Implementing Replica Placements: Feasibility and Cost Minimization. - Thanasis Loukopoulos; Nikos Tziritas; Petros Lampsas; Spyros Lalis (IPDPS, 2007)

Formal Model and Scheduling Heuristics for the Replica Migration Problem. - Nikos Tziritas; Thanasis Loukopoulos; Petros Lampsas; Spyros Lalis (Euro-Par, 2008)

Using Multicast Transfers in the Replica Migration Problem: Formulation and Scheduling Heuristics. - Nikos Tziritas; Thanasis Loukopoulos; Petros Lampsas; Spyros Lalis (Euro-Par, 2009)

On Deploying Tree Structured Agent Applications in Networked Embedded Systems. - Nikos Tziritas; Thanasis Loukopoulos; Spyros Lalis; Petros Lampsas (Euro-Par (2), 2010)

Agent placement in wireless embedded systems: Memory space and energy optimizations. - Nikos Tziritas; Thanasis Loukopoulos; Spyros Lalis; Petros Lampsas (IPDPS Workshops, 2010)

GRAL: A Grouping Algorithm to Optimize Application Placement in Wireless Embedded Systems. - Nikos Tziritas; Thanasis Loukopoulos; Spyros Lalis; Petros Lampsas (IPDPS, 2011)

Algorithms for energy-driven agent placement in wireless embedded systems with memory constraints. - Nikos Tziritas; Thanasis Loukopoulos; Spyros Lalis; Petros Lampsas (Simul. Model. Pract. Theory, 2011)

On Reconfiguring Embedded Application Placement on Smart Sensing and Actuating Environments. - Nikos Tziritas; Samee Ullah Khan; Thanasis Loukopoulos (Intelligent Decision Systems in Large-Scale Distributed Environments, 2011)

An Optimal Fully Distributed Algorithm to Minimize the Resource Consumption of Cloud Applications. - Nikos Tziritas; Samee Ullah Khan; Cheng-Zhong Xu 001; Jue Hong (ICPADS, 2012)

Introducing Agent Evictions to Improve Application Placement in Wireless Distributed Systems. - Nikos Tziritas; Petros Lampsas; Spyros Lalis; Thanasis Loukopoulos; Samee Ullah Khan; Cheng-Zhong Xu 001 (ICPP, 2012)

Improving Application Availability in Wireless Sensor Networks with Energy-Harvesting Capability. - Ilias Rentifis; Nikos Tziritas; Petros Lampsas; Spyros Lalis; Thanasis Loukopoulos (PDCAT, 2012)

Middleware Mechanisms for Agent Mobility in Wireless Sensor and Actuator Networks. - Nikos Tziritas; Giorgis Georgakoudis; Spyros Lalis; Tomasz Paczesny; Jaroslaw Domaszewicz; Petros Lampsas; Thanasis Loukopoulos (S-CUBE, 2012)

Application-Aware Workload Consolidation to Minimize Both Energy Consumption and Network Load in Cloud Environments. - Nikos Tziritas; Cheng-Zhong Xu 001; Thanasis Loukopoulos; Samee Ullah Khan; Zhibin Yu 001 (ICPP, 2013)

A Comparative Study of Job Scheduling Strategies in Large-Scale Parallel Computational Systems. - Aftab Ahmed Chandio; Cheng-Zhong Xu 001; Nikos Tziritas; Kashif Bilal; Samee Ullah Khan (TrustCom/ISPA/IUCC, 2013)

On minimizing the resource consumption of cloud applications using process migrations. - Nikos Tziritas; Samee Ullah Khan; Cheng-Zhong Xu 001; Thanasis Loukopoulos; Spyros Lalis (J. Parallel Distributed Comput., 2013)

Distributed Online Algorithms for the Agent Migration Problem in WSNs. - Nikos Tziritas; Spyros Lalis; Samee Ullah Khan; Thanasis Loukopoulos; Cheng-Zhong Xu 001; Petros Lampsas (Mob. Networks Appl., 2013)

