Helen D. Karatza

248 papers A 3B 3C 13Misc 4Journal 134Unranked 89
YearRankTypeTitle / Venue / Authors
2026 J jnl
Scheduling mixed workloads with security requirements in a cloud-fog-mist computing environment.
Simul. Model. Pract. Theory
Helen D. Karatza
2025 J jnl
Guest Editors' Introduction on Cloud and Fog Computing for Real-Time IoT Applications.
Simul. Model. Pract. Theory
Helen D. Karatza
2025 J jnl
Research Challenges in the Edge-Cloud Continuum.
Simul. Model. Pract. Theory
Helen D. Karatza
2025 — conf
Scheduling Complex Workloads with Security Constraints in a Cloud-Fog-Mist System.
FiCloud
Helen D. Karatza
2025 J jnl
Scheduling Data-Intensive Workloads in Large-Scale Distributed Systems: Trends and Challenges.
CoRR
Georgios L. Stavrinides, Helen D. Karatza
2025 — conf
Scheduling Gang Jobs with Security Requirements on a Hybrid Cloud.
CITS
Helen D. Karatza
2025 J jnl
Scheduling bag-of-task jobs with security requirements and dual-criteria partial computations in a fog - cloud system.
Simul. Model. Pract. Theory
Helen D. Karatza
2024 — conf
Allocation and Scheduling of Linear Workflows Incorporating Security Constraints Across Fog and Cloud Infrastructures.
CITS
Helen D. Karatza
2024 J jnl
Modeling and Simulation of Cloud Computing for e-Business.
Simul. Model. Pract. Theory
Helen D. Karatza
2024 J jnl
Modeling and simulation of services computing✰.
Simul. Model. Pract. Theory
Helen D. Karatza
2024 J jnl
Resource allocation and aging priority-based scheduling of linear workflow applications with transient failures and selective imprecise computations.
Clust. Comput.
Helen D. Karatza, Georgios L. Stavrinides
2024 — conf
Scheduling Bag-of-Task Jobs with Security Requirements and Partial Computations in a Fog - Cloud System.
FiCloud
Helen D. Karatza
2024 — conf
Scheduling Gang Jobs with Partial Computations in a Collaborative Fog-Cloud System.
ICCA
Helen D. Karatza
2024 — conf
Scheduling Linear Workflows with Multicriteria based Partial Computations in a Cloud-Fog-Mist Environment.
FMEC
Helen D. Karatza
2024 J jnl
Scheduling critical periodic jobs with selective partial computations along with gang jobs.
Big Data Res.
Helen D. Karatza
2024 J jnl
Security, Cost and Energy Aware Scheduling of Real-Time IoT Workflows in a Mist Computing Environment.
Inf. Syst. Frontiers
Georgios L. Stavrinides, Helen D. Karatza
2023 C conf
A Hybrid Epoch Scheduling Scheme of Mixed Workloads with Different Types of Jobs on Distributed Processors.
AICCSA
Helen D. Karatza
2023 J jnl
Cyber-physical systems, digital twins and Industry 4.0: The role of modeling and simulation.
Simul. Model. Pract. Theory
Georgios L. Stavrinides, Helen D. Karatza
2023 J jnl
Introduction on cloud, fog and mist computing - Resource allocation and scheduling perspectives.
Simul. Model. Pract. Theory
Helen D. Karatza
2023 J jnl
Orchestrated sandboxed containers, unikernels, and virtual machines for isolation-enhanced multitenant workloads and serverless computing in cloud.
Concurr. Comput. Pract. Exp.
Ilias Mavridis, Helen D. Karatza
2023 — conf
Scheduling Critical Periodic Jobs with Partial Computations along with Gang Jobs.
FiCloud
Helen D. Karatza
2023 — conf
Scheduling Delay-Sensitive Bag-of-Task Jobs with Imprecise Computations on Distributed Resources.
CITS
Helen D. Karatza
2023 — conf
Scheduling Different Types of Linear Workflows with Partial Computations in a Distributed System.
CCCI
Helen D. Karatza
2023 C conf
Scheduling Linear Workflows with Dynamically Adjustable Exit Tasks on Distributed Resources.
ISADS
Georgios L. Stavrinides, Helen D. Karatza
2023 — conf
Scheduling Linear Workflows with Various Levels of Privacy Requirements in a Fog - Cloud Environment.
ICCTA
Helen D. Karatza
2022 J jnl
"Containerization, microservices and serverless cloud computing: Modeling and simulation".
Simul. Model. Pract. Theory
Georgios L. Stavrinides, Helen D. Karatza
2022 J jnl
Leveraging blockchain and AI for IoT, mist, fog and cloud computing: A performance modeling and simulation perspective.
Simul. Model. Pract. Theory
Georgios L. Stavrinides, Helen D. Karatza
2022 C conf
Resource Allocation and Scheduling of Linear Workflow Applications with Ageing Priorities and Transient Failures.
AICCSA
Georgios L. Stavrinides, Helen D. Karatza
2022 — conf
Resource Allocation and Scheduling of Real-Time Workflow Applications in an IoT-Fog-Cloud Environment.
FMEC
Georgios L. Stavrinides, Helen D. Karatza
2022 — conf
Scheduling Tightly Coupled Parallel Jobs With Runtime-Extended Tasks on Distributed Resources.
CCCI
Georgios L. Stavrinides, Helen D. Karatza
2022 — conf
Security-Aware Orchestration of Linear Workflows on Distributed Resources.
