In current Android architecture, users have to decide whether an app is safe to use or not. Expert users can make savvy decisions to avoid unnecessary private data breach. However, the majority of regular users are not technically capable or do not care to consider privacy implications to make safe decisions. To assist the technically incapable crowd, we propose a permission control framework based on crowdsourcing. At its core, our framework runs new apps under probation mode without granting their permission requests up-front. It provides recommendations on whether to accept or not the permission requests based on decisions from peer expert users. To seek expert users, we propose an expertise rating algorithm using a transitional Bayesian inference model. The recommendation is based on aggregated expert responses and their confidence level. As a complete framework design of the system, this thesis also includes a solution for Android app risks estimation based on behaviour analysis. To eliminate the negative impact from dishonest app owners, we also proposed a bot user detection to make it harder to utilize false recommendations through bot users to impact the overall recommendations. This work also covers a multi-view permission notification design to customize the app safety notification interface based on users' need and an app recommendation method to suggest safe and usable alternative apps to users.

This thesis presents studies and results for three questions regarding young women and their usage of smartphones related to their self-presentation and personal sphere in public spaces. Six young females signed up to participate after they were asked to be without their smartphone for approximately two hours in public spaces. The reason why we thought this would be beneficial was since this would give the participants the chance to reflect on their normal usage whilst in public. The participants were later, in the interview, questioned about their overall experience and were asked questions considering the different themes of the study. The results of the study show that the functions most used in a smartphone are communication and music. Results for self-presentation show that smartphones play a major part in young females lives and they use their smartphone in order to present themselves in a certain way. It was acknowledged that some individuals find it important to present themselves as not being lonely, and to achieve this they use their smartphone in order to seem like they are interacting with someone even in situations when they are not. Lastly results of the third theme show that young females use their smartphones in different ways in order to protect their personal sphere, by for example listening to music, holding their phone visible or by calling someone.

