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This thesis aimed to clarify the essential factors involved in externalising audio over headphones. Extensive research was conducted, examining binaural cues and the latest advancements in the field. A novel approach was proposed, which applied HRIRs and BRIRs on a Mid-Side decomposition. The objective was to enhance frontal externalization while increasing control over centre-panned and side-panned elements. The proposed method underwent rigorous testing in various setups, accompanied by objective and subjective evaluations. The objective measures were then correlated with the findings from the subjective evaluations. Interaural coherence analysis revealed that the BRIR exhibited lower overall coherence values than the HRIR. This was anticipated, considering BRIRs capture room acoustics that impact sound perception compared to anechoic conditions. Introducing simple room acoustics, such as early reflections and reverberation tails, significantly reduces the coherence in higher frequencies for HRIR. Connecting these findings to the conducted listening test, it is observed that lower IC generally corresponded to a wider audio configuration. However, assessing frontal externalization proved challenging. Among the tested configurations, the two BRIR models achieved the most width, with the unsmoothed version performing slightly better. This suggests a tradeoff between externalization and colouration, as the smoothed BRIR model excelled in spectral colouration and preference. For the HRIR, adding room acoustics slightly increased the width. It received lower ratings regarding spectral colouration and was not preferred over the HRIR model without room acoustics. This reinforces the significance of preserving the original spectral characteristics. / Denna avhandling hade som mål att klargöra de väsentliga faktorer som är involverade i att externalisera ljud över hörlurar. Omfattande forskning genomfördes, där binaurala ledtrådar och de senaste framstegen inom området undersöktes. Ett nytt tillvägagångssätt föreslogs, där HRIRs och BRIRs applicerades på en Mid-Sid-uppdelning. Målet var att förbättra frontal externalisering i kombination med mer kontroll över centrerade och sido-justerade element. Den föreslagna metoden genomgick rigorösa tester i olika inställningar, åtföljda av objektiva och subjektiva utvärderingar. Objektiva mätningar korrelerades sedan med resultaten från de subjektiva utvärderingarna. Analysen av interaural koherens visade att BRIR hade lägre övergripande koherensvärden än HRIR. Detta var väntat eftersom BRIR fångar upp rumslig akustik som påverkar ljuduppfattningen jämfört med anekoiska förhållanden. Att införa enkla rumsliga akustikegenskaper, såsom tidiga reflektioner och efterklangssvansar, minskar signifikant koherensen i högre frekvenser för HRIR. Genom att koppla samman dessa resultat med de genomförda lyssningstesterna kan man observera att lägre interaural koherens generellt korresponderade med en bredare ljudkonfiguration. Dock visade det sig vara utmanande att bedöma frontal externalisering. Bland de testade konfigurationerna uppnådde de två BRIR-modellerna störst bredd, där en icke spektrum-justerad version presterade något bättre. Detta tyder på en avvägning mellan externalisering och färgning, eftersom den slätade BRIR-modellen presterade bra i både färgning av ljud och preferens. För HRIR ökade bredden något genom att lägga till rumslig akustik. Den fick lägre betyg avseende spektralfärgning och föredrogs inte framför HRIR-modellen utan rumslig akustik. Detta understryker vikten av att bevara de ursprungliga spektrala egenskaperna.

