Selected Publications by Haesun Park
2019

TopicSifter: Interactive search space reduction through targeted topic modeling,
Proceedings of the IEEE Conference on Visual Analytics Science and Technology 2019 (with H. Kim, D. Choi, B. Drake, and A. Endert) 
Learning joint Gaussian representations for movies, actors, and literary characters,
Proceedings of the AAAI Conference on Artificial Intelligence 2019 (with H. Kim, D. Katerenchuk, D. Billet, and B. Li)
2018

Hierarchical Community Detection via Rank2 Symmetric Nonnegative Matrix Factorization,
Computational Social Networks, to appear (with R. Du, D. Kuang, and B. Drake) 
MPIFAUN: An MPIbased framework for alternatingupdating nonnegative matrix factorization,
IEEE Transactions on Knowledge and Data Engineering, 303:544558, 2018 (with R. Kannan and G. Ballard) 
SUSTain:Scalable unsupervised scoring for tensors and its application to phenotyping
ACM SIG Conference on Knowledge Discovery and Data Mining (KDD18), London, UK, August 1923, 2018 (with I. Perros, E. Papalexakis, R. Vuduc, X. Yan, C. Defillippi, W. Sewart, and J. Sun ) 
PixelSNE: pixelaligned stochastic neighbor embedding for efficient 2D visualization with just enough precision,
EG/VGTC Conference on Visualization (EuroVis18), Brno, Czech Republic, June 48, 2018 (with M. Kim, M. Choi, S. Lee, J. Tang, and J. Choo) 
ExTopicTile: TileBased spatiotemporal visual analytics for anomalous event detection via ex clusive topic modeling on social media,
Proceedings of the ACM SIGCHI Conference (CHI18), Montreal, Canada, April 2126, 2018 (with M. Choi, S. Shin, J. Choi, S. Langevin, C. Bethune, P. Horne, N. Kronenfeld, R. Kannan, B. Drake, and J. Choo) 
CoDiNMF: Coclustering of directed graphs via NMF,
Proceedings of the AAAI Conference on Artificial Intelligence (AAAI18), 2018 (with W. Lim and R. Du) 
VisIRR: Visual Analytics for Information Retrieval
and Recommendation for largescale document data,
ACM Transactions on Knowledge Discovery from Data, 8:18:20, 2018 (with J. Choo, H. Kim, E. Clarkson, Z. Liu, C. Lee, F. Li, H. Lee, R. Kannan, C. Stolper, and J. Stasko). 
Integer matrix approximation and data mining,
Journal of Scientific Computing, 751: 198224, 2018 (with B. Dong and M. Lin) 
Outlier detection for text data,
Proceedings of the SIAM International Conference on Data Mining (SDM17), to appear. (with R. Kannan, H. Woo, and C. Aggarwal)
2017

Hybrid Clustering based on Content and Connection Structure using Joint Nonnegative Matrix Factorization
Journal of Global Optimization, pp.117, 2017, https://doi.org/10.1007/s108980170578x (with R. Du and B. Drake) 
STExNMF: SpatioTemporally Exclusive Topic Discovery for Anomalous Event Detection,
Proceedings of IEEE International Conference on Data Mining, 2017 (with S. Shin, M. Choi, J. Choi, S. Langevin, C. Bethune, P. Horne, N. Kronenfeld, R. Kannan, B. Drake, and J. Choo) 
DCNMF: Nonnegative matrix factorization based on
divideandconquer for fast clustering and topic modeling,
Journal of Global Optimization, 68:777798, 2017. (with R. Du, D. Kuang, and B. Drake) 
AxiSketcher: Interactive nonlinear axis mapping of visualizations through user drawings,
IEEE Transactions on Visualization and Computer Graphics (TVCG), 23(1):221230, 2017. (with B. Kwon, H. Kim, E. Wall, J. Choo, and A. Endert) 
Event Detection based on Nonnegative Matrix Factorization: Ceasefire Violat ion, Environmental, and Malware Events,
Proceedings of the 8th International Conference on Applied Human Factors and Ergonomics (AHFE2017), Human Factors in Cybersecurity, Los Angeles, CA, 2017, Springer. (with B. Drake, T. Huang, A. Scripka Beavers, and R. Du) 
PIVE:PerIteration Visualization Environment for realtime interactive visualization of computational methods,
Proceedings for the ThirtyFirst AAAI Conference on Artificial Intelligence (AAAI17), 2017. (with H. Kim, J. Choo, C. Lee, H. Lee, and C. Reddy) 
Dataenabled public preferences inform
integration of autonomous vehicles with
transitoriented development in Atlanta,
Cities, The International Journal of Urban Policy and Planning, 63:118127, 2017. (with Z. Lu, R. Du, D. Ellen, and J. Crittenden)
Journal of Global Optimization, pp.117, 2017, https://doi.org/10.1007/s108980170578x (with R. Du and B. Drake)
2016

InterAxis: steering scatterplot axes via observationlevel interaction,
IEEE Transactions on Visualization and Computer Graphics (TVCG), 22(1):131140, 2016. (with H. Kim, J. Choo, and A. Endert) 
