Proceedings of the Conference of Transdisciplinary Federation of Science and Technology
11th TRAFST Conference
Displaying 1-50 of 64 articles from this issue
Program of the 11th TRAFST Conference
  • Takayuki Mizuno, Shohei Doi
    Session ID: A-4
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    Most interdisciplinary research has been limited to the fusion of two fields, such as physics and economics, statistics and political science, and etc. In contrast, fusion in the computational social science involves multiple fields. The social system has become more and more complex with globalization, and social issues can only be solved by tackling them in multiple fields. Using the example of economic security in an increasingly complex global shareholding network, we will show that it is difficult to solve social issues without the fusion of economics, political science, and information science. Furthermore, this paper shows the history of the fusion of political science, economics, and information science, and we will discuss how computational social sciences have a significant place in economic security.
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  • F. Toriumi
    Session ID: A-4
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    In 2019, COVID-19 began to spread in Wuhan, China, and became a pandemic that spread around the world. In the information society, various information is able to be diffused through social media. In such a situation, the diffusion of inappropriate information is called Infodemic, which has become a major social problem. In this paper, we investigate the diffusion of information on social media, which is a new information source in the modern information society. We have clarified how we shared and spread information under COVID-19. The results allowed us to capture shifts in topics of interest, which indicates that people may be losing interest in COVID-19 infection prevention information. We also found that “anger” emotions were often diffused on a large scale, which indicates that social anxiety may be increasing.
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  • H. Watanabe
    Session ID: B-1
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    The marketing had paradigm shifts from hunting type marketing made with purchasers to farming type marketing made with fans, and Philip Kotler named marketing 4.0. It became the important issue to manage the psychology loyalty of the customers for the marketing 4.0 era. This paper propose the method of structuralization and quantification of psychological loyalty, and connecting with each company’s measure.
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  • M. Tsubaki, Y. Suzuki
    Session ID: B-1
    Published: 2020
    Released on J-STAGE: December 17, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    Supplementary material
    On the basis of Marketing4.0 which is human-centered and will communicate with sustainable in-novation, it is important to propose and provide services which improve customer's quality of life and well-being by raising customer experience value from service. In this study, we clarify service elements influencing their well-being. However, the consumers whom services are given are not same type for well-being. Therefore, at first, we found 5 variables which connect the objective variable “life satisfaction” directly by using Bayesian network analysis. Then, we classify persons based on the 5 variables. Furthermore, according to types, we clarify service elements affect their well-being under the specific condition by Casual Mediation Analysis, and we lead useful knowledge about realizing service to improve the well-being.
    (Note: This paper was revised by the authors after the conference due to some errors of data and their descriptions. The erratum information and the original paper are posted as the “Supplementary materials.”)
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  • K. Takemura, H. Murakami
    Session ID: B-1
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    This presentation examines link between behavioral decision theoretic study of consumer decision process and consumer support. Behavioral decision theory is described briefly as the general term for descriptive theories to explain the psychological knowledge related to people’s decision-making behavior. It is called theory, but it is a combination of various psychological theories, for which no axiomatic systems such as those with which the utility theory widely used in economics have been established, but it is often limited to qualitative knowledge. In this presentation, implications of the findings of the behavioral decision theoretic study of consumer decision process on the consumer decision support and marketing are discussed.
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  • Approach with Bayesian Network
    T. Namatame, K. Otake, Y. Kato
    Session ID: B-1
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    Among various corporate marketing activities, the approach to customers is becoming more sophisticated year by year. In particular, the recommendation with purchases related data has become a common technology on EC sites as the Internet spreads. However, effective recommendations are not easy in EC because of the problems of basket dropping and cancellation. In this paper, we discuss a recommendation method that considers post-purchase cancellation using purchase-related data. A Bayesian network that can consider probabilistic causal relationships is used for this recommendation analysis.
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  • S. Hayashi
    Session ID: B-1
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    Professor Kazuo Hokkirigawa, Graduate School of Engineering, Tohoku University has created 181 innovations such as new product development with SMEs through industry-academia collaboration by January 29, 2020. The Sendai Hokkirigawa Model, the Fukushima Hokkirigawa Model, the Miyagi Osaki Hokkirigawa Model and the Kaminoyama Hokkirigawa Model have created 126 out of 181 innovations in collaboration with a support team centered on Professor Hokkirigawa and SMEs. This study analyzes the factors that the Hokkirigawa Model continues to create sustainable innovations.
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  • Yu Long, Koji Koyamada
    Session ID: B-5
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    The explanation model using the existing partial differential equation (PDE) is very important for utilizing big data obtained from various new phenomena such as new corona infection. The academic question in this research is “how can a partial differential equation be derived from given big data?” In this research, we clarify whether PDE can be derived more accurately than big data if we can construct an appropriate deep learning model that explains the given big data. If the neural network model is accurate enough, the chain rule can be used to compute the exact partial derivative term sampling, automatic differentiation was performed in the class called Gradient Tape of Tensor Flow, and the relationship between PDE derivation accuracy and partial differential term accuracy was clarified.
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  • K. Suzuki, N. Kato
    Session ID: C-1
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    While showing a scheme for trust and relief based on “Seven Viewpoints for Purpose Settings,” “Seven viewpoints with Seesaw Model,” and “Seven Viewpoints for Reliability and Safety Assurance,” this study proposes upstream management, difference of contamination and infection, setting guidelines/SOP for each activity and implementation/analysis from the perspective of PDCA aiming at both infection prevention and socioeconomic activities in the new normal state.