CITS
Georgios L. Stavrinides, Helen D. Karatza
2022 — conf
The Effect of Laxity of Real-Time Workflow Applications on the Performance of Elastic Cloud Resources.
FiCloud
Georgios L. Stavrinides, Helen D. Karatza
2022 — conf
Workload Scheduling in Fog and Cloud Environments: Emerging Concepts and Research Directions.
Honoring Professor Mohammad S. Obaidat
Georgios L. Stavrinides, Helen D. Karatza
2021 J jnl
Cost-aware cloud bursting in a fog-cloud environment with real-time workflow applications.
Concurr. Comput. Pract. Exp.
Georgios L. Stavrinides, Helen D. Karatza
2021 J jnl
Dynamic scheduling of bags-of-tasks with sensitive input data and end-to-end deadlines in a hybrid cloud.
Multim. Tools Appl.
Georgios L. Stavrinides, Helen D. Karatza
2021 — conf
Fault-Tolerant Orchestration of Bags-of-Tasks with Application-Directed Checkpointing in a Distributed Environment.
CCCI
Georgios L. Stavrinides, Helen D. Karatza
2021 J jnl
Guest Editors' Introduction "Modeling and Simulation for Intelligent Distributed Computing".
Simul. Model. Pract. Theory
Helen D. Karatza, Igor V. Kotenko
2021 J jnl
Guest editors' introduction: "Modeling and simulation of hybrid clouds".
Simul. Model. Pract. Theory
Georgios L. Stavrinides, Helen D. Karatza
2021 — conf
Keynote Speech 1: Leveraging Cloud and Fog Computing for Real-Time Applications: Resource Allocation and Scheduling Issues.
IDSTA
Helen D. Karatza
2021 — conf
Large Scale Real-time Distributed Systems - Resource Allocation and Scheduling Issues.
ECBS
Helen D. Karatza
2021 J jnl
Multicriteria scheduling of linear workflows with dynamically varying structure on distributed platforms.
Simul. Model. Pract. Theory
Georgios L. Stavrinides, Helen D. Karatza
2021 — conf
Orchestrating Bag-of-Tasks Applications with Dynamically Spawned Tasks in a Distributed Environment.
SPECTS
Georgios L. Stavrinides, Helen D. Karatza
2021 J jnl
Orchestrating real-time IoT workflows in a fog computing environment utilizing partial computations with end-to-end error propagation.
Clust. Comput.
Georgios L. Stavrinides, Helen D. Karatza
2021 — conf
Resource Assignment Strategies for Bags-of-Tasks in Distributed Systems.
CITS
Georgios L. Stavrinides, Helen D. Karatza
2021 J jnl
SaMW: a probabilistic meta-heuristic algorithm for job scheduling in heterogeneous distributed systems powered by microservices.
Clust. Comput.
Dimitrios Tychalas, Helen D. Karatza
2021 — conf
Scheduling Real-Time IoT Workflows in a Fog Computing Environment Utilizing Cloud Resources with Data-Aware Elasticity.
FMEC
Georgios L. Stavrinides, Helen D. Karatza
2021 — conf
Security and Cost Aware Scheduling of Real-Time IoT Workflows in a Mist Computing Environment.
FiCloud
Georgios L. Stavrinides, Helen D. Karatza
2020 J jnl
"Modeling and simulation of fog computing".
Simul. Model. Pract. Theory
Helen D. Karatza, Georgios L. Stavrinides
2020 J jnl
A Scheduling Algorithm for a Fog Computing System with Bag-of-Tasks Jobs: Simulation and Performance Evaluation.
Simul. Model. Pract. Theory
Dimitrios Tychalas, Helen D. Karatza
2020 — conf
An Advanced Weighted Round Robin Scheduling Algorithm.
PCI
Dimitrios Tychalas, Helen D. Karatza
2020 — conf
Cloud vs Fog Computing - Scheduling Real-Time Applications.
MECO
Helen D. Karatza
2020 — conf
Multi-Criteria Scheduling of Complex Workloads on Distributed Resources.
CITS
Georgios L. Stavrinides, Helen D. Karatza
2020 — conf
Orchestration of Real-Time Workflows with Varying Input Data Locality in a Heterogeneous Fog Environment.
FMEC
Georgios L. Stavrinides, Helen D. Karatza
2020 J jnl
Programming languages for data-Intensive HPC applications: A systematic mapping study.
Parallel Comput.
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
2020 — conf
Scheduling a Time-Varying Workload of Multiple Types of Jobs on Distributed Resources.
SPECTS
Georgios L. Stavrinides, Helen D. Karatza
2020 J jnl
Scheduling real-time bag-of-tasks applications with approximate computations in SaaS clouds.
Concurr. Comput. Pract. Exp.
Georgios L. Stavrinides, Helen D. Karatza
2020 — conf
Weighted Scheduling of Mixed Gang Jobs on Distributed Resources.
CCCI
Georgios L. Stavrinides, Helen D. Karatza
2019 J jnl
A hybrid approach to scheduling real-time IoT workflows in fog and cloud environments.
Multim. Tools Appl.
Georgios L. Stavrinides, Helen D. Karatza
2019 J jnl
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.
Georgios L. Stavrinides, Helen D. Karatza
2019 J jnl
Combining containers and virtual machines to enhance isolation and extend functionality on cloud computing.
Future Gener. Comput. Syst.
