Robust video transmission over lossy channels and efficient video distribution over peer-to-peer networks

We propose a new model for the analysis of data transmission protocols in lossy communication networks. The overall goal of a data transmission protocol is to successfully transmit a message from the sender to the receiver. We study the performance of protocols in an adversarial setting where the loss pattern and latencies of packets are determined by an adversary. We advocate the modular decom...

with the rapid growth of indoor wireless communication systems, the need to accurately model radio wave propagation inside the building environments has increased. many site-specific methods have been proposed for modeling indoor radio channels. among these methods, the ray tracing algorithm and the finite-difference time domain (fdtd) method are the most popular ones. the ray tracing approach ...

This paper presents how the shape of a brass instrument can be optimized with respect to its intonation properties. The instrument is modeled using a hybrid method between a lossy one-dimensional transmission line analogy for the slowly flaring part of the instrument, and a two-dimensional finite element model for the rapidly flaring part. The optimization employs gradient-based algorithms, and...

We use the lossy electric transmission—line analog model of the vocal tract to study the acoustics of speech produced in a hyperbaric helium— oxygen atmosphere. The analysis extends previous work by including more completely the effects of the wall vibration, glottal, and radiation impedances, and by analyzing the formant bandwidths and amplitudes in addition to the formant frequencies. It show...

In the equivalent circuit model for the DDS originally presented no losses were explicitly included in the cell circuits or the manifold circuits. Damping via the manifolds was effected by imposing matching conditions (including the possibility of reflection) on the ends of the manifolds. In this paper we extend the circuit theory to include lossy circuit elements. We discuss and compare shunt ...