Data cube modelling and OLAP algebra for hospital length of stay analysis

Concept Drift Complexity for Assessing Sampling-Induced Concept Drift in Class-Imbalanced Data Streams
Hajmohammed, M., Chountas, Panagiotis and Chaussalet, Thierry J. 2024. Concept Drift Complexity for Assessing Sampling-Induced Concept Drift in Class-Imbalanced Data Streams. 2024 IEEE 12th International Conference on Intelligent Systems (IS). Varna, Bulgaria 29 - 31 Aug 2024 IEEE . pp. 1-5 https://doi.org/10.1109/is61756.2024.10705246

A Concept Drift Based Approach To Evaluating Model Performance And Theoretical Lifespan
Hajmohammed, Mustafa, Chountas, Panagiotis and Chaussalet, Thierry J. 2024. A Concept Drift Based Approach To Evaluating Model Performance And Theoretical Lifespan. IEEE 14th International Conference on Pattern Recognition Systems (ICPRS). London, United Kingdom 15 - 18 Jul 2024 IEEE . pp. 1-6 https://doi.org/10.1109/icprs62101.2024.10677806

Fuzzy Fractional Brownian Motion: Review and Extension
Georgy Urumov, Panagiotis Chountas and Thierry Chaussalet 2024. Fuzzy Fractional Brownian Motion: Review and Extension. Algorithms. 17 (7) 289. https://doi.org/10.3390/a17070289

On OWA, Machine Learning and Big Data: The case for IFS over universes
Panagiotis Chountas, Mustafa Hajmohammed and Ismael Rhemat 2024. On OWA, Machine Learning and Big Data: The case for IFS over universes. Notes on Intuitionistic Fuzzy Sets. 30 (2), pp. 113-120. https://doi.org/10.7546/nifs.2024.30.2.113-120

From Data Quality to Predictive Big Data Quality
Rhemat, I., Chountas, P. and Roubert, F. 2024. From Data Quality to Predictive Big Data Quality. 12th IEEE International Conference on Intelligent Systems - IS'24. Varna, Bulgaria 31 Jul - 29 Aug 2024 IEEE .

Preprint: Fuzzy Fractional Brownian Motion: Review and Extension
Georgy Urumov, Panagiotis Chountas and Thierry Chaussalet 2024. Preprint: Fuzzy Fractional Brownian Motion: Review and Extension. Preprints.org. https://doi.org/10.20944/preprints202405.2078.v1

Business Process Data Oriented Quality: the case of Mellitah Oil & Gas
Rhemat, I., Chountas, P. and Roubert, F. 2024. Business Process Data Oriented Quality: the case of Mellitah Oil & Gas. 5th International Conference on Data Analytics & Management (ICDAM-2024). London Metropolitan University, London, UK 14 - 15 Jun 2024 Springer.

Essay on Volatility Clusters and Time Series Prediction
Urumov, G. and Chountas, P. 2022. Essay on Volatility Clusters and Time Series Prediction. 2022 IEEE 11th International Conference on Intelligent Systems (IS). Warsaw, Poland 12 - 14 Oct 2022 IEEE . https://doi.org/10.1109/is57118.2022.10019619

Clustering stock price volatility using intuitionistic fuzzy sets
Urumov, G. and Chountas, P. 2022. Clustering stock price volatility using intuitionistic fuzzy sets . Notes on Intuitionistic Fuzzy Sets. 28 (3), pp. 343-352. https://doi.org/10.7546/nifs.2022.28.3.343-352

Intercriteria Analysis and Arithmetic Functions
Atanassov, K.T., Atanassova, V. and Chountas, P. 2019. Intercriteria Analysis and Arithmetic Functions. in: Hadjiski, M. and Atanassov, K.T. (ed.) Intuitionistic Fuzziness and Other Intelligent Theories and Their Applications Springer. pp. 1-11

Generalized Net Model of Muscle Pain Diagnosing
Ribagin, S., Chountas, P. and Pencheva, T. 2017. Generalized Net Model of Muscle Pain Diagnosing. Christiansen, H., Jaudoin, H., Chountas, P., Andreasen, T. and Legind Larsen, H. (ed.) 12th International Conference, FQAS 2017. London, UK 21 - 22 Jun 2017 Springer. https://doi.org/10.1007/978-3-319-59692-1_24

Application of Topological Operators over Data from InterCriteria Analysis
Roeva, O., Vassilev, P. and Chountas, P. 2017. Application of Topological Operators over Data from InterCriteria Analysis. Christiansen, H., Jaudoin, H., Chountas, P., Andreasen, T. and Legind Larsen, H. (ed.) 12th International Conference, FQAS 2017. London, UK 21 - 22 Jun 2017 Springer. https://doi.org/10.1007/978-3-319-59692-1_19

Intercriteria analysis over normalized data
Atanassov, K.T., Atanassova, V., Chountas, P., Mitkova, M., Sotirova, E., Sotirov, S. and Stratiev, D. 2016. Intercriteria analysis over normalized data. Yager, R., Sgurev, V., Hadjiski, M. and Jotsov, V. (ed.) 2016 IEEE 8th International Conference on Intelligent Systems. Sofia, Bulgaria 04 - 06 Sep 2016 IEEE . https://doi.org/10.1109/IS.2016.7737480

