Papers by Christian Stickel
Comput. Informatics, 2010
The increasing availability of game based technologies together with advances in Human-Computer I... more The increasing availability of game based technologies together with advances in Human-Computer Interaction (HCI) and usability engineering provides new challenges and opportunities to virtual environments in the context of e-Teaching. Consequently, an evident trend is to offer learners with the equivalent of practical learning experiences, whilst supporting creativity for both teachers and learners. Current market surveys showed surprisingly that the Wii remote controller (Wiimote) is more widely spread than standard PCs and is the most used computer input device worldwide, which given its collection of sensors, accelerometers and bluetooth technology, makes it of great interest for HCI experiments in e-Learning/e-Teaching. In this paper we discuss the importance of gestures for teaching and describe the design and development of a low-cost demonstrator kit based on Wiimote enhancing the quality of the lecturing with gestures.
Lecture Notes in Computer Science, 2014
Mensch und Computer im StrukturWandel, 2006
In the current ongoing work we propose the use of tracking and feedback mechanisms in order to im... more In the current ongoing work we propose the use of tracking and feedback mechanisms in order to improve our Personal Learning Environment (PLE), officially launched in October 2010. The approach can be seen as a necessary prerequisite similar to the darwinistic model of evolution. This means the implemented widgets will be improved (variation) and removed (selection) according to the observations. This paper will describe the backgrounds, methods and some details of the technical implementation.
This paper describes the implementation and integration of a m-Learning interface into the existi... more This paper describes the implementation and integration of a m-Learning interface into the existing University-wide e-Learning System. Thereby existing content and information from the e-learning environment is automatically styled and provided in a way, which is accessible for most mobile devices. Incompatible content is filtered out. The system has been developed at the Institute of Information Systems and Computer Media (IICM) of Graz University of Technology with a special focus on the needs of engineering students. ...
This paper presents the results achieved at Graz University of Technology (TU Graz) in the field ... more This paper presents the results achieved at Graz University of Technology (TU Graz) in the field of automating the process of recording and publishing university lectures in a very new way. It outlines cornerstones of the development and integration of an automated recording system such as the lecture hall setup, the recording hardware and software architecture as well as the development of a text-based search for the final product by method of indexing video podcasts. Furthermore, the paper takes a look at didactical aspects, evaluations done in this context and future outlook.
Abstract The increasing availability of game based technologies together with advances in Human-C... more Abstract The increasing availability of game based technologies together with advances in Human-Computer Interaction (HCI) and usability engineering provides new challenges and opportunities to virtual environments in the context of e-Teaching. Consequently, an evident trend is to offer learners with the equivalent of practical learning experiences, whilst supporting creativity for both teachers and learners.
Abstract. The wide availability of game based technologies and sophisticated e-Learning possibili... more Abstract. The wide availability of game based technologies and sophisticated e-Learning possibilities creates new demands and challenges on Human–Computer Interaction and Usability Engineering (HCI&UE). Solid research in HCI must support improvement in learning ability and creativity for both teachers and students. According to recent market surveys the Wii remote controller or Wiimote is currently more wide spread than standard Tablet PCs and is the most used computer input device worldwide.
Abstract This study compares three different models for the calculation and prediction of harmoni... more Abstract This study compares three different models for the calculation and prediction of harmonious color combinations. Therefore a dataset of user rated color combinations was taken from a large online database. The user rating was compared to the outcome of the three models on this dataset in order to test the performance of the models. The first model based on the idea that color combinations are more pleasing the greater their difference in brightness.
This paper describes the work done on the implementation of an integrated mobile lecture capture ... more This paper describes the work done on the implementation of an integrated mobile lecture capture system, which enables a faster workflow and the deliverance of high definition lecture records. The installation of two mobile remote controlled dome cameras and a HD video mixer ensures to accompany the content from annotated slides with live cuts of the lecturer from different angles and perspectives. The professional TV like production increases on the one hand the speed of processing for the production team and on the other hand enhances the viewing experience for the students. Positive feedback from students and an analysis of the media server log files indicate an increasing demand for videos, especially for mobile devices.