Ilias Mavridis, Helen D. Karatza
2019 — conf
Cost-Effective Utilization of Complementary Cloud Resources for the Scheduling of Real-Time Workflow Applications in a Fog Environment.
FiCloud
Georgios L. Stavrinides, Helen D. Karatza
2019 — conf
Lightweight Virtualization Approaches for Software-Defined Systems and Cloud Computing: An Evaluation of Unikernels and Containers.
SDS
Ilias Mavridis, Helen D. Karatza
2019 J jnl
Modeling and simulation of cloud computing and big data.
Simul. Model. Pract. Theory
Helen D. Karatza, Georgios L. Stavrinides
2019 J jnl
Performance evaluation of a SaaS cloud under different levels of workload computational demand variability and tardiness bounds.
Simul. Model. Pract. Theory
Georgios L. Stavrinides, Helen D. Karatza
2019 C conf
Scheduling Bag-of-Task-Chains in Distributed Systems.
ISADS
Georgios L. Stavrinides, Helen D. Karatza
2019 — conf
Scheduling Different Types of Gang Jobs in Distributed Systems.
CITS
Georgios L. Stavrinides, Helen D. Karatza
2019 — conf
Scheduling Single-Task Jobs along with Bag-of-Task-Chains in Distributed Systems.
ICFNDS
Georgios L. Stavrinides, Helen D. Karatza
2018 — conf
Allocating jobs of different priorities to a distributed system with heterogeneous resources.
CITS
Stylianos Zikos, Helen D. Karatza
2018 J jnl
Energy monitoring as an essential building block towards sustainable ultrascale systems.
Sustain. Comput. Informatics Syst.
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
2018 — conf
Energy-Aware Scheduling of Real-Time Workflow Applications in Clouds Utilizing DVFS and Approximate Computations.
FiCloud
Georgios L. Stavrinides, Helen D. Karatza
2018 — ch.
Scheduling Data-Intensive Workloads in Large-Scale Distributed Systems: Trends and Challenges.
Modeling and Simulation in HPC and Cloud Systems
Georgios L. Stavrinides, Helen D. Karatza
2018 — conf
Scheduling techniques for complex workloads in distributed systems.
ICFNDS
Georgios L. Stavrinides, Helen D. Karatza
2018 — conf
Simulation and performance evaluation of a fog system.
FMEC
Dimitrios Tychalas, Helen D. Karatza
2018 — conf
Task Group Scheduling in Distributed Systems.
CITS
Georgios L. Stavrinides, Helen D. Karatza
2018 J jnl
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.
Georgios L. Stavrinides, Helen D. Karatza
2018 J jnl
The impact of workload variability on the energy efficiency of large-scale heterogeneous distributed systems.
Simul. Model. Pract. Theory
Georgios L. Stavrinides, Helen D. Karatza
2017 J jnl
Different aspects of workflow scheduling in large-scale distributed systems.
Simul. Model. Pract. Theory
Georgios L. Stavrinides, Francisco Rodrigo Duro, Helen D. Karatza, Francisco Javier García Blas, Jesús Carretero
2017 — conf
Energy Efficiency in Large Scale Distributed Systems: The Role of Simulation.
ICPE Companion
Helen D. Karatza
2017 J jnl
High performance system based on Cloud and beyond: Jungle Computing.
J. Comput. Sci.
Dimitrios Tychalas, Helen D. Karatza
2017 J jnl
High-performance modelling and simulation for big data applications.
Simul. Model. Pract. Theory
Joanna Kolodziej, Horacio González-Vélez, Helen D. Karatza
2017 — conf
Performance and Overhead Study of Containers Running on Top of Virtual Machines.
CBI (2)
Ilias Mavridis, Helen D. Karatza
2017 J jnl
Performance evaluation of cloud-based log file analysis with Apache Hadoop and Apache Spark.
J. Syst. Softw.
Ilias Mavridis, Helen D. Karatza
2017 — conf
Periodic scheduling of mixed workload in distributed systems.
ICE/ITMC
Georgios L. Stavrinides, Helen D. Karatza
2017 — conf
Simulation-Based Performance Evaluation of an Energy-Aware Heuristic for the Scheduling of HPC Applications in Large-Scale Distributed Systems.
ICPE Companion
Georgios L. Stavrinides, Helen D. Karatza
2017 J jnl
Smart Cities and Internet of Things.
Simul. Model. Pract. Theory
Helen D. Karatza
2017 — conf
The Effect of Workload Computational Demand Variability on the Performance of a SaaS Cloud with a Multi-tier SLA.
FiCloud
Georgios L. Stavrinides, Helen D. Karatza
2017 C conf
The impact of data locality on the performance of a SaaS cloud with real-time data-intensive applications.
DS-RT
Georgios L. Stavrinides, Helen D. Karatza
2016 J jnl
Advances on information and communication systems.
Simul. Model. Pract. Theory
Rehab Duwairi, Helen D. Karatza
2016 C conf
Bag-of-Tasks Load Balancing on Power-Aware Clusters.
PDP
George Terzopoulos, Helen D. Karatza
2016 — conf
Honeypot-Powered Malware Reverse Engineering.
IC2E Workshops
Michele Bombardieri, Salvatore Castanò, Fabrizio Curcio, Angelo Furfaro, Helen D. Karatza
2016 J jnl
Power-aware Bag-of-Tasks scheduling on heterogeneous platforms.
Clust. Comput.
George Terzopoulos, Helen D. Karatza
2016 — conf
Scheduling real-time parallel applications in SaaS clouds in the presence of transient software failures.
