Professor
Head, Department of Wood Science
Forest Sciences Centre 2926
2424 Main Mall
Vancouver , BC V6T 1Z4
Canada
work phone: 6048226153
mobile: 6047867824

Research Areas:

  • Wood-water relations and sorption thermodynamics
  • Momentum, heat and mass transfer in wood
  • Modeling steady-state and dynamic non-isothermal diffusion in wood
  • Application of fractals and artificial neural networks to wood properties modeling
  • Modeling drying stresses in wood and their effect on quality
  • Industrial wood kiln drying optimization and development of new drying strategies
  • Radio frequency vacuum (RFV) heating and drying of wood and wood products

Research Areas

Wood physics
Wood drying
Non-destructive evaluation
Wood and energy
Dielectric heating and drying
Wood phytosanitation
Wood-water relations
Modeling of heat and mass transfer in wood
Porosity and fluid permeability
Wood and the environment
Cell wall architecture – nanoporosity

Projects

Modeling of wood thermo-sorptive behavior with artificial neural networks.
Development of timber drying quality prediction models.
Modeling drying stresses in timbers and logs.
Development of new methods to increase wood permeability.
Evaluation of post-drying treatments on timber quality.
RFV drying and heating of wood and wood products.
NDE evaluation of wet-pockets in hemlock using NIR technology
Superheated steam drying of western hemlock

Professional Affiliations

American Society for Testing and Materials ASTM
International Association of Wood Anatomists
Registered Professional Forester (EU)

Current Graduate Students

Ms. Sepideh Nourian, MSc
Wood drying
Ms. Jingbo Shi, PhD
Modeling sorption hysteresis and cell wall nanoporosity

Post Doctoral Fellows and Research Assistants

Dr. Amir Soshi

Current Courses

Winter 2017

FRST573 Advanced Wood Physics Sections

Winter 2017

WOOD244 Quantitative Methods in the Wood Industry Sections

Solving practical problems in the wood industry using computer-based mathematical tools including spreadsheets, visual basic programming and relational database systems.

Winter 2017
No WOOD course(s) were found for W2017 term.Winter 2017

WOOD384 Wood Sawmilling and Drying Sections

Introduction to primary log breakdown systems and lumber material flow in modern sawmills and planermills. Lumber drying equipment and methods.

Winter 2017

WOOD474 Wood Properties and Products Manufacturing Sections

Wood moisture, density and strength properties; manufacturing processes for major forest products.

