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  • 301.
    Denham-Smith, John
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Harvidsson, Pontus
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Drivers and Barriers concerning Adoption of Cloud Computing: Focus on Strategic Decision Making2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Cloud computing is seen as the new IT paradigm and the biggest development of the decade in computing. The term was commercially formed in 2008 but the technology has been used earlier. Modern enterprises rely greatly on information technology and as it is changing, enterprises need to change with it. The view on ICT-strategy is evolving and becoming more incorporated with business strategy. Cloud computing has grown because of its many benefits, however there are drawbacks which hinders the technology from being widely adopted. This makes strategic decisions on whether to adopt cloud services or not difficult. This thesis provides aspects on drivers and barriers concerning adoption, with connection to ICT-strategy and how they affect medium-sized enterprises. As conditions regarding cloud computing are constantly changing this thesis aims to provide new insight on what drives enterprises to adopt cloud computing, as well as what hinders them. This qualitative study has used semi-structured interviews together with scientific articles and books to reach a conclusion of what enterprises face when constructing a successful ICT-strategy.

  • 302.
    Desaix, Mats
    et al.
    University of Borås, School of Engineering.
    Anderson, D
    Lisak, M
    Nonlinear Schrödinger Solitons with non-zero velocities emerging from real symmetric initial conditions2009Conference paper (Refereed)
    Abstract [en]

    Solutions of the nonlinear Schrodinger equation for initial conditions in the form of two separated sech-shaped in-phase pulsed,; are analyzed. It is found that; this initial condition, with appropriate amplitude, may give rise to, not; only stationary solitons, but also to symmetrically separating solitons, if the initial distance of separation is large enough. The condition for the generation of a separating soliton pair is derived from the Zakharov-Shabat eigenvalue problem using a variational approach.

  • 303.
    Desaix, Mats
    et al.
    University of Borås, School of Engineering.
    Andersson, Dan
    Lisak, Mietek
    Eigenvalues of the Zakharov-Shabat scattering problem for two separated sech-shaped pulses2008In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 372, no 14, p. 2386-2390Article in journal (Refereed)
  • 304.
    Dessne, Petter
    University of Borås, School of Business and IT.
    Grönt energisamarbete kan rädda tusentals från svältdöden2011In: NewsmillArticle in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    I Durban diskuteras i dagarna inte bara koldioxidutsläpp utan också hur man bäst tar tillvara den enda procent av världens vatten som är tjänligt dricksvatten. Att värna om befintligt sötvatten är viktigt, men det finns också ett annat sätt: extrahera dricksvatten från havet med den gröna tekniken OTEC. Bara några mil från ökenområdena ligger Afrikas kust och OTEC kan ge både elektricitet och tusentals kubikmeter sötvatten varje dygn. Projektet OTEC Africa (www.otecafrica.org) syftar till att åstadkomma just detta.

  • 305.
    Dessne, Petter
    University of Borås, School of Business and IT.
    Gästblogg: Kundkortens död ger insikt i kundbeteenden2013In: Retailingresearch.blogspot.comArticle in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Gästblogg: Kundkortens död ger insikt i kundbeteenden Du drar på dig dina favoritjeans en kall februarimorgon. Tyvärr verkar jeansen krympa något för varje kvartal och nu får inte längre plånboken plats. Varför? Jo, för att den är proppfylld med kundkort och kvitton. På busshållplatsen en halvtimme senare inser du att din överfulla plånbok blev kvar på sängbordet och du får vända hem för att hämta plånboken och ta nästa buss. På väg hem från jobbet går du in i en klädbutik för att kompletteringshandla några par strumpor. Framme i kassan ombeds du plocka fram kundkortet, som över huvud taget aldrig fått plats i plånboken och som du därför glömt hemma. Eller så har du det med dig men orkar inte leta reda på kortet för så små belopp. Du går sedan förbi din vitvarubutik men går inte in för att titta på en ny spishäll eftersom vitvarukedjans poängbaserade kundkort ligger i byrålådan. Historien ovan visar hur problemfylld vardagen blivit på grund av kundkorten. Problemet är välkänt och branschorganisationer för handel och bank har då och då diskuterat införande av ett gemensamt kundkort, som du alltså skulle kunna dra oavsett om du köper mat, bensin, strumpor eller spishällar. Tyvärr har aldrig något sådant kort slagit igenom. Foto: M Sundström Sverige är ett föregångsland inom IT-lösningar för handel (som exempel kan nämnas att ICA är störst i världen på självscanning). Intresset för analys av stora datamängder – det som kallas ”big data” – för att se hur kunder beter sig är också väldigt stort just nu. Därför bör vi kunna dra nytta av Sveriges position som världens mest IT-mogna land och studera kundbeteenden genom att få in så stora mängder köpdata som bara är möjligt. Ett enkelt och för kunden smidigt sätt att göra det är att avskaffa kundkorten, vilket kan låta motsägelsefullt. Min framtidsvision är följande: När det är dags att betala i en butik får du frågan om du vill ansluta dig som kund (precis som idag). Skillnaden är att du nu inte får något specifikt kort, utan alla inköp lagras per automatik i butikens databas när du drar ditt kontokort, såvida du inte trycker in knappen ”Lagra ej uppgifter”. Butikens databas kan sedan kopplas mot andra kedjors databaser för att skräddarsy erbjudanden eller analysera köpdata. Med systemet kan du via en särskild webbsida se alla dina inköp i de butiker du handlar och får därmed en överlägsen inblick i din hushållsekonomi. Du behöver heller aldrig bry dig om kvitton eftersom dina inköp enkelt kan plockas fram från databasen. Samtidigt ökar information om småköp (strumporna) så att handlaren kan utröna hur små köp kan leda till större. Handlaren slipper dessutom missa oplanerade sällanhandelsköp (spishällen). Dessutom kan flera kedjor samarbeta med ett gemensamt system: Den som köper en resa vill kanske ha erbjudanden om badkläder. När kunden får större incitament att betala med kort minskar också kontanthanteringen. Det system som beskrivits ovan är idag verklighet för den som är ICA-kund. Tekniken finns alltså, och kompetens inom big data, systemutveckling och kundbeteenden finns faktiskt inom SIIR. Frågan är om viljan finns hos kunder men framför allt hos företrädare för Sveriges handlare. För min egen del vill jag gärna slippa bära omkring på en massa kundkort och kvitton. Eller att någon skänker mig ett par nya jeans då och då. Frekvent gästbloggare//Petter Dessne

  • 306.
    Dessne, Petter
    University of Borås, School of Business and IT.
    Hållbarhetsredovisning: ett verktyg för smartare konsumenter2013Other (Other (popular science, discussion, etc.))
    Abstract [sv]

