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In a workplace where different workers do the jobs in relays around all day and night, e.g. a convenience stores and a hospital, a schedule which is suitable assignments of duty for a staff in each period of time is indispensable. In general, so far, the staff schedule is determined manually by considering the constraints which includes the original ones for each workplace. However, it is the case...
Because energy consumption in data centers is getting larger, the use of green energy for running data centers draws attention as a mean of reducing energy cost. The amount of green energy generated near data centers depends on environment of the data centers. When more green energy is generated, more jobs should be processed by using the generated green energy to reduce energy cost. This policy of...
It is an ongoing issue for all companies to determine how to satisfy customers continuously. Customer satisfaction has been broadly discussed as an indicator generally utilized to improve goods/services for customer retention. Since information and communication technology (ICT) is rapidly developing in every field, companies should capture customers' changes of mind or underlying dissatisfaction...
The purpose of this paper is to identify how the usage of mobile information services (MIS) contribute to quality of life for young Japanese users. We examined relationships between individual life domains and the domain of overall quality of life based on bottom-up spillover theory. Questionnaire surveys were conducted via online among young Japanese mobile student users of a university. We obtained...
Model of traffic infrastructure of multi-agent simulation model with mathematical optimization of urban traffic is improved by OpenStreetMap to simulate urban traffic more realistically. In this paper, the method to introduce OpenStreetMap data into the model and preliminary simulation results are shown.
This paper is a survey report about how users accept new social networking services (SNS). Questionnaires based on Technology Acceptance Model (TAM) with some extended factors were given to students for three years. With these questionnaire results, the changes of users' intention to use SNS are described, influences between factors in TAM are compared by structural equation modeling (SEM).
Internet of Things (IoT) is now considered as a key driving force for achieving next generation social systems. Several approaches have been proposed to achieve effective IoT communications, where each device has very limited communication capabilities. One such approach is the introduction of short packets for a lightweight communication protocol by which we can form a local area sensor network dedicated...
A speaker recognition method is presented that uses the distributed structure of lip-movement data. It overcomes the degradation in accuracy of a previous method based on the kernel mutual subspace method due to the genuine samples being close to those of other persons. The degradation in accuracy results from the strong nonlinearity of the distribution. This degradation is reduced by increasing the...
The number of man-months of HMI (human machine interface) development for embedded systems is increasing because of internationalization. Even though functions of embedded systems such as in-vehicle systems are largely the same for each country, the HMI design has to be customized to specific languages and requirements. For instance, adjusting the width and font of text improves its visibility. However,...
Future University Hakodate, in cooperation with Hakodate city Central Library, has developed a digital archives system. For the purpose of both maintaining the archives within the limited budget and making use of the archives as the field of research and education, students have participated in the development and the operation of the archives. The activities concerning the digital archives are particularly...
In IT-related departments or schools, system development PBL(Project-Based Learning) is focused as one of practical education methods. The evaluation method of students' learning for such PBL is less well-established, despite the fact that educational effects of PBL are highly appreciated. Presentations or reports of PBL have been used to evaluate team in terms of the degree of success as a project...
To achieve high-performance and platform-independent network virtualization among multiple service infrastructures in service providers' data centers, we propose hardware gateway-based data center network virtualization architecture where we place a gateway on each service infrastructure and inter-connect them using overlay network virtualization.
The use of connected cars has been spreading recently. Security for connected cars is very important because an attacker can access connected cars remotely. Security requirements defined based on risk assessment are necessary to protect connected cars from attackers. However, the conventional risk assessment technique mostly depends on the evaluator's security knowledge. Therefore, we propose a security...
A new backup method, which achieves on-demand restore as part of file system backup to object storage, is proposed. On-demand restore is a function that restores only a certain directory or file according to the request from an end user. The proposed method backs up relationships between a file and an object on a directory basis in order to efficiently handle the relationships in the restore. It is...
We propose a guideline for data placement in heterogeneous distributed storage systems. Heterogeneous distributed storage systems sometimes cause degradation of aggregate data throughput. The proposed guideline is that data accessed by a client should be placed equally to all servers. We evaluate a storage system configured by the proposed guideline by using sysstat and compare read/write data throughput...
A two-wheel inverted pendulum (TWIP) system is implemented based on a position and angle decoupled intelligent backstepping control system in this work. The decoupled method provides a simple way to achieve asymptotic stability control for a fourth-order nonlinear TWIP system. Moreover, an adaptive output recurrent cerebellar model articulation control (AORCMAC) is designed in this study to imitate...
An interactive, manageable and wearable LED matrix sign system is discussed. This system is realized by using Wiki software and Twitter. This system is also a bot network which consists of a Wiki page, Twitter and two bots. One bot of them is the device which reads the list of commands in the Wiki page and repeats to post a tweet on Twitter by interpreting the list of commands automatically. Another...
Along with the fast development of information technology, companies have extensively used self-service technologies (SSTs) to provide services. SSTs enable customers to perform entire services on their own without direct assistance from employees. Although self-service technologies may offer customers several benefits, people will not automatically accept and use it. Therefore, it has become increasingly...
In IR: Institutional Research, the quantity of study hours invested besides regular lecture periods has been the center of public attention and considered beyond essential when credit substantialization as well as educational quality assurance. Therefore, students are regularly to specify, on a survey, their extra hours spent on out-of-class activities related to their academic programs. By focusing...
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