Helen D. Karatza

Publication Activity (10 Years)

Years Active: 1986-2023
Publications (10 Years): 85

Top Venues

Simul. Model. Pract. Theory

CITS

FiCloud

Concurr. Comput. Pract. Exp.

Publications

Georgios L. Stavrinides, Helen D. Karatza
Scheduling Linear Workflows with Dynamically Adjustable Exit Tasks on Distributed Resources. ISADS (2023)
Helen D. Karatza
Scheduling Delay-Sensitive Bag-of-Task Jobs with Imprecise Computations on Distributed Resources. CITS (2023)
Georgios L. Stavrinides, Helen D. Karatza
Cyber-physical systems, digital twins and Industry 4.0: The role of modeling and simulation. Simul. Model. Pract. Theory 124 (2023)
Helen D. Karatza
Scheduling Critical Periodic Jobs with Partial Computations along with Gang Jobs. FiCloud (2023)
Helen D. Karatza
Scheduling Different Types of Linear Workflows with Partial Computations in a Distributed System. CCCI (2023)
Helen D. Karatza
Introduction on cloud, fog and mist computing - Resource allocation and scheduling perspectives. Simul. Model. Pract. Theory 128 (2023)
Ilias Mavridis, Helen D. Karatza
Orchestrated sandboxed containers, unikernels, and virtual machines for isolation-enhanced multitenant workloads and serverless computing in cloud. Concurr. Comput. Pract. Exp. 35 (11) (2023)
Georgios L. Stavrinides, Helen D. Karatza
Resource Allocation and Scheduling of Linear Workflow Applications with Ageing Priorities and Transient Failures. AICCSA (2022)
Georgios L. Stavrinides, Helen D. Karatza
Scheduling Tightly Coupled Parallel Jobs With Runtime-Extended Tasks on Distributed Resources. CCCI (2022)
Georgios L. Stavrinides, Helen D. Karatza
Resource Allocation and Scheduling of Real-Time Workflow Applications in an IoT-Fog-Cloud Environment. FMEC (2022)
Georgios L. Stavrinides, Helen D. Karatza
Workload Scheduling in Fog and Cloud Environments: Emerging Concepts and Research Directions. Honoring Professor Mohammad S. Obaidat (2022)
Georgios L. Stavrinides, Helen D. Karatza
"Containerization, microservices and serverless cloud computing: Modeling and simulation". Simul. Model. Pract. Theory 118 (2022)
Georgios L. Stavrinides, Helen D. Karatza
Leveraging blockchain and AI for IoT, mist, fog and cloud computing: A performance modeling and simulation perspective. Simul. Model. Pract. Theory 121 (2022)
Georgios L. Stavrinides, Helen D. Karatza
The Effect of Laxity of Real-Time Workflow Applications on the Performance of Elastic Cloud Resources. FiCloud (2022)
Georgios L. Stavrinides, Helen D. Karatza
Security-Aware Orchestration of Linear Workflows on Distributed Resources. CITS (2022)
Georgios L. Stavrinides, Helen D. Karatza
Fault-Tolerant Orchestration of Bags-of-Tasks with Application-Directed Checkpointing in a Distributed Environment. CCCI (2021)
Georgios L. Stavrinides, Helen D. Karatza
Guest editors' introduction: "Modeling and simulation of hybrid clouds". Simul. Model. Pract. Theory 111 (2021)
Helen D. Karatza, Igor V. Kotenko
Guest Editors' Introduction "Modeling and Simulation for Intelligent Distributed Computing". Simul. Model. Pract. Theory 109 (2021)
Georgios L. Stavrinides, Helen D. Karatza
Security and Cost Aware Scheduling of Real-Time IoT Workflows in a Mist Computing Environment. FiCloud (2021)
Georgios L. Stavrinides, Helen D. Karatza
