Image segmentation has many areas of application, one of them being in medical science. When segmenting an image, there are many automatic approaches that generally do not let the user change the outcome. This is a problem if the segmentation is badly done. On the other hand there is the manual approach which is slow and cumbersome since it relies heavily on the users effort. This thesis presents a semi-automated approach that allow user interaction and computer assisted segmentation, which was realized in a hi-fi prototype. The prototype made use of SLIC superpixels which the user could combine with interactions to create segments. The prototype was iteratively developed and tested to ensure high usability and user satisfaction. The final prototype was also tested quantitatively to examine if the process of segmenting images had been made more efficient, compared to a manual approach. It was found that the users got a better result in the prototype than the manual if the same time was spent segmenting. Although it was found that the users could not segment images faster by using the prototype than the manual process, it was believed that it could be made more efficient with superpixels that followed the natural border of the image better. / Bildsegmentering har många användningsområden, där ett av dem är inom medicinsk foskning. Det finns många automatiska algoritmer för att segmentera bilder som generellt inte låter användaren ändra resultatet av segmenteringen. Detta är problematiskt när segmenteringen blir dåligt gjord. Däremot finns det helt manuella tillvägagångssätt som är mer besvärliga och tidskrävande eftersom de kräver mer utav användaren. Det här arbetet presenterar ett semi-automatiskt tillvägagångssätt som tillåter användarinteraktion tillsammans med dator-assistans för att segmentera bilder. Det semi-automatiska tillvägagångsättet realiserades i en hi-fi prototyp som använder SLIC superpixlar. Superpixlarna kan slås samman genom användarinteraktion där de sammanslagna superpixlarna utgör segmenten. Prototypen utvecklades och testades iterativt för att uppnå hög användbarhet och nöjda användare. Prototypen testades även kvantitativt för att undersöka om segmenteringsprocessen hade effektiviserats tidsmässigt jämfört med redan existerande mjukvaran. Det visade sig att användarena fick högre precision i segmenteringen vid användning av prototypen jämfört med den existerande mjukvaran när samma tid lades. Även om det visades att segmenteringen inte var mer tidseffektiv så troddes det att tidseffektiviteten i prototypen kunde ökas genom att superpixlarna föjde de naturliga områdena bättre i bilden.

Den här rapporten redovisar resultat och slutsatser från arbets- och utvecklingsprocessen för webbapplikationen Studentkassen. Studentkassen är en e-handelsbutik där kunden får möjlighet att skräddarsy sin egen matkasse utifrån färdiga recept. Utvecklingen har fokuserats kring designval och funktionalitet för att undersöka hur en användbar webbapplikation för onlineförsäljning av matkassar ska utformas. Arbetsprocessen har följt metodiken Scrum som resulterade i effektivt arbete tack vare kontinuerliga iterationer. Användbarhetsutvärderingar utfördes för att verifiera att applikationens design och funktionalitet var lämplig. I rapporten redogörs för applikationens design- och funktionalitetsval. Detta ligger till grund för rapportens diskussioner och slutsatser. För att uppnå användbarhet av en webbapplikation för försäljning av matkassar ska köpprocessen vara effektiv, vilket kan uppnås med en genomgående konsistent design där navigationen kräver få klick. / This report outlines the results and conclusions from the work process and development process of the web application Studentkassen. Studentkassen is an e-commerce, whereupon the customer may customize their own bag of groceries from a list of recipes. The development focused on choices of design and functionality in order to research how a web application for online sales of grocery bags should be designed to achieve usability. Today, usability within web development is trending, which has driven the framing of question of this report. The work process followed the Scrum methodology, which resulted in an efficient working procedure due to continuous iterations. Usability evaluations were conducted, with the purpose of verifying the suitability of the web application’s design and functionality. In the frame of the project, the design and functionality decisions within the application are outlined. This lays the foundation of the results and reflections within the report. To achieve usability of a web application for online sales of grocery bags, an efficient purchasing process is necessary, which is acquired through a consistent design where few clicks are required to navigate.

