The fundamental bands of the CCl3 asymmetric deformation modes of selected isotopomers of chloroform (CHCl3) and freon-11 (CFCl3) have been measured in a static cell at ambient temperature using a laser-based source of tunable radiation in the terahertz region of the electromagnetic spectrum. The analysis of the rotational contours of the bands enabled the derivation of the fundamental frequenc...

In this paper, an advance repetitive control method (RCM) for fuzzy current control based grid connected inverter with a frequency adaptive capability is proposed. The main objective of the proposed scheme is to reduce total harmonic distortion (THD) such that by changing the FIR filter according to varied grid frequency and keeps the resonant frequencies fitting the grid fundamental and harmon...

This study examined the relationship between the activation phase of cone phototransduction and the flicker electroretinogram (ERG) in 15 patients with retinitis pigmentosa (RP) and 12 age-equivalent, visually normal control subjects. Values of Rmp3 (maximum amplitude of P3, the massed cone photoreceptor response) and S (sensitivity of cone phototransduction) were derived from a delayed Gaussia...

background: the human leukocyte antigen-drb1 (hla-drb1) locus is one of the most polymorphic human loci and has a crucial role in the immune system. assessing the allelic frequencies of hla-drb1 locus would be a fundamental factor in defining the origin of populations, relationships with other populations, disease association studies and the constitution of unrelated bone marrow donor registrie...

The effect of inharmonicity on pitch was measured by listening tests at five fundamental frequencies. Inharmonicity was defined in a way typical of string instruments, such as the piano, where all partials are elevated in a systematic way. It was found that the pitch judgment is usually dominated by some other partial than the fundamental; however, with a high degree of inharmonicity the fundam...

Previous second-harmonic-generation experiments on metallic split-ring-resonator arrays have been performed at fixed fundamental laser center frequency. Here, we perform nonlinear optical spectroscopy on a first set of samples, revealing pronounced resonances. Furthermore, to clarify the role of higher-order split-ring resonances, we perform additional experiments on a second set of samples in ...

The effect of inharmonicity on pitch was measured by listening tests at four fundamental frequencies. Inharmonicity was defined in a way typical of string instruments, such as the piano, where all partials are elevated in a systematic way. It was found that the pitch judgment is usually dominated by some other partials than the fundamental; however, with a high degree of inharmonicity, the fund...

The changes in the male voice in relation to the biological characteristics of puberty were assessed longitudinally in 26 boys. Speaking and singing fundamental frequencies were analysed in relation to the Tanner staging of puberty, saliva testosterone levels, and the Cooksey classification of voice analysis. There were abrupt changes in voice characteristics between Tanner stages G3 and G4 and...

The aim of the article is to present a method for estimating the modulation frequency and modulation level owing to micro-tremor of the vocal fundamental frequency. Vocal micro-tremor designates the modulation of the fundamental frequency of the voice source signal owing to physiological tremor of normal speakers. The analysis is based on the spectral density function of the time series of the ...

An accurate fundamental frequency (F0) estimation method for non-stationary, speech-like sounds is proposed based on the differential properties of the instantaneous frequencies of two sets of filter outputs. A specific type of fixed points of mapping from the filter center frequency to the output instantaneous frequency provides frequencies of the constituent sinusoidal components of the input...