• Korean Journal of Mathematics
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• 제28권4호
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• pp.699-715
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• 2020

In this paper, we give estimates of the Hankel determinant H₂(1) in a novel class 𝓝 (𝜀) of analytical functions in the unit disc. In addition, the relation between the Fekete-Szegö function H₂(1) and the module of the angular derivative of the analytical function p(z) at a boundary point b of the unit disk will be given. In this association, the coefficients in the Hankel determinant b₂, b₃ and b₄ will be taken into consideration. Moreover, in a class of analytic functions on the unit disc, assuming the existence of angular limit on the boundary point, the estimations below of the modulus of angular derivative have been obtained.

• 한국세라믹학회:학술대회논문집
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• 한국세라믹학회 2002년도 추계총회 및 연구발표회 초록집
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• pp.199.2-199
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• 2002

• 대한수학회논문집
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• 제26권2호
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• pp.253-259
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• 2011

Let A and B be Banach algebras with unit. Here we prove that an approximate algebra homomorphism f : A ${\rightarrow}$ B, in the sense of Rassias, is an algebra homomorphism.

• Nonlinear Functional Analysis and Applications
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• 제26권3호
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• pp.443-449
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• 2021

In this paper, we give some corrections and comments about a result which is contained in a published paper in [1].

• Advances in materials Research
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• 제3권2호
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• pp.117-128
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• 2014

Processable conducting polyaniline derivative with free amine functional groups was successfully synthesized from the monomer o-phenylenediamine in aqueous hydrochloric acid medium using ammonium persulfate as an oxidative initiator. The synthesized poly(o-phenylenediamine) (PoPD) in critical condition was found to be completely soluble in common organic solvents like dimethyl sulfoxide, N,N-dimethyl formamide etc. From the intrinsic viscosity measurement, the optimum condition for the polymerization was established. The polymer was characterized by ultraviolet visible spectroscopy, Fourier transform infrared spectroscopy, proton magnetic resonance spectroscopy ($^1HNMR$) and thermogravimetric (TGA) analyses. The weight average molecular weights of the synthesized polymers were determined by the dynamic light scattering (DLS) method. From the spectroscopic analysis the structure was found to resemble that of polyaniline derivative with free amine functional groups attached to ortho/meta position in the phenyl ring. However, very little ladder unit was also present with in the polymer chain. The moderate thermal stability of the synthesized polymer could be found from the TGA analysis. The average DC conductivity of $2.8{\times}10^{-4}S/cm$ was observed for the synthesized polymer pellet after doping with hydrochloric acid.

• 한국ITS학회 논문지
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• 제6권3호
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• pp.165-173
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• 2007

본 논문에서는 최적의 설계 자동화를 위한 최소자원 할당 알고리듬을 제안한다. 제안된 할당 알고리듬은 연산자 간을 연결하는 신호선이 반복적으로 이용되어 연결 신호선 수가 최소가 될 수 있도록 기능 연산자를 할당한다. 레지스터 할당 시 연결구조에 따라 가중치를 갖는 구간 그래프를 구성한다. 최소의 클러스터 파티션 알고리듬을 이용하여 생성된 최대 크기의 클러스터들에 연결구조가 고려된 레지스터들을 할당한다. 또한 연결구조에 대한 멀티플렉서의 중복 입력을 제거하고 연산자에 연결된 멀티플렉서 간의 입력을 교환하는 입력 정렬 과정으로 연결 구조를 최소화한다. 또한, 벤치마크 실험을 통하여 제안된 알고리즘의 효용성을 보인다.

• 한국통신학회논문지
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• 제9권2호
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• pp.70-76
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• 1984

본 논문에서는 m개의 고장까지 극복할 수 있는 기능적 m-리던던트(Functional m-redundant)시스템을 그래프 이론에 바탕을 두고 정의하였다. 이 시스템은 리던던시를 효과적으로 이용하여 추가적인 테스트 기능없이 각 부시스템의 출력을 서로 비교함으로써 t(t$\geq$m)고장진단 가능하고 진단을 위한 시스템 정지가 필요없도록 설계되었다. 또한 이 시스템에 대한 진단 모델을 제시하였고 이 모델이 preparata의 진단 모델로 바뀌어질 수 있음을 보였으며 이를 이용하여 기능적 m-리던던트 시스템의 진단 특성을 Preparata에 의해 제시된 방법으로 해석하였다.

• 한국정보처리학회논문지
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• 제7권4호
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• pp.1255-1262
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• 2000

This paper proposes a hardware allocation and binding algorithm for ASIC Design. The proposed algorithm works on schedules input graph and simultaneously allocates and binds functional units, interconnections and registers by considering interdependency between operations and storage elements in each control step, in order to share registers and interconnections connected to functional units, as much as possible. Especially, he register allocation is executes the allocation optimal using graph coloring. This paper shows the effectiveness of the algorithm by comparing experiments to determine number of functional unit and register in advance or to separate executing allocation and binding of existing system.

• Bulletin of the Korean Chemical Society
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• 제14권6호
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• pp.732-739
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• 1993

Good yields were usually obtained in Pd(O)-catalyzed Suzuki aryl-aryl coupling reaction, even when both coupling partners had an ortho tertiary benzamide functional group. The direct ortho functionalization of oligomeric tertiary benzamides at Snieckus condition is dependent on the chain length. Tertiary benzamide 1 can be o,o-dilithiated only by metal-halogen exchange of the 2,6-dihalo-compound. Bis-tertiary benzamide 9 can be o,o'-dilithiated with excess(4.1 equivalents) s-butyllithium/TMEDA as the lithiating agent. Tris-tertiary benzamide 21 is hard to o,o"-difunctionalize due to steric interactions among the tertiary benzamide functional groups, and due to steric interactions between these functional groups and others (if present) on the termini of the terphenyl unit.

• 한국주거학회논문집
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• 제20권4호
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• pp.79-88
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• 2009

A planned access method on constantly-changing-community unit plan changes and develops based on the periodical situation and also plan theory. In this research, it is to present the link between the theory of complex city change and the plan factor of it, and to show how Korean residential complex plan has changed as time passed and how new concept of city plan came up and by applying new methods how can this affect our real world and the past plan. In the phase of analysis, it analyzed the flow of 'community unit plan' and its theory and investigated the factor of compositional space and built a analysis frame. The factors of community unit plan are space structure, size and shape of block, population, distribution of facilities and movement system. It chose the place that can represent the flow of community unit plan trand and that indicates the obvious development leading to Jamsil (1975), Gwa Chun (1980), Mok Dong (1983), Sang Ge (1985), Ilsan (1989), Dong tan (2001) and Eun Jung (2003) total of 7 places. And to compare a similar size of the city, it selected a small community unit. Based on the result of theoretical study and prior research, it can be said that the space composition style has change from a whole complete complex area to a linked-cross over community unit and the access of urban level was on set. Also, a pedestrian walking area was secured and the dense of building structure and pleasant environment wanting need was in balance. For facility plans, the usage of facility and functional change brought change of type, size and disposition. The walking area for pedestrian became a huge matter. Therefore, market, education, public facilities and green system collaborated to co-build a whole community unit and activated the walking environment. Also, public transportation, environment friendly city organization was built.