Sara Streng

In the field of collaborative learning, instructional designs are often used to structure learning processes. In order to support educationalists during the design of such learning scripts, graphical learning design editors have been developed, e.g. MoCoLaDe. The learning designs can then be exported using a formal specification, such as the markup...

Knowledge sharing is important in every team or organization. Various tools are frequently used in meetings to support knowledge sharing, ranging from pen-and-paper to whiteboards and other shared workspaces. This paper reports on a user study that investigated how private and shared displays affect knowledge sharing processes in co-located meeting...

Applying technologies in collaborative learning is an important but difficult task. In this work I will investigate ways of supporting “scripted” collaborative learning with technologies. “Scripted” means that the learning phases, activities and tasks are predefined by educationalists to provide some form of guidance. In particular, I focus on the...

The RELATE interaction model is designed to support spontaneous interaction of mobile users with devices and services in their environment. The model is based on spatial references that capture the spatial rela- tionship of a user's device with other co-located devices. Spatial references are obtained by relative position sensing and integrated in...

Studying in groups can have advantages as compared to doing so alone. Collaboration scripts are one means to handle the learning process systematically, by defining different phases and the tasks that individual team members should carry out. This paper presents a new concept to support the use of scripts during group learning: Non-invasive collabo...

External computer-supported collaboration scripts may support learners in collaboratively using new technologies. This contribution introduces a framework that offers an object-oriented package of classes and methods that supports eXtremely Simple Scripting (XSS), i.e., the rapid implementation of CSCL scripts for the use with new technologies. We...

This paper aims at answering the question how ambient displays can be used as group mirrors to support collaborative (learning) activities. Our research question is to what extent the type of feedback representation affects collaborative processes. Two different representations have been created and compared in a user study: a diagram and a metapho...

In this article, we look at advances and trends in pervasive computing and speculate about the future of multimedia. In the future, our interaction with computers would involve all our senses and emotions, including touch and smell, joy and excitement. The boundaries between the virtual and physical would blur and user interfaces might seem to beco...

External computer-supported collaboration scripts may support learners in collaboratively using new technologies. This contribution introduces a framework that offers an object-oriented package of classes and methods that supports eXtremely Simple Scripting (XSS), i.e., the rapid implementation of CSCL scripts for the use with new technologies. We...

Our everyday life is surrounded by pervasive services such as those oered by printers, public displays, multimedia systems, worksta- tions, etc. While on the run we should be able to use the mobile devices we carry along to interact with these services. Yet, a number of studies have shown that it is rather complicated for users to identify availabl...

The position of a user with respect to devices or the rela- tive position of multiple devices provides an indication of interaction that is intended by the user. Based on this as- sumption many applications proactively trigger an action when certain spatial conditions are fulfilled. A typical ex- ample is executing a local service when the proximit...

Discovery and interaction with services is as much a user in-terface problem as a networking problem. In this paper we introduce a system in which mobile devices are seamlessly extended with Gateways to services in their environment. The gateways are realized as widgets that are arranged around the edge of the mobile device's user interface to indi...

Discovery and interaction with services is as much a user interface problem as a networking problem. In this paper we introduce a system in which mobile devices are seam-lessly extended with Gateways to services in their environ-ment. The gateways are realized as widgets that are ar-ranged around the edge of the mobile device's user interface to in...

Although numerous context-aware applications have been developed and there have been technological advances for acquiring contextual informa- tion, it is still difficult to develop and prototype interesting context-aware appli- cations. This is largely due to the lack of programming support available to both programmers and end-users. This lack of...

In this chapter, we investigated to what extent the orchestration of collaborative learning (with vs. without individual preparation phase) affects knowledge convergence (knowledge sharing and shared knowledge) within small groups using an interactive table. Participants (N = 24) were randomly assigned to one of two conditions. The task dealt with...

This project deals with interaction across multiple devices in mobile computing envi-ronments, and will investigate the use of spatial information to support such interactions. Therefore a variety of application scenarios is considered, which involve spatially co-located devices, objects, or people. The general research aim is to understand how suc...