of facial tissue elements and muscles. In this model, forces are calculated effecting facial tissue element by contraction of each muscle strength, so the combination of each muscle parameter decide a specific facial expression. Now each muscle parameter is decided on trial and error procedure comparing the sample photograph and generated image using our Muscle-Editor to generate a specific face image. In this paper, we propose the strategy of automatic estimation of facial muscle parameters from 2D marker movement using neural network. This also 3D motion estimation from 2D point or flow information in captered image under restriction of physics based face model.

• JSTS:Journal of Semiconductor Technology and Science
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• 제16권6호
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• pp.736-744
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• 2016

Network on chip (NoC) is an emerging technology in the field of multi core interconnection architecture. The routers plays an essential components of Network on chip and responsible for packet delivery by selecting shortest path between source and destination. State-of-the-art NoC designs used routing table to find the shortest path and supports four ports for packet transfer, which consume high power consumption and degrades the system performance. In this paper, the multi port multi core router architecture is proposed to reduce the power consumption and increasing the throughput of the system. The shared buffer is employed between the multi ports of the router architecture. The performance of the proposed router is analyzed in terms of power and current consumption with conventional methods. The proposed system uses Modelsim software for simulation purposes and Xilinx Project Navigator for synthesis purposes. The proposed architecture consumes 31 mW on CPLD XC2C64A processor.

• BMB Reports
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• 제34권4호
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• pp.305-309
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• 2001

MatR in Rhizobium trifolii is a malonate-responsive transcription factor that regulates the expression of genes, matABC, enabling decarboxylation of malonyl-CoA into acetyl-CoA, synthesis of malonyl-CoA from malonate and CoA, and malonate transport. According to an analysis of the amino acid sequence homology, MatR belongs to the GntR family The proteins of this family have two-domain folds, the N-terminal helix-turn-helix DNA-binding domain and the C-terminal ligand-binding domain. In order to End the malonate binding site and amino acid residues that interact with RNA polymerase, a site-directed mutagenesis was performed. Analysis of the mutant MatR suggests that Arg-160 might be involved in malonate binding, whereas Arg-102 and Arg-174 are critical for the repression activity by interacting with RNA polymerase.

• Macromolecular Research
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• 제14권1호
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• pp.34-37
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• 2006

Attaching the organosilyl groups to macromolecular chains of 2-hydroxyethyl methacrylate (HEMA) should lead to important modifications of polymer properties. t-$BuMe_{2}Si$ and cubane-l, 4-dicarboxylic acid (CDA) were covalently linked with 2-hydroxyethyl methacrylate (HEMA). The silyl-linked HEMA is abbreviated as TSMA, while cubane-l ,4-dicarboxylic acid (CDA) linked to two HEMA groups is the cross-linking agent (CA). Free radical cross-linking copolymerization of TSMA and HEMA with various ratios of CA as the cross-linking agent was carried out at 60-70$^{circ}C$. The compositions of the cross-linked, three-dimensional polymers were determined by FTIR spectroscopy. The glass transition temperature ($T_{g}$) of the network polymers was determined calorimetrically. The $T_{g}$ of the network polymer increased with increasing cross-linking degree.

• JSTS:Journal of Semiconductor Technology and Science
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• 제11권4호
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• pp.344-350
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• 2011

Higher integrated density in 3D ICs also brings the difficulties of routing, which can cause the routing failure or re-design from beginning. Hence, precise congestion estimation at the early physical design stage such as floorplan is beneficial to reduce the total design time cost. In this paper, an effective estimation method of routing congestion is proposed for 3D ICs at floorplan stage. This method uses synthesized virtual signal nets, power/ground network and clock network to achieve the estimation. During the synthesis, the TSV location is also under consideration. The experiments indicate that our proposed method had small difference with the estimation result got at the post-placement stage. Furthermore, the comparison of congestion maps obtained with our method and global router demonstrates that our estimation method is able to predict the congestion hot spots accurately.

