JARI KAIPIO

Contact info

Research groups

• Computational Physics and Inverse Problems research group

Publications

• Silva, Gabriel LS; Castello, Daniel A; Borges, Lavinia; Kaipio, Jari P. 2020. Damage identification in plates under uncertain boundary conditions Mechanical systems and signal processing 144: 106884. 2020
• Castello, Daniel A; Kaipio, Jari P. 2019. Modeling errors due to Timoshenko approximation in damage identification International journal for numerical methods in engineering 120 9: 1148-1162. 2019
• Abreu, Luiz AS; Orlande, Helcio RB; Colaço, Marcelo J; Kaipio, Jari; Kolehmainen, Ville; Pacheco, César C; Cotta, Renato M. 2018. Detection of contact failures with the Markov chain Monte Carlo method by using integral transformed measurements International journal of thermal sciences 132: 486-497. 2018
• Huttunen, JMJ; Kaipio, JP; Haario, H. 2018. Approximation error approach in spatiotemporally chaotic models with application to Kuramoto-Sivashinsky equation. COMPUTATIONAL STATISTICS & DATA ANALYSIS 123: 13-31. 2018
• Nicholson, Ruanui; Petra, Noémi; Kaipio, Jari P. 2018. Estimation of the Robin coefficient field in a Poisson problem with uncertain conductivity field INVERSE PROBLEMS 34 11: 1-26. 2018
• Rimpiläinen, Ville; Koulouri, Alexandra; Lucka, Felix; Kaipio, Jari P; Wolters, Carsten H. 2018. Improved EEG source localization with Bayesian uncertainty modelling of unknown skull conductivity Neuroimage 2019; 188: 252-260. 2018
• Tick, Jenni; Pulkkinen, Aki; Lucka, Felix; Ellwood, Robert; Cox, Ben T; Kaipio, Jari P; Arridge, Simon R; Tarvainen, Tanja. 2018. Three dimensional photoacoustic tomography in Bayesian framework JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 144 4: 2061. 2018
• Gulley AK, Eccles JD, Kaipio JP, Malin PE. 2017. The effect of gradational velocities and anisotropy on fault-zone trapped waves. Geophysical Journal International 210 2: 964-978. 2017
• Gulley AK, Kaipio JP, Eccles JD, Malin PE. 2017. A numerical approach for modelling fault-zone trapped waves. Geophysical Journal International 210 2: 919-930. 2017
• Pulkkinen Aki, Cox Ben T, Arridge Simon R, Kaipio Jari P, Tarvainen Tanja. 2017. Estimation and uncertainty quantification of optical properties directly from the photoacoustic time series. Proceedings of SPIE 10064 March 3, 2017: 100643N. 2017
• Qui Chen, Heilman Bianca Maceo, Kaipio Jari, Donaldson Paul, Vaghefi Ehsan. 2017. Fully automated laser ray tracing system to measure changes in the crystalline lens GRIN profile. Biomedical Optics Express 8 11: 4947-4964. 2017
• Toivanen JM, Tarvainen T, Huttunen JMJ, Savolainen T, Pulkkinen A, Orlande HRB, Kaipio JP, Kolehmainen V. 2017. Thermal tomography utilizing truncated Fourier series approximation of the heat diffusion equation. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 108 Part A: 860-867. 2017
• Tarvainen Tanja, Pulkkinen Aki, Cox Beb T, Kaipio Jari P, Arridge Simon R. 2016. Image reconstruction with noise and error modelling in quantitative photoacoustic tomography. In: Oraevsky Alexander A, Wang Lihong V (ed.) , SPIE Proceedings 9708: Photons Plus Ultrasound: Imaging and Sensing. Proceedings of SPIE 9708. s. 97083Q. 2016
• Pulkkinen Aki, Cox Ben T, Arridge Simon R, Kaipio Jari P, Tarvainen Tanja. 2016. Bayesian parameter estimation in spectral quantitative photoacoustic tomography. In: Oraevsky Alexander A, Wang Lihong V (ed.) , SPIE Proceedings 9708: Photons Plus Ultrasound: Imaging and Sensing. Proceedings of SPIE 9708. s. 97081G. 2016
• Pulkkinen Aki, Cox Ben T, Arridge Simon R, Goh Hwan, Kaipio Jari P, Tarvainen Tanja. 2016. Direct Estimation of Optical Parameters From Photoacoustic Time Series in Quantitative Photoacoustic Tomography. IEEE TRANSACTIONS ON MEDICAL IMAGING 35 11: 2497-2508. 2016
• Koulouri Alexandra, Rimpiläinen Ville, Brookes Mike, Kaipio Jari P. 2016. Compensation of domain modelling errors in the inverse source problem of the Poisson equation: Applicationin electroencephalographic imaging. APPLIED NUMERICAL MATHEMATICS 106: 24-36. 2016
• Ardekani Iman Tabatabaei, Kaipio Jari P, Nasiri Alireza, Sharifzadeh Hamid, Abdulla Waleed H. 2016. A Statistical Inverse Problem Approach to Online Secondary Path Modeling in Active Noise Control. IEEE/ACM Transactions on Audio, Speech, and Language Processing 24 1: 54-64. 2016
• Lähivaara Timo, Dudley Ward Nicholas F., Huttunen Tomi, Rawlinson Zara, Kaipio Jari P.. 2015. Estimation of aquifer dimensions from passive seismic signals in the presence of material and source uncertainties. Geophysical Journal International 200 3: 1662-1675. 2015
• Pulkkinen Aki, Cox Ben T, Arridge Simon R, Kaipio Jari P, Tarvainen Tanja. 2015. Quantitative photoacoustic tomography using illuminations from a single direction. Journal of Biomedical Optics 20 3: 036015. 2015
• Nissinen A, Kaipio JP, Vauhkonen M, Kolehmainen V. 2015. Contrast enhancement in EIT imaging of the brain. PHYSIOLOGICAL MEASUREMENT 2016; 37 1: 1-24. 2015
• Kaipio JP, Seppänen A, Vauhkonen M, Lipponen A, Voutilainen A, Lehikoinen A, Rimpiläinen V. 2015. Process tomography and estimation of velocity fields (chapter 21). In: Mi Wang (ed.) Industrial Tomography: Systems and Applications. Woodhead publishing. Woodhead Publishing Series in Electronic and Optical Materials. s. 551-590. 2015
• Calvetti Daniela, Hadwin Paul J, Huttunen Janne MJ, Kaipio Jari P, Somersalo Erkki. 2015. Artificial boundary conditions and domain truncation in electrical impedance tomography. Part II: Stochastic extension of the boundary map. INVERSE PROBLEMS AND IMAGING 9 3: 767-789. 2015
• Bardsley Johnathan M, Seppänen Aku, Solonen Antti, Haario Heikki, Kaipio Jari. 2015. Randomize-then-optimize for sampling and uncertainty quantification in electrical impedance tomography. SIAM Journal on Uncertainty Quantification 3 1: 1136-1158. 2015
• Arridge Simon R., Kaipio Jari P., Kolehmainen Ville, Tarvainen Tanja. 2015. Optical Imaging. In: Otmar Scherzer (ed.) Handbook of Mathematical Methods in Imaging. SPRINGER. s. 1033-1079. 2015
• Lähivaara Timo, Dudley Ward Nicholas F., Huttunen Tomi, Kaipio Jari P.. 2014. Statistical inversion approach to estimating water content in an aquifer from seismic data. 2289-2289. 2014
• Rimpiläinen Ville, Kaipio Jari P, Depree Nick, Young Brent R, Wilson David I. 2014. Predicting functional properties of milk powder based on manufacturing data in an industrial-scale powder plant. JOURNAL OF FOOD ENGINEERING 153: 12-19. 2014
• Pulkkinen Aki, Kolehmainen Ville, Kaipio Jari P, Cox Benjamin T, Arridge Simon R, Tarvainen Tanja. 2014. APPROXIMATE MARGINALIZATION OF UNKNOWN SCATTERING IN QUANTITATIVE PHOTOACOUSTIC TOMOGRAPHY. INVERSE PROBLEMS AND IMAGING 8 3: 811-829. 2014
• Pulkkinen A, Cox BT, Arridge SR, Kaipio JP, Tarvainen T. 2014. A Bayesian approach to spectral quantitative photoacoustic tomography. INVERSE PROBLEMS 30 6: 065012. 2014
• Mozumder Meghdoot, Tarvainen Tanja, Kaipio Jari P, Arridge Simon R, Kolehmainen Ville. 2014. Compensation of modeling errors due to unknown domain boundary in diffuse optical tomography. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A 31 8: 1847-1855. 2014
• Mozumder Meghdoot, Tarvainen Tanja, Arridge Simon R, Kaipio Jari, Kolehmainen Ville. 2014. Compensation of optode position and sensitivity errors in diffuse optical tomography: Meghdoot Mozumder, Tanja Tarvainen, Simon R. Arridge, Jari Kaipio, and Ville Kolehmainen, Compensation of optode position and sensitivity errors in diffuse optical tomography. BM3A.76. 2014
• Lähivaara Timo, Seppänen Aku, Kaipio Jari, Vauhkonen Jari, Korhonen Lauri, Tokola Timo, Maltamo Matti. 2014. Bayesian Approach to Tree Detection Based on Airborne Laser Scanning Data. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 52 5: 2690-2699. 2014
