Dr Ivan Olier

Title: Lecturer in Health Informatics
Phone: +44 (0) 1782 671621
Email:
Location: Institute for Science & Technology in Medicine, Keele University, Guy Hilton Research Centre, Thornburrow Drive, Hartshill, Stoke-on-Trent ST4 7QB United Kingdom
Role: ISTM Research theme: 1. Health Services Research
Contacting me: By phone or email please
Ivan_Olier_ac_185x250

I am a Lecturer in Health Informatics at Keele University and an honorary Lecturer at the University of Manchester, having been appointed in 2015. My research interests are in statistical and machine learning modelling of large-scale databases, with special attention to applications in health and bioinformatics.

In 2008, I was awarded with a PhD in Computer Science from the Technical University of Catalonia, Spain, being Bayesian modelling of multivariate time series the main topic of my thesis. Since then, and before joining Keele, I worked as a postdoctoral researcher, firstly at the Autonomous University of Barcelona (1 year), and then, at the University of Manchester (5 years), being involved in several research projects in statistical machine learning and Bayesian methods with applications in neuroimaging, public health and bioinformatics.

ISTM Research Theme: Health Service Research Unit

My main areas of research are:

- Statistical machine learning methods

- Bayesian modelling

- Large-scale dataset analysis, focussing on public health and bioinformatics data.


I am a fellow of the Royal Statistical Society, a member of the International Society of Bayesian Analysis, and a member of the IEEE Medical Data Analysis Task Force of the Computational Intelligence Society.

Selected Publications

  • Olier I. 2016. Modelling conditions and health care processes in electronic health records: an application to severe mental illness with the clinical practice research datalink. PLoS One. doi>
  • Mocioiu V, Ortega-Martorell S, Olier I, Jablonski M, Starcukova J, Lisboa P, Arús C, Julià-Sapé M. 2015. From raw data to data-analysis for magnetic resonance spectroscopy--the missing link: jMRUI2XML. BMC Bioinformatics, vol. 16, 378. link> doi>
  • Springate DA, Kontopantelis E, Ashcroft DM, Olier I, Parisi R, Chamapiwa E, Reeves D. 2014. ClinicalCodes: an online clinical codes repository to improve the validity and reproducibility of research using electronic medical records. PLoS One, vol. 9(6), e99825. link> doi>
  • Olier I, Trujillo-Barreto NJ, El-Deredy W. 2013. A switching multi-scale dynamical network model of EEG/MEG. Neuroimage, vol. 83, 262-287. link> doi>
  • Olier I, Amengual J, Vellido A. 2011. A variational Bayesian approach for the robust analysis of the cortical silent period from EMG recordings of brain stroke patients. Neurocomputing, vol. 74, 1301-1314. doi>

Full Publications List show

Journal Articles

  • Rashid M, Kwok CS, Gale CP, Doherty P, Olier I, Sperrin M, Kontopanetis E, Peat G, Mamas M. 2016. Impact of Co-morbid burden on mortality in patients with coronary heart disease, heart failure and cerebrovascular accident: A systematic review and meta-analysis. European Heart Journal - Quality of Care and Clinical Outcomes. doi>
  • Delgado-Goñi T, Ortega-Martorell S, Ciezka M, Olier I, Candiota AP, Julià-Sapé M, Fernández F, Pumarola M, Lisboa PJ, Arús C. 2016. MRSI-based molecular imaging of therapy response to temozolomide in preclinical glioblastoma using source analysis. NMR in biomedicine. doi>
  • Olier I. 2016. Modelling conditions and health care processes in electronic health records: an application to severe mental illness with the clinical practice research datalink. PLoS One. doi>
  • Mocioiu V, Ortega-Martorell S, Olier I, Jablonski M, Starcukova J, Lisboa P, Arús C, Julià-Sapé M. 2015. From raw data to data-analysis for magnetic resonance spectroscopy--the missing link: jMRUI2XML. BMC Bioinformatics, vol. 16, 378. link> doi>
  • Reilly S, Olier I, Planner C, Doran T, Reeves D, Ashcroft DM, Gask L, Kontopantelis E. 2015. Inequalities in physical comorbidity: a longitudinal comparative cohort study of people with severe mental illness in the UK. BMJ Open, vol. 5(12), e009010. link> doi>
  • Springate DA, Kontopantelis E, Ashcroft DM, Olier I, Parisi R, Chamapiwa E, Reeves D. 2014. ClinicalCodes: an online clinical codes repository to improve the validity and reproducibility of research using electronic medical records. PLoS One, vol. 9(6), e99825. link> doi>
  • Olier I, Trujillo-Barreto NJ, El-Deredy W. 2013. A switching multi-scale dynamical network model of EEG/MEG. Neuroimage, vol. 83, 262-287. link> doi>
  • Olier I, Amengual J, Vellido A. 2011. A variational Bayesian approach for the robust analysis of the cortical silent period from EMG recordings of brain stroke patients. Neurocomputing, vol. 74, 1301-1314. doi>
  • Ortega-Martorell S, Olier I, Julià-Sapé M, Arús C. 2010. SpectraClassifier 1.0: a user friendly, automated MRS-based classifier-development system. BMC Bioinformatics, vol. 11, 106. doi>
  • Olier I and Vellido A. 2008. Variational Bayesian Generative Topographic Mapping. J. Math. Model. Algorithms, vol. 7, 371-387. doi>
  • Olier I and Vellido A. 2008. Advances in clustering and visualization of time series using GTM through time. Neural Networks, vol. 21, 904-913. doi>
  • Barreto L, Canadell D, Petrezsélyová S, Navarrete C, Maresová L, Peréz-Valle J, Herrera R, Olier I, Giraldo J, Sychrová H, Yenush L, Ramos J, Ariño J. 2011. A genomewide screen for tolerance to cationic drugs reveals genes important for potassium homeostasis in Saccharomyces cerevisiae. Eukaryot Cell, vol. 10(9), 1241-1250. link> doi>
  • Ortega-Martorell S, Ruiz H, Vellido A, Olier I, Romero E, Julià-Sapé M, Martín JD, Jarman IH, Arús C, Lisboa PJG. 2013. A novel semi-supervised methodology for extracting tumor type-specific MRS sources in human brain data. PLoS One, vol. 8(12), e83773. link> doi>
  • Reeves D, Springate DA, Ashcroft DM, Ryan R, Doran T, Morris R, Olier I, Kontopantelis E. 2014. Can analyses of electronic patient records be independently and externally validated? The effect of statins on the mortality of patients with ischaemic heart disease: a cohort study with nested case-control analysis. BMJ Open, vol. 4(4), e004952. link> doi>
  • García-Gómez JM, Luts J, Julià-Sapé M, Krooshof P, Tortajada S, Robledo JV, Melssen W, Fuster-García E, Olier I, Postma G, Monleón D, Moreno-Torres A, Pujol J, Candiota A-P, Martínez-Bisbal MC, Suykens J, Buydens L, Celda B, Van Huffel S, Arús C, Robles M. 2009. Multiproject-multicenter evaluation of automatic brain tumor classification by magnetic resonance spectroscopy. MAGMA, vol. 22(1), 5-18. link> doi>
  • Kontopantelis E, Olier I, Planner C, Reeves D, Ashcroft DM, Gask L, Doran T, Reilly S. 2015. Primary care consultation rates among people with and without severe mental illness: a UK cohort study using the Clinical Practice Research Datalink. BMJ Open, vol. 5(12), e008650. link> doi>
  • Pérez-Ruiz A, Julià-Sapé M, Mercadal G, Olier I, Majós C, Arús C. 2010. The INTERPRET Decision-Support System version 3.0 for evaluation of Magnetic Resonance Spectroscopy data from human brain tumours and other abnormal brain masses. BMC Bioinformatics, vol. 11, 581. link> doi>