This paper describes a novel usability method called Shadow Expert Technique (SET), which was app... more This paper describes a novel usability method called Shadow Expert Technique (SET), which was applied on the learning management system of the Graz University of Technology in two different trials, with focus on consistency and visual complexity. This is the summary of the development of this new method and the approach to generalize it as a new way to get deeper insight into interaction processes.
The visual complexity of an interface is a crucial factor for usability, since it influences the ... more The visual complexity of an interface is a crucial factor for usability, since it influences the cognitive load and forms expectations about the subjacent software or system. In this paper we propose a novel method that uses entropy, structure and functions, to calculate the visual complexity of a website. Our method is evaluated against a well known approach of using the file size of color jpeg images for determining visual complexity. Both methods were applied on a dataset consisting of images of 30 different websites. These websites were ...
Graz University of Technology has a long tradition in the design, development and research of uni... more Graz University of Technology has a long tradition in the design, development and research of university wide Learning Management Systems (LMS). Inspired by the iPhone Style, the available system has now been extended by the addition of a mobile viewer, which grants the student mobile accessibility to all available online content. In this paper, we report on the lessons learned within a study on user experience with this specially designed LMS mobile viewer. The User Experience (UX) was measured by application of a 26 item questionnaire including the six factors Attractiveness, Perspicuity, Efficiency, Dependability, Stimulation and Novelty, according to . The results showed high rates of acceptance, although the novelty of our approach received a surprisingly low rating amongst the novice end users.
In this tutorial, we will present the Human Interface Guidelines for both iPhone and iPad and off... more In this tutorial, we will present the Human Interface Guidelines for both iPhone and iPad and offer hands-on experience in designing user interfaces for these devices. We will also discuss how to integrate the guidelines in higher education and give examples from our lecture on iPhone application development. The goal of the tutorial is to provide the participants with a basic understanding of the iPhone Human Interface Guidelines and enable them to review and design iPhone apps according to the standards.
This study compares three different models for the calculation and prediction of harmonious color... more This study compares three different models for the calculation and prediction of harmonious color combinations. Therefore a dataset of user rated color combinations was taken from a large online database. The user rating was compared to the outcome of the three models on this dataset in order to test the performance of the models. The first model based on the idea that color combinations are more pleasing the greater their difference in brightness. The second model is a slightly modified version of Ou & Lou (2006) using chromatic difference, lightness sum, lightness difference and hue effect. The last model was invented by us and is based on an experiment of Polzella & Montgomery (1993). From the outcome of their experiment we generated a lookup table for single color rating. This rating is then used in a formula, which is able to evaluate the color harmony for color combinations up to five colors. This model also performed best in the overall comparison between the three color harmony models.
The wide availability of game based technologies and sophisticated e-Learning possibilities creat... more The wide availability of game based technologies and sophisticated e-Learning possibilities creates new demands and challenges on Human-Computer Interaction and Usability Engineering (HCI&UE). Solid research in HCI must support improvement in learning ability and creativity for both teachers and students. According to recent market surveys the Wii remote controller or Wiimote is currently more wide spread than standard Tablet PCs and is the most used computer input device worldwide. As a collection of many sensors, also including Bluetooth technology, accelerometers and IR sensors, Wiimote is of great interest for HCI experiments, especially in the area of e-Learning and e-Teaching. In this paper, we present results gained from the investigation of the potential of Wiimote as both a standard input device -such as mouse or presenter -and as a gesture and finger tracking sensor. We demonstrate, on the basis of examples from e-Teaching, how easily everyday gestures can be interpreted in regular computer applications utilizing Wiimote's hardware modules and some additional software modules.
Emotion is an important mental and physiological state, influencing cognition, perception, learni... more Emotion is an important mental and physiological state, influencing cognition, perception, learning, communication, decision making, etc. It is considered as a definitive important aspect of user experience (UX), although at least well developed and most of all lacking experimental evidence. This paper deals with an application for emotion detection in usability testing of software. It describes the approach to utilize the valence arousal space for emotion modeling in a formal experiment. Our study revealed correlations between low performance and negative emotional states. Reliable emotion detection in usability tests will help to prevent negative emotions and attitudes in the final products. This can be a great advantage to enhance Universal Access.
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Papers by Christian Stickel