Tsuyoshi Usagawa

Tsuyoshi Usagawa
Kumamoto University | Kumadai · Graduate School of Science and Technology, Faculty of Engineering, Faculty of Advanced Science and Technologoy

Dr.

About

192
Publications
38,247
Reads
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621
Citations
Introduction
Additional affiliations
April 2016 - March 2018
Kumamoto University
Position
  • Head of Faculty
April 1983 - present
Kumamoto University
Position
  • Professor (Full)

Publications

Publications (192)
Article
Full-text available
Educational process mining is one of the research domains that utilizes students’ learning behavior to match students’ actual courses taken and the designed curriculum. While most works attempt to deal with the case perspective (i.e., traces of the cases), the temporal case perspective has not been discussed. The temporal case perspective aims to u...
Article
The last two decades have witnessed a global revolution in educational information that has led to the development and promotion of e-learning. Blended Learning (BL) is an increasingly growing e-learning model with a background in pedagogical and psychological theory that combines both online and traditional activities. In recent years, it has been...
Article
Full-text available
In this paper, the authors present a predictive model for failure-prone students using access log data from two small datasets in the Moodle learning system. Although various advanced machine learning algorithms, especially supervised predictive methods, can be used with very large datasets, these tools are often not available for most initial univ...
Article
Full-text available
Bahasa Indonesia is one of the most prominent low-resource Languages that still lack development in regards to communication-assisting technology. This paper proposes an improved system for generating transcript and identifying speakers from a concurrent speech in Bahasa Indonesia. The proposed method is applicable in a situation such as an online...
Conference Paper
Academic cheating is a significantly common occurrence at the university level in developing countries particularly, in Afghanistan. In online education practices, it could be a difficult task for a better process of secret reconstruction and identifying/ detecting the potential cheaters. Due to a huge number of students and the rapid increase of o...
Conference Paper
Quality of education is a widely shared, primary demand, and a major target in the educational environment, and it guarantees the reputation and economic productivity in institutions' academic matters. However, due to the lockdown caused by the COVID-19 pandemic, all classes must still continue online and it challenges educators to use online tools...
Article
Full-text available
Mouse tracking serves as an alternative to eye tracking in measuring the learning process in education because of its affordability. Moreover, mouse tracking does not require extra hardware, as in the case of eye tracking, because it is a feature in personal computers by default. Therefore, it is possible to implement mouse tracking in a massive op...
Article
Full-text available
Learning performance is crucial in students’ academic lives because it opens opportunities for future professional development. However, conventional educational practices do not provide all the necessary skills for university instructors and students to succeed in today's educational context. In addition, due to poor information resources, ineffec...
Article
Full-text available
Abstract Pageview is the most popular webpage analytic metric in all sectors including blogs, business, e-commerce, education, entertainment, research, social media, and technology. To perform deeper analysis, additional methods are required such as mouse tracking, which can help researchers understand online user behavior on a single webpage. Howe...
Preprint
Full-text available
Pageview is the most popular webpage analytic metric in all sectors including blogs, business, e-commerce, education, entertainment, research, social media, and technology. To perform deeper analysis, additional methods are required such as mouse tracking, which can help researchers understand online user behavior on a single webpage. However, the...
Preprint
Full-text available
Pageview is the most popular webpage analytic metric in all sectors including blogs, business, e-commerce, education, entertainment, research, social media, and technology. To perform deeper analysis, additional methods are required such as mouse tracking, which can help researchers understand online user behavior on a single webpage. However, the...
Conference Paper
Full-text available
The education system in Afghanistan dramatically improved in recent years. According to the five-year strategic plan of the Ministry of Higher Education (MoHE) of Afghanistan, universities and higher education institutions should implement e- learning for delivering online education in their education systems by 2020. In this paper, we assess lectu...
Conference Paper
Full-text available
Bitcoin reaches $10000 per coins again, other cryptocurrency coins' value also drastically increases, and so will the desire for mining. Mining costs huge amount of electricity which is why renewable energy must be considered. The authors assembled a miniature solar powered miner for education and investigation whether profitability can be made. Th...