Selected Publications


Lube, V., Lazarescu, C., Mansfield, S.D., and Avramidis, S. (2016). Wood microfibril angle variation in drying. Holzforschung 70(5):485-488 DOI: 10.1515/hf-2014-0334
Avramidis, S (2016). Dielectric properties of four softwood species at low-level radio frequencies for optimized heating and drying Drying Technology DOI 10.1080/07373937.2015.1072719
Demertzis, K., Iliadis, L., Avramidis, S. and Y. El-Kassaby (2016). Machine learning use in predicting interior spruce wood density utilizing progeny test information Drying Technology DOI 10.1080/07373937.2015.1072719 Drying Technology DOI 10.1080/07373937.2015.1072719
Zhan, J-F and Avramidis, S (2015). Needle Fir Wood Modified By Surface Densification and Post-Thermal Treatment: Hygroscopicity and Swelling Behavioρ European J. of Wood and Wood Prod. DOI: 10 1007_s00107-015-0969-y
Lazarescu, C., Breuil, C. and S. Avramidis (2015). Phytosanitation of mountain pine beetle infected lodgepole pine using dielectric fields at radio frequencies MADERAS, 17(2):
Bedelean, B., Lazarescu, C. and S. Avramidis (2015). Predicting RF Heating Rate During Pasteurization of Green Softwoods Using Artificial Neural Networks and Monte Carlo Method Wood Research J., 60(1): 83-94
Lazarescu, C., Panagiotidis K. and Avramidis, S (2014). Color variation of stained wood products in relationship with near infrared spectroscopy scans European Journal of Wood and Wood Products, 72:81-85
Rorhbach, K., Oliveira, L. and Avramidis, S (2014). Drying Schedule Structure and Subsequent Post-Drying Equalization Effect on Hemlock Timber Quality International Wood Products Journal, 5(1): 55-64
Wada, N., Avramidis, S. and L. Oliveira (2014). Internal moisture evolution in timbers exposed to ambient conditions following kiln drying. European Journal of Wood and Wood Products, 72(3): 377-384
Hilde, C., Woodward, R., Avramidis, S. and Hartley (2014). The Acoustic Properties of Water Submerged Lodgepole Pine (Pinus contorta) and Spruce (Picea spp.) wood and their suitability for use as musical instruments. Materials, 7(8): 5688-5699
Iliadis, L., Tachos, S., Avramidis, S., Mansfield, S.D. (2013). Hybrid e-Regression and validation soft computing techniques: the case of wood dielectric loss factor. Neurocomputing. 107:33–39.
Tekleyohannes, AT and S. Avramidis (2013). Golden ratio based scaling relations in the structure and transversal formations of growth rings International Wood Products Journal, 4(2): 89-94
Iliadis, L., Mansfield, S.D., Avramidis, S. and El-Kassaby, Y (2013). Predicting Douglas-fir Wood Density by Artificial Neural Networks Using Progeny Testing Information Holzforschung, 67(7): 771-777
Lazarescu, C. and S. Avramidis (2012). Heating characteristics of western hemlock in a high frequency field. European Journal of Wood and Wood Products, 70: 489-496
Lazarescu, C., Bedelean, B. and Avramidis S. (2012). Heating characteristics of softwoods in a high frequency field ProLigno, 8(4): 18-26.
Watanabe, K., Mansfield, S. D. and Avramidis, S. (2012). Wet-pocket classification in Abies lasiocarpa using visible and near infrared (Vis-NIR) spectroscopy European Journal of Wood and Wood Products. 70:61-67.
Tekleyohannes, AT and S. Avramidis (2012). Two-level System Dynamical Coarse-1 graining of Annual Rings -Wood Science and Technology, 46(1-2): 473-485
Abubakari, A., Avramidis, S. and L. Oliveira (2012). Impact of radio frequency heating pre-treatment on the kiln drying characteristics of sub-Alpine fir Journal of Wood and Wood Products, 70: 245-251
Watanabe, K., Mansfield, S. and S. Avramidis (2012). Wet-pocket classification in Abies lasiocarpa using visible and near infrared spectroscopy European Journal of Wood and Wood Products, 70: 61-67
Watanabe, K., Lazarescu, Shida, S. and S. Avramidis. (2012). A novel method of measuring moisture content distribution in timber during drying using CT scanning and image processing techniques Drying Technoloy 30(2): 256-262.
Hernandez, V., Avramidis, S. and Navarrete, J. (2012). Albino strains of Ophiostoma spp. fungi effect on radiata pine permeability European Journal of Wood and Wood Products, 70: 551-556.
