Emmanouel A. Varvarigos

279 papers A* 2A 2B 30C 15Misc 5Journal 108Unranked 115

Year	Rank	Type	Title / Venue / Authors
2026	J	`jnl`	Multi-objective hierarchical edge infrastructure design for service chain workloads: A MOEA/D-driven joint planning and operation approach. Comput. Networks Georgios Kontos, Polyzois Soumplis, Prodromos Makris, Emmanouel A. Varvarigos
2025	J	`jnl`	A Self-driven Virtual Elastic Infrastructure For Cell-free Based 6G Networks. IEEE Wirel. Commun. John S. Vardakas, Polyzois Soumplis, Panagiotis C. Kokkinos, Simon Pryor, Philippe Chanclou, Emmanouel A. Varvarigos, Kostas Ramantas, Christos V. Verikoukis
2025	B	`conf`	Distributed Task Scheduling in Collaborative Edge Infrastructures with Graph Reinforcement Learning. GLOBECOM Panagiotis Kokkinakis, Polyzois Soumplis, Emmanouel A. Varvarigos
2025	—	`conf`	Dynamic Risk-Aware Reconfiguration in Coherent P2MP Extended Access Networks Under Time-Varying Demands. ECOC Polyzois Soumplis, Konstantinos Christodoulopoulos, Antonio Napoli, Konstantinos Yiannopoulos, Emmanouel A. Varvarigos
2025	J	`jnl`	Enabling extended access aggregation with light-trees and point-to-multipoint coherent transceivers. J. Opt. Commun. Netw. Polyzois Soumplis, Konstantinos Christodoulopoulos, Panagiotis C. Kokkinos, Antonio Napoli, Mohammad M. Hosseini, Konstantinos Yiannopoulos, Emmanouel A. Varvarigos
2025	—	`conf`	Energy-Efficient and User-Centric AP Clustering in Cell-free Massive MIMO Networks. CSCN David Rodrigues, Georgios Kontos, Prodromos Makris, Emmanouel A. Varvarigos
2025	J	`jnl`	Equilibrium Analysis of Day-Ahead Electricity Markets With Strategic Demand Aggregators Based on the Theory of Learning in Games. IEEE Access Alireza Khaksari, Konstantinos Steriotis, Prodromos Makris, Georgios Tsaousoglou, Elissaios Sarmas, Vangelis Marinakis, Emmanouel A. Varvarigos
2025	J	`jnl`	Online Menu-Based Scheduling of Electric Vehicle Charging. IEEE Trans. Smart Grid Angeliki Mathioudaki, Georgios Tsaousoglou, Emmanouel A. Varvarigos, Dimitris Fotakis
2025	J	`jnl`	Optimal procurement under backwardation and the benefits of the manifestation of demand aggregators. Oper. Res. Lett. Ioannis Avramopoulos, Prodromos Makris, Emmanouel A. Varvarigos
2025	C	`conf`	Optimization of Cloud-Native Application Execution over the Edge-Cloud Continuum Enabled by DVFS. CLOSER Georgios Kontos, Polyzois Soumplis, Emmanouel A. Varvarigos
2025	—	`conf`	Risk-Aware Resource Allocation in Edge Computing Using Stochastic Forecasting. ICC Panagiotis Kokkinakis, Polyzois Soumplis, Emmanouel A. Varvarigos
2025	J	`jnl`	Safe Bottom-Up Flexibility Provision from Distributed Energy Resources. CoRR Costas Mylonas, Emmanouel A. Varvarigos, Georgios Tsaousoglou
2024	J	`jnl`	Anomaly Detection in Cloud Computing using Knowledge Graph Embedding and Machine Learning Mechanisms. J. Grid Comput. Katerina Mitropoulou, Panagiotis C. Kokkinos, Polyzois Soumplis, Emmanouel A. Varvarigos
2024	—	`conf`	Dynamic Edge/Cloud Resource Allocation for Distributed Computation Under Semi-Static Demands. ICC Ippokratis Sartzetakis, Panagiotis Pantazopoulos, Konstantinos V. Katsaros, Vasilis Sourlas, Emmanouel A. Varvarigos
2024	A	`conf`	EMPYREAN: Trustworthy, Cognitive and AI-driven Collaborative Associations of IoT Devices and Edge Resources for Data Processing. HPDC Aristotelis Kretsis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos, Dimitris Syrivelis, Paraskevas Bakopoulos, Márton Sipos, Marcell Fehér, Daniel Enrique Lucani, José Manuel Bernabé Murcia, Antonio F. Skarmeta, Ivan Paez, Luca Cominardi, Michael Mercier, Pedro Velho, Yiannis Georgiou, Charalampos Mainas, Anastassios Nanos, Javier Martin, Aitor Fernández Gómez, Roberto Gonzalez, Panos Ilias, Theodoros Chalazas, Keshav Chintamani
2024	J	`jnl`	Edge/Cloud Infinite-Time Horizon Resource Allocation for Distributed Machine Learning and General Tasks. IEEE Trans. Netw. Serv. Manag. Ippokratis Sartzetakis, Polyzois Soumplis, Panagiotis Pantazopoulos, Konstantinos V. Katsaros, Vasilis Sourlas, Emmanouel A. Varvarigos
2024	B	`conf`	Optimization of Resource Deployment and Configuration in Hierarchical Edge Topologies. GLOBECOM Georgios Kontos, Polyzois Soumplis, Emmanouel A. Varvarigos
2023	C	`conf`	Cloud-Native Applications' Workload Placement over the Edge-Cloud Continuum. CLOSER Georgios Kontos, Polyzois Soumplis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2023	J	`jnl`	Deploying cloud-native experimental platforms for zero-touch management 5G and beyond networks. IET Networks Sergio Barrachina-Muñoz, Rasoul Nikbakht, Jorge Baranda, Miquel Payaró, Josep Mangues-Bafalluy, Panagiotis C. Kokkinos, Polyzois Soumplis, Aristotelis Kretsis, Emmanouel A. Varvarigos
2023	—	`conf`	Efficient Resource Provisioning in Critical Infrastructures Based on Multi-Agent Rollout Enabled by Deep Q-Learning. ISVC (1) Polyzois Soumplis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2023	B	`conf`	Hardware-Accelerated FaaS for the Edge-Cloud Continuum. ICNP Anastassios Nanos, Aristotelis Kretsis, Charalampos Mainas, George Ntouskos, Aggelos Ferikoglou, Dimitrios Danopoulos, Argyris Kokkinis, Dimosthenis Masouros, Kostas Siozios, Polyzois Soumplis, Panagiotis C. Kokkinos, Juan Jose Vegas Olmos, Emmanouel A. Varvarigos
2023	J	`jnl`	Network Tomography with Partial Topology Knowledge and Dynamic Routing. J. Netw. Syst. Manag. Ippokratis Sartzetakis, Emmanouel A. Varvarigos
2023	J	`jnl`	Secure Distributed Storage Orchestration on Heterogeneous Cloud-Edge Infrastructures. IEEE Trans. Cloud Comput. Konstantinos Kontodimas, Polyzois Soumplis, Aristotelis Kretsis, Panagiotis C. Kokkinos, Marcell Fehér, Daniel E. Lucani, Emmanouel A. Varvarigos
2023	—	`conf`	Security-Aware Resource Allocation in the Edge-Cloud Continuum. CloudNet Polyzois Soumplis, Georgios Kontos, Aristotelis Kretsis, Panagiotis C. Kokkinos, Anastassios Nanos, Emmanouel A. Varvarigos
2023	—	`conf`	Use Cases Employing a Machine Learning Network Architecture. AIAI (Workshops) Ioannis P. Chochliouros, John S. Vardakas, Christos V. Verikoukis, Md. Arifur Rahman, Andrea P. Guevara, Robbert Beerten, Philippe Chanclou, Roberto Gonzalez, Charalambos Klitis, Pierangela Samarati, Polyzois Soumplis, Emmanouel A. Varvarigos, Dimitrios Kritharidis, Kostas Chartsias, Christina Lessi
2022	J	`jnl`	Demand Response as a Service: Clearing Multiple Distribution-Level Markets. IEEE Trans. Cloud Comput. Georgios Tsaousoglou, Polyzois Soumplis, Nikolaos Efthymiopoulos, Konstantinos Steriotis, Aristotelis Kretsis, Prodromos Makris, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2022	—	`conf`	Detect Resource Related Events in a Cloud-Edge Infrastructure using Knowledge Graph Embeddings and Machine Learning. CSNDSP Katerina Mitropoulou, Panagiotis C. Kokkinos, Polyzois Soumplis, Emmanouel A. Varvarigos
2022	J	`jnl`	Efficiency and fairness improvement for elastic optical networks using reinforcement learning-based traffic prediction. JOCN Anastasios Valkanis, Georgios Papadimitriou, Georgia A. Beletsioti, Emmanouel A. Varvarigos, Petros Nicopolitidis
2022	J	`jnl`	Flexibility Aggregation of Temporally Coupled Resources in Real-Time Balancing Markets Using Machine Learning. IEEE Trans. Ind. Informatics Georgios Tsaousoglou, Ippokratis Sartzetakis, Prodromos Makris, Nikolaos Efthymiopoulos, Emmanouel A. Varvarigos, Nikolaos G. Paterakis
