---++ Call for Papers In addition to 8 plenary lectures and a special lecture by Emmanuel Candes, the workshop will feature a single track format with approximately 29 standard (20min) talks, 3 highlight (30min) talks, and 3 poster and demo sessions. Contributions (talks and demos) are solicited as one-page abstracts in double column SPARS workshop abstract format. The abstract may extend to a second page in order to include figures, tables and references, as long as the title, text and mathematics of the abstract occupy no more than one page in a font-size no smaller than 9-point. Talks should present recent and novel research results and these may include material from papers already submitted to a journal. We specifically welcome abstract submissions for technological demonstrations of the mathematical topics within our scope. ---+++ Contributions to the workshop are solicited in or close to the following areas: * Sparse coding and representations, vector quantization, and dictionary learning. * Sparse and low-rank approximation algorithms: performance and complexity analysis, new methodologies. * Compressive sensing and learning: new theory and methods. * Dimensionality reduction, feature extraction, classification, detection, and source separation. * Sparsity measures in approximation theory, information theory and statistics. * Regularization theory with low-complexity / low-dimensional structures. * Statistical models and algorithms for sparsity, including Bayesian, likelihood-based, entropy and variational Bayes. * Sparse network theory and analysis, including dynamic (time-varying) networks and large networks. * Applications of sparsity and low-rank ideas to areas such as 'recovery without phase' and inverse covariance estimation. * Big data applications, including but not limited to geophysics, neuroscience, biomedical imaging, array processing, genetics, optics and radar, and feedback control. A best student paper prize will be awarded. Students who wish to be considered for this prize must submit a six page extended summary in single column workshop format as supplementary material. To be eligible, the main contributor of the work must be a student or must have recently graduated from a Ph.D. program (i.e. after SPARS 2013). The supplementary six page summaries will be used to award the prize, and will not be included in the SPARS 2015 proceedings. Submitted contributions should be of sufficient depth for review by experts in the field. <span style="color: orangered;"> *The submission deadline is January 21, 2015* </span>, at midnight, Greenwich Mean Time (extended 24 hours to avoid any problems with congestion). Notification of acceptance will be sent by April 22, 2015. Detailed information on paper submission is given on the [[AuthorInformation][Information for Authors]] page.
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