Shajid Islam

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In this paper, we have designed rectangular waveguides with discontinuities to analyze and improve their performance by using finite element solution method. Mathematical formulation is shown for the transverse electric mode for analyzing the waveguides. The analyses of some other wave properties (both electric and magnetic) of the designed rectangular(More)
A completely new scheme for quaternary logic is proposed. Instead of conventional Fuzzy logic or Galois Field theory, the logic system is based on the extension of Boolean algebra. The logic is capable of handling both quaternary and coupled-binary inputs, where binary operands are coupled in pairs to form quaternary entities. All necessary operators are(More)
Rhythm is one of the fundamental elements of music. Each piece of music follows a rhythm. It might be observed that music of various regions differ from each other. A basic question is-what are the underlying properties of music that cause this difference? In this paper, first we study mathematical representation of rhythms of various regions. And then we(More)
Using a novel quaternary algebra, several sequential circuits are designed. The quaternary logic scheme used here is obtained by extending Boolean algebra into quaternary domain. A set of operators capable of handling both coupled-binary and ordinary inputs are used to design the sequential circuit elements such as latches, flip-flops, registers and(More)
Pitch and formant are two of the most important characteristics of voice signals. These features can be analyzed to detect the condition of patients having Obstructive Sleep Apnea Syndrome (OSAS) and Unilateral Vocal Cord Paralysis (UVCP) before or after treatment. In this paper, we propose a method to determine whether the patients have healed from the(More)
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