• Korean Public Administration Review
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• v.48 no.3
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• pp.437-461
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• 2014

최근 재정건전성에 관한 논의가 확산되면서 비과세·감면제도는 유용성 관점에서 근본적인 변화를 요구받고 있다. 그럼에도 불구하고 정부는 경기부양 등 지역경제 활성화 도모차원에서 비과세·감면제도를 지속적으로 활용하고 있다. 이에 본 연구는 비과세·감면의 경제적 효과에 관한 분석의 필요성을 제기하며, 이를 위해 강원도 18개 시·군을 대상으로 지방세 비과세·감면이 지역경제에 어떠한 영향을 미치고 있는지에 관해 패널분석(PCSE)을 수행하였다. 패널분석 결과, 비과세·감면, 비과세, 감면 등이 지역경제에 미치는 영향은 다양하게 나타난다. 시 단위 지방자치단체의 경우 비과세·감면 규모가 증가될수록 지역경제에 정(+) 영향을 미치고 있다. 반면 군 단위 지방자치단체의 경우 변수 간 통계적으로 유의미하지 않아 비과세·감면정책이 지역경제를 활성화할 것이라는 정부의 주장은 다소 설득력이 낮다. 시 단위 지방자치단체의 경우 감면총액과 감면(조세특례제한법, 감면조례)규모가 증가될수록 지역경제에 정(+)의 영향을 미치지만, 지방세법 상 감면규모가 증가될수록 지역경제에 부(-)의 영향을 미치고 있다. 한편 군의 경우 지방세법 상감면규모가 증가될수록 지역경제에 정(+)의 영향을 미치지만, 감면조례에 근거한 감면규모가 증가될수록 지역경제에 부(-)의 영향을 미치고 있다. 분석결과에 근거한 정책적 함의는 다음과 같다. 정부는 지역경제 활성화를 위해 비과세·감면을 시행하면서 지방세수확충을 위해 또 다른 재정보전을 하고 있으나 지역경제에 미치는 영향이 그리 크지 않고 명확하지 않다. 따라서 비과세·감면의 규모를 줄이고 세수 확충을 통한 재정지출을 고려해야 한다. 특히 시 단위 지방자치단체의 경우 지방세법상 감면제도를 정비할 필요가 있고, 군 단위 지방자치단체의 경우 감면조례에 근거한 감면제도를 정비할 필요가 있다.

• Journal of the Society of Naval Architects of Korea
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• v.43 no.5 s.149
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• pp.550-559
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• 2006

A design procedure for a ship with minimum total resistance was developed using a numerical optimization method called SQP(Sequential Quadratic Programming) and a CFD technique based on the Rankine source panel method with the nonlinear free surface boundary conditions. During the whole optimization process the geometry of the hull shape was represented based on the NURBS(Non-uniform rational B-spline) technique and the modification of the hull shape was controlled using the Bell-shaped distribution function to keep the fairness of the hull shape before and after the hull modification. The numerical analysis was carried out using 4000TEU container ship in the towing tank facility installed in the Pusan national university to know the validity of the developed algorithm for this study. As the results of the numerical analysis it proved that the resistance of the optimized hull is conspicuously reduced in comparison with the original hull in a wave-making resistance point of view.

• Journal of the Society of Naval Architects of Korea
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• v.41 no.5
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• pp.14-20
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• 2004

The aim of this paper is to analyze the steady performance of POD-type waterjet system by panel method. A surface panel method is applied to the present analysis. To analyze the compound propulsor. analysis program has been developed based on a perturbation potential method. The developed code has been validated by comparing the experimental data of shrouded propeller. The validated code has been applied to the POD-type waterjet system which can be used for the propulsion of amphibious vehicle. The computed results have been compared with experimental results. which shows a good agreement between them.

• Journal of the Society of Naval Architects of Korea
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• v.36 no.4
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• pp.1-8
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• 1999

Numerical study is carried out to investigate flow characteristics around an axisymmetric body with and without an integrated propulsor. The incompressible Reynolds-Averaged Navier-Stokes(RANS) equations are also solved using the finite volume method and the standard $k-\varepsilon$ turbulence model for turbulence closure. In order to investigate the propulsor-hull interaction, the induced velocity calculated by surface panel methods is utilized for the boundary condition at the propeller plane. The calculated results are compared to the experimental results. It is considered that the present numerical code can be used for design of an integrated propulsor.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2003.05a
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• pp.37-42
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• 2003

Fundamental Study for optimizing ship hull form using SQP(sequential quadratic programming) method in a resistance point of view is presented. The Wigley hull is used as an initial hull and numerical calculations are carried out according to various froude numbers. To obtain the ship resistance the wave resistance is evaluated by a Rankine source panel method with nonlinear free surface conditions and the ITTC 1957 friction line is used to predict the frictional resistance coefficient. The geometry of a hull surface is represented and modified by B-spline surface patch. The displacement and the waterplane transverse 2nd moment of inertia of the hull is fixed during the optimization process. And the shp design program called EzHULL is used to draw the lines of the optimized hull form to perform the model test.

