Publications
List of Publications
Journals
- [J50] A. Magbool, V. Kumar, A. Bazzi, M. F. Flanagan, and M. Chafi “Multi-Functional RIS for a Multi-Functional System: Integrating Sensing, Communication, and Wireless Power Transfer,” in IEEE Network, 2024.
- [J49] R. Bomfin and M. Chafii. “Unique Word-Based Frame Design for Bistatic Integrated Sensing and Communication,” in IEEE Transactions on Wireless Communications, 2024.
- [J48] R. Bomfin and M. Chafii. “On the Performance Analysis of Zero-Padding OFDM for Monostatic ISAC Systems,” in IEEE Transactions on Communications, 2024.
- [J47] K. Ali, M. Hanggi, A. Dweik, and M. Chafii. “Impact of Network Geometry on Large Networks with Intelligent Reflecting Surfaces,” in IEEE Transactions on Vehicular Technology, 2024.
- [J46] S. Naoumi, A Bazzi, R. Bomfinn, and M. Chafii, “Complex Neural Network based Joint AoA and AoD Estimation for Bistatic ISAC,” in IEEE Journal of Selected Topics in Signal Processing, 2024.
- [J45] A. Chowdary, A. Bazzi, and M. Chafii, “On Hybrid Radar Fusion for Integrated Sensing and Communication,” in IEEE Transactions on Wireless Communications, 2024.
- [J44] A. Bazzi and M. Chafii, “Secure Full Duplex Integrated Sensing and Communications,” in IEEE Transactions on Information Forensics & Security, 2024.
- [J43] A. W. Azim, A. Bazzi, R. Shubair and M. Chafii, “Chirp Spread Spectrum-based Waveform Design and Detection Mechanisms for LPWAN-based IoT – A Survey,” in IEEE Access, 2024.
- [J42] K. Ali, A. Al-Dweik, E. Hossain and M. Chafii, “Physical Layer Security of Partial-NOMA and NOMA in Poisson Networks,” in IEEE Transactions on Wireless Communications, 2023.
- [J41] A. Gizzni and M. Chafii, “RNN Based Channel Estimation in Doubly Selective Environments,” in IEEE Transactions on Machine Learning in Communications and Networking, 2023.
- [J40] A. Azim, A. Bazzi, R. Bomfin, R. Shubair and M. Chafii, “Layered Chirp Spread Spectrum Modulations for LPWANs,” in IEEE Transactions on Communications, 2023.
- [J39] R. Bomfin and M. Chafii, “Sparse-DFT and WHT Precoding with Iterative Detection for Highly Frequency-Selective Channels,” in IEEE Transactions on Wireless Communications, 2023.
- [J38] M. Chafii, S. Naoumi, R. Alami, E. Almazrouei, M. Bennis and M. Debbah, “Emergent Communication in Multi-Agent Reinforcement Learning for Future Wireless Networks,” in IEEE Internet of Things Magazine, 2023.
- [J37] A. W. Azim, A. Bazzi, F. Mahrukh, R. Shubair and M. Chafii, “Dual-Mode Time Domain Multiplexed Chirp Spread Spectrum,” in IEEE Transactions on Vehicular Technology, 2023.
- [J36] S. A. U. Haq, A. K. Gizzini, S. Shrey, S. J. Darak, S. Saurabh and M. Chafii, “Deep Neural Network Augmented Wireless Channel Estimation for Preamble-Based OFDM PHY on Zynq System on Chip,” in IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 2023.
- [J35] A. Bazzi and M. Chafii, “On Integrated Sensing and Communication Waveforms with Tunable PAPR,” in IEEE Transactions on Wireless Communications, 2023.
- [J34] M. Chafii, L. Bariah, S. Muhaidat and M. Debbah, “Twelve Scientific Challenges for 6G: Rethinking the Foundations of Communications Theory,” in IEEE Communications Surveys & Tutorials, 2023.
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[J33] A. Bazzi and M. Chafii, “On Outage-based Beamforming Design for Dual-Functional Radar-Communication 6G Systems,” in IEEE Transactions on Wireless Communications, doi: 10.1109/TWC.2023.3235617.
- [J32] S. Dang, J. Ye, M. A. Beach and M. Chafii, “On Optimality of Gamma Approximation for Lognormal Shadowing Models,” in IEEE Antennas and Wireless Propagation Letters.
