• 대한수학회보
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• 제41권3호
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• pp.435-450
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• 2004

We show that two concepts of h-stability and h-stability in variation for nonlinear difference systems are equivalent by using the concept of $n_{\infty}$-summable similarity of their associated variational systems. Also, we study h-stability for perturbed non-linear system y(n+1) =f(n,y(n)) + g(n,y(n), Sy(n)) of nonlinear difference system x(n+1) =f(n,x(n)) using the comparison principle and extended discrete Bihari-type inequality.

• 호남수학학술지
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• 제46권2호
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• pp.313-334
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• 2024

In the current study, our aim is to define new generalized extended beta and hypergeometric types of functions. Next, we methodically determine several integral representations, Mellin transforms, summation formulas, and recurrence relations. Moreover, we provide log-convexity, Turán type inequality for the generalized extended beta function and differentiation formulas, transformation formulas, differential and difference relations for the generalized extended hypergeometric type functions. Also, we additionally suggest a generating function. Further, we provide the generalized extended beta distribution by making use of the generalized extended beta function as an application to statistics and obtaining variance, coefficient of variation, moment generating function, characteristic function, cumulative distribution function, and cumulative distribution function's complement.

• 한국경제지리학회지
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• 제26권4호
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• pp.359-374
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• 2023

본 연구의 목적은 마오쩌둥 이후 중국 지역 발전 정책의 진화와 공간 불균등과의 관계를 분석하고자 하는 것이다. 이를 위해 본 논문은 1인당 GRDP 변동계수와 지니계수를 적용하여 중국 31개 시·성·자치구 간 지역 경제력 격차와 지역 발전 정책과의 관계를 분석하였다. 중국의 지역 간 경제력 격차는 1979년 이후 심화되었다가 제10차 5개년 계획(2001~2005년) 이후 중부, 서부, 동북부 지역의 지속적인 정부 주도의 대규모 경제성장 정책에 따라 완화되는 것으로 분석되었다. 그러나 이는 31개 시·성·자치구 전체를 대상으로 분석한 결과이며, 동부, 중부, 서부, 동북부 4대 지역을 대상으로 GDP 변동계수를 각각 분석했을 때 상이한 결과가 나타났다. 예를 들어, 제10차 5개년 계획 이후 중부 지역 내 격차는 지속적으로 심화되었지만 서부와 동북부의 지역 내 경제력 격차는 지속적으로 완화되었다. 이는 중국의 지역 간 경제력 격차를 완화시키는데 큰 역할을 한 것으로 분석되었다. 특히 동부 지역 내 격차는 제12차 5개년 규획(2010~2015년) 이후에도 지속적으로 심화되어 중국 지역 경제력의 수렴 현상이 둔화되는 결과를 가져왔다. 이는 제11차 5개년 규획(2006~2010년) 시기에 본격적으로 시행되었던 중부 권역 발전 정책의 한계에 기인한 것으로 볼 수 있다.

• 대한수학회지
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• 제41권4호
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• pp.647-665
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• 2004

The existence of solutions for the nonlinear functional differential equation with nonlocal conditions governed by the variational inequality is studied. The regularity and a variation of solutions of the equation are also given.

• 보건행정학회지
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• 제30권1호
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• pp.37-49
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• 2020

Background: Unmet healthcare needs have many advantages for measuring inequalities in healthcare use. However, the existing indicator is difficult to capture the reality of unmet healthcare needs sufficiently and is not quite appropriate in comparing regional inequality. The purpose of this study is to critically analyze the utilization of the unmet healthcare need indicator for regional healthcare inequalities research. Methods: We used the level of healthcare accessibility and healthcare need to categorize the regions that are known to cause differences in healthcare utilization between regions and verified how existing unmet healthcare need indicator is distributed at the regional level. Results: Four types of regions were classified according to the high and low levels of healthcare needs and accessibility. The hypothesis about the regional type expected to have the highest unmet healthcare need was not proved. The hypothesis about the lowest expected regional type was proved, but the difference in the average rate of unmet healthcare needs among regional types was not significant. The standard deviation of the rate of unmet healthcare needs among regions within the same type was also higher than the overall regional variation, which also disproved the whole frame of hypothesis. Conclusion: Failure to prove the hypothesis means the gap between the supposed meaning of the indicator and the reality. In order to understand the current state of healthcare utilization of people in various regions of Korea and to resolve inequality, fundamental research on the in-depth structure and mechanisms of healthcare utilization is needed.

