Helen D. Karatza

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A simulation model of backfilling and I/O scheduling in a partitionable parallel system

Helen D. Karatza, H. Karatza, 2000, 2000 Winter Simulation Conference Proceedings (Cat. No.00CH37165).

Modeling and simulation of cloud computing and big data

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2019, Simul. Model. Pract. Theory.

Parallel and distributed systems: load sharing in heterogeneous distributed systems

Helen D. Karatza, Ralph C. Hilzer, 2002, WSC '02.

Two-server parallel system with pure space sharing and Markovian arrivals

Helen D. Karatza, S. R. Chakravarthy, H. Karatza, 2013, Comput. Oper. Res..

Bag-of-Tasks Load Balancing on Power-Aware Clusters

Helen D. Karatza, George Terzopoulos, 2016, 2016 24th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing (PDP).

Energy Efficiency in Large Scale Distributed Systems: The Role of Simulation

Helen D. Karatza, H. Karatza, 2017, ICPE Companion.

Simulation of parallel and distributed systems scheduling

Helen D. Karatza, 2003 .

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)

Helen D. Karatza, 2002, IEEE Distributed Syst. Online.

Reputation based friend-to-friend networks

Helen D. Karatza, Fotis Loukos, 2009, Peer Peer Netw. Appl..

Guest Editor’s Introduction: Special Issue On Modeling and Simulation of Emerging Wireless and Sensor Network Technologies and Applications

Helen D. Karatza, 2005, Simul..

Resource Discovery in a Grid System Based on Matchmaking-Routers

Helen D. Karatza, Konstantinos I. Karaoglanoglou, 2008, 2008 Panhellenic Conference on Informatics.

Bandwidth clustering for reliable and prioritized network routing using split agent-based method

Helen D. Karatza, Constandinos X. Mavromoustakis, 2005, 25th IEEE International Conference on Distributed Computing Systems Workshops.

Resource Discovery in Large‐Scale Grid Systems

Helen D. Karatza, Emmanuel Jeannot, Julius Žilinskas, 2014, HiPC 2014.

Fault-tolerant Gang Scheduling in Distributed Real-time Systems Utilizing Imprecise Computations

Helen D. Karatza, Georgios L. Stavrinides, 2009, Simul..

Message from the IWSC 2015 Workshop Organizers

Helen D. Karatza, Stephen S. Yau, Wei-Tek Tsai, 2015, COMPSAC Workshops.

Special Issue on Simulation-based Performance Evaluation of Infrastructures for the Internet of Things: Connectivity and resource considerations in the mobility Era

Helen D. Karatza, Constandinos X. Mavromoustakis, 2013, Simul. Model. Pract. Theory.

Multitasking and resequencing in a two-stage multiprocessing system

Helen D. Karatza, 1996, Winter Simulation Conference.

Intelligent software agents' influence on media-based systems

Helen D. Karatza, 2004, IEEE Distributed Systems Online.

Periodic scheduling of mixed workload in distributed systems

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2017, 2017 International Conference on Engineering, Technology and Innovation (ICE/ITMC).

Scheduling Different Types of Bag-of-Tasks Jobs in Distributed Systems

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2019, 2019 10th International Conference on Information and Communication Systems (ICICS).

Adaptive traffic-based control method for energy conservation in wireless devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2005, Simul. Model. Pract. Theory.

File distribution using a peer-to-peer network--a simulation study

Helen D. Karatza, Konstantinos G. Zerfiridis, 2004, J. Syst. Softw..

Introduction to the Special Issue: On Internet and Wireless Network Performance

Helen D. Karatza, 2006, Simul..

Under storage constraints of epidemic backup node selection using HyMIS architecture for data replication in mobile peer-to-peer networks

Helen D. Karatza, Constandinos X. Mavromoustakis, 2008, J. Syst. Softw..

Mobile agents as a middleware for data dissemination

Helen D. Karatza, Konstantinos G. Zerfiridis, 2002, Neural Parallel Sci. Comput..

The impact of resource heterogeneity on the timeliness of hard real-time complex jobs

Helen D. Karatza, Georgios L. Stavrinides, 2014, PETRA '14.

A simulation-based performance analysis of gang scheduling in a distributed system

Helen D. Karatza, 1999, Proceedings 32nd Annual Simulation Symposium.

A Gossip-Based Optimistic Replication for Efficient Delay-Sensitive Streaming Using an Interactive Middleware Support System

Helen D. Karatza, Constandinos X. Mavromoustakis, H. Karatza, 2010, IEEE Systems Journal.

"Modeling and simulation of fog computing"

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2020, Simul. Model. Pract. Theory.

Real-time performance evaluation of asynchronous time division traffic-aware and delay-tolerant scheme in ad hoc sensor networks

Helen D. Karatza, Constandinos X. Mavromoustakis, 2010 .

On the Extensibility Properties and Performance Measures of Circuit Switched Telecommunication Networks, Using Agent-Based Distributed Routing Algorithm

Helen D. Karatza, Constandinos X. Mavromoustakis, 2003 .

Cost-Effective Utilization of Complementary Cloud Resources for the Scheduling of Real-Time Workflow Applications in a Fog Environment

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2019, 2019 7th International Conference on Future Internet of Things and Cloud (FiCloud).