A comparative study on resource allocation and energy efficient job scheduling strategies in large-scale parallel computing systems. - Aftab Ahmed Chandio; Kashif Bilal; Nikos Tziritas; Zhibin Yu 001; Qingshan Jiang; Samee Ullah Khan; Cheng-Zhong Xu 001 (Clust. Comput., 2014)

Survey on Grid Resource Allocation Mechanisms. - Muhammad Bilal Qureshi; Maryam Mehri Dehnavi; Nasro Min-Allah; Muhammad Shuaib Qureshi; Hameed Hussain; Ilias Rentifis; Nikos Tziritas; Thanasis Loukopoulos; Samee Ullah Khan; Cheng-Zhong Xu 001; Albert Y. Zomaya (J. Grid Comput., 2014)

Single and Group Agent Migration: Algorithms, Bounds, and Optimality Issues. - Nikos Tziritas; Samee Ullah Khan; Thanasis Loukopoulos; Spyros Lalis; Cheng-Zhong Xu 001; Petros Lampsas (IEEE Trans. Computers, 2014)

Performance Evaluation of Energy-Aware Best Fit Decreasing Algorithms for Cloud Environments. - Saad Mustafa; Kashif Bilal; Sajjad Ahmad Madani; Nikos Tziritas; Samee Ullah Khan; Laurence T. Yang (DSDIS, 2015)

Coordination Strategies for Agent Migrations in Wireless Sensor Networks. - Nikos Tziritas; Thanasis Loukopoulos; Spyros Lalis; Samee Ullah Khan; Cheng-Zhong Xu 001 (ICPADS, 2015)

An Approach for Map-Matching Strategy of GPS-Trajectories Based on the Locality of Road Networks. - Aftab Ahmed Chandio; Nikos Tziritas; Fan Zhang 019; Cheng-Zhong Xu 001 (IOV, 2015)

RAC: a remote application calling framework for coordination of mobile apps. - Panos Papadopoulos; Thanasis Loukopoulos; Ioannis Anagnostopoulos; Nikolaos Tziritas; Michael Vassilakopoulos (Panhellenic Conference on Informatics, 2015)

A survey on text mining in social networks. - Rizwana Irfan; Christine K. King; Daniel Grages; Sam J. Ewen; Samee U. Khan; Sajjad Ahmad Madani; Joanna Kolodziej; Lizhe Wang 001; Dan Chen 001; Ammar Rayes; Nikos Tziritas; Cheng-Zhong Xu 001; et al. (Knowl. Eng. Rev., 2015)

Distributed Algorithms for the Operator Placement Problem. - Nikos Tziritas; Thanasis Loukopoulos; Samee U. Khan; Cheng-Zhong Xu 001 (IEEE Trans. Comput. Soc. Syst., 2015)

Energy-Aware Query Processing on a Parallel Database Cluster Node. - Amine Roukh; Ladjel Bellatreche; Nikos Tziritas; Carlos Ordonez 001 (ICA3PP, 2016)

Adaptive Tile Parallelization for Fast Video Encoding in HEVC. - Maria G. Koziri; Panos K. Papadopoulos; Nikos Tziritas; Antonios N. Dadaliaris; Thanasis Loukopoulos; Samee U. Khan; Cheng-Zhong Xu 001 (iThings/GreenCom/CPSCom/SmartData, 2016)

Slice-based parallelization in HEVC encoding: Realizing the potential through efficient load balancing. - Maria G. Koziri; Panos Papadopoulos; Nikos Tziritas; Antonios N. Dadaliaris; Thanasis Loukopoulos; Samee U. Khan (MMSP, 2016)

Performance Evaluation of Batch Encodings in HEVC Using Slice Level Parallelism. - Panos Papadopoulos; Maria G. Koziri; Nikolaos Tziritas; Thanasis Loukopoulos; Ioannis Anagnostopoulos; Georgios I. Stamoulis (PCI, 2016)

A framework for scheduling the encoding of multiple smart user videos. - Maria G. Koziri; Panos Papadopoulos; Nikos Tziritas; Antonios N. Dadaliaris; Thanasis Loukopoulos; Georgios I. Stamoulis (SMAP, 2016)

