We present a method for generating linearized images that consist of only diffuse reflection from images taken under near point light sources. Previous photometric linearization method cannot work under near point light sources, since it assumes parallel light. For satisfying this assumption, our method utilizes a photometric linearization method by dividing images into small regions. It also s...

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This paper gives an analysis of operation of a self-phased array under conditions of multipath propagation (either reflections or jamming signals). A general method for the calculation of directivity of such an array has been proposed. Influence of reflections by way of the pilot signal channel as well as by way of the primary signal channel is taken into account. Some limitations of the approa...

This paper presents an investigation of a pilot signal influence on directivity of self-phased array under conditions of multipath propagation (either reflections or jamming signals). A suggestion is made that an average reduction in directivity owing to the cutting off (or “dropping out”) of some channels of the array be used as a criterion of this influence. It has been shown that an essentia...

An exact solution is given for the reflection of a plane wave normally incident on a rigid solid with periodically spaced semi-infinite circular holes. Analytical considerations, verified by numerical calculations, show that the reflection coefficient isunity at the cutoff requencies defined by the periodicity of the holes. This result is independent of the volume fraction of the holes. It impl...

Several errors were found in our paper. In this erratum we provide the corrected expressions for surface susceptibilities and reflection and transmission coefficients. Using the corrected formulas we reproduce the main results of the work and discuss the obtained quantitative differences. In our paper we claimed that the factors 2 in front of the term χ ES were missed in formulas (9) and (10) o...

Acoustic metamaterials can be described by effective material properties such as mass density and modulus. We have developed a method to extract these effective properties from reflection and transmission coefficients, which can be measured experimentally. The dependency of effective properties on the positions of the boundaries of the acoustic metamaterial is discussed, and a proper procedure ...

Many philosophers have worried about what philosophy is. Often they have looked for answers by considering what it is that philosophers do. Given the diversity of topics and methods found in philosophy, however, we propose a different approach. In this article we consider the philosophical temperament, asking an alternative question: What are philosophers like? Our answer is that one important ...

The problem of terminating a transmission line that consists of a set of coupled loop resonators to support the propagation of magneto-inductive waves is considered. Since the ideal terminating impedance is not easily realisable end-reflections are generally obtained from such a line. Techniques are developed to calculate the reflection coefficient from a line terminated with a finite number of...