2022	B	`conf`	Machine Learning Network Tomography with partial topology knowledge and dynamic routing. GLOBECOM Ippokratis Sartzetakis, Emmanouel A. Varvarigos
2022	J	`jnl`	Multistage Energy Management of Coordinated Smart Buildings: A Multiagent Markov Decision Process Approach. IEEE Trans. Smart Grid Georgios Tsaousoglou, Nikolaos Efthymiopoulos, Prodromos Makris, Emmanouel A. Varvarigos
2022	—	`conf`	Resource Allocation Challenges in the Cloud and Edge Continuum. Honoring Professor Mohammad S. Obaidat Polyzois Soumplis, Panagiotis C. Kokkinos, Aristotelis Kretsis, Petros Nicopolitidis, Georgios Papadimitriou, Emmanouel A. Varvarigos
2021	—	`conf`	A Traffic Prediction assisted Routing Algorithm for Elastic Optical Networks. CCCI Anastasios Valkanis, Georgios Papadimitriou, Petros Nicopolitidis, Georgia A. Beletsioti, Emmanouel A. Varvarigos
2021	B	`conf`	An SDN Emulation Platform for Converged Fiber-Wireless 5G Networks. ICCCN Aristotelis Kretsis, Polyzois Soumplis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2021	J	`jnl`	Circularity and Sustainability in Modern Smart Grids Through Innovative Energy Market Architectures. ERCIM News Nikolaos Efthymiopoulos, Prodromos Makris, Emmanouel A. Varvarigos
2021	—	`conf`	Machine Learning-Based, Networking and Computing Infrastructure Resource Management. AIAI (Workshops) Ioannis P. Chochliouros, Alexandros Kostopoulos, Miquel Payaró, Christos V. Verikoukis, Sabrina De Capitani di Vimercati, Evgenii Vinogradov, Vida Ranjbar, John S. Vardakas, Md. Arifur Rahman, Polyzois Soumplis, Emmanouel A. Varvarigos
2021	—	`conf`	Secure Distributed Storage on Cloud-Edge Infrastructures. CloudNet Konstantinos Kontodimas, Polyzois Soumplis, Aristotelis Kretsis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2021	—	`conf`	Towards Efficient HW Acceleration in Edge-Cloud Infrastructures: The SERRANO Approach - Invited Paper. SAMOS Aggelos Ferikoglou, Ioannis Oroutzoglou, Argyris Kokkinis, Dimitrios Danopoulos, Dimosthenis Masouros, Efthymios Chondrogiannis, Aitor Fernández Gómez, Aristotelis Kretsis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos, Kostas Siozios
2020	—	`conf`	A Learning Automata-based Algorithm for Energy-efficient Elastic Optical Networks. ICETE (1) Georgia A. Beletsioti, Georgios I. Papadimitriou, Petros Nicopolitidis, Emmanouel A. Varvarigos, Stathis B. Mavridopoulos
2020	J	`jnl`	A Learning-Automata-Based Congestion-Aware Scheme for Energy-Efficient Elastic Optical Networks. IEEE Access Georgia A. Beletsioti, Georgios I. Papadimitriou, Petros Nicopolitidis, Emmanouel A. Varvarigos, Stathis B. Mavridopoulos
2020	—	`conf`	Adapting Spectrum Resources using Predicted IP Traffic in Optical Networks. ICETE (1) Constantine A. Kyriakopoulos, Petros Nicopolitidis, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2020	J	`jnl`	Disaster Recovery Layer for Distributed OpenStack Deployments. IEEE Trans. Cloud Comput. Luis Tomás, Panagiotis C. Kokkinos, Vasilios Anagnostopoulos, Oshrit Feder, Dimosthenis Kyriazis, Kalman Z. Meth, Emmanouel A. Varvarigos, Theodora A. Varvarigou
2020	J	`jnl`	Exploiting IP-layer traffic prediction analytics to allocate spectrum resources using swarm intelligence. Int. J. Commun. Syst. Constantine A. Kyriakopoulos, Petros Nicopolitidis, Georgios Papadimitriou, Emmanouel A. Varvarigos
2020	J	`jnl`	Hop distance-based bandwidth allocation technique for elastic optical networks. Int. J. Commun. Syst. Stathis B. Mavridopoulos, Georgia A. Beletsioti, Petros Nicopolitidis, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2020	—	`conf`	Network Slicing and Workload Placement in Megacities. ICTON Polyzois Soumplis, Panagiotis C. Kokkinos, Dimitris T. Lagos, Aristotelis Kretsis, Vasileios Sourlas, Emmanouel A. Varvarigos
2020	J	`jnl`	PNET "ONDM 2019" special issue. Photonic Netw. Commun. Anna Tzanakaki, Emmanouel A. Varvarigos, Raul Muñoz, Reza Nejabati, Noboru Yoshikane, Markos P. Anastasopoulos
2020	—	`conf`	Reinforcement Learning in Traffic Prediction of Core Optical Networks using Learning Automata. CCCI Anastasios Valkanis, Georgia A. Beletsioti, Petros Nicopolitidis, Georgios Papadimitriou, Emmanouel A. Varvarigos
2020	—	`conf`	Soft Failure Detection, Categorization and Localization. ICTON Katerina Mitropoulou, Ippokratis Sartzetakis, Emmanouel A. Varvarigos
2020	J	`jnl`	Truthful, Practical and Privacy-Aware Demand Response in the Smart Grid via a Distributed and Optimal Mechanism. IEEE Trans. Smart Grid Georgios Tsaousoglou, Konstantinos Steriotis, Nikolaos Efthymiopoulos, Prodromos Makris, Emmanouel A. Varvarigos
2019	—	`conf`	A Novel Hop-distance Sensitive Approach to Elastic Optical Networks RSA Algorithms. ICETE (1) Stathis B. Mavridopoulos, Georgia A. Beletsioti, Georgios A. Tziroglou, Constantine A. Kyriakopoulos, Petros Nicopolitidis, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2019	—	`conf`	A Novel Research Algorithms and Business Intelligence Tool for Progressive Utility's Portfolio Management in Retail Electricity Markets. ISGT Europe Prodromos Makris, Dimitrios J. Vergados, Ioannis Mamounakis, Georgios Tsaousoglou, Konstantinos Steriotis, Nikolaos Efthymiopoulos, Emmanouel A. Varvarigos
2019	J	`jnl`	A stochastic approximation method for price-based assignment of autonomous EVs to Charging Stations. CoRR Georgios Tsaousoglou, Konstantinos Steriotis, Emmanouel A. Varvarigos
2019	J	`jnl`	Accurate Quality of Transmission Estimation With Machine Learning. JOCN Ippokratis Sartzetakis, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2019	—	`conf`	BYOD for learning and teaching in Greek Schools: Challenges and constraints according to teachers' point of view. IISA Vasileios Gkamas, Michael Paraskevas, Emmanouel A. Varvarigos
2019	J	`jnl`	Fast Energy-Efficient Design in Elastic Optical Networks Based on Signal Overlap. IEEE Access Constantine A. Kyriakopoulos, Petros Nicopolitidis, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2019	J	`jnl`	Incentive Compatibility, Scalability and Privacy in real time Demand Response. CoRR Georgios Tsaousoglou, Konstantinos Steriotis, Nikolaos Efthymiopoulos, Prodromos Makris, Emmanouel A. Varvarigos
2019	J	`jnl`	Introduction to the JOCN special issue on low-margin optical networks. JOCN Yvan Pointurier, Jean-Luc Augé, Martin Birk, Emmanouel A. Varvarigos
2019	J	`jnl`	Introduction to the JOCN special issue on low-margin optical networks: publisher's note. JOCN Yvan Pointurier, Jean-Luc Augé, Martin Birk, Emmanouel A. Varvarigos
2019	J	`jnl`	Near-optimal demand side management in retail electricity markets with coupling constraints via indirect mechanism design. CoRR Georgios Tsaousoglou, Konstantinos Steriotis, Nikolaos Efthymiopoulos, Konstantinos Smpoukis, Emmanouel A. Varvarigos
2019	J	`jnl`	Pattern-Driven Resource Allocation in Optical Networks. IEEE Trans. Netw. Serv. Manag. Panagiotis C. Kokkinos, Polyzois Soumplis, Emmanouel A. Varvarigos
2019	—	`conf`	Power-aware Algorithms for Energy-efficient Elastic Optical Backbone and Metro Networks. ICETE (1) Georgia A. Beletsioti, Stathis B. Mavridopoulos, Georgios A. Tziroglou, Constantine A. Kyriakopoulos, Georgios I. Papadimitriou, Petros Nicopolitidis, Emmanouel A. Varvarigos
2019	—	`conf`	Slotted Optical Datacenter Networks with Sub-Wavelength Resource Allocation. OFC Kostas Christodoulopoulos, Kostas Kontodimas, Lars Dembeck, Emmanouel A. Varvarigos