- [J31] K. S. Ali, A. Al-Dweik, E. Hossain and M. Chafii, “Meta Distribution of Partial-NOMA,” in IEEE Wireless Communications Letters, vol. 11, no. 12, pp. 2695-2699, Dec. 2022.
- [J30] A. W. Azim, A. Bazzi, R. Shubair and M. Chafii, “Dual-Mode Chirp Spread Spectrum Modulation,” in IEEE Wireless Communications Letters, vol. 11, no. 9, pp. 1995-1999, Sept. 2022.
- [J29] A. K. Gizzini and M. Chafii, “A Survey on Deep Learning Based Channel Estimation in Doubly Dispersive Environments,” in IEEE Access, vol. 10, pp. 70595-70619, 2022.
- [J28] W. Njima, A. Bazzi and M. Chafii, “DNN-Based Indoor Localization Under Limited Dataset Using GANs and Semi-Supervised Learning,” in IEEE Access, vol. 10, pp. 69896-69909, 2022.
- [J27] Q. Zhang, I. Bizon, A. Kumar, A. B. Martinez, M. Chafii and G. Fettweis, “A Novel Approach for Cancelation of Nonaligned Inter Spreading Factor Interference in LoRa Systems,” in IEEE Open Journal of the Communications Society, vol. 3, pp. 718-728, 2022.
- [J26] A. K. Gizzini and M. Chafii, “Low Complex Methods for Robust Channel Estimation in Doubly Dispersive Environments,” in IEEE Access, vol. 10, pp. 34321-34339, 2022.
- [J25] A. Chorti, A. Barreto, S. Kopsell, M. Zoli, M. Chafii, P. Sehier, G. Fettweis, V. Poor, “Context-Aware Security for 6G Wireless: The Role of Physical Layer Security,” in IEEE Communications Standards Magazine, vol. 6, no. 1, pp. 102-108, March 2022.
- [J24] A. W. Azim, J. L. G. Monsalve and M. Chafii, “Enhanced PSK-LoRa,” in IEEE Wireless Communications Letters, vol. 11, no. 3, pp. 612-616, March 2022.
- [J23] A. Karim Gizzini, M. Chafii, A. Nimr, R. M. Shubair and G. Fettweis, “CNN Aided Weighted Interpolation for Channel Estimation in Vehicular Communications,” in IEEE Transactions on Vehicular Technology, vol. 70, no. 12, pp. 12796-12811, Dec. 2021.
*** Before September 2021 ***
- [J22] Carneiro P, Mendes L, Chafii M, “Compressive Learning in Communication Systems: A Neural Network Receiver for Detecting Compressed Signals in OFDM Systems,” IEEE Access, August 2021.
- [J21] Njima W, Chafii M, Chorti A, Shubair R, Poor V, “Indoor Localization using Data Augmentation via Selective Generative Adversarial Networks,” IEEE Access, July 2021.
- [J20] Bizon I, Chafii M, Nimr A, Fettweis G, “Alternative Chirp Spread Spectrum Techniques for LPWANs,” IEEE Transactions on Green Communications and Networking, May 2021.
- [J19] Zerhouni K, Amhoud E, Chafii M, “Filtered Multicarrier Waveforms Classification: A Deep Learning Based Approach,” IEEE Access, May 2021.
- [J18] Bomfin R, Chafii M, Nimr A, Fettweis G, “A Robust Baseband Transceiver Design for Doubly-Dispersive Channels,” IEEE Transactions on Wireless Communications, February 2021.
- [J17] Azim W A, Le Guennec Y., Chafii M, and Ros L, “Filtered Asymmetrically Clipped Optical-OFDM with Index Modulation for Optical Wireless Systems,” IEEE Communications Letters, December 2020.
- [J16] Azim W A, Le Guennec Y., Chafii M, and Ros L, “LACO-OFDM with Index Modulation for Optical Wireless Systems,” IEEE Wireless Communications Letters, December 2020.
- [J15] Bomfin R, Nimr A, Chafii M, Fettweis G, “A Robust and Low-Complexity Walsh-Hadamard Modulation for Doubly-Dispersive Channels,” IEEE Communications Letters, October 2020.
- [J14] Nijma W, Chafii M, Nimr A, Fettweis G, “Deep Learning Based Data Recovery for Localization,” IEEE Access, September 2020.