SPECTS
Georgios L. Stavrinides, Helen D. Karatza
2015 — conf
A Cost-Effective and QoS-Aware Approach to Scheduling Real-Time Workflow Applications in PaaS and SaaS Clouds.
FiCloud
Georgios L. Stavrinides, Helen D. Karatza
2015 — conf
A cloud system for health care.
Panhellenic Conference on Informatics
Dimitris Tychalas, Helen D. Karatza
2015 J jnl
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
Ioannis A. Moschakis, Helen D. Karatza
2015 J jnl
Energy Efficiency for Ultrascale Systems: Challenges and Trends from Nesus Project.
Supercomput. Front. Innov.
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
2015 J jnl
Exascale Machines Require New Programming Paradigms and Runtimes.
Supercomput. Front. Innov.
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
2015 J jnl
Guest editor's introduction: Special issue on resource management in mobile clouds.
Simul. Model. Pract. Theory
Helen D. Karatza
2015 — conf
Job scheduling in a grid cluster.
CITS
Kyriaki Skenteridou, Helen D. Karatza
2015 — conf
Message from the IWSC 2015 Workshop Organizers.
COMPSAC Workshops
Stephen S. Yau, Wei-Tek Tsai, Kenji Takahashi, Xiaoying Bai, Helen D. Karatza
2015 J jnl
Multi-criteria scheduling of Bag-of-Tasks applications on heterogeneous interlinked clouds with simulated annealing.
J. Syst. Softw.
Ioannis A. Moschakis, Helen D. Karatza
2015 — conf
Scheduling bags of tasks and gangs in a distributed system.
CITS
Zafeirios C. Papazachos, Helen D. Karatza
2015 J jnl
Special issue on "Techniques and applications for sustainable ultrascale computing systems".
Simul. Model. Pract. Theory
Helen D. Karatza, Jesús Carretero
2015 J jnl
Towards scheduling for Internet-of-Things applications on clouds: a simulated annealing approach.
Concurr. Comput. Pract. Exp.
Ioannis A. Moschakis, Helen D. Karatza
2014 — conf
Bag-of-Task Scheduling on Power-Aware Clusters Using a DVFS-Based Mechanism.
IPDPS Workshops
George Terzopoulos, Helen D. Karatza
2014 J jnl
Energy-efficient real-time heterogeneous cluster scheduling with node replacement due to failures.
J. Supercomput.
George Terzopoulos, Helen D. Karatza
2014 J jnl
Real-time data dissemination in mobile peer-to-peer networks.
J. Syst. Softw.
Fotis Loukos, Helen D. Karatza, Vana Kalogeraki
2014 — conf
Scheduling jobs with different characteristics in distributed systems.
CITS
Helen D. Karatza
2014 — conf
The impact of resource heterogeneity on the timeliness of hard real-time complex jobs.
PETRA
Georgios L. Stavrinides, Helen D. Karatza
2013 C conf
Dynamic Voltage Scaling Scheduling on Power-Aware Clusters under Power Constraints.
DS-RT
George Terzopoulos, Helen D. Karatza
2013 J jnl
Performance Evaluation of Opportunistic Resource-Sharing Scheme Using Socially Oriented Outsourcing in Wireless Devices.
Comput. J.
Constandinos X. Mavromoustakis, Helen D. Karatza
2013 J jnl
Performance evaluation and energy consumption of a real-time heterogeneous grid system using DVS and DPM.
Simul. Model. Pract. Theory
George Terzopoulos, Helen D. Karatza
2013 J jnl
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
Helen D. Karatza, Constandinos X. Mavromoustakis
2013 J jnl
Special issue on energy efficiency in grids and clouds.
Simul. Model. Pract. Theory
Helen D. Karatza
2013 J jnl
Two-server parallel system with pure space sharing and Markovian arrivals.
Comput. Oper. Res.
S. R. Chakravarthy, Helen D. Karatza
2012 C conf
A Simulation Study of Multi-criteria Scheduling in Grid Based on Genetic Algorithms.
ISPA
Kyriaki Gkoutioudi, Helen D. Karatza
2012 J jnl
A tier-based asynchronous scheduling scheme for delay constrained energy efficient connectivity in asymmetrical wireless devices.
J. Supercomput.
Constandinos X. Mavromoustakis, Helen D. Karatza
2012 — conf
Directing requests and acquiring knowledge in a large-scale Grid system.
SPECTS
Konstantinos I. Karaoglanoglou, Helen D. Karatza
2012 J jnl
Evaluation of gang scheduling performance and cost in a cloud computing system.
J. Supercomput.
Ioannis A. Moschakis, Helen D. Karatza
2012 C conf
Maximizing Performance and Energy Efficiency of a Real-Time Heterogeneous 2-Level Grid System Using DVS.
DS-RT
George Terzopoulos, Helen D. Karatza
2012 J jnl
Multi-Criteria Job Scheduling in Grid Using an Accelerated Genetic Algorithm.
J. Grid Comput.
Kyriaki Gkoutioudi, Helen D. Karatza
2012 — conf
Parallel Job Scheduling on a Dynamic Cloud Model with Variable Workload and Active Balancing.
Panhellenic Conference on Informatics
Ioannis A. Moschakis, Helen D. Karatza
2012 J jnl
Performance evaluation of a real-time grid system using power-saving capable processors.
J. Supercomput.
George Terzopoulos, Helen D. Karatza
2012 C conf
Performance of Clouds - Issues and Research Directions.
