Dr Christos Vasilakis

Senior Lecturer until July 2007

Short bio

In my first year in the UK, I obtained my MSc in Decision Sciences with distinction from University of Westminster, London (1998). For my MSc project I was sent to the geriatric department of St. George’s Hospital Medical School, University of London, where under the supervision of Prof Peter Millard. I  started working in health care systems and more specifically, modeling the flow of patients through hospital departments. The main theme of my PhD thesis (under the supervision of Dr Elia El-Darzi and Prof Peter Millard) is the interaction of data modeling techniques (mainly data warehousing and OLAP) and OR/MS techniques (mainly discrete event simulation) in modeling hospital bed occupancy and length of stay (read the abstract of my thesis). Previously, I had spent 4 years working for Lavisoft Information Systems S.A., an IT company based in Athens, Greece, as an IT developer. I am appointed a senior lecturer in database systems at Harrow School of Computer Science, University of Westminster. I recently completed my post-doctoral training at the Department of Health Care and Epidemiology, University of British Columbia in Vancouver, Canada under the supervision of Drs Boris Sobolev and Adrian Levy where I was partially supported by a Michael Smith Foundation fellowship.

 

*** Now with the Clinical Operational Research Unit, University College London ***

 

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Current research projects

 

Developing capacity for evaluating proposed policies in the care for older patients through computer simulations (with Dr Chooi Lee, Kingston Hospital).

This study is partially funded by a Strategic Promotion of Ageing Research Capacity award (SPARC, an EPSRC/BBSRC initiative).

 

Developing a participative user tool to aid the conceptual development of simulation models in healthcare (with Dr Kathy Kotiadis, Warwick Business School).

This study is funded by an EPSRC grant (EP/E045871/1).

 

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Forthcoming and recent talks

 

 

TBA

 

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Selected publications

 

Selected journal articles

1.

Sobolev B, Harel D, Vasilakis C and Levy AR (2007) Using the Statecharts paradigm for simulation of patient flow in surgical care. Health Care Management Science in press. Abstract from PubMed

2.

Vasilakis C, Sobolev B, Kuramoto L and Levy AR (2006) A simulation study of scheduling clinic appointments in surgical care: individual-surgeon versus pooled lists. Journal of Operational Research Society 58, 202-211 Abstract from PubMed

3.

Vasilakis C and Kuramoto L (2005) Comparing Two Methods of Scheduling Outpatient Clinic Appointments Using Simulation Experiments. Clinical & Investigative Medicine 28, 368-370 Abstract from PubMed

4.

Vasilakis C and Marshall AH (2005) Modelling nationwide hospital length of stay: opening the black box. Journal of Operational Research Society 56, 862-869 Abstract from PubMed

5.

Marshall AH, Vasilakis C and El-Darzi E (2005) Length of Stay-Based Patient Flow Models: Recent Developments and Future Directions. Health Care Management Science 8, 213-220 Abstract from PubMed

6.

Vasilakis C and El-Darzi E (2001)  A simulation study of the winter bed crisis.  Health Care Management Science 4, 31-36 Abstract from PubMed

7.

Millard PH, Mackay M, Vasilakis C and Christodoulou G (2000)  Measuring and modelling surgical bed usage.  Annals of the Royal College of Surgeons of England 82, 75-82 Abstract from PubMed

8.

El-Darzi E, Vasilakis C, Chaussalet T and Millard PH (1998)  A Simulation Modelling Approach to Evaluating Length of Stay, Occupancy, Emptiness and Bed Blocking in a Hospital Geriatric Department.  Health Care Management Science  1, 143-149 Abstract from PubMed

9.

Lee C, Vasilakis C, Kearney D, Pears R and  Millard PH (1998)  The impact of the admission and discharge of stroke patients aged 65 and over on bed occupancy in English hospitals.  Health Care Management Science 1, 151-157 Abstract from PubMed

 

Selected published contributions to a collective work/book chapters

1.

