Interdisciplinary Information Sciences

On the Universal Norms of Some Abelian Varieties Over Local Fields

Hideo IMAI

1997 年 3 巻 1 号 p. 1-4
発行日: 1997年
公開日: 2003/06/11

DOIhttps://doi.org/10.4036/iis.1997.1

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Let F be a finite extension field of Q_p, A an abelian variety defined over F with ordinary good reduction and with sufficiently many endomorphisms (see the theorem below for a precise statement). In this paper we prove that there exists unique Galois extension M of F such that for a Galois extension K of F, the group N_K ⁄F(A ) of universal norms is finite if and only if K contains M. Our result generalizes that of J. Coates and R. Greenberg [1] which concerns the case of elliptic curves.

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Expansion in Harmonic Wavelets of a Periodic Function

Tohru MORITA

1997 年 3 巻 1 号 p. 5-12
発行日: 1997年
公開日: 2003/06/11

DOIhttps://doi.org/10.4036/iis.1997.5

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A harmonic wavelet expansion of a periodic function is derived by rearranging the Fourier series. Wavelet expansion formulas which are useful when the expansion is truncated, are presented.

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Code Assignment Algorithm for Highly Parallel Multiple-Valued k-Ary Operation Circuits Using Partition Thory

Michitaka KAMEYAMA, Saneaki TAMAKI

1997 年 3 巻 1 号 p. 13-24
発行日: 1997年
公開日: 2003/06/11

DOIhttps://doi.org/10.4036/iis.1997.13

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Design of high-speed digital circuits such as adders and multipliers is one of the most important issues to implement high performance VLSI systems. This paper describes a code assignment algorithm for ultimately parallel multiple-valued k-ary operation circuits. Partition theory usually used in the design of sequential circuits becomes effectively employed for the fast search for code assignment problem without exhaustive procedures using logic design. We propose an efficient code assignment algorithm based on chain sets to reduce the complexity in search procedure. Experimental results and some examples are shown to demonstrate the usefulness of the algorithm.

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Behavior Study of a Combination of FLC and GA Controlling a Robot Arm Along a Desired Trajectory

Majid Nili AHMADABADI, Eiji NAKANO

1997 年 3 巻 1 号 p. 25-36
発行日: 1997年
公開日: 2003/06/11

DOIhttps://doi.org/10.4036/iis.1997.25

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Behavior of a combination of a fuzzy logic controller (FLC) and genetic algorithms (GAs), when controlling a robot arm along a designed trajectory, is studied. In the investigated method, which henceforth will be referred to as GFLC, genetic algorithms, by modifying the consequences of the linguistic rules, train the FLC so that path tracking of the system is improved.
In this paper, the possibility of applying GFLC to a single arm robot is first discussed theoretically. Then, to investigate GFLC’s performance under some different conditions, a series of simulations on a model based on a single link manipulator are conducted. Finally, to study the practicality of this technique, GFLC is applied to a real single arm robot.

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Investment Estimation of Telecommunication Industry in Japan: A Study in the Economics of Information Society

Tadashi KURIYAMA

1997 年 3 巻 1 号 p. 37-56
発行日: 1997年
公開日: 2003/06/11

DOIhttps://doi.org/10.4036/iis.1997.37

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This work reports an estimate of demand for telecommunication services and an estimate of the investment cost of constructing telecommunication infrastructure in Japan for the period of 1996-2025. Economic models are formulated to describe main activities of the Japanese telecommunication industry including mobile communication, the Internet, Public Switched Telephone Network PSTN and Broadband Integrated Services Digital Network B-ISDN. Under a number of assumptions on macro economic and social indices, we make a forecast of the number of subscribers to telecommunication services, the amount of investment to satisfy the demand, the operating costs, the operating incomes and loses, and the cash-flow of the operator. Comparing some scenarios, we estimate the amount of public finance to promote the construction of the information infrastructure.

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Change of Electorate’s Involvement in Electoral Process; with Special Reference to “Spectatorial Democracy”

Hiroshi OKADA, Shiro ABE

1997 年 3 巻 1 号 p. 57-64
発行日: 1997年
公開日: 2003/06/11

DOIhttps://doi.org/10.4036/iis.1997.57

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In news articles in Japan, the phrase “Spectatorial Democracy” has been used to explain the “contradiction” between increase of watching TV programs of elections and decrease of voting turnout. In this paper, we try to explain those phenomena without using such a new phrase as “Spectatorial Democracy”, considering watching TV programs of elections from the point ofview of electorate’s involvement in electoral process.

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Reducing Procrastinate to Feature Strength

Masayuki OISHI

1997 年 3 巻 1 号 p. 65-70
発行日: 1997年
公開日: 2003/06/11

DOIhttps://doi.org/10.4036/iis.1997.65

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This paper will discuss the notion of the principle of Procrastinate. The principle was introduced as an economy principle in Chomsky (1992/1993/1995) to account for why LF operations cannot take place in overt syntax. We will first see general issues bearing on the notion of economy principles, then review the contexts where Procrastinate is employed. After the preparatory discussion, we will propose a more successful way to look at the notion of Procrastinate, reducing it to feature strength, and suggest that Spell-Out directly defines a logical form.

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