CLOSER
Helen D. Karatza
2012 J jnl
Scheduling of frequently communicating tasks.
Int. J. Commun. Syst.
Zafeirios C. Papazachos, Helen D. Karatza
2012 J jnl
Scheduling real-time DAGs in heterogeneous clusters by combining imprecise computations and bin packing techniques for the exploitation of schedule holes.
Future Gener. Comput. Syst.
Georgios L. Stavrinides, Helen D. Karatza
2012 — conf
Topic 2: Performance Prediction and Evaluation.
Euro-Par
Allen D. Malony, Helen D. Karatza, William J. Knottenbelt, Sally A. McKee
2011 J jnl
A clairvoyant site allocation policy based on service demands of jobs in a computational grid.
Simul. Model. Pract. Theory
Stylianos Zikos, Helen D. Karatza
2011 J jnl
Acquiring Knowledge in a Grid System via a Resource Discovery Scheme.
Int. J. Model. Simul. Sci. Comput.
Konstantinos I. Karaoglanoglou, Helen D. Karatza
2011 J jnl
AntP2PR: An ant intelligence inspired routing scheme for Peer-to-Peer networks.
Simul. Model. Pract. Theory
Fotis Loukos, Helen D. Karatza, Constandinos X. Mavromoustakis
2011 J jnl
Embedded Socio-oriented Model for End-to-End Reliable Stream Schedules by Using Collaborative Outsourcing in MP2P Systems.
Comput. J.
Constandinos X. Mavromoustakis, Helen D. Karatza
2011 J jnl
Gang scheduling in a two-cluster system implementing migrations and periodic feedback.
Simul.
Zafeirios C. Papazachos, Helen D. Karatza
2011 J jnl
Gang scheduling in multi-core clusters implementing migrations.
Future Gener. Comput. Syst.
Zafeirios C. Papazachos, Helen D. Karatza
2011 C conf
Performance and cost evaluation of Gang Scheduling in a Cloud Computing system with job migrations and starvation handling.
ISCC
Ioannis A. Moschakis, Helen D. Karatza
2011 J jnl
Performance and energy aware cluster-level scheduling of compute-intensive jobs with unknown service times.
Simul. Model. Pract. Theory
Stylianos Zikos, Helen D. Karatza
2011 J jnl
Resource discovery in a Grid system: Directing requests to trustworthy virtual organizations based on global trust values.
J. Syst. Softw.
Konstantinos I. Karaoglanoglou, Helen D. Karatza
2011 C conf
SPECT: A system for Peer-to-Peer economic transactions.
ISCC
Fotis Loukos, Helen D. Karatza
2011 J jnl
Scheduling multiple task graphs in heterogeneous distributed real-time systems by exploiting schedule holes with bin packing techniques.
Simul. Model. Pract. Theory
Georgios L. Stavrinides, Helen D. Karatza
2011 — conf
The Impact of Input Error on the Scheduling of Task Graphs with Imprecise Computations in Heterogeneous Distributed Real-Time Systems.
ASMTA
Georgios L. Stavrinides, Helen D. Karatza
2010 J jnl
A Gossip-Based Optimistic Replication for Efficient Delay-Sensitive Streaming Using an Interactive Middleware Support System.
IEEE Syst. J.
Constandinos X. Mavromoustakis, Helen D. Karatza
2010 J jnl
A Gossip-based optimistic replication for efficient delay-sensitive streaming using an interactive middleware support system
CoRR
Constandinos X. Mavromoustakis, Helen D. Karatza
2010 — conf
Clairvoyant site allocation of jobs with highly variable service demands in a computational grid.
IPDPS Workshops
Stylianos Zikos, Helen D. Karatza
2010 Misc conf
Job Scheduling in a Distributed System Using Backfilling with Inaccurate Runtime Computations.
CISIS
Sofia K. Dimitriadou, Helen D. Karatza
2010 J jnl
Performance evaluation of bag of gangs scheduling in a heterogeneous distributed system.
J. Syst. Softw.
Zafeirios C. Papazachos, Helen D. Karatza
2010 J jnl
Real-time performance evaluation of asynchronous time division traffic-aware and delay-tolerant scheme in
Int. J. Commun. Syst.
Constandinos X. Mavromoustakis, Helen D. Karatza
2010 J jnl
Scheduling multiple task graphs with end-to-end deadlines in distributed real-time systems utilizing imprecise computations.
J. Syst. Softw.
Georgios L. Stavrinides, Helen D. Karatza
2010 J jnl
Task cluster scheduling in a grid system.
Simul. Model. Pract. Theory
Kyriaki Gkoutioudi, Helen D. Karatza
2010 J jnl
The impact of service demand variability on resource allocation strategies in a grid system.
ACM Trans. Model. Comput. Simul.
Stylianos Zikos, Helen D. Karatza
2009 J jnl
Communication cost effective scheduling policies of nonclairvoyant jobs with load balancing in a grid.
J. Syst. Softw.
Stylianos Zikos, Helen D. Karatza
2009 — ch.
Enabling Cooperation in MANET-Based Peer-to-Peer Systems.
Mobile Peer-to-Peer Computing
Fotis Loukos, Helen D. Karatza
2009 — conf
Enabling high throughput for delay sensitive streams using epidemic replication in clustered MP2P devices.
MobiMedia
Constandinos X. Mavromoustakis, Helen D. Karatza
2009 J jnl
Fault-tolerant Gang Scheduling in Distributed Real-time Systems Utilizing Imprecise Computations.
