INTRODUCTION Impaired heart rate variability (HRV) is associated with poor outcome in diabetic patients. The present prospective study compared spectral components of HRV obtained by either fast Fourier transform (FFT) or autoregressive (AR) analyses in diabetic patients. METHODS Thirty patients (49+/-12 years; 11 F/19 M; 60% with insulin-dependent type 1 diabetes) underwent 24-h ambulatory e...

This paper is concerned with fast Fourier transform (FFT) approach to option valuation, where the underlying asset price is governed by a regime-switching geometric Brownian motion. An FFT method for the regime-switching model is developed first. Aiming at reducing computational complexity, a near-optimal FFT scheme is proposed when the modulating Markov chain has a large state space. To test t...

Background: Multisystemic Therapy (MST) and Functional Family (FFT) are evidence-based Blueprint programs shown to be effective towards youth problem behaviors. Purpose: The present study aimed investigate treatment outcomes following MST FFT among Norwegian youths with serious behavior problems. Research design: Routine Outcome Monitoring (ROM) data of the Youth Level Service/Case Management I...

Fast Fourier Transform (FFT) plays an important role in the field of digital signal processing. High performance FFT processors are widely used in different application, such as speech processing, image processing, and communication system. In this paper, we proposed a novel register array based low power FFT processor for Mel Frequency Cepstral Coefficient (MFCC). Compared with [9-12], this no...

The discovery of the fast Fourier transform (FFT) algorithm and the subsequent development of algorithmic and numerical methods based on it have had an enormous impact on the ability of computers to process digital representations of signals, or functions. At first, the FFT was regarded as entirely new. However, attention and wide publicity led to an unfolding of its pre-electronic computer his...

This evaluation compared the efficiency and effectiveness of Functional Family Therapy-Child Welfare (FFT-CW®, n=1625) to Usual Care (UC: n=2250) in reducing child maltreatment. FFT-CW® is a continuum of care model based on the family's risk status. In a child welfare setting, families received either UC or FFT-CW® in a quasi-experimental, stepped wedge design across all five boroughs of New Yo...

The fast Fourier transform (FFT) is the cornerstone of many supercomputer applications and therefore needs careful performance tuning. Most often, however, the real performance of the FFT implementations is far below the acceptable figures. In this paper, we explore several strategies for performance optimisations of the FFT computation, such as enhancing instruction-level parallelism, loop mer...

The split-radix FFT computes a size-n complex DFT, when n is a large power of 2, using just 4n lgn−6n+8 arithmetic operations on real numbers. This operation count was first announced in 1968, stood unchallenged for more than thirty years, and was widely believed to be best possible. Recently James Van Buskirk posted software demonstrating that the split-radix FFT is not optimal. Van Buskirk’s ...

In this experiment we are asked to compress discrete time data by storing only the most significant points of the data's FFT. If every point in the FFT is stored, it is possible to recover the original signal exactly. But by effectively zeroing out less significant points in the FFT, we elect to introduce some error into the reconstructed signal in order to reduce the amount of storage space. T...