    Hållbarhetsredovisning - ett verktyg för smartare konsumenter Hållbarhetsredovisningar ger oväntade möjligheter för handel och konsumenter Högskolan i Borås rektor Björn Brorström och miljösamordnare Birgitta Påhlsson har gemensamt att de båda är företagsekonomer med redovisning som specialområde. För en tid sedan höll de ett gemensamt seminarium om hållbarhetsredovisningens (HR) snabba framväxt och kommande utmaningar. En HR är ofta en berättelse i fritext, helt enkelt en skriftlig redogörelse över vad som skett i en organisation under året inom ekologiska och sociala aspekter av hållbar utveckling. Ett problem som Björn, Birgitta och andra forskare brottas med är att klä hållbarhetssträvanden i siffror, för att på så sätt finna metoder att införliva dem i årsredovisningarnas finansiella rapportering. Jag ser två sätt att lösa detta problem på, där åtminstone det ena alternativet kan vara intressant för handelsforskningen och ge avtryck på framtidens handel. Det första alternativet är det mest självklara och det enklast genomförbara. Den offentliga sektorn omsätter stora belopp (500 miljarder per år i Sverige, 15 000 miljarder i EU). Om all offentlig upphandling skulle tvingas ta hänsyn till HR skulle hållbarhetsaspekter mycket snart hamna högt på dagordningen hos åtminstone stora och medelstora företag. Problemet kan alltså lösas genom att man vänder på det: siffrorna behövs helt enkelt inte. En sådan lösning kräver dock att man ser till vad redovisningen syftar till, snarare än att skapa en optimal redovisning i sig. Det andra sättet är mer komplicerat men skulle ge konsumenter ökad inblick i vad de köper och ökad makt att välja bort varor som är dåliga för natur och hälsa. Idén bygger på att varje varas ingående komponenter (t.ex. en knappsats i en mobiltelefon) får en viss ”straffpoäng” utifrån parametrar som materialåtgång, miljöeffekter av transporter, fabriksarbetares situation etc. För varje led i kedjan ökar poängen, på samma sätt som moms byggs på successivt. För konsumenten redovisas sedan poängen på prislappen. Slutkunden kan därmed enkelt jämföra, säg, konkurrerande mobiltelefoner från Apple och Samsung, och se vilken som är bäst ur ett hållbarhetsperspektiv. Appen Shopgun - ett exempel från Göteborg om hur konsumenter kan köpa bättre och justare livsmedel Ett sådant system skulle inte vara trivialt att införa, men faktum är att de flesta data redan finns tillgängliga. Som exempel kan nämnas att alla moderna fabriker lär ha system för att redovisa hur mycket tid som läggs ned på respektive produktslag. Som handlare skulle ett poängsystem ge mängder av möjligheter: •Konsumenten skulle t.ex. kunna se att en viss vara av hög kvalitet ger mindre avtryck på miljön än en billigare vara kanske gör, särskilt om förväntad livslängd räknas in. •Kedjor som ICA och Coop, som är världsledande på att arbeta med kunddata, skulle kunna ge specialerbjudanden och kundrabatter om man väljer de miljöriktiga alternativen. Listan kan göras lång. Oavsett vilken väg man väljer att gå uppstår följdfrågor som verkar intressanta att forska vidare på och här kan SIIR komma in. Tänk om man kunde presentera ett projekt mellan exempelvis SIIR, Borås kommun och det lokala näringslivet med kundundersökningar utifrån ett poängsystem! Vinsterna med framför allt detta andra sätt är många. Världen mår bättre. Fabriksarbetares vardag kan underlättas. Handlare kan erbjuda annat än låga priser. Konsumenterna kan göra aktiva val för miljön. Och som grädde på moset får ekonomerna mängder av nya siffror att pryda årsredovisningarna med! Gästbloggare//Petter Dessne

  • 307.
    Dessne, Petter
    et al.
    University of Borås, School of Business and IT.
    Dessne, Karin
    University of Borås, Swedish School of Library and Information Science.
    Miljöstrategiska val för ett stärkt Borås2012In: Borås Tidning, ISSN 1103-9132Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Vindkraften, stadstrafiken och järnvägen utgör tre problem eller tre möjligheter för Borås framtid. Vi föreslår några strategiska val för att stärka vår hemregion.

  • 308.
    Dessne, Petter
    et al.
    University of Borås, School of Business and IT.
    Fachina, Vicente
    University of Borås, School of Business and IT.
    Golmen, Lars G.
    University of Borås, School of Business and IT.
    Miller, Alan K.
    University of Borås, School of Business and IT.
    Panchal, C. B.
    University of Borås, School of Business and IT.
    Hammar, Linus
    University of Borås, School of Business and IT.
    Jamaluei, Zahra Yadali
    University of Borås, School of Business and IT.
    Duckers, Les
    University of Borås, School of Business and IT.
    Blanchard, Richard
    University of Borås, School of Business and IT.
    Banerjee, Subhashish
    University of Borås, School of Business and IT.
    Baird, Jim
    University of Borås, School of Business and IT.
    Johnson, Ted
    University of Borås, School of Business and IT.
    Bharathan, Desikan
    University of Borås, School of Business and IT.
    Lever, Harold
    University of Borås, School of Business and IT.
    Yu, Jason C. S.
    University of Borås, School of Business and IT.
    Chen, W.
    University of Borås, School of Business and IT.
    OTEC matters 20152015Report (Other academic)
    Abstract [en]

    For mankind as a whole, and in many respects, the world is becoming a better place each year. In both rich and poor countries the standard of living has improved steadily for a very long time. This progress has a serious drawback, the negative effects on Earth’s climate. It is clear that the only way we can live sustainably is by consuming much less. However, this is not enough: there is an undeniable need for new energy sources. As the world’s population grows, many countries will also face more severe shortages of food and of fresh, disease-free water. Most developing countries are situated in tropical regions and are therefore hit hard by increasing tropical storms and similar weather-based disasters, adding to these problems. Ocean Thermal Energy Conversion (OTEC) technology has been proven to be an ideal candidate for addressing and resolving all of these problems for small island developing states (SIDS), and a few months ago, the EU set aside€72 million euros for constructing OTEC plants outside Martinique. Built on a much larger scale, OTEC can, as the only technology known to man, supply the world with its total energy and fresh water needs, increase seafood production many times over, and cooling off parts of the sea surface when they become too hot – all this without any atmospheric emissions. Thus, it is with great excitement that this very first issue of the only journal dedicated to OTEC is being published. The publication covers many facets of OTEC and related matters, such as OTEC technology, sustainability including gender and other social studies, renewable energy, marine biology, metallurgy, and research on developing countries. The publication is aimed at two different audiences, scientists directly or indirectly involved with OTEC technology, and a more diverse group of people consisting of scientists from non-technical fields, industry people, politicians, investors, educators, and more. This volume is published as part of the publication series of the University of Borås, a progressive Swedish university with a high interest in and knowledge about sustainability.

  • 309.
    Dessne, Petter
    et al.
    University of Borås, School of Business and IT.
    Golmen, Lars
    Johnson, Ted
    Bharathan, Desikan
    Lever, Harold
    Ny havsteknik kan lösa miljöproblem2014In: Svenska Dagbladet, ISSN 1101-2412, no 2014-02-08Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Debattartikel som förespråkar miljötekniken OTEC för att förse stora delar av världen med energi och färskvatten.

  • 310. Ding, Feng
    et al.
    Larsson, Peter
    Larsson, Andreas J.
    Ahuja, Rajeev
    Duan, Haiming
    Rosén, Arne
    Bolton, Kim
    University of Borås, School of Engineering.
    The importance of strong carbon-metal adhesion for catalytic nucleation of single-walled carbon nanotubes2008In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 8, no 2, p. 463-468Article in journal (Refereed)
    Abstract [en]

    Density functional theory is used to show that the adhesion between single-walled carbon nanotubes (SWNTs) and the catalyst particles from which they grow needs to be strong to support nanotube growth. It is found that Fe, Co, and Ni, commonly used to catalyze SWNT growth, have larger adhesion strengths to SWNTs than Cu, Pd, and Au and are therefore likely to be more efficient for supporting growth. The calculations also show that to maintain an open end of the SWNT it is necessary that the SWNT adhesion strength to the metal particle is comparable to the cap formation energy of the SWNT end. This implies that the difference between continued and discontinued SWNT growth to a large extent depends on the carbon-metal binding strength, which we demonstrate by molecular dynamics (MD) simulations. The results highlight that first principles computations are vital for the understanding of the binding strength's role in the SWNT growth mechanism and are needed to get accurate force field parameters for MD.