Torres, S.S., Jomaa, W, Puiggali, J-R., and S. Avramidis (2011). Multiphysics modeling of vacuum drying of wood. Applied Mathematical Modeling Journal, 35(20): 5006-5016
Lazarescu, C., Dale, A., Uzunivic, A., Breuil, C. and S. Avramidis (2011). Radio frequency heating pasteurization of pinewood nematode infected wood -European Journal of Wood and Wood Products. 69: 573-578
Lazarescu, C., Dale, A., Uzunivic, A., Breuil, C. and S. Avramidis (2011). Radio frequency heating pasteurization of pinewood nematode infected wood. European Journal of Wood Products, 70:245-251
Watanabe, K., Abubakari, A., Lazarescu, C. and S. Avramidis (2011). Softwood heating in radio frequency fields. -European Journal of Wood and Wood Products, 69: 295-301
Mansfield, S., Kang ,K-Y., Iliadis, L., Tachos, S., and S. Avramidis (2011). Strength Prediction in Populus spp. Clones using Artificial Neural Networks and epsilon-regression Support Vector Machines -Holzforschung, 65: 855-863
Lazarescu, C. and S. Avramidis (2011). Radio frequency heating kinetics of softwood logs -Drying Technology 29(6): 673-681
Zhan, J and S. Avramidis (2011). Mechano-sorptive creep of hemlock under conventional drying: I. The determination of free shrinkage strain -Drying Technology 29(7): 789-796
Zhan, J and S. Avramidis (2011). Mechano-sorptive creep of hemlock under conventional drying: II. Description of actual creep behavior in drying lumber -Drying Technology 29(10): 1140-1149
Lazarescu, C., Watanabe, K. and S. Avramidis (2010). Density and Moisture Profile Evolution during Timber Drying by CT-Scanning Measurements. -Drying Technology, 28(4): 460-467
Tekleyohannes, A, and S. Avramidis (2010). Two-level self-organization of wood properties: a new paradigm for dimensional analysis and scaling. -Wood Science and Technology, 44: 253-268
Tanaka, T., Avramidis, S. and S. Shida. (2010). A Preliminary Study on Ultrasonic Treatment Effect on Transverse Wood Permeability. -MADERAS Scientia y technologia, 12(1): 3-9
Lazarescu, C., Avramidis, S. and L. Oliveira (2010). Modeling Shrinkage Response to Tensile Stresses in Wood Drying II. Stress – Shrinkage Correlation in Restrained Specimens. -Drying Technology, 28(2): 196-102
Lazarescu, C., Avramidis, S. and L. Oliveira (2010). Shrinkage Response to Tensile Stresses in Wood Drying III. Stress-Tensile Set Correlation in Short Pieces of Lumber -Drying Technology, 28(6): 745-751
Elustondo. D, Oliveira, L and S. Avramidis (2010). New Methodology to Optimize Sorting in Wood Drying. -MADERAS, 12(2): 79-91
Watanabe, K., Hart, J.F., Mansfield, S.D. and S. Avramidis (2010). Near-infrared technology applications for quality control in wood processing. -In proceedings of COST Action E53 Conference, Edinburgh, UK
Watanabe, K., Hart, F., Mansfield, S.D. and Avramidis, S. (2010). Detection of wet-pockets on the surface of Tsuga heterophylla (Raf.) Sarg. by near infrared (NIR) spectroscopy Holzforschung 64:55-60
Elustondo, D., Oliveira, L. and S. Avramidis. (2010). New Methodology to Optimize Sorting in Wood Drying -In proceedings of the 11th International IUFRO Conference on Wood Drying, Skelleftea, Sweeden, January 2010. 208-215
Lazarescu, C., Avramidis, S. and L. Oliveira. (2010). Shrinkage response to tensile stresses during hemlock (Tsuga heterophylla) drying -In proceedings of the 11th International IUFRO Conference on Wood Drying, Skelleftea, Sweeden, January 2010, 122-130.
Watanabe, K., Son, E., Lazarescu, C., Breuil, C. and S. Avramidis (2010). Radio Frequency Heating for Green Wood Phytosanitation -In proceedings of the 11th International IUFRO Conference on Wood Drying, Skelleftea, Sweeden, January 2010, 307-312.
Lazarescu, C., Plattner , A., Hart, F., Breuil, C., and S. Avramidis (2009). Pasteurization of Hemlock by Radio Frequency Heating: a preliminary study -Forest Products Journal, 59(4):79-83
Elustondo, D., Avramidis, S. and R. H. Keery (2009). RFV drying schedule development for western red cedar timbers -Journal of the Institute of Wood Science, 18(2):68-74.