• Toivanen Jussi, Tarvainen Tanja, Huttunen Janne, Savolainen Tuomo, Orlande Helcio, Kaipio Jari, Kolehmainen Ville. 2014. 3D thermal tomography with experimental measurement data. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 78: 1126-1134. 2014
• Lähivaara Timo, Dudley Ward Nicholas F., Huttunen Tomi, Kaipio Jari P., Niinimäki Kati. 2014. Estimating pipeline location using ground-penetrating radar data in the presence of model uncertainties. INVERSE PROBLEMS 30 11: 114006. 2014
• Koponen Janne, Huttunen Tomi, Tarvainen Tanja, Kaipio Jari P. 2014. Bayesian approximation error approach in full-wave ultrasound tomography. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 61 10: 1627-1637. 2014
• K. Karhunen, A. Seppänen, J.P. Kaipio. 2014. Adaptive meshing approach to localization of cracks with electrical impedance tomography. INVERSE PROBLEMS AND IMAGING 8 1: 127-148. 2014
• Huttunen JMJ, Kokkonen HT, Jurvelin JS, Töyräs J, Kaipio JP. 2014. Estimation of fixed charge density and diffusivity profiles in cartilage using contrast enhanced computer tomography. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 98 5: 371-390. 2014
• Dudley Ward N, Kaipio JP. 2014. Uncertainty, decision and control: A survey. Journal of Hydrology (New Zealand) 53: 53-91. 2014
• Cui T, Dudley Ward N, Kaipio JP. 2014. Characterization of Parameters for a Spatially Heterogenous Aquifer from Pumping Test Data. Journal of Hydrologic Engineering 19 6: 1203-1213. 2014
• Calvetti D, Kaipio JP Somersalo E. 2014. Inverse problems in the Bayesian framework. INVERSE PROBLEMS 30 11: 110301. 2014
• Abreu LA, Orlande HRB, Kaipio J, Kolehmainen V, Cotta RM, Quaresma NN. 2014. Identification of contact failures in multi-layered composites with the Markov chain Monte Carlo method. Journal of Heat Transfer 136 10: 101302-101302-9.. 2014
• Lähivaara Timo, Dudley Ward Nicholas F, Huttunen Tomi, Koponen Janne, Kaipio Jari P. 2014. Estimation of aquifer dimensions from passive seismic signals with approximate wave propagation models. INVERSE PROBLEMS 30 1: 015003. 2014
• Lähivaara T, Kaipio JP, Dudley Ward NF, Huttunen T. 2013. Simulation study on seismic monitoring of aquifers: -, Proceedings of Meetings on Acoustics. Proceedings of meetings on acoustics Acoustical Society of America 19. -. 2013
• Tarvainen Tanja, Pulkkinen Aki, Cox Ben T, Kaipio Jari P, Arridge Simon R. 2013. Image reconstruction in quantitative photoacoustic tomography using the radiative transfer equation and the diffusion approximation: Ntziachristos Vasilis, Lin Charles P, Proc. SPIE 8800, Opto-Acoustic Methods and Applications. Proceedings of SPIE. 880006. 2013
• Tarvainen Tanja, Pulkkinen Aki, Cox Ben T, Kaipio Jari P, Arridge Simon R. 2013. Bayesian Image Reconstruction in Quantitative Photoacoustic Tomography. IEEE TRANSACTIONS ON MEDICAL IMAGING 32 12: 2287-2298. 2013
• Tarvainen Tanja, Kolehmainen Ville, Lehtikangas Ossi, Arridge Simon R, Kaipio Jari P. 2013. Utilising the coupled radiative transfer - diffusion model in diffuse optical tomography: Taroni P, Dehghani H, Proc. SPIE 8799, Diffuse Optical Imaging IV. Proceedings of SPIE. 879907. 2013
• M. Mozumder, T. Tarvainen, S. R. Arridge, J. P. Kaipio, V. Kolehmainen. 2013. Compensation of optode sensitivity and position errors in diffuse optical tomography using the approximation error approach. Biomedical Optics Express 4 10: 2015-2031. 2013
• Janne Koponen, Tomi Huttunen, Tanja Tarvainen, Jari Kaipio. 2013. Mallinnusvirheiden huomioiminen akustisessa tomografiassa: Hiipakka M, Tahvanainen H, Lokki T, Akustiikkapäivät 2013. Akustiikkapäivät. 255-260. 2013
• Lähivaara T, Kaipio JP, Dudley Ward NF, Huttunen T. 2013. Seisminen menetelmä pohjavesivarojen arviointiin: Hiipakka M, Tahvanainen H, Lokki T, Akustiikkapäivät. Akustiikkapäivät. 105-109. 2013
• Koponen Janne, Huttunen Tomi, Tarvainen Tanja, Kaipio Jari. 2013. Approximation error method for full-wave tomography: -, Proceedings of Meetings on Acoustics, ICA 2013 Montreal.Acoustical Society of America. Proceedings of meetings on acoustics Acoustical Society of America. 075004. 2013
• J. P. Kaipio, V. Kolehmainen. 2013. Approximate marginalization over modeling errors and uncertainties in inverse problems: Paul Damien, Petros Dellaportas, Nicholas G. Polson, David A. Stephens, Bayesian Theory and Applications. 644-672. 2013
• Alavi¿Shoshtari Maryam, Williams David E, Salmond Jennifer A, Kaipio Jari P. 2013. Detection of malfunctions in sensor networks. Environmetrics 24 4: 227-236. 2013
• A. Lipponen, A. Seppänen, J.P. Kaipio. 2013. Electrical impedance tomography imaging with reduced-order model based on proper orthogonal decomposition. JOURNAL OF ELECTRONIC IMAGING 22 2: 023008. 2013
• Voutilainen Arto, Lipponen Antti, Savolainen Tuomo, Lehikoinen Anssi, Vauhkonen Marko, Kaipio Jari P. 2012. Fast Adaptive 3-D Nonstationary Electrical Impedance Tomography Based on Reduced-Order Modeling. IEEE Transactions on Instrumentation and Measurement 61 10: 2665-2681. 2012
• Toivanen Jussi M, Kolehmainen Ville, Tarvainen Tanja, Orlande Helcio RB, Kaipio Jari P. 2012. Simultaneous estimation of spatially distributed thermal conductivity, heat capacity and surface heat transfer coefficient in thermal tomography. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 55: 7958-7968. 2012
• Tarvainen Tanja, Kolehmainen Ville, Arridge Simon R., Kaipio Jari P,. 2012. Utilising approximation error modelling in linear reconstruction in diffuse optical tomography. In: Optical Society of America (ed.) , Biomedical Optics and Digital Holography and Three-Dimensional Imaging. ss. BTu3A.41. 2012
• Tarvainen T, Cox BT, Kaipio JP, Arridge SR. 2012. Reconstructing absorption and scattering distributions in quantitative photoacoustic tomography INVERSE PROBLEMS 28 8: 084009. 2012
• Lähivaara T, Seppänen A, Kaipio J.P, Vauhkonen J, Korhonen L, Tokola T, Maltamo M. 2012. Bayesian approach to tree detection with airborne laser scanning: -, IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2012). 1641-1644. 2012
• Lipponen A, Seppänen A, Kaipio JP. 2012. Model reduction in electrical impedance tomography based on proper orthogonal decomposition, Proceedings of 6th International Symposium on Process Tomography. -. 2012
• Heiskala Juha, Kolehmainen Ville, Tarvainen Tanja, Kaipio Jari P, Arridge Simon R. 2012. Approximation error method can reduce artifacts due to scalp blood flow in optical brain activation imaging. Journal of Biomedical Optics 17 9: 096012. 2012
• Gehre Matthias, Kluth Tobias, Lipponen Antti, Jin Bangti, Seppänen Aku, Kaipio Jari P, Maass Peter. 2012. Sparsity reconstruction in electrical impedance tomography: An experimental evaluation. JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS 236: 2126-2136. 2012
• Kolehmainen, Ville; Schweiger, Martin; Nissilä, Ilkka; Tarvainen, Tanja; Arridge, Simon R.; Kaipio, Jari P.. 2012. Approximation Errors and Model Reduction in Three-Dimensional Diffuse Optical Tomography: -, Biomedical Optics and Digital Holography and Three-Dimensional Imaging.Optical Society of America. BTu3A.5. 2012
• Reunanen J, Mononen M, Vauhkonen M, Lehikoinen A and Kaipio JP. 2011. Machine learning approach for locating phase interfaces using conductivity probes. INVERSE PROBLEMS IN SCIENCE AND ENGINEERING 19 6: 879-902. 2011
• Voutilainen Arto, Lehikoinen Anssi, Vauhkonen Marko, Kaipio Jari. 2011. A reduced-order filtering approach for 3D dynamical electrical impedance tomography MEASUREMENT SCIENCE AND TECHNOLOGY 22 2: 025504. 2011
• Tossavainen O P, Percelay J, Stacey M, Kaipio J P, Bayen A. 2011. State estimation and modeling error approach for 2D shallow water equations and Lagrangian measurements Water Resources Research 47: W10510. 2011