Orchestrating real-time IoT workflows in a fog computing environment utilizing partial computations with end-to-end error propagation. Clust. Comput. 24 (4) (2021)
Helen D. Karatza
Keynote Speech 1: Leveraging Cloud and Fog Computing for Real-Time Applications: Resource Allocation and Scheduling Issues. IDSTA (2021)
Georgios L. Stavrinides, Helen D. Karatza
Cost-aware cloud bursting in a fog-cloud environment with real-time workflow applications. Concurr. Comput. Pract. Exp. 33 (23) (2021)
Dimitrios Tychalas, Helen D. Karatza
SaMW: a probabilistic meta-heuristic algorithm for job scheduling in heterogeneous distributed systems powered by microservices. Clust. Comput. 24 (3) (2021)
Georgios L. Stavrinides, Helen D. Karatza
Dynamic scheduling of bags-of-tasks with sensitive input data and end-to-end deadlines in a hybrid cloud. Multim. Tools Appl. 80 (11) (2021)
Georgios L. Stavrinides, Helen D. Karatza
Orchestrating Bag-of-Tasks Applications with Dynamically Spawned Tasks in a Distributed Environment. SPECTS (2021)
Georgios L. Stavrinides, Helen D. Karatza
Multicriteria scheduling of linear workflows with dynamically varying structure on distributed platforms. Simul. Model. Pract. Theory 112 (2021)
Georgios L. Stavrinides, Helen D. Karatza
Scheduling Real-Time IoT Workflows in a Fog Computing Environment Utilizing Cloud Resources with Data-Aware Elasticity. FMEC (2021)
Georgios L. Stavrinides, Helen D. Karatza
Resource Assignment Strategies for Bags-of-Tasks in Distributed Systems. CITS (2021)
Helen D. Karatza
Large Scale Real-time Distributed Systems - Resource Allocation and Scheduling Issues. ECBS (2021)
Georgios L. Stavrinides, Helen D. Karatza
Scheduling real-time bag-of-tasks applications with approximate computations in SaaS clouds. Concurr. Comput. Pract. Exp. 32 (1) (2020)
Georgios L. Stavrinides, Helen D. Karatza
Multi-Criteria Scheduling of Complex Workloads on Distributed Resources. CITS (2020)
Vasco Amaral, Beatriz Norberto, Miguel Goulão, Marco Aldinucci, Siegfried Benkner, Andrea Bracciali, Paulo Carreira, Edgars Celms, Luís Correia, Clemens Grelck, Helen D. Karatza, Christoph W. Kessler, Peter Kilpatrick, Hugo F. M. C. Martiniano, Ilias Mavridis, Sabri Pllana, Ana Respício, José Simão, Luís Veiga, Ari Visa
Programming languages for data-Intensive HPC applications: A systematic mapping study. Parallel Comput. 91 (2020)
Dimitrios Tychalas, Helen D. Karatza
A Scheduling Algorithm for a Fog Computing System with Bag-of-Tasks Jobs: Simulation and Performance Evaluation. Simul. Model. Pract. Theory 98 (2020)
Georgios L. Stavrinides, Helen D. Karatza
Scheduling a Time-Varying Workload of Multiple Types of Jobs on Distributed Resources. SPECTS (2020)
Helen D. Karatza, Georgios L. Stavrinides
"Modeling and simulation of fog computing". Simul. Model. Pract. Theory 101 (2020)
Georgios L. Stavrinides, Helen D. Karatza
Weighted Scheduling of Mixed Gang Jobs on Distributed Resources. CCCI (2020)
Georgios L. Stavrinides, Helen D. Karatza
Orchestration of Real-Time Workflows with Varying Input Data Locality in a Heterogeneous Fog Environment. FMEC (2020)
Helen D. Karatza
Cloud vs Fog Computing - Scheduling Real-Time Applications. MECO (2020)
Dimitrios Tychalas, Helen D. Karatza
An Advanced Weighted Round Robin Scheduling Algorithm. PCI (2020)
Georgios L. Stavrinides, Helen D. Karatza
