Toshihiro Kita

Development of real time stability monitoring system for power system operation

This paper presents an on-line real time stability monitoring scheme. The proposed stability monitoring system is set up by using a personal computer (PC) with AD conversion interface. To investigate the accuracy of the monitored results, experimental studies has been performed on an analog simulator. A four-machine infinite-bus system was utilized for the tests on the analog simulator. The test system has two modes of oscillations: high frequency local modes beyond 1 Hz related to individual unit, and a low frequency global mode from 0.3 to 0.4 Hz. The damping and the frequency of these two typical modes are identified accurately by using the proposed on-line monitoring system.

Experimental studies of three dimensional fuzzy logic power system stabilizer on damping of low-frequency global mode of oscillation

The paper investigates experimentally the damping of multi-mode oscillations achieved by a three-dimensional fuzzy logic power system stabilizer on a laboratory system at the Central Research Institute of Electric Power Industries, Japan. The utilized control scheme is based on the polar information of generator state and the scheme is simple enough so as not to require intensive computation for the controller. Only real power output signal from the study unit is utilized to generate supplementary stabilizing signals. Through signal conditioning all the required information, i.e. two-dimensional acceleration/speed state or three-dimensional acceleration/speed/phase state, is derived from the measured real power output. The effectiveness of the control scheme has been demonstrated through experiments on the four machine laboratory system with multi-mode oscillations. Comparison studies have also been performed to show the advantages of the three-dimensional fuzzy logic power system stabilizer over conventional power system stabilizer.

Mashup approach for embedding algebraic manipulations, formulas and graphs in web pages

We are developing a system that can embed algebraic manipulations, mathematical formulas and graphs in web pages without any plug-ins by using a mashup approach. The web page loaded from any web sites as a learning management system (or loaded as a local file) can embed algebraic manipulations and visualize mathematical formulas using MathML by accessing an external web application server which provides Maximas functions in cross-domain and asynchronous communication, where the Maxima is a free open-source computer algebra program. Our system also provides a function of plotting graphs dynamically by the combination of the Maxima and Flot, where Flot is a JavaScript plotting library for jQuery using HTML 5. We developed a prototype system and applied for several web contents for checking its possibilities.

Web-based time schedule system for multiple LMSs on the SSO/portal environment

We developed a web-based time schedule system as an important feature of the university portal along with our universitys long-term ICT (Information and Communication Technologies) plan. By using the system, students and professors can get their own course timetable in collaboration with the Student Information System (SIS). Each course name on the timetable is linked to the corresponding course page on the Learning Management System (LMS) through the Single Sign-On (SSO). The system is adapted to multiple LMSs which can be selected by the course professor. In order to widely cooperate with other systems, the system is designed by using global standards (IMS Enterprise, JSR-168 Portlet, etc.) and open source software (uPortal, CAS, JSF, Hibernate, etc.) as possible as we can. This paper shows the major functions, the measured use of the portal and the time schedule system over eight months, and the implementation especially for supporting multiple LMSs, syllabus and grade books.

Fusion of E-Textbooks, Learning Management Systems, and Social Networking Sites: A Mash-Up Development

Online education has provided good opportunities for educationally disadvantaged people. However, some traditional learning management systems (LMSs), the base systems of online education, had the limitations in offering standardized education for diversified learners with different skills, objectives, abilities, preferences, and backgrounds. In addition, the traditional LMSs, which required a constant connection of the Internet, could not be used where it is not available, that is, in the half of the world. Thus, we developed a new learning platform for large-scale online courses (LSOC), called “the Creative Higher Education with Learning Object (CHiLO)”. CHiLO is a comprehensive, open-network learning system which can realize e-textbooks, competency-based education (CBE), digital badges, and social learning. CHiLO can contribute to future research on next-generation learning content based on e-books and a flexible, diversified learning environment for people worldwide.

Remote sensing course, beginning with Telnet and ending with network programming

A remote laboratory system is designed for a remote sensing course. The system provides a learning environment where learners can study remote sensing with some experiments, beginning with telnet and ending with Java network programming. The learners PC can be connected to experimental instruments with various sensors through the Internet using the standard TCP/IP protocol. The system was practically used on the course at Nagoya University, where students were connecting their PCs to the servers located at both Nagoya and Kumamoto University, where those universities are separated by a thousand kilometer.

Improvement of student laboratories in electrical and computer engineering

Japanese universities have reformed quickly since the Ministry of Education changed the university standards in 1991. Each university must establish an identity to survive. Many things, such as curricula, syllabi and entrance examinations have been reformed. Here, a trial innovation in student laboratory activity in the Department of Electrical and Computer Engineering, Kumamoto University, is presented as one of the university reforms. Key aspects of the innovation involve presentation of results, introduction of long-term subjects, construction of a new building, incorporation of Internet instructional materials and fabrication after design. These improvements were achieved while maintaining the advantages of traditional student laboratories.

A Discussion on Effective Implementation and Prototyping of Voice User Interfaces for Learning Activities on Moodle.

Voice User Interfaces (VUI) are effective and intuitive for many people. The VUI is rapidly becoming suitable for various practical purposes using voice-operated smartphones, or smart speakers like Amazon Echo or Google Home. If VUIs, which may require less cognitive load to use, are available on learning management systems (LMS) like Moodle, they could enhance LMSs’ functionality. This study demonstrates examples of existing educational applications for VUIs and chatbot interfaces. Design suggestions for VUIs for several Moodle activities are also described, and a prototype VUI for Moodle quizzes has been developed with the Dialogflow platform.

Learning System based on Decentralized Learning Model using Blockchain and SNS.

Learning needs to transcend traditional school education to cover the whole array of learning available, such as advanced technology, arts, or sports so that people can keep learning, training, and practicing at their own pace throughout their life. To fulfill these needs for learning, we have constructed CHiLO, a decentralized learning system, which utilizes e-books. We are now developing an entirely new learning system using blockchain to solve the issue regarding the copyright of CHiLO and to build a new learning model utilizing virtual currency. This paper reports the first phase of the implementation details of the new system, which allowed the ownership rights of the blockchain assets to be managed to create e-books by combining the posts on the SNS and paying in virtual currency.

Development of a Learning Economy Platform Based on Blockchain

Knowledge-based societies require more than just the accumulation of existing knowledge. Knowledge must be continuously updated and new knowledge must be created. In this paper, we propose a learning economy model that incorporates market economy principles. The model contributes to the production, dissemination, and monetization of new knowledge based on a blockchain technology. This study aims to propose the learning economy model and an example of implementing this model.