• Tarvainen Tanja, Kolehmainen Ville, Arridge Simon R, Kaipio Jari P. 2011. Image reconstruction in diffuse optical tomography using the coupled radiative transport - diffusion model JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER 112: 2600-2608. 2011
• Simon R. Arridge, Jari P. Kaipio, Ville Kolehmainen and Tanja Tarvainen. 2011. Optical Imaging: O. Scherzer, Handbook of Mathematical Methods in Imaging. Springer Reference. 735-780. 2011
• L. A. Abreu, H. R. B. Orlande, C. P. Naveira-Cotta, J. N. N. Quaresma, R. M. Cotta, J. P. Kaipio and V. Kolehmainen.. 2011. Identification of contact failures in multi-layered composites: n/a, In Proceedings of the ASME 2011 31st International Design Engineering Technical Conferences & Computers and Information in Engineering Conference IDETC/CIE 2011. 479-487. 2011
• Kolehmainen V, Tarvainen T, Arridge S. R. and Kaipio J. P.. 2011. Marginalization of uninteresting distributed parameters in inverse problems - Application to diffuse optical tomography. International Journal for Uncertainty Quantification 1 1: 1-17. 2011
• Kaipio J P, Fox C. 2011. The Bayesian framework for inverse problems in heat transfer Heat Transfer Engineering 32: 718-753. 2011
• Antti Nissinen, Ville Petteri Kolehmainen, Jari P. Kaipio. 2011. Compensation of Modelling Errors Due to Unknown Domain Boundary in Electrical Impedance Tomography. IEEE TRANSACTIONS ON MEDICAL IMAGING 30 2: 231-242. 2011
• Antti Nissinen, Ville Kolehmainen, Jari P. Kaipio. 2011. RECONSTRUCTION OF DOMAIN BOUNDARY AND CONDUCTIVITY IN ELECTRICAL IMPEDANCE TOMOGRAPHY USING THE APPROXIMATION ERROR APPROACH International Journal for Uncertainty Quantification 1 3: 203-222. 2011
• Antti Lipponen, Aku Seppänen, Jari Kaipio. 2011. Nonstationary approximation error approach to imaging of three-dimensional pipe flow: experimental evaluation. MEASUREMENT SCIENCE AND TECHNOLOGY 22 10: 104013 (13pp). 2011
• K. Karhunen, A. Seppänen, A. Lehikoinen, P.J.M. Monteiro and J.P. Kaipio. 2010. Electrical resistance tomography approach for localizing reinforcing bars in concrete: ?, Sixth International Conference on Concrete under Severe Conditions - Environment & Loading (CONSEC'10). ?. 2010
• Tanja Tarvainen, Ville Kolehmainen, Jari P. Kaipio, Simon R. Arridge. 2010. Corrections to linear methods for diffuse optical tomography using approximation error modelling. Biomedical Optics Express 1 1: 209-222. 2010
• Tanja Tarvainen, Ville Kolehmainen, Aki Pulkkinen, Marko Vauhkonen, Martin Schweiger, Simon R. Arridge, and Jari P. Kaipio. 2010. Approximation Error Approach for Compensating Modelling Errors in Optical Tomography: The Optical Society, Biomedical Optics (BIOMED)/ Digital Holography and Three‐Dimensional Imaging (DH) Technical Digest. BSuD48. 2010
• Tanja Tarvainen, Ville Kolehmainen, Aki Pulkkinen, Marko Vauhkonen, Martin Schweiger, Simon R Arridge, Jari P Kaipio. 2010. An approximation error approach for compensating for modelling errors between the radiative transfer equation and the diffusion approximation in diffuse optical tomography INVERSE PROBLEMS 26: 015005 (18pp). 2010
• Ossi Lehtikangas, Tanja Tarvainen, Ville Kolehmainen, Simon R. Arridge, Jari P. Kaipio. 2010. Finite element approximation of the Fokker-Planck equation for diffuse optical tomography. In: (ed.) , Proceeding of the XLIV Annual Conference of the Finnish Physical Society, March 11-13, 2010, Jyväskylä. ss. 81. 2010
• Ossi Lehtikangas, Tanja Tarvainen, Ville Kolehmainen, Aki Pulkkinen, Simon R Arridge, Jari P Kaipio. 2010. Finite Element Solution of the Fokker-Planck Equation for Optical Tomography. In: The Optical Society (ed.) , Biomedical Optics (BIOMED)/ Digital Holography and Three‐Dimensional Imaging (DH) Technical Digest. ss. BSuE1. 2010
• Ossi Lehtikangas, Tanja Tarvainen, Ville Kolehmainen, Aki Pulkkinen, Simon R Arridge, Jari P Kaipio. 2010. Finite element approximation of the Fokker-Planck equation for diffuse optical tomography. JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER 111: 1406-1417. 2010
• K. Karhunen, A. Seppänen, A. Lehikoinen, P.J.M. Monteiro, J.P. Kaipio. 2010. Electrical resistance tomography imaging of concrete. Cement and Concrete Research 40: 137-145. 2010
• A. Lipponen, A. Seppänen and J. P. Kaipio. 2010. Experimental evaluation of state estimation with fluid dynamical models in EIT imaging of 3D pipe flow: -, Proceedings of 6th World Congress on Industrial Process Tomography. -. 2010
• K. Karhunen, A. Seppanen, A. Lehikoinen, J. Blunt, J. P. Kaipio, and P. J. M. Monteiro. 2010. Electrical Resistance Tomography for Assessment of Cracks in Concrete ACI Materials Journal 107 5: 523-531. 2010
• C. Mota, H. R. B. Orlande, M. De Carvalho, V. Kolehmainen and J. P. Kaipio. 2010. Bayesian estimation of temperature dependent thermophysical properties and transient boundary heat flux. Heat Transfer Engineering 31 7: 570-580. 2010
• Antti Nissinen, Ville Kolehmainen, Jari Kaipio. 2010. Compensation of errors due to incorrect model geometry in electrical impedance tomography. In: IOP (ed.) , XIV International Conference on Electrical Bioimpedance and 11th Conference on Biomedical Applications of Electrical Impedance Tomography (ICEBI & EIT 2010). Journal of physics: conference series. ss. 012050. 2010
• Antti Lipponen, Aku Seppänen, Jari Kaipio. 2010. Reduced-order estimation of nonstationary flows with electrical impedance tomography. INVERSE PROBLEMS 26: 074010 (20pp). 2010
• Antti Lipponen, Aku Seppänen, Jari Hämäläinen, Jari Kaipio. 2010. Nonstationary inversion of convection-diffusion problems - recovery from unknown nonstationary velocity fields. INVERSE PROBLEMS AND IMAGING 4 3: 463-483. 2010
• A. Seppänen, K. Karhunen, A. Lehikoinen, J. Blunt, J.P. Kaipio, P.J.M. Monteiro. 2010. Electrical Resistance Tomography for non-destructive evaluation of concrete structures: -, Proceedings of 6th World Congress on Industrial Process Tomography. 662-669. 2010
• A. Lipponen, A. Seppänen and J. P. Kaipio. 2010. Reduced order estimation of nonstationary flows with electrical impedance tomography. In: - (ed.) , Proceedings of 17th Australasian Fluid Mechanics Conference. ss. -. 2010
• Huttunen JMJ, Lehikoinen A, Hämäläinen J, Kaipio JP. 2010. Importance filtering approach for the nonstationary approximation error method. INVERSE PROBLEMS 26: 125003. 2010
• Mota C, Orlande H R B, Wellelle O, Kolehmainen V and Kaipio J P. 2009. Inverse problem of simultaneous identification of thermophysical properties and boundary heat flux High Temperatures ¿ High Pressures 38: 171-185. 2009
• Voutilainen A, Kaipio JP. 2009. Model reduction and pollution source identification from remote sensing data. INVERSE PROBLEMS AND IMAGING 3 4: 711-730. 2009
• Seppänen A, Karhunen K, Lehikoinen A, Kaipio JP. 2009. Electrical resistance tomography imaging of concrete: Alexander MG et al, Concrete Repair, Rehabilitation and Retrofitting II.CRC Press. Taylor & Francis Group. 571-577. 2009
• Nissinen A, Heikkinen LM, Kolehmainen V, Kaipio JP. 2009. Compensation of errors due to discretization, domain truncation and unknown contact impedances in electrical impedance tomography. MEASUREMENT SCIENCE AND TECHNOLOGY 20: 105504 (13 s.). 2009
• Seppänen A, Voutilainen A, Kaipio JP. 2009. State estimation in process tomography - reconstruction of velocity fields using EIT. INVERSE PROBLEMS 25 8: [24 pp]. 2009
• Lipponen A, Seppänen A, Kaipio JP. 2009. Non-stationary inversion with convection-diffusion models - approximation errors induced by non-steady-state flow fields. In: (ed.) , 3rd International Workshop on Process tomography (IWPT-3). ss. 2009