  • 311. Ding, Xiangyu
    et al.
    Liu, Hewen
    Shi, Wenfang
    Skrifvars, Mikael
    University of Borås, School of Engineering.
    Form-fill-seal methodology for controlled encapsulation of small silver particles in hyperbranched polygycidol2009In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 112, no 3, p. 1209-1214Article in journal (Refereed)
  • 312.
    Ding, Yiwen
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Liu, Chang
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Exploring drawbacks in music recommender systems: the Spotify case2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Currently, more and more people use music streaming websites to listen to music, and a music recommendation service is commonly provided on the music streaming websites. A good music recommender system improves people’s user experience of music streaming websites. Nevertheless, there are some issues regarding the existing music recommender systems that need to be looked into.The purpose of this thesis is to identify the weaknesses of music recommender systems. Spotify, a Swedish music streaming website, has a large number of users. As it is a widely known streaming service, it seems appropriate for a case study on the drawbacks of music recommender systems.The case study method has been chosen for doing this research. The process of making up this thesis was divided into three stages. At the first stage, some basic preparations for the thesis were done. The second stage was characterized by some empirical work, like interviews and questionnaires, to collect the required data. Those empirical findings were analyzed in the third part to help us to identify and define the drawbacks.The research results presented in this thesis contribute to close several knowledge gaps in the area of music recommender systems and could thus be beneficial to different actors: streaming website operators to identify drawbacks of their recommender system; designers of recommender systems to improve system design; and, last but not least, this thesis provides some useful advice to those who market music streaming websites.This thesis does not focus on the technical and algorithm fields, i.e. the hardware- and software-related background. Instead, the idea and the functions of the recommender system, its feedback loop and the user experience were subject to our research and discussion. The results of the thesis can provide those responsible with both and inspiration for creating more customized recommender systems.

  • 313. Drotz, Marcus
    et al.
    Kyrkander, Tina
    Lundberg, Stefan
    Svensson, Jan-Erik
    University of Borås, School of Education and Behavioural Science.
    Främmande arter invaderar våra sötvatten2014Report (Other academic)
    Abstract [sv]

    På senare år har allt fler främmande, invasiva arter börjat breda ut sig i våra sötvatten. En främmande art är en organism som har spridits utanför sitt naturliga utbredningsområde med människans hjälp. Detta kan ha skett avsiktligt eller av misstag. En del av dessa nya arter ställer till problem, andra gör det inte. Här beskrivs övervakningen av några invasiva arter samt hur man kan arbeta för att begränsa dem. Ullhandskrabba, vandrarmussla och sjögull kommer av allt att döma att öka sin utbredning i Sverige de närmaste åren. Det finns idag ett stort antal främmande arter rapporterade från svenska sötvatten och i vår närhet finns ett femtiotal nya arter som kan tänkas etablera sig här. Alla dessa arter kommer inte nödvändigtvis att skapa problem men kunskap om deras biologi och observationer från allmänheten kommer att betyda mycket även i det framtida övervakningsarbetet.

  • 314. Duan, Haiming
    et al.
    Rosén, Arne
    Harutyunyan, Avetik
    Curtarolo, Stefano
    Bolton, Kim
    University of Borås, School of Engineering.
    Computational studies of small carbon and iron-carbon systems relevant to carbon nanotube growth2008In: Journal of Nanoscience and Nanotechnology, ISSN 1533-4880, E-ISSN 1533-4899, Vol. 8, no 11, p. 6170-6177Article in journal (Refereed)
    Abstract [en]

    Density functional theory (DFT) calculations show that dimers and longer carbon strings are more stable than individual atoms on Fe(111) surfaces. It is therefore necessary to consider the formation of these species on the metal surfaces and their effect on the mechanism of single-walled nanotube (SWNT) growth. The good agreement between the trends (energies and structures) obtained using DFT and those based on the Brenner and AIREBO models indicate that these analytic models provide adequate descriptions of the supported carbon systems needed for valid molecular dynamics simulations of SWNT growth. In contrast, the AIREBO model provides a better description of the relative energies for isolated carbon species, and this model is preferred over the Brenner potential when simulating SWNT growth in the absence of metal particles. However, the PM3 semiempirical model appears to provide an even better description for these systems and, given sufficient computer resources, direct dynamics methods based on this model may be preferred.

  • 315.
    Dumitrescu, Delia
    University of Borås, Swedish School of Textiles.
    Knitted Light: Space and Emotion2008In: The Nordic Textile Journal 2008, Special Edition Smart Textiles, p. 158-169Article in journal (Other academic)
  • 316.
    Dumitrescu, Delia
    et al.
    University of Borås, Swedish School of Textiles.
    Landin, Hanna
    University of Borås, Swedish School of Textiles.
    Vallgårda, Anna
    University of Borås, Swedish School of Textiles.
    An Interactive Textile Hanging: Textile, Context, and Interaction2012In: Studies in Material Thinking, ISSN 1177-6234, Vol. 7Article in journal (Refereed)
    Abstract [en]

    This article presents three scenarios in which we explore different possibilities for interactive textile hangings, textile hangings that are knitted and attached to servomotors. We have identified a series of variables that address the relationship between the expressions of the changeable pattern, created by rotating motors, and the unchangeable textile pattern. We use these variables, combined with contextual dichotomies, to discuss the relationships between the textile expression, the temporal expression, the place and the interactions for these scenarios.

  • 317.
    Dumitrescu, Delia
    et al.
    University of Borås, Swedish School of Textiles.
    Persson, Anna
    University of Borås, Swedish School of Textiles.
    Touching Loops2009Other (Other academic)
    Abstract [en]

    Touching Loops is a collection of three knitted textiles with structure-changing interactive properties. The textiles are able to sense and react to touch by shrinking, breaking or becoming stiff. The textiles are thought of as interactive architectural material. When they are touched, a specific area in the textile becomes hot. A microcontroller that is connected to the textile is programmed to sense and react to touch. The materials in the samples react to heat in different ways by shrinking, becoming stiff or by breaking into pieces. The developing process consisted in programming the patterns for industrial machines in such a way that the conductive silver yarns are of important matter for the material aesthetics besides their function to generate heat. The three knitted pieces react in different ways when current passes trough the conductive yarns. The first piece combines a silver coated copper yarn and Pemotex yarn in a ridge pattern. In the second sample a Jaquard pattern combines shrinking polyester monofilament, a Grilon yarn and a silver coated copper yarn. This piece reacts to heat by breaking and shrinking. The third piece is constructed with partial knitting and ridge patterns and the yarns used are Pemotex, a Grilon yarn and the silver coated copper yarn. When the conductive yarn gets hot, the ridges shrink and harden. The aim of the project is to explore possibilities for expressive interactive tactile knitted materials and structures. The textiles are seen as a possible material to use in the context of architecture.

  • 318.
    Dumitrescu, Delia
    et al.
    University of Borås, Swedish School of Textiles.
    Persson, Anna
    University of Borås, Swedish School of Textiles.
    Vallgårda, Anna
    University of Borås, Swedish School of Textiles.
    Stretch & Squeeze2010Conference paper (Other academic)
    Abstract [en]

    A computer mouse is a generic interaction tool designed for navigating graphical elements on a two dimensional plane. It is developed in a context of technology and formed to serve the ergonomics of the desktop work situation. A textile mouse, on the other hand, engages a different context. The textile alone evokes the traditions of clothes and home décor that will inevitably influence how it is perceived and consequently used.