A highperformance parallel algorithm for nonnegative matrix factorization,
Proceedings of the 21st ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming (PPoPP16), pp. 9:19:11, 2016. (with G. Ballard and R. Kannan) 
Bounded matrix low rank approximation,
Nonnegative Matrix Factorisation Techniques: Advances in Theory and Applications, Ed. G.R. Naik, Springer Berlin Heidelberg, pp. 89118, 2016. (with R. Kannan, M. Ishteva, and B. Drake) 
TileBased SpatioTemporal Visual Analytics via Topic Modeling on Social Media,
Proceedings of the IEEE Conference on Visual Analytics Science and Technology (VAST16), Baltimore, MD (Poster paper), 2016. (with Minsuk Choi, Jaeseong Yoo, Ashley S. Beavers, Scott Langevin, Chris Bethune, Sean McIntyre, Barry L. Drake, and Jaegul Choo)
2015

SymNMF: Nonnegative lowrank approximation of a similarity matrix for graph
clustering
Journal of Global Optimization , 62(3): 545574, 2015. (with D. Kuang and S. Yun) 
Hierarchical clustering of hyperspectral images using ranktwo
nonnegative matrix factorization
IEEE Transactions on Geoscience and Remote Sensing, 53(4): 20662078, 2015. (with N. Gillis and D. Kuang) 
Doubly supervised embedding based on label information
and intrinsic clusters for visualization
Neurocomputing, Vol. 150, Part B, pp. 570582, 2015 (with H. Kim, J. Choo, and C. Reddy) 
Weakly supervised nonnegative matrix factorization for
userdriven clustering
Data Mining and Knowledge Discovery, 29(6):15981621, 2015. (with J. Choo, C. Lee, and C. Reddy) 
Double Nystrom method: an efficient and accurate Nystrom scheme
for largescale data sets
Proceedings of the International Conference on Machine Learning (ICML15), Lille, France, July, 2015, to appear. (with W. Lim, M. Kim, and K. Jung) 
Simultaneous discovery of common and discriminative topics
via joint nonnegative matrix factorization
Proceedings of ACM SIG Conference on Knowledge Discovery and Data Mining (KDD15), Sydney, Australia, August, 2015. (with H. Kim, J. Choo, J. Kim, and C. Reddy) 
Estimating temporal dynamics of human emotions
Proceedings of the Twentyninth AAAI Conference on Artificial Intelligence (AAAI15), Austin, TX, January, 2015. (with S. Kim, J. Lee, and G. Lebanon) 
Local context sparse coding
Proceedings of the Twentyninth AAAI Conference on Artificial Intelligence (AAAI15), Austin, TX, January, 2015. (with S. Kim, J. Lee, and G. Lebanon) 
Behavioral clusters in dynamic graphs
Parallel Computing, 47:3850, 2015. (with J. Fairbanks, R. Kannan, and D. Bader) 
Nonnegative matrix factorization for interactive topic
modeling and document clustering
Partitional Clustering Algorithms (M.E. Celebi, Ed.), pp. 215243, 2015, Springer. (with D. Kuang and J. Choo)
2014
 Algorithms for nonnegative matrix and tensor factorizations: A unified view based on block coordinate descent framework
Journal of Global Optimization, 58(2): 285319, 2014. (with J.Kim and Y. He) 
Bounded matrix factorization for recommender system
Knowledge and Information Systems, 39(3): 491511, 2014. (with R. Kannan and M. Ishteva) 
Visual analytics for interactive exploration of largescale
document data via Nonnegative Matrix Factorization
Proceedings for BigData Innovators Gathering (BIG) 2014, colocated with WWW2014, Seoul, Korea, 2014. (with J. Choo and B. Drake) 
To Gather Together for a Better World:Understanding and leveraging communities in microlending recommendation
Proceedings for the Twentythird International Conference on World Wide Web (WWW), pp. 249260, Seoul, Korea, , 2014. (with J. Choo, D. Lee, B. Dilkina and H. Zha) 
Understanding and promoting microfinance activities in Kiva.org
Proceedings for the ACM Conference on Web Search and Data mining (WSDM14)}, pp. 583592, NY, NY, 2014. (with J. Choo, C. Lee, D. Lee, and H. Zha) 
PIVE:A Periteration visualization environment for
supporting realtime interactions with
computational methods,
Proceedings for the IEEE Conference on Visual Analytics Science and Technology (VAST14), Winner of Best Poster Award, 2014. (with J. Choo. C. Lee, H. Kim, H. Lee, C. Reddy, and B. Drake)
2013

Fast rank2 nonnegative matrix factorization for hierarchical
document clustering
Proceedings of the ACM SIG Conference on Knowledge Discovery and Data Mining (KDD13), pp. 739747 , 2013. (with D. Kuang) 
UTOPIAN: Userdriven Topic modeling based on interactive nonnegative matrix factorization
IEEE Transactions on Visualization and Computer Graphics (TVCG), 1912, pp. 19922001, 2013. (with J. Choo, C. Lee, and C. Reddy) 
