• Timing of Capacity Change: Models for Capital Intensive Industry 

      Kärri, Timo
      Acta Universitatis Lappeenrantaensis (Lappeenrannan teknillinen yliopisto / Lappeenranta University of Technology, 15.12.2007)
      The suitable timing of capacity investments is a remarkable issue especially in capital intensive industries. Despite its importance, fairly few studies have been published on the topic. In the present study models for the ...
    • Performance Characteristics of an Axial-Flux Solid-Rotor-Core Induction Motor 

      Valtonen, Mikko
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 13.12.2007)
      The integration of electric motors and industrial appliances such as pumps, fans, and compressors is rapidly increasing. For instance, the integration of an electric motor and a centrifugal pump provides cost savings and ...
    • Impingement jet cooling of end windings in a high-speed electric machine 

      Punnonen, Pekka
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 04.12.2007)
      The rotational speed of high-speed electric machines is over 15 000 rpm. These machines are compact in size when compared to the power rate. As a consequence, the heat fluxes are at a high level and the adequacy of cooling ...
    • Experimental thermal hydraulic studies on the enhancement of safety of LWRs 

      Purhonen, Heikki
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 18.12.2007)
      The safe use of nuclear power plants (NPPs) requires a deep understanding of the functioning of physical processes and systems involved. Studies on thermal hydraulics have been carried out in various separate effects and ...
    • Aqueous photocatalytic oxidation of steroid estrogens 

      Karpova, Tatjana
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 14.12.2007)
      Concerns have increased regarding the detection of endocrine-disrupting compounds in the effluents of sewage treatment plants (STPs). These compounds are able to disrupt normal function of the endocrine system of living ...
    • Analysis of Industrial Granular Flow Applications by Using Advanced Collision Models 

      Huang, Jun
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 19.12.2007)
      Granular flow phenomena are frequently encountered in the design of process and industrial plants in the traditional fields of the chemical, nuclear and oil industries as well as in other activities such as food and materials ...
    • Quantum transport phenomena and shallow impurity states in CdSb 

      Lashkul, Alexander
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 17.12.2007)
      This work is dedicated to investigation of the energy spectrum of one of the most anisotropic narrow-gap semiconductors, CdSb. At the beginning of the present studies even the model of its energy band structure was not ...
    • Market entry order and competitive advantage of the firm 

      Tuppura, Anni
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 30.11.2007)
      A firm that wishes to launch a new product to the market is faced with a difficult task of deciding what the best moment for the launch is. Timing may also be critical when a firm plans to adopt new processes or intends ...
    • Purification and fractionation by nanotiltration in dairy and sugar and sweetener industry applications 

      Sjöman, Elina
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 15.12.2007)
      Nanotiltration is a membrane separation method known for its special characteristic of rejecting multivalent ions and passing monovalent ions. Thus, it is commonly applied with dilute aqueous solutions in partial salt ...
    • On the Condition Monitoring of Induction machines 

      Lindh, Tuomo
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (03.12.2003)
      The research of condition monitoring of electric motors has been wide for several decades. The research and development at universities and in industry has provided means for the predictive condition monitoring. Many ...
    • Business Development Efforts and Performance Improvements in SMEs Case Study of Business Development Projects Implemented in SME 

      Forsman, Helena
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (2005)
      Under the circumstances of the increasing market pressure, enterprises try to improve their competitive position by development efforts, and a business development project is one tool for that. There are not many answers ...
    • Computational and Experimental Analysis of Flow Field in the Diffusers of Centrifugal Compressors 

      Turunen-Saaresti, Teemu
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (26.11.2004)
      Centrifugal compressors are widely used for example in process industry, oil and gas industry, in small gas turbines and turbochargers. In order to achieve lower consumption of energy and operation costs the efficiency of ...
    • Power quality improving with virtual flux-based voltage source line converter 

      Tarkiainen, Antti
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (05.03.2005)
      Line converters have become an attractive AC/DC power conversion solution in industrial applications. Line converters are based on controllable semiconductor switches, typically insulated gate bipolar transistors. Compared ...
    • Assessing the technical competitiveness of printing papers 

      Jernström, Eeva
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (2000)
      This dissertation studies the technical quality assessment of a printing paper. The theoretical framework basis on the customer value hierarchy concept and the product integrity concept. The experimental part of the research ...
    • Dynamic Simulations of Rotors during Drop on Retainer Bearings 

      Kärkkäinen, Antti
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (07.11.2007)
      The active magnetic bearings have recently been intensively developed because of noncontact support having several advantages compared to conventional bearings. Due to improved materials, strategies of control, and electrical ...
    • Effect of physico-chemical conditions and operating parameters on flux and retention of different components in ultrafiltration and nanofiltration fractionation of sweet whey 

      Butylina, Svetlana
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (18.05.2007)
      Tässä väitöstutkimuksessa tutkittiin fysikaaliskemiallisten olosuhteiden ja toimintaparametrien vaikutusta juustoheran fraktiointiin. Kirjallisuusosassa on käsitelty heran ympäristövaikutusta, heran hyödyntämistä ja heran ...
    • In Search of Corporate Renewal: How to Benefit from Corporate Venturing? 

      Kola-Nyström, Sari M.
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (18.12.2007)
      Despite the rapid change in today's business environment there are relatively few studies about corporate renewal. This study aims for its part at filling that research gap by studying the concepts of strategy, corporate ...
    • Influence of stationary phase and eluent properties on chromatographic separation of carbohydrates 

      Tiihonen, Jari
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (13.12.2002)
      In this thesis, the sorption and elastic properties of the cation-exchange resins were studied to explain the liquid chromatographic separation of carbohydrates. Na+, Ca2+ and La3+ form strong poly(styrene-co-divinylbenzene) ...
    • Development of filter media treatments for liquid filtration 

      Järvinen, Kimmo
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (18.12.2007)
      Woven monofilament, multifilament, and spun yarn filter media have long been the standard media in liquid filtration equipment. While the energy for a solid-liquid separation process is determined by the engineering work, ...
    • A Topological Approach to Fuzzy Sets 

      Kortelainen, Jari
      Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (1999)
      This thesis presents a topological approach to studying fuzzy setsby means of modifier operators. Modifier operators are mathematical models, e.g., for hedges, and we present briefly different approaches to studying modifier ...