  • 319. Dural Erem, A.
    et al.
    Skrifvars, Mikael
    University of Borås, School of Engineering.
    Demirpek, U.
    Özcan, G.
    The Antimicrobial Efficiency of Polyamide 6/Silver Nanocomposites2010Conference paper (Other academic)
  • 320. Dural-Erem, Aysin
    et al.
    Erem, Hasan
    Ozcan, Gulay
    Skrifvars, Mikael
    University of Borås, School of Engineering.
    Anatase titanium dioxide loaded polylactide membranous films: preparation, characterization, and antibacterial activity assessment2015In: Journal of the Textile Institute, ISSN 0040-5000, E-ISSN 1754-2340, Vol. 106, no 6Article in journal (Refereed)
    Abstract [en]

    In this study, the preparation method and characteristics of anatase titanium dioxide (TiO2) nanoparticle-loaded polylactide (PLA) films and their antibacterial efficacy against Klebsiella pneumoniae (ATCC 4352) and Staphylococcus aureus (ATCC 6538) bacterium were studied. A series of PLA nanocomposites containing, respectively, 0, 1, and 5% (wt.) titanium dioxide (TiO2) nanoparticles were prepared by melt intercalation method. The effect of TiO2 nanoparticles on the thermal and mechanical characteristics of the films was determined. Thermal analysis showed that the glass transition temperature, crystallization temperature, melting temperature, and decomposition temperatures (Td0.5 and Td0.05) decreased with the filler content. The results obtained from tensile tests showed that TiO2 nanoparticles reduced the mechanical properties and moduli of the PLA films. On the other hand, the water absorption properties of the nanocomposite films increased with the addition of nanoparticles and nanocomposite films exhibited bacteriostatic and limited bactericidal efficacy according to AATCC 147. Consequently, nanocomposite films may be good materials for medical applications due to their membranous properties.

  • 321. Duric, Sumejja
    et al.
    Talal, Hanin
    Harzdorf, Hjördis
    E-voting systems: Swedish citizens perception for a future implementation2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today’s digitalized society sees constant change and development. Revolutionary and otherwise controversial inventions are now considered conventional. Sweden is one of the most technologically developed countries in the world, with the exception of our voting system. The biggest change seen during the decades is the inclusion of voters. The current voting system in Sweden is neither effective nor accurate. There have been talks about an electronic voting system but Sweden has seen no effect of this. Other countries have already implemented electronic voting with successful results. Projects in other countries have also been shut down with the reason being users that are not aware of how the system actually works, even though citizens were positive towards the systems. No investments have been made in making sure that users know how the system works. It is therefore important to include the end-user in the design and development of a system. This inclusion ensures satisfaction from both parties. If an ultimate solution is to occur, both from a developer and user perspective, involvement needs to happen. 

    Through this study, swedish citizens perspective regarding e-voting will be analyzed to enhance an e-voting system in case of a future implementation in Sweden.   

  • 322. Dzananovic, Sandro
    et al.
    Ly, Kicki
    Privacy Policies: A comparison between large and small organizations2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    E-commerce and transaction on the internet is getting more and more common in every individual’s life. More than 40 % of the worldwide Internet users have bought or made transactions through the internet. This means that there is more than 1 billion online buyers and these numbers will continue to grow. Due to the growth of E-commerce, organizations are searching and creating new technologies for obtaining and processing data regarding consumer’s privacy information. This tends to become a concern for the consumer about how the organizations treat and user the personal information about a specific individual, the purpose for this study is to examine and compare how big and small organizations works with privacy policies and personal information. The target group for this study is organizations that collects and obtain personal information.

    This is a comparative study with a Qualitative approach. Theory and collected data from the organizations have been compared, the interview method conducted was Semi- structured interviews. One small and one big organization have been interviewed and the collected data from the two organizations has then been compared against each other to find differences and similarities about how a small and a big organization work with privacy. The selection of the respondents for the interviews have been selected through different criteria’s where one the organizations works with E-commerce.

    The conclusion of this study is that there are no concrete differences regarding privacy policies between the two organizations that participated in this study although some small differences were found regarding the development of the privacy policies.

  • 323.
    Dzeko, Elvir
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Carlsson, Markus
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Autonoma drönare: modifiering av belöningsfunktionen i airsim2018Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Drones are growing popular and so is the research within the field of autonomous drones. There are several research problems around autonomous vehicles overall, but one interesting problem covered by this study is the autonomous manoeuvring of drones. One interesting path for autonomous drones is through deep reinforcement learning, which is a combination of deep neural networks and reinforcement learning. Problems that researchers often encounter within the field stretch from time consuming training, effective manoeuvring to problems with unpredictability and security. Even high costs of testing can be an issue. With the help of simulation programs, we are able to test algorithms without any concerns to cost or other real-world factors that could limit our work. Microsoft’s own simulator AirSim lets users control the vehicle in their simulator through an application programming interface, which enables the possibility to test a variety of algorithms. The research question addressed in this study is how can the pre-existing reward function be improved on avoiding obstacles and move the drone from start to goal. The goal of this study is to find improvements on AirSim’s pre-existing Deep Q-Network algorithm’s reward function and test it in two different simulated environments. By conducting several experiments and storing evaluation metrics produced by the agents, it was possible to observe a result. The observed evaluation metrics included the average reward that the agent received over time, number of collisions and overall performance in the respective environment. We were not successfully able to gather enough data to measure an improvement of the evaluation metrics for the modified reward function. The modified function that was created performed well but did not display any substantially improved performance. To be able to successfully compare if one reward function is better than the other more research needs to be done. With the difficulties of gathering data, the conclusion is that we created a reward function that we can’t tell if it is better or worse than the benchmark reward function.

  • 324.
    Eide, Linn
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Paredes Degollar, Daniel
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Digital Transformation - Rollen för Big Data, Internet of Things och CloudComputing2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Changes in the business world and on the market means that companies today are constantlyfaced with new challenges. We are in a digitized society that is constantly changing. It issomething that companies must adhere to. The companies face the challenge of digitizing itsoperations to respond to a changing market and increasingly digitized customers. Extension ofnetworks and infrastructure has enabled customers to work in a more connected world thanbefore. For businesses to be included in the game among the competitive organizations, itleads to one of the reasons that companies will use the IT trends in digitization as Big Data,Internet of Things and Cloud Computing. The business model is a main aspect to be takeninto account and adjust for digitization. The study thus aims to examine the role of these threeIT trends in the business and how the business model actually is affected. The study's findingsshow that the use of the three IT trends are low today, and in terms of the business model hasbeen a low impact on even if consciousness is how it should be affected. The IT trends are,however, constantly on the agenda and will play a big role in the future in the activities whilethe business model will have a larger impact.

  • 325. Eklund, Johan
    On the theory and practice of sets in IR2007In: Proceedings of the 1st International Conference on the Theory of Information Retrieval (ICTIR 2007), 2007Conference paper (Refereed)
  • 326.
    Ekström, Björn
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Developing a rule-based method for identifying researchers on Twitter: The case of vaccine discussions2019In: 17th International Conference on Scientometrics and Informetrics, ISSI 2019 - Proceedings Volume 2, 2019, Rom, 2019, p. 2618-2619Conference paper (Refereed)
    Abstract [en]

    This study seeks to develop a method for identifying the occurrences and proportions of researchers, media and other professionals active in Twitter discussions. As a case example, an anonymised dataset from Twitter vaccine discussions is used. The study proposes a method of using keywords as strings within lists to identify classes from user biographies. This provides a way to apply multiple classification principles to a set of Twitter biographies using semantic rules through the Python programming language.

