On a request from the water sewage plant Gryaab in Gothenburg a power quality survey was performed. The voltages and currents have continuously been sampled in the incoming 10 kV substation HSP01 from April-August 2008. Power quality measurements were also performed in Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of the induction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps to the plant. The reason for the latter measurement was due to registered negative transients each time the motor was connected to the grid. The cause of the transients could be explained by the coupling in the substation, the ageing of the motor which could result in damage of the bearings or resonance in the motor circuit which amplifies high frequency harmonics.

The division of Electricity at Uppsala University runs a project called Lysekil project, they have designed a buoy that uses the waves to create electric power from a generator attached to the bottom of the sea.Uppsala University is closely connected with the company Seabased and the university makes use of their facilities in Lysekil. When they designed the buoy issues occurred, the geometric design was flawed, brackets with a short shelf life and it is generally uneconomic.A study visit was done in Lysekil on Seabased facility. With this visit the project started, which is to improve the design of the buoy and the attachment of wires leading to the generator. In this project we have chosen to use a beam system with three beams that are attached to the buoy. Then a wire attached to a plate that sits between the beams will be leading to the generator. Two proposals for construction are created, what distinguishes them are the brackets between the beams and the buoy.From these constructions, the design that is considered most optimal for our project is chosen.All parts of the buoy have been modeled and the drawings are designed in ProEngineer software.The two constructions are compared with each other, but the whole focus is on the second and final structure. The report begins with an introduction describing Lysekil project, and a task description of our project.The project aims to produce an optimal buoy that will be easy to design, materials restrictive with good durability and an economical solution.Wave power true function has been studied, mechanical and finite element analysis of beams, buoy and plate design.This has been presented in this report, where in the various chapters can read more about the processes. Although the relevant facts and information on this project and buoy development is included.

During the past years fire has been identified as an important factor for nature conservation in the forest landscape. To accurately quantify the size of a burnt area is obviously important, but also to quantify the degree of fire damage to the tree canopy. Such data are important for assessing the conservation value, and to support planning and management of the burned area in the future. I have examined how to estimate the status of tree crowns after fire from interpretation of aerial photographs. This is possible because fire changes the structure of tree crowns and this influences the colours in aerial photographs by spectral reflection. Included in the study are four areas, three of which burned in 2005 and one in 2006.

This thesis gives suggestions as to how to design a wooden-based wave-power buoy. The thesiswas carried out at Uppsala University in collaboration with the Division of Electricity and AppliedMechanical Engineering. The product was conceived and developed taking into consideration anumber of requirements put forward by the supervisor, Magnus Rahm. The most importantdemands were that the material used should be able to withstand pressure from the sea withoutbeing damaged and that the production costs should be low.Department of Engineering Sciences, Division of Electricity at Uppsala University was visitedseveral times to discuss issues including the various ideas with the supervisor Magnus Rahm, andwith several people in the department.The work started by studying available literature in order to get background information aboutsuitable methods available for the project and to see how similar projects were carried out. Thereason for this was to get a better understanding of this particular problem and how to solve it.After consulting the supervisor, the group decided to construct four different buoys using fourdifferent materials.

This thesis gives suggestions as to how to design a wooden-based wave-power buoy. The thesiswas carried out at Uppsala University in collaboration with the Division of Electricity and AppliedMechanical Engineering. The product was conceived and developed taking into consideration anumber of requirements put forward by the supervisor, Magnus Rahm. The most importantdemands were that the material used should be able to withstand pressure from the sea withoutbeing damaged and that the production costs should be low.Department of Engineering Sciences, Division of Electricity at Uppsala University was visitedseveral times to discuss issues including the various ideas with the supervisor Magnus Rahm, andwith several people in the department.The work started by studying available literature in order to get background information aboutsuitable methods available for the project and to see how similar projects were carried out. Thereason for this was to get a better understanding of this particular problem and how to solve it.After consulting the supervisor, the group decided to construct four different buoys using fourdifferent materials.

En väsentlig fråga hos textil- och klädindustrin (TK-industrin) har alltid varit om de skall utföra arbetet själv eller köpa in arbetet. TK-industrin använder sig av outsourcing på grund av att de inte själva klarar av att sköta verksamheten på ett tillfredställande sätt eller att man helt enkelt väljer att inte utföra arbetet själv. De främsta motiven till att outsourca är att företaget vill uppnå kostnadsbesparingar och fokusera på kärnverksamheten. TK-industrin är unik och frågan är om det främsta motivet är kostnadsbesparingar eller finns det andra motiv såsom fokus på kärnverksamhet, flexibilitet eller bättre kvalité som är huvudmotivet till outsourcing.Vårt syfte med uppsatsen är att genom intervjuer undersöka varför TK-industrin använder sig av outsourcing och vilka effekter det ger. Uppsatsen syftar även till att ta reda på hur specialiserade logistikföretag kan förbättra för företag inom TK-industrin.

