In this paper, we give an algorithm to compute the hat version of the Heegaard Floer homology of a closed oriented three-manifold. This method also allows us to compute the filtrations coming from a null-homologous link in a three-manifold.
Predictive video codecs such as MPEG and H.26x are very susceptible to prediction mismatch between encoder and decoder or "drift" when there are packet losses, leading to a significant reduction in the decoded quality. In this paper, we propose a method to reduce the drift in these codecs by sending extra information over a side-channel. Using principles… (More)
In this paper, we give an algorithm to compute the hat version of the Heegaard Floer homology of a 3-manifold. This method also allows us to compute the filtrations coming from a knot in a 3-manifold.
While BitTorrent has been successfully used in peer-to-peer content distribution, its performance is limited by the fact that typical internet users have much lower upload bandwidths than download bandwidths. This asymmetry in bandwidth results in the overall average download speed of a BitTorrent-like file down-load system to be bottle-necked by the much… (More)
—We investigate the design of fountain codes with good intermediate performance and built-in unequal error protection for low-delay video multicast. In particular, we design novel short-blocklength fountain codes for media streaming applications to multiple heterogeneous receivers and analyze their performance. Our theoretical contribution is the… (More)
Peer-to-peer (P2P) content distribution is able to greatly reduce dependence on infrastructure servers and scale up to the demand of the Internet video era. However, the rapid growth of P2P applications has also created immense burden on service providers by generating significant ISP-unfriendly traffic, such as cross-ISP and inter-POP traffic. In this… (More)
The throughput of Peer-to-Peer (P2P) Video-on-Demand (VoD) systems is typically capped by the users' aggregate upload bandwidth . The drastic increase in the popularity of VoD and the demand of higher quality content has thus placed substantial burden on the content servers. We investigate a novel P2P VoD architecture that leverages idle internet… (More)
Antimicrobial peptides (AMPs), which present in the non-specific immune system of organism, are amongst the most promising candidates for the development of novel antimicrobials. The modification of naturally occurring AMPs based on their residue composition and distribution is a simple and effective strategy for optimization of known AMPs. In this study, a… (More)
This paper addresses the problem of low-latency robust video delivery over packet networks characterized by a bursty loss process. We propose a joint source-channel coding based video codec which uses distributed source coding (DSC) principles. This codec can efficiently tune to both the source content as well as to the network loss characteristics while… (More)