Computer image processing is becoming a helpful tool even in industrial inspections. A computerized method for welding visual inspection is proposed in this paper. This method is based on computer image processing of X-ray photograph of welding, in which the appearance information of weldments such as shape of weld bead really exists. Structural patterns are extracted at first and seven computer measures for inspection are calculated using those patterns. Software system for visual inspection is constructed based on these seven measures. It was experimentally made clear that this system can provide a performance of more than 0.85 correlation to human visual inspection. As a result, the visual inspection by computer using X-ray photograph became a promising tool to realize objectivity and quantitativity of welding inspection. Additionally, the consistency of the system, the possibility to reduce computing costs, and so on are discussed to improve the proposed method.

A polarization interferometer capable of measuring film thicknesses ranging from 10 to 3000 is described. A suitable system for measuring thickness of films in resist patterns is designed. The film thickness is measured in terms of the azimuth angle rotation of a plane polarized light. Experimental details are given, along with the results of thickness measurement of Alluminium films. Possible sources of errors and various parameters affecting the precision of measurement are discussed. The measurement error is estimated to be less than 0.1% . The precision of measurement is found to be 30 under normal laboratory conditions and can be improved to 1 by protecting the system from environmental disturbances. With some design modifications, the system could be used for the measurement of very narrow profile of films such as one we meet in the case of the resist pattern. Calculations show that resist films with widths of profile as small as 6 µm can be measured by this method.

A regulation model of the platelet count was proposed. All the characteristics of the components of the model in the normal state were determined from clinical and experimental results using numerical simulation procedure. Platelet counts of a subject with cyclical thrombocytopenia, measured over a period of 244 days, revealed that the maximum platelet count was 890,000/µl and the minimum count was less than 1000/µl. In addition, nine platelet survival curves were measured within the same period. Analyzing the 9 platelet survival curves, one of the factors causing cyclical thrombocytopenia appeared to be the periodic elevation of the platelet destruction rate. From simulations done under condition that the destruction rate varied cyclically, it was found that the variation rate of peak value of platelet counts was affected by four major parameters of the model. The average daily destruction rate during the period of measurement of survival curves was estimated in such a way that the square error between the estimated and observed curves was made small by adjusting one of the four major parameters. The second factor was found to be a slow variation of the maximum production rate of magakaryocytes (precursor cells of platelets).

A new stapler-type fiber cutting tool for obtaining good fiber end surfaces is described. T he size of the tool is about 2 cm wide, 3 cm high, and 10 cm long. The weight is only 90 g. In principle, the fiber is scored and than fractured by applying the tensile stress and bending stress simultaneously. The optimum conditions for cutting the fiber are investigated: The blade pressure is from 15 to 32 g, tensile stress from 6 to 13 kg/mm², and bending stress around 10 kg/mm². The average breaking angle of 0.6is easily obtained. It is confirmed that the tool is fully endurable for use in field.

Some properties ^π on graphs are characterized in terms of a set S(π) of forbidden graphs, that is, a graph G satisfies property π if and only if G has no subgraph homeomorphic (subcontraction isomorphic) to graph in S(π). Among such properties, ^πplanarity" is the most famous, where S(π){K_{3, 3}, K₅}. This paper clarifies the relations among such properties and presents necessary and sufficient conditions for a property to be characterizable in terms of k-connected (k1, 2, 3) forbidden graphs.

Time domain equalizer performance in a non-minimum phase multipath channel is estimated analytically. In a two-ray fading model, this channel is characterized by the amplitude ratio if the interfering ray to the direct ray, where the ratio is greater than unity. Based on the theoretical analysis of intersymbol interference, it is shown that in the non-minimum phase condition the decision feedback equalizer does not have as large an improvement factor as has been reported for minimum phase condition. However, detailed signature analysis shows that the decision feedback equalizer in the non-minimum phase condition has an equalization capability better than a linear transversal equalizer in a range where the amplitude ratio is close to unity.

Transverse electromagnetic transmission cells are analyzed with high accuracy using a mixed discretization based on both of constant and linear elements in a boundary element method, in which we can take account into discontinuous values of a normal derivative of the potential at corners in the cells.

Properties of the flux-flow type Josephson oscillator coupled to a quasiparticle detector through a planar stripline cavity are investigated in the millimeter wave region. The present coupling scheme is essential for magnetic field isolation between the oscillator and the Josephson rf-devices, as well as filtering of spurious harmonics.

Demountable connectors with L-shaped plugs for multiple fibers were produced by precision transfer molding using improved phenolic resin. They showed a low connecting loss of 0.48 dB and sufficient stability to withstand the ambient temperature variation.

The finite-element method is adapted to handle scattering from periodic structures. The formalism developed by us treats both TE and TM waves in a unified form. The validity of the method is confirmed by comparing numerical results with the earlier theoretical results.

By psychological measurements, data of two kinds of subjective judgements--perceptual and cognitive judgements--for Kanji and Kanji-like patterns were obtained, and it was shown that two stages of information processing--perception and cognition--in human pattern recognition has different functions respectively.

A new many-valued JK type flip-flop is proposed. Many-valued sequential machines are designed by different types of many-valued flip-flops to compare their costs.