2018	—	`conf`	5G mm Wave Networks Leveraging Enhanced Fiber-Wireless Convergence for High-Density Environments: The 5G-PHOS Approach. BMSB Sotirios Papaioannou, George Kalfas, Christos Vagionas, Pavlos Maniotis, Amalia N. Miliou, Nikos Pleros, L. Anet Neto, Paraskevas Chanclor, M. Raj-Ali, Paraskevas Bakopoulos, Christophe Caillaud, Helene Debregeas, M. B. Sirbu, Y. Eichhammer, Eleni Theodoropoulou, George L. Lyberopoulos, Elli Kartsakli, John S. Vardakas, Guy Torfs, Xin Yin, Kostas Tsagkaris, Panagiotis Demestichas, Giannis Giannoulis, Hercules Avramopoulos, George Lentaris, Emmanouel A. Varvarigos, Idelfonso Tafur Monroy, E. Dayan, Yigal Leiba, I. Dimogiannis, A. Kontogiannis, Roberto Magri, Antonio Tartaglia, C. G. H. Roeloffzen, R. M. Oldenbeuving
2018	J	`jnl`	Digitization Era for Electric Utilities: A Novel Business Model Through an Inter-Disciplinary S/W Platform and Open Research Challenges. IEEE Access Prodromos Makris, Nikolaos Efthymiopoulos, Vassilis Nikolopoulos, Andrew Pomazanskyi, Boris Irmscher, Krassen Stefanov, Katina Pancheva, Emmanouel A. Varvarigos
2018	J	`jnl`	Efficient Network Planning for Internet of Things With QoS Constraints. IEEE Internet Things J. Ilias Gravalos, Prodromos Makris, Kostas Christodoulopoulos, Emmanouel A. Varvarigos
2018	—	`conf`	Experimental Demonstration of Fully Disaggregated White Box Including Different Types of Transponders and Monitors, Controlled by NETCONF and YANG. OFC Nicola Sambo, Kostas Christodoulopoulos, Nikolaos Argyris, Pietro G. Giardina, Camille Delezoide, Andrea Sgambelluri, Aristotelis Kretsis, Giannis Kanakis, Francesco Fresi, Giacomo Bernini, Hercules Avramopoulos, Emmanouel A. Varvarigos, Piero Castoldi
2018	J	`jnl`	Exploiting Spectrum Sharing for Soft Failure Recovery. JOCN Ippokratis Sartzetakis, Nicola Sambo, Konstantinos Christodoulopoulos, Piero Castoldi, Emmanouel A. Varvarigos
2018	—	`conf`	Field Trial of Marginless Operations of An Optical Network Facing Ageing and Performance Fluctuations. ECOC Camille Delezoide, Kostas Christodoulopoulos, Aristotelis Kretsis, Nikos Argyris, Giannis Kanakis, Andrea Sgambelluri, Nicola Sambo, Pietro G. Giardina, Giacomo Bernini, Diego Roccato, Alessandero Percelsi, Roberto Morro, Hercules Avramopoulos, Emmanouel A. Varvarigos, Piero Castoldi, Patricia Layec, Sébastien Bigo
2018	—	`conf`	Formulating QoT Estimation with Machine Learning. ECOC Ippokratis Sartzetakis, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2018	J	`jnl`	Inter-Domain Optimization and Orchestration for Optical Datacenter Networks. JOCN Giada Landi, Marco Capitani, Aristotelis Kretsis, Konstantinos Kontodimas, Panagiotis C. Kokkinos, Domenico Gallico, Matteo Biancani, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2018	—	`conf`	Joint Intra- and Inter-Datacenter Network Optimization and Orchestration. OFC Giada Landi, Marco Capitani, Aristotelis Kretsis, Panagiotis C. Kokkinos, Kostas Christodoulopoulos, Emmanouel A. Varvarigos
2018	J	`jnl`	Multi-Period Planning With Actual Physical and Traffic Conditions. JOCN Polyzois Soumplis, Konstantinos Christodoulopoulos, Marco Quagliotti, Annachiara Pagano, Emmanouel A. Varvarigos
2018	—	`conf`	Observe-Decide-Act: Experimental Demonstration of a Self-Healing Network. OFC Kostas Christodoulopoulos, Nicola Sambo, Nikolaos Argyris, Pietro G. Giardina, Giannis Kanakis, Aristotelis Kretsis, Francesco Fresi, Andrea Sgambelluri, Giacomo Bernini, Camille Delezoide, Filippo Cugini, Hercules Avramopoulos, Emmanouel A. Varvarigos
2018	J	`jnl`	Optimization Techniques for Incremental Planning of Multilayer Elastic Optical Networks. JOCN P. Papanikolaou, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2018	—	`conf`	Pre-Emptive Detection and Localization of Failures Towards Marginless Operations of Optical Networks. ICTON Camille Delezoide, Konstantinos Christodoulopoulos, Aristotelis Kretsis, Nikos Argyris, Giannis Kanakis, Andrea Sgambelluri, Nicola Sambo, Pietro G. Giardina, Giacomo Bernini, Diego Roccato, Alessandero Percelsi, Roberto Morro, Hercules Avramopoulos, Emmanouel A. Varvarigos, Piero Castoldi, Patricia Layec, Sébastien Bigo
2018	—	`conf`	Real Time Demonstration of an End-to-End Optical Datacenter Network with Dynamic Bandwidth Allocation. ECOC Konstantinos Tokas, Christos Spatharakis, Ioannis Patronas, Paraskevas Bakopoulos, Giada Landi, Konstantinos Christodoulopoulos, Marco Capitani, Angelos Kyriakos, Muzzamil Aziz, Richard Pitwon, Domenico Gallico, Dionisios I. Reisis, Emmanouel A. Varvarigos, Eitan Zahavi, Hercules Avramopoulos
2018	—	`conf`	Resource allocation in slotted optical data center networks. ONDM Kostas Kontodimas, Kostas Christodoulopoulos, Eitan Zahavi, Emmanouel A. Varvarigos
2018	C	`conf`	Scheduler Accelerator for TDMA Data Centers. PDP Ioannis Patronas, Nikolaos Gkatzios, Vasileios Kitsakis, Dionysios I. Reisis, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2018	J	`jnl`	Virtual Associations of Prosumers for Smart Energy Networks Under a Renewable Split Market. IEEE Trans. Smart Grid Nikolaos D. Doulamis, Anastasios D. Doulamis, Emmanouel A. Varvarigos
2018	B	`conf`	Virtual Resource Consolidation in the Edge for 5G Networks. PIMRC Panagiotis C. Kokkinos, Aristotelis Kretsis, Emmanouel A. Varvarigos
2017	—	`conf`	Actual margins algorithm for multi-period planning. OFC Polyzois Soumplis, Konstantinos Christodoulopoulos, Marco Quagliotti, Annachiara Pagano, Emmanouel A. Varvarigos
2017	J	`jnl`	Analysis and Evaluation of Scheduling Policies for Consolidated I/O Operations. J. Grid Comput. Konstantinos Kontodimas, Panagiotis C. Kokkinos, Yossi Kuperman, Athanasios Houbavlis, Emmanouel A. Varvarigos
2017	—	`conf`	Cross-layer and dynamic network orchestration based on optical performance monitoring. ONDM Konstantinos Christodoulopoulos, Ippokratis Sartzetakis, Polyzois Soumplis, Emmanouel A. Varvarigos
2017	J	`jnl`	Efficient Bandwidth Allocation in the NEPHELE Optical/Electrical Datacenter Interconnect. JOCN Konstantinos Christodoulopoulos, Konstantinos Kontodimas, Apostolos Siokis, Konstantinos Yiannopoulos, Emmanouel A. Varvarigos
2017	J	`jnl`	Electro-optic switches based on space switching of multiplexed WDM signals: Blocking vs non-blocking design trade-offs. Opt. Switch. Netw. Apostolos Siokis, Konstantinos Christodoulopoulos, Nikos Pleros, Emmanouel A. Varvarigos
2017	J	`jnl`	Energy-Optimal Routing on VCSEL-Based Interconnected Networks. JOCN Ilias Gravalos, Apostolos Siokis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2017	J	`jnl`	Energy-minimized design of IP over flexible optical networks. Int. J. Commun. Syst. Vasileios Gkamas, Konstantinos Christodoulopoulos, Dimitrios J. Vergados, Emmanouel A. Varvarigos
2017	—	`conf`	Experimental Demonstration of Network Automation based on QoT Estimation and Monitoring in both Single- and Multi-Domains. ECOC Nicola Sambo, Pietro G. Giardina, Ippokratis Sartzetakis, Andrea Sgambelluri, Francesco Fresi, Matteo Dallaglio, Gianluca Meloni, Giacomo Bernini, Konstantinos Christodoulopoulos, Piero Castoldi, Emmanouel A. Varvarigos
2017	—	`conf`	Improving QoT estimation accuracy through active monitoring. ICTON Ippokratis Sartzetakis, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2017	—	`conf`	Incremental planning of multi-layer elastic optical networks. ONDM P. Papanikolaou, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2017	—	`conf`	Inter-datacenter virtual capacity services: Reality and mechanisms. CloudNet Panagiotis C. Kokkinos, Ilias Gravalos, Aristotelis Kretsis, Emmanouel A. Varvarigos
