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  • 1.
    Abbaszadeh, Sepideh
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Espinoza, Daniela
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Instagram: en plattform för att frigöra kvinnors kroppar genom hashtags.: Ett bidrag i diskussionen angående aktivism på Instagram.2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The naked body is an entity that has always been present in both the “real” world and the media. The anatomy of our bodies isn’t something we can avoid; today it reflects the reality that has developed partly from media. According to Instagram’s guidelines users are not allowed to publish naked or semi-naked pictures but that does not stop certain users that are critical to how the body norms and censorship are portrait today. In our study, we take part of research regarding gender in multimedia settings and how they have affected our daily lives. As well as studies, which research the usage of hashtags and how to circumvent censorship. The focus for this study is to research what role Instagram and hashtags have in generating a public discussion as well to draw attention to various issues and causes that are based on norm critique. We have conducted two different observations, held interviews with activists and created an online-survey for users to answer what they think about the Instagram community guidelines. The results show that there is an underlying discrimination acceptance within Instagram and their community guidelines. We can also see that women and users who uses hashtags can spread their causes more effectively, although they are simultaneously at risk for being censored depending on the hashtag they use. According to our respondents from our research there is an agreement regarding the need of updating Instagram’s community guidelines, which could help with eliminate the current discrimination against women and their breasts. At the end of this study we are giving a proposal to how Instagram can work with their censoring in a more critical way. This may contribute to an agenda to make social media platforms safer and less discriminating.

  • 2.
    Abdelaziz, Ahmed
    et al.
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Ang, Tanfong
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Sookhak, Mehdi
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Khan, Suleman
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Liew, Cheesun
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Akhunzada, Adnan
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Survey on network virtualization using openflow: Taxonomy, opportunities, and open issues2016In: KSII Transactions on Internet and Information Systems, ISSN 1976-7277, Vol. 10, no 10, 4902-4932 p.Article in journal (Refereed)
    Abstract [en]

    The popularity of network virtualization has recently regained considerable momentum because of the emergence of OpenFlow technology. It is essentially decouples a data plane from a control plane and promotes hardware programmability. Subsequently, OpenFlow facilitates the implementation of network virtualization. This study aims to provide an overview of different approaches to create a virtual network using OpenFlow technology. The paper also presents the OpenFlow components to compare conventional network architecture with OpenFlow network architecture, particularly in terms of the virtualization. A thematic OpenFlow network virtualization taxonomy is devised to categorize network virtualization approaches. Several testbeds that support OpenFlow network virtualization are discussed with case studies to show the capabilities of OpenFlow virtualization. Moreover, the advantages of popular OpenFlow controllers that are designed to enhance network virtualization is compared and analyzed. Finally, we present key research challenges that mainly focus on security, scalability, reliability, isolation, and monitoring in the OpenFlow virtual environment. Numerous potential directions to tackle the problems related to OpenFlow network virtualization are likewise discussed

  • 3.
    Abdelmassih, Christian
    et al.
    KTH, School of Computer Science and Communication (CSC).
    Hultman, Axel
    KTH, School of Computer Science and Communication (CSC).
    Förutspå golfresultat med hjälp av sentimentanalys på Twitter2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this study we examine the relationship between the sentiment value of golf players’ tweets and their sports results to evaluate the predictive power of the their twitter accounts. Findings on this topic may be of value to bookmakers, gamblers, coaches and fans of sport. Our study is based on two datasets: PGA­tour golf statistics and 112 101 tweets made by 155 profesional golfers over the course of two seasons. The golf players’ sentiment was quantified using the lexical sentiment analysis method AFINN.

    In contrast to other research with similiar methods, our findings suggest that there is low correlation betweet the datasets and that the methods used in our study have low predictive power. Our recommendation is that future studies use additional prediction variables besides sentiment score to better evaluate the predictive power of golf players’ tweets. 

  • 4.
    Abdlbari, Abdulbari
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Användning av mobilapplikationer i smartphones hos unga vuxna: En fallstudie bland studenter och arbetstagare2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Nu förtiden har det blivit allt vanligare att människor använder sig av smartphones. I denna uppsats har jag kartlagt smartphone-användares användningsvanor och mönster hos unga vuxna som antingen studerar eller arbetar. För att få fram den information jag behöver har jag valt att använda mig av dagböcker där sex stycken respondenter deltog under en fyra dagars period och även intervjuer där tre av de sex respondenterna var deltagande efter genomförandet av dagböckerna. Mina resultat visar fascinerande nog att smartphones används till största del på platser där användarna är relativt stillasittande som till exempel i hemmet. Dessutom har det visat sig att studenter har en stor användning av applikationer och där med smartphones, ofta i samband med deras studier, speciellt applikationer kopplade till molntjänster.

  • 5.
    Abdlbari, Abdulbari
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Parkeringsapplikationen: Utveckling av en mobilapplikation för iPhone.2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report describes procedures and preparations made for developing a mobile application.Using a questionnaire and usability tests, I have developed a design document for a parkingapplication for the iPhone 4. The purpose of the application is to help drivers find allowedparking spaces thus making roads safer for everyone while the driver avoids parking tickets.

  • 6.
    Abedin, Md. Zainal
    et al.
    University of Science and Technology Chittagong.
    Chowdhury, Abu Sayeed
    University of Science and Technology Chittagong.
    Hossain, Mohammad Shahadat
    University of Chittagong, Bangladesh.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Karim, Razuan
    University of Science and Technology Chittagong.
    An Interoperable IP based WSN for Smart Irrigation Systems2017Conference paper (Refereed)
    Abstract [en]

    Wireless Sensor Networks (WSN) have been highly developed which can be used in agriculture to enable optimal irrigation scheduling. Since there is an absence of widely used available methods to support effective agriculture practice in different weather conditions, WSN technology can be used to optimise irrigation in the crop fields. This paper presents architecture of an irrigation system by incorporating interoperable IP based WSN, which uses the protocol stacks and standard of the Internet of Things paradigm. The performance of fundamental issues of this network is emulated in Tmote Sky for 6LoWPAN over IEEE 802.15.4 radio link using the Contiki OS and the Cooja simulator. The simulated results of the performance of the WSN architecture presents the Round Trip Time (RTT) as well as the packet loss of different packet size. In addition, the average power consumption and the radio duty cycle of the sensors are studied. This will facilitate the deployment of a scalable and interoperable multi hop WSN, positioning of border router and to manage power consumption of the sensors.

  • 7.
    Abrahamsson, Lisa
    et al.
    Blekinge Institute of Technology.
    Lagerqvist, Amelie
    Blekinge Institute of Technology.
    Att formas och att formge: Normkritisk mönsterformgivning2015Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Our society is made up of norms that say how we should look, behave and live our lives. Many of these norms focuses on how you as a man or woman should behave in relation to your gender. Gender norms are reflected in design and what we design in products, furniture and buildings. With a gender specified norm critical approach, we examine how gender norms are reflected in design and how we as designers can design with norm criticism. With pattern design as an exploratory approach, we want to highlight and examine how gender norms affect and is repeated in what we design, just like a pattern is defined by lines and shapes that are repeated or experienced to be repeated.

    During our investigation it appears that patterns can contribute with discussion and stance that will work in multiple forums. We examine how unisex and male and female can be embodied in patterns, and how norm criticism works as an approach in a design process.

  • 8.
    Abu Nijmeh, Jonas
    et al.
    KTH, School of Computer Science and Communication (CSC).
    Catalan Canales, Diego
    KTH, School of Computer Science and Communication (CSC).
    Prokrastinering i form av medieanvändning: En jämförelsestudie kring kön och sysselsättning2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Procrastination has long been a problem for many. Whether it is school work, training or something else, most individuals have experienced that they deliberately postpone a task for a later occasion. This phenomenon has in recent time been integrated into our society in a negative way. In our media-centered society we are becoming more connected where nowadays almost all of Sweden's population has access to the internet. Technology has brought many opportunities, but it has also opened up for new ways to procrastinate.