• Lipponen A, Seppänen A, Kaipio JP. 2009. Estimation of non-stationary velocity fields using electrical impedance tomography. In: (ed.) , What Where When, Multi-dimensional Advances for Industrial Process Monitoring. ss. 2009
• Kolehmainen V, Schweiger M, Nissilä I, Tarvainen T, Arridge SR, Kaipio JP. 2009. Approximation errors and model reduction in three-dimensional diffuse optical tomography. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A 26 10: 2257-2268. 2009
• Karhunen K, Seppänen A, Lehikoinen A, Kaipio JP, Monteiro PJM. 2009. Locating reinforcing bars in concrete with Electrical Resistance Tomography: Alexander MG et al, Concrete Repair, Rehabilitation and Retrofitting II.CRC Press. Taylor & Francis Group. 563-569. 2009
• Huttunen JMJ, Kaipio JP. 2009. Model reduction in state identification problems with an application to determination of thermal parameters APPLIED NUMERICAL MATHEMATICS 59: 877-890. 2009
• Tarvainen T, Vauhkonen M, Kolehmainen V, Kaipio JP, Arrige SR. 2008. Utilizing the radiative transfer equation in optical tomography PIERS ONLINE 4 6: 655-660. 2008
• Tarvainen T, Vauhkonen M, Kolehmainen V, Kaipio JP, Arridge SR. 2008. Utilizing the Radiative Transfer Equation in Optical Tomography, PIERS Proseedings. 730-735. 2008
• Seppänen A, Vauhkonen M, Vauhkonen PJ, Voutilainen A, Kaipio JP. 2008. State estimation in process tomography - three-dimensional impedance imaging of moving fluids. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 73: 1651-1670. 2008
• Seppänen A, Karhunen K, Lehikoinen A, Monteiro P, Kaipio JP. 2008. Adaptive meshing approach to locating internal metals with electrical resistance tomography, WCCM8: 8th. World Congress on Computational Mechanics. ECCOMAS 2008: 5th. European Congress on Computational Methods in Applied Science and Engineering. 2 s. 2008
• Nissinen A, Heikkinen LM, Kaipio JP. 2008. The Bayesian approximation error approach for electrical impedance tomography - experimental results. MEASUREMENT SCIENCE AND TECHNOLOGY 19 015501: 9 s. 2008
• Lähivaara T, Malinen M, Kaipio JP & Huttunen T. 2008. Computational aspects of the discontinuous Galerkin method for the wave equation. JOURNAL OF COMPUTATIONAL ACOUSTICS 16: 507-530. 2008
• Karhunen K, Seppänen A, Lehikoinen A, Monteiro P, Kaipio JP. 2008. Crack identification in concrete with electrical resistance tomography, WCCM8: 8th World Congress on Computational Mechanics. ECCOMAS 2008: 5th European Congress on Computational Methods in Applied Sciences and Engineering. 2 s. 2008
• Huttunen T, Kaipio JP, Monk P. 2008. An ultra-weak method for acoustic fluid-solid interaction. JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS 213: 166-185. 2008
• Voutilainen A, Pyhälahti T, Kallio KY, Pulliainen J, Haario H, Kaipio JP. 2007. A filtering approach for estimating lake water quality from remote sensing data. INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 9: 50-64. 2007
• Seppänen A, Heikkinen L, Savolainen T, Voutilainen A, Somersalo E, Kaipio JP. 2007. An experimental evaluation of state estimation with fluid dynamical models in process tomography. CHEMICAL ENGINEERING JOURNAL 127: 23-30. 2007
• S. Siltanen, E. Somersalo, V. Kolehmainen, M. Lassas and J. P. Kaipio. 2007. Method and arrangement for medical X-ray imaging and reconstruction from sparse data. US 7269241 B2. United States of America. 2007
• Nissinen A, Heikkinen LM, Kaipio JP. 2007. Approximation errors in electrical impedance tomography - an experimental study [CD-ROM], 5th World Congress on Industrial Process Tomography. 858-864. 2007
• Lehikoinen A, Finsterle S, Voutilainen A, Heikkinen LM, Vauhkonen M, Kaipio JP. 2007. Approximation errors and truncation of computational domains with application to geophysical tomography. INVERSE PROBLEMS AND IMAGING 1 2: 371-389. 2007
• Lehikoinen A, Finsterle S, Huttunen JMJ, Voutilainen A, Kowalsky MB, Kaipio JP. 2007. A filtering approach for hydrological process monitoring with approximation error method [CD-ROM], 5th World Congress on Industrial Process Tomography. 994-1001. 2007
• Kolehmainen V, Vanne A, Siltanen S, Järvenpää S, Kaipio JP, Lassas M, Kalke M. 2007. Bayesian inversion method for 3D dental X-ray imaging ELEKTROTECHNIK UND INFORMATIONSTECHNIK 127 7-8: 248-253. 2007
• Kolehmainen V, Kaipio JP, Orlande HRB. 2007. Reconstruction of thermal conductivity and heat capacity using a tomographic approach. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 50: 5150-5160. 2007
• Kaipio J, Somersalo E. 2007. Statistical inverse problems: discretization, model reduction and inverse crimes. JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS 198 2: 493-504. 2007
• J. P. Kaipio, S. Siltanen, M. Kalke, V. Kolehmainen and M. Lassas. 2007. Method and arrangement for three-dimensional medical X-ray imaging. US 7274766 B2. United States of America. 2007
• Huttunen JMJ, Kaipio JP. 2007. Approximation errors in nonstationary inverse problems. INVERSE PROBLEMS AND IMAGING 1 1: 77-93. 2007
• Huttunen JMJ, Kaipio JP. 2007. Approximation error analysis in nonlinear state estimation with an application to state-spase identification. INVERSE PROBLEMS 23: 2141-2157. 2007
• Kaipio JP, Seppänen A, Voutilainen A, Haario H. 2007. Optimal current patterns in dynamical electrical impedance tomography imaging. INVERSE PROBLEMS 23: 1201-1214. 2007
• Malinen M, Duncan SR, Huttunen T, Kaipio JP. 2006. Feedforward and feedback control of ultrasound surgery. APPLIED NUMERICAL MATHEMATICS 56: 55-79. 2006
• Vauhkonen M., Tarvainen T., Kolehmainen V., Kaipio J.. 2006. Finite element approximations for the radiative transfer equation, Biomedical Optics 2006. 2006
• V. Kolehmainen, S. R. Arridge, J. P. Kaipio, M. Schweiger, E. Somersalo, T. Tarvainen and M. Vauhkonen. 2006. Approximation Errors and Model Reduction in Optical Tomography: n/a, Engineering in Medicine and Biology Society, 2006. EMBS '06. 28th Annual International Conference of the IEEE.IEEE. 2659 - 2662. 2006
• Tarvainen T., Vauhkonen M., Kolehmainen V., Kaipio J.. 2006. Modeling photon migration in tissues with the coupled rediative transfer equation and diffusion approximation. In: (ed.) , Biomedical Optics 2006. ss. 2006
• Tarvainen T, Vauhkonen M, Kolehmainen V, Kaipio JP. 2006. Finite element model for the coupled radiative transfer equation and diffusion approximation. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 65: 383-405. 2006
• S. Siltanen, E. Somersalo, V. Kolehmainen, M. Lassas and J. P. Kaipio. 2006. Lääketieteellinen röntgenkuvauksen menetelmä ja järjestely. Finland. 2006
• Ruuskanen AR, Seppänen A, Kaipio JP. 2006. Optimal actuator placement for controlling concentration profiles via process tomography. INVERSE PROBLEMS IN SCIENCE AND ENGINEERING 14 8: 819-836. 2006
• Ruuskanen AR, Seppänen A, Duncan S, Somersalo E, Kaipio JP. 2006. Using process tomography as a sensor for optimal control APPLIED NUMERICAL MATHEMATICS 56: 37-54. 2006
• Kolehmainen V, Vanne A, Siltanen S, Järvenpää S, Kaipio JP, Lassas M, Kalke M. 2006. Parallelized Bayesian inversion for three-dimensional dental x-ray imaging. IEEE TRANSACTIONS ON MEDICAL IMAGING 25 2: 218-228. 2006
• Huttunen JMJ, Huttunen T, Malinen M, Kaipio JP. 2006. Determination of heterogeneous thermal parameters using ultrasound induced heating and MR thermal mapping. PHYSICS IN MEDICINE AND BIOLOGY 51: 1011-1032. 2006
• Heikkinen LM, Kourunen J, Savolainen T, Vauhkonen PJ, Kaipio JP, Vauhkonen M. 2006. Real time three-dimensional electrical impedance tomography applied in multiphase flow imaging. MEASUREMENT SCIENCE AND TECHNOLOGY 17: 2083-2087. 2006
• Diamond SG, Huppert TJ, Kolehmainen V, Franceschini MA, Kaipio JP, Arridge SR, Boas DA. 2006. Dynamic physiological modeling for functional diffuse optical tomography. NEUROIMAGE 30: 88-101. 2006
