In locum Pauli ad Colossenses cap. I. v. 12

Invokaatio: D.D.

De certamine Davidis cum Goliatho, I Sam. XVII. cap. commemorato 2

Invokaatio: I.N.D.

De petitione Naamanis Syri, II. Reg. cap. V. vers. 18

Invokaatio: D.D.

De spiritu vivificante, Joh. cap. VI. com. 63

Invokaatio: I.N.J.

De shores Ishai Jesaiae cap. XI. com. X

Invokaatio: I.N.J.

De mediatore non unius Galat. cap. III. com. XX

Invokaatio: Jehovah auxiliante.

Permanent magnet synchronous generator design solution for large directdrive wind turbines: Thermal behavior of the LC DD-PMSG

Wind is one of the most compelling forms of indirect solar energy. Available now, the conversion of wind power into electricity is and will continue to be an important element of energy self-sufficiency planning. This paper is one in a series intended to report on the development of a new type of generator for wind energy; a compact, high-power, direct-drive permanent magnet synchronous generator (DD-PMSG) that uses direct liquid cooling (LC) of the stator windings to manage Joule heating losses. The main param-eters of the subject LC DD-PMSG are 8 MW, 3.3 kV, and 11 Hz. The stator winding is cooled directly by deionized water, which flows through the continuous hollow conductor of each stator tooth-coil winding. The design of the machine is to a large degree subordinate to the use of these solid-copper tooth-coils. Both steady-state and timedependent temperature distributions for LC DD-PMSG were examined with calculations based on a lumpedparameter thermal model, which makes it possible to account for uneven heat loss distribution in the stator conductors and the conductor cooling system. Transient calculations reveal the copper winding temperature distribution for an example duty cycle during variable-speed wind turbine operation. The cooling performance of the liquid cooled tooth-coil design was predicted via finite element analysis. An instrumented cooling loop featuring a pair of LC tooth-coils embedded in a lamination stack was built and laboratory tested to verify the analytical model. Predicted and measured results were in agreement, confirming the predicted satisfactory operation of the LC DD-PMSG cooling technology approach as a whole.

De helsosamma ords eftersyn, 2 Tim. 1:13. Uti den ordning som d. Lutheri Catechismus, uti des hufwudstycken innehåller; efter de förnämste catecheters anledning, uti enfaldiga frågor och swar förestäld, af Eric Frosterus cap. wid Haukipudas capel, Ijå sokn och Österbotten

Arkit: 2 arkintunnuksetonta lehteä, A-L8.

Water chemistry management for future large experimental facilities

The thesis focuses on the water chemistry of the experimental test facilities and their reference VVER reactors. The main objective of the thesis is to provide recommendations for water chemistry management for laboratory facilities (VEERA, PACTEL) simulating the VVERs and for the large future facilities of the Lappeenranta University of Technology. In the beginning, the concept of nuclear power generation and the applicability of the nuclear power usage is discussed. Next, different water chemistry and water purification systems in primary and secondary circuits currently used at the power plant have been outlined. Also the construction geometry and design of test facilities PACTEL and VEERA, as well as the operation principles of their main equipment has been described. Finally, the appropriate water chemistry and water treatment system have been proposed for the existing and future experimental facilities of LUT.

De helsosamma ords eftersyn, 2 Tim. 1:13. Uti den ordning som d. Lutheri Catechismus, uti des hufwudstycken innehåller; efter de förnämste catecheters anledning, uti enfaldiga frågor och swar förestäld, af Eric Frosterus cap. wid Haukipudas capel, Ijå sokn och Österbotten

Arkit: 2 arkintunnuksetonta lehteä, A-L8.

Developing asset management in district heating and cooling business in a large energy company

The purpose of this Master´s Thesis is to develop asset management and its practices in case company. District heating and cooling systems operated by case company around Finland, Sweden, Poland and the Baltics form an enormous-sized asset base where some parts are starting to reach their end of life-cycles. Large-sized asset renewal actions are under discussion and maintenance spending is increasing. Financially justified decisions in changing business environment are needed. Asset management is one of the most important concepts for production organization which operates with capital-intensive production assets. Organizations profitability is highly dependent on assets´ performance. Such assets, like district heating and cooling systems, should be utilized as efficiently as possible within their life-cycles but also maintained and renewed optimally. In this qualitative thesis, empirical interview study was conducted to describe the current situation on how the assets are managed in the case company and to examine the readiness to implement a new, risk-based solution. Asset management revealed to be a very well-known concept. From proposed risk-based asset management point of view, several key observations were made. It was seen as a suitable solution, but further development will be needed. Based on the need and findings, several key processes and frameworks were created and also tested with a case study. Assets` condition monitoring should be improved, which would have a positive impact on event probability assessment. Risk acceptance is also a thing to be discussed further. When the evaluation becomes fluent in single investment cases, portfolio-level expansion should be considered and started. As a result, thesis proposes a solution how risk-based asset management could be performed practically in a capital-intensive case company in order to optimize the maintenance spending in a long run. Created practical framework is made universal: similar principles can be applied into multiple cases in case company but also in other energy companies. Risk-based asset management`s benefits could be utilized best in portfolio-level optimization where the capital would be invested to the most important objects from total risk point of view. Eventually, such approach would allow case company to optimize capital spending in a situation where funds are not adequate to cover all the mandatory needs and prioritization between the investment alternatives will truly be needed.

Toimitusjohtajan kannustinjärjestelmät Helsingin pörssin Small Cap -yhtiöissä 2010-2014

Tutkimuksen tavoitteena on tarkastella millaisia toimitusjohtajille suunnattuja kannustinjärjestelmiä on käytössä Helsingin pörssin Small Cap -kokoluokan yhtiöissä. Lisäksi työssä tarkastellaan kannustinjärjestelmien mahdollisia toimialakohtaisia eroavaisuuksia sekä kannustinjärjestelmissä mahdollisesti tapahtuneita muutoksia. Tutkimuksen tarkastelujaksona ovat vuodet 2010–2014, jolloin käytössä on ollut vuoden 2010 uusittu listayhtiöiden hallinnointikoodi. Small Cap -luokan yhtiöiden kannustinjärjestelmien ei havaittu toimialoittain verrattuna eroavan toisistaan huomattavalla tavalla. Kaikki tutkitut yhtiöt maksoivat toimitusjohtajalle kiinteää palkkaa, eläkejärjestelyjen käytön havaittiin vähentyneen, lyhyen aikavälin tulospalkkioiden käyttö oli kaikilla toimialoilla hyvin yleistä, kun taas vastaavasti pitkän aikavälin tulospalkkiota käytettiin kannustinkeinona vain yhdessä yhtiössä. Pitkän aikavälin kannustimena yhtiöiden havaittiin suosivan osakepohjaisia järjestelyjä, joista voimassa olevien optio-ohjelmien havaittiin tarkastelujaksolla hieman vähentyneen osakepalkitsemisen vastaavasti yleistyessä.

Solving large sparse linear systems over the field GF(2)

Nowadays problem of solving sparse linear systems over the field GF(2) remain as a challenge. The popular approach is to improve existing methods such as the block Lanczos method (the Montgomery method) and the Wiedemann-Coppersmith method. Both these methods are considered in the thesis in details: there are their modifications and computational estimation for each process. It demonstrates the most complicated parts of these methods and gives the idea how to improve computations in software point of view. The research provides the implementation of accelerated binary matrix operations computer library which helps to make the progress steps in the Montgomery and in the Wiedemann-Coppersmith methods faster.