    This study aimed to investigate procrastination in the form of media usage by a large target group. We intended to find out eventual differences in procrastination habits between the sexes, but also between workers and students. Previous research has already shown that procrastination differs with age and occupation. With this in mind we seek to answer the question: Which digital media does people use when they procrastinate and on which technical platforms does this happen? In order to answer this question, we conducted a preliminary study on a smaller group of people to get a better understanding of what matters were relevant in this context. This preliminary study then formed the basis for a survey of 91 participants.

    The results showed clear differences between both men and women and between students and workers. Differences regarding both media usage and procrastination habits were seen where some differences were more notable than others. The result confirms previous studies in several aspects and gives us some insight into how different procrastination habits might look.

  • 9.
    Acharya, Soam
    et al.
    Cornell University, Ithaca.
    Smith, Brian P
    Cornell University, Ithaca.
    Parnes, Peter
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Characterizing user access to videos on the World Wide Web1999In: Multimedia computing and networking 2000 / [ed] Klara Nahrstedt, Bellingham, Wash: SPIE - International Society for Optical Engineering, 1999, 130-141 p.Conference paper (Refereed)
    Abstract [en]

    Despite evidence of rising popularity of video on the web (or VOW), little is known about how users access video. However, such a characterization can greatly benefit the design of multimedia systems such as web video proxies and VOW servers. Hence, this paper presents an analysis of trace data obtained from an ongoing VOW experiment in Lulea University of Technology, Sweden. This experiment is unique as video material is distributed over a high bandwidth network allowing users to make access decisions without the network being a major factor. Our analysis revealed a number of interesting discoveries regarding user VOW access. For example, accesses display high temporal locality: several requests for the same video title often occur within a short time span. Accesses also exhibited spatial locality of reference whereby a small number of machines accounted for a large number of overall requests. Another finding was a browsing pattern where users preview the initial portion of a video to find out if they are interested. If they like it, they continue watching, otherwise they halt it. This pattern suggests that caching the first several minutes of video data should prove effective. Lastly, the analysis shows that, contrary to previous studies, ranking of video titles by popularity did not fit a Zipfian distribution.

  • 10.
    Adrup, Joakim
    et al.
    KTH, School of Computer Science and Communication (CSC).
    Skogström, Charlotte
    KTH, School of Computer Science and Communication (CSC).
    Effekterna av spelmekanismerna ledartavlor, serier och certifikat på det dagliga stegantalet hos högskolestuderande studenter2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Gamification is becoming a recognized concept, especially in research areas such as HCI (Human Computer Interaction). This paper discusses and compares three different game mechanics through the daily step count. The game mechanisms included are leaderboards, streaks and badges. The study applies quantitative and qualitative methods to investigate how the above named game mechanisms affect the daily step count of students studying at a university level.

    The study shows that gamification is preferable in terms of awareness and pleasure, but that gamification must not interfere with the basic functions of the original product. On the contrary, gaming mechanisms should be used to support the products existing features, not just to make the product more entertaining and motivating. The general conclusion of the collected quantitative data is that gamification does not influence the daily step count.

    Finally, the article discusses what factors should be implemented to make gamification work in a motivating way. The article also discusses how game developers can use game design to create interesting and engaging applications.

  • 11.
    Agreste, Santa
    et al.
    Department of Mathematics and Computer Science, Physical Sciences and Earth Sciences, University of Messina.
    De Meo, Pasquale
    of Ancient and Modern Civilizations, University of Messina.
    Fiumara, Giacomo
    Department of Mathematics and Computer Science, Physical Sciences and Earth Sciences, University of Messina.
    Piccione, Giuseppe
    Department of Mathematics and Computer Science, Physical Sciences and Earth Sciences, University of Messina.
    Piccolo, Sebastiano
    Department of Management Engineering - Engineering Systems Division at the Technical University of Denmark.
    Rosaci, Domenico
    DIIES Department, University of Reggio Calabria Via Graziella.
    Sarné, Giuseppe M. L.
    DICEAM Department, University of Reggio Calabria Via Graziella.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    An empirical comparison of algorithms to findcommunities in directed graphs and theirapplication in Web Data Analytics2017In: IEEE Transactions on Big Data, E-ISSN 2332-7790, Vol. 3, no 3, 289-306 p.Article in journal (Refereed)
    Abstract [en]

    Detecting communities in graphs is a fundamental tool to understand the structure of Web-based systems and predict their evolution. Many community detection algorithms are designed to process undirected graphs (i.e., graphs with bidirectional edges) but many graphs on the Web - e.g. microblogging Web sites, trust networks or the Web graph itself - are often directed. Few community detection algorithms deal with directed graphs but we lack their experimental comparison. In this paper we evaluated some community detection algorithms across accuracy and scalability. A first group of algorithms (Label Propagation and Infomap) are explicitly designed to manage directed graphs while a second group (e.g., WalkTrap) simply ignores edge directionality; finally, a third group of algorithms (e.g., Eigenvector) maps input graphs onto undirected ones and extracts communities from the symmetrized version of the input graph. We ran our tests on both artificial and real graphs and, on artificial graphs, WalkTrap achieved the highest accuracy, closely followed by other algorithms; Label Propagation has outstanding performance in scalability on both artificial and real graphs. The Infomap algorithm showcased the best trade-off between accuracy and computational performance and, therefore, it has to be considered as a promising tool for Web Data Analytics purposes.

  • 12.
    Ahlenius, Camilla
    et al.
    KTH, School of Computer Science and Communication (CSC).
    Tengvall, Tove
    KTH, School of Computer Science and Communication (CSC).
    Notisers påverkan på mobilanvändning2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The rapid development of portable technology and its integration in our way of living has led to discussions about the negative consequences of technology. Previous research has shown a correlation between major mobile phone usage and a low well-being, and within popular culture new phenomenona regarding technology has arisen, such as digital detox and to downgrade one’s smartphone to a phone with fewer features. Despite this, the trend indicates that smartphone usage is increasing. The smartphone is constantly calling for attention through notifications in form of short texts containing various announcements and information. The purpose of this study is to examine in which way notifications may affect mobile phone usage and if there is a connection between the amount of received notifications and one’s overall mobile phone usage. To investigate this, we implemented structured observations on the users unaffected smartphone usage as well as their usage when notifications were disabled. Surveys were added as a qualitative complement to the observations.

    The result of the study showed that the total amount of unlockings of the screen decreased while the time spent on the smartphone increased, which leads to the conclusion that when the users received fewer notifications the usage sessions became fewer in number but longer in duration. Checking the lock screen, i.e. to wake the smartphone without unlocking it, seemed to have become more frequent. This was due to that the users wanted to ensure they did not miss any important information, and in particular if someone was trying to get in touch with them. An absolute majority experienced the absence of notifications as bothersome, particularly concerning notifications from communication applications. No correlation was found between the users’ attitude to notifications and the way their smartphone usage changed.

  • 13.
    Ahlgren Andersson, Ellen
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Enecker, Maria
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Alice and the Mad Hater: Hur sociala medier påverkar och möjliggör användares motstrategier vid bemötande av kränkande innehåll2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With online communication being increasingly integrated with our everyday lives, internet hate has become a growing problem. This is receiving growing attention in the media and research. In recent years, scientists have begun to shift their focus from the hate itself, to responses to these forms of violation. However, research has been mainly solution orientated and for example focused on legal aspects. Thus, we maintain that the field lacks a media technology based analysis, which this paper intends to contribute to. The aim of this study is to investigate what impact design and functionality in social media has on its users, with relation to user’s counter-strategies on the reception of offensive content. Note that this study is restricted to social media, and not focused on digital media at large. Within the framework of this essay, we have conducted three focus-group interviews and nethnographic studies. The empirical data from our focus groups has determined which social media platforms we examined in the nethnographic study, and subsequently in our analysis. The collected data has been analysed in relation to previous research on social media and internet hate. We have also used theories on resistance, suppression techniques, space of possible actions, norms and the relationship between offline/online and front stage/back stage. The analysis has resulted in five themes that describe the following key findings: 1) social media's positive connotations are problematic in relation to offensive content, but the receivers of internet hate are inventive in working around embedded norms, 2) sometimes no response is the best defence, 3) the culture around the like-function has a significant role in the resistance to internet hate on social media, 4) the shrinking distance between the world online and offline, as well as public and private rooms, affects everyday resistance to violations on social media, and 5) production of positive content and interaction with help of built-in functions are perceived as ways to affect the climate and cooperative resistance. We do not purport to provide technical or design-related proposals for development. However, we believe that our results, among other things, can be used for future development and improvement of social media platforms, and as a basis for further research on resistance to violations on social media.

