Strip-tillage implements remove the residue from previous crops and form a seedbed ready for planting. An experiment was conducted to evaluate 5 row-cleaning devices. The proportion of residue removed by the implement was used as the performance indicator. Each of the 5 devices was evaluated at 2 speeds and orientations on the implement. The devices were tested in two blocks (fields) of corn residue (one high residue and one medium residue), and one field of wheat residue. An analysis was conducted, using a mixed-effects model, to compare the performance of the cleaners operating in the different conditions. All cleaners performed well, with no statistical difference in mean performance. All row cleaners performed more consistently in wheat residue, compared with performance in corn residue. Numerically, the consistency of the different cleaners was different, with one configuration performing less consistently than the other four. Edge-effects of the outside row unit of the implement had, in most cases, an insignificant effect on the row unit's cleaning performance.

Strip-tillage implements remove the residue from previous crops and form a seedbed ready for planting. An experiment was conducted to evaluate 5 row-cleaning devices. The proportion of residue removed by the implement was used as the performance indicator. Each of the 5 devices was evaluated at 2 speeds and orientations on the implement. The devices were tested in two blocks (fields) of corn residue (one high residue and one medium residue), and one field of wheat residue. An analysis was conducted, using a mixed-effects model, to compare the performance of the cleaners operating in the different conditions. All cleaners performed well, with no statistical difference in mean performance. All row cleaners performed more consistently in wheat residue, compared with performance in corn residue. Numerically, the consistency of the different cleaners was different, with one configuration performing less consistently than the other four. Edge-effects of the outside row unit of the implement had, in most cases, an insignificant effect on the row unit's cleaning performance.

The purpose of this thesis has been to convert two softwares called TPCAD (Three Phase Induction Machine Computer Aided Desing) and SPCAD (Single Phase Induction Machine Computer Aided Design) developed earlier for the design and analysis of three and single phase induction machines to meet the needs of motor manufacturing industry so that they can be run in windows environment. Furthermore, it was aimed to include features such as double cage motor analysis and design, to provide a facility designed motor lamination can be drawn for the user to see and facilitate sharing the designed lamination with other professional programs such as finite element analysis or thermal analysis etc. As a result of this study, a user friendly design tool facilitating the design process of induction motors has been upgraded by using C++ Microsoft Visual Studio .Net programming language. TPCAD and SPCAD are tested with different commercial motors. The results show that the full load performance calculations are within the range of 5% error for both programs. However, starting performance calculation errors are within 10% for TPCAD, and 8% for SPCAD.

In theoretical part of the thesis I first mentioned a project management structures and the way it compiles the price of the works. I also noted a general procedure for calculating the price of work construction machinery. Conclusion theoretical part I dedicated the composition, development and consumption of fuel prices. The aim of this thesis was to analyze the effect of changes in fuel prices on the cost of the building and generalize this affect the whole construction output. This target has been demonstrated in practical part of this work. I was doing calculations on a particular project.

Denna studie är en kvantitativ studie som syftar till att undersöka sambandet mellan tillgängligheten av reservdelar och maskinprestanda. Litografi och plasma är Silexs två produktionsstationer som undersöks i denna studie. Det analyseras data över en tre månaders period för att undersöka sambandet mellan reservdelskostnader och maskinernas drifttid. Metoden innefattar en kvantitativ analys av reservdelslager, maskinprestanda och rapporterade maskintillstånd. Statistiska verktyg används för att identifiera korrelationer. Resultaten visade att det finns en koppling mellan tillgängligheten av reservdelar och deras förbrukning, eftersom de maskiner som hade flest reservdelar på lager också gjorde flest uttag av reservdelar under underhåll. I Litografi fanns det en komplex korrelation: vissa maskiner visade en negativ korrelation mellan kostnad och prestanda eftersom de inte hade tillräckligt med reservdelar på lagret, medan andra maskiner visade en positiv korrelation, vilket tyder på att tillgängliga reservdelar förkortade drifttiden. Plasma-arean visade en positiv korrelation mellan reservdelskostnader och drifttid. Trots detta uppstod begränsningar för kapitalbindning och lagerutrymme som ett resultat av en överrepresentation av långsamtgående reservdelar i lagret. Slutsatsen är att det finns ett samband mellan maskinprestanda och tillgången på reservdelar, och att en balanserad tillgång till kritiska reservdelar är avgörande för att optimera driften. Förbättringar som skulle kunna göras inkluderar att standardisera rapporteringstekniker, skapa ett säkerhetslager för varje maskin. För att analysera slow-mover-reservdelar och göra en ekonomisk jämförelse mellan SLA-täckta och lagerreservdelar krävs ytterligare forskning. / This study is a quantitative analysis that aims to explore the link between spare parts availability and machine performance. The two production lines examined in this study are lithography and plasma at Silex. Data spanning a three-month period is analyzed to examine the correlation between spare parts costs and machine uptime. The methodology involves a quantitative analysis of spare parts stocks, machine performance, and reported machine conditions. Statistical tools are used to identify correlations. The results showed a correlation between spare parts availability and consumption, as machines with the highest spare parts stocks also made the most withdrawals during maintenance. In lithography, a complex correlation was observed: some machines showed a negative correlation between spareparts cost and machine performance due to insufficient spare parts stock, while others showed a positive correlation, suggesting that available spare parts shortened downtime. The plasma area showed a positive correlation between spare parts costs and uptime. However, limitations arose in terms of capital tied up and storage space due to an over-representation of slow-moving spare parts in the stock. The conclusion indicates a correlation between machine performance and the availability of spare parts, emphasizing that a balanced supply of critical spare parts is essential for optimizing operations. Suggested improvements include standardizing reporting techniques and creating a safety stock for each machine. Further research is needed to analyze slow-moving spare parts and make an economic comparison between SLA-covered and stock spare parts.