Trends from Nesus Project

Helen D. Karatza, Laurent Lefèvre, Georgios L. Stavrinides, 2015 .

Performance modeling and analysis of computer systems and networks

Helen D. Karatza, 2004, J. Syst. Softw..

Scheduling jobs with different characteristics in distributed systems

Helen D. Karatza, 2014, 2014 International Conference on Computer, Information and Telecommunication Systems (CITS).

Performance evaluation of cloud-based log file analysis with Apache Hadoop and Apache Spark

Helen D. Karatza, Ilias Mavridis, H. Karatza, 2017, J. Syst. Softw..

Performance and cost evaluation of Gang Scheduling in a Cloud Computing system with job migrations and starvation handling

Helen D. Karatza, Ioannis A. Moschakis, H. Karatza, 2011, 2011 IEEE Symposium on Computers and Communications (ISCC).

The impact of task service time variability on gang scheduling performance in a two-cluster system

Helen D. Karatza, Zafeirios C. Papazachos, H. Karatza, 2009, Simul. Model. Pract. Theory.

Job scheduling in heterogeneous distributed systems

Helen D. Karatza, 2001, J. Syst. Softw..

Simulation Study of Multitasking of Open Computer System Networks

Helen D. Karatza, H. Karatza, 1986, Comput. Syst. Sci. Eng..

Directing requests and acquiring knowledge in a large-scale Grid system

Helen D. Karatza, Konstantinos I. Karaoglanoglou, 2012, 2012 International Symposium on Performance Evaluation of Computer & Telecommunication Systems (SPECTS).

Adaptive energy conservation model using dynamic caching for wireless devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2004, 37th Annual Simulation Symposium, 2004. Proceedings..

Smart Cities and Internet of Things

Helen D. Karatza, 2017, Simul. Model. Pract. Theory.

Simulation of a MSIMD system with resequencing

Helen D. Karatza, 1994, Proceedings of the First International Conference on Massively Parallel Computing Systems (MPCS) The Challenges of General-Purpose and Special-Purpose Computing.

Handling delay sensitive contents using adaptive traffic-based control method for minimizing energy consumption in wireless devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2005, 38th Annual Simulation Symposium.

Multi-Criteria Job Scheduling in Grid Using an Accelerated Genetic Algorithm

Helen D. Karatza, Kyriaki Gkoutioudi, 2012, Journal of Grid Computing.

Keynote Address 1

Helen D. Karatza, 2007, 5th ACIS International Conference on Software Engineering Research, Management & Applications (SERA 2007).

Gang Scheduling Performance under Different Distributions of Gang Size

Helen D. Karatza, 2001, Scalable Comput. Pract. Exp..

Assignment of programs in a distributed system with resequencing

Helen D. Karatza, 1998, Proceedings 31st Annual Simulation Symposium.

Scheduling a Time-Varying Workload of Multiple Types of Jobs on Distributed Resources

Helen D. Karatza, Georgios L. Stavrinides, 2020, 2020 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS).

Clairvoyant site allocation of jobs with highly variable service demands in a computational grid

Helen D. Karatza, Stylianos Zikos, H. Karatza, 2010, 2010 IEEE International Symposium on Parallel & Distributed Processing, Workshops and Phd Forum (IPDPSW).

Modeling and Simulation Applications in Scheduling Multiprocessor Systems

Helen D. Karatza, 2001, Simul..

Modeling and Simulation Applications in Scheduling Multiprocessor Systems

Helen D. Karatza, 2001, Simul..

Combining containers and virtual machines to enhance isolation and extend functionality on cloud computing

Helen D. Karatza, Ilias Mavridis, H. Karatza, 2019, Future Gener. Comput. Syst..

Scheduling real-time parallel applications in SaaS clouds in the presence of transient software failures

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2016, 2016 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS).

Towards scheduling for Internet‐of‐Things applications on clouds: a simulated annealing approach

Helen D. Karatza, Ioannis A. Moschakis, H. Karatza, 2015, Concurr. Comput. Pract. Exp..

Scheduling multiple task graphs with end-to-end deadlines in distributed real-time systems utilizing imprecise computations

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2010, J. Syst. Softw..

High performance system based on Cloud and beyond: Jungle Computing

Helen D. Karatza, Dimitrios Tychalas, H. Karatza, 2017, J. Comput. Sci..

Segmented file sharing with recursive epidemic placement policy for reliability in mobile peer-to-peer devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2005, 13th IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems.

Computer systems

Helen D. Karatza, 2004, J. Syst. Softw..

Enterprise HPC on the Clouds

Helen D. Karatza, Ioannis A. Moschakis, H. Karatza, 2011 .

Simulation study of multitasking in distributed server systems with variable workload

Helen D. Karatza, 2004, Simul. Model. Pract. Theory.

Scheduling of frequently communicating tasks

Helen D. Karatza, Zafeirios C. Papazachos, 2012, Int. J. Commun. Syst..

AntP2PR: An ant intelligence inspired routing scheme for Peer-to-Peer networks

Helen D. Karatza, Constandinos X. Mavromoustakis, Fotis Loukos, 2011, Simul. Model. Pract. Theory.