  • 14.
    Ahlgren Andersson, Ellen
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Enecker, Maria
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Design Thinking och Fyrstegaren: En jämförande studie om två människocentrerade designprocesser2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Design Thinking is a prototype-driven, solution-based and human-centered innovation approach and design process that has been receiving a growing amount of attention in both the industry and research during the last decade. In this paper we intend to evaluate Design Thinking in relation to the in-house design process of the digital transformation agency Mogul AB. Their process, called the Four Step Model, was developed by the design team as a result of years of experience and evaluation of best-practice. The aim of our study is to compare Design Thinking’s initial phases Empathize and Define to the corresponding strategy phase in the Four Step Model. Using this comparison we aim to evaluate in what way Design Thinking could be integrated in the Mogul’s Four Step Model in order to obtain a more human-centered process and result. This study is based on a) research on Design Thinking and human-centered design processes b) interviews with representatives from Mogul's design team, and c) documentation from our own work process, producing a recruitment site for Mogul, where we used Design thinking as our working method. Our study shows that Mogul's design process would benefit from integrating a number of tools and mindsets from Design Thinking. Our key findings suggest that the Four Step Model should be more iterative and include the end user in an extended degree during the whole design process, and especially during the initial stages of the process. The Four Step Model would also benefit from more tangible tools for obtaining a deeper understanding of the end user’s needs. By embracing these mindsets from Design Thinking, the Four Step Model could become more useful, efficient and human-centered.

  • 15.
    Ahlin, Erik
    Dalarna University, School of Humanities and Media Studies, Moving Image Production.
    Redigeringsprogrammens påverkan på bilden: En jämförelse mellan Avid Media Composer och Adobe Premiere Pro2014Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Uppsatsen söker att svara på frågeställningen: Uppstår det skillnad i bildkvaliteten på material som komprimerats med redigeringsprogrammet Avid Media Composer till H.264, i jämförelse med material som har komprimerats till H.264 med Adobe Premiere Pro. Baserat på resultat från tidigare jämförelser och personlig erfarenhet är förförståelsen att det kommer finnas en märkbar skillnad men ingen av programmen kommer att överskugga den andra.Metoden som använts är att en undersökning i form av enkät har fyllts i av mediastudenter baserad på deras upplevelser av sex stycken bildexempel från varje redigeringsprogram utifrån fem faktorer som rör bildkvalitet: Kontrast, skärpa, brus, färg och rörelseåtergivning. Djupgående intervjuer har sedan utförts med fem av informanterna. Resultatet på undersökningen visar överlag små skillnader mellan Avid Media Composer och Adobe Premiere Pro. Informanterna upplevde i majoritet att materialet från Avid hade högre bildkvalitet.

  • 16.
    Ahmad, Iftikhar
    et al.
    Faculty of Computer Science & Information Technology, University of Malaya, Kuala Lumpur.
    Noor, Rafidah Md
    Faculty of Computer Science & Information Technology, University of Malaya, Kuala Lumpur.
    Ali, Ihsan
    Faculty of Computer Science & Information Technology, University of Malaya, Kuala Lumpur.
    Imran, Muhammad
    College of Computer and Information Sciences, King Saud University.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Characterizing the role of vehicular cloud computing in road traffic management2017In: International Journal of Distributed Sensor Networks, ISSN 1550-1329, E-ISSN 1550-1477, Vol. 13, no 5Article in journal (Refereed)
    Abstract [en]

    Vehicular cloud computing is envisioned to deliver services that provide traffic safety and efficiency to vehicles. Vehicular cloud computing has great potential to change the contemporary vehicular communication paradigm. Explicitly, the underutilized resources of vehicles can be shared with other vehicles to manage traffic during congestion. These resources include but are not limited to storage, computing power, and Internet connectivity. This study reviews current traffic management systems to analyze the role and significance of vehicular cloud computing in road traffic management. First, an abstraction of the vehicular cloud infrastructure in an urban scenario is presented to explore the vehicular cloud computing process. A taxonomy of vehicular clouds that defines the cloud formation, integration types, and services is presented. A taxonomy of vehicular cloud services is also provided to explore the object types involved and their positions within the vehicular cloud. A comparison of the current state-of-the-art traffic management systems is performed in terms of parameters, such as vehicular ad hoc network infrastructure, Internet dependency, cloud management, scalability, traffic flow control, and emerging services. Potential future challenges and emerging technologies, such as the Internet of vehicles and its incorporation in traffic congestion control, are also discussed. Vehicular cloud computing is envisioned to have a substantial role in the development of smart traffic management solutions and in emerging Internet of vehicles

  • 17.
    Ahmed, Ejaz
    et al.
    The Centre for Mobile Cloud Computing Research, Faculty of Computer Science and Information Technology, University of Malaya.
    Yaqoob, Ibrar
    The Centre for Mobile Cloud Computing Research, Faculty of Computer Science and Information Technology, University of Malaya.
    Targio Hashem, Ibrahim Abaker
    The Centre for Mobile Cloud Computing Research, Faculty of Computer Science and Information Technology, University of Malaya.
    Khan, Imran
    Schneider Electric Industries, Grenoble.
    Ahmed, Abdelmuttlib Ibrahim Abdalla
    The Centre for Mobile Cloud Computing Research, Faculty of Computer Science and Information Technology, University of Malaya.
    Imran, Muhammad
    College of Computer and Information Sciences, King Saud University.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    The role of big data analytics in Internet of Things2017In: Computer Networks, ISSN 1389-1286, E-ISSN 1872-7069Article in journal (Refereed)
    Abstract [en]

    The explosive growth in the number of devices connected to the Internet of Things (IoT) and the exponential increase in data consumption only reflect how the growth of big data perfectly overlaps with that of IoT. The management of big data in a continuously expanding network gives rise to non-trivial concerns regarding data collection efficiency, data processing, analytics, and security. To address these concerns, researchers have examined the challenges associated with the successful deployment of IoT. Despite the large number of studies on big data, analytics, and IoT, the convergence of these areas creates several opportunities for flourishing big data and analytics for IoT systems. In this paper, we explore the recent advances in big data analytics for IoT systems as well as the key requirements for managing big data and for enabling analytics in an IoT environment. We taxonomized the literature based on important parameters. We identify the opportunities resulting from the convergence of big data, analytics, and IoT as well as discuss the role of big data analytics in IoT applications. Finally, several open challenges are presented as future research directions.

  • 18.
    Ahrsjö, Carl
    KTH, School of Computer Science and Communication (CSC).
    Real-time event based visualization of multivariate abstract datasets: Implementing and evaluating a dashboard visualization prototype2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    As datasets in general grow in size and complexity over time while the human cognitive ability to interpret said datasets essentially stays the same, it becomes important to enable intuitive visualization methods for analysis. Based on previous research in the field of information visualization and visual analytics, a dashboard visualization prototype handling real-time event based traffic was implemented and evaluated. The real-time data is collected by a script and sent to a self-implemented web server that opens up a websocket connection with the dashboard client where the data is then visualized. Said data consisted of transactions and related metadata of an ecommerce retail site applied to a real customer scenario.

    The dashboard was developed using an agile method, continuously involving the thesis supervisor in the design and functionality process. The final design also depended on the results of an interview with a representative from one of the two target groups. The two target groups consisted of 5 novice and 5 expert users to the field of information visualization and visual analytics. The intuitiveness of the dashboard visualization prototype was evaluated by conducting two user studies, one for each target group, where the test subjects were asked to interact with the dashboard visualization, answer some questions and lastly solving a predefined set of tasks. The time spent solving said tasks, the amount of serious misinterpretations and the number of wrong answers was recorded and evaluated.

