• STI Policy Review
• /
• 제7권1호
• /
• pp.87-109
• /
• 2016

Public procurement for innovation (PPI) is a new approach in stimulating innovation, and currently attracts considerable attention from policymakers and academics. This paper discusses the rationales and perspectives of PPI in Vietnam. The rationales for public procurement for innovation policy in Vietnam compared to theoretical and international practice are discussed. From such a comparison, the paper concludes that R&D results-procurement policy in Vietnam shall be understood and implemented as regular PPI both theoretically and practically. However while designing the policy, policymakers must consider the characteristics of the STI system of the country in order to make the policy adaptable to context. The paper identifies that PPI in Vietnam can be implemented with a ready legal framework (intellectual property rights, R&D contracts, standardization, etc.), the prepared capabilities of R&D institutions, businesses, and public agencies in innovation processes, and the provision of a demand-supply network and other procurement incentives.

• 대한전자공학회논문지
• /
• 제27권6호
• /
• pp.851-860
• /
• 1990

This paper presents a recognition method which interprets 3-D object in terms of several silhouettes of quadtree and octree. Object representation used in object matching should be invariant with respect to locatin and orientation of the object. Generalized octree is projected on to image plane along the principal axes. Regular octree is made from orthogonal directions, but generalized octree is independent to viewing directions. Recognition process is achieved in two-stage matching. The quadtrees and octrees of unknown object with minimum dissimilarities are matched with the quadtrees and octrees of the models. So as to verify efficiency of 3-D object representation and accuracy of object recognition, experiments are performed for 14 different type of geometrical models and its results have been shown.

• 한국해양공학회:학술대회논문집
• /
• 한국해양공학회 2006년 창립20주년기념 정기학술대회 및 국제워크샵
• /
• pp.453-456
• /
• 2006

To examine the effect of shape and crest width variation of a permeable submerged breakwater on the wave energy dissipation, Two-Dimensional numerical model with Large Eddy Simulation, which is able to simulate directly WAve Structure Seabed interaction (hereafter, LES-WASS-2D) has been newly developed. A good agreement has been obtained by the comparison between the existing experimental results and LES-WASS-2D model's results for the permeable submerged breakwater. Moreover, based on the LES-WASS-2D model, the wave energy dissipation due to a permeable submerged breakwater are discussed for regular and irregular waves with relation to its crest width and shape.

• 대한수학회보
• /
• 제55권5호
• /
• pp.1463-1481
• /
• 2018

Let $X=\{X_t\}_{t{\geq}0}$ be a $L{\acute{e}}vy$ process in ${\mathbb{R}}^d$ and ${\Omega}$ be an open subset of ${\mathbb{R}}^d$ with finite Lebesgue measure. The quantity $H_{\Omega}(t)={\int_{\Omega}}{\mathbb{P}}^x(X_t{\in}{\Omega})$ dx is called the heat content. In this article we consider its generalized version $H^{\mu}_g(t)={\int_{\mathbb{R}^d}}{\mathbb{E}^xg(X_t){\mu}(dx)$, where g is a bounded function and ${\mu}$ a finite Borel measure. We study its asymptotic behaviour at zero for various classes of $L{\acute{e}}vy$ processes.

• Journal of the Optical Society of Korea
• /
• 제20권3호
• /
• pp.363-367
• /
• 2016

In this paper, we present a resolution-enhanced computational integral imaging reconstruction method by using boundary folding mirrors. In the proposed method, to improve the resolution of the computationally reconstructed 3D images, the direct and reflected light information of the 3D objects through a lenslet array with boundary folding mirrors is recorded as a combined elemental image array. Then, the ray tracing method is employed to synthesize the regular elemental image array by using a combined elemental image array. From the experimental results, we can verify that the proposed method can improve the visual quality of the computationally reconstructed 3D images.

• 지구물리
• /
• 제7권4호
• /
• pp.247-253
• /
• 2004

3차원 형상화를 통한 분석이 많은 분야에서 연구 및 적용되고 있다. 3차원 형상화는 사진영상의 중첩에서 (3차원)레이저 스캐닝(laser scanning)으로 발전을 하여 가고 있으며, 각 방법이 각기 그 자체로서 발전을 해가고 있는 추세이다. 본 연구에서는 물체에 대한 데이터베이스를 구축하여 대상 이미지에 대하여 기하학적 패턴 매칭(patter matching)을 기반으로 한 인지(인식) 알고리즘을 도입하여 3차원 형상화를 통한 지질 및 지반조사를 위한 기초 기술로 활용하고자 하였다. 물체의 외형적인 성질에 기반하며 특별한 광원없이 물체를 인지할 수 있는 3차원 형상화 알고리즘은 지질 및 지반조사 분야 외에서도 많은 도움이 될 것이다.

