• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 한국경영과학회 2001년도 추계학술대회 논문집
• /
• pp.350-353
• /
• 2001

As different service classifications for existing and new business data services, it is hard to gather necessary data for the service providers to set their strategies and regulations are also applied asymmetrically to each service provider. Therefore an appropriate market classification is required for the business data services. The Hendry model is selected in this paper to analyze substitution degree among services and then Hendry model is applied to competition among four business data services. As a result, it is shown that these services compete directly and future market shares of services are forecasted and positioning strategy for new services is considered.

• Industrial Engineering and Management Systems
• /
• 제6권1호
• /
• pp.49-54
• /
• 2007

This study deals with technology planning-based management for Basic R&D Programs of government supported research institutes (GRIs). The Korean Research Council for Industrial Science and Technology which consists of major GRIs needs to implement new government policies which focus on the dissemination of R&D outcome, collaborative research, and performance-oriented R&D investment. The major characteristics of technology planning-based management include the hierarchy of market-oriented technology plans and the valuation of core technologies. We also suggest technology classifications and project network diagrams.

• Bulletin of the Korean Mathematical Society
• /
• 제52권3호
• /
• pp.717-734
• /
• 2015

In this paper, we provide a classification of arithmetic functions in terms of identically-free-distributedness, determined by a fixed prime. We show then such classifications are free from the choice of primes. In particular, we obtain that the algebra $A_p$ of equivalence classes under the quotient on A by the identically-free-distributedness is isomorphic to an algebra $\mathbb{C}^2$, having its multiplication $({\bullet});(t_1,t_2){\bullet}(s_1,s_2)=(t_1s_1,t_1s_2+t_2s_1)$.

• Bulletin of the Korean Mathematical Society
• /
• 제51권3호
• /
• pp.823-829
• /
• 2014

Ruled submanifolds in Euclidean space satisfying some algebraic equations concerning the Laplace operator related to the isometric immersion and Gauss map are studied. Cylinders over a finite type curve or generalized helicoids are characterized with such algebraic equations.

• Bulletin of the Korean Mathematical Society
• /
• 제50권4호
• /
• pp.1345-1356
• /
• 2013

In this paper, we study rotational and helicoidal surfaces in Euclidean 3-space in terms of their Gauss map. We obtain a complete classification of these type of surfaces whose Gauss maps G satisfy $L_1G=f(G+C)$ for some constant vector $C{\in}\mathbb{E}^3$ and smooth function $f$, where $L_1$ denotes the Cheng-Yau operator.

• Journal of the Korean Institute of Intelligent Systems
• /
• 제16권3호
• /
• pp.338-348
• /
• 2006

We classify the 3-classes In the semigroup M$_5$(F) of all 5$\times$5 Boolean matrices over F=(0,1).

• Communications for Statistical Applications and Methods
• /
• 제16권5호
• /
• pp.881-889
• /
• 2009

Support vector machines(SVMs) are known as flexible and efficient classifier of multivariate observations, producing a hyperplane or hyperdimensional curved surface in multidimensional feature space that best separates training samples by known groups. As various methodological extensions are made for SVM classifiers in recent years, it becomes more difficult to understand the constructed model intuitively. The aim of this paper is to visualize various SVM classifications tuned by several parameters in reduced dimensions, so that data analysts secure the tangible image of the products that the machine made.

• Journal of applied mathematics & informatics
• /
• 제19권1_2호
• /
• pp.57-75
• /
• 2005

Quasigroups are algebraic structures closely related to Latin squares which have many different applications. There are several classifications of quasigroups based on their algebraic properties. In this paper we propose another classification based on the properties of strings obtained by specific quasigroup transformations. More precisely, in our research we identified some quasigroup transformations which can be applied to arbitrary strings to produce pseudo random sequences. We performed tests for randomness of the obtained pseudo-random sequences by random walks on torus. The randomness tests provided an empirical classification of quasigroups.

• Proceedings of the Korean Society of Community Living Science Conference
• /
• 한국지역사회생활과학회 2011년도 추계학술대회
• /
• pp.79-79
• /
• 2011

• Proceedings of the Korean Society of Community Living Science Conference
• /
• 한국지역사회생활과학회 2011년도 추계학술대회
• /
• pp.88-88
• /
• 2011