Lecturer in Computing (Room 2.04)

4498627

cristian.rusu@ncirl.ie

Key Responsibilities at NCI

• Lecturer in Computing
• In charge of Cloud Application Development and Security classes

Education

• 2009, Bachelor of Science, The University Politehnica of Bucharest
• 2011, Master of Science, The University Politehnica of Bucharest
• 2012, PhD, The University Politehnica of Bucharest

Academic Experience

• 2013-2014, Postdoctoral researcher, IMT Institute for Advanced Studies, Lucca, Italy
• 2014-2016, Postdoctoral researcher, The University of Vigo, Spain (visiting researcher at the University of Texas at Austin, USA)
• 2016-2017, Postdoctoral researcher, The University of Edinburgh, UK

Industrial Experience

• Involved with two start-ups related to software for machine learning and IoT

Research Interests

• Algorithm design, numerical algorithms, machine learning and data analytics, signal processing, algorithms for mmwave communication and sensor networks, IoT

Professional Body Membership

• IEEE

Research Publications

Published International Journal Articles

• Rusu, Cristian, González-Prelcic, Nuria and Heath, Robert W. (2018) "Algorithms for the construction of incoherent frames under various design constraints". Signal Processing, 152. pp. 363-372. ISSN 0165-168. DOI: 10.1016/j.sigpro.2018.06.015
• Rusu, Cristian, Thompson, John and Robertson, Neil M. (2018) "Sensor Scheduling With Time, Energy, and Communication Constraints". IEEE Transactions on Signal Processing, 66 (2). pp. 528-539. ISSN 1941-0476. DOI: 10.1109/TSP.2017.2773429
• Rusu, Cristian and Thompson, John (2017) "Learning Fast Sparsifying Transforms". IEEE Transactions on Signal Processing, 65 (16). pp. 4367-4378. ISSN 1941-0476. DOI: 10.1109/TSP.2017.2712120
• Rusu, Cristian, González-Prelcic, Nuria and Heath, Robert W. (2016) "Fast Orthonormal Sparsifying Transforms Based on Householder Reflectors". IEEE Transactions on Signal Processing, 64 (24). pp. 6589-6599. ISSN 1941-0476. DOI: 10.1109/TSP.2016.2612168
• Rusu, Cristian, Méndez-Rial, Roi, González-Prelcic, Nuria and Heath, Robert W. (2016) "Low Complexity Hybrid Precoding Strategies for Millimeter Wave Communication Systems". IEEE Transactions on Wireless Communications, 15 (12). pp. 8380-8393. ISSN 1536-1276. DOI: 10.1109/TWC.2016.2614495
• Rusu, Cristian, González-Prelcic, Nuria and Heath, Robert W. (2016) "Properties of real and complex ETFs and their application to the design of low coherence frames". Linear Algebra and its Applications, 508. pp. 81-90. ISSN 0024-3795. DOI: 10.1016/j.laa.2016.06.038
• Rusu, Cristian and González-Prelcic, Nuria (2016) "Designing Incoherent Frames Through Convex Techniques for Optimized Compressed Sensing". IEEE Transactions on Signal Processing, 64 (9). pp. 2334-2344. ISSN 1941-0476. DOI: 10.1109/TSP.2016.2521607
• Méndez-Rial, Roi, Rusu, Cristian, González-Prelcic, Nuria, Alkhateeb, Ahmed and Heath, Robert W. (2016) "Hybrid MIMO Architectures for Millimeter Wave Communications: Phase Shifters or Switches?" IEEE Access, 4. pp. 247-267. ISSN 2169-3536. DOI: 10.1109/ACCESS.2015.2514261
• Minervini, Massimo, Rusu, Cristian, Damiano, Mario, Tucci, Valter, Bifone, Angelo, Gozzi, Allesandro and Tsaftaris, Sotirios A. (2015) "Large-scale analysis of neuroimaging data on commercial clouds with content-aware resource allocation strategies". The International Journal of High Performance Computing Applications, 29 (4). pp. 473-488. ISSN 1741-2846. DOI: 10.1177/1094342013519483
• Rusu, Cristian, Morisi, Rita, Boschetto, Davide, Dharmakumar, Rohan and Tsaftaris, Sotirios A. (2014) "Synthetic Generation of Myocardial Blood–Oxygen-Level-Dependent MRI Time Series Via Structural Sparse Decomposition Modeling". IEEE Transactions on Medical Imaging, 33 (7). pp. 1422-1433. ISSN 1558-254X. DOI: 10.1109/TMI.2014.2313000
• Rusu, Cristian, Dumitrescu, Bogdan and Tsaftaris, Sotirios A. (2014) "Explicit Shift-Invariant Dictionary Learning". IEEE Signal Processing Letters, 21 (1). pp. 6-9. ISSN 1558-2361. DOI: 10.1109/LSP.2013.2288788
• Rusu, Cristian (2013) "Design of Incoherent Frames via Convex Optimization". IEEE Signal Processing Letters, 20 (7). pp. 673-676. ISSN 1558-2361. DOI: 10.1109/LSP.2013.2263280
• Rusu, Cristian (2013) "Clustering large datasets - Bounds and applications with K-SVD". UPB Scientific Bulletin, Series C: Electrical Engineering, 75 (2). pp. 31-40. ISSN 2286-3540.
• Rusu, Cristian and Dumitrescu, Bogdan (2012) "Stagewise K-SVD to Design Efficient Dictionaries for Sparse Representations". IEEE Signal Processing Letters, 19 (10). pp. 631-634. ISSN 1558-2361. DOI: 10.1109/LSP.2012.2209871
• Rusu, Cristian and Dumitrescu, Bogdan (2012) "Iterative reweighted l1 design of sparse FIR filters". Signal Processing, 92 (4). pp. 905-911. ISSN 0165-1684. DOI: 10.1016/j.sigpro.2011.09.031
• Rusu, Cristian (2011) "Classification of music genres using sparse representations in overcomplete dictionaries". Journal of Control Engineering and Applied Informatics, 13 (1). pp. 35-42. ISSN 1454-8658.

