Areas of Research
I am interested in IR (Information Retrieval) and distributed databases. Specifically, my research focuses on algorithms for distributed databases, Top-k query processing, and managing data in unstructured topologies. I have compiled a short list of topics I am currently researching and a short description for each of them.
P2P (Peer-to-Peer) Databases
A peer-to-peer (or P2P) computer network is a network that relies on the computing power and bandwidth
of the participants in the network rather than concentrating it in a
relatively few servers. P2P networks are typically used for connecting
nodes via largely ad hoc connections. Such networks are useful for many purposes. Sharing content files (see file sharing) containing audio, video, data or anything in digital format is very common, and realtime data, such as telephony traffic, is also passed using P2P technology.
The term "P2P network" can also mean grid computing.
A pure peer-to-peer file transfer network does not have the notion of clients or servers, but only equal peer nodes
that simultaneously function as both "clients" and "servers" to the
other nodes on the network. This model of network arrangement differs
from the client-server
model where communication is usually to and from a central server. A
typical example for a non peer-to-peer file transfer is an FTP
server. One user uploads a file to the FTP server, then many others
download it, with no need for the uploader and downloader to be
connected at the same time.
Some networks and channels, such as Napster, OpenNAP, or IRC @find, use a client-server structure for some tasks (e.g., searching) and a peer-to-peer structure for others. Networks such as Gnutella or Freenet
use a peer-to-peer structure for all purposes, and are sometimes
referred to as true peer-to-peer networks, although Gnutella is greatly
facilitated by directory servers that inform peers of the network
addresses of other peers.
Peer-to-peer architecture embodies one of the key technical concepts of the internet, described in the first internet Request for Comments, "RFC 1, Host Software"  dated 7 April 1969.
More recently, the concept has achieved wide prominence among the
general public in the context of the absence of central indexing servers in architectures used for exchanging multimedia files.