Unfolding Latent Tree Structures using 4th Order Tensors
Proceedings of the International Conference on Machine Learning (ICML13), Atlanta, GA, 2013. (with M. Ishteva, and L. Song) 
Hierarchical tensor decomposition of latent tree graphical models,
Proceedings of the International Conference on Machine Learning (ICML13), Atlanta, GA, 2013. (with L. Song, M. Ishteva, A. Parikh, and E. Xing) 
Customizing computational methods for visual analytics with big data
IEEE Computer Graphics and Applications, Special Issue: Big Data Visualization, 334, pp. 2228, 2013. (with J. Choo) 
Combining Computational Analyses and Interactive Visualization for Document Exploration and Sensemaking in Jigsaw
IEEE Transactions on Visualization and Computer Graphics (TVCG), , 1910, pp. 16461663, 2013. (with C. Görg, Z. Liu, J. Kihm, J. Choo, and J. Stasko)  An interactive visual testbed system of dimension reduction and clustering for largescale highdimensional data
IS&T/SPIE Electronics Imaging 2013: Conference on Visualization and Data Analysis, Feb. 2013, Burlingame, CA, USA. (with J. Choo, H. Lee, Z. Liu, and J. Stasko) 
Topic modeling via nonnegative matrix factorization
on probability simplex,
Proceedings for the Workshop on Topic Models: Computation, Application, and Evaluation (NIPS13), Neural Information Processing Systems Foundation Conference, Lake Tahoe, Nevada, December 10, 2013. (with L. Song, and B. Xie) 
Interactive data analysis tool by augmenting MATLAB
with semantic objects
Proceedings for the thirteenth IEEE International Conference on Data Mining (ICDM13), ICDM2013 Demo Workshop, 2013. (with C. Lee, J. Choo, and D. Chau) 
Regularization paths for sparse nonnegative least squares problems
with applications to life cycle assessment tree discovery,
Proceedings for the thirteenth IEEE International Conference on Data Mining (ICDM13), 2013. (with J. Kim, N.Ramakrishnan, M. Marwah, and A. Shah) 
Augmenting MATLAB with semantic objects for an interactive
visual environment,
IEEE International Conference on Data Mining Demo Paper, 2013. (with C. Lee, J.Choo, and D. Chau).
2012
 iVisClustering:an interactive visual document clustering via topic modeling
Computer Graphics Forum, 31(3pt3):11551164, 2012. (with H. Lee, J. Kihm, J. Choo, and J. Stasko)  Bounded matrix low rank approximation
IEEE International Conference on Data Mining (ICDM12), 2012. (with R. Kannan and M. Ishteva)  Learning the dependency structure of latent factors
Conference on Neural Information Processing Systems (NIPS12), pp. 23752383, 2012. (with Y. He, Y. Qi, and K. Kavukcuoglu)  Fast Bregman divergence NMF using Taylor expansion and coordinate descent
Proceedings of ACM SIG Conference on Knowledge Discovery and Data Mining (KDD12), pp. 307315, Beijing, China, 2012. (with L. Li and G. Lebanon) 
A Visual Analytics Approach for Protein Disorder Prediction
Expanding the Frontiers of Visual Analytics and Visualization pp. 163174, 2012. (with J. Choo, L. Fuxin, and K. Joo)  Command Generation Techniques for a Pin Array using the SVD and the SNMF
Proceedings of the 10th IFAC Symposium on Robot Control (SYROCO12), pp. 411416, Dubrovnik, Croatia, 2012. (with R. Winck, J. Kim, and W.Book)  SemiNonnegative Matrix Factorization for Inputcoupled Systems
Proceedings of the American Control Conference, pp. 34843489, Montreal, Canada, 2012. (with R. Winck, J. Kim, and W. Book)  Symmetric nonnegative matrix factorization for graph clustering
Proceedings of the SIAM International Conference on Data Mining, 2012. (with D. Kuang and C. Ding)  Group sparsity in nonnegative matrix factorization
Proceedings of the SIAM International Conference on Data Mining, 2012. (with J.Kim and R. Monteiro)  Heterogeneous data fusion via space alignment using nonmetric multidimensional scaling
Proceedings of the SIAM International Conference on Data Mining, 2012. (with J. Choo et al.)  A control loop structure based on seminonnegative matrix factorization for inputcoupled systems
Proceedings of the SIAM International Conference on Data Mining, 2012. (with R. Winck, J. Kim and W. Book)
2011
 Polynomialtime
approximation scheme for minimum connected dominating set under routing
cost constraint in wireless sensor networks
Theoretical Computer Science, 2011 (with H. Du, Q. Ye, J. Zhong, Y. Wang, and W. Lee)  Fast nonnegative matrix factorization: An activesetlike method and comparisons
SIAM Journal on Scientific Computing, 33(6), pp. 32613281, 2011. (with J.Kim)  Fast nonnegative tensor factorization with an activesetlike method