Generalized Net Model of an Expert System Dealing with Temporal Hypothesis
Chountas, P., Atanassov, K.T., Sotirova, E. and Bureva, V. 2015. Generalized Net Model of an Expert System Dealing with Temporal Hypothesis. Andreasen, T., Christiansen, H., Kacprzyk, J., Larsen, H., Pasi, G., Pivert, O., De Tré, G., Vila, M.A., Yazici, A. and Zadrozny, S. (ed.) 11th International Conference FQAS 2015. Cracow, Poland 26 - 28 Oct 2015 Springer. https://doi.org/10.1007/978-3-319-26154-6_36

Generalized Net of the Process of Sequential Pattern Mining by Generalized Sequential Pattern Algorithm (GSP)
Bureva, V., Sotirova, E. and Chountas, P. 2014. Generalized Net of the Process of Sequential Pattern Mining by Generalized Sequential Pattern Algorithm (GSP). Filev, D., Jabłkowski, J., Kacprzyk, J., Krawczak, M., Popchev, I., Rutkowski, L., Sgurev, V., Sotirova, E., Szynkarczyk, P. and Zadrozny, S. (ed.) 7th IEEE International Conference Intelligent Systems IS’2014. Warsaw, Poland 24 - 26 Sep 2014 Springer. https://doi.org/10.1007/978-3-319-11310-4_72

Arc-Based Soft XML Pattern Matching
Alzebdi, M., Chountas, P. and Atanassov, K.T. 2013. Arc-Based Soft XML Pattern Matching. Larsen, H.L., Martin-Bautista, M.J., Amparo Vila, M., Andreasen, T. and Christiansen, H. (ed.) 10th International Conference on Flexible Query Answering Systems, FQAS 2013. Granada, Spain 18 - 20 Sep 2013 Springer. https://doi.org/10.1007/978-3-642-40769-7_28

Approximate XML query matching and rewriting using Intuitionistic Fuzzy Trees
Alzebdi, M., Chountas, P. and Atanassov, K.T. 2012. Approximate XML query matching and rewriting using Intuitionistic Fuzzy Trees. 6th IEEE International Conference on Intelligent Systems (IS). Sofia, Bulgaria 06 - 08 Sep 2012 IEEE . https://doi.org/10.1109/IS.2012.6335216

Intelligent analysis of acute bed overflow in a tertiary hospital in Singapore
Teow, K.L., El-Darzi, E., Foo, C., Jin, X. and Sim, J. 2012. Intelligent analysis of acute bed overflow in a tertiary hospital in Singapore. Journal of Medical Systems. 36 (3), pp. 1873-1882. https://doi.org/10.1007/s10916-010-9646-1

The notion of H-IFS: an approach for enhancing the OLAP capabilities in oracle10g
Chountas, P., Rogova, E. and Atanassov, K.T. 2011. The notion of H-IFS: an approach for enhancing the OLAP capabilities in oracle10g. International Journal of Intelligent Systems. 26 (3), pp. 262-283. https://doi.org/10.1002/int.20466

Intuitionistic fuzzy XML query matching
Chountas, P., Alzebdi, M. and Atanassov, K. 2011. Intuitionistic fuzzy XML query matching. 9th International Conference, FQAS 2011. Ghent, Belgium 26 Oct 2011 Springer. https://doi.org/10.1007/978-3-642-24764-4_27

A generalized net with an ACO-algorithm optimization component
Chountas, P., Atanassova, V., Fidanova, S. and Atanassov, K.T. 2011. A generalized net with an ACO-algorithm optimization component. 8th International Conference, LSSC 2011. Sozopol, Bulgaria 06 Jun 2011 Springer. https://doi.org/10.1007/978-3-642-29843-1_21

Data warehousing based architecture for the reporting of the NHS primary care prescribing
Redzanovic, S., Chountas, P., Chaussalet, T.J., Fouladinejad, F., Tadjer, M. and Fouladinajed, F. 2011. Data warehousing based architecture for the reporting of the NHS primary care prescribing. in: Olive, M. and Solomonides, T. (ed.) Proceedings of CMBS: the 24th International Symposium on Computer-Based Medical Systems, June 27th – 30th, 2011, Bristol, United Kingdom IEEE .

