The project enables process control of healthcare equipment through the social network service Twitter. Machine operators should be able to control machines through their computer, tablet or mobile device, without physically having to be in contact with the machine. The project solution has been designed by programming against Twitter's application programming interface, that is, utilizing the functionality that Twitter offers. The reason is to use functionality that already exists and circumvent the maintenance of an application. The project has consolidated Twitter functionality with GE Healthcare's internal software system into a unique solution that enables remote control. / Projektet möjliggör processtyrning av maskiner inom hälso- och sjukvården via den sociala nätverkstjänsten Twitter. Maskinoperatörer ska kunna styra maskiner via deras dator, surfplatta eller mobila enhet, utan att närvara vid maskinen. Projektets lösning har konstruerats genom att programmera mot Twitters applikationsprogrammeringsgränssnitt, det vill säga ta del av funktionalitet som Twitter erbjuder. Anledningen är att använda funktionalitet som redan existerar samt kringgå underhållandet av en applikation. Projektet har sammansvetsat Twitter-funktionalitet med GE Healthcares interna mjukvarusystem till en unik lösning som möjliggör processtyrning på distans.

Decentralized solar energy is solar energy produced close to where it will be used, rather than at a large facility elsewhere and sent through the national grid. This project involves collecting data from decentralized solar facilities with data collection support, as well as visualizing the data in a format that is adjustable and understandable by everyone. The goal is to share knowledge about renewable energy sources, specifically solar panels and how these can be used in the most efficient way. The authors, together forming Sun Labs, developed a web application with capabilities such as graphing energy production from solar facilities. This visualization was done in a creative and intuitive environment for everyday users as well as professionals. Throughout the design process of the portal we designed for smaller screens first and the larger screens last. This philosophy is called mobile first design and was key to the development of the portal.  The evaluation methods of this project include: UX-testing, unittesting, interviews and manual testing. The evaluation results show that Sun Labs successfully implemented a cross-platform application with the aforementioned capabilities. / Decentraliserad solenergi är solenergi producerad där den är tänkt att användas, snarare än vid en avlägsen stor anläggning som sedan transporteras via det nationella nätet. Projektet omfattar insamling av data från decentraliserade solanläggningar med stöd för datainsamling, samt visualisering av data i ett format som är anpassningsbart och förståeligt för alla. Målet är att dela kunskap om förnybara energikällor, speciellt solpaneler och hur dessa kan användas mest effektivt. Författarna, som tillsammans bildat Sun Labs, utvecklade en webbapplikation med möjligheter att visualisera energiproduktion från solanläggningar i diagram. Denna visualisering gjordes på ett kreativt och intuitivt sätt för vardagliga användare såväl som professionella användare. Hela portalens designprocess konstruerades för mindre skärmar först, för att sedan anpassas till större skärmar. Denna filosofi kallas “mobile first”-design och låg till grund för portalens utveckling. Utvärderingsmetoderna för detta projekt har inkluderat: UX-testning, enhetstestning, intervjuer och manuell testning. Resultaten visar att Sun Labs framgångsrikt implementerat en plattformsoberoende applikation med ovan nämnda funktioner.

This master thesis was done at Uppsala Clinical Research Center (UCR). UCR have recently developed the technical platform QReg 5 for managing quality registries. UCR have been in contact with several international organizations interested in collaborating with UCR because of their expertise within quality registries as well as their technical competence. UCR have a complicated owner structure as well as organizational structure, as they are owned by Uppsala University and Uppsala County Council. The purpose of this master thesis was to present how QReg 5 could be commercialized under UCR's preconditions. In order for the internationalization plans to be successful, it was shown that the shared ownership of UCR needs to become clearer. By taking advantage of the possibilities with the new development section at UCR, the management of the contacts will be more efficient. Potential competitors for UCR are registry centers that have created their own technical solutions, large software companies, Life Science related organizations (e.g. hospitals), the organizations that UCR license QReg 5 to, as well as software companies creating electronic medical records. The most interesting customer segment for UCR are organizations with technical competences, which are placed in countries were quality registries are not yet in use.