2017	J	`jnl`	Joint Multi-layer Survivability Techniques for IP-Over-Elastic-Optical-Networks. JOCN P. Papanikolaou, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2017	—	`conf`	Optimally-driven Online Reservations in Elastic Optical Networks. ECOC Polyzois Soumplis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2017	—	`conf`	QoT aware adaptive elastic optical networks. OFC Ippokratis Sartzetakis, Kostas Christodoulopoulos, Emmanouel A. Varvarigos
2017	—	`conf`	Resource partitioning in the NEPHELE datacentre interconnect. ICTON Konstantinos Yiannopoulos, Konstantinos Kontodimas, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2017	C	`conf`	Routing algorithm with smart energy management on VCSEL interconnected networks. ISCC Ilias Gravalos, Apostolos Siokis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2017	—	`conf`	SDN control framework with dynamic resource assignment for slotted optical datacenter networks. OFC Giada Landi, Ioannis Patronas, Kostas Kontodimas, Muzzamil Aziz, Kostas Christodoulopoulos, Angelos Kyriakos, Marco Capitani, Amirreza Fazely Hamedani, Dionysios I. Reisis, Emmanouel A. Varvarigos, Paraskevas Bakopoulos, Hercules Avramopoulos
2017	J	`jnl`	Towards power consumption in optical networks: a cognitive prediction-based technique. Int. J. Commun. Syst. Panagiotis G. Sarigiannidis, Georgios I. Papadimitriou, Petros Nicopolitidis, Emmanouel A. Varvarigos
2016	—	`conf`	An emulation environment for SDN enabled flexible IP/optical networks. ICTON Aristotelis Kretsis, Loris Corazza, Kostas Christodoulopoulos, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2016	—	`conf`	Bandwidth allocation in the NEPHELE hybrid optical interconnect. ICTON Kostas Christodoulopoulos, Kostas Kontodimas, Kostas Yiannopoulos, Emmanouel A. Varvarigos
2016	J	`jnl`	Burst-by-burst dynamic bandwidth allocation for XG-PONs. IET Networks Ilias Gravalos, Kostas Yiannopoulos, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2016	—	`conf`	Collisions free scheduling in the NEPHELE hybrid electrical/optical datacenter interconnect. ICECS Kostas Christodoulopoulos, Kostas Kontodimas, Apostolos Siokis, Kostas Yiannopoulos, Emmanouel A. Varvarigos
2016	—	`conf`	Design of a Secure BYOD Policy for the Greek School Network: A Case Study. CSE/EUC/DCABES Vasileios Gkamas, Michael Paraskevas, Emmanouel A. Varvarigos
2016	B	`conf`	Efficient Gateways Placement for Internet of Things with QoS Constraints. GLOBECOM Ilias Gravalos, Prodromos Makris, Kostas Christodoulopoulos, Emmanouel A. Varvarigos
2016	—	`conf`	Estimating QoT of unestablished lightpaths. OFC Ippokratis Sartzetakis, Kostas Christodoulopoulos, Christos P. Tsekrekos, Dimitris Syvridis, Emmanouel A. Varvarigos
2016	—	`conf`	Evaluating Traffic Redirection Mechanisms for High Availability Servers. GLOBECOM Workshops Elias Konidis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2016	—	`conf`	Exploiting network kriging for fault localization. OFC Kostas Christodoulopoulos, Nicola Sambo, Emmanouel A. Varvarigos
2016	J	`jnl`	Flexgrid Technologies Enabling BRAS Centralization in MANs. JOCN Michela Svaluto Moreolo, Josep M. Fabrega, Laura Martín Gonzalez, Kostas Christodoulopoulos, Emmanouel A. Varvarigos, Juan Pedro Fernández-Palacios
2016	—	`conf`	Joint multilayer planning of survivable elastic optical networks. OFC P. Papanikolaou, Kostas Christodoulopoulos, Emmanouel A. Varvarigos
2016	J	`jnl`	Quality of Transmission Estimation in WDM and Elastic Optical Networks Accounting for Space-Spectrum Dependencies. JOCN Ippokratis Sartzetakis, Konstantinos Christodoulopoulos, Christos P. Tsekrekos, Dimitris Syvridis, Emmanouel A. Varvarigos
2016	—	`conf`	Supervised energy disaggregation using dictionary - based modelling of appliance states. ISGT Europe Christos Mavrokefalidis, Dimitris Ampeliotis, Evangelos Vlachos, Kostas Berberidis, Emmanouel A. Varvarigos
2016	J	`jnl`	Survey: Live Migration and Disaster Recovery over Long-Distance Networks. ACM Comput. Surv. Panagiotis C. Kokkinos, Dimitrios Kalogeras, Anna Levin, Emmanouel A. Varvarigos
2015	—	`conf`	A comparison study of joint and sequential multi-layer planning for IP over flexible optical networks. OFC Vasileios Gkamas, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2015	—	`conf`	A virtual microgrid platform for the efficient orchestration of multiple energy prosumers. Panhellenic Conference on Informatics Ioannis Mamounakis, Dimitrios J. Vergados, Prodromos Makris, Emmanouel A. Varvarigos, Tasos Mavridis
2015	Misc	`conf`	Analysis and Evaluation of I/O Hypervisor Scheduling. UCC Konstantinos Kontodimas, Panagiotis C. Kokkinos, Yossi Kuperman, Emmanouel A. Varvarigos
2015	—	`conf`	Cross-layer optimization: Network cost vs. physical layer margins. ICTON Polyzois Soumplis, P. Pananikolaou, Konstantinos Christodoulopoulos, Nikos Argyris, Christos Spatharakis, Stefanos Dris, Hercules Avramopoulos, Emmanouel A. Varvarigos
2015	C	`conf`	Demand allocation in local RES electricity market among multiple microgrids and multiple utilities through aggregators. ISCC Vasileios Botsis, Nikolaos D. Doulamis, Anastasios D. Doulamis, Emmanouel A. Varvarigos
2015	J	`jnl`	Dynamic connection establishment and network re-optimization in flexible optical networks. Photonic Netw. Commun. Polyzois Soumplis, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2015	C	`conf`	Efficient Clustering of DERs in a Virtual Association for Profit Optimization. DSD Vasileios Botsis, Nikolaos D. Doulamis, Anastasios D. Doulamis, Prodromos Makris, Emmanouel A. Varvarigos
2015	Misc	`conf`	Energy-aware multi-layer flexible optical network operation. SoftCOM Vasileios Gkamas, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2015	—	`conf`	Evaluating flexibility degrees in optical networks. OFC Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2015	—	`conf`	Experimental validation of MTU-BRAS connectivity with DMT transmission and coherent detection in flexgrid metro networks using sliceable transceivers. OFC Josep M. Fàbrega, Michela Svaluto Moreolo, Francisco Javier Vilchez, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos, Juan P. Fernández Palacios
2015	C	`conf`	Fair pricing mechanism for coalitions in rural areas. ISCC Vasileios Botsis, Nikolaos D. Doulamis, Emmanouel A. Varvarigos
2015	J	`jnl`	Green optical backbone networks: virtual topology adaptation using a page rank-based rating system. Int. J. Commun. Syst. Panagiotis Melidis, Petros Nicopolitidis, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2015	C	`conf`	High performance fault-tolerance for clouds. ISCC Dimosthenis Kyriazis, Vasileios I. Anagnostopoulos, Andrea Arcangeli, David Gilbert, Dimitrios Kalogeras, Ronen I. Kat, Cristian Klein, Panagiotis C. Kokkinos, Yossi Kuperman, Joel Nider, Petter Svärd, Luis Tomás, Emmanouel A. Varvarigos, Theodora A. Varvarigou
2015	J	`jnl`	Mantis: Cloud-based optical network planning and operation tool. Comput. Networks Aristotelis Kretsis, Panagiotis C. Kokkinos, Konstantinos Christodoulopoulos, Theodora A. Varvarigou, Emmanouel A. Varvarigos
2015	J	`jnl`	Minimizing Energy and Cost in Fixed-Grid and Flex-Grid Networks. JOCN P. Papanikolaou, Polyzois Soumplis, Konstantinos Manousakis, Georgios Papadimitriou, Georgios Ellinas, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2015	J	`jnl`	Minimizing Expected Transmissions Multicast in Wireless Multihop Networks. Int. J. Wirel. Inf. Networks Kostas Christodoulopoulos, Christos A. Papageorgiou, Emmanouel A. Varvarigos