  • 327.
    Ekström, Karin M.
    University of Borås, School of Business and IT.
    Kreativa lösningar stärker handel, tjänster och IT2011In: Borås Tidning, ISSN 1103-9132, no 2011-03-28Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Handel, tjänster och IT representerar idag en allt större del av samhällsekonomin i Sverige, både mätt i andel av BNP och antalet sysselsatta.

  • 328.
    Ekström, Karin M
    et al.
    University of Borås, School of Business and IT.
    Salomonson, Nicklas
    University of Borås, School of Business and IT.
    Looking into the kaleidoscope: different views on reuse and recycling of clothes2012Conference paper (Other academic)
    Abstract [en]

    A major environmental problem in Sweden is the fact that clothes are disposed of in the garbage rather than being reused or recycled. A study (Carlsson et al. 2011) indicates that 8 kg textiles are disposed of in the garbage per individual and year. Another study (Gustafsson and Ekström 2012) shows that 62 percent of the Swedes dispose usable clothes in the garbage. From an environmental perspective, it would be more beneficial to reuse or recycle textiles. In addition, producing textiles requires natural resources. For example, in order to produce 1 kg cotton, it takes between 7.000-29.000 litre water and between 0,3 to 1 kg oil (Fletcher 2008). Factors contributing to the high amount of clothes disposed of are an emphasis on fast fashion, low prices, increased welfare as well as more consumers following the fashion. However, this pattern of consumption is not sustainable in the long run (Ekström et al. 2012). The purpose of this paper is to increase the understanding of how clothing consumption can be more sustainable by demonstrating how a network consisting of different clothing retailers, recycling companies, charity organizations, consumer organizations, environmental organizations, branch organizations and authorities discuss and deal with this problem. The paper focuses on how they work with reuse and recycling today, but also on what they consider as important, for themselves as well as others, to do in the future in order to increase the level of reuse and recycling of clothes. The empirical data is based on a survey as well as the results from six one- day meetings in the network over 1,5 years time. The results show that there are individual as well as collaborative ways to deal with the problem. The participants in the network agree upon several things. First of all, they recognise the need that all the actors in the network have to contribute and collaborate to solve the problem. Second, there has to be long term solutions that are both environmentally as well as financially sound. Third, a consumer perspective that centres on solutions that enables consumers to act more environmentally friendly is a prerequisite in order to reduce disposal of clothes in the garbage and instead increase reuse and recycling. Finally, the role of marketing is pervasive for succeeding to solve this problem both by making the consumers aware of the effects clothes disposal have on the environment, but also by communicating to the consumer that there are alternative ways to dispose of clothes such as reuse and recycling. In order to approach the problem of how consumption can be more sustainable, a kaleidoscopic outlook presenting different views and solutions is suggested.

  • 329.
    Eliasson, Frida
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Karlsson, Gabriella
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Svanling, Agnes
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Smarta enheter i hemmet: nytta eller risk för individen?2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The development of technology and digitization are moving fast forward and have nowextended to the private homes. The smart home is part of a larger phenomenon called Internetof Things (IoT). The IoT devices consist of sensors and computers that can communicate witheach other and create a situational behavior. The idea of smart homes is about using differentsmart devices within the home, which are connected to a shared network. Smart homesprovides with many great functions where the individuals can create a comfortable, safe andsustainable everyday life. In addition to facilitating everyday life for individuals, these smartdevices come with a number of risks. The more devices connected to the Internet, the easier itgets for an unauthorized person to access another person's private information. The smartdevices collect a lot of data, which enables for detailed mapping of the user. It's hard to knowwho gets access to the private data about the user, which makes it difficult for the individualto be anonymous and protect himself. The purpose of the study is to develop knowledge aboutthe awareness of the individual about the risks associated with the use of smart devices athome, as there is relatively little research on the subject. An effect of becoming more aware ofthe risks, can lead to more responsibility taken by the individual to protect itself againstpossible IT crimes.

    The starting point of the study has been to collect prior research and literature and to conducta quantitative survey. The literature study forms the basis for the previous research and thetheoretical framework. With help from the literature, survey questions have been formulatedto answer the research question. The survey was conducted through an internet survey aimedto users of smart devices at home. Based on collected material and empirical data, a resultcould be presented and an analysis performed. With the help of four different themes, aconclusion has been drawn about the awareness of the individual about the risks associatedwith the use of smart devices in the home.Keywords:

  • 330.
    Elisson, Filip
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Sjunfors, Joakim
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    IT-systemleverantörers transformation från produkt till tjänst: - En granskning av hinder och fördelar2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Software as a Service is growing fast by 50 % per year, while Software as a Product is dying. New services are established in an effective way to meet more needs with fewer resources and suppliers become involved during the entire product life cycle. Software as a Service is often associated with cloud services, where both storage and software are offered through network. These services can be offered from data centers where the provider operates IT-infrastructure. Service systems are sold primarily through two different revenue models, Pay as you Go-model or rental-model. By selling IT-system as a service, providers can expand their customer base to customers who do not have the financial power needed to purchase an IT-system software license. A lot suggests that a transformation from product to service is needed for IT-system suppliers, as demand in this segment is increasing. Swedish trade and industry consists of 99 % of small and medium-sized enterprises, but there is no previous research on the problems that may arise during the transformation and what a small or medium-sized IT-system vendor can achieve with a service system. The interest lies in investigating small and medium-sized IT-systems vendors' experiences of the transformation, including its barriers and benefits. The study conducted a theoretical study to get an understanding of Software as a Service and Software as a Product, this understanding has been the basis for the empirical study. Since previous research on small and medium-sized IT-systems suppliers are missing the study has been based on empirical data to find out what the main barriers and benefits that should be considered. Collection of empirical material was done through interviews and theoretical material through literature studies. The study subsequently responded to the main barriers and benefits a small or medium sized IT-system supplier should take into consideration before the transformation from product system to service system.The thesis is written in Swedish.