    The results from the user study showed that the use of colors, icons, level on animation, the choice of visualization method and level of interaction were the most important aspects for carrying out an efficient analytical process according to the test subjects. The test subjects desired to zoom in on each component, to filter the contents of the dashboard and to get additional information about the components on-demand. The most important result produced from developing the dashboard was how to handle the scalability of the application. It is highly important that the websocket connection remain stable when scaling out to handle more concurrent HTTP requests. The research also conclude that the dashboard should handle visualization methods that are intuitive for all users, that the real-time data needs to be put into relation to historical data if one wishes to carry out a valid analytical process and that real-time data can be used to discover trends and patterns in an early-as-possible stage. Lastly, the research provides a set of guidelines for scalability, modularity, intuitiveness and relations between datasets. 

  • 19.
    Ahrsjö, Carl
    et al.
    KTH, School of Computer Science and Communication (CSC).
    Roshult, Tommy
    KTH, School of Computer Science and Communication (CSC).
    Vad påverkar medieteknikstudenternas kursval?2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With many different elective courses to choose between, a lot of students  experience anxiety over deciding which courses to study next semester. The  choice of a specific course can have a big impact on the students future studies  and/or employment. Therefore the anxiety is justified. At the same time the  number of students applying for a course often vary from year to year. This  creates issues for the responsible teachers because of the ever-changing  resource requirements.

    There are several different theories on decision making, addressing the  different time related states as well as the different habitual styles. With  help of theories on these styles and time states, which were investigated with  two surveys and a focus group, and statistical data mining from a database  consisting of former course decision data we have studied how the students  reason when it comes to selecting courses and which aspects that influence their  choice. This gave us a better insight and understanding of the students’ situation and what the varying of applicants to different courses may depend  on.

    The results of this study show that the students at media technology often  have issues choosing between the elective courses. Many students experience that  the available information on the corresponding course homepages is brief and  therefore they call for a clarification of the course information. Because of  this, the majority of the students in the lower grades often rely on the advice  that the students in the higher grades provide. The database analysis shows that  the grades in the mathematics courses have an effect on which track (and its  corresponding elective courses) a student will choose.

  • 20.
    Aikaterini, Micheli
    KTH, School of Computer Science and Communication (CSC).
    Impact of IoT Enabled Service Solutions in the Downstream Automotive Supply Chain2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The automotive industry has been an integral element of global economy for many decades and has withstood economic downturns by being able to shift their processes along with market needs. With the addition of new innovations in the field of ICT, the automotive industry has addressed the need to restructure to stay afront of customers‘ expectation. Internet of Things and Big Data have advanced to where connected solutions are possible to provide value opportunities in many industries including automotives with the entrance of connected vehicles.

    This thesis aims to investigate the extent that connected services could be applied to the downstream automotive supply chain as a viable long-term business solution. A door-to-door perspective was applied in order to identify the challenges and opportunities towards different stakeholders within this supply chain. Qualitative interviews were conducted with leading OEMs, Logistics Providers, NSC, and car dealers as well as quantitative analysis performed on car buying customers to gauge their opinions of connected vehicles and services.

    There are many opportunities for a viable connected service solution to offer additional value to each stakeholder including efficient supply chain management due to increased visibility, improved lead times, and operational effectiveness. However, with the complexity and variations in the supply chain it cannot be applied rapidly and requires all actors to agree to participation in a network that supports the IT infrastructures and fortifies information flow.

  • 21.
    Ajami, Sam
    et al.
    KTH, School of Computer Science and Communication (CSC).
    Maupin, Lucas
    KTH, School of Computer Science and Communication (CSC).
    The effects of video gaming on university grades2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this 21st century IT-world, the use of video gaming has dramatically grown and taken a firm place in many young peoples’ busy day-to-day schedule. As a result, many are growing worried that video gaming will affect people in a negative way, especially when it comes to students’ academic performance.

     

    This thesis is an investigation of the correlation between games and university grades amongst students.

     

    Our results show that students, who played more, had more problems with their grades than the ones who played less. However, the results also show that gaming itself is not the problem, as the correlation between hours spent gaming and grades, is similar to the correlation between hours spent on other hobbies and grades. In essence, two hours of video gaming affects the grades just as much as two hours of physical exercise.

     

    The conclusion from our research is that it is the time spent on other activities than studying, that affects the grades. Video gaming is however amongst the easiest activities to be engaged in for an extended period of time, and can therefore be indirectly harmful to students’ grades.

  • 22.
    Akbar, Mariam
    et al.
    COMSATS Institute of Information Technology, Islamabad.
    Javaid, Nadeem
    COMSATS Institute of Information Technology, Islamabad.
    Kahn, Ayesha Hussain
    COMSATS Institute of Information Technology, Islamabad.
    Imran, Muhammad Al
    College of Computer and Information Sciences, Almuzahmiyah, King Saud University.
    Shoaib, Muhammad
    College of Computer and Information Sciences, Almuzahmiyah, King Saud University.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Efficient Data Gathering in 3D Linear Underwater Wireless Sensor Networks Using Sink Mobility2016In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 16, no 3, 404Article in journal (Refereed)
    Abstract [en]

    Due to the unpleasant and unpredictable underwater environment, designing an energy-efficient routing protocol for underwater wireless sensor networks (UWSNs) demands more accuracy and extra computations. In the proposed scheme, we introduce a mobile sink (MS), i.e., an autonomous underwater vehicle (AUV), and also courier nodes (CNs), to minimize the energy consumption of nodes. MS and CNs stop at specific stops for data gathering; later on, CNs forward the received data to the MS for further transmission. By the mobility of CNs and MS, the overall energy consumption of nodes is minimized. We perform simulations to investigate the performance of the proposed scheme and compare it to preexisting techniques. Simulation results are compared in terms of network lifetime, throughput, path loss, transmission loss and packet drop ratio. The results show that the proposed technique performs better in terms of network lifetime, throughput, path loss and scalability

  • 23.
    Akkaya, Kemal
    et al.
    Southern Illinois University.
    Aust, Stefan
    NEC Communication Systems, Ltd..
    Hollick, Matthias
    TU Darmstadt.
    Itaya, Satoko
    Smart Wireless Laboratory, NICT.
    Kantarci, Burak
    University of Ottawa.
    Pfeiffer, Tom
    TU Berlin.
    Senel, Fatih
    International Antalya University.
    Strayer, Tim
    BBN Technologies.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science. Pervasive and Mobile Computing Laboratory, Department of Computer Science, Electrical and Space Engineering, Luleå University of Technology.
    Message from the demonstrations chair2014Conference paper (Other academic)
    Abstract [en]

    It is my pleasure to welcome you to the sixth Demonstration Session at the IEEE Conference on Local Computer Networks (LCN) 2014. We were looking for demonstrations for all topics covered by the main conference as well as all the workshops held in conjunction with the conference. The technical demonstrations were strongly encouraged to show innovative and original research. The main purpose of the demo session is to provide demonstrations that validate important research issues and/or show innovative prototypes.

  • 24.
    Akram Hassan, Kahin
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Rönnberg, Niklas
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Forsell, Camilla
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Johansson, Jimmy
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Linköping University, Centre for Climate Science and Policy Research, CSPR.
    On the Performance of Stereoscopic Versus Monoscopic 3D Parallel Coordinates2016Conference paper (Refereed)
    Abstract [en]

    This work presents the results from an evaluation of stereoscopic versus monoscopic 3D parallel coordinates. The objective of the evaluation was to investigate if stereopsis increases user performance. The results show that stereoscopy has no effect at all on user performance compared to monoscopy. This result is important when it comes to the potential use of stereopsis within the information visualization community.

  • 25.
    Akrawi, Narin
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Ciechowicz, Michelle
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Företag på Facebook: En studie om företagskommunikation på Facebook2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This paper present a study where the case of the study is to examine how a selection of Swedish companies with a similar number of followers on Facebook can achieve an effective communication through a two-way communication with there followers. A survey to see which technical solutions Swedish companies need to achieve an effective communication. The main purpose is to examine how these companies work to achieve an effective two-way communication with their followers on the selected company's Facebook page.

    Furthermore, the effects that caused by the means of communication and the technical solutions and how they are involved in the process. That constitutes of functions that Facebook provides in terms of share, like, comment and tag. The research is based on a content analysis of six Swedish companies' Facebook pages, that are linked to theories that are related to areas of Facebook, communication, interaction and eWOM. Which late in the paper will be compiled into a conclusion.

