Katsuyuki Umezawa

Development and Evaluation of a Virtual PC Type Thin Client System

In recent years, it is thought that the virtualization of the desktop is important as an effective solution to various problems that a company has, such as cutting the total cost of desktop PCs that the company owns, achieving efficiency in operative management, and having successful security measures, compliance measures, and business continuity plans. We introduced a client blade-type thin client system, called a “CB system,” and a terminal service-type thin client system, called a “TS system.” The number of users in all of our current group companies is approximately 70,000. We built a virtual PC-type thin client system, called a “virtual PC system,” as a new virtualization technology for the desktop. In this paper, we give the problems we had when managing large-scale users in a virtual PC system and suggest the solution.

A study on user authentication infrastructure for next generation telematics

To receive a telematics service, it must first be authenticated, and each automobile (or car navigation system) has typically been linked to a particular vehicle owner who could authenticate such services. However, an increasing number of drivers use cars that are rented, leased, or obtained through a car-sharing program; in such cases, the present form of car authentication is insufficient. A better system would authenticate the individual who is using a car at a particular time, but is not necessarily the owner. In this paper, we propose a personal authentication infrastructure for next-generation telematics. Specifically, we propose personal authentication into that (1) between the person and the terminal, (2) between the terminal and the center.

A Method Based on Self-Study Log Information for Improving Effectiveness of Classroom Component in Flipped Classroom Approach

The flipped classroom approach has recently begun to attract attention. In a flipped classroom, the conventional roles of classroom and homework are reversed: students study on their own using digital teaching materials or e-learning prior to class and then apply their learning in classroom activities. The authors have developed a method for improving the effectiveness of the classroom component: the students in a class are grouped on the basis of the time they spent studying as recorded in their self-study logs and their degree of understanding as revealed by a self-study achievement test, and a different learning model is used for each group to improve their degree of understanding. Although they were unable to find a meaningful statistical difference in the test scores obtained in an experiment using one class of 34 students, there was a notable difference in the way questions were answered. The results of a free-description questionnaire indicate that the group learning encourages active learning.

Proposal and evaluation by simulation of management processing load control method for virtual client system.

In recent years, virtualization of desktops has become important as a solution for various problems caused from the cost of running a company. Our company began using thin client blade (CB) systems and thin client terminal service (TS) systems about ten years ago. There are currently about 70,000 users of these systems in our group companies. A thin client virtual PC system has been developed as a virtualization platform for the desktop. The management processing load dispersion in virtual PC system was designed for a large number of users. We previously reported a method that addresses this problem. In this paper, evaluation by simulation of a previously proposed improved method for managing the load imposed on resources in a virtual PC system showed that it effectively prevents significant load increases. The threshold for initiating management processing can be flexibly set, which enables the load in a virtual client environment to be precisely controlled. Use of this method would enable virtual clients to be managed more effectively.

An Effective Flipped Classroom Based on Log Information of Self-Study

Flipped classrooms have recently begun to attract attention. In a flipped classroom, the roles of a classroom and homework are reversed. Specifically, the students study on their own by using digital teaching materials or e-learning prior to a school hours and apply their learning mainly in the classroom discussions. In this paper, we propose a method for an effective flipped classroom based on the log information of the self-study. Specifically, when students study by e-learning at home, we collect learning logs. We classify students into groups on the basis of their study time and degree of understanding by analyzing the learning logs. We can improve the degree of understanding of the students by conducting a discussion and/or giving a presentation to each group in the classroom.

An authentication system using smart phones as secure storage

The smart phone penetration rate has increased recently. There are also many commercial terminals for receiving network services. When a service is received by a smart phone or PC, user authentication is very important for ensuring secure and safe use. Currently, authentication is required each time a user changes the terminal on which a service is received. We propose a system that uses a smart phone as a storage device for authentication information, such as ID, password, and cookie information. With this system, the smart phone and various terminals cooperate through short distance wireless telecommunications technologies such as Bluetooth. We evaluate performance of our proposed system. As a result, the user can input authentication information to and receive a service on a terminal by simply swiping the smart phone over the terminal.

A study on an authentication infrastructure between terminal and asp for next generation telematics

To receive a telematics service, it must first be authenticated, and each automobile (or car navigation system) has typically been linked to a particular vehicle owner who could authenticate such services. However, an increasing number of drivers use cars that are rented, leased, or obtained through a car-sharing program; in such cases, the present form of car authentication is insufficient. A better system would authenticate the individual who is using a car at a particular time, but is not necessarily the owner. In this paper, we propose a personal authentication infrastructure for next-generation telematics. Specifically, we propose authentication infrastructure between the terminal and the service provider (ASP).