Temporal conflict in workflow schemas
Chountas, P. and Petrounias, I. 2011. Temporal conflict in workflow schemas. Journal of Computational Methods in Sciences and Engineering. 11 (4), pp. 193-207. https://doi.org/10.3233/JCM-2011-0365

An IFTr approach to approximate XML query matching
Alzebdi, M., Chountas, P. and Atanassov, K.T. 2011. An IFTr approach to approximate XML query matching. in: 2011 IEEE International Conference on Systems, Man, and Cybernetics (SMC) IEEE . pp. 2425-2430

Editorial: IMA Health 2010
Vasilakis, C., Chaussalet, T.J. and Baker, R.D. 2011. Editorial: IMA Health 2010. Health Care Management Science. 14 (3), pp. 213-214. https://doi.org/10.1007/s10729-011-9174-7

A statistical framework for evaluating neural networks to predict recurrent events in breast cancer
Gorunescu, F., Gorunescu, M., El-Darzi, E. and Gorunescu, S. 2010. A statistical framework for evaluating neural networks to predict recurrent events in breast cancer. International Journal of General Systems. 39 (5), pp. 471-488. https://doi.org/10.1080/03081079.2010.484282

Patient grouping optimization using a hybrid self-organizing map and Gaussian mixture model for length of stay-based clustering system
Gorunescu, F., Belciug, S., El-Darzi, E. and Gorunescu, M. 2010. Patient grouping optimization using a hybrid self-organizing map and Gaussian mixture model for length of stay-based clustering system. in: 5th IEEE International Conference on Intelligent Systems (IS 2010) proceedings IEEE . pp. 173-178

Evaluating alternative surgery plans with discrete-event simulation model
Fei, H., Meskins, N. and El-Darzi, E. 2010. Evaluating alternative surgery plans with discrete-event simulation model. in: 2010 IEEE Workshop on Health Care Management (WHCM), Italy, 18-20 February 2010 IEEE . pp. 1-6

Expressing hierarchical preferences in OLAP queries
Chountas, P., Rogova, E. and Atanassov, K.T. 2010. Expressing hierarchical preferences in OLAP queries. in: Kacprzyk, J., Petry, F.E. and Yazici, A. (ed.) Uncertainty approaches for spatial data modeling and processing Berlin Heidelberg Springer.

A partially connected neural network-based approach with application to breast cancer detection and recurrence
Belciug, S. and El-Darzi, E. 2010. A partially connected neural network-based approach with application to breast cancer detection and recurrence. in: 5th IEEE International Conference on Intelligent Systems (IS 2010) proceedings IEEE . pp. 191-196

Enhancing DWH models with the utilisation of multiple hierarchical schemata
Alzebdi, M., Chountas, P. and Atanassov, K.T. 2010. Enhancing DWH models with the utilisation of multiple hierarchical schemata. in: Proceeding of the 2010 IEEE International Conference on Systems Man and Cybernetics (SMC), Istanbul, 10-13 Oct. 2010 IEEE . pp. 488-492

Support vector machine learning with an evolutionary engine
Stoean, R., Preuss, M., Stoean, C., El-Darzi, E. and Dumitrescu, D. 2009. Support vector machine learning with an evolutionary engine. Journal of the Operational Research Society. 60 (8), pp. 1116-1122. https://doi.org/10.1057/jors.2008.124

An evolutionary approximation for the coefficients of decision functions within a support vector machine learning strategy
Stoean, R., Preuss, M., Stoean, C., El-Darzi, E. and Dumitrescu, D. 2009. An evolutionary approximation for the coefficients of decision functions within a support vector machine learning strategy. in: Abraham, A., Hassanien, A.E., Patrick, S. and Andries, E. (ed.) Foundations of computational intelligence Berlin Heidelberg Springer.

An evolutionary approximation for the coefficients of decision functions within a support vector machine learning strategy
Stoean, R., Preuss, M., Stoean, C., El-Darzi, E. and Dumitrescu, D. 2009. An evolutionary approximation for the coefficients of decision functions within a support vector machine learning strategy. in: Hassanien, A.E., Abraham, A., Vasilakos, A.V. and Pedrycz, W. (ed.) Foundations of computational intelligence Berlin Heidelberg Springer.

Using Granular Computing theories for service-oriented systems analysis and design
Huang, W. and El-Darzi, E. 2009. Using Granular Computing theories for service-oriented systems analysis and design. in: IEEE International Conference on Granular Computing (GrC 2009), Nanchang, China, August 17-19, 2009 IEEE . pp. 264-267

Clustering patient length of stay using mixtures of Gaussian models and phase type distributions
Garg, L., McClean, S.I., Meenan, B., El-Darzi, E. and Millard, P.H. 2009. Clustering patient length of stay using mixtures of Gaussian models and phase type distributions. in: Proceedings of the 22nd IEEE International Symposium on Computer-Based Medical Systems (CBMS 2009) IEEE . pp. 1-7

Performance analysis of ambulatory services using dicrete event simulation
Fei, H., Meskins, N. and El-Darzi, E. 2009. Performance analysis of ambulatory services using dicrete event simulation. in: Proceedings of the International Conference on Industrial Engineering and Systems Management (IESM' 2009), May 13-15, Montreal, Canada WASET.

Length of stay-based clustering methods for patient grouping
El-Darzi, E., Abbi, R., Vasilakis, C., Gorunescu, F., Gorunescu, M. and Millard, P.H. 2009. Length of stay-based clustering methods for patient grouping. in: McClean, S.I., Millard, P.H., El-Darzi, E. and Nugent, C. (ed.) Intelligent patient management Berlin Heidelberg Springer.

