Number of co-authors:21
Number of publications with 3 favourite co-authors:Manfred Tscheligi:6Arjan Geven:2Verena Giller:2
Johann Schrammel's 3 most productive colleagues in number of publications:Manfred Tscheligi:105Mohamed Bourimi:53Helwig Hauser:31
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Publications by Johann Schrammel (bibliography)
Agudo, Isaac, Bourimi, Mohamed, Eicker, Stefan, Ganglbauer, Eva, Heim, Stephan, Kosta, Eleni, Kramer, Georg, Kumpot, Marek, Matyas, Vashek, Radatz, Karsten, Schrammel, Johann and Vivas, José Luis (2010). 8.1 Legal, economic and technical evaluation of the first platform and community prototype (PICOS FP7 EU PROJECT). Retrieved [Date unavailable] from PICOS consortium (picos-project.eu): http://www.picos-project.eu/fileadmin/user_upload/fmgr/Deliverables/WP8_Evaluation/D8.1_Legal_Economic_and_Technical_Evaluation/PICOS_D8.1_Evaluation_v1.0-final.pdf
In this deliverable a multi-disciplinary evaluation of the work performed during the first cycle of the PICOS project is conducted. The PICOS Platform Design and Architecture v1, the PICOS Platform Prototype v1 and the PICOS Angling Community Application Prototype v1 are evaluated from a legal, economic, technical and usability point of view. This multi-disciplinary evaluation focuses on the privacy and trust related elements of the PICOS project. One of the main aims of this evaluation is to highlight the PICOS concepts and to assess the way in which they were implemented in the PICOS platform design and architecture, the PICOS platform prototype and the PICOS Angling Community Prototype during the first cycle of the project. Based on their findings, the evaluators further propose recommendations that will be taken into account for the design and the development of the PICOS platform and application prototypes during the second cycle. The evaluation of the assurance in PICOS is conducted in detail under WP3, the outcome of which is already included in deliverables D3.1.1, D3.2.1 and D3.3.1. Given the fact that the WP3 deliverables are confidential, this present deliverable contains for reasons of completeness also a summary of the basic findings of the Assurance evaluation.
© All rights reserved Agudo et al. and/or their publisher
Schrammel, Johann, Leitner, Michael and Tscheligi, Manfred (2009): Semantically structured tag clouds: an empirical evaluation of clustered presentation approaches. In: Proceedings of ACM CHI 2009 Conference on Human Factors in Computing Systems 2009. pp. 2037-2040.
Tag clouds have become a frequently used interaction technique in the web. Recently several approaches to present tag clouds with the tags semantically clustered have been proposed. However, it remains unclear whether the expected gains in performance and advantages in interaction actually can be realized as no empirical evaluations of such approaches are available yet. In this paper we describe a series of experiments designed to evaluate the effects of semantic versus alphabetical and random arrangements of tags in tag clouds. The results of our work indicate that semantically clustered tag clouds can provide improvements over random layouts in specific search tasks and that they tend to increase the attention towards tags in small fonts compared to other layouts. Also, semantically structured tag clouds were preferred by about half of the users for general search tasks. Tag cloud layout does not seem to influence the ability to remember tags.
© All rights reserved Schrammel et al. and/or ACM Press
Schrammel, Johann, Köffel, Christina and Tscheligi, Manfred (2009): Personality traits, usage patterns and information disclosure in online communities. In: Proceedings of the HCI09 Conference on People and Computers XXIII 2009. pp. 169-174.
Online communities of different types have become an important part of the daily internet life of many people within the last couple of years. Both research and business have shown interest in studying the possibilities and risks related to these relatively new phenomena. Frequently discussed aspects that are tightly bound to online communities are their implications and effects on privacy issues. Available literature has shown that users generally disclose very much (private) information on such communities, and different factors influencing this behaviour were identified and studied. However, the influence and predictive power of personality traits on information disclosure in online communities has not yet been the subject of analysis. In this paper we report the results of an online survey investigating the relations between personality traits (based on the Fife-Factor Model), usage patterns and information disclosure of participants in different types of online communities.
© All rights reserved Schrammel et al. and/or their publisher
Schrammel, Johann, Geven, Arjan, Sefelin, Reinhard and Tscheligi, Manfred (2007): "Look!": using the gaze direction of embodied agents. In: Proceedings of ACM CHI 2007 Conference on Human Factors in Computing Systems 2007. pp. 1187-1190.
This paper describes the results of three studies investigating an embodied agent that supports its interaction with the user by gazing at corresponding objects within its close environment. Three experiments were conducted in order to research whether users can detect an agent's line of sight, whether the agent's gaze direction can help to guide the users' attention towards designated locations and whether such a setup can be used to improve realistic interaction situations. The results show that a) users can detect the agent's gaze direction quickly (within 200 ms) but not very exactly, b) the use of the agent's gaze direction can speed up but also slow down the detection of objects in dependence on their location and c) that the agent's gaze towards corresponding objects during the interaction can have counterproductive effects in realistic settings.
© All rights reserved Schrammel et al. and/or ACM Press
Geven, Arjan, Schrammel, Johann and Tscheligi, Manfred (2006): Interacting with embodied agents that can see: how vision-enabled agents can assist in spatial tasks. In: Proceedings of the Fourth Nordic Conference on Human-Computer Interaction 2006. pp. 135-144.
In this paper, we describe user experiences with a system equipped with cognitive vision that interacts with the user in the context of personal assistance in the office. A cognitive vision computer can see the user and user responses and react to situations that happen in the environment, crossing the boundary between the virtual and the physical world. How should such a seeing computer interact with its users? Three different interface styles -- a traditional GUI, a cartoon-like embodied agent and a realistic embodied agent -- are tested in two tasks where users are actively observed by a (simulated) cognitive vision system. The system assists them in problem solving. Both the non-embodied and the embodied interaction styles offer the user certain advantages and the pros and cons based on the experiment results are discussed in terms of performance, intelligence, trust, comfort, and social presence.
© All rights reserved Geven et al. and/or ACM Press
Schrammel, Johann, Giller, Verena, Tscheligi, Manfred, Kosara, Robert, Hauser, Helwig and Miksch, Silvia (2003): Experimental Evaluation of Semantic Depth of Field, a Preattentive Method for Focus+Context Visualization. In: Proceedings of IFIP INTERACT03: Human-Computer Interaction 2003, Zurich, Switzerland. p. 888.
Giller, Verena, Melcher, Rudolf, Schrammel, Johann, Sefelin, Reinhard and Tscheligi, Manfred (2003): Usability Evaluations for Multi-device Application Development Three Example Studies. In: Chittaro, Luca (ed.) Human-Computer Interaction with Mobile Devices and Services - 5th International Symposium - Mobile HCI 2003 September 8-11, 2003, Udine, Italy. pp. 302-316.
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