In the last decade, mobile device ownership has largely increased. In particular, smartphone ownership is constantly rising (A. Smith, 2015; Statista, 2016a), and there is a real hype for luxury brand smartphones (Griffin, 2015). These observations raise the question of which functions smartphones serve in addition to their original purposes of making and receiving calls, searching for information, and organizing. Beyond these obvious functions, studies suggest that smartphones express fashion, lifestyle, and one’s economic status (e.g., Bødker et al., 2009; Statista, 2016b; Vanden Abeele, Antheunis, & Schouten, 2014). Specifically, individuals seem to purchase and use conspicuous luxury brand smartphones to display and enhance status (D. Kim et al., 2014; Müller-Lietzkow et al., 2014; Suki, 2013). But how does owning a conspicuous, high-status smartphone contribute to status, and which benefits may these status boosts provide to their owners? From an evolutionary perspective, status carries a lot of advantages, particularly for males; high status grants them priority access to resources and correlates with their mating success (van Vugt & Tybur, 2016). In this sense, research suggests that men conspicuously display their cell phones to attract mates and to distinguish themselves from rivals (Lycett & Dunbar, 2000). In a similar vein, evolutionarily informed studies on conspicuous consumption indicate that the purchase and display of conspicuous luxuries (including mobile phones and smartphones) relate to a man’s interest in uncommitted sexual relationships and enhance his desirability as a short-term mate (Hennighausen & Schwab, 2014; Saad, 2013; Sundie et al., 2011). Drawing on these findings, this doctoral dissertation investigated how a man is perceived given that he is an owner of a high-status (vs. nonconspicuous, low-status) smartphone as a romantic partner and male rival. This was done in three experiments. In addition, it was examined how male conspicuous consumption of smartphones interacted with further traits that signal a man’s mate quality, namely facial attractiveness (Studies 1 and 2) and social dominance (Study 3). Study 1 revealed that men and women perceived a male owner of a conspicuous smartphone as a less desirable long-term mate and as more inclined toward short-term mating. Study 2 replicated these results and showed that men and women assigned traits that are associated with short-term mating (e.g., low loyalty, interest in flirts, availability of tangible resources) to a male owner of a conspicuous smartphone and perceived him as a stronger male rival and mate poacher, and less as a friend. The results of Study 2 further suggested that specifically more attractive men might benefit from owning a conspicuous smartphone in a short-term mating context and might be hence considered as stronger male rivals. Study 3 partially replicated the findings of Studies 1 and 2 pertaining to the effects of owning a conspicuous smartphone. Study 3 did not show different effects of conspicuous consumption of smartphones on perceptions of a man dependent on the level of his social dominance. To conclude, the findings of this doctoral dissertation suggest that owning a conspicuous, high-status smartphone might not only serve proximate functions (e.g., making and receiving calls, organization) but also ultimate functions, which relate to mating and reproduction. The results indicate that owning a conspicuous smartphone might yield benefits for men in a short-term rather than in a long-term mating context. Furthermore, more attractive men appear to benefit more from owning a conspicuous smartphone than less attractive men. These findings provide further insights into the motivations that underlie men’s purchases and displays of conspicuous, high-status smartphones from luxury brands that reach beyond the proximate causes frequently described in media and consumer psychological research. By applying an evolutionary perspective, this doctoral dissertation demonstrates the power and utility of this research paradigm for media psychological research and shows how combining a proximate and ultimate perspective adds to a more profound understanding of smartphone phenomena. / In den letzten 10 Jahren ist die Zahl der Personen, die ein Mobilgerät besitzen, stark angestiegen. Insbesondere nimmt die Anzahl der Smartphone-Besitzer stetig zu (A. Smith, 2015; Statista, 2016a). Es ist nahezu ein regelrechter „Smartphone-Hype“ zu beobachten, der sich vor allem um bestimmte Geräte von Luxus-Marken dreht (Griffin, 2015). Diese Beobachtungen lassen die Frage aufkommen, welche Funktionen Smartphones haben, die über ihre eigentlichen Funktionen, wie z.B. Anrufe empfangen und tätigen, Informationssuche und Organisation hinausgehen. Studien zeigen, dass Smartphones zusätzlich zu diesen naheliegenden Funktionen auch Ausdruck von Mode, Lifestyle und Status sein können (z.B. Bødker et al., 2009; Statista, 2016b; Vanden Abeele et al., 2014). Dies scheint besonders auf auffällige Smartphones von Luxus-Marken zu zutreffen: Personen kaufen und nutzen diese Geräte, um ihren sozialen Status zu zeigen und zu steigern (D. Kim et al., 2014; Müller-Lietzkow et al., 2014; Suki, 2013). Wie jedoch kann der Besitz eines auffälligen, statusträchtigen Smartphones den eigenen Status erhöhen und welche Vorteile bringt dies mit sich? Aus einer evolutionären Perspektive hat Status viele Vorteile, vor allem für Männer. Ein hoher Status gewährt exklusiven Zugang zu Ressourcen und korreliert mit männlichem Paarungserfolg (van Vugt & Tybur, 2016). So zeigen Studien, dass Männer ihre Mobiltelefone auffallend häufig zeigen, um damit ihren finanziellen und sozialen Status zu demonstrieren, mit dem Ziel potenzielle Partnerinnen auf sich aufmerksam zu machen und sich von Konkurrenten abzuheben (Lycett & Dunbar, 2000). Ähnliches legen auch Studien aus dem Bereich der evolutionären Konsumenten-psychologie nahe: Der Kauf und die Zurschaustellung von auffälligen Luxus-Produkten (inkl. Handys und Smartphones) scheint mit dem Interesse eines Mannes an einer kurzfristigen sexuellen Beziehung in Zusammenhang zu stehen und seinen Partnerwert insbesondere in diesem Kontext zu steigern (Hennighausen & Schwab, 2014; Saad, 2013; Sundie et al., 2011). Aufbauend auf diesen Befunden untersuchte die vorliegende Dissertation in drei experimentellen Studien, wie Männer und Frauen einen Mann, der als Besitzer eines ein auffälligen, statusträchtigen (vs. unauffälligen, wenig mit Status assoziierten) Smartphones präsentiert wurde, als potenziellen Partner und gleichgeschlechtlichen Konkurrenten wahrnahmen. Darüber hinaus wurde untersucht, wie männlicher Geltungskonsum von Smartphones mit zwei weiteren Faktoren, die den Partnerwert eines Mannes signalisieren, interagiert. Dazu wurden zusätzlich die Gesichtsattraktivität (Studie 1 und 2) sowie die soziale Dominanz (Studie 3) des Smartphone-Besitzers manipuliert. Studie 1 zeigte, dass Männer und Frauen den Besitzer eines auffälligen, statusträchtigen Smartphones als einen schlechteren Partner für eine feste Beziehung einschätzten und ihn als interessierter an unverbindlichen sexuellen Beziehungen wahrnahmen im Vergleich zu einem Mann, der als Besitzer eines unauffälligeren, nur wenig mit Status assoziierten Smartphones gezeigt wurde. Studie 2 replizierte diese Befunde und zeigte zudem, dass Männer und Frauen dem Besitzer eines auffälligen Smartphones eher Eigenschaften zuschrieben, die mit einer Kurzzeitpartnerschaft assoziiert sind (z.B. geringe Treue, erhöhte Flirtbereitschaft, schnelle Verfügbarkeit von Ressourcen). Darüber hinaus wurde der Besitzer eines auffälligen Smartphones als ein stärkerer Rivale, als eine größere Bedrohung für eine bestehende Beziehung sowie als ein schlechterer Freund wahrgenommen. Diese Effekte zeigten sich insbesondere dann, wenn der Besitzer des auffälligen Smartphones auch attraktiv war. In Studie 3 konnten die Effekte, die der Besitz eines auffälligen Smartphones auf die Einschätzung eines Mannes als romantischen Partner und gleichgeschlechtlichen Konkurrenten hat, zum Teil repliziert werden. In Studie 3 traten diese Effekte jedoch unabhängig von der sozialen Dominanz des Mannes auf. Insgesamt lassen die Ergebnisse dieser Dissertation vermuten, dass der Besitz eines auffälligen, statusträchtigen Smartphones einer Luxusmarke nicht nur proximate Funktionen (wie z.B. Anrufe empfangen und tätigen, Organisation), sondern auch ultimate Funktionen erfüllen könnte, die sich auf Paarung und Fortpflanzung erstreckt. Die Ergebnisse deuten an, dass Männer vom Besitz eines auffälligen, statusträchtigen Smartphones einer Luxusmarke eher im Kontext einer kurzen, unverbindlichen Beziehung als im Kontext einer festen Partnerschaft profitieren könnten. Darüber hinaus scheinen v.a. attraktivere Männer vom Besitz eines auffälligen Smartphones zu profitieren. Diese Befunde tragen zu einem besseren Verständnis bei, weshalb Männer auffällige, status-trächtige Smartphones von Luxusmarken kaufen und diese zur Schau stellen. Dabei gehen die in dieser Dissertation erlangten Befunde über bisherige Erkenntnisse der Medien- und Konsumentenpsychologie hinaus, welche vorranging proximate Ursachen für den Kauf und die Nutzung von Smartphones diskutiert haben. Durch die Anwendung einer evolutionären Perspektive veranschaulicht die vorliegende Arbeit die Leistung und den Nutzens dieses Forschungsparadigmas für medienpsychologische Forschung und zeigt auf, wie die Synthese einer proximaten und ultimaten Perspektive zu einem umfassenderen Verständnis des Phänomens Smartphone führt.