2015	—	`conf`	Multilayer flex-grid network planning. ONDM P. Papanikolaou, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2015	—	`conf`	ORCHESTRA - Optical performance monitoring enabling flexible networking. ICTON Konstantinos Christodoulopoulos, Panagiotis C. Kokkinos, Andrea Di Giglio, Annachiara Pagano, Nikos Argyris, Christos Spatharakis, Stefanos Dris, Hercules Avramopoulos, Jean-Christophe Antona, Camille Delezoide, Philippe Jennevé, Jelena Pesic, Yvan Pointurier, Nicola Sambo, Filippo Cugini, Piero Castoldi, Giacomo Bernini, Gino Carrozzo, Emmanouel A. Varvarigos
2015	J	`jnl`	SuMo: Analysis and Optimization of Amazon EC2 Instances. J. Grid Comput. Panagiotis C. Kokkinos, Theodora A. Varvarigou, Aristotelis Kretsis, Polyzois Soumplis, Emmanouel A. Varvarigos
2015	J	`jnl`	The max-min fair approach on dynamic bandwidth allocation for XG-PONs. Trans. Emerg. Telecommun. Technol. Ilias Gravalos, Konstantinos Yiannopoulos, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2015	—	`conf`	Time Synchronization in XG-PON Systems: An Error Analysis. OPTICS Panagiotis G. Sarigiannidis, Georgios I. Papadimitriou, Petros Nicopolitidis, Emmanouel A. Varvarigos, Malamati D. Louta
2015	—	`conf`	VIMSEN: A Distributed Architecture for future Energy Market Frameworks. EANN Workshops George L. Lyberopoulos, Eleni Theodoropoulou, Ioanna Mesogiti, Konstantinos Filis, Ioannis Mamounakis, Prodromos Makris, Emmanouel A. Varvarigos
2014	—	`conf`	A highly-dynamic and distributed operational framework for smart energy networks. CAMAD George L. Lyberopoulos, Eleni Theodoropoulou, Ioanna Mesogiti, Prodromos Makris, Emmanouel A. Varvarigos
2014	—	`conf`	ARES: An Adaptive, Resilient, Estimation Scheme for Enforcing Bandwidth Allocation in XG-PON Systems. ICETE (Selected Papers) Panagiotis G. Sarigiannidis, Georgios I. Papadimitriou, Petros Nicopolitidis, Vasiliki L. Kakali, Emmanouel A. Varvarigos, Konstantinos Yiannopoulos
2014	Misc	`conf`	Algorithmic challenges in flexible optical networks. ICNC Emmanouel A. Varvarigos, Konstantinos Christodoulopoulos
2014	—	`conf`	Assessment of flexgrid technologies in the MAN for centralized BRAS architecture using S-BVT. ECOC Michela Svaluto Moreolo, Josep M. Fabrega, Francisco Javier Vilchez, Kostas Christodoulopoulos, Emmanouel A. Varvarigos, Víctor López, Juan Pedro Fernández-Palacios
2014	—	`conf`	Combined Polynomial Prediction and Max-Min Fair Bandwidth Redistribution in Ethernet Passive Optical Networks. ICETE (Selected Papers) Ioannis Mamounakis, Konstantinos Yiannopoulos, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2014	—	`conf`	Coverage capabilities of a multi-wavelength passive optical network architecture. CAMAD Konstantinos Yiannopoulos, Emmanouel A. Varvarigos, Vasilis Katopodis, Kostas Christodoulopoulos, Ioannis Lazarou, Paraskevas Bakopoulos, Hercules Avramopoulos, Dimitrios Klonidis, Ioannis Tomkos, L.-P. Dimos, George Heliotis
2014	—	`conf`	Dynamic connection establishment and network re-optimization in flexible optical networks. ONDM Polyzois Soumplis, Kostas Christodoulopoulos, Emmanouel A. Varvarigos
2014	—	`conf`	Energy efficient optical backbone networks: A dynamic threshold approach. SCVT Panagiotis Melidis, Petros Nicopolitidis, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2014	—	`conf`	Energy minimization design of fixed- and flex-grid optical networks. CAMAD Polyzois Soumplis, P. Papanikolaou, Konstantinos Christodoulopoulos, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2014	—	`conf`	GEN6 EU-project: Greek Pilot: "IPv6 upgrade of Energy Efficiency in School Networks". Panhellenic Conference on Informatics Aristotelis Kretsis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos, V. Nikolopoulos, E. Gkioxi, I. Hatzakis
2014	—	`conf`	Green networks: An energy-oriented model for IP over WDM optical networks. ICUMT Georgia A. Beletsioti, Constantine A. Kyriakopoulos, Georgios I. Papadimitriou, Petros Nicopolitidis, Emmanouel A. Varvarigos
2014	—	`conf`	HYRA: An Efficient Hybrid Reporting Method for XG-PON Upstream Resource Allocation. OPTICS Panagiotis G. Sarigiannidis, Georgios I. Papadimitriou, Petros Nicopolitidis, Emmanouel A. Varvarigos, Konstantinos Yiannopoulos
2014	—	`conf`	IFAISTOS: A fair and flexible resource allocation policy for next-generation passive optical networks. ICUMT Panagiotis G. Sarigiannidis, Georgios I. Papadimitriou, Petros Nicopolitidis, Emmanouel A. Varvarigos, Malamati D. Louta, Vasiliki L. Kakali
2014	—	`conf`	Laying out interconnects on optical printed circuit boards. ANCS Apostolos Siokis, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2014	—	`conf`	Minimizing power consumption in Mixed Line-Rate translucent optical networks. ONDM Konstantinos Manousakis, Emmanouel A. Varvarigos, Georgios Ellinas
2014	B	`conf`	Multi-criteria Virtual Machines Migration Considering the Reconfiguration of Their Logical Topology. MASCOTS Panagiotis C. Kokkinos, Theodora A. Varvarigou, Aristotelis Kretsis, Emmanouel A. Varvarigos
2014	Misc	`conf`	On Least Expected Transmissions multicasting in wireless networks. ICNC Christos A. Papageorgiou, Kostas Christodoulopoulos, Nikos Doulamis, Emmanouel A. Varvarigos
2014	—	`conf`	On the Prediction of EPON Traffic Using Polynomial Fitting in Optical Network Units. OPTICS Ioannis Mamounakis, Konstantinos Yiannopoulos, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2014	—	`conf`	On-OPCB interconnection networks. ICTON Apostolos Siokis, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2014	J	`jnl`	Optical network unit-based traffic prediction for Ethernet passive optical networks. IET Circuits Devices Syst. Ioannis Mamounakis, Konstantinos Yiannopoulos, Georgios I. Papadimitriou, Emmanouel A. Varvarigos
2014	J	`jnl`	Planning and operating flexible optical networks: Algorithmic issues and tools. IEEE Commun. Mag. Aristotelis Kretsis, Konstantinos Christodoulopoulos, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2014	J	`jnl`	Resource Selection for Tasks with Time Requirements Using Spectral Clustering. IEEE Trans. Computers Nikolaos D. Doulamis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2013	—	`conf`	An introduction to routing and wavelength assignment algorithms for fixed and flexgrid. OFC/NFOEC Emmanouel A. Varvarigos
2013	—	`conf`	Cost and Utilization Optimization of Amazon EC2 Instances. IEEE CLOUD Panagiotis C. Kokkinos, Theodora A. Varvarigou, Aristotelis Kretsis, Polyzois Soumplis, Emmanouel A. Varvarigos
2013	—	`conf`	Dynamic cooperative spectrum sharing in elastic networks. OFC/NFOEC Eleni Palkopoulou, Ioannis Stiakogiannakis, Dimitrios Klonidis, Kostas Christodoulopoulos, Emmanouel A. Varvarigos, Ori Gerstel, Ioannis Tomkos
2013	—	`conf`	Ensuring fair downlink allocation in modern access networks: The XG-PON framework. SCVT Panagiotis G. Sarigiannidis, Georgios I. Papadimitriou, Petros Nicopolitidis, Emmanouel A. Varvarigos