A survey and taxonomy on energy efficient resource allocation techniques for cloud computing systems. - Abdul Hameed; Alireza Khoshkbarforoushha; Rajiv Ranjan 001; Prem Prakash Jayaraman; Joanna Kolodziej; Pavan Balaji; Sherali Zeadally; Qutaibah Marwan Malluhi; Nikos Tziritas; Abhinav Vishnu; Samee U. Khan; Albert Y. Zomaya (Computing, 2016)

Performance analysis of data intensive cloud systems based on data management and replication: a survey. - Saif Ur Rehman Malik; Samee U. Khan; Sam J. Ewen; Nikos Tziritas; Joanna Kolodziej; Albert Y. Zomaya; Sajjad Ahmad Madani; Nasro Min-Allah; Lizhe Wang 001; Cheng-Zhong Xu 001; Qutaibah M. Malluhi; Johnatan E. Pecero; et al. (Distributed Parallel Databases, 2016)

Towards adaptable and tunable cloud-based map-matching strategy for GPS trajectories. - Aftab Ahmed Chandio; Nikos Tziritas; Fan Zhang 019; Ling Yin 001; Cheng-Zhong Xu 001 (Frontiers Inf. Technol. Electron. Eng., 2016)

On Improving Constrained Single and Group Operator Placement Using Evictions in Big Data Environments. - Nikos Tziritas; Thanasis Loukopoulos; Samee U. Khan; Cheng-Zhong Xu 001; Albert Y. Zomaya (IEEE Trans. Serv. Comput., 2016)

Heuristics for tile parallelism in HEVC. - Maria G. Koziri; Panos K. Papadopoulos; Nikos Tziritas; Nikos Giachoudis; Thanasis Loukopoulos; Samee U. Khan; Georgios I. Stamoulis (EUSIPCO, 2017)

Dynamic Mapping of Application Workflows in Heterogeneous Computing Environments. - Muhammad Qasim; Touseef Iqbal; Ehsan Ullah Munir; Nikos Tziritas; Samee U. Khan; Laurence T. Yang (IPDPS Workshops, 2017)

On Improving the Speedup of Slice and Tile Level Parallelism in HEVC Using AVX2. - Dimitris Skoumpourdis; Panos K. Papadopoulos; Maria G. Koziri; Nikos Tziritas; Thanasis Loukopoulos; Ioannis Anagnostopoulos (PCI, 2017)

On planning the adoption of new video standards in social media networks: a general framework and its application to HEVC. - Maria G. Koziri; Panos K. Papadopoulos; Nikos Tziritas; Antonios N. Dadaliaris; Thanasis Loukopoulos; Georgios I. Stamoulis (Soc. Netw. Anal. Min., 2017)

Leveraging on Deep Memory Hierarchies to Minimize Energy Consumption and Data Access Latency on Single-Chip Cloud Computers. - Tahir Maqsood; Nikos Tziritas; Thanasis Loukopoulos; Sajjad Ahmad Madani; Samee U. Khan; Cheng-Zhong Xu 001 (IEEE Trans. Sustain. Comput., 2017)

Data Replication and Virtual Machine Migrations to Mitigate Network Overhead in Edge Computing Systems. - Nikos Tziritas; Maria G. Koziri; Areti Bachtsevani; Thanasis Loukopoulos; George I. Stamoulis; Samee U. Khan; Cheng-Zhong Xu 001 (IEEE Trans. Sustain. Comput., 2017)

A Pareto-Efficient Algorithm for Data Stream Processing at Network Edges. - Thanasis Loukopoulos; Nikos Tziritas; Maria G. Koziri; Georgios I. Stamoulis; Samee Khan (CloudCom, 2018)

Server Consolidation in Cloud Computing. - Nikos Tziritas; Saad Mustafa; Maria G. Koziri; Thanasis Loukopoulos; Samee U. Khan; Cheng-Zhong Xu 001; Albert Y. Zomaya (ICPADS, 2018)

