Masters Theses


Raghu Yelugam

Keywords and Phrases

Adaptive Resonance Theory; Biclustering; Coclustering; Gene expression clustering


”Detection of gene mutations is central for assessing genetic factors affecting disease predisposition, genetic causes of a particular disease, and gene-targeted treatment. DNA microarray methods are widely used to detect mutations by contrasting the expression levels of thousands of genes together under varying experimental conditions. The experimental conditions could be diseased cell states compared with the normal cell states. Biclustering, a robust exploratory data analysis tool, can be applied to microarray data to detect subsets of genes that co-express highly only for a subset of experimental conditions. Such detection is crucial for gaining insights into gene regulatory networks, differential gene expression, and gene-disease associations to identify candidate genes for further study. However, biclustering fails to identify functional associations between genes within a bicluster and group functionally related genes that might not co-express significantly.

This work presents a novel biclustering algorithm, TopoBARTMAP, which combines a biclustering ARTMAP (BARTMAP) with a topological ART (TopoART) to improve the quality of biclustering. Whilst producing a graphical representation of space, topological clustering can identify arbitrarily shaped clusters in space that are difficult to detect otherwise. These methods find application in analyzing disease-specific gene subgroups and disease progression. TopoBARTMAP inherits, from TopoART, the ability to detect arbitrarily shaped biclusters whilst remaining robust to noise. These capabilities of TopoBARTMAP are rigorously demonstrated in the study with 35 benchmark cancer datasets. Further, the benchmarking study underpins the statistically significant performance improvement observed in comparison to other compared methods. Using the breast cancer dataset containing expression levels of 39,326 genes observed over 38 samples, the graphical output of TopoBARTMAP is analyzed to detect intra-bicluster-gene associations within the dataset”--Abstract, page iv.


Wunsch, Donald C.

Committee Member(s)

Dagli, Cihan H., 1949-
Modares, Hamidreza


Electrical and Computer Engineering

Degree Name

M.S. in Computer Engineering


This research was sponsored by the Missouri University of Science and Technology Mary K. Finley Endowment and Intelligent Systems Center; the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brazil (CAPES) - Finance code BEX 13494/13-9; the Army Research Laboratory (ARL) and the Lifelong Learning Machines program from the DARPA / Microsystems Technology Office, and it was accomplished under Cooperative Agreement Number W911NF-18-2-0260.

Research Center/Lab(s)

Intelligent Systems Center


Missouri University of Science and Technology

Publication Date

Fall 2021

Journal article titles appearing in thesis/dissertation

  • TopoBARTMAP: Biclustering ARTMAP with or without topological methods in a blood cancer case study
  • TopoBARTMAP: Topological biclustering ARTMAP


x, 91 pages

Note about bibliography

Includes bibliographic references.


© 2021 Raghu Yelugam, All rights reserved.

Document Type

Thesis - Open Access

File Type




Thesis Number

T 11968

Electronic OCLC #