V. Roychowdhury

Publications
Influence

Network component analysis: Reconstruction of regulatory signals in biological systems

J. Liao, Riccardo Boscolo, Young-Lyeol Yang, Linh M. Tran, C. Sabatti, V. Roychowdhury
Medicine, Computer Science
Proceedings of the National Academy of Sciences…
12 December 2003

We develop a method, called network component analysis, for uncovering hidden regulatory signals from outputs of networked systems, when only a partial knowledge of the underlying network topology is available. Expand

A New Proof for the Existence of Mutually Unbiased Bases

S. Bandyopadhyay, P. Boykin, V. Roychowdhury, Farrokh Vatan
Mathematics, Computer Science
Algorithmica
29 March 2001

We develop a strong connection between maximally commuting bases of orthogonal unitary matrices and mutually unbiased bases. Expand

Task Matching and Scheduling in Heterogenous Computing Environments Using a Genetic-Algorithm-Based Approach

Lee Wang, H. Siegel, V. Roychowdhury, A. A. Maciejewski
Computer Science
J. Parallel Distributed Comput.
25 November 1997

A genetic algorithm-based heuristic approach based on a genetic algorithm is developed to do matching and scheduling in HC environments. Expand

Independent component analysis based on nonparametric density estimation

Riccardo Boscolo, H. Pan, V. Roychowdhury
Mathematics, Computer Science
IEEE Transactions on Neural Networks
2004

We introduce a novel nonparametric independent component analysis (ICA) algorithm, which is truly blind to the particular underlying distribution of the mixed signals. Expand

Transcriptome-based determination of multiple transcription regulator activities in Escherichia coli by using network component analysis.

K. Kao, Young-Lyeol Yang, Riccardo Boscolo, C. Sabatti, V. Roychowdhury, J. Liao
Biology, Medicine
Proceedings of the National Academy of Sciences…
13 January 2004

Cells adjust gene expression profiles in response to environmental and physiological changes through a series of signal transduction pathways. Upon activation or deactivation, the terminal regulators… Expand

Optimal encryption of quantum bits

P. Boykin, V. Roychowdhury
Physics
16 March 2000

We show that $2n$ random classical bits are both necessary and sufficient for encrypting any unknown state of n quantum bits in an informationally secure manner. We also characterize the complete set… Expand

Leveraging social networks to fight spam

P. Boykin, V. Roychowdhury
Computer Science
Computer
1 April 2005

Social networks are useful for judging the trustworthiness of outsiders. Expand

Covariance selection for nonchordal graphs via chordal embedding

J. Dahl, L. Vandenberghe, V. Roychowdhury
Mathematics, Computer Science
Optim. Methods Softw.
1 August 2008

We describe algorithms for maximum likelihood estimation of Gaussian graphical models with conditional independence constraints. Expand

Discrete Neural Computation: A Theoretical Foundation

Kai-Yeung Siu, V. Roychowdhury, T. Kailath
Mathematics
1995

1. Introduction. 2. Linear Threshold Element. 3. Computing Symmetric Functions. 4. Depth Efficient Arithmetic Circuits. 5. Depth-Size Tradeoffs. 6. Computing with Small Weights. 7. Rational… Expand

Scale-free and stable structures in complex ad hoc networks.

N. Sarshar, V. Roychowdhury
Mathematics, Physics
Physical review. E, Statistical, nonlinear, and…
3 March 2003

Unlike the well-studied models of growing networks, where the dominant dynamics consist of insertions of new nodes and connections and rewiring of existing links, we study ad hoc networks, where one… Expand

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