Cloud vs Fog Computing - Scheduling Real-Time Applications

Helen D. Karatza, 2020, MECO.

Itinerary-Based Segmented Dissemination on a Peer-to-Peer Network

Helen D. Karatza, Konstantinos G. Zerfiridis, 2004, Simul..

Gang scheduling in multi-core clusters implementing migrations

Helen D. Karatza, Zafeirios C. Papazachos, H. Karatza, 2011, Future Gener. Comput. Syst..

An energy-efficient, QoS-aware and cost-effective scheduling approach for real-time workflow applications in cloud computing systems utilizing DVFS and approximate computations

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2019, Future Gener. Comput. Syst..

Scheduling techniques for complex workloads in distributed systems

Helen D. Karatza, Georgios L. Stavrinides, 2018, ICFNDS.

Scheduling Data-Intensive Workloads in Large-Scale Distributed Systems: Trends and Challenges

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2018, Modeling and Simulation in HPC and Cloud Systems.

Community Oriented Neighboring Feedback for Efficient End-to-End Delay-Sensitive MP2P Streaming via Temporal Relay-Based Replication

Helen D. Karatza, Constandinos X. Mavromoustakis, H. Karatza, 2011 .

Performance evaluation of a resource discovery scheme in a Grid environment prone to resource failures

Helen D. Karatza, Konstantinos I. Karaoglanoglou, 2009, 2009 IEEE International Symposium on Parallel & Distributed Processing.

Swarm-based active tunable routing for overhead reduction in multiservice networks

Helen D. Karatza, Constandinos X. Mavromoustakis, 2006, 39th Annual Simulation Symposium (ANSS'06).

Simulation study of a system with two processors linked in tandem

Helen D. Karatza, H. Karatza, 1994, J. Syst. Softw..

Performance of gang scheduling strategies in a parallel system

Helen D. Karatza, H. Karatza, 2009, Simul. Model. Pract. Theory.

Performance evaluation of a SaaS cloud under different levels of workload computational demand variability and tardiness bounds

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2019, Simul. Model. Pract. Theory.

Gang scheduling in a distributed system under processor failures and time-varying gang size

Helen D. Karatza, 2003, The Ninth IEEE Workshop on Future Trends of Distributed Computing Systems, 2003. FTDCS 2003. Proceedings..

Modeling and Simulation Applications in Scheduling Multiprocessor Systems

Helen D. Karatza, 2001, Simul..

An M/M/2 parallel system model with pure space sharing among rigid jobs

Helen D. Karatza, Dimitrios Filippopoulos, H. Karatza, 2007, Math. Comput. Model..

Split agent-based routing in interconnected networks

Helen D. Karatza, Constandinos X. Mavromoustakis, H. Karatza, 2004, Int. J. Commun. Syst..

End-to-end layered asynchronous scheduling scheme for energy aware QoS provision in asymmetrical wireless devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2008, 2008 12th Enterprise Distributed Object Computing Conference Workshops.

Parallel Job Scheduling in Homogeneous Distributed Systems

Helen D. Karatza, Ralph C. Hilzer, H. Karatza, 2003, Simul..

A clairvoyant site allocation policy based on service demands of jobs in a computational grid

Helen D. Karatza, Stylianos Zikos, H. Karatza, 2011, Simul. Model. Pract. Theory.

The impact of workload variability on the energy efficiency of large-scale heterogeneous distributed systems

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2018, Simul. Model. Pract. Theory.

Large scale dissemination using a peer-to-peer network

Helen D. Karatza, Konstantinos G. Zerfiridis, 2003, CCGrid 2003. 3rd IEEE/ACM International Symposium on Cluster Computing and the Grid, 2003. Proceedings..

Dynamic scheduling of bags-of-tasks with sensitive input data and end-to-end deadlines in a hybrid cloud

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2020, Multimedia Tools and Applications.

Exascale Machines Require New Programming Paradigms and Runtimes

Dana Petcu, Helen D. Karatza, Domenico Talia, 2015, Supercomput. Front. Innov..

Resource Allocation Strategies in a 2-Level Hierarchical Grid System

Helen D. Karatza, Stylianos Zikos, 2008, 41st Annual Simulation Symposium (anss-41 2008).

A Valuable Resource of Programmers Using .NET Technology

Helen D. Karatza, 2004, IEEE Distributed Systems Online.

Performance evaluation of an on demand tunable resource allocation apparatus using constrained active network

Helen D. Karatza, Constandinos X. Mavromoustakis, 2006, Simul. Model. Pract. Theory.

Cost‐aware cloud bursting in a fog‐cloud environment with real‐time workflow applications

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2020, Concurr. Comput. Pract. Exp..

Performance of Clouds - Issues and Research Directions

Helen D. Karatza, 2012, CLOSER.

Optimized QoS priority routing for service tunability and overhead reduction using swarm based active network scheme

Helen D. Karatza, Constandinos X. Mavromoustakis, 2006, Comput. Commun..

Performance and energy aware cluster-level scheduling of compute-intensive jobs with unknown service times

Helen D. Karatza, Stylianos Zikos, H. Karatza, 2011, Simul. Model. Pract. Theory.

