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Search Results: 1 - 10 of 484 matches for " Keun. "
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A Design of Incremental Granular Network for Software Data Modeling  [PDF]
Keun-Chang Kwak
Journal of Software Engineering and Applications (JSEA) , 2010, DOI: 10.4236/jsea.2010.311120
Abstract: In this paper, we propose an incremental method of Granular Networks (GN) to construct conceptual and computational platform of Granular Computing (GrC). The essence of this network is to describe the associations between information granules including fuzzy sets formed both in the input and output spaces. The context within which such relationships are being formed is established by the system developer. Here information granules are built using Context-driven Fuzzy Clustering (CFC). This clustering develops clusters by preserving the homogeneity of the clustered patterns associated with the input and output space. The experimental results on well-known software module of Medical Imaging System (MIS) revealed that the incremental granular network showed a good performance in comparison to other previous literature.
用于红外成象系统的紧凑型双活塞斯特林低温致冷器
Keun.,CS
红外 , 1997,
Abstract: Magnavox公司的光电子系统部为红外成象应用设计并压制了两台紧凑型双尖塞斯要低温致冷器的样机,即MX7050和MX7055。这两台样机的设计分别符合美国陆军为0.35W直线致冷器和0.6W标准先进杜瓦装置ⅢB直线致冷器制订的B2规范。
-sets and -continuous functions
Won Keun Min
International Journal of Mathematics and Mathematical Sciences , 2002, DOI: 10.1155/s0161171202109240
Abstract: We introduce a new class of sets, called γ-sets, and the notion of γ-continuity and investigate some properties and characterizations. In particular, γ-sets and γ-continuity are used to extend known results for semi-open sets and semi-continuity.
Generalized Baer rings
Tai Keun Kwak
International Journal of Mathematics and Mathematical Sciences , 2006, DOI: 10.1155/ijmms/2006/45837
Abstract: We investigate the question whether the p.q.-Baer center of a ring R can be extended to R. We give several counterexamples to this question and consider some conditions under which the answer may be affirmative. The concept of a generalized p.q.-Baer property which is a generalization of Baer property of a ring is also introduced.
Multiresolution Expansion and Approximation Order of Generalized Tempered Distributions
Byung Keun Sohn
International Journal of Mathematics and Mathematical Sciences , 2013, DOI: 10.1155/2013/190981
Abstract:
Effects of Corporate Social Responsibility on BtoB Relational Performance
Jong-Keun Kim
International Journal of Business and Management , 2011, DOI: 10.5539/ijbm.v6n2p24
Abstract: Recently, the influence of corporations has been increasing rapidly, and many types of stakeholders have become involved. Thus, the role of the corporate ability of stakeholder management has become more important in the overall performance of corporations. One of the most effective tools for managing various stakeholder groups is corporate social responsibility (CSR). Previous CSR studies have focused on how CSR activities influence relationships among corporations, customers, investors, and employees. The present study examines the effect of CSR on the relationship between corporations and their counterparts such as suppliers and partners, among others, which no study has explored. Thus, this study empirically examines the relationship between CSR activities and BtoB transaction performance. The results suggest that corporations with excellent CSR activities are likely to show better relationship performance in terms of satisfaction, relationship value, relationship commitment, dependence, cooperation, and communication.
