Past Research

Human Microbiome: Inferring function from phylogeny

I was a post-doc funded by the Canadian Human Microbiome Initiative on "Modelling and mapping microbial diversity and function with marker genes, genomes and metagenomes" led by Dr. Ford Doolittle with direct supervision by co-PI Dr. Robert Beiko. This research focused on better understanding the microbiome as a community, which led to the development of a novel and widely used new computational tool for inferring "virtual metagenomes" from 16S data, called PICRUSt

Environmental Metagenomics

During my first post-doc I was a member of the iSEEM research group supported by the Moore Foundation led by Dr. Jonathan Eisen for improving computational methods for metagenomics data. This included building databases of completed genomes (MicrobeDB) and protein families (SFams), as well as applying a data reduction technique called Non-Negative Matrix Factorization for the first time on a metagenomic dataset from the ocean.

Phylogenomics of Halophiles

Participated in the analysis of 8 haloarchaea genomes led my Marc Facciotti at UC Davis. This research was published in PLoS ONE PLoS ONE.

Open Science: BioTorrents

In general, I am interested in large datasets and improving the accessibility of results, software, and datasets in science. To improve the transfer speeds of data I developed BioTorrents, a website that allows open sharing of scientific data using the popular peer-to-peer BitTorrent sharing program. A manuscript describing BioTorrents was published in PLoS One.

Genomic Islands

My PhD research was focused on identifying and characterizing genomic islands (GIs). GIs are large regions (8-250 kb) that are thought to have been horizontally transferred in bacterial genomes. GIs are often linked to pathogenicity, antibiotic resistance, and adaptation to particular environments. During this research project I developed a novel GI prediction program, called IslandPick, that uses comparative genomics for GI identification. After evaluating the accurary of several other GI prediction programs, I incorporated the most accurate methods into a single comprehensive website for GI prediction called IslandViewer. I also was involved in a collaborative project for the annotation and identification of GIs in a particular virulent strain of Pseudomonas aeruginosa. I also describe some interesting relationships between GIs, CRISPRs, and phage. All of these are projects are outlined in my PhD thesis.

Standards development for flow cytometry data

My PhD program included research rotations before choosing a PhD supervisor for the remainder of my thesis research. One of these rotations was spent on developing standards for flow cytometry. I learned quite a bit about ontology development (OWL) and file specifications using XML and XSLT. More information is in the publication.

Medical image segmentation algorithms

I dabbled in the field of medical image analysis, while taking an elective course with Dr. Hamarneh during the start of my PhD. This research was focused on developing new segmentation algorithms (think magic wand tool in Photoshop) in 2D and 3D MRI images. This gave me a crash course in learning Matlab and C. The specifics on the research can be found in two publications: here and here.

Gene duplication in Drosophila

While completing my concurrent undergraduate Bachelor's of Science and Bachelor's of Computer Science degrees at UNB, I worked for two summers with Dr. Clark on identifying retrotransposed (DNA->RNA->DNA) gene duplications in Drospophila melanogaster and looking at gene expression differences between the parent and child copies using microarray data. More information about this project is explained in the publication.