Quality of Service Measures of Mobile Ad-hoc Wireless Network using Energy Consumption Mitigation with Asynchronous Inactivity Periods

Helen D. Karatza, Constandinos X. Mavromoustakis, 2007, Simul..

Performance evaluation and energy consumption of a real-time heterogeneous grid system using DVS and DPM

Helen D. Karatza, George Terzopoulos, H. Karatza, 2013, Simul. Model. Pract. Theory.

Performance evaluation of bag of gangs scheduling in a heterogeneous distributed system

Helen D. Karatza, Zafeirios C. Papazachos, H. Karatza, 2010, J. Syst. Softw..

7th international workshop on Performance Modeling, Evaluation, and Optimization of Ubiquitous Computing and Networked Systems (PMEO-UCNS'08)

Tarek El-Ghazawi, Azzedine Boukerche, Hamid Sarbazi-Azad, 2008, IEEE International Parallel and Distributed Processing Symposium.

Simulation study of a MSIMD computer system network

Helen D. Karatza, 1991 .

Scheduling Gangs with Different Distributions in Gangs' Degree of Parallelism in a Multi-Site System

Helen D. Karatza, Zafeirios C. Papazachos, 2009, 2009 Fourth Balkan Conference in Informatics.

Enabling high throughput for delay sensitive streams using epidemic replication in clustered MP2P devices

Helen D. Karatza, Constandinos X. Mavromoustakis, H. Karatza, 2009, MobiMedia.

A hybrid approach to scheduling real-time IoT workflows in fog and cloud environments

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2018, Multimedia Tools and Applications.

Modeling and simulation of distributed systems and networks

Helen D. Karatza, 2004, Simul. Model. Pract. Theory.

Modeling and Simulation Applications in Scheduling Multiprocessor Systems

Helen D. Karatza, 2000, Simul..

Resource discovery in a Grid system: Directing requests to trustworthy virtual organizations based on global trust values

Helen D. Karatza, Konstantinos I. Karaoglanoglou, H. Karatza, 2011, J. Syst. Softw..

Simulation of load balancing and multitasking in a homogeneous distributed system model

Helen D. Karatza, 1991 .

Gang scheduling in a two-cluster system implementing migrations and periodic feedback

Helen D. Karatza, Zafeirios C. Papazachos, 2011, Simul..

An Excellent Resource for Parallel Computing

Helen D. Karatza, 2004, IEEE Distributed Systems Online.

Performance evaluation of a real-time grid system using power-saving capable processors

Helen D. Karatza, George Terzopoulos, 2011, The Journal of Supercomputing.

An on demand path marking and capacity reservation method using split agent

Helen D. Karatza, Constandinos X. Mavromoustakis, 2004, Proceedings of the Second International Workshop on Challenges of Large Applications in Distributed Environments, 2004. CLADE 2004..

Book Reviews : Simulation Modeling and Analysis (2nd Edition) A.M.Law and W.D.Kelton McGraw-Hill

Helen D. Karatza, 1993, Simul..

Scheduling Issues in a Partitionable Parallel System

Helen D. Karatza, 2002, ESM.

Task scheduling performance in distributed systems with time varying workload

Helen D. Karatza, 2002, Neural Parallel Sci. Comput..

Power-aware Bag-of-Tasks scheduling on heterogeneous platforms

Helen D. Karatza, George Terzopoulos, 2016, Cluster Computing.

Preface: New Challenges in Large-Scale Computer Systems and Network Modeling and Simulation

Helen D. Karatza, 2007, Simul..

Simulation study of load balancing in a heterogeneous distributed system model

Helen D. Karatza, 1994 .

Dynamic non-preemptive re-allocation policies between two sites with reconfigurable servers

Helen D. Karatza, Dimitrios Filippopoulos, 2007, Simul. Model. Pract. Theory.

Acquiring Knowledge in a Grid System via a Resource Discovery Scheme

Helen D. Karatza, Konstantinos I. Karaoglanoglou, 2011, Int. J. Model. Simul. Sci. Comput..

The Impact of Input Error on the Scheduling of Task Graphs with Imprecise Computations in Heterogeneous Distributed Real-Time Systems

Helen D. Karatza, Georgios L. Stavrinides, 2011, ASMTA.

Task routing and resequencing in a multiprocessor system

Helen D. Karatza, 1998, J. Syst. Softw..

Scheduling Bag-of-Task-Chains in Distributed Systems

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2019, 2019 IEEE 14th International Symposium on Autonomous Decentralized System (ISADS).

Enabling Cooperation in MANET-Based Peer-to-Peer Systems

Helen D. Karatza, Fotis Loukos, 2009, Mobile Peer-to-Peer Computing.

Message from the PEN-PCGCS Workshop Co-chairs

Azzedine Boukerche, Hamid Sarbazi-Azad, Helen D. Karatza, 2006, ICPP Workshops.

Enabling high throughput for delay sensitive streams using epidemic replication in clustered MP2P devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2009, MobiMedia.

Performance issues of task routing and task scheduling with resequencing in homogeneous distributed systems

Helen D. Karatza, Anthony Karageorgos, 1997, Proceedings of 1997 SCS Simulation Multiconference.