  • 331.
    Elled, Anna-Lena
    University of Borås, School of Engineering.
    Co-combustion of biomass and waste fuels in a fluidised bed boiler: fuel synergism2008Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The objective of this work was to study co-combustion of biomass and waste fuels in a circulating fluidised bed boiler and to detect synergy effects with respect to flue gas composition and ash formation during boiler operation. It was also the aim to perform supplementary thermodynamic equilibrium calculations in order to support the experimental results. The base fuel used was either wood or bark pellets and the additional fuels included municipal sewage sludge, sludge from the pulp and paper industry and demolition wood. In some of the tests, additives were supplied to the boiler to enhance any effects from substances of special interest. Examples of such additives are zinc oxide, PVC, ammonium sulphate, kaolin and zeolites. The 12 MWth circulating fluidised bed boiler situated at Chalmers University of Technology was central to the investigation. All combustion tests were performed in this boiler and it provided operating data, flue gas composition and samples of fuel, ash and deposits under required combustion conditions. Great effort was put into the analyses of ashes and deposits and in excess of conventional techniques, time-of-flight secondary ion mass spectrometer (TOF-SIMS), scanning electron microscopy energy dispersive x-ray (SEM EDX) and x-ray diffraction (XRD) were applied to several of the samples to create a more complete scan of the constituents. The thermodynamic equilibrium calculations were performed using the computer program FactSage and the module EQUILIB. The thermodynamic data was collected from the database FACT. The focus of the investigation was directed towards three main areas: sulphur capture performance by lime addition to the bed, distribution of heavy metals in ashes and flue gas, and formation of deposits on heat transfer surfaces in the convective pass and the use of municipal sewage sludge as a preventive additive. The relatively high content of phosphorus in municipal sewage sludge interferes with the sulphur capture by lime and decreases the sulphur capture performance. Phosphorus reacts with calcium, which otherwise is available for reaction with sulphur, and forms compounds such as calcium phosphates. The formation was supported by equilibrium calculations and proved by analysing the ashes with TOF-SIMS. The decreased lime efficiency must be taken into account when sulphur capture strategies are decided for the reduction of SO2 emissions from co-combustion of municipal sewage sludge. Further, the use of bark pellets as base fuel during co-combustion with sulphur containing wastes reduces the sulphur emissions due to their relatively high content of calcium and potassium in connection with its low content of sulphur. The supply of heavy metals to the combustion increases dramatically when wood is replaced by municipal sewage sludge under otherwise constant conditions. The heavy metals are to a large extent recovered in the ash and captured by the flue gas cleaning system. Even the most volatile species, such as mercury, are captured and enriched in the fine fly ash. The effective metal capture is partly due to the sludge ash and partly to the bag filter. The amount of ash in the boiler increases with the sludge and the fine fly ash fraction constitutes a high particle surface area which enhances the capture of volatile metals. Further, the ash contains large amounts of several elements known to retain trace elements such as aluminium, calcium, carbon and silicon. Especially the presence of zeolites in the sludge is likely to contribute to the capture of mercury. Further, the enrichment ratios of metals in the filter ash indicate the necessity of including bag-filters in the flue gas cleaning system in order to achieve sufficient removal of toxic heavy metals. Zinc, and its effect on deposit formation, was given special attention since the metal is commonly present in demolition wood. The result showed that combustion of demolition wood contaminated with zinc alone generates only a modest amount of deposits. Demolition wood contaminated with both zinc and chlorine gives rise to more severe deposit formation. The main reason for this is the formation of alkali chlorides but also zinc chlorides in the flue gas. The formation of zinc chlorides is, under reducing conditions, thermodynamically favoured between 450 and 850°C. Under oxidising conditions, the formation is initiated at 400°C and gradually increased with the temperature. Municipal sewage sludge is not only a waste that must be disposed of, it can also be regarded as an additive to prevent deposit formation during combustion of high alkali biomass. The sludge reduces the concentration of KCl in the flue gas, impedes the deposit formation and eliminates the content of chlorine in the deposits. The occurrence is clear of though the fuel is contaminated with chlorine. The effect is partly due to sulphation of potassium and partly to potassium sequestration by the sludge ash.

  • 332. Ells, Marie
    et al.
    Martinovski, Bilyana
    Is computer-mediated communication helpful for ICC?2009In: Proceedings of 16th NIC Conference on Intercultural Communication, Borås, Sweden, 2009Conference paper (Refereed)
  • 333.
    Engström, Frida
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Söderberg, Sofie
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Kravhantering med fokus på användarinverkan2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In every project within systems development, managing requirements in a proper way has a major impact on a project’s success. A total of 56 percent of sources of errors in information systems is a result of shortcomings in requirements engineering (RE). Although there are many methods for managing requirements, these methods are not used to a large extent, and furthermore research results within requirements engineering points to several reasons why they are not used. A reason is that system developers tend to focus on technical features and constraints, which is seen as a reason for the failure of traditional RE-methods. It is also widely known that the foundation of successful system development lies in understanding the social and organizational aspects. In order to provide a useful system, it is therefore important to involve users in the development process. However, there are statistics that shows that a large proportion of users are not involved within the process of requirements engineering.

    The study aims to explore and describe requirements engineering in practise with particular focus on user impact. The methodology for the study has been qualitative and data collection has been performed with semi structured interviews with respondents from three companies. The respondents consisted of four practitioners who work with requirements engineering in system development projects and the remaining three respondents are users of these systems. The empirical analysis presents the result of the study and is compared to the theory to highlight interesting or important links between how practitioners apply requirements engineering in practice and how users are involved in this process.

    The empirical analysis shows that practitioners more likely tend to be inspired by requirements engineering methods than to embrace them entirely. The analysis also shows that requirements engineering standards are inadequate in practice. Additionally, results of the study indicate that super users have greater potential to influence the requirements than other users and that the communication of requirements between system developers and users can be improved. It is clear that there are a lot of potential when it comes to involve users in order to avoid misinterpretation or missing requirements.

  • 334. Engström, Jonas
    et al.
    Hagström, Bengt
    Centrifugal spinning of nanofiber webs: A parameter study of a novel spinning process2009In: Nordic Textile Journal, ISSN 1404-2487Article in journal (Other academic)
  • 335. Engström, Jonas
    et al.
    Thorvaldsson, Anna
    Hagström, Bengt
    Walkenström, Pernilla
    University of Borås, Swedish School of Textiles.
    Nanofibers: small fibers with big potential2009In: Nordic Textile Journal, ISSN 1404-2487Article in journal (Other academic)
  • 336.
    Engström, Tommy
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Bissmarck, Tom
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Gamification som motivationsfaktor inom utbildning2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Gamification, på svenska även känt som spelifiering är användning utav speldesignelement inom andra kontexter än spel. Gamifierade lösningar syftar till att ta de roliga aspekterna ifrån spel som till exempel lek, utmaning och underhållning och applicera detta inom andra kontexter, exempelvis utbildning. Gamification ses av många som en växande trend och spås en massiv tillväxt inom de närmaste åren.

    Vi visar i denna studie hur gamification används som ett incitament till att uppnå ökad motivation och ökat engagemang inom utbildning. Som teoretisk grund för vår studie har en litteraturgransking genomförts i två huvudsakliga syften. Inledningsvis i syfte att skapa en djupare förståelse för fenomenet gamification och reda ut vad som utgör en gamifierad lösning samt för vem en sådan lösning riktar sig till.

    Den andra delen av vår litteraturgranskning syftar till att skapa förståelse för varför och hur gamification kan fungera som en motivationsfaktor för människor. För att besvara dessa frågor studerades olika teorier om mänsklig psykologi i syfte att förstå bakomliggande faktorer till motivation och engagemang inom spelvärlden. Vidare har vi i studien även granskat fall av praktiska tillämpningar av gamification för att se hur gamification används som en motivationsfaktor inom utbildning.

    Resultatet av vår studie visar att gamifierade lösningar används inom utbildningssammanhang med varierat resultat. Ofta uppnås effekter som ökad motivation och ökat engagemang, men det finns även fall där gamification har bidragit till minskad motivation. Det är även oklart huruvida gamification faktiskt bidrar till förbättrad inlärning eller förbättrade studieresultat, även i de fall där man uppnått ökad motivation.