Article
Full-text available
One of the objectives of the performance measurement of grade-based higher education is to reduce the failure rate of students. To identify and reduce the number of failing students, the learning activities and behaviors of students in the classroom must be continuously monitored; however, monitoring a large number of students is an extremely diffi...
Conference Paper
Full-text available
Having a bone conduction (BC) transducer anywhere on the head will result in a BC sound reaching the cochlea in both ears. This "cross-talk" phenomenon may limit a listener's ability with a pair of BC transducer to sense sound direction. In this paper, we discuss a way to minimize cross-talks in BC sound reproduction using a method called "cross-ta...
Article
Full-text available
E-learning is an internet-based learning program. It has been adopted in Institut Teknologi Sepuluh Nopember (ITS) since 2006, and called SAHRE-ITS. It is managed by Directorate of Academic Affairs in ITS. Despite quite long adoption in ITS, there are still a number of problems to confront. One of them is lack of intent of the lecturers as the main...
Conference Paper
Nowadays, many universities around the world use web-based learning systems and a great number of courses are delivered on these educational systems. The possibility of tracking student’s activity in online learning environments led to increased interest in using machine learning methods to predict future outcomes. In this study, we present an earl...
Conference Paper
Full-text available
In the education sector, adoption of Learning Management Systems (LMSs) has turned the traditional teaching and learning more result-oriented and effective. Learning Analytics (LA) has a significant role to play in the future of higher education, where universities and higher education institutions are utilizing such concept to analyze and evaluate...
Article
Full-text available
Universities in developing counties have come to understand that relying on only traditional classrooms is not sufficient to advance students’ knowledge and skills. The rapid development of information systems and internet technology has brought many educational innovations that can eliminate the boundaries of conventional teaching and learning. Ho...
Conference Paper
Learning management systems generate a large amount of data, where knowledge discovery is possible using data mining techniques. We proposed simple prediction scheme using decision tree analysis for purpose of classification to identify dropout prone students in the middle of the semester based on previous year’s course characteristics for that cou...
Article
Full-text available
p>Due to today’s interconnected and technology-driven world, a physical learning environment is transforming into a virtual or online location where learners can make active learning with portable devices. There is no doubt that an increasing number of students, who have mobile devices which handle digital information and facilitate their mobility....
Article
Full-text available
A back-to-back speaker system with a user-designed filter results in a low-frequency cardioid-like radiation pattern where a back-facing loudspeaker is used to suppress the radiation in the rear direction. This paper presents an application of a low-cost single board computer as a digital signal processor on a back-to-back speaker system to obtain...
Conference Paper
Full-text available
Nowadays Information and Communication Technologies (ICTs) are widely used in a variety of fields all over the world. As for instance, use of ICT in education has transformed the way of delivering instructions from a traditional to modern and effective manner. As Afghanistan proceeds to move forward the higher instruction openings for its citizens,...
Article
"Bidik Misi" (BM) is a famous scholarship offered by Indonesia Government which has two main qualification aspects: economic needs and academic performance. Since BM scholarship was initiated in 2010, the number of candidates has increased year by year despite limited quota, causing difficulties in selecting the most qualified candidates. This rese...
Article
Full-text available
E-learning can be a potential solution to educational inequality problem in developing countries, like Mongolia, with vast land and sparse population. With the introduction of Massive Open Online Courses (MOOCs), some im-pressive cases bring the attention of the public towards it. But there is no spe-cific evidence that shows Mongolian students’ ex...
Article
Loudness as a subjective measurement and acceleration as an objective measurement were taken to measure the frequency characteristics of four different bone conduction actuators. The loudness of bone conduction was measured by balancing bone-conducted stimuli at 17 frequencies from 0.2 kHz to 8 kHz. The acceleration at equal loudness, which was mea...
Conference Paper
Directivity pattern of an ordinary loudspeaker becomes more directive at higher frequencies. However, because a single loudspeaker tends to radiate uniformly in all directions at low frequencies, reverberation from surrounding building walls may affect speech intelligibility when installing a multiple-loudspeaker system at crossroads. As an alterna...
Article
This paper introduces an implementation of a compulsory course, ``Digital Signal Processing I,'' in a blended learning style. This subject is delivered by two lecturers as weekly parallel classes using the same e-learning contents including online quizzes for weekly homework. This sophomore-level basic course is compulsory for all the students of t...