Tanaka, T. Avramidis, S., Shida, S (2009). Evaluation of Moisture Content Distribution in Wood by Soft X-ray Imaging -Wood Science Journal, 55: 69-73.
Lazarescu, C. and S. Avramidis (2008). Drying Related Strain Development in Restrained Wood -Drying Technology, 26(5): 544-551
Watanabe, K., Saito, Y., Avramidis, S. and S Shida (2008). Non-destructive measurement of moisture distribution in wood during drying using digital X-ray microscopy -Drying Technology, 26(5): 590-595
Rayirath, P., Avramidis, A., Mansfield, S. D. (2008). The effect of wood drying on crystallinity and microfibril angle in black spruce (Picea mariana) Journal of Wood Chemistry and Technology. 28: 167-179.
Rayirath, P., Avramidis, S. (2008). Some aspects of western hemlock air permeability -MADERAS: Ciencia y Technologia, 10(3): 185-193
Kang, K-Y., Bradic, S. Avramidis, S. Mansfield, S. D. (2007). Kiln drying lumber quality of hybrid poplars clones. Holzforschung, 61(1): 65-73.
Elustondo, D., Avramidis, S. and R.H. Keery. (2007). RFV drying schedule development for western red cedar timbers. -Journal of the Institute of Wood Science,
Mansfield, S. D., Iliadis, L., Avramidis, S. (2007). Neural network prediction of bending strength and stiffness in Western Hemlock. Holzforschung, 61:707-716.
Lazarescu, C., and S. Avramidis (2007). Evaluation of Hygrothermal Shrinkage Strain in Tsuga heterophylla.
Alexiadis, P., D.H. Cohen, R.A. Kozak and S. Avramidis (2007). Kiln Drying Canadian Softwoods and Hardwoods: Different Species – Different Problems. The Journal of Institute of Wood Science 15(5):259-267.
Avramidis, S. and H. Wu (2007). Artificial neural network and mathematical modeling comparative analysis of nonisothermal diffusion of moisture in wood -Holz als Roh und Werkstoff, 65: 89-93
Bradic, S. and S. Avramidis (2007). Longitudinal air permeability of pinewood with beetle transmitted blue-stain -Holz als Roh und Werkstoff, 65: 183-185
Bradic, S. and S. Avramidis (2007). Impact of Juvenile Wood on Hemlock Timber Drying Characteristics -Forest Products Journal, 57(1/2): 53-59
Alexiadis, P., D.H. Cohen, R.A. Kozak, S. Avramidis and J. Welling (2007). Canadian Kiln Drying Survey: Benchmarks of Problems and Issues and a Comparison to Europe. The Journal of Institute of Wood Science 17(4):183-193.
Wu, H. and S. Avramidis (2006). Prediction of timber kiln drying rates by neural networks -Drying Technology, 24: 1-5.
Lazarescu, C., Wu Hongwei, and S. Avramidis (2006). Shrinkage Strain in Wood under Kiln Drying Conditions. -PRO Ligno, 2(2): 19 – 28
Hao, B. and S. Avramidis (2006). Timber moisture class assessment in kiln drying. -Journal of the Institute of Wood Science, 17(3): 121-133
Avramidis, S., Iliadis, L., Mansfield, S. D. (2006). Wood dielectric loss factor prediction with artificial neural networks Wood Science and Technology. 40: 563-574
Bradic, S. and S. Avramidis (2006). Impact of compression wood and slope of grain on timber drying of second growth hemlock -Prerada Drveta (Wood Processing) Journal, 4(15-16): 3-11
Avramidis, S., Shida, S., Koumoutsakos, A. and D. Kobayashi (2005). Stability study of square timbers in simulated house frame service in Japan. – Forest Products Journal, 55(10): 84-91
Avramidis, S., Shida, S., Koumoutsakos, A. and D. Kobayashi (2005). Stability study of square timbers in simulated house frame service in Japan – Forest Products Journal, 55(10): 84-91.
Avramidis, S. and L. Iliadis (2005). Predicting wood thermal conductivity using Artificial Neural Networks. -Wood and Fiber Science, 37(4): 682-690.
Avramidis, S. and Mansfield, S. D. (2005). On Some Physical Properties of Six Aspen Clones. Holzforschung. 59(1):54-58
Elustondo, D. and S. Avramidis (2005). Comparative analysis of three methods for stochastic lumber drying simulation. -Drying Technology, 23(1&2): 131-142.
Shida, S., Ikeda, T. and S. Avramidis (2005). Surface checking in air-drying of boxed-heart softwood in Japan. -Forest Product Journal, 55(1): 67-71.