An energy-efficient, QoS-aware and cost-effective scheduling approach for real-time workflow applications in cloud computing systems utilizing DVFS and approximate computations. Future Gener. Comput. Syst. 96 (2019)
Ilias Mavridis, Helen D. Karatza
Lightweight Virtualization Approaches for Software-Defined Systems and Cloud Computing: An Evaluation of Unikernels and Containers. SDS (2019)
Georgios L. Stavrinides, Helen D. Karatza
Scheduling Different Types of Gang Jobs in Distributed Systems. CITS (2019)
Georgios L. Stavrinides, Helen D. Karatza
Scheduling Bag-of-Task-Chains in Distributed Systems. ISADS (2019)
Ilias Mavridis, Helen D. Karatza
Combining containers and virtual machines to enhance isolation and extend functionality on cloud computing. Future Gener. Comput. Syst. 94 (2019)
Georgios L. Stavrinides, Helen D. Karatza
Performance evaluation of a SaaS cloud under different levels of workload computational demand variability and tardiness bounds. Simul. Model. Pract. Theory 91 (2019)
Georgios L. Stavrinides, Helen D. Karatza
A hybrid approach to scheduling real-time IoT workflows in fog and cloud environments. Multim. Tools Appl. 78 (17) (2019)
Georgios L. Stavrinides, Helen D. Karatza
Scheduling Single-Task Jobs along with Bag-of-Task-Chains in Distributed Systems. ICFNDS (2019)
Georgios L. Stavrinides, Helen D. Karatza
Cost-Effective Utilization of Complementary Cloud Resources for the Scheduling of Real-Time Workflow Applications in a Fog Environment. FiCloud (2019)
Helen D. Karatza, Georgios L. Stavrinides
Modeling and simulation of cloud computing and big data. Simul. Model. Pract. Theory 93 (2019)
Georgios L. Stavrinides, Helen D. Karatza
The impact of checkpointing interval selection on the scheduling performance of real-time fine-grained parallel applications in SaaS clouds under various failure probabilities. Concurr. Comput. Pract. Exp. 30 (12) (2018)
Dimitrios Tychalas, Helen D. Karatza
Simulation and performance evaluation of a fog system. FMEC (2018)
Stylianos Zikos, Helen D. Karatza
Allocating jobs of different priorities to a distributed system with heterogeneous resources. CITS (2018)
Georgios L. Stavrinides, Helen D. Karatza
The impact of workload variability on the energy efficiency of large-scale heterogeneous distributed systems. Simul. Model. Pract. Theory 89 (2018)
Georgios L. Stavrinides, Helen D. Karatza
Energy-Aware Scheduling of Real-Time Workflow Applications in Clouds Utilizing DVFS and Approximate Computations. FiCloud (2018)
Georgios L. Stavrinides, Helen D. Karatza
Scheduling techniques for complex workloads in distributed systems. ICFNDS (2018)
Francisco Almeida, Marcos Dias de Assunção, Jorge G. Barbosa, Vicente Blanco Pérez, Ivona Brandic, Georges Da Costa, Manuel F. Dolz, Anne C. Elster, Mateusz Jarus, Helen D. Karatza, Laurent Lefèvre, Ilias Mavridis, Ariel Oleksiak, Anne-Cécile Orgerie, Jean-Marc Pierson
Energy monitoring as an essential building block towards sustainable ultrascale systems. Sustain. Comput. Informatics Syst. 17 (2018)
Georgios L. Stavrinides, Helen D. Karatza
Task Group Scheduling in Distributed Systems. CITS (2018)
Joanna Kolodziej, Horacio González-Vélez, Helen D. Karatza
High-performance modelling and simulation for big data applications. Simul. Model. Pract. Theory 76 (2017)
Georgios L. Stavrinides, Helen D. Karatza
