• The Journal of Korean Institute of Communications and Information Sciences
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• v.39A no.10
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• pp.619-621
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• 2014

In this letter, an MMSE based continuous turbo equalizer is proposed for MIMO-HARQ systems. In the proposed scheme, the soft information from the reception process for the previous transmission is reutilized at the initialization of the reception process for the next transmission to enhance the decoding convergence speed. Simulation results verify that the proposed scheme achieves an improved BLER with a significantly accelerated decoding convergence speed.

• ETRI Journal
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• v.33 no.5
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• pp.810-813
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• 2011

We report the use of a widely tunable detuned dual-mode laser diode (DML) as a compact and portable continuous-wave THz emitter. The wavelength difference between the two lasing modes of this DML can be tuned from 2.4 nm to 9.3 nm by using integrated microheaters. The power difference between these modes is less than 1 dB, and the side-mode suppression ratio is greater than 30 dB over the entire tuning range.

• Nonlinear Functional Analysis and Applications
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• v.27 no.1
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• pp.121-140
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• 2022

In this paper, we study the strong convergence of new methods for solving classical variational inequalities problems involving semistrictly quasimonotone and Lipschitz-continuous operators in a real Hilbert space. Three proposed methods are based on Tseng's extragradient method and use a simple self-adaptive step size rule that is independent of the Lipschitz constant. The step size rule is built around two techniques: the monotone and the non-monotone step size rule. We establish strong convergence theorems for the proposed methods that do not require any additional projections or knowledge of an involved operator's Lipschitz constant. Finally, we present some numerical experiments that demonstrate the efficiency and advantages of the proposed methods.

• The Pure and Applied Mathematics
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• v.9 no.1
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• pp.39-45
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• 2002

In this paper, we study the space of almost continuous functions with the topology of uniform convergence. And we investigate some properties of this space.

• Journal of the Korea Convergence Society
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• v.9 no.12
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• pp.195-205
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• 2018

The purpose of this study was to investigate the effects of perceived risk, perceived benefits and trust on the intention of continuous use of Internet primary banks in order to explore ways for stable establishment and growth of Internet primary banks. In addition, the mediating effects of trust on the relationships among perceived benefits, perceived risk and intention of continuous use were tested. Through an online survey, 457 people aged 20-59 years who had experience of using an Internet primary bank within the last 3 months were selected as the subjects for this study. First, perceived benefits, perceived risk, and trust were found to have a significant influence on the intention of continuous use of Internet primary banks. Second, the partial mediation effect of trust on the relationships of ease of use and functional risk with intention of continuous use was confirmed, and the full mediation effect of trust on the relationships of attractiveness and innovativeness with intention of continuous use was verified. In order to achieve sustainable growth, Internet primary banks are required to increase major benefits of customers and lower the risk levels to build firm customer trust.

• The Journal of the Convergence on Culture Technology
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• v.4 no.4
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• pp.173-180
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• 2018

In order to find how their learning satisfaction to impact on continuous learning, this study analyzed 206 participants who are learners under the literacy education from Ulsan city. With the first results, when looking over their learning satisfaction, we found that the level of satisfaction was the highest at the educational environment following teacher quality, learning results and contents sequentially. In general characteristics, the longer is learning attending and the satisfier is education contents and learning satisfaction. With the second results, when we look over how the general characteristics of literacy learners to impact on continuous learning, those who are over 70 years old expressed the higher rate on continuous learning. With the third results, considering the correlation between learning satisfaction and continuous learning, we concluded that the first was education contents, the second was teacher quality, the third was learning results and the last was learning environment. Consequently, we found that for literacy learners, the older and longer attending and the higher satisfaction, in addition, the continuous learning was higher according to needs of everyday life and the education contents impacted on continuous learning.

• Journal of the Korean Mathematical Society
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• v.52 no.1
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• pp.43-65
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• 2015

We present a new convergence analysis of popular Broyden's method in the Banach/Hilbert space setting which is applicable to non-smooth operators. Moreover, we do not assume a priori solvability of the equation under consideration. Nevertheless, without these simplifying assumptions our convergence theorem implies existence of a solution and superlinear convergence of Broyden's iterations. To demonstrate practical merits of Broyden's method, we use it for numerical solution of three nontrivial infinite-dimensional problems.

• Journal of the Institute of Convergence Signal Processing
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• v.11 no.3
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• pp.183-188
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• 2010

In this paper we propose a detection method of the medial axis of the continuous stripes on the LoG scale-space. Our method detects the medial axis of continuous stripes iteratively by varying the scale of LoG operator. Small-scale LoG operator detects two +/- pole pairs centered on the edge positions of stripe by the zero-crossing detection. The more increase the scale of LoG scale-space, the more close two poles to the medial axis of stripe. The medial axis of continuous stripe is the position where two poles is overlapped. The proposed method detected robustly the medial axis of continuous stripes stronger than the thinning methods used to binary image.

• International Journal of Industrial Entomology and Biomaterials
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• v.48 no.2
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• pp.67-77
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• 2024

This study aims to assess the efficacies of exogenous enzymes, derived from invertebrate gut-associated microbes, as feed additives, in reducing volatile organic compound (VOC) emissions using an in vitro pig intestine continuous fermentation system. An in vitro continuous fermentation model was used to simulate a comparable bionic digestion system by co-reacting feed, enzymatic additives (arazyme, mannanase, and xylanase, derived from the gut bacteria of Nephila clavata, Eisenia fetida, and Moechotypa diphysis, respectively), and gastrointestinal microbes, followed by an analysis of their correlations. A significant correlation was observed between exogenous enzyme supplementation and reduced VOC emissions in the fecal phase of continuous fermentation (p < 0.05). The concentration of VOCs decreased by 3.75 and 2.75 ppm in the treatment group following arazyme and multi-enzyme supplementation, respectively, compared to that in the control group (7.83 ppm). In addition, supplementation with arazyme and multiple enzymes significantly affected the microbial composition of each fermentation phase (p < 0.05). In particular, Lactiplantibacillus pentosus and Pediococcus pentosaceus, which changed in abundance according to arazyme or multi-enzyme supplementation, exhibited a positive relationship with VOC emissions. These results suggest that exogenous enzymes derived from invertebrate gut-associated bacteria can be efficiently applied as feed additives, leading to a reduction in VOC emissions.

• Journal of the Korean Mathematical Society
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• v.58 no.1
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• pp.1-28
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• 2021

We study a continuous data assimilation algorithm for the three-dimensional simplified Bardina model utilizing measurements of only two components of the velocity field. Under suitable conditions on the relaxation (nudging) parameter and the spatial mesh resolution, we obtain an asymptotic in time estimate of the difference between the approximating solution and the unknown reference solution corresponding to the measurements, in an appropriate norm, which shows exponential convergence up to zero.