The scope of this thesis is to investigate methods of recording, processing and analysing sound data from wheel brake testing in dynamometers with focus on detecting and measuring squeal. The desired outcome is a method that Scania can use to record and analyse brake sound. A literature study was made to find relevant methodologies and tools proposed in papers, books and industry standards. These methods were tried and evaluated by recording and analysing real sound data and other signals from one of Scanias dynamometers. The resulting method includes directions on what hardware to use, how to set it up and an algorithm that computes a spectral limit based on normal sound data. This limit is then used as reference when evaluating other recordings. To increase signal to noise ratio, an adaptive filter is proposed to attenuate background noise in the recordings, in particular from the dynamometer and ventilation system. The conclusion is that it is possible to find squeal using spectral limits based on normal data. The performance of the algorithm is a compromise between being very effective but rather complex, or slightly less effective but also less complex. Its performance is also highly dependent on how squeal is defined. A very narrow definition will only find certain types of squeal while a more broad definition will find more squeal, but also potentially mislabel some recordings.

Object tracking is a well-studied problem within the the area of image processing. The ability to track objects has improved drastically during the last decades, however, it is still considered a complex problem to solve. The importance of object tracking is reflected by the broad area of applications such as video surveillance, human-computer interaction, and robot navigation. The purpose of this study was to examine, evaluate, and make a summary of the most common object tracking methods. In this paper a thorough review of the object tracking process is presented. This includes selection of object representation, object features, methods for object detection, and methods for tracking the object over succeeding frames. A summary of the object tracking methods covered in this paper is presented in the result section, including advantages, disadvantages, and for which context each method is suitable for.

A lot of different techniques can be used to determine the position of objects in underground mines. What they have in common is that they’re very expensive or require a specific infrastructure. In this master’s thesis the goal was to produce an algorithm to increase the positioning on vehicles in a cheap and easy way by only using gyroscopeand dead reckoning. To illustrate the movement of the vehicle in the underground mines the Mobilaris Mining Intelligence system (MMI) was used. The algorithm is designed to be used alongside the current algorithm that locates objects by using their RSSI value from the Cisco Access points in the underground mine. With this information it’s possible to relocate a vehicle if the algorithm ”chose” the wrong way. Testing shows that this is a good way to increase the positioning of vehicles in underground mines.

The aim of this thesis is to investigate possibilities to reduce primary steam consumption of the integrated pulp and paper mill in Obbola. For this purpose, a pinch analysis has been performed. The thesis has been carried out on site and necessary data for the analysis was produced mainly using the sensors installed for controlling the process. Based on the data, a representation of the heat exchanges at the mill was obtained and from this emerges an understanding of how optimized the heat exchange is. From the analysis, it was found that the energy savings potential amounts to 7 MW, which corresponds to 6% of present steam consumption of approximately 112 MW. One of the identified pinch violations was the flue gases in the recovery boiler used to preheat combustion air and process ventilation when it can be used to meet a thermal demand at higher temperatures or potentially to generate steam, the latter has not been investigated. Steam preheating of air to the paper dryer, steam preheating of water that is used to thaw logs and steam that is used in some of the process ventilations were also among the identified violations. Possible measures to optimize heat exchange and eliminate pinch violations have been investigated. These include flashing of paper mill condensate to replace the live steam in the air preheaters to the paper dryer and replace this thermal energy with secondary heat in the feed water treatment plant. As well as using part of the heat from the flue gas cooling system to preheat feed water. Increasing the operational temperature in the water treatment plant turned out to be possible regardless of whether a flash is introduced or not. The savings with contra without the flash would amount to 1.13 MW and 0.85 MW, respectively, and the net heat savings of a reconstruction is only 0.28 MW. The heat that can be released from the flue gas cooling system corresponds to 0.46 MW and is expected to be higher in the summer when heat necessity in other ends of the system decreases. To suggest optimization of heat exchanges at the mill, it was also investigated how much excess of warm and hot water was that present in the secondary heating system. The investigation showed that if the temperature in the warm water tank would be regulated, an excess of hot water would be sufficiently large to provide secondary heat to the optimization measures discussed and to provide for all ventilations currently using live steam. In all cases profitability should be investigated and for the case of any ventilation consideration should be given to distance from a secondary heating source and if there is a glycol circuit present or not.

