Fukuoka Institute of Technology

Construction of signed distance functions through an elliptic equation

Motivated by recent advances in structural optimization, we propose a novel method for constructing the distance function to the boundary of a given domain. Building on and extending the celebrated Varadhan asymptotic theory, our approach reformulates the governing equation into...

Approximation in an Optimal Design Problem Governed by the Heat Equation

Abstract. This paper studies a two-material optimal design problem for the time-averaged duality pairing between a (possibly time-dependent) heat source and the weak solution of an initial-boundary value problem for the heat equation with a two-material diffusion coefficient, und...

Decomposing Vehicle Production and Consumption Impacts in Japan under Mobility and Production Network Interventions

Abstract Passenger vehicles contribute approximately 8% to global energy-related emissions and drive other environmental impacts through the extraction of raw materials. In this study, a hybrid LCA approach is used to investigate emissions and material life-cycle impacts arising...

Mapping changes in ecosystem wealth associated with cities expansion: the case of 9 Asian countries

Urban expansion is an important driver of environmental change, leading to land-cover conversion and changes in ecosystem wealth. While previous studies have assessed the national effects of urbanization on ecosystems, few have attributed these effects to specific cities based on...