Hae LUTPubista
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Active du/dt Filtering for Variable-Speed AC Drives
(Lappeenranta University of Technology, 2009-12-17)
An oscillating overvoltage has become a common phenomenon at the motor terminal in inverter-fed variable-speed drives. The problem has emerged since modern insulated gate bipolar transistors have become the standard choice ...
Computational and Experimental Investigation of the Grooved Roll in Paper Machine Environment
(Lappeenranta University of Technology, 2009-12-16)
In the paper machine, it is not a desired feature for the boundary layer flows in the fabric and the roll surfaces to travel into the closing nips, creating overpressure. In this thesis, the aerodynamic behavior of the ...
Managerial Careers in the IT Industry: Women in China and in Finland
(Lappeenranta University of Technology, 2009-06-15)
This research focuses on the career experiences of women managers in the IT industry in China and Finland, two countries with different cultures, policies, size of population, and social and economic structures regarding ...
Improving the effectiveness of supply chain development work – an expert role perspective
(Lappeenranta University of Technology, 2009-01-23)
This study focuses to the intersection of three sets of activities in a company: expert work, development work and supply chain management, SCM. Experts and expert work represent a set of individuals whose efficiency and ...
Water circulations for effective bleaching of high-brightness mechanical pulps
(Lappeenranta University of Technology, 2009-11-27)
The amount of water available is usually restricted, which leads to a situation where a complete understanding of the process, including water circulations and the influence of water components, is essential. The main aim ...
Inter organizational learning within and by innovation networks
(Lappeenranta University of Technology, 2009-06-18)
The thesis deals with the phenomenon of learning between organizations in innovation networks that develop new products, services or processes. Inter organizational learning is studied especially at the level of the network. ...
Ajopuusta asiantuntijaksi – luottamushenkilöarvioinnin merkitys kunnan johtamisessa ja päätöksenteossa
(Lappeenrannan teknillinen yliopisto, 2009-04-03)
Tässä johtaminen ja organisaatiot –oppialaan kuuluvassa väitöstutkimuksessa selvitetään luottamushenkilöarvioinnin merkitystä kunnan johtamisessa ja päätöksenteossa. Tutkimuksessa kuvataan luottamushenkilöiden tekemää ...
Towards open access networks – prototyping with the Lappeenranta model
(Lappeenranta University of Technology, 2009-10-02)
The provision of Internet access to large numbers has traditionally been under the control of operators, who have built closed access networks for connecting customers. As the access network (i.e. the last mile to the ...
Supplier relationship management capability in the firm's global integration
(Lappeenranta University of Technology, 2009-10-16)
Organizing is a general problem for global firms. Firms are seeking a balance between responsiveness at the local level and efficiency through worldwide integration. In this, supply management is the focal point where ...
Study of a vapor-compression air-conditioning system for jetliners
(Lappeenranta University of Technology, 2009-11-04)
Most modern passenger aeroplanes use air cycle cooling. A high-speed air cycle is a reliable and light option, but not very efficient. This thesis presents research work done to design a novel vapour cooling cycle for ...