Koichi Haruna

A Petri Net-Based Controller for Flexible and Maintainable Sequence Control and its Applications in Factory Automation

A new type of software system for an industrial sequence controller is proposed. In this system, a control program is described with the Petri net-like language named Control-net (C-net). This language improves control software maintainability and flexibility. An efficient C-net interpretation schema for real-time control is presented and an overhead time evaluation model of the proposed schema is developed. Through the model analysis and measurement of the response time of an interpreter on a microcomputer, it is proved that the interpretation schema satisfies the required response time. Finally, a microcomputer based controller named Station Controller (SCR) in which the presented C-net interpreter was installed is described and several applications of this controller to real systems are illustrated.

Technology policy staff; key factors in implementation

In order to cope with the rapidly changing interplay between technology and market in information industries, particularly in R&D activities in large corporations, a persistent and clarifying interplay among the participants must be lead by policy scientist as a policy process. The author of this paper argues that with emerging digital media-enabled innovations, Lasswells (1971) concept of policy sciences and its process has become applicable to the problem of this technology innovation, if behavioral sciences view points on Technology Policy Staff are appropriately taken into consideration in terms of structure and power of the decision field. Several experiments on the perspective were made by himself in real worlds. The goals that were clarified through the persistent interplay among the decision-makers, the other participants and the author are shared and under implementation. The results of a couple of experiments in real world problems were appreciable and consequently corporate-wide application of the concept of TPSs has started in an organization.

A mathematical model for air pollution control in urban areas

A new mathematical model for air pollution control in urban areas is proposed. Urban air pollution is the result of the accumlation of pollutant, caused by the transition of the wind fields. In the present paper, the feature of urban air pollution phenomena is discussed first. Secondly, a new model structure is proposed which treats the concentration of pollutant in the background separately from the whole pollutant. Finally, an example of numerical simulation based upon the proposed model is shown.

Technology policy staff in R and D management to overcome increased complexities and speed in information industries-a policy science approach

In order to cope with the rapidly changing interplay between technology and the market in the information industries, particularly in industrial R&D activities, a persistent and goal-clarifying interplay among the participants for the purposes of problem anticipation, mobilization of motives and knowledge, and fast, realistic actions must be led by policy scientists (technology policy staff) as a policy process. This paper shows, based on the authors own experiments, that with emerging digital media-enabled innovations, H.D. Lasswells (1971) concept of policy science and its process can be applied to the problem of technology innovation, if a behavioral sciences viewpoint on technology policy staff is taken into consideration appropriately in terms of structure and power. The results of a couple of experiments in real-world problems were quite appreciable, and the consequence is emerging discussions for more general adoption of technology policy staff.