[publication] The XAOS Metric – Understanding Visual Complexity as measure of usability

Our publication about “The XAOS Metric – Understanding Visual Complexity as measure of usability” held at the 6th Symposium (USAB 2010) of the Workgroup HCI&UE of the Austrian Computer Society in Carinthia (Southern Austria). The slides are already available here.

Abstract:

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 also evaluated with a web survey. We found a strong correlation for both methods on subjective ratings of visual complexity and structure. This suggests both methods to be reliable for determination of visual complexity.

Reference:Stickel, C.; Ebner, M.; Holzinger, A. (2010) The XAOS Metric: Understanding Visual Complexity as measure of usability. Springer Lecture Notes in Computer Science LNCS 6389. – in: Human-Computer Interaction in Work & Learning, Life & Leisure, Lecture Notes in Computer Science LNCS 6389., pp. 278 – 290

[publication] A Simple MVC Framework for Widget Development

Our publication on ”A Simple MVC Framework for Widget Development” for this year ECTEL-Conference is now online. Slides have been already published here.
Abstract:

The great advantage of a Rich Internet Application (RIA) is the improved performance, since a great part of the processing can be done on the client-side rather than the server-side. For many web-based RIAs JavaScript (JS) is the most common programming language as it is popular as a script language for browsers. While server-side programming languages have the advantages of object oriented programming paradigm, JS bases on objects with a specific object literal notation. Using design architectures such as Model View Controller (MVC) in JS reduces the code complexity and allows semi-parallel application development. It causes an easier and much less time-consuming development on further extensions of RIAs. Web-based widgets are actually RIAs. In this paper a very simple design pattern for widget development is introduced that bases on MVC design architecture. The pattern has been applied during the development phase of widgets for the Personal Learning Environment (PLE) at Graz University of Technology (TU Graz) and
is mostly appropriate for students and RIA developers who have beginner knowledge/experience in JS programming.


Reference: Taraghi, B.; Ebner, M. (2010) A Simple MVC Framework for Widget Development. – in: Proceedings of the 3rd Workshop on Mashup Personal Learning Environments (MUPPLE10), S. 1 – 8

[publication] @twitter Try out #Grabeeter to Export, Archive and Search Your Tweets

Our publication on “@twitter Try out #Grabeeter to Export, Archive and Search Your Tweets” for this year Research 2.0 Workshop at ECTEL Conference is now online available. The slides you will find here.
Abstract:

The microblogging platform Twitter is beside Facebook the fastest growing social networking application of the last years. It is used in different ways, e.g. to enhance events (conferences) by sending updates, hyperlinks or other data as a news-stream to a broader public. Until now the stream ends with the end of the event. In this publication a new application is introduced that allows information retrieval and knowledge discovery by searching through local stored tweets related to a corresponding event. The architecture of the prototype is described as well as how the data is being accessed by a web application and a local client. It can be stated that making tweets available after the end of an event, enhances the way we deal with information in future.

Reference: Mühlburger, H.; Ebner, M.; Taraghi, B., (2010) @twitter Try out #Grabeeter to Export, Archive and Search Your Tweets. – in: Research 2.0 approaches to TEL. (2010), S. 76 – 85, Workshop Proceeding, ECTEL 2010, [Link]

[publication] All I need to know about Twitter in Education I learned in Kindergarten

Our publication at this year World Computer Congress about “All I need to know about Twitter in Education I learned in Kindergarten” is now online as draft version available.
Abstract:

Share everything.
Play fair.
Don’t hit people.
Put things back where you found them.
Clean up your own mess.
Don’t take things that aren’t yours.
Say you’re sorry when you hurt somebody.
Wash your hands before you eat.
Flush.
Warm cookies and cold milk are good for you.
Live a balanced life – learn some and think some and draw and paint and sing and dance and play and work every day some.
Take a nap every afternoon.
When you go out into the world, watch out for traffic, hold hands and stick together.
Be aware of wonder.

Reference: Reinhardt, W., Wheeler, S., Ebner, M. (2010), All I need to know about Twitter in Education I learned in Kindergarten, N. Reynolds and M. Turcsányi-Szabó (Eds.): KCKS 2010, IFIP AICT 324, pp. 322–332, 2010

[publication] Get Granular on Twitter – Tweets from a Conference and their Limited Usefulness for Non-Participants

Our publication at this year World Computer Congress about “Get Granular on Twitter – Tweets from a Conference and their Limited Usefulness for Non-Participants” is now online as draft version available.
Abstract:

The use of microblogging applications (especially Twitter) becomes common in different settings. Nowadays, active conference participants post messages on microblogging platforms to exchange information fast and in real- time. Recent research work addressed quantitative analyses in terms of number of tweets or active Twitter user in a specific time period. In this publication we look at the content of the contributions. It can be shown that only a few posts are of interest for non-participants of the corresponding event and that a meaningful usage of a microblogging application needs carefulness.