High Performance Scientific Comptuing: Algorithms and Applications, Springer, 2011. (with J.Kim)  Sparse nonnegative matrix factorization for protein sequence motif discovery
Expert Systems and Applications, 38(10):1319813207, 2011. (with W.Kim, B. Chen, J. Kim, and Y. Pan)  A fast algorithm for sparse PCA and a new sparsity control criteria
Proceedings of SIAM International Conference on Data Mining, Mesa, AR, April, 2011. (with Y. He, R. Monteiro)  Statistical optimization of nonnegative matrix factorization
Proceedings of The Fourteenth International Conference on Artificial Intelligence and Statistics (AISTATS) 2011, JMLR: W&CP 15, pp 128136, Fort Lauderdale, FL, USA, Apr. 1113, 2011. (with A. Korattikara, L. Boyles, M. Welling, and J. Kim)
2010
 Generalized
Singular Value Decomposition based algorithm for multiuser
multipleinput multipleoutput linear precoding and antenna selection
IET Communications, 4(16):18991907, 2010. (with J. Park and J. Chun)  PTAS for minimum connected dominating set with routing cost constraint in wireless sensor networks
Proceedings of the 4th Annual International Conference on Combinatorial Optimization and Applications, pp. 252259, The Big Island, Hawaii, 2010. (with H. Du, Q. Ye, J. Zhong, and W. Lee)  iVisClassifier: An interactive visual analytics system for classification based on supervised dimension reduction
Proceedings of the IEEE Visual Analytics Science and Technology (VAST10) Conference, Salt Lake City, Utah, October, 2010. (with J. Choo, H. Lee, and J. Kihm)  Fast activesettype algorithms for L1regularized linear regression
Proceedings of the Thirteenth Internional Conference on Artificial Intelligence and Statistics (AISTATS10), May 2010. (with J. Kim)  Supervised Raman spectra estimation based on Nonnegative rank deficient least squares
Proceedings of the 13th International Conference on Information Fusion, Edinburgh, 2010. (with B. Drake, J. Kim, and M. Mallick)  pISOMAP: Efficient Parameter Update for ISOMAP with Applications to Visualization
Proceedings of SIAM International Conference on Data Mining, 2010. (with J. Choo, C. Reddy, and H. Lee)
2009
 Data Transformations and Representations for Computation and Visualization
Information Visualization, 8:275285, 2009. (with D.J. Kasik, D. Ebert, G. Lebanon, and W.M. Pottenger)  Raman spectra estimation with classical and nonnegative least squares
Proceedings of the joint conference of ASCM2009 and MACIS2009, pp. 4453, Fukuoka, Japan, December 1417, 2009. (with B. Drake, J. Kim, and M. Mallick)  Comparison of Raman spectra estimation algorithms
Proceedings of the 12th International Conference on Information Fusion, pp. 22392246, Seattle, WA, July 69, 2009. (with M. Mallick, B. Drake, et al.)  Efficient GSVD based multiuser MIMO linear precoding and antenna selection scheme
Proceedings of IEEE International Conference on Communications (ICC09), pp. 16, Dresden, Germany, June 1418, 2009. (with J. Park and J. Chun)  Twostage Methods for Linear Discriminant Analysis: Equivalent Results at a Lower Cost
Technical Report GTCSE, 2009 (with P. Howland)  Twostage Framework for Visualization of Clustered High Dimensional Data
Proceedings of IEEE Symposium on Visual Analytics Science and Technology, 2009 (with J. Choo and S. Bohn)  Hierarchical Linear Discriminant Analysis for Beamforming
Proceedings of the SIAM International Conference on Data Mining, pp. 894905, 2009. (with J. Choo and B.L. Drake)
2008
 Statistical properties analysis of real world tournament selection in genetic algorithms
Applied Intelligence, 282:195205, 2008. (with S. Lee, S. Soak, and M. Jeon)  Toward Faster Nonnegative Matrix Factorization: A New Algorithm and Comparisons
Proceedings of the IEEE International Conference on Data Mining, pp. 353362, 2008. (with J. Kim)  Linear Discriminant Analysis for Hierarchically Clustered Data with Regularization
Proceedings of the International Conference on Pattern Recognition, 2008. (with J. Choo and B.L. Drake)  Sparse Nonnegative Matrix Factorization for Clustering
Technical Report GTCSE0801, 2008 (with J. Kim)  A comparison of generalized linear discriminant analysis algorithms
Pattern Recognition, 413:10831097, 2008.
(with C. Park)  Nonnegative Matrix Factorization Based on Alternating Nonnegativityconstrained Least Squares and the Active Set Method
SIAM Journal on Matrix Analysis and Applications,30(2):713730, 2008.
