Measurements of oxygen uptake and blood lactate content are central to methods for assessment of physical fitness and endurance capabilities in athletes. Two important parameters extracted from such data of incremental exercise tests are the maximal oxygen uptake and the critical power. A commonly accepted model of the dynamics of oxygen uptake during exercise at constant work rate comprises a ...

A modulation system is proposed that continuously adjusts its data rate in response to signal strength variations in a fading channel. The optimum variation of data rate with channel conditions is determined, and includes the effects of feedback channel time delay, the interval between rate changes, and restriction of the number of allowable rates. Application of these results to a full duplex ...

A shaper is a system that stores incoming bits in a bu er and delivers them as early as possible, while forcing the output to be constrained with a given arrival curve. A shaper is time invariant if the tra c constraint is dened by a xed arrival curve; it is time varying if the condition on the output is given by a time varying tra c contract. This occurs, for example, with renegotiable variabl...

We consider streaming of video sequences over both, constant and variable bitrate (VBR) channels. Our goal is to enable decoding of each video unit before exceeding its displaying deadline and, hence, to guarantee successful sequence presentation even if the media rate does not match the channel rate. In this work, we will show that the separation between a delay jitter buffer and a decoder buf...

An adaptive coding scheme is introduced for a discrete sequence code-division multiple-access system. The system uses noncoherentM -ary orthogonal modulation with RAKE receiver and power control. Both a fast fading channel and a combined fast fading, shadowing and power control channel are considered. Analytical bounds and simulations are done to evaluate the performance of the system. It is fo...

Emerging wireless applications have created a strong motivation to increase the throughput of wireless communication systems. Space-time coding has become a promising method to achieve high data rates. In this work, we propose a space-time trellis code construction method that can provide variable protection against the adverse effects of the radio channel. The method is based on the multiple t...

A variable bit rate encoding method for JPEG2000 is presented. The method is suitable for encoding digital cinema content. All bit rate constraints described in the DCI Digital Cinema System Specification are satisfied. At the same time, average peak signal-to-noise ratio is maximized subject to these constraints. The encoder first creates high rate codestreams that satisfy the constraints. The...

We demonstrate the use of a Diierential Vector Quantization (DVQ) architecture for the coding of digital images. An Artiicial Neural Network (ANN) is used to develop entropy-biased codebooks which yield substantial data compression without entropy coding and are very robust with respect to transmission channel errors. We discuss how these codebooks can be used to realize variable bit-rate coder...

In driving simulation, simulator tilt is used to reproduce linear acceleration. In order to feel realistic, this tilt is performed at a rate below the tilt-rate detection threshold, which is usually assumed constant. However, it is known that many factors affect the threshold, like visual information, simulator motion in additional directions, or active vehicle control. Here we investigated the...

We have recently introduced an incremental learning algorithm, Learn.NSE, for Non-Stationary Environments, where the data distribution changes over time due to concept drift. Learn.NSE is an ensemble of classifiers approach, training a new classifier on each consecutive batch of data that become available, and combining them through an age-adjusted dynamic error based weighted majority voting. ...