[comp] Sähkötekniikan korkeakoulu / ELEC
Permanent URI for this collectionhttps://aaltodoc.aalto.fi/handle/123456789/77
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Browsing [comp] Sähkötekniikan korkeakoulu / ELEC by Department "Department of Communications and Networking"
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- Diversity and End User Context in Smartphone Usage Sessions
School of Electrical Engineering | A4 Artikkeli konferenssijulkaisussa(2011) Soikkeli, Tapio; Karikoski, Juuso; Hämmäinen, HeikkiMobile end user context has gained increasingattention in the mobile services industry. Context information isseen as an important component in developing new, morepersonalized, mobile services and applications. This paper studiesthe effect of end user context on smartphone usage sessions.Smartphone usage sessions are used to depict user behavior andusage habits of smartphone users on a high level. We havedetected end user contexts, and extracted smartphone usagesession information from handset-based data of 140 smartphoneusers. We first examine and describe usage sessions as such, andthen in different end user contexts. According to our usagesession analysis, smartphone usage is highly diversified acrossusers. For example, the average number of sessions per dayranges from 3 to 46. Characteristics of smartphone usage sessionsdiffer in different end user contexts. For example, an averagesession is 37 % longer in the Home-context than in the Office-context,but Office has 56 % more sessions per time unit thanHome. The results imply that mobile services and applicationsneed to adapt to user behavior in order to be personalizedenough, and that context awareness is indeed a worthwhile steptowards this. - An End User Context Framework for Handset-based Studies
School of Electrical Engineering | B3 Vertaisarvioimaton artikkeli konferenssijulkaisussa(2012) Soikkeli, Tapio; Karikoski, Juuso; Hämmäinen, HeikkiEnd user context information is seen as one of the most important components in developing more personalized mobile services and applications. The practical impact of context/context-awareness research and new opportunities in the field provided by emerging data collection methods such as handset-based measurements (i.e, collecting smartphone usage data directly from the users’ devices) have induced new highly interesting large scale empirical context studies, but also quite diverse usage of the term context itself. When talking about context it is necessary to unambiguously state how it is understood in the particular work. On one hand the term should be positioned with the existing and commonly understood general definitions, but on the other hand it should also be acknowledged that especially an empirical research paper can grasp only some specific aspects or elements of context. This paper proposes an end user context framework that attempts to clarify the use of the term context in handset-based measurement related studies. The framework is partly based on the experimental experience accumulated in our own handset panel studies. While helping researchers to communicate and position the end user context elements used, the framework helps other stakeholders, such as service providers and application developers, to identify research most relevant for their particular needs. In the paper we provide also a case study demonstrating the usage of the framework and consider some of the privacy issues related to handset-based measurements and user provided contextual data. - Measuring Social Relations: Case OtaSizzle
School of Electrical Engineering | A4 Artikkeli konferenssijulkaisussa(2010) Karikoski, Juuso; Nelimarkka, MattiThere are different levels of engagement in socialrelations between persons. Using a single data set for measuringsocial relations may, however, lead to fallacious results, whileusing multiple data sets the threat of fallacy can be reduced andthe nature of different kind of social relations examined. Thispaper presents the OtaSizzle research platform for combiningmultiple data sets and measuring social relations. To present theusefulness of this, the first empirical results of the social networkanalysis performed with the platform are presented anddiscussed. Handset-based measurements are used together withdata from the OtaSizzle social media services to study the socialrelations within a group of 20 users. As a result the socialnetworks derived with the different data sources are presentedand compared and a number of future research items discussed.According to the measures calculated the social networks derivedfrom the mobile devices are quite similar while the OtaSizzleservice network is considerably different, indicating a differencein the online social network and the communication networkinside the user group. - Mobile social phonebooks - Mobile phone user perceptions and practical implications for mobile operators
School of Electrical Engineering | A4 Artikkeli konferenssijulkaisussa(2012) Karikoski, Juuso; Mäkinen, OlliWe introduce a term called mobile social phonebook, which refers to the integration of traditional mobile phone contacts with contacts from mobile Internet communication services that is happening in the mobile device’s phonebook. First, mobile phone user perceptions towards mobile social phonebooks are studied by means of semi-structured interviews. The results of the interviews are combined with related work and discussed from a mobile operator perspective. We claim that mobile social phonebooks will have an effect on the interrelationships of mobile communication services and discuss implications related to providers, privacy and future of mobile social phonebooks. Moreover, we claim that the future analysis on interrelationships needs to happen on a more detailed level, than what has been achieved so far. This paper contributes to the research fields of mobile platforms and mobile communication services and is valuable both for practitioners and academics. - Scenario Analysis and System Dynamics in New Emerging Technology Research: Case Mobile Peer-to-Peer Content Distribution
School of Electrical Engineering | A4 Artikkeli konferenssijulkaisussa(2009) Karikoski, Juuso; Heikkinen, Mikko; Hämmäinen, HeikkiThis paper studies the use of scenario analysis andsystem dynamics in researching mobile peer-to-peer contentdistribution as a new emerging technology. Scenario analysisbounds the uncertainty related to the alternative futures of thetechnology by defining different scenarios. System dynamics isused to build a quantitative model based on the scenarios.During the research process four learning scenarios and aquantitative model depicting a dynamic mobile peer-to-peerfile sharing ecosystem are constructed. As a result we concludethat the usage of scenario analysis is favorable in researchingmobile peer-to-peer content distribution as a new emergingtechnology while the applicability of system dynamics can bequestioned. - Substitution in smartphone communication services
School of Electrical Engineering | A4 Artikkeli konferenssijulkaisussa(2011) Karikoski, Juuso; Luukkainen, SakariSubstitution between mobile internet communication services and traditional mobile operator-provided communication services is studied in this paper using smartphones. The empirical data are collected with handset-based measurements conducted in Finland between 2008 and 2010. The data are collected from a total of 183 early adopter Symbian smartphone users. The individual-level correlation analysis indicates that no clear evidence in favor of substitution can be found. This implies that the services are used for different purposes as independent services and are not direct substitutes to each other. The results support similar studies conducted by other researchers. However, the analysis can be extended and improved in a number of ways that are discussed as future research. - Surfing for Inspiration: digital inspirational material in design practice
School of Arts, Design and Architecture | A4 Artikkeli konferenssijulkaisussa(2018) Koch, Janin; Laszlo, Magda; Lucero Vera, Andres; Oulasvirta, AnttiOver the last decade, many new opportunities have emerged to support creativity and problem-solving in design by finding inspirational materials via the Internet. Online design communities such as those of Behance and Pinterest showcase portfolios and user-made artwork, and they offer support for designers’ day-to-day work to find and collect inspirational material. However, very little is known about how these communities affect inspiration-related practices of professional designers and how designers view them. This paper presents new data on the practices designers employ when seeking digital inspiration sources online and reflecting on, tracking, and managing them in today’s Web design. Current practice and views on sources of inspiration were described based on responses from 51 professional designers. The results suggest that the Internet has become a prevalent source for ideas in design, yet designers experience mounting issues of trust and relatedness with regard to online sources. Therefore, encouraging both should be considered a guiding principle for tools aimed at supporting designers within the realm of design practice.