Enhancing OLAP querying with the aid of H-IFS
Chountas, P., Rogova, E. and Atanassov, K.T. 2009. Enhancing OLAP querying with the aid of H-IFS. International Fuzzy Systems Association World Congress and 2009 European Society of Fuzzy Logic and Technology Conference. Lisbon, Portugal 20th - 24th July 2009 pp. 1797-1802

A decision support system for measuring and modelling the multi-phase nature of patient flow in hospitals
Vasilakis, C., El-Darzi, E. and Chountas, P. 2008. A decision support system for measuring and modelling the multi-phase nature of patient flow in hospitals. in: Chountas, P., Petrounias, I. and Kacprzyk, J. (ed.) Intelligent techniques and tools for novel system architectures Berlin Heidelberg Springer.

The notion of H-IFS in data modelling
Rogova, E., Chountas, P. and Atanassov, K.T. 2008. The notion of H-IFS in data modelling. in: IEEE International Conference on Fuzzy Systems (FUZZ-IEEE 2008) (IEEE World Congress on Computational Intelligence) IEEE . pp. 1399-1405

Representation of value imperfection with the aid of background knowledge: H-IFS
Kolev, B., Chountas, P., Rogova, E. and Atanassov, K.T. 2008. Representation of value imperfection with the aid of background knowledge: H-IFS. in: Chountas, P., Petrounias, I. and Kacprzyk, J. (ed.) Intelligent techniques and tools for novel system architectures Springer.

A statistical evaluation of neural computing approaches to predict recurrent events in breast cancer
Gorunescu, F., Gorunescu, M., El-Darzi, E. and Gorunescu, S. 2008. A statistical evaluation of neural computing approaches to predict recurrent events in breast cancer. in: Proceedings of the 4th International IEEE Conference on Intelligent Systems IS'08. Varna, Bulgaria, September, 6-8 2008 Los Alamitos, USA IEEE .

The notion of H-IFS -an approach for enhancing query capabilities in Oracle10g
Chountas, P., Rogova, E., Mohammed, S. and Atanassov, K.T. 2008. The notion of H-IFS -an approach for enhancing query capabilities in Oracle10g. in: Proceedings of the 4th International IEEE Conference on Intelligent Systems IS'08. Varna, Bulgaria, September, 6-8 2008 Los Alamitos, USA IEEE . pp. 569-574

Length of stay based grouping and classification methodology for modelling patient flow
Abbi, R., El-Darzi, E., Vasilakis, C. and Millard, P.H. 2008. Length of stay based grouping and classification methodology for modelling patient flow. Journal of Operations and Logisitics. 2 (2), pp. 1-9.

A Gaussian mixture model approach to grouping patients according to their hospital length of stay
Abbi, R., El-Darzi, E., Vasilakis, C. and Millard, P.H. 2008. A Gaussian mixture model approach to grouping patients according to their hospital length of stay. in: Proceedings of the 21st IEEE International Symposium on Computer-Based Medical Systems (CBMS '08) IEEE . pp. 524-529

Analysis of stopping criteria for the EM algorithm in the context of patient grouping according to length of stay
Abbi, R., El-Darzi, E., Vasilakis, C. and Millard, P.H. 2008. Analysis of stopping criteria for the EM algorithm in the context of patient grouping according to length of stay. in: Proceedings of the 4th International IEEE Conference on Intelligent Systems IS'08. Varna, Bulgaria, September, 6-8 2008 Los Alamitos, USA IEEE .

Applying data mining algorithms to inpatient dataset with missing values
Liu, P., El-Darzi, E., Lei, L., Vasilakis, C., Chountas, P. and Huang, W. 2008. Applying data mining algorithms to inpatient dataset with missing values. Journal of Enterprise Information Management. 21 (1), pp. 81-92. https://doi.org/10.1108/17410390810842273

A simulation study of scheduling clinic appointments in surgical care: individual surgeon versus pooled lists
Vasilakis, C., Sobolev, B.G., Kuramoto, L. and Levy, A.R. 2007. A simulation study of scheduling clinic appointments in surgical care: individual surgeon versus pooled lists. Journal of the Operational Research Society. 58 (2), pp. 202-211. https://doi.org/10.1057/palgrave.jors.2602235

Generalized Net Model for Outpatient Care in Bulgaria
Tasseva, V., Peneva, D., Atanassov, K.T., El-Darzi, E., Chountas, P. and Vasilakis, C. 2007. Generalized Net Model for Outpatient Care in Bulgaria. in: Proc of Twentieth IEEE International Symposium on Computer-Based Medical Systems, 2007. CBMS '07. IEEE . pp. 701

Flexible hierarchies and fuzzy knowledge-based OLAP
Rogova, E., Chountas, P. and Atanassov, K.T. 2007. Flexible hierarchies and fuzzy knowledge-based OLAP. in: Proc. of Fourth International Conference on Fuzzy Systems and Knowledge Discovery, 2007. FSKD 2007. IEEE . pp. 7-11

On imprecision intuitionistic fuzzy sets & OLAP - the case for KNOLAP
Rogova, E. and Chountas, P. 2007. On imprecision intuitionistic fuzzy sets & OLAP - the case for KNOLAP. in: Castillo, O., Patricia Melin, B., Pedryczev, W. and Kacprzyk, J. (ed.) Theoretical Advances and Applications of Fuzzy Logic and Soft Computing Berlin and Heidelberg GmbH & Co. KG Springer. pp. 11-22

Extending the gaia methodology for the design and development of agent-based software systems
Huang, W., El-Darzi, E. and Jin, L. 2007. Extending the gaia methodology for the design and development of agent-based software systems. in: Proceedings of the 31st Annual IEEE International Computer Software and Applications Conference (COMPSAC 2007), Peking (Beijing), China, July 23-27 2007 Los Alamitos, USA IEEE .

