Arun Rangarajan

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WormBase ( is a central data repository for nematode biology. Initially created as a service to the Caenorhabditis elegans research field, WormBase has evolved into a powerful research tool in its own right. In the past 2 years, we expanded WormBase to include the complete genomic sequence, gene predictions and orthology assignments(More)
Since its release in 2000, WormBase ( has grown from a small resource focusing on a single species and serving a dedicated research community, to one now spanning 15 species essential to the broader biomedical and agricultural research fields. To enhance the rate of curation, we have automated the identification of key data in the(More)
WormBase (, a model organism database for Caenorhabditis elegans and other related nematodes, continues to evolve and expand. Over the past year WormBase has added new data on C.elegans, including data on classical genetics, cell biology and functional genomics; expanded the annotation of closely related nematodes with a new genome(More)
The overarching goal of the NIF (Neuroscience Information Framework) project is to be a one-stop-shop for Neuroscience. This paper provides a technical overview of how the system is designed. The technical goal of the first version of the NIF system was to develop an information system that a neuroscientist can use to locate relevant information from a wide(More)
Textpresso is a text-mining system for scientific literature. Its two major features are access to the full text of research papers and the development and use of categories of biological concepts as well as categories that describe or relate objects. A search engine enables the user to search for one or a combination of these categories and/or keywords(More)
We are interested in restoring a degraded scene while preserving the edges. Edges are represented as line pr& cesses and are estimated along with the intensities in a Maximum A Posien'ori (MAP) framework. Aasumptions regarding the prior and degradation distributions reduce the problem to one of energy function minimization. The energy function is highly(More)
Journal articles and databases are two major modes of communication in the biological sciences, and thus integrating these critical resources is of urgent importance to increase the pace of discovery. Projects focused on bridging the gap between journals and databases have been on the rise over the last five years and have resulted in the development of(More)
We analyze optimum (space–time) adaptive power transmission policies for Rayleigh fading MIMO channels when CSIT and CSIR are available. We show that our power allocation policy provides exponential diversity gain2 (BER ≤ αe−f(nt,nr), where α > 0 is a constant, and f > 0 is an increasing function of nt & nr) if perfect CSIT is available. Exponential(More)
The Gaussian approximation has been used to study iterative decoding algorithms of graph-based codes like turbo codes [7, 8] and low-density parity check (LDPC) codes [6]. In this work, the Gaussian approximation is used to describe the turbo decoding algorithm (TDA) as an elegant discrete dynamical system and explicit iterative equations for the evolution(More)