With advances in microelectronic and wireless communication technologies, smartphones have computer-like capabilities in terms of computing power and communication bandwidth. They allow users to use advanced applications that used to be run on computers only. Web browsing, email fetching, gaming, social networking, and multimedia streaming are examples of wide-spread smartphone applications. Unsurprisingly, network-related applications are dominant in the realm of smartphones. Users love to be connected while they are mobile. Streaming applications, as a part of network-related applications, are getting increasingly popular. Mobile TV, video on demand, and video sharing are some popular streaming services in the mobile world. Thus, the expected operational time of smartphones is rising rapidly. On the other hand, the enormous growth of smartphone applications and services adds up to a significant increase in complexity in the context of computation and communication needs, and thus there is a growing demand for energy in smartphones. Unlike the exponential growth in computing and communication technologies, the growth in battery technologies is not keeping up with the rapidly growing energy demand of these devices. Therefore, the smartphone's utility has been severely constrained by its limited battery lifetime. It is very important to conserve the smartphone's battery power. Even though hardware components are the actual energy consumers, software applications utilize the hardware components through the operating system. Thus, by making smartphone applications energy-efficient, the battery lifetime can be extended. With this view, this work focuses on two main problems: i) developing an energy testing methodology for smartphone applications, and ii) evaluating the energy cost and designing an energy-friendly downloader for smartphone streaming applications. The detailed contributions of this thesis are as follows: (i) it gives a generalized framework for energy performance testing and shows a detailed flowchart that application developers can easily follow to test their applications; (ii) it evaluates the energy cost of some popular streaming applications showing how the download strategy that an application developer adopts may adversely affect the energy savings; (iii) it develops a model of an energy-friendly downloader for streaming applications and studies the effects of the downloader's parameters regarding energy consumption; and finally, (iv) it gives a mathematical model for the proposed downloader and validates it by means of experiments.

