*Correspondence: [email protected] Mathematics Department, Faculty of Science, Damietta University, New Damietta, Egypt Abstract In this paper we determine the fine spectrum of the generalized difference operator a,b defined by a lower triangular double-band matrix over the sequence space c0. The class of the operator a,b contains as special cases many operators that have been studied recent...

We present an interactive system for computer aided generation of line art drawings to illustrate 3D models that are given as triangulated surfaces. In a preprocessing step an enhanced 2D view of the scene is computed by sampling for every pixel the shading, the normal vectors and the principal directions obtained from discrete curvature analysis. Then streamlines are traced in the 2D direction...

This paper addresses the on-going debate over the distinction between Agreement by Correspondence (Hansson 2001; Rose and Walker 2004; a.o.) and the previously dominant theory of autosegmental feature spreading, focusing on a key conceptual difference between the two theories: the role of similarity as the basis of harmony patterns. It is argued that Agreement by Correspondence’s unique ability...

Disyllabic sequences in Shanghai Wu undergo different types of tone sandhi depending on their syntactic structure: modifier-noun compounds spread the initial tone across the disyllable, while verb-noun phrases often maintain the final tone and neutralize the nonfinal tone, especially if the phrase has a low frequency of occurrence. We investigated the productivity of the two tone sandhi types t...

This paper provides an analysis of a log detector in order to determine its response to a multi-tone input for detection of spurious emissions in a radio frequency transmitter. Treatment is given to the single tone response of the log detector and extended to a two-tone log detector system, where a large signal and a small signal are present. The large signal is observed to experience logarithm...

All non-equivalent circulant D-optimal designs for n ~-2 mod 4, n ~< 54 and n = 66 are given and were found by an exhaustive search. There is a unique non-equivalent circulant design for each value of n ~< 18, 3 for n = 26 and n = 30, 8 for n = 38, 31 for n = 42, 17 for n = 46, 39 for n = 50, 48 for n = 54, and 1025 for n = 66. These are presented in tables in the form of the corresponding non-...

This paper deals with obtaing necessary and sufficient conditions for the existence of at least one Ψ-bounded solution for the non-homogeneous matrix difference equation X(n+1) = A(n)X(n)B(n)+F (n), where F (n) is a Ψ-bounded matrix valued function on Z+. Finally, we prove a result relating to the asymptotic behavior of the Ψ-bounded solutions of this equation on Z+.

Results from 3 auditory tasks revealed that small changes made in stimuli commonly encountered in everyday life are more easily discriminated than are the same changes made in stimuli not as commonly encountered. The tasks required discrimination of a frequency difference in 1 tone of 6-tone chords or nonchords, discrimination of a duration difference in 1 note of common tunes or nontunes, and ...

Two modified go/no-go tasks are compared for the measurement of frequency discrimination in albino rats. The first task required detection of an instantaneous, phase-matched frequency change, called a "tone-step," within a continuous reference tone. The more traditional second task required detection of a frequency change between repetitions of a reference sequence of repeating discrete tones. ...

The present study adopts phonetic experiment to systematically investigate the citation tone and tone sandhi patterns of Liaocheng and Tai’an dialect. It aims to provide empirical data for the theoretical analysis and explore the diversities of tonal phenomenon within Shandong (Hereinafter, as SD) dialect. Results demonstrate that both of these two dialects have four citation tones, i.e., Tone ...