- [J13] Shahab M B, Johnson S., Shirvanimoghaddam M., Chafii M, Basar E., and Dohler M, “Index Modulation Aided Uplink NOMA for Massive Machine Type Communications,” IEEE Wireless Communications Letters, August 2020.
- [J12] Azim W A, Le Guennec Y., Chafii M, and Ros L, “Enhanced Optical-OFDM with Index and Dual-Mode Modulation for Optical Wireless Systems,” IEEE Access, July 2020.
- [J11] Gizzini A, Chafii M, Nimr A, Fettweis G, “Deep Learning Based Channel Estimation Schemes for IEEE 802.11p Standard,” IEEE Access, June 2020.
- [J10] Ehsanfar S, Chafii M, Fettweis G, “On UW-based Transmission for MIMO Multi-Carriers with Spatial Multiplexing,” IEEE Transactions on Wireless Communications, June 2020.
- [J9] Azim W A, Chafii M, Le Guennec Y., and Ros L, “Spectral and Energy Efficient Fast-OFDM with Index Modulation for Optical Wireless Systems,” IEEE Communications Letters, April 2020.
- [J8] Bomfin A, Chafii M, and Fettweis G, “A Novel Iterative Receiver Design for CP-free Transmission under Frequency-Selective Channels,” IEEE Communications Letters, December 2019.
- [J7] Nimr A, Chafii M, and Fettweis G, “Unified Low Complexity Radix-2 Architectures for Time and Frequency-domain GFDM Modem,” IEEE Circuits and Systems Magazine, November 2018.
- [J6] Ehsanfar S, Matthe M, Chafii M, and Fettweis G, “Pilot- and CP-aided Channel Estimation in MIMO Non-Orthogonal Multi-Carriers,” IEEE Transactions on Wireless Communications, December 2018.
- [J5] Chafii M, Palicot J, Gribonval R, and Bader F, “Adaptive Wavelet Packet Modulation,” IEEE Transactions on Communications, February 2018.
- [J4] Chafii M, Coon J, and Hedges D, “DCT-OFDM with Index Modulation,” IEEE Communications Letters, March 2017.
- [J3] Chafii M, Palicot J, Gribonval R, “Wavelet modulation : An alternative modulation with low energy consumption,” Comptes Rendus Physique, 18(2) :156 – 167, 2017. Energy and radiosciences.
- [J2] Chafii M, Palicot J, Gribonval R, “A Necessary Condition for Designing Waveforms with better PAPR than OFDM,” IEEE Transactions on Communications, August 2016
- [J1] Chafii M, Palicot J, Gribonval R, “Closed-form approximations of the peak-to-average power ratio distribution for multi-carrier modulation and their applications,” EURASIP Journal on Advances in Signal Processing 2014 2014:121.
International Conferences
- [C64] R. Bomfin and M. Chafii, “Unique Word-Based Frame Design for Bistatic ISAC with Time-Domain Filtering,” IEEE GLOBECOM, 2024.
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[C63] O. M. Atsu, S. Naoumi, R. Bomfin, and M. Chafii, “Reinforcement Learning for Enhancing Sensing Estimation in Bistatic ISAC Systems with UAV Swarms,” IEEE MECOM, 2024.
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[C62] I. Bizon, A. Nimr, G. Fettweis, and M. Chafii, “Indoor Positioning Using Correlation Based Signal Analysis and Convolutional Neural Networks,” IEEE ISWCS (2024).
- [C61] R. Bomfin, A. Bazzi and M. Chafii, “A System Level Analysis for Integrated Sensing and Communication,” IEEE WCNC (2024).
- [C60] D. Wang, A. Bazzi and M. Chafii, “RIS-Enabled Integrated Sensing and Communication for 6G Systems,” IEEE WCNC (2024).
- [C59] H. Poddar, A. Chowdary, T. Rappaport and M. Chafii M, “Full-Stack End-to-End Sub-THz Simulations at 140 GHz using NYUSIM Channel Model in ns-3,” IEEE WCNC (2024).
- [C58] K. Ali, R. Bomfin and M. Chafii, “Successive Interference Cancellation for ISAC in a Large Full-Duplex Cellular Network,” IEEE WCNC (2024).