Simul.
Georgios L. Stavrinides, Helen D. Karatza
2009 — conf
Introduction.
Euro-Par
Emmanuel Jeannot, Ramin Yahyapour, Daniel Grosu, Helen D. Karatza
2009 — conf
Multi-Site Allocation Policies on a Grid and Local Level.
PASM@MASCOTS
Sofia K. Dimitriadou, Helen D. Karatza
2009 A conf
Performance evaluation of a resource discovery scheme in a Grid environment prone to resource failures.
IPDPS
Konstantinos I. Karaoglanoglou, Helen D. Karatza
2009 A conf
Performance evaluation of gang scheduling in a two-cluster system with migrations.
IPDPS
Zafeirios C. Papazachos, Helen D. Karatza
2009 J jnl
Performance of gang scheduling strategies in a parallel system.
Simul. Model. Pract. Theory
Helen D. Karatza
2009 J jnl
Reputation based friend-to-friend networks.
Peer-to-Peer Netw. Appl.
Fotis Loukos, Helen D. Karatza
2009 — conf
Scheduling Gangs with Different Distributions in Gangs' Degree of Parallelism in a Multi-Site System.
BCI
Zafeirios C. Papazachos, Helen D. Karatza
2009 J jnl
The impact of task service time variability on gang scheduling performance in a two-cluster system.
Simul. Model. Pract. Theory
Zafeirios C. Papazachos, Helen D. Karatza
2008 J jnl
A two-class parallel system with general service times of the parallel class.
J. Comput. Syst. Sci.
Dimitrios Filippopoulos, Helen D. Karatza
2008 J jnl
An ontology-based collaborative service-oriented simulation framework with Microsoft Robotics Studio
Simul. Model. Pract. Theory
Wei-Tek Tsai, Xin Sun, Qian Huang, Helen D. Karatza
2008 — conf
End-to-end layered asynchronous scheduling scheme for energy aware QoS provision in asymmetrical wireless devices.
EDOCW
Constandinos X. Mavromoustakis, Helen D. Karatza
2008 — conf
Resource Allocation Strategies in a 2-Level Hierarchical Grid System.
Annual Simulation Symposium
Stylianos Zikos, Helen D. Karatza
2008 — conf
Resource Discovery in a Grid System Based on Matchmaking-Routers.
Panhellenic Conference on Informatics
Konstantinos I. Karaoglanoglou, Helen D. Karatza
2008 J jnl
Resource Discovery in a dynamical grid based on Re-routing Tables.
Simul. Model. Pract. Theory
Konstantinos I. Karaoglanoglou, Helen D. Karatza
2008 J jnl
The Impact of Critical Sporadic Jobs on Gang Scheduling Performance in Distributed Systems.
Simul.
Helen D. Karatza
2008 J jnl
Under storage constraints of epidemic backup node selection using HyMIS architecture for data replication in mobile peer-to-peer networks.
J. Syst. Softw.
Constandinos X. Mavromoustakis, Helen D. Karatza
2007 J jnl
An M/M/2 parallel system model with pure space sharing among rigid jobs.
Math. Comput. Model.
Dimitrios Filippopoulos, Helen D. Karatza
2007 B conf
An Optimal Adaptive Approach using Behavioral Promiscuous Caching and Storage-Capacity Characteristics for Energy Conservation in Asymmetrical Wireless Devices.
PIMRC
Constandinos X. Mavromoustakis, Helen D. Karatza
2007 J jnl
Dispersed information diffusion with level and schema-based coordination in mobile peer to peer networks.
Clust. Comput.
Constandinos X. Mavromoustakis, Helen D. Karatza
2007 J jnl
Dynamic non-preemptive re-allocation policies between two sites with reconfigurable servers.
Simul. Model. Pract. Theory
Dimitrios Filippopoulos, Helen D. Karatza
2007 — conf
Performance Measures of Stream-Oriented Power Consumption for Asymmetrical Communication in Wireless Ad-Hoc Networks.
Annual Simulation Symposium
Constandinos X. Mavromoustakis, Helen D. Karatza
2007 J jnl
Preface: New Challenges in Large-Scale Computer Systems and Network Modeling and Simulation.
Simul.
Helen D. Karatza
2007 J jnl
Quality of Service Measures of Mobile Ad-hoc Wireless Network using Energy Consumption Mitigation with Asynchronous Inactivity Periods.
Simul.
Constandinos X. Mavromoustakis, Helen D. Karatza
2006 — conf
A two-class parallel queue with pure space sharing among rigid jobs and general service times.
VALUETOOLS
Dimitrios Filippopoulos, Helen D. Karatza
2006 J jnl
Distributed Systems Simulation.
Simul. Model. Pract. Theory
Helen D. Karatza, Georgios K. Theodoropoulos
2006 J jnl
Guest Editorial: Recent Advances in Network Modeling and Simulation.
Simul.
Helen D. Karatza, Richard Fujimoto
2006 J jnl
Introduction to the Special Issue: On Internet and Wireless Network Performance.
Simul.
Helen D. Karatza
2006 C conf
Multi-site Scheduling with Multiple Job Reservations and Forecasting Methods.
ISPA
Maria A. Ioannidou, Helen D. Karatza
2006 J jnl
On the efficiency and performance evaluation of the bandwidth clustering scheme for adaptive and reliable resource allocation.
