Jari Sirviö

ORCID: 0009-0007-5169-403X
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About
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Research Areas
  • Material Properties and Processing
  • Wood Treatment and Properties
  • Forest ecology and management
  • Textile materials and evaluations
  • Advanced Cellulose Research Studies
  • Lignin and Wood Chemistry
  • Industrial Vision Systems and Defect Detection
  • Research in Social Sciences
  • Biofuel production and bioconversion
  • Forest Ecology and Biodiversity Studies
  • Color Science and Applications
  • Tree-ring climate responses
  • Forest Management and Policy
  • Tree Root and Stability Studies
  • Engineering Technology and Methodologies
  • Natural Fiber Reinforced Composites
  • Advanced Sensor Technologies Research
  • Fiber-reinforced polymer composites
  • Polymer Science and Applications
  • Clinical Laboratory Practices and Quality Control
  • Musculoskeletal pain and rehabilitation
  • Metallurgy and Material Science
  • Advanced Multi-Objective Optimization Algorithms
  • Total Knee Arthroplasty Outcomes
  • Industrial Engineering and Technologies

VTT Technical Research Centre of Finland
2011-2024

LS Plant Breeding (United Kingdom)
2020

Tieto (Finland)
2016

Keskuslaboratorio
2005-2007

University of Helsinki
1998-2001

Traditional design of experiments and response surface methodology are widely used in engineering process development. Bayesian optimization is an alternative machine learning approach that adaptively selects successive experimental conditions based on a predefined performance measure. Here we compared the two approaches using simulations empirical alkaline wood delignification to identify important benefits drawbacks context experiments. The showed selection initial measurement noise...

10.1016/j.heliyon.2024.e24484 article EN cc-by Heliyon 2024-01-01

<ja:p>Distributions of three cross-sectional dimensions: radial and tangential tracheid width, cell wall thickness in different timber assortments Norway spruce were investigated. Wood samples from a mature stand measured with SilviScan. In the analysis, virtual trees constructed measurement data, divided into assortments: whole stem, top pulpwood sawmill chips. Average values distributions properties calculated for all assortments, earlywood latewood across tree assortment. There was...

10.14214/sf.266 article EN cc-by-sa Silva Fennica 2008-01-01

<ja:p>Cell wall thickness and tracheid radial tangential diameter are important characteristics in papermaking. These fibre cross-sectional dimensions affect paper properties such as light scattering, tear tensile indexes. In the authors’ previous article, mean values distributions of were obtained for Norway spruce (Picea abies). This article characterises Scots pine (Pinus sylvestris) using exactly same methodology study on spruce, which enables comparison between tree species. The cell...

10.14214/sf.188 article EN cc-by-sa Silva Fennica 2009-01-01

A method for producing lignocellulosic fibrillar fines directly from moist wood through a grinding process was evaluated. The is based on conventional stone with novel surface structure. (wheel) profile serrated in the axial direction of wheel, forces fibres to break down into fibrils instead detaching as matrix. arrangement mimics inclined feeding log against and completed without any related technical difficulties. Typically over 90% conversion rate (passing Standard Mesh 200 wire) were...

10.15376/biores.13.3.5032-5041 article EN BioResources 2018-05-15

Traditional micromechanical theories for the tensile strength of paper do not account stiffness paper, even though in practice is closely coupled with stiffness. Another problem input parameters, few which have a precise meaning real paper. Especially interpretation inter-fiber bonding ambiguous. None existing connects an independently measurable value degree or bond strength. As result, conventional data unreliable. In this we will present “macromechanical” study that measured values and...

10.15376/frc.2005.1.563 article EN 2005-01-01

Article Mechanical Pulping: The influence of fibre wall thickness and fibril angle on development in the TMP process was published January 1, 2011 journal Nordic Pulp & Paper Research Journal (volume 26, issue 1).

10.3183/npprj-2011-26-01-p006-013 article EN Nordic Pulp & Paper Research Journal 2011-01-01
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