We designed a special CMOS circuit for reaction-diffusion computers that accepts optical inputs in parallel and generates excitable spatial waves on a chip surface. We demonstrated the spatiotemporal properties of the proposed circuits by fabricated LSIs.

Solving algebraic word problems requires executing a series of arithmetic operations—a program—to obtain a final answer. However, since programs can be arbitrarily complicated, inducing them directly from question-answer pairs is a formidable challenge. To make this task more feasible, we solve these problems by generating answer rationales, sequences of natural language and human-readable math...

We study the rotating wave patterns in an excitable medium in a disk. This wave pattern is rotating along the given disk boundary with a constant angular speed. To study this pattern we use the wave front interaction model proposed by Zykov in 2007. This model is derived from the FitzHugh-Nagumo equation and it can be described by two systems of ordinary differential equations for wave front an...

We investigate the effects of heterogeneous delays in the coupling of two excitable neural systems. Depending upon the coupling strengths and the time delays in the mutual and self-coupling, the compound system exhibits different types of synchronized oscillations of variable period. We analyze this synchronization based on the interplay of the different time delays and support the numerical re...

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The Mizar system is equipped with a very large library containing tens of thousands of theorems and thousands of definitions, which often use overloaded notation. For efficient authoring of new Mizar articles it is necessary to have good tools for searching and browsing this library. It would be ideal if such tools were simple, intuitive and easy to access. Particularly, they should provide int...

53–63, 2001). This allows for rapid presentation of proIon Channels of Excitable Membranes, cessed antigen to T lymphocytes. The very recent dem3rd Edition onstration that ubiquitinated HIV Gag protein hijacks By Bertil Hille Tsg101 to drive virus particle budding from the cell surSunderland, MA: Sinauer Associates (2001). face (Garrus, et al., Cell 107, 55–65, 2001) is another 814 pp. $85.00 p...

A strain of Clostridium welchii produced spores in ordinary blood agar plates. Investigations confirmed that it was the character of this particular strain and that the laboratory media were not inducing sporulation. During a period of 12 months a total of 100 strains of Cl. welchii were studied. None of them produced spores in ordinary laboratory media and conditions when examined microscopica...

A simple scalar coupled map lattice (sCML) model for excitable media is derived in this paper. The new model, which has a simple structure, is shown to be closely related to the observed phenomena in excitable media. Properties of the sCML model are also investigated. Illustrative examples show that this kind of model is capable of reproducing the behavior of excitable media and of generating c...

This article has two aims. First I argue that the old habits of the printed book often have influence on our way of thinking in our work with electronic texts. I stress here the importance of evaluating the new possibilities that the new technological tools provide for philological work. In the second part I present a project that is currently working with the Old Swedish material from the Vads...