A Cost-Effective and QoS-Aware Approach to Scheduling Real-Time Workflow Applications in PaaS and SaaS Clouds

Helen D. Karatza, Georgios L. Stavrinides, 2015, 2015 3rd International Conference on Future Internet of Things and Cloud.

On the efficiency and performance evaluation of the bandwidth clustering scheme for adaptive and reliable resource allocation

Helen D. Karatza, Constandinos X. Mavromoustakis, 2006, J. Syst. Softw..

Performance analysis of parallel job scheduling in distributed systems

Helen D. Karatza, Ralph C. Hilzer, H. Karatza, 2003, 36th Annual Simulation Symposium, 2003..

Embedded Socio-oriented Model for End-to-End Reliable Stream Schedules by Using Collaborative Outsourcing in MP2P Systems

Helen D. Karatza, Constandinos X. Mavromoustakis, 2011, Comput. J..

SPECT: A system for Peer-to-Peer economic transactions

Helen D. Karatza, Fotis Loukos, 2011, 2011 IEEE Symposium on Computers and Communications (ISCC).

The impact of checkpointing interval selection on the scheduling performance of real‐time fine‐grained parallel applications in SaaS clouds under various failure probabilities

Helen D. Karatza, Georgios L. Stavrinides, 2018, Concurr. Comput. Pract. Exp..

Task cluster scheduling in a grid system

Helen D. Karatza, Kyriaki Gkoutioudi, H. Karatza, 2010, Simul. Model. Pract. Theory.

Message from the Workshop Organizers The 12 th IEEE International Workshop on Software Cybernetics IWSC 2015

Helen D. Karatza, Stephen S. Yau, Xiaoying Bai, 2015 .

Multi-site Scheduling with Multiple Job Reservations and Forecasting Methods

Helen D. Karatza, Maria A. Ioannidou, 2006, ISPA.

Brute force web search for wireless devices using mobile agents

Helen D. Karatza, Konstantinos G. Zerfiridis, 2004, J. Syst. Softw..

Scheduling real-time DAGs in heterogeneous clusters by combining imprecise computations and bin packing techniques for the exploitation of schedule holes

Helen D. Karatza, Georgios L. Stavrinides, 2012, Future Gener. Comput. Syst..

Scheduling a job mix in a partitionable parallel system

Helen D. Karatza, Ralph C. Hilzer, 2002, Proceedings 35th Annual Simulation Symposium. SS 2002.

Gang scheduling with precedence constraints

Helen D. Karatza, Zafeirios C. Papazachos, 2010, Proceedings of the 2010 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS '10).

Guest Editorial: Recent Advances in Network Modeling and Simulation

Helen D. Karatza, Richard M. Fujimoto, 2006, Simul..

Optimized dissemination of highly anticipated content over an itinerary based P2P network

Helen D. Karatza, Konstantinos G. Zerfiridis, 2004, 37th Annual Simulation Symposium, 2004. Proceedings..

Scheduling multiple task graphs in heterogeneous distributed real-time systems by exploiting schedule holes with bin packing techniques

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2011, Simul. Model. Pract. Theory.

Special issue on "Techniques and applications for sustainable ultrascale computing systems"

Jesús Carretero, Helen D. Karatza, H. Karatza, 2015, Simul. Model. Pract. Theory.

Scheduling real‐time bag‐of‐tasks applications with approximate computations in SaaS clouds

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2020, Concurr. Comput. Pract. Exp..

Scheduling in Distributed Systems

Helen D. Karatza, 2003, MASCOTS Tutorials.

Orchestration of Real-Time Workflows with Varying Input Data Locality in a Heterogeneous Fog Environment

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2020, 2020 Fifth International Conference on Fog and Mobile Edge Computing (FMEC).

Energy-Aware Scheduling of Real-Time Workflow Applications in Clouds Utilizing DVFS and Approximate Computations

Helen D. Karatza, Georgios L. Stavrinides, 2018, 2018 IEEE 6th International Conference on Future Internet of Things and Cloud (FiCloud).

AN EXPERIMENTAL INVESTIGATION OF A MULTI-PROCESSOR SCHEDULING SYSTEM

Helen D. Karatza, Colin R. Reeves, 1997 .

Performance Measures of Stream-Oriented Power Consumption for Asymmetrical Communication in Wireless Ad-Hoc Networks

Helen D. Karatza, Constandinos X. Mavromoustakis, 2007, 40th Annual Simulation Symposium (ANSS'07).

Simulation and performance evaluation of a fog system

Helen D. Karatza, Dimitrios Tychalas, 2018, 2018 Third International Conference on Fog and Mobile Edge Computing (FMEC).

Gang scheduling in a two-cluster system with critical sporadic jobs and migrations

Helen D. Karatza, Zafeirios C. Papazachos, 2009, 2009 International Symposium on Performance Evaluation of Computer & Telecommunication Systems.

Simulation Study of Multitasking and Resequencing in a Homogeneous Distributed System

Helen D. Karatza, 1995, EUROSIM.

Epidemic Collaborative Geocast for Reliable Segmented File Sharing in Mobile Peer-to-Peer Devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2005, Panhellenic Conference on Informatics.