2013	J	`jnl`	Implementing and evaluating scheduling policies in gLite middleware. Concurr. Comput. Pract. Exp. Aristotelis Kretsis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2013	B	`conf`	Multi-criteria cooperative energy-aware routing in wireless ad-hoc networks. IWCMC Ilias Gravalos, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2013	J	`jnl`	New assembly techniques and fast reservation protocols for optical burst switched networks based on traffic prediction. Opt. Switch. Netw. Kyriaki Seklou, Angeliki Sideri, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2013	—	`conf`	PANDA: asymmetric passive optical network for xDSL and FTTH access. Panhellenic Conference on Informatics Konstantinos Yiannopoulos, Emmanouel A. Varvarigos, Dimitrios Klonidis, Ioannis Tomkos, Maria Spyropoulou, Ioannis Lazarou, Paraskevas Bakopoulos, Hercules Avramopoulos, George Heliotis, L.-P. Dimos, George Agapiou, Georgios Papastergiou, Ilias Koukouvinos, A. Orfanoudakis, Thanasis Oikonomou, Dimitrios Kritharidis, Spyridon Spyridakis, M. Dalakidis, G. Synnefakis, Dionysios I. Reisis, Georgios I. Papadimitriou, Panagiotis G. Sarigiannidis, Christos Liaskos
2013	—	`conf`	PERIKLIS - Electronic Democracy in the 21st Century Using Mobile and Social Network Technologies. EGOV/ePart Ongoing Research Panagiotis C. Kokkinos, Kostas Koumoutsos, Nikolaos D. Doulamis, Emmanouel A. Varvarigos, Dimitris Petrantonakis, Mania Kardara, Emmanuel Sardis, Antonis Vekris, Stelios Gerontidis
2013	J	`jnl`	Planning Flexible Optical Networks Under Physical Layer Constraints. JOCN Konstantinos Christodoulopoulos, Polyzois Soumplis, Emmanouel A. Varvarigos
2013	J	`jnl`	Time-Varying Spectrum Allocation Policies and Blocking Analysis in Flexible Optical Networks. IEEE J. Sel. Areas Commun. Konstantinos Christodoulopoulos, Ioannis Tomkos, Emmanouel A. Varvarigos
2013	—	`conf`	Trading off transponders for spectrum in flexgrid networks. OFC/NFOEC Kostas Christodoulopoulos, Polyzois Soumplis, Emmanouel A. Varvarigos
2012	J	`jnl`	Benefits of implementing a dynamic impairment-aware optical network: results of EU Project DICONET. IEEE Commun. Mag. Marianna Angelou, Siamak Azodolmolky, Ioannis Tomkos, Jordi Perelló, Salvatore Spadaro, Davide Careglio, Konstantinos Manousakis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos, Dimitri Staessens, Didier Colle, Chava Vijaya Saradhi, Maurice Gagnaire, Yabin Ye
2012	J	`jnl`	DICONET NPOT: An Impairments Aware Tool for Planning and Managing Dynamic Optical Networks. J. Netw. Syst. Manag. Siamak Azodolmolky, Panagiotis C. Kokkinos, Marianna Angelou, Emmanouel A. Varvarigos, Ioannis Tomkos
2012	J	`jnl`	Deploying LiveWN Grids in the Greek School Network. J. Grid Comput. Michael N. Kalochristianakis, Fotis Georgatos, Vasileios Gkamas, Giannis Kouretis, Emmanouel A. Varvarigos
2012	—	`conf`	Eco-labeling Greek Schools for Energy Efficiency over IPv6. Panhellenic Conference on Informatics Kostas Koumoutsos, Emmanouel A. Varvarigos, V. Nikolopoulos, A. Liakopoulos
2012	J	`jnl`	Quantifying Spectrum, Cost, and Energy Efficiency in Fixed-Grid and Flex-Grid Networks [Invited]. JOCN Eleni Palkopoulou, Marianna Angelou, Dimitrios Klonidis, Konstantinos Christodoulopoulos, Axel Klekamp, Fred Buchali, Emmanouel A. Varvarigos, Ioannis Tomkos
2012	—	`conf`	Routing and Spectrum Allocation policies for time-varying traffic in flexible optical networks. ONDM Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos
2012	J	`jnl`	Scheduling efficiency of resource information aggregation in grid networks. Future Gener. Comput. Syst. Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2012	—	`conf`	Social-like analysis on Virtual Machine communication traces. CloudNet Panagiotis C. Kokkinos, Theodora A. Varvarigou, Aristotelis Kretsis, Emmanouel A. Varvarigos
2012	—	`conf`	Topic 13: High Performance Network and Communication. Euro-Par Chris Develder, Emmanouel A. Varvarigos, Admela Jukan, Dimitra Simeonidou
2011	J	`jnl`	Efficient data consolidation in grid networks and performance analysis. Future Gener. Comput. Syst. Panagiotis C. Kokkinos, Kostas Christodoulopoulos, Emmanouel A. Varvarigos
2011	—	`conf`	Experimental comparison of impairment-aware RWA algorithms in a GMPLS-controlled dynamic optical network. Future Network & Mobile Summit Marianna Angelou, Fernando Agraz, Panagiotis C. Kokkinos, Jordi Perelló, Siamak Azodolmolky, Emmanouel A. Varvarigos, Salvatore Spadaro, Ioannis Tomkos
2011	—	`conf`	Using a nature inspired technique to train a dynamic IA-RWA algorithm. ICT Konstantinos Manousakis, Emmanouel A. Varvarigos
2010	J	`jnl`	A Grid-enabled CPU Scavenging Architecture and a Case Study of its Use in the Greek School Network. J. Grid Comput. Fotis Georgatos, Vasileios Gkamas, Aristeidis Ilias, Giannis Kouretis, Emmanouel A. Varvarigos
2010	J	`jnl`	A survey of quality of service differentiation mechanisms for optical burst switching networks. Opt. Switch. Netw. Nail Akar, Ezhan Karasan, Kyriakos Vlachos, Emmanouel A. Varvarigos, Davide Careglio, Miroslaw Klinkowski, Josep Solé-Pareta
2010	—	`conf`	Cost comparison of different translucent optical network architectures. CTTE Maarten De Groote, Konstantinos Manousakis, Panagiotis C. Kokkinos, Didier Colle, Mario Pickavet, Konstantinos Christodoulopoulos, Emmanouel A. Varvarigos, Piet Demeester
2010	—	`conf`	Failure localization in Transparent Optical Networks. ICUMT Dimitri Staessens, Konstantinos Manousakis, Didier Colle, Uri Mahlab, Mario Pickavet, Emmanouel A. Varvarigos, Piet Demeester
2010	J	`jnl`	Impairment Aware RWA in Optical Networks: Over-provisioning or Cross Optimization? J. Networks Konstantinos Christodoulopoulos, Panagiotis C. Kokkinos, Konstantinos Manousakis, Emmanouel A. Varvarigos
2010	J	`jnl`	Joint multi-cost routing and power control in wireless ad hoc networks. Wirel. Networks Nikolaos Karagiorgas, Panagiotis C. Kokkinos, Christos A. Papageorgiou, Emmanouel A. Varvarigos
2010	J	`jnl`	Offline Routing and Wavelength Assignment in Transparent WDM Networks. IEEE/ACM Trans. Netw. Konstantinos Christodoulopoulos, Konstantinos Manousakis, Emmanouel A. Varvarigos
2010	—	`conf`	Path Protection in WDM Networks with Quality of Transmission Limitations. ICC Panagiotis C. Kokkinos, Konstantinos Manousakis, Emmanouel A. Varvarigos
2010	B	`conf`	Performance Evaluation of Node Architectures with Color and Direction Constraints in WDM Networks. GLOBECOM Konstantinos Manousakis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2010	B	`conf`	Routing and Spectrum Allocation in OFDM-Based Optical Networks with Elastic Bandwidth Allocation. GLOBECOM Kostas Christodoulopoulos, Ioannis Tomkos, Emmanouel A. Varvarigos
2009	—	`conf`	A Multicost Approach to Online Impairment-Aware RWA. ICC Kostas Christodoulopoulos, Konstantinos Manousakis, Emmanouel A. Varvarigos, Marianna Angelou, Ioannis Tomkos
2009	J	`jnl`	A comparison of centralized and distributed meta-scheduling architectures for computation and communication tasks in Grid networks. Comput. Commun. Kostas Christodoulopoulos, Vasileios Sourlas, I. Mpakolas, Emmanouel A. Varvarigos
2009	J	`jnl`	A framework for providing hard delay guarantees and user fairness in Grid computing. Future Gener. Comput. Syst. Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2009	C	`conf`	An open and integrated management platform for wireless sensor networks. ISADS Michael N. Kalochristianakis, Vasileios Gkamas, Georgios Mylonas, Sotiris E. Nikoletseas, Emmanouel A. Varvarigos, José D. P. Rolim
2009	J	`jnl`	Considering physical layer impairments in offline RWA. IEEE Netw. Kostas Christodoulopoulos, Konstantinos Manousakis, Emmanouel A. Varvarigos, Marianna Angelou
2009	B	`conf`	Cross layer optimization of static lightpath demands in transparent WDM optical networks. ITW Kostas Christodoulopoulos, Konstantinos Manousakis, Emmanouel A. Varvarigos