An OLAP-enabled software environment for modelling patient flow
Vasilakis, C., El-Darzi, E. and Chountas, P. 2006. An OLAP-enabled software environment for modelling patient flow. in: Proceedings of the 3rd International IEEE Conference on Intelligent Systems Los Alamitos, USA IEEE . pp. 261-266

Healthcare data mining: predicting inpatient length of stay
Liu, P., Lei, L., Yin, J., Zhang, W., Naijun, W. and El-Darzi, E. 2006. Healthcare data mining: predicting inpatient length of stay. in: Proceedings of the 3rd International IEEE Conference on Intelligent Systems Los Alamitos, USA IEEE . pp. 832-837

Agent-based models for community care systems analysis and design
Huang, W., El-Darzi, E., Chountas, P. and Liu, P. 2006. Agent-based models for community care systems analysis and design. in: Proceedings of the 3rd IEEE International Conference on Intelligent Systems (IS-2006) Los Alamitos, USA IEEE . pp. 278-283

Generalized net model of an expert system with temporal components
Atanassov, K.T., Chountas, P., Kolev, B. and Sotirova, E. 2006. Generalized net model of an expert system with temporal components. Advanced Studies in Contemporary Mathematics. 12 (2), pp. 255-289.

Comparing two methods of scheduling outpatient clinic appointments using simulation experiments
Vasilakis, C. and Kuramoto, L. 2005. Comparing two methods of scheduling outpatient clinic appointments using simulation experiments. Clinical and Investigative Medicine. 28 (6), pp. 368-370.

Length of stay-based patient flow models: recent developments and future directions
Marshall, A.H., Vasilakis, C. and El-Darzi, E. 2005. Length of stay-based patient flow models: recent developments and future directions. Health Care Management Science. 8 (3), pp. 213-220. https://doi.org/10.1007/s10729-005-2012-z

Modelling nationwide hospital length of stay: opening the black box
Vasilakis, C. and Marshall, A.H. 2005. Modelling nationwide hospital length of stay: opening the black box. Journal of the Operational Research Society. 56 (7), pp. 862-869. https://doi.org/10.1057/palgrave.jors.2601872

Generalized net model with intuitionistic fuzzy estimations of the process of obtaining of scientific titles and degrees
Shannon, A., Riecan, B., Langova-Orozova, D., El-Darzi, E., Kerre, E., Sotirova, E., Gorunescu, F., Petrounias, I., Trelewicz, J., Atanassov, K.T., Krawczak, M., Chountas, P., Melo-Pinto, P., Georgiev, P., Kim, T. and Tasseva, V. 2005. Generalized net model with intuitionistic fuzzy estimations of the process of obtaining of scientific titles and degrees. Notes on Intuitionistic Fuzzy Sets. 11, pp. 95-114.

A breast cancer diagnosis system: a combined approach using rough sets and probabilistic neural networks
Revett, K., Gorunescu, F., Gorunescu, M., El-Darzi, E. and Ene, M. 2005. A breast cancer diagnosis system: a combined approach using rough sets and probabilistic neural networks. in: EUROCON 2005: the International Conference on "Computer as a Tool": Belgrade, Serbia and Montenegro, November 21-24 2005 London, UK IEEE .

Intuitionistic fuzzy generalised nets in modelling web usage patterns indentification
Petrounias, I., Tseng, A., Chountas, P., El-Darzi, E. and Kodogiannis, V. 2005. Intuitionistic fuzzy generalised nets in modelling web usage patterns indentification. Notes on Intuitionistic Fuzzy Sets. 11 (4), pp. 123-129.

A feature selection procedure and its application in health care
Liu, P., El-Darzi, E., Vasilakis, C., Chountas, P., Huang, W. and Zhu, J. 2005. A feature selection procedure and its application in health care. Craiova Medical Journal.

An analysis of missing data treatment methods and their application to health care dataset
Liu, P., El-Darzi, E., Lei, L., Vasilakis, C., Chountas, P. and Huang, W. 2005. An analysis of missing data treatment methods and their application to health care dataset. in: Li, X., Wang, S. and Dong, Z.Y. (ed.) Advanced Data Mining and Applications: First International Conference, ADMA 2005, Wuhan, China, July 22-24, 2005: proceedings Berlin, Germany Springer.

