Idag använder vi mobiltelefoner mer och mer för att surfa på webbplatser. Det vi för 15 år sedan gjorde med dator gör vi idag med lätthet med en mobiltelefon, till exempel bankärenden och bokar tågbiljetter. I denna studie görs en undersökning på skillnader i hur samma webbplats används på dator respektive mobiltelefon. I uppsatsen betraktas beteenden som längd på besök, vilka knappar som klickas på, hur ofta besök avslutas respektive avbryts. Undersökningen tar hänsyn till hur webbplatsen är utformad med hänsyn till de riktlinjer som idag finns för användarvänlighet på en webbplats. Undersökningen har gjorts på en av Sveriges större matkasseleverantörers webbplats. Syftet med undersökningen är att bättre förstå mobiltelefonanvändarnas behov av hur en webbplats ska vara utformad för att ge mobiltelefonanvändarna en bra användarupplevelse. Datainsamlingen består av en kundundersökning gjord med webbenkät och en analys av databasloggning. Google Analytics används för att hitta skillnader i mobiltelefon- och datoranvändning av samma webbplats. Undersökningen visar att det finns mätbara skillnader i beteende mellan mobiltelefon- och datoranvändning av samma webbplats. Kundundersökningen visar att mobiltelefonanvändarna uppfattar det svårare att använda webbplatsen. Det tar längre tid för mobiltelefonanvändarna att fullfölja flöden. Mobiltelefonanvändarna avbryter oftare flöden än datoranvändarna. Undersökningens metoder kan användas som redskap för att förbättra användarupplevelsen för mobiltelefonanvändarna i och med att resultaten är mätbara och kan mätas igen efter en justering på en webbplats. Ett exempel där metoderna kan användas är vid inloggningen på webbplatsen som undersöks. I undersökningen framkom att 84,5 % av datoranvändarna väljer att logga in när de kommer till inloggningssidan. Motsvarande siffra för mobiltelefonanvändarna är 52,8 %. Man kan fråga kunderna varför de inte loggade in och om de har förslag på förbättringar. Efter kodändringar kan man mäta inloggningsfrekvensen igen och göra en ny kundundersökning. / Today we are using mobile phones more and more for surfing on websites. Things that we did on desktop computers 15 years ago we now do easily on mobile phones, for example banking and booking train tickets. In this thesis I investigate if there are differences in how the same website is used by mobile phones and desktop computers. Behaviors like the length of visits, which buttons are pressed and how often flows are interrupted are investigated. The investigation takes in consideration the guidelines there are today about user-friendly website design. The goal of the investigation is to better understand the mobile phone user’s need of how a website should be designed to give them a better user experience. The data collection includes a customer investigation made by a web survey and analysis of database logging. Google Analytics is used for finding differences in mobile phone usage and computer usage of the same website. The investigation shows that there are measurable differences in the behavior between mobile phone usage and computer usage of the same website. According to the customer investigation the mobile phone users find it more difficult than the computer users to use the website. It takes longer time for the mobile phone users to complete flows. The mobile phone users more often interrupt flows than the computer users do. The methods in the investigation can be used to improve the user experience for mobile phone users, in that the results are measurable and can be measured again after a change has been made on the website. An example where the methods can be used is when logging on to the website in this investigation. This investigation showed that 84.5% of the computer users opt to log in when they get to the login page. The corresponding figure for the mobile phone users is 52.8%. One can ask the customers why they did not log in and if they have suggestions for improvements. The login frequency can be measured again after code changes, and another another customer survey can be done.

Nanocellulose is an interesting natural material thatis gaining interest in the field of materials science, particularly nanocomposites. Depending on the disintegration route, nanocellulose can be isolated either in the form of long and flexible fibres (nanofibrillated cellulose, NFC), or stiff, rod-like crystals (cellulose nanocrystals, CNC). Nanocellulose can be utilized in nanocomposites either as a reinforcement element or as a network matrix due to its ability to form a strong network. In this thesis, nanocellulose based materials are prepared by evaporation of a liquid medium. The key step in this processing route is a good dispersion of the nanoparticles in the selected matrix. Therefore the importance of surface modification in order to ensure favourable nanocellulose dispersion is clarified in avariety of materials systems. In Paper I, poly(methyl methacrylate) (PMMA) based fibres prepared by electrospinning were reinforced with nanofibrillated cellulose. Native NFC appeared to show a good compatibility with PMMA matrix in the electrospinning solution and resulting fibres. Furthermore, a new method for mechanical testing of mats with random fibre orientation as well as aligned fibres was developed. In Paper II, commingled nanopaper structures with carbon nanotubes (CNTs) were prepared. Several surfactants were used to disperse hydrophobic CNTs in water. A nonylphenol phosphate ester (NPPE) was found to work well for both dispersing CNTs in water and providing compatibility with NFC through electrostatic repulsion between the phosphate ester groups of the surfactant and the carboxylate groups of NFC. In Paper III, a new water based route for functionalization of cellulose nanocrystals was developed. In this approach, inspired by organo-modified layered silicates, quaternary ammonium salts were adsorbed. It was demonstrated that different functionalities (alkyl, phenyl, glycidylor diallyl) can be introduced onto the cellulose and the dispersibility in organic solvents was studied. Subsequently, in Paper IV, nanocomposites with poly(vinyl acetate) (PVAc)were prepared. The effect of modification on the degree of dispersion of the CNC within the matrix was studied as well as the strong effects on the properties of the resulting nanocomposites. In Paper V, taking advantage of the entangled NFC network and the possibility to tailor the pore size and surface chemistry, lubricant-infused slippery films and coatings based on NFC were prepared for the first time. / <p>QC 20131016</p>