In light of climate change and global warming, the application of sustainability principles in everyday life is becoming a necessity in a variety of circumstances. In an increasingly digital world with pandemic ramifications, optimal functionality and accessibility inside digital platforms are a top priority. There is a tremendous demand for essential digital services that generate better standards and adapt to societal conditions, improve conditions for society, and facilitate day-to-day workflow. The emphasis on factors such as usability and accessibility raises the question of whether there is a comparable emphasis on sustainability in development. Green IT is a concept that is gaining popularity, namely Green User Experience or the already established term SID, Sustainable Interaction Design.  This study investigates the usability of municipal websites based on a score derived from comparing the findings of assessments of the websites' sustainability in a broader context. Using a qualitative approach, the data is evaluated and compared with the approaches and justifications of various municipalities. This information was gathered through interviews and analysed using Socio-technical Systems Theory. The outcome is intended to justify a major organisational shift and encourage a greater emphasis on working sustainably in website design and development. In relation to the digital world and the public sector, the study revealed a tendency towards the need for guidelines in order to set a clearer norm from a sustainability standpoint. A more sustainable user experience, where sustainability for municipal websites is viewed as an impact of usability and enhancements that are helpful to the earth as a whole. / Att tillämpa ett hållbarhetstänk i vardagen är mer och mer utbrett, med klimatförändringar och global uppvärmning är det ett krav som även ses i andra sammanhang. I en alltmer digital värld med efterdyningar från en pandemi, där krav på optimal funktionalitet och tillgänglighet inom digitala plattformar prioriteras. Ett stort behov för kritiska funktioner som skapar förutsättningar för samhälle, levnadsstandard för människor och normal arbetsgång sätter fokus på hållbarhet i den utvecklingen. Grön IT är ett begrepp som blivit känt, men inom informationsteknik och digital design finns ett ökat fokus på en relaterad infallsvinkel, nämligen grön UX eller den redan etablerade termen SID, som står för hållbar interaktionsdesign.  Studien undersökte användbarhet på kommunala webbplatser grundas i en rankning som kommit av att jämföra resultat från mätningar över webbplatsernas hållbarhet i ett större perspektiv. Genom en kvalitativ ansats tolkades och jämfördes de olika kommunernas tillvägagångssätt och argument, från data som samlades via intervjuer och analyserades utifrån Socio-technical systems theory. Resultatet hoppas kunna motivera en större organisatorisk förändring och gentemot ett mer hållbart arbete vid design och utveckling av webbplatser. Studien visade på tendenser till behov efter riktlinjer för att kunna grundlägga en tydligare standard kring hållbarhetsperspektiv när det gäller den digitala världen och offentlig sektor. En mer grön användarupplevelse, där hållbarhet för kommunala webbplatser kan ses som en effekt av användbarhet och som förbättringar för hela planeten.

This thesis deals with a field of information modeling and its relation to systems architecture. It is divided into two notional parts -- theoretical (first and second chapter) and practical (third and fourth chapter). First chapter explains the meaning of the term 'information model', compares it to the term 'data model' and then introduce its practical use in an enterprise modeling. It also defines the term of 'systems architecture' in its broad meaning and reduces it to three narrow meaning -- enterprise architecture, information architecture and information systems architecture, while it explains their relation to the information modeling. Finally this chapter provides the base for information model implementation methodology created later in the practical part of this thesis. Second chapter introduces architecture framework called TM Forum Frameworx specialized for a telecommunication services provider. It consists of three standards for business process, information and application architecture. The second one defines specific information model which is described partly in the second chapter and partly in the appendix B of this thesis. Third chapter describes the first of two contributions of this thesis - the information model implementation methodology. This methodology is applicable to any implementation of an information model. Three sections of this chapter contains diagrams and description of three phases of the methodology - pre-implementation phase, implementation phase and post-implementation phase. In the end of the chapter there is a table containing outputs of every single activity performed during all the phases. Fourth and last chapter then describes and evaluates real implementation of the information model from TM Forum Frameworx in the systems architecture department of an enterprise providing telecommunication services. This implementation based on the created methodology and its successful results then became the second contribution of this thesis.

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The project elaborates design opportunities for a future practice that could promotealternative sustainable lifestyles on waste handling through up-cycling activities. It doesthis on a small scale through engagement in the local communities of the Hildaneighborhood and Segepark students’ accommodations in Sweden. To thesecommunities, creative-up-cycling is explored which it introduced here as an approachwhere neighbors can participate in making new things from leftover materials. Throughthis work creative-up-cycling is a proposed recommendation for a possible service systemon how to share the leftover materials in the local resident’s communities, as well as, howto remake the items no longer needed.The empirical studies explore maker culture lifestyles and include how to find leftovermaterials, tools, space, and skills in order to guide people in creative-up-cyclingalternatives. These creative activities also build social relationship via the integration ofmultidisciplinary citizens who are living in the same community and explorations weredone on how could we elicit the skill sets from those people? What is a useful skill set inthis area today? Values like mutual physical experience, reciprocity, and ownership couldalso be found along the empirical workshops in this project. Additionally, this reportshows some interesting findings pointing towards the design process and the suggestionsof design elements; ‘Co-storage’, ‘Mix and Match furniture shop’, and ‘Renovation andup-cycling’ concept elements.Participatory design (designing with people) has been the core approach in this project.Additionally, I have been influenced by user-centered design, as well as service designapproaches in order to comprehend the services, system and activities of recycling andup-cycling in cities like: SYSAV, STPLN, Cykelköket, Återskapa, Toolpool. The findingpresented here are examples of practices that could make up the composition of recyclingand up-cycling activities in future local communities.