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Auflistung nach Schlagwort "evaluation"

1 - 10 von 32
  • Zeitschriftenartikel
    CogniPGA: Longitudinal Evaluation of Picture Gesture Authentication with Cognition-Based Intervention
    (i-com: Vol. 18, No. 3, 2019) Katsini, Christina; Avouris, Nikolaos; Fidas, Christos
    There is evidence that the visual behavior of users when creating graphical passwords affects the password strength. Adopting a cognitive style perspective in the interpretation of the results of recent studies revealed that users, depending on their cognitive style, follow different visual exploration paths when creating graphical passwords which affected the password strength. To take advantage of the inherent abilities of people, we proposed CogniPGA, a cued-recall graphical authentication scheme where a cognition-based intervention using gaze data is applied. This paper presents the longitudinal evaluation of the proposed scheme in terms of security, memorability, and usability from a cognitive style perspective. Results strengthen the assumptions that understanding and using the inherent cognitive characteristics of users could enable the design of user-first authentication schemes, where no compromises need to be made on security for benefiting usability or the other way around.
  • Konferenzbeitrag
    Cross-Browser Tests und die Tücken des Alltags
    (UP14 - Kurzvorträge, 2014) Charlier, Nicole; Süß, Daniel
    Die Diversität der Endgeräte erhöht sich jeden Tag. Ein Usability Professional steht hier vor den Fragen: 'Wie teste ich meine Anwendungen und wann bin ich damit fertig?' Aufwandsprojekte und Festpreisprojekte unterscheiden sich zudem stark im zeitlichen Umfang der Evaluation, sollen aber gleichwertig im Endergebnis sein. Welche Werkzeuge brauche ich als Usability Professional um effizient im Projektablauf die Qualität meiner Anwendungen zu gewährleisten? Praxiserfahrungen aus Festpreisprojekten sollen Usability Professionals helfen, die richtigen Fragen zu stellen und sich das eigene (physische oder virtuelle) 'Testlabor' zusammenzustellen.
  • Zeitschriftenartikel
    A design and evaluation framework for digital health interventions
    (it - Information Technology: Vol. 61, No. 5-6, 2019) Kowatsch, Tobias; Otto, Lena; Harperink, Samira; Cotti, Amanda; Schlieter, Hannes
    Digital health interventions (DHIs) have the potential to help the growing number of chronic disease patients better manage their everyday lives. However, guidelines for the systematic development of DHIs are still scarce. The current work has, therefore, the objective to propose a framework for the design and evaluation of DHIs (DEDHI). The DEDHI framework is meant to support both researchers and practitioners alike from early conceptual DHI models to large-scale implementations of DHIs in the healthcare market.
  • Report
    Designing Smart Urban Objects - Adaptation, Multi-user Usage, Walk-up-and-use and Joy of Use
    (2021) Koch, Michael; Fietkau, Julian; Stojko, Laura; Buck, Anna
    Designing human-computer interaction for non-personal computing devices in urban space poses different challenges than designing for personal devices. In this paper we summarize the findings from a project developing smart urban objects to help elderly people participate in urban life. We present four key challenges that have been identified designing such objects, and present first ideas for how to address these challenges. The four key challenges are adaptability (and data privacy), multi-user usage, walk-up-and-use and joy of use.
  • Textdokument
    Domain-Specific Conceptual Modeling
    (EMISA 2024, 2024) Paczona, Martin; Mayr, Heinrich C.; Prochart, Guenter
    This EMISA24 Current Research Talk is based on the authors' paper, recently published in the journal Data and Knowledge Engineering. We address the question of whether and how domain-specific modeling can increase productivity in the development of technical systems in an industrial setting. For, managers' decisions are ultimately based on whether or not the use of a new method pays off. The research was intertwined with a project in which we collaborated with a company to develop a domain-specific modeling method and tool for designing and implementing testbeds for electric vehicles.