Simulation-Based Performance Evaluation of an Energy-Aware Heuristic for the Scheduling of HPC Applications in Large-Scale Distributed Systems. ICPE Companion (2017)
Georgios L. Stavrinides, Helen D. Karatza
Periodic scheduling of mixed workload in distributed systems. ICE/ITMC (2017)
Dimitrios Tychalas, Helen D. Karatza
High performance system based on Cloud and beyond: Jungle Computing. J. Comput. Sci. 22 (2017)
Helen D. Karatza
Energy Efficiency in Large Scale Distributed Systems: The Role of Simulation. ICPE Companion (2017)
Georgios L. Stavrinides, Helen D. Karatza
The impact of data locality on the performance of a SaaS cloud with real-time data-intensive applications. DS-RT (2017)
Ilias Mavridis, Helen D. Karatza
Performance evaluation of cloud-based log file analysis with Apache Hadoop and Apache Spark. J. Syst. Softw. 125 (2017)
Georgios L. Stavrinides, Helen D. Karatza
The Effect of Workload Computational Demand Variability on the Performance of a SaaS Cloud with a Multi-tier SLA. FiCloud (2017)
Ilias Mavridis, Helen D. Karatza
Performance and Overhead Study of Containers Running on Top of Virtual Machines. CBI (2) (2017)
Helen D. Karatza
Smart Cities and Internet of Things. Simul. Model. Pract. Theory 73 (2017)
Georgios L. Stavrinides, Francisco Rodrigo Duro, Helen D. Karatza, Francisco Javier García Blas, Jesús Carretero
Different aspects of workflow scheduling in large-scale distributed systems. Simul. Model. Pract. Theory 70 (2017)
George Terzopoulos, Helen D. Karatza
Bag-of-Tasks Load Balancing on Power-Aware Clusters. PDP (2016)
Rehab Duwairi, Helen D. Karatza
Advances on information and communication systems. Simul. Model. Pract. Theory 64 (2016)
George Terzopoulos, Helen D. Karatza
Power-aware Bag-of-Tasks scheduling on heterogeneous platforms. Clust. Comput. 19 (2) (2016)
Michele Bombardieri, Salvatore Castanò, Fabrizio Curcio, Angelo Furfaro, Helen D. Karatza
Honeypot-Powered Malware Reverse Engineering. IC2E Workshops (2016)
Georgios L. Stavrinides, Helen D. Karatza
Scheduling real-time parallel applications in SaaS clouds in the presence of transient software failures. SPECTS (2016)
Helen D. Karatza, Jesús Carretero
Special issue on "Techniques and applications for sustainable ultrascale computing systems". Simul. Model. Pract. Theory 58 (2015)
Zafeirios C. Papazachos, Helen D. Karatza
Scheduling bags of tasks and gangs in a distributed system. CITS (2015)
Ioannis A. Moschakis, Helen D. Karatza
Multi-criteria scheduling of Bag-of-Tasks applications on heterogeneous interlinked clouds with simulated annealing. J. Syst. Softw. 101 (2015)
Stephen S. Yau, Wei-Tek Tsai, Kenji Takahashi, Xiaoying Bai, Helen D. Karatza
Message from the IWSC 2015 Workshop Organizers. COMPSAC Workshops (2015)
Georgios L. Stavrinides, Helen D. Karatza
A Cost-Effective and QoS-Aware Approach to Scheduling Real-Time Workflow Applications in PaaS and SaaS Clouds. FiCloud (2015)
Michel Bagein, Jorge G. Barbosa, Vicente Blanco Pérez, Ivona Brandic, Samuel Cremer, Sébastien Fremal, Helen D. Karatza, Laurent Lefèvre, Toni Mastelic, Ariel Oleksiak, Anne-Cécile Orgerie, Georgios L. Stavrinides, Sébastien Varrette
Energy Efficiency for Ultrascale Systems: Challenges and Trends from Nesus Project. Supercomput. Front. Innov. 2 (2) (2015)
Helen D. Karatza
Guest editor's introduction: Special issue on resource management in mobile clouds. Simul. Model. Pract. Theory 50 (2015)
