Andreas Sackl

Andreas Sackl
AIT Austrian Institute of Technology | ait · Center for Technology Experience

Dr-Ing, Dipl.-Ing., Mag. phil., BSc., Bakk. phil.

About

49
Publications
6,566
Reads
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625
Citations
Education
March 2013 - August 2016
Technische Universität Berlin
Field of study
  • Computer Science
March 2009 - May 2013
University of Vienna
Field of study
  • Mass Media and Communication Science
September 2007 - December 2010
TU Wien
Field of study
  • Media and Computer Science

Publications

Publications (49)
Chapter
In this paper, we demonstrate how to utilize acceptance modeling in UX optimization via an adapted Technology Acceptance Model (TAM), which was applied in an industrial software development context. We evaluated a new Android launcher application that changes the user interface of smartphones to better match the needs of elderly users. Our findings...
Conference Paper
The situatedness of researchers and developers influences the whole research process from ideas to methods to results. To assess the diversity of perspectives in the QoE field, we conducted a quantitative content analysis of QoMEX proceedings authorship examining five years of the locality of authors (2015-2019) and two years of gender and author t...
Conference Paper
Once highly automated vehicles become available, drivers will be freed to perform activities other than driving when automated driving mode is activated. Such activities could include relaxing, reading, exercising, or working. The work of professional drivers such as truck drivers can be expected to be especially affected by this technology and to...
Chapter
In den letzten Jahren wurde die Literatur rund um Bürgerbeteiligung von der Aussage dominiert, die Besorgnis erregend hohe Nichtbeteiligung an öffentlichen Vorgängen und Entscheidungen läge einerseits an den Zugangsbeschränkungen traditioneller Beteiligungsprozesse und anderseits am generellen Nichtinteresse von BürgerInnen an Politik. Um dem entge...
Chapter
Location-based citizen participation systems have so far mostly been characterized by mediated human-to-human communication between citizens, authorities and other stakeholders. However, in the near future we will see more automatized feedback elements, which inform citizens about the expectable financial or legal implications of their requests. We...
Article
Full-text available
Citizen participation for social innovation and co-creating urban regeneration proposals can be greatly facilitated by innovative IT systems. Such systems can use Open Government Data, visualise urban proposals in 3D models and provide automated feedback on the feasibility of the proposals. Using such a system as a communication platform between ci...
Article
Full-text available
This article addresses the overall relevance and the influence of user expectations in the context of perceptual quality evaluation of technical systems, and how information about individual expectations can be integrated into research on Quality of Experience (QoE). Based on a literature survey on expectations in the fields of psychology, service...
Conference Paper
Full-text available
Radio scheduling is a well-studied problem that has challenged researchers throughout the last decades. However, recent findings that stem from the Quality of Experience (QoE) domain come to give a new perspective to traditional radio scheduling approaches. In this paper, we take advantage of recent subjective results regarding the impact of throug...
Article
A quarter of the world population will be using smartphones to access the Internet in the near future. In this context, understanding the quality of experience (QoE) of popular apps in such devices becomes paramount to cellular network operators, who need to offer high-quality levels to reduce the risks of customers churning for quality dissatisfac...
Thesis
In the scientific field of Quality of Experience (QoE) the impact of technical influencing factors — often referred as Quality of Service (Qos) — and additional context factors like applications, usage scenarios, emotional state, etc. on the subjective quality assessment is examined. Nevertheless, two relevant aspects have been neglected so far in...
Article
The systematic investigation of network bandwidth fluctuations and their impact on Quality of Experience (QoE) has recently gained center stage, not only in academia but also among network providers. This development is driven by the fact that in a real world usage scenario, volatile network performance (and thus varying QoE) actually is the norm,...
Conference Paper
The scientific researches performed in the past decade clearly highlighted that Quality of Experience (QoE) has become the ultimate measure of service value in this rapidly developing era of technology. Its continuous monitoring is now simply essential and is the key to service success. Subjectively measured QoE is considered to be somewhat unerrin...
Article
While the network quality research has been oscillating between user- and technology-driven viewpoints, the evolution of a utility-centric perspective is still a good way off. Today, not only insufficient data exists on network quality market figures, but also on the user's usage appreciation across service types and test ranges. Filling those rese...
Article
Although web applications are well known for performance variations during a session, the impact of network quality fluctuations on user-perceived quality has been neglected so far in QoE research. In this paper, we present the results of two subjective lab experiments which investigated the influence of outages, throughput alternations and increas...
Article