Reference: Ebner, M., Mühlburger, H., Schön (aka Schaffert), S., Schiefner, M., Reinhardt, W., Wheeler, S. (2010) Get Granular on Twitter – Tweets from a Conference and their Limited Usefulness for Non-Participants, N. Reynolds and M. Turcsányi-Szabó (Eds.), KCKS 2010, IFIP AICT 324, pp. 102–113

[publication] Nintendo Wii Remote Controller in the classroom. A report on the Development and Evaluation of a Demonstrator Kit for e-Teaching

Our publication about “Nintendo Wii Remote Controller in the classroom. A report on the Development and Evaluation of a Demonstrator Kit for e-Teaching” is now published in the Journal Computer and Informatics.

Abstract:

Increasing availability of game based technologies together with advances in Human–Computer Interaction and Usability Engineering provides new challenges to virtual environments for their utilization in e-Teaching. Consequently, a goal is to provide learners with the equivalent of practical learning experiences, whilst, at the same time, supporting creativity for both teachers and learners. Current market surveys showed that the Wii remote controller (Wiimote) is more wide spread than standard Tablet 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 the area of e-Learning and 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 for the Wiimote in order to demonstrate that gestures can enhance the quality of the lecturing process.

Reference: Holzinger, A.; Softic, S.; Stickel, C.; Ebner, M.; Debevc, M.; Hu, B.: NINTENDO WII REMOTE CONTROLLER IN HIGHER EDUCATION: DEVELOPMENT AND EVALUATION OF A DEMONSTRATOR KIT FOR E-TEACHING. – in: Computing and informatics (2010) 29, S. 1001 – 1015

[publication] New Forms of and Tools for Cooperative Learning with Social Software in Higher Education

Sandra and I wrote a summary of different tools and forms of cooperative learning with Social Software in higher education. It was just published in the book “Computer-Assisted Teaching: New Developments” (ed. by Brayden A. Morris and George M. Ferguson).

Our abstract:

Since the new generation of Internet technology, called Web 2.0, has been introduced, a change of how users are dealing with the World Wide Web has been get into going. If access to the Web is available, today nearly anyone can actively participate and communicate online. Of course this recent evolution of the Web influences also the field of education. Former e-learning was mainly characterized by the use of content offered within learning management systems. Nowadays so called “Social Software” enables new possibilities and didactical approaches. In this chapter we give a short overview of how Social Software can support cooperative learning and how new technologies can enhance higher education in a meaningful new way. After a short introduction to the basics of cooperative learning different Social Software applications are classified and described. Practical examples are presented to show the general usage. In the end we conclude that these technologies have great impact on teaching and learning, as it will help to enhance education at universities.

Within the paper, we distinguished different forms of Social Software:

Social Software can be distinguished concerning their main purposes

  • Social presence and communication including discussion forums, Web chats, (micro-) blogging, (micro-) podcasting, and live streaming;
  • Collaborative development including tools that allow a collaborative work and development as the Wiki technology; or
  • Collaborative enrichment of content such as social bookmarking, social tagging, and rating.

Then we went on with a short description of different teaching settings (formally organised learning), where cooperative learning can be used:

1. Distance learning setting

The learners are distributed and do not meet in reality before and while learning and working together. The online communication is not always, but often asynchronous;

2. Blended learning setting

The learners meet in reality and additionally online but normally not parallel. The online communication usually is asynchronous;

3. Classroom group work setting – with 10 to 25 learners

Every learner additionally and parallel to “real” communication participates through networked computers or mobile phones on the group interaction

4. Lecture hall learning setting

The learners use networked computers or mobile phones to facilitate interaction and feedback loops in big groups of more than 40 people parallel to a (interactive) lecture.

In the paper we list tools and their usage and how it already worked (or not) within cooperative learning settings. We came to the conclusion (amongst other aspects!!):

The use of technology in education strongly depends on the questions how we can improve the quality of education and how we can benefit from it. For example, digital collaboration with the help of Wiki systems leads to new possibilities that had not been imaginable within a paper-based learning scenario. Furthermore tagging enhances learner’s content in a new meaningful way and makes the content shareable und reusable. Micro-blogging as described in previous chapters must be seen as a complete new form of communication – talking to a cloud, without knowing if anyone will read or even react to it.

As cooperative learning is very often a part of open educational practices, where learners have the possibilities to organize their own learning within their groups as active partners, changes of learning and teaching behavior is not only a matter of such new tools. Also the existing learning culture within the institution or the teaching abilities and attitudes of lectures are (amongst others) crucial aspects of teaching in higher education that has to be taken into account for a successful implementation or usage of such new tools for cooperative learning (cf. Schaffert, 2009).

Additionally, we have to bear in mind that such tools are not built especially for learning settings. It is up to the researchers and every single user to find out whether learners can benefit from it or not. (…)

Reference: Schaffert, Sandra & Ebner, Martin (2010). New Forms of and Tools for Cooperative Learning with Social Software in Higher Education. In: Brayden A. Morris & George M. Ferguson (Ed.), Computer-Assisted Teaching: New Developments. Nova Science Pub, p. 151-165.

[publication] Capture Your University

The publication of our contribution to this year IADIS e-Learning conference in Freiburg/Germany is now online. The presentation on “Capture Your University” has been already published [Link], as well as the podcast [Link].

Reference: Nagler, W.; Grigoriadis, Y.; Stickel, C.; Ebner, M. (2010), Capture Your University. – in: IADIS International Conference e-Learning 2010, p. 139 – 144