This research aims at analysing how the usage of Facebook differs on mobile phones and computers from the view of an end user. 10 people were consulted in semistructured interviews about their individual usage. Topics of the interviews included the amount of time they spend on Facebook on their mobile phones and how often, why they are using it on this device and when they rather use a computer. The results of the interviews indicate that people mostly use their mobile phone on their every-day journeys, esp. while they use public transport and they are bored waiting for or beeing on the means of transport. Often they just check the Newsfeed to see what their friends are doing. They mainly want to be informed about the activities of their friends, therefore, produce less content themselves on Facebook Mobile rather than on their computer. The questioned users do not have the feeling they need to log in on Facebook, instead they do it subconsciously all the time. The small screen and keypad on the mobile phone are still the main reasons why the usage of Facebook on the computer is more convenient. Nevertheless, because Facebook on the mobile phone is limited in its features it also offers a good overview. The non-available features on mobile devices are simply not missed and for this reason not even used on the Facebook computer version. However, if a function should be executed, which does not exist on the mobile phone the users are waiting until they can access a computer but possibly they forget about it by then and the importance of the accomplishment disappears.

Ett av många nya användningsområden för smartphones är att använda dem som caddie på golfbanan. Golfaren kan få hjälp med avståndsuppskattning till intressanta punkter på banan genom att dessa punkter programmeras in och jämförs med smartphonens inbyggda positioneringssystem. Den här rapporten visar hur det med en bildsegmenteringsalgoritm går att slippa det manuella arbetet med att lägga in positioner för sandbunkrar på golfbanan. Algoritmen som tagits fram arbetar på satellitbilder som smartphonen kan ladda ned via dess Internetanslutning. Golfaren kan i ett tänkt scenario ge sig ut på en godtycklig golfbana och få hjälp med avståndsbedömning enbart med hjälp av satellitbilder och smartphonens gps. I snitt hittar den framtagna segmenteringsalgoritmen cirka 70 % av sandbunkrarna på en satellitbild, en siffra som i en verklig applikation skulle behöva ökas och förslag på hur detta kan göras ges i slutet av rapporten. Tre olika upplösningar på satellitbilderna har utvärderats och testkörts i en nyare smartphone. Även om den högsta upplösningen används tar en hel golfbana endast cirka 15 sekunder att segmentera vilket bör hinnas med under loppet av en vanlig golfrunda som i regel tar 3 till 5 timmar. I ett vidare perspektiv går det att tänka sig helt andra tillämpningar där det finns behov av positionsuppskattning av objekt i en satellitbild i sin smartphone. Det bör på ett förhållandevis enkelt sätt gå att utvidga slutsatserna som dragits i rapporten till att gälla annat än enbart sandbunkrar, t.ex. sjöar, fält, åkrar och givetvis andra delar av golfbanan som vattenhinder och greener.