• The Journal of Asian Finance, Economics and Business
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• 제7권12호
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• pp.593-604
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• 2020

This study analyzes human development convergence and the impact of funds transfer to the regions using σ and β-convergence analysis method. Observations were made in all Indonesia's provinces in the period 2010-2019. The coefficient of variation calculation shows a dispersion in the inequality of human development, which means that convergence occurred. This is also documented by the clustering analysis results developed in the study. The results are in line with the hypothesis of neoclassical theory, which shows the tendency for provinces with lower human development levels to grow relatively faster. The dynamic panel data approach with the GMM model shows that a model built with explanatory variables for transfer of funds to regions may lead to the process of convergence of human development - 2.21% per year or 31 years to cover the half-life of convergence. This is a consequence of the Special Allocation Fund and the Village Fund, which positively impact the convergence process, and the General Allocation Fund and the Revenue Sharing Fund with negative signs slowing the convergence process. This evidence opens opportunities to review the justification of the weighting component in determining the amount of funds transferred to the region to accelerate the convergence process of human development.

• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제1권3호
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• pp.195-200
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• 2012

카메라의 시선을 조정하기 위해서는 비전 시스템의 시스템 파라미터를 사용해야 한다. 하지만 이러한 시스템 파라미터는 측정 당시와 사용중이 달라 질 수 있다. 이 경우 원하는 카메라의 시선 조정이 이루어지기 어렵다. 이 문제를 보완하기 위한 방법으로서 본 연구에서는 LMI(Linear Matrix Inequality)에 기반한 비전 시스템의 시스템 파라미터의 변화에 강건한 시선 고정 방법을 제안한다. 시뮬레이션 검증 결과는 제안하는 방법이 기존의 선형 알고리즘에 비해 더 적은 시선 추적 에러를 보이고, 기존의 비선형 알고리즘에 비해 더 안정적인 시선 추적 에러를 보인다. 또한 제안하는 방법은 속도가 빨라서 실시간 사용이 가능하다.

• 보건교육건강증진학회지
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• 제32권3호
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• pp.23-31
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• 2015

Objectives: The contribution of health behavior is high in the mortality variation. Mortality variation can be decreased through the policies and programs for improving health behavior. We investigated that health behaviors effected with standardized mortality in community. Methods: We examined the distribution of health determinant factors and correlation analyzed between factors and performed multiple linear regression. Data were collected from 2012 Community Health Survey in 253 communities, annual regional statistics, and statistics from Statistics Korea. Results: This study defined that the variation of standardized mortality and there are exist inequality level of health determinant factors in 253 communities. This study showed that the higher standardized mortality explained through health behavior factors of the current smoking rate, walking exercise rate and diagnosis of hypertension or diabetes rate after adjusted other factors(adjusted $R^2=0.709$, p<0.001). Conclusions: Smoking, walking exercise and diagnosis chronic disease affecting on the regional variation of standardized mortality. These factors can be improved by the local residents themselves.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -1
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• pp.519-522
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• 2002

An active phased array antenna consists of many channels. Each channel has a different initial phase shift and gain because of the inequality in the active circuits themselves, interface between radiators and active circuits, and beam-forming circuits and other antenna system configurations. This raises an inherent problem in active phased array antennas. To compensate for this problem the initial phase and gain of each channel should be calibrated. This paper presents an efficient calibration method for an initial phase variation of each channel in active phased array antennas. We tested our method in an active phased array antenna, and obtained good results in the radiation pattern and beam direction of antenna.

• Journal of applied mathematics & informatics
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• 제27권1_2호
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• pp.431-440
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• 2009

In this paper, we introduce and consider a new system of relaxed cocoercive variational inequalities involving three different operators and the concept of projective nonexpansive mapping. Base on the projection technique, we suggest two kinds of new iterative methods for the approximate solvability of this system. The results presented in this paper extend and improve the main results of [S.S. Chang, H.W.J. Lee, C.K. Chan, Generalized system for relaxed co coercive variational inequalities in Hilbert spaces, Appl. Math. Lett. 20 (2007) 329-334] and [Z. Huang, M. Aslam Noor, An explicit projection method for a system of nonlinear variational inequalities with different ($\gamma,r$)-cocoercive mappings, Appl. Math. Comput. (2007), doi:10.1016/j.amc.2007.01.032].