Multiresolution Expansion and Approximation Order of Generalized Tempered Distributions
Byung Keun Sohn
International Journal of Mathematics and Mathematical Sciences , 2013, DOI: 10.1155/2013/190981
Abstract: Let be the generalized tempered distributions of -growth with restricted order , where the function grows faster than any linear functions as . We show the convergence of multiresolution expansions of in the test function space of . In addition, we show that the kernel of an integral operator provides approximation order in in the context of shift-invariant spaces. 1. Introduction Multiresolution analysis was shown to be very useful in extending the expansions in orthogonal wavelets from to a certain class of tempered distributions. Some interactions between wavelets and tempered distributions have been presented by Walter’s work in [1–3]. Walter has found the analytic representation of tempered distributions of polynomial growth with restricted order, , by wavelets [1] and the multiresolution expansions’ pointwise convergence of [3]. Pilipovi? and Teofanov have showed the uniform convergence on compact sets of the derivatives of multiresolution expansions of and the convergence of multiresolution expansions of in the test function space of . As an application, Pilipovi? and Teofanov have shown that the kernel of an integral operator provides approximation order in in the context of shift-invariant spaces [4]. In the meantime, the tempered distributions of polynomial growth were extended to tempered distributions of -growth, , in [5, 6] and -growth, , in [7, 8] or -growth, , in [9, 10], where the function grows faster than any linear functions as . We have considered the analytic representation of tempered distributions of -growth with restricted order, , by wavelets [11]. Also, we have shown that the multiresolution expansions of converges pointwise to the value of the distribution where it exists [12]. In this paper, we will show the uniform convergence on compact sets of the derivatives of multiresolution expansions of and convergence of multiresolution expansions of in the test function space of . In addition, we will show that the kernel of an integral operator provides approximation order in . This is an extension of the works of Pilipovi? and Teofanov [4] in the context of generalized tempered distributions, . 2. The Generalized Tempered Distribution Spaces Throughout this paper, we will use or to denote the positive constants, which are independent parameters and may be different at each occurrence. Let denote a continuous increasing function such that and . For , we define The function is an increasing, convex, and continuous function with and satisfies the fundamental convexity inequality . Further, we define for negative by means of the
Cauchy and Poisson Integral of the Convolutor in Beurling Ultradistributions of -Growth
Byung Keun Sohn
International Journal of Mathematics and Mathematical Sciences , 2014, DOI: 10.1155/2014/926790
Abstract: Let be a regular cone in and let be a tubular radial domain. Let be the convolutor in Beurling ultradistributions of -growth corresponding to . We define the Cauchy and Poisson integral of and show that the Cauchy integral of?? is analytic in and satisfies a growth property. We represent?? as the boundary value of a finite sum of suitable analytic functions in tubes by means of the Cauchy integral representation of . Also we show that the Poisson integral of corresponding to attains as boundary value in the distributional sense. 1. Introduction Let be a regular cone in and let denote its convex envelope. In [1] (or [2]) Carmichael defined the Cauchy and Poisson integrals for Schwartz distributions , , corresponding to tubular domain . Carmichael obtained the boundary values of these integrals in the distributional sense on the boundary of and found the relation between analytic functions with a specific growth condition in and the Cauchy and Poisson integrals of their distributional boundary values. In [3] Pilipovi? defined ultradistributions of -growth, where , , is a certain sequence of positive numbers, and studied the Cauchy and Poisson integrals for elements of in the case that the Cauchy and Poisson kernel functions are defined corresponding to the first quadrant ; , in . Pilipovi? showed that elements in are boundary values of suitable analytic functions with a certain -norm condition by means of the Cauchy integral representation and an analytic function with a certain -norm condition determines, as a boundary value, an element from . In [4] Carmichael et al. defined ultradistributions of Beurling type of -growth and of Roumieu type of -growth, both of which generalize the Schwartz distributions , and studied the Cauchy and Poisson integrals for elements of both and for corresponding