• Calvetti D, Kaipio JP, Someralo E. 2006. Aristotelian prior boundary conditions INTERNATIONAL JOURNAL OF MATHEMATICS AND COMPUTER SCIENCE 1: 63-81. 2006
• Arridge SR, Kaipio JP, Kolehmainen V, Schweiger M, Somersalo E, Tarvainen T, Vauhkonen M. 2006. Approximation errors and model reduction with an application in optical diffusion tomography INVERSE PROBLEMS 22: 175-195. 2006
• Arridge SR, Dorn O, Kaipio JP, Kolehmainen V, Schweiger M, Tarvainen T, Vauhkonen M, Zacharopoulos A. 2006. Reconstruction of subdomain boundaries of piecewise constant coefficients of the radiative transfer equation from optical tomography data. INVERSE PROBLEMS 22: 2175-2196. 2006
• Kaipio Jari. 2006. Tilastolliset inversio-ongelmat ja mallinnukseen liittyvät ongelmat. ARKHIMEDES 2: 15-18. 2006
• Tarvainen T, Vauhkonen M, Kolehmainen V, Arridge SR, Kaipio JP. 2005. Coupled radiative transfer equation and diffusion approximation model for photon migration in turbid medium with low-scattering and non-scattering regions PHYSICS IN MEDICINE AND BIOLOGY 50: 4913-4930. 2005
• Solomon Gilbert Diamond, Theodore J. Huppert, Ville Kolehmainen, Maria Angela Franceschini and Jari P. Kaipio. 2005. Physiological System Identification with the Kalman Filter in Diffuse Optical Tomography: J Duncan and G Gerig, , Medical Image Computing and Computer-Assisted Intervention ¿ MICCAI 2005.Springer-Verlag. Lecture Notes in Computer Science 3750. 649-656. 2005
• Tarvainen T, Kolehmainen V, Vauhkonen M, Vanne A, Gibson AP, Schweiger M, Arridge SR, Kaipio JP. 2005. Computational calibration method for optical tomography. APPLIED OPTICS 44 10: 1879-1888. 2005
• Malinen M., Duncan S.R., Huttunen T., Kaipio J.P.. 2005. Feedfforward and feedback control of ultrasound surgery. APPLIED NUMERICAL MATHEMATICS 56: 55-79. 2005
• Tarvainen T, Vauhkonen M, Kolehmainen V, Kaipio JP. 2005. Coupled radiative transfer equation and diffusion approximation: Licha K, Cubeddu R, ECBO 2005 - European Conferences on Biomedical Optics.International Society for Optical Engineering, OSA. Proceedings of SPIE. 262-270. 2005
• Tarvainen T, Vauhkonen M, Kolehmainen V, Kaipio JP. 2005. Hybrid radiative-transfer-diffusion model for optical tomography. APPLIED OPTICS 44 6: 876-886. 2005
• Vauhkonen PJ, Vauhkonen M, Seppänen A, Kaipio JP. 2005. Iterative image reconstruction in three-dimensional electrical impedance tomography. In: Colaco MJ, Orlande HRB, Dulikravich GS (ed.) , Inverse problems, design and optimization Volume I. Inverse problems, design and optimization symposium.. ss. 152-159. 2005
• Voutilainen A., Kaipio JP. 2005. Sequential Monte Carlo estimation of aerosol size distributions COMPUTATIONAL STATISTICS & DATA ANALYSIS 48: 887-908. 2005
• Ruuskanen AR, Seppänen A, Somersalo E, Kaipio JP. 2005. The effect of linearizing the EIT observation model in concentration control problems. In: Jong de A, Takei M, Williams RA, ,Zeidan M (ed.) , Proceedings of 4th World Congress on Industrial Process Tomography.Virtual Centre for Industrial Process Tomography. ss. 873-878. 2005
• Duncan S, Kaipio J, Ruuskanen AR, Malinen M, Seppänen A. 2005. Control systems: Scott DM, McCann H, Process Imaging for Automatic Control.Taylor & Francis. 237-262. 2005
• Malinen M, Huttunen T, Kaipio JP. 2005. Optimization and control methods for ultrasound surgery, Proceedings of COBEM 2005. 18th International Congress of Mechanical Engineering. 2005
• Kaipio JP, Duncan S, Seppänen A, Somersalo E, Voutilainen A.. 2005. State estimation: Scott DM, McCann H, Process Imaging for Automatic Control.Taylor & Francis. 207-235. 2005
• Kaipio J.P., Duncan S., Seppänen A., Somersalo E., Voutilainen A.. 2005. Process imaging for automatic control, Boca ration: Taylor & Francis. 207-235. 2005
• Huttunen T, Malinen M, Kaipio JP, White PJ, Hynynen K. 2005. A full-wave Helmholtz model for continuous-wave ultrasound transmission IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 52 3: 397-409. 2005
• Heino J, Somersalo E., Kaipio JP. 2005. Compensation for geometric mismodelling by anisotropies in optical tomography OPTICS EXPRESS: THE INTERNATIONAL ELECTRONIC JOURNAL OF OPTICS 13 1: 296-308. 2005
• Heikkinen LM, Kourunen J, Rastas J, Savolainen T, Vauhkonen PJ, Kaipio JP. 2005. Real time three-dimensional electrical impedance tomography applied in multiphase flow imaging: 540-545. 2005
• Heikkinen LM, Kourunen J, Rastas J, Savolainen T, Vauhkonen PJ, Kaipio JP, Vauhkonen M. 2005. Real time three-dimensional electrical impedance tomography applied in multiphase flow imaging, Proceedings of the 4th World Congress on Industrial Process Tomography. 540-545. 2005
• Duncan S., Kaipio J., Ruuskanen A.R., Malinen M., Seppänen A.. 2005. Process imaging for automatic control, Boca ration: Taylor & Francis. 237-262. 2005
• Malinen M, Huttunen T, Kaipio JP, Hynynen K. 2005. Scanning path optimization for ultrasound surgery. PHYSICS IN MEDICINE AND BIOLOGY 50: 3473-3490. 2005
• Vauhkonen M, Vilhunen T, Kolehmainen V, Kaipio JP. 2004. Utilizing the radiative transfer equation in optical tomography, OSA Biomedical Optics, Topical Meetings.Optical Society of America. WF48. 2004
• Voutilainen A, Kaipio JP, Pekkanen J, Timonen KL, Ruuskanen J. 2004. Theoretical analysis of the influence of aerosol size distribution and physical activity on particle deposition pattern in human lungs SCANDINAVIAN JOURNAL OF WORK, ENVIRONMENT AND HEALTH. SUPPLEMENT 30 2: 73-79. 2004
• Vilhunen T, Kolehmainen V, Vauhkonen M, Vanne A, Kaipio JP, Gibson A, Schweiger M, Arridge SR. 2004. Computational calibration method for optical tomography. In: - (ed.) , OSA Biomedical Optics, Topical meetings [CD-ROM]. ss. -. 2004
• Kaipio JP, Seppänen A, Somersalo E, Haario H. 2004. Posterior covariance releted optimal current patterns in electrial impedance tomography. INVERSE PROBLEMS 20: 919-936. 2004
• Statistical and Computational Inverse Problems. Kaipio J., Somersalo E.. 2004 2004
• Malinen M, Huttunen T, Hynynen K, Kaipio JP. 2004. Simulation study for thermal dose optimization in ultrasound surgery of the breast. MEDICAL PHYSICS 31 5: 1296-1307. 2004
• Huttunen T, Monk P, Collino F, Kaipio JP. 2004. The ultra-weak variational formulation for elastic wave problems. SIAM JOURNAL ON SCIENTIFIC COMPUTING 25 5: 1717-1742. 2004
• Huttunen T, Kaipio JP, Monk P. 2004. The perfectly matched layer for the ultra weak variational formulation of the 3D Helmholtz equation. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 61: 1072-1092. 2004
• Ranta-Aho PO, Koistinen AS, Ollikainen JO, Kaipio JP, Partanen J, Karjalainen PA. 2003. Single-trial estimation of multichannel evoked-potential measurements. IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING 50 2: 189-196. 2003
• Vilhunen T, Kolehmainen V, Vauhkonen M, Kaipio JP. 2003. A source model for optical diffusion tomography, Proceedings of 3rd World Congress on Industrial Process Tomography.The Virtual Centre for Industrial Process Tomography. 110-114. 2003
• Siltanen S, Kolehmainen V, Järvenpää S, Kaipio JP, Koistinen P, Lassas M, Pirttilä J, Somersalo E. 2003. Statistical inversion for medical x-ray tomography with few radiographs: I. General theory. PHYSICS IN MEDICINE AND BIOLOGY 48: 1437-1463. 2003
• Seppänen A, Heikkinen L, Savolainen T, Somersalo E, Kaipio JP. 2003. An experimental evaluation of state estimation with fluid dynamical models in process tomography, Proceedings of 3rd World Congress on Industrial Process Tomography.The Virtual Centre for Industrial Process Tomography. 541-546. 2003
• Savolainen T, Heikkinen LM, Vauhkonen M, Kaipio JP. 2003. A modular, adaptive electrical impedance tomography system, Proceedings of 3rd World Congress on Industrial Process Tomography.The Virtual Centre for Industrial Process Tomography. 50-55. 2003