This bachelor thesis examines the impacts of installed microgeneration of PV power in the distribution grid. The thesis examines the selected distribution grids power quality and how it is affected in terms of exceeding currents, voltages and reverse power flows and how the future trend of microgeneration of PV power will develop. A case study is made on Gotland with the support of the distribution grid owner, GEAB. Three of GEAB's distribution grids with different customer configurations and grid structures are being used to create different case scenarios. The production from the PV plants is calculated with production data from a project that GEAB performed with PV plants but dismantled in 2016. The Newton-Raphson power flow method is used to run the simulations of the grids with different amount of installed PV power. The results show that exceeding maximum current is the first parameter to limit and affect the power quality for all grids. After this the three grids can handle different amounts of installed PV power with respect of the remaining parameters. The simulations also show that losses in the grid are reduced due to installations of PV plants, although their small magnitude do not make them a significant aspect to consider when evaluating microgeneration in the distribution grid. When comparing to future scenarios it is concluded that the grids are dimensioned to handle a various amount of installed microgeneration without the power quality being affected.  To analyse the sensitivity of the results a sensitivity analysis is performed on the slack node voltage by alternating the voltage level. The result indicates that a higher slack node voltage gives more exceeding voltages for the city power grid and the two rural grids.

Many biological and artificial systems are made up from similar, relatively simple elements that interact directly with their nearest neighbors. Despite the simplicity of the individual building blocks, systems of this type, network systems, often display complex behavior — an observation which has inspired disciplines such as artificial neural networks and modular robotics. Network systems have several attractive properties, including distributed functionality, which enables robustness, and the possibility to use the same elements in different configurations. The uniformity of the elements should also facilitate development of efficient methods for system design, or even self-reconfiguration. These properties make it interesting to investigate the idea of constructing mechatronic systems based on networks of simple elements. This thesis concerns modeling and optimal design of a class of active mechanical network systems referred to as Neuro-Mechanical Networks (NMNs). To make matters concrete, a mathematical model that describes an actuated truss with an artificial recurrent neural network superimposed onto it is developed and used. A typical NMN is likely to consist of a substantial number of elements, making design of NMNs for various tasks a complex undertaking. For this reason, the use of numerical optimization methods in the design process is advocated. Application of such methods is exemplified in four appended papers that describe optimal design of NMNs which should take on static configurations or follow time-varying trajectories given certain input stimuli. The considered optimization problems are nonlinear, non-convex, and potentially large-scale, but numerical results indicate that useful designs can be obtained in practice. The last paper in the thesis deals with a solution method for optimization problems with matrix inequality constraints. The method described was developed primarily for solving optimization problems stated in some of the other appended papers, but is also applicable to other problems in control theory and structural optimization.

The increasing use of bre-reinforced composite materials in the manufacturing of high performance structures is primarily driven by their superior strength-toweight ratio when compared to traditional metallic alloys. This provides the ability to design and manufacture lighter structures with improved mechanical properties. However, the specic manufacturing process of composite structures, along with the orthotropic material properties exhibited by bre-reinforced composite materials, result in a complex structural design process where a number of dierent design parameters and manufacturing issues, which aect the mechanical properties of the composite structure, have to be considered. An ecient way to do this is to implement structural optimization techniques in the structural design process thus improving the ability of the design process to nd design solutions which satisfy the structural requirements imposed on the composite structure. This thesis describes a two phase composite structure optimization method based on a novel material homogenization approach. The proposed method consists of a stiness optimization problem and a lay-up optimization problem, respectively, with the aim to obtain a manufacturable composite structure with maximized stiness properties. The homogenization material approach is applied in both optimization problems, such that the material properties of the composite structure are homogenized. In the proposed method the stiness optimization problem provides a composite structure with maximized stiness properties by nding the optimal distribution of composite material across the design domain. The aim of the lay-up optimization problem is to obtain a manufacturable lay-up sequence of bre-reinforced composite plies for the composite structure which, as far as possible, retains the stiness properties given by the stiness optimization problem. The ability of the composite structure optimization method to obtain manufacturable composite structures is tested and conrmed by a number of numerical tests.