This paper provides a unique insight into the perceptions of leading Australian Radio Frequency Identification (RFID) suppliers/integrators regarding the present state and future of their industry, and barriers to more widespread adoption of the technology. Five (5) leading Australian suppliers/integrators with significant relevant industry 1 The Journal will permit the Author to use the Articl...

The standard ISO 12233 method for the measurement of spatial frequency response (SFR) for digital still cameras and scanners is based on the analysis of slanted-edge image features. The procedure, which applies a form edge-gradient analysis to an estimated edge spread function, requires the automated finding of an edge feature in a digital test image. A frequently-considered (e.g. ISO-13660, -1...

This contribution discusses the measurement intervals for the frequency offset and drift measurements for the Stratum 3 and 3E clocks. Expressions are obtained for the standard deviation of the measurement error, assuming the noise generation is either White Phase Modulation or Flicker Phase Modulation. The results are used to develop proposals for the frequency drift measurement interval in Se...

Communications Research Laboratory (CRL) has been conducting the development of a Cesium atomic fountain primary frequency standard. Cs atoms are collected in a MOT and in optical molasses. They are further cooled to 2μK by PGC, and launched to a height of 30cm above the microwave cavity by moving molasses method. The launched atoms interact with the microwave twice, going upward and downward, ...

The accurate resonance frequency of the transition (F, M ) = (4, 0) ++(3 , 0) in the ground state of cesium-l33 is expressed In the form of an operational equation f o r an atomic beam spectrometer. Emphasized are the terms in this equation which correct for the beam direction dependence and radiation field dependence of measured resonance frequencies: F where i and j refer to opposite beam dir...

A scheme for a terahertz frequency standard based on three-photon coherent population trapping in stored ions is proposed. Assuming the propagation directions of the three lasers obey the phase matching condition, we show that stability of few 10(-14) at 1 s can be reached with a precision limited by power broadening to 10(-11) in the less favorable case. The referenced terahertz signal can be ...

Recently, several theoretical proposals addressed the generation of an active optical frequency standard based on atomic ensembles trapped in an optical lattice potential inside an optical resonator. Using atoms with a narrow linewidth transition and population inversion together with a “bad” cavity allows us to realize the super-radiant photon emission regime. These schemes reduce the influenc...

A novel linear transform (LT) is proposed for frequency warping (FW) with standard filterbank based MFCC features. Here, we use the idea of spectral interpolation of [9] to perform a continuous warping in the log filterbank output domain, and incorporate both interpolation and warping into a single warped IDCT matrix. The new transformation matrix is thus mathematically simpler than in [9], and...

We report the realisation and preliminary study of a frequency standard using a fountain of laser cooled caesium atoms. Our apparatus uses a magneto-optical trap as a source of cold atoms and optical pumping to prepare the atoms in the correct state before they enter the microwave cavity.

[This corrects the article on p. 829 in vol. 105.].