• Ruuskanen AR, Seppänen A, Duncan S, Somersalo E, Kaipio JP. 2003. Optimal control in process tomography, Proceedings of 3rd World Congress on Industrial Process Tomography.The Virtual Centre for Industrial Process Tomography. 245-251. 2003
• Somersalo E, Voutilainen A, Kaipio JP. 2003. Non-stationary magnetoencephalography by Bayesian filtering of dipole models. INVERSE PROBLEMS 19: 1047-1063. 2003
• Prince S, Kolehmainen V, Kaipio JP, Franceschini MA, Boas D, Arridge SR. 2003. Time-series estimation of biological factors in optical diffusion tomography. PHYSICS IN MEDICINE AND BIOLOGY 48: 1491-1504. 2003
• Malinen M, Huttunen T, Kaipio JP. 2003. An optimal control approach for ultrasound induced heating. INTERNATIONAL JOURNAL OF CONTROL 76 3: 1323-1336. 2003
• Kolehmainen V, Siltanen S, Järvenpää S, Kaipio JP, Koistinen P, Lassas M, Pirttilä J, Somersalo E. 2003. Statistical inversion for medical x-ray tomography with few radiographs: II. Application to dental radiology. PHYSICS IN MEDICINE AND BIOLOGY 48: 1465- 1490. 2003
• Kolehmainen V, Prince S, Arridge SR, Kaipio JP. 2003. State-estimation approach to the nonstationary optical tomography problem. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A 20 5: 876-889. 2003
• Huttunen T, Kaipio JP, Hynynen K. 2003. Modeling of anomalies due to hydrophones in continuous-wave ultrasound fields. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 50 11: 1486-1500. 2003
• Kaipio JP, Seppänen A, Somersalo E, Haario H. 2003. Statistical inversion approach for optimizing current patterns in EIT, Proceedings of 3rd World Congress on Industrial Process Tomography.The Virtual Centre for Industrial Process Tomography. 683-688. 2003
• Malinen M, Huttunen T, Kaipio JP. 2003. Thermal dose optimization method for ultrasound surgery. PHYSICS IN MEDICINE AND BIOLOGY 48: 745-762. 2003
• Vilhunen T, Vauhkonen M, Kolehmainen V, Kaipio JP. 2002. Linking the radiative transfer equation and the diffusion approximation, OSA Biomedical Topical Meetings.Optical Society of America. 12-14. 2002
• Voutilainen A, Kaipio JP. 2002. Estimation of time-varying aerosol size distributions - exploitation of modal aerosol dynamical models. JOURNAL OF AEROSOL SCIENCE 33: 1181-1200. 2002
• Vilhunen T, Kaipio JP, Vauhkonen PJ, Savolainen T, Vauhkonen M. 2002. Simultaneous reconstruction of electrode contact impedances and internal electrical properties: I. Theory. MEASUREMENT SCIENCE AND TECHNOLOGY 13: 1848-1854. 2002
• Vilhunen T, Heikkinen LM, Savolainen T, Vauhkonen PJ, Lappalainen R, Kaipio JP, Vauhkonen M. 2002. Detection of faults in resistive coatings with an impedance-tomography-related approach. MEASUREMENT SCIENCE AND TECHNOLOGY 13: 865-872. 2002
• Kaipio JP, Somersalo E. 2002. Estimating anomalies from indirect observations. JOURNAL OF COMPUTATIONAL PHYSICS 181: 398-406. 2002
• Huttunen T, Monk P, Kaipio JP. 2002. Computational aspects of the ultra-weak variational formulation. JOURNAL OF COMPUTATIONAL PHYSICS 182: 27-46. 2002
• Seppänen A, Vauhkonen M, Vauhkonen PJ, Somersalo E, Kaipio JP. 2001. State estimation with fluid dynamical evolution models in process tomography - an application to impedance tomography. INVERSE PROBLEMS 17: 467-483. 2001
• Voutilainen A, Kolehmainen V, Stratmann F, Kaipio JP. 2001. Computational methods for the estimation of aerosol size distributions: Uvarova LA, Latyshev AV, Mathematical Modeling. Problems, Methods, Applications.Kluwer Academic. 219-230. 2001
• Voutilainen A, Kolehmainen V, Kaipio JP. 2001. Statistical inversion of aerosol size measurement data. INVERSE PROBLEMS IN SCIENCE AND ENGINEERING 9: 67-94. 2001
• Voutilainen A, Kaipio JP. 2001. Estimation of non-stationary aerosol size distributions using the state-space approach. JOURNAL OF AEROSOL SCIENCE 32: 631-648. 2001
• Vauhkonen PJ, Vauhkonen M, Kaipio JP. 2001. Fixed-lag smoothing and state estimation in dynamic electrical impedance tomography INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 50: 2195-2209. 2001
• Vauhkonen M, Lionheart WRB, Heikkinen LM, Vauhkonen PJ, Kaipio JP. 2001. A MATLAB package for the EIDORS project to reconstruct two-dimensional EIT images. PHYSIOLOGICAL MEASUREMENT 22: 107-111. 2001
• Tarvainen M, Vauhkonen M, Savolainen T, Kaipio JP. 2001. Boundary element method and internal electrodes in electrical impedance tomography. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 50: 809-824. 2001
• Lionheart WRB, Kaipio J, McLeod CN. 2001. Generalized optimal current patterns and electrical safety in EIT PHYSIOLOGICAL MEASUREMENT 22: 85-90. 2001
• Seppänen A, Vauhkonen M, Vauhkonen PJ, Somersalo E, Kaipio JP. 2001. State estimation in three dimensional impedance imaging - use of fluid dynamical evolution models. In: (ed.) , 2nd World Congress on Industrial Process Tomography.The Virtual Centre for Industrial Process Tomography. ss. 198-206. 2001
• Seppänen A, Vauhkonen M, Vauhkonen P, Somersalo E, Kaipio JP. 2001. Fluid dynamical models and state estimation in process tomography: Effect due to inaccuracies in flow fields. JOURNAL OF ELECTRONIC IMAGING 10 3: 630-640. 2001
• Seppänen A, Vauhkonen M, Somersalo E, Kaipio JP. 2001. State space models in process tomography - approximation of state noise covariance. INVERSE PROBLEMS IN SCIENCE AND ENGINEERING 9: 561-585. 2001
• Ollikainen JO, Vauhkonen M, Karjalainen PA, Kaipio JP. 2001. A new computational approach for cortical imaging. IEEE TRANSACTIONS ON MEDICAL IMAGING 20 4: 325-332. 2001
• Kolehmainen V, Voutilainen A, Kaipio JP. 2001. Estimation of non-stationary region boundaries in EIT-state estimation approach. INVERSE PROBLEMS 17: 1937-1956. 2001
• Heikkinen LM, Vauhkonen M, Savolainen T, Leinonen K, Kaipio JP. 2001. Electrical process tomography with known internal structures and resistivities. INVERSE PROBLEMS IN SCIENCE AND ENGINEERING 9: 431-454. 2001
• Heikkinen LM, Vauhkonen M, Savolainen T, Kaipio JP. 2001. Utilizing internal electrodes in volume fraction estimation by electrical process tomography, 2nd World Congress on Industrial Process Tomography.The Virtual Centre for Industrial Process Tomography. 191-197. 2001
• Heikkinen LM, Vauhkonen M, Savolainen T, Kaipio JP. 2001. Modelling of internal structures and electrodes in electrical process tomography. MEASUREMENT SCIENCE AND TECHNOLOGY 12: 1012-1019. 2001
• Voutilainen A, Stratmann F, Kaipio JP. 2000. A non-homogeneous regularization method for the estimation of narrow aerosol size distributions. JOURNAL OF AEROSOL SCIENCE 31 12: 1433-1445. 2000
• Voutilainen A, Kolehmainen V, Kaipio JP. 2000. Statistical inversion of aerosol size distribution data, Abstracts of the 2000 European Aerosol Conference.Pergamon. Journal of Aerosol Science. Supplement. 767-768. 2000
• Voutilainen A, Kaipio JP. 2000. Dynamical estimation of aerosol size distributions. In: (ed.) , Abstracts of the 2000 European Aerosol Conference.Pergamon. Journal of Aerosol Science. Supplement. ss. 769-770. 2000
• Vauhkonen PJ, Vauhkonen M, Mäkinen T, Karjalainen PA, Kaipio JP. 2000. Dynamic electrical impedance tomography - phantom studies. INVERSE PROBLEMS IN SCIENCE AND ENGINEERING 8: 495-510. 2000
• Tervo J, Vauhkonen M, Vauhkonen PJ, Kaipio JP. 2000. A three-dimensional finite element model for the control of certain non-linear bioreactors. MATHEMATICAL METHODS IN THE APPLIED SCIENCES 23: 357-377. 2000
• Vauhkonen M, Lionheart WRB, Heikkinen LM, Vauhkonen PJ, Kaipio JP. 2000. A Matlab Toolbox for the EIDORS project to reconstruct two- and three-dimensional EIT images. In: (ed.) , 2nd EPSRC Engineering Network Meeting. Biomedical Applications of EIT. Scientific Abstracts. ss. [4 p.]. 2000