Data Stream Processing at Network Edges. - Thanasis Loukopoulos; Nikos Tziritas; Maria G. Koziri; George I. Stamoulis; Samee U. Khan; Cheng-Zhong Xu 001; Albert Y. Zomaya (IPDPS Workshops, 2018)

Scheduling Video Transcoding Jobs in the Cloud. - Panagiotis Oikonomou; Maria G. Koziri; Nikos Tziritas; Antonios N. Dadaliaris; Thanasis Loukopoulos; Georgios I. Stamoulis; Samee U. Khan (iThings/GreenCom/CPSCom/SmartData, 2018)

On the Evaluation of Coarse Grained Parallelism in AV1 Video Coding. - Panos K. Papadopoulos; Maria G. Koziri; Nikos Tziritas; Thanasis Loukopoulos; Ioannis Anagnostopoulos; Petr Saloun; David Andresic (SMAP, 2018)

A Communication-Aware Energy-Efficient Graph-Coloring Algorithm for VM Placement in Clouds. - Nikos Tziritas; Thanasis Loukopoulos; Samee Khan; Cheng-Zhong Xu 001; Albert Y. Zomaya (SmartWorld/SCALCOM/UIC/ATC/CBDCom/IOP/SCI, 2018)

The Next Generation Cognitive Security Operations Center: Network Flow Forensics Using Cybersecurity Intelligence. - Konstantinos Demertzis; Panayiotis Kikiras; Nikos Tziritas; Salvador Llopis Sánchez; Lazaros Iliadis 001 (Big Data Cogn. Comput., 2018)

Efficient Cloud Provisioning for Video Transcoding: Review, Open Challenges and Future Opportunities. - Maria G. Koziri; Panos K. Papadopoulos; Nikos Tziritas; Thanasis Loukopoulos; Samee U. Khan; Albert Y. Zomaya (IEEE Internet Comput., 2018)

Energy and communication aware task mapping for MPSoCs. - Tahir Maqsood; Nikos Tziritas; Thanasis Loukopoulos; Sajjad Ahmad Madani; Samee U. Khan; Cheng-Zhong Xu 001; Albert Y. Zomaya (J. Parallel Distributed Comput., 2018)

Evaluation of Heterogeneous Scheduling Algorithms for Wavefront and Tile Parallelism in Video Coding. - Natalia Panagou; Maria G. Koziri; Panos K. Papadopoulos; Panagiotis Oikonomou; Nikos Tziritas; Kostas Kolomvatsos; Thanasis Loukopoulos; Samee U. Khan (ICIOT, 2019)

Cyber-Typhon: An Online Multi-task Anomaly Detection Framework. - Konstantinos Demertzis; Lazaros S. Iliadis; Panayiotis Kikiras; Nikos Tziritas (AIAI, 2019)

Online Live VM Migration Algorithms to Minimize Total Migration Time and Downtime. - Nikos Tziritas; Thanasis Loukopoulos; Samee Khan; Cheng-Zhong Xu 001; Albert Y. Zomaya (IPDPS, 2019)

The Next Generation Cognitive Security Operations Center: Adaptive Analytic Lambda Architecture for Efficient Defense against Adversarial Attacks. - Konstantinos Demertzis; Nikos Tziritas; Panayiotis Kikiras; Salvador Llopis Sánchez; Lazaros Iliadis 001 (Big Data Cogn. Comput., 2019)

Energy efficient VM scheduling strategies for HPC workloads in cloud data centers. - Aftab Ahmed Chandio; Nikos Tziritas; Muhammad Saleem Chandio; Cheng-Zhong Xu 001 (Sustain. Comput. Informatics Syst., 2019)

Graph-based Approaches for the Interval Scheduling Problem. - Panagiotis Oikonomou; Nikos Tziritas; Georgios Theodoropoulos 001; Maria G. Koziri; Thanasis Loukopoulos; Samee U. Khan (ICPADS, 2020)

Uncertainty Driven Workflow Scheduling Using Unreliable Cloud Resources. - Panagiotis Oikonomou; Kostas Kolomvatsos; Nikos Tziritas; Georgios Theodoropoulos 001; Thanasis Loukopoulos; Georgios I. Stamoulis (NCA, 2020)