J. Syst. Softw.
Constandinos X. Mavromoustakis, Helen D. Karatza
2006 A conf
On the performance analysis of recursive data replication scheme for file sharing in mobile peer-to-peer devices using the HyMIS scheme.
IPDPS
Constandinos X. Mavromoustakis, Helen D. Karatza
2006 J jnl
Optimized QoS priority routing for service tunability and overhead reduction using swarm based active network scheme.
Comput. Commun.
Constandinos X. Mavromoustakis, Helen D. Karatza
2006 J jnl
Performance evaluation of an on demand tunable resource allocation apparatus using constrained active network.
Simul. Model. Pract. Theory
Constandinos X. Mavromoustakis, Helen D. Karatza
2006 — conf
Swarm-based Active Tunable Routing for Overhead Reduction in Multiservice Networks.
Annual Simulation Symposium
Constandinos X. Mavromoustakis, Helen D. Karatza
2005 J jnl
Adaptive traffic-based control method for energy conservation in wireless devices.
Simul. Model. Pract. Theory
Constandinos X. Mavromoustakis, Helen D. Karatza
2005 — conf
Bandwidth Clustering for Reliable and Prioritized Network Routing Using Split Agent-Based Method.
ICDCS Workshops
Constandinos X. Mavromoustakis, Helen D. Karatza
2005 — conf
Epidemic Collaborative Geocast for Reliable Segmented File Sharing in Mobile Peer-to-Peer Devices.
Panhellenic Conference on Informatics
Constandinos X. Mavromoustakis, Helen D. Karatza
2005 J jnl
Guest Editor's Introduction: Special Issue On Modeling and Simulation of Emerging Wireless and Sensor Network Technologies and Applications.
Simul.
Helen D. Karatza
2005 — conf
Handling Delay Sensitive Contents Using Adaptive Traffic-Based Control Method for Minimizing Energy Consumption in Wireless Devices.
Annual Simulation Symposium
Constandinos X. Mavromoustakis, Helen D. Karatza
2005 — conf
Reliable file sharing scheme for mobile peer-to-peer users using epidemic selective caching.
ICPS
Constandinos X. Mavromoustakis, Helen D. Karatza
2005 B conf
Segmented File Sharing with Recursive Epidemic Placement Policy for Reliability in Mobile Peer-to-Peer Devices.
MASCOTS
Constandinos X. Mavromoustakis, Helen D. Karatza
2004 J jnl
A Valuable Resource of Programmers Using .NET Technology.
IEEE Distributed Syst. Online
Helen D. Karatza
2004 — conf
Adaptive Energy Conservation Model using Dynamic Caching for Wireless Devices.
Annual Simulation Symposium
Constandinos X. Mavromoustakis, Helen D. Karatza
2004 J jnl
Agent-based throughput response in presence of node and/or link failure (on demand) for circuit switched telecommunication networks.
Comput. Commun.
Constandinos X. Mavromoustakis, Helen D. Karatza
2004 J jnl
An Excellent Resource for Parallel Computing.
IEEE Distributed Syst. Online
Helen D. Karatza
2004 — conf
An on Demand Path Marking and Capacity Reservation Method using Split Agent.
CLADE
Constandinos X. Mavromoustakis, Helen D. Karatza
2004 J jnl
Brute force web search for wireless devices using mobile agents.
J. Syst. Softw.
Konstantinos G. Zerfiridis, Helen D. Karatza
2004 J jnl
Computer systems.
J. Syst. Softw.
Helen D. Karatza
2004 J jnl
File distribution using a peer-to-peer network--a simulation study.
J. Syst. Softw.
Konstantinos G. Zerfiridis, Helen D. Karatza
2004 J jnl
Intelligent Software Agents' Influence on Media-Based Systems.
IEEE Distributed Syst. Online
Helen D. Karatza
2004 J jnl
Itinerary-Based Segmented Dissemination on a Peer-to-Peer Network.
Simul.
Konstantinos G. Zerfiridis, Helen D. Karatza
2004 J jnl
Modeling and simulation of distributed systems and networks.
Simul. Model. Pract. Theory
Helen D. Karatza
2004 — conf
Optimized Dissemination of Highly Anticipated Content over an Itinerary Based P2P Network.
Annual Simulation Symposium
Konstantinos G. Zerfiridis, Helen D. Karatza
2004 J jnl
Performance modeling and analysis of computer systems and networks.
J. Syst. Softw.
Helen D. Karatza
2004 J jnl
Preface to Special Issue on Modeling and Simulation Applications in Cluster and Grid Computing.
Simul.
Helen D. Karatza
2004 J jnl
Simulation study of multitasking in distributed server systems with variable workload.
Simul. Model. Pract. Theory
Helen D. Karatza
2004 J jnl
Split agent-based routing in interconnected networks.
Int. J. Commun. Syst.
Constandinos X. Mavromoustakis, Helen D. Karatza
2003 — conf
Dissemination Scenarios in Peer-to-Peer Networks.
Annual Simulation Symposium
Konstantinos G. Zerfiridis, Helen D. Karatza
2003 — conf
Fault Tolerant Peer-to-Peer Dissemination Network.
Euro-Par
Konstantinos G. Zerfiridis, Helen D. Karatza
2003 — conf
Gang Scheduling in a Distributed System under Processor Failures and Time-Varying Gang Size.
FTDCS
Helen D. Karatza
2003 B conf
Large Scale Dissemination Using a Peer-to-Peer Network.