  • 337. Erdtman, Edvin
    et al.
    Ahlström, Peter
    University of Borås, School of Engineering.
    Berlin, Mikael
    Andersson, Thorbjörn
    Gkourmpis, Thomas
    Bolton, Kim
    University of Borås, School of Engineering.
    Penetration and absorption of small molecules in polymers2014Conference paper (Refereed)
  • 338.
    Erdtman, Edvin
    et al.
    Linköping Universitet.
    Bohlén, Martin
    University of Borås, Faculty of Textiles, Engineering and Business.
    Ahlström, Peter
    University of Borås, Faculty of Textiles, Engineering and Business.
    Gkourmpis, Thomas
    Borealis AB.
    Berlin, Mikael
    Tetra Pak Packaging Solutions AB.
    Andersson, Thorbjörn
    Tetra Pak Packaging Solutions AB.
    Bolton, Kim
    University of Borås, Faculty of Textiles, Engineering and Business.
    A molecular-level computational study of the diffusion and solubility of water and oxygen in carbonaceous polyethylene nanocomposites2016In: Journal of Polymer Science Part B: Polymer Physics, ISSN 0887-6266, E-ISSN 1099-0488, Vol. 54, p. 589-602Article in journal (Refereed)
    Abstract [en]

    Monte Carlo and molecular dynamics simulations were performed to investigate the effect on the solubility, diffusion, and permeability of water and oxygen when adding graphene or single-walled carbon nanotubes (SWCNTs) to polyethylene (PE). When compared with pure PE, addition of graphene lowered the solubility of water, whereas at lower temperatures, the oxygen solubility increased because of the oxygen–graphene interaction. Addition of SWCNTs lowered the solubility of both water and oxygen when compared with pure PE. A detailed analysis showed that an ordered structure of PE is induced near the additive surface, which leads to a decrease in the diffusion coefficient of both penetrants in this region. The addition of graphene does not change the permeation coefficient of oxygen (in the direction parallel to the filler) and, in fact, may even increase this coefficient when compared with pure PE. In contrast, the water permeability is decreased when graphene is added to PE. The addition of SWCNTs decreases the permeability of both penetrants. Graphene can consequently be added to selectively increase the solubility and permeation of oxygen over water, at least at lower temperatures. 

  • 339. Erdtman, Edvin
    et al.
    Bohlén, Martin
    University of Borås, School of Engineering.
    Ahlström, Peter
    University of Borås, School of Engineering.
    Gkourmpis, Thomas
    Berlin, Mikael
    Andersson, Thorbjörn
    Bolton Kim, Kim
    University of Borås, School of Engineering.
    Permeation of water and oxygen through carbonaceous PE composites2014Conference paper (Refereed)
  • 340.
    Erdtman, Edvin
    et al.
    University of Borås, School of Engineering.
    Chelakara Satyanarayana, Kavitha
    Bolton, Kim
    University of Borås, School of Engineering.
    Simulation of α- and β-PVDF melting mechanisms2012In: Polymer, ISSN 0032-3861, E-ISSN 1873-2291, Vol. 53, no 14, p. 2919-2926Article in journal (Refereed)
    Abstract [en]

    Molecular dynamics (MD) simulations have been used to study the melting of α- and β-poly (vinylidene fluoride) (α- and β-PVDF). It is seen that melting at the ends of the polymer chains precedes melting of the bulk crystal structure. Melting of α-PVDF initially occurs via transitions between the two gauche dihedral angles (G ↔ G′) followed by transitions between trans and gauche dihedral angles (T ↔ G/G′). Melting of β-PVDF initially occurs via T → G/G′ transitions and via transitions of complete β- (TTTT) to α- (TGTG') quartets. The melting point of β-PVDF is higher than that of α-PVDF, and the simulated melting points of both phases depend on the length of the polymer chains used in the simulations. Since melting starts at the chain ends, it is important to include these in the simulations, and simulations of infinitely long chains yield melting points far larger than the experimental values (at least for periodic cells of the size used in this work), especially for β-PVDF. The simulated heats of fusion are in agreement with available experimental data.

  • 341.
    Erdtman, Edvin
    et al.
    University of Borås, School of Engineering.
    Gebäck, Tobias
    University of Borås, School of Engineering.
    Ahlström, Peter
    University of Borås, School of Engineering.
    Atomistic Modelling of Protein Superabsorbents2012Conference paper (Other academic)
  • 342.
    Erdtman, Edvin
    et al.
    University of Borås, School of Engineering.
    Gebäck, Tobias
    Ahlström, Peter
    University of Borås, School of Engineering.
    Computational modeling of Protein based super-absorbents from waste2011Conference paper (Other academic)
    Abstract [en]

    Hydrogels are used for various applications, for example as transporters in drug delivery, in control lenses, and as superabsorbent material in diapers.[1] Most synthetic produced hydrogels are based on synthetic polymers. Even though they are efficient and cheap, they are not biodegradable and sometimes even toxic. To produce more environmental friendly and biodegradable superabsorbent polymers (Bio- SAPs), other building blocks can be used, such as polysaccharides[2] and various protein structures, for example fish shells[3], collagen[4], soy protein[5] and egg protein[6]. Experimental studies at the University of Boras show that it is possible to produce Bio-SAPs from by-products of ethanol production from ligno-cellulose.[2, 6, 7] 2. Method We have studied the absorption properties of protein structures in silico as a comparison to experimental studies. The NPT Gibbs Ensemble Monte Carlo (GEMC) simulation scheme with two phases is used in order to calculate the absorption capacity of the protein. Pure water was simulated in the first GEMC-phase and the peptide in the second phase. The simulations were made with SPC/E water model [8] and the AMBER99 atomistic force field for the peptides [9]. Furthermore, mesoscopic studies with coarse grained force fields have been done. To facilitate faster computations, we used cell lists for the atom-atom interactions, configurational bias algorithm to build the water molecules and the peptide side-chains, and the cavity bias algorithm [10] for molecule insertions. Model peptides have been studied with varying secondary structure, temperature and protonation (pH). We also plan to study how cross-links affect the absorption. One of the peptides we study is a 20 amino acid long peptide called SSP1.[11] This peptide is designed to form a fibrous structure a hydrogel, and its structure is well defined. We have also studied a peptide which changes secondary structure when changing the pH, and concentration.[12] This makes it possible to compare absorption properties with respect to the secondary structure. 3. Conclusion We have simulated peptides with the Gibbs Ensemble Monte Carlo scheme in order to study the water absorption rate dependent of structure, charge, pH and temperature. This information is useful when developing new biodegradable superabsorbent materials.

  • 343. Erem, Aysin
    et al.
    Ozcan, Gulay
    Skrifvars, Mikael
    University of Borås, School of Engineering.
    Cakmak, Mukerrem
    In vitro assesment of antimicrobial activity and characteristics of polyamide 6/silver nanocomposite fibers2013In: Fibers And Polymers, ISSN 1229-9197, E-ISSN 1875-0052, Vol. 14, no 9, p. 1415-1421Article in journal (Refereed)
    Abstract [en]

    In this study, the preparation method and characteristics of silver (Ag) nanoparticle (NP) loaded polyamide 6 (PA6) nanocomposite and its antimicrobial activity against Klebsiella pneumonia and Staphylococcus aureus were investigated. The melt intercalation method was used to prepare a series of PA 6 nanocomposite fibers containing, 0; 1; 3; 5 % (wt.) Ag. PA6/Ag nanocomposite fibers exhibit increased antimicrobial efficiency with the increase of nanoparticle contents. On the other hand, thermal characterization tests show that the increased concentration of Ag nanoparticles reduces the mechanical properties due to their partial agglomeration leading to flaw generation. The crystallinity of the fibers was found to decrease about 10 % with increase of Ag to 5 %. This was attributed to faster cooling rate experienced in the presence of high thermal conductivity Ag particles.