Efficient Direct Agent Interaction in Optimistic Distributed Multi-Agent-System Simulations. - Shuyi Chen; Masatoshi Hanai; Zhengchang Hua; Nikos Tziritas; Georgios Theodoropoulos 001 (SIGSIM-PADS, 2020)

A Fuzzy Logic Controller for Tasks Scheduling Using Unreliable Cloud Resources. - Panagiotis Oikonomou; Kostas Kolomvatsos; Nikos Tziritas; Georgios Theodoropoulos 001; Thanasis Loukopoulos; Georgios I. Stamoulis (CoRR, 2020)

Anomaly detection via blockchained deep learning smart contracts in industry 4.0. - Konstantinos Demertzis; Lazaros Iliadis 001; Nikos Tziritas; Panagiotis Kikiras (Neural Comput. Appl., 2020)

Online Inter-Datacenter Service Migrations. - Nikos Tziritas; Samee U. Khan; Thanasis Loukopoulos; Spyros Lalis; Cheng-Zhong Xu 001; Keqin Li 001; Albert Y. Zomaya (IEEE Trans. Cloud Comput., 2020)

Blockchained Adaptive Federated Auto MetaLearning BigData and DevOps CyberSecurity Architecture in Industry 4.0. - Konstantinos Demertzis; Lazaros Iliadis 001; Elias Pimenidis; Nikolaos Tziritas; Maria G. Koziri; Panagiotis Kikiras (EANN, 2021)

A Probabilistic Batch Oriented Proactive Workflow Management. - Panagiotis Oikonomou; Kostas Kolomvatsos; Christos Anagnostopoulos 001; Nikos Tziritas; Georgios Theodoropoulos 001 (ICTAI, 2021)

Federated Blockchained Supply Chain Management: A CyberSecurity and Privacy Framework. - Konstantinos Demertzis; Lazaros Iliadis 001; Elias Pimenidis; Nikolaos Tziritas; Maria G. Koziri; Panagiotis Kikiras; Michael Tonkin (AIAI, 2021)

Fast Heuristics for Mixed Fleet Capacitated Multiple TSP with Applications to Location Based Games and Drone Assisted Transportation. - Panagiotis Oikonomou; Nikos Tziritas; Kostas Kolomvatsos; Thanasis Loukopoulos (PCI, 2021)

Bin Packing Heuristics for the Multiple Workflow Scheduling Problem. - Nikos Pappas; Panagiotis Oikonomou; Nikos Tziritas; Kostas Kolomvatsos; Thanasis Loukopoulos (PCI, 2021)

Time-Efficient and High-Quality Graph Partitioning for Graph Dynamic Scaling. - Masatoshi Hanai; Nikos Tziritas; Toyotaro Suzumura; Wentong Cai 001; Georgios Theodoropoulos 001 (CoRR, 2021)

Dynamic Data-Driven Digital Twins for Blockchain Systems. - Georgios Diamantopoulos; Nikos Tziritas; Rami Bahsoon; Georgios Theodoropoulos 001 (DDDAS, 2022)

Explainable Human-in-the-Loop Dynamic Data-Driven Digital Twins. - Nan Zhang; Rami Bahsoon; Nikos Tziritas; Georgios Theodoropoulos 001 (DDDAS, 2022)

Digital Twins for Dynamic Management of Blockchain Systems. - Georgios Diamantopoulos; Nikos Tziritas; Rami Bahsoon; Georgios Theodoropoulos 001 (WSC, 2022)

A Baselined Gated Attention Recurrent Network for Request Prediction in Ridesharing. - Jingran Shen; Nikos Tziritas; Georgios Theodoropoulos 001 (IEEE Access, 2022)

Online Algorithms for the Interval Scheduling Problem in the Cloud: Affinity Pair Threshold Based Approaches. - Panagiotis Oikonomou; Nikos Tziritas; Thanasis Loukopoulos; Georgios Theodoropoulos 001; Masatoshi Hanai; Samee U. Khan (IEEE Trans. Sustain. Comput., 2022)