Current QoE assessment approaches predominantly treat endusers as passive consumers of the services provided by the system under test. As a consequence, we witness a lack of evaluation methods suitable for real-world economic scenarios in which subjects actually represent active, decisionmaking agents. In this paper we provide guidance on how to co...
Article
Cloud-based systems are gaining enormous popularity due to a number of promised benefits, including ease of deployment and administration, scalability and flexibility, and costs savings. However, as more personal and business applications migrate to the Cloud, the service quality becomes an important differentiator between providers. ISPs, Cloud pr...
Conference Paper
YouTube is the most popular and volume-dominant service in today's Internet, and is changing the way ISPs manage their networks. Understanding the performance of YouTube traffic is paramount for ISPs, specially for mobile operators, who must handle the huge surge of traffic with the constraints and challenges of cellular networks. In this paper we...
Conference Paper
Confronted with soaring IP traffic demands and unsatisfying revenue prospects, charging and tariffing alternatives are about to regain significant attention in the telecommunications industry. While classical revenue optimization and customer perceptions, i.e., Quality of Experience (QoE), has been largely investigated by now, the understanding of...
Conference Paper
Strongly rising interest in Quality of Experience (QoE) research together with the current economical struggle of Network Service Providers (NSPs) are about to lead towards monetization of QoE overtaking outright quality optimization in importance. While there is still a significant lack of quantitative studies for backing QoE-based charging recomm...
Conference Paper
Despite the fact that novel QoE based charging mechanism are vitally needed, the complex interrelation of payment and quality perception has been examined only marginally so far. In this paper we want to describe a comprehensive experiment which investigates the intricate interplay of content selection, quality decisions & evaluation and payment st...
Conference Paper
Full-text available
Within the current paradigm change from Quality-of-Service (QoS) towards Quality-of-Experience (QoE), the question of how to charge for QoE is widely neglected in the research community despite of its obvious importance. In this paper, we present and analyze a fixed point model which specifically reflects the double role of prices, i.e. as regulati...
Conference Paper
Examining monetary aspects related to QoE research, e.g. as bias, requires specifically defined empirical testing and data analysis routines. This paper presents an advanced setup for investigating the impact of purchasing behaviors in an interactive Video-on-demand scenario, and, based on lessons learned from previous and current experiments, prov...
Conference Paper
Full-text available
We are witnessing a dramatic rise of cloud-based media services nowadays, not only in terms of importance to end users but also in terms of traffic volume - a challenge for network and service providers alike. However, while the Quality of Experience of cloud-based video streaming services like YouTube has already become a well studied subject, thi...
Conference Paper
In contrast to traditional QoS-based charging, charges for QoE (Quality of Experience) play a double role both as part of the evaluation context and as counterpart of the user's willingness-to-pay for service quality. To further investigate this link between pricing and QoE, we combine some unexpected results from empirical quality perception exper...
Conference Paper
Full-text available
YouTube and Facebook are two of the most consumed applications in today's Internet. Together they account for more than 30% of the overall Internet's traffic volume and span more than half of the Internet users worldwide. Such popularity has attracted a growing interest from the research community, particularly regarding content characterization, n...
Conference Paper
Full-text available
While with traditional QoS-based charging the pricing structure mainly reflects the delivered QoS in order to regulate the demand, the role of service prices in a Quality of Experience (QoE) context is more complex. Amongst others, the charged price may in addition have a direct impact on the user's quality perception. In this paper, we analyze the...
Conference Paper
Studying the connection between QoE and QoS and its implications for network and content providers has yielded a couple of well-established experimental approaches. However, research in this field has mainly neglected economical aspects of user trials. This paper describes and evaluates an extended experimental setup to investigate willingness-to-p...
Conference Paper
Within QoE research it has become a generally acknowledged fact that user expectations can have considerable impact on subjective quality perception. In order to empirically quantify this influence we conducted a user study on expectations caused by the type of access network used. Study participants were asked to rate the QoE of various broadband...
Conference Paper
Triggered by the pending success of Quality of Service (QoS) differentiation in practice, recently the research interest has been increasingly focussing on the user-centric marketization of QoS, especially for interdomain scenarios. In this context, the key role of readiness and willingness to pay for enhanced network quality has not sufficiently b...
Conference Paper
Die Durchdringung des Alltags mit modernen Computertechnologien wie zum Beispiel Sozialen Netzwerken, Onlinestores oder Kundenkarten führt zu einem massiven Anstieg der erfassten und verarbeiteten persönlichen Daten. Die sich daraus ergebenden, mannigfaltigen Risiken hinsichtlich der Privatsphäre führen zu der Frage, warum betroffene Personen oft r...

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