The phase of a signal conveys critical information for signal interpretation. However, signal phase extraction is not a straightforward process, mainly due to the discontinuities appearing in the phase spectrum. Previously, it was shown that for the application of audio classification, in case features of the processed phase spectrum are combined with magnitude related features they provide hig...

Sensitivity studies of the recent new data on O(D) quantum yields in O3 Hartley band photolysis in the stratosphere N. Taniguchi, S. Hayashida, K. Takahashi, and Y. Matsumi Faculty of Science, Nara Women’s University, Kitauoya-Nishimachi, Nara, 630-8506, Japan Solar-Terrestrial Environment Laboratory, Nagoya University, Honohara 3–13, Toyokawa, 442-8507, Japan Received: 3 February 2003 – Accept...

The history of RIPs, especially the toxic ones, has been well reviewed recently. This present chapter will summarize the research steps that in the last 40 years have led to significant advancements in the knowledge of these proteins, of their mechanism of action, and of their possible practical applications in medicine and in agriculture. Ribosome-inactivating proteins (RIPs), initially discov...

Sparse recovery aims to reconstruct signals that are sparse in a linear transform domain from a heavily underdetermined set of measurements. The success of sparse recovery relies critically on the knowledge of transform domains that give compressible representations of the signal of interest. Here we consider twoand three-dimensional images, and investigate various multi-dimensional transforms ...

Finding the spectrum of a signal swiftly has been an ever-growing demand in Digital Signal Processing. In quest to meet this stipulation, Discrete Hartley Transform (DHT) is becoming as an encouraging substitute to the more popular discrete Fourier transform. Fast methods to compute the DHT are in existence and are named as fast Hartley transforms (FHTs). In this thesis, a new split-radix FHT a...

The Dunkin Hartley (DH) guinea pig is a widely used naturally occurring osteoarthritis model. The aim of this study was to provide detailed evidence of age-related changes in articular cartilage, subchondral bone mineral density, and estradiol levels. We studied the female Dunkin Hartley guinea pigs at 1, 3, 6, 9, and 12 months of age (eight animals in each group). Histological analysis were us...

We have developed a parallel, pipelined architecture for calculating the Fast Hartley Transform. Hardware implementation of the FHT introduces two challenges: retrograde indexing and data scaling. We propose a novel addressing scheme that permits the fast computation of FHT butterflies, and describe a hardware implementation of conditional block floating point scaling that reduces error due to ...

1.1 We prove that: Over any field I of characteristic p > 0, there exists an infinite dimensional Lie algebra which is the join of two (p + l)-dimensional and nilpotent (of class exactly p) subideals. A result of Hartley ([2; p. 259, theorems 2 and 5]) states that over any field of characteristic zero, the join of a pair of finite dimensional (resp. finite dimensional and nilpotent) subideals i...

In this article, we deal with fast algorithms for the quater-nionic Fourier transform (QFT). Our aim is to give a guideline for choosing algorithms in practical cases. Hence, we are not only interested in the theoretic complexity but in the real execution time of the implementation of an algorithm. This includes oating point multiplications, additions, index computations and the memory accesses...