• Journal of the Society of Naval Architects of Korea
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• v.42 no.2 s.140
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• pp.113-123
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• 2005

A higher order panel method based on B-spline representation for both the geometry and the solution is developed for the analysis of steady flow around marine propellers. The self-influence functions due to the normal dipole and the source are desingularized through the quadratic transformation, and then shown to be evaluated using conventional numerical quadrature. By selecting a proper order for numerical quadrature, the accuracy of the present method can be increased to the machine limit. The far- and near-field influences are shown to be evaluated based on the same far-field approximation, but the near-field solution requires subdividing the panels into smaller subpanels continuously, which can be effectively implemented due to the B-spline representation of the geometry. A null pressure jump Kutta condition at the trailing edge is found to be effective in stabilizing the solution process and in predicting the correct solution. Numerical experiments indicate that the present method is robust and predicts the pressure distribution on the blade surface, including very close to the tip and trailing edge regions, with far fewer panels than existing low order panel methods.

• Informatization Policy
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• v.18 no.4
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• pp.42-58
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• 2011

This paper starts from one question: what are the key factors of the web accessibility policy, which is significant for realizing equity in the web and enhancing human dignity in the information society. To find significant factors for complying with web accessibility, this paper analyzes panel data of 16 Korean local governments (for five years: 2004-2009) according to the research design which is based on the demand and supply balance model and consists of four variables : 'legal and institutional environment (including legal infrastructure)', 'financial foundation (fiscal self-reliance ratio)', 'policy inputs (amount of imformatization budget, employee of information experts)'and 'policy demand (internet usage rate, the number of disabled people and elderly people)'. From the results of this study, this paper can explain the mechanism and impact factors on the web accessibility policy of Korean local governments. Some factors are critical to improve web accessibility: (1) the importance of policy demand, (2) the importance of policy inputs, (3) the importance of legal and institutional environment. Finally, this paper concludes with some suggestions to enhance the web accessibility capacity for Korean local governments: (1) improve awareness on web accessibility, (2) develop a standard and invest R&D on web accessibility, (3) foster experts in web accessibility.

• The Korean Journal of Applied Statistics
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• v.34 no.5
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• pp.697-710
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• 2021

Relative error prediction is preferred over ordinary prediction methods when relative/percentile errors are regarded as important, especially in econometrics, software engineering and government official statistics. The relative error prediction techniques have been developed in linear/nonlinear regression, nonparametric regression using kernel regression smoother, and stationary time series models. However, random effect models have not been used in relative error prediction. The purpose of this article is to extend relative error prediction to some of generalized linear mixed model (GLMM) with panel data, which is the random effect models based on gamma, lognormal, or inverse gaussian distribution. For better understanding, the real auto insurance data is used to predict the claim size, and the best predictor and the best relative error predictor are comparatively illustrated.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2004.05a
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• pp.167-171
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• 2004

The Spar platform with deep draft is characterized as effective structure in extreme wave condition, which has larger natural period than that of waves in sea. In this paper, the time simulation of motion responses of Spar with catenary mooring line is presented in irregular waves. The memory effect is modeled by added mass at infinite frequency and convolution integrals in terms of wave damping coefficients. The added mass, wave damping coefficients and wave exciting forces are obtained from three-dimensional panel method in the frequency domain. The motion equations are consisted of forces for inetia, memory effect, hydrostatic restoring, wave exciting and mooring line. The forces of mooring line are modeled as quasi-static catenary cable.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2000.04a
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• pp.7-12
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• 2000

As the offshore oil fields are moved to the deep ocean, the oil production systems of FPSO(Floating production storage and offloading system) are building these days and so it is the most important to estimate the drift motion and damping effects the drift motion importantly. The components of damping consist of viscous, wave radiation effect and wave drift damping. It is need to estimate the wave drift damping exactly among them. The wave drift damping means the change rate of mean wave drift force with respect to the ship and ocean structures speed. In order to calculate this, the 3-Dimensional panel method used to translating and pulsating Green function is adopted. The calculation is carried out for series 60(CB = 0.7) vessel and the results are compared with other theoretical ones.