CCGRID
Konstantinos G. Zerfiridis, Helen D. Karatza
2003 J jnl
Parallel Job Scheduling in Homogeneous Distributed Systems.
Simul.
Helen D. Karatza, Ralph C. Hilzer Jr.
2003 — conf
Performance Analysis of Parallel Job Scheduling in Distributed Systems.
Annual Simulation Symposium
Helen D. Karatza, Ralph C. Hilzer Jr.
2003 — conf
Scheduling in Distributed Systems.
MASCOTS Tutorials
Helen D. Karatza
2002 J jnl
A Simulation Study of Epoch Load Sharing in Distributed Systems.
Simul.
Helen D. Karatza, Ralph C. Hilzer Jr.
2002 J jnl
Book Review: An Owner's Manual for High Performance Computing (A review of Techniques for Optimizing Applications: High Performance Computing by Rajat P. Garg and Ilya Sharapov).
IEEE Distributed Syst. Online
Helen D. Karatza
2002 — conf
Gang Scheduling Performance on a Cluster of Non-Dedicated Workstations.
Annual Simulation Symposium
Helen D. Karatza
2002 J jnl
Mobile agents as a middleware for data dissemination.
Neural Parallel Sci. Comput.
Konstantinos G. Zerfiridis, Helen D. Karatza
2002 Misc conf
Parallel and distributed systems: load sharing in heterogeneous distributed systems.
WSC
Helen D. Karatza, Ralph C. Hilzer Jr.
2002 — conf
Scheduling Issues in a Partitionable Parallel System.
ESM
Helen D. Karatza
2002 — conf
Scheduling a Job Mix in a Partitionable Parallel System.
Annual Simulation Symposium
Helen D. Karatza, Ralph C. Hilzer Jr.
2002 J jnl
Task scheduling performance in distributed systems with time varying workload.
Neural Parallel Sci. Comput.
Helen D. Karatza
2001 — conf
Epoch Load Sharing in a Network of Workstations.
Annual Simulation Symposium
Helen D. Karatza, Ralph C. Hilzer Jr.
2001 J jnl
Gang Scheduling Performance under Different Distributions of Gang Size.
Parallel Distributed Comput. Pract.
Helen D. Karatza
2001 J jnl
Job scheduling in heterogeneous distributed systems.
J. Syst. Softw.
Helen D. Karatza
2001 J jnl
Modeling and Simulation Applications in Scheduling Multiprocessor Systems.
Simul.
Helen D. Karatza
2001 J jnl
Modeling and Simulation Applications in Scheduling Multiprocessor Systems.
Simul.
Helen D. Karatza
2001 J jnl
Modeling and Simulation Applications in Scheduling Multiprocessor Systems.
Simul.
Helen D. Karatza
2001 J jnl
Modeling and Simulation Applications in Scheduling Multiprocessor Systems.
Simul.
Helen D. Karatza
2001 J jnl
Modeling and Simulation Applications in Scheduling Multiprocessor Systems.
Simul.
Helen D. Karatza
2000 Misc conf
A simulation model of backfilling and I/O scheduling in a partitionable parallel system.
WSC
Helen D. Karatza
2000 J jnl
Book Review : Simulation with Visual SLAM and Awesim by A. Alan B. Pritsker and Jean J. O'Reilly.
Simul.
Helen D. Karatza
2000 J jnl
Cache affinity and resequencing in a shared-memory multiprocessing system.
J. Syst. Softw.
Helen D. Karatza
2000 J jnl
Modeling and Simulation Applications in Scheduling Multiprocessor Systems.
Simul.
Helen D. Karatza
2000 — conf
Scheduling Strategies for Multitasking in a Distributed System.
Annual Simulation Symposium
Helen D. Karatza
1999 — conf
A Simulation - Based Performance Analysis of Gang Scheduling in a Distributed System.
Annual Simulation Symposium
Helen D. Karatza
1999 — conf
A Simulation Model of Task Cluster Scheduling in Distributed Systems.
FTDCS
Helen D. Karatza
1998 — conf
Assignment of Programs in a Distributed System with Resequencing.
Annual Simulation Symposium
Helen D. Karatza
1998 J jnl
Task routing and resequencing in a multiprocessor system.
J. Syst. Softw.
Helen D. Karatza
1997 — conf
Performance Issues of Task Routing and Task Scheduling with Resequencing in Homogeneous Distributed Systems.
Annual Simulation Symposium
Anthony Karageorgos, Helen D. Karatza
1997 J jnl
Simulation Study of Task Scheduling and Resequencing in a Multiprocessing System.
Simul.
Helen D. Karatza
1996 Misc conf
Multitasking and resequencing in a two-stage multiprocessing system.
WSC
Helen D. Karatza
1995 — conf
Simulation Study of Multitasking and Resequencing in a Homogeneous Distributed System.
EUROSIM
Helen D. Karatza
1994 J jnl
Simulation study of a system with two processors linked in tandem.
J. Syst. Softw.
Helen D. Karatza
1993 J jnl
Book Reviews : Simulation Modeling and Analysis (2nd Edition) A.M.Law and W.D.Kelton McGraw-Hill.
Simul.
Helen D. Karatza
1987 J jnl
Simulation Study of Multitasking of Closed Computer System Networks.
Comput. Syst. Sci. Eng.
Helen D. Karatza
1986 J jnl
Simulation Study of Multitasking of Open Computer System Networks.
Comput. Syst. Sci. Eng.
Helen D. Karatza