(with H. Kim)
2007
 Binary particle swarm optimization with bit change mutation
IEICE Trans. on Fundamentals of Electronics, Communications and Computer Sciences, E90A10:22532256, 2007. (with S. Lee and M. Jeon)  Quality assessment of gene selection in microarray data
Optimization Methods and Software, 221:145154, 2007. (with C. Park, M. Jeon, and P. Pardalos)  Distance preserving dimension reduction using the QR factorization and the Cholesky factorization
Proceedings of IEEE 7th International Conference on Bioinformatics and Bioengineering (BIBE07), Vol. I, pp. 263269, Boston, MA, Oct. 1417, 2007. (with H. Kim and H. Zha)  A comparison of unsupervised dimension reduction algorithms for classification
Proceedings of the IEEE International Conference on Bioinformatics and Biomedicine 2007 (BIBM07), pp. 7177, Silicon Valley, CA, Nov. 24, 2007. (with J. Choo, H. Kim, and H. Zha)  Cancer class discovery using nonnegative matrix factorization based on alternating nonnegativity constrained least squares
Proceedings of ISBRA International Symposium on Bioinformatics Research and Applications (ISBRA07), Lecture Notes in Computer Science, Bioinformatics Research and Applications, 4462/2007, pp. 477487, 2007, Springer. (with H. Kim)  Distance preserving dimension reduction for manifold learning
Proceedings of SIAM International Conference on Data Mining (SDM07), pp. 527532, Minneapolis, MN, April, 2007. (with H. Kim and H. Zha)  Nonnegative tensor factorization based on alternating largescale nonnegativityconstrained least squares
Proceedings of IEEE 7th International Conference on Bioinformatics and Bioengineering (BIBE07),Vol. II, pp. 11471151, 2007.
(with H. Kim and L. Elden)  Fast Linear Discriminant Analysis using QR Decomposition and Regularization
Technical Report GTCSE0721, 2007
(with B. Drake, S. Lee, and C. Park)  Sparse Nonnegative Matrix Factorizations via Alternating Nonnegativityconstrained Least Squares for Microarray Data Analysis
Bioinformatics, 2312:14951502, 2007.
(with H. Kim)  Extracting Unrecognized Gene Relationships from the Biomedical Literature via Matrix Factorizations
BMC Bioinformatics, 8(supp 9):S6, 2007.
(with H. Kim, and B. Drake )  Multiclass Classifiers Based on Dimension Reduction with Generalized LDA
Pattern Recognition, 4011:29392945, 2007.
(with H. Kim, and B. Drake )  CallRank: Combating SPIT using call duration, social networks, and global reputation
The Proceedings of the Fourth Conference on Email and AntiSpam (CEAS2007), Mountain View, CA, Aug. 2007.
(with V.A. Balasubramaniyan and M. Ahamad)
2006
 Sparse nonnegative matrix factorizations via alternating nonnegativityconstraint least squares
Proceedings of the IASTED International Conference on Computational and Systems Biology (CASB06), pp. 95100, Dallas, TX, November, 2006. (with H. Kim)  Orthogonal nonnegative matrix trifactorizations for clustering
Proceedings of the twelfth ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD06), pp. 126135, Philadelphia, PA, 2006. (with C. Ding, T. Li, and W. Peng)  Discriminant analysis using nonnegative matrix factorization for nonparametric multiclass classification
Proceedings of the IEEE International Conference on Granular Computing, pp. 182187, Atlanta, GA, May 1012, 2006. (with H. Kim)  Feature extraction via generalized uncorrelated linear discriminant analysis
IEEE Transactions on Knowledge and Data Engineering, vol. 18, No. 10, pp. 13121322, 2006.
(with J. Ye, R. Janarda, and Q. Li )  Adaptive nonlinear discriminant analysis by regularized minimum squared errors
IEEE Transactions on Knowledge and Data Engineering,Vol. 18, No. 5, pp. 603612, 2006
(with H. Kim and B. Drake)  Solving the small sample size problem in face recognition using generalized discriminant analysis
Pattern Recognition, 392, pp. 277287, 2006.
(with P. Howland and J. Wang)
2005
 Twodimensional concept vector machines based on an ionic interaction model
Proceedings of the IEEE International Conference on Neural Networks and Brain (ICNN&B2005), pp. 19911995, Beijing, China, October 1315, 2005, Vol. 3. (with H. Kim)  A relationship between LDA and the generalized minimum squared error solution
SIAM Journal on Matrix Analysis and Applications, 272, pp. 474492, 2005.
(with C. Park)  Nonlinear discriminant analysis using kernel functions and the generalized singular value decomposition
SIAM Journal on Matrix Analysis and Applications, 271, pp. 98102, 2005.
(with C. Park)  A threestage framework for gene expression data analysis by L1 norm support vector regression
International Journal of Bioinformatics Research and Applications, 11, pp. 5162, 2005.
(with H. Kim, J. Zhou, and H. Morse)  Fingerprint classification using fast Fourier transform and nonlinear discriminant analysis
Pattern Recognition, Vol. 38, No. 4, pp. 495503, 2005.
(with C. Park)  IDR/QR: An incremental dimension reduction algorithm via QR decomposition
IEEE Transaction on Knowledge and Data Engineering, Special Issue  Intelligent Data Preparation, 179:12081222, 2005.
(with J. Ye, Q. Li, H. Xiong, R. Janardan, and V. Kumar)  Missing value estimation for DNA microarray expression data: local least squares imputation
Bioinformatics, 212, pp. 187198, 2005.
