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We propose herein a motion detection artificial vision model which uses analog electronic circuits. The proposed model is comprised of four layers. The first layer is a differentiation circuit of the large capacitor and resistance (CR) coefficient, and the second layer is a differentiation circuit of the small CR coefficient. Thus, the speed of the movement object is detected. The third layer is a difference circuit for detecting the movement direction, and the fourth layer is a multiple circuit for detecting pure motion output. The model was shown to be capable of detecting a movement object in the image. Moreover, the proposed model can be used to detect two or more objects, which is advantageous for detection in an environment in which several objects are moving in multiple directions simultaneously. From a technological viewpoint, the proposed model facilitates clarification of the mechanism of the biomedical vision system, which should enable design and simulation by an analog electric circuit for detecting the movement and speed of objects.

The purpose of this paper is to propose and examine the new user support in university network.

The new user support is realized by use of DACS (Destination Addressing Control System) Scheme which manages a whole network system through communication control on a client computer. This DACS Scheme has been studied conventionally by authors.

The new user support is more simplified than the normal user support in the network based on TCP/IP.

As a future research, the authors will implement the system for realizing DACS Scheme and apply that system to practical network. Then, the new user support proposed in this paper will be realized in practical network.

The functions needed for the new user support are confirmed. Some functions was confirmed in the past research. The other function is confirmed in the section of experimental results.

In the network introducing DACS Scheme, the setting of the client does not need to be changed at the time of changing a network system. In addition, annoying communication becomes very simplified. The first point is that the client computer which transmits annoying communication is specified simply. The second point is shown as follows. Because the influence to others is prevented by blocking a communication port of the client computer, time margin for the cause specification of annoying communication and the coping with it is generated effectively.

This paper derives three evaluation measures of file recovery with n archive copies: when a failure is detected uniformly during (0, T),the mean recovery overhead, the overhead rate and the availability are obtained. Optimal archive copies intervals T* which minimize or maximize those measures are analytically discussed. When faults occur at random, they are given by unique solutions of the same type equations. Finally, a numerical example is shown.