Elustondo, D., Avramidis, S. and R. L. Zwick (2005). The demonstration of increased fiber utilization using optimized lumber sorting and radio frequency vacuum drying. -Forest Products Journal, 55(1): 76-83.
Papadopoulos, A., Avramidis, S. and D. Elustondo. (2005). The sorption of water vapour by chemically modified softwood: analysis using various sorption models. -Holz als Roh- und Werkstoff, 39: 99-112
Avramidis, S. and L. Iliadis (2005). Wood-Water Sorption Isotherm Prediction with Artificial Neural Networks: a preliminary study. -Holzforschung, 59: 336 – 341
Avramidis, S. and B. Hao (2005). Industrial scale moisture class assessment of Pacific coast hemlock kild drying. -UBC-Wood Science report to the Coastal Forest and Lumber Association and the ZAIRAI Lumber Partnership, Vancouver, BC. 25pp.
Elustondo, S., Avramidis, S. and L. Oliveira. (2005). Industrial evaluation of re-dry strategy for softwood lumber. -MADERAS: Ciencia y Technologia, 7(2):65-78.
Parfit, L.J., Hartley, I.D. and S. Avramidis (2005). Acoustic constant property of interior spruce (Picea spp.) from the central interior of British Columbia -Forest Products Journal, 55(9):74-76
Elustondo, D., S. Avramidis, and S. Shida (2004). Predicting thermal efficiency in timber radio frequency vacuum drying. Drying Technology, 22(4): 795-807.
Elustondo, D. and S. Avramidis (2004). The demonstration of increased lumber value using combined lumber sorting and RFV drying In proceedings of the COST E15 European Wood Drying Conference, April 2004, Athens, Greece, pages 111-120.
Avramidis, S. (2004). Exploratory evaluation of a dry/sort/re-dry (DSRD) strategy for thick timbers Journal of the Institute of Wood Science. 16(4): 204-210
Avramidis, S., J. Aune, and L. Oliveira (2004). Exploring pre-sorting and re-drying strategies for pacific coast hemlock square timbers. Journal of the Institute of Wood Science. 16(4): 189-198
Elustondo, D., S. Avramidis, and L. Oliveira. (2004). Estimation of green moisture content distribution in hemfir timber by stochastic simulation -Holzforschung, 58: 413-417.
Avramidis, S. and B. Hao (2004). Pacific coast hemlock stability and moisture class assessment UBC-Wood Science report to the Coastal Forest and Lumber Association and the ZAIRAI Lumber Partnership, Vancouver, BC. 41pp.
Avramidis, S (2004). A laboratory simulation of the physical response of 105 mm square hemfir timber during transportation and storage from Vancouver to Tokyo port. UBC-Wood Science report to the Coastal Forest and Lumber Association and the ZAIRAI Lumber Partnership, Vancouver, BC. 13pp.
Avramidis, S. (2004). Bound Water Migration in Wood European Union Press
Sackey, E.K., Avramidis, S. and L. C. Oliveira (2004). Exploratory Evaluation of Oscillation Drying for Thick Hemlock Timbers. Holzforschung, 58, 428-433.
Elustondo, D. and S. Avramidis (2004). Estimation of green moisture content distribution in hemfir timber by stochastic modeling Holzforschung, 58, 413-417
Alexiadis, P., D.H. Cohen, R.A. Kozak, S. Avramidis and J. Welling (2004). A Comparison of Kiln Drying Issues between Canada and Europe. Proceedings of the COST Action E15 5th International Conference on Wood Drying, Athens, Greece, April 2004. Proceedings 6-13.
Avramidis, S. and S. Shida. (2003). Stability of Hemlock Timbers in Transportation and Service in Japan UBC-Wood Science report to the Coastal Forest and Lumber Association and the ZAIRAI Lumber Partnership, Vancouver, BC. 25pp.
Avramidis, S. and B. Hao (2003). AUTOMATED LUMBER SORTING FOR STABILITY (ALSOS): Effect of Slope of Grain and Annual Ring Orientation on the Drying Characteristics of Hemlock Baby Squares UBC-Wood Science report to the Coastal Forest and Lumber Association and the ZAIRAI Lumber Partnership, Vancouver, BC. 27pp.
Elustondo, D. and S. Avramidis (2003). Simulated comparative analysis of sorting strategies for RFV drying. Wood and Fiber Science, 35(1): 49-55
Elustondo, D., Koumoutsakos, A. and S. Avramidis (2003). Non-deterministic description of wood drying: stochastic dispersion of data in radio frequency vacuum drying. Holzforschung, 57(1): 88-94