• 한국전자파학회논문지
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• 제8권6호
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• pp.363-644
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• 1997

본 논문에서는 그라운드변 상의 개구를 통해 마이크로스트립 패치로 결합을 일으키는 구조를 갖는 PCS 기지 국용 정형 빔 배열 안테나 설계와 제작에 관하여 다룬다. 최적의 정형 빔 패턴은 안테나 합성법으로 얻어졌다. 배 열된 패치들 사이에서의 결합을 고려한 배열 안테나와 급전회로는 CAD tool을 이용하여 설계되었다. 급전 회로 는 최적의 정형 빔 패턴을 얻기 위해서 Wilkinson 전력 분배기를 이용하여 설계되었다. 설계 결과와 측정 결과가 비교되어진다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 C
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• pp.1708-1710
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• 2000

The synthesis and characterization of polymers for organic Metal/Insulator/Metal(MIM) devices were investigated from LB films. The physicochemical properties of the LB films were examined by UV absorption spectrum and AFM. The AFM images showed for network structure of polyurethane monolayer that the film formed an unsymmetry mesh with intermolecular interaction within the large scale. The stable images are probably due to a strong interaction between the monolayer film and Si substrate. We are unable to obtain molecular resolution in images of the films but did see a marked contrast between images of the bare substrate and those with the network structure film deposited onto it.

• ETRI Journal
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• 제30권4호
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• pp.546-554
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• 2008

Phase-locked loops (PLLs) are among the most important mixed-signal building blocks of modern communication and control circuits, where they are used for frequency and phase synchronization, modulation, and demodulation as well as frequency synthesis. The growing popularity of PLLs has increased the need to test these devices during prototyping and production. The problem of distinguishing and classifying the responses of analog integrated circuits containing catastrophic faults has aroused recent interest. This is because most analog and mixed signal circuits are tested by their functionality, which is both time consuming and expensive. The problem is made more difficult when parametric variations are taken into account. Hence, statistical methods and techniques can be employed to automate fault classification. As a possible solution, we use the back propagation neural network (BPNN) to classify the faults in the designed charge-pump PLL. In order to classify the faults, the BPNN was trained with various training algorithms and their performance for the test structure was analyzed. The proposed method of fault classification gave fault coverage of 99.58%.

• 한국음향학회:학술대회논문집
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• 한국음향학회 2002년도 하계학술발표대회 논문집 제21권 1호
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• pp.159-162
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• 2002

본 논문에서는 음성합성을 위한 의사형태소 품사 태깅 시스템의 속도를 개선하는 방법으로 정확률을 다소 희생하더라도 속도개선이 될 수 있는 방법을 제안하고자 한다. 형태소 해석 시에는 종성으로 올 수 있는 자모를 제외한 나머지에 대해서는 음절단위로 구성하는 변형된 Tabular 파싱법으로 해석하는데, 여기에다 일반적으로 적용 가능한 몇 가지의 규칙을 추가함으로써 해석 가능한 노드들을 줄였다. 태깅 시에는 한국어의 특성상 어절 하나씩을 품사 태깅하였을 경우에도 상당히 정확하다는 점을 이용하여 어절 내부에서는 full search 를 하고 그 다음 어절은 이전 어절의 제일 높은 값을 가지는 품사열 정보를 활용하는 방법을 제안한다. 제안한 시스템은 32 개 품사 태그셋에 2 만 형태소 사전을 이용해 실험한 결과, 기존의 시스템보다 약 $60\%$이상의 속도 개선을 보였으며, 정확률은 약 $1\%$ 정도 떨어졌다.

• 공업화학
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• 제9권5호
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• pp.763-767
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• 1998

콜레스테롤을 갖는 계면활성제를 합성하고, 이 계면활성제를 단량체[tetradeca(ethylene glycol) diacrylate]와 함께 물 속에서 음파 파쇄하여 vesicle 용액을 형성한 다음, 이 용액내의 물을 증발시켜, 분자들이 규칙적으로 배열된 분자 다층 구조를 갖는 막을 합성하였다. 이 막에 들어 있는 단량체들을 광중합하여, 고분자가 계면활성제들의 층과 층 사이에 들어 있는 분자 다층 구조를 합성하였다. 중합이 끝난 후 유기 용매를 사용하여 계면활성제를 추출하여 이차원적인 구조를 갖는 얇은 박막 층으로 이루어진 고분자 막을 합성하였다. 형성된 이차원 구조를 갖는 고분자 막의 물성을 측정하였는데, 막의 물성으로는 인장 강도, 신장율, 팽윤 등을 측정하였다.