2009	—	`conf`	DICONET: future generation transparent networking with dynamic impairment awareness. Future Internet Assembly Ioannis Tomkos, Yvan Pointurier, Siamak Azodolmolky, Michael Eiselt, Thierry Zami, Radoslaw Piesiewicz, Chava Vijaya Saradhi, Matthias Gunkel, Uri Mahlab, Ming Chen, Yabin Ye, Mario Pickavet, Maurice Gagnaire, Emmanouel A. Varvarigos, Josep Solé-Pareta, Reza Nejabati, Yixuan Qin, Dimitra Simeonidou
2009	B	`conf`	Developing Scheduling Policies in gLite Middleware. CCGRID Aristotelis Kretsis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2009	B	`conf`	Energy-efficient multicasting in wireless networks with fixed node transmission power. IWCMC Christos A. Papageorgiou, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2009	A*	`conf`	Impairment-Aware Offline RWA for Transparent Optical Networks. INFOCOM Konstantinos Manousakis, Kostas Christodoulopoulos, Emmanouel A. Varvarigos
2009	B	`conf`	Multi-Parametric Online RWA Based on Impairment Generating Sources. GLOBECOM Panagiotis C. Kokkinos, Kostas Christodoulopoulos, Konstantinos Manousakis, Emmanouel A. Varvarigos
2009	J	`jnl`	Multi-cost job routing and scheduling in Grid networks. Future Gener. Comput. Syst. Tim Stevens, Marc De Leenheer, Chris Develder, Bart Dhoedt, Kostas Christodoulopoulos, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2009	—	`conf`	Multicost Energy-Aware Broadcasting in Wireless Networks with Distributed Considerations. MOBILIGHT Christos A. Papageorgiou, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2009	—	`ch.`	Novel Switch Architectures. COST Action 291 Final Report Wojciech Kabacinski, Jiajia Chen, Grzegorz Danilewicz, Janusz Kleban, Maria Spyropoulou, Ioannis Tomkos, Emmanouel A. Varvarigos, Kyriakos Vlachos, Slawomir Wêclewski, Lena Wosinska, Konstantinos Yiannopoulos
2009	J	`jnl`	OpenRSM: a lightweight integrated open source remote management solution. Int. J. Netw. Manag. Y. Karalis, Michael N. Kalochristianakis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2009	—	`conf`	Optimal and Near-Optimal Energy-Efficient Broadcasting in Wireless Networks. Euro-Par Christos A. Papageorgiou, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2009	B	`conf`	Resource Information Aggregation in Hierarchical Grid Networks. CCGRID Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2009	J	`jnl`	The slow start power controlled MAC protocol for mobile ad hoc networks and its performance analysis. Ad Hoc Networks Emmanouel A. Varvarigos, Vasileios Gkamas, Nikolaos Karagiorgas
2008	—	`conf`	Asynchronous Tele-education and Computer-Enhanced Learning Services in the Greek School Network. WSKS (1) Michael N. Kalochristianakis, Michael Paraskevas, Emmanouel A. Varvarigos
2008	B	`conf`	Comparison of Routing and Wavelength Assignment Algorithms in WDM Networks. GLOBECOM Kostas Christodoulopoulos, Konstantinos Manousakis, Emmanouel A. Varvarigos
2008	B	`conf`	Data Consolidation: A Task Scheduling and Data Migration Technique for Grid Networks. CCGRID Panagiotis C. Kokkinos, Kostas Christodoulopoulos, Aristotelis Kretsis, Emmanouel A. Varvarigos
2008	—	`conf`	Fast Reservation Protocols for Latency Reduction in Optical Burst-Switched Networks Based on Predictions. ICN Kyriaki Seklou, Emmanouel A. Varvarigos
2008	—	`conf`	Implementing distributed multicost routing in mobile ad hoc networks using dsr. MOBIWAC Christos A. Papageorgiou, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2008	B	`conf`	Joint Communication and Computation Task Scheduling in Grids. CCGRID Kostas Christodoulopoulos, Nikolaos D. Doulamis, Emmanouel A. Varvarigos
2008	C	`conf`	Routing and scheduling connections in networks that support advance reservations. BROADNETS Emmanouel A. Varvarigos, Vasileios Sourlas, Konstantinos Christodoulopoulos
2008	J	`jnl`	Routing and scheduling connections in networks that support advance reservations. Comput. Networks Emmanouel A. Varvarigos, Vasileios Sourlas, Kostas Christodoulopoulos
2008	—	`conf`	Spectral Clustering Scheduling Techniques for Tasks with Strict QoS Requirements. Euro-Par Nikolaos D. Doulamis, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2008	J	`jnl`	Statistical Analysis and Modeling of Jobs in a Grid Environment. J. Grid Comput. Kostas Christodoulopoulos, Vasileios Gkamas, Emmanouel A. Varvarigos
2008	C	`conf`	The Design of an Open and Integrated Sensor Network Management Platform. APNOMS Michael N. Kalochristianakis, Vasileios Gkamas, Georgios Mylonas, Sotiris E. Nikoletseas, José D. P. Rolim, Emmanouel A. Varvarigos
2007	—	`conf`	A Framework for Providing Hard Delay Guarantees in Grid Computing. eScience Panagiotis C. Kokkinos, Emmanouel A. Varvarigos, Nikolaos D. Doulamis
2007	J	`jnl`	A new burst assembly scheme based on the average packet delay and its performance for TCP traffic. Opt. Switch. Netw. Kostas Christodoulopoulos, Emmanouel A. Varvarigos, Kyriakos Vlachos
2007	J	`jnl`	Adjusted fair scheduling and non-linear workload prediction for QoS guarantees in grid computing. Comput. Commun. Nikolaos D. Doulamis, Anastasios D. Doulamis, Antonios Litke, Athanasios Panagakis, Theodora A. Varvarigou, Emmanouel A. Varvarigos
2007	—	`conf`	Delay Components of Job Processing in a Grid: Statistical Analysis and Modeling. ICNS Kostas Christodoulopoulos, Vasileios Gkamas, Emmanouel A. Varvarigos
2007	J	`jnl`	Fair Scheduling Algorithms in Grids. IEEE Trans. Parallel Distributed Syst. Nikolaos D. Doulamis, Emmanouel A. Varvarigos, Theodora A. Varvarigou
2007	—	`conf`	Job Demand Models for Optical Grid Research. ONDM Kostas Christodoulopoulos, Emmanouel A. Varvarigos, Chris Develder, Marc De Leenheer, Bart Dhoedt
2007	B	`conf`	Multicost Routing in Wireless AD-HOC Networks with Variable Transmission Power. PIMRC Nikolaos Karagiorgas, Panagiotis C. Kokkinos, Christos A. Papageorgiou, Emmanouel A. Varvarigos
2007	—	`conf`	Multiple-Input and Shared Buffer Architectures for Asynchronous Optical Burst Switching Networks. ICC Konstantinos Yiannopoulos, Emmanouel A. Varvarigos, Kyriakos Vlachos
2007	—	`conf`	New Assembly Techniques for Optical Burst Switched Networks Based on Traffic Prediction. ONDM Angeliki Sideri, Emmanouel A. Varvarigos
2007	B	`conf`	Profiling Computation Jobs in Grid Systems. CCGRID Michael Oikonomakos, Kostas Christodoulopoulos, Emmanouel A. Varvarigos
2007	J	`jnl`	The Design of an Allo-Optical Packet Switching Network. IEEE Commun. Mag. Ruth van Caenegem, Didier Colle, Mario Pickavet, Piet Demeester, Konstantinos Christodoulopoulos, Kyriakos Vlachos, Emmanouel A. Varvarigos, Leontios Stampoulidis, Diego Roccato, Ruth Vilar
2007	J	`jnl`	The Greek School Network: A Paradigm of Successful Educational Services Based on the Dynamics of Open-Source Technology. IEEE Trans. Educ. Michael N. Kalochristianakis, Michael Paraskevas, Emmanouel A. Varvarigos, Nikolaos Xypolitos
2006	J	`jnl`	A Bandwidth Monitoring Mechanism Enhancing SNMP to Record Timed Resource Reservations. J. Netw. Syst. Manag. Konstantinos Manousakis, Vasileios Sourlas, Kostas Christodoulopoulos, Emmanouel A. Varvarigos, Kyriakos Vlachos
2006	B	`conf`	A Slow Start Power Control MAC Protocol for Mobile Ad HOC Networks. PIMRC Vasileios Gkamas, Emmanouel A. Varvarigos
2006	C	`conf`	Jitter-based analysis and discussion of burst assembly algorithms. BROADNETS Javier Aracil, José Alberto Hernández, Kyriakos Vlachos, Emmanouel A. Varvarigos