Elustondo, D., Oliveira, L. and S. Avramidis (2003). Evaluation of three semi-empirical superheated steam timber drying models. Drying Technology, 21(5): 875-893.
Wallace, J.W., Hartley, I.D. and S. Avramidis (2003). Conventional kiln drying and equalization of western hemlock to Japanese equilibrium moisture content. Holz als Roh- und Werkstoff, 61: 257-263.
Koumoutsakos, A, Avramidis, S. and S. Hatzikiriakos (2003). Radio frequency vacuum drying. Part III. Two-dimensional model, optimization and validation. Drying Technology, 21(8): 1399-1410.
Hao, B. and S. Avramidis (2003). Wood sorption fractality in the hygroscopic range. Part 2. New model development and validation. Wood and Fiber Science, 35(4): 601-608.
Garcia, P., Avramidis, S. and F. Lam (2003). Horizontal gas pressure and temperature distribution responses to OSB flake alignment during hot-pressing. Holz als Roh- und Werkstoff, 61(6): 425-431
Elustondo, D. and S. Avramidis (2003). Stochastic numerical model for conventional kiln drying of timbers. Japanese Journal of Wood Science, 49(6): 485-492.
Koumoutsakos, A. and S. Avramidis (2002). Mass transfer characteristics of western hemlock and western red cedar Holzforschung, 53(2):185-190
Avramidis, S. (2002). Stability response of square timbers: a laboratory simulation of shipping and storage Journal of the Institute of Wood Science, 16(1): 36-43
Elustondo, D. and S. Avramidis (2002). Stochastic numerical model for radio frequency vacuum drying of timbers Drying Technology, 20(9): 1827-1842
Koumoutsakos, A., Avramidis, S. and S.G. Hatzikiriakos (2002). Fundamental phenomena in wood RFV drying with 50-ohm amplifier technology MADERAS: Ciencia y Technologia, 4(1): 15-25
García, P.J., Avramidis, S. and F. Lam (2002). A regression model for horizontal temperature and gas pressure distributions. In Proceedings of the 6th Pacific Rim Bio-based Composites Symposium, Portland, OR
Garcia, P., Avramidis, S. and F. Lam (2002). Three-Dimensional Heat and Mass Transfer During Oriented-Strandboard Hot-Pressing. In Proceedings of the 6th Pacific Rim Bio-based Composites Symposium, Portland, OR, 268 – 277.
Zwick, R.L., Dergousoff, T. and S. Avramidis (2002). Design considerations of a commercial Q-Sift installation for re-drying hemlock lumber. 52nd annual meeting of the Western dry Kiln Association, Reno, Nevada, USA, 58-64.
Zwick, R.L, and S. Avramidis (2002). Commercial RF/V kiln drying – recent successes. In Proceedings of the 51st annual meeting of the Western Dry Kiln Association, Reno, Nevada, USA, 36-44.
Fang, F., J.N.R. Ruddick and S.A. Avramidis. (2001). Application of radio frequency heating to utility poles. Part 1. RF/V drying of round wood. Forest Products Journal, 51(7/8):6-60.
Fang, F., J.N.R. Ruddick and S. Avramidis. (2001). Application of radio frequency heating to utility poles. Part 2. Accelerated fixation of chromated copper arsenate. Forest Products Journal, 51(9):53-58.
Fang, F., J.N.R. Ruddick and S. Avramidis. (2001). Application of radio frequency heating to utility poles. Part 3. The use of RF heating to eradicate decay fungi in pole material. Forest Products Journal, 51(11/12):51-55.
Stavros AVRAMIDIS (2001). Q-sift – a novel processing approach to meet the end-user’s requirements for wood moisture content. “Advances in Wood Drying”, COST-E15 annual conference, Helsinki, Finland. pp. 94-103.
Koumoutsakos, A., S. Avramidis and S. Hatzikiriakos. (2001). Radio frequency vacuum drying. Part I. Theoretical model. Drying Technol. 19(1-2):67-86.
Koumoutsakos, A., S. Avramidis and S. Hatzikiriakos. (2001). Radio frequency vacuum drying. Part II. Experimental model evaluation. Drying Technol. 19(1-2):87-97.
Garcia, P., S. Avramidis and F. Lam. (2001). Internal temperature and pressue responses to flake alignment during hot-pressing. Holz als und Werstoff. 59:272-275.
Avramidis, S (2001). Evaluation of conventional and radio frequency vacuum drying and re-drying of pacific coast hemlock hashira and hirakaku timbers. (CARP-2) UBC-Wood Science report to the Coastal Forest and Lumber Association and the ZAIRAI Lumber Partnership, Vancouver, BC. 42pp.