• Kyungpook Mathematical Journal
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• 제46권4호
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• pp.591-595
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• 2006

In this paper, we define ${\Delta}^m$-Lacunary strongly convergent sequences defined by sequence of moduli and give various properties and inclusion relations on these sequence spaces.

• 대한전자공학회논문지TC
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• 제47권7호
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• pp.93-101
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• 2010

본 논문에서는 GF(2)에서의 두 생성다항식에 의해 생성된 M-sequence로 Gold-Sequence를 생성한 후, Permutation을 해줌으로써 Hadamard 행렬의 특성을 가지게 됨을 살펴보았다. M-sequence는 선형 귀환 천이 레지스터 부호 생성기(Linear feedback shift register code generator)에 의해 생성되었으며, 두 개의 M-sequence에 의해 생성된 Gold-sequence의 첫 열에 $8\times1$의 영행렬을 추가하고 Permutation을 시켜줌으로써 Hadamard 행렬의 주요 성질인 직교성(Orthogonal)과 한 행렬과 이 행렬의 Transpose시킨 행렬의 결과가 단위행렬이 되고, 역행렬은 element-wise Inverse가 되며, 고속 Jacket행렬의 성질을 만족한다. 또한 선형 귀환 축차 생성기를 통하여 생성된 M-sequence의 1행과 1열을 추가함으로써 위에서 언급한 Hadamard 행렬의 주요 성질을 만족하고 L-matrix 와 S-matrix 를 통하여 고속변환이 가능함을 보인다.

• 한국정보통신학회논문지
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• 제7권4호
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• pp.630-637
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• 2003

본 논문에서는 디지털 데이터의 저작권 보호와 무단 복제 방지를 위해 기존의 M-sequence 대신 카오스 시퀀스를 이용한 새로운 워터마킹 방법에 대하여 제안한다. 강인성과 보안성은 워터마킹 처리에 있어 중요한 요소이다. 디지털 영상을 웨이브렛 변환한 후 각 부대역의 계수값들을 인간의 시각 체계를 고려한 다중 임계값으로 분류하고 카오스 시퀀스와 삽입할 워터마크 영상 그리고 랜덤 발생기로 생성된 다중 워터마크 가중치를 이용하여 워터마크 영상을 삽입하였다. 워터마크 검출은 웨이브렛 변환된 각 부대역간의 차신호를 이용하여 검출하였으며 여러가지 가능한 공격에 대해 성능 실험을 하였다. 카오스 시퀀스는 생성하기가 매우 쉬우며, 초기 값에 따라 전혀 다른 시퀀스를 생성하므로 M-sequence에 비해 보안성(security)면에서 더욱 안전하다는 장점을 갖고 있다.

• Kyungpook Mathematical Journal
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• 제50권3호
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• pp.389-397
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• 2010

In this paper we introduce the new generalized difference sequence space $\ell_\infty$($\Delta_v^n$, M,p,q,s), $\bar{c}$($\Delta_v^n$,M,p,q,s), $\bar{c_0}$($\Delta_v^n$,M,p,q,s), m($\Delta_v^n$,M,p,q,s) and $m_0$($\Delta_v^n$,M,p,q,s) defined over a seminormed sequence space (X,q). We study some of it properties, like completeness, solidity, symmetricity etc. We obtain some relations between these spaces as well as prove some inclusion result.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1994년도 Proceedings of the Korea Automatic Control Conference, 9th (KACC) ; Taejeon, Korea; 17-20 Oct. 1994
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• pp.7-12
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• 1994

This paper describes an outline of pseudorandom M-sequence and its applications to measurement and control engineering. At first, generation and properties of M-sequence is briefly described and then its applications to delay time measurement, information transmission by use of M-array, two dimensional positioning, fault detection of logical circuit, fault detection of RAM, linear and nonlinear system identification.

• Kyungpook Mathematical Journal
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• 제53권3호
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• pp.319-332
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• 2013

The sequence space $m(M,{\phi})^F$ of fuzzy real numbers is introduced. Some properties of this sequence space like solidness, symmetricity, convergence-free etc. are studied. We obtain some inclusion relations involving this sequence space.

• BMB Reports
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• 제30권1호
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• pp.80-84
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• 1997

The synthesis and secretion of human angiogenin in E. coli by the natural leader sequence has been studied. We constructed a recombinant plasmid containing human angiogenin cDNA which encompassed all the coding region including leader sequence required for secretion. The recombinant plasmid was introduced into a suitable E. coli host. The angiogenin was detected in the culture medium and periplasm upon the induction of gene expression. The molecular weight of the secreted angiogenin was identical to that of authentic angiogenin purfied from human plasma when estimated by SDS-PAGE and immunoblotting. showing that the natural leader sequence was recognized and processed by the secretion machinery of E. coli. The angiogenin concentration in the culture medium reached a maximum within 2 h when expressed at $37^{\circ}C$ with 0.02~2 mM IPTG. In contrast, the expression level increased gradually over time up to 11 h at $23^{\circ}C$ with 0.002~2 mM IPTG and at $37^{\circ}C$ with 0.002 mM IPTG.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국제학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.943-946
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• 1988

A simple method is proposed for determining the frequency response function G(j.omega.) of a system using a pair of characteristic M-sequences (maximum length linear feed back shift register sequence). When a characteristic M-sequence is sampled with q$_{1}$ and q$_{2}$ both of which are coprime with N, where N is the period of the M-sequence, the obtained pair of sequences have conjugate complex frequency spectrum. Making use of this fact, two charcteristic M-sequences having conjugate complex frequency spectrum are applied to a system to be measured. Since the magnitude of spectrium of M-sequence is known, the gain of G(j.omega.) is directly obtained from the Fourier transform of the system output. The phase of G(j.omega.) is obtained simply by taking the average of the two phases of output spectrum.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1998년도 제13차 학술회의논문집
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• pp.271-274
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• 1998

This paper describes a new method for separation of the Volterra kernels which are identified by use of M-sequence. One of the authors has proposed a method for identification of Volterra kernels of nonlinear systems using M-sequence and correlation technique. When M-sequence are applied to a nonlinear systems, the cross-correlation function between the input and the output of the nonlinear systems includes cross-sections of high-order Volterra kernels. However, if various order Volterra kernels exixt on the obtained cross-correlation function, it is difficult to separate the Volterra kernels. In this paper, the authors show that the magnitude of Volterra kernels is maginified by the amplitude of M-sequence according to the order of Volterra kernels. By use of this property, each order Volterra kernels is obtained by solving linear equations. Simulations are carried out for some nonlinear systems. The results show that Volterra kernels can be separated in each order successfully by the proposed method.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2570-2575
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• 2003

Monitoring a power transmission line is significant for power electric companies. In this paper, we propose a new method for detecting an fault point of power transmission line by use of M-sequence correlation technique. In this method, detecting signal is used as one or plural M-sequences ( same characteristic polynomial, including normal and reverse mark, synchronized ). In receiving point, we make same sequence with the input one and take crosscorrelation function between M-sequence and the received signal. We can see transfer fanctions of plural paths between inputs and a output taps separated from different of delay times on the crosscorrelation function, and from these transfer fanctions, so we compare them when fault occurred with in usual.