    The study resulted in various forms of communication and interaction on account of the selected company's activity, purpose and on the company's adaptation after their business.

  • 26.
    Al Moubayed, Samer
    et al.
    KTH, School of Computer Science and Communication (CSC), Speech, Music and Hearing, TMH.
    Heylen, D.
    Bohus, D.
    Koutsombogera, Maria
    Papageorgiou, H.
    Esposito, A.
    Skantze, Gabriel
    KTH, School of Computer Science and Communication (CSC), Speech, Music and Hearing, TMH.
    UM3I 2014: International workshop on understanding and modeling multiparty, multimodal interactions2014In: ICMI 2014 - Proceedings of the 2014 International Conference on Multimodal Interaction, Association for Computing Machinery (ACM), 2014, 537-538 p.Conference paper (Refereed)
    Abstract [en]

    In this paper, we present a brief summary of the international workshop on Modeling Multiparty, Multimodal Interactions. The UM3I 2014 workshop is held in conjunction with the ICMI 2014 conference. The workshop will highlight recent developments and adopted methodologies in the analysis and modeling of multiparty and multimodal interactions, the design and implementation principles of related human-machine interfaces, as well as the identification of potential limitations and ways of overcoming them.

  • 27.
    Alakärppä, Ismo
    et al.
    University of Lapland, Rovaniemi.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Johansson, Dan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Hosio, Simo
    University of Oulu.
    Ojala, Timo
    University of Oulu.
    NIMO overall architecture and service enablers2014Report (Other academic)
    Abstract [en]

    This article describes the architecture and service enablers developed in the NIMO project. Furthermore, it identifies future challenges and knowledge gaps in upcoming ICT service development for public sector units empowering citizens with enhanced tools for interaction and participation. We foresee crowdsourced applications where citizens contribute with dynamic, timely and geographically spread gathered information.

  • 28.
    Alam, Quratulain
    et al.
    Department of Computer Sciences, Institute of Management Sciences, Peshawar.
    Tabbasum, Saher
    Department of Computer Sciences, COMSATS Institute of Information Technology, Islamabad.
    Malik, Saif U.R.
    Department of Computer Sciences, COMSATS Institute of Information Technology, Islamabad.
    Malik, Masoom
    Department of Computer Sciences, COMSATS Institute of Information Technology, Islamabad.
    Ali, Tamleek
    Department of Computer Sciences, Institute of Management Sciences, Peshawar.
    Akhunzada, Adnan
    Center for Mobile Cloud Computing Research (C4MCCR), University of Malaya, 50603 Kuala Lumpur.
    Khan, Samee U.
    Department of electrical and computer engineering, North Dakota State University, Fargo, ND.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Buyya, Rajkumar
    Cloud Computing and Distributed Systems, (CLOUDS) Laboratory, Department of Computing and Information Systems, The University of Melbourne.
    Formal Verification of the xDAuth Protocol2016In: IEEE Transactions on Information Forensics and Security, ISSN 1556-6013, E-ISSN 1556-6021, Vol. 11, no 9, 1956-1969 p.Article in journal (Refereed)
    Abstract [en]

    Service Oriented Architecture (SOA) offers a flexible paradigm for information flow among collaborating organizations. As information moves out of an organization boundary, various security concerns may arise, such as confidentiality, integrity, and authenticity that needs to be addressed. Moreover, verifying the correctness of the communication protocol is also an important factor. This paper focuses on the formal verification of the xDAuth protocol, which is one of the prominent protocols for identity management in cross domain scenarios. We have modeled the information flow of xDAuth protocol using High Level Petri Nets (HLPN) to understand protocol information flow in a distributed environment. We analyze the rules of information flow using Z language while Z3 SMT solver is used for verification of the model. Our formal analysis and verification results reveal the fact that the protocol fulfills its intended purpose and provides the security for the defined protocol specific properties, e.g. secure secret key authentication, Chinese wall security policy and secrecy specific properties, e.g. confidentiality, integrity, authenticity.

  • 29.
    Albayrak, Sahin
    et al.
    TU Berlin.
    Elkotob, Muslim
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Toker, Ahmet
    TU Berlin.
    Smart middleware for mutual service-network awareness in evolving 3GPP networks: network aware applications & application aware networks2008In: 2008 3rd International Conference on Communication System Software and Middleware and workshops: [COMSWARE 2008]; Bangalore, India, 6 - 10 January 2008, Piscataway, NJ: IEEE Communications Society, 2008, 44-50 p.Conference paper (Refereed)
    Abstract [en]

    We have designed a smart middleware and are working on implementing and deploying it as a landmark architectural piece run by nodes of the Future Internet. The middleware we propose aims as a main goal at making applications and services fully network-aware in the sense that they utilize network resources and tune their own demands based on what the underlying networks can offer. On the other hand, the smart middleware makes networks service aware in the sense that networks also adapt their configuration to service demands. Challenges of the Future Internet such as scalability, increased interoperability, and smart collaboration between engines are addressed by our middleware. Focusing on 3GPP networks including IP Multimedia Subsystem (IMS) networks, this paper presents the architectural design of our middleware and shows in two showcases how and why it is capable of addressing future challenges. Scenarios such as service and network-aware coordinated load balancing and "always-best-connected" as a service verify the merits of our smart middleware design.

  • 30.
    Albertsson, Mimmi
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    TILLGÄNGLIGHET PÅ SVENSKA KOMMUNERS WEBBPLATSER: En kartläggning av kommuners arbete med att göra deras webbplats tillgänglig för personer med funktionsnedsättning.2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Swedish municipalities' websites contain vast amounts of information that caters to a broad audience. For users to be able to access this information, it is important that the website is accessible, to everyone. 74 percent of people with disabilities states in a survey conducted by the Swedish Agency for Participation (2015a) that they use the internet to make contact with local municipalities, but simultaneously more than 1 out of 10 experiences difficulties associated with the use of computers and the Internet, according to Statistics Sweden (2014). The purpose of this study was to identify how Swedish municipalities are working to make their website available for people with disabilities. The study also examined what municipalities should do to make available their website and what difficulties are in the process of making a municipal website available.

     

    In working with this survey people who have insights into the subject and seven community representatives were interviewed. To collect quantitative data a questionnaire survey answered by 208 of Sweden's 290 municipalities was conducted.

     

    The study resulted in a survey of how Swedish municipalities work with web accessibility, a study of what actions the municipalities should take and also problematic factors in the process to become accessible. Today, many municipalities are investing in the development of new websites but there are four main factors that affect their work. These factors are lack of knowledge, lack of resources, organizational characteristics, such as unclear division of responsibility and decentralized organizations, and the lack of distinct requirements. The survey also shows that there are significant differences between the small and big municipalities regarding their accessibility initiative.

  • 31.
    Al-Dulaimi, Anwer
    et al.
    ECE, University of Toronto.
    Anpalagan, Alagan
    WINCORE Lab, Ryerson University, Toronto.
    Bennis, Mehdi
    University of Oulu, Centre for Wireless Communications, University of Oulu.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    5G Green Communications: C-RAN Provisioning of CoMP and Femtocells for Power Management2016In: 2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB): Montreal, Canada, 4-7 October 2015, Piscataway, NJ: IEEE Communications Society, 2016, 7324392Conference paper (Refereed)
    Abstract [en]

    The fifth generation (5G) wireless network is expected to have dense deployments of cells in order to provide efficient Internet and cellular connections. The cloud radio access network (C-RAN) emerges as one of the 5G solutions to steer the network architecture and control resources beyond the legacy radio access technologies. The C-RAN decouples the traffic management operations from the radio access technologies leading to a new combination of virtualized network core and fronthaul architecture. In this paper, we first investigate the power consumption impact due to the aggressive deployments of low-power neighborhood femtocell networks (NFNs) under the umbrella of a coordinated multipoint (CoMP) macrocell. We show that power savings obtained from employing low power NFN start to decline as the density of deployed femtocells exceed certain threshold. The analysis considers two CoMP sites at the cell-edge and intra-cell areas. Second, to restore the power efficiency and network stabilization, a C-RAN model is proposed to restructure the NFN into clusters to ease the energy burden in the evolving 5G systems. Tailoring this to traffic load, selected clusters will be switched off to save power when they operate with low traffic loads

  • 32.
    Aldén, Marit
    KTH, School of Computer Science and Communication (CSC).
    Utvärdering av ett elektroniskt journalsystem för veterinärer: Identifiering av lämpliga lösningar på ett problem beträffande användbarhet2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Objective: According to Swedish law veterinarians must document information about all patient visits. The patient records are useful for gathering data about the health status of treated animals. The purpose of this study was to evaluate and discover usability issues in an existing electronic health record system used by veterinarians.