Other

  • Olier I, Grosan C, Sadawi N, Soldatova LN, King RD. 2015. Meta-QSAR: Learning How to Learn QSARs. In J. Vanschoren, P. Brazdil, CG. Giraud-Carrier & L. Kotthoff (Eds.). MetaSel@PKDD/ECML (vol. 1455, pp. 104-105). CEUR-WS.org. link>
  • Ortega-Martorell S, Olier I, Julià-Sapé M, Arús C, Lisboa PJG. 2014. Automatic relevance source determination in human brain tumors using Bayesian NMF. CIDM (pp. 99-104). IEEE. doi> link>
  • Tosi A, Olier I, Vellido A. 2014. Probability Ridges and Distortion Flows: Visualizing Multivariate Time Series Using a Variational Bayesian Manifold Learning Method. In T. Villmann, F-M. Schleif, M. Kaden & M. Lange (Eds.). WSOM (vol. 295, pp. 55-64). Springer. doi> link>
  • Ortega-Martorell S, Olier I, Delgado-Goni T, Ciezka M, Julià-Sapé M, Lisboa PJG, Arús C. 2014. Semi-supervised source extraction methodology for the nosological imaging of glioblastoma response to therapy. CIDM (pp. 93-98). IEEE. doi> link>
  • Vellido A, Cárdenas MI, Olier I, Rovira X, Giraldo J. 2011. A probabilistic approach to the visual exploration of G Protein-Coupled Receptor sequences. ESANN. link>
  • Olier I, Vellido A, Giraldo J. 2010. Kernel generative topographic mapping. ESANN. link>
  • Olier I, Amengual J, Vellido A. 2010. Segmentation of EMG time series using a variational Bayesian approach for the robust estimation of cortical silent periods. ESANN. link>
  • Ortega-Martorell S, Olier I, Vellido A, Julià-Sapé M, Arús C. 2010. Spectral Prototype Extraction for dimensionality reduction in brain tumour diagnosis. ESANN. link>
  • Olier I and Vellido A. 2008. A variational formulation for GTM through time. IJCNN (pp. 516-521). IEEE. doi> link>
  • Olier I and Vellido A. 2008. On the benefits for model regularization of a variational formulation of GTM. IJCNN (pp. 1568-1575). IEEE. doi> link>
  • Olier I and Vellido A. 2006. Variational GTM. IDEAL 2006. doi>
  • Olier I and Vellido A. 2006. Time Series Relevance Determination Through a Topology-Constrained Hidden Markov Model. In E. Corchado, H. Yin, VJ. Botti & C. Fyfe (Eds.). IDEAL (vol. 4224, pp. 40-47). Springer. doi> link>
  • Olier I and Vellido A. 2005. Comparative Assessment of the Robustness of Missing Data Imputation Through Generative Topographic Mapping. In J. Cabestany, A. Prieto & FS. Hernández (Eds.). IWANN (vol. 3512, pp. 787-794). Springer. doi> link>