{"title":"Time-series Clustering of Global Automakers Stock Prices","authors":"Y. Shirota, Akane Murakami","doi":"10.52731/iee.v7.i2.626","DOIUrl":"https://doi.org/10.52731/iee.v7.i2.626","url":null,"abstract":"In the paper, we describe the stock price data analysis using the hierarchical clustering method named Hierarchical Risk Parity. In the financial engineering, clustering is important for the portfolio development. The data we used are the top 100 global industries' stock prices from 2018 to 2019. The industry field is automobile manufacturing. The countries of the industries are Japan, US and Germany. We analyzed sequentially a bi-month data for the two years. Then we found that when the stock price drastically decreased, there could clearly appear country-based clusters. In the global turmoil period by the US-China trade friction in 2018, we could identify that the Japan cluster and the US cluster appeared with clear boundaries. To verify the hypothesis, we traced the time series changes of the clusters through the two years. As a result, we proved the hypothesis was correct, as far as the period was what we used. In addition, we visualized the resultant country-based clusters of the largest damage period, as a stock price fluctuation plot and the Markowitz’s risk-return plot, to see the difference of the three countries’ trend.","PeriodicalId":416504,"journal":{"name":"Information Engineering Express","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121965031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mobile Carrier Change Intention Analysis Based on IT Service Management Platform","authors":"K. Nishimatsu, A. Inoue, M. Iwashita","doi":"10.52731/iee.v9.i1.707","DOIUrl":"https://doi.org/10.52731/iee.v9.i1.707","url":null,"abstract":"The purpose of this study is to understand the user intention to continue or change mobile carriers, considering the current mobile phone market in Japan. The market was mainly shared by three Major Mobile-Carriers (3MMC): docomo, au, and SoftBank. However, the number of Mobile Virtual Network Operators (MVNOs) customers has been increasing recently, and Rakuten Mobile has entered the mobile phone market as a Mobile Network Operator (MNO). Currently, the mobile phone market is highly competitive and there is little difference in mobile phone services offered by various carriers. Under such competitive conditions, mobile carriers need an appropriate method to develop service strategies to maintain or increase their market share. To understand users’ mobile carrier change intention, we classified each carrier’s users into two user segments based on continuous or change intention and analyzed the differences between the segments. We showed that the user segmentation model can extract information about the differences in characteristics of two user segments from their decision-making factors and user attributes with respect to mobile services. Understanding these differences is important as carriers consider when and what strategies to implement in order to maintain or increase market share.","PeriodicalId":416504,"journal":{"name":"Information Engineering Express","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128209363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Improving User Experience of C Programming Language Learning System for Beginners in Error Correction Learning","authors":"S. Matsumoto, Shuichi Yamagishi, Kosuke Kaida","doi":"10.52731/iee.v8.i1.527","DOIUrl":"https://doi.org/10.52731/iee.v8.i1.527","url":null,"abstract":"","PeriodicalId":416504,"journal":{"name":"Information Engineering Express","volume":"334 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122095997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Importance of Research Collaboration for a Post-doctoral Researcher","authors":"A. Ohata, Mika Konuma, Yuuji Mizukami","doi":"10.52731/iee.v8.i1.671","DOIUrl":"https://doi.org/10.52731/iee.v8.i1.671","url":null,"abstract":"","PeriodicalId":416504,"journal":{"name":"Information Engineering Express","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124575965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Attitude Change in Older Adults Fallen for a Special Fraud","authors":"Eriko Musashi, Takaaki Hosoda","doi":"10.52731/iee.v7.i2.609","DOIUrl":"https://doi.org/10.52731/iee.v7.i2.609","url":null,"abstract":"Cases of special fraud in Japan have been increasing and have become one of the serious social issues in recent years. Special fraud is a general term referring to crimes that are related to obtaining money with various methods, for example, convincing a victim to transfer his/her money to unknown persons and fraudulently using a cash card via telephone or other communication methods. Many people have become victims of special fraud, although there are many organizations, financial institutions, the police departments, etc., actively warning the public and providing information about this type of crime. We examined how older adults become victims of special