ATSUSHI YOSHIKAWA | Kanto Gakuin University (original) (raw)

Papers by ATSUSHI YOSHIKAWA

人工知能学会全国大会論文集 = Proceedings of the Annual Conference of JSAI, Jul 20, 1993

ICGA Journal, Dec 1, 1999

In April 1999, a \Special Issue Group on Game Informatics (SIG-GI)" was founded under the Informa... more In April 1999, a \Special Issue Group on Game Informatics (SIG-GI)" was founded under the Information Processing Society of Japan (IPSJ). At the start, there were some 160 members. Prof. dr. Yoshiyuki Kotani has been appointed chair, while the board of IPSJ-SIG-GI consists of dr. Hiroyuki Iida, dr. Atsushi Yoshikawa and dr. Hitoshi Matsubara. The IPSJ-SIG-GI aims at providing a forum for researchers in the area of games informatics, presenting new results on established or ongoing works. The recent success of several events on game-informatics, such a s the First International Conference on Computers and Games (CG'98), the IJCAI-97 Workshop on Computer Games, the Game Programming Workshop (annual series since 1994), the Advances in Computer Chess 9 (ACC9, now transformed into ACG9, every three year) and Boardgames in Academia (1995, 1997 and 1999) has encouraged the organizers to widen their scope and therefore IPSJ-SIG-GI was founded. We plan to have regular meetings, e.g., two t i m e s a y ear in the form of a small workshop. The next series of Computers and Games Conference (CG'2000) may b e organized under the aegis of IPSJ-SIG-GI. We w ould like t o i n vite contributors on all aspects of research related to game informatics. Relevant

Mathematical Problems in Engineering, Apr 13, 2022

Several studies have proposed that vote tampering based on heuristic algorithms can manipulate vo... more Several studies have proposed that vote tampering based on heuristic algorithms can manipulate voters' votes. It can be found from the analysis of the poll results of the 2016 US election that the frequency of "Trump won," which is generally considered a black swan phenomenon, is not low and even reached 16.8%. However, many models are unable to restore the generation of such a high frequency of black swan phenomena. In this study, the black swan phenomenon is successfully reproduced using a biasgenerating agent-based election system model. By adjusting the tampering method, the frequency of the black swan phenomenon will change from 5% to 15%. From the simulation results, it can be observed that one of the possible causes of the black swan phenomenon is the tampering of the voting results, which leads to more biased voters, thus increasing the frequency of the winning elections. is study proposes that to obtain more realistic simulation results, it is necessary to introduce more realistic perceptual models for agents, rather than relying solely on random functions. Allowing agents to make mistakes for a reason should be an integral part of multi-agent-based simulation in the field of pairwise human simulation.

IEICE Technical Report; IEICE Tech. Rep., Feb 23, 2009

IEICE Technical Report; IEICE Tech. Rep., Oct 15, 2016

IEICE Technical Report; IEICE Tech. Rep., Sep 17, 2016

IEICE Technical Report; IEICE Tech. Rep., Jun 7, 2014

Springer eBooks, 2013

Service management at commodity goods retailers requires various kinds of strategic knowledge. Th... more Service management at commodity goods retailers requires various kinds of strategic knowledge. This paper focuses on the (dis)advantages of mileage point and discount services. To uncover the characteristics of the two strategies, we are developing an agent-based simulator to analyze the behaviors of competing retailing stores and their customers. The retailer agents adaptively increase or decrease sales promotion of mileage point service and discounting based on their experiences and strategies to acquire customers. Customer agents, on the other hand, make a decision to choose one of the two retailers to repeatedly purchase daily commodities based on customer types and utilities. To explore the better strategies of retailers, we have conducted intensive simulation experiments. Our computational results have shown that the emergence of retailors’ cooperative behaviors and their stable relations strongly depends on to what extent the retailers decide the discounting rather than mileage point strategy at the very first stages.

Lecture notes in business information processing, 2014

We propose an improved method for employees to identify and rank images of desirable middle manag... more We propose an improved method for employees to identify and rank images of desirable middle managers at an organization. In many companies, despite many discussions of leader images, it is difficult to find differences between the images of each individual. So far, the literature on leaders has not answered these questions. Here we apply the persona technique to clarify these recognition differences. The persona technique came from the computer software user-interface design field and then spread to the product-development field. The proposed method works by (1) setting persona characters with various attributes, (2) assigning the attribute values with the orthogonal design technique, (3) designing questionnaires, (4) obtaining questionnaire results about personas from the subjects, and (5) evaluating the data recorded on respondent questionnaires. Using a large-scale Web survey, we found that the persona technique is superior to conventional questionnaires.

Information Systems, Apr 22, 2010

INTED2013 Proceedings, 2013

International Conference on Computers in Education, Dec 1, 2017

Artificial Intelligence, 2021

IEEE Conference Proceedings, 2016

SICE Journal of Control, Measurement, and System Integration, Nov 1, 2017

This paper presents a real time workers' behavior analyzing system using wearable sensors which c... more This paper presents a real time workers' behavior analyzing system using wearable sensors which combine Bluetooth low energy beacon (Beacon) and acceleration sensor to measure production progress and work history data in a cellular manufacturing system. It takes a lot of cost to collect those data on the cellular manufacturing line where workers' work is mainly conducted. For the purpose, we first built an experimental cellular manufacturing line and collected workers' behavioral data. Next, we developed our system and determined analyzing parameters using workers' behavioral data. Finally, we built another experimental cellular manufacturing line, and we measured production progress and work history data from our system. We then compared the result with a conventional visual method using video. The results revealed that our system measured the productivity data in the cellular manufacturing line which does not use a machine, and we could gather production progress and work history data more quickly than the conventional method. We believe that our system will make it possible to increase the efficiency of the supply chain system, to get a quick feedback in daily production, and to improve production.

2022 4th International Conference on Communications, Information System and Computer Engineering (CISCE), May 27, 2022

Informatics in Medicine Unlocked, 2022

Even in the midst of the Coronavirus 2019 (the covid-19) pandemic, schools continuously strive to... more Even in the midst of the Coronavirus 2019 (the covid-19) pandemic, schools continuously strive to provide consistent education to their students. Teachers and education policymakers are seeking ways to reopen schools, as it is necessary for community and economic development. However, in light of the pandemic, schools require customized schedules that can address the health concerns and safety of the students considering classroom sizes, air conditioning equipment, classroom systems, e.g., self-contained or departmentalized. To solve this issue, we developed the School-Virus-Infection-Simulator (SVIS) for teachers and education policymakers. SVIS simulates the spread of infection at a school considering the students' lesson schedules, classroom volume, air circulation rates in classrooms, and infectability of the students. Thus, teachers and education policymakers can simulate how their school schedules can impact current health concerns. We then demonstrate the impact of several school schedules in self-contained and departmentalized classrooms and evaluate them in terms of the maximum number of students infected simultaneously and the percentage of faceto-face lessons. The results show that increasing classroom ventilation rate is effective, however, the impact is not stable compared to customizing school schedules, in addition, school schedules can differently impact the maximum number of students infected simultaneously depending on whether classrooms are self-contained or departmentalized. It was found that one of school schedules had a higher maximum number of students infected simultaneously, compared to schedules with a higher percentage of face-to-face lessons. SVIS and the simulation results can help teachers and education policymakers plan school schedules appropriately in order to reduce the maximum number of students infected simultaneously, while also maintaining a certain percentage of face-to-face lessons. https://github.com/satoshi-takahashi-lab/school-virus-infection-simulator

IEICE Technical Report; IEICE Tech. Rep., Oct 10, 2020