(with H. Kim and G. Golub)  Dimension reduction in text classification using support vector machines
Journal of Machine Learning Research, 6, pp. 3753, 2005
(with H. Kim and P. Howland)
2004
 A comparative study of linear and nonlinear feature extraction methods
Proceedings for the Fourth IEEE International Conference on Data Mining (ICDM04), pp. 495498, Brighton, United Kingdom, November, 2004. (with C. Park)  Imputation of missing values in DNA microarray gene expression data,
Proceedings of the IEEE Computer Society Bioinformatics Conference (CSB04), pp. 572573, Stanford, CA, August, 2004. (with H. Kim and G. Golub)  Incremental and decremental least squares support vector machine and its application to drug design,
Proceedings of the IEEE Computer Society Bioinformatics Conference (CSB04), pp. 656657, Stanford, CA, August, 2004. (with H. Kim)  Fingerprint classification using fast Fourier transform and nonlinear discriminant analysis,
Proceedings of UKC2004 (2004 USKorea Conference on Science, Technology and Entrepreneurship) 8, pp. 1214, Durham, NC, August, 2004. (with C. Park)  An incremental dimension reduction algorithm via QR decomposition,
Proceedings for the ACM SIGKDD conference (KDD04), pp. 364373, Seattle, WA, USA, August, 2004. (Out of 337 submitted papers, a total of 40 full papers were selected for oral presentation.) (with J. Ye, H. Xiong, R. Janardan, and V. Kumar)  Feature extraction via generalized uncorrelated linear discriminant analysis,
Proceedings for the twenty first International Conference on Machine Learning (ICML04), pp. 895902, Banff, Alberta, Canada, July, 2004. (with J. Ye, R. Janardan, and Q. Li)  Gene selection by LDA based on generalized singular value decomposition,
Proceedings for the Bioinformatics Workshop of the fourth SIAM International Conference on Data Mining (SDM04), pp. 3641, Kissimmee, FL, April, 2004. (with H. Kim)  Data reduction in support vector machines by a kernelized ionic interaction model,
Proceedings for the fourth SIAM International Conference on Data Mining (SDM04), pp. 507511, Kissimmee, FL, April, 2004. (with H. Kim)  Prediction of protein relative solvent accessibility with support vector machines and longrange interaction 3D local descriptor
Proteins: structure, function, and bioinformatics, 543, pp. 557562, 2004.
(with H. Kim)  Nonlinear feature extraction based on centroids and kernel functions
Pattern Recognition, 37:4, pp. 801810, 2004.
(with C. Park)  Generalizing Discriminant Analysis Using the Generalized Singular Value Decomposition
IEEE Transactions on Pattern Analysis and Machine Intelligence, 268, pp. 9951006, 2004.
(with P. Howland)  An optimization criterion for generalized discriminant analysis on undersampled problems,
IEEE Transactions on Pattern Analysis and Machine Intelligence, 268, pp. 982994, 2004.
(with J. Ye, R. Janardan, and C. Park)  Equivalence of several twostage methods for linear discriminant analysis,
Proceedings of the Fourth SIAM International Conference on Data Mining, Kissimmee, FL, 2004.
(with P.Howland)
2003
 Nonlinear feature extraction based on centroids and kernel functions,
Proceedings for the Third IEEE International Conference on Data Mining (ICDM03), pp. 243250, Melbourne, Florida, 2003. (Out of 501 submitted papers, a total of 58 regular papers were selected for presentation.) (with C. Park)  A new optimization criterion for generalized discriminant analysis on undersampled problems,
Proceedings for the Third IEEE International Conference on Data Mining (ICDM03), pp. 419426, Melbourne, Florida, 2003. (Out of 501 submitted papers, a total of 58 regular papers were selected for presentation.) (with Y. Ye, R. Janardan, and C. Park)  Text categorization using support vector machines with dimension reduction,
Proceedings for the third SIAM international workshop on text mining (SDM03), pp. 4859, San Francisco, CA, May, 2003. (with H. Kim and P. Howland)  Protein secondary structure prediction by an improved support vector machines approaches
Protein Engineering, 168, pp.18,2003.
(with H. Kim)  DNA screening, pool designs, and simplicial complex,
Journal of Combinatorial Optimization, 74, pp. 389394, 2003.
(with C.Li, W.Wu, X.Wu, and H.G.Zhao)  Structure preserving dimension reduction for clustered text data based on the generalized singular value decomposition
SIAM Journal on Matrix Analysis and Applications, 251:165179, 2003.
(with P. Howland and M. Jeon)  Lower dimensional representation of text data based on centroids and least squares
BIT, 432:122, 2003.
(with M. Jeon and J.B. Rosen)  A decision criterion for the optimal number of clusters in hierarchical clustering
Journal of Global Optimization, 25:91111, 2003.
