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Affiliation |
Graduate School of Engineering Science Department of Systems Design Engineering Civil and Environmental Engineering Course |
KOGURE Yosuke
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Research Interests 【 display / non-display 】
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bifurcation
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spatial economics
Graduating School 【 display / non-display 】
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2017.04-2022.03
Tohoku University Graduate School of Engineering Department of Civil and Environmental Engineering Graduated
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2015.04-2017.03
Tohoku University Department of Civil Engineering and Architecture Graduated
Degree 【 display / non-display 】
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Tohoku University - Doctor (Engineering)
Campus Career 【 display / non-display 】
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2024.04-Now
Akita University Graduate School of Engineering Science Department of Systems Design Engineering Civil and Environmental Engineering Course Assistant Professor
External Career 【 display / non-display 】
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2024.04
Akita University Assistant Professor
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2022.04-2024.03
Yachiyo Engineering Co.,Ltd Research Institute for Infrastructure Paradigm Shift Researcher
Research Areas 【 display / non-display 】
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Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Civil engineering plan and transportation engineering
Thesis for a degree 【 display / non-display 】
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Group-theoretic Bifurcation Mechanisms for Economic Agglomerations on a Square Lattice
Yosuke Kogure
2022.03
Single author
Research Achievements 【 display / non-display 】
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BIFURCATION ANALYSIS OF MONOCENTRIC AGGLOMERATION ON A LONG NARROW ECONOMY
AIZAWA Hiroki, IKEDA Kiyohiro, KOGURE Yosuke, OSAWA Minoru, GASPAR José Maria
Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) ( Japan Society of Civil Engineers ) 76 ( 4 ) 282 - 298 2020 [Refereed]
Research paper (journal)
In new economic geography, economic agglomeration is known to be governed by bifurcation. However, the majority of theoretical researches focuses on two-place economy and racetrack economy and abstract from geographical advantage which are pervasive in the real world. In this paper, we focus on a long narrow economy, in which discrete locations are equally spread over a line segment. By group-theoretic bifurcation theory, we elucidate the bifurcation mechanism of monocentric city on this economy analytically. Emergence of satellite cities around a primary city is shown to be exist. By numerical analysis of Forslid & Ottaviano model with replicator dynamics, we show that the higher the expenditure share of manufactured goods is or the lower the elasticity of substitution is, the farther from the monocentric city satellite cities emerge.
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A STUDY OF GEOMETRICALLY STABLE PATTERNS ON A SQUARE LATTICE ECONOMY
KOGURE Yosuke, ONDA Mikihisa, OSAWA Minoru, TAKAYAMA Yuki, IKEDA Kiyohiro
Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) ( Japan Society of Civil Engineers ) 74 ( 4 ) 411 - 425 2018 [Refereed]
Research paper (journal)
In the analysis of many-region spatial agglomeration models, it is practically impossible to find all stable equilibria because the governing equations exhibit complex bifurcation behaviour in line with changes in the level of transport cost. In this paper, a systematic method for finding “trivial solutions," a special class of equilibria, is introduced. Trivial solutions satisfy the governing equation for any values of the transport cost parameter while retaining their geographical patterns. Trivial solutions can be systematically computed and classified by analysing the group that expresses the symmetry of the governing equations. As a specific example, the trivial solutions on a square lattice economy with boundary is explicitly given. Stability properties of the trivial solutions are studied through numerical experiments employing Forslid and Ottaviano (2003)'s model.
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AN ENHANCEMENT OF GROUP-THEORETIC SPECTRUM ANALYSIS FOR DETECTING SPATIAL AGGLOMERATION
ONDA Mikihisa, MURAKAMI Daisuke, IKEDA Kiyohiro, TAKAYAMA Yuki, OSAWA Minoru, KOGURE Yosuke
Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) ( Japan Society of Civil Engineers ) 74 ( 4 ) 398 - 410 2018 [Refereed]
Research paper (journal)
Central place theory<sup>1)</sup> envisaged that economic agglomerations form regular hexagonal patterns. A long-standing issue is a lack of quantitative method for assessing emergence of such regularities in the actual data. Ikeda et al.<sup>2)</sup> introduced a group-theoretic spectrum analysis as the first attempt to develop a quantitative approach to detect hexagonal patterns. However, there has been several technical issues to be settled in their method: (i) How to select domain that crucially affect the result? (ii) How to select predominant spectrum? To settle these issues, we employ several methodologies: an optimization formulation for the choice of a domain, an eigenvector-based criterion for noise reduction, and a permutation test for a significance test of spectrum. The effectiveness of the proposed method is demonstrated by an analysis of the actual population data of Southern Germany and Eastern USA.
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GROUP-THEORETIC SPECTRUM ANALYSIS OF CITY DISTRIBUTION
ONDA Mikihisa, KOGURE Yosuke, IKEDA Kiyohiro, TAKAYAMA Yuki, OSAWA Minoru
Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) ( Japan Society of Civil Engineers ) 73 ( 3 ) 148 - 164 2017 [Refereed]
Research paper (journal)
In economic geography, central place theory<sup>1)</sup> envisaged the emergence of hexagonal distribution of cities from uniformity. However, rigorous verification of the existence of hexagonal patterns is missing over years. To support this theory, Ikeda et al.<sup>2)</sup> introduced a group-theoretic Fourier spectrum analysis in a regular-triangular lattice and detected hexagonal patterns of cities in Southern Germany and Eastern USA. However, the existence of geometrical patterns other than hexagons remains unknown. This paper, considering square patterns, introduced a square lattice version of a group-theoretic Fourier spectrum analysis. Using this analysis in Southern Germany, we indicated a possibility of the square lattice as candidate of a spatial platform in a population distribution analysis.