• Journal of the Korean Society for Industrial and Applied Mathematics
• /
• 제25권4호
• /
• pp.173-195
• /
• 2021

A new implicit discontinuous Galerkin spectral element method (DGSEM) based on the first order hyperbolic system(FOHS) is presented for solving elliptic type partial different equations, such as the Poisson problems. By utilizing the idea of hyperbolic formulation of Nishikawa[1], the original Poisson equation was reformulated in the first-order hyperbolic system. Such hyperbolic system is solved implicitly by the collocation type DGSEM. The steady state solution in pseudo-time, which is the solution of the original Poisson problem, was obtained by the implicit solution of the global linear system. The optimal polynomial orders of 𝒪(𝒽^𝑝+1)) are obtained for both the solution and gradient variables from the test cases in 1D and 2D regular grids. Spectral accuracy of the solution and gradient variables are confirmed from all test cases of using the uniform grids in 2D.

• 대한통합의학회지
• /
• 제11권3호
• /
• pp.99-114
• /
• 2023

Purpose : The purpose of this study was to determine factors that affect the quality of life (QoL) of people with diabetes. We hope to provide a basis for intervention strategies for health promotion and related research among patients with diabetes in the field of physical therapy. Methods : We selected individuals diagnosed with diabetes who were aged 19 years or higher by using data from the 2019 Korean Health Panel survey and analyzed the results of 1,527 people. The influencing factors were sex, age, household income, marital status, age, education level, subjective health status, body mass index (BMI), smoking, drinking, regular exercise, experience of depression and anxiety, suicidal thoughts, stress, and frequency of walking (days/week). Frequency analysis, descriptive statistics, independent sample t-test, one-way analysis of variance, and multiple regression analysis were performed. Results : The EQ-5D score for QoL was .87 ± .12, with pain and discomfort being the most detrimental to the QoL of people with diabetes. In terms of patients characteristics, the QoL was lower among participants who were female, older, and separated/widowed/divorced; had an education level below middle school; had a poor subjective health status; were non-smokers and drinkers; and did not walk and exercise regularly, experienced a lot of stress, and experienced depression and anxiety; and had suicidal thoughts (p<.001). Being separated/bereaved/divorced; experiencing a lot of stress, depression, and anxiety; and having suicidal thoughts were negatively associated with QoL in people with diabetes (p<.01). On the other hand, age of 65 years or younger; graduation from high school, fair or better subjective health, regular exercise and alcohol consumption, and walking (days/week) were positively associated with QoL (p<.05). Conclusion : Regarding the QoL of patients with diabetes, intervention strategies should be formulated by considering general characteristics and disease-related characteristics. Among the various factors affecting QoL, the number of walking and regular exercise were found to be the factors that improved the QoL of patients with diabetes. These results can be used as a basis for the education and management of patients with diabetes in the field of physical therapy.

• 제어로봇시스템학회논문지
• /
• 제15권11호
• /
• pp.1080-1087
• /
• 2009

This paper presents an algorithm to acquire 3D geometric information using a virtual plane method. The method to measure 3D information on the plane is easy, because it's not concerning value on the z-axis. A plane can be made by arbitrary three points in the 3D space, so the algorithm is able to make a number of virtual planes from feature points on the target object. In this case, these geometric relations between the origin of each virtual plane and the origin of the target object coordinates should be expressed as known homogeneous matrices. To include this idea, the algorithm could induce simple matrix formula which is only concerning unknown geometric relation between the origin of target object and the origin of camera coordinates. Therefore, it's more fast and simple than other methods. For achieving the proposed method, a regular pin-hole camera model and a perspective projection matrix which is defined by a geometric relation between each coordinate system is used. In the final part of this paper, we demonstrate the techniques for a variety of applications, including measurements in industrial parts and known patches images.

• 디지털콘텐츠학회 논문지
• /
• 제13권3호
• /
• pp.263-269
• /
• 2012

캐릭터의 그룹핑은 3D 게임에서 매우 효과적으로 게임을 즐길 수 있게 한다. 본 논문에서는 객체 특징 벡터를 이용하여 3D 게임 캐릭터를 속성에 따라 그룹핑하는 방법을 제시한다. 게임에서 움직임이 거의 없는 캐릭터(NMT)의 경우 외부가 직선에 의한 단순한 형태로 나타난다. 그러나 움직임이 많은 캐릭터(MT)는 그것과 구분된다. 이러한 특징을 가버 필터를 이용하여 추출하고 K-NN으로 그룹핑한다. 실험을 통하여 각 속성을 사용해서 그룹핑한 경우 80%를 상회하는 정확도를 얻었다. 제안한 방법은 게임 진행에서 유사한 속성을 가진 캐릭터들이 효과적으로 그룹핑되어 전략적이고 속도감 있게 플레이 할 수 있는 기능을 제공한다.