(with Y. Jung, D.Z. Du, and B.L. Drake)  Exponential modeling with unknown model order using structured nonlinear total least norm
Advances in Computational Mathematics, 19:307322, 2003
(with L. Zhang and J.B. Rosen)
2002
 Extension of discriminant analysis based on the generalized singular value decomposition,
Proceedings for the second SIAM international workshop on text mining (SDM02), Arlington, VA, April, 2002. Also Technical Report 02021, Department of Computer Science and Engineering, University of Minnesota, Twin Cities, 2002. (with P. Howland)
2001
 A balanced termweighting scheme for improved document comparison and classification,
Proceedings for the first SIAM international workshop on text mining (SDM01), Chicago, IL, April, 2001. (with Y. Jung and D.Z. Du)  Dimension reduction based on centroids and least squares for efficient processing of text data,
Proceedings for the first SIAM international workshop on text mining (SDM01), Chicago, IL, April, 2001. (with M. Jeon and J.B. Rosen)
2000
 Schurtype methods for solving least squares problems with Toeplitz structure
SIAM Journal on Scientific Computing, 222, pp. 406430, 2000.
(with L. Eldén)  Signal identification using a least L_1 norm algorithm
Optimization and Engineering, 1, pp. 5165, 2000.
(with J.B. Rosen, and J. Glick)  Accurate solution to overdetermined linear equations with errors using L_1 norm minimization
Computational Optimization and Applications, 17, pp. 329341, 2000.
(with J. B. Rosen, J. Glick, L. Zhang)  Distributed simulation of freeway traffic flows using personal computers,
ComputerAided Civil and Infrastructure Engineering, 15, pp. 167175, 2000.
(with E. Kwon and B. Choi)
1999
 A Procrustes problem on the Stiefel manifold
Numerische Mathematik, 82, pp. 599619, 1999.
(with L. Eldén)  Low rank approximation of a Hankel matrix by structured total least norm
BIT, 39:4, pp. 757779, 1999.
(with J.B. Rosen and L. Zhang)  Structured total least norm for nonlinear problems,
SIAM Journal on Matrix Analysis and Applications, 201:1430, 1999. (with J.B. Rosen and J. Glick)
1998
 A personal computerbased parallel simulation system for online assessment of freeway operational strategies,
the Proceedings for the 4th Annual ITS World Congress, 1998. (with E. Kwon and B. Choi)
1997
 Stability analysis and fast algorithms for triangularization of Toeplitz matrices
Numerische Mathematik, 763, pp. 383400, 1997.
(with L. Eldén)  Schurtype methods based on subspace criteria,
the Proceedings for the IEEE Int. Symp. on Circuits and Systems, pp. 26612664, Hong Kong, 1997. (with J¨urgen G¨otze)  Parallel simulation of freeway traffic flows on a personal computerbased distributed computing system,
the Proceedings for the 3rd Annual ITS World Congress, pp. 3642, 1997. (with E. Kwon and K. Yoo)
1996
 Formulation and solution of structured Total Least Norm problems for parameter estimation
IEEE Transactions on Signal Processing, 4410, pp. 24642474,, 1996.
(with S. Van Huffel and J.B. Rosen)  Total least norm formulation and solution for structured problems
SIAM Journal on Matrix Analysis and Applications, 171, pp. 110128, 1996.
(with J.B. Rosen and J. Glick)  Selfscaling fast rotations for stiff least squares problems
Linear Algebra and its Applications, 234, pp. 137161, 1996.
(with A.A. Anda)  Perturbation and error analyses for block downdating of a Cholesky decomposition
BIT, 36, pp. 239255, 1996.
(with L. Eldén)  Accurate downdating of a QR decomposition
BIT, 361, pp. 166181, 1996.
(with K. Yoo)
1995
 Downdating rankrevealing URV decomposition,
SIAM Journal on Matrix Analysis and Applications, 161, pp. 138155, 1995.
(with L. Eldén)  Fast residual computation for sliding window recursive least squares methods
Signal Processing, Vol. 45, No. 1, pp. 8595, 1995.
(with K. Yoo)  Efficient reduction algorithms for bordered band matrices
Numerical Linear Algebra with Applications, Special issue dedicated to Parlett and Kahan, 22, pp. 95114, 1995.
(with S. Van Huffel)  Twoway bidiagonalization scheme for downdating the singular value decomposition
Linear Algebra and its Applications, 222, pp.117, 1995.
(with S. Van Huffel)  Structure preserving total least squares method and its application to parameter estimation. SVD and signal processing, III:
Algorithms, architectures and applications. Ed. M. Moonen and B. De Moor, pp. 399406, Elsevier, 1995.
(with J.B. Rosen and S. Van Huffel)  Structured total least norm method for Toeplitz problems,
the proceedings for IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol. 2, pp. 11411144, Detroit, MI, May, 1995. (with J.B. Rosen and J. Glick)  Total least norm problem formulation and solution of structured problems in parameter extraction,
Proceedings of the ProRISC/IEEE Benelux Workshop on Circuits, Systems and Signal Processing, pp. 317326, Mierlo, The Netherlands, March 2224, 1995. (with S. Van Huffel and J.B. Rosen)
1994
 Block downdating of least squares solutions
SIAM Journal on Matrix Analysis and Applications, 153, pp. 10181034, 1994.