Bakgrund och problem: Enligt studier genomförs investering i affärssystem för attuppfylla två syften, att förbättra beslutskvaliteten och att effektivisera processer. Inköp avett nytt affärssystem är en omfattande process, både vad det gäller arbetsinsats som krävsav företaget och kostnad. I många fall har företag främst fokuserat på implementeringenav affärssystemet och i stor utsträckning förbisett efterföljande stadier i systemetslivscykel. Kostnader som uppkommer efter implementeringen kan vara så mycket som 70procent av den totala kostnaden. Samtidigt visar studier att affärssystems potential inteutnyttjas fullt ut.

Den o?kande urbaniseringen inneba?r att dagens avloppssystem blir mer invecklande och komplexa. Fo?r Stockholms stad har det under de senaste 20 a?ren uppra?ttats detaljerade datormodeller fo?r delar av avloppssystemet. Fo?r att ge en helhetsbild av situationen har det mellan a?ren 2003 till 2007 skapats en o?vergripande bera?kningsmodell o?ver Stockholms huvudavloppssystem.

Examensarbetet har genomförts på Siemens Industrial Turbomachinery AB i Finspång. Arbetet innebär modernisering av ventiler till ångturbiner. Uppgiften består av två delar, där den första delen är att modernisera dagens tätningar i spindelgenomföringen. Syftet är att finna en mer vibrationstålig, driftsäker och mindre utrymmeskrävande lösning. Det andra delprojektet är att finna alternativ till dagens tallriksfjädrar i de servomotorer som reglerar ventilen.

This report describes the construction work of a radar antenna for the radar systemCARABAS. CARABAS is a long wave airborne ground radar that has been developed bySAAB Microwave Systems and will now be mounted on a small helicopter, Schweizer 300.The antenna should be able to fold up and down. When the radar is in use the antenna islowered and under transport, start and landing the antenna is folded up. An emergency dropfunction should also be included in the design of CARABAS III.The extent of this report includes construction of the antenna, frame structure attached to thehelicopter, mechanism for folding the antenna up and down and mechanism for emergencydrop function. The mechanical design of the antenna and frame structure is based on modaland stress analysis, vibration measurement of Schweizer 300 and frequency analysis, andcalculations regarding aerodynamic drag and mechanics.The exciting frequencies of the helicopter and accelerations at those frequencies weredetermined by vibration measurement and frequency analysis.

Changes in the environment are affecting the world market, and pressures from several stakeholders? are forcing different enterprises to adjust to the current situation. Farmers? difficult working conditions and environmental impacts of the conventional cotton production in India have been highlighted. The small-scale production that is characterising India?s cotton farmers implies an insufficient competition power.

At the Department of Technology and Built environment at the University of Gävle there was an interest to study GNU Radio, which is an "open source radio project. The project is based on that most of the radio signal processing is made in an ordinary PC. The idea behind this degree project was that in a laptop there are several radio transmitters/receivers that takes space, generates heat and transmit in varied frequency band etcetera. All these radio transmitters/receivers could be replaced with a Software Defined Radio system. It means that one common, general radio hardware is used to different communications such as: WLAN, Bluetooth, GPRS, 3G etcetera. The waveform is generated in the software, which makes the system very flexible.

Den kinesiska marknaden har efter många år av isolering börjat öppnas upp allt mer mot omvärlden. Med inträdet i WTO har utvecklingen de senaste åren gått fort och lagar och regleringar revideras kontinuerligt av den kontrollerande regeringen. Inträdet har inneburit en anpassning till övriga medlemsländer vilket gjort att möjligheterna för företagande i Kina ständigt ökar. Potentialerna på marknaden är stora, vilket många utländska företag redan upptäckt. Trots det är det fortfarande ett begränsat antal svenska företag på marknaden, speciellt detaljhandelsföretag som vänder sig till konsumenter.

During the past few years a vast amount of research has been done to increase the understanding of the complex ecosystem of the Baltic Sea. Modelling and simulations are important tools to increase knowledge of the system. A suitable model must be simple to use and the parameters and variables needed in the model must be easy to access.In this paper a dynamical mass-balance model, CoastMab, which is validated for smaller coastal areas, has been used to predict concentrations and transports of phosphorus in three large coastal areas - the Gulf of Finland, the Gulf of Gdansk and the Gulf of Riga. CoastMab uses ordinary differential equations to regulate inflow, outflow and internal flows. To reflect seasonal variations in temperature and different types of flows the model has a temporal resolution of a month.

In this report a new gear concept is evaluated using the magnetic finite element method (FEM)software MagNet and Ansys as well as the mechanical FEM software Abaqus. The gear conceptis evaluated in terms of maximum torque capability, torsional stiffness, gear ratio and efficiency.ABB Corporate Research has proposed a new gear concept which should be less expensive thangearboxes used today. The new concept is called aMagnetic Harmonic Traction Drive and usesthe principles of a harmonic drive gear to achieve a high reduction ratio. The gear conceptreplaces the wave generator used in traditional harmonic drives with magnets and uses tractioninstead of gear teeth to transfer the torque. The main components in the gearbox are the magnets,the flexspline, the magnetic portion and the circular spline.