- [C57] S. Naoumi, A. Bazzi, R. Bomfin and M. Chafii, “Deep Learning-Enabled Angle Estimation in Bistatic ISAC Systems,” IEEE GLOBECOM Wkshps (2023).
- [C56] Ali K, Chafii M, “A Dynamic Transmission Strategy for ISAC in Large Networks,” IEEE GLOBECOM (2023).
- [C55] Kumar V, Chafii M, Swindlehurst L, Tran L, Flanagan M, “SCA-Based Beamforming Optimization for IRS-Enabled Secure Integrated Sensing and Communication,” IEEE GLOBECOM (2023).
- [C54] Naoumi S, Alami R, Hacid H, Almazrouei E, Debbah M, Bennis M, Chafii M, “Emergent Communication in Multi-Agent Reinforcement Learning for Flying Base Stations,” IEEE MeditCom (2023).
- [C53] Chowdary A, Bazzi A, Chafii M, “Uplink and Downlink Communications Fusion for Enhanced Radar Sensing,” IEEE SPAWC (2023).
- [C52] Mamady D, Bazzi A, Chafii M, Amhoud M., “Deep Learning-based Estimation for Multitarget Radar Detection,” IEEE VTC-Spring (2023).
- [C51] Bazzi A, Chafii M., “Robust Integrated Sensing and Communication Beamforming for Dual-functional Radar and Communications: Method and Insights,” URSI GASS (2023).
- [C50] Ehsanfar S, Bazzi A, K Moessner, Chafii M., “Hypothesis Testing on FMCW and OFDM for Joint Communication and Radar in IEEE 802.11bd,” IEEE ICC Workshops, Rome, Italy (Mai 2023).
- [C49] A. Gizzini, M. Chafii, “Deep Learning Based Channel Estimation In High Mobility Communications Using Bi-RNN Networks,” IEEE ICC, Rome, Italy, 2023.
- [C48] I. Bizon, A. Nimr, P. Schulz, M. Chafii, G. Fettweis, “Blind Transmitter Localization Using Deep Learning: A Scalability Study,” IEEE WCNC, Glasgow, Scoltand, 2023.
- [C47] R. Bomfin, M. Chafii, A. Nimr and G. Fettweis, “Maximum a-Posteriori Equalizer for Sparse Walsh Hadamard Modulation,” IEEE GLOBECOM, Rio de Janeiro, Brazil, 2022;
- [C46] I. Bizon, Z. Li, A. Nimr, M. Chafii and G. P. Fettweis, “Experimental Performance of Blind Position Estimation Using Deep Learning,” IEEE GLOBECOM, Rio de Janeiro, Brazil, 2022.
- [C45] M. Sigmund, R. Bomfin, M. Chafii, A. Nimr and G. Fettweis, “Waveform Design for Power-Domain Asynchronous NOMA,” IEEE VTC-Spring, Helsinki, Finland, 2022;
- [C44] S. Ehsanfar, K. Moessner, A. K. Gizzini and M. Chafii, “Performance Comparison of IEEE 802.11p, 802.11bd-draft and a Unique-Word-based PHY in Doubly-Dispersive Channels,” IEEE WCNC, Austin, TX, USA, 2022.
- [C43] M. Sigmund, R. Bomfin, M. Chafii, A. Nimr and G. Fettweis, “Iterative Receiver for Power-Domain NOMA with Mixed Waveforms,” IEEE WCNC, Austin, TX, USA, 2022.
- [C42] A. K. Gizzini, M. Chafii, S. Ehsanfar and R. M. Shubair, “Temporal Averaging LSTM-based Channel Estimation Scheme for IEEE 802.11p Standard,” IEEE GLOBECOM), Madrid, Spain, 2021.
- [C41] W. Njima, M. Chafii and R. M. Shubair, “GAN Based Data Augmentation for Indoor Localization Using Labeled and Unlabeled Data,” 2021 International Balkan Conference on Communications and Networking (BalkanCom), Novi Sad, Serbia, 2021, pp. 36-39.
*** Before September 2021 ***
- [C40] AlHajri M, Shubair R, Chafii M, “Indoor Localization Under Limited Measurements: A Cross-Environment Joint Semi-Supervised and Transfer Learning Approach,” IEEE SPAWC (September 2021).