Dynamic Blockchain Reconfiguration: Balancing the Trilemma Trade-off Using Digital Twins. - Georgios Diamantopoulos; Nikos Tziritas; Rami Bahsoon; Georgios Theodoropoulos 001 (DS-RT, 2023)

Federated Digital Twin. - Christian Vergara; Rami Bahsoon; Georgios Theodoropoulos 001; Wendy Yánez; Nikos Tziritas (DS-RT, 2023)

SymBChainSim: A Novel Simulation Tool for Dynamic and Adaptive Blockchain Management and its Trilemma Tradeoff. - Georgios Diamantopoulos; Rami Bahsoon; Nikos Tziritas; Georgios Theodoropoulos 001 (SIGSIM-PADS, 2023)

A Digital Twin Approach for Adaptive Compliance in Cyber-Physical Systems: Case of Smart Warehouse Logistics. - Nan Zhang; Rami Bahsoon; Nikos Tziritas; Georgios Theodoropoulos 001 (CoRR, 2023)

Machine Failure Prediction Using Survival Analysis. - Dimitris Papathanasiou; Konstantinos Demertzis; Nikos Tziritas (Future Internet, 2023)

Dynamic Digital Twins of Blockchain Systems: State Extraction and Mirroring. - Georgios Diamantopoulos; Nikos Tziritas; Rami Bahsoon; Nan Zhang; Georgios Theodoropoulos 001 (DS-RT, 2024)

Distributed Simulation for Digital Twins of Large-Scale Real-World DiffServ-Based Networks. - Zhuoyao Huang; Nan Zhang; Jingran Shen; Georgios Diamantopoulos; Zhengchang Hua; Nikos Tziritas; Georgios Theodoropoulos 001 (Euro-Par (3), 2024)

Efficient Placement of Interdependent Services in Multi-access Edge Computing. - Shuyi Chen; Panagiotis Oikonomou; Zhengchang Hua; Nikos Tziritas; Karim Djemame; Nan Zhang; Georgios Theodoropoulos 001 (GECON, 2024)

Towards a Flexible Accuracy-Oriented Deep Learning Module Inference Latency Prediction Framework for Adaptive Optimization Algorithms. - Jingran Shen; Nikos Tziritas; Georgios Theodoropoulos 001 (IIP (1), 2024)

Towards LLM Augmented Discrete Event Simulation of Blockchain Systems. - Georgios Diamantopoulos; Georgios Theodoropoulos 001; Nikos Tziritas; Rami Bahsoon (SIGSIM-PADS, 2024)

Federated Digital Twins as an Enabling Technology for Collaborative Decision-Making. - Christian Roberto Vergara; Georgios Theodoropoulos 001; Rami Bahsoon; Wendy Yánez; Nikos Tziritas (SIGSIM-PADS, 2024)

A Framework for Digital Twin Collaboration. - Zhengchang Hua; Karim Djemame; Nikos Tziritas; Georgios Theodoropoulos 001 (WSC, 2024)

Large Language Models for Explainable Decisions in Dynamic Digital Twins. - Nan Zhang; Christian Roberto Vergara Marcillo; Georgios Diamantopoulos; Jingran Shen; Nikos Tziritas; Rami Bahsoon; Georgios Theodoropoulos 001 (CoRR, 2024)

Knowledge Equivalence in Digital Twins of Intelligent Systems. - Nan Zhang; Rami Bahsoon; Nikos Tziritas; Georgios Theodoropoulos 001 (ACM Trans. Model. Comput. Simul., 2024)

A Connectionist Approach to Federated Digital Twins. - Christian Roberto Vergara Marcillo; Rami Bahsoon; Nikos Tziritas; Georgios Theodoropoulos 001 (ICCS (3), 2025)

SymBChainSim: A Novel Simulation System for Info-Symbiotic Blockchain Management. - Georgios Diamantopoulos; Rami Bahsoon; Nikos Tziritas; Georgios Theodoropoulos 001 (ACM Trans. Model. Comput. Simul., 2025)