• Title/Summary/Keyword: L-S theory

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A Modfication Study on Horizontal Earth Pressure in the Symmetrically Sloped Backfilled Space (대칭적으로 경사진 되메움된 공간에서의 수평토압에 대한 수정연구)

  • Moon, Chang-Yeul
    • Journal of the Korean GEO-environmental Society
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    • v.4 no.2
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    • pp.57-64
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    • 2003
  • Marston (1913) and Spangler's (1982) theory was widely used in the analysis of the earth pressure of the narrow and long excavated ditch type backfield ground. Their theory was more clearly explained by expressing the minor principle stress arch connecting the minor principle stress link induced by interaction between the excavated wall surface and the backfilled earth. which was done by R.L. Handy(1985). Later C.G. Kellogg(1993) extended the study from vertical symmetric to incline symmetric in the backfill space type research. In the C.G. Kellogg's study, it is assumed that the resistance of wall friction on the sloping wall could be replaced by the internal friction angle in the sloping section bottom. In the study, the resistance of wall friction in the sloping section bottom, which was applied by C.G. Kellogg, would be different in magnitude with the resistance of wall friction in sloping section. The magnitude is expected to affect in the earth pressure calculation and verified by the soil test box, the C.G. Kellogg's theory, the numerical analysis and the modified C.G. Kellogg's theory considering the friction resistance to influence the incline wall.

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MULTIPLICITY RESULTS OF CRITICAL LOCAL EQUATION RELATED TO THE GENUS THEORY

  • Mohsen Alimohammady;Asieh Rezvani;Cemil Tunc
    • Communications of the Korean Mathematical Society
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    • v.38 no.4
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    • pp.1045-1061
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    • 2023
  • Using variational methods, Krasnoselskii's genus theory and symmetric mountain pass theorem, we introduce the existence and multiplicity of solutions of a parameteric local equation. At first, we consider the following equation $$\{-div[a(x,{\mid}{\nabla}u{\mid}){\nabla}u]\,=\,{\mu}(b(x){\mid}u{\mid}^{s(x)-2}-{\mid}u{\mid}^{r(x)-2})u\;in\;{\Omega},\\u\,=0\,on\;{\partial}{\Omega},$$ where Ω⊆ ℝN is a bounded domain, µ is a positive real parameter, p, r and s are continuous real functions on ${\bar{\Omega}}$ and a(x, ξ) is of type |ξ|p(x)-2. Next, we study boundedness and simplicity of eigenfunction for the case a(x, |∇u|)∇u = g(x)|∇u|p(x)-2∇u, where g ∈ L(Ω) and g(x) ≥ 0 and the case $a(x,\,{\mid}{\nabla}u{\mid}){{\nabla}u}\,=\,(1\,+\,{\nabla}u{\mid}^2)^{\frac{p(x)-2}{2}}{\nabla}u$ such that p(x) ≡ p.

Theory bulding in library and information science based on research method analysis (연구방법론 분석에 의한 문헌정보학 이론개발에 관한 연구)

  • 정동열
    • Journal of the Korean Society for information Management
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    • v.10 no.2
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    • pp.23-41
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    • 1993
  • L~brary and ~nformat~on sclence has been critic~zed for its dearth of conceptually framed, creative research which has been narrowly faused, fragmented. and desgned to solve s~tuational problems. Durmg recent years. a crit~cal concern of scholars in the l~brary and information proiessions has been a need for creative research. Research is the critical element for developing a theoret~cal base in wh~ch to enhance prxtlce of the profess~on and to gu~de ~ t s future development. The purpose of thls paper are to ( 1 1 delineate various levels of theory with implications for research methods. and (2) analyze research methods and contents of prevlous research publ~shtd In Korea durmg last two decades. and ( 3 ) purpose several d~rections toward theory building in vlew of both theoretical and operat~onal aspects.

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Existence theorems of an operator-valued feynman integral as an $L(L_1,C_0)$ theory

  • Ahn, Jae-Moon;Chang, Kun-Soo;Kim, Jeong-Gyoo;Ko, Jung-Won;Ryu, Kun-Sik
    • Bulletin of the Korean Mathematical Society
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    • v.34 no.2
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    • pp.317-334
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    • 1997
  • The existence of an operator-valued function space integral as an operator on $L_p(R) (1 \leq p \leq 2)$ was established for certain functionals which involved the Labesgue measure [1,2,6,7]. Johnson and Lapidus showed the existence of the integral as an operator on $L_2(R)$ for certain functionals which involved any Borel measures [5]. J. S. Chang and Johnson proved the existence of the integral as an operator from L_1(R)$ to $C_0(R)$ for certain functionals involving some Borel measures [3]. K. S. Chang and K. S. Ryu showed the existence of the integral as an operator from $L_p(R) to L_p'(R)$ for certain functionals involving some Borel measures [4].