An application of intuitionistic fuzzy relational databases in football match result predictions
Kolev, B., Chountas, P., Petrounias, I. and Kodogiannis, V. 2005. An application of intuitionistic fuzzy relational databases in football match result predictions. in: Reusch, B. (ed.) Computational intelligence, theory and applications: International Conference 8th Fuzzy Days in Dortmund, Germany, Sept. 29-Oct. 01, 2004, Proceedings Berlin, Germany Springer. pp. 281-289

Representing uncertainty and ignorance in probabilistic data using the intuitionistic fuzzy relational data model
Kolev, B., Chountas, P., Atanassov, K.T. and Petrounias, I. 2005. Representing uncertainty and ignorance in probabilistic data using the intuitionistic fuzzy relational data model. in: Atanassov, K.T., Kacprzyk, J., Krawczak, M. and Szmidt, E. (ed.) Issues in the representation and processing of uncertain and imprecise information Exit Academic Book Publishers. pp. 198-208

Identification of urinary tract infections using soft computing techniques
Kodogiannis, V., Wadge, E., Chountas, P. and Petrounias, I. 2005. Identification of urinary tract infections using soft computing techniques. Journal of Computational Methods in Sciences and Engineering. 5 (4), pp. 225-241.

Multi-lingual database querying and the atoms of language
Kapetanios, E. and Chountas, P. 2005. Multi-lingual database querying and the atoms of language. in: Montoyo, A., Munoz, R. and Metais, E. (ed.) Natural Language Processing and Information Systems: 10th International Conference on Applications of Natural Language to Information Systems, NLDB 2005, Alicante, Spain, June 15-17, 2005. Proceedings Berlin, Germany Springer.

MDDQL: an ontology driven, multi-lingual query language and system for an integrated view of heterogeneous data sources
Kapetanios, E. and Chountas, P. 2005. MDDQL: an ontology driven, multi-lingual query language and system for an integrated view of heterogeneous data sources. Semantic Technology Conference 2005. California, USA 07-10 Mar 2005

A heuristic approach in hepatic cancer diagnosis using a probabilistic neural network-based model
Gorunescu, M., Gorunescu, F., Ene, M. and El-Darzi, E. 2005. A heuristic approach in hepatic cancer diagnosis using a probabilistic neural network-based model. in: Janssen, J. and Lenca, P. (ed.) Applied Stochastic Models and Data Analysis Brest, France ENST Bretagne. pp. 1016-1025

A hybrid approach to cancer classification: rough sets and probabilistic neural networks
Gorunescu, F., Gorunescu, M., El-Darzi, E., Gorunescu, S., Revett, K. and Khan, A. 2005. A hybrid approach to cancer classification: rough sets and probabilistic neural networks. in: The First East European Conference on Health Care Modelling and Computation (HCMC 2005). Craiova, Romania, August 31st - September 2nd, 2005 Craiova, Romania Universitatea din Craiova. pp. 149-159

An evolutionary computational approach to probabilistic neural network with application to hepatic cancer diagnosis
Gorunescu, F., Gorunescu, M., El-Darzi, E. and Gorunescu, S. 2005. An evolutionary computational approach to probabilistic neural network with application to hepatic cancer diagnosis. in: Tsymbal, A. and Cunningham, P. (ed.) 18th IEEE Symposium on Computer-Based Medical Systems, 2005: proceedings USA IEEE . pp. 461-466

Representation of factual and temporal unawareness in electronic patient records
Chountas, P., Petrounias, I., El-Darzi, E. and Kodogiannis, V. 2005. Representation of factual and temporal unawareness in electronic patient records. Journal of Computational Methods in Sciences and Engineering. 5 (4), pp. 243-261.

On probability, null values, intuitionistic fuzzy, and value imperfection
Chountas, P., Kodogiannis, V., Petrounias, I., Kolev, B. and Atanassov, K.T. 2005. On probability, null values, intuitionistic fuzzy, and value imperfection. in: Simos, T.E. and Maroulis, G. (ed.) International Conference of Computational Methods in Sciences and Engineering 2004 (ICCMSE 2004) Leiden, The Netherlands VSP.

A data warehouse environment for storing and analyzing simulation output data
Vasilakis, C., El-Darzi, E. and Chountas, P. 2004. A data warehouse environment for storing and analyzing simulation output data. in: Ingalls, R.G., Rossetti, M.D., Smith, J.S. and Peters, B.A. (ed.) Proceedings of the 2004 Winter Simulation Conference USA IEEE .

Distimulus chromatic measurement systems
Tomtsis, D., Kodogiannis, V. and Chountas, P. 2004. Distimulus chromatic measurement systems. WSEAS Transactions on Circuits and Systems. 2 (3), pp. 211-214.

An intuitionistic fuzzy component based appoach for identifying web usage patterns
Petrounias, I., Tseng, A., Kolev, B., Chountas, P. and Kodogiannis, V. 2004. An intuitionistic fuzzy component based appoach for identifying web usage patterns. in: Yager, R.R. and Sgurev, V.S. (ed.) 2nd IEEE International Conference on Intelligent Systems, 22-24 Jun 2004, Varna, Bulgaria: proceedings USA IEEE .