    Methods: Four different methods were used to help achieve the goals with the study during the time period of 14 weeks. At first, field studies and observations were conducted at two different clinics close to Stockholm. The think aloud method were used to evaluate four tests, representing user flows, in the system to locate usability issues. Five persons participated in the test, three medical secretaries and two person with a technical background. During one and a half week, the heuristic walkthrough was conducted through 90 different tests. At last, a questionnaire consisting of 14 questions was sent out to all veterinarians currently using the electronic health record system.

    Results: The field studies and observations resulted in a storyboard representing a visualized picture of the veterinarians work situation. The think aloud tests resulted in finding problems the participants discovered when conducting the tests. After the heuristic walkthrough 27 bugs and 7 usability issues were found. In total the questionnaire reached approximately 340 veterinarians and 120 resonded, a response ratio of 35 %. The summary of the answers showed that there were issues with too many clicks to complete a task. Users thought it was difficult to get an overview of the system and that it was time consuming to complete their work duties. Solutions for the problems are visualized through paper prototypes.

  • 33.
    Alekzandra, Granath
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Filmskapande för nybörjare - steg för steg2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report is about film making, wich parts that are included in film making and things that is good to think of when doing film for the first time. A short movie has been created and from this, this study has been done to figure out if the theory is like the reality. Also the report is based om the book ”How to get started in film making” by Tom Holden and interviews with people working with film.

  • 34.
    Alexander, Bodén
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Kommunikation och marknadsföring inom Sociala medier – Novamedia Svenska PostkodLotteriet AB2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    When I worked with the daily communication with the lottery’s customers on social media the Communications Department at Nova Media Swedish Postcode Lottery contacted me to write a document, plan and present an advertising campaign in their social media channels to Christmas 2014. The company had ideas on a campaign that they wanted develop where my job was to develop and present a plan for how to implement the campaign. The purpose is to explain what PostkodTomten is and to highlight its commercial advantages for marketing purposes. To have succeeded with this work, I needed a clear methodology and plan. I deepened my knowledge in marketing with a clear focus on social media, literary studies has been key and theoretical studies have been a good basis to implement my work practically. The conclusion I take with me in the future, the importance of how to dispose of your work, meetings booked weekly and milestones were set up giving the project good order and structure. This report will first and foremost focus and process these documents but also contains a theoretical part of marketing and communications in social media in general. The document and the report were presented to the company as an appendix. The theoretical parts of the report focuses on the marketing and communications in social media, how it is going to and how to do it appropriately. It is also up to what a company can do to strategically "stick out" and promote themselves on social media and its various channels. The terms "Buzz marketing" and "viral marketing" will also be explained.

  • 35.
    Alexandersson, Jon
    KTH, School of Computer Science and Communication (CSC).
    Klumpigt eller blockerande? Analys av två fotografer på Instagram2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Instagram is a social medium with a large number of users, including several professional and famous photographers. However, the medium has several limitations, which makes it stand out from other more conventional channels. The goal of this study is to answer the question: How do the photographs that two professional photographers publish on Instagram versus on their websites differ?

     

    This essay focuses on the photographers Ira Block and Mattias Klum and analyses photographs that they have published on Instagram and photographs published on their websites. The analyses are performed from a semiotic point of view and with Gert Z Nordströms methods of image analysis, both on a macro and micro level. A total of 120 photographs have been analysed on a macro level and four photographs on a micro level.

     

    The analyses show that both photographers have made differences in what images they choose to publish on Instagram and on their websites – in many cases images that are easier to comprehend are preferred on Instagram. Nevertheless, the photographers have used different methods to accomplish this, for instance by publishing close-ups or making sure that there aren’t too many individuals present in their photographs.

  • 36.
    Alexandersson, Viktor
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Faber, Adrian
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Kritisk design i en digital videoproduktion: En explorativ studie i praktisk tillämpning av kritisk design2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Critical design is a research- and innovationarea under development. The critical design theory has been used in many design-related areas and intends to get consumers to become more critical when it comes to how their everyday lives are controlled by different beliefs, values, ideologies and behavioral patterns that are incorporated into design (Dunne & Raby, 2001). Since critical design is a theory that seeks to transform in practice the challenge today lies in creating practical examples that show how it can be done, which is a necessity for the theory to develop (Bardzell et al., 2012). This study intends to be method developing by creating a set of tools based on selected parts (theoretical methods and perspectives) from critical design. The goal of these tools are to function as an instrument enabling practical implementation of critical design in a design/production process. In this study we have tested our tools in a specific productionprocess of a music video to explore how to apply critical design practically. In doing so we used design-oriented research methods, in particular Daniel Fällmans triangelmodel for interactiondesign and design research (2008). By bringing together critical design perspectives and video production purposes, this study hopes to make a contribution to the method fulfilling work of bridging the existing gap between theory and practice in critical design. 

  • 37.
    Alhamazani, Khalid
    et al.
    University of New South Wales, Sydney.
    Ranjan, Rajiv
    CSIRO, Canberra.
    Mitra, Karan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Rabhi, Fethi
    University of New South Wales, Sydney.
    Jayaraman, Prem Prakash
    CSIRO, Canberra.
    Khan, Samee Ullah
    North Dakota State University, Fargo.
    Guabtni, Adnene
    NICTA, Sydney.
    Bhatnagar, Vasudha
    University of Delhi.
    An overview of the commercial cloud monitoring tools: research dimensions, design issues, and state-of-the-art2015In: Computing, ISSN 0010-485X, E-ISSN 1436-5057, Vol. 97, no 4, 357-377 p.Article in journal (Refereed)
    Abstract [en]

    Cloud monitoring activity involves dynamically tracking the Quality of Service (QoS) parameters related to virtualized resources (e.g., VM, storage, network, appliances, etc.), the physical resources they share, the applications running on them and data hosted on them. Applications and resources configuration in cloud computing environment is quite challenging considering a large number of heterogeneous cloud resources. Further, considering the fact that at given point of time, there may be need to change cloud resource configuration (number of VMs, types of VMs, number of appliance instances, etc.) for meet application QoS requirements under uncertainties (resource failure, resource overload, workload spike, etc.). Hence, cloud monitoring tools can assist a cloud providers or application developers in: (i) keeping their resources and applications operating at peak efficiency, (ii) detecting variations in resource and application performance, (iii) accounting the service level agreement violations of certain QoS parameters, and (iv) tracking the leave and join operations of cloud resources due to failures and other dynamic configuration changes. In this paper, we identify and discuss the major research dimensions and design issues related to engineering cloud monitoring tools. We further discuss how the aforementioned research dimensions and design issues are handled by current academic research as well as by commercial monitoring tools.