fraud. Therefore, in this paper, we analyzed the attitude change in victims through the use of actual examples. Then, we identified which kinds of decision-making processes can prevent older adults becoming victims of special fraud.","PeriodicalId":416504,"journal":{"name":"Information Engineering Express","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127475101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development and evaluation of remote articulation test system to support collaboration between special education classes and external experts","authors":"Ikuyo Masuda-Katsuse, Yuiko Hirashima","doi":"10.52731/iee.v8.i1.627","DOIUrl":"https://doi.org/10.52731/iee.v8.i1.627","url":null,"abstract":"","PeriodicalId":416504,"journal":{"name":"Information Engineering Express","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115010177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hiroki Tanioka, Rina Yano, Kenji Matsuura, M. Sano, T. Ueta
{"title":"Quantitative Measurement and Analysis to Computational Thinking for Elementary Schools in Japan","authors":"Hiroki Tanioka, Rina Yano, Kenji Matsuura, M. Sano, T. Ueta","doi":"10.52731/iee.v8.i1.658","DOIUrl":"https://doi.org/10.52731/iee.v8.i1.658","url":null,"abstract":"In Japan, programming education has been made compulsory in elementary schools since 2020. The Programming Education Guide (GPE) explains the purpose of programming education and the abilities that can be fostered through programming education. In addition, the “Portal Site for Programming Education Focusing on Elementary Schools” introduces various examples of programming education. However, there is little information measuring whether programming classes are effective in improving OTWP (Objective Thinking as a Way of Programming) abilities based on CT (Computational Thinking), except for reports of improvement after simple statistical analysis. Therefore, we prepared 30 CT questions, 12 basic and 18 applied, for the CT test considering four key techniques, decomposition, pattern recognition, abstraction, and algorithms, of which 14 questions were pre-test and seven questions were assessment test. In the experiment, 18 elementary school students from grades 1st to 6th were given a short workshop only once, and the analysis of the effect was done statistically, considering their habituation to the problems. The results of the experiment showed that there was no effect of the one-time workshop, unlike other reports of improvement that used simple statistical methods. It became clear that the CT ability was not improved by the short education. On the other hand, a new finding is that females may be inferior to males in three techniques: decomposition, algorithm, and abstraction.","PeriodicalId":416504,"journal":{"name":"Information Engineering Express","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133564564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Economic analysis based on the mobile phone GPS data and monitoring consumer behavior during the COVID-19 pandemic","authors":"Yoshiyuki Suimon","doi":"10.52731/iee.v7.i2.601","DOIUrl":"https://doi.org/10.52731/iee.v7.i2.601","url":null,"abstract":"In order to understand what is happening in the underlying economy, it is useful to gain a picture of what people are doing. When people go out, they may do so in order to engage in some kind of economic activity. In this research, we measured the level of economic activity by gaining a macro picture of people's movements. Specifically, we used the location data (GPS data) of mobile phones owned by the customers of major Japanese mobile carrier au to measure changes in the movements of people in key urban areas, and to show the relationship between these changes and macroeconomic variables. Our results found a notable correlation between the number of visitors to city areas and GDP consumer spending and spending-related statistics. Furthermore, we found that the people's movements especially have a strong correlation with the consumption data of services. In addition, we found that there is an inverse correlation between online spending and the people's movements. In Japan, the spread of COVID-19 has had a marked impact on people's activity in 2020. This negative correlation indicates that a change in people's behavior while COVID-19 continues to spread, in the form of staying at home more, led to an increase in online shopping.","PeriodicalId":416504,"journal":{"name":"Information Engineering Express","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134278330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Recognizing a participant behavior in a multi-party conversation","authors":"Kazutaka Shimada, Shunsuke Yonemitsu","doi":"10.52731/iee.v8.i1.635","DOIUrl":"https://doi.org/10.52731/iee.v8.i1.635","url":null,"abstract":"","PeriodicalId":416504,"journal":{"name":"Information Engineering Express","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127162498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}