- [C39] Bizon Ivo, Chafii M, Nimr A, Fettweis G, “Blind Transmitter Localization in Wireless Sensor Networks: A Deep Learning Approach,” IEEE PIMRC (September 2021).
- [C38] Bomfin R, Chafii M, Nmr A, Fettweis G, “Channel Estimation for MIMO Space Time Coded OTFS under Doubly Selective Channels,” IEEE ICC 2021 Workshops, Montreal, Canada.
- [C37] Martinez A, Kumar A, Chafii M, Fettweis G, “Sequence Design for Frame Detection Based on Autocorrelation,” IEEE VTC-Spring (Helsinki, Finland, April 2021).
- [C36] Amhoud E, Chafii M, Nimr A, Fettweis G, “OFDM with Index Modulation in Orbital Angular Momentum Multiplexed Free Space Optical Links,” IEEE VTC-Spring (Helsinki, Finland, April 2021).
- [C35] Njima W, Chafii M, Nimr A, Fettweis G, “Convolutional Neural Networks based Denoising for Indoor Localization,” IEEE VTC-Spring (Helsinki, Finland, April 2021).
- [C34] Gizzini A, Chafii M, Nimr A, Fettweis G, “Joint TRFI and Deep Learning for Vehicular Channel Estimation,” IEEE GLOBECOM Workshops (Taipei, Taiwan, December 2020).
- [C33] Bizon Ivo, Chafii M, Nimr A, Fettweis G, “In-phase and Quadrature Chirp Spread Spectrum for IoT Communications,” IEEE GLOBECOM (Taipei, Taiwan, December 2020).
- [C32] Gizzini A, Chafii M, Nimr A, Fettweis G, “Adaptive Channel Estimation based on DeepLearning,” IEEE VTC-fall (Victoria, Canada, October 2020).
- [C31] Martinez A, Kumar A, Chafii M, Fettweis G, “A New Approach for Enhanced Detection Using Chirp Reference Signals,” IEEE VTC-fall (Victoria, Canada, October 2020).
- [C30] Martinez A, Kumar A ,Chafii M, Fettweis G, “A New Approach for Accurate Time Synchronization Using Chirp Signals,” IEEE VTC-spring (Antwrep, Belgium, May 2020).
- [C29] Gizzini A, Chafii M, Nimr A, Fettweis G, “Enhancing Least Square Channel Estimation Using Deep Learning,” IEEE VTC-spring (Antwrep, Belgium, May 2020).
- [C28] Ehsanfar S, Chafii M, Fettweis G, “A Study on Unique-Word based Synchronization for MIMO Systems over Time-Varying Channels,” IEEE WCNC (Seoul, Korea, April 2020).
- [C27] Martinez A, Kumar A, Chafii M, Fettweis G, “A Chirp-Based Frequency Synchronization Approach for Flat Fading Channels,” 6G Wireless Summit (Levi, Finland, March 2020).
- [C26] Ehsanfar S, Chafii M, Fettweis G, “A Frame Design for MIMO UW based Systems: Overhead Analysis & Channel Estimation,” IEEE 5G World Forum (Dresden, Germany, September 2019).
- [C25] Bomfin R, Chafii M, Fettweis G, “Performance Assessment of Orthogonal Chirp Division Multiplexing in MIMO Space Time Coding,” IEEE 5G World Forum (Dresden, Germany, September 2019).
- [C24] Fadel A, Nimr A, Chiang H, Chafii M, Cousin B, “Cross-Layer Multi-User Selection in 5G Heterogeneous Networks Based on Hybrid Beamforming Optimization for Millimeter-Wave,” IEEE PIMRC (Istanbul, Turkey, September 2019).
- [C23] Danneberg D, Li Z, Nimr A, Ehsanfar S, Chafii M, Fettweis G, “Real-Time Waveform Prototyping,” IEEE SPAWC (Cannes, France, July, 2019).
- [C22] Ehsanfar S, Chafii M, Fettweis G, “Time-Variant Pilot- and CP-Aided Channel Estimation for GFDM,” IEEE ICC (Shanghai, China, Mai 2019).
- [C21] Bomfin R, Chafii M, Fettweis G, “A Novel Modulation for IoT : PSK-LoRa,” IEEE VTC-spring (Kuala Lumpur, Malaisia, Mai 2019).
