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Journal of Technology and Social Science (JTSS, J. Tech. Soc. Sci.) An international open-access peer-reviewed journal ISSN 2432-5686
Home > Archives > Vol.10, No.1 Vol.10, No.1
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Articles
A Survey on Physically Unclonable Function: its Basics and Current Progress Kentaroh Katoh, Toru Nakura, and Haruo Kobayashi Journal of Technology and Social Science, Vol.10, No.1, pp.1-16, 2026. Abstract: PUF is an important hardware security device that can be used for authentication and encryption key generation. PUFs, also known as device fingerprints, can generate random digital values that can be regenerated using physical quantities that are correlated with manufacturing variations. PUF can be used to prevent the distribution of counterfeit products, to authenticate IoT devices at low cost, and to realize more secure communication technologies. In the academic field, numerous PUFs utilizing different physical properties influenced by manufacturing variations have been proposed. This paper briefly surveys PUFs that have been proposed in the academic field. In this survey, the PUFs are categorized into seven categories. Some of the current research works of each category are introduced after the explanation of the basic working principle of the typical PUFs in each category.
Numerical Analysis for Damping Responses of Automotive Rear Seat Structure with Leather Sheet Using FEM Described by Biot Type Poroelastic Material Model Chihiro Kamio, Takao Yamaguchi, Masashi Fujimoto, Koki Yamaguchi, and Shinichi Maruyama Journal of Technology and Social Science, Vol.10, No.1, pp.17-27, 2026. Abstract: This report describes damping response analysis of the rear seat structure for automobiles by experiment and FEM proposed by Yamaguchi. For the rear seats, there exist steel panels backside of seat foams, while there are metal frames instead of steel panels for front seats, which we reported previously. The seat structure is modeled by three -dimensional finite element using Biot type porous material. Both resin skeleton and internal air are able to propagate waves in the Biot type material (i.e. poroelastic material). The models of using analysis are a steel panel without porous material, a steel panel with a porous material, a steel panel with a porous material and a leather sheet. Using them, damping responses and dynamic deformations are verified by the experiment. And effects of leather sheets on the responses are investigated.
Research on Microgrid Energy Management Strategy and Multi-Objective Optimization Yan Chen, Seiji Hashimoto, and Xiyang Qian Journal of Technology and Social Science, Vol.10, No.1, pp.28-39, 2026. Abstract: With the rapid development of distributed energy resources and the increasing requirements for energy utilization efficiency, microgrids, as key carriers for integrating various distributed energy sources and achieving efficient energy management, have become a research hotspot in terms of their stable operation and optimal control. This paper focuses on microgrid energy management strategies and multi-objective optimization algorithms, and conducts an in-depth analysis of the hierarchical control architecture of microgrids, including the functions and coordination mechanisms of the power scheduling layer, local control layer, and communication control layer. By comparing the Multi-Objective Genetic Algorithm (MOGA), Multi-Objective Simulated Annealing Algorithm (MOSA), and Multi-Objective Particle Swarm Optimization (MOPSO) algorithm, the applicability of MOPSO in microgrid multi-objective optimization is verified. A power model including photovoltaic, wind, diesel generator, and battery energy storage system is constructed, and an optimal scheduling model aiming at minimizing power generation cost, equipment cost, and environmental pollution cost is designed. Energy optimization management is realized based on the improved MOPSO algorithm. The proposed strategy can effectively improve the operational efficiency, economy, and environmental protection of the microgrid, providing theoretical and technical support for the practical application of microgrids.
Damping Response Analysis of T-shaped Structure Containing New Acoustic Black Hole with Residual Thickness Supported by a Nonlinear Concentrated Spring Koki Yamaguchi, Takao Yamaguchi, Koki Mitsumata, Chihiro Kamio, and Shinichi Maruyama Journal of Technology and Social Science, Vol.10, No.1, pp.40-49, 2026. Abstract: We proposed a lightweight, highly vibration damping structure using a new acoustic black hole that solves problems of weakness in strength. Rather than plate thickness, the acoustic black hole function was used for the height of ribs in T-shaped structures. Nonlinear vibration analysis using finite element method with Model Strain Energy Method were carried out for T-shaped steel structures supported by a nonlinear concentrated spring under impact load. The T-shaped steel is composed of steel layer having an gacoustic black holeh with residual thickness. A viscoelastic damping layer is covered on the acoustic black hole. We calculated modal loss factors and nonlinear transient responses. We clarified effects of an gacoustic black holeh with residual thickness and nonlinear springs on the nonlinear damped responses.
Numerical Computation of Urethane Foamfs Nonlinear Compression Response through Microstructural Deformation Analysis Tetsuya Ozaki, Takao Yamaguchi, Masuo Kawakami, and Chihiro Kamio Journal of Technology and Social Science, Vol.10, No.1, pp.50-60, 2026. Abstract: When compressed, urethane foam exhibits a soften-hardening behavior in terms of its resilience. Notably, when compressed up to 33%, the stiffness of the foam significantly decreases. To investigate the underlying mechanism of this resilience behavior under compression, a microstructural model was employed. The microcellular structure of the urethane was modeled using a Kelvin cell geometry and implemented as a finite element model. Numerical deformation analysis of the Kelvin cell model was conducted using LS-Dyna, a nonlinear finite element method code. The study revealed that the softening mechanism in the foamfs resilience arises from the geometric nonlinearity of the resin skeleton constituting the Kelvin cell structure.
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