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To ensure the quality of important services, high availability is critical. One aspect to be considered in availability is the downtime of the system, which can be measured in time to recover from failures. In this report we investigate current research on the subject of repair time and the possibility to estimate this metric based on relevant parameters such as hardware, the type of fault and so on. We thoroughly analyze a set of data containing 43 000 failure traces from Los Alamos National Laboratory on 22 different cluster organized systems. To enable the analysis we create and use a program which parses the raw data, sorts and categorizes it based on certain criteria and formats the output to enable visualization. We analyze this data set in consideration of type of fault, memory size, processor quantity and at what time repairs were started and completed. We visualize our findings of number of failures and average times of repair dependent on the different parameters. For different faults and time of day we also display the empirical cumulative distributionfunction to give an overview of the probability for different times of repair. The failures are caused by a variety of different faults, where hardware and software are most frequently occurring. These two along with network faults have the highest average downtime. Time of failure proves important since both day of week and hour of day shows patterns that can be explained by for example work schedules. The hardware characteristics of nodes seem to affect the repair time as well, how this correlation works is although difficult to conclude. Based on the data extracted we suggest two simple methods of formulating a mathematical model estimating downtime which both prove insufficient; more research on the subject and on how the parameters affect each other is required.

The goal of this thesis is to produce a generic database system for an IT-company calledNinetech. In this context generic means the database system can accept any input, withinreason, without one having to create a specific database schema beforehand. The prototypewill consist of a database, web service and a dynamic-link library. The three aforementionedcomponent’s design and function will be explained in chapter 2, alongside with the difficul-ties surrounding manipulating arbitrary data. The prototype’s performance is evaluated inchapter 3 and conclusions are drawn in chapter 4.

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The growth of open source softwares (OSS) is playing a big role in the industry. The important contributions that have been generated over the past years are found to be useful for software developers. The development method used to produce open source software is different in that it participates programmers who are interested in coding. On the other hand, software complexity is one aspect that should be raised during the development of software. It is considered as one factor linked with different characteristics of quality in software. Since there are multiple developers located in different places who commit their codes to repositories, there is a need to understand the complexity of OSS before using them.A systematic use of object oriented design metrics can be useful in helping to solve this. In this paper, the complexity of the most popular open source softwares is investigated by the use of statistical assessment of the metrics. In order to facilitate this, it includes a case study to investigate complexity of ten popular projects that are available sourceforge.The case study has shown that applying software metrics that would measure the different aspects of software would be useful in analyzing, studying and improving the complexity of open source software.

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Some people do not have the opportunity to visit a physical exhibition because of limited time or long travelling distances, it is here the need for a web-based exhibition arises. This dissertation describes the development of an interactive web-site representing a part of a physical exhibition of over 200 interviews on different peoples immigration to inner Scandinavia. The interviews contain text, audio clip, pictures and video clip. The website contains modern programming technologies such as HTML5, ASP.NET MVC3, SQL, JavaScript and jQuery. A cover of the technologies used and how the project has been designed and implemented is explained in the dissertation. In the end of the dissertation we discuss about how the result of the project follows the goals we set up in the start phase. The result of this project is an interactive and easy to use web-site showing a part of the physical exhibition online. An easy administration to insert new information and edit existing without any major computer knowledge.

The management of information is a significant competitiveness in companies. Companies stored and save information every day, and it is very common to save de information in different sources. This makes de management of information complex. To mange, monitor and analyze the information, companies can use a system called Business Intelligence. BI system is an analytical system that extracts and converts data into useful information that helps employees to make informed decisions. My purpose was to identify success factors that affect the use of a BI system. The purpose was also to present the success factors you need to consider within the use of a BI system. The study was based on a qualitative method where I Interviewed companies using BI systems and consultant that are experts in the area. I did this because I wanted to see how the use of the BI system differs from what the author writes. I was then able to identify success factors that affect the use of a BI system. The result I came up with is that learning and data quality are critical success factors which are important to consider within the use of a BI system. I have also been able to identifysuccess factors that are known in the use of BI systems.