• Vauhkonen PJ, Vauhkonen M, Kaipio JP. 2000. Errors due to the truncation of the computational domain in static three-dimensional electrical impedance tomography. PHYSIOLOGICAL MEASUREMENT 21: 125-135. 2000
• Seppänen A, Vauhkonen M, Somersalo E, Kaipio JP. 2000. Effects of inaccuracies in fluid dynamical models in state estimation of process tomography: McCann H, Scott DM, Process Imaging for Automatic Control. Proceedings of SPIE.SPIE-The International Society for Optical Engineering. 69-80. 2000
• Ollikainen JO, Vauhkonen M, Karjalainen PA, Kaipio JP. 2000. Effects of electrode properties on EEG measurements and a related inverse problem. MEDICAL ENGINEERING & PHYSICS 22: 535-545. 2000
• Kolehmainen V, Vauhkonen M, Kaipio JP, Arridge SR. 2000. Recovery of piecewise constant coefficients in optical diffusion tomography [online]. OPTICS EXPRESS: THE INTERNATIONAL ELECTRONIC JOURNAL OF OPTICS 7 13: 468-480. 2000
• Kolehmainen V, Arridge SR, Vauhkonen M, Kaipio JP. 2000. Simultaneous reconstruction of internal tissue region boundaries and coefficients in optical diffusion tomography. PHYSICS IN MEDICINE AND BIOLOGY 45: 3267-3283. 2000
• Kaipio JP, Kolehmainen V, Somersalo E, Vauhkonen M. 2000. Statistical inversion and Monte Carlo sampling methods in electrical impedance tomography. INVERSE PROBLEMS 16: 1487-1522. 2000
• Kaipio JP, Karjalainen PA, Juntunen M. 2000. Perturbation expansions in polynomial root tracking. SIGNAL PROCESSING 80: 515-523. 2000
• Juntunen M, Kaipio JP. 2000. Stabilization of smoothness priors time-varying autoregressive models. CIRCUITS, SYSTEMS AND SIGNAL PROCESSING 19 5: 423-435. 2000
• Ranta-aho PO, Karjalainen PA, Koistinen AS, Kaipio J, Partanen J. 2000. Comparison of amplitude estimates in the single trial estimation of evoked potentials, Digest of Papers of the 2000 World Congress on Medical Physics and Biomedical Engineering and the Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society [CD-ROM]. 2000
• Kolehmainen V, Arridge SR, Lionheart WRB, Kaipio JP. 1999. Recovery of organ boundaries in optical tomography, Proceedings of the First Joint BMES/EMBS Conference. Serving Humanity. Advancing Technology. 1090. 1999
• Voutilainen A, Stratmann F, Kaipio JP. 1999. A new data inversion algorithm for DMPS and TDMA measurements. JOURNAL OF AEROSOL SCIENCE. SUPPLEMENT 30: S775-S776. 1999
• Vauhkonen PJ, Vauhkonen M, Savolainen T, Kaipio JP. 1999. Three-dimensional electrical impedance tomography based on the complete electrode model IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING 46 9: 1150-1160. 1999
• Vauhkonen PJ, Vauhkonen M, Savolainen T, Kaipio JP. 1999. Static three-dimensional electrical impedance tomography. ANNALS OF THE NEW YORK ACADEMY OF SCIENCES 873: 472-481. 1999
• Tervo J, Kolmonen P, Vauhkonen M, Heikkinen LM, Kaipio JP. 1999. A finite-element model of electron transport in radiation therapy and a related inverse problem INVERSE PROBLEMS 15: 1345-1361. 1999
• Ollikainen JO, Vauhkonen M, Karjalainen PA, Kaipio JP. 1999. Effects of local skull inhomogeneities on EEG source estimation. MEDICAL ENGINEERING & PHYSICS 21: 143-154. 1999
• Kolehmainen V, Arridge SR, Lionheart WRB, Vauhkonen M, Kaipio JP. 1999. Recovery of region boundaries of piecewise constant coefficients of an elliptic PDE from boundary data. INVERSE PROBLEMS 15: 1375-1391. 1999
• Karjalainen PA, Kaipio JP, Koistinen AS, Vauhkonen M. 1999. Subspace regularization method for the single-trial estimation of evoked potentials. IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING 46 7: 849-860. 1999
• Karjalainen PA, Kaipio JP, Kolehmainen V, Koistinen AS, Partanen J. 1999. Regularization approach to the single trial estimation of multi channel evoked potentials, Proceedings of the First Joint BMES/EMBS Conference. Serving Humanity. Advancing Technology. 423. 1999
• Kaipio JP, Kolehmainen V, Vauhkonen M, Somersalo E. 1999. Inverse problems with structural prior information INVERSE PROBLEMS 15: 713-729. 1999
• Kaipio JP, Karjalainen PA, Somersalo E, Vauhkonen M. 1999. State estimation in time-varying electrical impedance tomography. ANNALS OF THE NEW YORK ACADEMY OF SCIENCES 873: 430-439. 1999
• Kaipio J, Somersalo E. 1999. Nonstationary inverse problems and state estimation JOURNAL OF INVERSE AND ILL-POSED PROBLEMS 7 3: 273-282. 1999
• Juntunen M, Tervo J, Kaipio JP. 1999. Stabilization of Subba Rao-Liporace models. CIRCUITS, SYSTEMS AND SIGNAL PROCESSING 18 4: 395-406. 1999
• Juntunen M, Kaipio JP. 1999. A strategy for selecting measurement points in the determination of depth-dose curves and dose profiles MEASUREMENT SCIENCE AND TECHNOLOGY 10: 765-771. 1999
• Hiltunen JK, Karjalainen PA, Partanen J, Kaipio JP. 1999. Estimation of the dynamics of event-related desynchronisation changes in electroencephalograms. MEDICAL AND BIOLOGICAL ENGINEERING AND COMPUTING 37: 309-315. 1999
• Kolehmainen V, Somersalo E, Vauhkonen PJ, Vauhkonen M, Kaipio JP. 1998. A Bayesian approach and total variation priors in 3D Electrical Impedance Tomography: Chang HK, Zhang YT, Biomedical Engineering Towards the Year 2000 and Beyond. Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society.IEEE. 1028-1031. 1998
• Vauhkonen PJ, Vauhkonen M, Savolainen T, Kaipio JP. 1998. Static three dimensional electrical impedance tomography, Proceedings of the X. International Conference on Electrical Bio-impedance.Universitat Politecnica de Catalunya. 411-414. 1998
• Vauhkonen M, Vadász D, Karjalainen PA, Somersalo E, Kaipio JP. 1998. Tikhonov regularization and prior information in electrical impedance tomography. IEEE TRANSACTIONS ON MEDICAL IMAGING 17 2: 285-293. 1998
• Vauhkonen M, Karjalainen PA, Kaipio JP. 1998. A Kalman filter approach to track fast impedance changes in electrical impedance tomography. IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING 45 4: 486-493. 1998
• Vauhkonen M, Karjalainen PA, Kaipio JP. 1998. A Kalman filter approach applied to the tracking of fast movements of organ boundaries: Chang HK, Zhang YT, Biomedical Engineering Towards the Year 2000 and Beyond. Proceedings ot the 20th Annual Conference of the IEEE Engineering in Medicine and Biology Society.IEEE. 1048-1051. 1998
• Vauhkonen M, Vauhkonen PJ, Kaipio JP. 1998. Estimation of organ boundaries in electrical impedance tomography. In: (ed.) , Proceedings of the X. International Conference on Electrical Bio-impedance.Universitat Politecnica de Catalunya. ss. 421-424. 1998
• Karjalainen PA, Vauhkonen M, Kaipio JP. 1998. Compartmental modeling in dynamic SPET using projection data: Chang HK, Zhang YT, Biomedical Engineering Towards the Year 2000 and Beyond. Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society.IEEE. 763-766. 1998
• Kaipio JP, Karjalainen PA, Somersalo E, Vauhkonen M. 1998. State estimation in time-varying electrical impedance tomography, Proceedings of the X. International Conference on Electrical Bio-impedance.Universitat Politecnica de Catalunya. 389-392. 1998
• Juntunen M, Tervo J, Kaipio JP. 1998. Stabilization of stationary and time-varying autoregressive models, Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing: ICASSP ¿98.IEEE Service Center. 2173-2176. 1998
• Juntunen M, Tervo J, Kaipio JP. 1998. Root modulus constraints in autoregressive model estimation CIRCUITS, SYSTEMS AND SIGNAL PROCESSING 17 6: 709-718. 1998
• Baroudi D, Kaipio J, Somersalo E. 1998. Dynamical electric wire tomography: a time series approach. INVERSE PROBLEMS 14: 799-813. 1998
• Kaipio JP, Kolehmainen V, Vauhkonen M, Somersalo E. 1998. Construction of anatomy-based priors with anisotropic characteristics with application to electrical impedance tomography: Chang HK, Zhang YT, Biomedical Engineering Towards the Year 2000 and Beyond. Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society.IEEE. 1032-1035. 1998