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  • From the Perspective of Prevention
    N. Kato, S. Oishi, K. Suzuki
    Session ID: C-1
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    Amid concerns over COVID-19, defects in social systems for prevention come to the surface, and the urgent renewal of the systems that will have an influence on trust and relief is required. This presentation proposes seven viewpoints of seesaw model(basic model) regarding occurrence prevention-detection-impact prevention (mitigation)-culture for safety, which is useful for making decision on how to make conflicting elements work well, from the viewpoint of East-West philosophical, ethical thought. Furthermore, the versatility of the model is demonstrated by showing that the COVID-19 seesaw model created based on the basic model leads to trust and relief in the New Normal.
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  • M. Itoh, Y. Yamani
    Session ID: C-1
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    The COVID-19 pandemic has significantly disrupted daily and professional activities. Uncertainties brought by the pandemic challenge successful management of risks in daily life. Amid of such uncertain situations, people may be “forced” to, establish a belief in and trust toward others and unfamiliar technologies which may not necessarily appear trustworthy, in order to avoid the burden and seek for relief from the uncertain circumstances. It is speculated that people may adapt to change their trust in technologies based on such forced use of the new technologies. The authors are currently investigating how peoples' trust toward technologies change as the COVID-19 pandemic becomes more controlled.
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  • S. Yokogawa, Y. Ishigaki, S. Endo, R. Takahara, Y. Kawauchi
    Session ID: C-1
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    We discuss risk assessment in free-address space where users are free to change desks and its layout on the floor, as the fields of the workplace and learning space in the “New Normal.” This talk presents the space risk assessment, risk prediction, and environmental control using environmental sensing data obtained by the environmental sensor network installed in the University of Electro-Communications Library. In addition, we introduce information visualization for users and their effects..
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  • M. Kiuchi, K. Nagai, K. Maruyama, Y. Watanabe, M. Munetika
    Session ID: C-2
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    Quality Function Deployment (QFD) is a methodology systematized by Dr. Shigeru Mizuno and Dr. Yoji Akao in 1978. In QFD, customer needs and expectations are first refined, and then refined information is reliably transferred into the product and service development process. With this, QFD can give some opportunities to improve the quality of products and services. Today, QFD is used by many companies and organizations in Japan and abroad, and QFD is a methodology that Japan is proud of, which has enabled it to provide products and services with high customer satisfaction.
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  • N. Ikoma
    Session ID: C-2
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    State space representation of dynamical system is widely used in prediction and control, etc., and state estimation is a fundamental problem to be solved in this formulation. While analytical state estimations via Kalman filter, etc., are available for systems consisting of linear equations and Gaussian distributions, there is no analytical solution to the state estimation problem for nonlinear and/or non-Gaussian state space models in general case. As a breakthrough to this issue, in early 1990s, a particle filter called “Monte Carlo Filter” has been proposed in Japan as the first universal approximation method of state estimation for nonlinear and/or non-Gaussian models by utilizing many realizations in the state space to represent probability distribution of posterior state. Due to the universal property and allowed flexibility in modeling, now, particle filters have become standard methods in many fields, such as natural science, social science, engineering, and so on.
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  • I. Hagiwara, L. Diago, H. Abe
    Session ID: C-3
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    Especially in the case of auto-driving level 3, causable machine learning has an important role. If the auto-driving car has the ability for risk prediction and danger avoidance based on causable machine Learning , it is very useful to support for elderly driver support. To realize this support .it will also be discussed how to get the car accident mathematical model from driving record.
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  • Investigation into the relation between driver states and safe takeovers
    S. Kitazaki
    Session ID: C-3
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    One of the expectations towards the automated driving technology is dramatic reduction of road crashes. The background hypothesis is that replacing the human driver by a computer will eliminate crashes that are currently caused by human errors. However, complication of the systems and new tasks imposed on the driver may generate new risks, system-induced problems. The main focus of human factors research in automated driving is to reduce the system-induced problems. The research project was conducted from FY2016 to FY2018 with the funding awarded by Cabinet Office and SIP-adus Phase 1. One of the three tasks of the project aimed at understanding effects of cognitive states of the driver on his/her takeover performance and extracting metrics of the influential driver states for driver monitoring systems. It was found that different driver states influenced takeover performance in different ways. Some metrics for the influencing states were identified. These findings are being discussed and applied to International Standards.
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  • H. Uchida
    Session ID: C-3
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    Energy optimal control (EOC) is applied to the case in that the hybrid electric vehicle performs position control. A virtual drive system driven by the position error signal is added to the model of the controlled object, and the power consumption is added to the evaluation function to derive the optimal control law. It is shown that good control is possible even when position control and energy allocation cannot be coordinated well with ordinary control.
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  • T. Imaseki, F. Sugasawa, K. Zao, Y. Mochizuki, H. Mouri
    Session ID: C-3
    Published: 2020
    Released on J-STAGE: November 21, 2020
    CONFERENCE PROCEEDINGS OPEN ACCESS
    Near-miss database consists of video data of real-world dangerous situations. It can be classified into the overt dangerous situation, which is obviously approaching accident, the potentially dangerous situation which has probability to get into the overt dangerous situation, and the normal driving situation. In order to assure safety driving of autonomous vehicle, it is necessary to evaluate whether the vehicle would be operated according to the scenarios which avoid not only the overt dangerous situations but also the potentially dangerous situations. In this paper, using technologies of object detection and measurement on the near-miss video data, and using theoretical concept of potential risk indicator, rear-end type near-miss data were analyzed, the potential risk indicators were calculated, and the potentially dangerous situations were defined. Then, a novel evaluation method of safer autonomous driving vehicles is proposed.
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