Selaus nimekkeen mukaan kokoelmassa Väitöskirjat

    • Novel fuzzy k-nearest neighbor methods for effective classification and regression 

      Mailagaha Kumbure, Mahinda
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 10.11.2022)
      With the advancement of technology in many areas, an immense amount of data has currently become available, and discovering patterns and trends from this data is a core subject of interest in machine learning research. ...
    • Novel Methods for Assessing and Improving Usability of a Remote-operated Off-Road Vehicle Interface 

      Abdullah, Ummi Noor Nazahiah binti
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 09.12.2019)
      Autonomous control systems have been under intensive development in the off-road vehicle (ORV) industry because of high demand for increasing productivity in recent decades. In those systems, the progress has happened in ...
    • Novel Methods for Error Modeling and Parameter Identification of a Redundant Serial-Parallel Hybrid Robot 

      Wang, Yongbo
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 13.12.2012)
      To obtain the desirable accuracy of a robot, there are two techniques available. The first option would be to make the robot match the nominal mathematic model. In other words, the manufacturing and assembling tolerances ...
    • Novel process development in post-forming of an extruded wood plastic composite sheet 

      Matthews, Sami
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 07.04.2017)
      The demand for the utilization of plastic waste has increased due to the tightening environmental legislation and interest in material recycling. Wood plastic composites are one possible way to recycle thermoplastic ...
    • Novel Robot Solutions for Carrying out Field Joint Welding and Machining in the Assembly of the Vacuum Vessel of ITER 

      Pessi, Pekka
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 18.12.2009)
      It is necessary to use highly specialized robots in ITER (International Thermonuclear Experimental Reactor) both in the manufacturing and maintenance of the reactor due to a demanding environment. The sectors of the ITER ...
    • Novel Solutions for Improving Solid-State Photon Detector Performance and Manufacturing 

      Marochkin, Vladislav
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 15.12.2016)
      Radiation is all around us and most of the time we are not able to see it, nevertheless it brings us valuable information about the world we live in, so it is very important to be able to detect it with high accuracy. ...
    • Novel sorbents from low-cost materials for water treatment 

      Iakovleva, Evgenia
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 19.01.2018)
      Great attention has been paid in many studies to the environmental problems in mining. One of these is how to reduce water consumption during the ore mining and metal extraction process. Another ecological problem of mining ...
    • Novel treatment methods for green liquor dregs and enhancing circular economy in kraft pulp mills 

      Golmaei, Seyedmohammad
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 17.12.2018)
      Green liquor dregs (GLD) are known to be the largest fraction of inorganic residue in the kraft pulping process, or even in virgin pulp production. GLD originates from the chemical recovery cycle where effective cooking ...
    • Novel virtual environment and real-time simulation based methods for improving life-cycle efficiency of non-road mobile machinery 

      Luostarinen, Lauri
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 01.04.2015)
      Virtual environments and real-time simulators (VERS) are becoming more and more important tools in research and development (R&D) process of non-road mobile machinery (NRMM). The virtual prototyping techniques enable ...
    • Numerical and ExperimentalModelling of Gas Flow and Heat Transfer in the Air Gap of An Electric Machine 

      Kuosa, Maunu
      Acta Universitatis Lappeenrantaensis ISSN 1456-4491URN:ISSN:1456-4491 (08.11.2002)
      This work deals with the cooling of high-speed electric machines, such as motors and generators, through an air gap. It consists of numerical and experimental modelling of gas flow and heat transfer in an annular channel. ...
    • Numerical ductile fracture assessment of weldments in direct-quenched, ultra-highstrength steel 

      Neuvonen, Riku
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 01.12.2023)
      Many studies conducted in recent years have raised concerns about the ultimate loadcarrying and elongation capacities of weldments made of direct-quenched, ultra-highstrength steels (UHSS). The reason for this is the ...
    • Numerical modelling of small supersonic axial flow turbines 

      Grönman, Aki
      Acta Universitatis Lappeenrantaensis 392 (Lappeenranta University of Technology, 25.08.2010)
      Supersonic axial turbine stages typically exhibit lower efficiencies than subsonic axial turbine stages. One reason for the lower efficiency is the occurrence of shock waves. With higher pressure ratios the flow inside the ...
    • Numerical simulations of defect modeling in semiconductor radiation detectors 

      Golovleva, Maria
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 18.11.2022)
      Semiconductor radiation detectors are the core of high energy physics experiments. Silicon (Si)-based segmented particle sensors detect and track all the charged particles that are produced during the collisions in different ...
    • Observations of Acoustic Emission in Power Semiconductors 

      Kärkkäinen, Tommi
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 19.12.2015)
      Industrial, electrical power generation, and transportation systems, to name but a few, rely heavily on power electronics to control and convert electrical power. Each of these systems, when encountering an unexpected ...
    • Observations on Software Testing Practice 

      Taipale, Ossi
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (26.10.2007)
      This thesis investigates factors that affect software testing practice. The thesis consists of empirical studies, in which the affecting factors were analyzed and interpreted using quantitative and qualitative methods. ...
    • Offdesign operation of kraft recovery boiler 

      Vakkilainen, Esa K.
      LTKK Tieteellisiä julkaisuja - Research Papers (Lappeenranta University of Technology, 01.10.1993)
      A model to solve heat and mass balances during the offdesign load calculations was created. These equations are complex and nonlinear. The main new ideas used in the created offdesign model of a kraft recovery boiler are ...
    • Offshore Sourcing in Software Development: Case Studies of Finnish-Russian Cooperation 

      Kyrki, Anna
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 18.12.2008)
      The study examines international cooperation in product development in software development organisations. The software industry is known for its global nature and knowledge-intensity, which makes it an interesting setting ...
    • Oil and grease barrier properties of converted dispersion-coated paperboards 

      Ovaska, Sami-Seppo
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 25.11.2016)
      Changes in consumer habits and the replacement of solid trans fats in foodstuffs with unsaturated fats have increased the demand for low-cost grease-resistant packaging materials worldwide. Taking into account the global ...
    • Older consumers adopting information and communication technology: Evaluating opportunities for health care applications 

      Sintonen, Sanna
      Acta Universitatis Lappeenrantaensis (Lappeenranta University Technology, 18.12.2008)
      The purpose of this dissertation is to analyse older consumers' adoption of information and communication technology innovations, assess the effect of aging related characteristic, and evaluate older consumers' willingness ...
    • Omistajuus asiakasomisteisissa osuuskunnissa 

      Jussila, Iiro
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (2007)
      Asiakasomisteiset osuuskunnat ovat menestyneet Suomessa erittäin hyvin. Niiden ymmärtäminen yritysmuotona on kuitenkin toistaiseksi perustunut lähinnä muilla kuin liiketaloustieteen oppialoilla tehdyille tutkimuksille. ...