• Kolehmainen V, Vauhkonen M, Karjalainen PA, Kaipio JP. 1997. Spatial inhomogeneity and regularization in EIT, Magnificent Milestones and Emerging Opportunities in Medical Engineering. Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. [CD-ROM].IEEE. 449-452. 1997
• Vauhkonen M, Vauhkonen PJ, Kaipio JP, Karjalainen PA. 1997. Three-dimensional electrical impedance tomography using complete electrode model: Barbour RL, Carvlin MJ, Fiddy MA, Computational, Experimental, and Numerical Methods for Solving Ill-Posed Inverse Imaging Problems: Medical and Nonmedical Application. SPIE Proceedings Series. 166-174. 1997
• Vauhkonen M, Kaipio JP, Somersalo E, Karjalainen PA. 1997. Electrical impedance tomography with basis constraints. INVERSE PROBLEMS 13: 523-530. 1997
• V. Kolehmainen, M. Vauhkonen, P. A. Karjalainen and J. P. Kaipio. 1997. Comparison of adjacent and trigonometric current patterns in electrical impedance tomography MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING 35 suppl part 1: 320. 1997
• Somersalo E, Kaipio J, Vauhkonen M, Baroudi D, Järvenpää S. 1997. Impedance imaging and Markov chain Monte Carlo methods. In: Barbour RL, Carvlin MJ, Fiddy MA (ed.) , Computational, Experimental, and Numerical Methods for Solving Ill-Posed Inverse Imaging Problems: Medical and Nonmedical Applications. SPIE Proceedings Series. ss. 175-185. 1997
• Nihtilä MT, Tervo J, Kaipio JP. 1997. Simulation of a nonlinear distributed parameter bioreactor by FEM approach. SIMULATION PRACTICE AND THEORY 5: 199-216. 1997
• Nihtilä MT, Tervo J, Kaipio JP, Babary JP. 1997. On linearising control of a distributed parameter bioreactor: Sydow A, 15th IMACS World Congress on Scientific Computation, Modelling and Applied Mathematics. Vol 5. Systems Engineering.Wissenschaft und Technik Verlag. 221-226. 1997
• Nihtilä MT, Tervo J, Kaipio JP, Babary JP. 1997. Controller design issues and algorithms for a nonlinear distributed-parameter process, 1997 IEEE International Conference on Systems, Man, and Cybernetics. Computational Cybernetics and Simulation. SMC '97 Conference Proceedings.Institute of Electrical and Electronics Engineers. 2414-2419. 1997
• Ollikainen J, Vauhkonen M, Karjalainen PA, Ronkanen PJ, Kaipio JP. 1997. Effect of skull inhomogeneities on EEG localization accuracy, Magnificent Milestones and Emerging Opportunities in Medical Engineering. Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. [CD-ROM].IEEE. 2120-2123. 1997
• Kolehmainen V, Vauhkonen M, Karjalainen PA, Kaipio JP. 1997. Assessment of errors in static electrical impedance tomography with adjacent and trigonometric current patterns. PHYSIOLOGICAL MEASUREMENT 18: 289-303. 1997
• Kaipio JP, Somersalo E, Karjalainen PA, Vauhkonen M. 1997. Recursive estimation of fast impedance changes in electrical impedance tomography and a related problem. In: Barbour RL, Carvlin MJ, Fiddy MA (ed.) , Computational, Experimental, and Numerical Methods for Solving Problems: Medical and Nonmedical Applications. SPIE Proceedings Series. ss. 208-216. 1997
• Kaipio JP, Karjalainen PA. 1997. Simulation of nonstationary EEG. BIOLOGICAL CYBERNETICS 76: 349-356. 1997
• Kaipio JP, Karjalainen PA. 1997. Estimation of event-related synchronization changes by a new TVAR method. IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING 44 8: 649-656. 1997
• Kaipio J. 1997. Käänteisongelmia lääketieteellisessä tekniikassa ja fysiikassa. TIETOYHTEYS : TIETOTEKNIIKKA OPETUKSESSA JA TUTKIMUKSESSA 2: 9. 1997
• Kaipio J, Vauhkonen M. 1997. Käänteisongelmien tutkimus Kuopion yliopistossa TIETOYHTEYS : TIETOTEKNIIKKA OPETUKSESSA JA TUTKIMUKSESSA 2: 10. 1997
• Juntunen M, Kaipio JP. 1997. The inverse problem of depth dose curve estimation. PHYSICS IN MEDICINE AND BIOLOGY 42: 2147-2157. 1997
• Hiltunen JK, Karjalainen PA, Kaipio JP. 1997. Estimation of the dynamics of medium rate EEG transitions, Magnificent Milestones and Emerging Opportunities in Medical Engineering. Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. [CD-ROM].IEEE. 1220-1223. 1997
• Karjalainen PA, Vauhkonen M, Kaipio JP. 1997. Dynamic reconstruction in SPET, Magnificent Milestones and Emerging Opportunities in Medical Engineering. Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. [CD-ROM].IEEE. 777-780. 1997
• Ollikainen J, Vauhkonen M, Kaipio JP, Karjalainen PA. 1996. Using EIT resistivity estimates in EEG inverse problems. In: (ed.) , Proceedings of the 1st International Conference on Bioelectromagnetism.Ragnar Granit Foundation. Medical and Biological Engineering and Computing. Supplement. ss. 251-252. 1996
• Vauhkonen M, Vadász D, Karjalainen PA, Kaipio JP. 1996. Subspace regularization method for electrical impedance tomography, Proceedings of the 1st International Conference on Bioelectromagnetism.Ragnar Granit Foundation. Medical and Biological Engineering and Computing. Supplement. 165-166. 1996
• Savolainen T, Kaipio JP, Karjalainen PA, Vauhkonen M. 1996. Electrical impedance tomography measurement system for experimental use. REVIEW OF SCIENTIFIC INSTRUMENTS 67 10: 3605-3609. 1996
• Patomäki L, Kaipio JP, Karjalainen PA, Juntunen M. 1996. Tracking of nonstationary EEG with the polynomial root perturbation [CD-ROM]. In: (ed.) , Conference Proceedings. 1996 IEEE Engineering in Medicine and Biology. 18th Annual International Conference. Bridging Disciplines for Biomedicine.IEEE. ss. 1996
• Karjalainen PA, Kaipio JP, Koistinen AS. 1996. PCA based Bayesian estimation of single trial evoked potentials, Proceedings of the 1st International Conference on Bioelectromagnetism.Ragnar Granit Foundation. Medical and Biological Engineering and Computing. Supplement. 195-196. 1996
• Nihtila MT, Babary JP, Kaipio JP. 1996. Eigenvalue problems arising in the control of a distributed-parameter bioreactor. CONTROL ENGINEERING PRACTICE 4 7: 1015-1021. 1996
• Lyyra T, Lindgren R, Kaipio J, Vauhkonen M, Kiviranta I, Jurvelin JS. 1996. Numerical validitation of arthroscopic cartilage stiffness measurement using a finite element model, Proceedings of the 10th Nordic-Baltic Conference on Biomedical Engineering. Part 1.Ragnar Granit Foundation. Medical and Biological Engineering and Computing. Supplement. 173-174. 1996
• Karjalainen PA, Kaipio JP, Koistinen AS, Kärki T. 1996. Recursive Bayesian estimation of single trial evoked potentials [CD-ROM], Conference Proceedings. 1996 IEEE Engineering in Medicine and Biology. 18th Annual International Conference. Bridging Disciplines for Biomedicine.IEEE. 1996
• Kaipio J. 1996. Simulation and Estimation of Nonstationary EEG. Kuopion yliopiston julkaisuja C. Luonnontieteet ja ympäristötieteet. 1996
• Kaipio JP, Tervo J, Vauhkonen M. 1995. Simulations of the heterogeneity of environments by finite element methods. MATHEMATICS AND COMPUTERS IN SIMULATION 39: 155-172. 1995
• Patomäki L, Kaipio JP, Karjalainen PA. 1995. Tracking of nonstationary EEG with the roots of arma models, 1995 IEEE Engineering in Medicine & Biology. 17th Annual Conference & 21st Canadian Mecical and Biological Engineering Conference. [CD-ROM]. 1995
• Vauhkonen M, Kaipio JP, Patomäki L, Karjalainen PA. 1995. Basis constraints method in electrical impedance tomography: Shinkarenko V, Electrical Impedance Imaging in Biology and Medicine.International Society for Pathophysiology. 43-44. 1995
• Vauhkonen M, Kaipio JP, Somersalo E, Karjalainen PA. 1995. Basis constraint method for estimating conductivity distribution of the human thorax, Proceedings of the IX International Conference on Electrical Bio-Impedance. 528-531. 1995
• Virkkala J, Karjalainen P, Kaipio J. 1995. NeuroScan and macro utilities for Matlab V1.0. In: Computer Solutions Europe AB (ed.) , Final Program and Proceedings for the Nordic MATLAB Conference `95. ss. II-69 - II-71. 1995