  • 344.
    Eriksson, Markus
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Andersson, Sebastian
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Komplikationer vid praktiskt arbete med ITIL- En fallstudie om ITIL Practitioner2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The digital society we live today poses increasingly high demand on services and service innovations as a result of the shift from a traditional goods-dominant logic to a service dominant view on goods and products where the customer plays a significate role. The service dominated view also known as IT Service Management, has grown to be an important piece of puzzle for organizations in managing its IT strategies. In order to control organizations’ IT Service Management, different frameworks have been developed partly to promote flexibility. One of the most common framework is the Information Technology Infrastructure Library (ITIL). ITIL focuses on processes for delivering and managing IT services for an organization. The benefits that ITIL can promote affects, among other things, improved service quality by increasing service reliability and service availability. ITIL also promotes flexibility as well as providing clear delimitations and guidance. For ITIL there are different certification levels and programs that can be performed. However, despite ITIL’s widespread popularity and the amount of publications that ITIL is built on, there are a number of difficulties in implementing ITIL. Some organizations experience an uncertainty as to where the work is to begin, which processes that should be implemented first in combination with a demand for practical guidance from practitioners. To answer this demand Axelos, ITIL’s owner, introduced a new level of certification namely ITIL Practitioner. The purpose of this study is therefore to provide an understanding of how ITIL Practitioner can provide practical guidance to a municipal organization. To answer the study’s research question, a qualitative case study was carried out, in which a semi-structured interview as well as document review was conducted on a municipal organization with informants who had good knowledge of ITIL and had undergone the new certification level that Axelos introduced. From the collected material through the interview and documentary review, the authors could identify a number of factors that answer how ITIL Practitioner can provide practical knowledge for a municipal organization. The most prominent factor is achieved by practicing internally with participants from their own organization, where ITIL Practitioner is designed according to the companies own needs. Additional factors that the authors could identify were that ITIL Practitioner can provide organizations with meaningful discussions on soft issues, and that ITIL Practitioner can give a common reason to stand on, so that different subprojects are conducted in a similar manner.

  • 345.
    Eriksson, Owen
    University of Borås, School of Business and IT.
    Communication Quality: Towards an Intersubjective Understanding of Quality2000Report (Other academic)
    Abstract [en]

    The aim of the paper is to discuss the concept of communication quality in the context of the business process. The basic idea behind the concept of communication quality is that high quality communication id equal to a meaningful use of language. This implies that the concept off communication quality will be grounded in the philosophy of language and foremost in speech-act theory and is focused on the intersubjective and social aspects of quality in the business process.

  • 346.
    Eriksson, Owen
    et al.
    University of Borås, School of Business and IT.
    Lind, Mikael
    University of Borås, School of Business and IT.
    Goldkuhl, Göran
    Commitment Management in the Context of Parallel Business Transactions2007In: Systems, Signs & Actions, ISSN 1652-8719, E-ISSN 1652-8719, Vol. 3, no 1, p. 25-57Article in journal (Refereed)
    Abstract [en]

    In order to maintain market position, one of the critical issues facing companies is how they can improve their commitment management. In this paper, the concept of commitment management is used to understand how suppliers and customers create mutual commitments in business agreements, and how these commitments are fulfilled. In a number of empirical case studies, commitment management problems have been the direct consequence of deficiencies in the infrastructural support. One example of such lacking infrastructural support are IT systems intended to support this commitment management process. This is of particular interest in a context of commitments created in parallel business transactions that compete for the same delivery capacity. The aim of the paper is to describe, analyse and propose solutions to some of these problems. This paper proposes a necessary extension to a framework for business interaction between suppliers and customers. This extension is based on business action theory, workpractice theory and ideas from yield management.

  • 347. Erlandsson, Pontus
    et al.
    Arvidsson, Johan
    Coping with risks: applying socio-technical factors when implementing automation in 3PL companies2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    E-commerce are constantly growing, and the logistics sector is moving towards the fourth stage of the industrialization, Industry 4.0, where implementations of automation and use of modern technology is crucial for companies to stay competitive. 3PL is also growing and continues to implement different automated solutions, but despite the general awareness of impact from automation, there is few researches done from a socio-technical perspective.

    By using a qualitative approach and semi-structured interviews together with scientific articles and books, this study aims to investigate the impact of automation by acknowledging the socio- technical factors and analyze how corporations can determine what risks the implementation might carry.

    The empirical analysis describes that the major factor for 3PL corporations to implement automation is to reduce costs and increase output. It also explains that customers value the 3PL’s ability to provide continuous improvements. This is much in line with what is already described in previous literature. Non-3PL companies are similar in many aspects to 3PL companies, but what sets them apart is that 3PL companies is dependent on smooth communication and relationships with partners. Logistics in 3PL companies also need to havea higher degree of flexibility as well as stay within a certain standardization.

  • 348.
    Eson Bodin, Ulla
    et al.
    University of Borås, Swedish School of Textiles.
    Sandvik, Folke
    University of Borås, Swedish School of Textiles.
    Cullus: from idea to patent2008In: The Nordic Textile Journal 2008, Special Edition Smart Textiles, p. 30-51Article in journal (Other academic)
  • 349.
    Evermyr, Sanna
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Wassberg, Emelie
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Äldres användande av Swish: användbarhet och behov2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The payment service Swish was launched in Sweden 2012 when the demand to pay with the mobile came up and now the application got six million users. On the other hand, the percentage of users over the age of 65 is low compared to the younger ages. At the same time, cash management and the use of cash across the board will decrease. Sweden may be free of cash already in 2023. Which can lead to different demographic groups come outsides of the digitalization, including the elderly? Older people have built trust in the use of cash and habits for a long time, so it can be difficult to adopt new electronic solutions.

    Due to its low usage of older people, this study focuses on the shortcomings that make them not use Swish with the gap between technology use and age. The study has chosen to include respondents over 65 years old because it is after that the percentage drops in the use of Swish. In order to achieve the purpose of the study, qualitative method has been chosen in which different interviews were conducted in autumn 2017 and winter 2018. Six respondents have been interviewed, after which a thematic analysis has been conducted.

    In the discussion it appears that none of the respondents use Swish frequently, instead it looks like an emergency solution. All respondents finds Swish simple to use and have the idea that Swish feels safe when the banks in Sweden are behind the creation, and that BankID credentials are required. The link between high education and access to technology was discussed. Finally, it was discussed how respondents has come into contact with Swish.

    The result of the study does not find any difficulties with the utility of the elderly, but instead that the security is valued highly. The perceived security for Swish is big thanks to each of the bank in Sweden and the legitimation with BankID. However, respondents do no experience any advantages over other payment options and the use is not large. In order to make the application more attractive to older people, Swish should therefore focus on creating a need that other payment methods cannot meet.

  • 350. Fatarella, Enrico
    et al.
    Mylläri, Ville
    Ruzzante, Marco
    Pogni, Rathish
    Baratto, Maria
    Skrifvars, Mikael
    University of Borås, School of Engineering.
    Syrjälä, Seppo
    Järvelä, Pentti
    Sulfonated polyetheretherketone/polypropylene polymer blends for the production of photoactive materials2014In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 132, no 8Article in journal (Refereed)
    Abstract [en]

    Sulfonated polyetheretherketone (SPEEK) was synthesized via a mono-substitution reaction of PEEK in concentrated sulphuric acid and was blended with polypropylene (PP) in 2–10%w/w concentration to be used for the production of photoactive thermoplastic products. SPEEK and SPEEK/PP blends were characterized using FTIR, DSC, TGA, NMR, rheology, SEM, and EPR. Under UV-Vis irradiation, stable benzophenone ketyl (BPK) radicals were generated by hydrogen extraction from PP. By increasing the amount of SPEEK in the polymer blend a linear increase in the BPK radicals was achieved according to the EPR data. DSC and TGA tests indicated weaknesses in the thermal stability of SPEEK but according to the rheological tests this should not have a major effect on processabililty. The optimal amount of SPEEK in the blend was obtained at 5%w/w. This concentration provided a good compromise between radical concentration, material processability, and cost

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