(with L. Eldén)  Accurate downdating of least squares solutions
SIAM Journal on Matrix Analysis and Applications, 152, pp. 549568, 1994.
(with Å. Björck and L. Eldén)  ESPRIT directionofarrival estimation in the presence of spatially correlated noise,
SIAM Journal on Matrix Analysis and Applications, 151, pp. 185193, 1994.  Fast plane rotations with dynamic scaling,
SIAM Journal on Matrix Analysis and Applications, 151, pp. 162174, 1994.
(with A. Anda)  On competitive algorithms for group testing,
SIAM Journal on Computing, 235, pp. 10191025, 1994.
(with D.Z. Du)  Perturbation analysis for block downdating of a Cholesky decomposition,
Numerische Mathematik, 68, pp. 457467, 1994.
(with L. Eldén).  Parallel tri and bidiagonalization of bordered bidiagonal matrices,
Parallel Computing, 20, pp. 11071128, 1994. (with S. Van Huffel)  Fast algorithms for exponential data modeling,
the proceedings for IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol 4, pp. 2528, Adelaide, Australia, April 1922, 1994. (with L. Eld´en and S. Van Huffel)
1993
 An algorithm for the generalized singular value decomposition on massively parallel computers,
Journal of Parallel and Distributed Computing, 17, pp. 267276, 1993. (with L.M. Ewerbring)  A real algorithm for the Hermitian eigenvalue decomposition,
BIT, 33, pp. 158171, 1993. (with V. Hari)  Fast and accurate Toeplitz matrix triangularization for linear prediction,
IEEE workshop on VLSI Signal Processing VI, pp. 343352, 1993. (with L. Eld´en)  Improved parallel algorithm for band matrix reconstruction,
Proceedings of the ProRISC IEEE Workshop on Circuits, Systems and Signal Processing, pp. 275280, Houthalen, Belgium, March 2425, 1993. (with S. Van Huffel)
1992
 On multiple error detection in matrix triangularizations using checksum methods,
Journal of Parallel and Distributed Computing, 14, pp. 9097, 1992.  Fast computation of eigenvalue decompositions on vector architectures,
Advances in Optimization and Parallel Computing, pp. 2641, NorthHolland, 1992. (with A.A. Anda)
1991
 A parallel algorithm for the unbalanced orthogonal Procrustes problem,
Parallel Computing, 17, pp. 913923, 1991.  An algorithm for the generalized singular value decomposition on massively parallel computers,
Proceedings for the ACM International Conference on Supercomputing, pp. 136145, 1991. (with L.M. Ewerbring)
1990
 Efficient implementation of Jacobi algorithms and Jacobi sets on distributed memory architectures,
Journal of Parallel and Distributed Computing, special issue on
Algorithms for Hypercube Computers, 8, pp. 358366, 1990. (with P.J. Eberlein)  Efficient diagonalization of oversized matrices on a distributedmemory multiprocessor,
Annals of Operations Research, 22, pp. 253269, 1990.  Matrix diagonalization algorithms for oversized problems on a distributedmemory multiprocessor,
Mathematics in Signal Processing II, ed. J.G. McWhirter, Oxford University Press, pp. 615630, 1990.  The parallel solution of the matrix eigenproblem with applications in control theory,
Signal Processing, Scattering and Operator Theory, and Numerical Methods,
ed. M.A. Kaashoek, J.H. Van Schuppen, and A.C.M. Ran, Birkhauser, pp. 373380, 1990.
(with D. Boley, R. Maier, and P.J. Eberlein)  Computing the generalized singular value decomposition on the Connection Machine,
Proceedings for SPIE conference on Advanced Signal Processing Algorithms, Architectures, and Implementations, pp. 392405, 1990. (with L.M. Ewerbring)
1989
 A proof of convergence for two parallel Jacobi SVD algorithms,
IEEE Transactions on Computers, 38(6), pp. 806811, 1989. (with F.T. Luk)  On parallel Jacobi orderings,
SIAM Journal on Scientific and Statistical Computing, 10(1), pp. 1826, 1989. (with F.T. Luk)  Eigensystem computation on hypercube architectures,
the Proceedings of the Fourth Conference on Hypercube Concurrent Computers and Application, pp. 689692, 1989. (with P.J. Eberlein)
1988
 An analysis of algorithmbased fault tolerance techniques,
Journal of Parallel and Distributed Computing, pp. 172184, 1988. (with F.T. Luk)  Faulttolerant matrix triangularizations on systolic arrays,
IEEE Transactions on Computers, 37(11), pp. 14341438, 1988. (with F.T. Luk)  Multiple error algorithmbased fault tolerance for matrix triangularizations,
Proceedings for SPIE Conference on Advanced Algorithms and Architectures for Signal Processing III, Vol. 975, pp. 258267, 1988.  Equivalence and convergence of parallel Jacobi SVD methods,
Proceedings for SPIE Conference on Advanced Algorithms and Architectures for Signal Processing, pp. 152159, 1987. (with F.T. Luk)