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Network effects: Scale development and implications for new product performance
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 10.12.2011)More and more innovations currently being commercialized exhibit network effects, in other words, the value of using the product increases as more and more people use the same or compatible products. Although this phenomenon ... -
New Distance Transforms for Gray Level Image Compression
Tieteellisiä julkaisuja (Lappeenranta University of Technology, 27.04.1996)This thesis deals with distance transforms which are a fundamental issue in image processing and computer vision. In this thesis, two new distance transforms for gray level images are presented. As a new application for ... -
New methods for controlling twin configurations and characterizing twin boundaries in 5M Ni-Mn-Ga for the development of applications
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 10.06.2015)Traditional methods for studying the magnetic shape memory (MSM) alloys Ni-Mn-Ga include subjecting the entire sample to a uniform magnetic field or completely actuating the sample mechanically. These methods have produced ... -
Ni-Mn-Ga magnetic shape memory alloy for precise high-speed actuation in micro-magneto-mechanical-systems
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 17.01.2019)Single crystalline Ni-Mn-Ga alloys are known for their large reversible magnetic-field-induced strain (MFIS) of several percent. This effect was discovered and named magnetic shape memory (MSM) by K. Ullakko in 1996. Since ... -
NMR studies of functionalized peptide dendrimers
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 14.10.2022)This work is devoted to studying the peptide dendrimers functionalized by double insertions of different amino acid residues by NMR methods. The structures of the dendrimers were confirmed by one- and two-dimensional 1H ... -
Non-Linear Journal Bearing Model for Analysis of Superharmonic Vibrations of Rotor Systems
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 14.11.2008)A rotating machine usually consists of a rotor and bearings that supports it. The nonidealities in these components may excite vibration of the rotating system. The uncontrolled vibrations may lead to excessive wearing of ... -
Novel control, haptic and calibration methods for teleoperated electrohydraulic servo systems
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 27.06.2015)The aim of this thesis is to propose a novel control method for teleoperated electrohydraulic servo systems that implements a reliable haptic sense between the human and manipulator interaction, and an ideal position ... -
Novel fuzzy k-nearest neighbor methods for effective classification and regression
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
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
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
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
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
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
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
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
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
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
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
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
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 ...