  • Konferenzbeitrag
    EDA Scale - Assessing Awareness for Energy Dynamics
    (Mensch und Computer 2019 - Tagungsband, 2019) Gödker, Markus; Dresel, Markus; Franke, Thomas
    Energy-related behavior in resource dependent systems (e.g. electric vehicles, houses, ships) is an important factor for the actual energy efficiency such systems can achieve. Energy feedback human-machine-interfaces (HMIs) can support the awareness of energy dynamics in order to comprehend the situation and the influences on energy consumption and to control the system to enhance energy efficiency. To evaluate these HMIs a scale to assess the energy dynamics awareness (EDA) is needed. Therefore we developed the EDA scale with 7 items and tested the scale in a study with N = 40 battery electric bus (BEB) drivers on two different HMIs. First results indicated an excellent reliability (Cronbach’s α = .92 and .93) and principal factor analyses revealed a solid single factor structure (61.8% and 67.8% explained variance) with high factor loadings (> .61 for all items). Future studies should further explore the construct and criterion validity of the scale.
  • Zeitschriftenartikel
    Empirical Assessment of Advantages and Disadvantages of Model Transformation Languages
    (Softwaretechnik-Trends Band 44, Heft 2, 2024) Höppner, Stefan; Tichy, Matthias
    Model-driven software engineering envisages the use of model transformations to evolve models. The main objective of our work was to aggregate all necessary data to set up proper evaluation and use this data to asses the most prevalent claims about model transformation languages empirically. We aim to provide evidence on whether those claims withstand rigorous empirical scrutiny. Our work contributes much needed systematisation and empirical ground work to the body of knowledge on model transformation languages. We demonstrate that empirical evaluation of model transformation languages is feasible and necessary. Efforts to provide more empirical substance need to be undergone, and lacklustre language capabilities and tooling need to be improved. The results of this thesis can provide a basis for these further actions.
  • Konferenzbeitrag
    Evaluating a User-Elicited Gesture Set for Interactive Displays
    (Mensch & Computer 2011: überMEDIEN|ÜBERmorgen, 2011) Heydekorn, Jens; Frisch, Mathias; Dachselt, Raimund
    Recently, many studies were conducted which focused on eliciting gestures from users in order to come up with gesture sets for surface computing. However, there are still many questions to clarify concerning the value of this method regarding to the usability of such gesture sets in real systems. In this work, we contribute a usability test of an implemented gesture set based on user suggested pen and hand gestures for node-link diagram editing on interactive displays. The results of the usability test gave valuable insight in how users interact spontaneously with such a gestural interface. In particular, we found that the methodology of eliciting gestures from users reveals what kinds of gestures users prefer but does not necessarily show how they are applied. Beyond that, we observed how participants differentiate between touch and pen within complex workflows.
  • Workshopbeitrag
    Evaluating the engagement of users from public interactive displays
    (Mensch und Computer 2023 - Workshopband, 2023) Mathes, Lukas Klaus Peter; Cabalo, Coleen Celeste; Gatzemeyer, Lars
    An adaptive public display needs a good understanding of its environment. This means which objects are in the sphere of influence, how they behave and how they interact with them. Especially when dealing with users of an interactive public display, it is therefore important to have a metric about the engagement of passers-by. In this work, we incorporate the current state of research on topics related to engagement and mindfulness of passers-by of a public wall display. We use 3D depth camera data, which recognizes a model of passers-by. Based on different scientific approaches, we then build a model of the different parameters of attention to analyze the collected data. Through further experiments, we validate the validity of the model with respect to different test cases.
  • Konferenzbeitrag
    Evaluation Methods and Replicability of Software Architecture Research Objects
    (Software Engineering 2023, 2023) Konersmann, Marco; Kaplan, Angelika; Kühn, Thomas; Heinrich, Robert; Koziolek, Anne; Reussner, Ralf; Jürjens, Jan; al-Doori, Mahmood; Boltz, Nicolas; Ehl, Marco; Fuchß, Dominik; Großer, Katharina; Hahner, Sebastian; Keim, Jan; Lohr, Matthias; Sağlam, Timur; Schulz, Sophie; Töberg, Jan-Philipp
    Our paper at the 19th IEEE International Conference on Software Architecture (ICSA 2022) started by noticing that Software Architecture (SA) as research area experienced an increase in empirical research. Empirical research builds a sound foundation for validity and comparability. A current overview of the evaluation and replicability of SA research objects could help to discuss our empirical standards as a community. However, no current overview existed. We assessed the current state of practice of evaluating SA research objects and replication artifact provision in full technical conference papers from ICSA and the European Conference on Software Architecture (ECSA) 2017–2021. We first developed a categorization schema for SA research object evaluation and artifact provisioning. In a systematic literature review with 153 papers, we then classified the papers according to that schema. From our findings we derive and describe four proposals for improving the state of practice in evaluating SA research objects.