2006	—	`conf`	Multicost Routing over an Infinite Time Horizon in Energy and Capacity Constrained Wireless Ad-Hoc Networks. Euro-Par Christos A. Papageorgiou, Panagiotis C. Kokkinos, Emmanouel A. Varvarigos
2006	C	`conf`	Relaxing Delayed Reservations: An approach for Quality of Service differentiation in Optical Burst Switching networks. BROADNETS Kostas Christodoulopoulos, Kyriakos Vlachos, Kostas Yiannopoulos, Emmanouel A. Varvarigos
2006	—	`conf`	The Greek School Network - Structure, Design Principles, and Services Offered. ICE-B Nikolaos Xypolitos, Michael Paraskevas, Emmanouel A. Varvarigos
2005	B	`conf`	ARTEMIS: a 40 Gb/s all-optical self-router using asynchronous bit and packet-level optical signal processing. GLOBECOM Leontios Stampoulidis, Efstratios Kehayas, K. Vyrsokinos, Kostas Christodoulopoulos, Dimitris Tsiokos, Paraskevas Bakopoulos, George T. Kanellos, Kyriakos Vlachos, Emmanouel A. Varvarigos, Hercules Avramopoulos
2005	C	`conf`	Analyzing traffic across the Greek School Network. LANMAN Costas Kattirtzis, Emmanouel A. Varvarigos, Kyriakos Vlachos, George Stathakopoulos, Michael Paraskevas
2005	C	`conf`	Energy-Aware Routing in Wireless Ad-Hoc Networks. WOWMOM Panagiotis C. Kokkinos, Christos A. Papageorgiou, Emmanouel A. Varvarigos
2004	J	`jnl`	A combined fuzzy-neural network model for non-linear prediction of 3-D rendering workload in Grid computing. IEEE Trans. Syst. Man Cybern. Part B Nikolaos D. Doulamis, Anastasios D. Doulamis, Athanasios Panagakis, Konstantinos Dolkas, Theodora A. Varvarigou, Emmanouel A. Varvarigos
2004	—	`conf`	An Advanced Architecture for a Commercial Grid Infrastructure. European Across Grids Conference Antonios Litke, Athanasios Panagakis, Anastasios D. Doulamis, Nikolaos D. Doulamis, Theodora A. Varvarigou, Emmanouel A. Varvarigos
2004	J	`jnl`	Performance engineering of metropolitan area optical networks through impairment constraint routing. IEEE Commun. Mag. Ioannis Tomkos, Dimitrios Vogiatzis, Carmen Mas, Ioannis Zacharopoulos, Anna Tzanakaki, Emmanouel A. Varvarigos
2004	B	`conf`	Performance evaluation of an optical packet "scheduling" switch. GLOBECOM Kyriakos Vlachos, Kyriaki Seklou, Emmanouel A. Varvarigos
2003	B	`conf`	A Priority-based Balanced Routing Scheme for Random Broadcasting and Routing in Tori. ICPP Chi-Hsiang Yeh, Emmanouel A. Varvarigos, Abdelhamid Eshoul
2001	B	`conf`	A Mathematical Game and Its Applications to the Design of Interconnection Networks. ICPP Chi-Hsiang Yeh, Emmanouel A. Varvarigos
2001	J	`jnl`	An analysis of oblivious and adaptive routing in optical networks with wavelength translation. IEEE/ACM Trans. Netw. Jonathan P. Lang, Vishal Sharma, Emmanouel A. Varvarigos
2001	J	`jnl`	Performance evaluation for a quasi-synchronous packet radio network (QSPNET). IEEE/ACM Trans. Netw. Ayan Banerjee, Ronald A. Iltis, Emmanouel A. Varvarigos
2001	A	`conf`	RACE: A Software-Based Fault Tolerance Scheme for Systematically Transforming Ordinary Algorithms to Robust Algorithms. IPDPS Chi-Hsiang Yeh, Behrooz Parhami, Emmanouel A. Varvarigos, Theodora A. Varvarigou
2001	—	`conf`	Reservation-Based Session Routing for Broadband Communication Networks with Strict QoS Requirements. ICOIN Chi-Hsiang Yeh, Emmanouel A. Varvarigos, Dimitri P. Bertsekas, Hussein T. Mouftah
2000	J	`jnl`	A library of static and dynamic communication algorithms for parallel computation. Telecommun. Syst. Emmanouel A. Varvarigos
2000	B	`conf`	Multilayer VLSI Layout for Interconnection Networks. ICPP Chi-Hsiang Yeh, Emmanouel A. Varvarigos, Behrooz Parhami
2000	—	`conf`	The Scalable Networking Scheme for High-Speed Networks. ICC (3) Chi-Hsiang Yeh, Emmanouel A. Varvarigos
2000	B	`conf`	VLSI layout and packaging of butterfly networks. SPAA Chi-Hsiang Yeh, Behrooz Parhami, Emmanouel A. Varvarigos, Hua Lee
1999	—	`conf`	2.5n-Step Sorting on n*n Meshes in the Presence of o(sqrt(n)) Worst-Case Faults. IPPS/SPDP Chi-Hsiang Yeh, Behrooz Parhami, Hua Lee, Emmanouel A. Varvarigos
1999	J	`jnl`	A virtual circuit deflection protocol. IEEE/ACM Trans. Netw. Emmanouel A. Varvarigos, Jonathan P. Lang
1999	B	`conf`	Routing and Embeddings in Super Cayley Graphs. PaCT Chi-Hsiang Yeh, Emmanouel A. Varvarigos, Hua Lee
1999	—	`conf`	The Recursive Grid Layout Scheme for VLSI Layout of Hierarchical Networks. IPPS/SPDP Chi-Hsiang Yeh, Behrooz Parhami, Emmanouel A. Varvarigos
1998	J	`jnl`	A Dynamic Scheduling Communication Protocol and Its Analysis for Hypercube Networks. Int. J. Found. Comput. Sci. Ayan Banerjee, Emmanouel A. Varvarigos
1998	J	`jnl`	An Efficient Reservation Connection Control Protocol for Gigabit Networks. Comput. Networks Emmanouel A. Varvarigos, Vishal Sharma
1998	B	`conf`	An Optimal Routing Scheme for Multiple Broadcast. ICPADS Chi-Hsiang Yeh, Emmanouel A. Varvarigos, Hua Lee
1998	A*	`conf`	Limited Wavelength Translation in All-Optical WDM Mesh Networks. INFOCOM Vishal Sharma, Emmanouel A. Varvarigos
1998	J	`jnl`	Macro-Star Networks: Efficient Low-Degree Alternatives to Star Graphs. IEEE Trans. Parallel Distributed Syst. Chi-Hsiang Yeh, Emmanouel A. Varvarigos
1998	J	`jnl`	Optimal communication algorithms for Manhattan Street networks. Discret. Appl. Math. Emmanouel A. Varvarigos
1997	—	`conf`	An Analysis of Deflection-Based Wormhole Routing with Virtual Channels. Euro-Par Emmanouel A. Varvarigos, Jonathan P. Lang
1997	J	`jnl`	Circuit Switching with Input Queuing: An Analysis for the d-Dimensional Wraparound Mesh and the Hypercube. IEEE Trans. Parallel Distributed Syst. Vishal Sharma, Emmanouel A. Varvarigos
1997	J	`jnl`	The ready-to-go virtual circuit protocol: a loss-free protocol for multigigabit networks using FIFO buffers. IEEE/ACM Trans. Netw. Emmanouel A. Varvarigos, Vishal Sharma
1996	J	`jnl`	A Conflict Sense Routing Protocol and Its Performance for Hypercubes. IEEE Trans. Computers Emmanouel A. Varvarigos, Dimitri P. Bertsekas
1996	Misc	`conf`	Depth-Efficient Threshold Circuits for Multiplication and Symmetric Function Computation. COCOON Chi-Hsiang Yeh, Emmanouel A. Varvarigos
1996	J	`jnl`	Routing Schemes for Multiple Random Broadcasts in Arbitrary Network Topologies. IEEE Trans. Parallel Distributed Syst. Emmanouel A. Varvarigos, Ayan Banerjee
1996	—	`conf`	Some Closed Form Results for Circuit Switching in a Hypercube Network. Euro-Par, Vol. II Vishal Sharma, Emmanouel A. Varvarigos
1995	J	`jnl`	Dynamic Broadcasting in Parallel Computing. IEEE Trans. Parallel Distributed Syst. Emmanouel A. Varvarigos, Dimitri P. Bertsekas
1995	J	`jnl`	Transposition of Banded Matrices in Hypercubes: A Nearly Isotropic Task. Parallel Comput. Emmanouel A. Varvarigos, Dimitri P. Bertsekas
1994	J	`jnl`	Partial Multinode Broadcast and Partial Exchange Algorithms for d-Dimensional Meshes. J. Parallel Distributed Comput. Emmanouel A. Varvarigos, Dimitri P. Bertsekas
1994	J	`jnl`	Performance of hypercube routing schemes with or without buffering. IEEE/ACM Trans. Netw. Emmanouel A. Varvarigos, Dimitri P. Bertsekas
1993	J	`jnl`	Multinode Broadcast in Hypercubes and Rings with Randomly Distributed Length of Packets. IEEE Trans. Parallel Distributed Syst. Emmanouel A. Varvarigos, Dimitri P. Bertsekas
1992	J	`jnl`	Communication algorithms for isotropic tasks in hypercubes and wraparound meshes. Parallel Comput. Emmanouel A. Varvarigos, Dimitri P. Bertsekas
1992	—	`conf`	Partial Multinode Broadcast Algorithms for D-Dimensional Meshes. ICPP (3) Emmanouel A. Varvarigos, Dimitri P. Bertsekas
1992	—	`—`	Static and dynamic communication in parallel computing. Emmanouel A. Varvarigos