The rise of mobile phones as the number one leading personal communication device make mobile phones very attractive for marketers, as they are always on, always with the consumer and always connected. Smartphones has the ability to update their location (thus the location of the consumer) by themselves. Through this an automatic location-dependent advertisement, triggered by the location of the mobile device, may be sent to any customer in a predetermined area. However, a current problem is how to not misuse this opportunity. For example, even though a consumer is in the nearby area of a store it does not mean that they are interested in receiving an offer. Consumers are also very keen on feeling in control of the access to their personal information. The purpose of this bachelor thesis is thus to investigate what attributes a location-based application may have to increase customer usage by enhancing, facilitating and developing the customers shopping behaviour. Theories used as a basis for investigation are marketing strategy, marketing innovation, direct marketing, mobile marketing (location-based marketing and permission-based marketing), consumer behaviour (customer value, attitudes and monetary- and non-monetary promotion). A deductive, qualitative research approach was chosen, semi-structured interviews and focus groups were conducted among students at the Linnaeus University in Växjö. The interviews regarded application attributes; the results obtained were used as a base for the focus group studies. In the analysis, the findings from the focus groups linked with theory outlined the attributes and how such an application should be designed. The most important categories are customisation and value, followed in descending order by functional, external, registration and privacy. Also concluded is how the customers shopping experience may be enhanced, facilitated and developed on the basis of these attributes. In the conclusion similarities and differences between the two focus groups were discussed and theoretical and managerial implications were outlined.

The smartphone market is growing rapidly, between Google Play and App Store more than 25 billion apps have been downloaded since 2008. Today many companies develop their own smartphone applications (apps) for their customers. We believe that many apps are developed without much consideration about the actual value it brings to the customer, and through them, value for the company. Instead they create applications with hope of keeping the company modern. Developing and implementing apps in a business is neither easy nor free and must therefore add value to the business in some way. By conducting a customer survey, we study customer’s perception and user behaviour of apps from the bank and grocery store business. The survey shows that customers in the grocery store business have very little awareness off these apps. While in the bank business customers have adopted apps in a much higher frequency. With focus on the customer’s perspective this paper discusses the challenges of making "good" apps and the potential of the technology, and thereby suggests ways to develop apps that the customers will recognize and appreciate.

Tack vare bättre och bättre förutsättningar för utveckling av mobila applikationer, samt utbredning av internetbaserade tjänster, presenteras här ett underlag inför val av mobil utvecklingsplattform. De undersökta plattformarna är Android och Iphone på grund av deras växande utbredning på smartphonemarknaden. Studien presenterar förutsättningar för att utveckla webbtjänst-understödda applikationer för intern distribuering. Ett visuellt tilltalande användargränssnitt är också i fokus för den typen av applikation studien riktar sig mot.Vi har kommit fram till att Android är lättare att lära sig om man kommer ifrån en Java- eller .Netmiljö samt lättare att distribuera. Iphone har däremot bättre stöd för att utveckla grafiskt tilltalande applikationer. Båda plattformarna har dock bristfälligt stöd för kommunikation via webbtjänster. Detta resultat uppnåddes genom litteraturstudier, samt en fallstudie där vi utvecklade applikationer med fokus på just webbtjänstkommunikation, intern distribuering samt ett tilltalande användargränssnitt.

With the evolution of communication and hardware technology, mobile phones evolved from the voice communication to the multi-function, the scope of mobile phone applications had completely changed. In this era of rapid technological progress, the shorter product lifecycle and higher replacement rates of smartphone induce competition in the relevant industry become more intense. Various industries introduce new products and applications in efforts to cope with the increasing challenges, but how many features are used by users? In the cause of real connection between mobile phone and users, the control must with a good user interface, but the needs of industries identified do not necessarily conform to user's needs, ignoring the user's thoughts often lead to product failure, master the needs of user is the key to success. Therefore, this study uses the Technology Acceptance Model (TAM) as the theoretical foundation, adds the Innovation Diffusion Theory (IDT) and the induction of the human-machine interface (or User Interface, UI) design principles (diversity, intuition) as external variables, to further explores the attitude of using smartphone . The results: (1) diversity, compatibility, positive influence on perceived usefulness, but intuition don't influence significantly; (2) diversity, intuition, compatibility, positive influence on perceived ease of use; (3) perceived usefulness, perceived ease of use, relative advantage positive influence on the attitude of use; (4) trialability, observability influence on the attitude of use is not significant, and trialability existence negative relationship with the attitude of use.