• Bulletin of the Korean Space Science Society
• /
• 1996.11a
• /
• pp.29-29
• /
• 1996

No Abstract, See Full Text

• Communications of the Korean Mathematical Society
• /
• v.15 no.2
• /
• pp.339-348
• /
• 2000

We introduce the notion of the Finsler metrics compat-ible with a special Riemannian structure f of type (1,1) satisfying f6+f2=0 and investigate the properties of Finsler space with them.

• Communications of the Korean Mathematical Society
• /
• v.15 no.2
• /
• pp.331-338
• /
• 2000

In the present paper, we investigate a problem in a sym-metric Finsler space, which is a special space. First we prove that if a symmetric space remains to be a symmetric one under the Z-projective change, then the space is of zero curvature. Further we will study W-recurrent space and D-recurrent space under the pro-jective change.

• Proceedings of the KSRS Conference
• /
• v.1
• /
• pp.155-155
• /
• 2006

• Environmental and Resource Economics Review
• /
• v.28 no.3
• /
• pp.415-435
• /
• 2019

The purpose of this study is to analyze the returns to scale by estimating the bigeye tuna production function of Korean distant longline fisheries in WCFPC waters. In the analysis, number of crews, vessel tonnage, number of hooks, and bigeye tuna biomass are used as input variables and the catch amount of bigeye tuna is used as an output variable in the Cobb-Douglas production function. Prior to the function estimation, the biomass of bigeye tuna was estimated by the Bayesian state-space model. Results showed that the fixed effect model was selected based on the hausman test, and vessel tonnage, hooks, and biomass would have direct effects on the catch amount. In addition, it was shown that the bigeye tuna distant longline fisheries in WCFPC water would have increasing returns to scale.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2015.10a
• /
• pp.360-363
• /
• 2015

In n-dimensional spatial data, Minimum Boundary Rectangle(MBR) was used to handle the moving object trajectories data. But, this method has inaccurate approximation. So, It makes many dead space and performs unnecessary operation when processing a query. In this paper, we offer new index structure using approximation. We developed algorithm that make index strucutre by using Douglas-Peucker Algorithm and had a comparison experiment.

• The Bulletin of The Korean Astronomical Society
• /
• v.34 no.2
• /
• pp.78.2-78.2
• /
• 2009

• Proceedings of the Korea Contents Association Conference
• /
• 2013.05a
• /
• pp.85-86
• /
• 2013

이 연구는 더글라스 서크(Douglas Sirk) 감독의 <천국이 허락한 모든 것> (1955)과 이용주 감독의 <건축학 개론>(2012)에서 집에 대한 '재현' 공간을 고찰하였다. 두 멜로드라마 장르 영화는 등장인물들이 대사로 직접 표현한 수 없는 것들을 가구, 소품 등의 미장센, 특히 리모델링을 하는 집을 통해서 보여준다. 집은 욕망을 스타일과 형식을 통해 산출한다는 점에서 멜로드라마 장르의 공간을 특징짓는 서술적 사건과 모티프를 담고 있는 구체적 장소의 역할을 한다. 이러한 맥락에서 이 연구는 멜로드라마 장르에서 집과 풍경들이 어떻게 영화적 공간(cinematic space)을 구성하고 그 재현공간이 갖는 사회적인 의미를 고찰한다.

• East Asian mathematical journal
• /
• v.27 no.5
• /
• pp.545-555
• /
• 2011

Based on the A-maximal(m)-relaxed monotonicity frameworks, the approximation solvability of a general class of variational inclusion problems using the relaxed proximal point algorithm is explored, while generalizing most of the investigations, especially of Xu (2002) on strong convergence of modified version of the relaxed proximal point algorithm, Eckstein and Bertsekas (1992) on weak convergence using the relaxed proximal point algorithm to the context of the Douglas-Rachford splitting method, and Rockafellar (1976) on weak as well as strong convergence results on proximal point algorithms in real Hilbert space settings. Furthermore, the main result has been applied to the context of the H-maximal monotonicity frameworks for solving a general class of variational inclusion problems. It seems the obtained results can be used to generalize the Yosida approximation that, in turn, can be applied to first- order evolution inclusions, and can also be applied to Douglas-Rachford splitting methods for finding the zero of the sum of two A-maximal (m)-relaxed monotone mappings.

• Honam Mathematical Journal
• /
• v.45 no.3
• /
• pp.491-502
• /
• 2023

As a generalization of Berwald spaces, we have the ideas of Douglas spaces and Landsberg spaces. S. Bacso defined a weakly-Berwald space as another generalization of Berwald spaces. In 1972, Matsumoto proposed the (α, β) metric, which is a Finsler metric derived from a Riemannian metric α and a differential 1-form β. In this paper, we investigated an important class of (α, β)-metrics of the form $F={\mu}_1\alpha+{\mu}_2\beta+{\mu}_3\frac{\beta^2}{\alpha}$, which is recognized as a special form of the first approximate Matsumoto metric on an n-dimensional manifold, and we obtain the criteria for such metrics to be weakly-Berwald metrics. A Finsler space with a special (α, β)-metric is a weakly Berwald space if and only if B^m_m is a 1-form. We have shown that under certain geometric and algebraic circumstances, it transforms into a weakly Berwald space.