Publication statistics

Pub. period:2007-2009
Pub. count:4
Number of co-authors:16


Number of publications with 3 favourite co-authors:

Gregor Glass:
Kathrin Jepsen:
Sebastian Moeller:



Productive colleagues

Roman Englert's 3 most productive colleagues in number of publications:

Volker Wulf:55
Volkmar Pipek:24
Joachim Meyer:21

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Roman Englert


Publications by Roman Englert (bibliography)

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Ben-Asher, Noam, Meyer, Joachim, Parmet, Yisrael, Moeller, Sebastian and Englert, Roman (2009): Security and usability research using a microworld environment. In: Proceedings of 11th Conference on Human-computer interaction with mobile devices and services 2009. p. 54.

Technological developments and the addition of new features to existing applications or services require the inclusion of security mechanisms to protect the user. When using these mechanisms the user faces a tradeoff between more risky and more efficient or safer and less efficient use of the system. We discuss this tradeoff and present a novel complementary experimental system which provides researchers and corporations the ability to explore and model the usability and security tradeoff in the context of user interaction with security systems and psychological acceptability, even before the actual development and implementation processes have ended.

© All rights reserved Ben-Asher et al. and/or their publisher

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Jepsen, Kathrin, Glass, Gregor and Englert, Roman (2009): When 'one fits all' does not fit: study of visualization types for mobile help systems. In: Proceedings of the HCI09 Conference on People and Computers XXIII 2009. pp. 398-404.

An open question today is how the visualization of a mobile assistance interface should look like, e.g. if it should disappear automatically after some seconds or a user interaction is required. In this paper a survey is conducted that has the goal to gather practice-oriented interaction design guidelines to support design decisions of mobile help visualizations. The survey is based on four different visualization strategies in order to find the most appropriate. Five usage scenarios from the field of mobile messaging were selected. The study shows the first time that users have a concept of criticality for usage problems and that 'one fits all' solutions fail for (huge) user groups.

© All rights reserved Jepsen et al. and/or their publisher

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Metze, Florian, Englert, Roman, Bub, Udo, Burkhardt, Felix and Stegmann, Joachim (2009): Getting closer: tailored human-computer speech dialog. In Universal Access in the Information Society, 8 (2) pp. 97-108.

This paper presents an advanced call center, which adapts presentation and interaction strategy to properties of the caller such as age, gender, and emotional state. User studies on interactive voice response (IVR) systems have shown that these properties can be used effectively to "tailor" services to users or user groups who do not maintain personal preferences, e.g., because they do not use the service on a regular basis. The adopted approach to achieve individualization of services, without being able to personalize them, is based on the analysis of a caller's voice. This paper shows how this approach benefits service providers by being able to target entertainment and recommendation options. It also shows how this analysis at the same time benefits the customer, as it can increase accessibility of IVR systems to user segments which have particular expectations or which do not cope well with a "one size fits all" system. The paper summarizes the authors' current work on component technologies, such as emotion detection, age and gender recognition on telephony speech, and presents results of usability and acceptability tests as well as an architecture to integrate these technologies in future multi-modal contact centers. It is envisioned that these will eventually serve customers with an avatar representation of an agent and tailored interaction strategies, matching powerful output capabilities with advanced analysis of the user's input.

© All rights reserved Metze et al. and/or Springer Verlag

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Betz, Matthias, Huq, Mahmudul, Pipek, Volkmar, Rohde, Markus, Stevens, Gunnar, Englert, Roman and Wulf, Volker (2007): An Architecture for Adaptive and Adaptable Mobile Applications for Physically Handicapped People. In: Stephanidis, Constantine (ed.) UAHCI 2007 - 4th International Conference on Universal Access in Human-Computer Interaction - Part 1 July 22-27, 2007, Beijing, China. pp. 335-344.

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