Georges Da Costa, Thomas Fahringer, Juan-Antonio Rico-Gallego, Ivan Grasso, Atanas Hristov, Helen D. Karatza, Alexey L. Lastovetsky, Fabrizio Marozzo, Dana Petcu, Georgios L. Stavrinides, Domenico Talia, Paolo Trunfio, Hrachya V. Astsatryan
Exascale Machines Require New Programming Paradigms and Runtimes. Supercomput. Front. Innov. 2 (2) (2015)
Ioannis A. Moschakis, Helen D. Karatza
A meta-heuristic optimization approach to the scheduling of bag-of-tasks applications on heterogeneous clouds with multi-level arrivals and critical jobs. Simul. Model. Pract. Theory 57 (2015)
Kyriaki Skenteridou, Helen D. Karatza
Job scheduling in a grid cluster. CITS (2015)
Dimitris Tychalas, Helen D. Karatza
A cloud system for health care. Panhellenic Conference on Informatics (2015)
Ioannis A. Moschakis, Helen D. Karatza
Towards scheduling for Internet-of-Things applications on clouds: a simulated annealing approach. Concurr. Comput. Pract. Exp. 27 (8) (2015)
George Terzopoulos, Helen D. Karatza
Energy-efficient real-time heterogeneous cluster scheduling with node replacement due to failures. J. Supercomput. 68 (2) (2014)
Helen D. Karatza
Scheduling jobs with different characteristics in distributed systems. CITS (2014)
George Terzopoulos, Helen D. Karatza
Bag-of-Task Scheduling on Power-Aware Clusters Using a DVFS-Based Mechanism. IPDPS Workshops (2014)
Georgios L. Stavrinides, Helen D. Karatza
The impact of resource heterogeneity on the timeliness of hard real-time complex jobs. PETRA (2014)
Fotis Loukos, Helen D. Karatza, Vana Kalogeraki
Real-time data dissemination in mobile peer-to-peer networks. J. Syst. Softw. 90 (2014)
George Terzopoulos, Helen D. Karatza
Dynamic Voltage Scaling Scheduling on Power-Aware Clusters under Power Constraints. DS-RT (2013)
S. R. Chakravarthy, Helen D. Karatza
Two-server parallel system with pure space sharing and Markovian arrivals. Comput. Oper. Res. 40 (1) (2013)
Constandinos X. Mavromoustakis, Helen D. Karatza
Performance Evaluation of Opportunistic Resource-Sharing Scheme Using Socially Oriented Outsourcing in Wireless Devices. Comput. J. 56 (2) (2013)
George Terzopoulos, Helen D. Karatza
Performance evaluation and energy consumption of a real-time heterogeneous grid system using DVS and DPM. Simul. Model. Pract. Theory 36 (2013)
Helen D. Karatza
Special issue on energy efficiency in grids and clouds. Simul. Model. Pract. Theory 39 (2013)
Helen D. Karatza, Constandinos X. Mavromoustakis
Special Issue on Simulation-based Performance Evaluation of Infrastructures for the Internet of Things: Connectivity and resource considerations in the mobility Era. Simul. Model. Pract. Theory 34 (2013)
Kyriaki Gkoutioudi, Helen D. Karatza
A Simulation Study of Multi-criteria Scheduling in Grid Based on Genetic Algorithms. ISPA (2012)
Kyriaki Gkoutioudi, Helen D. Karatza
Multi-Criteria Job Scheduling in Grid Using an Accelerated Genetic Algorithm. J. Grid Comput. 10 (2) (2012)
Zafeirios C. Papazachos, Helen D. Karatza
Scheduling of frequently communicating tasks. Int. J. Commun. Syst. 25 (2) (2012)
Konstantinos I. Karaoglanoglou, Helen D. Karatza
Directing requests and acquiring knowledge in a large-scale Grid system. SPECTS (2012)

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Publication Activity (10 Years)

Top Topics

Top Venues

Helen D. Karatza