Comparative analysis of data mining algorithms for predicting inpatient length of stay
Liu, P., El-Darzi, E., Vasilakis, C., Chountas, P., Huang, W. and Lei, L. 2004. Comparative analysis of data mining algorithms for predicting inpatient length of stay. Pacific Asia Conference on Information Systems 2004. Bangkok, Thailand 07-10 Jul 2005

Developing an agent oriented emergency service system with AUML and gaia methodology
Huang, W., El-Darzi, E. and Beer, M.D. 2004. Developing an agent oriented emergency service system with AUML and gaia methodology. in: Proceedings of the International Conference on Computer, Communication and Control Technologies (CCCT '04), University of Texas, U.S.A, August 14-17, 2004 USA IEEE . pp. 244-252

On uncertainty and data-warehouse design
Chountas, P., Petrounias, I., Vasilakis, C., Tseng, A., El-Darzi, E., Atanassov, K.T. and Kodogiannis, V. 2004. On uncertainty and data-warehouse design. in: Yakhno, T. (ed.) Advances in Information Systems: Third International Conference, ADVIS 2004, Izmir, Turkey, October 20-22, 2004: proceedings Berlin, Germany Springer.

Temporality and intuitionistic fuzzy data warehouses
Chountas, P., Petrounias, I., Vasilakis, C., El-Darzi, E., Tseng, A., Kolev, B., Kodogiannis, V. and Georgiev, P. 2004. Temporality and intuitionistic fuzzy data warehouses. Notes in Intuitionistic Fuzzy Sets. 10 (4), pp. 47-55.

Temporality and intuitionistic fuzzy data warehouses
Chountas, P., Petrounias, I., Vasilakis, C. and El-Darzi, E. 2004. Temporality and intuitionistic fuzzy data warehouses. Notes on Intuitionistic Fuzzy Sets. 10 (4), pp. 47-55.

Representing and querying temporal workflow schemas
Chountas, P., Petrounias, I., Al-Roki, H. and Kodogiannis, V. 2004. Representing and querying temporal workflow schemas. in: Haav, H.M. (ed.) Fifth International Baltic Workshop on Databases and Information Systems: databases and information systems Institute of Cybernetics at Tallinn Technical University. pp. 155-166

Development of a clinical data warehouse
Chountas, P. and Kodogiannis, V. 2004. Development of a clinical data warehouse. in: Desai, B.C. (ed.) IDEAS Workshop on Medical Information Systems: the digital hospital USA IEEE . pp. 8-14

A complete framework for Web mining
Tseng, A., Petrounias, I. and Chountas, P. 2003. A complete framework for Web mining. in: IEEE International Conference on Systems, Man and Cybernetics, 2003 Los Alamitos, USA IEEE .

Representation and modelling of electronic patient records
Sivagurunathan, K., Chountas, P. and El-Darzi, E. 2003. Representation and modelling of electronic patient records. in: Proceedings of the International Conference of Computational Methods in Sciences and Engineering 2003 (ICCMSE 2003): Kastoria, Greece, September 12-16 New Jersey, USA World Scientific Publishing. pp. 598-603

Constraint based web mining
Petrounias, I., Tseng, A. and Chountas, P. 2003. Constraint based web mining. in: Simos, T.E. (ed.) Proceedings of the International Conference of Computational Methods in Sciences and Engineering 2003 (ICCMSE 2003): Kastoria, Greece, September 12-16 New Jersey, USA World Scientific Publishing. pp. 504-511

An overview of modelling patient behaviour in health care systems
Marshall, A.H. and Vasilakis, C. 2003. An overview of modelling patient behaviour in health care systems. in: Taylor, J. (ed.) Keynote Papers Birmingham, UK Operational Research Society.

Intuitionistic fuzzy relational databases
Kolev, B. and Chountas, P. 2003. Intuitionistic fuzzy relational databases. Notes on Intuitionistic Fuzzy Sets. 9 (4), pp. 109-113.

Evolutionary computing techniques for diagnosis of urinary tract infections in vivo, using gas sensors
Kodogiannis, V., Pavlou, A.K., Chountas, P. and Turner, A.P.F. 2003. Evolutionary computing techniques for diagnosis of urinary tract infections in vivo, using gas sensors. in: Rutkowski, L. (ed.) Neural networks and soft computing: proceedings of the Sixth International Conference on Neural Networks and Soft Computing, Zakopane, Poland, June 11-15 Physica-Verlag.

