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Cardiovascular effects of short term exposure to electric and magnetic fields of electricity power transmission
(Julkaisuja / Tampereen teknillinen korkeakouluURN:ISSN:0356-4940 (1996)In the electrical industry the 50 Hz electric and magnetic fields are often higher than in the average working environment. The electric and magnetic fields can be studied by measuring or by calculatingthe fields in the ... -
Dynamic Model of a Small Once-Through Boiler
LTKK Tieteellisiä julkaisuja - Research papersURN:ISSN:0356-8210 (1996)In this study, a model for the unsteady dynamic behaviour of a once-through counter flow boiler that uses an organic working fluid is presented. The boiler is a compact waste-heat boiler without a furnace and it has a ... -
On the Reversed Brayton Cycle with High Speed Machinery
LTKK Tieteellisiä julkaisuja - Research papersURN:ISSN:0356-8210 (1996)This work was carried out in the laboratory of Fluid Dynamics, at Lappeenranta University of Technology during the years 1991-1996. The research was a part of larger high speed technology development research. First, there ... -
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 ... -
A Study on Fractionation and Ultrafiltration of Proteins with Characterized Modified and Unmodified Membranes
LTKK Tieteellisiä julkaisuja - Research reportsURN:ISSN:0356-8210 (23.08.1996)Membrane filtration has become increasingly attractive in the processing of both foodand biotechnological products. However, the poor selectivity of the membranes and fouling are the critical factors limiting the development ... -
Choice of Optimal MembraneProcesses for Economical Treatment of Paper Machine Clear Filtrate
LTKK Tieteellisiä julkaisuja - Research papersURN:ISSN:0356-8210 (1997)In this thesis membrane filtration of paper machnie clear filtrate was studied. The aim of the study was to find membrane processes which are able to produce economically water of sufficient purity from paper machine white ... -
Ash Particle Erosion on Steam Boiler Convective Section
LTKK Tieteellisiä julkaisuja - Research PapersURN:ISSN:0356-8210 (1997)In this study, equations for the calculation of erosion wear caused by ash particles on convective heat exchanger tubes of steam boilers are presented. Anew, three-dimensional test arrangement was used in the testing of ... -
Aksiaaliturbiinin suunnittelu kokemusperäisillä häviökertoimilla
(1997)Tässä raportissa on esitettyaksiaalisen turbiinivaiheen suunnittelun perusperiaatteet perustuen ideaalikaasun paisuntaprosessin termodynamiikkaan yhdistettynä kokemusperäisiin häviökertoimiin. Häviökertoimien avulla voidaan ... -
Competitor Information andCompetitive Knowledge Management in a Large Industrial Organization
LTKK Tieteellisiä julkaisuja - Research PapersURN:ISSN:0356-8210 (05.12.1997)Thisthesis supplements the systematic approach to competitive intelligence and competitor analysis by introducing an information-processing perspective on management of the competitive environment and competitors therein. ... -
The Effect of Operational Disturbances on Reliability and Operation Time Distribution of NCmachine Tools in FMS
Tieteellisiä julkaisuja - Research papers (Lappeenranta University of Technology, 12.12.1997)This thesis concentrates on studying the operational disturbance behavior of machine tools integrated into FMS. Operational disturbances are short term failures of machine tools which are especially disruptive to unattended ... -
Role of references in international industrial marketing : a theory-building case study about supplier’s processes of utilizing references
LTKK Tieteellisiä julkaisuja - Research Papers (Lappeenranta University of Technology, 16.12.1997)Scientific studies regarding specifically references do not seem to exist. However, the utilization of references is an important practice for many companies involved in industrial marketing. The purpose of the study is ... -
Ultrafine grinding of FGD and phosphogypsum with an attrition bead mill and a jet mill : optimisation and modelling of grinding and mill comparison
LTKK Tieteellisiä julkaisuja - Research Papers (Lappeenranta University of Technology, 22.12.1997)Fine powders of minerals are used commonly in the paper and paint industry, and for ceramics. Research for utilizing of different waste materials in these applications is environmentally important. In this work, the ... -
Lämmönsiirron numeerinen laskenta profiloidulle kanavalle.
(1998)Työn tavoitteena oli tutkia aaltomaisen profiloinnin vaikutusta suorien jäähdytyskanavien lämmönsiirtoon ja painehäviöön. Erilaisia profiileja oli kymmenen kappaletta ja ne olivat 5mm leveitä ja 30cm pitkiä kukin. Ne ... -
Verkostoyrittäjyys - Kouvolan pilottiprojekti
(1998)Tutkimuksen tavoitteena on tutkia miten menestyvä yritysverkosto luodaan. Tarkoituksena on perehtyä yritysten perustamisen ja verkostoitumisen teoriaan, joiden perusteella työn empiirisessä osassa analysoidaan Kouvolan ... -
The Optimisation of the Draft Tube of a Hydro Power Plant at Off-Design Conditions
(1998)Several possible methods of increasing the efficiency and power of hydro power plants by improving the flow passages are investigated in this stydy. The theoretical background of diffuser design and its application to the ... -
Analysis and Control of Excitation, Field Weakening and Stability in Direct Torque Controlled Electrically Excited Synchronous Motor Drives
Tieteellisiä julkaisuja - Research papers (Lappeenranta University of Technology, 1998)Direct torque control (DTC) is a new control method for rotating field electrical machines. DTC controls directly the motor stator flux linkage with the stator voltage, and no stator current controllers are used. With the ... -
The value of future opportunities: comparison of information technology firms and forest companies
(1998)There are several alternatives for valuing the future opportunities of firms. The traditional appraisal methods for single projects such as net present value, internalrate of return and payback rules have been criticized ... -
Improving the Potentials of Logistics Processes: Identification and Solutions
Tieteellisiä julkaisuja - Research papers (Lappeenranta University of Technology, 21.10.1998)The importance of logistics for companies is a well known and justified issue. Today, enterprises are developing their logistics processes in order to match their products and services to the requirements of the most ... -
Electrochemical Characterisation of Filter Media Properties and Their Exploitation in Enhanced Filtration
LTKK Tieteellisiä julkaisuja- Research papers (30.10.1998)Streaming potential measurements for the surface charge characterisation of different filter media types and materials were used. The equipment was developed further so that measurements could be taken along the surfaces, ... -
Development a distributed simulation environment on a cluster of workstations
Tieteellisiä julkaisuja - Research papers (Lappeenranta University of Technology, 15.12.1998)Simulation has traditionally been used for analyzing the behavior of complex real world problems. Even though only some features of the problems are considered, simulation time tends to become quite high even for common ...