- [C20] Nimr A, Chafii M, Fettweis G, “Precoded-OFDM within GFDM Framework,” IEEE VTC-spring (Kuala Lumpur, Malaisia, Mai 2019).
- [C19] Bomfin R, Chafii M, Fettweis G, “Low-Complexity Iterative Receiver for Orthogonal Chirp Division Multiplexing,” IEEE WCNC (Marrakech, Morocco, April 2019).
- [C18] Nimr A, Chafii M, Fettweis G, “Low-Complexity Transceiver for GFDM systems with Partially Allocated Subcarriers,” IEEE WCNC (Marrakech, Morocco, April 2019).
- [C17] Mancovasquez J, Chafii M, and Faouzi B, “Tailoring Index-Modulation for uplink IoT and M2M Networks,” IEEE WCNC (Marrakech, Morocco, April 2019).
- [C16] Danneberg M, Bomfin, Ehsanfar S, Nimr A, Lin Z, Chafii M, Fettweis G, “Online Wireless Lab Testbed,” IEEE WCNC (Marrakech, Morocco, April 2019).
- [C15] Martinez A, Maximilian M, Chafii M, Fettweis G, “Blind Carrier Frequency Offset Estimation in Generalized Frequency Division Multiplexing,” IEEE ICNC (Honolulu, Hawaii, United States, February 2019).
- [C14] Nimr A, Chafii M, Fettweis G, “Practical GFDM-based Linear Receivers,” IEEE SCC (Rostock, Germany, February 2019).
- [C13] Nimr A, Chafii M, Maximilian M, Fettweis G, “Extended GFDM Framework: OTFS and GFDM Comparison,” IEEE GLOBECOM (Abu Dhabi, UAE, December 2018).
- [C12] Dias W, Gaspar D M, Mendes L, Maximilian M, Neuhaus P, Fettweis G, “Performance Analysis of a 5G Transceiver Implementation for Remote Areas Scenarios,” EuCNC (Ljubljana, Slovenia, 2018).
- [C11] Chafii M, Palicot J, Gribonval R, Faouzi B, “Fourier Based Adaptive Waveform,” ICT (Saint-Malo, France, June 2018).
- [C10] Chafii M, Faouzi B, Palicot J, “Enhancing Coverage in Narrow Band-IoT Using Maching Learning,” IEEE WCNC (Barcelona, Spain, 2017).
- [C9] Chafii M, Faouzi B, Palicot J, “SC-FDMA with Index Modulation for M2M and IoT Uplink Applications,” IEEE WCNC (Barcelona, Spain, 2017).
- [C8] Benmebrouk M, Chafii M, Louet Y, and Faouzi B, “A Precoding-based PAPR Reduction Technique for UF-OFDM and Filtered-OFDM Modulations in 5G Systems,” URSI, GASS, 2017 Montréal, Canada.
- [C7] Benmebrouk M, Chafii M, Louet Y, and Faouzi B, “Low-PAPR condition for 5G-Candidate Waveforms,” European Wireless (EW) 2017, Dresden, Germany.
- [C6] Chafii M, Palicot J, Gribonval R, Burr A, “Power Spectral Density Limitations of the Wavelet-OFDM System,” EUSIPCO (Budapest, Hungary, 2016).
- [C5] L. Diallo, Chafii M, Faouzi B, Palicot J, “Modified Tone Reservation for PAPR Reduction in OFDM Systems,” EUSIPCO (Budapest, Hungary, 2016).
- [C4] Chafii M, Y. Harbi, Burr A, “Wavelet-OFDM vs. OFDM : Performance Comparison,” ICT (Thessaloniki, Greece, 2016).
- [C3] Chafii M, L. Diallo, Palicot J, “Adaptive Tone-Reservation for better BER Performance in a Frequency Selective Fading Channel,” IEEE VTC-Spring (Nanjing, China, 2016).
- [C2] Chafii M, Palicot J, Gribonval R, “Closed-Form Approximations of the PAPR Distribution for Multi-Carrier Modulation Systems,” EUSIPCO (Lisbon, Portugal, 2014).
- [C1] Chafii M, Palicot J, Gribonval R, “A PAPR upper bound of Generalized Waveforms for Multi-Carrier modulation systems,” in ISCCSP, 6th International Symposium on Communications, Control and Signal Processing (Athens, 2014).