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Synchronization of Chaos Circuit (카오스 회로 동기화)

  • Bae, Young-Chul
    • Proceedings of the KIEE Conference
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    • 2000.07d
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    • pp.2404-2406
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    • 2000
  • Chua's circuit is a simple electronic network which exhibits a variety of bifurcation and attractors. The circuit consists of two capacitors, an inductor, a linear resistor, and a nonlinear resistor. In this paper, a transmitter and a receiver using two identical Chua's circuits are proposed and synchronizations of a T or ${\pi}$ type power line are investigated. Since the synchronization of the power line system is impossible by coupled synchronization, theory having both the drive-response and the coupled synchronization is proposed. As a result, the chaos synchronization has delay characteristics in the power line transmission system caused by the line parameters L and C

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LOCAL SPECTRAL THEORY AND QUASINILPOTENT OPERATORS

  • YOO, JONG-KWANG
    • Journal of applied mathematics & informatics
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    • v.40 no.3_4
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    • pp.785-794
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    • 2022
  • In this paper we show that if A ∈ L(X) and R ∈ L(X) is a quasinilpotent operator commuting with A then XA(F) = XA+R(F) for all subset F ⊆ ℂ and 𝜎loc(A) = 𝜎loc(A + R). Moreover, we show that A and A + R share many common local spectral properties such as SVEP, property (C), property (𝛿), property (𝛽) and decomposability. Finally, we show that quasisimility preserves local spectrum.

Computational Materials Engineering: Recent Applications of VASP in the MedeA® Software Environment

  • Wimmer, Erich;Christensen, Mikael;Eyert, Volker;Wolf, Walter;Reith, David;Rozanska, Xavier;Freeman, Clive;Saxe, Paul
    • Journal of the Korean Ceramic Society
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    • v.53 no.3
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    • pp.263-272
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    • 2016
  • Electronic structure calculations have become a powerful foundation for computational materials engineering. Four major factors have enabled this unprecedented evolution, namely (i) the development of density functional theory (DFT), (ii) the creation of highly efficient computer programs to solve the Kohn-Sham equations, (iii) the integration of these programs into productivity-oriented computational environments, and (iv) the phenomenal increase of computing power. In this context, we describe recent applications of the Vienna Ab-initio Simulation Package (VASP) within the MedeA$^{(R)}$ computational environment, which provides interoperability with a comprehensive range of modeling and simulation tools. The focus is on technological applications including microelectronic materials, Li-ion batteries, high-performance ceramics, silicon carbide, and Zr alloys for nuclear power generation. A discussion of current trends including high-throughput calculations concludes this article.

The Effect of Mixture Component in a Gasoline Engine on Combustion (The Effect of Combustion Velocity) (가솔린 기관(機關)의 혼합기(混合氣) 성분(成分)이 연소특성(燃燒特性)에 미치는 영향(影響) (연소(燃燒) 속도(速度)에 미치는 영향(影響)))

  • Song, J.I.
    • Journal of ILASS-Korea
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    • v.2 no.4
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    • pp.47-53
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    • 1997
  • By using a premixed laminar burner, the effect of mixture component on laminar burning velocity($S_L$) was investigated. The following was made clear ; (1)As the humidity$(H_2O)$, $CO_2$ and Ar in mixture is increased, $S_L$ decreased in proportion to quantity of those dilution gases. (2) The heat reaction theory says that mean thermal conductivity $(\lambda_m)$, specific heat $(C_{pm})$ of mixture and adiabatic flame temperatures $(T_b)$ affect $S_L$. As a result of theoretical analysis, the effect of $\lambda_m\;and\;C_{pm}$ on $S_L$ is less than 1/25 of the effect of $T_b$, so the effect of $\lambda_m\;and\;C_{pm}$ can be ignored. (3) From experimental results, it was confirmed that $\ln(S_L)$ is proportional to $(1/T_b)$, that is, the effect of $H_2O$ on $S_L$ is mainly caused by changes of $T_b$. This conclusion was verified by the fact increases of $H_2O,\;CO_2$ and Ar decrease the intensity of radiation typical $C_2$, CH, and OH in the same manner.

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THE BASIS AUTOMATON FOR THE GIVEN REGULAR LANGUAGE

  • Vakhitova, A.A.
    • Journal of applied mathematics & informatics
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    • v.6 no.3
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    • pp.851-858
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    • 1999
  • A new problem of the theory of finite automata (Rabin-Scott's automata) is considered. So called basis automaton for the given regular language l is defined. this automaton is unique for the given L, it is defined by two au-tomata of canonical form: for L and for its inverse language LR. Some properties of basis automata are considered. Such properties make these automata most convenient for using in some special tasks dealing with the given regular language.