High-performance modelling and simulation for big data applications

Helen D. Karatza, Horacio González-Vélez, Joanna Kolodziej, 2017, Simul. Model. Pract. Theory.

Modeling and Simulation Applications in Scheduling Multiprocessor Systems

Helen D. Karatza, 2001, Simul..

Weighted Scheduling of Mixed Gang Jobs on Distributed Resources

Helen D. Karatza, Georgios L. Stavrinides, 2020, 2020 International Conference on Communications, Computing, Cybersecurity, and Informatics (CCCI).

Split agent-based routing in interconnected networks: Research Articles

Helen D. Karatza, Constandinos X. Mavromoustakis, 2004 .

Performance and Overhead Study of Containers Running on Top of Virtual Machines

Helen D. Karatza, Ilias Mavridis, H. Karatza, 2017, 2017 IEEE 19th Conference on Business Informatics (CBI).

Performance evaluation of gang scheduling in a two-cluster system with migrations

Helen D. Karatza, Zafeirios C. Papazachos, 2009, 2009 IEEE International Symposium on Parallel & Distributed Processing.

Bag-of-Task Scheduling on Power-Aware Clusters Using a DVFS-Based Mechanism

Helen D. Karatza, George Terzopoulos, H. Karatza, 2014, 2014 IEEE International Parallel & Distributed Processing Symposium Workshops.

Multi-Criteria Scheduling of Complex Workloads on Distributed Resources

Helen D. Karatza, Georgios L. Stavrinides, 2020, 2020 International Conference on Computer, Information and Telecommunication Systems (CITS).

An ontology-based collaborative service-oriented simulation framework with Microsoft Robotics Studio®

Qian Huang, Helen D. Karatza, Wei-Tek Tsai, 2008, Simul. Model. Pract. Theory.

A Simulation Study of Multi-criteria Scheduling in Grid Based on Genetic Algorithms

Helen D. Karatza, Kyriaki Gkoutioudi, H. Karatza, 2012, 2012 IEEE 10th International Symposium on Parallel and Distributed Processing with Applications.

Evaluation of gang scheduling performance and cost in a cloud computing system

Helen D. Karatza, Ioannis A. Moschakis, H. Karatza, 2010, The Journal of Supercomputing.

The impact of service demand variability on resource allocation strategies in a grid system

Helen D. Karatza, Stylianos Zikos, H. Karatza, 2010, TOMC.

Topic 2: Performance Prediction and Evaluation

Helen D. Karatza, Allen D. Malony, William J. Knottenbelt, 2012, Euro-Par.

A Scheduling Algorithm for a Fog Computing System with Bag-of-Tasks Jobs: Simulation and Performance Evaluation

Helen D. Karatza, Dimitrios Tychalas, H. Karatza, 2020, Simul. Model. Pract. Theory.

Scheduling a Job Mix of Bag-of-Tasks and Bag-of-Task-Chains on Distributed Resources

Helen D. Karatza, Georgios L. Stavrinides, 2020, 2020 11th International Conference on Information and Communication Systems (ICICS).

Trust Calculation and Management in P2P and Grid Systems

Helen D. Karatza, Karaoglanoglou Konstantinos, 2013 .

A Simulation Study of Epoch Load Sharing in Distributed Systems

Helen D. Karatza, Ralph C. Hilzer, 2002, Simul..

Scheduling bags of tasks and gangs in a distributed system

Helen D. Karatza, Zafeirios C. Papazachos, H. Karatza, 2015, 2015 International Conference on Computer, Information and Telecommunication Systems (CITS).

Advances on information and communication systems

Helen D. Karatza, Rehab Duwairi, 2016, Simul. Model. Pract. Theory.

A Simulation-Based Performance Analysis of Epoch Task Scheduling in Distributed Processors

Helen D. Karatza, 2006 .

A simulation model of task cluster scheduling in distributed systems

Helen D. Karatza, 1999, Proceedings 7th IEEE Workshop on Future Trends of Distributed Computing Systems.

A tier-based asynchronous scheduling scheme for delay constrained energy efficient connectivity in asymmetrical wireless devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2010, The Journal of Supercomputing.

Fault Tolerant Peer-to-Peer Dissemination Network

Helen D. Karatza, Konstantinos G. Zerfiridis, 2003, Euro-Par.

Dynamic Voltage Scaling Scheduling on Power-Aware Clusters under Power Constraints

Helen D. Karatza, George Terzopoulos, H. Karatza, 2013, 2013 IEEE/ACM 17th International Symposium on Distributed Simulation and Real Time Applications.

Simulation-Based Performance Evaluation of an Energy-Aware Heuristic for the Scheduling of HPC Applications in Large-Scale Distributed Systems

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2017, ICPE Companion.

A Simulation Model Of Multitasking In Parallel Processing

Helen D. Karatza, H. Karatza, 1987 .

Energy-efficient real-time heterogeneous cluster scheduling with node replacement due to failures

Helen D. Karatza, George Terzopoulos, 2013, The Journal of Supercomputing.

A cloud system for health care

Helen D. Karatza, Dimitris Tychalas, H. Karatza, 2015, Panhellenic Conference on Informatics.