Conference Paper
Full-text available
Conventionally data collecting through surveys or quizzes are usually done by distributing hard paper based questionnaires or by directly asking people themselves. With the invention of the Internet, the base of these methods changes to online. For example, in a high developed information communication technology (ICT) University, the authorized pe...
Conference Paper
Massive Open Online Course (MOOC) is the most attractive recent developments in education, which offers new learning opportunities to deliver learning content online to anyone, no limit on attendance. There is ongoing debate about it’s educational value and significance. This study is to assess the awareness, perception and experience of using MOOC...
Technical Report
The authors have developed a survey method using hand carry server Raspberry Pi in order to reduce the burden of the surveyor. Because this model is designed for class room usage, it works only up to 100 concurrent respondents. In order to expand the capacity, more hand carry servers are deployed. Therefore incremental synchronization can be implem...
Conference Paper
https://www.ieice.org/ken/paper/20170527cbU2/eng/ The usage of e-learning in developing countries has gradually advanced in recent years with an improved availability of internet connections and information technology support. While e-learning technology introduced relatively late in Mongolian universities, there isn’t any notable implementation ye...
Article
Full-text available
Efficacy of delivery methods can be compared by studying human memory emphasizing how information is processed. The aim of this research is to identify factors which are influenced by methods of complex e-learning course delivery. Compilation of cognitive load theory and learning ability of Moodle survey plugin aids in analyzing evidence. Two plug-...
Article
The rapid development of the network technology and internet have changed the way of how files are distributed, including sensitive data such as medical record. Some methods have been applied to ensure its security, including those with cryptography or steganography, along with their advantages and disadvantages. While cryptography may attract susp...
Conference Paper
Full-text available
The Internet made it easier to access information almost anywhere at anytime. With all sorts of analytics such as pageview, behaviorist can see how users browsed the web. However there is a limit to how much data pageview analytic can provide. Pageview can answer what, when, and where a webpage is viewed but cannot answer how a page is viewed. Simp...
Conference Paper
Full-text available
Many researchers had used the page view feature to identify the behavior of online users. Evaluators on e-learning for example used content views, quiz attempts, and scores to analyze the students' performance. However, these data still lacks some details compare to thorough face to face evaluation. The data can answer what, when, and where, but ca...
Article
The development of computer graphics–rendering technology is rapidly increasing—the next-gen game can present 3D images that are closer to reality and can be run in real time. This allows the emergence of a new technique called “machinima,” derived from the words machine and cinema, to make real-time animation movies in a virtual environment. Machi...
Article
A pair of bone conduction actuators is used for music reproduction as replacement of headphone. Because of strong inter-aural coupling, it is though the stereophonic reproduction is not easy to realize by bone conduction actuators. Haim Sohmera, et al. 2000, reported that “there is no need to vibrate bone in order to obtain 'bone conduction' respon...
Article
Manually placing and animating virtual camera in a dynamic virtual environment to generate computer animation is a complex and time-consuming process. For this reason, this paper proposes a method to take the sequential shot by gameplay, to determine the best camera placement candidates as an unorganized point set, to reconstruct a curve by the poi...
Article
Full-text available
p class="3">Textbook costs have skyrocketed in recent years, putting them beyond the reach of many students, but there are options which can mitigate this problem. Open textbooks, an open educational resource, have proven capable of making textbooks affordable to students. There have been few educational development as promising as the development...
Article
Full-text available
p class="2">The Kingdom of Tonga is an isolated least developing country located on the northeast of New Zealand with a population of 103,252 (2011 census) and with a gross domestic product per capita of USD $2,545.20. Before educational systems in a least developing country like the Kingdom of Tonga begin employing e-learning, an assessment of the...
Conference Paper
E-learning has been widely implemented in educations system. Most higher institutions have applied Learning Management Systems (LMSs) to manage their online courses, with Moodle as one of the most favored LMS. However on the other side creating a well designed and written course remains problematic for teachers. That's why the community encourages...
Article
Full-text available
In the last few years, open textbook development has picked up dramatically due both to the expense of commercially published textbooks and the increasing availability of high-quality OER alternatives. While this offers a tremendous benefit in terms of lowering student textbook costs, the question remains, to what extent (if any) do open textbooks...
