Objectives: To assess the prevalence of Candida carriage rate in denture wearers and to evaluate the effects of local factors and habits of tobacco and betelnut on Candida carriage rate. Study design: 60 edentulous subjects and 60 dentulous subjects were evaluated. Standard methods for culture, salivary flow rates and pH determination were used. Statistically analysis was carried out using Stud...

Această lucrare prezintă implementarea algoritmului FFT (Cooley-Tukey) intens utilizat la reconstrucţia imaginilor RMN pe o maşină revoluţionară de calcul paralel, Connex Array. Valorificând structura şi prelucrarea vectorială a informaţiilor in Connex Array, reconstrucţia unei imagini RMN s-a facut mult mai rapid decat în majoritatea scanerelor comerciale. Rezultatele sunt remarcabile. Propune...

Magnetic resonance spectroscopy (MRS) is used to determine the quantity of metabolites, such as creatine phosphate (PCr) and adenocine triphosphate (ATP), in the living body by collecting their nuclear magnetic resonance (NMR) spectra. In the field of MRS, the frequency spectrum of metabolites is usually obtained by applying the fast Fourier transform (FFT) (Cooley & Tukey, 1965) to the NMR sig...

We present a fast online clustering algorithm which has linear worst-case time complexity and constant running time average for the well-known online visually oriented browsing modeling called Scatter/Gather browsing (Cutting, Karger, Pedersen, and Tukey 1992). Our experiment shows when running on a single processor, this fast online clustering algorithm is few hundred times faster than the par...

The DDα-procedure is a fast nonparametric method for supervised classification of d-dimensional objects into q ≥ 2 classes. It is based on q-dimensional depth plots and the α-procedure, which is an efficient algorithm for discrimination in the depth space [0, 1] . Specifically, we use two depth functions that are well computable in high dimensions, the zonoid depth and the random Tukey depth, a...

For a broad class of jackknife statistics, it is shown that the Tukey estimator of the variance converges almost surely to its population counterpart. Moreover, the usual invariance principles (relating to the Wiener process approximations) usually filter through jackknifing under no extra regularity conditions. These results are then incorporated in providing a bounded-length (sequential) conf...

Methods A single-center cohort study of all consecutive patients <18 years of age with biopsy proven LN diagnosed in 1980–2006 was performed. Self-designated ethnicity, clinical and laboratory features including renal function, urinalysis and overall activity (SLEDAI) were recorded. Associations of ethnicities, LN subtypes, clinical and laboratory variables were tested using chi-squared analysi...

A low power 64-point FFT/IFFT architecture is developed for the application in OFDM based wireless broadband communication system. The proposed architecture satisfies the specifications of IEEE 802.11a and ETSI Bran. The architecture requires 25% multiplication and 86% addition/subtraction operation compared to the conventional Cooley-Tukey approach. This leads to power and area saving as well....

The linear canonical transform provides a mathematical model of paraxial propagation though quadratic phase systems. We review the literature on numerical approximation of this transform, including discretization, sampling, and fast algorithms, and identify key results. We then propose a frequency-division fast linear canonical transform algorithm comparable to the Sande-Tukey fast Fourier tran...