Book Chapters

• Bampis, Christos G., Rusu, Cristian, Hajj, Hazem and Bovik, Alan C. (2018) "Robust matrix factorization for collaborative filtering in recommender systems". In: 51st Asilomar Conference on Signals, Systems, and Computers 2017. IEEE, pp. 415-419. ISBN 9781538618233. DOI: 10.1109/ACSSC.2017.8335371
• Rusu, Cristian and Thompson, John (2017) "Node Sampling by Partitioning on Graphs via Convex Optimization". In: 2017 Sensor Signal Processing for Defence Conference (SSPD). IEEE, London, pp. 1-5. ISBN 9781538616635. DOI: 10.1109/SSPD.2017.8233246
• Rusu, Cristian and Thompson, John (2017) "Learning fast sparsifying overcomplete dictionaries". In: 25th European Signal Processing Conference (EUSIPCO). IEEE, Kos, pp. 723-727. ISBN 9780992862671. DOI: 10.23919/EUSIPCO.2017.8081302
• Rusu, Cristian and Thompson, John (2017) "On the use of tight frames for optimal sensor placement in time-difference of arrival localization". In: 2017 25th European Signal Processing Conference (EUSIPCO). IEEE, Kos, pp. 1415-1419. ISBN 9780992862671. DOI: 10.23919/EUSIPCO.2017.8081442
• Rusu, Cristian, Thompson, John and Robertson, Neil M. (2017) "Balanced sensor management across multiple time instances via l-1/l-infinity norm minimization". In: 2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, pp. 3311-3315. ISBN 9781509041176. DOI: 10.1109/ICASSP.2017.7952769
• López-Valcarce, Roberto, González-Prelcic, Nuria, Rusu, Cristian and Heath, Robert W. (2016) "Hybrid Precoders and Combiners for mmWave MIMO Systems with Per-Antenna Power Constraints". In: 2016 IEEE Global Communications Conference (GLOBECOM). IEEE, Washington, DC. ISBN 9781509013289. DOI: 10.1109/GLOCOM.2016.7841881
• Rusu, Cristian, González-Prelcic, Nuria and Heath, Robert W. (2016) "Array thinning for antenna selection in millimeter wave MIMO systems". In: 2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, Shanghai, pp. 3416-3420. ISBN 9781479999880. DOI: 10.1109/ICASSP.2016.7472311
• Rusu, Cristian, González-Prelcic, Nuria and Heath, Robert W. (2016) "The use of unit norm tight measurement matrices for one-bit compressed sensing". In: 2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, Shanghai, pp. 4044-4048. ISBN 9781479999880. DOI: 10.1109/ICASSP.2016.7472437
• González-Prelcic, Nuria, Truong, Kien T., Rusu, Cristian and Heath, Robert W. (2016) "Compressive Channel Estimation in FDD Multi-Cell Massive MIMO Systems with Arbitrary Arrays". In: 2016 IEEE Globecom Workshops (GC Wkshps). IEEE, Washington, DC, pp. 1-5. ISBN 9781509024827. DOI: 10.1109/GLOCOMW.2016.7848864
• Rusu, Cristian, Méndez-Rial, Roi, González-Prelcic, Nuria and Heath, Robert W. (2015) "Adaptive One-Bit Compressive Sensing with Application to Low-Precision Receivers at mmWave". In: 2015 IEEE Global Communications Conference (GLOBECOM). IEEE, San Diego, CA. ISBN 9781479959525. DOI: 10.1109/GLOCOM.2015.7417853
• Rusu, Cristian, González-Prelcic, Nuria and Heath, Robert W. (2015) "Low resolution adaptive compressed sensing for mmWave MIMO receivers". In: 2015 49th Asilomar Conference on Signals, Systems and Computers. IEEE, Pacific Grove, CA, pp. 1138-1143. ISBN 9781467385763. DOI: 10.1109/ACSSC.2015.7421318
• Méndez-Rial, Roi, Rusu, Cristian, Alkhateeb, Ahmed, González-Prelcic, Nuria and Heath, Robert W. (2015) "Channel estimation and hybrid combining for mmWave: Phase shifters or switches?" In: 2015 Information Theory and Applications Workshop (ITA). IEEE, San Diego, CA, pp. 90-97. ISBN 9781479971954. DOI: 10.1109/ITA.2015.7308971