Maximizing Performance and Energy Efficiency of a Real-Time Heterogeneous 2-Level Grid System Using DVS

Helen D. Karatza, George Terzopoulos, 2012, 2012 IEEE/ACM 16th International Symposium on Distributed Simulation and Real Time Applications.

Programming languages for data-Intensive HPC applications: A systematic mapping study

Helen D. Karatza, Peter Kilpatrick, Edgars Celms, 2020, Parallel Comput..

Gang scheduling performance on a cluster of non-dedicated workstations

Helen D. Karatza, 2002, Proceedings 35th Annual Simulation Symposium. SS 2002.

Cache affinity and resequencing in a shared-memory multiprocessing system

Helen D. Karatza, 2000, J. Syst. Softw..

Scheduling Different Types of Gang Jobs in Distributed Systems

Helen D. Karatza, Georgios L. Stavrinides, 2019, 2019 International Conference on Computer, Information and Telecommunication Systems (CITS).

Dissemination scenarios in peer-to-peer networks

Helen D. Karatza, Konstantinos G. Zerfiridis, 2003, 36th Annual Simulation Symposium, 2003..

PMAC-PDG'05 Reviewers

Azzedine Boukerche, Hamid Sarbazi-Azad, Helen D. Karatza, 2005, ICPADS.

Modeling and Simulation Applications in Scheduling Multiprocessor Systems

Helen D. Karatza, 2001, Simul..

The Effect of Workload Computational Demand Variability on the Performance of a SaaS Cloud with a Multi-tier SLA

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2017, 2017 IEEE 5th International Conference on Future Internet of Things and Cloud (FiCloud).

Allocating jobs of different priorities to a distributed system with heterogeneous resources

Helen D. Karatza, Stylianos Zikos, 2018, 2018 International Conference on Computer, Information and Telecommunication Systems (CITS).

Scheduling Single-Task Jobs along with Bag-of-Task-Chains in Distributed Systems

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2019, ICFNDS.

Dynamic Sequencing of A Multi-Processor System: A Genetic Algorithm Approach

Helen D. Karatza, Colin R. Reeves, C. Reeves, 1993 .

Parallel Job Scheduling on a Dynamic Cloud Model with Variable Workload and Active Balancing

Helen D. Karatza, Ioannis A. Moschakis, H. Karatza, 2012, 2012 16th Panhellenic Conference on Informatics.

A two-class parallel system with general service times of the parallel class

Helen D. Karatza, Dimitrios Filippopoulos, H. Karatza, 2008, J. Comput. Syst. Sci..

Simulation Study of Task Scheduling and Resequencing in a Multiprocessing System

Helen D. Karatza, 1997, Simul..

Epoch load sharing in a network of workstations

Helen D. Karatza, Ralph C. Hilzer, 2001, Proceedings. 34th Annual Simulation Symposium.

Job Scheduling in a Distributed System Using Backfilling with Inaccurate Runtime Computations

Helen D. Karatza, Sofia K. Dimitriadou, H. Karatza, 2010, 2010 International Conference on Complex, Intelligent and Software Intensive Systems.

Preface to Special Issue on Modeling and Simulation Applications in Cluster and Grid Computing

Helen D. Karatza, 2004, Simul..

Book Review : Simulation with Visual SLAM and Awesim by A. Alan B. Pritsker and Jean J. O'Reilly

Helen D. Karatza, H. Karatza, 2000, Simul..

A meta-heuristic optimization approach to the scheduling of bag-of-tasks applications on heterogeneous clouds with multi-level arrivals and critical jobs

Helen D. Karatza, Ioannis A. Moschakis, H. Karatza, 2015, Simul. Model. Pract. Theory.

Distributed Systems Simulation

Helen D. Karatza, Georgios K. Theodoropoulos, 2006, Simul. Model. Pract. Theory.

Performance Evaluation of Opportunistic Resource-Sharing Scheme Using Socially Oriented Outsourcing in Wireless Devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2013, Comput. J..

Job scheduling in a grid cluster

Helen D. Karatza, Kyriaki Skenteridou, H. Karatza, 2015, 2015 International Conference on Computer, Information and Telecommunication Systems (CITS).

Energy monitoring as an essential building block towards sustainable ultrascale systems

Helen D. Karatza, Francisco Almeida, Marcos Dias de Assunção, 2017, Sustain. Comput. Informatics Syst..

Reliable file sharing scheme for mobile peer-to-peer users using epidemic selective caching

Helen D. Karatza, Constandinos X. Mavromoustakis, 2005, ICPS '05. Proceedings. International Conference on Pervasive Services, 2005..

Periodic Task Cluster Scheduling in Distributed Systems

Helen D. Karatza, 2006 .

Task Group Scheduling in Distributed Systems

Helen D. Karatza, Georgios L. Stavrinides, 2018, 2018 International Conference on Computer, Information and Telecommunication Systems (CITS).

A two-class parallel queue with pure space sharing among rigid jobs and general service times

Helen D. Karatza, Dimitrios Filippopoulos, H. Karatza, 2006, valuetools '06.

Different aspects of workflow scheduling in large-scale distributed systems

Jesús Carretero, Francisco Javier García Blas, Helen D. Karatza, 2017, Simul. Model. Pract. Theory.