Tasseva V, Peneva D, Atanassov KT, El-Darzi E, Chountas P and Vasilakis C (2007). Generalized Net Model for Outpatient Care in Bulgaria. 20th IEEE International Symposium on Computer-based Medical Systems (CBMS 2007), Maribor, Slovenia, IEEE Press, in press.

2.

Abbi R, El-Darzi E and Vasilakis C (2007). Intelligent grouping methods for modelling patient flow. International Conference on Industrial Engineering and Systems Management (IESM 2007), Beijing, China, in press.

3.

Vasilakis C, El-Darzi E and Chountas P (2006) An OLAP-Enabled Software Environment for Modeling Patient Flow. Proceedings of the 3rd IEEE Conference on Intelligent Systems (IS’06), IEEE Press, 261-266.

4.

Peng Liu, L. Lei E. El-Darzi, C. Vasilakis, P. Chountas, W. Huang (2005) An analysis of missing data treatment methods and their application to health care dataset. Proceedings of the 2005 Advanced Data Mining and Applications, eds. X. Li, S. Wang, and Z.Y. Dong, LNAI 3584 Springer, 583-590 Abstract from PubMed

5.

Vasilakis C, El-Darzi E and Chountas P (2004) A Data Warehouse Environment for Storing and Analyzing Simulation Output Data. Proceedings of the 2004 Winter Simulation Conference, eds. R. G. Ingalls, M. D. Rossetti, J. S. Smith and B. A. Peters. Piscataway, New Jersey: Institute of Electrical and Electronics Engineers, pp. 703-710 (pdf)

6.

Pelletier C, Chaussalet T, Szirbik N and Vasilakis C, (2004) Integration of Data on Long-Term Care from Heterogeneous Sources for Research Purposes. Proceedings of the International Federation for Medical and Biological Engineering, Vol 6. MEDICON and HEALTH TELEMATICS 2004 "Health in the Information Society" July 31 - August 5, 2004. Ischia, Naples – Italy (pdf)

7.

Peng Liu, E. El-Darzi, C. Vasilakis, P. Chountas, W. Huang, L. Lei (2004) Comparative analysis of data mining algorithms for predicting inpatient length of stay. Proceedings of the Eighth Pacific-Asia Conference on Information Systems (PACIS 2004), July 8-11, 2004, Shanghai, China, pp. 1087-1097

8.

Vasilakis C, El-Darzi E and Chountas P (2003) Data Cube Modelling and OLAP Algebra for Hospital Length of Stay Analysis. Proceedings of The 1st MEDINF International Conference on Medical Informatics & Engineering, Craiova Medicala Journal, Vol. 5, Sup. 3, pp. 509-512

9.

Marshall AH and Vasilakis C (2003) An Overview of Modelling Patient Behaviour in Health Care Systems. Keynote Papers, YOR13 (Ed, J. Taylor) Operational Research Society: Birmingham, pp 31-45, ISBN: 0903440288

10.

El-Darzi E, Vasilakis C, Chaussalet T and Millard PH (2000) A simulation model to evaluate the interaction between acute, rehabilitation, long-stay care and the community.  Decision Making: Recent Developments and Worldwide Applications, Vol. 45 (Eds, Zanakis S.H., Doukidis G. and Zopounidis C.) Kluwer Academic Publishers, Dordrecht, pp. 475-485, ISBN: 0792366212

11.

El-Darzi E, Vasilakis C, Chaussalet T, and Millard PH, (1999) A simulation approach to modelling the flow of patients between and within a hospital geriatric department and the community. Despotis D.K. and Zopounidis C., (Eds.)  Integrating technology and humans decisions: global bridges into the 21st century.  Athens, New Technology Publications, Jun, 1999, pp. 674 – 677

 

 

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Contact details

Dr Christos Vasilakis
Harrow School of Computer Science
University of Westminster
Watford Road
Harrow HA1 3TP

UK

Voice: +44 (0) 20 7911 5000 ext. 4029
Fax: +44 (0) 20 7911 5906
Room no: E1.4

email: C.M.Vasilakis [at] Westminster [dot] ac [dot] uk


Last Updated: 3 Aug 2007