  • 38.
    Alhamazani, Khalid
    et al.
    University of New South Wales.
    Ranjan,, Rajiv
    CSIRO, Australia.
    Rabhi, Fethi
    University of New South Wales.
    Wang, Lizhe
    Mitra, Karan
    Cloud Monitoring for Optimizing the QoS of Hosted Applications2013In: IEEE CloudCom, IEEE Communications Society, 2013Conference paper (Refereed)
  • 39.
    Alhamazani, Khalid
    et al.
    School of Computer Science and Engineering, University of New South Wales.
    Ranjan, Rajiv
    CSIRO Digital Productivity, Acton.
    Jayaraman, Prem
    CSIRO Digital Productivity, Acton.
    Mitra, Karan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Liu, Chang
    Sydney University of Technology.
    Rabhi, Fethi
    School of Computer Science and Engineering, University of New South Wales.
    Georgakopoulos, Dimitrios
    Royal Melbourne Institute of Technology, Melbourne.
    Wang, Lizhe
    Chinese Academy of Sciences, Beijing.
    Cross-Layer Multi-Cloud Real-Time Application QoS Monitoring and Benchmarking As-a-Service Framework2016In: I E E E Transactions on Cloud Computing, ISSN 2168-7161Article in journal (Refereed)
    Abstract [en]

    Cloud computing provides on-demand access to affordable hardware (e.g., multi-core CPUs, GPUs, disks, and networking equipment) and software (e.g., databases, application servers and data processing frameworks) platforms with features such as elasticity, pay-per-use, low upfront investment and low time to market. This has led to the proliferation of business critical applications that leverage various cloud platforms. Such applications hosted on single/multiple cloud provider platforms have diverse characteristics requiring extensive monitoring and benchmarking mechanisms to ensure run-time Quality of Service (QoS) (e.g., latency and throughput). This paper proposes, develops and validates CLAMBS—Cross-Layer Multi Cloud Application Monitoring and Benchmarking as-a-Service for efficient QoS monitoring and benchmarking of cloud applications hosted on multi-clouds environments. The major highlight of CLAMBS is its capability of monitoring and benchmarking individual application components such as databases and web servers, distributed across cloud layers (*-aaS), spread among multiple cloud providers. We validate CLAMBS using prototype implementation and extensive experimentation and show that CLAMBS efficiently monitors and benchmarks application components on multi-cloud platforms including Amazon EC2 and Microsoft Azure.  

  • 40.
    Alhamazani, Khalid
    et al.
    School of Computer Science and Engineering, University of New South Wales.
    Ranjan, Rajiv
    CSIRO Computational Informatics, Canberra.
    Jayaraman, Prem Prakash
    CSIRO Computational Informatics, Canberra.
    Mitra, Karan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Wang, Meisong
    CSIRO Computational Informatics, Canberra.
    Huang, Zhiquiang (George)
    CSIRO Computational Informatics, Canberra.
    Wang, Lizhe
    Chinese Academy of Sciences, Beijing.
    Rabhi, Fethi
    School of Computer Science and Engineering, University of New South Wales.
    Real-time QoS Monitoring for Cloud-based Big Data Analytics Application in Mobile Environments2014In: 2014 15th IEEE International Conference on Mobile Data Management (MDM 2014): Brisbane, Australia 15 -18 July 2014, Piscataway, NY: IEEE Communications Society, 2014, Vol. 1, 337-340 p., 6916940Conference paper (Refereed)
    Abstract [en]

    The service delivery model of cloud computing acts as a key enabler for big data analytics applications enhancing productivity, efficiency and reducing costs. The ever increasing flood of data generated from smart phones and sensors such as RFID readers, traffic cams etc require innovative provisioning and QoS monitoring approaches to continuously support big data analytics. To provide essential information for effective and efficient bid data analytics application QoS monitoring, in this paper we propose and develop CLAMS-Cross-Layer Multi-Cloud Application Monitoring-as-a-Service Framework. The proposed framework: (a) performs multi-cloud monitoring, and (b) addresses the issue of cross-layer monitoring of applications. We implement and demonstrate CLAMS functions on real-world multi-cloud platforms such as Amazon and Azure.

  • 41.
    Alhamazani, Khalid
    et al.
    University of New South Wales, Sydney.
    Ranjan, Rajiv
    CSIRO Computational Informatics, Canberra.
    Mitra, Karan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Jayaraman, Prem Prakash
    CSIRO, Canberra.
    Huang, Zhiqiang
    CSIRO Computational Informatics, Canberra.
    Wang, Lizhe
    Center for Earth Observation & Digital Earth, Chinese Academy of Sciences.
    Rabhi, Fethi
    University of New South Wales, Sydney.
    CLAMS: Cross-Layer Multi-Cloud Application Monitoring-as-a-Service Framework2014In: Proceedings of the 11th IEEE International Conference on Services Computing (IEEE SCC 2014), Piscataway, NJ: IEEE Communications Society, 2014, 283-290 p.Conference paper (Refereed)
    Abstract [en]

    Cloud computing provides on-demand access to affordable hardware (e.g., multi-core CPUs, GPUs, disks, and networking equipment) and software (e.g., databases, application servers, data processing frameworks, etc.) platforms. Application services hosted on single/multiple cloud provider platforms have diverse characteristics that require extensive monitoring mechanisms to aid in controlling run-time quality of service (e.g., access latency and number of requests being served per second, etc.). To provide essential real-time information for effective and efficient cloud application quality of service (QoS) monitoring, in this paper we propose, develop and validate CLAMS—Cross-Layer Multi-Cloud Application Monitoring-as-a-Service Framework. The proposed framework is capable of: (a) performing QoS monitoring of application components (e.g., database, web server, application server, etc.) that may be deployed across multiple cloud platforms (e.g., Amazon and Azure); and (b) giving visibility into the QoS of individual application component, which is something not supported by current monitoring services and techniques. We conduct experiments on real-world multi-cloud platforms such as Amazon and Azure to empirically evaluate our framework and the results validate that CLAMS efficiently monitors applications running across multiple clouds.

  • 42.
    Alhouaidy, Zahra
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Att sprida upphovsrättsligt skyddat material på YouTube: Om användarnas motivation att ladda upp upphovsrättsskyddat material2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Ett av de mest populära community:n på internet och en av världens mest populärastewebbplats i dag är videotjänsten YouTube. Strömmande tjänster blir alltmer efterfrågade i taktmed att tekniken utvecklas och bandbreddens prestationsförmåga inte längre är en begränsning.Inte minst har strömmande tjänster, i synnerhet YouTube, blivit populärt på grund av desskopierade innehåll av användare, i motsats till det egenskapade. Många av de uppladdadevideoklippen är upphovsrättsskyddade och just sådana videoklipp har visat sig tendera att varasärskilt efterfrågade bland användarna.I den här uppsatsen tittar jag på användarnas beteenden på YouTube i form av en observationnär de laddar upp upphovsrättsskyddat material. Jag undersöker hur användare ställer sig tillupphovsrätten och de regler som råder på YouTube genom en enkätundersökning. Slutligenintervjuar jag två advokater specialiserade inom området för att ta del av deras professionellasynsätt. Uppsatsen presenterar de observerade användarstrategierna och reflektionerna.

  • 43.
    Alhouaidy, Zahra
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    En elektronisk portfolio: Designprinciper, metoder och ett förslag av en e-portfolio som komplement till CV2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna rapport redovisar utvecklingen av en elektronisk portfolio som är avsedd att användas av personer verksamma inom eller med inriktning mot IT-branschen, till exempel webbutvecklare. Syftet med e-portfolion är att den skall representera en persons kunskaper och kompetens med hjälp av publicerat material som kan tänkas vara intressant för arbetsgivare. Tanken är att e-portfolion skall fungera som komplement till CV och personligt brev. För utvecklingen av e-portfolion har jag utnyttjat olika designprinciper och riktlinjer. Märkspråket HTML, CSS samt skriptspråken PHP och JavaScript har använts. Målet var att utveckla ett fullt fungerande förslag på en e-portfolio, designad för ett visst ändamål och strukturerad med olika typer av innehåll. Resultatet blev ett komplett förslag på en e-portfolio i form av en webbsida.

  • 44.
    Alissandrakis, Aris
    et al.
    Linnaeus University, Faculty of Technology, Department of Media Technology.
    Milrad, Marcelo
    Linnaeus University, Faculty of Technology, Department of Media Technology.
    Designing interactive mobile services to promote civic participation in northern Uganda2013In: ICT for Anti-Corruption, Democracy And Education In East Africa / [ed] Katja Sarajeva, Stockholm: Stockholm University, 2013, 53-65 p.Chapter in book (Refereed)
    Abstract [en]

    This chapter presents the activities and outcomes of the "People's Voices: Developing Cross Media Services to Promote Citizens Participation in Local Governance Activities" project.

    The aims of the project were a) to identify and describe a number of cross media services that can be used to promote citizens’ participation in political decisions and civic activities, and b) to develop a conceptual design and a prototype system of such a service. The project included a number of field trips from Sweden to Uganda, and used participatory design and ethnographic techniques for requirements elicitation, actively involving the different stakeholders. The developed system allows people in Uganda to use their mobile phones to submit reports of irregularities in local governance or poor services delivery using an interactive voice menu interface.

