We demonstrate the construction of corrugated waveguides using stacked rings to propagate terahertz frequencies. The waveguide allows propagation of the same fundamental mode as an optical-fiber, namely, the HE(11) mode. This simple concept opens the way for corrugated wave-guides up to several terahertz, maintaining beam characteristics as for terahertz applications.

A measure differential inclusion (MDI) based modeling approach for rigidbody mechanical systems will be introduced, that can exhibit autonomous or controlled mode transitions, accompanied by discontinuities on velocity and acceleration level. The hybrid optimal control necessitates the consideration of an uncommon concept of control, namely, controls of unbounded, impulsive and set-valued type....

In our case study we look at one of the early papers that interrelates the concept of fuzzy set inclusion, power set and many-valued implication operators, namely the paper of Bandler and Kohout [3]. This is followed by discussion of the subsequent related work by the fuzzy community.

This paper analyses the performance of a genetic algorithm using a new concept, namely a fractional-order dynamic fitness function, for the synthesis of combinational logic circuits. The experiments reveal superior results in terms of speed and convergence to achieve a solution. Keywords— Circuit Design, Fractional-Order Systems, Genetic Algorithms, Logic Circuits.

this study seeks to describe and discuss a hemistich, namely ‘‘yours the earth, mine the vulture’s feather’’, of the story of rostam and sohrab in ferdowsi's shahnameh. many commentators and interpreters of the shahnameh have different opinions on the concept and meaning of this hemistich. this has led the researchers to seek the reason of such differences, clues for the provided meanings,...

Given its eminent role in student learning and development, it is important to understand how academic self-concept (i.e., how one perceives oneself in an academic context) is formed. Both internal and external comparisons are considered crucial antecedents: Students form their academic self-concept to a considerable extent by (externally) comparing themselves with others and by (internally) co...

The present study carries out output-only modal analysis using two blind source separation (BSS) techniques, namely independent component analysis and second-order blind identification. The concept of virtual source is exploited and renders the application of these BSS techniques possible. The proposed modal analysis method is illustrated using numerical and experimental examples. r 2007 Elsevi...

In an infinite network, we introduce the notion of flux which is an important concept in the study of many physical problems. The basic tool needed, namely the discrete version of the Green’s formula, is proved here in a generalized form.

This paper analyses the performance of a genetic algorithm using a new concept, namely a fractional-order dynamic fitness function, for the synthesis of combinational logic circuits. The experiments reveal superior results in terms of speed and convergence to achieve a solution. Keywords— Circuit Design, Fractional-Order Systems, Genetic Algorithms, Logic Circuits.

The concept of metagrammar has been introduced to factorize information contained in a grammar. A metagrammar compiler can then be used to compute an actual grammar from a metagrammar. In this paper, we present a new metagrammar compiler based on 2 important concepts from logic programming, namely (1) the Warren’s Abstract Machine and (2) constraints on finite set.