Abstract—Consideration was given to calculations of the parameters of transition between two opposite-magnetization domains in a thin-film working layer of the hard magnetic disk with regard for the saw-toothed form of transition. The transition parameters were related to the properties of the magnetic disk working layer and the magnetic head characteristics. For various recording densities, the levels of the playback signal and the resolution coefficient were determined.

Abstract—Analytical expressions for the scalar magnetic potential vs. variation of magnetization in the pole of a thin-film magnetic head, pole dimensions, and the horizontal and vertical pole positions relative to the plane of the hard-disk working layer were established. Expressions for the magnetic stray fields vs. the horizontal and vertical poles were obtained by studying the pole domain structure vs. the external magnetic field and determining the domain of magnetization variation in the pole marginal zones vs. the external field. Expressions for the write fields of the thin-film heads were established as a superposition of the pole stray fields. Examples of calculations of the write fields were given for various kinds of the thin-film magnetic heads.

Design principles for of a mathematical model of the semiconductor photodetector meant for the operation in specialized computer vision systems in optical section scanning are stated. Is composed a system of equations with partial derivatives describing physical processes in separate constructively prescribed segments of the photodetector structure. The general solution is obtained as a superposition of partial solutions relating to different combinations of physical actions on the structure—external light and internal electric fields—on these segments. Families of computed and experimentally obtained output coordinate characteristics of the photodetector are given. The adequacy of the model is confirmed by the similarity of these characteristics. The model can be used on different stages of projecting and operating for photodetectors of this class.

Abstract—Consideration was given to a controllable architecture enabling easy, simple and prompt self-testing in the programmable logic matrix. An approach was proposed to reduce the amount of self-testing hardware by compacting the test response by mod 2 convolution schemes through reconfiguration of the subject of diagnosis programmed in the matrix and using its standard connections.

Abstract—The matrix method for localization of a faulty block that was proposed earlier by the present author was considered as applied to a discrete device with multi-output blocks At that, the question of reducing the amount of the test hardware was solved by constructing appropriately the matrix of block outputs. An algorithm for such construction was given.