    We hope that our specific contribution will emphasize on how novel ways of integrating and using ICT can provide opportunities to encourage and facilitate civic engagement in North Uganda. The potential massive adoption of the kind of interactive mobile services described in this book chapter can be used in unique ways to provide opportunities to make governmental services more innovative, transparent and cost-effective, as well as to encourage citizens to become more engaged and goal-focused for the common good of their society.

  • 45.
    Alissandrakis, Aris
    et al.
    Linnaeus University, Faculty of Technology, Department of Media Technology.
    Nake, Isabella
    Linnaeus University, Faculty of Technology, Department of Media Technology.
    A New Approach for Visualizing Quantified Self Data Using Avatars2016In: Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct, New York, NY, USA: ACM Press, 2016, 522-527 p.Conference paper (Refereed)
    Abstract [en]

    In recent years, it is becoming more common for people to use applications or devices that keep track of their life and activities, such as physical fitness, places they visited, the music they listen to, or pictures they took. This generates data that are used by the service providers for a variety of (usually analytics) purposes, but commonly there are limitations on how the users themselves can also explore or interact with these data. Our position paper describes a new approach of visualizing such Quantified Self data, in a meaningful and enjoyable way that can give the users personal insights into their own data. The visualization of the information is proposed as an avatar that maps the different activities the user is engaged with, along with each such activity level, as graphical features. An initial prototype (both in terms of graphical design and software architecture) as well as possible future extensions are discussed.

  • 46.
    Allansson, Rasmus
    Dalarna University, School of Humanities and Media Studies, Sound and Music Production.
    Musikens påverkan på film: En studie i musikens påverkan på tittarens tolkning av en karaktär.2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med den här uppsatsen är att bidra med en djupare förståelse för hur musik påverkar

    uppfattningen av en karaktär i en film. Uppsatsen jämför resultaten från de som studerar inom

    ämnet musikproduktion med de som studerar inom ämnet bildproduktion på Högskolan

    Dalarna. Den undersökning som har bedrivits var av både kvantitativ och kvalitativ karaktär.

    Deltagarna i undersökningen har fått se en filmsekvens i tre olika versioner. Först utan musik,

    sedan med skräckmusik och avslutningsvis med spänningsmusik. Undersökningen är baserad

    på Johnny Wingstedts teorier om hur vi påverkas av musiken i vår vardag. Beroende på vilken

    musik de fick höra i samband med klippen så påverkades deras uppfattning av både

    karaktären samt handlingen i filmen.

  • 47.
    Almqvist Gref, Andreas
    et al.
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Elblaus, Ludvig
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Falkenberg Hansen, Kjetil
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Sonification as Catalyst in Training Manual Wheelchair Operation for Sports and Everyday Life2016In: Proceedings of the Sound and Music Computing Conference, SMC 2016, Sound and Music Computing , 2016, 9-14 p.Conference paper (Refereed)
    Abstract [en]

    In this paper, a study on sonification of manual wheelchair movements is presented. The aim was to contribute to both rehabilitation contexts and in wheelchair sports contexts, by providing meaningful auditory feedback for training of manual wheelchair operation. A mapping approach was used where key parameters of manual wheelchair maneuvering were directly mapped to different sound models. The system was evaluated with a qualitative approach in experiments. The results indicate that there is promise in utilizing sonification for training of manual wheelchair operation but that the approach of direct sonification, as opposed to sonification of the deviation from a predefined goal, was not fully successful. Participants reported that there was a clear connection between their wheelchair operation and the auditory feedback, which indicates the possibility of using the system in some, but not all, wheelchair training contexts.

  • 48.
    Al-Turjman, Fadi M.
    et al.
    Department of Computer Engineering, Middle East Technical University, Northern Cyprus Campus.
    Imran, Muhammad
    College of Computer and Information Sciences, King Saud University.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Value-Based Caching in Information-Centric Wireless Body Area Networks2017In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 17, no 1, 181Article in journal (Refereed)
    Abstract [en]

    We propose a resilient cache replacement approach based on a Value of sensed Information (VoI) policy. To resolve and fetch content when the origin is not available due to isolated in-network nodes (fragmentation) and harsh operational conditions, we exploit a content caching approach. Our approach depends on four functional parameters in sensory Wireless Body Area Networks (WBANs). These four parameters are: age of data based on periodic request, popularity of on-demand requests, communication interference cost, and the duration for which the sensor node is required to operate in active mode to capture the sensed readings. These parameters are considered together to assign a value to the cached data to retain the most valuable information in the cache for prolonged time periods. The higher the value, the longer the duration for which the data will be retained in the cache. This caching strategy provides significant availability for most valuable and difficult to retrieve data in the WBANs. Extensive simulations are performed to compare the proposed scheme against other significant caching schemes in the literature while varying critical aspects in WBANs (e.g., data popularity, cache size, publisher load, connectivity-degree, and severe probabilities of node failures). These simulation results indicate that the proposed VoI-based approach is a valid tool for the retrieval of cached content in disruptive and challenging scenarios, such as the one experienced in WBANs, since it allows the retrieval of content for a long period even while experiencing severe in-network node failures.

  • 49.
    Amadeo, Marcia
    et al.
    Universita Mediterranea di Reggio Calabria.
    Campolo, Claudia
    Universita Mediterranea di Reggio Calabria. Telecommunications.
    Quevedo, Jose
    Universidade de Aveiro, Inst Telecomunicacoes.
    Corujo, Daniel
    Universidade de Aveiro, Inst Telecomunicacoes.
    Molinaro, Antonella
    Universita Mediterranea di Reggio Calabria. Telecommunications.
    Iera, Antonio
    Universita Mediterranea di Reggio Calabria.
    Aguiar, Rui L.
    Universidade de Aveiro, Inst Telecomunicacoes.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Information-Centric Networking for the Internet of Things: Challenges and Opportunities2016In: IEEE Network, ISSN 0890-8044, E-ISSN 1558-156X, Vol. 30, no 2, 92-100 p., 7437030Article in journal (Refereed)
    Abstract [en]

    In view of evolving the Internet infrastructure, ICN is promoting a communication model that is fundamentally different from the traditional IP address-centric model. The ICN approach consists of the retrieval of content by (unique) names, regardless of origin server location (i.e., IP address), application, and distribution channel, thus enabling in-network caching/replication and content-based security. The expected benefits in terms of improved data dissemination efficiency and robustness in challenging communication scenarios indicate the high potential of ICN as an innovative networking paradigm in the IoT domain. IoT is a challenging environment, mainly due to the high number of heterogeneous and potentially constrained networked devices, and unique and heavy traffic patterns. The application of ICN principles in such a context opens new opportunities, while requiring careful design choices. This article critically discusses potential ways toward this goal by surveying the current literature after presenting several possible motivations for the introduction of ICN in the context of IoT. Major challenges and opportunities are also highlighted, serving as guidelines for progress beyond the state of the art in this timely and increasingly relevant topic.

  • 50.
    Amanda, Brunnberg Söderberg
    Dalarna University, School of Humanities and Media Studies, Sound and Music Production.
    När kapitalet färgar radiovågorna: Hur reklamfinansieringen avspeglar sig i programinnehållet i kommersiell radio2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Den kommersiella radion är beroende av reklamfinansiering för sin överlevnad och det enda sättet att locka till sig annonsörer är att kunna visa att man nåt ut till den breda massan och för att nå ut till den breda massan behövs ett intressant redaktionellt innehåll. Det redaktionella innehållet är en produkt av den branschlogik som råder och ingår i det branschformat som genom kloning och franchising sprider sig inom det rådande radioklimatet. Branschformatet för den kommersiella radion avspeglar sig i bland annat rollbesättning, musiken och sändningstempot, vilka i sin tur bildar det redaktionella innehållet. Det som präglar det redaktionella innehållet är dock alltid det allmänna intresset. Branschformatet sägs även sudda ut den gräns som länge funnits och som upprätthållits av branschen där det redaktionella innehållet ska separeras från reklam. Denna gräns blir mer och mer otydlig då man har börjat hitta vägar runt i form av bland annat sponsring av inslag och tävlingar.

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