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SOME RESULTS ON THE LOCALLY EQUIVALENCE ON A NON-REGULAR SEMIGROUP

  • Atlihan, Sevgi
    • Communications of the Korean Mathematical Society
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    • v.28 no.1
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    • pp.63-69
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    • 2013
  • On any semigroup S, there is an equivalence relation ${\phi}^S$, called the locally equivalence relation, given by a ${\phi}^Sb{\Leftrightarrow}aSa=bSb$ for all $a$, $b{\in}S$. In Theorem 4 [4], Tiefenbach has shown that if ${\phi}^S$ is a band congruence, then $G_a$ := $[a]_{{\phi}^S}{\cap}(aSa)$ is a group. We show in this study that $G_a$ := $[a]_{{\phi}^S}{\cap}(aSa)$ is also a group whenever a is any idempotent element of S. Another main result of this study is to investigate the relationships between $[a]_{{\phi}^S}$ and $aSa$ in terms of semigroup theory, where ${\phi}^S$ may not be a band congruence.

Design of a 4kb/s ACELP Codec Using the Generalized AbS Principle (Generalized AbS 구조를 이용한 4kb/s ACELP 음성 부호화기의 설계)

  • 성호상;강상원
    • The Journal of the Acoustical Society of Korea
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    • v.18 no.7
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    • pp.33-38
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    • 1999
  • In this paper, we combine a generalized analysis-by-synthesis (AbS) structure and an algebraic excitation scheme to propose a new 4kb/s speech codec. This codec partly uses the structure of G.729. We design a line spectrum pair (LSP) quantizer, an adaptive codebook, and an excitation codebook to fit the 4 kb/s bit rate. The codec has a 25㎳ algorithmic delay, which corresponds to a 20㎳ frame size and a 5㎳ lookahead. At the bit rates below 4kb/s, most CELP speech codecs using the AbS principle have a drawback that results a rapid degradation of speech quality. To overcome this drawback we use the generalized AbS structure which is efficient for the low bit rate speech codec. LP coefficients are converted to LSP and quantized using a predictive 2-stage VQ. A low complexity algebraic codebook which uses shifting method is used for the fixed codebook excitation, and gains of the adaptive codebook and the fixed codebook are quantized using the VQ. To evaluate the performance of the proposed codec A-B preference tests are done with the fixed rate 8kb/s QCELP. As the result of the test, the performance of the codec is similar to that of the fixed rate 8kb/s QCELP.

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THE ANALYTIC FEYNMAN INTEGRAL OVER PATHS ON ABSTRACT WIENER SPACE

  • Yoo, Il
    • Communications of the Korean Mathematical Society
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    • v.10 no.1
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    • pp.93-107
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    • 1995
  • In their paper [2,3], Cameron and Storvick introduced some classes $S"+m$ and of functionals on classical Wiener spaces $C_0[a,b]$. For such functionals, they showed that the analytic Feynman integral exists and they gave some formulas for this integral. Moreover they obtained that the functionals of the form $$ (1.1) F(x) = exp {\int^b_a{\theta(s,x(x))dx} $$ are in S" where they assumbed that the potential $\delta : [a,b] \times R \to C$ satisfies (i) for each $s \in [a,b], \theta(s,\cdot)$ is the Fourier-Stieltjes transform of $\sigma_s \in M(R)$, (ii) for each Borel subset E of $[a,b] \times R, \sigma_s (E^{(s)})$ is a Borel measurable function of s on [a,b], and (iii) the total variation $\Vert \sigma_s \Vert$ of $\sigma_s$ is bounded as a function of s.tion of s.

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A Hybrid QoS Management Model for Distributed Multimedia Services in Ubiquitous Computing (유비쿼터스 컴퓨팅에서 분산 멀티미디어 서비스를 위한 하이브리드 QoS 관리 모델)

  • Jeong, Chang-Won;Lee, Geon-Yeob;Joo, Su-Chong
    • The KIPS Transactions:PartA
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    • v.15A no.2
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    • pp.101-110
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    • 2008
  • Ubiquitous computing has extended the computer system into the whole physical space and has ushered the emergence of more dynamic distributed systems. This environment require unique QoS parameters for various devices, resources and user requirements. In this paper, we propose a new hybrid QoS management model which defines a static-dynamic QoS parameter that is more appropriate to the ubiquitous computing environment. This model consists of the QoS Control Management Module(QoS CMM) in the client side and the Resource QoS Management Module (RQoS MM) in the server side. The RQoS MM deals with the static QoS parameters and the whole QoS control of the distributed control(QoS CMM) in order to minimize server load in cases of multiple communication. Finally, we present the experimental result of our location based application using a graphical user interface that shows the multimedia service execution of selected client device types such as desktop PC, notebook and PDA.

The Causal Relations of Children's Learned Helplessness and Related Variables:Focusing on the Children's Perception of Self-Competence, Stress and Mother's Childrearing Attitudes (아동의 학습된 무력감과 관련 변인간의 인과관계:아동의 자기능력지각, 스트레스, 모의 양육태도를 중심으로)

  • Lee, Kyung-Nim
    • Korean Journal of Human Ecology
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    • v.8 no.2
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    • pp.227-243
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    • 1999
  • The purpose of this study was to analyze a causal relations of children's learned helplessness, stress, perception of self-competence and mother's childrearing attitudes. The subjects were 370 of 4th and 6th grade in elementary school and the second grade in junior high school in Busan and their's mothers. The instruments used for this study were learned helplessness scale, stress scale, self-perception profile for children, and childrearing attitude scale. The data was analyzed with pearson's correlation, multiple regression and path analysis. The major findings of this study were as follows : 1. Children's global self-worth, social self, age and mother's controlling childrearing attitudes predicted children's stress. 21% of the variance of children's stress was explained by these variables. 2. Children's stress, global self-worth, academic and social self predicted children's learned helplessness. 54% of the variance of children's learned helplessness was explained by these variables. 3. 1) Global self-worth was the first contribution and had a indirect effect through stress as well as a direct effect on children's learned helplessness. 2) Children's stress and academic self had direct effect on children's learned helplessness. 3) Children's social self had a indirect effect through stress as well as a direct effect on children's learned helplessness. 4) Mother's affectionate childrearing attitudes had indirect effect through academic, and social self and global self-worth on children's learned helplessness. Mother's controlling childrearing attitudes had indirect effect through stress on children's learned helplessness. Children's age had a indirect effect through global self-worth and stress and children's sex had a indirect effect through social self on children's learned helplessness.