Article
Full-text available
Textbook prices have been soaring at an unprecedented pace for the last four decades with no signs that this trend will end anytime soon. Several studies have suggested that a solution to this problem comes in the form of open textbooks. As a result, the growth of open textbooks is rapid and sustained. However, though the advent of open textbooks i...
Conference Paper
In today's digital age, electronic learning (e-learning), refers to learning via the Internet, has become a significant trend. Accordingly, the higher education institutions progressively contribute to providing e-learning. This paper describes the first development and implementation of blended learning courses at Sam Ratulangi University (UNSRAT)...
Conference Paper
“Bidik Misi” scholarship program had been released by Indonesia Government since 2010. The main qualification has two aspects; family's economics and academic performance. The qualification parameters of “Bidik Misi” scholarship are divided into two groups. The first group is used to measure the poverty level of candidates and the second group is u...
Conference Paper
In order to obtain the feedback of students perception on delivered e-learning course, we have conducted a survey. The survey focused on the virtual programming lab (VPL) for the electrical power system course. The VPL is an activity module for Moodle that manages programming assignments. The survey consists of two ways, online and offline. As the...
Conference Paper
Mobile learning is considered as a current research field to be explored especially in the developing country. This study investigates students' acceptance of mobile learning in higher education in Indonesia. This work involves 420 undergraduate students at Sam Ratulangi University (UNSRAT) Manado as respondents. The data gathered through a set of...
Article
Full-text available
In recent years, Information and Communication Technology (ICT) development has spurred the growth of the Internet and networked technologies, influencing lifestyles, businesses, training and work processes including in the educational area. Educational institutions use ICT as a tool for teaching and learning in a number of ways including but not l...
Article
Full-text available
Nowadays, the advancement in educational technology accelerated by the dissemination of Internet has a potential opportunity to improve the quality of education by encouraging participation and collaboration between lecturers and students. In education, quizzing and testing have typically been used as evaluative tools to assess student performance....
Article
Students' attendance records of classes are primary and required data to manage a course and to take care of students, but a recording task causes extra burden and loss of lecturing time. An attendance management system using student identification card with IC chip has been proposed and implemented in several universities. Even those systems work...
Article
Facebook® is a popular social network. There are approximately 1 billion registered users as of 2013. On the other hand, developing countries are starting to take advan- tage of the free platform and capabilities provided through facebook. The Island Kingdom of Tonga located in the South Pacific is also taking advantage of this social network. The...
Article
Full-text available
Textbook prices have soared over the years, with several studies revealing many university students are finding it difficult to afford textbooks. Fortunately, two innovations – open educational resources (OER) and open textbooks – hold the potential to increase textbook affordability. Experts, though, have stated the obvious: that students can save...
Article
Full-text available
Many universities have begun implementing e-Learning systems due to their low cost. However, publishers of expensive textbooks stand in the way of e-Learning's ability to provide a cost-effective educational delivery model. While many universities aim to overcome this opposition and replace traditional publishers' textbooks with free open textbooks...
Article
Various binaural models have been proposed for the application of hearing assistance system as well as humanoid robot, and a frequency domain binaural model(FDBM) is the one. Like other binaural models, the original FDBM can separate and segregate a signal from the specific direction based on interaural information, but it works only in the frontal...
Article
Bone conduction is being utilized widely for music reproduction and hearing aids. However, due to unclear transmitting process of bone conduction, some detailed characteristics are still in discussion. Previous researchers has made achievements on frequency characteristics of bone conduction actuators by comparing the relationship between loudness...
Conference Paper
Estimation of sound source directions and separation of the sound sources are implemented on many products widely, and one of the applications is binaural hearing aids. In conversation using binaural hearing aids, continuous tracking of sound sources with acoustics signals are sometimes complicated because sound sources move dynamically. In order t...
Conference Paper
Sharing learning contents over distributed learning management systems (LMSs) is an important issue in order to reduce the burden for building well-designed contents. As a lecturer, regular updates of contents for on-going courses are really important because contents should reflect the learners' attributes as well as for corrections and additions...