Masahiro Ukigai

An innovative hands-on laboratory for teaching a networking course

This paper describes our laboratory experience of teaching a networking course and reactions from students who are taking this course. In this paper, we propose a unique laboratory approach for teaching administrative aspects of computer networking employing virtual machine software. Our laboratory is able to considerably speed up the ability to configure domain networks in various learning situations. The situations are realized by setting pre-configured and non-configured server image files as the virtual machines disk drive. Pre-configured typical server settings are able to help students to learn network configurations quickly, and to concentrate on their learning objectives. Non-configured ones are able to help students to design and construct an enterprise network from scratch in our laboratory without any risks.

A Study Support System on a Hands-on Networking Laboratory

- In the present paper, we describe the mechanism and performance of a LAN building support system for the undergraduate study of LAN administration. The present system can be used to make a real hierarchic network from design information alone in a short time. Using the present system, students are able to select a LAN design for study as an administrator. The study of the administrative aspects of LAN management with active communication has become important. We built a hands-on networking laboratory in which each student is able to study LAN administration from the perspective of a user to that of a network manager, without any risks. Students are able to study how to design networks and construct servers on each domain network, which consists of a router and a number of hosts. Undergraduate students evaluated this system highly. In addition, some of the students requested additional study using a different LAN structure. By switching LAN structures, students are able to develop skills that are needed in LAN management for different design structures. Therefore, we propose a support system for more effectively and efficiently developing advanced skills in LAN administration. Index Terms ‐ Networking Laboratory, LAN Administration, Virtualization Technology

Work in Progress: An Innovative Supporting System for Developing Advanced Skills in LAN Administration

In the present paper, we describe the mechanism and performance of a LAN building support system for the undergraduate study of LAN administration. The present system can be used to make a real hierarchic network from design information alone in a short time on a hands-on networking laboratory that we already suggested. Using the present system, each student is able to develop advanced skills on a personalized LAN, and to study LAN administration from the perspective of a user to that of a domain network administrator. We realized this short time building to implement an automatic mechanism of LAN device configuration and initializing networking hosts. On the target networking laboratory, students are able to study how to design networks and construct servers on a hierarchical network with administrative privilege and no risks

Computer assisted learning within the Smalltalk-80 environment

The authors discuss the potential of Smalltalk-80 for a teaching and learning environment. A laboratory-based introductory computer systems and programming course has been taught for more than three years within the Smalltalk-80 environment at the Department of Computer Science, Chiba Institute of Technology. The laboratory equipment consists of 45 networked workstations, in which Smalltalk-80 is implemented under the UNIX operating system. Courseware for the introductory course is embedded within the Smalltalk-80 environment for use by freshmen. Within the environment, students have been able to learn the course effectively based on a trial-and-error approach keeping their learning pace.<<ETX>>

Sound reflection from a rigid concave/convex disk and its application to a spherical concave source

This paper presents an analytical technique for calculating the amplitude of reflected sound waves from a rigid concave/convex disk. The formulas for the reflectivity are derived approximately under certain geometrical restrictions using Fresnel‐Kirchhoffs diffraction formulas. Moreover, we identify the reflected sound pressure from a concave disk when a point source is located at the center of curvature with the radiated sound pressure from a spherical concave source, whose surface vibrates at the same time. Then we analyze the radiated sound pressure from a spherical concave source under this condition. To verify the validity of the approach, some experiments were performed in air. Experimental results showed good agreement between the calculated and the measured values and this confirmed the usefulness of the present technique to calculate the amplitude of reflected sound waves from a concave/convex disk.