to the arbitrary tubes where is an open connected cone in of which the quadrants are special cases. They showed that the Cauchy integral for elements of both and for corresponding to is shown to be analytic in , to satisfy a growth property and to obtain an ultradistribution boundary value, which leads to an analytic representation for the ultradistributions. They also showed that the Poisson integrals for elements of both and for corresponding to are shown to have an ultradistribution boundary value. We can find the works of the Cauchy and Poisson integrals for ultradistributions of compact support in [5] and for various kinds of distributions in [2]. In the meantime, Betancor et al. [6] introduced the spaces of Beurling ultradistributions of -growth, , of which
Tests on Alkali-Activated Slag Foamed Concrete with Various Water-Binder Ratios and Substitution Levels of Fly Ash  [PDF]
Keun-Hyeok Yang, Kyung-Ho Lee
Journal of Building Construction and Planning Research (JBCPR) , 2013, DOI: 10.4236/jbcpr.2013.11002
Abstract: To provide basic data for the reasonable mixing design of the alkali-activated (AA) foamed concrete as a thermal insulation material for a floor heating system, 9 concrete mixes with a targeted dry density less than 400 kg/m3 were tested. Ground granulated blast-furnace slag (GGBS) as a source material was activated by the following two types of alkali activators: 10% Ca(OH)2 and 4% Mg(NO3)2, and 2.5% Ca(OH)2 and 6.5% Na2SiO3. The main test parameters were water-to-binder (W/B) ratio and the substitution level (RFA) of fly ash (FA) for GGBS. Test results revealed that the dry density of AA GGBS foamed concrete was independent of the W/B ratio an RFA, whereas the compressive strength increased with the decrease in W/B ratio and with the increase in RFA up to 15%, beyond which it decreased. With the increase in the W/B ratio, the amount of macro capillaries and artificial air pores increased, which resulted in the decrease of compressive strength. The magnitude of the environmental loads of the AA GGBS foamed concrete is independent of the W/B ratio and RFA. The largest reduction percentage was found in the photochemical oxidation potential, being more than 99%. The reduction percentage was 87% - 93% for the global warming potential, 81% - 84% for abiotic depletion, 79% - 84% for acidification potential, 77% - 85% for eutrophication potential, and 73% - 83% for human toxicity potential. Ultimately, this study proved that the developed AA GGBS foamed concrete has a considerable promise as a sustainable construction material for nonstructural element.
Effect of Autologus Platelet-Rich Plasma on IL-6, MMP-3 and MCP-1 Expression in Synoviocytes from Osteoarthritic Patients Knees  [PDF]
Chang Ich Hur, Cheol Park, Hanlou Li, Jong Keun Seon, Hyun Keun Kim, Taek Rim Yoon, Eun-Kyoo Song
Open Journal of Regenerative Medicine (OJRM) , 2014, DOI: 10.4236/ojrm.2014.33008
Abstract: Nowadays, some studies reported promising results of platelet-rich plasma (PRP) for the treatment of osteoarthritis (OA). However, the effects of PRP on prevention of osteoarthritis in knee joints have been debated. The present study investigated the effects of PRP on osteoarthritis related inflammatory cytokines expressed in fibroblast-like synoviocytes (FLS) from osteoarthritic knees. The synovial tissues were harvested from eight osteoarthritic patients who had undertaken total knee arthroplasties (TKAs) and cultured in DMEM containing 10% FBS. Platelet-rich plasma releasate (PRPr) was made by clotting or activation of PRP by citrate. The levels of PDGF-AA and VEGF in PRPr and whole blood were measured with ELISA method. The FLS were isolated and cultured from osteoarthritic knees. The IL-1β stimulated FLS were cultivated with three different conditions (none, 1% and 10% of PRP). To determine the expression of IL-6, MMP-3, and MCP-1, we used reverse transcriptase polymerase chain reaction (RT-PCR). The concentrations of platelet count in PRP were about 7 to 9 times higher than those of whole blood. The levels of PDGF-AA in PRPr were approximately 3 to 4 times higher than those of whole blood. The levels of VEGF in PRPr were also significantly 7 to 18 times higher than those of whole blood. Without induction of the FLS with IL-1β, 1% or 10% PRPr did not reduce expressions of inflammatory proteins (MMP-3, MCP-1), except for IL-6. However, with induction of the FLS with IL-1β, both concentrations (1% and 10%) of PRPr reduced significantly all inflammatory protein expressions (IL-6, MMP-3, MCP-1). PRPr diminished inflammatory IL-1β-mediated effects on human osteoarthritic fibroblast-like synoviocytes. These results suggest that platelet-rich plasma can be a good therapeutic option for the treatment of osteoarthritis.
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