A Generalized net, representing the functioning and the results of the work of Fuzzy Petri Nets
Gochev, V., Atanassov, K.T. and Chountas, P. 2003. A Generalized net, representing the functioning and the results of the work of Fuzzy Petri Nets. in: Jardim-Goncalves, R., Cha, J. and Steiger-Garcao, A. (ed.) Concurrent engineering--the vision for the future generation in research and applications: proceedings of the 10th ISPE International Conference on Concurrent Engineering, Research and Applications, 26-30 July 2003 Lisse, Netherlands A.A. Balkema. pp. 1009-1012

Generalized net with partial batch token movement
Georgiev, P. and Chountas, P. 2003. Generalized net with partial batch token movement. in: Jardim-Goncalves, R., Cha, J. and Steiger-Garcao, A. (ed.) Concurrent engineering--the vision for the future generation in research and applications: proceedings of the 10th ISPE International Conference on Concurrent Engineering, Research and Applications, 26-30 July 2003 Lisse, Netherlands A.A. Balkema. pp. 1005-1008

Data warehouses-TOLAP-decision making
Chountas, P., Vasilakis, C., El-Darzi, E., Petrounias, I. and Tseng, A. 2003. Data warehouses-TOLAP-decision making. in: IEEE International Conference on Systems, Man and Cybernetics, 2003 USA IEEE .

Temporal modelling in flexible workflow based environments
Chountas, P., Petrounias, I. and Kodogiannis, V. 2003. Temporal modelling in flexible workflow based environments. in: Yazici, A. (ed.) Computer and information sciences, ISCIS 2003: 18th International Symposium Antalya, Turkey, November 3-5 Berlin, Germany Springer. pp. 123-130

IFGNs in analysing transaction database systems with continuous deadlock detection
Kolev, B., Petrounias, I. and Chountas, P. 2002. IFGNs in analysing transaction database systems with continuous deadlock detection. Notes in Intuitionistic Fuzzy Sets. 8 (3), pp. 95-100.

Intelligent diagnosis of urinary tract infections in vivo, using electronic noses
Kodogiannis, V., Pavlou, A.K., Chountas, P. and Turner, A.P.F. 2002. Intelligent diagnosis of urinary tract infections in vivo, using electronic noses. in: Hamza, M.H. (ed.) Proceedings of the IASTED International Conference, Signal Processing, Pattern Recognition, and Application, June 25-28, 2002, Crete, Greece Calgary, Canada Acta Press. pp. 155-160

Electronic nose: clinical diagnosis based on soft computing methodologies
Kodogiannis, V., Chountas, P., Pavlou, A.K., Petrounias, I., Chowdrey, H.S. and Temponi, C. 2002. Electronic nose: clinical diagnosis based on soft computing methodologies. in: Proceedings of the IEEE International Symposium Intelligent Systems: Methodology, Models, Applications in Emerging Technologies IS2002, 10-12 Sept.2002, Varna, Bulgaria USA IEEE .

Representation of temporal unawareness
Chountas, P., Petrounias, I., Atanassov, K.T., Kodogiannis, V. and El-Darzi, E. 2002. Representation of temporal unawareness. in: Yakhno, T. (ed.) Advances in Information Systems: Second International Conference, ADVIS 2002, Izmir, Turkey, October 23-25 London, UK Springer.

Representation and querying of temporal conflict
Chountas, P., Petrounias, I., Atanassov, K.T., Kodogiannis, V. and El-Darzi, E. 2002. Representation and querying of temporal conflict. in: Troels, A. (ed.) Flexible query answering systems: 5th International Conference, FQAS 2002, Copenhagen, Denmark, October 2002 London, UK Springer.

Representing and querying temporal workflow schemas
Chountas, P., Petrounias, I., Al-Roki, H. and Kodogiannis, V. 2002. Representing and querying temporal workflow schemas. Notes in Intuitionistic Fuzzy Sets. 8 (3), pp. 57-65.

A simulation study of the winter bed crisis
Vasilakis, C. and El-Darzi, E. 2001. A simulation study of the winter bed crisis. Health Care Management Science. 4 (1), pp. 31-36. https://doi.org/10.1023/A:1009649615548

The LH5 model for data mining
El-Darzi, E. and Parapadakis, D. 2001. The LH5 model for data mining. First International Conference of Electronic Business. Hong Kong 19-21 Dec 2001 pp. 467-478

Electronic nose: clinical diagnosis based on soft computing methodologies
Kodogiannis, V., Chountas, P., Pavlou, A.K. and Chowdrey, H.S. 2001. Electronic nose: clinical diagnosis based on soft computing methodologies. in: 2002 First International IEEE Symposium "Intelligent Systems" proceedings: September 10-12, 2002, St. Constantine and Helena resort, Varna, Bulgaria USA IEEE . pp. 254-259

Virtual integration of temporal and conflicting information
Chountas, P. and Petrounias, I. 2001. Virtual integration of temporal and conflicting information. in: 2001 International Database Engineering & Applications Symposium: proceedings: 16-18 July, 2001, Grenoble, France California, USA IEEE . pp. 243-248

Precise enterprises and imprecise data
Chountas, P. and Petrounias, I. 2001. Precise enterprises and imprecise data. in: Barzdins, J. and Caplinskas, A. (ed.) Databases and information systems: Fourth International Baltic Workshop, Baltic DB&IS 2000, Vilnius, Lithuania, May 1-5, 2000 London, UK Kluwer Academic Publishers. pp. 57-68

Editorial: Modelling the process of care
Chaussalet, T.J. and El-Darzi, E. 2001. Editorial: Modelling the process of care. Health Care Management Science. 4 (1), p. 5. https://doi.org/10.1023/A:1009659711914