Agent-based throughput response in presence of node and/or link failure (on demand) for circuit switched telecommunication networks

Helen D. Karatza, Constandinos X. Mavromoustakis, 2004, Comput. Commun..

Multi-criteria scheduling of Bag-of-Tasks applications on heterogeneous interlinked clouds with simulated annealing

Helen D. Karatza, Ioannis A. Moschakis, H. Karatza, 2015, J. Syst. Softw..

The impact of data locality on the performance of a SaaS cloud with real-time data-intensive applications

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2017, 2017 IEEE/ACM 21st International Symposium on Distributed Simulation and Real Time Applications (DS-RT).

Resource Discovery in a dynamical grid based on Re-routing Tables

Helen D. Karatza, Konstantinos I. Karaoglanoglou, 2008, Simul. Model. Pract. Theory.

Real-time data dissemination in mobile peer-to-peer networks

Helen D. Karatza, Vana Kalogeraki, Fotis Loukos, 2014, J. Syst. Softw..

Special issue on energy efficiency in grids and clouds

Helen D. Karatza, 2013, Simul. Model. Pract. Theory.

An Optimal Adaptive Approach using Behavioral Promiscuous Caching and Storage-Capacity Characteristics for Energy Conservation in Asymmetrical Wireless Devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2007, 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications.

Communication cost effective scheduling policies of nonclairvoyant jobs with load balancing in a grid

Helen D. Karatza, Stylianos Zikos, H. Karatza, 2009, J. Syst. Softw..

Epidemic collaborative replication for maintaining file sharing reliability in mobile peer-to-peer devices

Helen D. Karatza, Constandinos X. Mavromoustakis, 2005 .

Load sharing in heterogeneous distributed systems

Helen D. Karatza, Ralph C. Hilzer, 2002, Proceedings of the Winter Simulation Conference.

On the performance analysis of recursive data replication scheme for file sharing in mobile peer-to-peer devices using the HyMIS scheme

Helen D. Karatza, Constandinos X. Mavromoustakis, 2006, Proceedings 20th IEEE International Parallel & Distributed Processing Symposium.

The Impact of Critical Sporadic Jobs on Gang Scheduling Performance in Distributed Systems

Helen D. Karatza, 2008, Simul..

Energy Efficiency for Ultrascale Systems: Challenges and Trends from Nesus Project

Helen D. Karatza, Laurent Lefèvre, Anne-Cécile Orgerie, 2015, Supercomput. Front. Innov..

Scheduling strategies for multitasking in a distributed system

Helen D. Karatza, 2000, Proceedings 33rd Annual Simulation Symposium (SS 2000).

BANDWIDTH MANAGEMENT IN A CENTRALIZED LARGE SCALE DISSEMINATION NETWORK - A SIMULATION STUDY

Helen D. Karatza, Konstantinos G. Zerfiridis, 2003 .

Dispersed information diffusion with level and schema-based coordination in mobile peer to peer networks

Helen D. Karatza, Constandinos X. Mavromoustakis, 2007, Cluster Computing.

Multi-Site Allocation Policies on a Grid and Local Level

Helen D. Karatza, Sofia K. Dimitriadou, 2010, Electron. Notes Theor. Comput. Sci..

Fault-Tolerant Orchestration of Bags-of-Tasks with Application-Directed Checkpointing in a Distributed Environment

Helen D. Karatza, Georgios L. Stavrinides, 2021, 2021 International Conference on Communications, Computing, Cybersecurity, and Informatics (CCCI).

Guest editors' introduction: "Modeling and simulation of hybrid clouds"

Helen D. Karatza, Georgios L. Stavrinides, 2021, Simul. Model. Pract. Theory.

Resource Assignment Strategies for Bags-of-Tasks in Distributed Systems

Helen D. Karatza, Georgios L. Stavrinides, 2021, 2021 International Conference on Computer, Information and Telecommunication Systems (CITS).

Orchestrating Bag-of-Tasks Applications with Dynamically Spawned Tasks in a Distributed Environment

Helen D. Karatza, Georgios L. Stavrinides, 2021, 2021 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS).

Guest Editors' Introduction "Modeling and Simulation for Intelligent Distributed Computing"

Helen D. Karatza, Igor V. Kotenko, 2021, Simul. Model. Pract. Theory.

SaMW: a probabilistic meta-heuristic algorithm for job scheduling in heterogeneous distributed systems powered by microservices

Helen D. Karatza, Dimitrios Tychalas, 2021, Clust. Comput..

Multicriteria scheduling of linear workflows with dynamically varying structure on distributed platforms

Helen D. Karatza, Georgios L. Stavrinides, 2021, Simul. Model. Pract. Theory.

Security and Cost Aware Scheduling of Real-Time IoT Workflows in a Mist Computing Environment

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2021, 2021 8th International Conference on Future Internet of Things and Cloud (FiCloud).

Orchestrating real-time IoT workflows in a fog computing environment utilizing partial computations with end-to-end error propagation

Helen D. Karatza, Georgios L. Stavrinides, H. Karatza, 2021, Cluster Computing.

PERFORMANCE ANALYSIS OF GANG SCHEDULING IN A PARTITIONABLE PARALLEL SYSTEM

Helen D. Karatza, H. Karatza, 2006 .