• Rusu, Cristian, Méndez-Rial, Roi, González-Prelcic, Nuria and Heath, Robert W. (2015) "Low complexity hybrid sparse precoding and combining in millimeter wave MIMO systems". In: 2015 IEEE International Conference on Communications (ICC). IEEE, London, pp. 1340-1345. ISBN 9781467364324. DOI: 10.1109/ICC.2015.7248509
• Méndez-Rial, Roi, Rusu, Cristian, González-Prelcic, Nuria and Heath, Robert W. (2015) "Dictionary-free hybrid precoders and combiners for mmWave MIMO systems". In: 2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC). IEEE, Stockholm, pp. 151-155. ISBN 9781479919314. DOI: 10.1109/SPAWC.2015.7227018
• Dumitrescu, Bogdan, Rusu, Cristian, Tabus, loan and Astola, Jaakko (2015) "Low-complexity robust DOA estimation". In: 2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, Brisbane, QLD, pp. 2794-2798. ISBN 9781467369978. DOI: 10.1109/ICASSP.2015.7178480
• Rusu, Cristian, González-Prelcic, Nuria and Heath, Robert W. (2015) "An attack on antenna subset modulation for millimeter wave communication". In: 2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, Brisbane, QLD, pp. 2914-2918. ISBN 9781467369978. DOI: 10.1109/ICASSP.2015.7178504
• Minervini, Massimo, Rusu, Cristian and Tsaftaris, Sotirios A. (2015) "Computationally Efficient Data and Application Driven Color Transforms for the Compression and Enhancement of Images and Video". In: Color Image and Video Enhancement. Springer, Cham, Switzerland, pp. 371-393. ISBN 9783319093635. DOI: 10.1007/978-3-319-09363-5_13
• Rusu, Cristian and Dumitrescu, Bogdan (2014) "An initialization strategy for the dictionary learning problem". In: 2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, Florence, pp. 6731-6735. ISBN 9781479928934. DOI: 10.1109/ICASSP.2014.6854903
• Rusu, Cristian and Tsaftaris, Sotirios A. (2014) "Structured Dictionaries for Ischemia Estimation in Cardiac BOLD MRI at Rest". In: Medical Image Computing and Computer-Assisted Intervention – MICCAI 2014. Lecture Notes in Computer Science, 8674 . Springer, Cham, Switzerland, pp. 562-569. ISBN 9783319104706. DOI: 10.1007/978-3-319-10470-6_70
• Minervini, Massimo, Rusu, Cristian and Tsaftaris, Sotirios A. (2014) "Unsupervised and supervised approaches to color space transformation for image coding". In: 2014 IEEE International Conference on Image Processing (ICIP). IEEE, Paris, pp. 5576-5580. ISBN 9781479957514. DOI: 10.1109/ICIP.2014.7026128
• Rusu, Cristian and Dumitrescu, Bogdan (2013) "Block orthonormal overcomplete dictionary learning". In: 21st European Signal Processing Conference (EUSIPCO 2013). IEEE, Marrakech, pp. 1-5. ISBN 9780992862602. 
• Rusu, Cristian and Tsaftaris, Sotirios A. (2013) "Estimation of scribble placement for painting colorization". In: 2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA). IEEE, Trieste, pp. 564-569. ISBN 9789531841948. DOI: 10.1109/ISPA.2013.6703804
• Minervini, Massimo, Rusu, Cristian and Tsaftaris, Sotirios A. (2013) "Learning computationally efficient approximations of complex image segmentation metrics". In: 2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA). IEEE, Trieste, pp. 60-65. ISBN 9789531841948. DOI: 10.1109/ISPA.2013.6703715
• Rusu, Cristian (2012) "Fast design of efficient dictionaries for sparse representations". In: 2012 IEEE International Workshop on Machine Learning for Signal Processing. IEEE, Santander, pp. 1-5. ISBN 9781467310260. DOI: 10.1109/MLSP.2012.6349795
• Rusu, Cristian (2012) "Clustering before training large datasets — Case study: K-SVD". In: 2012 Proceedings of the 20th European Signal Processing Conference (EUSIPCO). IEEE, Bucharest, pp. 2188-2192. ISBN 9781467310680.