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Dynamic Behaviour Analysis of Shock Absorber for Vehicle (자동차용 충격 흡수기의 동적거동 해석)

  • 박재우;신상윤;주동우;이시복
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1996.11a
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    • pp.362-370
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    • 1996
  • Even if the shock absorber is developed to Variable S/A or Active S/A, it is necessary to construct data-base or build the dynamic performance characteristic program of Oil S/A. Since both Variable S/A and Active S/A are based on the principle of Oil S/A. To obtain the design technique of Oil S/A, we model the damping mechanism and characteristics of an Oil S/A whose performance was testified. And then it is analyzed the dynamic behaviour characteristics of damping mechanism.

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The Relationship of Father's Child-Rearing Behavior, Parent's Marital Conflict as Perceived by Children, and Children's Aggression (아동이 지각한 부부갈등과 아버지의 양육행동 및 아동의 공격성과의 관계)

  • Lee, Jee-Hee;Moon, Hyuk-Jun
    • Journal of the Korean Home Economics Association
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    • v.45 no.6
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    • pp.77-88
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    • 2007
  • The purpose of this study was to examine determine the relationships among father's child-rearing behavior, parent's marital conflict as perceived by children, and children's aggression. The subjects of this study were included 245 students of 6th-grade students living in Gyeonggi-do. Each participant completed a child's perception of parent's rearing behavior, a parental conflict scale, and a children's aggression scale. Data was analyzed using via the following methods: frequency, percentage, mean, t-test, Pearson's correlation, multiple regression analysis, and Cronbach's a. As a result of this study, it was revealed determined that a there were a significant relationship existed with regard to between the father's rearing behavior, the parent's marital conflict, and the children's aggression. This study showed indicated that the father's rearing behavior, rather than the parent's marital conflict, was the more influential on the with regard to children's aggression.

MULTIPLICATIVE GROUP IN A FINITE RING

  • Han, Juncheol
    • Bulletin of the Korean Mathematical Society
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    • v.30 no.2
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    • pp.213-221
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    • 1993
  • In this paper, we will show that the multiplicative group G in a finite ring R with identity 1 has a (B, N)-pair satisfying the following conditions; (1) G=BNB where B and N are subgroups of G. (2) B.cap.N is a normal subgroup of N and W = N/(B.cap.N), is generated by a set S = { $s_{1}$, $s_{2}$, .., $s_{k}$} where $s_{i}$.mem.N/(B.cap.N), $s_{i}$$^{2}$.iden.1 and $s_{i}$.neq.1. (3) For any s.mem.S and w.mem.W, we have sBw.contnd.BwB.cup.BswB. (4) We have sBs not .subeq. B for any s.mem.S. When G, B, N and S satisfy the above conditions, we say that the quadruple (G, B, N, S) is a Tits system. The group W is called the Weyl gorup of the Tits system.ystem.m.

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The Role of S100A8 and S100A9 in Differentiation of Human Eosinophilic Leukemia Cells, EoL-1

  • Kim, In Sik;Gu, Ayoung;Lee, Ji-Sook
    • Biomedical Science Letters
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    • v.23 no.1
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    • pp.44-47
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    • 2017
  • S100A8 and S100A9 are associated with myeloid cell differentiation, chemotactic activities, adhesion of neutrophils, and apoptosis. In this study, we investigated the contribution of S100A8 and S100A9 to differentiation of the human eosinophilic leukemia cell line, EoL-1. S100A8 and S100A9 increased the number of vacuole per one cell and the protein expression of EPO and MBP. Rottlerin, an inhibitor of protein kinase C delta ($PKC{\delta}$), inhibited the EoL-1 cell differentiation induced by S100A8 and S100A9. These results suggest that S100A8 and S100A9 may regulate the differentiation of eosinophilic progenitors. Moreover, these findings may shed light on elucidation of eosinophil differentiation due to S100 proteins.

C(S) extensions of S-I-BCK-algebras

  • Zhaomu Chen;Yisheng Huang;Roh, Eun-Hwan
    • Communications of the Korean Mathematical Society
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    • v.10 no.3
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    • pp.499-518
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    • 1995
  • In this paper we consider more systematically the centralizer C(S) of the set $S = {f_a $\mid$ f_a : X \to X ; x \longmapsto x * a, a \in X}$ with respect to the semigroup End(X) of all endomorphisms of an implicative BCK-algebra X with the condition (S). We obtain a series of interesting results. The main results are stated as follows : (1) C(S) with repect to a binary operation * defined in a certain way forms a bounded implicative BCK-algebra with the condition (S). (2) X can be imbedded in C(S) such that X is an ideal of C(S)/ (3) If X is not bounded, it can be imbedded in a bounded subalgebra T of C(S) such that X is a maximal ideal of T. (4) If $X (\neq {0})$ is semisimple, C(S) is BCK-isomorphic to $\prod_{i \in I}{A_i}$ in which ${A_i}_{i \in I}$ is simple ideal family of X.

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